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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 Salimbf825f82010-02-22 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;
165 } props;
166
167 struct xfrm_lifetime_cfg lft;
168
169 /* Data for transformer */
Martin Willi4447bb32009-11-25 00:29:52 +0000170 struct xfrm_algo_auth *aalg;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700171 struct xfrm_algo *ealg;
172 struct xfrm_algo *calg;
Herbert Xu1a6509d2008-01-28 19:37:29 -0800173 struct xfrm_algo_aead *aead;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700174
175 /* Data for encapsulator */
176 struct xfrm_encap_tmpl *encap;
177
Noriaki TAKAMIYA060f02a2006-08-23 18:18:55 -0700178 /* Data for care-of address */
179 xfrm_address_t *coaddr;
180
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181 /* IPComp needs an IPIP tunnel for handling uncompressed packets */
182 struct xfrm_state *tunnel;
183
184 /* If a tunnel, number of users + 1 */
185 atomic_t tunnel_users;
186
187 /* State for replay detection */
188 struct xfrm_replay_state replay;
Steffen Klassert9736acf2011-03-08 00:05:43 +0000189 struct xfrm_replay_state_esn *replay_esn;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190
Jamal Hadi Salimf8cd5482006-03-20 19:15:11 -0800191 /* Replay detection state at the time we sent the last notification */
192 struct xfrm_replay_state preplay;
Steffen Klassert9736acf2011-03-08 00:05:43 +0000193 struct xfrm_replay_state_esn *preplay_esn;
Jamal Hadi Salimf8cd5482006-03-20 19:15:11 -0800194
Steffen Klassert9fdc4882011-03-08 00:08:32 +0000195 /* The functions for replay detection. */
196 struct xfrm_replay *repl;
197
Jamal Hadi Salim27170962006-04-14 15:03:05 -0700198 /* internal flag that only holds state for delayed aevent at the
199 * moment
200 */
201 u32 xflags;
202
Jamal Hadi Salimf8cd5482006-03-20 19:15:11 -0800203 /* Replay detection notification settings */
204 u32 replay_maxage;
205 u32 replay_maxdiff;
206
207 /* Replay detection notification timer */
208 struct timer_list rtimer;
209
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210 /* Statistics */
211 struct xfrm_stats stats;
212
213 struct xfrm_lifetime_cur curlft;
Yury Polyanskiy9e0d57f2009-11-08 20:58:41 -0800214 struct tasklet_hrtimer mtimer;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700215
Masahide NAKAMURA9afaca02006-08-23 18:20:16 -0700216 /* Last used time */
Herbert Xud26f3982007-11-13 21:47:08 -0800217 unsigned long lastused;
Masahide NAKAMURA9afaca02006-08-23 18:20:16 -0700218
Linus Torvalds1da177e2005-04-16 15:20:36 -0700219 /* Reference to data common to all the instances of this
220 * transformer. */
Eric Dumazet533cb5b2008-01-30 19:11:50 -0800221 const struct xfrm_type *type;
Herbert Xu13996372007-10-17 21:35:51 -0700222 struct xfrm_mode *inner_mode;
Kazunori MIYAZAWAdf9dcb42008-03-24 14:51:51 -0700223 struct xfrm_mode *inner_mode_iaf;
Herbert Xu13996372007-10-17 21:35:51 -0700224 struct xfrm_mode *outer_mode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700225
Trent Jaegerdf718372005-12-13 23:12:27 -0800226 /* Security context */
227 struct xfrm_sec_ctx *security;
228
Linus Torvalds1da177e2005-04-16 15:20:36 -0700229 /* Private data of this transformer, format is opaque,
230 * interpreted by xfrm_type methods. */
231 void *data;
232};
233
Alexey Dobriyan673c09b2008-11-25 17:15:16 -0800234static inline struct net *xs_net(struct xfrm_state *x)
235{
236 return read_pnet(&x->xs_net);
237}
238
Jamal Hadi Salim27170962006-04-14 15:03:05 -0700239/* xflags - make enum if more show up */
240#define XFRM_TIME_DEFER 1
241
Linus Torvalds1da177e2005-04-16 15:20:36 -0700242enum {
243 XFRM_STATE_VOID,
244 XFRM_STATE_ACQ,
245 XFRM_STATE_VALID,
246 XFRM_STATE_ERROR,
247 XFRM_STATE_EXPIRED,
248 XFRM_STATE_DEAD
249};
250
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -0700251/* callback structure passed from either netlink or pfkey */
Eric Dumazetfd2c3ef2009-11-03 03:26:03 +0000252struct km_event {
Herbert Xubf088672005-06-18 22:44:00 -0700253 union {
254 u32 hard;
255 u32 proto;
256 u32 byid;
Jamal Hadi Salimf8cd5482006-03-20 19:15:11 -0800257 u32 aevent;
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -0700258 u32 type;
Herbert Xubf088672005-06-18 22:44:00 -0700259 } data;
260
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -0700261 u32 seq;
262 u32 pid;
263 u32 event;
Alexey Dobriyan70678022008-11-25 17:50:36 -0800264 struct net *net;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -0700265};
266
Steffen Klassert9fdc4882011-03-08 00:08:32 +0000267struct xfrm_replay {
268 void (*advance)(struct xfrm_state *x, __be32 net_seq);
269 int (*check)(struct xfrm_state *x,
270 struct sk_buff *skb,
271 __be32 net_seq);
272 void (*notify)(struct xfrm_state *x, int event);
273 int (*overflow)(struct xfrm_state *x, struct sk_buff *skb);
274};
275
Herbert Xu25ee3282007-12-11 09:32:34 -0800276struct net_device;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700277struct xfrm_type;
278struct xfrm_dst;
279struct xfrm_policy_afinfo {
280 unsigned short family;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700281 struct dst_ops *dst_ops;
Alexey Dobriyanddcfd792008-11-25 17:37:23 -0800282 void (*garbage_collect)(struct net *net);
Alexey Dobriyanc5b3cf42008-11-25 17:51:25 -0800283 struct dst_entry *(*dst_lookup)(struct net *net, int tos,
David S. Miller5e6b9302011-02-24 00:14:45 -0500284 const xfrm_address_t *saddr,
285 const xfrm_address_t *daddr);
Alexey Dobriyanfbda33b2008-11-25 17:56:49 -0800286 int (*get_saddr)(struct net *net, xfrm_address_t *saddr, xfrm_address_t *daddr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700287 void (*decode_session)(struct sk_buff *skb,
Herbert Xud5422ef2007-12-12 10:44:16 -0800288 struct flowi *fl,
289 int reverse);
David S. Miller05d84022011-02-22 17:47:10 -0800290 int (*get_tos)(const struct flowi *fl);
Masahide NAKAMURAa1b05142007-12-20 20:41:12 -0800291 int (*init_path)(struct xfrm_dst *path,
292 struct dst_entry *dst,
293 int nfheader_len);
Herbert Xu25ee3282007-12-11 09:32:34 -0800294 int (*fill_dst)(struct xfrm_dst *xdst,
Herbert Xu87c1e122010-03-02 02:51:56 +0000295 struct net_device *dev,
David S. Miller0c7b3ee2011-02-22 17:48:57 -0800296 const struct flowi *fl);
David S. Miller2774c132011-03-01 14:59:04 -0800297 struct dst_entry *(*blackhole_route)(struct net *net, struct dst_entry *orig);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700298};
299
300extern int xfrm_policy_register_afinfo(struct xfrm_policy_afinfo *afinfo);
301extern int xfrm_policy_unregister_afinfo(struct xfrm_policy_afinfo *afinfo);
David S. Miller214e0052011-02-24 00:02:38 -0500302extern void km_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c);
303extern void km_state_notify(struct xfrm_state *x, const struct km_event *c);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700304
305struct xfrm_tmpl;
Jamal Hadi Salim980ebd22006-03-20 19:16:40 -0800306extern int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol);
Jamal Hadi Salim53bc6b42006-03-20 19:17:03 -0800307extern void km_state_expired(struct xfrm_state *x, int hard, u32 pid);
308extern int __xfrm_state_delete(struct xfrm_state *x);
309
Linus Torvalds1da177e2005-04-16 15:20:36 -0700310struct xfrm_state_afinfo {
Herbert Xu17c2a422007-10-17 21:33:12 -0700311 unsigned int family;
Herbert Xu36cf9ac2007-11-13 21:40:52 -0800312 unsigned int proto;
Al Viro8e3d7162008-03-17 22:49:16 -0700313 __be16 eth_proto;
Herbert Xu17c2a422007-10-17 21:33:12 -0700314 struct module *owner;
Eric Dumazet533cb5b2008-01-30 19:11:50 -0800315 const struct xfrm_type *type_map[IPPROTO_MAX];
Herbert Xuaa5d62c2007-10-17 21:31:12 -0700316 struct xfrm_mode *mode_map[XFRM_MODE_MAX];
Herbert Xud094cd82005-06-20 13:19:41 -0700317 int (*init_flags)(struct xfrm_state *x);
David S. Miller73e5ebb2011-02-22 17:51:44 -0800318 void (*init_tempsel)(struct xfrm_selector *sel,
319 const struct flowi *fl);
David S. Miller19bd6242011-02-24 00:07:20 -0500320 void (*init_temprop)(struct xfrm_state *x,
321 const struct xfrm_tmpl *tmpl,
322 const xfrm_address_t *daddr,
323 const xfrm_address_t *saddr);
Masahide NAKAMURA41a49cc2006-08-23 22:48:31 -0700324 int (*tmpl_sort)(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n);
325 int (*state_sort)(struct xfrm_state **dst, struct xfrm_state **src, int n);
Miika Komucdca7262007-02-06 14:24:56 -0800326 int (*output)(struct sk_buff *skb);
Steffen Klassert43a4dea2011-05-09 19:36:38 +0000327 int (*output_finish)(struct sk_buff *skb);
Herbert Xu227620e2007-11-13 21:41:28 -0800328 int (*extract_input)(struct xfrm_state *x,
329 struct sk_buff *skb);
Herbert Xu36cf9ac2007-11-13 21:40:52 -0800330 int (*extract_output)(struct xfrm_state *x,
331 struct sk_buff *skb);
Herbert Xu716062f2007-11-13 21:44:23 -0800332 int (*transport_finish)(struct sk_buff *skb,
333 int async);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700334};
335
336extern int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo);
337extern int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo);
338
339extern void xfrm_state_delete_tunnel(struct xfrm_state *x);
340
Eric Dumazetfd2c3ef2009-11-03 03:26:03 +0000341struct xfrm_type {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700342 char *description;
343 struct module *owner;
jamala6337462010-02-09 13:21:17 +0000344 u8 proto;
345 u8 flags;
Masahide NAKAMURA1b5c2292006-08-23 18:11:50 -0700346#define XFRM_TYPE_NON_FRAGMENT 1
Herbert Xu436a0a42007-10-08 17:25:53 -0700347#define XFRM_TYPE_REPLAY_PROT 2
Herbert Xuf04e7e82007-11-13 21:36:51 -0800348#define XFRM_TYPE_LOCAL_COADDR 4
349#define XFRM_TYPE_REMOTE_COADDR 8
Linus Torvalds1da177e2005-04-16 15:20:36 -0700350
Herbert Xu72cb6962005-06-20 13:18:08 -0700351 int (*init_state)(struct xfrm_state *x);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700352 void (*destructor)(struct xfrm_state *);
Herbert Xue6956332006-04-01 00:52:46 -0800353 int (*input)(struct xfrm_state *, struct sk_buff *skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700354 int (*output)(struct xfrm_state *, struct sk_buff *pskb);
David S. Miller8f029de2011-02-22 17:59:59 -0800355 int (*reject)(struct xfrm_state *, struct sk_buff *,
356 const struct flowi *);
Masahide NAKAMURAaee5adb2006-08-23 17:57:28 -0700357 int (*hdr_offset)(struct xfrm_state *, struct sk_buff *, u8 **);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700358 /* Estimate maximal size of result of transformation of a dgram */
Patrick McHardyc5c25232007-04-09 11:47:18 -0700359 u32 (*get_mtu)(struct xfrm_state *, int size);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700360};
361
Eric Dumazet533cb5b2008-01-30 19:11:50 -0800362extern int xfrm_register_type(const struct xfrm_type *type, unsigned short family);
363extern int xfrm_unregister_type(const struct xfrm_type *type, unsigned short family);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700364
Herbert Xub59f45d2006-05-27 23:05:54 -0700365struct xfrm_mode {
Herbert Xu227620e2007-11-13 21:41:28 -0800366 /*
367 * Remove encapsulation header.
