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> |
Timo Teräs | fe1a5f0 | 2010-04-07 00:30:04 +0000 | [diff] [blame] | 23 | #include <net/flow.h> |
Yury Polyanskiy | 9e0d57f | 2009-11-08 20:58:41 -0800 | [diff] [blame] | 24 | |
| 25 | #include <linux/interrupt.h> |
| 26 | |
Masahide NAKAMURA | 558f82e | 2007-12-20 20:42:57 -0800 | [diff] [blame] | 27 | #ifdef CONFIG_XFRM_STATISTICS |
| 28 | #include <net/snmp.h> |
| 29 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | |
Masahide NAKAMURA | d3d6dd3 | 2007-06-26 23:57:49 -0700 | [diff] [blame] | 31 | #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 Dichtel | fa9921e | 2011-02-02 06:29:02 +0000 | [diff] [blame] | 39 | #define XFRM_ALIGN4(len) (((len) + 3) & ~3) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | #define XFRM_ALIGN8(len) (((len) + 7) & ~7) |
Herbert Xu | b59f45d | 2006-05-27 23:05:54 -0700 | [diff] [blame] | 41 | #define MODULE_ALIAS_XFRM_MODE(family, encap) \ |
| 42 | MODULE_ALIAS("xfrm-mode-" __stringify(family) "-" __stringify(encap)) |
Masahide NAKAMURA | d3d6dd3 | 2007-06-26 23:57:49 -0700 | [diff] [blame] | 43 | #define MODULE_ALIAS_XFRM_TYPE(family, proto) \ |
| 44 | MODULE_ALIAS("xfrm-type-" __stringify(family) "-" __stringify(proto)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | |
Masahide NAKAMURA | 558f82e | 2007-12-20 20:42:57 -0800 | [diff] [blame] | 46 | #ifdef CONFIG_XFRM_STATISTICS |
Alexey Dobriyan | 59c9940 | 2008-11-25 17:59:52 -0800 | [diff] [blame] | 47 | #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 NAKAMURA | 558f82e | 2007-12-20 20:42:57 -0800 | [diff] [blame] | 50 | #else |
Alexey Dobriyan | 59c9940 | 2008-11-25 17:59:52 -0800 | [diff] [blame] | 51 | #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 NAKAMURA | 558f82e | 2007-12-20 20:42:57 -0800 | [diff] [blame] | 54 | #endif |
| 55 | |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 56 | extern struct mutex xfrm_cfg_mutex; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 57 | |
| 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 Xu | 12a169e | 2008-10-01 07:03:24 -0700 | [diff] [blame] | 119 | struct 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 129 | /* Full description of state of transformer. */ |
Eric Dumazet | fd2c3ef | 2009-11-03 03:26:03 +0000 | [diff] [blame] | 130 | struct xfrm_state { |
Alexey Dobriyan | 673c09b | 2008-11-25 17:15:16 -0800 | [diff] [blame] | 131 | #ifdef CONFIG_NET_NS |
| 132 | struct net *xs_net; |
| 133 | #endif |
Herbert Xu | abb81c4 | 2008-09-09 19:58:29 -0700 | [diff] [blame] | 134 | union { |
Herbert Xu | 12a169e | 2008-10-01 07:03:24 -0700 | [diff] [blame] | 135 | struct hlist_node gclist; |
Herbert Xu | abb81c4 | 2008-09-09 19:58:29 -0700 | [diff] [blame] | 136 | struct hlist_node bydst; |
| 137 | }; |
David S. Miller | 8f126e3 | 2006-08-24 02:45:07 -0700 | [diff] [blame] | 138 | struct hlist_node bysrc; |
| 139 | struct hlist_node byspi; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 140 | |
| 141 | atomic_t refcnt; |
| 142 | spinlock_t lock; |
| 143 | |
| 144 | struct xfrm_id id; |
| 145 | struct xfrm_selector sel; |
Jamal Hadi Salim | bf825f81 | 2010-02-22 11:32:54 +0000 | [diff] [blame] | 146 | struct xfrm_mark mark; |
Martin Willi | 35d2856 | 2010-12-08 04:37:49 +0000 | [diff] [blame] | 147 | u32 tfcpad; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 148 | |
David S. Miller | 9d4a706 | 2006-08-24 03:18:09 -0700 | [diff] [blame] | 149 | u32 genid; |
| 150 | |
Herbert Xu | 12a169e | 2008-10-01 07:03:24 -0700 | [diff] [blame] | 151 | /* Key manager bits */ |
| 152 | struct xfrm_state_walk km; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 153 | |
| 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 Willi | 4447bb3 | 2009-11-25 00:29:52 +0000 | [diff] [blame] | 170 | struct xfrm_algo_auth *aalg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 171 | struct xfrm_algo *ealg; |
| 172 | struct xfrm_algo *calg; |
Herbert Xu | 1a6509d | 2008-01-28 19:37:29 -0800 | [diff] [blame] | 173 | struct xfrm_algo_aead *aead; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 174 | |
| 175 | /* Data for encapsulator */ |
| 176 | struct xfrm_encap_tmpl *encap; |
| 177 | |
Noriaki TAKAMIYA | 060f02a | 2006-08-23 18:18:55 -0700 | [diff] [blame] | 178 | /* Data for care-of address */ |
| 179 | xfrm_address_t *coaddr; |
| 180 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 181 | /* 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 Klassert | 9736acf | 2011-03-08 00:05:43 +0000 | [diff] [blame] | 189 | struct xfrm_replay_state_esn *replay_esn; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 190 | |
Jamal Hadi Salim | f8cd548 | 2006-03-20 19:15:11 -0800 | [diff] [blame] | 191 | /* Replay detection state at the time we sent the last notification */ |
| 192 | struct xfrm_replay_state preplay; |
Steffen Klassert | 9736acf | 2011-03-08 00:05:43 +0000 | [diff] [blame] | 193 | struct xfrm_replay_state_esn *preplay_esn; |
Jamal Hadi Salim | f8cd548 | 2006-03-20 19:15:11 -0800 | [diff] [blame] | 194 | |
Steffen Klassert | 9fdc488 | 2011-03-08 00:08:32 +0000 | [diff] [blame] | 195 | /* The functions for replay detection. */ |
| 196 | struct xfrm_replay *repl; |
| 197 | |
Jamal Hadi Salim | 2717096 | 2006-04-14 15:03:05 -0700 | [diff] [blame] | 198 | /* internal flag that only holds state for delayed aevent at the |
| 199 | * moment |
| 200 | */ |
| 201 | u32 xflags; |
| 202 | |
Jamal Hadi Salim | f8cd548 | 2006-03-20 19:15:11 -0800 | [diff] [blame] | 203 | /* 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 210 | /* Statistics */ |
| 211 | struct xfrm_stats stats; |
| 212 | |
| 213 | struct xfrm_lifetime_cur curlft; |
Yury Polyanskiy | 9e0d57f | 2009-11-08 20:58:41 -0800 | [diff] [blame] | 214 | struct tasklet_hrtimer mtimer; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 215 | |
Fan Du | e3c0d04 | 2012-07-30 21:43:54 +0000 | [diff] [blame] | 216 | /* used to fix curlft->add_time when changing date */ |
| 217 | long saved_tmo; |
| 218 | |
Masahide NAKAMURA | 9afaca0 | 2006-08-23 18:20:16 -0700 | [diff] [blame] | 219 | /* Last used time */ |
Herbert Xu | d26f398 | 2007-11-13 21:47:08 -0800 | [diff] [blame] | 220 | unsigned long lastused; |
Masahide NAKAMURA | 9afaca0 | 2006-08-23 18:20:16 -0700 | [diff] [blame] | 221 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 222 | /* Reference to data common to all the instances of this |
| 223 | * transformer. */ |
Eric Dumazet | 533cb5b | 2008-01-30 19:11:50 -0800 | [diff] [blame] | 224 | const struct xfrm_type *type; |
Herbert Xu | 1399637 | 2007-10-17 21:35:51 -0700 | [diff] [blame] | 225 | struct xfrm_mode *inner_mode; |
Kazunori MIYAZAWA | df9dcb4 | 2008-03-24 14:51:51 -0700 | [diff] [blame] | 226 | struct xfrm_mode *inner_mode_iaf; |
Herbert Xu | 1399637 | 2007-10-17 21:35:51 -0700 | [diff] [blame] | 227 | struct xfrm_mode *outer_mode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 228 | |
Trent Jaeger | df71837 | 2005-12-13 23:12:27 -0800 | [diff] [blame] | 229 | /* Security context */ |
| 230 | struct xfrm_sec_ctx *security; |
| 231 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 232 | /* Private data of this transformer, format is opaque, |
| 233 | * interpreted by xfrm_type methods. */ |
| 234 | void *data; |
| 235 | }; |
| 236 | |
Alexey Dobriyan | 673c09b | 2008-11-25 17:15:16 -0800 | [diff] [blame] | 237 | static inline struct net *xs_net(struct xfrm_state *x) |
| 238 | { |
| 239 | return read_pnet(&x->xs_net); |
| 240 | } |
| 241 | |
Jamal Hadi Salim | 2717096 | 2006-04-14 15:03:05 -0700 | [diff] [blame] | 242 | /* xflags - make enum if more show up */ |
| 243 | #define XFRM_TIME_DEFER 1 |
Fan Du | e3c0d04 | 2012-07-30 21:43:54 +0000 | [diff] [blame] | 244 | #define XFRM_SOFT_EXPIRE 2 |
Jamal Hadi Salim | 2717096 | 2006-04-14 15:03:05 -0700 | [diff] [blame] | 245 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 246 | enum { |
| 247 | XFRM_STATE_VOID, |
| 248 | XFRM_STATE_ACQ, |
| 249 | XFRM_STATE_VALID, |
| 250 | XFRM_STATE_ERROR, |
| 251 | XFRM_STATE_EXPIRED, |
| 252 | XFRM_STATE_DEAD |
| 253 | }; |
| 254 | |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 255 | /* callback structure passed from either netlink or pfkey */ |
Eric Dumazet | fd2c3ef | 2009-11-03 03:26:03 +0000 | [diff] [blame] | 256 | struct km_event { |
Herbert Xu | bf08867 | 2005-06-18 22:44:00 -0700 | [diff] [blame] | 257 | union { |
| 258 | u32 hard; |
| 259 | u32 proto; |
| 260 | u32 byid; |
Jamal Hadi Salim | f8cd548 | 2006-03-20 19:15:11 -0800 | [diff] [blame] | 261 | u32 aevent; |
Masahide NAKAMURA | f7b6983 | 2006-08-23 22:49:28 -0700 | [diff] [blame] | 262 | u32 type; |
Herbert Xu | bf08867 | 2005-06-18 22:44:00 -0700 | [diff] [blame] | 263 | } data; |
| 264 | |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 265 | u32 seq; |
| 266 | u32 pid; |
| 267 | u32 event; |
Alexey Dobriyan | 7067802 | 2008-11-25 17:50:36 -0800 | [diff] [blame] | 268 | struct net *net; |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 269 | }; |
| 270 | |
Steffen Klassert | 9fdc488 | 2011-03-08 00:08:32 +0000 | [diff] [blame] | 271 | struct xfrm_replay { |
| 272 | void (*advance)(struct xfrm_state *x, __be32 net_seq); |
| 273 | int (*check)(struct xfrm_state *x, |
| 274 | struct sk_buff *skb, |
| 275 | __be32 net_seq); |
| 276 | void (*notify)(struct xfrm_state *x, int event); |
| 277 | int (*overflow)(struct xfrm_state *x, struct sk_buff *skb); |
| 278 | }; |
| 279 | |
Herbert Xu | 25ee328 | 2007-12-11 09:32:34 -0800 | [diff] [blame] | 280 | struct net_device; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 281 | struct xfrm_type; |
| 282 | struct xfrm_dst; |
| 283 | struct xfrm_policy_afinfo { |
| 284 | unsigned short family; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 285 | struct dst_ops *dst_ops; |
Alexey Dobriyan | ddcfd79 | 2008-11-25 17:37:23 -0800 | [diff] [blame] | 286 | void (*garbage_collect)(struct net *net); |
Alexey Dobriyan | c5b3cf4 | 2008-11-25 17:51:25 -0800 | [diff] [blame] | 287 | struct dst_entry *(*dst_lookup)(struct net *net, int tos, |
David S. Miller | 5e6b930 | 2011-02-24 00:14:45 -0500 | [diff] [blame] | 288 | const xfrm_address_t *saddr, |
| 289 | const xfrm_address_t *daddr); |
Alexey Dobriyan | fbda33b | 2008-11-25 17:56:49 -0800 | [diff] [blame] | 290 | 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] | 291 | void (*decode_session)(struct sk_buff *skb, |
Herbert Xu | d5422ef | 2007-12-12 10:44:16 -0800 | [diff] [blame] | 292 | struct flowi *fl, |
| 293 | int reverse); |
David S. Miller | 05d8402 | 2011-02-22 17:47:10 -0800 | [diff] [blame] | 294 | int (*get_tos)(const struct flowi *fl); |
Masahide NAKAMURA | a1b0514 | 2007-12-20 20:41:12 -0800 | [diff] [blame] | 295 | int (*init_path)(struct xfrm_dst *path, |
| 296 | struct dst_entry *dst, |
| 297 | int nfheader_len); |
Herbert Xu | 25ee328 | 2007-12-11 09:32:34 -0800 | [diff] [blame] | 298 | int (*fill_dst)(struct xfrm_dst *xdst, |
Herbert Xu | 87c1e12 | 2010-03-02 02:51:56 +0000 | [diff] [blame] | 299 | struct net_device *dev, |
David S. Miller | 0c7b3ee | 2011-02-22 17:48:57 -0800 | [diff] [blame] | 300 | const struct flowi *fl); |
David S. Miller | 2774c13 | 2011-03-01 14:59:04 -0800 | [diff] [blame] | 301 | struct dst_entry *(*blackhole_route)(struct net *net, struct dst_entry *orig); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 302 | }; |
