blob: 1c116dc03e0ec9a79493aa37606c2d6ed098b196 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001#ifndef _NET_XFRM_H
2#define _NET_XFRM_H
3
Herbert Xuaabc9762005-05-03 16:27:10 -07004#include <linux/compiler.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -07005#include <linux/xfrm.h>
6#include <linux/spinlock.h>
7#include <linux/list.h>
8#include <linux/skbuff.h>
Arnaldo Carvalho de Melo14c85022005-12-27 02:43:12 -02009#include <linux/socket.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070010#include <linux/pfkeyv2.h>
Masahide NAKAMURA57947082006-09-22 15:06:24 -070011#include <linux/ipsec.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070012#include <linux/in6.h>
Arjan van de Ven4a3e2f72006-03-20 22:33:17 -080013#include <linux/mutex.h>
Joy Lattenab5f5e82007-09-17 11:51:22 -070014#include <linux/audit.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070015
16#include <net/sock.h>
17#include <net/dst.h>
Herbert Xu436a0a42007-10-08 17:25:53 -070018#include <net/ip.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070019#include <net/route.h>
20#include <net/ipv6.h>
21#include <net/ip6_fib.h>
22
Masahide NAKAMURAd3d6dd32007-06-26 23:57:49 -070023#define XFRM_PROTO_ESP 50
24#define XFRM_PROTO_AH 51
25#define XFRM_PROTO_COMP 108
26#define XFRM_PROTO_IPIP 4
27#define XFRM_PROTO_IPV6 41
28#define XFRM_PROTO_ROUTING IPPROTO_ROUTING
29#define XFRM_PROTO_DSTOPTS IPPROTO_DSTOPTS
30
Linus Torvalds1da177e2005-04-16 15:20:36 -070031#define XFRM_ALIGN8(len) (((len) + 7) & ~7)
Herbert Xub59f45d2006-05-27 23:05:54 -070032#define MODULE_ALIAS_XFRM_MODE(family, encap) \
33 MODULE_ALIAS("xfrm-mode-" __stringify(family) "-" __stringify(encap))
Masahide NAKAMURAd3d6dd32007-06-26 23:57:49 -070034#define MODULE_ALIAS_XFRM_TYPE(family, proto) \
35 MODULE_ALIAS("xfrm-type-" __stringify(family) "-" __stringify(proto))
Linus Torvalds1da177e2005-04-16 15:20:36 -070036
Jamal Hadi Salimf8cd5482006-03-20 19:15:11 -080037extern struct sock *xfrm_nl;
38extern u32 sysctl_xfrm_aevent_etime;
39extern u32 sysctl_xfrm_aevent_rseqth;
40
Arjan van de Ven4a3e2f72006-03-20 22:33:17 -080041extern struct mutex xfrm_cfg_mutex;
Linus Torvalds1da177e2005-04-16 15:20:36 -070042
43/* Organization of SPD aka "XFRM rules"
44 ------------------------------------
45
46 Basic objects:
47 - policy rule, struct xfrm_policy (=SPD entry)
48 - bundle of transformations, struct dst_entry == struct xfrm_dst (=SA bundle)
49 - instance of a transformer, struct xfrm_state (=SA)
50 - template to clone xfrm_state, struct xfrm_tmpl
51
52 SPD is plain linear list of xfrm_policy rules, ordered by priority.
53 (To be compatible with existing pfkeyv2 implementations,
54 many rules with priority of 0x7fffffff are allowed to exist and
55 such rules are ordered in an unpredictable way, thanks to bsd folks.)
56
57 Lookup is plain linear search until the first match with selector.
58
59 If "action" is "block", then we prohibit the flow, otherwise:
60 if "xfrms_nr" is zero, the flow passes untransformed. Otherwise,
61 policy entry has list of up to XFRM_MAX_DEPTH transformations,
62 described by templates xfrm_tmpl. Each template is resolved
63 to a complete xfrm_state (see below) and we pack bundle of transformations
64 to a dst_entry returned to requestor.
65
66 dst -. xfrm .-> xfrm_state #1
67 |---. child .-> dst -. xfrm .-> xfrm_state #2
68 |---. child .-> dst -. xfrm .-> xfrm_state #3
69 |---. child .-> NULL
70
71 Bundles are cached at xrfm_policy struct (field ->bundles).
72
73
74 Resolution of xrfm_tmpl
75 -----------------------
76 Template contains:
77 1. ->mode Mode: transport or tunnel
78 2. ->id.proto Protocol: AH/ESP/IPCOMP
79 3. ->id.daddr Remote tunnel endpoint, ignored for transport mode.
80 Q: allow to resolve security gateway?
81 4. ->id.spi If not zero, static SPI.
82 5. ->saddr Local tunnel endpoint, ignored for transport mode.
83 6. ->algos List of allowed algos. Plain bitmask now.
84 Q: ealgos, aalgos, calgos. What a mess...
85 7. ->share Sharing mode.
86 Q: how to implement private sharing mode? To add struct sock* to
87 flow id?
88
89 Having this template we search through SAD searching for entries
90 with appropriate mode/proto/algo, permitted by selector.
91 If no appropriate entry found, it is requested from key manager.
92
93 PROBLEMS:
94 Q: How to find all the bundles referring to a physical path for
95 PMTU discovery? Seems, dst should contain list of all parents...
96 and enter to infinite locking hierarchy disaster.
97 No! It is easier, we will not search for them, let them find us.
98 We add genid to each dst plus pointer to genid of raw IP route,
99 pmtu disc will update pmtu on raw IP route and increase its genid.
100 dst_check() will see this for top level and trigger resyncing
101 metrics. Plus, it will be made via sk->sk_dst_cache. Solved.