368 *
369 * The IP header will be moved over the top of the encapsulation
370 * header.
371 *
372 * On entry, the transport header shall point to where the IP header
373 * should be and the network header shall be set to where the IP
374 * header currently is. skb->data shall point to the start of the
375 * payload.
376 */
377 int (*input2)(struct xfrm_state *x, struct sk_buff *skb);
378
379 /*
380 * This is the actual input entry point.
381 *
382 * For transport mode and equivalent this would be identical to
383 * input2 (which does not need to be set). While tunnel mode
384 * and equivalent would set this to the tunnel encapsulation function
385 * xfrm4_prepare_input that would in turn call input2.
386 */
Herbert Xub59f45d2006-05-27 23:05:54 -0700387 int (*input)(struct xfrm_state *x, struct sk_buff *skb);
Herbert Xu37fedd32007-10-10 15:44:44 -0700388
389 /*
390 * Add encapsulation header.
391 *
392 * On exit, the transport header will be set to the start of the
393 * encapsulation header to be filled in by x->type->output and
394 * the mac header will be set to the nextheader (protocol for
395 * IPv4) field of the extension header directly preceding the
396 * encapsulation header, or in its absence, that of the top IP
397 * header. The value of the network header will always point
398 * to the top IP header while skb->data will point to the payload.
399 */
Herbert Xu36cf9ac2007-11-13 21:40:52 -0800400 int (*output2)(struct xfrm_state *x,struct sk_buff *skb);
401
402 /*
403 * This is the actual output entry point.
404 *
405 * For transport mode and equivalent this would be identical to
406 * output2 (which does not need to be set). While tunnel mode
407 * and equivalent would set this to a tunnel encapsulation function
408 * (xfrm4_prepare_output or xfrm6_prepare_output) that would in turn
409 * call output2.
410 */
411 int (*output)(struct xfrm_state *x, struct sk_buff *skb);
Herbert Xub59f45d2006-05-27 23:05:54 -0700412
Herbert Xu17c2a422007-10-17 21:33:12 -0700413 struct xfrm_state_afinfo *afinfo;
Herbert Xub59f45d2006-05-27 23:05:54 -0700414 struct module *owner;
415 unsigned int encap;
Herbert Xu1bfcb102007-10-17 21:31:50 -0700416 int flags;
417};
418
419/* Flags for xfrm_mode. */
420enum {
421 XFRM_MODE_FLAG_TUNNEL = 1,
Herbert Xub59f45d2006-05-27 23:05:54 -0700422};
423
424extern int xfrm_register_mode(struct xfrm_mode *mode, int family);
425extern int xfrm_unregister_mode(struct xfrm_mode *mode, int family);
Herbert Xub59f45d2006-05-27 23:05:54 -0700426
Kazunori MIYAZAWAdf9dcb42008-03-24 14:51:51 -0700427static inline int xfrm_af2proto(unsigned int family)
428{
429 switch(family) {
430 case AF_INET:
431 return IPPROTO_IPIP;
432 case AF_INET6:
433 return IPPROTO_IPV6;
434 default:
435 return 0;
436 }
437}
438
439static inline struct xfrm_mode *xfrm_ip2inner_mode(struct xfrm_state *x, int ipproto)
440{
441 if ((ipproto == IPPROTO_IPIP && x->props.family == AF_INET) ||
442 (ipproto == IPPROTO_IPV6 && x->props.family == AF_INET6))
443 return x->inner_mode;
444 else
445 return x->inner_mode_iaf;
446}
447
Eric Dumazetfd2c3ef2009-11-03 03:26:03 +0000448struct xfrm_tmpl {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700449/* id in template is interpreted as:
450 * daddr - destination of tunnel, may be zero for transport mode.
451 * spi - zero to acquire spi. Not zero if spi is static, then
452 * daddr must be fixed too.
453 * proto - AH/ESP/IPCOMP
454 */
455 struct xfrm_id id;
456
457/* Source address of tunnel. Ignored, if it is not a tunnel. */
458 xfrm_address_t saddr;
459
Miika Komu76b3f052006-11-30 16:40:43 -0800460 unsigned short encap_family;
461
jamala6337462010-02-09 13:21:17 +0000462 u32 reqid;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700463
Masahide NAKAMURA7e49e6d2006-09-22 15:05:15 -0700464/* Mode: transport, tunnel etc. */
jamala6337462010-02-09 13:21:17 +0000465 u8 mode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700466
467/* Sharing mode: unique, this session only, this user only etc. */
jamala6337462010-02-09 13:21:17 +0000468 u8 share;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700469
470/* May skip this transfomration if no SA is found */
jamala6337462010-02-09 13:21:17 +0000471 u8 optional;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700472
Herbert Xuc5d18e92008-04-22 00:46:42 -0700473/* Skip aalgos/ealgos/calgos checks. */
jamala6337462010-02-09 13:21:17 +0000474 u8 allalgs;
Herbert Xuc5d18e92008-04-22 00:46:42 -0700475
Linus Torvalds1da177e2005-04-16 15:20:36 -0700476/* Bit mask of algos allowed for acquisition */
jamala6337462010-02-09 13:21:17 +0000477 u32 aalgos;
478 u32 ealgos;
479 u32 calgos;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700480};
481
Masahide NAKAMURA622dc822006-08-23 17:52:01 -0700482#define XFRM_MAX_DEPTH 6
Linus Torvalds1da177e2005-04-16 15:20:36 -0700483
Herbert Xu12a169e2008-10-01 07:03:24 -0700484struct xfrm_policy_walk_entry {
485 struct list_head all;
486 u8 dead;
487};
488
489struct xfrm_policy_walk {
490 struct xfrm_policy_walk_entry walk;
491 u8 type;
492 u32 seq;
493};
494
Eric Dumazetfd2c3ef2009-11-03 03:26:03 +0000495struct xfrm_policy {
Alexey Dobriyan0331b1f2008-11-25 17:21:45 -0800496#ifdef CONFIG_NET_NS
497 struct net *xp_net;
498#endif
David S. Miller2518c7c2006-08-24 04:45:07 -0700499 struct hlist_node bydst;
500 struct hlist_node byidx;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700501
502 /* This lock only affects elements except for entry. */
503 rwlock_t lock;
504 atomic_t refcnt;
505 struct timer_list timer;
506
Timo Teräsfe1a5f02010-04-07 00:30:04 +0000507 struct flow_cache_object flo;
Timo Teräs80c802f2010-04-07 00:30:05 +0000508 atomic_t genid;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700509 u32 priority;
510 u32 index;
Jamal Hadi Salimbf825f82010-02-22 11:32:54 +0000511 struct xfrm_mark mark;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700512 struct xfrm_selector selector;
513 struct xfrm_lifetime_cfg lft;
514 struct xfrm_lifetime_cur curlft;
Herbert Xu12a169e2008-10-01 07:03:24 -0700515 struct xfrm_policy_walk_entry walk;
Arnaldo Carvalho de Melo46ca5f52006-11-27 17:58:59 -0200516 u8 type;
517 u8 action;
518 u8 flags;
Arnaldo Carvalho de Melo46ca5f52006-11-27 17:58:59 -0200519 u8 xfrm_nr;
Herbert Xu12a169e2008-10-01 07:03:24 -0700520 u16 family;
Trent Jaegerdf718372005-12-13 23:12:27 -0800521 struct xfrm_sec_ctx *security;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700522 struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH];
523};
524
David S. Miller63eb23f2011-02-24 01:25:19 -0500525static inline struct net *xp_net(const struct xfrm_policy *xp)
Alexey Dobriyan0331b1f2008-11-25 17:21:45 -0800526{
527 return read_pnet(&xp->xp_net);
528}
529
Arnaud Ebalard13c1d182008-10-05 13:33:42 -0700530struct xfrm_kmaddress {
531 xfrm_address_t local;
532 xfrm_address_t remote;
533 u32 reserved;
534 u16 family;
535};
536
Shinta Sugimoto80c9aba2007-02-08 13:11:42 -0800537struct xfrm_migrate {
538 xfrm_address_t old_daddr;
539 xfrm_address_t old_saddr;
540 xfrm_address_t new_daddr;
541 xfrm_address_t new_saddr;
542 u8 proto;
543 u8 mode;
544 u16 reserved;
545 u32 reqid;
546 u16 old_family;
547 u16 new_family;
548};
549
Jamal Hadi Salimf8cd5482006-03-20 19:15:11 -0800550#define XFRM_KM_TIMEOUT 30
551/* which seqno */
552#define XFRM_REPLAY_SEQ 1
553#define XFRM_REPLAY_OSEQ 2
554#define XFRM_REPLAY_SEQ_MASK 3
555/* what happened */
556#define XFRM_REPLAY_UPDATE XFRM_AE_CR
557#define XFRM_REPLAY_TIMEOUT XFRM_AE_CE
558
559/* default aevent timeout in units of 100ms */
560#define XFRM_AE_ETIME 10