| 303 | |
| 304 | extern int xfrm_policy_register_afinfo(struct xfrm_policy_afinfo *afinfo); |
| 305 | extern int xfrm_policy_unregister_afinfo(struct xfrm_policy_afinfo *afinfo); |
David S. Miller | 214e005 | 2011-02-24 00:02:38 -0500 | [diff] [blame] | 306 | extern void km_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c); |
| 307 | extern void km_state_notify(struct xfrm_state *x, const struct km_event *c); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 308 | |
| 309 | struct xfrm_tmpl; |
Jamal Hadi Salim | 980ebd2 | 2006-03-20 19:16:40 -0800 | [diff] [blame] | 310 | 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] | 311 | extern void km_state_expired(struct xfrm_state *x, int hard, u32 pid); |
| 312 | extern int __xfrm_state_delete(struct xfrm_state *x); |
| 313 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 314 | struct xfrm_state_afinfo { |
Herbert Xu | 17c2a42 | 2007-10-17 21:33:12 -0700 | [diff] [blame] | 315 | unsigned int family; |
Herbert Xu | 36cf9ac | 2007-11-13 21:40:52 -0800 | [diff] [blame] | 316 | unsigned int proto; |
Al Viro | 8e3d716 | 2008-03-17 22:49:16 -0700 | [diff] [blame] | 317 | __be16 eth_proto; |
Herbert Xu | 17c2a42 | 2007-10-17 21:33:12 -0700 | [diff] [blame] | 318 | struct module *owner; |
Eric Dumazet | 533cb5b | 2008-01-30 19:11:50 -0800 | [diff] [blame] | 319 | const struct xfrm_type *type_map[IPPROTO_MAX]; |
Herbert Xu | aa5d62c | 2007-10-17 21:31:12 -0700 | [diff] [blame] | 320 | struct xfrm_mode *mode_map[XFRM_MODE_MAX]; |
Herbert Xu | d094cd8 | 2005-06-20 13:19:41 -0700 | [diff] [blame] | 321 | int (*init_flags)(struct xfrm_state *x); |
David S. Miller | 73e5ebb | 2011-02-22 17:51:44 -0800 | [diff] [blame] | 322 | void (*init_tempsel)(struct xfrm_selector *sel, |
| 323 | const struct flowi *fl); |
David S. Miller | 19bd624 | 2011-02-24 00:07:20 -0500 | [diff] [blame] | 324 | void (*init_temprop)(struct xfrm_state *x, |
| 325 | const struct xfrm_tmpl *tmpl, |
| 326 | const xfrm_address_t *daddr, |
| 327 | const xfrm_address_t *saddr); |
Masahide NAKAMURA | 41a49cc | 2006-08-23 22:48:31 -0700 | [diff] [blame] | 328 | int (*tmpl_sort)(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n); |
| 329 | 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] | 330 | int (*output)(struct sk_buff *skb); |
Steffen Klassert | 43a4dea | 2011-05-09 19:36:38 +0000 | [diff] [blame] | 331 | int (*output_finish)(struct sk_buff *skb); |
Herbert Xu | 227620e | 2007-11-13 21:41:28 -0800 | [diff] [blame] | 332 | int (*extract_input)(struct xfrm_state *x, |
| 333 | struct sk_buff *skb); |
Herbert Xu | 36cf9ac | 2007-11-13 21:40:52 -0800 | [diff] [blame] | 334 | int (*extract_output)(struct xfrm_state *x, |
| 335 | struct sk_buff *skb); |
Herbert Xu | 716062f | 2007-11-13 21:44:23 -0800 | [diff] [blame] | 336 | int (*transport_finish)(struct sk_buff *skb, |
| 337 | int async); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 338 | }; |
| 339 | |
| 340 | extern int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo); |
| 341 | extern int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo); |
| 342 | |
| 343 | extern void xfrm_state_delete_tunnel(struct xfrm_state *x); |
| 344 | |
Eric Dumazet | fd2c3ef | 2009-11-03 03:26:03 +0000 | [diff] [blame] | 345 | struct xfrm_type { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 346 | char *description; |
| 347 | struct module *owner; |
jamal | a633746 | 2010-02-09 13:21:17 +0000 | [diff] [blame] | 348 | u8 proto; |
| 349 | u8 flags; |
Masahide NAKAMURA | 1b5c229 | 2006-08-23 18:11:50 -0700 | [diff] [blame] | 350 | #define XFRM_TYPE_NON_FRAGMENT 1 |
Herbert Xu | 436a0a4 | 2007-10-08 17:25:53 -0700 | [diff] [blame] | 351 | #define XFRM_TYPE_REPLAY_PROT 2 |
Herbert Xu | f04e7e8 | 2007-11-13 21:36:51 -0800 | [diff] [blame] | 352 | #define XFRM_TYPE_LOCAL_COADDR 4 |
| 353 | #define XFRM_TYPE_REMOTE_COADDR 8 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 354 | |
Herbert Xu | 72cb696 | 2005-06-20 13:18:08 -0700 | [diff] [blame] | 355 | int (*init_state)(struct xfrm_state *x); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 356 | void (*destructor)(struct xfrm_state *); |
Herbert Xu | e695633 | 2006-04-01 00:52:46 -0800 | [diff] [blame] | 357 | int (*input)(struct xfrm_state *, struct sk_buff *skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 358 | int (*output)(struct xfrm_state *, struct sk_buff *pskb); |
David S. Miller | 8f029de | 2011-02-22 17:59:59 -0800 | [diff] [blame] | 359 | int (*reject)(struct xfrm_state *, struct sk_buff *, |
| 360 | const struct flowi *); |
Masahide NAKAMURA | aee5adb | 2006-08-23 17:57:28 -0700 | [diff] [blame] | 361 | int (*hdr_offset)(struct xfrm_state *, struct sk_buff *, u8 **); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 362 | /* Estimate maximal size of result of transformation of a dgram */ |
Patrick McHardy | c5c2523 | 2007-04-09 11:47:18 -0700 | [diff] [blame] | 363 | u32 (*get_mtu)(struct xfrm_state *, int size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 364 | }; |
| 365 | |
Eric Dumazet | 533cb5b | 2008-01-30 19:11:50 -0800 | [diff] [blame] | 366 | extern int xfrm_register_type(const struct xfrm_type *type, unsigned short family); |
| 367 | 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] | 368 | |
Herbert Xu | b59f45d | 2006-05-27 23:05:54 -0700 | [diff] [blame] | 369 | struct xfrm_mode { |
Herbert Xu | 227620e | 2007-11-13 21:41:28 -0800 | [diff] [blame] | 370 | /* |
| 371 | * Remove encapsulation header. |
| 372 | * |
| 373 | * The IP header will be moved over the top of the encapsulation |
| 374 | * header. |
| 375 | * |
| 376 | * On entry, the transport header shall point to where the IP header |
| 377 | * should be and the network header shall be set to where the IP |
| 378 | * header currently is. skb->data shall point to the start of the |
| 379 | * payload. |
| 380 | */ |
| 381 | int (*input2)(struct xfrm_state *x, struct sk_buff *skb); |
| 382 | |
| 383 | /* |
| 384 | * This is the actual input entry point. |
| 385 | * |
| 386 | * For transport mode and equivalent this would be identical to |
| 387 | * input2 (which does not need to be set). While tunnel mode |
| 388 | * and equivalent would set this to the tunnel encapsulation function |
| 389 | * xfrm4_prepare_input that would in turn call input2. |
| 390 | */ |
Herbert Xu | b59f45d | 2006-05-27 23:05:54 -0700 | [diff] [blame] | 391 | int (*input)(struct xfrm_state *x, struct sk_buff *skb); |
Herbert Xu | 37fedd3 | 2007-10-10 15:44:44 -0700 | [diff] [blame] | 392 | |
| 393 | /* |
| 394 | * Add encapsulation header. |
| 395 | * |
| 396 | * On exit, the transport header will be set to the start of the |
| 397 | * encapsulation header to be filled in by x->type->output and |
| 398 | * the mac header will be set to the nextheader (protocol for |
| 399 | * IPv4) field of the extension header directly preceding the |
| 400 | * encapsulation header, or in its absence, that of the top IP |
| 401 | * header. The value of the network header will always point |
| 402 | * to the top IP header while skb->data will point to the payload. |
| 403 | */ |
Herbert Xu | 36cf9ac | 2007-11-13 21:40:52 -0800 | [diff] [blame] | 404 | int (*output2)(struct xfrm_state *x,struct sk_buff *skb); |
| 405 | |
| 406 | /* |
| 407 | * This is the actual output entry point. |
| 408 | * |
| 409 | * For transport mode and equivalent this would be identical to |
| 410 | * output2 (which does not need to be set). While tunnel mode |
| 411 | * and equivalent would set this to a tunnel encapsulation function |
| 412 | * (xfrm4_prepare_output or xfrm6_prepare_output) that would in turn |
| 413 | * call output2. |
| 414 | */ |
| 415 | int (*output)(struct xfrm_state *x, struct sk_buff *skb); |
Herbert Xu | b59f45d | 2006-05-27 23:05:54 -0700 | [diff] [blame] | 416 | |
Herbert Xu | 17c2a42 | 2007-10-17 21:33:12 -0700 | [diff] [blame] | 417 | struct xfrm_state_afinfo *afinfo; |
Herbert Xu | b59f45d | 2006-05-27 23:05:54 -0700 | [diff] [blame] | 418 | struct module *owner; |
| 419 | unsigned int encap; |
Herbert Xu | 1bfcb10 | 2007-10-17 21:31:50 -0700 | [diff] [blame] | 420 | int flags; |
| 421 | }; |
| 422 | |
| 423 | /* Flags for xfrm_mode. */ |
| 424 | enum { |
| 425 | XFRM_MODE_FLAG_TUNNEL = 1, |
Herbert Xu | b59f45d | 2006-05-27 23:05:54 -0700 | [diff] [blame] | 426 | }; |
| 427 | |
| 428 | extern int xfrm_register_mode(struct xfrm_mode *mode, int family); |
| 429 | extern int xfrm_unregister_mode(struct xfrm_mode *mode, int family); |
Herbert Xu | b59f45d | 2006-05-27 23:05:54 -0700 | [diff] [blame] | 430 | |
Kazunori MIYAZAWA | df9dcb4 | 2008-03-24 14:51:51 -0700 | [diff] [blame] | 431 | static inline int xfrm_af2proto(unsigned int family) |
| 432 | { |
| 433 | switch(family) { |
| 434 | case AF_INET: |
| 435 | return IPPROTO_IPIP; |
| 436 | case AF_INET6: |
| 437 | return IPPROTO_IPV6; |
| 438 | default: |
| 439 | return 0; |
| 440 | } |
| 441 | } |
| 442 | |
| 443 | static inline struct xfrm_mode *xfrm_ip2inner_mode(struct xfrm_state *x, int ipproto) |
| 444 | { |
| 445 | if ((ipproto == IPPROTO_IPIP && x->props.family == AF_INET) || |
| 446 | (ipproto == IPPROTO_IPV6 && x->props.family == AF_INET6)) |
| 447 | return x->inner_mode; |
| 448 | else |
| 449 | return x->inner_mode_iaf; |
| 450 | } |
| 451 | |
Eric Dumazet | fd2c3ef | 2009-11-03 03:26:03 +0000 | [diff] [blame] | 452 | struct xfrm_tmpl { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 453 | /* id in template is interpreted as: |
| 454 | * daddr - destination of tunnel, may be zero for transport mode. |
| 455 | * spi - zero to acquire spi. Not zero if spi is static, then |
| 456 | * daddr must be fixed too. |
| 457 | * proto - AH/ESP/IPCOMP |
| 458 | */ |
| 459 | struct xfrm_id id; |
| 460 | |
| 461 | /* Source address of tunnel. Ignored, if it is not a tunnel. */ |
| 462 | xfrm_address_t saddr; |
| 463 | |
Miika Komu | 76b3f05 | 2006-11-30 16:40:43 -0800 | [diff] [blame] | 464 | unsigned short encap_family; |
| 465 | |
jamal | a633746 | 2010-02-09 13:21:17 +0000 | [diff] [blame] | 466 | u32 reqid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 467 | |
Masahide NAKAMURA | 7e49e6d | 2006-09-22 15:05:15 -0700 | [diff] [blame] | 468 | /* Mode: transport, tunnel etc. */ |
jamal | a633746 | 2010-02-09 13:21:17 +0000 | [diff] [blame] | 469 | u8 mode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 470 | |
| 471 | /* Sharing mode: unique, this session only, this user only etc. */ |
jamal | a633746 | 2010-02-09 13:21:17 +0000 | [diff] [blame] | 472 | u8 share; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 473 | |
| 474 | /* May skip this transfomration if no SA is found */ |
jamal | a633746 | 2010-02-09 13:21:17 +0000 | [diff] [blame] | 475 | u8 optional; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 476 | |
Herbert Xu | c5d18e9 | 2008-04-22 00:46:42 -0700 | [diff] [blame] | 477 | /* Skip aalgos/ealgos/calgos checks. */ |
jamal | a633746 | 2010-02-09 13:21:17 +0000 | [diff] [blame] | 478 | u8 allalgs; |
Herbert Xu | c5d18e9 | 2008-04-22 00:46:42 -0700 | [diff] [blame] | 479 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 480 | /* Bit mask of algos allowed for acquisition */ |
jamal | a633746 | 2010-02-09 13:21:17 +0000 | [diff] [blame] | 481 | u32 aalgos; |
