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) |
Masahide NAKAMURA | 558f82e | 2007-12-20 20:42:57 -0800 | [diff] [blame] | 48 | #else |
Alexey Dobriyan | 59c9940 | 2008-11-25 17:59:52 -0800 | [diff] [blame] | 49 | #define XFRM_INC_STATS(net, field) ((void)(net)) |
Masahide NAKAMURA | 558f82e | 2007-12-20 20:42:57 -0800 | [diff] [blame] | 50 | #endif |
| 51 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | |
| 53 | /* Organization of SPD aka "XFRM rules" |
| 54 | ------------------------------------ |
| 55 | |
| 56 | Basic objects: |
| 57 | - policy rule, struct xfrm_policy (=SPD entry) |
| 58 | - bundle of transformations, struct dst_entry == struct xfrm_dst (=SA bundle) |
| 59 | - instance of a transformer, struct xfrm_state (=SA) |
| 60 | - template to clone xfrm_state, struct xfrm_tmpl |
| 61 | |
| 62 | SPD is plain linear list of xfrm_policy rules, ordered by priority. |
| 63 | (To be compatible with existing pfkeyv2 implementations, |
| 64 | many rules with priority of 0x7fffffff are allowed to exist and |
| 65 | such rules are ordered in an unpredictable way, thanks to bsd folks.) |
| 66 | |
| 67 | Lookup is plain linear search until the first match with selector. |
| 68 | |
| 69 | If "action" is "block", then we prohibit the flow, otherwise: |
| 70 | if "xfrms_nr" is zero, the flow passes untransformed. Otherwise, |
| 71 | policy entry has list of up to XFRM_MAX_DEPTH transformations, |
| 72 | described by templates xfrm_tmpl. Each template is resolved |
| 73 | to a complete xfrm_state (see below) and we pack bundle of transformations |
| 74 | to a dst_entry returned to requestor. |
| 75 | |
| 76 | dst -. xfrm .-> xfrm_state #1 |
| 77 | |---. child .-> dst -. xfrm .-> xfrm_state #2 |
| 78 | |---. child .-> dst -. xfrm .-> xfrm_state #3 |
| 79 | |---. child .-> NULL |
| 80 | |
| 81 | Bundles are cached at xrfm_policy struct (field ->bundles). |
| 82 | |
| 83 | |
| 84 | Resolution of xrfm_tmpl |
| 85 | ----------------------- |
| 86 | Template contains: |
| 87 | 1. ->mode Mode: transport or tunnel |
| 88 | 2. ->id.proto Protocol: AH/ESP/IPCOMP |
| 89 | 3. ->id.daddr Remote tunnel endpoint, ignored for transport mode. |
| 90 | Q: allow to resolve security gateway? |
| 91 | 4. ->id.spi If not zero, static SPI. |
| 92 | 5. ->saddr Local tunnel endpoint, ignored for transport mode. |
| 93 | 6. ->algos List of allowed algos. Plain bitmask now. |
| 94 | Q: ealgos, aalgos, calgos. What a mess... |
| 95 | 7. ->share Sharing mode. |
| 96 | Q: how to implement private sharing mode? To add struct sock* to |
| 97 | flow id? |
| 98 | |
| 99 | Having this template we search through SAD searching for entries |
| 100 | with appropriate mode/proto/algo, permitted by selector. |
| 101 | If no appropriate entry found, it is requested from key manager. |
| 102 | |
| 103 | PROBLEMS: |
| 104 | Q: How to find all the bundles referring to a physical path for |
| 105 | PMTU discovery? Seems, dst should contain list of all parents... |
| 106 | and enter to infinite locking hierarchy disaster. |
| 107 | No! It is easier, we will not search for them, let them find us. |
| 108 | We add genid to each dst plus pointer to genid of raw IP route, |
| 109 | pmtu disc will update pmtu on raw IP route and increase its genid. |
| 110 | dst_check() will see this for top level and trigger resyncing |
| 111 | metrics. Plus, it will be made via sk->sk_dst_cache. Solved. |
| 112 | */ |
| 113 | |
Herbert Xu | 12a169e | 2008-10-01 07:03:24 -0700 | [diff] [blame] | 114 | struct xfrm_state_walk { |
| 115 | struct list_head all; |
| 116 | u8 state; |
Nicolas Dichtel | d362309 | 2014-02-14 15:30:36 +0100 | [diff] [blame] | 117 | u8 dying; |
| 118 | u8 proto; |
Herbert Xu | 12a169e | 2008-10-01 07:03:24 -0700 | [diff] [blame] | 119 | u32 seq; |
Nicolas Dichtel | 870a2df | 2014-03-06 18:24:29 +0100 | [diff] [blame] | 120 | struct xfrm_address_filter *filter; |
Herbert Xu | 12a169e | 2008-10-01 07:03:24 -0700 | [diff] [blame] | 121 | }; |
| 122 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 123 | /* Full description of state of transformer. */ |
Eric Dumazet | fd2c3ef | 2009-11-03 03:26:03 +0000 | [diff] [blame] | 124 | struct xfrm_state { |
Eric W. Biederman | 0c5c9fb | 2015-03-11 23:06:44 -0500 | [diff] [blame] | 125 | possible_net_t xs_net; |
Herbert Xu | abb81c4 | 2008-09-09 19:58:29 -0700 | [diff] [blame] | 126 | union { |
Herbert Xu | 12a169e | 2008-10-01 07:03:24 -0700 | [diff] [blame] | 127 | struct hlist_node gclist; |
Herbert Xu | abb81c4 | 2008-09-09 19:58:29 -0700 | [diff] [blame] | 128 | struct hlist_node bydst; |
| 129 | }; |
David S. Miller | 8f126e3 | 2006-08-24 02:45:07 -0700 | [diff] [blame] | 130 | struct hlist_node bysrc; |
| 131 | struct hlist_node byspi; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 132 | |
| 133 | atomic_t refcnt; |
| 134 | spinlock_t lock; |
| 135 | |
| 136 | struct xfrm_id id; |
| 137 | struct xfrm_selector sel; |
Jamal Hadi Salim | bf825f81 | 2010-02-22 11:32:54 +0000 | [diff] [blame] | 138 | struct xfrm_mark mark; |
Martin Willi | 35d2856 | 2010-12-08 04:37:49 +0000 | [diff] [blame] | 139 | u32 tfcpad; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 140 | |
David S. Miller | 9d4a706 | 2006-08-24 03:18:09 -0700 | [diff] [blame] | 141 | u32 genid; |
| 142 | |
Herbert Xu | 12a169e | 2008-10-01 07:03:24 -0700 | [diff] [blame] | 143 | /* Key manager bits */ |
| 144 | struct xfrm_state_walk km; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 145 | |
| 146 | /* Parameters of this state. */ |
| 147 | struct { |
| 148 | u32 reqid; |
| 149 | u8 mode; |
| 150 | u8 replay_window; |
| 151 | u8 aalgo, ealgo, calgo; |
| 152 | u8 flags; |
| 153 | u16 family; |
| 154 | xfrm_address_t saddr; |
| 155 | int header_len; |
| 156 | int trailer_len; |
Nicolas Dichtel | a947b0a | 2013-02-22 10:54:54 +0100 | [diff] [blame] | 157 | u32 extra_flags; |
Lorenzo Colitti | bf25c79 | 2017-08-11 02:11:33 +0900 | [diff] [blame] | 158 | u32 output_mark; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 159 | } props; |
| 160 | |
| 161 | struct xfrm_lifetime_cfg lft; |
| 162 | |
| 163 | /* Data for transformer */ |
Martin Willi | 4447bb3 | 2009-11-25 00:29:52 +0000 | [diff] [blame] | 164 | struct xfrm_algo_auth *aalg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 165 | struct xfrm_algo *ealg; |
| 166 | struct xfrm_algo *calg; |
Herbert Xu | 1a6509d | 2008-01-28 19:37:29 -0800 | [diff] [blame] | 167 | struct xfrm_algo_aead *aead; |
Herbert Xu | 69b0137 | 2015-05-27 16:03:45 +0800 | [diff] [blame] | 168 | const char *geniv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 169 | |
| 170 | /* Data for encapsulator */ |
| 171 | struct xfrm_encap_tmpl *encap; |
| 172 | |
Noriaki TAKAMIYA | 060f02a | 2006-08-23 18:18:55 -0700 | [diff] [blame] | 173 | /* Data for care-of address */ |
| 174 | xfrm_address_t *coaddr; |
| 175 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 176 | /* IPComp needs an IPIP tunnel for handling uncompressed packets */ |
| 177 | struct xfrm_state *tunnel; |
| 178 | |
| 179 | /* If a tunnel, number of users + 1 */ |
| 180 | atomic_t tunnel_users; |
| 181 | |
| 182 | /* State for replay detection */ |
| 183 | struct xfrm_replay_state replay; |
Steffen Klassert | 9736acf | 2011-03-08 00:05:43 +0000 | [diff] [blame] | 184 | struct xfrm_replay_state_esn *replay_esn; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 185 | |
Jamal Hadi Salim | f8cd548 | 2006-03-20 19:15:11 -0800 | [diff] [blame] | 186 | /* Replay detection state at the time we sent the last notification */ |
| 187 | struct xfrm_replay_state preplay; |
Steffen Klassert | 9736acf | 2011-03-08 00:05:43 +0000 | [diff] [blame] | 188 | struct xfrm_replay_state_esn *preplay_esn; |
Jamal Hadi Salim | f8cd548 | 2006-03-20 19:15:11 -0800 | [diff] [blame] | 189 | |
Steffen Klassert | 9fdc488 | 2011-03-08 00:08:32 +0000 | [diff] [blame] | 190 | /* The functions for replay detection. */ |
Julia Lawall | e45a8a9 | 2016-08-09 18:27:08 +0200 | [diff] [blame] | 191 | const struct xfrm_replay *repl; |
Steffen Klassert | 9fdc488 | 2011-03-08 00:08:32 +0000 | [diff] [blame] | 192 | |
Jamal Hadi Salim | 2717096 | 2006-04-14 15:03:05 -0700 | [diff] [blame] | 193 | /* internal flag that only holds state for delayed aevent at the |
| 194 | * moment |
| 195 | */ |
| 196 | u32 xflags; |
| 197 | |
Jamal Hadi Salim | f8cd548 | 2006-03-20 19:15:11 -0800 | [diff] [blame] | 198 | /* Replay detection notification settings */ |
| 199 | u32 replay_maxage; |
| 200 | u32 replay_maxdiff; |
| 201 | |
| 202 | /* Replay detection notification timer */ |
| 203 | struct timer_list rtimer; |
| 204 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 205 | /* Statistics */ |
| 206 | struct xfrm_stats stats; |
| 207 | |
| 208 | struct xfrm_lifetime_cur curlft; |
Yury Polyanskiy | 9e0d57f | 2009-11-08 20:58:41 -0800 | [diff] [blame] | 209 | struct tasklet_hrtimer mtimer; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 210 | |