561/* Async Event timer multiplier */
562#define XFRM_AE_ETH_M 10
563/* default seq threshold size */
564#define XFRM_AE_SEQT_SIZE 2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700565
Eric Dumazetfd2c3ef2009-11-03 03:26:03 +0000566struct xfrm_mgr {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700567 struct list_head list;
568 char *id;
David S. Miller214e0052011-02-24 00:02:38 -0500569 int (*notify)(struct xfrm_state *x, const struct km_event *c);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700570 int (*acquire)(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *xp, int dir);
Venkat Yekkiralacb969f02006-07-24 23:32:20 -0700571 struct xfrm_policy *(*compile_policy)(struct sock *sk, int opt, u8 *data, int len, int *dir);
Al Viro5d36b182006-11-08 00:24:06 -0800572 int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport);
David S. Miller214e0052011-02-24 00:02:38 -0500573 int (*notify_policy)(struct xfrm_policy *x, int dir, const struct km_event *c);
Alexey Dobriyandb983c12008-11-25 17:51:01 -0800574 int (*report)(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr);
David S. Miller183cad12011-02-24 00:28:01 -0500575 int (*migrate)(const struct xfrm_selector *sel,
576 u8 dir, u8 type,
577 const struct xfrm_migrate *m,
578 int num_bundles,
579 const struct xfrm_kmaddress *k);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700580};
581
582extern int xfrm_register_km(struct xfrm_mgr *km);
583extern int xfrm_unregister_km(struct xfrm_mgr *km);
584
Herbert Xu436a0a42007-10-08 17:25:53 -0700585/*
586 * This structure is used for the duration where packets are being
587 * transformed by IPsec. As soon as the packet leaves IPsec the
588 * area beyond the generic IP part may be overwritten.
589 */
590struct xfrm_skb_cb {
591 union {
592 struct inet_skb_parm h4;
593 struct inet6_skb_parm h6;
594 } header;
595
596 /* Sequence number for replay protection. */
Herbert Xub318e0e2008-02-12 22:50:35 -0800597 union {
Steffen Klassert1ce36442011-03-08 00:06:31 +0000598 struct {
599 __u32 low;
600 __u32 hi;
601 } output;
602 struct {
603 __be32 low;
604 __be32 hi;
605 } input;
Herbert Xub318e0e2008-02-12 22:50:35 -0800606 } seq;
Herbert Xu436a0a42007-10-08 17:25:53 -0700607};
608
609#define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0]))
610
Herbert Xu36cf9ac2007-11-13 21:40:52 -0800611/*
612 * This structure is used by the afinfo prepare_input/prepare_output functions
613 * to transmit header information to the mode input/output functions.
614 */
615struct xfrm_mode_skb_cb {
616 union {
617 struct inet_skb_parm h4;
618 struct inet6_skb_parm h6;
619 } header;
620
621 /* Copied from header for IPv4, always set to zero and DF for IPv6. */
622 __be16 id;
623 __be16 frag_off;
624
Herbert Xu732c8bd2008-03-26 16:51:09 -0700625 /* IP header length (excluding options or extension headers). */
626 u8 ihl;
627
Herbert Xu36cf9ac2007-11-13 21:40:52 -0800628 /* TOS for IPv4, class for IPv6. */
629 u8 tos;
630
631 /* TTL for IPv4, hop limitfor IPv6. */
632 u8 ttl;
633
634 /* Protocol for IPv4, NH for IPv6. */
635 u8 protocol;
636
Herbert Xu732c8bd2008-03-26 16:51:09 -0700637 /* Option length for IPv4, zero for IPv6. */
638 u8 optlen;
639
Herbert Xu36cf9ac2007-11-13 21:40:52 -0800640 /* Used by IPv6 only, zero for IPv4. */
641 u8 flow_lbl[3];
642};
643
644#define XFRM_MODE_SKB_CB(__skb) ((struct xfrm_mode_skb_cb *)&((__skb)->cb[0]))
645
Herbert Xu716062f2007-11-13 21:44:23 -0800646/*
647 * This structure is used by the input processing to locate the SPI and
648 * related information.
649 */
650struct xfrm_spi_skb_cb {
651 union {
652 struct inet_skb_parm h4;
653 struct inet6_skb_parm h6;
654 } header;
655
Herbert Xu716062f2007-11-13 21:44:23 -0800656 unsigned int daddroff;
Herbert Xu2fcb45b2007-12-03 22:54:12 -0800657 unsigned int family;
Herbert Xu716062f2007-11-13 21:44:23 -0800658};
659
660#define XFRM_SPI_SKB_CB(__skb) ((struct xfrm_spi_skb_cb *)&((__skb)->cb[0]))
661
Joy Latten161a09e2006-11-27 13:11:54 -0600662/* Audit Information */
Eric Dumazetfd2c3ef2009-11-03 03:26:03 +0000663struct xfrm_audit {
Joy Latten161a09e2006-11-27 13:11:54 -0600664 u32 secid;
Eric Paris25323862008-04-18 10:09:25 -0400665 uid_t loginuid;
666 u32 sessionid;
Joy Latten161a09e2006-11-27 13:11:54 -0600667};
Joy Lattenc9204d92006-11-30 15:50:43 -0600668
669#ifdef CONFIG_AUDITSYSCALL
Paul Mooreafeb14b2007-12-21 14:58:11 -0800670static inline struct audit_buffer *xfrm_audit_start(const char *op)
Joy Lattenab5f5e82007-09-17 11:51:22 -0700671{
672 struct audit_buffer *audit_buf = NULL;
Paul Mooreafeb14b2007-12-21 14:58:11 -0800673
674 if (audit_enabled == 0)
675 return NULL;
676 audit_buf = audit_log_start(current->audit_context, GFP_ATOMIC,
677 AUDIT_MAC_IPSEC_EVENT);
678 if (audit_buf == NULL)
679 return NULL;
680 audit_log_format(audit_buf, "op=%s", op);
681 return audit_buf;
682}
683
Eric Paris25323862008-04-18 10:09:25 -0400684static inline void xfrm_audit_helper_usrinfo(uid_t auid, u32 ses, u32 secid,
Paul Mooreafeb14b2007-12-21 14:58:11 -0800685 struct audit_buffer *audit_buf)
686{
Joy Lattenab5f5e82007-09-17 11:51:22 -0700687 char *secctx;
688 u32 secctx_len;
689
Eric Paris25323862008-04-18 10:09:25 -0400690 audit_log_format(audit_buf, " auid=%u ses=%u", auid, ses);
Paul Moore68277ac2007-12-20 20:49:33 -0800691 if (secid != 0 &&
692 security_secid_to_secctx(secid, &secctx, &secctx_len) == 0) {
Joy Lattenab5f5e82007-09-17 11:51:22 -0700693 audit_log_format(audit_buf, " subj=%s", secctx);
694 security_release_secctx(secctx, secctx_len);
695 } else
696 audit_log_task_context(audit_buf);
Joy Lattenab5f5e82007-09-17 11:51:22 -0700697}
698
699extern void xfrm_audit_policy_add(struct xfrm_policy *xp, int result,
Eric Paris25323862008-04-18 10:09:25 -0400700 u32 auid, u32 ses, u32 secid);
Joy Lattenab5f5e82007-09-17 11:51:22 -0700701extern void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result,
Eric Paris25323862008-04-18 10:09:25 -0400702 u32 auid, u32 ses, u32 secid);
Joy Lattenab5f5e82007-09-17 11:51:22 -0700703extern void xfrm_audit_state_add(struct xfrm_state *x, int result,
Eric Paris25323862008-04-18 10:09:25 -0400704 u32 auid, u32 ses, u32 secid);
Joy Lattenab5f5e82007-09-17 11:51:22 -0700705extern void xfrm_audit_state_delete(struct xfrm_state *x, int result,
Eric Paris25323862008-04-18 10:09:25 -0400706 u32 auid, u32 ses, u32 secid);
Paul Mooreafeb14b2007-12-21 14:58:11 -0800707extern void xfrm_audit_state_replay_overflow(struct xfrm_state *x,
708 struct sk_buff *skb);
Steffen Klassert9fdc4882011-03-08 00:08:32 +0000709extern void xfrm_audit_state_replay(struct xfrm_state *x,
710 struct sk_buff *skb, __be32 net_seq);
Paul Mooreafeb14b2007-12-21 14:58:11 -0800711extern void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family);
712extern void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family,
713 __be32 net_spi, __be32 net_seq);
714extern void xfrm_audit_state_icvfail(struct xfrm_state *x,
715 struct sk_buff *skb, u8 proto);
Joy Lattenc9204d92006-11-30 15:50:43 -0600716#else
Marcin Slusarz41fef0e2008-05-03 21:03:01 -0700717
718static inline void xfrm_audit_policy_add(struct xfrm_policy *xp, int result,
719 u32 auid, u32 ses, u32 secid)
720{
721}
722
723static inline void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result,
724 u32 auid, u32 ses, u32 secid)
725{
726}
727
728static inline void xfrm_audit_state_add(struct xfrm_state *x, int result,
729 u32 auid, u32 ses, u32 secid)
730{
731}
732
733static inline void xfrm_audit_state_delete(struct xfrm_state *x, int result,
734 u32 auid, u32 ses, u32 secid)
735{
736}
737