| 482 | u32 ealgos; |
| 483 | u32 calgos; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 484 | }; |
| 485 | |
Masahide NAKAMURA | 622dc82 | 2006-08-23 17:52:01 -0700 | [diff] [blame] | 486 | #define XFRM_MAX_DEPTH 6 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 487 | |
Herbert Xu | 12a169e | 2008-10-01 07:03:24 -0700 | [diff] [blame] | 488 | struct xfrm_policy_walk_entry { |
| 489 | struct list_head all; |
| 490 | u8 dead; |
| 491 | }; |
| 492 | |
| 493 | struct xfrm_policy_walk { |
| 494 | struct xfrm_policy_walk_entry walk; |
| 495 | u8 type; |
| 496 | u32 seq; |
| 497 | }; |
| 498 | |
Eric Dumazet | fd2c3ef | 2009-11-03 03:26:03 +0000 | [diff] [blame] | 499 | struct xfrm_policy { |
Alexey Dobriyan | 0331b1f | 2008-11-25 17:21:45 -0800 | [diff] [blame] | 500 | #ifdef CONFIG_NET_NS |
| 501 | struct net *xp_net; |
| 502 | #endif |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 503 | struct hlist_node bydst; |
| 504 | struct hlist_node byidx; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 505 | |
| 506 | /* This lock only affects elements except for entry. */ |
| 507 | rwlock_t lock; |
| 508 | atomic_t refcnt; |
| 509 | struct timer_list timer; |
| 510 | |
Timo Teräs | fe1a5f0 | 2010-04-07 00:30:04 +0000 | [diff] [blame] | 511 | struct flow_cache_object flo; |
Timo Teräs | 80c802f | 2010-04-07 00:30:05 +0000 | [diff] [blame] | 512 | atomic_t genid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 513 | u32 priority; |
| 514 | u32 index; |
Jamal Hadi Salim | bf825f81 | 2010-02-22 11:32:54 +0000 | [diff] [blame] | 515 | struct xfrm_mark mark; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 516 | struct xfrm_selector selector; |
| 517 | struct xfrm_lifetime_cfg lft; |
| 518 | struct xfrm_lifetime_cur curlft; |
Herbert Xu | 12a169e | 2008-10-01 07:03:24 -0700 | [diff] [blame] | 519 | struct xfrm_policy_walk_entry walk; |
Arnaldo Carvalho de Melo | 46ca5f5 | 2006-11-27 17:58:59 -0200 | [diff] [blame] | 520 | u8 type; |
| 521 | u8 action; |
| 522 | u8 flags; |
Arnaldo Carvalho de Melo | 46ca5f5 | 2006-11-27 17:58:59 -0200 | [diff] [blame] | 523 | u8 xfrm_nr; |
Herbert Xu | 12a169e | 2008-10-01 07:03:24 -0700 | [diff] [blame] | 524 | u16 family; |
Trent Jaeger | df71837 | 2005-12-13 23:12:27 -0800 | [diff] [blame] | 525 | struct xfrm_sec_ctx *security; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 526 | struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH]; |
| 527 | }; |
| 528 | |
David S. Miller | 63eb23f | 2011-02-24 01:25:19 -0500 | [diff] [blame] | 529 | static inline struct net *xp_net(const struct xfrm_policy *xp) |
Alexey Dobriyan | 0331b1f | 2008-11-25 17:21:45 -0800 | [diff] [blame] | 530 | { |
| 531 | return read_pnet(&xp->xp_net); |
| 532 | } |
| 533 | |
Arnaud Ebalard | 13c1d18 | 2008-10-05 13:33:42 -0700 | [diff] [blame] | 534 | struct xfrm_kmaddress { |
| 535 | xfrm_address_t local; |
| 536 | xfrm_address_t remote; |
| 537 | u32 reserved; |
| 538 | u16 family; |
| 539 | }; |
| 540 | |
Shinta Sugimoto | 80c9aba | 2007-02-08 13:11:42 -0800 | [diff] [blame] | 541 | struct xfrm_migrate { |
| 542 | xfrm_address_t old_daddr; |
| 543 | xfrm_address_t old_saddr; |
| 544 | xfrm_address_t new_daddr; |
| 545 | xfrm_address_t new_saddr; |
| 546 | u8 proto; |
| 547 | u8 mode; |
| 548 | u16 reserved; |
| 549 | u32 reqid; |
| 550 | u16 old_family; |
| 551 | u16 new_family; |
| 552 | }; |
| 553 | |
Jamal Hadi Salim | f8cd548 | 2006-03-20 19:15:11 -0800 | [diff] [blame] | 554 | #define XFRM_KM_TIMEOUT 30 |
| 555 | /* which seqno */ |
| 556 | #define XFRM_REPLAY_SEQ 1 |
| 557 | #define XFRM_REPLAY_OSEQ 2 |
| 558 | #define XFRM_REPLAY_SEQ_MASK 3 |
| 559 | /* what happened */ |
| 560 | #define XFRM_REPLAY_UPDATE XFRM_AE_CR |
| 561 | #define XFRM_REPLAY_TIMEOUT XFRM_AE_CE |
| 562 | |
| 563 | /* default aevent timeout in units of 100ms */ |
| 564 | #define XFRM_AE_ETIME 10 |
| 565 | /* Async Event timer multiplier */ |
| 566 | #define XFRM_AE_ETH_M 10 |
| 567 | /* default seq threshold size */ |
| 568 | #define XFRM_AE_SEQT_SIZE 2 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 569 | |
Eric Dumazet | fd2c3ef | 2009-11-03 03:26:03 +0000 | [diff] [blame] | 570 | struct xfrm_mgr { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 571 | struct list_head list; |
| 572 | char *id; |
David S. Miller | 214e005 | 2011-02-24 00:02:38 -0500 | [diff] [blame] | 573 | int (*notify)(struct xfrm_state *x, const struct km_event *c); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 574 | 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] | 575 | 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] | 576 | int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); |
David S. Miller | 214e005 | 2011-02-24 00:02:38 -0500 | [diff] [blame] | 577 | int (*notify_policy)(struct xfrm_policy *x, int dir, const struct km_event *c); |
Alexey Dobriyan | db983c1 | 2008-11-25 17:51:01 -0800 | [diff] [blame] | 578 | int (*report)(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr); |
David S. Miller | 183cad1 | 2011-02-24 00:28:01 -0500 | [diff] [blame] | 579 | int (*migrate)(const struct xfrm_selector *sel, |
| 580 | u8 dir, u8 type, |
| 581 | const struct xfrm_migrate *m, |
| 582 | int num_bundles, |
| 583 | const struct xfrm_kmaddress *k); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 584 | }; |
| 585 | |
| 586 | extern int xfrm_register_km(struct xfrm_mgr *km); |
| 587 | extern int xfrm_unregister_km(struct xfrm_mgr *km); |
| 588 | |
Herbert Xu | 436a0a4 | 2007-10-08 17:25:53 -0700 | [diff] [blame] | 589 | /* |
| 590 | * This structure is used for the duration where packets are being |
| 591 | * transformed by IPsec. As soon as the packet leaves IPsec the |
| 592 | * area beyond the generic IP part may be overwritten. |
| 593 | */ |
| 594 | struct xfrm_skb_cb { |
| 595 | union { |
| 596 | struct inet_skb_parm h4; |
| 597 | struct inet6_skb_parm h6; |
| 598 | } header; |
| 599 | |
| 600 | /* Sequence number for replay protection. */ |
Herbert Xu | b318e0e | 2008-02-12 22:50:35 -0800 | [diff] [blame] | 601 | union { |
Steffen Klassert | 1ce3644 | 2011-03-08 00:06:31 +0000 | [diff] [blame] | 602 | struct { |
| 603 | __u32 low; |
| 604 | __u32 hi; |
| 605 | } output; |
| 606 | struct { |
| 607 | __be32 low; |
| 608 | __be32 hi; |
| 609 | } input; |
Herbert Xu | b318e0e | 2008-02-12 22:50:35 -0800 | [diff] [blame] | 610 | } seq; |
Herbert Xu | 436a0a4 | 2007-10-08 17:25:53 -0700 | [diff] [blame] | 611 | }; |
| 612 | |
| 613 | #define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0])) |
| 614 | |
Herbert Xu | 36cf9ac | 2007-11-13 21:40:52 -0800 | [diff] [blame] | 615 | /* |
| 616 | * This structure is used by the afinfo prepare_input/prepare_output functions |
| 617 | * to transmit header information to the mode input/output functions. |
| 618 | */ |
| 619 | struct xfrm_mode_skb_cb { |
| 620 | union { |
| 621 | struct inet_skb_parm h4; |
| 622 | struct inet6_skb_parm h6; |
| 623 | } header; |
| 624 | |
| 625 | /* Copied from header for IPv4, always set to zero and DF for IPv6. */ |
| 626 | __be16 id; |
| 627 | __be16 frag_off; |
| 628 | |
Herbert Xu | 732c8bd | 2008-03-26 16:51:09 -0700 | [diff] [blame] | 629 | /* IP header length (excluding options or extension headers). */ |
| 630 | u8 ihl; |
| 631 | |
Herbert Xu | 36cf9ac | 2007-11-13 21:40:52 -0800 | [diff] [blame] | 632 | /* TOS for IPv4, class for IPv6. */ |
| 633 | u8 tos; |
| 634 | |
| 635 | /* TTL for IPv4, hop limitfor IPv6. */ |
| 636 | u8 ttl; |
| 637 | |
| 638 | /* Protocol for IPv4, NH for IPv6. */ |
| 639 | u8 protocol; |
| 640 | |
Herbert Xu | 732c8bd | 2008-03-26 16:51:09 -0700 | [diff] [blame] | 641 | /* Option length for IPv4, zero for IPv6. */ |
| 642 | u8 optlen; |
| 643 | |
Herbert Xu | 36cf9ac | 2007-11-13 21:40:52 -0800 | [diff] [blame] | 644 | /* Used by IPv6 only, zero for IPv4. */ |
| 645 | u8 flow_lbl[3]; |
| 646 | }; |
| 647 | |
| 648 | #define XFRM_MODE_SKB_CB(__skb) ((struct xfrm_mode_skb_cb *)&((__skb)->cb[0])) |
| 649 | |
Herbert Xu | 716062f | 2007-11-13 21:44:23 -0800 | [diff] [blame] | 650 | /* |
| 651 | * This structure is used by the input processing to locate the SPI and |
| 652 | * related information. |
| 653 | */ |
| 654 | struct xfrm_spi_skb_cb { |
| 655 | union { |
| 656 | struct inet_skb_parm h4; |
| 657 | struct inet6_skb_parm h6; |
| 658 | } header; |
| 659 | |
Herbert Xu | 716062f | 2007-11-13 21:44:23 -0800 | [diff] [blame] | 660 | unsigned int daddroff; |
Herbert Xu | 2fcb45b | 2007-12-03 22:54:12 -0800 | [diff] [blame] | 661 | unsigned int family; |
Herbert Xu | 716062f | 2007-11-13 21:44:23 -0800 | [diff] [blame] | 662 | }; |
| 663 | |
| 664 | #define XFRM_SPI_SKB_CB(__skb) ((struct xfrm_spi_skb_cb *)&((__skb)->cb[0])) |
| 665 | |
Joy Latten | 161a09e | 2006-11-27 13:11:54 -0600 | [diff] [blame] | 666 | /* Audit Information */ |
Eric Dumazet | fd2c3ef | 2009-11-03 03:26:03 +0000 | [diff] [blame] | 667 | struct xfrm_audit { |
Joy Latten | 161a09e | 2006-11-27 13:11:54 -0600 | [diff] [blame] | 668 | u32 secid; |
Eric Paris | 2532386 | 2008-04-18 10:09:25 -0400 | [diff] [blame] | 669 | uid_t loginuid; |
| 670 | u32 sessionid; |
Joy Latten | 161a09e | 2006-11-27 13:11:54 -0600 | [diff] [blame] | 671 | }; |
Joy Latten | c9204d9 | 2006-11-30 15:50:43 -0600 | [diff] [blame] | 672 | |
| 673 | #ifdef CONFIG_AUDITSYSCALL |
Paul Moore | afeb14b | 2007-12-21 14:58:11 -0800 | [diff] [blame] | 674 | static inline struct audit_buffer *xfrm_audit_start(const char *op) |
Joy Latten | ab5f5e8 | 2007-09-17 11:51:22 -0700 | [diff] [blame] | 675 | { |
| 676 | struct audit_buffer *audit_buf = NULL; |
Paul Moore | afeb14b | 2007-12-21 14:58:11 -0800 | [diff] [blame] | 677 | |
| 678 | if (audit_enabled == 0) |
| 679 | return NULL; |
| 680 | audit_buf = audit_log_start(current->audit_context, GFP_ATOMIC, |
| 681 | AUDIT_MAC_IPSEC_EVENT); |
| 682 | if (audit_buf == NULL) |
| 683 | return NULL; |
| 684 | audit_log_format(audit_buf, "op=%s", op); |
| 685 | return audit_buf; |
| 686 | } |
| 687 | |
Eric Paris | 2532386 | 2008-04-18 10:09:25 -0400 | [diff] [blame] | 688 | 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] | 689 | struct audit_buffer *audit_buf) |
| 690 | { |
Joy Latten | ab5f5e8 | 2007-09-17 11:51:22 -0700 | [diff] [blame] | 691 | char *secctx; |
| 692 | u32 secctx_len; |
| 693 | |
Eric Paris | 2532386 | 2008-04-18 10:09:25 -0400 | [diff] [blame] | 694 | audit_log_format(audit_buf, " auid=%u ses=%u", auid, ses); |
Paul Moore | 68277ac | 2007-12-20 20:49:33 -0800 | [diff] [blame] | 695 | if (secid != 0 && |
| 696 | security_secid_to_secctx(secid, &secctx, &secctx_len) == 0) { |
Joy Latten | ab5f5e8 | 2007-09-17 11:51:22 -0700 | [diff] [blame] | 697 | audit_log_format(audit_buf, " subj=%s", secctx); |
| 698 | security_release_secctx(secctx, secctx_len); |
| 699 | } else |
| 700 | audit_log_task_context(audit_buf); |
Joy Latten | ab5f5e8 | 2007-09-17 11:51:22 -0700 | [diff] [blame] | 701 | } |
| 702 | |
| 703 | extern void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, |
Eric Paris | 2532386 | 2008-04-18 10:09:25 -0400 | [diff] [blame] | 704 | u32 auid, u32 ses, u32 secid); |
Joy Latten | ab5f5e8 | 2007-09-17 11:51:22 -0700 | [diff] [blame] | 705 | extern void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, |
