Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | #ifndef _NET_XFRM_H |
| 2 | #define _NET_XFRM_H |
| 3 | |
Herbert Xu | aabc976 | 2005-05-03 16:27:10 -0700 | [diff] [blame] | 4 | #include <linux/compiler.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5 | #include <linux/xfrm.h> |
| 6 | #include <linux/spinlock.h> |
| 7 | #include <linux/list.h> |
| 8 | #include <linux/skbuff.h> |
Arnaldo Carvalho de Melo | 14c8502 | 2005-12-27 02:43:12 -0200 | [diff] [blame] | 9 | #include <linux/socket.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 10 | #include <linux/pfkeyv2.h> |
Masahide NAKAMURA | 5794708 | 2006-09-22 15:06:24 -0700 | [diff] [blame] | 11 | #include <linux/ipsec.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 12 | #include <linux/in6.h> |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 13 | #include <linux/mutex.h> |
Joy Latten | ab5f5e8 | 2007-09-17 11:51:22 -0700 | [diff] [blame] | 14 | #include <linux/audit.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 15 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 16 | |
| 17 | #include <net/sock.h> |
| 18 | #include <net/dst.h> |
Herbert Xu | 436a0a4 | 2007-10-08 17:25:53 -0700 | [diff] [blame] | 19 | #include <net/ip.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 20 | #include <net/route.h> |
| 21 | #include <net/ipv6.h> |
| 22 | #include <net/ip6_fib.h> |
Yury Polyanskiy | 9e0d57f | 2009-11-08 20:58:41 -0800 | [diff] [blame] | 23 | |
| 24 | #include <linux/interrupt.h> |
| 25 | |
Masahide NAKAMURA | 558f82e | 2007-12-20 20:42:57 -0800 | [diff] [blame] | 26 | #ifdef CONFIG_XFRM_STATISTICS |
| 27 | #include <net/snmp.h> |
| 28 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 29 | |
Masahide NAKAMURA | d3d6dd3 | 2007-06-26 23:57:49 -0700 | [diff] [blame] | 30 | #define XFRM_PROTO_ESP 50 |
| 31 | #define XFRM_PROTO_AH 51 |
| 32 | #define XFRM_PROTO_COMP 108 |
| 33 | #define XFRM_PROTO_IPIP 4 |
| 34 | #define XFRM_PROTO_IPV6 41 |
| 35 | #define XFRM_PROTO_ROUTING IPPROTO_ROUTING |
| 36 | #define XFRM_PROTO_DSTOPTS IPPROTO_DSTOPTS |
| 37 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | #define XFRM_ALIGN8(len) (((len) + 7) & ~7) |
Herbert Xu | b59f45d | 2006-05-27 23:05:54 -0700 | [diff] [blame] | 39 | #define MODULE_ALIAS_XFRM_MODE(family, encap) \ |
| 40 | MODULE_ALIAS("xfrm-mode-" __stringify(family) "-" __stringify(encap)) |
Masahide NAKAMURA | d3d6dd3 | 2007-06-26 23:57:49 -0700 | [diff] [blame] | 41 | #define MODULE_ALIAS_XFRM_TYPE(family, proto) \ |
| 42 | MODULE_ALIAS("xfrm-type-" __stringify(family) "-" __stringify(proto)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | |
Masahide NAKAMURA | 558f82e | 2007-12-20 20:42:57 -0800 | [diff] [blame] | 44 | #ifdef CONFIG_XFRM_STATISTICS |
Alexey Dobriyan | 59c9940 | 2008-11-25 17:59:52 -0800 | [diff] [blame] | 45 | #define XFRM_INC_STATS(net, field) SNMP_INC_STATS((net)->mib.xfrm_statistics, field) |
| 46 | #define XFRM_INC_STATS_BH(net, field) SNMP_INC_STATS_BH((net)->mib.xfrm_statistics, field) |
| 47 | #define XFRM_INC_STATS_USER(net, field) SNMP_INC_STATS_USER((net)-mib.xfrm_statistics, field) |
Masahide NAKAMURA | 558f82e | 2007-12-20 20:42:57 -0800 | [diff] [blame] | 48 | #else |
Alexey Dobriyan | 59c9940 | 2008-11-25 17:59:52 -0800 | [diff] [blame] | 49 | #define XFRM_INC_STATS(net, field) ((void)(net)) |
| 50 | #define XFRM_INC_STATS_BH(net, field) ((void)(net)) |
| 51 | #define XFRM_INC_STATS_USER(net, field) ((void)(net)) |
Masahide NAKAMURA | 558f82e | 2007-12-20 20:42:57 -0800 | [diff] [blame] | 52 | #endif |
| 53 | |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 54 | extern struct mutex xfrm_cfg_mutex; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | |
| 56 | /* Organization of SPD aka "XFRM rules" |
| 57 | ------------------------------------ |
| 58 | |
| 59 | Basic objects: |
| 60 | - policy rule, struct xfrm_policy (=SPD entry) |
| 61 | - bundle of transformations, struct dst_entry == struct xfrm_dst (=SA bundle) |
| 62 | - instance of a transformer, struct xfrm_state (=SA) |
| 63 | - template to clone xfrm_state, struct xfrm_tmpl |
| 64 | |
| 65 | SPD is plain linear list of xfrm_policy rules, ordered by priority. |
| 66 | (To be compatible with existing pfkeyv2 implementations, |
| 67 | many rules with priority of 0x7fffffff are allowed to exist and |
| 68 | such rules are ordered in an unpredictable way, thanks to bsd folks.) |
| 69 | |
| 70 | Lookup is plain linear search until the first match with selector. |
| 71 | |
| 72 | If "action" is "block", then we prohibit the flow, otherwise: |
| 73 | if "xfrms_nr" is zero, the flow passes untransformed. Otherwise, |
| 74 | policy entry has list of up to XFRM_MAX_DEPTH transformations, |
| 75 | described by templates xfrm_tmpl. Each template is resolved |
| 76 | to a complete xfrm_state (see below) and we pack bundle of transformations |
| 77 | to a dst_entry returned to requestor. |
| 78 | |
| 79 | dst -. xfrm .-> xfrm_state #1 |
| 80 | |---. child .-> dst -. xfrm .-> xfrm_state #2 |
| 81 | |---. child .-> dst -. xfrm .-> xfrm_state #3 |
| 82 | |---. child .-> NULL |
| 83 | |
| 84 | Bundles are cached at xrfm_policy struct (field ->bundles). |
| 85 | |
| 86 | |
| 87 | Resolution of xrfm_tmpl |
| 88 | ----------------------- |
| 89 | Template contains: |
| 90 | 1. ->mode Mode: transport or tunnel |
| 91 | 2. ->id.proto Protocol: AH/ESP/IPCOMP |
| 92 | 3. ->id.daddr Remote tunnel endpoint, ignored for transport mode. |
| 93 | Q: allow to resolve security gateway? |
| 94 | 4. ->id.spi If not zero, static SPI. |
| 95 | 5. ->saddr Local tunnel endpoint, ignored for transport mode. |
| 96 | 6. ->algos List of allowed algos. Plain bitmask now. |
| 97 | Q: ealgos, aalgos, calgos. What a mess... |
| 98 | 7. ->share Sharing mode. |
| 99 | Q: how to implement private sharing mode? To add struct sock* to |
| 100 | flow id? |
| 101 | |
| 102 | Having this template we search through SAD searching for entries |
| 103 | with appropriate mode/proto/algo, permitted by selector. |
| 104 | If no appropriate entry found, it is requested from key manager. |
| 105 | |
| 106 | PROBLEMS: |
| 107 | Q: How to find all the bundles referring to a physical path for |
| 108 | PMTU discovery? Seems, dst should contain list of all parents... |
| 109 | and enter to infinite locking hierarchy disaster. |
| 110 | No! It is easier, we will not search for them, let them find us. |
| 111 | We add genid to each dst plus pointer to genid of raw IP route, |
| 112 | pmtu disc will update pmtu on raw IP route and increase its genid. |
| 113 | dst_check() will see this for top level and trigger resyncing |
| 114 | metrics. Plus, it will be made via sk->sk_dst_cache. Solved. |
| 115 | */ |
| 116 | |
Herbert Xu | 12a169e | 2008-10-01 07:03:24 -0700 | [diff] [blame] | 117 | struct xfrm_state_walk { |
| 118 | struct list_head all; |
| 119 | u8 state; |
| 120 | union { |
| 121 | u8 dying; |
| 122 | u8 proto; |
| 123 | }; |
| 124 | u32 seq; |
| 125 | }; |
| 126 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 127 | /* Full description of state of transformer. */ |
Eric Dumazet | fd2c3ef | 2009-11-03 03:26:03 +0000 | [diff] [blame] | 128 | struct xfrm_state { |
Alexey Dobriyan | 673c09b | 2008-11-25 17:15:16 -0800 | [diff] [blame] | 129 | #ifdef CONFIG_NET_NS |
| 130 | struct net *xs_net; |
| 131 | #endif |
Herbert Xu | abb81c4 | 2008-09-09 19:58:29 -0700 | [diff] [blame] | 132 | union { |
Herbert Xu | 12a169e | 2008-10-01 07:03:24 -0700 | [diff] [blame] | 133 | struct hlist_node gclist; |
Herbert Xu | abb81c4 | 2008-09-09 19:58:29 -0700 | [diff] [blame] | 134 | struct hlist_node bydst; |
| 135 | }; |
David S. Miller | 8f126e3 | 2006-08-24 02:45:07 -0700 | [diff] [blame] | 136 | struct hlist_node bysrc; |
| 137 | struct hlist_node byspi; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 138 | |
| 139 | atomic_t refcnt; |
| 140 | spinlock_t lock; |
| 141 | |
| 142 | struct xfrm_id id; |
| 143 | struct xfrm_selector sel; |
Jamal Hadi Salim | bf825f81 | 2010-02-22 11:32:54 +0000 | [diff] [blame] | 144 | struct xfrm_mark mark; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 145 | |
David S. Miller | 9d4a706 | 2006-08-24 03:18:09 -0700 | [diff] [blame] | 146 | u32 genid; |
| 147 | |
Herbert Xu | 12a169e | 2008-10-01 07:03:24 -0700 | [diff] [blame] | 148 | /* Key manager bits */ |
| 149 | struct xfrm_state_walk km; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 150 | |
| 151 | /* Parameters of this state. */ |
| 152 | struct { |
| 153 | u32 reqid; |
| 154 | u8 mode; |
| 155 | u8 replay_window; |
| 156 | u8 aalgo, ealgo, calgo; |
| 157 | u8 flags; |
| 158 | u16 family; |
| 159 | xfrm_address_t saddr; |
| 160 | int header_len; |
| 161 | int trailer_len; |
| 162 | } props; |
| 163 | |
| 164 | struct xfrm_lifetime_cfg lft; |
| 165 | |
| 166 | /* Data for transformer */ |
Martin Willi | 4447bb3 | 2009-11-25 00:29:52 +0000 | [diff] [blame] | 167 | struct xfrm_algo_auth *aalg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 168 | struct xfrm_algo *ealg; |
| 169 | struct xfrm_algo *calg; |
Herbert Xu | 1a6509d | 2008-01-28 19:37:29 -0800 | [diff] [blame] | 170 | struct xfrm_algo_aead *aead; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 171 | |
| 172 | /* Data for encapsulator */ |
| 173 | struct xfrm_encap_tmpl *encap; |
| 174 | |
Noriaki TAKAMIYA | 060f02a | 2006-08-23 18:18:55 -0700 | [diff] [blame] | 175 | /* Data for care-of address */ |
| 176 | xfrm_address_t *coaddr; |
| 177 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 178 | /* IPComp needs an IPIP tunnel for handling uncompressed packets */ |
| 179 | struct xfrm_state *tunnel; |
| 180 | |
| 181 | /* If a tunnel, number of users + 1 */ |
| 182 | atomic_t tunnel_users; |
| 183 | |
| 184 | /* State for replay detection */ |
| 185 | struct xfrm_replay_state replay; |
| 186 | |
Jamal Hadi Salim | f8cd548 | 2006-03-20 19:15:11 -0800 | [diff] [blame] | 187 | /* Replay detection state at the time we sent the last notification */ |
| 188 | struct xfrm_replay_state preplay; |
| 189 | |
Jamal Hadi Salim | 2717096 | 2006-04-14 15:03:05 -0700 | [diff] [blame] | 190 | /* internal flag that only holds state for delayed aevent at the |
| 191 | * moment |
| 192 | */ |
| 193 | u32 xflags; |
| 194 | |
Jamal Hadi Salim | f8cd548 | 2006-03-20 19:15:11 -0800 | [diff] [blame] | 195 | /* Replay detection notification settings */ |
| 196 | u32 replay_maxage; |
| 197 | u32 replay_maxdiff; |
| 198 | |
| 199 | /* Replay detection notification timer */ |
| 200 | struct timer_list rtimer; |
| 201 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 202 | /* Statistics */ |
| 203 | struct xfrm_stats stats; |
| 204 | |
| 205 | struct xfrm_lifetime_cur curlft; |
Yury Polyanskiy | 9e0d57f | 2009-11-08 20:58:41 -0800 | [diff] [blame] | 206 | struct tasklet_hrtimer mtimer; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 207 | |
