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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>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090015#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070016
17#include <net/sock.h>
18#include <net/dst.h>
Herbert Xu436a0a42007-10-08 17:25:53 -070019#include <net/ip.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070020#include <net/route.h>
21#include <net/ipv6.h>
22#include <net/ip6_fib.h>
Timo Teräsfe1a5f02010-04-07 00:30:04 +000023#include <net/flow.h>
Yury Polyanskiy9e0d57f2009-11-08 20:58:41 -080024
25#include <linux/interrupt.h>
26
Masahide NAKAMURA558f82e2007-12-20 20:42:57 -080027#ifdef CONFIG_XFRM_STATISTICS
28#include <net/snmp.h>
29#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070030
Masahide NAKAMURAd3d6dd32007-06-26 23:57:49 -070031#define XFRM_PROTO_ESP 50
32#define XFRM_PROTO_AH 51
33#define XFRM_PROTO_COMP 108
34#define XFRM_PROTO_IPIP 4
35#define XFRM_PROTO_IPV6 41
36#define XFRM_PROTO_ROUTING IPPROTO_ROUTING
37#define XFRM_PROTO_DSTOPTS IPPROTO_DSTOPTS
38
Nicolas Dichtelfa9921e2011-02-02 06:29:02 +000039#define XFRM_ALIGN4(len) (((len) + 3) & ~3)
Linus Torvalds1da177e2005-04-16 15:20:36 -070040#define XFRM_ALIGN8(len) (((len) + 7) & ~7)
Herbert Xub59f45d2006-05-27 23:05:54 -070041#define MODULE_ALIAS_XFRM_MODE(family, encap) \
42 MODULE_ALIAS("xfrm-mode-" __stringify(family) "-" __stringify(encap))
Masahide NAKAMURAd3d6dd32007-06-26 23:57:49 -070043#define MODULE_ALIAS_XFRM_TYPE(family, proto) \
44 MODULE_ALIAS("xfrm-type-" __stringify(family) "-" __stringify(proto))
Linus Torvalds1da177e2005-04-16 15:20:36 -070045
Masahide NAKAMURA558f82e2007-12-20 20:42:57 -080046#ifdef CONFIG_XFRM_STATISTICS
Alexey Dobriyan59c99402008-11-25 17:59:52 -080047#define XFRM_INC_STATS(net, field) SNMP_INC_STATS((net)->mib.xfrm_statistics, field)
48#define XFRM_INC_STATS_BH(net, field) SNMP_INC_STATS_BH((net)->mib.xfrm_statistics, field)
49#define XFRM_INC_STATS_USER(net, field) SNMP_INC_STATS_USER((net)-mib.xfrm_statistics, field)
Masahide NAKAMURA558f82e2007-12-20 20:42:57 -080050#else
Alexey Dobriyan59c99402008-11-25 17:59:52 -080051#define XFRM_INC_STATS(net, field) ((void)(net))
52#define XFRM_INC_STATS_BH(net, field) ((void)(net))
53#define XFRM_INC_STATS_USER(net, field) ((void)(net))
Masahide NAKAMURA558f82e2007-12-20 20:42:57 -080054#endif
55
Arjan van de Ven4a3e2f72006-03-20 22:33:17 -080056extern struct mutex xfrm_cfg_mutex;
Linus Torvalds1da177e2005-04-16 15:20:36 -070057
58/* Organization of SPD aka "XFRM rules"
59 ------------------------------------
60
61 Basic objects:
62 - policy rule, struct xfrm_policy (=SPD entry)
63 - bundle of transformations, struct dst_entry == struct xfrm_dst (=SA bundle)
64 - instance of a transformer, struct xfrm_state (=SA)
65 - template to clone xfrm_state, struct xfrm_tmpl
66
67 SPD is plain linear list of xfrm_policy rules, ordered by priority.
68 (To be compatible with existing pfkeyv2 implementations,
69 many rules with priority of 0x7fffffff are allowed to exist and
70 such rules are ordered in an unpredictable way, thanks to bsd folks.)
71
72 Lookup is plain linear search until the first match with selector.
73
74 If "action" is "block", then we prohibit the flow, otherwise:
75 if "xfrms_nr" is zero, the flow passes untransformed. Otherwise,
76 policy entry has list of up to XFRM_MAX_DEPTH transformations,
77 described by templates xfrm_tmpl. Each template is resolved
78 to a complete xfrm_state (see below) and we pack bundle of transformations
79 to a dst_entry returned to requestor.
80
81 dst -. xfrm .-> xfrm_state #1
82 |---. child .-> dst -. xfrm .-> xfrm_state #2
83 |---. child .-> dst -. xfrm .-> xfrm_state #3
84 |---. child .-> NULL
85
86 Bundles are cached at xrfm_policy struct (field ->bundles).
87
88
89 Resolution of xrfm_tmpl
90 -----------------------
91 Template contains:
92 1. ->mode Mode: transport or tunnel
93 2. ->id.proto Protocol: AH/ESP/IPCOMP
94 3. ->id.daddr Remote tunnel endpoint, ignored for transport mode.
95 Q: allow to resolve security gateway?
96 4. ->id.spi If not zero, static SPI.
97 5. ->saddr Local tunnel endpoint, ignored for transport mode.
98 6. ->algos List of allowed algos. Plain bitmask now.
99 Q: ealgos, aalgos, calgos. What a mess...
100 7. ->share Sharing mode.
101 Q: how to implement private sharing mode? To add struct sock* to
102 flow id?
103
104 Having this template we search through SAD searching for entries
105 with appropriate mode/proto/algo, permitted by selector.
106 If no appropriate entry found, it is requested from key manager.
107
108 PROBLEMS:
109 Q: How to find all the bundles referring to a physical path for
110 PMTU discovery? Seems, dst should contain list of all parents...
111 and enter to infinite locking hierarchy disaster.
112 No! It is easier, we will not search for them, let them find us.
113 We add genid to each dst plus pointer to genid of raw IP route,
114 pmtu disc will update pmtu on raw IP route and increase its genid.
115 dst_check() will see this for top level and trigger resyncing
116 metrics. Plus, it will be made via sk->sk_dst_cache. Solved.
117 */
118
Herbert Xu12a169e2008-10-01 07:03:24 -0700119struct xfrm_state_walk {
120 struct list_head all;
121 u8 state;
122 union {
123 u8 dying;
124 u8 proto;
125 };
126 u32 seq;
127};
128
Linus Torvalds1da177e2005-04-16 15:20:36 -0700129/* Full description of state of transformer. */
Eric Dumazetfd2c3ef2009-11-03 03:26:03 +0000130struct xfrm_state {
Alexey Dobriyan673c09b2008-11-25 17:15:16 -0800131#ifdef CONFIG_NET_NS
132 struct net *xs_net;
133#endif
Herbert Xuabb81c42008-09-09 19:58:29 -0700134 union {
Herbert Xu12a169e2008-10-01 07:03:24 -0700135 struct hlist_node gclist;
Herbert Xuabb81c42008-09-09 19:58:29 -0700136 struct hlist_node bydst;
137 };
David S. Miller8f126e32006-08-24 02:45:07 -0700138 struct hlist_node bysrc;
139 struct hlist_node byspi;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700140
141 atomic_t refcnt;
142 spinlock_t lock;
143
144 struct xfrm_id id;
145 struct xfrm_selector sel;
Jamal Hadi Salimbf825f812010-02-22 11:32:54 +0000146 struct xfrm_mark mark;
Martin Willi35d28562010-12-08 04:37:49 +0000147 u32 tfcpad;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148
David S. Miller9d4a7062006-08-24 03:18:09 -0700149 u32 genid;
150
Herbert Xu12a169e2008-10-01 07:03:24 -0700151 /* Key manager bits */
152 struct xfrm_state_walk km;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700153
154 /* Parameters of this state. */
155 struct {
156 u32 reqid;
157 u8 mode;
158 u8 replay_window;
159 u8 aalgo, ealgo, calgo;
160 u8 flags;
161 u16 family;
162 xfrm_address_t saddr;
163 int header_len;
164 int trailer_len;
Nicolas Dichtela947b0a2013-02-22 10:54:54 +0100165 u32 extra_flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700166 } props;
167
168 struct xfrm_lifetime_cfg lft;
169
170 /* Data for transformer */
Martin Willi4447bb32009-11-25 00:29:52 +0000171 struct xfrm_algo_auth *aalg;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700172 struct xfrm_algo *ealg;
173 struct xfrm_algo *calg;
Herbert Xu1a6509d2008-01-28 19:37:29 -0800174 struct xfrm_algo_aead *aead;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700175
176 /* Data for encapsulator */
177 struct xfrm_encap_tmpl *encap;
178
Noriaki TAKAMIYA060f02a2006-08-23 18:18:55 -0700179 /* Data for care-of address */
180 xfrm_address_t *coaddr;
181
Linus Torvalds1da177e2005-04-16 15:20:36 -0700182 /* IPComp needs an IPIP tunnel for handling uncompressed packets */
183 struct xfrm_state *tunnel;
184
185 /* If a tunnel, number of users + 1 */
186 atomic_t tunnel_users;
187
188 /* State for replay detection */
189 struct xfrm_replay_state replay;
Steffen Klassert9736acf2011-03-08 00:05:43 +0000190 struct xfrm_replay_state_esn *replay_esn;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700191
Jamal Hadi Salimf8cd5482006-03-20 19:15:11 -0800192 /* Replay detection state at the time we sent the last notification */
193 struct xfrm_replay_state preplay;
Steffen Klassert9736acf2011-03-08 00:05:43 +0000194 struct xfrm_replay_state_esn *preplay_esn;
Jamal Hadi Salimf8cd5482006-03-20 19:15:11 -0800195
Steffen Klassert9fdc4882011-03-08 00:08:32 +0000196 /* The functions for replay detection. */
197 struct xfrm_replay *repl;
198
Jamal Hadi Salim27170962006-04-14 15:03:05 -0700199 /* internal flag that only holds state for delayed aevent at the
200 * moment
201 */
202 u32 xflags;
203
Jamal Hadi Salimf8cd5482006-03-20 19:15:11 -0800204 /* Replay detection notification settings */
205 u32 replay_maxage;
206 u32 replay_maxdiff;
207
208 /* Replay detection notification timer */
209 struct timer_list rtimer;
210
Linus Torvalds1da177e2005-04-16 15:20:36 -0700211 /* Statistics */
212 struct xfrm_stats stats;
213
214 struct xfrm_lifetime_cur curlft;
Yury Polyanskiy9e0d57f2009-11-08 20:58:41 -0800215 struct tasklet_hrtimer mtimer;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700216
Fan Due3c0d042012-07-30 21:43:54 +0000217 /* used to fix curlft->add_time when changing date */
218 long saved_tmo;
219
Masahide NAKAMURA9afaca02006-08-23 18:20:16 -0700220 /* Last used time */
Herbert Xud26f3982007-11-13 21:47:08 -0800221 unsigned long lastused;
Masahide NAKAMURA9afaca02006-08-23 18:20:16 -0700222
Linus Torvalds1da177e2005-04-16 15:20:36 -0700223 /* Reference to data common to all the instances of this
224 * transformer. */
Eric Dumazet533cb5b2008-01-30 19:11:50 -0800225 const struct xfrm_type *type;
Herbert Xu13996372007-10-17 21:35:51 -0700226 struct xfrm_mode *inner_mode;
Kazunori MIYAZAWAdf9dcb42008-03-24 14:51:51 -0700227 struct xfrm_mode *inner_mode_iaf;
Herbert Xu13996372007-10-17 21:35:51 -0700228 struct xfrm_mode *outer_mode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700229
Trent Jaegerdf718372005-12-13 23:12:27 -0800230 /* Security context */
231 struct xfrm_sec_ctx *security;
232
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233 /* Private data of this transformer, format is opaque,