102 */
103
104/* Full description of state of transformer. */
105struct xfrm_state
106{
107 /* Note: bydst is re-used during gc */
David S. Miller8f126e32006-08-24 02:45:07 -0700108 struct hlist_node bydst;
109 struct hlist_node bysrc;
110 struct hlist_node byspi;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700111
112 atomic_t refcnt;
113 spinlock_t lock;
114
115 struct xfrm_id id;
116 struct xfrm_selector sel;
117
David S. Miller9d4a7062006-08-24 03:18:09 -0700118 u32 genid;
119
Linus Torvalds1da177e2005-04-16 15:20:36 -0700120 /* Key manger bits */
121 struct {
122 u8 state;
123 u8 dying;
124 u32 seq;
125 } km;
126
127 /* Parameters of this state. */
128 struct {
129 u32 reqid;
130 u8 mode;
131 u8 replay_window;
132 u8 aalgo, ealgo, calgo;
133 u8 flags;
134 u16 family;
135 xfrm_address_t saddr;
136 int header_len;
137 int trailer_len;
138 } props;
139
140 struct xfrm_lifetime_cfg lft;
141
142 /* Data for transformer */
143 struct xfrm_algo *aalg;
144 struct xfrm_algo *ealg;
145 struct xfrm_algo *calg;
146
147 /* Data for encapsulator */
148 struct xfrm_encap_tmpl *encap;
149
Noriaki TAKAMIYA060f02a2006-08-23 18:18:55 -0700150 /* Data for care-of address */
151 xfrm_address_t *coaddr;
152
Linus Torvalds1da177e2005-04-16 15:20:36 -0700153 /* IPComp needs an IPIP tunnel for handling uncompressed packets */
154 struct xfrm_state *tunnel;
155
156 /* If a tunnel, number of users + 1 */
157 atomic_t tunnel_users;
158
159 /* State for replay detection */
160 struct xfrm_replay_state replay;
161
Jamal Hadi Salimf8cd5482006-03-20 19:15:11 -0800162 /* Replay detection state at the time we sent the last notification */
163 struct xfrm_replay_state preplay;
164
Jamal Hadi Salim27170962006-04-14 15:03:05 -0700165 /* internal flag that only holds state for delayed aevent at the
166 * moment
167 */
168 u32 xflags;
169
Jamal Hadi Salimf8cd5482006-03-20 19:15:11 -0800170 /* Replay detection notification settings */
171 u32 replay_maxage;
172 u32 replay_maxdiff;
173
174 /* Replay detection notification timer */
175 struct timer_list rtimer;
176
Linus Torvalds1da177e2005-04-16 15:20:36 -0700177 /* Statistics */
178 struct xfrm_stats stats;
179
180 struct xfrm_lifetime_cur curlft;
181 struct timer_list timer;
182
Masahide NAKAMURA9afaca02006-08-23 18:20:16 -0700183 /* Last used time */
184 u64 lastused;
185
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186 /* Reference to data common to all the instances of this
187 * transformer. */
188 struct xfrm_type *type;
Herbert Xub59f45d2006-05-27 23:05:54 -0700189 struct xfrm_mode *mode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190
Trent Jaegerdf718372005-12-13 23:12:27 -0800191 /* Security context */
192 struct xfrm_sec_ctx *security;
193
Linus Torvalds1da177e2005-04-16 15:20:36 -0700194 /* Private data of this transformer, format is opaque,
195 * interpreted by xfrm_type methods. */
196 void *data;
197};
198
Jamal Hadi Salim27170962006-04-14 15:03:05 -0700199/* xflags - make enum if more show up */
200#define XFRM_TIME_DEFER 1
201
Linus Torvalds1da177e2005-04-16 15:20:36 -0700202enum {
203 XFRM_STATE_VOID,
204 XFRM_STATE_ACQ,
205 XFRM_STATE_VALID,
206 XFRM_STATE_ERROR,
207 XFRM_STATE_EXPIRED,
208 XFRM_STATE_DEAD
209};
210
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -0700211/* callback structure passed from either netlink or pfkey */
212struct km_event
213{
Herbert Xubf088672005-06-18 22:44:00 -0700214 union {
215 u32 hard;
216 u32 proto;
217 u32 byid;
Jamal Hadi Salimf8cd5482006-03-20 19:15:11 -0800218 u32 aevent;
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -0700219 u32 type;
Herbert Xubf088672005-06-18 22:44:00 -0700220 } data;
221
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -0700222 u32 seq;
223 u32 pid;
224 u32 event;
225};
226
Linus Torvalds1da177e2005-04-16 15:20:36 -0700227struct xfrm_type;
228struct xfrm_dst;
229struct xfrm_policy_afinfo {
230 unsigned short family;
Herbert Xu73654d62006-05-27 23:06:33 -0700231 struct xfrm_type *type_map[IPPROTO_MAX];
Herbert Xub59f45d2006-05-27 23:05:54 -0700232 struct xfrm_mode *mode_map[XFRM_MODE_MAX];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233 struct dst_ops *dst_ops;
234 void (*garbage_collect)(void);
235 int (*dst_lookup)(struct xfrm_dst **dst, struct flowi *fl);
Patrick McHardya1e59ab2006-09-19 12:57:34 -0700236 int (*get_saddr)(xfrm_address_t *saddr, xfrm_address_t *daddr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700237 struct dst_entry *(*find_bundle)(struct flowi *fl, struct xfrm_policy *policy);
238 int (*bundle_create)(struct xfrm_policy *policy,
239 struct xfrm_state **xfrm,
240 int nx,
241 struct flowi *fl,
242 struct dst_entry **dst_p);
243 void (*decode_session)(struct sk_buff *skb,
244 struct flowi *fl);
245};
246
247extern int xfrm_policy_register_afinfo(struct xfrm_policy_afinfo *afinfo);
248extern int xfrm_policy_unregister_afinfo(struct xfrm_policy_afinfo *afinfo);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -0700249extern void km_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c);
250extern void km_state_notify(struct xfrm_state *x, struct km_event *c);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700251
252struct xfrm_tmpl;
Jamal Hadi Salim980ebd22006-03-20 19:16:40 -0800253extern int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol);
Jamal Hadi Salim53bc6b42006-03-20 19:17:03 -0800254extern void km_state_expired(struct xfrm_state *x, int hard, u32 pid);
255extern int __xfrm_state_delete(struct xfrm_state *x);
256
Linus Torvalds1da177e2005-04-16 15:20:36 -0700257struct xfrm_state_afinfo {
258 unsigned short family;
Herbert Xud094cd82005-06-20 13:19:41 -0700259 int (*init_flags)(struct xfrm_state *x);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700260 void (*init_tempsel)(struct xfrm_state *x, struct flowi *fl,
261 struct xfrm_tmpl *tmpl,
262 xfrm_address_t *daddr, xfrm_address_t *saddr);
Masahide NAKAMURA41a49cc2006-08-23 22:48:31 -0700263 int (*tmpl_sort)(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n);
264 int (*state_sort)(struct xfrm_state **dst, struct xfrm_state **src, int n);
Miika Komucdca7262007-02-06 14:24:56 -0800265 int (*output)(struct sk_buff *skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700266};
267
268extern int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo);
269extern int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo);
Miika Komucdca7262007-02-06 14:24:56 -0800270extern struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned short family);
271extern void xfrm_state_put_afinfo(struct xfrm_state_afinfo *afinfo);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700272
273extern void xfrm_state_delete_tunnel(struct xfrm_state *x);
274
Linus Torvalds1da177e2005-04-16 15:20:36 -0700275struct xfrm_type
276{
277 char *description;