Masahide NAKAMURA | 9afaca0 | 2006-08-23 18:20:16 -0700 | [diff] [blame] | 208 | /* Last used time */ |
Herbert Xu | d26f398 | 2007-11-13 21:47:08 -0800 | [diff] [blame] | 209 | unsigned long lastused; |
Masahide NAKAMURA | 9afaca0 | 2006-08-23 18:20:16 -0700 | [diff] [blame] | 210 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 211 | /* Reference to data common to all the instances of this |
| 212 | * transformer. */ |
Eric Dumazet | 533cb5b | 2008-01-30 19:11:50 -0800 | [diff] [blame] | 213 | const struct xfrm_type *type; |
Herbert Xu | 1399637 | 2007-10-17 21:35:51 -0700 | [diff] [blame] | 214 | struct xfrm_mode *inner_mode; |
Kazunori MIYAZAWA | df9dcb4 | 2008-03-24 14:51:51 -0700 | [diff] [blame] | 215 | struct xfrm_mode *inner_mode_iaf; |
Herbert Xu | 1399637 | 2007-10-17 21:35:51 -0700 | [diff] [blame] | 216 | struct xfrm_mode *outer_mode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 217 | |
Trent Jaeger | df71837 | 2005-12-13 23:12:27 -0800 | [diff] [blame] | 218 | /* Security context */ |
| 219 | struct xfrm_sec_ctx *security; |
| 220 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 221 | /* Private data of this transformer, format is opaque, |
| 222 | * interpreted by xfrm_type methods. */ |
| 223 | void *data; |
| 224 | }; |
| 225 | |
Alexey Dobriyan | 673c09b | 2008-11-25 17:15:16 -0800 | [diff] [blame] | 226 | static inline struct net *xs_net(struct xfrm_state *x) |
| 227 | { |
| 228 | return read_pnet(&x->xs_net); |
| 229 | } |
| 230 | |
Jamal Hadi Salim | 2717096 | 2006-04-14 15:03:05 -0700 | [diff] [blame] | 231 | /* xflags - make enum if more show up */ |
| 232 | #define XFRM_TIME_DEFER 1 |
| 233 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 234 | enum { |
| 235 | XFRM_STATE_VOID, |
| 236 | XFRM_STATE_ACQ, |
| 237 | XFRM_STATE_VALID, |
| 238 | XFRM_STATE_ERROR, |
| 239 | XFRM_STATE_EXPIRED, |
| 240 | XFRM_STATE_DEAD |
| 241 | }; |
| 242 | |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 243 | /* callback structure passed from either netlink or pfkey */ |
Eric Dumazet | fd2c3ef | 2009-11-03 03:26:03 +0000 | [diff] [blame] | 244 | struct km_event { |
Herbert Xu | bf08867 | 2005-06-18 22:44:00 -0700 | [diff] [blame] | 245 | union { |
| 246 | u32 hard; |
| 247 | u32 proto; |
| 248 | u32 byid; |
Jamal Hadi Salim | f8cd548 | 2006-03-20 19:15:11 -0800 | [diff] [blame] | 249 | u32 aevent; |
Masahide NAKAMURA | f7b6983 | 2006-08-23 22:49:28 -0700 | [diff] [blame] | 250 | u32 type; |
Herbert Xu | bf08867 | 2005-06-18 22:44:00 -0700 | [diff] [blame] | 251 | } data; |
| 252 | |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 253 | u32 seq; |
| 254 | u32 pid; |
| 255 | u32 event; |
Alexey Dobriyan | 7067802 | 2008-11-25 17:50:36 -0800 | [diff] [blame] | 256 | struct net *net; |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 257 | }; |
| 258 | |
Herbert Xu | 25ee328 | 2007-12-11 09:32:34 -0800 | [diff] [blame] | 259 | struct net_device; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 260 | struct xfrm_type; |
| 261 | struct xfrm_dst; |
| 262 | struct xfrm_policy_afinfo { |
| 263 | unsigned short family; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 264 | struct dst_ops *dst_ops; |
Alexey Dobriyan | ddcfd79 | 2008-11-25 17:37:23 -0800 | [diff] [blame] | 265 | void (*garbage_collect)(struct net *net); |
Alexey Dobriyan | c5b3cf4 | 2008-11-25 17:51:25 -0800 | [diff] [blame] | 266 | struct dst_entry *(*dst_lookup)(struct net *net, int tos, |
| 267 | xfrm_address_t *saddr, |
Herbert Xu | 66cdb3c | 2007-11-13 21:37:28 -0800 | [diff] [blame] | 268 | xfrm_address_t *daddr); |
Alexey Dobriyan | fbda33b | 2008-11-25 17:56:49 -0800 | [diff] [blame] | 269 | int (*get_saddr)(struct net *net, xfrm_address_t *saddr, xfrm_address_t *daddr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 270 | struct dst_entry *(*find_bundle)(struct flowi *fl, struct xfrm_policy *policy); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 271 | void (*decode_session)(struct sk_buff *skb, |
Herbert Xu | d5422ef | 2007-12-12 10:44:16 -0800 | [diff] [blame] | 272 | struct flowi *fl, |
| 273 | int reverse); |
Herbert Xu | 25ee328 | 2007-12-11 09:32:34 -0800 | [diff] [blame] | 274 | int (*get_tos)(struct flowi *fl); |
Masahide NAKAMURA | a1b0514 | 2007-12-20 20:41:12 -0800 | [diff] [blame] | 275 | int (*init_path)(struct xfrm_dst *path, |
| 276 | struct dst_entry *dst, |
| 277 | int nfheader_len); |
Herbert Xu | 25ee328 | 2007-12-11 09:32:34 -0800 | [diff] [blame] | 278 | int (*fill_dst)(struct xfrm_dst *xdst, |
Herbert Xu | 87c1e12 | 2010-03-02 02:51:56 +0000 | [diff] [blame] | 279 | struct net_device *dev, |
| 280 | struct flowi *fl); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 281 | }; |
| 282 | |
| 283 | extern int xfrm_policy_register_afinfo(struct xfrm_policy_afinfo *afinfo); |
| 284 | extern int xfrm_policy_unregister_afinfo(struct xfrm_policy_afinfo *afinfo); |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 285 | extern void km_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c); |
| 286 | extern void km_state_notify(struct xfrm_state *x, struct km_event *c); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 287 | |
| 288 | struct xfrm_tmpl; |
Jamal Hadi Salim | 980ebd2 | 2006-03-20 19:16:40 -0800 | [diff] [blame] | 289 | extern int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol); |
Jamal Hadi Salim | 53bc6b4 | 2006-03-20 19:17:03 -0800 | [diff] [blame] | 290 | extern void km_state_expired(struct xfrm_state *x, int hard, u32 pid); |
| 291 | extern int __xfrm_state_delete(struct xfrm_state *x); |
| 292 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 293 | struct xfrm_state_afinfo { |
Herbert Xu | 17c2a42 | 2007-10-17 21:33:12 -0700 | [diff] [blame] | 294 | unsigned int family; |
Herbert Xu | 36cf9ac | 2007-11-13 21:40:52 -0800 | [diff] [blame] | 295 | unsigned int proto; |
Al Viro | 8e3d716 | 2008-03-17 22:49:16 -0700 | [diff] [blame] | 296 | __be16 eth_proto; |
Herbert Xu | 17c2a42 | 2007-10-17 21:33:12 -0700 | [diff] [blame] | 297 | struct module *owner; |
Eric Dumazet | 533cb5b | 2008-01-30 19:11:50 -0800 | [diff] [blame] | 298 | const struct xfrm_type *type_map[IPPROTO_MAX]; |
Herbert Xu | aa5d62c | 2007-10-17 21:31:12 -0700 | [diff] [blame] | 299 | struct xfrm_mode *mode_map[XFRM_MODE_MAX]; |
Herbert Xu | d094cd8 | 2005-06-20 13:19:41 -0700 | [diff] [blame] | 300 | int (*init_flags)(struct xfrm_state *x); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 301 | void (*init_tempsel)(struct xfrm_state *x, struct flowi *fl, |
| 302 | struct xfrm_tmpl *tmpl, |
| 303 | xfrm_address_t *daddr, xfrm_address_t *saddr); |
Masahide NAKAMURA | 41a49cc | 2006-08-23 22:48:31 -0700 | [diff] [blame] | 304 | int (*tmpl_sort)(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n); |
| 305 | int (*state_sort)(struct xfrm_state **dst, struct xfrm_state **src, int n); |
Miika Komu | cdca726 | 2007-02-06 14:24:56 -0800 | [diff] [blame] | 306 | int (*output)(struct sk_buff *skb); |
Herbert Xu | 227620e | 2007-11-13 21:41:28 -0800 | [diff] [blame] | 307 | int (*extract_input)(struct xfrm_state *x, |
| 308 | struct sk_buff *skb); |
Herbert Xu | 36cf9ac | 2007-11-13 21:40:52 -0800 | [diff] [blame] | 309 | int (*extract_output)(struct xfrm_state *x, |
| 310 | struct sk_buff *skb); |
Herbert Xu | 716062f | 2007-11-13 21:44:23 -0800 | [diff] [blame] | 311 | int (*transport_finish)(struct sk_buff *skb, |
| 312 | int async); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 313 | }; |
| 314 | |
| 315 | extern int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo); |
| 316 | extern int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo); |
| 317 | |
| 318 | extern void xfrm_state_delete_tunnel(struct xfrm_state *x); |
| 319 | |
Eric Dumazet | fd2c3ef | 2009-11-03 03:26:03 +0000 | [diff] [blame] | 320 | struct xfrm_type { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 321 | char *description; |
| 322 | struct module *owner; |
jamal | a633746 | 2010-02-09 13:21:17 +0000 | [diff] [blame] | 323 | u8 proto; |
| 324 | u8 flags; |
Masahide NAKAMURA | 1b5c229 | 2006-08-23 18:11:50 -0700 | [diff] [blame] | 325 | #define XFRM_TYPE_NON_FRAGMENT 1 |
Herbert Xu | 436a0a4 | 2007-10-08 17:25:53 -0700 | [diff] [blame] | 326 | #define XFRM_TYPE_REPLAY_PROT 2 |
Herbert Xu | f04e7e8 | 2007-11-13 21:36:51 -0800 | [diff] [blame] | 327 | #define XFRM_TYPE_LOCAL_COADDR 4 |
| 328 | #define XFRM_TYPE_REMOTE_COADDR 8 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 329 | |
Herbert Xu | 72cb696 | 2005-06-20 13:18:08 -0700 | [diff] [blame] | 330 | int (*init_state)(struct xfrm_state *x); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 331 | void (*destructor)(struct xfrm_state *); |
Herbert Xu | e695633 | 2006-04-01 00:52:46 -0800 | [diff] [blame] | 332 | int (*input)(struct xfrm_state *, struct sk_buff *skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 333 | int (*output)(struct xfrm_state *, struct sk_buff *pskb); |
Masahide NAKAMURA | df0ba92 | 2006-08-23 20:41:00 -0700 | [diff] [blame] | 334 | int (*reject)(struct xfrm_state *, struct sk_buff *, struct flowi *); |
Masahide NAKAMURA | aee5adb | 2006-08-23 17:57:28 -0700 | [diff] [blame] | 335 | int (*hdr_offset)(struct xfrm_state *, struct sk_buff *, u8 **); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 336 | /* Estimate maximal size of result of transformation of a dgram */ |
Patrick McHardy | c5c2523 | 2007-04-09 11:47:18 -0700 | [diff] [blame] | 337 | u32 (*get_mtu)(struct xfrm_state *, int size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 338 | }; |
| 339 | |
Eric Dumazet | 533cb5b | 2008-01-30 19:11:50 -0800 | [diff] [blame] | 340 | extern int xfrm_register_type(const struct xfrm_type *type, unsigned short family); |
| 341 | extern int xfrm_unregister_type(const struct xfrm_type *type, unsigned short family); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 342 | |
Herbert Xu | b59f45d | 2006-05-27 23:05:54 -0700 | [diff] [blame] | 343 | struct xfrm_mode { |
Herbert Xu | 227620e | 2007-11-13 21:41:28 -0800 | [diff] [blame] | 344 | /* |
| 345 | * Remove encapsulation header. |
| 346 | * |
| 347 | * The IP header will be moved over the top of the encapsulation |
| 348 | * header. |
| 349 | * |
| 350 | * On entry, the transport header shall point to where the IP header |
| 351 | * should be and the network header shall be set to where the IP |
| 352 | * header currently is. skb->data shall point to the start of the |
| 353 | * payload. |
| 354 | */ |
| 355 | int (*input2)(struct xfrm_state *x, struct sk_buff *skb); |
| 356 | |
| 357 | /* |
| 358 | * This is the actual input entry point. |
| 359 | * |
| 360 | * For transport mode and equivalent this would be identical to |