Fan Du | e3c0d04 | 2012-07-30 21:43:54 +0000 | [diff] [blame] | 211 | /* used to fix curlft->add_time when changing date */ |
| 212 | long saved_tmo; |
| 213 | |
Masahide NAKAMURA | 9afaca0 | 2006-08-23 18:20:16 -0700 | [diff] [blame] | 214 | /* Last used time */ |
Herbert Xu | d26f398 | 2007-11-13 21:47:08 -0800 | [diff] [blame] | 215 | unsigned long lastused; |
Masahide NAKAMURA | 9afaca0 | 2006-08-23 18:20:16 -0700 | [diff] [blame] | 216 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 217 | /* Reference to data common to all the instances of this |
| 218 | * transformer. */ |
Eric Dumazet | 533cb5b | 2008-01-30 19:11:50 -0800 | [diff] [blame] | 219 | const struct xfrm_type *type; |
Herbert Xu | 1399637 | 2007-10-17 21:35:51 -0700 | [diff] [blame] | 220 | struct xfrm_mode *inner_mode; |
Kazunori MIYAZAWA | df9dcb4 | 2008-03-24 14:51:51 -0700 | [diff] [blame] | 221 | struct xfrm_mode *inner_mode_iaf; |
Herbert Xu | 1399637 | 2007-10-17 21:35:51 -0700 | [diff] [blame] | 222 | struct xfrm_mode *outer_mode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 223 | |
Trent Jaeger | df71837 | 2005-12-13 23:12:27 -0800 | [diff] [blame] | 224 | /* Security context */ |
| 225 | struct xfrm_sec_ctx *security; |
| 226 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 227 | /* Private data of this transformer, format is opaque, |
| 228 | * interpreted by xfrm_type methods. */ |
| 229 | void *data; |
| 230 | }; |
| 231 | |
Alexey Dobriyan | 673c09b | 2008-11-25 17:15:16 -0800 | [diff] [blame] | 232 | static inline struct net *xs_net(struct xfrm_state *x) |
| 233 | { |
| 234 | return read_pnet(&x->xs_net); |
| 235 | } |
| 236 | |
Jamal Hadi Salim | 2717096 | 2006-04-14 15:03:05 -0700 | [diff] [blame] | 237 | /* xflags - make enum if more show up */ |
| 238 | #define XFRM_TIME_DEFER 1 |
Fan Du | e3c0d04 | 2012-07-30 21:43:54 +0000 | [diff] [blame] | 239 | #define XFRM_SOFT_EXPIRE 2 |
Jamal Hadi Salim | 2717096 | 2006-04-14 15:03:05 -0700 | [diff] [blame] | 240 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 241 | enum { |
| 242 | XFRM_STATE_VOID, |
| 243 | XFRM_STATE_ACQ, |
| 244 | XFRM_STATE_VALID, |
| 245 | XFRM_STATE_ERROR, |
| 246 | XFRM_STATE_EXPIRED, |
| 247 | XFRM_STATE_DEAD |
| 248 | }; |
| 249 | |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 250 | /* callback structure passed from either netlink or pfkey */ |
Eric Dumazet | fd2c3ef | 2009-11-03 03:26:03 +0000 | [diff] [blame] | 251 | struct km_event { |
Herbert Xu | bf08867 | 2005-06-18 22:44:00 -0700 | [diff] [blame] | 252 | union { |
| 253 | u32 hard; |
| 254 | u32 proto; |
| 255 | u32 byid; |
Jamal Hadi Salim | f8cd548 | 2006-03-20 19:15:11 -0800 | [diff] [blame] | 256 | u32 aevent; |
Masahide NAKAMURA | f7b6983 | 2006-08-23 22:49:28 -0700 | [diff] [blame] | 257 | u32 type; |
Herbert Xu | bf08867 | 2005-06-18 22:44:00 -0700 | [diff] [blame] | 258 | } data; |
| 259 | |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 260 | u32 seq; |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 261 | u32 portid; |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 262 | u32 event; |
Alexey Dobriyan | 7067802 | 2008-11-25 17:50:36 -0800 | [diff] [blame] | 263 | struct net *net; |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 264 | }; |
| 265 | |
Steffen Klassert | 9fdc488 | 2011-03-08 00:08:32 +0000 | [diff] [blame] | 266 | struct xfrm_replay { |
| 267 | void (*advance)(struct xfrm_state *x, __be32 net_seq); |
| 268 | int (*check)(struct xfrm_state *x, |
| 269 | struct sk_buff *skb, |
| 270 | __be32 net_seq); |
Steffen Klassert | 3b59df4 | 2012-09-04 00:03:29 +0000 | [diff] [blame] | 271 | int (*recheck)(struct xfrm_state *x, |
| 272 | struct sk_buff *skb, |
| 273 | __be32 net_seq); |
Steffen Klassert | 9fdc488 | 2011-03-08 00:08:32 +0000 | [diff] [blame] | 274 | void (*notify)(struct xfrm_state *x, int event); |
| 275 | int (*overflow)(struct xfrm_state *x, struct sk_buff *skb); |
| 276 | }; |
| 277 | |
Herbert Xu | 25ee328 | 2007-12-11 09:32:34 -0800 | [diff] [blame] | 278 | struct net_device; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 279 | struct xfrm_type; |
| 280 | struct xfrm_dst; |
| 281 | struct xfrm_policy_afinfo { |
| 282 | unsigned short family; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 283 | struct dst_ops *dst_ops; |
Alexey Dobriyan | ddcfd79 | 2008-11-25 17:37:23 -0800 | [diff] [blame] | 284 | void (*garbage_collect)(struct net *net); |
David Ahern | 42a7b32 | 2015-08-10 16:58:11 -0600 | [diff] [blame] | 285 | struct dst_entry *(*dst_lookup)(struct net *net, |
| 286 | int tos, int oif, |
David S. Miller | 5e6b930 | 2011-02-24 00:14:45 -0500 | [diff] [blame] | 287 | const xfrm_address_t *saddr, |
Lorenzo Colitti | bf25c79 | 2017-08-11 02:11:33 +0900 | [diff] [blame] | 288 | const xfrm_address_t *daddr, |
| 289 | u32 mark); |
David Ahern | 42a7b32 | 2015-08-10 16:58:11 -0600 | [diff] [blame] | 290 | int (*get_saddr)(struct net *net, int oif, |
| 291 | xfrm_address_t *saddr, |
Lorenzo Colitti | bf25c79 | 2017-08-11 02:11:33 +0900 | [diff] [blame] | 292 | xfrm_address_t *daddr, |
| 293 | u32 mark); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 294 | void (*decode_session)(struct sk_buff *skb, |
Herbert Xu | d5422ef | 2007-12-12 10:44:16 -0800 | [diff] [blame] | 295 | struct flowi *fl, |
| 296 | int reverse); |
David S. Miller | 05d8402 | 2011-02-22 17:47:10 -0800 | [diff] [blame] | 297 | int (*get_tos)(const struct flowi *fl); |
Masahide NAKAMURA | a1b0514 | 2007-12-20 20:41:12 -0800 | [diff] [blame] | 298 | int (*init_path)(struct xfrm_dst *path, |
| 299 | struct dst_entry *dst, |
| 300 | int nfheader_len); |
Herbert Xu | 25ee328 | 2007-12-11 09:32:34 -0800 | [diff] [blame] | 301 | int (*fill_dst)(struct xfrm_dst *xdst, |
Herbert Xu | 87c1e12 | 2010-03-02 02:51:56 +0000 | [diff] [blame] | 302 | struct net_device *dev, |
David S. Miller | 0c7b3ee | 2011-02-22 17:48:57 -0800 | [diff] [blame] | 303 | const struct flowi *fl); |
David S. Miller | 2774c13 | 2011-03-01 14:59:04 -0800 | [diff] [blame] | 304 | struct dst_entry *(*blackhole_route)(struct net *net, struct dst_entry *orig); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 305 | }; |
| 306 | |
Joe Perches | d511337 | 2013-09-23 11:33:53 -0700 | [diff] [blame] | 307 | int xfrm_policy_register_afinfo(struct xfrm_policy_afinfo *afinfo); |
| 308 | int xfrm_policy_unregister_afinfo(struct xfrm_policy_afinfo *afinfo); |
| 309 | void km_policy_notify(struct xfrm_policy *xp, int dir, |
| 310 | const struct km_event *c); |
| 311 | 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] | 312 | |
| 313 | struct xfrm_tmpl; |
Joe Perches | d511337 | 2013-09-23 11:33:53 -0700 | [diff] [blame] | 314 | int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, |
| 315 | struct xfrm_policy *pol); |
| 316 | void km_state_expired(struct xfrm_state *x, int hard, u32 portid); |
| 317 | int __xfrm_state_delete(struct xfrm_state *x); |
Jamal Hadi Salim | 53bc6b4 | 2006-03-20 19:17:03 -0800 | [diff] [blame] | 318 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 319 | struct xfrm_state_afinfo { |
Herbert Xu | 17c2a42 | 2007-10-17 21:33:12 -0700 | [diff] [blame] | 320 | unsigned int family; |
Herbert Xu | 36cf9ac | 2007-11-13 21:40:52 -0800 | [diff] [blame] | 321 | unsigned int proto; |
Al Viro | 8e3d716 | 2008-03-17 22:49:16 -0700 | [diff] [blame] | 322 | __be16 eth_proto; |
Herbert Xu | 17c2a42 | 2007-10-17 21:33:12 -0700 | [diff] [blame] | 323 | struct module *owner; |
Eric Dumazet | 533cb5b | 2008-01-30 19:11:50 -0800 | [diff] [blame] | 324 | const struct xfrm_type *type_map[IPPROTO_MAX]; |
Herbert Xu | aa5d62c | 2007-10-17 21:31:12 -0700 | [diff] [blame] | 325 | struct xfrm_mode *mode_map[XFRM_MODE_MAX]; |
Herbert Xu | d094cd8 | 2005-06-20 13:19:41 -0700 | [diff] [blame] | 326 | int (*init_flags)(struct xfrm_state *x); |
David S. Miller | 73e5ebb | 2011-02-22 17:51:44 -0800 | [diff] [blame] | 327 | void (*init_tempsel)(struct xfrm_selector *sel, |
| 328 | const struct flowi *fl); |
David S. Miller | 19bd624 | 2011-02-24 00:07:20 -0500 | [diff] [blame] | 329 | void (*init_temprop)(struct xfrm_state *x, |
| 330 | const struct xfrm_tmpl *tmpl, |
| 331 | const xfrm_address_t *daddr, |
| 332 | const xfrm_address_t *saddr); |
Masahide NAKAMURA | 41a49cc | 2006-08-23 22:48:31 -0700 | [diff] [blame] | 333 | int (*tmpl_sort)(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n); |
| 334 | int (*state_sort)(struct xfrm_state **dst, struct xfrm_state **src, int n); |
Eric W. Biederman | ede2059 | 2015-10-07 16:48:47 -0500 | [diff] [blame] | 335 | int (*output)(struct net *net, struct sock *sk, struct sk_buff *skb); |
David Miller | 7026b1d | 2015-04-05 22:19:04 -0400 | [diff] [blame] | 336 | int (*output_finish)(struct sock *sk, struct sk_buff *skb); |
Herbert Xu | 227620e | 2007-11-13 21:41:28 -0800 | [diff] [blame] | 337 | int (*extract_input)(struct xfrm_state *x, |