278 struct module *owner;
279 __u8 proto;
Masahide NAKAMURA1b5c2292006-08-23 18:11:50 -0700280 __u8 flags;
281#define XFRM_TYPE_NON_FRAGMENT 1
Herbert Xu436a0a42007-10-08 17:25:53 -0700282#define XFRM_TYPE_REPLAY_PROT 2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700283
Herbert Xu72cb6962005-06-20 13:18:08 -0700284 int (*init_state)(struct xfrm_state *x);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700285 void (*destructor)(struct xfrm_state *);
Herbert Xue6956332006-04-01 00:52:46 -0800286 int (*input)(struct xfrm_state *, struct sk_buff *skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700287 int (*output)(struct xfrm_state *, struct sk_buff *pskb);
Masahide NAKAMURAdf0ba922006-08-23 20:41:00 -0700288 int (*reject)(struct xfrm_state *, struct sk_buff *, struct flowi *);
Masahide NAKAMURAaee5adb2006-08-23 17:57:28 -0700289 int (*hdr_offset)(struct xfrm_state *, struct sk_buff *, u8 **);
Masahide NAKAMURA99505a82006-08-23 18:10:33 -0700290 xfrm_address_t *(*local_addr)(struct xfrm_state *, xfrm_address_t *);
291 xfrm_address_t *(*remote_addr)(struct xfrm_state *, xfrm_address_t *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700292 /* Estimate maximal size of result of transformation of a dgram */
Patrick McHardyc5c25232007-04-09 11:47:18 -0700293 u32 (*get_mtu)(struct xfrm_state *, int size);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700294};
295
Linus Torvalds1da177e2005-04-16 15:20:36 -0700296extern int xfrm_register_type(struct xfrm_type *type, unsigned short family);
297extern int xfrm_unregister_type(struct xfrm_type *type, unsigned short family);
298extern struct xfrm_type *xfrm_get_type(u8 proto, unsigned short family);
299extern void xfrm_put_type(struct xfrm_type *type);
300
Herbert Xub59f45d2006-05-27 23:05:54 -0700301struct xfrm_mode {
302 int (*input)(struct xfrm_state *x, struct sk_buff *skb);
Jamal Hadi Salimeb878e82006-08-31 17:42:59 -0700303 int (*output)(struct xfrm_state *x,struct sk_buff *skb);
Herbert Xub59f45d2006-05-27 23:05:54 -0700304
305 struct module *owner;
306 unsigned int encap;
307};
308
309extern int xfrm_register_mode(struct xfrm_mode *mode, int family);
310extern int xfrm_unregister_mode(struct xfrm_mode *mode, int family);
311extern struct xfrm_mode *xfrm_get_mode(unsigned int encap, int family);
312extern void xfrm_put_mode(struct xfrm_mode *mode);
313
Linus Torvalds1da177e2005-04-16 15:20:36 -0700314struct xfrm_tmpl
315{
316/* id in template is interpreted as:
317 * daddr - destination of tunnel, may be zero for transport mode.
318 * spi - zero to acquire spi. Not zero if spi is static, then
319 * daddr must be fixed too.
320 * proto - AH/ESP/IPCOMP
321 */
322 struct xfrm_id id;
323
324/* Source address of tunnel. Ignored, if it is not a tunnel. */
325 xfrm_address_t saddr;
326
Miika Komu76b3f052006-11-30 16:40:43 -0800327 unsigned short encap_family;
328
Linus Torvalds1da177e2005-04-16 15:20:36 -0700329 __u32 reqid;
330
Masahide NAKAMURA7e49e6d2006-09-22 15:05:15 -0700331/* Mode: transport, tunnel etc. */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700332 __u8 mode;
333
334/* Sharing mode: unique, this session only, this user only etc. */
335 __u8 share;
336
337/* May skip this transfomration if no SA is found */
338 __u8 optional;
339
340/* Bit mask of algos allowed for acquisition */
341 __u32 aalgos;
342 __u32 ealgos;
343 __u32 calgos;
344};
345
Masahide NAKAMURA622dc822006-08-23 17:52:01 -0700346#define XFRM_MAX_DEPTH 6
Linus Torvalds1da177e2005-04-16 15:20:36 -0700347
348struct xfrm_policy
349{
350 struct xfrm_policy *next;
David S. Miller2518c7c2006-08-24 04:45:07 -0700351 struct hlist_node bydst;
352 struct hlist_node byidx;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700353
354 /* This lock only affects elements except for entry. */
355 rwlock_t lock;
356 atomic_t refcnt;
357 struct timer_list timer;
358
359 u32 priority;
360 u32 index;
361 struct xfrm_selector selector;
362 struct xfrm_lifetime_cfg lft;
363 struct xfrm_lifetime_cur curlft;
364 struct dst_entry *bundles;
Arnaldo Carvalho de Melo46ca5f52006-11-27 17:58:59 -0200365 u16 family;
366 u8 type;
367 u8 action;
368 u8 flags;
369 u8 dead;
370 u8 xfrm_nr;
371 /* XXX 1 byte hole, try to pack */
Trent Jaegerdf718372005-12-13 23:12:27 -0800372 struct xfrm_sec_ctx *security;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700373 struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH];
374};
375
Shinta Sugimoto80c9aba2007-02-08 13:11:42 -0800376struct xfrm_migrate {
377 xfrm_address_t old_daddr;
378 xfrm_address_t old_saddr;
379 xfrm_address_t new_daddr;
380 xfrm_address_t new_saddr;
381 u8 proto;
382 u8 mode;
383 u16 reserved;
384 u32 reqid;
385 u16 old_family;
386 u16 new_family;
387};
388
Jamal Hadi Salimf8cd5482006-03-20 19:15:11 -0800389#define XFRM_KM_TIMEOUT 30
390/* which seqno */
391#define XFRM_REPLAY_SEQ 1
392#define XFRM_REPLAY_OSEQ 2
393#define XFRM_REPLAY_SEQ_MASK 3
394/* what happened */
395#define XFRM_REPLAY_UPDATE XFRM_AE_CR
396#define XFRM_REPLAY_TIMEOUT XFRM_AE_CE
397
398/* default aevent timeout in units of 100ms */
399#define XFRM_AE_ETIME 10
400/* Async Event timer multiplier */
401#define XFRM_AE_ETH_M 10
402/* default seq threshold size */
403#define XFRM_AE_SEQT_SIZE 2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700404
405struct xfrm_mgr
406{
407 struct list_head list;
408 char *id;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -0700409 int (*notify)(struct xfrm_state *x, struct km_event *c);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700410 int (*acquire)(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *xp, int dir);
Venkat Yekkiralacb969f02006-07-24 23:32:20 -0700411 struct xfrm_policy *(*compile_policy)(struct sock *sk, int opt, u8 *data, int len, int *dir);
Al Viro5d36b182006-11-08 00:24:06 -0800412 int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -0700413 int (*notify_policy)(struct xfrm_policy *x, int dir, struct km_event *c);
Masahide NAKAMURA97a64b42006-08-23 20:44:06 -0700414 int (*report)(u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr);
Shinta Sugimoto80c9aba2007-02-08 13:11:42 -0800415 int (*migrate)(struct xfrm_selector *sel, u8 dir, u8 type, struct xfrm_migrate *m, int num_bundles);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700416};
417
418extern int xfrm_register_km(struct xfrm_mgr *km);
419extern int xfrm_unregister_km(struct xfrm_mgr *km);
420
David S. Miller2518c7c2006-08-24 04:45:07 -0700421extern unsigned int xfrm_policy_count[XFRM_POLICY_MAX*2];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700422
Herbert Xu436a0a42007-10-08 17:25:53 -0700423/*
424 * This structure is used for the duration where packets are being
425 * transformed by IPsec. As soon as the packet leaves IPsec the
426 * area beyond the generic IP part may be overwritten.