| 361 | * input2 (which does not need to be set). While tunnel mode |
| 362 | * and equivalent would set this to the tunnel encapsulation function |
| 363 | * xfrm4_prepare_input that would in turn call input2. |
| 364 | */ |
Herbert Xu | b59f45d | 2006-05-27 23:05:54 -0700 | [diff] [blame] | 365 | int (*input)(struct xfrm_state *x, struct sk_buff *skb); |
Herbert Xu | 37fedd3 | 2007-10-10 15:44:44 -0700 | [diff] [blame] | 366 | |
| 367 | /* |
| 368 | * Add encapsulation header. |
| 369 | * |
| 370 | * On exit, the transport header will be set to the start of the |
| 371 | * encapsulation header to be filled in by x->type->output and |
| 372 | * the mac header will be set to the nextheader (protocol for |
| 373 | * IPv4) field of the extension header directly preceding the |
| 374 | * encapsulation header, or in its absence, that of the top IP |
| 375 | * header. The value of the network header will always point |
| 376 | * to the top IP header while skb->data will point to the payload. |
| 377 | */ |
Herbert Xu | 36cf9ac | 2007-11-13 21:40:52 -0800 | [diff] [blame] | 378 | int (*output2)(struct xfrm_state *x,struct sk_buff *skb); |
| 379 | |
| 380 | /* |
| 381 | * This is the actual output entry point. |
| 382 | * |
| 383 | * For transport mode and equivalent this would be identical to |
| 384 | * output2 (which does not need to be set). While tunnel mode |
| 385 | * and equivalent would set this to a tunnel encapsulation function |
| 386 | * (xfrm4_prepare_output or xfrm6_prepare_output) that would in turn |
| 387 | * call output2. |
| 388 | */ |
| 389 | int (*output)(struct xfrm_state *x, struct sk_buff *skb); |
Herbert Xu | b59f45d | 2006-05-27 23:05:54 -0700 | [diff] [blame] | 390 | |
Herbert Xu | 17c2a42 | 2007-10-17 21:33:12 -0700 | [diff] [blame] | 391 | struct xfrm_state_afinfo *afinfo; |
Herbert Xu | b59f45d | 2006-05-27 23:05:54 -0700 | [diff] [blame] | 392 | struct module *owner; |
| 393 | unsigned int encap; |
Herbert Xu | 1bfcb10 | 2007-10-17 21:31:50 -0700 | [diff] [blame] | 394 | int flags; |
| 395 | }; |
| 396 | |
| 397 | /* Flags for xfrm_mode. */ |
| 398 | enum { |
| 399 | XFRM_MODE_FLAG_TUNNEL = 1, |
Herbert Xu | b59f45d | 2006-05-27 23:05:54 -0700 | [diff] [blame] | 400 | }; |
| 401 | |
| 402 | extern int xfrm_register_mode(struct xfrm_mode *mode, int family); |
| 403 | extern int xfrm_unregister_mode(struct xfrm_mode *mode, int family); |
Herbert Xu | b59f45d | 2006-05-27 23:05:54 -0700 | [diff] [blame] | 404 | |
Kazunori MIYAZAWA | df9dcb4 | 2008-03-24 14:51:51 -0700 | [diff] [blame] | 405 | static inline int xfrm_af2proto(unsigned int family) |
| 406 | { |
| 407 | switch(family) { |
| 408 | case AF_INET: |
| 409 | return IPPROTO_IPIP; |
| 410 | case AF_INET6: |
| 411 | return IPPROTO_IPV6; |
| 412 | default: |
| 413 | return 0; |
| 414 | } |
| 415 | } |
| 416 | |
| 417 | static inline struct xfrm_mode *xfrm_ip2inner_mode(struct xfrm_state *x, int ipproto) |
| 418 | { |
| 419 | if ((ipproto == IPPROTO_IPIP && x->props.family == AF_INET) || |
| 420 | (ipproto == IPPROTO_IPV6 && x->props.family == AF_INET6)) |
| 421 | return x->inner_mode; |
| 422 | else |
| 423 | return x->inner_mode_iaf; |
| 424 | } |
| 425 | |
Eric Dumazet | fd2c3ef | 2009-11-03 03:26:03 +0000 | [diff] [blame] | 426 | struct xfrm_tmpl { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 427 | /* id in template is interpreted as: |
| 428 | * daddr - destination of tunnel, may be zero for transport mode. |
| 429 | * spi - zero to acquire spi. Not zero if spi is static, then |
| 430 | * daddr must be fixed too. |
| 431 | * proto - AH/ESP/IPCOMP |
| 432 | */ |
| 433 | struct xfrm_id id; |
| 434 | |
| 435 | /* Source address of tunnel. Ignored, if it is not a tunnel. */ |
| 436 | xfrm_address_t saddr; |
| 437 | |
Miika Komu | 76b3f05 | 2006-11-30 16:40:43 -0800 | [diff] [blame] | 438 | unsigned short encap_family; |
| 439 | |
jamal | a633746 | 2010-02-09 13:21:17 +0000 | [diff] [blame] | 440 | u32 reqid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 441 | |
Masahide NAKAMURA | 7e49e6d | 2006-09-22 15:05:15 -0700 | [diff] [blame] | 442 | /* Mode: transport, tunnel etc. */ |
jamal | a633746 | 2010-02-09 13:21:17 +0000 | [diff] [blame] | 443 | u8 mode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 444 | |
| 445 | /* Sharing mode: unique, this session only, this user only etc. */ |
jamal | a633746 | 2010-02-09 13:21:17 +0000 | [diff] [blame] | 446 | u8 share; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 447 | |
| 448 | /* May skip this transfomration if no SA is found */ |
jamal | a633746 | 2010-02-09 13:21:17 +0000 | [diff] [blame] | 449 | u8 optional; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 450 | |
Herbert Xu | c5d18e9 | 2008-04-22 00:46:42 -0700 | [diff] [blame] | 451 | /* Skip aalgos/ealgos/calgos checks. */ |
jamal | a633746 | 2010-02-09 13:21:17 +0000 | [diff] [blame] | 452 | u8 allalgs; |
Herbert Xu | c5d18e9 | 2008-04-22 00:46:42 -0700 | [diff] [blame] | 453 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 454 | /* Bit mask of algos allowed for acquisition */ |
jamal | a633746 | 2010-02-09 13:21:17 +0000 | [diff] [blame] | 455 | u32 aalgos; |
| 456 | u32 ealgos; |
| 457 | u32 calgos; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 458 | }; |
| 459 | |
Masahide NAKAMURA | 622dc82 | 2006-08-23 17:52:01 -0700 | [diff] [blame] | 460 | #define XFRM_MAX_DEPTH 6 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 461 | |
Herbert Xu | 12a169e | 2008-10-01 07:03:24 -0700 | [diff] [blame] | 462 | struct xfrm_policy_walk_entry { |
| 463 | struct list_head all; |
| 464 | u8 dead; |
| 465 | }; |
| 466 | |
| 467 | struct xfrm_policy_walk { |
| 468 | struct xfrm_policy_walk_entry walk; |
| 469 | u8 type; |
| 470 | u32 seq; |
| 471 | }; |
| 472 | |
Eric Dumazet | fd2c3ef | 2009-11-03 03:26:03 +0000 | [diff] [blame] | 473 | struct xfrm_policy { |
Alexey Dobriyan | 0331b1f | 2008-11-25 17:21:45 -0800 | [diff] [blame] | 474 | #ifdef CONFIG_NET_NS |
| 475 | struct net *xp_net; |
| 476 | #endif |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 477 | struct hlist_node bydst; |
| 478 | struct hlist_node byidx; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 479 | |
| 480 | /* This lock only affects elements except for entry. */ |
| 481 | rwlock_t lock; |
| 482 | atomic_t refcnt; |
| 483 | struct timer_list timer; |
| 484 | |
| 485 | u32 priority; |
| 486 | u32 index; |
Jamal Hadi Salim | bf825f81 | 2010-02-22 11:32:54 +0000 | [diff] [blame] | 487 | struct xfrm_mark mark; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 488 | struct xfrm_selector selector; |
| 489 | struct xfrm_lifetime_cfg lft; |
| 490 | struct xfrm_lifetime_cur curlft; |
| 491 | struct dst_entry *bundles; |
Herbert Xu | 12a169e | 2008-10-01 07:03:24 -0700 | [diff] [blame] | 492 | struct xfrm_policy_walk_entry walk; |
Arnaldo Carvalho de Melo | 46ca5f5 | 2006-11-27 17:58:59 -0200 | [diff] [blame] | 493 | u8 type; |
| 494 | u8 action; |
| 495 | u8 flags; |
Arnaldo Carvalho de Melo | 46ca5f5 | 2006-11-27 17:58:59 -0200 | [diff] [blame] | 496 | u8 xfrm_nr; |
Herbert Xu | 12a169e | 2008-10-01 07:03:24 -0700 | [diff] [blame] | 497 | u16 family; |
Trent Jaeger | df71837 | 2005-12-13 23:12:27 -0800 | [diff] [blame] | 498 | struct xfrm_sec_ctx *security; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 499 | struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH]; |
| 500 | }; |
| 501 | |
Alexey Dobriyan | 0331b1f | 2008-11-25 17:21:45 -0800 | [diff] [blame] | 502 | static inline struct net *xp_net(struct xfrm_policy *xp) |
| 503 | { |
| 504 | return read_pnet(&xp->xp_net); |
| 505 | } |
| 506 | |
Arnaud Ebalard | 13c1d18 | 2008-10-05 13:33:42 -0700 | [diff] [blame] | 507 | struct xfrm_kmaddress { |
| 508 | xfrm_address_t local; |
| 509 | xfrm_address_t remote; |
| 510 | u32 reserved; |
| 511 | u16 family; |
| 512 | }; |
| 513 | |
Shinta Sugimoto | 80c9aba | 2007-02-08 13:11:42 -0800 | [diff] [blame] | 514 | struct xfrm_migrate { |
| 515 | xfrm_address_t old_daddr; |
| 516 | xfrm_address_t old_saddr; |
| 517 | xfrm_address_t new_daddr; |
| 518 | xfrm_address_t new_saddr; |
| 519 | u8 proto; |
| 520 | u8 mode; |
| 521 | u16 reserved; |
| 522 | u32 reqid; |
| 523 | u16 old_family; |
| 524 | u16 new_family; |
| 525 | }; |
| 526 | |
Jamal Hadi Salim | f8cd548 | 2006-03-20 19:15:11 -0800 | [diff] [blame] | 527 | #define XFRM_KM_TIMEOUT 30 |
| 528 | /* which seqno */ |
| 529 | #define XFRM_REPLAY_SEQ 1 |
| 530 | #define XFRM_REPLAY_OSEQ 2 |
| 531 | #define XFRM_REPLAY_SEQ_MASK 3 |
| 532 | /* what happened */ |
| 533 | #define XFRM_REPLAY_UPDATE XFRM_AE_CR |
| 534 | #define XFRM_REPLAY_TIMEOUT XFRM_AE_CE |
| 535 | |
| 536 | /* default aevent timeout in units of 100ms */ |
| 537 | #define XFRM_AE_ETIME 10 |
| 538 | /* Async Event timer multiplier */ |
| 539 | #define XFRM_AE_ETH_M 10 |
| 540 | /* default seq threshold size */ |
| 541 | #define XFRM_AE_SEQT_SIZE 2 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 542 | |
Eric Dumazet | fd2c3ef | 2009-11-03 03:26:03 +0000 | [diff] [blame] | 543 | struct xfrm_mgr { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 544 | struct list_head list; |
| 545 | char *id; |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 546 | int (*notify)(struct xfrm_state *x, struct km_event *c); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 547 | int (*acquire)(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *xp, int dir); |
Venkat Yekkirala | cb969f0 | 2006-07-24 23:32:20 -0700 | [diff] [blame] | 548 | struct xfrm_policy *(*compile_policy)(struct sock *sk, int opt, u8 *data, int len, int *dir); |
Al Viro | 5d36b18 | 2006-11-08 00:24:06 -0800 | [diff] [blame] | 549 | int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 550 | int (*notify_policy)(struct xfrm_policy *x, int dir, struct km_event *c); |
Alexey Dobriyan | db983c1 | 2008-11-25 17:51:01 -0800 | [diff] [blame] | 551 | int (*report)(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr); |
Arnaud Ebalard | 13c1d18 | 2008-10-05 13:33:42 -0700 | [diff] [blame] | 552 | int (*migrate)(struct xfrm_selector *sel, u8 dir, u8 type, struct xfrm_migrate *m, int num_bundles, struct xfrm_kmaddress *k); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 553 | }; |
| 554 | |
| 555 | extern int xfrm_register_km(struct xfrm_mgr *km); |
| 556 | extern int xfrm_unregister_km(struct xfrm_mgr *km); |
| 557 | |
Herbert Xu | 436a0a4 | 2007-10-08 17:25:53 -0700 | [diff] [blame] | 558 | /* |
| 559 | * This structure is used for the duration where packets are being |
| 560 | * transformed by IPsec. As soon as the packet leaves IPsec the |
| 561 | * area beyond the generic IP part may be overwritten. |
| 562 | */ |
| 563 | struct xfrm_skb_cb { |
| 564 | union { |
| 565 | struct inet_skb_parm h4; |
| 566 | struct inet6_skb_parm h6; |
| 567 | } header; |