Eric Paris | 2532386 | 2008-04-18 10:09:25 -0400 | [diff] [blame] | 706 | u32 auid, u32 ses, u32 secid); |
Joy Latten | ab5f5e8 | 2007-09-17 11:51:22 -0700 | [diff] [blame] | 707 | extern void xfrm_audit_state_add(struct xfrm_state *x, int result, |
Eric Paris | 2532386 | 2008-04-18 10:09:25 -0400 | [diff] [blame] | 708 | u32 auid, u32 ses, u32 secid); |
Joy Latten | ab5f5e8 | 2007-09-17 11:51:22 -0700 | [diff] [blame] | 709 | extern void xfrm_audit_state_delete(struct xfrm_state *x, int result, |
Eric Paris | 2532386 | 2008-04-18 10:09:25 -0400 | [diff] [blame] | 710 | u32 auid, u32 ses, u32 secid); |
Paul Moore | afeb14b | 2007-12-21 14:58:11 -0800 | [diff] [blame] | 711 | extern void xfrm_audit_state_replay_overflow(struct xfrm_state *x, |
| 712 | struct sk_buff *skb); |
Steffen Klassert | 9fdc488 | 2011-03-08 00:08:32 +0000 | [diff] [blame] | 713 | extern void xfrm_audit_state_replay(struct xfrm_state *x, |
| 714 | struct sk_buff *skb, __be32 net_seq); |
Paul Moore | afeb14b | 2007-12-21 14:58:11 -0800 | [diff] [blame] | 715 | extern void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family); |
| 716 | extern void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, |
| 717 | __be32 net_spi, __be32 net_seq); |
| 718 | extern void xfrm_audit_state_icvfail(struct xfrm_state *x, |
| 719 | struct sk_buff *skb, u8 proto); |
Joy Latten | c9204d9 | 2006-11-30 15:50:43 -0600 | [diff] [blame] | 720 | #else |
Marcin Slusarz | 41fef0e | 2008-05-03 21:03:01 -0700 | [diff] [blame] | 721 | |
| 722 | static inline void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, |
| 723 | u32 auid, u32 ses, u32 secid) |
| 724 | { |
| 725 | } |
| 726 | |
| 727 | static inline void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, |
| 728 | u32 auid, u32 ses, u32 secid) |
| 729 | { |
| 730 | } |
| 731 | |
| 732 | static inline void xfrm_audit_state_add(struct xfrm_state *x, int result, |
| 733 | u32 auid, u32 ses, u32 secid) |
| 734 | { |
| 735 | } |
| 736 | |
| 737 | static inline void xfrm_audit_state_delete(struct xfrm_state *x, int result, |
| 738 | u32 auid, u32 ses, u32 secid) |
| 739 | { |
| 740 | } |
| 741 | |
| 742 | static inline void xfrm_audit_state_replay_overflow(struct xfrm_state *x, |
| 743 | struct sk_buff *skb) |
| 744 | { |
| 745 | } |
| 746 | |
Steffen Klassert | 9fdc488 | 2011-03-08 00:08:32 +0000 | [diff] [blame] | 747 | static inline void xfrm_audit_state_replay(struct xfrm_state *x, |
| 748 | struct sk_buff *skb, __be32 net_seq) |
| 749 | { |
| 750 | } |
| 751 | |
Marcin Slusarz | 41fef0e | 2008-05-03 21:03:01 -0700 | [diff] [blame] | 752 | static inline void xfrm_audit_state_notfound_simple(struct sk_buff *skb, |
| 753 | u16 family) |
| 754 | { |
| 755 | } |
| 756 | |
| 757 | static inline void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, |
| 758 | __be32 net_spi, __be32 net_seq) |
| 759 | { |
| 760 | } |
| 761 | |
| 762 | static inline void xfrm_audit_state_icvfail(struct xfrm_state *x, |
| 763 | struct sk_buff *skb, u8 proto) |
| 764 | { |
| 765 | } |
Joy Latten | c9204d9 | 2006-11-30 15:50:43 -0600 | [diff] [blame] | 766 | #endif /* CONFIG_AUDITSYSCALL */ |
Joy Latten | 161a09e | 2006-11-27 13:11:54 -0600 | [diff] [blame] | 767 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 768 | static inline void xfrm_pol_hold(struct xfrm_policy *policy) |
| 769 | { |
| 770 | if (likely(policy != NULL)) |
| 771 | atomic_inc(&policy->refcnt); |
| 772 | } |
| 773 | |
WANG Cong | 64c31b3 | 2008-01-07 22:34:29 -0800 | [diff] [blame] | 774 | extern void xfrm_policy_destroy(struct xfrm_policy *policy); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 775 | |
| 776 | static inline void xfrm_pol_put(struct xfrm_policy *policy) |
| 777 | { |
| 778 | if (atomic_dec_and_test(&policy->refcnt)) |
WANG Cong | 64c31b3 | 2008-01-07 22:34:29 -0800 | [diff] [blame] | 779 | xfrm_policy_destroy(policy); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 780 | } |
| 781 | |
Masahide NAKAMURA | 4e81bb8 | 2006-08-23 22:43:30 -0700 | [diff] [blame] | 782 | static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols) |
| 783 | { |
| 784 | int i; |
| 785 | for (i = npols - 1; i >= 0; --i) |
| 786 | xfrm_pol_put(pols[i]); |
| 787 | } |
Masahide NAKAMURA | 4e81bb8 | 2006-08-23 22:43:30 -0700 | [diff] [blame] | 788 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 789 | extern void __xfrm_state_destroy(struct xfrm_state *); |
| 790 | |
Herbert Xu | 21380b8 | 2006-02-22 14:47:13 -0800 | [diff] [blame] | 791 | static inline void __xfrm_state_put(struct xfrm_state *x) |
| 792 | { |
| 793 | atomic_dec(&x->refcnt); |
| 794 | } |
| 795 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 796 | static inline void xfrm_state_put(struct xfrm_state *x) |
| 797 | { |
| 798 | if (atomic_dec_and_test(&x->refcnt)) |
| 799 | __xfrm_state_destroy(x); |
| 800 | } |
| 801 | |
| 802 | static inline void xfrm_state_hold(struct xfrm_state *x) |
| 803 | { |
| 804 | atomic_inc(&x->refcnt); |
| 805 | } |
| 806 | |
David S. Miller | 1744a8f | 2011-02-22 18:02:12 -0800 | [diff] [blame] | 807 | static inline bool addr_match(const void *token1, const void *token2, |
| 808 | int prefixlen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 809 | { |
David S. Miller | 1744a8f | 2011-02-22 18:02:12 -0800 | [diff] [blame] | 810 | const __be32 *a1 = token1; |
| 811 | const __be32 *a2 = token2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 812 | int pdw; |
| 813 | int pbi; |
| 814 | |
jamal | a633746 | 2010-02-09 13:21:17 +0000 | [diff] [blame] | 815 | pdw = prefixlen >> 5; /* num of whole u32 in prefix */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 816 | pbi = prefixlen & 0x1f; /* num of bits in incomplete u32 in prefix */ |
| 817 | |
| 818 | if (pdw) |
| 819 | if (memcmp(a1, a2, pdw << 2)) |
David S. Miller | 1744a8f | 2011-02-22 18:02:12 -0800 | [diff] [blame] | 820 | return false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 821 | |
| 822 | if (pbi) { |
Al Viro | 5f19343 | 2006-09-27 18:46:32 -0700 | [diff] [blame] | 823 | __be32 mask; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 824 | |
| 825 | mask = htonl((0xffffffff) << (32 - pbi)); |
| 826 | |
| 827 | if ((a1[pdw] ^ a2[pdw]) & mask) |
David S. Miller | 1744a8f | 2011-02-22 18:02:12 -0800 | [diff] [blame] | 828 | return false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 829 | } |
| 830 | |
David S. Miller | 1744a8f | 2011-02-22 18:02:12 -0800 | [diff] [blame] | 831 | return true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 832 | } |
| 833 | |
Alexey Dobriyan | 26bff94 | 2011-11-22 06:46:02 +0000 | [diff] [blame] | 834 | static inline bool addr4_match(__be32 a1, __be32 a2, u8 prefixlen) |
| 835 | { |
| 836 | /* C99 6.5.7 (3): u32 << 32 is undefined behaviour */ |
| 837 | if (prefixlen == 0) |
| 838 | return true; |
| 839 | return !((a1 ^ a2) & htonl(0xFFFFFFFFu << (32 - prefixlen))); |
| 840 | } |
| 841 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 842 | static __inline__ |
David S. Miller | 6281dcc | 2011-03-12 00:43:55 -0500 | [diff] [blame] | 843 | __be16 xfrm_flowi_sport(const struct flowi *fl, const union flowi_uli *uli) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 844 | { |
Al Viro | f9d07e41f8 | 2006-09-27 18:45:50 -0700 | [diff] [blame] | 845 | __be16 port; |
David S. Miller | 1d28f42 | 2011-03-12 00:29:39 -0500 | [diff] [blame] | 846 | switch(fl->flowi_proto) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 847 | case IPPROTO_TCP: |
| 848 | case IPPROTO_UDP: |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 849 | case IPPROTO_UDPLITE: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 850 | case IPPROTO_SCTP: |
David S. Miller | 6281dcc | 2011-03-12 00:43:55 -0500 | [diff] [blame] | 851 | port = uli->ports.sport; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 852 | break; |
| 853 | case IPPROTO_ICMP: |
| 854 | case IPPROTO_ICMPV6: |
David S. Miller | 6281dcc | 2011-03-12 00:43:55 -0500 | [diff] [blame] | 855 | port = htons(uli->icmpt.type); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 856 | break; |
Masahide NAKAMURA | 2ce4272 | 2006-08-23 20:39:03 -0700 | [diff] [blame] | 857 | case IPPROTO_MH: |
David S. Miller | 6281dcc | 2011-03-12 00:43:55 -0500 | [diff] [blame] | 858 | port = htons(uli->mht.type); |
Masahide NAKAMURA | 2ce4272 | 2006-08-23 20:39:03 -0700 | [diff] [blame] | 859 | break; |
Timo Teräs | cc9ff19 | 2010-11-03 04:41:38 +0000 | [diff] [blame] | 860 | case IPPROTO_GRE: |
David S. Miller | 6281dcc | 2011-03-12 00:43:55 -0500 | [diff] [blame] | 861 | port = htons(ntohl(uli->gre_key) >> 16); |
Timo Teräs | cc9ff19 | 2010-11-03 04:41:38 +0000 | [diff] [blame] | 862 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 863 | default: |
| 864 | port = 0; /*XXX*/ |
| 865 | } |
| 866 | return port; |
| 867 | } |
| 868 | |
| 869 | static __inline__ |
David S. Miller | 6281dcc | 2011-03-12 00:43:55 -0500 | [diff] [blame] | 870 | __be16 xfrm_flowi_dport(const struct flowi *fl, const union flowi_uli *uli) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 871 | { |
Al Viro | f9d07e41f8 | 2006-09-27 18:45:50 -0700 | [diff] [blame] | 872 | __be16 port; |
David S. Miller | 1d28f42 | 2011-03-12 00:29:39 -0500 | [diff] [blame] | 873 | switch(fl->flowi_proto) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 874 | case IPPROTO_TCP: |
| 875 | case IPPROTO_UDP: |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 876 | case IPPROTO_UDPLITE: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 877 | case IPPROTO_SCTP: |
David S. Miller | 6281dcc | 2011-03-12 00:43:55 -0500 | [diff] [blame] | 878 | port = uli->ports.dport; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 879 | break; |
| 880 | case IPPROTO_ICMP: |
| 881 | case IPPROTO_ICMPV6: |
David S. Miller | 6281dcc | 2011-03-12 00:43:55 -0500 | [diff] [blame] | 882 | port = htons(uli->icmpt.code); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 883 | break; |
Timo Teräs | cc9ff19 | 2010-11-03 04:41:38 +0000 | [diff] [blame] | 884 | case IPPROTO_GRE: |
David S. Miller | 6281dcc | 2011-03-12 00:43:55 -0500 | [diff] [blame] | 885 | port = htons(ntohl(uli->gre_key) & 0xffff); |
Timo Teräs | cc9ff19 | 2010-11-03 04:41:38 +0000 | [diff] [blame] | 886 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 887 | default: |
| 888 | port = 0; /*XXX*/ |
| 889 | } |
| 890 | return port; |
| 891 | } |
| 892 | |
David S. Miller | bc9b35a | 2012-05-15 15:04:57 -0400 | [diff] [blame] | 893 | extern bool xfrm_selector_match(const struct xfrm_selector *sel, |
| 894 | const struct flowi *fl, |
| 895 | unsigned short family); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 896 | |
Trent Jaeger | df71837 | 2005-12-13 23:12:27 -0800 | [diff] [blame] | 897 | #ifdef CONFIG_SECURITY_NETWORK_XFRM |
| 898 | /* If neither has a context --> match |
| 899 | * Otherwise, both must have a context and the sids, doi, alg must match |
| 900 | */ |
David S. Miller | bc9b35a | 2012-05-15 15:04:57 -0400 | [diff] [blame] | 901 | static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) |
Trent Jaeger | df71837 | 2005-12-13 23:12:27 -0800 | [diff] [blame] | 902 | { |
| 903 | return ((!s1 && !s2) || |
| 904 | (s1 && s2 && |
| 905 | (s1->ctx_sid == s2->ctx_sid) && |
| 906 | (s1->ctx_doi == s2->ctx_doi) && |
| 907 | (s1->ctx_alg == s2->ctx_alg))); |
| 908 | } |
| 909 | #else |