234 * interpreted by xfrm_type methods. */
235 void *data;
236};
237
Alexey Dobriyan673c09b2008-11-25 17:15:16 -0800238static inline struct net *xs_net(struct xfrm_state *x)
239{
240 return read_pnet(&x->xs_net);
241}
242
Jamal Hadi Salim27170962006-04-14 15:03:05 -0700243/* xflags - make enum if more show up */
244#define XFRM_TIME_DEFER 1
Fan Due3c0d042012-07-30 21:43:54 +0000245#define XFRM_SOFT_EXPIRE 2
Jamal Hadi Salim27170962006-04-14 15:03:05 -0700246
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247enum {
248 XFRM_STATE_VOID,
249 XFRM_STATE_ACQ,
250 XFRM_STATE_VALID,
251 XFRM_STATE_ERROR,
252 XFRM_STATE_EXPIRED,
253 XFRM_STATE_DEAD
254};
255
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -0700256/* callback structure passed from either netlink or pfkey */
Eric Dumazetfd2c3ef2009-11-03 03:26:03 +0000257struct km_event {
Herbert Xubf088672005-06-18 22:44:00 -0700258 union {
259 u32 hard;
260 u32 proto;
261 u32 byid;
Jamal Hadi Salimf8cd5482006-03-20 19:15:11 -0800262 u32 aevent;
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -0700263 u32 type;
Herbert Xubf088672005-06-18 22:44:00 -0700264 } data;
265
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -0700266 u32 seq;
Eric W. Biederman15e47302012-09-07 20:12:54 +0000267 u32 portid;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -0700268 u32 event;
Alexey Dobriyan70678022008-11-25 17:50:36 -0800269 struct net *net;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -0700270};
271
Steffen Klassert9fdc4882011-03-08 00:08:32 +0000272struct xfrm_replay {
273 void (*advance)(struct xfrm_state *x, __be32 net_seq);
274 int (*check)(struct xfrm_state *x,
275 struct sk_buff *skb,
276 __be32 net_seq);
Steffen Klassert3b59df42012-09-04 00:03:29 +0000277 int (*recheck)(struct xfrm_state *x,
278 struct sk_buff *skb,
279 __be32 net_seq);
Steffen Klassert9fdc4882011-03-08 00:08:32 +0000280 void (*notify)(struct xfrm_state *x, int event);
281 int (*overflow)(struct xfrm_state *x, struct sk_buff *skb);
282};
283
Herbert Xu25ee3282007-12-11 09:32:34 -0800284struct net_device;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700285struct xfrm_type;
286struct xfrm_dst;
287struct xfrm_policy_afinfo {
288 unsigned short family;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289 struct dst_ops *dst_ops;
Alexey Dobriyanddcfd792008-11-25 17:37:23 -0800290 void (*garbage_collect)(struct net *net);
Alexey Dobriyanc5b3cf42008-11-25 17:51:25 -0800291 struct dst_entry *(*dst_lookup)(struct net *net, int tos,
David S. Miller5e6b9302011-02-24 00:14:45 -0500292 const xfrm_address_t *saddr,
293 const xfrm_address_t *daddr);
Alexey Dobriyanfbda33b2008-11-25 17:56:49 -0800294 int (*get_saddr)(struct net *net, xfrm_address_t *saddr, xfrm_address_t *daddr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700295 void (*decode_session)(struct sk_buff *skb,
Herbert Xud5422ef2007-12-12 10:44:16 -0800296 struct flowi *fl,
297 int reverse);
David S. Miller05d84022011-02-22 17:47:10 -0800298 int (*get_tos)(const struct flowi *fl);
Patrick McHardy9d7b0fc2012-08-20 02:56:56 -0700299 void (*init_dst)(struct net *net,
300 struct xfrm_dst *dst);
Masahide NAKAMURAa1b05142007-12-20 20:41:12 -0800301 int (*init_path)(struct xfrm_dst *path,
302 struct dst_entry *dst,
303 int nfheader_len);
Herbert Xu25ee3282007-12-11 09:32:34 -0800304 int (*fill_dst)(struct xfrm_dst *xdst,
Herbert Xu87c1e122010-03-02 02:51:56 +0000305 struct net_device *dev,
David S. Miller0c7b3ee2011-02-22 17:48:57 -0800306 const struct flowi *fl);
David S. Miller2774c132011-03-01 14:59:04 -0800307 struct dst_entry *(*blackhole_route)(struct net *net, struct dst_entry *orig);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700308};
309
310extern int xfrm_policy_register_afinfo(struct xfrm_policy_afinfo *afinfo);
311extern int xfrm_policy_unregister_afinfo(struct xfrm_policy_afinfo *afinfo);
David S. Miller214e0052011-02-24 00:02:38 -0500312extern void km_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c);
313extern void km_state_notify(struct xfrm_state *x, const struct km_event *c);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700314
315struct xfrm_tmpl;
Jamal Hadi Salim980ebd22006-03-20 19:16:40 -0800316extern int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol);
Eric W. Biederman15e47302012-09-07 20:12:54 +0000317extern void km_state_expired(struct xfrm_state *x, int hard, u32 portid);
Jamal Hadi Salim53bc6b42006-03-20 19:17:03 -0800318extern int __xfrm_state_delete(struct xfrm_state *x);
319
Linus Torvalds1da177e2005-04-16 15:20:36 -0700320struct xfrm_state_afinfo {
Herbert Xu17c2a422007-10-17 21:33:12 -0700321 unsigned int family;
Herbert Xu36cf9ac2007-11-13 21:40:52 -0800322 unsigned int proto;
Al Viro8e3d7162008-03-17 22:49:16 -0700323 __be16 eth_proto;
Herbert Xu17c2a422007-10-17 21:33:12 -0700324 struct module *owner;
Eric Dumazet533cb5b2008-01-30 19:11:50 -0800325 const struct xfrm_type *type_map[IPPROTO_MAX];
Herbert Xuaa5d62c2007-10-17 21:31:12 -0700326 struct xfrm_mode *mode_map[XFRM_MODE_MAX];
Herbert Xud094cd82005-06-20 13:19:41 -0700327 int (*init_flags)(struct xfrm_state *x);
David S. Miller73e5ebb2011-02-22 17:51:44 -0800328 void (*init_tempsel)(struct xfrm_selector *sel,
329 const struct flowi *fl);
David S. Miller19bd6242011-02-24 00:07:20 -0500330 void (*init_temprop)(struct xfrm_state *x,
331 const struct xfrm_tmpl *tmpl,
332 const xfrm_address_t *daddr,
333 const xfrm_address_t *saddr);
Masahide NAKAMURA41a49cc2006-08-23 22:48:31 -0700334 int (*tmpl_sort)(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n);
335 int (*state_sort)(struct xfrm_state **dst, struct xfrm_state **src, int n);
Miika Komucdca7262007-02-06 14:24:56 -0800336 int (*output)(struct sk_buff *skb);
Steffen Klassert43a4dea2011-05-09 19:36:38 +0000337 int (*output_finish)(struct sk_buff *skb);
Herbert Xu227620e2007-11-13 21:41:28 -0800338 int (*extract_input)(struct xfrm_state *x,
339 struct sk_buff *skb);
Herbert Xu36cf9ac2007-11-13 21:40:52 -0800340 int (*extract_output)(struct xfrm_state *x,
341 struct sk_buff *skb);
Herbert Xu716062f2007-11-13 21:44:23 -0800342 int (*transport_finish)(struct sk_buff *skb,
343 int async);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700344};
345
346extern int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo);
347extern int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo);
348
349extern void xfrm_state_delete_tunnel(struct xfrm_state *x);
350
Eric Dumazetfd2c3ef2009-11-03 03:26:03 +0000351struct xfrm_type {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700352 char *description;
353 struct module *owner;
jamala6337462010-02-09 13:21:17 +0000354 u8 proto;
355 u8 flags;
Masahide NAKAMURA1b5c2292006-08-23 18:11:50 -0700356#define XFRM_TYPE_NON_FRAGMENT 1
Herbert Xu436a0a42007-10-08 17:25:53 -0700357#define XFRM_TYPE_REPLAY_PROT 2
Herbert Xuf04e7e82007-11-13 21:36:51 -0800358#define XFRM_TYPE_LOCAL_COADDR 4
359#define XFRM_TYPE_REMOTE_COADDR 8
Linus Torvalds1da177e2005-04-16 15:20:36 -0700360
Herbert Xu72cb6962005-06-20 13:18:08 -0700361 int (*init_state)(struct xfrm_state *x);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700362 void (*destructor)(struct xfrm_state *);
Herbert Xue6956332006-04-01 00:52:46 -0800363 int (*input)(struct xfrm_state *, struct sk_buff *skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700364 int (*output)(struct xfrm_state *, struct sk_buff *pskb);
David S. Miller8f029de2011-02-22 17:59:59 -0800365 int (*reject)(struct xfrm_state *, struct sk_buff *,
366 const struct flowi *);
Masahide NAKAMURAaee5adb2006-08-23 17:57:28 -0700367 int (*hdr_offset)(struct xfrm_state *, struct sk_buff *, u8 **);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700368 /* Estimate maximal size of result of transformation of a dgram */
Patrick McHardyc5c25232007-04-09 11:47:18 -0700369 u32 (*get_mtu)(struct xfrm_state *, int size);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700370};
371
Eric Dumazet533cb5b2008-01-30 19:11:50 -0800372extern int xfrm_register_type(const struct xfrm_type *type, unsigned short family);
373extern int xfrm_unregister_type(const struct xfrm_type *type, unsigned short family);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700374
Herbert Xub59f45d2006-05-27 23:05:54 -0700375struct xfrm_mode {
Herbert Xu227620e2007-11-13 21:41:28 -0800376 /*
377 * Remove encapsulation header.
378 *
379 * The IP header will be moved over the top of the encapsulation
380 * header.
381 *
382 * On entry, the transport header shall point to where the IP header
383 * should be and the network header shall be set to where the IP
384 * header currently is. skb->data shall point to the start of the
385 * payload.
386 */
387 int (*input2)(struct xfrm_state *x, struct sk_buff *skb);
388
389 /*
390 * This is the actual input entry point.
391 *
392 * For transport mode and equivalent this would be identical to
393 * input2 (which does not need to be set). While tunnel mode
394 * and equivalent would set this to the tunnel encapsulation function
395 * xfrm4_prepare_input that would in turn call input2.
396 */
Herbert Xub59f45d2006-05-27 23:05:54 -0700397 int (*input)(struct xfrm_state *x, struct sk_buff *skb);
Herbert Xu37fedd32007-10-10 15:44:44 -0700398
399 /*
400 * Add encapsulation header.
401 *
402 * On exit, the transport header will be set to the start of the
403 * encapsulation header to be filled in by x->type->output and
404 * the mac header will be set to the nextheader (protocol for
405 * IPv4) field of the extension header directly preceding the
406 * encapsulation header, or in its absence, that of the top IP
407 * header. The value of the network header will always point
408 * to the top IP header while skb->data will point to the payload.
409 */
Herbert Xu36cf9ac2007-11-13 21:40:52 -0800410 int (*output2)(struct xfrm_state *x,struct sk_buff *skb);
411
412 /*
413 * This is the actual output entry point.