427 */
428struct xfrm_skb_cb {
429 union {
430 struct inet_skb_parm h4;
431 struct inet6_skb_parm h6;
432 } header;
433
434 /* Sequence number for replay protection. */
435 u64 seq;
436};
437
438#define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0]))
439
Joy Latten161a09e2006-11-27 13:11:54 -0600440/* Audit Information */
441struct xfrm_audit
442{
Joy Lattenab5f5e82007-09-17 11:51:22 -0700443 u32 loginuid;
Joy Latten161a09e2006-11-27 13:11:54 -0600444 u32 secid;
445};
Joy Lattenc9204d92006-11-30 15:50:43 -0600446
447#ifdef CONFIG_AUDITSYSCALL
Joy Lattenab5f5e82007-09-17 11:51:22 -0700448static inline struct audit_buffer *xfrm_audit_start(u32 auid, u32 sid)
449{
450 struct audit_buffer *audit_buf = NULL;
451 char *secctx;
452 u32 secctx_len;
453
454 audit_buf = audit_log_start(current->audit_context, GFP_ATOMIC,
455 AUDIT_MAC_IPSEC_EVENT);
456 if (audit_buf == NULL)
457 return NULL;
458
459 audit_log_format(audit_buf, "auid=%u", auid);
460
461 if (sid != 0 &&
462 security_secid_to_secctx(sid, &secctx, &secctx_len) == 0) {
463 audit_log_format(audit_buf, " subj=%s", secctx);
464 security_release_secctx(secctx, secctx_len);
465 } else
466 audit_log_task_context(audit_buf);
467 return audit_buf;
468}
469
470extern void xfrm_audit_policy_add(struct xfrm_policy *xp, int result,
471 u32 auid, u32 sid);
472extern void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result,
473 u32 auid, u32 sid);
474extern void xfrm_audit_state_add(struct xfrm_state *x, int result,
475 u32 auid, u32 sid);
476extern void xfrm_audit_state_delete(struct xfrm_state *x, int result,
477 u32 auid, u32 sid);
Joy Lattenc9204d92006-11-30 15:50:43 -0600478#else
Joy Lattenab5f5e82007-09-17 11:51:22 -0700479#define xfrm_audit_policy_add(x, r, a, s) do { ; } while (0)
480#define xfrm_audit_policy_delete(x, r, a, s) do { ; } while (0)
481#define xfrm_audit_state_add(x, r, a, s) do { ; } while (0)
482#define xfrm_audit_state_delete(x, r, a, s) do { ; } while (0)
Joy Lattenc9204d92006-11-30 15:50:43 -0600483#endif /* CONFIG_AUDITSYSCALL */
Joy Latten161a09e2006-11-27 13:11:54 -0600484
Linus Torvalds1da177e2005-04-16 15:20:36 -0700485static inline void xfrm_pol_hold(struct xfrm_policy *policy)
486{
487 if (likely(policy != NULL))
488 atomic_inc(&policy->refcnt);
489}
490
491extern void __xfrm_policy_destroy(struct xfrm_policy *policy);
492
493static inline void xfrm_pol_put(struct xfrm_policy *policy)
494{
495 if (atomic_dec_and_test(&policy->refcnt))
496 __xfrm_policy_destroy(policy);
497}
498
Masahide NAKAMURA4e81bb82006-08-23 22:43:30 -0700499#ifdef CONFIG_XFRM_SUB_POLICY
500static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols)
501{
502 int i;
503 for (i = npols - 1; i >= 0; --i)
504 xfrm_pol_put(pols[i]);
505}
506#else
507static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols)
508{
509 xfrm_pol_put(pols[0]);
510}
511#endif
512
Linus Torvalds1da177e2005-04-16 15:20:36 -0700513extern void __xfrm_state_destroy(struct xfrm_state *);
514
Herbert Xu21380b82006-02-22 14:47:13 -0800515static inline void __xfrm_state_put(struct xfrm_state *x)
516{
517 atomic_dec(&x->refcnt);
518}
519
Linus Torvalds1da177e2005-04-16 15:20:36 -0700520static inline void xfrm_state_put(struct xfrm_state *x)
521{
522 if (atomic_dec_and_test(&x->refcnt))
523 __xfrm_state_destroy(x);
524}
525
526static inline void xfrm_state_hold(struct xfrm_state *x)
527{
528 atomic_inc(&x->refcnt);
529}
530
531static __inline__ int addr_match(void *token1, void *token2, int prefixlen)
532{
Al Viro5f193432006-09-27 18:46:32 -0700533 __be32 *a1 = token1;
534 __be32 *a2 = token2;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700535 int pdw;
536 int pbi;
537
538 pdw = prefixlen >> 5; /* num of whole __u32 in prefix */
539 pbi = prefixlen & 0x1f; /* num of bits in incomplete u32 in prefix */
540
541 if (pdw)
542 if (memcmp(a1, a2, pdw << 2))
543 return 0;
544
545 if (pbi) {
Al Viro5f193432006-09-27 18:46:32 -0700546 __be32 mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700547
548 mask = htonl((0xffffffff) << (32 - pbi));
549
550 if ((a1[pdw] ^ a2[pdw]) & mask)
551 return 0;
552 }
553
554 return 1;
555}
556
557static __inline__
Al Virof9d07e41f82006-09-27 18:45:50 -0700558__be16 xfrm_flowi_sport(struct flowi *fl)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700559{
Al Virof9d07e41f82006-09-27 18:45:50 -0700560 __be16 port;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700561 switch(fl->proto) {
562 case IPPROTO_TCP:
563 case IPPROTO_UDP:
Gerrit Renkerba4e58e2006-11-27 11:10:57 -0800564 case IPPROTO_UDPLITE:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700565 case IPPROTO_SCTP:
566 port = fl->fl_ip_sport;
567 break;
568 case IPPROTO_ICMP:
569 case IPPROTO_ICMPV6:
570 port = htons(fl->fl_icmp_type);
571 break;
Masahide NAKAMURA2ce42722006-08-23 20:39:03 -0700572 case IPPROTO_MH:
573 port = htons(fl->fl_mh_type);
574 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700575 default:
576 port = 0; /*XXX*/
577 }
578 return port;
579}
580
581static __inline__
Al Virof9d07e41f82006-09-27 18:45:50 -0700582__be16 xfrm_flowi_dport(struct flowi *fl)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700583{
Al Virof9d07e41f82006-09-27 18:45:50 -0700584 __be16 port;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700585 switch(fl->proto) {
586 case IPPROTO_TCP:
587 case IPPROTO_UDP:
Gerrit Renkerba4e58e2006-11-27 11:10:57 -0800588 case IPPROTO_UDPLITE:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700589 case IPPROTO_SCTP:
590 port = fl->fl_ip_dport;
591 break;
592 case IPPROTO_ICMP:
593 case IPPROTO_ICMPV6:
594 port = htons(fl->fl_icmp_code);
595 break;
596 default:
597 port = 0; /*XXX*/
598 }
599 return port;
600}
601
Andrew Morton77681022006-11-08 22:46:26 -0800602extern int xfrm_selector_match(struct xfrm_selector *sel, struct flowi *fl,
603 unsigned short family);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700604
Trent Jaegerdf718372005-12-13 23:12:27 -0800605#ifdef CONFIG_SECURITY_NETWORK_XFRM
606/* If neither has a context --> match
607 * Otherwise, both must have a context and the sids, doi, alg must match
608 */
609static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2)
610{
611 return ((!s1 && !s2) ||
612 (s1 && s2 &&
613 (s1->ctx_sid == s2->ctx_sid) &&
614 (s1->ctx_doi == s2->ctx_doi) &&
615 (s1->ctx_alg == s2->ctx_alg)));
616}
617#else
618static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2)
619{
620 return 1;
621}
622#endif
623
Linus Torvalds1da177e2005-04-16 15:20:36 -0700624/* A struct encoding bundle of transformations to apply to some set of flow.