David S. Miller | bc9b35a | 2012-05-15 15:04:57 -0400 | [diff] [blame] | 910 | static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) |
Trent Jaeger | df71837 | 2005-12-13 23:12:27 -0800 | [diff] [blame] | 911 | { |
David S. Miller | bc9b35a | 2012-05-15 15:04:57 -0400 | [diff] [blame] | 912 | return true; |
Trent Jaeger | df71837 | 2005-12-13 23:12:27 -0800 | [diff] [blame] | 913 | } |
| 914 | #endif |
| 915 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 916 | /* A struct encoding bundle of transformations to apply to some set of flow. |
| 917 | * |
| 918 | * dst->child points to the next element of bundle. |
| 919 | * dst->xfrm points to an instanse of transformer. |
| 920 | * |
| 921 | * Due to unfortunate limitations of current routing cache, which we |
| 922 | * have no time to fix, it mirrors struct rtable and bound to the same |
| 923 | * routing key, including saddr,daddr. However, we can have many of |
| 924 | * bundles differing by session id. All the bundles grow from a parent |
| 925 | * policy rule. |
| 926 | */ |
Eric Dumazet | fd2c3ef | 2009-11-03 03:26:03 +0000 | [diff] [blame] | 927 | struct xfrm_dst { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 928 | union { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 929 | struct dst_entry dst; |
| 930 | struct rtable rt; |
| 931 | struct rt6_info rt6; |
| 932 | } u; |
| 933 | struct dst_entry *route; |
Timo Teräs | 80c802f | 2010-04-07 00:30:05 +0000 | [diff] [blame] | 934 | struct flow_cache_object flo; |
| 935 | struct xfrm_policy *pols[XFRM_POLICY_TYPE_MAX]; |
| 936 | int num_pols, num_xfrms; |
Masahide NAKAMURA | 157bfc2 | 2007-04-30 00:33:35 -0700 | [diff] [blame] | 937 | #ifdef CONFIG_XFRM_SUB_POLICY |
| 938 | struct flowi *origin; |
| 939 | struct xfrm_selector *partner; |
| 940 | #endif |
Timo Teräs | 80c802f | 2010-04-07 00:30:05 +0000 | [diff] [blame] | 941 | u32 xfrm_genid; |
| 942 | u32 policy_genid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 943 | u32 route_mtu_cached; |
| 944 | u32 child_mtu_cached; |
Hideaki YOSHIFUJI | 92d63dec | 2005-05-26 12:58:04 -0700 | [diff] [blame] | 945 | u32 route_cookie; |
| 946 | u32 path_cookie; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 947 | }; |
| 948 | |
Alexey Dobriyan | def8b4f | 2008-10-28 13:24:06 -0700 | [diff] [blame] | 949 | #ifdef CONFIG_XFRM |
Herbert Xu | aabc976 | 2005-05-03 16:27:10 -0700 | [diff] [blame] | 950 | static inline void xfrm_dst_destroy(struct xfrm_dst *xdst) |
| 951 | { |
Timo Teräs | 80c802f | 2010-04-07 00:30:05 +0000 | [diff] [blame] | 952 | xfrm_pols_put(xdst->pols, xdst->num_pols); |
Herbert Xu | aabc976 | 2005-05-03 16:27:10 -0700 | [diff] [blame] | 953 | dst_release(xdst->route); |
| 954 | if (likely(xdst->u.dst.xfrm)) |
| 955 | xfrm_state_put(xdst->u.dst.xfrm); |
Masahide NAKAMURA | 157bfc2 | 2007-04-30 00:33:35 -0700 | [diff] [blame] | 956 | #ifdef CONFIG_XFRM_SUB_POLICY |
| 957 | kfree(xdst->origin); |
| 958 | xdst->origin = NULL; |
| 959 | kfree(xdst->partner); |
| 960 | xdst->partner = NULL; |
| 961 | #endif |
Herbert Xu | aabc976 | 2005-05-03 16:27:10 -0700 | [diff] [blame] | 962 | } |
Alexey Dobriyan | def8b4f | 2008-10-28 13:24:06 -0700 | [diff] [blame] | 963 | #endif |
Herbert Xu | aabc976 | 2005-05-03 16:27:10 -0700 | [diff] [blame] | 964 | |
| 965 | extern void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev); |
| 966 | |
Eric Dumazet | fd2c3ef | 2009-11-03 03:26:03 +0000 | [diff] [blame] | 967 | struct sec_path { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 968 | atomic_t refcnt; |
| 969 | int len; |
Herbert Xu | dbe5b4a | 2006-04-01 00:54:16 -0800 | [diff] [blame] | 970 | struct xfrm_state *xvec[XFRM_MAX_DEPTH]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 971 | }; |
| 972 | |
Michael Smith | 990078a | 2011-04-07 04:51:51 +0000 | [diff] [blame] | 973 | static inline int secpath_exists(struct sk_buff *skb) |
| 974 | { |
| 975 | #ifdef CONFIG_XFRM |
| 976 | return skb->sp != NULL; |
| 977 | #else |
| 978 | return 0; |
| 979 | #endif |
| 980 | } |
| 981 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 982 | static inline struct sec_path * |
| 983 | secpath_get(struct sec_path *sp) |
| 984 | { |
| 985 | if (sp) |
| 986 | atomic_inc(&sp->refcnt); |
| 987 | return sp; |
| 988 | } |
| 989 | |
| 990 | extern void __secpath_destroy(struct sec_path *sp); |
| 991 | |
| 992 | static inline void |
| 993 | secpath_put(struct sec_path *sp) |
| 994 | { |
| 995 | if (sp && atomic_dec_and_test(&sp->refcnt)) |
| 996 | __secpath_destroy(sp); |
| 997 | } |
| 998 | |
| 999 | extern struct sec_path *secpath_dup(struct sec_path *src); |
| 1000 | |
| 1001 | static inline void |
| 1002 | secpath_reset(struct sk_buff *skb) |
| 1003 | { |
| 1004 | #ifdef CONFIG_XFRM |
| 1005 | secpath_put(skb->sp); |
| 1006 | skb->sp = NULL; |
| 1007 | #endif |
| 1008 | } |
| 1009 | |
| 1010 | static inline int |
David S. Miller | 6cc3296 | 2011-02-24 00:19:59 -0500 | [diff] [blame] | 1011 | xfrm_addr_any(const xfrm_address_t *addr, unsigned short family) |
Patrick McHardy | a1e59ab | 2006-09-19 12:57:34 -0700 | [diff] [blame] | 1012 | { |
| 1013 | switch (family) { |
| 1014 | case AF_INET: |
| 1015 | return addr->a4 == 0; |
| 1016 | case AF_INET6: |
| 1017 | return ipv6_addr_any((struct in6_addr *)&addr->a6); |
| 1018 | } |
| 1019 | return 0; |
| 1020 | } |
| 1021 | |
| 1022 | static inline int |
David S. Miller | 21eddb5 | 2011-02-24 01:35:16 -0500 | [diff] [blame] | 1023 | __xfrm4_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1024 | { |
| 1025 | return (tmpl->saddr.a4 && |
| 1026 | tmpl->saddr.a4 != x->props.saddr.a4); |
| 1027 | } |
| 1028 | |
| 1029 | static inline int |
David S. Miller | 21eddb5 | 2011-02-24 01:35:16 -0500 | [diff] [blame] | 1030 | __xfrm6_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1031 | { |
| 1032 | return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) && |
| 1033 | ipv6_addr_cmp((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr)); |
| 1034 | } |
| 1035 | |
| 1036 | static inline int |
David S. Miller | 21eddb5 | 2011-02-24 01:35:16 -0500 | [diff] [blame] | 1037 | xfrm_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x, unsigned short family) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1038 | { |
| 1039 | switch (family) { |
| 1040 | case AF_INET: |
| 1041 | return __xfrm4_state_addr_cmp(tmpl, x); |
| 1042 | case AF_INET6: |
| 1043 | return __xfrm6_state_addr_cmp(tmpl, x); |
| 1044 | } |
| 1045 | return !0; |
| 1046 | } |
| 1047 | |
| 1048 | #ifdef CONFIG_XFRM |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1049 | extern int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb, unsigned short family); |
| 1050 | |
Herbert Xu | d5422ef | 2007-12-12 10:44:16 -0800 | [diff] [blame] | 1051 | static inline int __xfrm_policy_check2(struct sock *sk, int dir, |
| 1052 | struct sk_buff *skb, |
| 1053 | unsigned int family, int reverse) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1054 | { |
Alexey Dobriyan | f6e1e25 | 2008-11-25 17:35:44 -0800 | [diff] [blame] | 1055 | struct net *net = dev_net(skb->dev); |
Herbert Xu | d5422ef | 2007-12-12 10:44:16 -0800 | [diff] [blame] | 1056 | int ndir = dir | (reverse ? XFRM_POLICY_MASK + 1 : 0); |
| 1057 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1058 | if (sk && sk->sk_policy[XFRM_POLICY_IN]) |
Herbert Xu | d5422ef | 2007-12-12 10:44:16 -0800 | [diff] [blame] | 1059 | return __xfrm_policy_check(sk, ndir, skb, family); |
Masahide NAKAMURA | 4e81bb8 | 2006-08-23 22:43:30 -0700 | [diff] [blame] | 1060 | |
Alexey Dobriyan | f6e1e25 | 2008-11-25 17:35:44 -0800 | [diff] [blame] | 1061 | return (!net->xfrm.policy_count[dir] && !skb->sp) || |
Eric Dumazet | adf3090 | 2009-06-02 05:19:30 +0000 | [diff] [blame] | 1062 | (skb_dst(skb)->flags & DST_NOPOLICY) || |
Herbert Xu | d5422ef | 2007-12-12 10:44:16 -0800 | [diff] [blame] | 1063 | __xfrm_policy_check(sk, ndir, skb, family); |
| 1064 | } |
| 1065 | |
| 1066 | static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) |
| 1067 | { |
| 1068 | return __xfrm_policy_check2(sk, dir, skb, family, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1069 | } |
| 1070 | |
| 1071 | static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) |
| 1072 | { |
| 1073 | return xfrm_policy_check(sk, dir, skb, AF_INET); |
| 1074 | } |
| 1075 | |
| 1076 | static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) |
| 1077 | { |
| 1078 | return xfrm_policy_check(sk, dir, skb, AF_INET6); |
| 1079 | } |
| 1080 | |
Herbert Xu | d5422ef | 2007-12-12 10:44:16 -0800 | [diff] [blame] | 1081 | static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir, |
| 1082 | struct sk_buff *skb) |
| 1083 | { |
| 1084 | return __xfrm_policy_check2(sk, dir, skb, AF_INET, 1); |
| 1085 | } |
| 1086 | |
| 1087 | static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir, |
| 1088 | struct sk_buff *skb) |
| 1089 | { |
| 1090 | return __xfrm_policy_check2(sk, dir, skb, AF_INET6, 1); |
| 1091 | } |
| 1092 | |
| 1093 | extern int __xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, |
| 1094 | unsigned int family, int reverse); |
| 1095 | |
| 1096 | static inline int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, |
| 1097 | unsigned int family) |
| 1098 | { |
| 1099 | return __xfrm_decode_session(skb, fl, family, 0); |
| 1100 | } |
| 1101 | |
| 1102 | static inline int xfrm_decode_session_reverse(struct sk_buff *skb, |
| 1103 | struct flowi *fl, |
| 1104 | unsigned int family) |
| 1105 | { |
| 1106 | return __xfrm_decode_session(skb, fl, family, 1); |
| 1107 | } |
| 1108 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1109 | extern int __xfrm_route_forward(struct sk_buff *skb, unsigned short family); |
| 1110 | |
| 1111 | static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family) |
| 1112 | { |
Alexey Dobriyan | 99a6665 | 2008-11-25 17:36:13 -0800 | [diff] [blame] | 1113 | struct net *net = dev_net(skb->dev); |
| 1114 | |
| 1115 | return !net->xfrm.policy_count[XFRM_POLICY_OUT] || |
Eric Dumazet | adf3090 | 2009-06-02 05:19:30 +0000 | [diff] [blame] | 1116 | (skb_dst(skb)->flags & DST_NOXFRM) || |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1117 | __xfrm_route_forward(skb, family); |
| 1118 | } |
| 1119 | |
| 1120 | static inline int xfrm4_route_forward(struct sk_buff *skb) |
| 1121 | { |
| 1122 | return xfrm_route_forward(skb, AF_INET); |
| 1123 | } |
| 1124 | |
| 1125 | static inline int xfrm6_route_forward(struct sk_buff *skb) |
| 1126 | { |
| 1127 | return xfrm_route_forward(skb, AF_INET6); |
| 1128 | } |
| 1129 | |
| 1130 | extern int __xfrm_sk_clone_policy(struct sock *sk); |
| 1131 | |
| 1132 | static inline int xfrm_sk_clone_policy(struct sock *sk) |
| 1133 | { |
| 1134 | if (unlikely(sk->sk_policy[0] || sk->sk_policy[1])) |
| 1135 | return __xfrm_sk_clone_policy(sk); |
| 1136 | return 0; |
| 1137 | } |
| 1138 | |
Herbert Xu | 4666faa | 2005-06-18 22:43:22 -0700 | [diff] [blame] | 1139 | extern int xfrm_policy_delete(struct xfrm_policy *pol, int dir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1140 | |
| 1141 | static inline void xfrm_sk_free_policy(struct sock *sk) |
| 1142 | { |
| 1143 | if (unlikely(sk->sk_policy[0] != NULL)) { |
| 1144 | xfrm_policy_delete(sk->sk_policy[0], XFRM_POLICY_MAX); |
| 1145 | sk->sk_policy[0] = NULL; |