| 568 | |
| 569 | /* Sequence number for replay protection. */ |
Herbert Xu | b318e0e | 2008-02-12 22:50:35 -0800 | [diff] [blame] | 570 | union { |
| 571 | u64 output; |
| 572 | __be32 input; |
| 573 | } seq; |
Herbert Xu | 436a0a4 | 2007-10-08 17:25:53 -0700 | [diff] [blame] | 574 | }; |
| 575 | |
| 576 | #define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0])) |
| 577 | |
Herbert Xu | 36cf9ac | 2007-11-13 21:40:52 -0800 | [diff] [blame] | 578 | /* |
| 579 | * This structure is used by the afinfo prepare_input/prepare_output functions |
| 580 | * to transmit header information to the mode input/output functions. |
| 581 | */ |
| 582 | struct xfrm_mode_skb_cb { |
| 583 | union { |
| 584 | struct inet_skb_parm h4; |
| 585 | struct inet6_skb_parm h6; |
| 586 | } header; |
| 587 | |
| 588 | /* Copied from header for IPv4, always set to zero and DF for IPv6. */ |
| 589 | __be16 id; |
| 590 | __be16 frag_off; |
| 591 | |
Herbert Xu | 732c8bd | 2008-03-26 16:51:09 -0700 | [diff] [blame] | 592 | /* IP header length (excluding options or extension headers). */ |
| 593 | u8 ihl; |
| 594 | |
Herbert Xu | 36cf9ac | 2007-11-13 21:40:52 -0800 | [diff] [blame] | 595 | /* TOS for IPv4, class for IPv6. */ |
| 596 | u8 tos; |
| 597 | |
| 598 | /* TTL for IPv4, hop limitfor IPv6. */ |
| 599 | u8 ttl; |
| 600 | |
| 601 | /* Protocol for IPv4, NH for IPv6. */ |
| 602 | u8 protocol; |
| 603 | |
Herbert Xu | 732c8bd | 2008-03-26 16:51:09 -0700 | [diff] [blame] | 604 | /* Option length for IPv4, zero for IPv6. */ |
| 605 | u8 optlen; |
| 606 | |
Herbert Xu | 36cf9ac | 2007-11-13 21:40:52 -0800 | [diff] [blame] | 607 | /* Used by IPv6 only, zero for IPv4. */ |
| 608 | u8 flow_lbl[3]; |
| 609 | }; |
| 610 | |
| 611 | #define XFRM_MODE_SKB_CB(__skb) ((struct xfrm_mode_skb_cb *)&((__skb)->cb[0])) |
| 612 | |
Herbert Xu | 716062f | 2007-11-13 21:44:23 -0800 | [diff] [blame] | 613 | /* |
| 614 | * This structure is used by the input processing to locate the SPI and |
| 615 | * related information. |
| 616 | */ |
| 617 | struct xfrm_spi_skb_cb { |
| 618 | union { |
| 619 | struct inet_skb_parm h4; |
| 620 | struct inet6_skb_parm h6; |
| 621 | } header; |
| 622 | |
Herbert Xu | 716062f | 2007-11-13 21:44:23 -0800 | [diff] [blame] | 623 | unsigned int daddroff; |
Herbert Xu | 2fcb45b | 2007-12-03 22:54:12 -0800 | [diff] [blame] | 624 | unsigned int family; |
Herbert Xu | 716062f | 2007-11-13 21:44:23 -0800 | [diff] [blame] | 625 | }; |
| 626 | |
| 627 | #define XFRM_SPI_SKB_CB(__skb) ((struct xfrm_spi_skb_cb *)&((__skb)->cb[0])) |
| 628 | |
Joy Latten | 161a09e | 2006-11-27 13:11:54 -0600 | [diff] [blame] | 629 | /* Audit Information */ |
Eric Dumazet | fd2c3ef | 2009-11-03 03:26:03 +0000 | [diff] [blame] | 630 | struct xfrm_audit { |
Joy Latten | 161a09e | 2006-11-27 13:11:54 -0600 | [diff] [blame] | 631 | u32 secid; |
Eric Paris | 2532386 | 2008-04-18 10:09:25 -0400 | [diff] [blame] | 632 | uid_t loginuid; |
| 633 | u32 sessionid; |
Joy Latten | 161a09e | 2006-11-27 13:11:54 -0600 | [diff] [blame] | 634 | }; |
Joy Latten | c9204d9 | 2006-11-30 15:50:43 -0600 | [diff] [blame] | 635 | |
| 636 | #ifdef CONFIG_AUDITSYSCALL |
Paul Moore | afeb14b | 2007-12-21 14:58:11 -0800 | [diff] [blame] | 637 | static inline struct audit_buffer *xfrm_audit_start(const char *op) |
Joy Latten | ab5f5e8 | 2007-09-17 11:51:22 -0700 | [diff] [blame] | 638 | { |
| 639 | struct audit_buffer *audit_buf = NULL; |
Paul Moore | afeb14b | 2007-12-21 14:58:11 -0800 | [diff] [blame] | 640 | |
| 641 | if (audit_enabled == 0) |
| 642 | return NULL; |
| 643 | audit_buf = audit_log_start(current->audit_context, GFP_ATOMIC, |
| 644 | AUDIT_MAC_IPSEC_EVENT); |
| 645 | if (audit_buf == NULL) |
| 646 | return NULL; |
| 647 | audit_log_format(audit_buf, "op=%s", op); |
| 648 | return audit_buf; |
| 649 | } |
| 650 | |
Eric Paris | 2532386 | 2008-04-18 10:09:25 -0400 | [diff] [blame] | 651 | static inline void xfrm_audit_helper_usrinfo(uid_t auid, u32 ses, u32 secid, |
Paul Moore | afeb14b | 2007-12-21 14:58:11 -0800 | [diff] [blame] | 652 | struct audit_buffer *audit_buf) |
| 653 | { |
Joy Latten | ab5f5e8 | 2007-09-17 11:51:22 -0700 | [diff] [blame] | 654 | char *secctx; |
| 655 | u32 secctx_len; |
| 656 | |
Eric Paris | 2532386 | 2008-04-18 10:09:25 -0400 | [diff] [blame] | 657 | audit_log_format(audit_buf, " auid=%u ses=%u", auid, ses); |
Paul Moore | 68277ac | 2007-12-20 20:49:33 -0800 | [diff] [blame] | 658 | if (secid != 0 && |
| 659 | security_secid_to_secctx(secid, &secctx, &secctx_len) == 0) { |
Joy Latten | ab5f5e8 | 2007-09-17 11:51:22 -0700 | [diff] [blame] | 660 | audit_log_format(audit_buf, " subj=%s", secctx); |
| 661 | security_release_secctx(secctx, secctx_len); |
| 662 | } else |
| 663 | audit_log_task_context(audit_buf); |
Joy Latten | ab5f5e8 | 2007-09-17 11:51:22 -0700 | [diff] [blame] | 664 | } |
| 665 | |
| 666 | extern void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, |
Eric Paris | 2532386 | 2008-04-18 10:09:25 -0400 | [diff] [blame] | 667 | u32 auid, u32 ses, u32 secid); |
Joy Latten | ab5f5e8 | 2007-09-17 11:51:22 -0700 | [diff] [blame] | 668 | extern void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, |
Eric Paris | 2532386 | 2008-04-18 10:09:25 -0400 | [diff] [blame] | 669 | u32 auid, u32 ses, u32 secid); |
Joy Latten | ab5f5e8 | 2007-09-17 11:51:22 -0700 | [diff] [blame] | 670 | extern void xfrm_audit_state_add(struct xfrm_state *x, int result, |
Eric Paris | 2532386 | 2008-04-18 10:09:25 -0400 | [diff] [blame] | 671 | u32 auid, u32 ses, u32 secid); |
Joy Latten | ab5f5e8 | 2007-09-17 11:51:22 -0700 | [diff] [blame] | 672 | extern void xfrm_audit_state_delete(struct xfrm_state *x, int result, |
Eric Paris | 2532386 | 2008-04-18 10:09:25 -0400 | [diff] [blame] | 673 | u32 auid, u32 ses, u32 secid); |
Paul Moore | afeb14b | 2007-12-21 14:58:11 -0800 | [diff] [blame] | 674 | extern void xfrm_audit_state_replay_overflow(struct xfrm_state *x, |
| 675 | struct sk_buff *skb); |
| 676 | extern void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family); |
| 677 | extern void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, |
| 678 | __be32 net_spi, __be32 net_seq); |
| 679 | extern void xfrm_audit_state_icvfail(struct xfrm_state *x, |
| 680 | struct sk_buff *skb, u8 proto); |
Joy Latten | c9204d9 | 2006-11-30 15:50:43 -0600 | [diff] [blame] | 681 | #else |
Marcin Slusarz | 41fef0e | 2008-05-03 21:03:01 -0700 | [diff] [blame] | 682 | |
| 683 | static inline void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, |
| 684 | u32 auid, u32 ses, u32 secid) |
| 685 | { |
| 686 | } |
| 687 | |
| 688 | static inline void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, |
| 689 | u32 auid, u32 ses, u32 secid) |
| 690 | { |
| 691 | } |
| 692 | |
| 693 | static inline void xfrm_audit_state_add(struct xfrm_state *x, int result, |
| 694 | u32 auid, u32 ses, u32 secid) |
| 695 | { |
| 696 | } |
| 697 | |
| 698 | static inline void xfrm_audit_state_delete(struct xfrm_state *x, int result, |
| 699 | u32 auid, u32 ses, u32 secid) |
| 700 | { |
| 701 | } |
| 702 | |
| 703 | static inline void xfrm_audit_state_replay_overflow(struct xfrm_state *x, |
| 704 | struct sk_buff *skb) |
| 705 | { |
| 706 | } |
| 707 | |
| 708 | static inline void xfrm_audit_state_notfound_simple(struct sk_buff *skb, |
| 709 | u16 family) |
| 710 | { |
| 711 | } |
| 712 | |
| 713 | static inline void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, |
| 714 | __be32 net_spi, __be32 net_seq) |
| 715 | { |
| 716 | } |
| 717 | |
| 718 | static inline void xfrm_audit_state_icvfail(struct xfrm_state *x, |
| 719 | struct sk_buff *skb, u8 proto) |
| 720 | { |
| 721 | } |
Joy Latten | c9204d9 | 2006-11-30 15:50:43 -0600 | [diff] [blame] | 722 | #endif /* CONFIG_AUDITSYSCALL */ |
Joy Latten | 161a09e | 2006-11-27 13:11:54 -0600 | [diff] [blame] | 723 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 724 | static inline void xfrm_pol_hold(struct xfrm_policy *policy) |
| 725 | { |
| 726 | if (likely(policy != NULL)) |
| 727 | atomic_inc(&policy->refcnt); |
| 728 | } |
| 729 | |
WANG Cong | 64c31b3 | 2008-01-07 22:34:29 -0800 | [diff] [blame] | 730 | extern void xfrm_policy_destroy(struct xfrm_policy *policy); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 731 | |
| 732 | static inline void xfrm_pol_put(struct xfrm_policy *policy) |
| 733 | { |
| 734 | if (atomic_dec_and_test(&policy->refcnt)) |
WANG Cong | 64c31b3 | 2008-01-07 22:34:29 -0800 | [diff] [blame] | 735 | xfrm_policy_destroy(policy); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 736 | } |
| 737 | |
Masahide NAKAMURA | 4e81bb8 | 2006-08-23 22:43:30 -0700 | [diff] [blame] | 738 | #ifdef CONFIG_XFRM_SUB_POLICY |
| 739 | static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols) |
| 740 | { |
| 741 | int i; |
| 742 | for (i = npols - 1; i >= 0; --i) |
| 743 | xfrm_pol_put(pols[i]); |
| 744 | } |
| 745 | #else |
| 746 | static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols) |
| 747 | { |
| 748 | xfrm_pol_put(pols[0]); |
| 749 | } |
| 750 | #endif |
| 751 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 752 | extern void __xfrm_state_destroy(struct xfrm_state *); |
| 753 | |
Herbert Xu | 21380b8 | 2006-02-22 14:47:13 -0800 | [diff] [blame] | 754 | static inline void __xfrm_state_put(struct xfrm_state *x) |
| 755 | { |
| 756 | atomic_dec(&x->refcnt); |
| 757 | } |
| 758 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 759 | static inline void xfrm_state_put(struct xfrm_state *x) |
| 760 | { |
| 761 | if (atomic_dec_and_test(&x->refcnt)) |
| 762 | __xfrm_state_destroy(x); |
| 763 | } |
| 764 | |
| 765 | static inline void xfrm_state_hold(struct xfrm_state *x) |
| 766 | { |
| 767 | atomic_inc(&x->refcnt); |
| 768 | } |
| 769 | |
| 770 | static __inline__ int addr_match(void *token1, void *token2, int prefixlen) |
| 771 | { |
Al Viro | 5f19343 | 2006-09-27 18:46:32 -0700 | [diff] [blame] | 772 | __be32 *a1 = token1; |
| 773 | __be32 *a2 = token2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 774 | int pdw; |
| 775 | int pbi; |
| 776 | |
jamal | a633746 | 2010-02-09 13:21:17 +0000 | [diff] [blame] | 777 | pdw = prefixlen >> 5; /* num of whole u32 in prefix */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 778 | pbi = prefixlen & 0x1f; /* num of bits in incomplete u32 in prefix */ |
| 779 | |
| 780 | if (pdw) |
| 781 | if (memcmp(a1, a2, pdw << 2)) |
| 782 | return 0; |
| 783 | |
| 784 | if (pbi) { |
Al Viro | 5f19343 | 2006-09-27 18:46:32 -0700 | [diff] [blame] | 785 | __be32 mask; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 786 | |
| 787 | mask = htonl((0xffffffff) << (32 - pbi)); |
| 788 | |
| 789 | if ((a1[pdw] ^ a2[pdw]) & mask) |
| 790 | return 0; |
| 791 | } |
| 792 | |
| 793 | return 1; |
| 794 | } |
| 795 | |