625 *
626 * dst->child points to the next element of bundle.
627 * dst->xfrm points to an instanse of transformer.
628 *
629 * Due to unfortunate limitations of current routing cache, which we
630 * have no time to fix, it mirrors struct rtable and bound to the same
631 * routing key, including saddr,daddr. However, we can have many of
632 * bundles differing by session id. All the bundles grow from a parent
633 * policy rule.
634 */
635struct xfrm_dst
636{
637 union {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700638 struct dst_entry dst;
639 struct rtable rt;
640 struct rt6_info rt6;
641 } u;
642 struct dst_entry *route;
Masahide NAKAMURA157bfc22007-04-30 00:33:35 -0700643#ifdef CONFIG_XFRM_SUB_POLICY
644 struct flowi *origin;
645 struct xfrm_selector *partner;
646#endif
David S. Miller9d4a7062006-08-24 03:18:09 -0700647 u32 genid;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700648 u32 route_mtu_cached;
649 u32 child_mtu_cached;
Hideaki YOSHIFUJI92d63de2005-05-26 12:58:04 -0700650 u32 route_cookie;
651 u32 path_cookie;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700652};
653
Herbert Xuaabc9762005-05-03 16:27:10 -0700654static inline void xfrm_dst_destroy(struct xfrm_dst *xdst)
655{
656 dst_release(xdst->route);
657 if (likely(xdst->u.dst.xfrm))
658 xfrm_state_put(xdst->u.dst.xfrm);
Masahide NAKAMURA157bfc22007-04-30 00:33:35 -0700659#ifdef CONFIG_XFRM_SUB_POLICY
660 kfree(xdst->origin);
661 xdst->origin = NULL;
662 kfree(xdst->partner);
663 xdst->partner = NULL;
664#endif
Herbert Xuaabc9762005-05-03 16:27:10 -0700665}
666
667extern void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev);
668
Linus Torvalds1da177e2005-04-16 15:20:36 -0700669struct sec_path
670{
671 atomic_t refcnt;
672 int len;
Herbert Xudbe5b4a2006-04-01 00:54:16 -0800673 struct xfrm_state *xvec[XFRM_MAX_DEPTH];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700674};
675
676static inline struct sec_path *
677secpath_get(struct sec_path *sp)
678{
679 if (sp)
680 atomic_inc(&sp->refcnt);
681 return sp;
682}
683
684extern void __secpath_destroy(struct sec_path *sp);
685
686static inline void
687secpath_put(struct sec_path *sp)
688{
689 if (sp && atomic_dec_and_test(&sp->refcnt))
690 __secpath_destroy(sp);
691}
692
693extern struct sec_path *secpath_dup(struct sec_path *src);
694
695static inline void
696secpath_reset(struct sk_buff *skb)
697{
698#ifdef CONFIG_XFRM
699 secpath_put(skb->sp);
700 skb->sp = NULL;
701#endif
702}
703
704static inline int
Patrick McHardya1e59ab2006-09-19 12:57:34 -0700705xfrm_addr_any(xfrm_address_t *addr, unsigned short family)
706{
707 switch (family) {
708 case AF_INET:
709 return addr->a4 == 0;
710 case AF_INET6:
711 return ipv6_addr_any((struct in6_addr *)&addr->a6);
712 }
713 return 0;
714}
715
716static inline int
Linus Torvalds1da177e2005-04-16 15:20:36 -0700717__xfrm4_state_addr_cmp(struct xfrm_tmpl *tmpl, struct xfrm_state *x)
718{
719 return (tmpl->saddr.a4 &&
720 tmpl->saddr.a4 != x->props.saddr.a4);
721}
722
723static inline int
724__xfrm6_state_addr_cmp(struct xfrm_tmpl *tmpl, struct xfrm_state *x)
725{
726 return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) &&
727 ipv6_addr_cmp((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr));
728}
729
730static inline int
731xfrm_state_addr_cmp(struct xfrm_tmpl *tmpl, struct xfrm_state *x, unsigned short family)
732{
733 switch (family) {
734 case AF_INET:
735 return __xfrm4_state_addr_cmp(tmpl, x);
736 case AF_INET6:
737 return __xfrm6_state_addr_cmp(tmpl, x);
738 }
739 return !0;
740}
741
742#ifdef CONFIG_XFRM
743
744extern int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb, unsigned short family);
745
746static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family)
747{
748 if (sk && sk->sk_policy[XFRM_POLICY_IN])
749 return __xfrm_policy_check(sk, dir, skb, family);
Masahide NAKAMURA4e81bb82006-08-23 22:43:30 -0700750
David S. Miller2518c7c2006-08-24 04:45:07 -0700751 return (!xfrm_policy_count[dir] && !skb->sp) ||
Linus Torvalds1da177e2005-04-16 15:20:36 -0700752 (skb->dst->flags & DST_NOPOLICY) ||
753 __xfrm_policy_check(sk, dir, skb, family);
754}
755
756static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
757{
758 return xfrm_policy_check(sk, dir, skb, AF_INET);
759}
760
761static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
762{
763 return xfrm_policy_check(sk, dir, skb, AF_INET6);
764}
765
Patrick McHardy3e3850e2006-01-06 23:04:54 -0800766extern int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, unsigned short family);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700767extern int __xfrm_route_forward(struct sk_buff *skb, unsigned short family);
768
769static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family)
770{
David S. Miller2518c7c2006-08-24 04:45:07 -0700771 return !xfrm_policy_count[XFRM_POLICY_OUT] ||
Linus Torvalds1da177e2005-04-16 15:20:36 -0700772 (skb->dst->flags & DST_NOXFRM) ||
773 __xfrm_route_forward(skb, family);
774}
775
776static inline int xfrm4_route_forward(struct sk_buff *skb)
777{
778 return xfrm_route_forward(skb, AF_INET);
779}
780
781static inline int xfrm6_route_forward(struct sk_buff *skb)
782{
783 return xfrm_route_forward(skb, AF_INET6);
784}
785
786extern int __xfrm_sk_clone_policy(struct sock *sk);
787
788static inline int xfrm_sk_clone_policy(struct sock *sk)
789{
790 if (unlikely(sk->sk_policy[0] || sk->sk_policy[1]))
791 return __xfrm_sk_clone_policy(sk);
792 return 0;
793}
794
Herbert Xu4666faa2005-06-18 22:43:22 -0700795extern int xfrm_policy_delete(struct xfrm_policy *pol, int dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700796
797static inline void xfrm_sk_free_policy(struct sock *sk)