| 1146 | } |
| 1147 | if (unlikely(sk->sk_policy[1] != NULL)) { |
| 1148 | xfrm_policy_delete(sk->sk_policy[1], XFRM_POLICY_MAX+1); |
| 1149 | sk->sk_policy[1] = NULL; |
| 1150 | } |
| 1151 | } |
| 1152 | |
| 1153 | #else |
| 1154 | |
| 1155 | static inline void xfrm_sk_free_policy(struct sock *sk) {} |
| 1156 | static inline int xfrm_sk_clone_policy(struct sock *sk) { return 0; } |
| 1157 | static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; } |
| 1158 | static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; } |
| 1159 | static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) |
| 1160 | { |
| 1161 | return 1; |
| 1162 | } |
| 1163 | static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) |
| 1164 | { |
| 1165 | return 1; |
| 1166 | } |
| 1167 | static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) |
| 1168 | { |
| 1169 | return 1; |
| 1170 | } |
Herbert Xu | d5422ef | 2007-12-12 10:44:16 -0800 | [diff] [blame] | 1171 | static inline int xfrm_decode_session_reverse(struct sk_buff *skb, |
| 1172 | struct flowi *fl, |
| 1173 | unsigned int family) |
| 1174 | { |
| 1175 | return -ENOSYS; |
| 1176 | } |
| 1177 | static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir, |
| 1178 | struct sk_buff *skb) |
| 1179 | { |
| 1180 | return 1; |
| 1181 | } |
| 1182 | static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir, |
| 1183 | struct sk_buff *skb) |
| 1184 | { |
| 1185 | return 1; |
| 1186 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1187 | #endif |
| 1188 | |
| 1189 | static __inline__ |
David S. Miller | e8a4e37 | 2011-02-22 17:42:56 -0800 | [diff] [blame] | 1190 | xfrm_address_t *xfrm_flowi_daddr(const struct flowi *fl, unsigned short family) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1191 | { |
| 1192 | switch (family){ |
| 1193 | case AF_INET: |
David S. Miller | 7e1dc7b | 2011-03-12 02:42:11 -0500 | [diff] [blame] | 1194 | return (xfrm_address_t *)&fl->u.ip4.daddr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1195 | case AF_INET6: |
David S. Miller | 7e1dc7b | 2011-03-12 02:42:11 -0500 | [diff] [blame] | 1196 | return (xfrm_address_t *)&fl->u.ip6.daddr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1197 | } |
| 1198 | return NULL; |
| 1199 | } |
| 1200 | |
| 1201 | static __inline__ |
David S. Miller | e8a4e37 | 2011-02-22 17:42:56 -0800 | [diff] [blame] | 1202 | xfrm_address_t *xfrm_flowi_saddr(const struct flowi *fl, unsigned short family) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1203 | { |
| 1204 | switch (family){ |
| 1205 | case AF_INET: |
David S. Miller | 7e1dc7b | 2011-03-12 02:42:11 -0500 | [diff] [blame] | 1206 | return (xfrm_address_t *)&fl->u.ip4.saddr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1207 | case AF_INET6: |
David S. Miller | 7e1dc7b | 2011-03-12 02:42:11 -0500 | [diff] [blame] | 1208 | return (xfrm_address_t *)&fl->u.ip6.saddr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1209 | } |
| 1210 | return NULL; |
| 1211 | } |
| 1212 | |
YOSHIFUJI Hideaki | 9bb182a | 2008-02-22 14:48:22 +0900 | [diff] [blame] | 1213 | static __inline__ |
David S. Miller | e8a4e37 | 2011-02-22 17:42:56 -0800 | [diff] [blame] | 1214 | void xfrm_flowi_addr_get(const struct flowi *fl, |
YOSHIFUJI Hideaki | 9bb182a | 2008-02-22 14:48:22 +0900 | [diff] [blame] | 1215 | xfrm_address_t *saddr, xfrm_address_t *daddr, |
| 1216 | unsigned short family) |
| 1217 | { |
| 1218 | switch(family) { |
| 1219 | case AF_INET: |
David S. Miller | 7e1dc7b | 2011-03-12 02:42:11 -0500 | [diff] [blame] | 1220 | memcpy(&saddr->a4, &fl->u.ip4.saddr, sizeof(saddr->a4)); |
| 1221 | memcpy(&daddr->a4, &fl->u.ip4.daddr, sizeof(daddr->a4)); |
YOSHIFUJI Hideaki | 9bb182a | 2008-02-22 14:48:22 +0900 | [diff] [blame] | 1222 | break; |
| 1223 | case AF_INET6: |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 1224 | *(struct in6_addr *)saddr->a6 = fl->u.ip6.saddr; |
| 1225 | *(struct in6_addr *)daddr->a6 = fl->u.ip6.daddr; |
YOSHIFUJI Hideaki | 9bb182a | 2008-02-22 14:48:22 +0900 | [diff] [blame] | 1226 | break; |
| 1227 | } |
| 1228 | } |
| 1229 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1230 | static __inline__ int |
David S. Miller | f884806 | 2011-02-24 01:42:28 -0500 | [diff] [blame] | 1231 | __xfrm4_state_addr_check(const struct xfrm_state *x, |
| 1232 | const xfrm_address_t *daddr, const xfrm_address_t *saddr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1233 | { |
| 1234 | if (daddr->a4 == x->id.daddr.a4 && |
| 1235 | (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4)) |
| 1236 | return 1; |
| 1237 | return 0; |
| 1238 | } |
| 1239 | |
| 1240 | static __inline__ int |
David S. Miller | f884806 | 2011-02-24 01:42:28 -0500 | [diff] [blame] | 1241 | __xfrm6_state_addr_check(const struct xfrm_state *x, |
| 1242 | const xfrm_address_t *daddr, const xfrm_address_t *saddr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1243 | { |
| 1244 | if (!ipv6_addr_cmp((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) && |
| 1245 | (!ipv6_addr_cmp((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr)|| |
| 1246 | ipv6_addr_any((struct in6_addr *)saddr) || |
| 1247 | ipv6_addr_any((struct in6_addr *)&x->props.saddr))) |
| 1248 | return 1; |
| 1249 | return 0; |
| 1250 | } |
| 1251 | |
| 1252 | static __inline__ int |
David S. Miller | f884806 | 2011-02-24 01:42:28 -0500 | [diff] [blame] | 1253 | xfrm_state_addr_check(const struct xfrm_state *x, |
| 1254 | const xfrm_address_t *daddr, const xfrm_address_t *saddr, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1255 | unsigned short family) |
| 1256 | { |
| 1257 | switch (family) { |
| 1258 | case AF_INET: |
| 1259 | return __xfrm4_state_addr_check(x, daddr, saddr); |
| 1260 | case AF_INET6: |
| 1261 | return __xfrm6_state_addr_check(x, daddr, saddr); |
| 1262 | } |
| 1263 | return 0; |
| 1264 | } |
| 1265 | |
Masahide NAKAMURA | e53820d | 2006-08-23 19:12:01 -0700 | [diff] [blame] | 1266 | static __inline__ int |
David S. Miller | f884806 | 2011-02-24 01:42:28 -0500 | [diff] [blame] | 1267 | xfrm_state_addr_flow_check(const struct xfrm_state *x, const struct flowi *fl, |
Masahide NAKAMURA | e53820d | 2006-08-23 19:12:01 -0700 | [diff] [blame] | 1268 | unsigned short family) |
| 1269 | { |
| 1270 | switch (family) { |
| 1271 | case AF_INET: |
| 1272 | return __xfrm4_state_addr_check(x, |
David S. Miller | 7e1dc7b | 2011-03-12 02:42:11 -0500 | [diff] [blame] | 1273 | (const xfrm_address_t *)&fl->u.ip4.daddr, |
| 1274 | (const xfrm_address_t *)&fl->u.ip4.saddr); |
Masahide NAKAMURA | e53820d | 2006-08-23 19:12:01 -0700 | [diff] [blame] | 1275 | case AF_INET6: |
| 1276 | return __xfrm6_state_addr_check(x, |
David S. Miller | 7e1dc7b | 2011-03-12 02:42:11 -0500 | [diff] [blame] | 1277 | (const xfrm_address_t *)&fl->u.ip6.daddr, |
| 1278 | (const xfrm_address_t *)&fl->u.ip6.saddr); |
Masahide NAKAMURA | e53820d | 2006-08-23 19:12:01 -0700 | [diff] [blame] | 1279 | } |
| 1280 | return 0; |
| 1281 | } |
| 1282 | |
David S. Miller | f884806 | 2011-02-24 01:42:28 -0500 | [diff] [blame] | 1283 | static inline int xfrm_state_kern(const struct xfrm_state *x) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1284 | { |
| 1285 | return atomic_read(&x->tunnel_users); |
| 1286 | } |
| 1287 | |
Masahide NAKAMURA | 5794708 | 2006-09-22 15:06:24 -0700 | [diff] [blame] | 1288 | static inline int xfrm_id_proto_match(u8 proto, u8 userproto) |
| 1289 | { |
Masahide NAKAMURA | dc00a52 | 2006-08-23 17:49:52 -0700 | [diff] [blame] | 1290 | return (!userproto || proto == userproto || |
| 1291 | (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH || |
| 1292 | proto == IPPROTO_ESP || |
| 1293 | proto == IPPROTO_COMP))); |
Masahide NAKAMURA | 5794708 | 2006-09-22 15:06:24 -0700 | [diff] [blame] | 1294 | } |
| 1295 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1296 | /* |
| 1297 | * xfrm algorithm information |
| 1298 | */ |
Herbert Xu | 1a6509d | 2008-01-28 19:37:29 -0800 | [diff] [blame] | 1299 | struct xfrm_algo_aead_info { |
| 1300 | u16 icv_truncbits; |
| 1301 | }; |
| 1302 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1303 | struct xfrm_algo_auth_info { |
| 1304 | u16 icv_truncbits; |
| 1305 | u16 icv_fullbits; |
| 1306 | }; |
| 1307 | |
| 1308 | struct xfrm_algo_encr_info { |
| 1309 | u16 blockbits; |
| 1310 | u16 defkeybits; |
| 1311 | }; |
| 1312 | |
| 1313 | struct xfrm_algo_comp_info { |
| 1314 | u16 threshold; |
| 1315 | }; |
| 1316 | |
| 1317 | struct xfrm_algo_desc { |
| 1318 | char *name; |
Herbert Xu | 04ff126 | 2006-08-13 08:50:00 +1000 | [diff] [blame] | 1319 | char *compat; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1320 | u8 available:1; |
| 1321 | union { |
Herbert Xu | 1a6509d | 2008-01-28 19:37:29 -0800 | [diff] [blame] | 1322 | struct xfrm_algo_aead_info aead; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1323 | struct xfrm_algo_auth_info auth; |
| 1324 | struct xfrm_algo_encr_info encr; |
| 1325 | struct xfrm_algo_comp_info comp; |
| 1326 | } uinfo; |
| 1327 | struct sadb_alg desc; |
| 1328 | }; |
| 1329 | |
| 1330 | /* XFRM tunnel handlers. */ |
| 1331 | struct xfrm_tunnel { |
| 1332 | int (*handler)(struct sk_buff *skb); |
jamal | a633746 | 2010-02-09 13:21:17 +0000 | [diff] [blame] | 1333 | int (*err_handler)(struct sk_buff *skb, u32 info); |
Herbert Xu | d2acc34 | 2006-03-28 01:12:13 -0800 | [diff] [blame] | 1334 | |
Eric Dumazet | b33eab0 | 2010-10-25 21:01:26 +0000 | [diff] [blame] | 1335 | struct xfrm_tunnel __rcu *next; |
Herbert Xu | d2acc34 | 2006-03-28 01:12:13 -0800 | [diff] [blame] | 1336 | int priority; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1337 | }; |
| 1338 | |
| 1339 | struct xfrm6_tunnel { |
Herbert Xu | d2acc34 | 2006-03-28 01:12:13 -0800 | [diff] [blame] | 1340 | int (*handler)(struct sk_buff *skb); |
| 1341 | int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt, |
Brian Haley | d5fdd6b | 2009-06-23 04:31:07 -0700 | [diff] [blame] | 1342 | u8 type, u8 code, int offset, __be32 info); |
Eric Dumazet | 6f0bcf1 | 2010-10-24 21:33:16 +0000 | [diff] [blame] | 1343 | struct xfrm6_tunnel __rcu *next; |
Herbert Xu | d2acc34 | 2006-03-28 01:12:13 -0800 | [diff] [blame] | 1344 | int priority; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1345 | }; |
| 1346 | |
| 1347 | extern void xfrm_init(void); |
Neil Horman | a33bc5c | 2009-07-30 18:52:15 -0700 | [diff] [blame] | 1348 | extern void xfrm4_init(int rt_hash_size); |
Alexey Dobriyan | d62ddc2 | 2008-11-25 17:14:31 -0800 | [diff] [blame] | 1349 | extern int xfrm_state_init(struct net *net); |
| 1350 | extern void xfrm_state_fini(struct net *net); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1351 | extern void xfrm4_state_init(void); |
Daniel Lezcano | c35b7e7 | 2007-12-08 00:14:11 -0800 | [diff] [blame] | 1352 | #ifdef CONFIG_XFRM |
| 1353 | extern int xfrm6_init(void); |
| 1354 | extern void xfrm6_fini(void); |
Daniel Lezcano | 0013cab | 2007-12-07 00:42:11 -0800 | [diff] [blame] | 1355 | extern int xfrm6_state_init(void); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1356 | extern void xfrm6_state_fini(void); |
Daniel Lezcano | c35b7e7 | 2007-12-08 00:14:11 -0800 | [diff] [blame] | 1357 | #else |
| 1358 | static inline int xfrm6_init(void) |
| 1359 | { |
| 1360 | return 0; |
| 1361 | } |
| 1362 | static inline void xfrm6_fini(void) |