| 338 | struct sk_buff *skb); |
Herbert Xu | 36cf9ac | 2007-11-13 21:40:52 -0800 | [diff] [blame] | 339 | int (*extract_output)(struct xfrm_state *x, |
| 340 | struct sk_buff *skb); |
Herbert Xu | 716062f | 2007-11-13 21:44:23 -0800 | [diff] [blame] | 341 | int (*transport_finish)(struct sk_buff *skb, |
| 342 | int async); |
Hannes Frederic Sowa | 628e341 | 2013-08-14 13:05:23 +0200 | [diff] [blame] | 343 | void (*local_error)(struct sk_buff *skb, u32 mtu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 344 | }; |
| 345 | |
Joe Perches | d511337 | 2013-09-23 11:33:53 -0700 | [diff] [blame] | 346 | int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo); |
| 347 | int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo); |
| 348 | struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family); |
| 349 | void xfrm_state_put_afinfo(struct xfrm_state_afinfo *afinfo); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 350 | |
Steffen Klassert | 2f32b51 | 2014-03-14 07:28:07 +0100 | [diff] [blame] | 351 | struct xfrm_input_afinfo { |
| 352 | unsigned int family; |
| 353 | struct module *owner; |
| 354 | int (*callback)(struct sk_buff *skb, u8 protocol, |
| 355 | int err); |
| 356 | }; |
| 357 | |
| 358 | int xfrm_input_register_afinfo(struct xfrm_input_afinfo *afinfo); |
| 359 | int xfrm_input_unregister_afinfo(struct xfrm_input_afinfo *afinfo); |
| 360 | |
Joe Perches | d511337 | 2013-09-23 11:33:53 -0700 | [diff] [blame] | 361 | void xfrm_state_delete_tunnel(struct xfrm_state *x); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 362 | |
Eric Dumazet | fd2c3ef | 2009-11-03 03:26:03 +0000 | [diff] [blame] | 363 | struct xfrm_type { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 364 | char *description; |
| 365 | struct module *owner; |
jamal | a633746 | 2010-02-09 13:21:17 +0000 | [diff] [blame] | 366 | u8 proto; |
| 367 | u8 flags; |
Masahide NAKAMURA | 1b5c229 | 2006-08-23 18:11:50 -0700 | [diff] [blame] | 368 | #define XFRM_TYPE_NON_FRAGMENT 1 |
Herbert Xu | 436a0a4 | 2007-10-08 17:25:53 -0700 | [diff] [blame] | 369 | #define XFRM_TYPE_REPLAY_PROT 2 |
Herbert Xu | f04e7e8 | 2007-11-13 21:36:51 -0800 | [diff] [blame] | 370 | #define XFRM_TYPE_LOCAL_COADDR 4 |
| 371 | #define XFRM_TYPE_REMOTE_COADDR 8 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 372 | |
Herbert Xu | 72cb696 | 2005-06-20 13:18:08 -0700 | [diff] [blame] | 373 | int (*init_state)(struct xfrm_state *x); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 374 | void (*destructor)(struct xfrm_state *); |
Herbert Xu | e695633 | 2006-04-01 00:52:46 -0800 | [diff] [blame] | 375 | int (*input)(struct xfrm_state *, struct sk_buff *skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 376 | int (*output)(struct xfrm_state *, struct sk_buff *pskb); |
David S. Miller | 8f029de | 2011-02-22 17:59:59 -0800 | [diff] [blame] | 377 | int (*reject)(struct xfrm_state *, struct sk_buff *, |
| 378 | const struct flowi *); |
Masahide NAKAMURA | aee5adb | 2006-08-23 17:57:28 -0700 | [diff] [blame] | 379 | int (*hdr_offset)(struct xfrm_state *, struct sk_buff *, u8 **); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 380 | /* Estimate maximal size of result of transformation of a dgram */ |
Patrick McHardy | c5c2523 | 2007-04-09 11:47:18 -0700 | [diff] [blame] | 381 | u32 (*get_mtu)(struct xfrm_state *, int size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 382 | }; |
| 383 | |
Joe Perches | d511337 | 2013-09-23 11:33:53 -0700 | [diff] [blame] | 384 | int xfrm_register_type(const struct xfrm_type *type, unsigned short family); |
| 385 | int xfrm_unregister_type(const struct xfrm_type *type, unsigned short family); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 386 | |
Herbert Xu | b59f45d | 2006-05-27 23:05:54 -0700 | [diff] [blame] | 387 | struct xfrm_mode { |
Herbert Xu | 227620e | 2007-11-13 21:41:28 -0800 | [diff] [blame] | 388 | /* |
| 389 | * Remove encapsulation header. |
| 390 | * |
| 391 | * The IP header will be moved over the top of the encapsulation |
| 392 | * header. |
| 393 | * |
| 394 | * On entry, the transport header shall point to where the IP header |
| 395 | * should be and the network header shall be set to where the IP |
| 396 | * header currently is. skb->data shall point to the start of the |
| 397 | * payload. |
| 398 | */ |
| 399 | int (*input2)(struct xfrm_state *x, struct sk_buff *skb); |
| 400 | |
| 401 | /* |
| 402 | * This is the actual input entry point. |
| 403 | * |
| 404 | * For transport mode and equivalent this would be identical to |
| 405 | * input2 (which does not need to be set). While tunnel mode |
| 406 | * and equivalent would set this to the tunnel encapsulation function |
| 407 | * xfrm4_prepare_input that would in turn call input2. |
| 408 | */ |
Herbert Xu | b59f45d | 2006-05-27 23:05:54 -0700 | [diff] [blame] | 409 | int (*input)(struct xfrm_state *x, struct sk_buff *skb); |
Herbert Xu | 37fedd3 | 2007-10-10 15:44:44 -0700 | [diff] [blame] | 410 | |
| 411 | /* |
| 412 | * Add encapsulation header. |
| 413 | * |
| 414 | * On exit, the transport header will be set to the start of the |
| 415 | * encapsulation header to be filled in by x->type->output and |
| 416 | * the mac header will be set to the nextheader (protocol for |
| 417 | * IPv4) field of the extension header directly preceding the |
| 418 | * encapsulation header, or in its absence, that of the top IP |
| 419 | * header. The value of the network header will always point |
| 420 | * to the top IP header while skb->data will point to the payload. |
| 421 | */ |
Herbert Xu | 36cf9ac | 2007-11-13 21:40:52 -0800 | [diff] [blame] | 422 | int (*output2)(struct xfrm_state *x,struct sk_buff *skb); |
| 423 | |
| 424 | /* |
| 425 | * This is the actual output entry point. |
| 426 | * |
| 427 | * For transport mode and equivalent this would be identical to |
| 428 | * output2 (which does not need to be set). While tunnel mode |
| 429 | * and equivalent would set this to a tunnel encapsulation function |
| 430 | * (xfrm4_prepare_output or xfrm6_prepare_output) that would in turn |
| 431 | * call output2. |
| 432 | */ |
| 433 | int (*output)(struct xfrm_state *x, struct sk_buff *skb); |
Herbert Xu | b59f45d | 2006-05-27 23:05:54 -0700 | [diff] [blame] | 434 | |
Herbert Xu | 17c2a42 | 2007-10-17 21:33:12 -0700 | [diff] [blame] | 435 | struct xfrm_state_afinfo *afinfo; |
Herbert Xu | b59f45d | 2006-05-27 23:05:54 -0700 | [diff] [blame] | 436 | struct module *owner; |
| 437 | unsigned int encap; |
Herbert Xu | 1bfcb10 | 2007-10-17 21:31:50 -0700 | [diff] [blame] | 438 | int flags; |
| 439 | }; |
| 440 | |
| 441 | /* Flags for xfrm_mode. */ |
| 442 | enum { |
| 443 | XFRM_MODE_FLAG_TUNNEL = 1, |
Herbert Xu | b59f45d | 2006-05-27 23:05:54 -0700 | [diff] [blame] | 444 | }; |
| 445 | |
Joe Perches | d511337 | 2013-09-23 11:33:53 -0700 | [diff] [blame] | 446 | int xfrm_register_mode(struct xfrm_mode *mode, int family); |
| 447 | int xfrm_unregister_mode(struct xfrm_mode *mode, int family); |
Herbert Xu | b59f45d | 2006-05-27 23:05:54 -0700 | [diff] [blame] | 448 | |
Kazunori MIYAZAWA | df9dcb4 | 2008-03-24 14:51:51 -0700 | [diff] [blame] | 449 | static inline int xfrm_af2proto(unsigned int family) |
| 450 | { |
| 451 | switch(family) { |
| 452 | case AF_INET: |
| 453 | return IPPROTO_IPIP; |
| 454 | case AF_INET6: |
| 455 | return IPPROTO_IPV6; |
| 456 | default: |
| 457 | return 0; |
| 458 | } |
| 459 | } |
| 460 | |
| 461 | static inline struct xfrm_mode *xfrm_ip2inner_mode(struct xfrm_state *x, int ipproto) |
| 462 | { |
| 463 | if ((ipproto == IPPROTO_IPIP && x->props.family == AF_INET) || |
| 464 | (ipproto == IPPROTO_IPV6 && x->props.family == AF_INET6)) |
| 465 | return x->inner_mode; |
| 466 | else |
| 467 | return x->inner_mode_iaf; |
| 468 | } |
| 469 | |
Eric Dumazet | fd2c3ef | 2009-11-03 03:26:03 +0000 | [diff] [blame] | 470 | struct xfrm_tmpl { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 471 | /* id in template is interpreted as: |
| 472 | * daddr - destination of tunnel, may be zero for transport mode. |
| 473 | * spi - zero to acquire spi. Not zero if spi is static, then |
| 474 | * daddr must be fixed too. |
| 475 | * proto - AH/ESP/IPCOMP |
| 476 | */ |
| 477 | struct xfrm_id id; |
| 478 | |
| 479 | /* Source address of tunnel. Ignored, if it is not a tunnel. */ |
| 480 | xfrm_address_t saddr; |
| 481 | |
Miika Komu | 76b3f05 | 2006-11-30 16:40:43 -0800 | [diff] [blame] | 482 | unsigned short encap_family; |
| 483 | |
jamal | a633746 | 2010-02-09 13:21:17 +0000 | [diff] [blame] | 484 | u32 reqid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 485 | |
Masahide NAKAMURA | 7e49e6d | 2006-09-22 15:05:15 -0700 | [diff] [blame] | 486 | /* Mode: transport, tunnel etc. */ |
jamal | a633746 | 2010-02-09 13:21:17 +0000 | [diff] [blame] | 487 | u8 mode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 488 | |