738static inline void xfrm_audit_state_replay_overflow(struct xfrm_state *x,
739 struct sk_buff *skb)
740{
741}
742
Steffen Klassert9fdc4882011-03-08 00:08:32 +0000743static inline void xfrm_audit_state_replay(struct xfrm_state *x,
744 struct sk_buff *skb, __be32 net_seq)
745{
746}
747
Marcin Slusarz41fef0e2008-05-03 21:03:01 -0700748static inline void xfrm_audit_state_notfound_simple(struct sk_buff *skb,
749 u16 family)
750{
751}
752
753static inline void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family,
754 __be32 net_spi, __be32 net_seq)
755{
756}
757
758static inline void xfrm_audit_state_icvfail(struct xfrm_state *x,
759 struct sk_buff *skb, u8 proto)
760{
761}
Joy Lattenc9204d92006-11-30 15:50:43 -0600762#endif /* CONFIG_AUDITSYSCALL */
Joy Latten161a09e2006-11-27 13:11:54 -0600763
Linus Torvalds1da177e2005-04-16 15:20:36 -0700764static inline void xfrm_pol_hold(struct xfrm_policy *policy)
765{
766 if (likely(policy != NULL))
767 atomic_inc(&policy->refcnt);
768}
769
WANG Cong64c31b32008-01-07 22:34:29 -0800770extern void xfrm_policy_destroy(struct xfrm_policy *policy);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700771
772static inline void xfrm_pol_put(struct xfrm_policy *policy)
773{
774 if (atomic_dec_and_test(&policy->refcnt))
WANG Cong64c31b32008-01-07 22:34:29 -0800775 xfrm_policy_destroy(policy);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700776}
777
Masahide NAKAMURA4e81bb82006-08-23 22:43:30 -0700778static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols)
779{
780 int i;
781 for (i = npols - 1; i >= 0; --i)
782 xfrm_pol_put(pols[i]);
783}
Masahide NAKAMURA4e81bb82006-08-23 22:43:30 -0700784
Linus Torvalds1da177e2005-04-16 15:20:36 -0700785extern void __xfrm_state_destroy(struct xfrm_state *);
786
Herbert Xu21380b82006-02-22 14:47:13 -0800787static inline void __xfrm_state_put(struct xfrm_state *x)
788{
789 atomic_dec(&x->refcnt);
790}
791
Linus Torvalds1da177e2005-04-16 15:20:36 -0700792static inline void xfrm_state_put(struct xfrm_state *x)
793{
794 if (atomic_dec_and_test(&x->refcnt))
795 __xfrm_state_destroy(x);
796}
797
798static inline void xfrm_state_hold(struct xfrm_state *x)
799{
800 atomic_inc(&x->refcnt);
801}
802
David S. Miller1744a8f2011-02-22 18:02:12 -0800803static inline bool addr_match(const void *token1, const void *token2,
804 int prefixlen)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700805{
David S. Miller1744a8f2011-02-22 18:02:12 -0800806 const __be32 *a1 = token1;
807 const __be32 *a2 = token2;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700808 int pdw;
809 int pbi;
810
jamala6337462010-02-09 13:21:17 +0000811 pdw = prefixlen >> 5; /* num of whole u32 in prefix */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700812 pbi = prefixlen & 0x1f; /* num of bits in incomplete u32 in prefix */
813
814 if (pdw)
815 if (memcmp(a1, a2, pdw << 2))
David S. Miller1744a8f2011-02-22 18:02:12 -0800816 return false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700817
818 if (pbi) {
Al Viro5f193432006-09-27 18:46:32 -0700819 __be32 mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700820
821 mask = htonl((0xffffffff) << (32 - pbi));
822
823 if ((a1[pdw] ^ a2[pdw]) & mask)
David S. Miller1744a8f2011-02-22 18:02:12 -0800824 return false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700825 }
826
David S. Miller1744a8f2011-02-22 18:02:12 -0800827 return true;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700828}
829
830static __inline__
David S. Miller6281dcc2011-03-12 00:43:55 -0500831__be16 xfrm_flowi_sport(const struct flowi *fl, const union flowi_uli *uli)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700832{
Al Virof9d07e41f82006-09-27 18:45:50 -0700833 __be16 port;
David S. Miller1d28f422011-03-12 00:29:39 -0500834 switch(fl->flowi_proto) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700835 case IPPROTO_TCP:
836 case IPPROTO_UDP:
Gerrit Renkerba4e58e2006-11-27 11:10:57 -0800837 case IPPROTO_UDPLITE:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700838 case IPPROTO_SCTP:
David S. Miller6281dcc2011-03-12 00:43:55 -0500839 port = uli->ports.sport;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700840 break;
841 case IPPROTO_ICMP:
842 case IPPROTO_ICMPV6:
David S. Miller6281dcc2011-03-12 00:43:55 -0500843 port = htons(uli->icmpt.type);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700844 break;
Masahide NAKAMURA2ce42722006-08-23 20:39:03 -0700845 case IPPROTO_MH:
David S. Miller6281dcc2011-03-12 00:43:55 -0500846 port = htons(uli->mht.type);
Masahide NAKAMURA2ce42722006-08-23 20:39:03 -0700847 break;
Timo Teräscc9ff192010-11-03 04:41:38 +0000848 case IPPROTO_GRE:
David S. Miller6281dcc2011-03-12 00:43:55 -0500849 port = htons(ntohl(uli->gre_key) >> 16);
Timo Teräscc9ff192010-11-03 04:41:38 +0000850 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700851 default:
852 port = 0; /*XXX*/
853 }
854 return port;
855}
856
857static __inline__
David S. Miller6281dcc2011-03-12 00:43:55 -0500858__be16 xfrm_flowi_dport(const struct flowi *fl, const union flowi_uli *uli)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700859{
Al Virof9d07e41f82006-09-27 18:45:50 -0700860 __be16 port;
David S. Miller1d28f422011-03-12 00:29:39 -0500861 switch(fl->flowi_proto) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700862 case IPPROTO_TCP:
863 case IPPROTO_UDP:
Gerrit Renkerba4e58e2006-11-27 11:10:57 -0800864 case IPPROTO_UDPLITE:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700865 case IPPROTO_SCTP:
David S. Miller6281dcc2011-03-12 00:43:55 -0500866 port = uli->ports.dport;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700867 break;
868 case IPPROTO_ICMP:
869 case IPPROTO_ICMPV6:
David S. Miller6281dcc2011-03-12 00:43:55 -0500870 port = htons(uli->icmpt.code);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700871 break;
Timo Teräscc9ff192010-11-03 04:41:38 +0000872 case IPPROTO_GRE:
David S. Miller6281dcc2011-03-12 00:43:55 -0500873 port = htons(ntohl(uli->gre_key) & 0xffff);
Timo Teräscc9ff192010-11-03 04:41:38 +0000874 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700875 default:
876 port = 0; /*XXX*/
877 }
878 return port;
879}
880
David S. Miller200ce962011-02-24 00:12:25 -0500881extern int xfrm_selector_match(const struct xfrm_selector *sel,
David S. Millere1ad2ab2011-02-22 18:07:39 -0800882 const struct flowi *fl,
Andrew Morton77681022006-11-08 22:46:26 -0800883 unsigned short family);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700884
Trent Jaegerdf718372005-12-13 23:12:27 -0800885#ifdef CONFIG_SECURITY_NETWORK_XFRM
886/* If neither has a context --> match
887 * Otherwise, both must have a context and the sids, doi, alg must match
888 */
889static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2)
890{
891 return ((!s1 && !s2) ||
892 (s1 && s2 &&
893 (s1->ctx_sid == s2->ctx_sid) &&
894 (s1->ctx_doi == s2->ctx_doi) &&
895 (s1->ctx_alg == s2->ctx_alg)));
896}
897#else
898static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2)
899{
900 return 1;
901}
902#endif
903
Linus Torvalds1da177e2005-04-16 15:20:36 -0700904/* A struct encoding bundle of transformations to apply to some set of flow.
905 *
906 * dst->child points to the next element of bundle.
907 * dst->xfrm points to an instanse of transformer.
908 *
909 * Due to unfortunate limitations of current routing cache, which we
910 * have no time to fix, it mirrors struct rtable and bound to the same
911 * routing key, including saddr,daddr. However, we can have many of
912 * bundles differing by session id. All the bundles grow from a parent
913 * policy rule.