| 1363 | { |
| 1364 | ; |
| 1365 | } |
| 1366 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1367 | |
Masahide NAKAMURA | 558f82e | 2007-12-20 20:42:57 -0800 | [diff] [blame] | 1368 | #ifdef CONFIG_XFRM_STATISTICS |
Alexey Dobriyan | c68cd1a | 2008-11-25 18:00:14 -0800 | [diff] [blame] | 1369 | extern int xfrm_proc_init(struct net *net); |
| 1370 | extern void xfrm_proc_fini(struct net *net); |
Masahide NAKAMURA | 558f82e | 2007-12-20 20:42:57 -0800 | [diff] [blame] | 1371 | #endif |
| 1372 | |
Alexey Dobriyan | b27aead | 2008-11-25 18:00:48 -0800 | [diff] [blame] | 1373 | extern int xfrm_sysctl_init(struct net *net); |
| 1374 | #ifdef CONFIG_SYSCTL |
| 1375 | extern void xfrm_sysctl_fini(struct net *net); |
| 1376 | #else |
| 1377 | static inline void xfrm_sysctl_fini(struct net *net) |
| 1378 | { |
| 1379 | } |
| 1380 | #endif |
| 1381 | |
Herbert Xu | 5c18245 | 2008-09-22 19:48:19 -0700 | [diff] [blame] | 1382 | 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] | 1383 | 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] | 1384 | int (*func)(struct xfrm_state *, int, void*), void *); |
Herbert Xu | abb81c4 | 2008-09-09 19:58:29 -0700 | [diff] [blame] | 1385 | extern void xfrm_state_walk_done(struct xfrm_state_walk *walk); |
Alexey Dobriyan | 673c09b | 2008-11-25 17:15:16 -0800 | [diff] [blame] | 1386 | extern struct xfrm_state *xfrm_state_alloc(struct net *net); |
David S. Miller | 33765d0 | 2011-02-24 01:55:45 -0500 | [diff] [blame] | 1387 | extern struct xfrm_state *xfrm_state_find(const xfrm_address_t *daddr, |
| 1388 | const xfrm_address_t *saddr, |
David S. Miller | b520e9f | 2011-02-22 18:24:19 -0800 | [diff] [blame] | 1389 | const struct flowi *fl, |
| 1390 | struct xfrm_tmpl *tmpl, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1391 | struct xfrm_policy *pol, int *err, |
| 1392 | unsigned short family); |
Jamal Hadi Salim | bd55775 | 2010-02-22 16:20:22 -0800 | [diff] [blame] | 1393 | extern struct xfrm_state *xfrm_stateonly_find(struct net *net, u32 mark, |
Alexey Dobriyan | 5447c5e | 2008-11-25 17:31:51 -0800 | [diff] [blame] | 1394 | xfrm_address_t *daddr, |
Jamal Hadi Salim | 628529b | 2007-07-02 22:41:14 -0700 | [diff] [blame] | 1395 | xfrm_address_t *saddr, |
| 1396 | unsigned short family, |
| 1397 | u8 mode, u8 proto, u32 reqid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1398 | extern int xfrm_state_check_expire(struct xfrm_state *x); |
| 1399 | extern void xfrm_state_insert(struct xfrm_state *x); |
| 1400 | extern int xfrm_state_add(struct xfrm_state *x); |
| 1401 | extern int xfrm_state_update(struct xfrm_state *x); |
Jamal Hadi Salim | bd55775 | 2010-02-22 16:20:22 -0800 | [diff] [blame] | 1402 | extern struct xfrm_state *xfrm_state_lookup(struct net *net, u32 mark, |
David S. Miller | a70486f | 2011-02-27 23:17:24 -0800 | [diff] [blame] | 1403 | const xfrm_address_t *daddr, __be32 spi, |
Jamal Hadi Salim | bd55775 | 2010-02-22 16:20:22 -0800 | [diff] [blame] | 1404 | u8 proto, unsigned short family); |
| 1405 | extern struct xfrm_state *xfrm_state_lookup_byaddr(struct net *net, u32 mark, |
David S. Miller | a70486f | 2011-02-27 23:17:24 -0800 | [diff] [blame] | 1406 | const xfrm_address_t *daddr, |
| 1407 | const xfrm_address_t *saddr, |
Jamal Hadi Salim | bd55775 | 2010-02-22 16:20:22 -0800 | [diff] [blame] | 1408 | u8 proto, |
| 1409 | unsigned short family); |
Masahide NAKAMURA | 41a49cc | 2006-08-23 22:48:31 -0700 | [diff] [blame] | 1410 | #ifdef CONFIG_XFRM_SUB_POLICY |
| 1411 | extern int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, |
| 1412 | int n, unsigned short family); |
| 1413 | extern int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, |
| 1414 | int n, unsigned short family); |
| 1415 | #else |
| 1416 | static inline int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, |
| 1417 | int n, unsigned short family) |
| 1418 | { |
| 1419 | return -ENOSYS; |
| 1420 | } |
| 1421 | |
| 1422 | static inline int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, |
| 1423 | int n, unsigned short family) |
| 1424 | { |
| 1425 | return -ENOSYS; |
| 1426 | } |
| 1427 | #endif |
Jamal Hadi Salim | af11e31 | 2007-05-04 12:55:13 -0700 | [diff] [blame] | 1428 | |
| 1429 | struct xfrmk_sadinfo { |
| 1430 | u32 sadhcnt; /* current hash bkts */ |
| 1431 | u32 sadhmcnt; /* max allowed hash bkts */ |
| 1432 | u32 sadcnt; /* current running count */ |
| 1433 | }; |
| 1434 | |
Jamal Hadi Salim | 5a6d341 | 2007-05-04 12:55:39 -0700 | [diff] [blame] | 1435 | struct xfrmk_spdinfo { |
| 1436 | u32 incnt; |
| 1437 | u32 outcnt; |
| 1438 | u32 fwdcnt; |
| 1439 | u32 inscnt; |
| 1440 | u32 outscnt; |
| 1441 | u32 fwdscnt; |
| 1442 | u32 spdhcnt; |
| 1443 | u32 spdhmcnt; |
| 1444 | }; |
| 1445 | |
Jamal Hadi Salim | bd55775 | 2010-02-22 16:20:22 -0800 | [diff] [blame] | 1446 | extern struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, |
| 1447 | u32 seq); |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 1448 | extern int xfrm_state_delete(struct xfrm_state *x); |
Alexey Dobriyan | 0e60245 | 2008-11-25 17:30:18 -0800 | [diff] [blame] | 1449 | 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] | 1450 | extern void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si); |
| 1451 | extern void xfrm_spd_getinfo(struct net *net, struct xfrmk_spdinfo *si); |
Steffen Klassert | 2cd0846 | 2011-03-08 00:09:51 +0000 | [diff] [blame] | 1452 | extern u32 xfrm_replay_seqhi(struct xfrm_state *x, __be32 net_seq); |
Steffen Klassert | 9fdc488 | 2011-03-08 00:08:32 +0000 | [diff] [blame] | 1453 | extern int xfrm_init_replay(struct xfrm_state *x); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1454 | extern int xfrm_state_mtu(struct xfrm_state *x, int mtu); |
Wei Yongjun | a454f0c | 2011-03-21 18:08:28 -0700 | [diff] [blame] | 1455 | extern int __xfrm_init_state(struct xfrm_state *x, bool init_replay); |
Herbert Xu | 72cb696 | 2005-06-20 13:18:08 -0700 | [diff] [blame] | 1456 | extern int xfrm_init_state(struct xfrm_state *x); |
Herbert Xu | 227620e | 2007-11-13 21:41:28 -0800 | [diff] [blame] | 1457 | 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] | 1458 | extern int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, |
| 1459 | int encap_type); |
Herbert Xu | 1bf06cd | 2007-11-19 18:50:17 -0800 | [diff] [blame] | 1460 | extern int xfrm_input_resume(struct sk_buff *skb, int nexthdr); |
Herbert Xu | c6581a4 | 2007-11-13 21:43:43 -0800 | [diff] [blame] | 1461 | extern int xfrm_output_resume(struct sk_buff *skb, int err); |
Herbert Xu | 406ef77 | 2007-10-08 17:16:30 -0700 | [diff] [blame] | 1462 | extern int xfrm_output(struct sk_buff *skb); |
Kazunori MIYAZAWA | df9dcb4 | 2008-03-24 14:51:51 -0700 | [diff] [blame] | 1463 | 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] | 1464 | extern int xfrm4_extract_header(struct sk_buff *skb); |
Herbert Xu | 227620e | 2007-11-13 21:41:28 -0800 | [diff] [blame] | 1465 | 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] | 1466 | extern int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi, |
| 1467 | int encap_type); |
Herbert Xu | 716062f | 2007-11-13 21:44:23 -0800 | [diff] [blame] | 1468 | extern int xfrm4_transport_finish(struct sk_buff *skb, int async); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1469 | extern int xfrm4_rcv(struct sk_buff *skb); |
Herbert Xu | c4541b4 | 2007-10-17 21:28:53 -0700 | [diff] [blame] | 1470 | |
| 1471 | static inline int xfrm4_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi) |
| 1472 | { |
| 1473 | return xfrm4_rcv_encap(skb, nexthdr, spi, 0); |
| 1474 | } |
| 1475 | |
Herbert Xu | 36cf9ac | 2007-11-13 21:40:52 -0800 | [diff] [blame] | 1476 | extern int xfrm4_extract_output(struct xfrm_state *x, struct sk_buff *skb); |
| 1477 | 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] | 1478 | extern int xfrm4_output(struct sk_buff *skb); |
Steffen Klassert | 43a4dea | 2011-05-09 19:36:38 +0000 | [diff] [blame] | 1479 | extern int xfrm4_output_finish(struct sk_buff *skb); |
Kazunori MIYAZAWA | c0d5640 | 2007-02-13 12:54:47 -0800 | [diff] [blame] | 1480 | extern int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family); |
| 1481 | extern int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family); |
Saurabh | eb8637c | 2012-07-17 09:44:49 +0000 | [diff] [blame] | 1482 | extern int xfrm4_mode_tunnel_input_register(struct xfrm_tunnel *handler); |
| 1483 | extern int xfrm4_mode_tunnel_input_deregister(struct xfrm_tunnel *handler); |
Herbert Xu | 36cf9ac | 2007-11-13 21:40:52 -0800 | [diff] [blame] | 1484 | extern int xfrm6_extract_header(struct sk_buff *skb); |
Herbert Xu | 227620e | 2007-11-13 21:41:28 -0800 | [diff] [blame] | 1485 | 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] | 1486 | 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] | 1487 | extern int xfrm6_transport_finish(struct sk_buff *skb, int async); |
Herbert Xu | e5bbef2 | 2007-10-15 12:50:28 -0700 | [diff] [blame] | 1488 | extern int xfrm6_rcv(struct sk_buff *skb); |
Masahide NAKAMURA | fbd9a5b | 2006-08-23 18:08:21 -0700 | [diff] [blame] | 1489 | extern int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr, |
| 1490 | xfrm_address_t *saddr, u8 proto); |
Kazunori MIYAZAWA | 73d605d | 2007-02-13 12:55:55 -0800 | [diff] [blame] | 1491 | extern int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family); |
| 1492 | extern int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family); |
Alexey Dobriyan | a166477 | 2010-01-25 10:37:54 +0000 | [diff] [blame] | 1493 | extern __be32 xfrm6_tunnel_alloc_spi(struct net *net, xfrm_address_t *saddr); |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 1494 | extern __be32 xfrm6_tunnel_spi_lookup(struct net *net, const xfrm_address_t *saddr); |
Herbert Xu | 36cf9ac | 2007-11-13 21:40:52 -0800 | [diff] [blame] | 1495 | extern int xfrm6_extract_output(struct xfrm_state *x, struct sk_buff *skb); |
| 1496 | 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] | 1497 | extern int xfrm6_output(struct sk_buff *skb); |
Steffen Klassert | 43a4dea | 2011-05-09 19:36:38 +0000 | [diff] [blame] | 1498 | extern int xfrm6_output_finish(struct sk_buff *skb); |
Masahide NAKAMURA | aee5adb | 2006-08-23 17:57:28 -0700 | [diff] [blame] | 1499 | extern int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb, |
| 1500 | u8 **prevhdr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1501 | |
| 1502 | #ifdef CONFIG_XFRM |
James Chapman | 067b207 | 2007-07-05 17:08:05 -0700 | [diff] [blame] | 1503 | 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] | 1504 | 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] | 1505 | #else |
| 1506 | static inline int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen) |
| 1507 | { |
| 1508 | return -ENOPROTOOPT; |
| 1509 | } |
| 1510 | |
James Chapman | 067b207 | 2007-07-05 17:08:05 -0700 | [diff] [blame] | 1511 | 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] | 1512 | { |
| 1513 | /* should not happen */ |
| 1514 | kfree_skb(skb); |
| 1515 | return 0; |
| 1516 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1517 | #endif |
| 1518 | |
Alexey Dobriyan | 0331b1f | 2008-11-25 17:21:45 -0800 | [diff] [blame] | 1519 | struct xfrm_policy *xfrm_policy_alloc(struct net *net, gfp_t gfp); |
Timo Teras | 4c563f7 | 2008-02-28 21:31:08 -0800 | [diff] [blame] | 1520 | |