798{
799 if (unlikely(sk->sk_policy[0] != NULL)) {
800 xfrm_policy_delete(sk->sk_policy[0], XFRM_POLICY_MAX);
801 sk->sk_policy[0] = NULL;
802 }
803 if (unlikely(sk->sk_policy[1] != NULL)) {
804 xfrm_policy_delete(sk->sk_policy[1], XFRM_POLICY_MAX+1);
805 sk->sk_policy[1] = NULL;
806 }
807}
808
809#else
810
811static inline void xfrm_sk_free_policy(struct sock *sk) {}
812static inline int xfrm_sk_clone_policy(struct sock *sk) { return 0; }
813static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; }
814static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; }
815static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
816{
817 return 1;
818}
819static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
820{
821 return 1;
822}
823static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family)
824{
825 return 1;
826}
827#endif
828
829static __inline__
830xfrm_address_t *xfrm_flowi_daddr(struct flowi *fl, unsigned short family)
831{
832 switch (family){
833 case AF_INET:
834 return (xfrm_address_t *)&fl->fl4_dst;
835 case AF_INET6:
836 return (xfrm_address_t *)&fl->fl6_dst;
837 }
838 return NULL;
839}
840
841static __inline__
842xfrm_address_t *xfrm_flowi_saddr(struct flowi *fl, unsigned short family)
843{
844 switch (family){
845 case AF_INET:
846 return (xfrm_address_t *)&fl->fl4_src;
847 case AF_INET6:
848 return (xfrm_address_t *)&fl->fl6_src;
849 }
850 return NULL;
851}
852
853static __inline__ int
854__xfrm4_state_addr_check(struct xfrm_state *x,
855 xfrm_address_t *daddr, xfrm_address_t *saddr)
856{
857 if (daddr->a4 == x->id.daddr.a4 &&
858 (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4))
859 return 1;
860 return 0;
861}
862
863static __inline__ int
864__xfrm6_state_addr_check(struct xfrm_state *x,
865 xfrm_address_t *daddr, xfrm_address_t *saddr)
866{
867 if (!ipv6_addr_cmp((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) &&
868 (!ipv6_addr_cmp((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr)||
869 ipv6_addr_any((struct in6_addr *)saddr) ||
870 ipv6_addr_any((struct in6_addr *)&x->props.saddr)))
871 return 1;
872 return 0;
873}
874
875static __inline__ int
876xfrm_state_addr_check(struct xfrm_state *x,
877 xfrm_address_t *daddr, xfrm_address_t *saddr,
878 unsigned short family)
879{
880 switch (family) {
881 case AF_INET:
882 return __xfrm4_state_addr_check(x, daddr, saddr);
883 case AF_INET6:
884 return __xfrm6_state_addr_check(x, daddr, saddr);
885 }
886 return 0;
887}
888
Masahide NAKAMURAe53820d2006-08-23 19:12:01 -0700889static __inline__ int
890xfrm_state_addr_flow_check(struct xfrm_state *x, struct flowi *fl,
891 unsigned short family)
892{
893 switch (family) {
894 case AF_INET:
895 return __xfrm4_state_addr_check(x,
896 (xfrm_address_t *)&fl->fl4_dst,
897 (xfrm_address_t *)&fl->fl4_src);
898 case AF_INET6:
899 return __xfrm6_state_addr_check(x,
900 (xfrm_address_t *)&fl->fl6_dst,
901 (xfrm_address_t *)&fl->fl6_src);
902 }
903 return 0;
904}
905
Linus Torvalds1da177e2005-04-16 15:20:36 -0700906static inline int xfrm_state_kern(struct xfrm_state *x)
907{
908 return atomic_read(&x->tunnel_users);
909}
910
Masahide NAKAMURA57947082006-09-22 15:06:24 -0700911static inline int xfrm_id_proto_match(u8 proto, u8 userproto)
912{
Masahide NAKAMURAdc00a522006-08-23 17:49:52 -0700913 return (!userproto || proto == userproto ||
914 (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH ||
915 proto == IPPROTO_ESP ||
916 proto == IPPROTO_COMP)));
Masahide NAKAMURA57947082006-09-22 15:06:24 -0700917}
918
Linus Torvalds1da177e2005-04-16 15:20:36 -0700919/*
920 * xfrm algorithm information
921 */
922struct xfrm_algo_auth_info {
923 u16 icv_truncbits;
924 u16 icv_fullbits;
925};
926
927struct xfrm_algo_encr_info {
928 u16 blockbits;
929 u16 defkeybits;
930};
931
932struct xfrm_algo_comp_info {
933 u16 threshold;
934};
935
936struct xfrm_algo_desc {
937 char *name;
Herbert Xu04ff1262006-08-13 08:50:00 +1000938 char *compat;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700939 u8 available:1;
940 union {
941 struct xfrm_algo_auth_info auth;
942 struct xfrm_algo_encr_info encr;
943 struct xfrm_algo_comp_info comp;
944 } uinfo;
945 struct sadb_alg desc;
946};
947
948/* XFRM tunnel handlers. */
949struct xfrm_tunnel {
950 int (*handler)(struct sk_buff *skb);
Herbert Xud2acc342006-03-28 01:12:13 -0800951 int (*err_handler)(struct sk_buff *skb, __u32 info);
952
953 struct xfrm_tunnel *next;
954 int priority;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700955};
956
957struct xfrm6_tunnel {
Herbert Xud2acc342006-03-28 01:12:13 -0800958 int (*handler)(struct sk_buff *skb);
959 int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt,
Al Viro04ce6902006-11-08 00:21:01 -0800960 int type, int code, int offset, __be32 info);
Herbert Xud2acc342006-03-28 01:12:13 -0800961 struct xfrm6_tunnel *next;
962 int priority;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700963};
964
965extern void xfrm_init(void);
966extern void xfrm4_init(void);
967extern void xfrm6_init(void);
968extern void xfrm6_fini(void);
969extern void xfrm_state_init(void);
970extern void xfrm4_state_init(void);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700971extern void xfrm6_state_init(void);
972extern void xfrm6_state_fini(void);
973
974extern int xfrm_state_walk(u8 proto, int (*func)(struct xfrm_state *, int, void*), void *);
975extern struct xfrm_state *xfrm_state_alloc(void);
976extern struct xfrm_state *xfrm_state_find(xfrm_address_t *daddr, xfrm_address_t *saddr,
977 struct flowi *fl, struct xfrm_tmpl *tmpl,
978 struct xfrm_policy *pol, int *err,
979 unsigned short family);