414 *
415 * For transport mode and equivalent this would be identical to
416 * output2 (which does not need to be set). While tunnel mode
417 * and equivalent would set this to a tunnel encapsulation function
418 * (xfrm4_prepare_output or xfrm6_prepare_output) that would in turn
419 * call output2.
420 */
421 int (*output)(struct xfrm_state *x, struct sk_buff *skb);
Herbert Xub59f45d2006-05-27 23:05:54 -0700422
Herbert Xu17c2a422007-10-17 21:33:12 -0700423 struct xfrm_state_afinfo *afinfo;
Herbert Xub59f45d2006-05-27 23:05:54 -0700424 struct module *owner;
425 unsigned int encap;
Herbert Xu1bfcb102007-10-17 21:31:50 -0700426 int flags;
427};
428
429/* Flags for xfrm_mode. */
430enum {
431 XFRM_MODE_FLAG_TUNNEL = 1,
Herbert Xub59f45d2006-05-27 23:05:54 -0700432};
433
434extern int xfrm_register_mode(struct xfrm_mode *mode, int family);
435extern int xfrm_unregister_mode(struct xfrm_mode *mode, int family);
Herbert Xub59f45d2006-05-27 23:05:54 -0700436
Kazunori MIYAZAWAdf9dcb42008-03-24 14:51:51 -0700437static inline int xfrm_af2proto(unsigned int family)
438{
439 switch(family) {
440 case AF_INET:
441 return IPPROTO_IPIP;
442 case AF_INET6:
443 return IPPROTO_IPV6;
444 default:
445 return 0;
446 }
447}
448
449static inline struct xfrm_mode *xfrm_ip2inner_mode(struct xfrm_state *x, int ipproto)
450{
451 if ((ipproto == IPPROTO_IPIP && x->props.family == AF_INET) ||
452 (ipproto == IPPROTO_IPV6 && x->props.family == AF_INET6))
453 return x->inner_mode;
454 else
455 return x->inner_mode_iaf;
456}
457
Eric Dumazetfd2c3ef2009-11-03 03:26:03 +0000458struct xfrm_tmpl {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700459/* id in template is interpreted as:
460 * daddr - destination of tunnel, may be zero for transport mode.
461 * spi - zero to acquire spi. Not zero if spi is static, then
462 * daddr must be fixed too.
463 * proto - AH/ESP/IPCOMP
464 */
465 struct xfrm_id id;
466
467/* Source address of tunnel. Ignored, if it is not a tunnel. */
468 xfrm_address_t saddr;
469
Miika Komu76b3f052006-11-30 16:40:43 -0800470 unsigned short encap_family;
471
jamala6337462010-02-09 13:21:17 +0000472 u32 reqid;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700473
Masahide NAKAMURA7e49e6d2006-09-22 15:05:15 -0700474/* Mode: transport, tunnel etc. */
jamala6337462010-02-09 13:21:17 +0000475 u8 mode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700476
477/* Sharing mode: unique, this session only, this user only etc. */
jamala6337462010-02-09 13:21:17 +0000478 u8 share;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700479
480/* May skip this transfomration if no SA is found */
jamala6337462010-02-09 13:21:17 +0000481 u8 optional;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700482
Herbert Xuc5d18e92008-04-22 00:46:42 -0700483/* Skip aalgos/ealgos/calgos checks. */
jamala6337462010-02-09 13:21:17 +0000484 u8 allalgs;
Herbert Xuc5d18e92008-04-22 00:46:42 -0700485
Linus Torvalds1da177e2005-04-16 15:20:36 -0700486/* Bit mask of algos allowed for acquisition */
jamala6337462010-02-09 13:21:17 +0000487 u32 aalgos;
488 u32 ealgos;
489 u32 calgos;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700490};
491
Masahide NAKAMURA622dc822006-08-23 17:52:01 -0700492#define XFRM_MAX_DEPTH 6
Linus Torvalds1da177e2005-04-16 15:20:36 -0700493
Herbert Xu12a169e2008-10-01 07:03:24 -0700494struct xfrm_policy_walk_entry {
495 struct list_head all;
496 u8 dead;
497};
498
499struct xfrm_policy_walk {
500 struct xfrm_policy_walk_entry walk;
501 u8 type;
502 u32 seq;
503};
504
Steffen Klasserta0073fe2013-02-05 12:52:55 +0100505struct xfrm_policy_queue {
506 struct sk_buff_head hold_queue;
507 struct timer_list hold_timer;
508 unsigned long timeout;
509};
510
Eric Dumazetfd2c3ef2009-11-03 03:26:03 +0000511struct xfrm_policy {
Alexey Dobriyan0331b1f2008-11-25 17:21:45 -0800512#ifdef CONFIG_NET_NS
513 struct net *xp_net;
514#endif
David S. Miller2518c7c2006-08-24 04:45:07 -0700515 struct hlist_node bydst;
516 struct hlist_node byidx;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700517
518 /* This lock only affects elements except for entry. */
519 rwlock_t lock;
520 atomic_t refcnt;
521 struct timer_list timer;
522
Timo Teräsfe1a5f02010-04-07 00:30:04 +0000523 struct flow_cache_object flo;
Timo Teräs80c802f2010-04-07 00:30:05 +0000524 atomic_t genid;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700525 u32 priority;
526 u32 index;
Jamal Hadi Salimbf825f812010-02-22 11:32:54 +0000527 struct xfrm_mark mark;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700528 struct xfrm_selector selector;
529 struct xfrm_lifetime_cfg lft;
530 struct xfrm_lifetime_cur curlft;
Herbert Xu12a169e2008-10-01 07:03:24 -0700531 struct xfrm_policy_walk_entry walk;
Steffen Klasserta0073fe2013-02-05 12:52:55 +0100532 struct xfrm_policy_queue polq;
Arnaldo Carvalho de Melo46ca5f52006-11-27 17:58:59 -0200533 u8 type;
534 u8 action;
535 u8 flags;
Arnaldo Carvalho de Melo46ca5f52006-11-27 17:58:59 -0200536 u8 xfrm_nr;
Herbert Xu12a169e2008-10-01 07:03:24 -0700537 u16 family;
Trent Jaegerdf718372005-12-13 23:12:27 -0800538 struct xfrm_sec_ctx *security;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700539 struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH];
540};
541
David S. Miller63eb23f2011-02-24 01:25:19 -0500542static inline struct net *xp_net(const struct xfrm_policy *xp)
Alexey Dobriyan0331b1f2008-11-25 17:21:45 -0800543{
544 return read_pnet(&xp->xp_net);
545}
546
Arnaud Ebalard13c1d182008-10-05 13:33:42 -0700547struct xfrm_kmaddress {
548 xfrm_address_t local;
549 xfrm_address_t remote;
550 u32 reserved;
551 u16 family;
552};
553
Shinta Sugimoto80c9aba2007-02-08 13:11:42 -0800554struct xfrm_migrate {
555 xfrm_address_t old_daddr;
556 xfrm_address_t old_saddr;
557 xfrm_address_t new_daddr;
558 xfrm_address_t new_saddr;
559 u8 proto;
560 u8 mode;
561 u16 reserved;
562 u32 reqid;
563 u16 old_family;
564 u16 new_family;
565};
566
Jamal Hadi Salimf8cd5482006-03-20 19:15:11 -0800567#define XFRM_KM_TIMEOUT 30
Jamal Hadi Salimf8cd5482006-03-20 19:15:11 -0800568/* what happened */
569#define XFRM_REPLAY_UPDATE XFRM_AE_CR
570#define XFRM_REPLAY_TIMEOUT XFRM_AE_CE
571
572/* default aevent timeout in units of 100ms */
573#define XFRM_AE_ETIME 10
574/* Async Event timer multiplier */
575#define XFRM_AE_ETH_M 10
576/* default seq threshold size */
577#define XFRM_AE_SEQT_SIZE 2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700578
Eric Dumazetfd2c3ef2009-11-03 03:26:03 +0000579struct xfrm_mgr {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700580 struct list_head list;
581 char *id;
David S. Miller214e0052011-02-24 00:02:38 -0500582 int (*notify)(struct xfrm_state *x, const struct km_event *c);
Fan Du65e07362012-08-15 10:13:47 +0800583 int (*acquire)(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *xp);
Venkat Yekkiralacb969f02006-07-24 23:32:20 -0700584 struct xfrm_policy *(*compile_policy)(struct sock *sk, int opt, u8 *data, int len, int *dir);
Al Viro5d36b182006-11-08 00:24:06 -0800585 int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport);
David S. Miller214e0052011-02-24 00:02:38 -0500586 int (*notify_policy)(struct xfrm_policy *x, int dir, const struct km_event *c);
Alexey Dobriyandb983c12008-11-25 17:51:01 -0800587 int (*report)(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr);
David S. Miller183cad12011-02-24 00:28:01 -0500588 int (*migrate)(const struct xfrm_selector *sel,
589 u8 dir, u8 type,
590 const struct xfrm_migrate *m,
591 int num_bundles,
592 const struct xfrm_kmaddress *k);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700593};
594
595extern int xfrm_register_km(struct xfrm_mgr *km);
596extern int xfrm_unregister_km(struct xfrm_mgr *km);
597
Herbert Xu436a0a42007-10-08 17:25:53 -0700598/*
599 * This structure is used for the duration where packets are being
600 * transformed by IPsec. As soon as the packet leaves IPsec the
601 * area beyond the generic IP part may be overwritten.
602 */
603struct xfrm_skb_cb {
604 union {
605 struct inet_skb_parm h4;
606 struct inet6_skb_parm h6;
607 } header;
608
609 /* Sequence number for replay protection. */
Herbert Xub318e0e2008-02-12 22:50:35 -0800610 union {
Steffen Klassert1ce36442011-03-08 00:06:31 +0000611 struct {
612 __u32 low;
613 __u32 hi;
614 } output;
615 struct {
616 __be32 low;
617 __be32 hi;
618 } input;
Herbert Xub318e0e2008-02-12 22:50:35 -0800619 } seq;
Herbert Xu436a0a42007-10-08 17:25:53 -0700620};
621
622#define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0]))
623
Herbert Xu36cf9ac2007-11-13 21:40:52 -0800624/*
625 * This structure is used by the afinfo prepare_input/prepare_output functions
626 * to transmit header information to the mode input/output functions.
627 */
628struct xfrm_mode_skb_cb {
629 union {
630 struct inet_skb_parm h4;
631 struct inet6_skb_parm h6;
632 } header;
633
634 /* Copied from header for IPv4, always set to zero and DF for IPv6. */
635 __be16 id;
636 __be16 frag_off;
637
Herbert Xu732c8bd2008-03-26 16:51:09 -0700638 /* IP header length (excluding options or extension headers). */
639 u8 ihl;
640
Herbert Xu36cf9ac2007-11-13 21:40:52 -0800641 /* TOS for IPv4, class for IPv6. */
642 u8 tos;
643
644 /* TTL for IPv4, hop limitfor IPv6. */
645 u8 ttl;
646
647 /* Protocol for IPv4, NH for IPv6. */
648 u8 protocol;
649
Herbert Xu732c8bd2008-03-26 16:51:09 -0700650 /* Option length for IPv4, zero for IPv6. */
651 u8 optlen;
652
Herbert Xu36cf9ac2007-11-13 21:40:52 -0800653 /* Used by IPv6 only, zero for IPv4. */
654 u8 flow_lbl[3];
655};
656
657#define XFRM_MODE_SKB_CB(__skb) ((struct xfrm_mode_skb_cb *)&((__skb)->cb[0]))
658
Herbert Xu716062f2007-11-13 21:44:23 -0800659/*
660 * This structure is used by the input processing to locate the SPI and
661 * related information.