| 489 | /* Sharing mode: unique, this session only, this user only etc. */ |
jamal | a633746 | 2010-02-09 13:21:17 +0000 | [diff] [blame] | 490 | u8 share; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 491 | |
| 492 | /* May skip this transfomration if no SA is found */ |
jamal | a633746 | 2010-02-09 13:21:17 +0000 | [diff] [blame] | 493 | u8 optional; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 494 | |
Herbert Xu | c5d18e9 | 2008-04-22 00:46:42 -0700 | [diff] [blame] | 495 | /* Skip aalgos/ealgos/calgos checks. */ |
jamal | a633746 | 2010-02-09 13:21:17 +0000 | [diff] [blame] | 496 | u8 allalgs; |
Herbert Xu | c5d18e9 | 2008-04-22 00:46:42 -0700 | [diff] [blame] | 497 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 498 | /* Bit mask of algos allowed for acquisition */ |
jamal | a633746 | 2010-02-09 13:21:17 +0000 | [diff] [blame] | 499 | u32 aalgos; |
| 500 | u32 ealgos; |
| 501 | u32 calgos; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 502 | }; |
| 503 | |
Masahide NAKAMURA | 622dc82 | 2006-08-23 17:52:01 -0700 | [diff] [blame] | 504 | #define XFRM_MAX_DEPTH 6 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 505 | |
Herbert Xu | 12a169e | 2008-10-01 07:03:24 -0700 | [diff] [blame] | 506 | struct xfrm_policy_walk_entry { |
| 507 | struct list_head all; |
| 508 | u8 dead; |
| 509 | }; |
| 510 | |
| 511 | struct xfrm_policy_walk { |
| 512 | struct xfrm_policy_walk_entry walk; |
| 513 | u8 type; |
| 514 | u32 seq; |
| 515 | }; |
| 516 | |
Steffen Klassert | a0073fe | 2013-02-05 12:52:55 +0100 | [diff] [blame] | 517 | struct xfrm_policy_queue { |
| 518 | struct sk_buff_head hold_queue; |
| 519 | struct timer_list hold_timer; |
| 520 | unsigned long timeout; |
| 521 | }; |
| 522 | |
Eric Dumazet | fd2c3ef | 2009-11-03 03:26:03 +0000 | [diff] [blame] | 523 | struct xfrm_policy { |
Eric W. Biederman | 0c5c9fb | 2015-03-11 23:06:44 -0500 | [diff] [blame] | 524 | possible_net_t xp_net; |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 525 | struct hlist_node bydst; |
| 526 | struct hlist_node byidx; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 527 | |
| 528 | /* This lock only affects elements except for entry. */ |
| 529 | rwlock_t lock; |
| 530 | atomic_t refcnt; |
| 531 | struct timer_list timer; |
| 532 | |
Timo Teräs | fe1a5f0 | 2010-04-07 00:30:04 +0000 | [diff] [blame] | 533 | struct flow_cache_object flo; |
Timo Teräs | 80c802f | 2010-04-07 00:30:05 +0000 | [diff] [blame] | 534 | atomic_t genid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 535 | u32 priority; |
| 536 | u32 index; |
Jamal Hadi Salim | bf825f81 | 2010-02-22 11:32:54 +0000 | [diff] [blame] | 537 | struct xfrm_mark mark; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 538 | struct xfrm_selector selector; |
| 539 | struct xfrm_lifetime_cfg lft; |
| 540 | struct xfrm_lifetime_cur curlft; |
Herbert Xu | 12a169e | 2008-10-01 07:03:24 -0700 | [diff] [blame] | 541 | struct xfrm_policy_walk_entry walk; |
Steffen Klassert | a0073fe | 2013-02-05 12:52:55 +0100 | [diff] [blame] | 542 | struct xfrm_policy_queue polq; |
Arnaldo Carvalho de Melo | 46ca5f5 | 2006-11-27 17:58:59 -0200 | [diff] [blame] | 543 | u8 type; |
| 544 | u8 action; |
| 545 | u8 flags; |
Arnaldo Carvalho de Melo | 46ca5f5 | 2006-11-27 17:58:59 -0200 | [diff] [blame] | 546 | u8 xfrm_nr; |
Herbert Xu | 12a169e | 2008-10-01 07:03:24 -0700 | [diff] [blame] | 547 | u16 family; |
Trent Jaeger | df71837 | 2005-12-13 23:12:27 -0800 | [diff] [blame] | 548 | struct xfrm_sec_ctx *security; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 549 | struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH]; |
Eric Dumazet | 56f0473 | 2015-12-08 07:22:01 -0800 | [diff] [blame] | 550 | struct rcu_head rcu; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 551 | }; |
| 552 | |
David S. Miller | 63eb23f | 2011-02-24 01:25:19 -0500 | [diff] [blame] | 553 | static inline struct net *xp_net(const struct xfrm_policy *xp) |
Alexey Dobriyan | 0331b1f | 2008-11-25 17:21:45 -0800 | [diff] [blame] | 554 | { |
| 555 | return read_pnet(&xp->xp_net); |
| 556 | } |
| 557 | |
Arnaud Ebalard | 13c1d18 | 2008-10-05 13:33:42 -0700 | [diff] [blame] | 558 | struct xfrm_kmaddress { |
| 559 | xfrm_address_t local; |
| 560 | xfrm_address_t remote; |
| 561 | u32 reserved; |
| 562 | u16 family; |
| 563 | }; |
| 564 | |
Shinta Sugimoto | 80c9aba | 2007-02-08 13:11:42 -0800 | [diff] [blame] | 565 | struct xfrm_migrate { |
| 566 | xfrm_address_t old_daddr; |
| 567 | xfrm_address_t old_saddr; |
| 568 | xfrm_address_t new_daddr; |
| 569 | xfrm_address_t new_saddr; |
| 570 | u8 proto; |
| 571 | u8 mode; |
| 572 | u16 reserved; |
| 573 | u32 reqid; |
| 574 | u16 old_family; |
| 575 | u16 new_family; |
| 576 | }; |
| 577 | |
Jamal Hadi Salim | f8cd548 | 2006-03-20 19:15:11 -0800 | [diff] [blame] | 578 | #define XFRM_KM_TIMEOUT 30 |
Jamal Hadi Salim | f8cd548 | 2006-03-20 19:15:11 -0800 | [diff] [blame] | 579 | /* what happened */ |
| 580 | #define XFRM_REPLAY_UPDATE XFRM_AE_CR |
| 581 | #define XFRM_REPLAY_TIMEOUT XFRM_AE_CE |
| 582 | |
| 583 | /* default aevent timeout in units of 100ms */ |
| 584 | #define XFRM_AE_ETIME 10 |
| 585 | /* Async Event timer multiplier */ |
| 586 | #define XFRM_AE_ETH_M 10 |
| 587 | /* default seq threshold size */ |
| 588 | #define XFRM_AE_SEQT_SIZE 2 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 589 | |
Eric Dumazet | fd2c3ef | 2009-11-03 03:26:03 +0000 | [diff] [blame] | 590 | struct xfrm_mgr { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 591 | struct list_head list; |
| 592 | char *id; |
David S. Miller | 214e005 | 2011-02-24 00:02:38 -0500 | [diff] [blame] | 593 | int (*notify)(struct xfrm_state *x, const struct km_event *c); |
Fan Du | 65e0736 | 2012-08-15 10:13:47 +0800 | [diff] [blame] | 594 | int (*acquire)(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *xp); |
Venkat Yekkirala | cb969f0 | 2006-07-24 23:32:20 -0700 | [diff] [blame] | 595 | 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] | 596 | 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] | 597 | 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] | 598 | 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] | 599 | int (*migrate)(const struct xfrm_selector *sel, |
| 600 | u8 dir, u8 type, |
| 601 | const struct xfrm_migrate *m, |
| 602 | int num_bundles, |
| 603 | const struct xfrm_kmaddress *k); |
Horia Geanta | 0f24558 | 2014-02-12 16:20:06 +0200 | [diff] [blame] | 604 | bool (*is_alive)(const struct km_event *c); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 605 | }; |
| 606 | |
Joe Perches | d511337 | 2013-09-23 11:33:53 -0700 | [diff] [blame] | 607 | int xfrm_register_km(struct xfrm_mgr *km); |
| 608 | int xfrm_unregister_km(struct xfrm_mgr *km); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 609 | |
Steffen Klassert | 70be6c9 | 2014-02-21 08:41:09 +0100 | [diff] [blame] | 610 | struct xfrm_tunnel_skb_cb { |
| 611 | union { |
| 612 | struct inet_skb_parm h4; |
| 613 | struct inet6_skb_parm h6; |
| 614 | } header; |
| 615 | |
| 616 | union { |
| 617 | struct ip_tunnel *ip4; |
| 618 | struct ip6_tnl *ip6; |
| 619 | } tunnel; |
| 620 | }; |
| 621 | |
| 622 | #define XFRM_TUNNEL_SKB_CB(__skb) ((struct xfrm_tunnel_skb_cb *)&((__skb)->cb[0])) |
| 623 | |
Herbert Xu | 436a0a4 | 2007-10-08 17:25:53 -0700 | [diff] [blame] | 624 | /* |
| 625 | * This structure is used for the duration where packets are being |
| 626 | * transformed by IPsec. As soon as the packet leaves IPsec the |
| 627 | * area beyond the generic IP part may be overwritten. |
| 628 | */ |
| 629 | struct xfrm_skb_cb { |
Steffen Klassert | 70be6c9 | 2014-02-21 08:41:09 +0100 | [diff] [blame] | 630 | struct xfrm_tunnel_skb_cb header; |
Herbert Xu | 436a0a4 | 2007-10-08 17:25:53 -0700 | [diff] [blame] | 631 | |
| 632 | /* Sequence number for replay protection. */ |
Herbert Xu | b318e0e | 2008-02-12 22:50:35 -0800 | [diff] [blame] | 633 | union { |
Steffen Klassert | 1ce3644 | 2011-03-08 00:06:31 +0000 | [diff] [blame] | 634 | struct { |
| 635 | __u32 low; |
| 636 | __u32 hi; |
| 637 | } output; |
| 638 | struct { |
| 639 | __be32 low; |
| 640 | __be32 hi; |
| 641 | } input; |
Herbert Xu | b318e0e | 2008-02-12 22:50:35 -0800 | [diff] [blame] | 642 | } seq; |
Herbert Xu | 436a0a4 | 2007-10-08 17:25:53 -0700 | [diff] [blame] | 643 | }; |
| 644 | |
| 645 | #define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0])) |
| 646 | |
Herbert Xu | 36cf9ac | 2007-11-13 21:40:52 -0800 | [diff] [blame] | 647 | /* |
| 648 | * This structure is used by the afinfo prepare_input/prepare_output functions |
| 649 | * to transmit header information to the mode input/output functions. |
| 650 | */ |
| 651 | struct xfrm_mode_skb_cb { |
Steffen Klassert | 70be6c9 | 2014-02-21 08:41:09 +0100 | [diff] [blame] | 652 | struct xfrm_tunnel_skb_cb header; |