Jamal Hadi Salim628529b2007-07-02 22:41:14 -0700980extern struct xfrm_state * xfrm_stateonly_find(xfrm_address_t *daddr,
981 xfrm_address_t *saddr,
982 unsigned short family,
983 u8 mode, u8 proto, u32 reqid);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700984extern int xfrm_state_check_expire(struct xfrm_state *x);
985extern void xfrm_state_insert(struct xfrm_state *x);
986extern int xfrm_state_add(struct xfrm_state *x);
987extern int xfrm_state_update(struct xfrm_state *x);
Al Viroa94cfd12006-09-27 18:47:24 -0700988extern struct xfrm_state *xfrm_state_lookup(xfrm_address_t *daddr, __be32 spi, u8 proto, unsigned short family);
Masahide NAKAMURAeb2971b2006-08-23 17:56:04 -0700989extern struct xfrm_state *xfrm_state_lookup_byaddr(xfrm_address_t *daddr, xfrm_address_t *saddr, u8 proto, unsigned short family);
Masahide NAKAMURA41a49cc2006-08-23 22:48:31 -0700990#ifdef CONFIG_XFRM_SUB_POLICY
991extern int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src,
992 int n, unsigned short family);
993extern int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src,
994 int n, unsigned short family);
995#else
996static inline int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src,
997 int n, unsigned short family)
998{
999 return -ENOSYS;
1000}
1001
1002static inline int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src,
1003 int n, unsigned short family)
1004{
1005 return -ENOSYS;
1006}
1007#endif
Jamal Hadi Salimaf11e312007-05-04 12:55:13 -07001008
1009struct xfrmk_sadinfo {
1010 u32 sadhcnt; /* current hash bkts */
1011 u32 sadhmcnt; /* max allowed hash bkts */
1012 u32 sadcnt; /* current running count */
1013};
1014
Jamal Hadi Salim5a6d3412007-05-04 12:55:39 -07001015struct xfrmk_spdinfo {
1016 u32 incnt;
1017 u32 outcnt;
1018 u32 fwdcnt;
1019 u32 inscnt;
1020 u32 outscnt;
1021 u32 fwdscnt;
1022 u32 spdhcnt;
1023 u32 spdhmcnt;
1024};
1025
Linus Torvalds1da177e2005-04-16 15:20:36 -07001026extern struct xfrm_state *xfrm_find_acq_byseq(u32 seq);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001027extern int xfrm_state_delete(struct xfrm_state *x);
Joy Latten4aa2e622007-06-04 19:05:57 -04001028extern int xfrm_state_flush(u8 proto, struct xfrm_audit *audit_info);
Jamal Hadi Salimaf11e312007-05-04 12:55:13 -07001029extern void xfrm_sad_getinfo(struct xfrmk_sadinfo *si);
Jamal Hadi Salim5a6d3412007-05-04 12:55:39 -07001030extern void xfrm_spd_getinfo(struct xfrmk_spdinfo *si);
Al Viroa252cc22006-09-27 18:48:18 -07001031extern int xfrm_replay_check(struct xfrm_state *x, __be32 seq);
Al Viro61f46272006-09-27 18:48:33 -07001032extern void xfrm_replay_advance(struct xfrm_state *x, __be32 seq);
Jamal Hadi Salimf8cd5482006-03-20 19:15:11 -08001033extern void xfrm_replay_notify(struct xfrm_state *x, int event);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001034extern int xfrm_state_mtu(struct xfrm_state *x, int mtu);
Herbert Xu72cb6962005-06-20 13:18:08 -07001035extern int xfrm_init_state(struct xfrm_state *x);
Herbert Xu406ef772007-10-08 17:16:30 -07001036extern int xfrm_output(struct sk_buff *skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001037extern int xfrm4_rcv(struct sk_buff *skb);
1038extern int xfrm4_output(struct sk_buff *skb);
Kazunori MIYAZAWAc0d56402007-02-13 12:54:47 -08001039extern int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family);
1040extern int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family);
Al Viroa252cc22006-09-27 18:48:18 -07001041extern int xfrm6_rcv_spi(struct sk_buff *skb, __be32 spi);
Patrick McHardy951dbc82006-01-06 23:02:34 -08001042extern int xfrm6_rcv(struct sk_buff **pskb);
Masahide NAKAMURAfbd9a5b2006-08-23 18:08:21 -07001043extern int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr,
1044 xfrm_address_t *saddr, u8 proto);
Kazunori MIYAZAWA73d605d2007-02-13 12:55:55 -08001045extern int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family);
1046extern int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family);
Al Viro8c689a62006-11-08 00:20:21 -08001047extern __be32 xfrm6_tunnel_alloc_spi(xfrm_address_t *saddr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001048extern void xfrm6_tunnel_free_spi(xfrm_address_t *saddr);
Al Viro8c689a62006-11-08 00:20:21 -08001049extern __be32 xfrm6_tunnel_spi_lookup(xfrm_address_t *saddr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001050extern int xfrm6_output(struct sk_buff *skb);
Masahide NAKAMURAaee5adb2006-08-23 17:57:28 -07001051extern int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb,
1052 u8 **prevhdr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001053
1054#ifdef CONFIG_XFRM
James Chapman067b2072007-07-05 17:08:05 -07001055extern int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001056extern int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen);
1057extern int xfrm_dst_lookup(struct xfrm_dst **dst, struct flowi *fl, unsigned short family);
1058#else
1059static inline int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen)
1060{
1061 return -ENOPROTOOPT;
1062}
1063
James Chapman067b2072007-07-05 17:08:05 -07001064static inline int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001065{
1066 /* should not happen */
1067 kfree_skb(skb);
1068 return 0;
1069}
James Chapman067b2072007-07-05 17:08:05 -07001070
Linus Torvalds1da177e2005-04-16 15:20:36 -07001071static inline int xfrm_dst_lookup(struct xfrm_dst **dst, struct flowi *fl, unsigned short family)
1072{
1073 return -EINVAL;
1074}
1075#endif
1076
Al Virodd0fc662005-10-07 07:46:04 +01001077struct xfrm_policy *xfrm_policy_alloc(gfp_t gfp);
Masahide NAKAMURA4e81bb82006-08-23 22:43:30 -07001078extern int xfrm_policy_walk(u8 type, int (*func)(struct xfrm_policy *, int, int, void*), void *);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001079int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl);