662 */
663struct xfrm_spi_skb_cb {
664 union {
665 struct inet_skb_parm h4;
666 struct inet6_skb_parm h6;
667 } header;
668
Herbert Xu716062f2007-11-13 21:44:23 -0800669 unsigned int daddroff;
Herbert Xu2fcb45b2007-12-03 22:54:12 -0800670 unsigned int family;
Herbert Xu716062f2007-11-13 21:44:23 -0800671};
672
673#define XFRM_SPI_SKB_CB(__skb) ((struct xfrm_spi_skb_cb *)&((__skb)->cb[0]))
674
Joy Latten161a09e2006-11-27 13:11:54 -0600675/* Audit Information */
Eric Dumazetfd2c3ef2009-11-03 03:26:03 +0000676struct xfrm_audit {
Joy Latten161a09e2006-11-27 13:11:54 -0600677 u32 secid;
Eric W. Biedermane1760bd2012-09-10 22:39:43 -0700678 kuid_t loginuid;
Eric Paris25323862008-04-18 10:09:25 -0400679 u32 sessionid;
Joy Latten161a09e2006-11-27 13:11:54 -0600680};
Joy Lattenc9204d92006-11-30 15:50:43 -0600681
682#ifdef CONFIG_AUDITSYSCALL
Paul Mooreafeb14b2007-12-21 14:58:11 -0800683static inline struct audit_buffer *xfrm_audit_start(const char *op)
Joy Lattenab5f5e82007-09-17 11:51:22 -0700684{
685 struct audit_buffer *audit_buf = NULL;
Paul Mooreafeb14b2007-12-21 14:58:11 -0800686
687 if (audit_enabled == 0)
688 return NULL;
689 audit_buf = audit_log_start(current->audit_context, GFP_ATOMIC,
690 AUDIT_MAC_IPSEC_EVENT);
691 if (audit_buf == NULL)
692 return NULL;
693 audit_log_format(audit_buf, "op=%s", op);
694 return audit_buf;
695}
696
Eric W. Biedermane1760bd2012-09-10 22:39:43 -0700697static inline void xfrm_audit_helper_usrinfo(kuid_t auid, u32 ses, u32 secid,
Paul Mooreafeb14b2007-12-21 14:58:11 -0800698 struct audit_buffer *audit_buf)
699{
Joy Lattenab5f5e82007-09-17 11:51:22 -0700700 char *secctx;
701 u32 secctx_len;
702
Eric W. Biedermane1760bd2012-09-10 22:39:43 -0700703 audit_log_format(audit_buf, " auid=%u ses=%u",
704 from_kuid(&init_user_ns, auid), ses);
Paul Moore68277ac2007-12-20 20:49:33 -0800705 if (secid != 0 &&
706 security_secid_to_secctx(secid, &secctx, &secctx_len) == 0) {
Joy Lattenab5f5e82007-09-17 11:51:22 -0700707 audit_log_format(audit_buf, " subj=%s", secctx);
708 security_release_secctx(secctx, secctx_len);
709 } else
710 audit_log_task_context(audit_buf);
Joy Lattenab5f5e82007-09-17 11:51:22 -0700711}
712
713extern void xfrm_audit_policy_add(struct xfrm_policy *xp, int result,
Eric W. Biedermane1760bd2012-09-10 22:39:43 -0700714 kuid_t auid, u32 ses, u32 secid);
Joy Lattenab5f5e82007-09-17 11:51:22 -0700715extern void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result,
Eric W. Biedermane1760bd2012-09-10 22:39:43 -0700716 kuid_t auid, u32 ses, u32 secid);
Joy Lattenab5f5e82007-09-17 11:51:22 -0700717extern void xfrm_audit_state_add(struct xfrm_state *x, int result,
Eric W. Biedermane1760bd2012-09-10 22:39:43 -0700718 kuid_t auid, u32 ses, u32 secid);
Joy Lattenab5f5e82007-09-17 11:51:22 -0700719extern void xfrm_audit_state_delete(struct xfrm_state *x, int result,
Eric W. Biedermane1760bd2012-09-10 22:39:43 -0700720 kuid_t auid, u32 ses, u32 secid);
Paul Mooreafeb14b2007-12-21 14:58:11 -0800721extern void xfrm_audit_state_replay_overflow(struct xfrm_state *x,
722 struct sk_buff *skb);
Steffen Klassert9fdc4882011-03-08 00:08:32 +0000723extern void xfrm_audit_state_replay(struct xfrm_state *x,
724 struct sk_buff *skb, __be32 net_seq);
Paul Mooreafeb14b2007-12-21 14:58:11 -0800725extern void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family);
726extern void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family,
727 __be32 net_spi, __be32 net_seq);
728extern void xfrm_audit_state_icvfail(struct xfrm_state *x,
729 struct sk_buff *skb, u8 proto);
Joy Lattenc9204d92006-11-30 15:50:43 -0600730#else
Marcin Slusarz41fef0e2008-05-03 21:03:01 -0700731
732static inline void xfrm_audit_policy_add(struct xfrm_policy *xp, int result,
Eric W. Biedermane1760bd2012-09-10 22:39:43 -0700733 kuid_t auid, u32 ses, u32 secid)
Marcin Slusarz41fef0e2008-05-03 21:03:01 -0700734{
735}
736
737static inline void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result,
Eric W. Biedermane1760bd2012-09-10 22:39:43 -0700738 kuid_t auid, u32 ses, u32 secid)
Marcin Slusarz41fef0e2008-05-03 21:03:01 -0700739{
740}
741
742static inline void xfrm_audit_state_add(struct xfrm_state *x, int result,
Eric W. Biedermane1760bd2012-09-10 22:39:43 -0700743 kuid_t auid, u32 ses, u32 secid)
Marcin Slusarz41fef0e2008-05-03 21:03:01 -0700744{
745}
746
747static inline void xfrm_audit_state_delete(struct xfrm_state *x, int result,
Eric W. Biedermane1760bd2012-09-10 22:39:43 -0700748 kuid_t auid, u32 ses, u32 secid)
Marcin Slusarz41fef0e2008-05-03 21:03:01 -0700749{
750}
751
752static inline void xfrm_audit_state_replay_overflow(struct xfrm_state *x,
753 struct sk_buff *skb)
754{
755}
756
Steffen Klassert9fdc4882011-03-08 00:08:32 +0000757static inline void xfrm_audit_state_replay(struct xfrm_state *x,
758 struct sk_buff *skb, __be32 net_seq)
759{
760}
761
Marcin Slusarz41fef0e2008-05-03 21:03:01 -0700762static inline void xfrm_audit_state_notfound_simple(struct sk_buff *skb,
763 u16 family)
764{
765}
766
767static inline void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family,
768 __be32 net_spi, __be32 net_seq)
769{
770}
771
772static inline void xfrm_audit_state_icvfail(struct xfrm_state *x,
773 struct sk_buff *skb, u8 proto)
774{
775}
Joy Lattenc9204d92006-11-30 15:50:43 -0600776#endif /* CONFIG_AUDITSYSCALL */
Joy Latten161a09e2006-11-27 13:11:54 -0600777
Linus Torvalds1da177e2005-04-16 15:20:36 -0700778static inline void xfrm_pol_hold(struct xfrm_policy *policy)
779{
780 if (likely(policy != NULL))
781 atomic_inc(&policy->refcnt);
782}
783
WANG Cong64c31b32008-01-07 22:34:29 -0800784extern void xfrm_policy_destroy(struct xfrm_policy *policy);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700785
786static inline void xfrm_pol_put(struct xfrm_policy *policy)
787{
788 if (atomic_dec_and_test(&policy->refcnt))
WANG Cong64c31b32008-01-07 22:34:29 -0800789 xfrm_policy_destroy(policy);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700790}
791
Masahide NAKAMURA4e81bb82006-08-23 22:43:30 -0700792static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols)
793{
794 int i;
795 for (i = npols - 1; i >= 0; --i)
796 xfrm_pol_put(pols[i]);
797}
Masahide NAKAMURA4e81bb82006-08-23 22:43:30 -0700798
Linus Torvalds1da177e2005-04-16 15:20:36 -0700799extern void __xfrm_state_destroy(struct xfrm_state *);
800
Herbert Xu21380b82006-02-22 14:47:13 -0800801static inline void __xfrm_state_put(struct xfrm_state *x)
802{
803 atomic_dec(&x->refcnt);
804}
805
Linus Torvalds1da177e2005-04-16 15:20:36 -0700806static inline void xfrm_state_put(struct xfrm_state *x)
807{
808 if (atomic_dec_and_test(&x->refcnt))
809 __xfrm_state_destroy(x);
810}
811
812static inline void xfrm_state_hold(struct xfrm_state *x)
813{
814 atomic_inc(&x->refcnt);
815}
816
David S. Miller1744a8f2011-02-22 18:02:12 -0800817static inline bool addr_match(const void *token1, const void *token2,
818 int prefixlen)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700819{
David S. Miller1744a8f2011-02-22 18:02:12 -0800820 const __be32 *a1 = token1;
821 const __be32 *a2 = token2;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700822 int pdw;
823 int pbi;
824
jamala6337462010-02-09 13:21:17 +0000825 pdw = prefixlen >> 5; /* num of whole u32 in prefix */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700826 pbi = prefixlen & 0x1f; /* num of bits in incomplete u32 in prefix */
827
828 if (pdw)
829 if (memcmp(a1, a2, pdw << 2))
David S. Miller1744a8f2011-02-22 18:02:12 -0800830 return false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700831
832 if (pbi) {
Al Viro5f193432006-09-27 18:46:32 -0700833 __be32 mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700834
835 mask = htonl((0xffffffff) << (32 - pbi));
836
837 if ((a1[pdw] ^ a2[pdw]) & mask)
David S. Miller1744a8f2011-02-22 18:02:12 -0800838 return false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700839 }
840
David S. Miller1744a8f2011-02-22 18:02:12 -0800841 return true;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700842}
843
Alexey Dobriyan26bff942011-11-22 06:46:02 +0000844static inline bool addr4_match(__be32 a1, __be32 a2, u8 prefixlen)
845{
846 /* C99 6.5.7 (3): u32 << 32 is undefined behaviour */
847 if (prefixlen == 0)
848 return true;
849 return !((a1 ^ a2) & htonl(0xFFFFFFFFu << (32 - prefixlen)));
850}
851
Linus Torvalds1da177e2005-04-16 15:20:36 -0700852static __inline__
David S. Miller6281dcc2011-03-12 00:43:55 -0500853__be16 xfrm_flowi_sport(const struct flowi *fl, const union flowi_uli *uli)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700854{
Al Virof9d07e41f82006-09-27 18:45:50 -0700855 __be16 port;
David S. Miller1d28f422011-03-12 00:29:39 -0500856 switch(fl->flowi_proto) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700857 case IPPROTO_TCP:
858 case IPPROTO_UDP:
Gerrit Renkerba4e58e2006-11-27 11:10:57 -0800859 case IPPROTO_UDPLITE:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700860 case IPPROTO_SCTP:
David S. Miller6281dcc2011-03-12 00:43:55 -0500861 port = uli->ports.sport;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700862 break;
863 case IPPROTO_ICMP:
864 case IPPROTO_ICMPV6:
David S. Miller6281dcc2011-03-12 00:43:55 -0500865 port = htons(uli->icmpt.type);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700866 break;
Masahide NAKAMURA2ce42722006-08-23 20:39:03 -0700867 case IPPROTO_MH:
David S. Miller6281dcc2011-03-12 00:43:55 -0500868 port = htons(uli->mht.type);
Masahide NAKAMURA2ce42722006-08-23 20:39:03 -0700869 break;
Timo Teräscc9ff192010-11-03 04:41:38 +0000870 case IPPROTO_GRE:
David S. Miller6281dcc2011-03-12 00:43:55 -0500871 port = htons(ntohl(uli->gre_key) >> 16);
Timo Teräscc9ff192010-11-03 04:41:38 +0000872 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700873 default:
874 port = 0; /*XXX*/
875 }
876 return port;
877}
878
879static __inline__
David S. Miller6281dcc2011-03-12 00:43:55 -0500880__be16 xfrm_flowi_dport(const struct flowi *fl, const union flowi_uli *uli)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700881{
Al Virof9d07e41f82006-09-27 18:45:50 -0700882 __be16 port;
David S. Miller1d28f422011-03-12 00:29:39 -0500883 switch(fl->flowi_proto) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700884 case IPPROTO_TCP:
885 case IPPROTO_UDP:
Gerrit Renkerba4e58e2006-11-27 11:10:57 -0800886 case IPPROTO_UDPLITE:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700887 case IPPROTO_SCTP:
David S. Miller6281dcc2011-03-12 00:43:55 -0500888 port = uli->ports.dport;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700889 break;
890 case IPPROTO_ICMP:
891 case IPPROTO_ICMPV6:
David S. Miller6281dcc2011-03-12 00:43:55 -0500892 port = htons(uli->icmpt.code);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700893 break;
Timo Teräscc9ff192010-11-03 04:41:38 +0000894 case IPPROTO_GRE:
David S. Miller6281dcc2011-03-12 00:43:55 -0500895 port = htons(ntohl(uli->gre_key) & 0xffff);
Timo Teräscc9ff192010-11-03 04:41:38 +0000896 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700897 default:
898 port = 0; /*XXX*/
899 }
900 return port;
901}
902
David S. Millerbc9b35a2012-05-15 15:04:57 -0400903extern bool xfrm_selector_match(const struct xfrm_selector *sel,
904 const struct flowi *fl,
905 unsigned short family);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700906
Trent Jaegerdf718372005-12-13 23:12:27 -0800907#ifdef CONFIG_SECURITY_NETWORK_XFRM
908/* If neither has a context --> match
909 * Otherwise, both must have a context and the sids, doi, alg must match
910 */
David S. Millerbc9b35a2012-05-15 15:04:57 -0400911static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2)
Trent Jaegerdf718372005-12-13 23:12:27 -0800912{
913 return ((!s1 && !s2) ||
914 (s1 && s2 &&
915 (s1->ctx_sid == s2->ctx_sid) &&
916 (s1->ctx_doi == s2->ctx_doi) &&
917 (s1->ctx_alg == s2->ctx_alg)));
918}
919#else
David S. Millerbc9b35a2012-05-15 15:04:57 -0400920static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2)
Trent Jaegerdf718372005-12-13 23:12:27 -0800921{
David S. Millerbc9b35a2012-05-15 15:04:57 -0400922 return true;
Trent Jaegerdf718372005-12-13 23:12:27 -0800923}
924#endif
925
Linus Torvalds1da177e2005-04-16 15:20:36 -0700926/* A struct encoding bundle of transformations to apply to some set of flow.