| 796 | static __inline__ |
Al Viro | f9d07e41f8 | 2006-09-27 18:45:50 -0700 | [diff] [blame] | 797 | __be16 xfrm_flowi_sport(struct flowi *fl) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 798 | { |
Al Viro | f9d07e41f8 | 2006-09-27 18:45:50 -0700 | [diff] [blame] | 799 | __be16 port; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 800 | switch(fl->proto) { |
| 801 | case IPPROTO_TCP: |
| 802 | case IPPROTO_UDP: |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 803 | case IPPROTO_UDPLITE: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 804 | case IPPROTO_SCTP: |
| 805 | port = fl->fl_ip_sport; |
| 806 | break; |
| 807 | case IPPROTO_ICMP: |
| 808 | case IPPROTO_ICMPV6: |
| 809 | port = htons(fl->fl_icmp_type); |
| 810 | break; |
Masahide NAKAMURA | 2ce4272 | 2006-08-23 20:39:03 -0700 | [diff] [blame] | 811 | case IPPROTO_MH: |
| 812 | port = htons(fl->fl_mh_type); |
| 813 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 814 | default: |
| 815 | port = 0; /*XXX*/ |
| 816 | } |
| 817 | return port; |
| 818 | } |
| 819 | |
| 820 | static __inline__ |
Al Viro | f9d07e41f8 | 2006-09-27 18:45:50 -0700 | [diff] [blame] | 821 | __be16 xfrm_flowi_dport(struct flowi *fl) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 822 | { |
Al Viro | f9d07e41f8 | 2006-09-27 18:45:50 -0700 | [diff] [blame] | 823 | __be16 port; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 824 | switch(fl->proto) { |
| 825 | case IPPROTO_TCP: |
| 826 | case IPPROTO_UDP: |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 827 | case IPPROTO_UDPLITE: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 828 | case IPPROTO_SCTP: |
| 829 | port = fl->fl_ip_dport; |
| 830 | break; |
| 831 | case IPPROTO_ICMP: |
| 832 | case IPPROTO_ICMPV6: |
| 833 | port = htons(fl->fl_icmp_code); |
| 834 | break; |
| 835 | default: |
| 836 | port = 0; /*XXX*/ |
| 837 | } |
| 838 | return port; |
| 839 | } |
| 840 | |
Andrew Morton | 7768102 | 2006-11-08 22:46:26 -0800 | [diff] [blame] | 841 | extern int xfrm_selector_match(struct xfrm_selector *sel, struct flowi *fl, |
| 842 | unsigned short family); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 843 | |
Trent Jaeger | df71837 | 2005-12-13 23:12:27 -0800 | [diff] [blame] | 844 | #ifdef CONFIG_SECURITY_NETWORK_XFRM |
| 845 | /* If neither has a context --> match |
| 846 | * Otherwise, both must have a context and the sids, doi, alg must match |
| 847 | */ |
| 848 | static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) |
| 849 | { |
| 850 | return ((!s1 && !s2) || |
| 851 | (s1 && s2 && |
| 852 | (s1->ctx_sid == s2->ctx_sid) && |
| 853 | (s1->ctx_doi == s2->ctx_doi) && |
| 854 | (s1->ctx_alg == s2->ctx_alg))); |
| 855 | } |
| 856 | #else |
| 857 | static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) |
| 858 | { |
| 859 | return 1; |
| 860 | } |
| 861 | #endif |
| 862 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 863 | /* A struct encoding bundle of transformations to apply to some set of flow. |
| 864 | * |
| 865 | * dst->child points to the next element of bundle. |
| 866 | * dst->xfrm points to an instanse of transformer. |
| 867 | * |
| 868 | * Due to unfortunate limitations of current routing cache, which we |
| 869 | * have no time to fix, it mirrors struct rtable and bound to the same |
| 870 | * routing key, including saddr,daddr. However, we can have many of |
| 871 | * bundles differing by session id. All the bundles grow from a parent |
| 872 | * policy rule. |
| 873 | */ |
Eric Dumazet | fd2c3ef | 2009-11-03 03:26:03 +0000 | [diff] [blame] | 874 | struct xfrm_dst { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 875 | union { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 876 | struct dst_entry dst; |
| 877 | struct rtable rt; |
| 878 | struct rt6_info rt6; |
| 879 | } u; |
| 880 | struct dst_entry *route; |
Masahide NAKAMURA | 157bfc2 | 2007-04-30 00:33:35 -0700 | [diff] [blame] | 881 | #ifdef CONFIG_XFRM_SUB_POLICY |
| 882 | struct flowi *origin; |
| 883 | struct xfrm_selector *partner; |
| 884 | #endif |
David S. Miller | 9d4a706 | 2006-08-24 03:18:09 -0700 | [diff] [blame] | 885 | u32 genid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 886 | u32 route_mtu_cached; |
| 887 | u32 child_mtu_cached; |
Hideaki YOSHIFUJI | 92d63dec | 2005-05-26 12:58:04 -0700 | [diff] [blame] | 888 | u32 route_cookie; |
| 889 | u32 path_cookie; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 890 | }; |
| 891 | |
Alexey Dobriyan | def8b4f | 2008-10-28 13:24:06 -0700 | [diff] [blame] | 892 | #ifdef CONFIG_XFRM |
Herbert Xu | aabc976 | 2005-05-03 16:27:10 -0700 | [diff] [blame] | 893 | static inline void xfrm_dst_destroy(struct xfrm_dst *xdst) |
| 894 | { |
| 895 | dst_release(xdst->route); |
| 896 | if (likely(xdst->u.dst.xfrm)) |
| 897 | xfrm_state_put(xdst->u.dst.xfrm); |
Masahide NAKAMURA | 157bfc2 | 2007-04-30 00:33:35 -0700 | [diff] [blame] | 898 | #ifdef CONFIG_XFRM_SUB_POLICY |
| 899 | kfree(xdst->origin); |
| 900 | xdst->origin = NULL; |
| 901 | kfree(xdst->partner); |
| 902 | xdst->partner = NULL; |
| 903 | #endif |
Herbert Xu | aabc976 | 2005-05-03 16:27:10 -0700 | [diff] [blame] | 904 | } |
Alexey Dobriyan | def8b4f | 2008-10-28 13:24:06 -0700 | [diff] [blame] | 905 | #endif |
Herbert Xu | aabc976 | 2005-05-03 16:27:10 -0700 | [diff] [blame] | 906 | |
| 907 | extern void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev); |
| 908 | |
Eric Dumazet | fd2c3ef | 2009-11-03 03:26:03 +0000 | [diff] [blame] | 909 | struct sec_path { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 910 | atomic_t refcnt; |
| 911 | int len; |
Herbert Xu | dbe5b4a | 2006-04-01 00:54:16 -0800 | [diff] [blame] | 912 | struct xfrm_state *xvec[XFRM_MAX_DEPTH]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 913 | }; |
| 914 | |
| 915 | static inline struct sec_path * |
| 916 | secpath_get(struct sec_path *sp) |
| 917 | { |
| 918 | if (sp) |
| 919 | atomic_inc(&sp->refcnt); |
| 920 | return sp; |
| 921 | } |
| 922 | |
| 923 | extern void __secpath_destroy(struct sec_path *sp); |
| 924 | |
| 925 | static inline void |
| 926 | secpath_put(struct sec_path *sp) |
| 927 | { |
| 928 | if (sp && atomic_dec_and_test(&sp->refcnt)) |
| 929 | __secpath_destroy(sp); |
| 930 | } |
| 931 | |
| 932 | extern struct sec_path *secpath_dup(struct sec_path *src); |
| 933 | |
| 934 | static inline void |
| 935 | secpath_reset(struct sk_buff *skb) |
| 936 | { |
| 937 | #ifdef CONFIG_XFRM |
| 938 | secpath_put(skb->sp); |
| 939 | skb->sp = NULL; |
| 940 | #endif |
| 941 | } |
| 942 | |
| 943 | static inline int |
Patrick McHardy | a1e59ab | 2006-09-19 12:57:34 -0700 | [diff] [blame] | 944 | xfrm_addr_any(xfrm_address_t *addr, unsigned short family) |
| 945 | { |
| 946 | switch (family) { |
| 947 | case AF_INET: |
| 948 | return addr->a4 == 0; |
| 949 | case AF_INET6: |
| 950 | return ipv6_addr_any((struct in6_addr *)&addr->a6); |
| 951 | } |
| 952 | return 0; |
| 953 | } |
| 954 | |
| 955 | static inline int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 956 | __xfrm4_state_addr_cmp(struct xfrm_tmpl *tmpl, struct xfrm_state *x) |
| 957 | { |
| 958 | return (tmpl->saddr.a4 && |
| 959 | tmpl->saddr.a4 != x->props.saddr.a4); |
| 960 | } |
| 961 | |
| 962 | static inline int |
| 963 | __xfrm6_state_addr_cmp(struct xfrm_tmpl *tmpl, struct xfrm_state *x) |
| 964 | { |
| 965 | return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) && |
| 966 | ipv6_addr_cmp((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr)); |
| 967 | } |
| 968 | |
| 969 | static inline int |
| 970 | xfrm_state_addr_cmp(struct xfrm_tmpl *tmpl, struct xfrm_state *x, unsigned short family) |
| 971 | { |
| 972 | switch (family) { |
| 973 | case AF_INET: |
| 974 | return __xfrm4_state_addr_cmp(tmpl, x); |
| 975 | case AF_INET6: |
| 976 | return __xfrm6_state_addr_cmp(tmpl, x); |
| 977 | } |
| 978 | return !0; |
| 979 | } |
| 980 | |
| 981 | #ifdef CONFIG_XFRM |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 982 | extern int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb, unsigned short family); |
| 983 | |
Herbert Xu | d5422ef | 2007-12-12 10:44:16 -0800 | [diff] [blame] | 984 | static inline int __xfrm_policy_check2(struct sock *sk, int dir, |
| 985 | struct sk_buff *skb, |
| 986 | unsigned int family, int reverse) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 987 | { |
Alexey Dobriyan | f6e1e25 | 2008-11-25 17:35:44 -0800 | [diff] [blame] | 988 | struct net *net = dev_net(skb->dev); |
Herbert Xu | d5422ef | 2007-12-12 10:44:16 -0800 | [diff] [blame] | 989 | int ndir = dir | (reverse ? XFRM_POLICY_MASK + 1 : 0); |
| 990 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 991 | if (sk && sk->sk_policy[XFRM_POLICY_IN]) |
Herbert Xu | d5422ef | 2007-12-12 10:44:16 -0800 | [diff] [blame] | 992 | return __xfrm_policy_check(sk, ndir, skb, family); |
Masahide NAKAMURA | 4e81bb8 | 2006-08-23 22:43:30 -0700 | [diff] [blame] | 993 | |
Alexey Dobriyan | f6e1e25 | 2008-11-25 17:35:44 -0800 | [diff] [blame] | 994 | return (!net->xfrm.policy_count[dir] && !skb->sp) || |
Eric Dumazet | adf3090 | 2009-06-02 05:19:30 +0000 | [diff] [blame] | 995 | (skb_dst(skb)->flags & DST_NOPOLICY) || |
Herbert Xu | d5422ef | 2007-12-12 10:44:16 -0800 | [diff] [blame] | 996 | __xfrm_policy_check(sk, ndir, skb, family); |
| 997 | } |
| 998 | |
| 999 | static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) |
| 1000 | { |
| 1001 | return __xfrm_policy_check2(sk, dir, skb, family, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1002 | } |
| 1003 | |
| 1004 | static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) |
| 1005 | { |
| 1006 | return xfrm_policy_check(sk, dir, skb, AF_INET); |
| 1007 | } |
| 1008 | |
| 1009 | static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) |
| 1010 | { |
| 1011 | return xfrm_policy_check(sk, dir, skb, AF_INET6); |
| 1012 | } |
| 1013 | |
Herbert Xu | d5422ef | 2007-12-12 10:44:16 -0800 | [diff] [blame] | 1014 | static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir, |
| 1015 | struct sk_buff *skb) |
| 1016 | { |
| 1017 | return __xfrm_policy_check2(sk, dir, skb, AF_INET, 1); |
| 1018 | } |
| 1019 | |
| 1020 | static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir, |
| 1021 | struct sk_buff *skb) |
| 1022 | { |
| 1023 | return __xfrm_policy_check2(sk, dir, skb, AF_INET6, 1); |
| 1024 | } |
| 1025 | |
| 1026 | extern int __xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, |
| 1027 | unsigned int family, int reverse); |
| 1028 | |
| 1029 | static inline int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, |
| 1030 | unsigned int family) |
| 1031 | { |
| 1032 | return __xfrm_decode_session(skb, fl, family, 0); |
| 1033 | } |
| 1034 | |
| 1035 | static inline int xfrm_decode_session_reverse(struct sk_buff *skb, |
| 1036 | struct flowi *fl, |