914 */
Eric Dumazetfd2c3ef2009-11-03 03:26:03 +0000915struct xfrm_dst {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700916 union {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700917 struct dst_entry dst;
918 struct rtable rt;
919 struct rt6_info rt6;
920 } u;
921 struct dst_entry *route;
Timo Teräs80c802f2010-04-07 00:30:05 +0000922 struct flow_cache_object flo;
923 struct xfrm_policy *pols[XFRM_POLICY_TYPE_MAX];
924 int num_pols, num_xfrms;
Masahide NAKAMURA157bfc22007-04-30 00:33:35 -0700925#ifdef CONFIG_XFRM_SUB_POLICY
926 struct flowi *origin;
927 struct xfrm_selector *partner;
928#endif
Timo Teräs80c802f2010-04-07 00:30:05 +0000929 u32 xfrm_genid;
930 u32 policy_genid;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700931 u32 route_mtu_cached;
932 u32 child_mtu_cached;
Hideaki YOSHIFUJI92d63de2005-05-26 12:58:04 -0700933 u32 route_cookie;
934 u32 path_cookie;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700935};
936
Alexey Dobriyandef8b4f2008-10-28 13:24:06 -0700937#ifdef CONFIG_XFRM
Herbert Xuaabc9762005-05-03 16:27:10 -0700938static inline void xfrm_dst_destroy(struct xfrm_dst *xdst)
939{
Timo Teräs80c802f2010-04-07 00:30:05 +0000940 xfrm_pols_put(xdst->pols, xdst->num_pols);
Herbert Xuaabc9762005-05-03 16:27:10 -0700941 dst_release(xdst->route);
942 if (likely(xdst->u.dst.xfrm))
943 xfrm_state_put(xdst->u.dst.xfrm);
Masahide NAKAMURA157bfc22007-04-30 00:33:35 -0700944#ifdef CONFIG_XFRM_SUB_POLICY
945 kfree(xdst->origin);
946 xdst->origin = NULL;
947 kfree(xdst->partner);
948 xdst->partner = NULL;
949#endif
Herbert Xuaabc9762005-05-03 16:27:10 -0700950}
Alexey Dobriyandef8b4f2008-10-28 13:24:06 -0700951#endif
Herbert Xuaabc9762005-05-03 16:27:10 -0700952
953extern void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev);
954
Eric Dumazetfd2c3ef2009-11-03 03:26:03 +0000955struct sec_path {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700956 atomic_t refcnt;
957 int len;
Herbert Xudbe5b4a2006-04-01 00:54:16 -0800958 struct xfrm_state *xvec[XFRM_MAX_DEPTH];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700959};
960
Michael Smith990078a2011-04-07 04:51:51 +0000961static inline int secpath_exists(struct sk_buff *skb)
962{
963#ifdef CONFIG_XFRM
964 return skb->sp != NULL;
965#else
966 return 0;
967#endif
968}
969
Linus Torvalds1da177e2005-04-16 15:20:36 -0700970static inline struct sec_path *
971secpath_get(struct sec_path *sp)
972{
973 if (sp)
974 atomic_inc(&sp->refcnt);
975 return sp;
976}
977
978extern void __secpath_destroy(struct sec_path *sp);
979
980static inline void
981secpath_put(struct sec_path *sp)
982{
983 if (sp && atomic_dec_and_test(&sp->refcnt))
984 __secpath_destroy(sp);
985}
986
987extern struct sec_path *secpath_dup(struct sec_path *src);
988
989static inline void
990secpath_reset(struct sk_buff *skb)
991{
992#ifdef CONFIG_XFRM
993 secpath_put(skb->sp);
994 skb->sp = NULL;
995#endif
996}
997
998static inline int
David S. Miller6cc32962011-02-24 00:19:59 -0500999xfrm_addr_any(const xfrm_address_t *addr, unsigned short family)
Patrick McHardya1e59ab2006-09-19 12:57:34 -07001000{
1001 switch (family) {
1002 case AF_INET:
1003 return addr->a4 == 0;
1004 case AF_INET6:
1005 return ipv6_addr_any((struct in6_addr *)&addr->a6);
1006 }
1007 return 0;
1008}
1009
1010static inline int
David S. Miller21eddb52011-02-24 01:35:16 -05001011__xfrm4_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001012{
1013 return (tmpl->saddr.a4 &&
1014 tmpl->saddr.a4 != x->props.saddr.a4);
1015}
1016
1017static inline int
David S. Miller21eddb52011-02-24 01:35:16 -05001018__xfrm6_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001019{
1020 return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) &&
1021 ipv6_addr_cmp((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr));
1022}
1023
1024static inline int
David S. Miller21eddb52011-02-24 01:35:16 -05001025xfrm_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x, unsigned short family)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001026{
1027 switch (family) {
1028 case AF_INET:
1029 return __xfrm4_state_addr_cmp(tmpl, x);
1030 case AF_INET6:
1031 return __xfrm6_state_addr_cmp(tmpl, x);
1032 }
1033 return !0;
1034}
1035
1036#ifdef CONFIG_XFRM
Linus Torvalds1da177e2005-04-16 15:20:36 -07001037extern int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb, unsigned short family);
1038
Herbert Xud5422ef2007-12-12 10:44:16 -08001039static inline int __xfrm_policy_check2(struct sock *sk, int dir,
1040 struct sk_buff *skb,
1041 unsigned int family, int reverse)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001042{
Alexey Dobriyanf6e1e252008-11-25 17:35:44 -08001043 struct net *net = dev_net(skb->dev);
Herbert Xud5422ef2007-12-12 10:44:16 -08001044 int ndir = dir | (reverse ? XFRM_POLICY_MASK + 1 : 0);
1045
Linus Torvalds1da177e2005-04-16 15:20:36 -07001046 if (sk && sk->sk_policy[XFRM_POLICY_IN])
Herbert Xud5422ef2007-12-12 10:44:16 -08001047 return __xfrm_policy_check(sk, ndir, skb, family);
Masahide NAKAMURA4e81bb82006-08-23 22:43:30 -07001048
Alexey Dobriyanf6e1e252008-11-25 17:35:44 -08001049 return (!net->xfrm.policy_count[dir] && !skb->sp) ||
Eric Dumazetadf30902009-06-02 05:19:30 +00001050 (skb_dst(skb)->flags & DST_NOPOLICY) ||
Herbert Xud5422ef2007-12-12 10:44:16 -08001051 __xfrm_policy_check(sk, ndir, skb, family);
1052}
1053
1054static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family)
1055{
1056 return __xfrm_policy_check2(sk, dir, skb, family, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001057}
1058
1059static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1060{
1061 return xfrm_policy_check(sk, dir, skb, AF_INET);
1062}
1063
1064static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1065{
1066 return xfrm_policy_check(sk, dir, skb, AF_INET6);
1067}
1068
Herbert Xud5422ef2007-12-12 10:44:16 -08001069static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir,
1070 struct sk_buff *skb)
1071{
1072 return __xfrm_policy_check2(sk, dir, skb, AF_INET, 1);
1073}
1074
1075static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir,
1076 struct sk_buff *skb)
1077{
1078 return __xfrm_policy_check2(sk, dir, skb, AF_INET6, 1);
1079}
1080
1081extern int __xfrm_decode_session(struct sk_buff *skb, struct flowi *fl,
1082 unsigned int family, int reverse);
1083
1084static inline int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl,
1085 unsigned int family)
1086{
1087 return __xfrm_decode_session(skb, fl, family, 0);
1088}
1089
1090static inline int xfrm_decode_session_reverse(struct sk_buff *skb,
1091 struct flowi *fl,
1092 unsigned int family)
1093{
1094 return __xfrm_decode_session(skb, fl, family, 1);
1095}
1096
Linus Torvalds1da177e2005-04-16 15:20:36 -07001097extern int __xfrm_route_forward(struct sk_buff *skb, unsigned short family);
1098
1099static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family)
1100{
Alexey Dobriyan99a66652008-11-25 17:36:13 -08001101 struct net *net = dev_net(skb->dev);
1102
1103 return !net->xfrm.policy_count[XFRM_POLICY_OUT] ||
Eric Dumazetadf30902009-06-02 05:19:30 +00001104 (skb_dst(skb)->flags & DST_NOXFRM) ||
Linus Torvalds1da177e2005-04-16 15:20:36 -07001105 __xfrm_route_forward(skb, family);
1106}
1107
1108static inline int xfrm4_route_forward(struct sk_buff *skb)
1109{
1110 return xfrm_route_forward(skb, AF_INET);
1111}
1112
1113static inline int xfrm6_route_forward(struct sk_buff *skb)
1114{
1115 return xfrm_route_forward(skb, AF_INET6);
1116}
1117
1118extern int __xfrm_sk_clone_policy(struct sock *sk);
1119
1120static inline int xfrm_sk_clone_policy(struct sock *sk)
1121{
1122 if (unlikely(sk->sk_policy[0] || sk->sk_policy[1]))
1123 return __xfrm_sk_clone_policy(sk);
1124 return 0;
1125}
1126
Herbert Xu4666faa2005-06-18 22:43:22 -07001127extern int xfrm_policy_delete(struct xfrm_policy *pol, int dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001128
1129static inline void xfrm_sk_free_policy(struct sock *sk)
1130{
1131 if (unlikely(sk->sk_policy[0] != NULL)) {
1132 xfrm_policy_delete(sk->sk_policy[0], XFRM_POLICY_MAX);
1133 sk->sk_policy[0] = NULL;
1134 }
1135 if (unlikely(sk->sk_policy[1] != NULL)) {
1136 xfrm_policy_delete(sk->sk_policy[1], XFRM_POLICY_MAX+1);
1137 sk->sk_policy[1] = NULL;
1138 }
1139}
1140
1141#else
1142
1143static inline void xfrm_sk_free_policy(struct sock *sk) {}
1144static inline int xfrm_sk_clone_policy(struct sock *sk) { return 0; }
1145static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; }
1146static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; }
1147static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1148{
1149 return 1;
1150}
1151static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1152{
1153 return 1;
1154}
1155static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family)
1156{
1157 return 1;
1158}
Herbert Xud5422ef2007-12-12 10:44:16 -08001159static inline int xfrm_decode_session_reverse(struct sk_buff *skb,
1160 struct flowi *fl,
1161 unsigned int family)
1162{
1163 return -ENOSYS;
1164}