927 *
928 * dst->child points to the next element of bundle.
929 * dst->xfrm points to an instanse of transformer.
930 *
931 * Due to unfortunate limitations of current routing cache, which we
932 * have no time to fix, it mirrors struct rtable and bound to the same
933 * routing key, including saddr,daddr. However, we can have many of
934 * bundles differing by session id. All the bundles grow from a parent
935 * policy rule.
936 */
Eric Dumazetfd2c3ef2009-11-03 03:26:03 +0000937struct xfrm_dst {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700938 union {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700939 struct dst_entry dst;
940 struct rtable rt;
941 struct rt6_info rt6;
942 } u;
943 struct dst_entry *route;
Timo Teräs80c802f2010-04-07 00:30:05 +0000944 struct flow_cache_object flo;
945 struct xfrm_policy *pols[XFRM_POLICY_TYPE_MAX];
946 int num_pols, num_xfrms;
Masahide NAKAMURA157bfc22007-04-30 00:33:35 -0700947#ifdef CONFIG_XFRM_SUB_POLICY
948 struct flowi *origin;
949 struct xfrm_selector *partner;
950#endif
Timo Teräs80c802f2010-04-07 00:30:05 +0000951 u32 xfrm_genid;
952 u32 policy_genid;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700953 u32 route_mtu_cached;
954 u32 child_mtu_cached;
Hideaki YOSHIFUJI92d63dec2005-05-26 12:58:04 -0700955 u32 route_cookie;
956 u32 path_cookie;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700957};
958
Alexey Dobriyandef8b4f2008-10-28 13:24:06 -0700959#ifdef CONFIG_XFRM
Herbert Xuaabc9762005-05-03 16:27:10 -0700960static inline void xfrm_dst_destroy(struct xfrm_dst *xdst)
961{
Timo Teräs80c802f2010-04-07 00:30:05 +0000962 xfrm_pols_put(xdst->pols, xdst->num_pols);
Herbert Xuaabc9762005-05-03 16:27:10 -0700963 dst_release(xdst->route);
964 if (likely(xdst->u.dst.xfrm))
965 xfrm_state_put(xdst->u.dst.xfrm);
Masahide NAKAMURA157bfc22007-04-30 00:33:35 -0700966#ifdef CONFIG_XFRM_SUB_POLICY
967 kfree(xdst->origin);
968 xdst->origin = NULL;
969 kfree(xdst->partner);
970 xdst->partner = NULL;
971#endif
Herbert Xuaabc9762005-05-03 16:27:10 -0700972}
Alexey Dobriyandef8b4f2008-10-28 13:24:06 -0700973#endif
Herbert Xuaabc9762005-05-03 16:27:10 -0700974
975extern void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev);
976
Eric Dumazetfd2c3ef2009-11-03 03:26:03 +0000977struct sec_path {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700978 atomic_t refcnt;
979 int len;
Herbert Xudbe5b4a2006-04-01 00:54:16 -0800980 struct xfrm_state *xvec[XFRM_MAX_DEPTH];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700981};
982
Michael Smith990078a2011-04-07 04:51:51 +0000983static inline int secpath_exists(struct sk_buff *skb)
984{
985#ifdef CONFIG_XFRM
986 return skb->sp != NULL;
987#else
988 return 0;
989#endif
990}
991
Linus Torvalds1da177e2005-04-16 15:20:36 -0700992static inline struct sec_path *
993secpath_get(struct sec_path *sp)
994{
995 if (sp)
996 atomic_inc(&sp->refcnt);
997 return sp;
998}
999
1000extern void __secpath_destroy(struct sec_path *sp);
1001
1002static inline void
1003secpath_put(struct sec_path *sp)
1004{
1005 if (sp && atomic_dec_and_test(&sp->refcnt))
1006 __secpath_destroy(sp);
1007}
1008
1009extern struct sec_path *secpath_dup(struct sec_path *src);
1010
1011static inline void
1012secpath_reset(struct sk_buff *skb)
1013{
1014#ifdef CONFIG_XFRM
1015 secpath_put(skb->sp);
1016 skb->sp = NULL;
1017#endif
1018}
1019
1020static inline int
David S. Miller6cc32962011-02-24 00:19:59 -05001021xfrm_addr_any(const xfrm_address_t *addr, unsigned short family)
Patrick McHardya1e59ab2006-09-19 12:57:34 -07001022{
1023 switch (family) {
1024 case AF_INET:
1025 return addr->a4 == 0;
1026 case AF_INET6:
1027 return ipv6_addr_any((struct in6_addr *)&addr->a6);
1028 }
1029 return 0;
1030}
1031
1032static inline int
David S. Miller21eddb52011-02-24 01:35:16 -05001033__xfrm4_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001034{
1035 return (tmpl->saddr.a4 &&
1036 tmpl->saddr.a4 != x->props.saddr.a4);
1037}
1038
1039static inline int
David S. Miller21eddb52011-02-24 01:35:16 -05001040__xfrm6_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001041{
1042 return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) &&
YOSHIFUJI Hideaki / 吉藤英明ff88b302013-01-29 12:48:31 +00001043 !ipv6_addr_equal((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001044}
1045
1046static inline int
David S. Miller21eddb52011-02-24 01:35:16 -05001047xfrm_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x, unsigned short family)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001048{
1049 switch (family) {
1050 case AF_INET:
1051 return __xfrm4_state_addr_cmp(tmpl, x);
1052 case AF_INET6:
1053 return __xfrm6_state_addr_cmp(tmpl, x);
1054 }
1055 return !0;
1056}
1057
1058#ifdef CONFIG_XFRM
Linus Torvalds1da177e2005-04-16 15:20:36 -07001059extern int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb, unsigned short family);
1060
Herbert Xud5422ef2007-12-12 10:44:16 -08001061static inline int __xfrm_policy_check2(struct sock *sk, int dir,
1062 struct sk_buff *skb,
1063 unsigned int family, int reverse)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001064{
Alexey Dobriyanf6e1e252008-11-25 17:35:44 -08001065 struct net *net = dev_net(skb->dev);
Herbert Xud5422ef2007-12-12 10:44:16 -08001066 int ndir = dir | (reverse ? XFRM_POLICY_MASK + 1 : 0);
1067
Linus Torvalds1da177e2005-04-16 15:20:36 -07001068 if (sk && sk->sk_policy[XFRM_POLICY_IN])
Herbert Xud5422ef2007-12-12 10:44:16 -08001069 return __xfrm_policy_check(sk, ndir, skb, family);
Masahide NAKAMURA4e81bb82006-08-23 22:43:30 -07001070
Alexey Dobriyanf6e1e252008-11-25 17:35:44 -08001071 return (!net->xfrm.policy_count[dir] && !skb->sp) ||
Eric Dumazetadf30902009-06-02 05:19:30 +00001072 (skb_dst(skb)->flags & DST_NOPOLICY) ||
Herbert Xud5422ef2007-12-12 10:44:16 -08001073 __xfrm_policy_check(sk, ndir, skb, family);
1074}
1075
1076static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family)
1077{
1078 return __xfrm_policy_check2(sk, dir, skb, family, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001079}
1080
1081static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1082{
1083 return xfrm_policy_check(sk, dir, skb, AF_INET);
1084}
1085
1086static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1087{
1088 return xfrm_policy_check(sk, dir, skb, AF_INET6);
1089}
1090
Herbert Xud5422ef2007-12-12 10:44:16 -08001091static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir,
1092 struct sk_buff *skb)
1093{
1094 return __xfrm_policy_check2(sk, dir, skb, AF_INET, 1);
1095}
1096
1097static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir,
1098 struct sk_buff *skb)
1099{
1100 return __xfrm_policy_check2(sk, dir, skb, AF_INET6, 1);
1101}
1102
1103extern int __xfrm_decode_session(struct sk_buff *skb, struct flowi *fl,
1104 unsigned int family, int reverse);
1105
1106static inline int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl,
1107 unsigned int family)
1108{
1109 return __xfrm_decode_session(skb, fl, family, 0);
1110}
1111
1112static inline int xfrm_decode_session_reverse(struct sk_buff *skb,
1113 struct flowi *fl,
1114 unsigned int family)
1115{
1116 return __xfrm_decode_session(skb, fl, family, 1);
1117}
1118
Linus Torvalds1da177e2005-04-16 15:20:36 -07001119extern int __xfrm_route_forward(struct sk_buff *skb, unsigned short family);
1120
1121static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family)
1122{
Alexey Dobriyan99a66652008-11-25 17:36:13 -08001123 struct net *net = dev_net(skb->dev);
1124
1125 return !net->xfrm.policy_count[XFRM_POLICY_OUT] ||
Eric Dumazetadf30902009-06-02 05:19:30 +00001126 (skb_dst(skb)->flags & DST_NOXFRM) ||
Linus Torvalds1da177e2005-04-16 15:20:36 -07001127 __xfrm_route_forward(skb, family);
1128}
1129
1130static inline int xfrm4_route_forward(struct sk_buff *skb)
1131{
1132 return xfrm_route_forward(skb, AF_INET);
1133}
1134
1135static inline int xfrm6_route_forward(struct sk_buff *skb)
1136{
1137 return xfrm_route_forward(skb, AF_INET6);
1138}
1139
1140extern int __xfrm_sk_clone_policy(struct sock *sk);
1141
1142static inline int xfrm_sk_clone_policy(struct sock *sk)
1143{
1144 if (unlikely(sk->sk_policy[0] || sk->sk_policy[1]))
1145 return __xfrm_sk_clone_policy(sk);
1146 return 0;
1147}
1148
Herbert Xu4666faa2005-06-18 22:43:22 -07001149extern int xfrm_policy_delete(struct xfrm_policy *pol, int dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001150
1151static inline void xfrm_sk_free_policy(struct sock *sk)
1152{
1153 if (unlikely(sk->sk_policy[0] != NULL)) {
1154 xfrm_policy_delete(sk->sk_policy[0], XFRM_POLICY_MAX);
1155 sk->sk_policy[0] = NULL;
1156 }
1157 if (unlikely(sk->sk_policy[1] != NULL)) {
1158 xfrm_policy_delete(sk->sk_policy[1], XFRM_POLICY_MAX+1);
1159 sk->sk_policy[1] = NULL;
1160 }
1161}
1162
1163#else
1164
1165static inline void xfrm_sk_free_policy(struct sock *sk) {}
1166static inline int xfrm_sk_clone_policy(struct sock *sk) { return 0; }
1167static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; }
1168static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; }
1169static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1170{
1171 return 1;
1172}
1173static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1174{
1175 return 1;
1176}
1177static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family)