Herbert Xu | 36cf9ac | 2007-11-13 21:40:52 -0800 | [diff] [blame] | 653 | |
| 654 | /* Copied from header for IPv4, always set to zero and DF for IPv6. */ |
| 655 | __be16 id; |
| 656 | __be16 frag_off; |
| 657 | |
Herbert Xu | 732c8bd | 2008-03-26 16:51:09 -0700 | [diff] [blame] | 658 | /* IP header length (excluding options or extension headers). */ |
| 659 | u8 ihl; |
| 660 | |
Herbert Xu | 36cf9ac | 2007-11-13 21:40:52 -0800 | [diff] [blame] | 661 | /* TOS for IPv4, class for IPv6. */ |
| 662 | u8 tos; |
| 663 | |
| 664 | /* TTL for IPv4, hop limitfor IPv6. */ |
| 665 | u8 ttl; |
| 666 | |
| 667 | /* Protocol for IPv4, NH for IPv6. */ |
| 668 | u8 protocol; |
| 669 | |
Herbert Xu | 732c8bd | 2008-03-26 16:51:09 -0700 | [diff] [blame] | 670 | /* Option length for IPv4, zero for IPv6. */ |
| 671 | u8 optlen; |
| 672 | |
Herbert Xu | 36cf9ac | 2007-11-13 21:40:52 -0800 | [diff] [blame] | 673 | /* Used by IPv6 only, zero for IPv4. */ |
| 674 | u8 flow_lbl[3]; |
| 675 | }; |
| 676 | |
| 677 | #define XFRM_MODE_SKB_CB(__skb) ((struct xfrm_mode_skb_cb *)&((__skb)->cb[0])) |
| 678 | |
Herbert Xu | 716062f | 2007-11-13 21:44:23 -0800 | [diff] [blame] | 679 | /* |
| 680 | * This structure is used by the input processing to locate the SPI and |
| 681 | * related information. |
| 682 | */ |
| 683 | struct xfrm_spi_skb_cb { |
Steffen Klassert | 70be6c9 | 2014-02-21 08:41:09 +0100 | [diff] [blame] | 684 | struct xfrm_tunnel_skb_cb header; |
Herbert Xu | 716062f | 2007-11-13 21:44:23 -0800 | [diff] [blame] | 685 | |
Herbert Xu | 716062f | 2007-11-13 21:44:23 -0800 | [diff] [blame] | 686 | unsigned int daddroff; |
Herbert Xu | 2fcb45b | 2007-12-03 22:54:12 -0800 | [diff] [blame] | 687 | unsigned int family; |
Herbert Xu | 716062f | 2007-11-13 21:44:23 -0800 | [diff] [blame] | 688 | }; |
| 689 | |
| 690 | #define XFRM_SPI_SKB_CB(__skb) ((struct xfrm_spi_skb_cb *)&((__skb)->cb[0])) |
| 691 | |
Joy Latten | c9204d9 | 2006-11-30 15:50:43 -0600 | [diff] [blame] | 692 | #ifdef CONFIG_AUDITSYSCALL |
Paul Moore | afeb14b | 2007-12-21 14:58:11 -0800 | [diff] [blame] | 693 | static inline struct audit_buffer *xfrm_audit_start(const char *op) |
Joy Latten | ab5f5e8 | 2007-09-17 11:51:22 -0700 | [diff] [blame] | 694 | { |
| 695 | struct audit_buffer *audit_buf = NULL; |
Paul Moore | afeb14b | 2007-12-21 14:58:11 -0800 | [diff] [blame] | 696 | |
| 697 | if (audit_enabled == 0) |
| 698 | return NULL; |
| 699 | audit_buf = audit_log_start(current->audit_context, GFP_ATOMIC, |
| 700 | AUDIT_MAC_IPSEC_EVENT); |
| 701 | if (audit_buf == NULL) |
| 702 | return NULL; |
| 703 | audit_log_format(audit_buf, "op=%s", op); |
| 704 | return audit_buf; |
| 705 | } |
| 706 | |
Tetsuo Handa | 2e71029 | 2014-04-22 21:48:30 +0900 | [diff] [blame] | 707 | static inline void xfrm_audit_helper_usrinfo(bool task_valid, |
Paul Moore | afeb14b | 2007-12-21 14:58:11 -0800 | [diff] [blame] | 708 | struct audit_buffer *audit_buf) |
| 709 | { |
Tetsuo Handa | 2e71029 | 2014-04-22 21:48:30 +0900 | [diff] [blame] | 710 | const unsigned int auid = from_kuid(&init_user_ns, task_valid ? |
| 711 | audit_get_loginuid(current) : |
| 712 | INVALID_UID); |
| 713 | const unsigned int ses = task_valid ? audit_get_sessionid(current) : |
| 714 | (unsigned int) -1; |
| 715 | |
| 716 | audit_log_format(audit_buf, " auid=%u ses=%u", auid, ses); |
Tetsuo Handa | f1370cc | 2014-04-18 16:23:46 +0900 | [diff] [blame] | 717 | audit_log_task_context(audit_buf); |
Joy Latten | ab5f5e8 | 2007-09-17 11:51:22 -0700 | [diff] [blame] | 718 | } |
| 719 | |
Tetsuo Handa | 2e71029 | 2014-04-22 21:48:30 +0900 | [diff] [blame] | 720 | void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, bool task_valid); |
| 721 | void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, |
| 722 | bool task_valid); |
| 723 | void xfrm_audit_state_add(struct xfrm_state *x, int result, bool task_valid); |
| 724 | void xfrm_audit_state_delete(struct xfrm_state *x, int result, bool task_valid); |
Joe Perches | d511337 | 2013-09-23 11:33:53 -0700 | [diff] [blame] | 725 | void xfrm_audit_state_replay_overflow(struct xfrm_state *x, |
| 726 | struct sk_buff *skb); |
| 727 | void xfrm_audit_state_replay(struct xfrm_state *x, struct sk_buff *skb, |
| 728 | __be32 net_seq); |
| 729 | void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family); |
| 730 | void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, __be32 net_spi, |
| 731 | __be32 net_seq); |
| 732 | void xfrm_audit_state_icvfail(struct xfrm_state *x, struct sk_buff *skb, |
| 733 | u8 proto); |
Joy Latten | c9204d9 | 2006-11-30 15:50:43 -0600 | [diff] [blame] | 734 | #else |
Marcin Slusarz | 41fef0e | 2008-05-03 21:03:01 -0700 | [diff] [blame] | 735 | |
| 736 | static inline void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, |
Tetsuo Handa | 2e71029 | 2014-04-22 21:48:30 +0900 | [diff] [blame] | 737 | bool task_valid) |
Marcin Slusarz | 41fef0e | 2008-05-03 21:03:01 -0700 | [diff] [blame] | 738 | { |
| 739 | } |
| 740 | |
| 741 | static inline void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, |
Tetsuo Handa | 2e71029 | 2014-04-22 21:48:30 +0900 | [diff] [blame] | 742 | bool task_valid) |
Marcin Slusarz | 41fef0e | 2008-05-03 21:03:01 -0700 | [diff] [blame] | 743 | { |
| 744 | } |
| 745 | |
| 746 | static inline void xfrm_audit_state_add(struct xfrm_state *x, int result, |
Tetsuo Handa | 2e71029 | 2014-04-22 21:48:30 +0900 | [diff] [blame] | 747 | bool task_valid) |
Marcin Slusarz | 41fef0e | 2008-05-03 21:03:01 -0700 | [diff] [blame] | 748 | { |
| 749 | } |
| 750 | |
| 751 | static inline void xfrm_audit_state_delete(struct xfrm_state *x, int result, |
Tetsuo Handa | 2e71029 | 2014-04-22 21:48:30 +0900 | [diff] [blame] | 752 | bool task_valid) |
Marcin Slusarz | 41fef0e | 2008-05-03 21:03:01 -0700 | [diff] [blame] | 753 | { |
| 754 | } |
| 755 | |
| 756 | static inline void xfrm_audit_state_replay_overflow(struct xfrm_state *x, |
| 757 | struct sk_buff *skb) |
| 758 | { |
| 759 | } |
| 760 | |
Steffen Klassert | 9fdc488 | 2011-03-08 00:08:32 +0000 | [diff] [blame] | 761 | static inline void xfrm_audit_state_replay(struct xfrm_state *x, |
| 762 | struct sk_buff *skb, __be32 net_seq) |
| 763 | { |
| 764 | } |
| 765 | |
Marcin Slusarz | 41fef0e | 2008-05-03 21:03:01 -0700 | [diff] [blame] | 766 | static inline void xfrm_audit_state_notfound_simple(struct sk_buff *skb, |
| 767 | u16 family) |
| 768 | { |
| 769 | } |
| 770 | |
| 771 | static inline void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, |
| 772 | __be32 net_spi, __be32 net_seq) |
| 773 | { |
| 774 | } |
| 775 | |
| 776 | static inline void xfrm_audit_state_icvfail(struct xfrm_state *x, |
| 777 | struct sk_buff *skb, u8 proto) |
| 778 | { |
| 779 | } |
Joy Latten | c9204d9 | 2006-11-30 15:50:43 -0600 | [diff] [blame] | 780 | #endif /* CONFIG_AUDITSYSCALL */ |
Joy Latten | 161a09e | 2006-11-27 13:11:54 -0600 | [diff] [blame] | 781 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 782 | static inline void xfrm_pol_hold(struct xfrm_policy *policy) |
| 783 | { |
| 784 | if (likely(policy != NULL)) |
| 785 | atomic_inc(&policy->refcnt); |
| 786 | } |
| 787 | |
Joe Perches | d511337 | 2013-09-23 11:33:53 -0700 | [diff] [blame] | 788 | void xfrm_policy_destroy(struct xfrm_policy *policy); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 789 | |
| 790 | static inline void xfrm_pol_put(struct xfrm_policy *policy) |
| 791 | { |
| 792 | if (atomic_dec_and_test(&policy->refcnt)) |
WANG Cong | 64c31b3 | 2008-01-07 22:34:29 -0800 | [diff] [blame] | 793 | xfrm_policy_destroy(policy); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 794 | } |
| 795 | |
Masahide NAKAMURA | 4e81bb8 | 2006-08-23 22:43:30 -0700 | [diff] [blame] | 796 | static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols) |
| 797 | { |
| 798 | int i; |
| 799 | for (i = npols - 1; i >= 0; --i) |
| 800 | xfrm_pol_put(pols[i]); |
| 801 | } |
Masahide NAKAMURA | 4e81bb8 | 2006-08-23 22:43:30 -0700 | [diff] [blame] | 802 | |
Joe Perches | d511337 | 2013-09-23 11:33:53 -0700 | [diff] [blame] | 803 | void __xfrm_state_destroy(struct xfrm_state *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 804 | |
Herbert Xu | 21380b8 | 2006-02-22 14:47:13 -0800 | [diff] [blame] | 805 | static inline void __xfrm_state_put(struct xfrm_state *x) |
| 806 | { |
| 807 | atomic_dec(&x->refcnt); |
| 808 | } |
| 809 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 810 | static inline void xfrm_state_put(struct xfrm_state *x) |
| 811 | { |
| 812 | if (atomic_dec_and_test(&x->refcnt)) |
| 813 | __xfrm_state_destroy(x); |
| 814 | } |
| 815 | |
| 816 | static inline void xfrm_state_hold(struct xfrm_state *x) |
| 817 | { |
| 818 | atomic_inc(&x->refcnt); |
| 819 | } |
| 820 | |
David S. Miller | 1744a8f | 2011-02-22 18:02:12 -0800 | [diff] [blame] | 821 | static inline bool addr_match(const void *token1, const void *token2, |
| 822 | int prefixlen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 823 | { |