Herbert Xu | 12a169e | 2008-10-01 07:03:24 -0700 | [diff] [blame] | 1521 | 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] | 1522 | 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] | 1523 | int (*func)(struct xfrm_policy *, int, int, void*), void *); |
Herbert Xu | 12a169e | 2008-10-01 07:03:24 -0700 | [diff] [blame] | 1524 | extern void xfrm_policy_walk_done(struct xfrm_policy_walk *walk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1525 | 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] | 1526 | struct xfrm_policy *xfrm_policy_bysel_ctx(struct net *net, u32 mark, |
| 1527 | u8 type, int dir, |
Masahide NAKAMURA | 4e81bb8 | 2006-08-23 22:43:30 -0700 | [diff] [blame] | 1528 | struct xfrm_selector *sel, |
Eric Paris | ef41aaa | 2007-03-07 15:37:58 -0800 | [diff] [blame] | 1529 | struct xfrm_sec_ctx *ctx, int delete, |
| 1530 | int *err); |
Jamal Hadi Salim | 8ca2e93 | 2010-02-22 11:32:57 +0000 | [diff] [blame] | 1531 | 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] | 1532 | 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] | 1533 | u32 xfrm_get_acqseq(void); |
Herbert Xu | 658b219 | 2007-10-09 13:29:52 -0700 | [diff] [blame] | 1534 | 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] | 1535 | struct xfrm_state *xfrm_find_acq(struct net *net, struct xfrm_mark *mark, |
| 1536 | u8 mode, u32 reqid, u8 proto, |
David S. Miller | a70486f | 2011-02-27 23:17:24 -0800 | [diff] [blame] | 1537 | const xfrm_address_t *daddr, |
| 1538 | const xfrm_address_t *saddr, int create, |
Jamal Hadi Salim | bd55775 | 2010-02-22 16:20:22 -0800 | [diff] [blame] | 1539 | unsigned short family); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1540 | extern int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1541 | |
Shinta Sugimoto | 80c9aba | 2007-02-08 13:11:42 -0800 | [diff] [blame] | 1542 | #ifdef CONFIG_XFRM_MIGRATE |
David S. Miller | 183cad1 | 2011-02-24 00:28:01 -0500 | [diff] [blame] | 1543 | extern int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, |
| 1544 | const struct xfrm_migrate *m, int num_bundles, |
| 1545 | const struct xfrm_kmaddress *k); |
Shinta Sugimoto | 80c9aba | 2007-02-08 13:11:42 -0800 | [diff] [blame] | 1546 | extern struct xfrm_state * xfrm_migrate_state_find(struct xfrm_migrate *m); |
| 1547 | extern struct xfrm_state * xfrm_state_migrate(struct xfrm_state *x, |
| 1548 | struct xfrm_migrate *m); |
David S. Miller | b4b7c0b | 2011-02-24 00:35:06 -0500 | [diff] [blame] | 1549 | extern int xfrm_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, |
Arnaud Ebalard | 13c1d18 | 2008-10-05 13:33:42 -0700 | [diff] [blame] | 1550 | struct xfrm_migrate *m, int num_bundles, |
| 1551 | struct xfrm_kmaddress *k); |
Shinta Sugimoto | 80c9aba | 2007-02-08 13:11:42 -0800 | [diff] [blame] | 1552 | #endif |
| 1553 | |
Al Viro | 5d36b18 | 2006-11-08 00:24:06 -0800 | [diff] [blame] | 1554 | 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] | 1555 | 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] | 1556 | 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] | 1557 | |
| 1558 | extern void xfrm_input_init(void); |
Al Viro | 6067b2b | 2006-09-27 18:47:59 -0700 | [diff] [blame] | 1559 | 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] | 1560 | |
| 1561 | extern void xfrm_probe_algs(void); |
| 1562 | extern int xfrm_count_auth_supported(void); |
| 1563 | extern int xfrm_count_enc_supported(void); |
| 1564 | extern struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx); |
| 1565 | extern struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx); |
| 1566 | extern struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id); |
| 1567 | extern struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id); |
| 1568 | extern struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id); |
David S. Miller | 6f2f19e | 2011-02-27 23:04:45 -0800 | [diff] [blame] | 1569 | extern struct xfrm_algo_desc *xfrm_aalg_get_byname(const char *name, int probe); |
| 1570 | extern struct xfrm_algo_desc *xfrm_ealg_get_byname(const char *name, int probe); |
| 1571 | extern struct xfrm_algo_desc *xfrm_calg_get_byname(const char *name, int probe); |
| 1572 | extern struct xfrm_algo_desc *xfrm_aead_get_byname(const char *name, int icv_len, |
Herbert Xu | 1a6509d | 2008-01-28 19:37:29 -0800 | [diff] [blame] | 1573 | int probe); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1574 | |
David S. Miller | ff6acd1 | 2011-02-24 00:19:13 -0500 | [diff] [blame] | 1575 | static inline int xfrm_addr_cmp(const xfrm_address_t *a, |
| 1576 | const xfrm_address_t *b, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1577 | int family) |
| 1578 | { |
| 1579 | switch (family) { |
| 1580 | default: |
| 1581 | case AF_INET: |
jamal | a633746 | 2010-02-09 13:21:17 +0000 | [diff] [blame] | 1582 | return (__force u32)a->a4 - (__force u32)b->a4; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1583 | case AF_INET6: |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 1584 | return ipv6_addr_cmp((const struct in6_addr *)a, |
| 1585 | (const struct in6_addr *)b); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1586 | } |
| 1587 | } |
| 1588 | |
Herbert Xu | 77d8d7a | 2005-10-05 12:15:12 -0700 | [diff] [blame] | 1589 | static inline int xfrm_policy_id2dir(u32 index) |
| 1590 | { |
| 1591 | return index & 7; |
| 1592 | } |
| 1593 | |
Alexey Dobriyan | a6483b7 | 2008-11-25 17:38:20 -0800 | [diff] [blame] | 1594 | #ifdef CONFIG_XFRM |
| 1595 | static inline int xfrm_aevent_is_on(struct net *net) |
Jamal Hadi Salim | f8cd548 | 2006-03-20 19:15:11 -0800 | [diff] [blame] | 1596 | { |
Patrick McHardy | be33690 | 2006-03-20 22:40:54 -0800 | [diff] [blame] | 1597 | struct sock *nlsk; |
| 1598 | int ret = 0; |
| 1599 | |
| 1600 | rcu_read_lock(); |
Alexey Dobriyan | a6483b7 | 2008-11-25 17:38:20 -0800 | [diff] [blame] | 1601 | nlsk = rcu_dereference(net->xfrm.nlsk); |
Patrick McHardy | be33690 | 2006-03-20 22:40:54 -0800 | [diff] [blame] | 1602 | if (nlsk) |
| 1603 | ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS); |
| 1604 | rcu_read_unlock(); |
| 1605 | return ret; |
Jamal Hadi Salim | f8cd548 | 2006-03-20 19:15:11 -0800 | [diff] [blame] | 1606 | } |
Alexey Dobriyan | a6483b7 | 2008-11-25 17:38:20 -0800 | [diff] [blame] | 1607 | #endif |
Jamal Hadi Salim | f8cd548 | 2006-03-20 19:15:11 -0800 | [diff] [blame] | 1608 | |
David S. Miller | 8515862 | 2011-02-27 23:07:02 -0800 | [diff] [blame] | 1609 | static inline int xfrm_alg_len(const struct xfrm_algo *alg) |
Eric Dumazet | 0f99be0 | 2008-01-08 23:39:06 -0800 | [diff] [blame] | 1610 | { |
| 1611 | return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); |
| 1612 | } |
| 1613 | |
David S. Miller | 8515862 | 2011-02-27 23:07:02 -0800 | [diff] [blame] | 1614 | static inline int xfrm_alg_auth_len(const struct xfrm_algo_auth *alg) |
Martin Willi | 4447bb3 | 2009-11-25 00:29:52 +0000 | [diff] [blame] | 1615 | { |
| 1616 | return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); |
| 1617 | } |
| 1618 | |
Steffen Klassert | 9736acf | 2011-03-08 00:05:43 +0000 | [diff] [blame] | 1619 | static inline int xfrm_replay_state_esn_len(struct xfrm_replay_state_esn *replay_esn) |
| 1620 | { |
| 1621 | return sizeof(*replay_esn) + replay_esn->bmp_len * sizeof(__u32); |
| 1622 | } |
| 1623 | |
Shinta Sugimoto | 80c9aba | 2007-02-08 13:11:42 -0800 | [diff] [blame] | 1624 | #ifdef CONFIG_XFRM_MIGRATE |
Steffen Klassert | af2f464 | 2011-03-28 19:46:39 +0000 | [diff] [blame] | 1625 | static inline int xfrm_replay_clone(struct xfrm_state *x, |
| 1626 | struct xfrm_state *orig) |
| 1627 | { |
| 1628 | x->replay_esn = kzalloc(xfrm_replay_state_esn_len(orig->replay_esn), |
| 1629 | GFP_KERNEL); |
| 1630 | if (!x->replay_esn) |
| 1631 | return -ENOMEM; |
| 1632 | |
| 1633 | x->replay_esn->bmp_len = orig->replay_esn->bmp_len; |
| 1634 | x->replay_esn->replay_window = orig->replay_esn->replay_window; |
| 1635 | |
| 1636 | x->preplay_esn = kmemdup(x->replay_esn, |
| 1637 | xfrm_replay_state_esn_len(x->replay_esn), |
| 1638 | GFP_KERNEL); |
| 1639 | if (!x->preplay_esn) { |
| 1640 | kfree(x->replay_esn); |
| 1641 | return -ENOMEM; |
| 1642 | } |
| 1643 | |
| 1644 | return 0; |
| 1645 | } |
| 1646 | |
Shinta Sugimoto | 80c9aba | 2007-02-08 13:11:42 -0800 | [diff] [blame] | 1647 | static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig) |
| 1648 | { |
Eric Dumazet | 0f99be0 | 2008-01-08 23:39:06 -0800 | [diff] [blame] | 1649 | return kmemdup(orig, xfrm_alg_len(orig), GFP_KERNEL); |
Shinta Sugimoto | 80c9aba | 2007-02-08 13:11:42 -0800 | [diff] [blame] | 1650 | } |
| 1651 | |
Martin Willi | 4447bb3 | 2009-11-25 00:29:52 +0000 | [diff] [blame] | 1652 | static inline struct xfrm_algo_auth *xfrm_algo_auth_clone(struct xfrm_algo_auth *orig) |
| 1653 | { |
| 1654 | return kmemdup(orig, xfrm_alg_auth_len(orig), GFP_KERNEL); |
| 1655 | } |
| 1656 | |
Shinta Sugimoto | 80c9aba | 2007-02-08 13:11:42 -0800 | [diff] [blame] | 1657 | static inline void xfrm_states_put(struct xfrm_state **states, int n) |
| 1658 | { |
| 1659 | int i; |
| 1660 | for (i = 0; i < n; i++) |
| 1661 | xfrm_state_put(*(states + i)); |
| 1662 | } |
| 1663 | |
| 1664 | static inline void xfrm_states_delete(struct xfrm_state **states, int n) |
| 1665 | { |
| 1666 | int i; |
| 1667 | for (i = 0; i < n; i++) |
| 1668 | xfrm_state_delete(*(states + i)); |
| 1669 | } |
| 1670 | #endif |
Jamal Hadi Salim | f8cd548 | 2006-03-20 19:15:11 -0800 | [diff] [blame] | 1671 | |
Alexey Dobriyan | def8b4f | 2008-10-28 13:24:06 -0700 | [diff] [blame] | 1672 | #ifdef CONFIG_XFRM |
Herbert Xu | 0050112 | 2007-12-11 01:53:43 -0800 | [diff] [blame] | 1673 | static inline struct xfrm_state *xfrm_input_state(struct sk_buff *skb) |
| 1674 | { |
| 1675 | return skb->sp->xvec[skb->sp->len - 1]; |
| 1676 | } |
Alexey Dobriyan | def8b4f | 2008-10-28 13:24:06 -0700 | [diff] [blame] | 1677 | #endif |
Herbert Xu | 0050112 | 2007-12-11 01:53:43 -0800 | [diff] [blame] | 1678 | |
Jamal Hadi Salim | bf825f81 | 2010-02-22 11:32:54 +0000 | [diff] [blame] | 1679 | static inline int xfrm_mark_get(struct nlattr **attrs, struct xfrm_mark *m) |
| 1680 | { |
| 1681 | if (attrs[XFRMA_MARK]) |
Andreas Steffen | 4efd7e8 | 2010-06-30 10:41:15 -0700 | [diff] [blame] | 1682 | memcpy(m, nla_data(attrs[XFRMA_MARK]), sizeof(struct xfrm_mark)); |
Jamal Hadi Salim | bf825f81 | 2010-02-22 11:32:54 +0000 | [diff] [blame] | 1683 | else |
| 1684 | m->v = m->m = 0; |
| 1685 | |
| 1686 | return m->v & m->m; |
| 1687 | } |
| 1688 | |
David S. Miller | e3dfa38 | 2011-02-27 23:20:19 -0800 | [diff] [blame] | 1689 | static inline int xfrm_mark_put(struct sk_buff *skb, const struct xfrm_mark *m) |
Jamal Hadi Salim | bf825f81 | 2010-02-22 11:32:54 +0000 | [diff] [blame] | 1690 | { |
David S. Miller | 1d1e34d | 2012-06-27 21:57:03 -0700 | [diff] [blame] | 1691 | int ret = 0; |
Jamal Hadi Salim | bf825f81 | 2010-02-22 11:32:54 +0000 | [diff] [blame] | 1692 | |
David S. Miller | 1d1e34d | 2012-06-27 21:57:03 -0700 | [diff] [blame] | 1693 | if (m->m | m->v) |
| 1694 | ret = nla_put(skb, XFRMA_MARK, sizeof(struct xfrm_mark), m); |
| 1695 | return ret; |
Jamal Hadi Salim | bf825f81 | 2010-02-22 11:32:54 +0000 | [diff] [blame] | 1696 | } |
| 1697 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1698 | #endif /* _NET_XFRM_H */ |