1165static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir,
1166 struct sk_buff *skb)
1167{
1168 return 1;
1169}
1170static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir,
1171 struct sk_buff *skb)
1172{
1173 return 1;
1174}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001175#endif
1176
1177static __inline__
David S. Millere8a4e372011-02-22 17:42:56 -08001178xfrm_address_t *xfrm_flowi_daddr(const struct flowi *fl, unsigned short family)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001179{
1180 switch (family){
1181 case AF_INET:
David S. Miller7e1dc7b2011-03-12 02:42:11 -05001182 return (xfrm_address_t *)&fl->u.ip4.daddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001183 case AF_INET6:
David S. Miller7e1dc7b2011-03-12 02:42:11 -05001184 return (xfrm_address_t *)&fl->u.ip6.daddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001185 }
1186 return NULL;
1187}
1188
1189static __inline__
David S. Millere8a4e372011-02-22 17:42:56 -08001190xfrm_address_t *xfrm_flowi_saddr(const struct flowi *fl, unsigned short family)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001191{
1192 switch (family){
1193 case AF_INET:
David S. Miller7e1dc7b2011-03-12 02:42:11 -05001194 return (xfrm_address_t *)&fl->u.ip4.saddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001195 case AF_INET6:
David S. Miller7e1dc7b2011-03-12 02:42:11 -05001196 return (xfrm_address_t *)&fl->u.ip6.saddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001197 }
1198 return NULL;
1199}
1200
YOSHIFUJI Hideaki9bb182a2008-02-22 14:48:22 +09001201static __inline__
David S. Millere8a4e372011-02-22 17:42:56 -08001202void xfrm_flowi_addr_get(const struct flowi *fl,
YOSHIFUJI Hideaki9bb182a2008-02-22 14:48:22 +09001203 xfrm_address_t *saddr, xfrm_address_t *daddr,
1204 unsigned short family)
1205{
1206 switch(family) {
1207 case AF_INET:
David S. Miller7e1dc7b2011-03-12 02:42:11 -05001208 memcpy(&saddr->a4, &fl->u.ip4.saddr, sizeof(saddr->a4));
1209 memcpy(&daddr->a4, &fl->u.ip4.daddr, sizeof(daddr->a4));
YOSHIFUJI Hideaki9bb182a2008-02-22 14:48:22 +09001210 break;
1211 case AF_INET6:
David S. Miller7e1dc7b2011-03-12 02:42:11 -05001212 ipv6_addr_copy((struct in6_addr *)&saddr->a6, &fl->u.ip6.saddr);
1213 ipv6_addr_copy((struct in6_addr *)&daddr->a6, &fl->u.ip6.daddr);
YOSHIFUJI Hideaki9bb182a2008-02-22 14:48:22 +09001214 break;
1215 }
1216}
1217
Linus Torvalds1da177e2005-04-16 15:20:36 -07001218static __inline__ int
David S. Millerf8848062011-02-24 01:42:28 -05001219__xfrm4_state_addr_check(const struct xfrm_state *x,
1220 const xfrm_address_t *daddr, const xfrm_address_t *saddr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001221{
1222 if (daddr->a4 == x->id.daddr.a4 &&
1223 (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4))
1224 return 1;
1225 return 0;
1226}
1227
1228static __inline__ int
David S. Millerf8848062011-02-24 01:42:28 -05001229__xfrm6_state_addr_check(const struct xfrm_state *x,
1230 const xfrm_address_t *daddr, const xfrm_address_t *saddr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001231{
1232 if (!ipv6_addr_cmp((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) &&
1233 (!ipv6_addr_cmp((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr)||
1234 ipv6_addr_any((struct in6_addr *)saddr) ||
1235 ipv6_addr_any((struct in6_addr *)&x->props.saddr)))
1236 return 1;
1237 return 0;
1238}
1239
1240static __inline__ int
David S. Millerf8848062011-02-24 01:42:28 -05001241xfrm_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 unsigned short family)
1244{
1245 switch (family) {
1246 case AF_INET:
1247 return __xfrm4_state_addr_check(x, daddr, saddr);
1248 case AF_INET6:
1249 return __xfrm6_state_addr_check(x, daddr, saddr);
1250 }
1251 return 0;
1252}
1253
Masahide NAKAMURAe53820d2006-08-23 19:12:01 -07001254static __inline__ int
David S. Millerf8848062011-02-24 01:42:28 -05001255xfrm_state_addr_flow_check(const struct xfrm_state *x, const struct flowi *fl,
Masahide NAKAMURAe53820d2006-08-23 19:12:01 -07001256 unsigned short family)
1257{
1258 switch (family) {
1259 case AF_INET:
1260 return __xfrm4_state_addr_check(x,
David S. Miller7e1dc7b2011-03-12 02:42:11 -05001261 (const xfrm_address_t *)&fl->u.ip4.daddr,
1262 (const xfrm_address_t *)&fl->u.ip4.saddr);
Masahide NAKAMURAe53820d2006-08-23 19:12:01 -07001263 case AF_INET6:
1264 return __xfrm6_state_addr_check(x,
David S. Miller7e1dc7b2011-03-12 02:42:11 -05001265 (const xfrm_address_t *)&fl->u.ip6.daddr,
1266 (const xfrm_address_t *)&fl->u.ip6.saddr);
Masahide NAKAMURAe53820d2006-08-23 19:12:01 -07001267 }
1268 return 0;
1269}
1270
David S. Millerf8848062011-02-24 01:42:28 -05001271static inline int xfrm_state_kern(const struct xfrm_state *x)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001272{
1273 return atomic_read(&x->tunnel_users);
1274}
1275
Masahide NAKAMURA57947082006-09-22 15:06:24 -07001276static inline int xfrm_id_proto_match(u8 proto, u8 userproto)
1277{
Masahide NAKAMURAdc00a522006-08-23 17:49:52 -07001278 return (!userproto || proto == userproto ||
1279 (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH ||
1280 proto == IPPROTO_ESP ||
1281 proto == IPPROTO_COMP)));
Masahide NAKAMURA57947082006-09-22 15:06:24 -07001282}
1283
Linus Torvalds1da177e2005-04-16 15:20:36 -07001284/*
1285 * xfrm algorithm information
1286 */
Herbert Xu1a6509d2008-01-28 19:37:29 -08001287struct xfrm_algo_aead_info {
1288 u16 icv_truncbits;
1289};
1290
Linus Torvalds1da177e2005-04-16 15:20:36 -07001291struct xfrm_algo_auth_info {
1292 u16 icv_truncbits;
1293 u16 icv_fullbits;
1294};
1295
1296struct xfrm_algo_encr_info {
1297 u16 blockbits;
1298 u16 defkeybits;
1299};
1300
1301struct xfrm_algo_comp_info {
1302 u16 threshold;
1303};
1304
1305struct xfrm_algo_desc {
1306 char *name;
Herbert Xu04ff1262006-08-13 08:50:00 +10001307 char *compat;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001308 u8 available:1;
1309 union {
Herbert Xu1a6509d2008-01-28 19:37:29 -08001310 struct xfrm_algo_aead_info aead;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001311 struct xfrm_algo_auth_info auth;
1312 struct xfrm_algo_encr_info encr;
1313 struct xfrm_algo_comp_info comp;
1314 } uinfo;
1315 struct sadb_alg desc;
1316};
1317
1318/* XFRM tunnel handlers. */
1319struct xfrm_tunnel {
1320 int (*handler)(struct sk_buff *skb);
jamala6337462010-02-09 13:21:17 +00001321 int (*err_handler)(struct sk_buff *skb, u32 info);
Herbert Xud2acc342006-03-28 01:12:13 -08001322
Eric Dumazetb33eab02010-10-25 21:01:26 +00001323 struct xfrm_tunnel __rcu *next;
Herbert Xud2acc342006-03-28 01:12:13 -08001324 int priority;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001325};
1326
1327struct xfrm6_tunnel {
Herbert Xud2acc342006-03-28 01:12:13 -08001328 int (*handler)(struct sk_buff *skb);
1329 int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt,
Brian Haleyd5fdd6b2009-06-23 04:31:07 -07001330 u8 type, u8 code, int offset, __be32 info);
Eric Dumazet6f0bcf12010-10-24 21:33:16 +00001331 struct xfrm6_tunnel __rcu *next;
Herbert Xud2acc342006-03-28 01:12:13 -08001332 int priority;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001333};
1334
1335extern void xfrm_init(void);
Neil Hormana33bc5c2009-07-30 18:52:15 -07001336extern void xfrm4_init(int rt_hash_size);
Alexey Dobriyand62ddc22008-11-25 17:14:31 -08001337extern int xfrm_state_init(struct net *net);
1338extern void xfrm_state_fini(struct net *net);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001339extern void xfrm4_state_init(void);
Daniel Lezcanoc35b7e72007-12-08 00:14:11 -08001340#ifdef CONFIG_XFRM
1341extern int xfrm6_init(void);
1342extern void xfrm6_fini(void);
Daniel Lezcano0013cab2007-12-07 00:42:11 -08001343extern int xfrm6_state_init(void);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001344extern void xfrm6_state_fini(void);
Daniel Lezcanoc35b7e72007-12-08 00:14:11 -08001345#else
1346static inline int xfrm6_init(void)
1347{
1348 return 0;
1349}
1350static inline void xfrm6_fini(void)
1351{
1352 ;
1353}
1354#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001355
Masahide NAKAMURA558f82e2007-12-20 20:42:57 -08001356#ifdef CONFIG_XFRM_STATISTICS
Alexey Dobriyanc68cd1a2008-11-25 18:00:14 -08001357extern int xfrm_proc_init(struct net *net);
1358extern void xfrm_proc_fini(struct net *net);
Masahide NAKAMURA558f82e2007-12-20 20:42:57 -08001359#endif
1360
Alexey Dobriyanb27aead2008-11-25 18:00:48 -08001361extern int xfrm_sysctl_init(struct net *net);
1362#ifdef CONFIG_SYSCTL
1363extern void xfrm_sysctl_fini(struct net *net);
1364#else
1365static inline void xfrm_sysctl_fini(struct net *net)
1366{
1367}
1368#endif
1369
Herbert Xu5c182452008-09-22 19:48:19 -07001370extern void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto);
Alexey Dobriyan284fa7d2008-11-25 17:32:14 -08001371extern int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk,
Timo Teras4c563f72008-02-28 21:31:08 -08001372 int (*func)(struct xfrm_state *, int, void*), void *);
Herbert Xuabb81c42008-09-09 19:58:29 -07001373extern void xfrm_state_walk_done(struct xfrm_state_walk *walk);