David S. Miller | 1744a8f | 2011-02-22 18:02:12 -0800 | [diff] [blame] | 824 | const __be32 *a1 = token1; |
| 825 | const __be32 *a2 = token2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 826 | int pdw; |
| 827 | int pbi; |
| 828 | |
jamal | a633746 | 2010-02-09 13:21:17 +0000 | [diff] [blame] | 829 | pdw = prefixlen >> 5; /* num of whole u32 in prefix */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 830 | pbi = prefixlen & 0x1f; /* num of bits in incomplete u32 in prefix */ |
| 831 | |
| 832 | if (pdw) |
| 833 | if (memcmp(a1, a2, pdw << 2)) |
David S. Miller | 1744a8f | 2011-02-22 18:02:12 -0800 | [diff] [blame] | 834 | return false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 835 | |
| 836 | if (pbi) { |
Al Viro | 5f19343 | 2006-09-27 18:46:32 -0700 | [diff] [blame] | 837 | __be32 mask; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 838 | |
| 839 | mask = htonl((0xffffffff) << (32 - pbi)); |
| 840 | |
| 841 | if ((a1[pdw] ^ a2[pdw]) & mask) |
David S. Miller | 1744a8f | 2011-02-22 18:02:12 -0800 | [diff] [blame] | 842 | return false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 843 | } |
| 844 | |
David S. Miller | 1744a8f | 2011-02-22 18:02:12 -0800 | [diff] [blame] | 845 | return true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 846 | } |
| 847 | |
Alexey Dobriyan | 26bff94 | 2011-11-22 06:46:02 +0000 | [diff] [blame] | 848 | static inline bool addr4_match(__be32 a1, __be32 a2, u8 prefixlen) |
| 849 | { |
| 850 | /* C99 6.5.7 (3): u32 << 32 is undefined behaviour */ |
| 851 | if (prefixlen == 0) |
| 852 | return true; |
| 853 | return !((a1 ^ a2) & htonl(0xFFFFFFFFu << (32 - prefixlen))); |
| 854 | } |
| 855 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 856 | static __inline__ |
David S. Miller | 6281dcc | 2011-03-12 00:43:55 -0500 | [diff] [blame] | 857 | __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] | 858 | { |
Al Viro | f9d07e41f8 | 2006-09-27 18:45:50 -0700 | [diff] [blame] | 859 | __be16 port; |
David S. Miller | 1d28f42 | 2011-03-12 00:29:39 -0500 | [diff] [blame] | 860 | switch(fl->flowi_proto) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 861 | case IPPROTO_TCP: |
| 862 | case IPPROTO_UDP: |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 863 | case IPPROTO_UDPLITE: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 864 | case IPPROTO_SCTP: |
David S. Miller | 6281dcc | 2011-03-12 00:43:55 -0500 | [diff] [blame] | 865 | port = uli->ports.sport; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 866 | break; |
| 867 | case IPPROTO_ICMP: |
| 868 | case IPPROTO_ICMPV6: |
David S. Miller | 6281dcc | 2011-03-12 00:43:55 -0500 | [diff] [blame] | 869 | port = htons(uli->icmpt.type); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 870 | break; |
Masahide NAKAMURA | 2ce4272 | 2006-08-23 20:39:03 -0700 | [diff] [blame] | 871 | case IPPROTO_MH: |
David S. Miller | 6281dcc | 2011-03-12 00:43:55 -0500 | [diff] [blame] | 872 | port = htons(uli->mht.type); |
Masahide NAKAMURA | 2ce4272 | 2006-08-23 20:39:03 -0700 | [diff] [blame] | 873 | break; |
Timo Teräs | cc9ff19 | 2010-11-03 04:41:38 +0000 | [diff] [blame] | 874 | case IPPROTO_GRE: |
David S. Miller | 6281dcc | 2011-03-12 00:43:55 -0500 | [diff] [blame] | 875 | port = htons(ntohl(uli->gre_key) >> 16); |
Timo Teräs | cc9ff19 | 2010-11-03 04:41:38 +0000 | [diff] [blame] | 876 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 877 | default: |
| 878 | port = 0; /*XXX*/ |
| 879 | } |
| 880 | return port; |
| 881 | } |
| 882 | |
| 883 | static __inline__ |
David S. Miller | 6281dcc | 2011-03-12 00:43:55 -0500 | [diff] [blame] | 884 | __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] | 885 | { |
Al Viro | f9d07e41f8 | 2006-09-27 18:45:50 -0700 | [diff] [blame] | 886 | __be16 port; |
David S. Miller | 1d28f42 | 2011-03-12 00:29:39 -0500 | [diff] [blame] | 887 | switch(fl->flowi_proto) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 888 | case IPPROTO_TCP: |
| 889 | case IPPROTO_UDP: |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 890 | case IPPROTO_UDPLITE: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 891 | case IPPROTO_SCTP: |
David S. Miller | 6281dcc | 2011-03-12 00:43:55 -0500 | [diff] [blame] | 892 | port = uli->ports.dport; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 893 | break; |
| 894 | case IPPROTO_ICMP: |
| 895 | case IPPROTO_ICMPV6: |
David S. Miller | 6281dcc | 2011-03-12 00:43:55 -0500 | [diff] [blame] | 896 | port = htons(uli->icmpt.code); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 897 | break; |
Timo Teräs | cc9ff19 | 2010-11-03 04:41:38 +0000 | [diff] [blame] | 898 | case IPPROTO_GRE: |
David S. Miller | 6281dcc | 2011-03-12 00:43:55 -0500 | [diff] [blame] | 899 | port = htons(ntohl(uli->gre_key) & 0xffff); |
Timo Teräs | cc9ff19 | 2010-11-03 04:41:38 +0000 | [diff] [blame] | 900 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 901 | default: |
| 902 | port = 0; /*XXX*/ |
| 903 | } |
| 904 | return port; |
| 905 | } |
| 906 | |
Joe Perches | d511337 | 2013-09-23 11:33:53 -0700 | [diff] [blame] | 907 | bool xfrm_selector_match(const struct xfrm_selector *sel, |
| 908 | const struct flowi *fl, unsigned short family); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 909 | |
Trent Jaeger | df71837 | 2005-12-13 23:12:27 -0800 | [diff] [blame] | 910 | #ifdef CONFIG_SECURITY_NETWORK_XFRM |
| 911 | /* If neither has a context --> match |
| 912 | * Otherwise, both must have a context and the sids, doi, alg must match |
| 913 | */ |
David S. Miller | bc9b35a | 2012-05-15 15:04:57 -0400 | [diff] [blame] | 914 | 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] | 915 | { |
| 916 | return ((!s1 && !s2) || |
| 917 | (s1 && s2 && |
| 918 | (s1->ctx_sid == s2->ctx_sid) && |
| 919 | (s1->ctx_doi == s2->ctx_doi) && |
| 920 | (s1->ctx_alg == s2->ctx_alg))); |
| 921 | } |
| 922 | #else |
David S. Miller | bc9b35a | 2012-05-15 15:04:57 -0400 | [diff] [blame] | 923 | 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] | 924 | { |
David S. Miller | bc9b35a | 2012-05-15 15:04:57 -0400 | [diff] [blame] | 925 | return true; |
Trent Jaeger | df71837 | 2005-12-13 23:12:27 -0800 | [diff] [blame] | 926 | } |
| 927 | #endif |
| 928 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 929 | /* A struct encoding bundle of transformations to apply to some set of flow. |
| 930 | * |
| 931 | * dst->child points to the next element of bundle. |
| 932 | * dst->xfrm points to an instanse of transformer. |
| 933 | * |
| 934 | * Due to unfortunate limitations of current routing cache, which we |
| 935 | * have no time to fix, it mirrors struct rtable and bound to the same |
| 936 | * routing key, including saddr,daddr. However, we can have many of |
| 937 | * bundles differing by session id. All the bundles grow from a parent |
| 938 | * policy rule. |
| 939 | */ |
Eric Dumazet | fd2c3ef | 2009-11-03 03:26:03 +0000 | [diff] [blame] | 940 | struct xfrm_dst { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 941 | union { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 942 | struct dst_entry dst; |
| 943 | struct rtable rt; |
| 944 | struct rt6_info rt6; |
| 945 | } u; |
| 946 | struct dst_entry *route; |
Timo Teräs | 80c802f | 2010-04-07 00:30:05 +0000 | [diff] [blame] | 947 | struct flow_cache_object flo; |
| 948 | struct xfrm_policy *pols[XFRM_POLICY_TYPE_MAX]; |
| 949 | int num_pols, num_xfrms; |
Timo Teräs | 80c802f | 2010-04-07 00:30:05 +0000 | [diff] [blame] | 950 | u32 xfrm_genid; |
| 951 | u32 policy_genid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 952 | u32 route_mtu_cached; |
| 953 | u32 child_mtu_cached; |
Hideaki YOSHIFUJI | 92d63dec | 2005-05-26 12:58:04 -0700 | [diff] [blame] | 954 | u32 route_cookie; |
| 955 | u32 path_cookie; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 956 | }; |
| 957 | |
Alexey Dobriyan | def8b4f | 2008-10-28 13:24:06 -0700 | [diff] [blame] | 958 | #ifdef CONFIG_XFRM |
Herbert Xu | aabc976 | 2005-05-03 16:27:10 -0700 | [diff] [blame] | 959 | static inline void xfrm_dst_destroy(struct xfrm_dst *xdst) |
| 960 | { |
Timo Teräs | 80c802f | 2010-04-07 00:30:05 +0000 | [diff] [blame] | 961 | xfrm_pols_put(xdst->pols, xdst->num_pols); |
Herbert Xu | aabc976 | 2005-05-03 16:27:10 -0700 | [diff] [blame] | 962 | dst_release(xdst->route); |
| 963 | if (likely(xdst->u.dst.xfrm)) |
| 964 | xfrm_state_put(xdst->u.dst.xfrm); |
| 965 | } |
Alexey Dobriyan | def8b4f | 2008-10-28 13:24:06 -0700 | [diff] [blame] | 966 | #endif |
Herbert Xu | aabc976 | 2005-05-03 16:27:10 -0700 | [diff] [blame] | 967 | |
Joe Perches | d511337 | 2013-09-23 11:33:53 -0700 | [diff] [blame] | 968 | void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev); |
Herbert Xu | aabc976 | 2005-05-03 16:27:10 -0700 | [diff] [blame] | 969 | |