1178{
1179 return 1;
1180}
Herbert Xud5422ef2007-12-12 10:44:16 -08001181static inline int xfrm_decode_session_reverse(struct sk_buff *skb,
1182 struct flowi *fl,
1183 unsigned int family)
1184{
1185 return -ENOSYS;
1186}
1187static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir,
1188 struct sk_buff *skb)
1189{
1190 return 1;
1191}
1192static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir,
1193 struct sk_buff *skb)
1194{
1195 return 1;
1196}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001197#endif
1198
1199static __inline__
David S. Millere8a4e372011-02-22 17:42:56 -08001200xfrm_address_t *xfrm_flowi_daddr(const struct flowi *fl, unsigned short family)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001201{
1202 switch (family){
1203 case AF_INET:
David S. Miller7e1dc7b2011-03-12 02:42:11 -05001204 return (xfrm_address_t *)&fl->u.ip4.daddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001205 case AF_INET6:
David S. Miller7e1dc7b2011-03-12 02:42:11 -05001206 return (xfrm_address_t *)&fl->u.ip6.daddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001207 }
1208 return NULL;
1209}
1210
1211static __inline__
David S. Millere8a4e372011-02-22 17:42:56 -08001212xfrm_address_t *xfrm_flowi_saddr(const struct flowi *fl, unsigned short family)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001213{
1214 switch (family){
1215 case AF_INET:
David S. Miller7e1dc7b2011-03-12 02:42:11 -05001216 return (xfrm_address_t *)&fl->u.ip4.saddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001217 case AF_INET6:
David S. Miller7e1dc7b2011-03-12 02:42:11 -05001218 return (xfrm_address_t *)&fl->u.ip6.saddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001219 }
1220 return NULL;
1221}
1222
YOSHIFUJI Hideaki9bb182a2008-02-22 14:48:22 +09001223static __inline__
David S. Millere8a4e372011-02-22 17:42:56 -08001224void xfrm_flowi_addr_get(const struct flowi *fl,
YOSHIFUJI Hideaki9bb182a2008-02-22 14:48:22 +09001225 xfrm_address_t *saddr, xfrm_address_t *daddr,
1226 unsigned short family)
1227{
1228 switch(family) {
1229 case AF_INET:
David S. Miller7e1dc7b2011-03-12 02:42:11 -05001230 memcpy(&saddr->a4, &fl->u.ip4.saddr, sizeof(saddr->a4));
1231 memcpy(&daddr->a4, &fl->u.ip4.daddr, sizeof(daddr->a4));
YOSHIFUJI Hideaki9bb182a2008-02-22 14:48:22 +09001232 break;
1233 case AF_INET6:
Alexey Dobriyan4e3fd7a2011-11-21 03:39:03 +00001234 *(struct in6_addr *)saddr->a6 = fl->u.ip6.saddr;
1235 *(struct in6_addr *)daddr->a6 = fl->u.ip6.daddr;
YOSHIFUJI Hideaki9bb182a2008-02-22 14:48:22 +09001236 break;
1237 }
1238}
1239
Linus Torvalds1da177e2005-04-16 15:20:36 -07001240static __inline__ int
David S. Millerf8848062011-02-24 01:42:28 -05001241__xfrm4_state_addr_check(const struct xfrm_state *x,
1242 const xfrm_address_t *daddr, const xfrm_address_t *saddr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001243{
1244 if (daddr->a4 == x->id.daddr.a4 &&
1245 (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4))
1246 return 1;
1247 return 0;
1248}
1249
1250static __inline__ int
David S. Millerf8848062011-02-24 01:42:28 -05001251__xfrm6_state_addr_check(const struct xfrm_state *x,
1252 const xfrm_address_t *daddr, const xfrm_address_t *saddr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001253{
YOSHIFUJI Hideaki / 吉藤英明ff88b302013-01-29 12:48:31 +00001254 if (ipv6_addr_equal((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) &&
1255 (ipv6_addr_equal((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr) ||
Linus Torvalds1da177e2005-04-16 15:20:36 -07001256 ipv6_addr_any((struct in6_addr *)saddr) ||
1257 ipv6_addr_any((struct in6_addr *)&x->props.saddr)))
1258 return 1;
1259 return 0;
1260}
1261
1262static __inline__ int
David S. Millerf8848062011-02-24 01:42:28 -05001263xfrm_state_addr_check(const struct xfrm_state *x,
1264 const xfrm_address_t *daddr, const xfrm_address_t *saddr,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001265 unsigned short family)
1266{
1267 switch (family) {
1268 case AF_INET:
1269 return __xfrm4_state_addr_check(x, daddr, saddr);
1270 case AF_INET6:
1271 return __xfrm6_state_addr_check(x, daddr, saddr);
1272 }
1273 return 0;
1274}
1275
Masahide NAKAMURAe53820d2006-08-23 19:12:01 -07001276static __inline__ int
David S. Millerf8848062011-02-24 01:42:28 -05001277xfrm_state_addr_flow_check(const struct xfrm_state *x, const struct flowi *fl,
Masahide NAKAMURAe53820d2006-08-23 19:12:01 -07001278 unsigned short family)
1279{
1280 switch (family) {
1281 case AF_INET:
1282 return __xfrm4_state_addr_check(x,
David S. Miller7e1dc7b2011-03-12 02:42:11 -05001283 (const xfrm_address_t *)&fl->u.ip4.daddr,
1284 (const xfrm_address_t *)&fl->u.ip4.saddr);
Masahide NAKAMURAe53820d2006-08-23 19:12:01 -07001285 case AF_INET6:
1286 return __xfrm6_state_addr_check(x,
David S. Miller7e1dc7b2011-03-12 02:42:11 -05001287 (const xfrm_address_t *)&fl->u.ip6.daddr,
1288 (const xfrm_address_t *)&fl->u.ip6.saddr);
Masahide NAKAMURAe53820d2006-08-23 19:12:01 -07001289 }
1290 return 0;
1291}
1292
David S. Millerf8848062011-02-24 01:42:28 -05001293static inline int xfrm_state_kern(const struct xfrm_state *x)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001294{
1295 return atomic_read(&x->tunnel_users);
1296}
1297
Masahide NAKAMURA57947082006-09-22 15:06:24 -07001298static inline int xfrm_id_proto_match(u8 proto, u8 userproto)
1299{
Masahide NAKAMURAdc00a522006-08-23 17:49:52 -07001300 return (!userproto || proto == userproto ||
1301 (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH ||
1302 proto == IPPROTO_ESP ||
1303 proto == IPPROTO_COMP)));
Masahide NAKAMURA57947082006-09-22 15:06:24 -07001304}
1305
Linus Torvalds1da177e2005-04-16 15:20:36 -07001306/*
1307 * xfrm algorithm information
1308 */
Herbert Xu1a6509d2008-01-28 19:37:29 -08001309struct xfrm_algo_aead_info {
1310 u16 icv_truncbits;
1311};
1312
Linus Torvalds1da177e2005-04-16 15:20:36 -07001313struct xfrm_algo_auth_info {
1314 u16 icv_truncbits;
1315 u16 icv_fullbits;
1316};
1317
1318struct xfrm_algo_encr_info {
1319 u16 blockbits;
1320 u16 defkeybits;
1321};
1322
1323struct xfrm_algo_comp_info {
1324 u16 threshold;
1325};
1326
1327struct xfrm_algo_desc {
1328 char *name;
Herbert Xu04ff1262006-08-13 08:50:00 +10001329 char *compat;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001330 u8 available:1;
Jussi Kivilinna7e50f842013-01-31 12:40:38 +02001331 u8 pfkey_supported:1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001332 union {
Herbert Xu1a6509d2008-01-28 19:37:29 -08001333 struct xfrm_algo_aead_info aead;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001334 struct xfrm_algo_auth_info auth;
1335 struct xfrm_algo_encr_info encr;
1336 struct xfrm_algo_comp_info comp;
1337 } uinfo;
1338 struct sadb_alg desc;
1339};
1340
1341/* XFRM tunnel handlers. */
1342struct xfrm_tunnel {
1343 int (*handler)(struct sk_buff *skb);
jamala6337462010-02-09 13:21:17 +00001344 int (*err_handler)(struct sk_buff *skb, u32 info);
Herbert Xud2acc342006-03-28 01:12:13 -08001345
Eric Dumazetb33eab02010-10-25 21:01:26 +00001346 struct xfrm_tunnel __rcu *next;
Herbert Xud2acc342006-03-28 01:12:13 -08001347 int priority;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001348};
1349
1350struct xfrm6_tunnel {
Herbert Xud2acc342006-03-28 01:12:13 -08001351 int (*handler)(struct sk_buff *skb);
1352 int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt,
Brian Haleyd5fdd6b2009-06-23 04:31:07 -07001353 u8 type, u8 code, int offset, __be32 info);
Eric Dumazet6f0bcf12010-10-24 21:33:16 +00001354 struct xfrm6_tunnel __rcu *next;
Herbert Xud2acc342006-03-28 01:12:13 -08001355 int priority;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001356};
1357
1358extern void xfrm_init(void);
Steffen Klassert703fb942012-11-13 08:52:24 +01001359extern void xfrm4_init(void);
Alexey Dobriyand62ddc22008-11-25 17:14:31 -08001360extern int xfrm_state_init(struct net *net);
1361extern void xfrm_state_fini(struct net *net);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001362extern void xfrm4_state_init(void);
Daniel Lezcanoc35b7e72007-12-08 00:14:11 -08001363#ifdef CONFIG_XFRM
1364extern int xfrm6_init(void);
1365extern void xfrm6_fini(void);
Daniel Lezcano0013cab2007-12-07 00:42:11 -08001366extern int xfrm6_state_init(void);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001367extern void xfrm6_state_fini(void);
Daniel Lezcanoc35b7e72007-12-08 00:14:11 -08001368#else
1369static inline int xfrm6_init(void)
1370{
1371 return 0;
1372}
1373static inline void xfrm6_fini(void)
1374{
1375 ;
1376}
1377#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001378
Masahide NAKAMURA558f82e2007-12-20 20:42:57 -08001379#ifdef CONFIG_XFRM_STATISTICS
Alexey Dobriyanc68cd1a2008-11-25 18:00:14 -08001380extern int xfrm_proc_init(struct net *net);
1381extern void xfrm_proc_fini(struct net *net);
Masahide NAKAMURA558f82e2007-12-20 20:42:57 -08001382#endif
1383
Alexey Dobriyanb27aead2008-11-25 18:00:48 -08001384extern int xfrm_sysctl_init(struct net *net);
1385#ifdef CONFIG_SYSCTL
1386extern void xfrm_sysctl_fini(struct net *net);
1387#else
1388static inline void xfrm_sysctl_fini(struct net *net)
1389{
1390}
1391#endif
1392
Herbert Xu5c182452008-09-22 19:48:19 -07001393extern void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto);