| 1037 | unsigned int family) |
| 1038 | { |
| 1039 | return __xfrm_decode_session(skb, fl, family, 1); |
| 1040 | } |
| 1041 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1042 | extern int __xfrm_route_forward(struct sk_buff *skb, unsigned short family); |
| 1043 | |
| 1044 | static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family) |
| 1045 | { |
Alexey Dobriyan | 99a6665 | 2008-11-25 17:36:13 -0800 | [diff] [blame] | 1046 | struct net *net = dev_net(skb->dev); |
| 1047 | |
| 1048 | return !net->xfrm.policy_count[XFRM_POLICY_OUT] || |
Eric Dumazet | adf3090 | 2009-06-02 05:19:30 +0000 | [diff] [blame] | 1049 | (skb_dst(skb)->flags & DST_NOXFRM) || |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1050 | __xfrm_route_forward(skb, family); |
| 1051 | } |
| 1052 | |
| 1053 | static inline int xfrm4_route_forward(struct sk_buff *skb) |
| 1054 | { |
| 1055 | return xfrm_route_forward(skb, AF_INET); |
| 1056 | } |
| 1057 | |
| 1058 | static inline int xfrm6_route_forward(struct sk_buff *skb) |
| 1059 | { |
| 1060 | return xfrm_route_forward(skb, AF_INET6); |
| 1061 | } |
| 1062 | |
| 1063 | extern int __xfrm_sk_clone_policy(struct sock *sk); |
| 1064 | |
| 1065 | static inline int xfrm_sk_clone_policy(struct sock *sk) |
| 1066 | { |
| 1067 | if (unlikely(sk->sk_policy[0] || sk->sk_policy[1])) |
| 1068 | return __xfrm_sk_clone_policy(sk); |
| 1069 | return 0; |
| 1070 | } |
| 1071 | |
Herbert Xu | 4666faa | 2005-06-18 22:43:22 -0700 | [diff] [blame] | 1072 | extern int xfrm_policy_delete(struct xfrm_policy *pol, int dir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1073 | |
| 1074 | static inline void xfrm_sk_free_policy(struct sock *sk) |
| 1075 | { |
| 1076 | if (unlikely(sk->sk_policy[0] != NULL)) { |
| 1077 | xfrm_policy_delete(sk->sk_policy[0], XFRM_POLICY_MAX); |
| 1078 | sk->sk_policy[0] = NULL; |
| 1079 | } |
| 1080 | if (unlikely(sk->sk_policy[1] != NULL)) { |
| 1081 | xfrm_policy_delete(sk->sk_policy[1], XFRM_POLICY_MAX+1); |
| 1082 | sk->sk_policy[1] = NULL; |
| 1083 | } |
| 1084 | } |
| 1085 | |
| 1086 | #else |
| 1087 | |
| 1088 | static inline void xfrm_sk_free_policy(struct sock *sk) {} |
| 1089 | static inline int xfrm_sk_clone_policy(struct sock *sk) { return 0; } |
| 1090 | static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; } |
| 1091 | static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; } |
| 1092 | static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) |
| 1093 | { |
| 1094 | return 1; |
| 1095 | } |
| 1096 | static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) |
| 1097 | { |
| 1098 | return 1; |
| 1099 | } |
| 1100 | static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) |
| 1101 | { |
| 1102 | return 1; |
| 1103 | } |
Herbert Xu | d5422ef | 2007-12-12 10:44:16 -0800 | [diff] [blame] | 1104 | static inline int xfrm_decode_session_reverse(struct sk_buff *skb, |
| 1105 | struct flowi *fl, |
| 1106 | unsigned int family) |
| 1107 | { |
| 1108 | return -ENOSYS; |
| 1109 | } |
| 1110 | static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir, |
| 1111 | struct sk_buff *skb) |
| 1112 | { |
| 1113 | return 1; |
| 1114 | } |
| 1115 | static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir, |
| 1116 | struct sk_buff *skb) |
| 1117 | { |
| 1118 | return 1; |
| 1119 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1120 | #endif |
| 1121 | |
| 1122 | static __inline__ |
| 1123 | xfrm_address_t *xfrm_flowi_daddr(struct flowi *fl, unsigned short family) |
| 1124 | { |
| 1125 | switch (family){ |
| 1126 | case AF_INET: |
| 1127 | return (xfrm_address_t *)&fl->fl4_dst; |
| 1128 | case AF_INET6: |
| 1129 | return (xfrm_address_t *)&fl->fl6_dst; |
| 1130 | } |
| 1131 | return NULL; |
| 1132 | } |
| 1133 | |
| 1134 | static __inline__ |
| 1135 | xfrm_address_t *xfrm_flowi_saddr(struct flowi *fl, unsigned short family) |
| 1136 | { |
| 1137 | switch (family){ |
| 1138 | case AF_INET: |
| 1139 | return (xfrm_address_t *)&fl->fl4_src; |
| 1140 | case AF_INET6: |
| 1141 | return (xfrm_address_t *)&fl->fl6_src; |
| 1142 | } |
| 1143 | return NULL; |
| 1144 | } |
| 1145 | |
YOSHIFUJI Hideaki | 9bb182a | 2008-02-22 14:48:22 +0900 | [diff] [blame] | 1146 | static __inline__ |
| 1147 | void xfrm_flowi_addr_get(struct flowi *fl, |
| 1148 | xfrm_address_t *saddr, xfrm_address_t *daddr, |
| 1149 | unsigned short family) |
| 1150 | { |
| 1151 | switch(family) { |
| 1152 | case AF_INET: |
| 1153 | memcpy(&saddr->a4, &fl->fl4_src, sizeof(saddr->a4)); |
| 1154 | memcpy(&daddr->a4, &fl->fl4_dst, sizeof(daddr->a4)); |
| 1155 | break; |
| 1156 | case AF_INET6: |
| 1157 | ipv6_addr_copy((struct in6_addr *)&saddr->a6, &fl->fl6_src); |
| 1158 | ipv6_addr_copy((struct in6_addr *)&daddr->a6, &fl->fl6_dst); |
| 1159 | break; |
| 1160 | } |
| 1161 | } |
| 1162 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1163 | static __inline__ int |
| 1164 | __xfrm4_state_addr_check(struct xfrm_state *x, |
| 1165 | xfrm_address_t *daddr, xfrm_address_t *saddr) |
| 1166 | { |
| 1167 | if (daddr->a4 == x->id.daddr.a4 && |
| 1168 | (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4)) |
| 1169 | return 1; |
| 1170 | return 0; |
| 1171 | } |
| 1172 | |
| 1173 | static __inline__ int |
| 1174 | __xfrm6_state_addr_check(struct xfrm_state *x, |
| 1175 | xfrm_address_t *daddr, xfrm_address_t *saddr) |
| 1176 | { |
| 1177 | if (!ipv6_addr_cmp((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) && |
| 1178 | (!ipv6_addr_cmp((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr)|| |
| 1179 | ipv6_addr_any((struct in6_addr *)saddr) || |
| 1180 | ipv6_addr_any((struct in6_addr *)&x->props.saddr))) |
| 1181 | return 1; |
| 1182 | return 0; |
| 1183 | } |
| 1184 | |
| 1185 | static __inline__ int |
| 1186 | xfrm_state_addr_check(struct xfrm_state *x, |
| 1187 | xfrm_address_t *daddr, xfrm_address_t *saddr, |
| 1188 | unsigned short family) |
| 1189 | { |
| 1190 | switch (family) { |
| 1191 | case AF_INET: |
| 1192 | return __xfrm4_state_addr_check(x, daddr, saddr); |
| 1193 | case AF_INET6: |
| 1194 | return __xfrm6_state_addr_check(x, daddr, saddr); |
| 1195 | } |
| 1196 | return 0; |
| 1197 | } |
| 1198 | |
Masahide NAKAMURA | e53820d | 2006-08-23 19:12:01 -0700 | [diff] [blame] | 1199 | static __inline__ int |
| 1200 | xfrm_state_addr_flow_check(struct xfrm_state *x, struct flowi *fl, |
| 1201 | unsigned short family) |
| 1202 | { |
| 1203 | switch (family) { |
| 1204 | case AF_INET: |
| 1205 | return __xfrm4_state_addr_check(x, |
| 1206 | (xfrm_address_t *)&fl->fl4_dst, |
| 1207 | (xfrm_address_t *)&fl->fl4_src); |
| 1208 | case AF_INET6: |
| 1209 | return __xfrm6_state_addr_check(x, |
| 1210 | (xfrm_address_t *)&fl->fl6_dst, |
| 1211 | (xfrm_address_t *)&fl->fl6_src); |
| 1212 | } |
| 1213 | return 0; |
| 1214 | } |
| 1215 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1216 | static inline int xfrm_state_kern(struct xfrm_state *x) |
| 1217 | { |
| 1218 | return atomic_read(&x->tunnel_users); |
| 1219 | } |
| 1220 | |
Masahide NAKAMURA | 5794708 | 2006-09-22 15:06:24 -0700 | [diff] [blame] | 1221 | static inline int xfrm_id_proto_match(u8 proto, u8 userproto) |
| 1222 | { |
Masahide NAKAMURA | dc00a52 | 2006-08-23 17:49:52 -0700 | [diff] [blame] | 1223 | return (!userproto || proto == userproto || |
| 1224 | (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH || |
| 1225 | proto == IPPROTO_ESP || |
| 1226 | proto == IPPROTO_COMP))); |
Masahide NAKAMURA | 5794708 | 2006-09-22 15:06:24 -0700 | [diff] [blame] | 1227 | } |
| 1228 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1229 | /* |
| 1230 | * xfrm algorithm information |
| 1231 | */ |
Herbert Xu | 1a6509d | 2008-01-28 19:37:29 -0800 | [diff] [blame] | 1232 | struct xfrm_algo_aead_info { |
| 1233 | u16 icv_truncbits; |
| 1234 | }; |
| 1235 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1236 | struct xfrm_algo_auth_info { |
| 1237 | u16 icv_truncbits; |
| 1238 | u16 icv_fullbits; |
| 1239 | }; |
| 1240 | |
| 1241 | struct xfrm_algo_encr_info { |
| 1242 | u16 blockbits; |
| 1243 | u16 defkeybits; |
| 1244 | }; |
| 1245 | |
| 1246 | struct xfrm_algo_comp_info { |
| 1247 | u16 threshold; |
| 1248 | }; |
| 1249 | |
| 1250 | struct xfrm_algo_desc { |
| 1251 | char *name; |
Herbert Xu | 04ff126 | 2006-08-13 08:50:00 +1000 | [diff] [blame] | 1252 | char *compat; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1253 | u8 available:1; |
| 1254 | union { |
Herbert Xu | 1a6509d | 2008-01-28 19:37:29 -0800 | [diff] [blame] | 1255 | struct xfrm_algo_aead_info aead; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1256 | struct xfrm_algo_auth_info auth; |
| 1257 | struct xfrm_algo_encr_info encr; |
| 1258 | struct xfrm_algo_comp_info comp; |
| 1259 | } uinfo; |
| 1260 | struct sadb_alg desc; |
| 1261 | }; |
| 1262 | |
| 1263 | /* XFRM tunnel handlers. */ |
| 1264 | struct xfrm_tunnel { |
| 1265 | int (*handler)(struct sk_buff *skb); |
jamal | a633746 | 2010-02-09 13:21:17 +0000 | [diff] [blame] | 1266 | int (*err_handler)(struct sk_buff *skb, u32 info); |
Herbert Xu | d2acc34 | 2006-03-28 01:12:13 -0800 | [diff] [blame] | 1267 | |
| 1268 | struct xfrm_tunnel *next; |
| 1269 | int priority; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1270 | }; |
| 1271 | |
| 1272 | struct xfrm6_tunnel { |
Herbert Xu | d2acc34 | 2006-03-28 01:12:13 -0800 | [diff] [blame] | 1273 | int (*handler)(struct sk_buff *skb); |
| 1274 | int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt, |
Brian Haley | d5fdd6b | 2009-06-23 04:31:07 -0700 | [diff] [blame] | 1275 | u8 type, u8 code, int offset, __be32 info); |
Herbert Xu | d2acc34 | 2006-03-28 01:12:13 -0800 | [diff] [blame] | 1276 | struct xfrm6_tunnel *next; |
| 1277 | int priority; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1278 | }; |
| 1279 | |
| 1280 | extern void xfrm_init(void); |
Neil Horman | a33bc5c | 2009-07-30 18:52:15 -0700 | [diff] [blame] | 1281 | extern void xfrm4_init(int rt_hash_size); |
Alexey Dobriyan | d62ddc2 | 2008-11-25 17:14:31 -0800 | [diff] [blame] | 1282 | extern int xfrm_state_init(struct net *net); |
| 1283 | extern void xfrm_state_fini(struct net *net); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1284 | extern void xfrm4_state_init(void); |
Daniel Lezcano | c35b7e7 | 2007-12-08 00:14:11 -0800 | [diff] [blame] | 1285 | #ifdef CONFIG_XFRM |
| 1286 | extern int xfrm6_init(void); |
| 1287 | extern void xfrm6_fini(void); |
Daniel Lezcano | 0013cab | 2007-12-07 00:42:11 -0800 | [diff] [blame] | 1288 | extern int xfrm6_state_init(void); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1289 | extern void xfrm6_state_fini(void); |
Daniel Lezcano | c35b7e7 | 2007-12-08 00:14:11 -0800 | [diff] [blame] | 1290 | #else |
| 1291 | static inline int xfrm6_init(void) |
| 1292 | { |
| 1293 | return 0; |