Eric Dumazet | fd2c3ef | 2009-11-03 03:26:03 +0000 | [diff] [blame] | 970 | struct sec_path { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 971 | atomic_t refcnt; |
| 972 | int len; |
Herbert Xu | dbe5b4a | 2006-04-01 00:54:16 -0800 | [diff] [blame] | 973 | struct xfrm_state *xvec[XFRM_MAX_DEPTH]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 974 | }; |
| 975 | |
Michael Smith | 990078a | 2011-04-07 04:51:51 +0000 | [diff] [blame] | 976 | static inline int secpath_exists(struct sk_buff *skb) |
| 977 | { |
| 978 | #ifdef CONFIG_XFRM |
| 979 | return skb->sp != NULL; |
| 980 | #else |
| 981 | return 0; |
| 982 | #endif |
| 983 | } |
| 984 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 985 | static inline struct sec_path * |
| 986 | secpath_get(struct sec_path *sp) |
| 987 | { |
| 988 | if (sp) |
| 989 | atomic_inc(&sp->refcnt); |
| 990 | return sp; |
| 991 | } |
| 992 | |
Joe Perches | d511337 | 2013-09-23 11:33:53 -0700 | [diff] [blame] | 993 | void __secpath_destroy(struct sec_path *sp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 994 | |
| 995 | static inline void |
| 996 | secpath_put(struct sec_path *sp) |
| 997 | { |
| 998 | if (sp && atomic_dec_and_test(&sp->refcnt)) |
| 999 | __secpath_destroy(sp); |
| 1000 | } |
| 1001 | |
Joe Perches | d511337 | 2013-09-23 11:33:53 -0700 | [diff] [blame] | 1002 | struct sec_path *secpath_dup(struct sec_path *src); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1003 | |
| 1004 | static inline void |
| 1005 | secpath_reset(struct sk_buff *skb) |
| 1006 | { |
| 1007 | #ifdef CONFIG_XFRM |
| 1008 | secpath_put(skb->sp); |
| 1009 | skb->sp = NULL; |
| 1010 | #endif |
| 1011 | } |
| 1012 | |
| 1013 | static inline int |
David S. Miller | 6cc3296 | 2011-02-24 00:19:59 -0500 | [diff] [blame] | 1014 | xfrm_addr_any(const xfrm_address_t *addr, unsigned short family) |
Patrick McHardy | a1e59ab | 2006-09-19 12:57:34 -0700 | [diff] [blame] | 1015 | { |
| 1016 | switch (family) { |
| 1017 | case AF_INET: |
| 1018 | return addr->a4 == 0; |
| 1019 | case AF_INET6: |
Jiri Benc | 15e318b | 2015-03-29 16:59:24 +0200 | [diff] [blame] | 1020 | return ipv6_addr_any(&addr->in6); |
Patrick McHardy | a1e59ab | 2006-09-19 12:57:34 -0700 | [diff] [blame] | 1021 | } |
| 1022 | return 0; |
| 1023 | } |
| 1024 | |
| 1025 | static inline int |
David S. Miller | 21eddb5 | 2011-02-24 01:35:16 -0500 | [diff] [blame] | 1026 | __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] | 1027 | { |
| 1028 | return (tmpl->saddr.a4 && |
| 1029 | tmpl->saddr.a4 != x->props.saddr.a4); |
| 1030 | } |
| 1031 | |
| 1032 | static inline int |
David S. Miller | 21eddb5 | 2011-02-24 01:35:16 -0500 | [diff] [blame] | 1033 | __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] | 1034 | { |
| 1035 | return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) && |
YOSHIFUJI Hideaki / 吉藤英明 | ff88b30 | 2013-01-29 12:48:31 +0000 | [diff] [blame] | 1036 | !ipv6_addr_equal((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1037 | } |
| 1038 | |
| 1039 | static inline int |
David S. Miller | 21eddb5 | 2011-02-24 01:35:16 -0500 | [diff] [blame] | 1040 | 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] | 1041 | { |
| 1042 | switch (family) { |
| 1043 | case AF_INET: |
| 1044 | return __xfrm4_state_addr_cmp(tmpl, x); |
| 1045 | case AF_INET6: |
| 1046 | return __xfrm6_state_addr_cmp(tmpl, x); |
| 1047 | } |
| 1048 | return !0; |
| 1049 | } |
| 1050 | |
| 1051 | #ifdef CONFIG_XFRM |
Joe Perches | d511337 | 2013-09-23 11:33:53 -0700 | [diff] [blame] | 1052 | int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb, |
| 1053 | unsigned short family); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1054 | |
Herbert Xu | d5422ef | 2007-12-12 10:44:16 -0800 | [diff] [blame] | 1055 | static inline int __xfrm_policy_check2(struct sock *sk, int dir, |
| 1056 | struct sk_buff *skb, |
| 1057 | unsigned int family, int reverse) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1058 | { |
Alexey Dobriyan | f6e1e25 | 2008-11-25 17:35:44 -0800 | [diff] [blame] | 1059 | struct net *net = dev_net(skb->dev); |
Herbert Xu | d5422ef | 2007-12-12 10:44:16 -0800 | [diff] [blame] | 1060 | int ndir = dir | (reverse ? XFRM_POLICY_MASK + 1 : 0); |
| 1061 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1062 | if (sk && sk->sk_policy[XFRM_POLICY_IN]) |
Herbert Xu | d5422ef | 2007-12-12 10:44:16 -0800 | [diff] [blame] | 1063 | return __xfrm_policy_check(sk, ndir, skb, family); |
Masahide NAKAMURA | 4e81bb8 | 2006-08-23 22:43:30 -0700 | [diff] [blame] | 1064 | |
Alexey Dobriyan | f6e1e25 | 2008-11-25 17:35:44 -0800 | [diff] [blame] | 1065 | return (!net->xfrm.policy_count[dir] && !skb->sp) || |
Eric Dumazet | adf3090 | 2009-06-02 05:19:30 +0000 | [diff] [blame] | 1066 | (skb_dst(skb)->flags & DST_NOPOLICY) || |
Herbert Xu | d5422ef | 2007-12-12 10:44:16 -0800 | [diff] [blame] | 1067 | __xfrm_policy_check(sk, ndir, skb, family); |
| 1068 | } |
| 1069 | |
| 1070 | static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) |
| 1071 | { |
| 1072 | return __xfrm_policy_check2(sk, dir, skb, family, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1073 | } |
| 1074 | |
| 1075 | static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) |
| 1076 | { |
| 1077 | return xfrm_policy_check(sk, dir, skb, AF_INET); |
| 1078 | } |
| 1079 | |
| 1080 | static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) |
| 1081 | { |
| 1082 | return xfrm_policy_check(sk, dir, skb, AF_INET6); |
| 1083 | } |
| 1084 | |
Herbert Xu | d5422ef | 2007-12-12 10:44:16 -0800 | [diff] [blame] | 1085 | static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir, |
| 1086 | struct sk_buff *skb) |
| 1087 | { |
| 1088 | return __xfrm_policy_check2(sk, dir, skb, AF_INET, 1); |
| 1089 | } |
| 1090 | |
| 1091 | static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir, |
| 1092 | struct sk_buff *skb) |
| 1093 | { |
| 1094 | return __xfrm_policy_check2(sk, dir, skb, AF_INET6, 1); |
| 1095 | } |
| 1096 | |
Joe Perches | d511337 | 2013-09-23 11:33:53 -0700 | [diff] [blame] | 1097 | int __xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, |
| 1098 | unsigned int family, int reverse); |
Herbert Xu | d5422ef | 2007-12-12 10:44:16 -0800 | [diff] [blame] | 1099 | |
| 1100 | static inline int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, |
| 1101 | unsigned int family) |
| 1102 | { |
| 1103 | return __xfrm_decode_session(skb, fl, family, 0); |
| 1104 | } |
| 1105 | |
| 1106 | static inline int xfrm_decode_session_reverse(struct sk_buff *skb, |
| 1107 | struct flowi *fl, |
| 1108 | unsigned int family) |
| 1109 | { |
| 1110 | return __xfrm_decode_session(skb, fl, family, 1); |
| 1111 | } |
| 1112 | |
Joe Perches | d511337 | 2013-09-23 11:33:53 -0700 | [diff] [blame] | 1113 | int __xfrm_route_forward(struct sk_buff *skb, unsigned short family); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1114 | |
| 1115 | static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family) |
| 1116 | { |
Alexey Dobriyan | 99a6665 | 2008-11-25 17:36:13 -0800 | [diff] [blame] | 1117 | struct net *net = dev_net(skb->dev); |
| 1118 | |
| 1119 | return !net->xfrm.policy_count[XFRM_POLICY_OUT] || |
Eric Dumazet | adf3090 | 2009-06-02 05:19:30 +0000 | [diff] [blame] | 1120 | (skb_dst(skb)->flags & DST_NOXFRM) || |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1121 | __xfrm_route_forward(skb, family); |
| 1122 | } |
| 1123 | |
| 1124 | static inline int xfrm4_route_forward(struct sk_buff *skb) |
| 1125 | { |
| 1126 | return xfrm_route_forward(skb, AF_INET); |
| 1127 | } |
| 1128 | |
| 1129 | static inline int xfrm6_route_forward(struct sk_buff *skb) |
| 1130 | { |
| 1131 | return xfrm_route_forward(skb, AF_INET6); |
| 1132 | } |
| 1133 | |
Eric Dumazet | d188ba8 | 2015-12-08 07:22:02 -0800 | [diff] [blame] | 1134 | int __xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1135 | |
Eric Dumazet | d188ba8 | 2015-12-08 07:22:02 -0800 | [diff] [blame] | 1136 | static inline int xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1137 | { |
Eric Dumazet | d188ba8 | 2015-12-08 07:22:02 -0800 | [diff] [blame] | 1138 | sk->sk_policy[0] = NULL; |
| 1139 | sk->sk_policy[1] = NULL; |
| 1140 | if (unlikely(osk->sk_policy[0] || osk->sk_policy[1])) |
| 1141 | return __xfrm_sk_clone_policy(sk, osk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1142 | return 0; |
| 1143 | } |
| 1144 | |
Joe Perches | d511337 | 2013-09-23 11:33:53 -0700 | [diff] [blame] | 1145 | int xfrm_policy_delete(struct xfrm_policy *pol, int dir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1146 | |
| 1147 | static inline void xfrm_sk_free_policy(struct sock *sk) |
| 1148 | { |
Eric Dumazet | d188ba8 | 2015-12-08 07:22:02 -0800 | [diff] [blame] | 1149 | struct xfrm_policy *pol; |
| 1150 | |
| 1151 | pol = rcu_dereference_protected(sk->sk_policy[0], 1); |
| 1152 | if (unlikely(pol != NULL)) { |