Alexey Dobriyan284fa7d2008-11-25 17:32:14 -08001394extern int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk,
Timo Teras4c563f72008-02-28 21:31:08 -08001395 int (*func)(struct xfrm_state *, int, void*), void *);
Herbert Xuabb81c42008-09-09 19:58:29 -07001396extern void xfrm_state_walk_done(struct xfrm_state_walk *walk);
Alexey Dobriyan673c09b2008-11-25 17:15:16 -08001397extern struct xfrm_state *xfrm_state_alloc(struct net *net);
David S. Miller33765d02011-02-24 01:55:45 -05001398extern struct xfrm_state *xfrm_state_find(const xfrm_address_t *daddr,
1399 const xfrm_address_t *saddr,
David S. Millerb520e9f2011-02-22 18:24:19 -08001400 const struct flowi *fl,
1401 struct xfrm_tmpl *tmpl,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001402 struct xfrm_policy *pol, int *err,
1403 unsigned short family);
Jamal Hadi Salimbd557752010-02-22 16:20:22 -08001404extern struct xfrm_state *xfrm_stateonly_find(struct net *net, u32 mark,
Alexey Dobriyan5447c5e2008-11-25 17:31:51 -08001405 xfrm_address_t *daddr,
Jamal Hadi Salim628529b2007-07-02 22:41:14 -07001406 xfrm_address_t *saddr,
1407 unsigned short family,
1408 u8 mode, u8 proto, u32 reqid);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001409extern int xfrm_state_check_expire(struct xfrm_state *x);
1410extern void xfrm_state_insert(struct xfrm_state *x);
1411extern int xfrm_state_add(struct xfrm_state *x);
1412extern int xfrm_state_update(struct xfrm_state *x);
Jamal Hadi Salimbd557752010-02-22 16:20:22 -08001413extern struct xfrm_state *xfrm_state_lookup(struct net *net, u32 mark,
David S. Millera70486f2011-02-27 23:17:24 -08001414 const xfrm_address_t *daddr, __be32 spi,
Jamal Hadi Salimbd557752010-02-22 16:20:22 -08001415 u8 proto, unsigned short family);
1416extern struct xfrm_state *xfrm_state_lookup_byaddr(struct net *net, u32 mark,
David S. Millera70486f2011-02-27 23:17:24 -08001417 const xfrm_address_t *daddr,
1418 const xfrm_address_t *saddr,
Jamal Hadi Salimbd557752010-02-22 16:20:22 -08001419 u8 proto,
1420 unsigned short family);
Masahide NAKAMURA41a49cc2006-08-23 22:48:31 -07001421#ifdef CONFIG_XFRM_SUB_POLICY
1422extern int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src,
1423 int n, unsigned short family);
1424extern int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src,
1425 int n, unsigned short family);
1426#else
1427static inline int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src,
1428 int n, unsigned short family)
1429{
1430 return -ENOSYS;
1431}
1432
1433static inline int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src,
1434 int n, unsigned short family)
1435{
1436 return -ENOSYS;
1437}
1438#endif
Jamal Hadi Salimaf11e312007-05-04 12:55:13 -07001439
1440struct xfrmk_sadinfo {
1441 u32 sadhcnt; /* current hash bkts */
1442 u32 sadhmcnt; /* max allowed hash bkts */
1443 u32 sadcnt; /* current running count */
1444};
1445
Jamal Hadi Salim5a6d3412007-05-04 12:55:39 -07001446struct xfrmk_spdinfo {
1447 u32 incnt;
1448 u32 outcnt;
1449 u32 fwdcnt;
1450 u32 inscnt;
1451 u32 outscnt;
1452 u32 fwdscnt;
1453 u32 spdhcnt;
1454 u32 spdhmcnt;
1455};
1456
Jamal Hadi Salimbd557752010-02-22 16:20:22 -08001457extern struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark,
1458 u32 seq);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001459extern int xfrm_state_delete(struct xfrm_state *x);
Alexey Dobriyan0e602452008-11-25 17:30:18 -08001460extern int xfrm_state_flush(struct net *net, u8 proto, struct xfrm_audit *audit_info);
Alexey Dobriyane0710412010-01-23 13:37:10 +00001461extern void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si);
1462extern void xfrm_spd_getinfo(struct net *net, struct xfrmk_spdinfo *si);
Steffen Klassert2cd08462011-03-08 00:09:51 +00001463extern u32 xfrm_replay_seqhi(struct xfrm_state *x, __be32 net_seq);
Steffen Klassert9fdc4882011-03-08 00:08:32 +00001464extern int xfrm_init_replay(struct xfrm_state *x);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001465extern int xfrm_state_mtu(struct xfrm_state *x, int mtu);
Wei Yongjuna454f0c2011-03-21 18:08:28 -07001466extern int __xfrm_init_state(struct xfrm_state *x, bool init_replay);
Herbert Xu72cb6962005-06-20 13:18:08 -07001467extern int xfrm_init_state(struct xfrm_state *x);
Herbert Xu227620e2007-11-13 21:41:28 -08001468extern int xfrm_prepare_input(struct xfrm_state *x, struct sk_buff *skb);
Herbert Xu716062f2007-11-13 21:44:23 -08001469extern int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi,
1470 int encap_type);
Herbert Xu1bf06cd2007-11-19 18:50:17 -08001471extern int xfrm_input_resume(struct sk_buff *skb, int nexthdr);
Herbert Xuc6581a42007-11-13 21:43:43 -08001472extern int xfrm_output_resume(struct sk_buff *skb, int err);
Herbert Xu406ef772007-10-08 17:16:30 -07001473extern int xfrm_output(struct sk_buff *skb);
Kazunori MIYAZAWAdf9dcb42008-03-24 14:51:51 -07001474extern int xfrm_inner_extract_output(struct xfrm_state *x, struct sk_buff *skb);
Herbert Xu36cf9ac2007-11-13 21:40:52 -08001475extern int xfrm4_extract_header(struct sk_buff *skb);
Herbert Xu227620e2007-11-13 21:41:28 -08001476extern int xfrm4_extract_input(struct xfrm_state *x, struct sk_buff *skb);
Herbert Xuc4541b42007-10-17 21:28:53 -07001477extern int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi,
1478 int encap_type);
Herbert Xu716062f2007-11-13 21:44:23 -08001479extern int xfrm4_transport_finish(struct sk_buff *skb, int async);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001480extern int xfrm4_rcv(struct sk_buff *skb);
Herbert Xuc4541b42007-10-17 21:28:53 -07001481
1482static inline int xfrm4_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi)
1483{
1484 return xfrm4_rcv_encap(skb, nexthdr, spi, 0);
1485}
1486
Herbert Xu36cf9ac2007-11-13 21:40:52 -08001487extern int xfrm4_extract_output(struct xfrm_state *x, struct sk_buff *skb);
1488extern int xfrm4_prepare_output(struct xfrm_state *x, struct sk_buff *skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001489extern int xfrm4_output(struct sk_buff *skb);
Steffen Klassert43a4dea2011-05-09 19:36:38 +00001490extern int xfrm4_output_finish(struct sk_buff *skb);
Kazunori MIYAZAWAc0d56402007-02-13 12:54:47 -08001491extern int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family);
1492extern int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family);
Saurabheb8637c2012-07-17 09:44:49 +00001493extern int xfrm4_mode_tunnel_input_register(struct xfrm_tunnel *handler);
1494extern int xfrm4_mode_tunnel_input_deregister(struct xfrm_tunnel *handler);
Herbert Xu36cf9ac2007-11-13 21:40:52 -08001495extern int xfrm6_extract_header(struct sk_buff *skb);
Herbert Xu227620e2007-11-13 21:41:28 -08001496extern int xfrm6_extract_input(struct xfrm_state *x, struct sk_buff *skb);
Herbert Xu33b5ecb2007-10-17 21:29:25 -07001497extern int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi);
Herbert Xu716062f2007-11-13 21:44:23 -08001498extern int xfrm6_transport_finish(struct sk_buff *skb, int async);
Herbert Xue5bbef22007-10-15 12:50:28 -07001499extern int xfrm6_rcv(struct sk_buff *skb);
Masahide NAKAMURAfbd9a5b2006-08-23 18:08:21 -07001500extern int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr,
1501 xfrm_address_t *saddr, u8 proto);
Kazunori MIYAZAWA73d605d2007-02-13 12:55:55 -08001502extern int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family);
1503extern int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family);
Alexey Dobriyana1664772010-01-25 10:37:54 +00001504extern __be32 xfrm6_tunnel_alloc_spi(struct net *net, xfrm_address_t *saddr);
Eric Dumazetb71d1d42011-04-22 04:53:02 +00001505extern __be32 xfrm6_tunnel_spi_lookup(struct net *net, const xfrm_address_t *saddr);
Herbert Xu36cf9ac2007-11-13 21:40:52 -08001506extern int xfrm6_extract_output(struct xfrm_state *x, struct sk_buff *skb);
1507extern int xfrm6_prepare_output(struct xfrm_state *x, struct sk_buff *skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001508extern int xfrm6_output(struct sk_buff *skb);
Steffen Klassert43a4dea2011-05-09 19:36:38 +00001509extern int xfrm6_output_finish(struct sk_buff *skb);
Masahide NAKAMURAaee5adb2006-08-23 17:57:28 -07001510extern int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb,
1511 u8 **prevhdr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001512
1513#ifdef CONFIG_XFRM
James Chapman067b2072007-07-05 17:08:05 -07001514extern int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001515extern int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001516#else
1517static inline int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen)
1518{
1519 return -ENOPROTOOPT;
1520}
1521
James Chapman067b2072007-07-05 17:08:05 -07001522static inline int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001523{
1524 /* should not happen */
1525 kfree_skb(skb);
1526 return 0;
1527}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001528#endif
1529
Alexey Dobriyan0331b1f2008-11-25 17:21:45 -08001530struct xfrm_policy *xfrm_policy_alloc(struct net *net, gfp_t gfp);
Timo Teras4c563f72008-02-28 21:31:08 -08001531
Herbert Xu12a169e2008-10-01 07:03:24 -07001532extern void xfrm_policy_walk_init(struct xfrm_policy_walk *walk, u8 type);
Alexey Dobriyancdcbca72008-11-25 17:34:49 -08001533extern int xfrm_policy_walk(struct net *net, struct xfrm_policy_walk *walk,