| 1294 | } |
| 1295 | static inline void xfrm6_fini(void) |
| 1296 | { |
| 1297 | ; |
| 1298 | } |
| 1299 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1300 | |
Masahide NAKAMURA | 558f82e | 2007-12-20 20:42:57 -0800 | [diff] [blame] | 1301 | #ifdef CONFIG_XFRM_STATISTICS |
Alexey Dobriyan | c68cd1a | 2008-11-25 18:00:14 -0800 | [diff] [blame] | 1302 | extern int xfrm_proc_init(struct net *net); |
| 1303 | extern void xfrm_proc_fini(struct net *net); |
Masahide NAKAMURA | 558f82e | 2007-12-20 20:42:57 -0800 | [diff] [blame] | 1304 | #endif |
| 1305 | |
Alexey Dobriyan | b27aead | 2008-11-25 18:00:48 -0800 | [diff] [blame] | 1306 | extern int xfrm_sysctl_init(struct net *net); |
| 1307 | #ifdef CONFIG_SYSCTL |
| 1308 | extern void xfrm_sysctl_fini(struct net *net); |
| 1309 | #else |
| 1310 | static inline void xfrm_sysctl_fini(struct net *net) |
| 1311 | { |
| 1312 | } |
| 1313 | #endif |
| 1314 | |
Herbert Xu | 5c18245 | 2008-09-22 19:48:19 -0700 | [diff] [blame] | 1315 | extern void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto); |
Alexey Dobriyan | 284fa7d | 2008-11-25 17:32:14 -0800 | [diff] [blame] | 1316 | extern int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk, |
Timo Teras | 4c563f7 | 2008-02-28 21:31:08 -0800 | [diff] [blame] | 1317 | int (*func)(struct xfrm_state *, int, void*), void *); |
Herbert Xu | abb81c4 | 2008-09-09 19:58:29 -0700 | [diff] [blame] | 1318 | extern void xfrm_state_walk_done(struct xfrm_state_walk *walk); |
Alexey Dobriyan | 673c09b | 2008-11-25 17:15:16 -0800 | [diff] [blame] | 1319 | extern struct xfrm_state *xfrm_state_alloc(struct net *net); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1320 | extern struct xfrm_state *xfrm_state_find(xfrm_address_t *daddr, xfrm_address_t *saddr, |
| 1321 | struct flowi *fl, struct xfrm_tmpl *tmpl, |
| 1322 | struct xfrm_policy *pol, int *err, |
| 1323 | unsigned short family); |
Jamal Hadi Salim | bd55775 | 2010-02-22 16:20:22 -0800 | [diff] [blame] | 1324 | extern struct xfrm_state *xfrm_stateonly_find(struct net *net, u32 mark, |
Alexey Dobriyan | 5447c5e | 2008-11-25 17:31:51 -0800 | [diff] [blame] | 1325 | xfrm_address_t *daddr, |
Jamal Hadi Salim | 628529b | 2007-07-02 22:41:14 -0700 | [diff] [blame] | 1326 | xfrm_address_t *saddr, |
| 1327 | unsigned short family, |
| 1328 | u8 mode, u8 proto, u32 reqid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1329 | extern int xfrm_state_check_expire(struct xfrm_state *x); |
| 1330 | extern void xfrm_state_insert(struct xfrm_state *x); |
| 1331 | extern int xfrm_state_add(struct xfrm_state *x); |
| 1332 | extern int xfrm_state_update(struct xfrm_state *x); |
Jamal Hadi Salim | bd55775 | 2010-02-22 16:20:22 -0800 | [diff] [blame] | 1333 | extern struct xfrm_state *xfrm_state_lookup(struct net *net, u32 mark, |
| 1334 | xfrm_address_t *daddr, __be32 spi, |
| 1335 | u8 proto, unsigned short family); |
| 1336 | extern struct xfrm_state *xfrm_state_lookup_byaddr(struct net *net, u32 mark, |
| 1337 | xfrm_address_t *daddr, |
| 1338 | xfrm_address_t *saddr, |
| 1339 | u8 proto, |
| 1340 | unsigned short family); |
Masahide NAKAMURA | 41a49cc | 2006-08-23 22:48:31 -0700 | [diff] [blame] | 1341 | #ifdef CONFIG_XFRM_SUB_POLICY |
| 1342 | extern int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, |
| 1343 | int n, unsigned short family); |
| 1344 | extern int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, |
| 1345 | int n, unsigned short family); |
| 1346 | #else |
| 1347 | static inline int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, |
| 1348 | int n, unsigned short family) |
| 1349 | { |
| 1350 | return -ENOSYS; |
| 1351 | } |
| 1352 | |
| 1353 | static inline int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, |
| 1354 | int n, unsigned short family) |
| 1355 | { |
| 1356 | return -ENOSYS; |
| 1357 | } |
| 1358 | #endif |
Jamal Hadi Salim | af11e31 | 2007-05-04 12:55:13 -0700 | [diff] [blame] | 1359 | |
| 1360 | struct xfrmk_sadinfo { |
| 1361 | u32 sadhcnt; /* current hash bkts */ |
| 1362 | u32 sadhmcnt; /* max allowed hash bkts */ |
| 1363 | u32 sadcnt; /* current running count */ |
| 1364 | }; |
| 1365 | |
Jamal Hadi Salim | 5a6d341 | 2007-05-04 12:55:39 -0700 | [diff] [blame] | 1366 | struct xfrmk_spdinfo { |
| 1367 | u32 incnt; |
| 1368 | u32 outcnt; |
| 1369 | u32 fwdcnt; |
| 1370 | u32 inscnt; |
| 1371 | u32 outscnt; |
| 1372 | u32 fwdscnt; |
| 1373 | u32 spdhcnt; |
| 1374 | u32 spdhmcnt; |
| 1375 | }; |
| 1376 | |
Jamal Hadi Salim | bd55775 | 2010-02-22 16:20:22 -0800 | [diff] [blame] | 1377 | extern struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, |
| 1378 | u32 seq); |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 1379 | extern int xfrm_state_delete(struct xfrm_state *x); |
Alexey Dobriyan | 0e60245 | 2008-11-25 17:30:18 -0800 | [diff] [blame] | 1380 | extern int xfrm_state_flush(struct net *net, u8 proto, struct xfrm_audit *audit_info); |
Alexey Dobriyan | e071041 | 2010-01-23 13:37:10 +0000 | [diff] [blame] | 1381 | extern void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si); |
| 1382 | extern void xfrm_spd_getinfo(struct net *net, struct xfrmk_spdinfo *si); |
Paul Moore | afeb14b | 2007-12-21 14:58:11 -0800 | [diff] [blame] | 1383 | extern int xfrm_replay_check(struct xfrm_state *x, |
| 1384 | struct sk_buff *skb, __be32 seq); |
Al Viro | 61f4627 | 2006-09-27 18:48:33 -0700 | [diff] [blame] | 1385 | extern void xfrm_replay_advance(struct xfrm_state *x, __be32 seq); |
Jamal Hadi Salim | f8cd548 | 2006-03-20 19:15:11 -0800 | [diff] [blame] | 1386 | extern void xfrm_replay_notify(struct xfrm_state *x, int event); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1387 | extern int xfrm_state_mtu(struct xfrm_state *x, int mtu); |
Herbert Xu | 72cb696 | 2005-06-20 13:18:08 -0700 | [diff] [blame] | 1388 | extern int xfrm_init_state(struct xfrm_state *x); |
Herbert Xu | 227620e | 2007-11-13 21:41:28 -0800 | [diff] [blame] | 1389 | extern int xfrm_prepare_input(struct xfrm_state *x, struct sk_buff *skb); |
Herbert Xu | 716062f | 2007-11-13 21:44:23 -0800 | [diff] [blame] | 1390 | extern int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, |
| 1391 | int encap_type); |
Herbert Xu | 1bf06cd | 2007-11-19 18:50:17 -0800 | [diff] [blame] | 1392 | extern int xfrm_input_resume(struct sk_buff *skb, int nexthdr); |
Herbert Xu | c6581a4 | 2007-11-13 21:43:43 -0800 | [diff] [blame] | 1393 | extern int xfrm_output_resume(struct sk_buff *skb, int err); |
Herbert Xu | 406ef77 | 2007-10-08 17:16:30 -0700 | [diff] [blame] | 1394 | extern int xfrm_output(struct sk_buff *skb); |
Kazunori MIYAZAWA | df9dcb4 | 2008-03-24 14:51:51 -0700 | [diff] [blame] | 1395 | extern int xfrm_inner_extract_output(struct xfrm_state *x, struct sk_buff *skb); |
Herbert Xu | 36cf9ac | 2007-11-13 21:40:52 -0800 | [diff] [blame] | 1396 | extern int xfrm4_extract_header(struct sk_buff *skb); |
Herbert Xu | 227620e | 2007-11-13 21:41:28 -0800 | [diff] [blame] | 1397 | extern int xfrm4_extract_input(struct xfrm_state *x, struct sk_buff *skb); |
Herbert Xu | c4541b4 | 2007-10-17 21:28:53 -0700 | [diff] [blame] | 1398 | extern int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi, |
| 1399 | int encap_type); |
Herbert Xu | 716062f | 2007-11-13 21:44:23 -0800 | [diff] [blame] | 1400 | extern int xfrm4_transport_finish(struct sk_buff *skb, int async); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1401 | extern int xfrm4_rcv(struct sk_buff *skb); |
Herbert Xu | c4541b4 | 2007-10-17 21:28:53 -0700 | [diff] [blame] | 1402 | |
| 1403 | static inline int xfrm4_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi) |
| 1404 | { |
| 1405 | return xfrm4_rcv_encap(skb, nexthdr, spi, 0); |
| 1406 | } |
| 1407 | |
Herbert Xu | 36cf9ac | 2007-11-13 21:40:52 -0800 | [diff] [blame] | 1408 | extern int xfrm4_extract_output(struct xfrm_state *x, struct sk_buff *skb); |
| 1409 | extern int xfrm4_prepare_output(struct xfrm_state *x, struct sk_buff *skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1410 | extern int xfrm4_output(struct sk_buff *skb); |
Kazunori MIYAZAWA | c0d5640 | 2007-02-13 12:54:47 -0800 | [diff] [blame] | 1411 | extern int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family); |
| 1412 | extern int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family); |
Herbert Xu | 36cf9ac | 2007-11-13 21:40:52 -0800 | [diff] [blame] | 1413 | extern int xfrm6_extract_header(struct sk_buff *skb); |
Herbert Xu | 227620e | 2007-11-13 21:41:28 -0800 | [diff] [blame] | 1414 | extern int xfrm6_extract_input(struct xfrm_state *x, struct sk_buff *skb); |
Herbert Xu | 33b5ecb | 2007-10-17 21:29:25 -0700 | [diff] [blame] | 1415 | extern int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi); |
Herbert Xu | 716062f | 2007-11-13 21:44:23 -0800 | [diff] [blame] | 1416 | extern int xfrm6_transport_finish(struct sk_buff *skb, int async); |
Herbert Xu | e5bbef2 | 2007-10-15 12:50:28 -0700 | [diff] [blame] | 1417 | extern int xfrm6_rcv(struct sk_buff *skb); |
Masahide NAKAMURA | fbd9a5b | 2006-08-23 18:08:21 -0700 | [diff] [blame] | 1418 | extern int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr, |
| 1419 | xfrm_address_t *saddr, u8 proto); |
Kazunori MIYAZAWA | 73d605d | 2007-02-13 12:55:55 -0800 | [diff] [blame] | 1420 | extern int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family); |
| 1421 | extern int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family); |
Alexey Dobriyan | a166477 | 2010-01-25 10:37:54 +0000 | [diff] [blame] | 1422 | extern __be32 xfrm6_tunnel_alloc_spi(struct net *net, xfrm_address_t *saddr); |
| 1423 | extern void xfrm6_tunnel_free_spi(struct net *net, xfrm_address_t *saddr); |
| 1424 | extern __be32 xfrm6_tunnel_spi_lookup(struct net *net, xfrm_address_t *saddr); |
Herbert Xu | 36cf9ac | 2007-11-13 21:40:52 -0800 | [diff] [blame] | 1425 | extern int xfrm6_extract_output(struct xfrm_state *x, struct sk_buff *skb); |
| 1426 | extern int xfrm6_prepare_output(struct xfrm_state *x, struct sk_buff *skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1427 | extern int xfrm6_output(struct sk_buff *skb); |
Masahide NAKAMURA | aee5adb | 2006-08-23 17:57:28 -0700 | [diff] [blame] | 1428 | extern int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb, |
| 1429 | u8 **prevhdr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1430 | |
| 1431 | #ifdef CONFIG_XFRM |
James Chapman | 067b207 | 2007-07-05 17:08:05 -0700 | [diff] [blame] | 1432 | extern int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1433 | extern int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1434 | #else |
| 1435 | static inline int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen) |
| 1436 | { |
| 1437 | return -ENOPROTOOPT; |
| 1438 | } |
| 1439 | |