Alexey Dobriyan673c09b2008-11-25 17:15:16 -08001374extern struct xfrm_state *xfrm_state_alloc(struct net *net);
David S. Miller33765d02011-02-24 01:55:45 -05001375extern struct xfrm_state *xfrm_state_find(const xfrm_address_t *daddr,
1376 const xfrm_address_t *saddr,
David S. Millerb520e9f2011-02-22 18:24:19 -08001377 const struct flowi *fl,
1378 struct xfrm_tmpl *tmpl,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001379 struct xfrm_policy *pol, int *err,
1380 unsigned short family);
Jamal Hadi Salimbd557752010-02-22 16:20:22 -08001381extern struct xfrm_state *xfrm_stateonly_find(struct net *net, u32 mark,
Alexey Dobriyan5447c5e2008-11-25 17:31:51 -08001382 xfrm_address_t *daddr,
Jamal Hadi Salim628529b2007-07-02 22:41:14 -07001383 xfrm_address_t *saddr,
1384 unsigned short family,
1385 u8 mode, u8 proto, u32 reqid);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001386extern int xfrm_state_check_expire(struct xfrm_state *x);
1387extern void xfrm_state_insert(struct xfrm_state *x);
1388extern int xfrm_state_add(struct xfrm_state *x);
1389extern int xfrm_state_update(struct xfrm_state *x);
Jamal Hadi Salimbd557752010-02-22 16:20:22 -08001390extern struct xfrm_state *xfrm_state_lookup(struct net *net, u32 mark,
David S. Millera70486f2011-02-27 23:17:24 -08001391 const xfrm_address_t *daddr, __be32 spi,
Jamal Hadi Salimbd557752010-02-22 16:20:22 -08001392 u8 proto, unsigned short family);
1393extern struct xfrm_state *xfrm_state_lookup_byaddr(struct net *net, u32 mark,
David S. Millera70486f2011-02-27 23:17:24 -08001394 const xfrm_address_t *daddr,
1395 const xfrm_address_t *saddr,
Jamal Hadi Salimbd557752010-02-22 16:20:22 -08001396 u8 proto,
1397 unsigned short family);
Masahide NAKAMURA41a49cc2006-08-23 22:48:31 -07001398#ifdef CONFIG_XFRM_SUB_POLICY
1399extern int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src,
1400 int n, unsigned short family);
1401extern int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src,
1402 int n, unsigned short family);
1403#else
1404static inline int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src,
1405 int n, unsigned short family)
1406{
1407 return -ENOSYS;
1408}
1409
1410static inline int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src,
1411 int n, unsigned short family)
1412{
1413 return -ENOSYS;
1414}
1415#endif
Jamal Hadi Salimaf11e312007-05-04 12:55:13 -07001416
1417struct xfrmk_sadinfo {
1418 u32 sadhcnt; /* current hash bkts */
1419 u32 sadhmcnt; /* max allowed hash bkts */
1420 u32 sadcnt; /* current running count */
1421};
1422
Jamal Hadi Salim5a6d3412007-05-04 12:55:39 -07001423struct xfrmk_spdinfo {
1424 u32 incnt;
1425 u32 outcnt;
1426 u32 fwdcnt;
1427 u32 inscnt;
1428 u32 outscnt;
1429 u32 fwdscnt;
1430 u32 spdhcnt;
1431 u32 spdhmcnt;
1432};
1433
Jamal Hadi Salimbd557752010-02-22 16:20:22 -08001434extern struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark,
1435 u32 seq);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001436extern int xfrm_state_delete(struct xfrm_state *x);
Alexey Dobriyan0e602452008-11-25 17:30:18 -08001437extern int xfrm_state_flush(struct net *net, u8 proto, struct xfrm_audit *audit_info);
Alexey Dobriyane0710412010-01-23 13:37:10 +00001438extern void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si);
1439extern void xfrm_spd_getinfo(struct net *net, struct xfrmk_spdinfo *si);
Steffen Klassert2cd08462011-03-08 00:09:51 +00001440extern u32 xfrm_replay_seqhi(struct xfrm_state *x, __be32 net_seq);
Steffen Klassert9fdc4882011-03-08 00:08:32 +00001441extern int xfrm_init_replay(struct xfrm_state *x);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001442extern int xfrm_state_mtu(struct xfrm_state *x, int mtu);
Wei Yongjuna454f0c2011-03-21 18:08:28 -07001443extern int __xfrm_init_state(struct xfrm_state *x, bool init_replay);
Herbert Xu72cb6962005-06-20 13:18:08 -07001444extern int xfrm_init_state(struct xfrm_state *x);
Herbert Xu227620e2007-11-13 21:41:28 -08001445extern int xfrm_prepare_input(struct xfrm_state *x, struct sk_buff *skb);
Herbert Xu716062f2007-11-13 21:44:23 -08001446extern int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi,
1447 int encap_type);
Herbert Xu1bf06cd2007-11-19 18:50:17 -08001448extern int xfrm_input_resume(struct sk_buff *skb, int nexthdr);
Herbert Xuc6581a42007-11-13 21:43:43 -08001449extern int xfrm_output_resume(struct sk_buff *skb, int err);
Herbert Xu406ef772007-10-08 17:16:30 -07001450extern int xfrm_output(struct sk_buff *skb);
Kazunori MIYAZAWAdf9dcb42008-03-24 14:51:51 -07001451extern int xfrm_inner_extract_output(struct xfrm_state *x, struct sk_buff *skb);
Herbert Xu36cf9ac2007-11-13 21:40:52 -08001452extern int xfrm4_extract_header(struct sk_buff *skb);
Herbert Xu227620e2007-11-13 21:41:28 -08001453extern int xfrm4_extract_input(struct xfrm_state *x, struct sk_buff *skb);
Herbert Xuc4541b42007-10-17 21:28:53 -07001454extern int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi,
1455 int encap_type);
Herbert Xu716062f2007-11-13 21:44:23 -08001456extern int xfrm4_transport_finish(struct sk_buff *skb, int async);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001457extern int xfrm4_rcv(struct sk_buff *skb);
Herbert Xuc4541b42007-10-17 21:28:53 -07001458
1459static inline int xfrm4_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi)
1460{
1461 return xfrm4_rcv_encap(skb, nexthdr, spi, 0);
1462}
1463
Herbert Xu36cf9ac2007-11-13 21:40:52 -08001464extern int xfrm4_extract_output(struct xfrm_state *x, struct sk_buff *skb);
1465extern int xfrm4_prepare_output(struct xfrm_state *x, struct sk_buff *skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001466extern int xfrm4_output(struct sk_buff *skb);
Steffen Klassert43a4dea2011-05-09 19:36:38 +00001467extern int xfrm4_output_finish(struct sk_buff *skb);
Kazunori MIYAZAWAc0d56402007-02-13 12:54:47 -08001468extern int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family);
1469extern int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family);
Herbert Xu36cf9ac2007-11-13 21:40:52 -08001470extern int xfrm6_extract_header(struct sk_buff *skb);
Herbert Xu227620e2007-11-13 21:41:28 -08001471extern int xfrm6_extract_input(struct xfrm_state *x, struct sk_buff *skb);
Herbert Xu33b5ecb2007-10-17 21:29:25 -07001472extern int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi);
Herbert Xu716062f2007-11-13 21:44:23 -08001473extern int xfrm6_transport_finish(struct sk_buff *skb, int async);
Herbert Xue5bbef22007-10-15 12:50:28 -07001474extern int xfrm6_rcv(struct sk_buff *skb);
Masahide NAKAMURAfbd9a5b2006-08-23 18:08:21 -07001475extern int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr,
1476 xfrm_address_t *saddr, u8 proto);
Kazunori MIYAZAWA73d605d2007-02-13 12:55:55 -08001477extern int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family);
1478extern int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family);
Alexey Dobriyana1664772010-01-25 10:37:54 +00001479extern __be32 xfrm6_tunnel_alloc_spi(struct net *net, xfrm_address_t *saddr);
Eric Dumazetb71d1d42011-04-22 04:53:02 +00001480extern __be32 xfrm6_tunnel_spi_lookup(struct net *net, const xfrm_address_t *saddr);
Herbert Xu36cf9ac2007-11-13 21:40:52 -08001481extern int xfrm6_extract_output(struct xfrm_state *x, struct sk_buff *skb);
1482extern int xfrm6_prepare_output(struct xfrm_state *x, struct sk_buff *skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001483extern int xfrm6_output(struct sk_buff *skb);
Steffen Klassert43a4dea2011-05-09 19:36:38 +00001484extern int xfrm6_output_finish(struct sk_buff *skb);
Masahide NAKAMURAaee5adb2006-08-23 17:57:28 -07001485extern int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb,
1486 u8 **prevhdr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001487
1488#ifdef CONFIG_XFRM
James Chapman067b2072007-07-05 17:08:05 -07001489extern int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001490extern int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001491#else
1492static inline int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen)
1493{
1494 return -ENOPROTOOPT;
1495}
1496
James Chapman067b2072007-07-05 17:08:05 -07001497static inline int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001498{
1499 /* should not happen */
1500 kfree_skb(skb);
1501 return 0;
1502}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001503#endif
1504
Alexey Dobriyan0331b1f2008-11-25 17:21:45 -08001505struct xfrm_policy *xfrm_policy_alloc(struct net *net, gfp_t gfp);
Timo Teras4c563f72008-02-28 21:31:08 -08001506
Herbert Xu12a169e2008-10-01 07:03:24 -07001507extern void xfrm_policy_walk_init(struct xfrm_policy_walk *walk, u8 type);
Alexey Dobriyancdcbca72008-11-25 17:34:49 -08001508extern int xfrm_policy_walk(struct net *net, struct xfrm_policy_walk *walk,
Timo Teras4c563f72008-02-28 21:31:08 -08001509 int (*func)(struct xfrm_policy *, int, int, void*), void *);