Timo Teras4c563f72008-02-28 21:31:08 -08001534 int (*func)(struct xfrm_policy *, int, int, void*), void *);
Herbert Xu12a169e2008-10-01 07:03:24 -07001535extern void xfrm_policy_walk_done(struct xfrm_policy_walk *walk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001536int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl);
Jamal Hadi Salim8ca2e932010-02-22 11:32:57 +00001537struct xfrm_policy *xfrm_policy_bysel_ctx(struct net *net, u32 mark,
1538 u8 type, int dir,
Masahide NAKAMURA4e81bb82006-08-23 22:43:30 -07001539 struct xfrm_selector *sel,
Eric Parisef41aaa2007-03-07 15:37:58 -08001540 struct xfrm_sec_ctx *ctx, int delete,
1541 int *err);
Jamal Hadi Salim8ca2e932010-02-22 11:32:57 +00001542struct xfrm_policy *xfrm_policy_byid(struct net *net, u32 mark, u8, int dir, u32 id, int delete, int *err);
Alexey Dobriyan33ffbbd2008-11-25 17:33:32 -08001543int xfrm_policy_flush(struct net *net, u8 type, struct xfrm_audit *audit_info);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001544u32 xfrm_get_acqseq(void);
Herbert Xu658b2192007-10-09 13:29:52 -07001545extern int xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi);
Jamal Hadi Salimbd557752010-02-22 16:20:22 -08001546struct xfrm_state *xfrm_find_acq(struct net *net, struct xfrm_mark *mark,
1547 u8 mode, u32 reqid, u8 proto,
David S. Millera70486f2011-02-27 23:17:24 -08001548 const xfrm_address_t *daddr,
1549 const xfrm_address_t *saddr, int create,
Jamal Hadi Salimbd557752010-02-22 16:20:22 -08001550 unsigned short family);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001551extern int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001552
Shinta Sugimoto80c9aba2007-02-08 13:11:42 -08001553#ifdef CONFIG_XFRM_MIGRATE
David S. Miller183cad12011-02-24 00:28:01 -05001554extern int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
1555 const struct xfrm_migrate *m, int num_bundles,
1556 const struct xfrm_kmaddress *k);
Shinta Sugimoto80c9aba2007-02-08 13:11:42 -08001557extern struct xfrm_state * xfrm_migrate_state_find(struct xfrm_migrate *m);
1558extern struct xfrm_state * xfrm_state_migrate(struct xfrm_state *x,
1559 struct xfrm_migrate *m);
David S. Millerb4b7c0b2011-02-24 00:35:06 -05001560extern int xfrm_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
Arnaud Ebalard13c1d182008-10-05 13:33:42 -07001561 struct xfrm_migrate *m, int num_bundles,
1562 struct xfrm_kmaddress *k);
Shinta Sugimoto80c9aba2007-02-08 13:11:42 -08001563#endif
1564
Al Viro5d36b182006-11-08 00:24:06 -08001565extern int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport);
Eric W. Biederman15e47302012-09-07 20:12:54 +00001566extern void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 portid);
Alexey Dobriyandb983c12008-11-25 17:51:01 -08001567extern int km_report(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001568
1569extern void xfrm_input_init(void);
Al Viro6067b2b2006-09-27 18:47:59 -07001570extern int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001571
1572extern void xfrm_probe_algs(void);
Jussi Kivilinna7e50f842013-01-31 12:40:38 +02001573extern int xfrm_count_pfkey_auth_supported(void);
1574extern int xfrm_count_pfkey_enc_supported(void);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001575extern struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx);
1576extern struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx);
1577extern struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id);
1578extern struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id);
1579extern struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id);
David S. Miller6f2f19e2011-02-27 23:04:45 -08001580extern struct xfrm_algo_desc *xfrm_aalg_get_byname(const char *name, int probe);
1581extern struct xfrm_algo_desc *xfrm_ealg_get_byname(const char *name, int probe);
1582extern struct xfrm_algo_desc *xfrm_calg_get_byname(const char *name, int probe);
1583extern struct xfrm_algo_desc *xfrm_aead_get_byname(const char *name, int icv_len,
Herbert Xu1a6509d2008-01-28 19:37:29 -08001584 int probe);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001585
YOSHIFUJI Hideaki / 吉藤英明ff88b302013-01-29 12:48:31 +00001586static inline bool xfrm6_addr_equal(const xfrm_address_t *a,
1587 const xfrm_address_t *b)
1588{
1589 return ipv6_addr_equal((const struct in6_addr *)a,
1590 (const struct in6_addr *)b);
1591}
1592
YOSHIFUJI Hideaki / 吉藤英明70e94e62013-01-29 12:48:50 +00001593static inline bool xfrm_addr_equal(const xfrm_address_t *a,
1594 const xfrm_address_t *b,
1595 sa_family_t family)
1596{
1597 switch (family) {
1598 default:
1599 case AF_INET:
1600 return ((__force u32)a->a4 ^ (__force u32)b->a4) == 0;
1601 case AF_INET6:
1602 return xfrm6_addr_equal(a, b);
1603 }
1604}
1605
Herbert Xu77d8d7a2005-10-05 12:15:12 -07001606static inline int xfrm_policy_id2dir(u32 index)
1607{
1608 return index & 7;
1609}
1610
Alexey Dobriyana6483b72008-11-25 17:38:20 -08001611#ifdef CONFIG_XFRM
1612static inline int xfrm_aevent_is_on(struct net *net)
Jamal Hadi Salimf8cd5482006-03-20 19:15:11 -08001613{
Patrick McHardybe336902006-03-20 22:40:54 -08001614 struct sock *nlsk;
1615 int ret = 0;
1616
1617 rcu_read_lock();
Alexey Dobriyana6483b72008-11-25 17:38:20 -08001618 nlsk = rcu_dereference(net->xfrm.nlsk);
Patrick McHardybe336902006-03-20 22:40:54 -08001619 if (nlsk)
1620 ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS);
1621 rcu_read_unlock();
1622 return ret;
Jamal Hadi Salimf8cd5482006-03-20 19:15:11 -08001623}
Alexey Dobriyana6483b72008-11-25 17:38:20 -08001624#endif
Jamal Hadi Salimf8cd5482006-03-20 19:15:11 -08001625
David S. Miller85158622011-02-27 23:07:02 -08001626static inline int xfrm_alg_len(const struct xfrm_algo *alg)
Eric Dumazet0f99be02008-01-08 23:39:06 -08001627{
1628 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1629}
1630
David S. Miller85158622011-02-27 23:07:02 -08001631static inline int xfrm_alg_auth_len(const struct xfrm_algo_auth *alg)
Martin Willi4447bb32009-11-25 00:29:52 +00001632{
1633 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1634}
1635
Steffen Klassert9736acf2011-03-08 00:05:43 +00001636static inline int xfrm_replay_state_esn_len(struct xfrm_replay_state_esn *replay_esn)
1637{
1638 return sizeof(*replay_esn) + replay_esn->bmp_len * sizeof(__u32);
1639}
1640
Shinta Sugimoto80c9aba2007-02-08 13:11:42 -08001641#ifdef CONFIG_XFRM_MIGRATE
Steffen Klassertaf2f4642011-03-28 19:46:39 +00001642static inline int xfrm_replay_clone(struct xfrm_state *x,
1643 struct xfrm_state *orig)
1644{
1645 x->replay_esn = kzalloc(xfrm_replay_state_esn_len(orig->replay_esn),
1646 GFP_KERNEL);
1647 if (!x->replay_esn)
1648 return -ENOMEM;
1649
1650 x->replay_esn->bmp_len = orig->replay_esn->bmp_len;
1651 x->replay_esn->replay_window = orig->replay_esn->replay_window;
1652
1653 x->preplay_esn = kmemdup(x->replay_esn,
1654 xfrm_replay_state_esn_len(x->replay_esn),
1655 GFP_KERNEL);
1656 if (!x->preplay_esn) {
1657 kfree(x->replay_esn);
1658 return -ENOMEM;
1659 }
1660
1661 return 0;
1662}
1663
Shinta Sugimoto80c9aba2007-02-08 13:11:42 -08001664static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig)
1665{
Eric Dumazet0f99be02008-01-08 23:39:06 -08001666 return kmemdup(orig, xfrm_alg_len(orig), GFP_KERNEL);
Shinta Sugimoto80c9aba2007-02-08 13:11:42 -08001667}
1668
Martin Willi4447bb32009-11-25 00:29:52 +00001669static inline struct xfrm_algo_auth *xfrm_algo_auth_clone(struct xfrm_algo_auth *orig)
1670{
1671 return kmemdup(orig, xfrm_alg_auth_len(orig), GFP_KERNEL);
1672}
1673
Shinta Sugimoto80c9aba2007-02-08 13:11:42 -08001674static inline void xfrm_states_put(struct xfrm_state **states, int n)
1675{
1676 int i;
1677 for (i = 0; i < n; i++)
1678 xfrm_state_put(*(states + i));
1679}
1680
1681static inline void xfrm_states_delete(struct xfrm_state **states, int n)
1682{
1683 int i;
1684 for (i = 0; i < n; i++)
1685 xfrm_state_delete(*(states + i));
1686}
1687#endif
Jamal Hadi Salimf8cd5482006-03-20 19:15:11 -08001688
Alexey Dobriyandef8b4f2008-10-28 13:24:06 -07001689#ifdef CONFIG_XFRM
Herbert Xu00501122007-12-11 01:53:43 -08001690static inline struct xfrm_state *xfrm_input_state(struct sk_buff *skb)
1691{
1692 return skb->sp->xvec[skb->sp->len - 1];
1693}
Alexey Dobriyandef8b4f2008-10-28 13:24:06 -07001694#endif
Herbert Xu00501122007-12-11 01:53:43 -08001695
Jamal Hadi Salimbf825f812010-02-22 11:32:54 +00001696static inline int xfrm_mark_get(struct nlattr **attrs, struct xfrm_mark *m)
1697{
1698 if (attrs[XFRMA_MARK])
Andreas Steffen4efd7e82010-06-30 10:41:15 -07001699 memcpy(m, nla_data(attrs[XFRMA_MARK]), sizeof(struct xfrm_mark));
Jamal Hadi Salimbf825f812010-02-22 11:32:54 +00001700 else
1701 m->v = m->m = 0;
1702
1703 return m->v & m->m;
1704}
1705
David S. Millere3dfa382011-02-27 23:20:19 -08001706static inline int xfrm_mark_put(struct sk_buff *skb, const struct xfrm_mark *m)
Jamal Hadi Salimbf825f812010-02-22 11:32:54 +00001707{
David S. Miller1d1e34d2012-06-27 21:57:03 -07001708 int ret = 0;
Jamal Hadi Salimbf825f812010-02-22 11:32:54 +00001709
David S. Miller1d1e34d2012-06-27 21:57:03 -07001710 if (m->m | m->v)
1711 ret = nla_put(skb, XFRMA_MARK, sizeof(struct xfrm_mark), m);
1712 return ret;
Jamal Hadi Salimbf825f812010-02-22 11:32:54 +00001713}
1714
Linus Torvalds1da177e2005-04-16 15:20:36 -07001715#endif /* _NET_XFRM_H */