Masahide NAKAMURA4e81bb82006-08-23 22:43:30 -07001080struct xfrm_policy *xfrm_policy_bysel_ctx(u8 type, int dir,
1081 struct xfrm_selector *sel,
Eric Parisef41aaa2007-03-07 15:37:58 -08001082 struct xfrm_sec_ctx *ctx, int delete,
1083 int *err);
1084struct xfrm_policy *xfrm_policy_byid(u8, int dir, u32 id, int delete, int *err);
Joy Latten4aa2e622007-06-04 19:05:57 -04001085int xfrm_policy_flush(u8 type, struct xfrm_audit *audit_info);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001086u32 xfrm_get_acqseq(void);
Herbert Xu658b2192007-10-09 13:29:52 -07001087extern int xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi);
Joy Latten161a09e2006-11-27 13:11:54 -06001088struct xfrm_state * xfrm_find_acq(u8 mode, u32 reqid, u8 proto,
1089 xfrm_address_t *daddr, xfrm_address_t *saddr,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001090 int create, unsigned short family);
Joy Latten4aa2e622007-06-04 19:05:57 -04001091extern int xfrm_policy_flush(u8 type, struct xfrm_audit *audit_info);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001092extern int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol);
Venkat Yekkirala5b368e62006-10-05 15:42:18 -05001093extern int xfrm_bundle_ok(struct xfrm_policy *pol, struct xfrm_dst *xdst,
1094 struct flowi *fl, int family, int strict);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001095extern void xfrm_init_pmtu(struct dst_entry *dst);
1096
Shinta Sugimoto80c9aba2007-02-08 13:11:42 -08001097#ifdef CONFIG_XFRM_MIGRATE
1098extern int km_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
1099 struct xfrm_migrate *m, int num_bundles);
1100extern struct xfrm_state * xfrm_migrate_state_find(struct xfrm_migrate *m);
1101extern struct xfrm_state * xfrm_state_migrate(struct xfrm_state *x,
1102 struct xfrm_migrate *m);
1103extern int xfrm_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
1104 struct xfrm_migrate *m, int num_bundles);
1105#endif
1106
Linus Torvalds1da177e2005-04-16 15:20:36 -07001107extern wait_queue_head_t km_waitq;
Al Viro5d36b182006-11-08 00:24:06 -08001108extern int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport);
Jamal Hadi Salim6c5c8ca2006-03-20 19:17:25 -08001109extern void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 pid);
Masahide NAKAMURA97a64b42006-08-23 20:44:06 -07001110extern int km_report(u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001111
1112extern void xfrm_input_init(void);
Al Viro6067b2b2006-09-27 18:47:59 -07001113extern int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001114
1115extern void xfrm_probe_algs(void);
1116extern int xfrm_count_auth_supported(void);
1117extern int xfrm_count_enc_supported(void);
1118extern struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx);
1119extern struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx);
1120extern struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id);
1121extern struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id);
1122extern struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id);
1123extern struct xfrm_algo_desc *xfrm_aalg_get_byname(char *name, int probe);
1124extern struct xfrm_algo_desc *xfrm_ealg_get_byname(char *name, int probe);
1125extern struct xfrm_algo_desc *xfrm_calg_get_byname(char *name, int probe);
1126
Herbert Xu07d4ee52006-08-20 14:24:50 +10001127struct hash_desc;
Herbert Xu9409f382006-08-06 19:49:12 +10001128struct scatterlist;
Herbert Xu07d4ee52006-08-20 14:24:50 +10001129typedef int (icv_update_fn_t)(struct hash_desc *, struct scatterlist *,
1130 unsigned int);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001131
Herbert Xu07d4ee52006-08-20 14:24:50 +10001132extern int skb_icv_walk(const struct sk_buff *skb, struct hash_desc *tfm,
1133 int offset, int len, icv_update_fn_t icv_update);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001134
1135static inline int xfrm_addr_cmp(xfrm_address_t *a, xfrm_address_t *b,
1136 int family)
1137{
1138 switch (family) {
1139 default:
1140 case AF_INET:
Al Viro8c689a62006-11-08 00:20:21 -08001141 return (__force __u32)a->a4 - (__force __u32)b->a4;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001142 case AF_INET6:
1143 return ipv6_addr_cmp((struct in6_addr *)a,
1144 (struct in6_addr *)b);
1145 }
1146}
1147
Herbert Xu77d8d7a2005-10-05 12:15:12 -07001148static inline int xfrm_policy_id2dir(u32 index)
1149{
1150 return index & 7;
1151}
1152
Jamal Hadi Salimf8cd5482006-03-20 19:15:11 -08001153static inline int xfrm_aevent_is_on(void)
1154{
Patrick McHardybe336902006-03-20 22:40:54 -08001155 struct sock *nlsk;
1156 int ret = 0;
1157
1158 rcu_read_lock();
1159 nlsk = rcu_dereference(xfrm_nl);
1160 if (nlsk)
1161 ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS);
1162 rcu_read_unlock();
1163 return ret;
Jamal Hadi Salimf8cd5482006-03-20 19:15:11 -08001164}
1165
Shinta Sugimoto80c9aba2007-02-08 13:11:42 -08001166#ifdef CONFIG_XFRM_MIGRATE
1167static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig)
1168{
1169 return (struct xfrm_algo *)kmemdup(orig, sizeof(*orig) + orig->alg_key_len, GFP_KERNEL);
1170}
1171
1172static inline void xfrm_states_put(struct xfrm_state **states, int n)
1173{
1174 int i;
1175 for (i = 0; i < n; i++)
1176 xfrm_state_put(*(states + i));
1177}
1178
1179static inline void xfrm_states_delete(struct xfrm_state **states, int n)
1180{
1181 int i;
1182 for (i = 0; i < n; i++)
1183 xfrm_state_delete(*(states + i));
1184}
1185#endif
Jamal Hadi Salimf8cd5482006-03-20 19:15:11 -08001186
Linus Torvalds1da177e2005-04-16 15:20:36 -07001187#endif /* _NET_XFRM_H */