James Chapman | 067b207 | 2007-07-05 17:08:05 -0700 | [diff] [blame] | 1440 | static inline int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1441 | { |
| 1442 | /* should not happen */ |
| 1443 | kfree_skb(skb); |
| 1444 | return 0; |
| 1445 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1446 | #endif |
| 1447 | |
Alexey Dobriyan | 0331b1f | 2008-11-25 17:21:45 -0800 | [diff] [blame] | 1448 | struct xfrm_policy *xfrm_policy_alloc(struct net *net, gfp_t gfp); |
Timo Teras | 4c563f7 | 2008-02-28 21:31:08 -0800 | [diff] [blame] | 1449 | |
Herbert Xu | 12a169e | 2008-10-01 07:03:24 -0700 | [diff] [blame] | 1450 | extern void xfrm_policy_walk_init(struct xfrm_policy_walk *walk, u8 type); |
Alexey Dobriyan | cdcbca7 | 2008-11-25 17:34:49 -0800 | [diff] [blame] | 1451 | extern int xfrm_policy_walk(struct net *net, struct xfrm_policy_walk *walk, |
Timo Teras | 4c563f7 | 2008-02-28 21:31:08 -0800 | [diff] [blame] | 1452 | int (*func)(struct xfrm_policy *, int, int, void*), void *); |
Herbert Xu | 12a169e | 2008-10-01 07:03:24 -0700 | [diff] [blame] | 1453 | extern void xfrm_policy_walk_done(struct xfrm_policy_walk *walk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1454 | int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl); |
Jamal Hadi Salim | 8ca2e93 | 2010-02-22 11:32:57 +0000 | [diff] [blame] | 1455 | struct xfrm_policy *xfrm_policy_bysel_ctx(struct net *net, u32 mark, |
| 1456 | u8 type, int dir, |
Masahide NAKAMURA | 4e81bb8 | 2006-08-23 22:43:30 -0700 | [diff] [blame] | 1457 | struct xfrm_selector *sel, |
Eric Paris | ef41aaa | 2007-03-07 15:37:58 -0800 | [diff] [blame] | 1458 | struct xfrm_sec_ctx *ctx, int delete, |
| 1459 | int *err); |
Jamal Hadi Salim | 8ca2e93 | 2010-02-22 11:32:57 +0000 | [diff] [blame] | 1460 | struct xfrm_policy *xfrm_policy_byid(struct net *net, u32 mark, u8, int dir, u32 id, int delete, int *err); |
Alexey Dobriyan | 33ffbbd | 2008-11-25 17:33:32 -0800 | [diff] [blame] | 1461 | int xfrm_policy_flush(struct net *net, u8 type, struct xfrm_audit *audit_info); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1462 | u32 xfrm_get_acqseq(void); |
Herbert Xu | 658b219 | 2007-10-09 13:29:52 -0700 | [diff] [blame] | 1463 | extern int xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi); |
Jamal Hadi Salim | bd55775 | 2010-02-22 16:20:22 -0800 | [diff] [blame] | 1464 | struct xfrm_state *xfrm_find_acq(struct net *net, struct xfrm_mark *mark, |
| 1465 | u8 mode, u32 reqid, u8 proto, |
| 1466 | xfrm_address_t *daddr, |
| 1467 | xfrm_address_t *saddr, int create, |
| 1468 | unsigned short family); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1469 | extern int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol); |
Venkat Yekkirala | 5b368e6 | 2006-10-05 15:42:18 -0500 | [diff] [blame] | 1470 | extern int xfrm_bundle_ok(struct xfrm_policy *pol, struct xfrm_dst *xdst, |
| 1471 | struct flowi *fl, int family, int strict); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1472 | |
Shinta Sugimoto | 80c9aba | 2007-02-08 13:11:42 -0800 | [diff] [blame] | 1473 | #ifdef CONFIG_XFRM_MIGRATE |
| 1474 | extern int km_migrate(struct xfrm_selector *sel, u8 dir, u8 type, |
Arnaud Ebalard | 13c1d18 | 2008-10-05 13:33:42 -0700 | [diff] [blame] | 1475 | struct xfrm_migrate *m, int num_bundles, |
| 1476 | struct xfrm_kmaddress *k); |
Shinta Sugimoto | 80c9aba | 2007-02-08 13:11:42 -0800 | [diff] [blame] | 1477 | extern struct xfrm_state * xfrm_migrate_state_find(struct xfrm_migrate *m); |
| 1478 | extern struct xfrm_state * xfrm_state_migrate(struct xfrm_state *x, |
| 1479 | struct xfrm_migrate *m); |
| 1480 | extern int xfrm_migrate(struct xfrm_selector *sel, u8 dir, u8 type, |
Arnaud Ebalard | 13c1d18 | 2008-10-05 13:33:42 -0700 | [diff] [blame] | 1481 | struct xfrm_migrate *m, int num_bundles, |
| 1482 | struct xfrm_kmaddress *k); |
Shinta Sugimoto | 80c9aba | 2007-02-08 13:11:42 -0800 | [diff] [blame] | 1483 | #endif |
| 1484 | |
Al Viro | 5d36b18 | 2006-11-08 00:24:06 -0800 | [diff] [blame] | 1485 | extern int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); |
Jamal Hadi Salim | 6c5c8ca | 2006-03-20 19:17:25 -0800 | [diff] [blame] | 1486 | extern void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 pid); |
Alexey Dobriyan | db983c1 | 2008-11-25 17:51:01 -0800 | [diff] [blame] | 1487 | extern int km_report(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1488 | |
| 1489 | extern void xfrm_input_init(void); |
Al Viro | 6067b2b | 2006-09-27 18:47:59 -0700 | [diff] [blame] | 1490 | extern int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1491 | |
| 1492 | extern void xfrm_probe_algs(void); |
| 1493 | extern int xfrm_count_auth_supported(void); |
| 1494 | extern int xfrm_count_enc_supported(void); |
| 1495 | extern struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx); |
| 1496 | extern struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx); |
| 1497 | extern struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id); |
| 1498 | extern struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id); |
| 1499 | extern struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id); |
| 1500 | extern struct xfrm_algo_desc *xfrm_aalg_get_byname(char *name, int probe); |
| 1501 | extern struct xfrm_algo_desc *xfrm_ealg_get_byname(char *name, int probe); |
| 1502 | extern struct xfrm_algo_desc *xfrm_calg_get_byname(char *name, int probe); |
Herbert Xu | 1a6509d | 2008-01-28 19:37:29 -0800 | [diff] [blame] | 1503 | extern struct xfrm_algo_desc *xfrm_aead_get_byname(char *name, int icv_len, |
| 1504 | int probe); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1505 | |
Herbert Xu | 07d4ee5 | 2006-08-20 14:24:50 +1000 | [diff] [blame] | 1506 | struct hash_desc; |
Herbert Xu | 9409f38 | 2006-08-06 19:49:12 +1000 | [diff] [blame] | 1507 | struct scatterlist; |
Herbert Xu | 07d4ee5 | 2006-08-20 14:24:50 +1000 | [diff] [blame] | 1508 | typedef int (icv_update_fn_t)(struct hash_desc *, struct scatterlist *, |
| 1509 | unsigned int); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1510 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1511 | static inline int xfrm_addr_cmp(xfrm_address_t *a, xfrm_address_t *b, |
| 1512 | int family) |
| 1513 | { |
| 1514 | switch (family) { |
| 1515 | default: |
| 1516 | case AF_INET: |
jamal | a633746 | 2010-02-09 13:21:17 +0000 | [diff] [blame] | 1517 | return (__force u32)a->a4 - (__force u32)b->a4; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1518 | case AF_INET6: |
| 1519 | return ipv6_addr_cmp((struct in6_addr *)a, |
| 1520 | (struct in6_addr *)b); |
| 1521 | } |
| 1522 | } |
| 1523 | |
Herbert Xu | 77d8d7a | 2005-10-05 12:15:12 -0700 | [diff] [blame] | 1524 | static inline int xfrm_policy_id2dir(u32 index) |
| 1525 | { |
| 1526 | return index & 7; |
| 1527 | } |
| 1528 | |
Alexey Dobriyan | a6483b7 | 2008-11-25 17:38:20 -0800 | [diff] [blame] | 1529 | #ifdef CONFIG_XFRM |
| 1530 | static inline int xfrm_aevent_is_on(struct net *net) |
Jamal Hadi Salim | f8cd548 | 2006-03-20 19:15:11 -0800 | [diff] [blame] | 1531 | { |
Patrick McHardy | be33690 | 2006-03-20 22:40:54 -0800 | [diff] [blame] | 1532 | struct sock *nlsk; |
| 1533 | int ret = 0; |
| 1534 | |
| 1535 | rcu_read_lock(); |
Alexey Dobriyan | a6483b7 | 2008-11-25 17:38:20 -0800 | [diff] [blame] | 1536 | nlsk = rcu_dereference(net->xfrm.nlsk); |
Patrick McHardy | be33690 | 2006-03-20 22:40:54 -0800 | [diff] [blame] | 1537 | if (nlsk) |
| 1538 | ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS); |
| 1539 | rcu_read_unlock(); |
| 1540 | return ret; |
Jamal Hadi Salim | f8cd548 | 2006-03-20 19:15:11 -0800 | [diff] [blame] | 1541 | } |
Alexey Dobriyan | a6483b7 | 2008-11-25 17:38:20 -0800 | [diff] [blame] | 1542 | #endif |
Jamal Hadi Salim | f8cd548 | 2006-03-20 19:15:11 -0800 | [diff] [blame] | 1543 | |
Eric Dumazet | 0f99be0 | 2008-01-08 23:39:06 -0800 | [diff] [blame] | 1544 | static inline int xfrm_alg_len(struct xfrm_algo *alg) |
| 1545 | { |
| 1546 | return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); |
| 1547 | } |
| 1548 | |
Martin Willi | 4447bb3 | 2009-11-25 00:29:52 +0000 | [diff] [blame] | 1549 | static inline int xfrm_alg_auth_len(struct xfrm_algo_auth *alg) |
| 1550 | { |
| 1551 | return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); |
| 1552 | } |
| 1553 | |
Shinta Sugimoto | 80c9aba | 2007-02-08 13:11:42 -0800 | [diff] [blame] | 1554 | #ifdef CONFIG_XFRM_MIGRATE |
| 1555 | static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig) |
| 1556 | { |
Eric Dumazet | 0f99be0 | 2008-01-08 23:39:06 -0800 | [diff] [blame] | 1557 | return kmemdup(orig, xfrm_alg_len(orig), GFP_KERNEL); |
Shinta Sugimoto | 80c9aba | 2007-02-08 13:11:42 -0800 | [diff] [blame] | 1558 | } |
| 1559 | |
Martin Willi | 4447bb3 | 2009-11-25 00:29:52 +0000 | [diff] [blame] | 1560 | static inline struct xfrm_algo_auth *xfrm_algo_auth_clone(struct xfrm_algo_auth *orig) |
| 1561 | { |
| 1562 | return kmemdup(orig, xfrm_alg_auth_len(orig), GFP_KERNEL); |
| 1563 | } |
| 1564 | |
Shinta Sugimoto | 80c9aba | 2007-02-08 13:11:42 -0800 | [diff] [blame] | 1565 | static inline void xfrm_states_put(struct xfrm_state **states, int n) |
| 1566 | { |
| 1567 | int i; |
| 1568 | for (i = 0; i < n; i++) |
| 1569 | xfrm_state_put(*(states + i)); |
| 1570 | } |
| 1571 | |
| 1572 | static inline void xfrm_states_delete(struct xfrm_state **states, int n) |
| 1573 | { |
| 1574 | int i; |
| 1575 | for (i = 0; i < n; i++) |
| 1576 | xfrm_state_delete(*(states + i)); |
| 1577 | } |
| 1578 | #endif |
Jamal Hadi Salim | f8cd548 | 2006-03-20 19:15:11 -0800 | [diff] [blame] | 1579 | |
Alexey Dobriyan | def8b4f | 2008-10-28 13:24:06 -0700 | [diff] [blame] | 1580 | #ifdef CONFIG_XFRM |
Herbert Xu | 0050112 | 2007-12-11 01:53:43 -0800 | [diff] [blame] | 1581 | static inline struct xfrm_state *xfrm_input_state(struct sk_buff *skb) |
| 1582 | { |
| 1583 | return skb->sp->xvec[skb->sp->len - 1]; |
| 1584 | } |
Alexey Dobriyan | def8b4f | 2008-10-28 13:24:06 -0700 | [diff] [blame] | 1585 | #endif |
Herbert Xu | 0050112 | 2007-12-11 01:53:43 -0800 | [diff] [blame] | 1586 | |
Jamal Hadi Salim | bf825f81 | 2010-02-22 11:32:54 +0000 | [diff] [blame] | 1587 | static inline int xfrm_mark_get(struct nlattr **attrs, struct xfrm_mark *m) |
| 1588 | { |
| 1589 | if (attrs[XFRMA_MARK]) |
| 1590 | memcpy(m, nla_data(attrs[XFRMA_MARK]), sizeof(m)); |
| 1591 | else |
| 1592 | m->v = m->m = 0; |
| 1593 | |
| 1594 | return m->v & m->m; |
| 1595 | } |
| 1596 | |
| 1597 | static inline int xfrm_mark_put(struct sk_buff *skb, struct xfrm_mark *m) |
| 1598 | { |
| 1599 | if (m->m | m->v) |
| 1600 | NLA_PUT(skb, XFRMA_MARK, sizeof(struct xfrm_mark), m); |
| 1601 | return 0; |
| 1602 | |
| 1603 | nla_put_failure: |
| 1604 | return -1; |
| 1605 | } |
| 1606 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1607 | #endif /* _NET_XFRM_H */ |