Herbert Xu12a169e2008-10-01 07:03:24 -07001510extern void xfrm_policy_walk_done(struct xfrm_policy_walk *walk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001511int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl);
Jamal Hadi Salim8ca2e932010-02-22 11:32:57 +00001512struct xfrm_policy *xfrm_policy_bysel_ctx(struct net *net, u32 mark,
1513 u8 type, int dir,
Masahide NAKAMURA4e81bb82006-08-23 22:43:30 -07001514 struct xfrm_selector *sel,
Eric Parisef41aaa2007-03-07 15:37:58 -08001515 struct xfrm_sec_ctx *ctx, int delete,
1516 int *err);
Jamal Hadi Salim8ca2e932010-02-22 11:32:57 +00001517struct 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 -08001518int xfrm_policy_flush(struct net *net, u8 type, struct xfrm_audit *audit_info);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001519u32 xfrm_get_acqseq(void);
Herbert Xu658b2192007-10-09 13:29:52 -07001520extern int xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi);
Jamal Hadi Salimbd557752010-02-22 16:20:22 -08001521struct xfrm_state *xfrm_find_acq(struct net *net, struct xfrm_mark *mark,
1522 u8 mode, u32 reqid, u8 proto,
David S. Millera70486f2011-02-27 23:17:24 -08001523 const xfrm_address_t *daddr,
1524 const xfrm_address_t *saddr, int create,
Jamal Hadi Salimbd557752010-02-22 16:20:22 -08001525 unsigned short family);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001526extern int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001527
Shinta Sugimoto80c9aba2007-02-08 13:11:42 -08001528#ifdef CONFIG_XFRM_MIGRATE
David S. Miller183cad12011-02-24 00:28:01 -05001529extern int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
1530 const struct xfrm_migrate *m, int num_bundles,
1531 const struct xfrm_kmaddress *k);
Shinta Sugimoto80c9aba2007-02-08 13:11:42 -08001532extern struct xfrm_state * xfrm_migrate_state_find(struct xfrm_migrate *m);
1533extern struct xfrm_state * xfrm_state_migrate(struct xfrm_state *x,
1534 struct xfrm_migrate *m);
David S. Millerb4b7c0b2011-02-24 00:35:06 -05001535extern int xfrm_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
Arnaud Ebalard13c1d182008-10-05 13:33:42 -07001536 struct xfrm_migrate *m, int num_bundles,
1537 struct xfrm_kmaddress *k);
Shinta Sugimoto80c9aba2007-02-08 13:11:42 -08001538#endif
1539
Al Viro5d36b182006-11-08 00:24:06 -08001540extern int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport);
Jamal Hadi Salim6c5c8ca2006-03-20 19:17:25 -08001541extern void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 pid);
Alexey Dobriyandb983c12008-11-25 17:51:01 -08001542extern int km_report(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001543
1544extern void xfrm_input_init(void);
Al Viro6067b2b2006-09-27 18:47:59 -07001545extern int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001546
1547extern void xfrm_probe_algs(void);
1548extern int xfrm_count_auth_supported(void);
1549extern int xfrm_count_enc_supported(void);
1550extern struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx);
1551extern struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx);
1552extern struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id);
1553extern struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id);
1554extern struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id);
David S. Miller6f2f19e2011-02-27 23:04:45 -08001555extern struct xfrm_algo_desc *xfrm_aalg_get_byname(const char *name, int probe);
1556extern struct xfrm_algo_desc *xfrm_ealg_get_byname(const char *name, int probe);
1557extern struct xfrm_algo_desc *xfrm_calg_get_byname(const char *name, int probe);
1558extern struct xfrm_algo_desc *xfrm_aead_get_byname(const char *name, int icv_len,
Herbert Xu1a6509d2008-01-28 19:37:29 -08001559 int probe);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001560
Herbert Xu07d4ee52006-08-20 14:24:50 +10001561struct hash_desc;
Herbert Xu9409f382006-08-06 19:49:12 +10001562struct scatterlist;
Herbert Xu07d4ee52006-08-20 14:24:50 +10001563typedef int (icv_update_fn_t)(struct hash_desc *, struct scatterlist *,
1564 unsigned int);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001565
David S. Millerff6acd12011-02-24 00:19:13 -05001566static inline int xfrm_addr_cmp(const xfrm_address_t *a,
1567 const xfrm_address_t *b,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001568 int family)
1569{
1570 switch (family) {
1571 default:
1572 case AF_INET:
jamala6337462010-02-09 13:21:17 +00001573 return (__force u32)a->a4 - (__force u32)b->a4;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001574 case AF_INET6:
Eric Dumazetb71d1d42011-04-22 04:53:02 +00001575 return ipv6_addr_cmp((const struct in6_addr *)a,
1576 (const struct in6_addr *)b);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001577 }
1578}
1579
Herbert Xu77d8d7a2005-10-05 12:15:12 -07001580static inline int xfrm_policy_id2dir(u32 index)
1581{
1582 return index & 7;
1583}
1584
Alexey Dobriyana6483b72008-11-25 17:38:20 -08001585#ifdef CONFIG_XFRM
1586static inline int xfrm_aevent_is_on(struct net *net)
Jamal Hadi Salimf8cd5482006-03-20 19:15:11 -08001587{
Patrick McHardybe336902006-03-20 22:40:54 -08001588 struct sock *nlsk;
1589 int ret = 0;
1590
1591 rcu_read_lock();
Alexey Dobriyana6483b72008-11-25 17:38:20 -08001592 nlsk = rcu_dereference(net->xfrm.nlsk);
Patrick McHardybe336902006-03-20 22:40:54 -08001593 if (nlsk)
1594 ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS);
1595 rcu_read_unlock();
1596 return ret;
Jamal Hadi Salimf8cd5482006-03-20 19:15:11 -08001597}
Alexey Dobriyana6483b72008-11-25 17:38:20 -08001598#endif
Jamal Hadi Salimf8cd5482006-03-20 19:15:11 -08001599
David S. Miller85158622011-02-27 23:07:02 -08001600static inline int xfrm_alg_len(const struct xfrm_algo *alg)
Eric Dumazet0f99be02008-01-08 23:39:06 -08001601{
1602 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1603}
1604
David S. Miller85158622011-02-27 23:07:02 -08001605static inline int xfrm_alg_auth_len(const struct xfrm_algo_auth *alg)
Martin Willi4447bb32009-11-25 00:29:52 +00001606{
1607 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1608}
1609
Steffen Klassert9736acf2011-03-08 00:05:43 +00001610static inline int xfrm_replay_state_esn_len(struct xfrm_replay_state_esn *replay_esn)
1611{
1612 return sizeof(*replay_esn) + replay_esn->bmp_len * sizeof(__u32);
1613}
1614
Shinta Sugimoto80c9aba2007-02-08 13:11:42 -08001615#ifdef CONFIG_XFRM_MIGRATE
Steffen Klassertaf2f4642011-03-28 19:46:39 +00001616static inline int xfrm_replay_clone(struct xfrm_state *x,
1617 struct xfrm_state *orig)
1618{
1619 x->replay_esn = kzalloc(xfrm_replay_state_esn_len(orig->replay_esn),
1620 GFP_KERNEL);
1621 if (!x->replay_esn)
1622 return -ENOMEM;
1623
1624 x->replay_esn->bmp_len = orig->replay_esn->bmp_len;
1625 x->replay_esn->replay_window = orig->replay_esn->replay_window;
1626
1627 x->preplay_esn = kmemdup(x->replay_esn,
1628 xfrm_replay_state_esn_len(x->replay_esn),
1629 GFP_KERNEL);
1630 if (!x->preplay_esn) {
1631 kfree(x->replay_esn);
1632 return -ENOMEM;
1633 }
1634
1635 return 0;
1636}
1637
Shinta Sugimoto80c9aba2007-02-08 13:11:42 -08001638static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig)
1639{
Eric Dumazet0f99be02008-01-08 23:39:06 -08001640 return kmemdup(orig, xfrm_alg_len(orig), GFP_KERNEL);
Shinta Sugimoto80c9aba2007-02-08 13:11:42 -08001641}
1642
Martin Willi4447bb32009-11-25 00:29:52 +00001643static inline struct xfrm_algo_auth *xfrm_algo_auth_clone(struct xfrm_algo_auth *orig)
1644{
1645 return kmemdup(orig, xfrm_alg_auth_len(orig), GFP_KERNEL);
1646}
1647
Shinta Sugimoto80c9aba2007-02-08 13:11:42 -08001648static inline void xfrm_states_put(struct xfrm_state **states, int n)
1649{
1650 int i;
1651 for (i = 0; i < n; i++)
1652 xfrm_state_put(*(states + i));
1653}
1654
1655static inline void xfrm_states_delete(struct xfrm_state **states, int n)
1656{
1657 int i;
1658 for (i = 0; i < n; i++)
1659 xfrm_state_delete(*(states + i));
1660}
1661#endif
Jamal Hadi Salimf8cd5482006-03-20 19:15:11 -08001662
Alexey Dobriyandef8b4f2008-10-28 13:24:06 -07001663#ifdef CONFIG_XFRM
Herbert Xu00501122007-12-11 01:53:43 -08001664static inline struct xfrm_state *xfrm_input_state(struct sk_buff *skb)
1665{
1666 return skb->sp->xvec[skb->sp->len - 1];
1667}
Alexey Dobriyandef8b4f2008-10-28 13:24:06 -07001668#endif
Herbert Xu00501122007-12-11 01:53:43 -08001669
Jamal Hadi Salimbf825f82010-02-22 11:32:54 +00001670static inline int xfrm_mark_get(struct nlattr **attrs, struct xfrm_mark *m)
1671{
1672 if (attrs[XFRMA_MARK])
Andreas Steffen4efd7e82010-06-30 10:41:15 -07001673 memcpy(m, nla_data(attrs[XFRMA_MARK]), sizeof(struct xfrm_mark));
Jamal Hadi Salimbf825f82010-02-22 11:32:54 +00001674 else
1675 m->v = m->m = 0;
1676
1677 return m->v & m->m;
1678}
1679
David S. Millere3dfa382011-02-27 23:20:19 -08001680static inline int xfrm_mark_put(struct sk_buff *skb, const struct xfrm_mark *m)
Jamal Hadi Salimbf825f82010-02-22 11:32:54 +00001681{
1682 if (m->m | m->v)
1683 NLA_PUT(skb, XFRMA_MARK, sizeof(struct xfrm_mark), m);
1684 return 0;
1685
1686nla_put_failure:
1687 return -1;
1688}
1689
Linus Torvalds1da177e2005-04-16 15:20:36 -07001690#endif /* _NET_XFRM_H */