| 1153 | xfrm_policy_delete(pol, XFRM_POLICY_MAX); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1154 | sk->sk_policy[0] = NULL; |
| 1155 | } |
Eric Dumazet | d188ba8 | 2015-12-08 07:22:02 -0800 | [diff] [blame] | 1156 | pol = rcu_dereference_protected(sk->sk_policy[1], 1); |
| 1157 | if (unlikely(pol != NULL)) { |
| 1158 | xfrm_policy_delete(pol, XFRM_POLICY_MAX+1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1159 | sk->sk_policy[1] = NULL; |
| 1160 | } |
| 1161 | } |
| 1162 | |
Joe Perches | d511337 | 2013-09-23 11:33:53 -0700 | [diff] [blame] | 1163 | void xfrm_garbage_collect(struct net *net); |
Paul Moore | e4c1721 | 2013-05-29 07:36:25 +0000 | [diff] [blame] | 1164 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1165 | #else |
| 1166 | |
| 1167 | static inline void xfrm_sk_free_policy(struct sock *sk) {} |
Eric Dumazet | d188ba8 | 2015-12-08 07:22:02 -0800 | [diff] [blame] | 1168 | static inline int xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk) { return 0; } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1169 | static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; } |
| 1170 | static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; } |
| 1171 | static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) |
| 1172 | { |
| 1173 | return 1; |
| 1174 | } |
| 1175 | static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) |
| 1176 | { |
| 1177 | return 1; |
| 1178 | } |
| 1179 | static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) |
| 1180 | { |
| 1181 | return 1; |
| 1182 | } |
Herbert Xu | d5422ef | 2007-12-12 10:44:16 -0800 | [diff] [blame] | 1183 | static inline int xfrm_decode_session_reverse(struct sk_buff *skb, |
| 1184 | struct flowi *fl, |
| 1185 | unsigned int family) |
| 1186 | { |
| 1187 | return -ENOSYS; |
| 1188 | } |
| 1189 | static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir, |
| 1190 | struct sk_buff *skb) |
| 1191 | { |
| 1192 | return 1; |
| 1193 | } |
| 1194 | static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir, |
| 1195 | struct sk_buff *skb) |
| 1196 | { |
| 1197 | return 1; |
| 1198 | } |
Paul Moore | e4c1721 | 2013-05-29 07:36:25 +0000 | [diff] [blame] | 1199 | static inline void xfrm_garbage_collect(struct net *net) |
| 1200 | { |
| 1201 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1202 | #endif |
| 1203 | |
| 1204 | static __inline__ |
David S. Miller | e8a4e37 | 2011-02-22 17:42:56 -0800 | [diff] [blame] | 1205 | 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] | 1206 | { |
| 1207 | switch (family){ |
| 1208 | case AF_INET: |
David S. Miller | 7e1dc7b | 2011-03-12 02:42:11 -0500 | [diff] [blame] | 1209 | return (xfrm_address_t *)&fl->u.ip4.daddr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1210 | case AF_INET6: |
David S. Miller | 7e1dc7b | 2011-03-12 02:42:11 -0500 | [diff] [blame] | 1211 | return (xfrm_address_t *)&fl->u.ip6.daddr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1212 | } |
| 1213 | return NULL; |
| 1214 | } |
| 1215 | |
| 1216 | static __inline__ |
David S. Miller | e8a4e37 | 2011-02-22 17:42:56 -0800 | [diff] [blame] | 1217 | 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] | 1218 | { |
| 1219 | switch (family){ |
| 1220 | case AF_INET: |
David S. Miller | 7e1dc7b | 2011-03-12 02:42:11 -0500 | [diff] [blame] | 1221 | return (xfrm_address_t *)&fl->u.ip4.saddr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1222 | case AF_INET6: |
David S. Miller | 7e1dc7b | 2011-03-12 02:42:11 -0500 | [diff] [blame] | 1223 | return (xfrm_address_t *)&fl->u.ip6.saddr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1224 | } |
| 1225 | return NULL; |
| 1226 | } |
| 1227 | |
YOSHIFUJI Hideaki | 9bb182a | 2008-02-22 14:48:22 +0900 | [diff] [blame] | 1228 | static __inline__ |
David S. Miller | e8a4e37 | 2011-02-22 17:42:56 -0800 | [diff] [blame] | 1229 | void xfrm_flowi_addr_get(const struct flowi *fl, |
YOSHIFUJI Hideaki | 9bb182a | 2008-02-22 14:48:22 +0900 | [diff] [blame] | 1230 | xfrm_address_t *saddr, xfrm_address_t *daddr, |
| 1231 | unsigned short family) |
| 1232 | { |
| 1233 | switch(family) { |
| 1234 | case AF_INET: |
David S. Miller | 7e1dc7b | 2011-03-12 02:42:11 -0500 | [diff] [blame] | 1235 | memcpy(&saddr->a4, &fl->u.ip4.saddr, sizeof(saddr->a4)); |
| 1236 | memcpy(&daddr->a4, &fl->u.ip4.daddr, sizeof(daddr->a4)); |
YOSHIFUJI Hideaki | 9bb182a | 2008-02-22 14:48:22 +0900 | [diff] [blame] | 1237 | break; |
| 1238 | case AF_INET6: |
Jiri Benc | 15e318b | 2015-03-29 16:59:24 +0200 | [diff] [blame] | 1239 | saddr->in6 = fl->u.ip6.saddr; |
| 1240 | daddr->in6 = fl->u.ip6.daddr; |
YOSHIFUJI Hideaki | 9bb182a | 2008-02-22 14:48:22 +0900 | [diff] [blame] | 1241 | break; |
| 1242 | } |
| 1243 | } |
| 1244 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1245 | static __inline__ int |
David S. Miller | f884806 | 2011-02-24 01:42:28 -0500 | [diff] [blame] | 1246 | __xfrm4_state_addr_check(const struct xfrm_state *x, |
| 1247 | const xfrm_address_t *daddr, const xfrm_address_t *saddr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1248 | { |
| 1249 | if (daddr->a4 == x->id.daddr.a4 && |
| 1250 | (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4)) |
| 1251 | return 1; |
| 1252 | return 0; |
| 1253 | } |
| 1254 | |
| 1255 | static __inline__ int |
David S. Miller | f884806 | 2011-02-24 01:42:28 -0500 | [diff] [blame] | 1256 | __xfrm6_state_addr_check(const struct xfrm_state *x, |
| 1257 | const xfrm_address_t *daddr, const xfrm_address_t *saddr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1258 | { |
YOSHIFUJI Hideaki / 吉藤英明 | ff88b30 | 2013-01-29 12:48:31 +0000 | [diff] [blame] | 1259 | if (ipv6_addr_equal((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) && |
| 1260 | (ipv6_addr_equal((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr) || |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1261 | ipv6_addr_any((struct in6_addr *)saddr) || |
| 1262 | ipv6_addr_any((struct in6_addr *)&x->props.saddr))) |
| 1263 | return 1; |
| 1264 | return 0; |
| 1265 | } |
| 1266 | |
| 1267 | static __inline__ int |
David S. Miller | f884806 | 2011-02-24 01:42:28 -0500 | [diff] [blame] | 1268 | xfrm_state_addr_check(const struct xfrm_state *x, |
| 1269 | const xfrm_address_t *daddr, const xfrm_address_t *saddr, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1270 | unsigned short family) |
| 1271 | { |
| 1272 | switch (family) { |
| 1273 | case AF_INET: |
| 1274 | return __xfrm4_state_addr_check(x, daddr, saddr); |
| 1275 | case AF_INET6: |
| 1276 | return __xfrm6_state_addr_check(x, daddr, saddr); |
| 1277 | } |
| 1278 | return 0; |
| 1279 | } |
| 1280 | |
Masahide NAKAMURA | e53820d | 2006-08-23 19:12:01 -0700 | [diff] [blame] | 1281 | static __inline__ int |
David S. Miller | f884806 | 2011-02-24 01:42:28 -0500 | [diff] [blame] | 1282 | 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] | 1283 | unsigned short family) |
| 1284 | { |
| 1285 | switch (family) { |
| 1286 | case AF_INET: |
| 1287 | return __xfrm4_state_addr_check(x, |
David S. Miller | 7e1dc7b | 2011-03-12 02:42:11 -0500 | [diff] [blame] | 1288 | (const xfrm_address_t *)&fl->u.ip4.daddr, |
| 1289 | (const xfrm_address_t *)&fl->u.ip4.saddr); |
Masahide NAKAMURA | e53820d | 2006-08-23 19:12:01 -0700 | [diff] [blame] | 1290 | case AF_INET6: |
| 1291 | return __xfrm6_state_addr_check(x, |
David S. Miller | 7e1dc7b | 2011-03-12 02:42:11 -0500 | [diff] [blame] | 1292 | (const xfrm_address_t *)&fl->u.ip6.daddr, |
| 1293 | (const xfrm_address_t *)&fl->u.ip6.saddr); |
Masahide NAKAMURA | e53820d | 2006-08-23 19:12:01 -0700 | [diff] [blame] | 1294 | } |
| 1295 | return 0; |
| 1296 | } |
| 1297 | |
David S. Miller | f884806 | 2011-02-24 01:42:28 -0500 | [diff] [blame] | 1298 | static inline int xfrm_state_kern(const struct xfrm_state *x) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1299 | { |
| 1300 | return atomic_read(&x->tunnel_users); |
| 1301 | } |
| 1302 | |
Masahide NAKAMURA | 5794708 | 2006-09-22 15:06:24 -0700 | [diff] [blame] | 1303 | static inline int xfrm_id_proto_match(u8 proto, u8 userproto) |
| 1304 | { |
Masahide NAKAMURA | dc00a52 | 2006-08-23 17:49:52 -0700 | [diff] [blame] | 1305 | return (!userproto || proto == userproto || |
| 1306 | (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH || |
| 1307 | proto == IPPROTO_ESP || |
| 1308 | proto == IPPROTO_COMP))); |
Masahide NAKAMURA | 5794708 | 2006-09-22 15:06:24 -0700 | [diff] [blame] | 1309 | } |
| 1310 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1311 | /* |
| 1312 | * xfrm algorithm information |
| 1313 | */ |
Herbert Xu | 1a6509d | 2008-01-28 19:37:29 -0800 | [diff] [blame] | 1314 | struct xfrm_algo_aead_info { |
Herbert Xu | 165ecc6 | 2015-05-27 16:03:44 +0800 | [diff] [blame] | 1315 | char *geniv; |
Herbert Xu | 1a6509d | 2008-01-28 19:37:29 -0800 | [diff] [blame] | 1316 | u16 icv_truncbits; |
| 1317 | }; |
| 1318 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1319 | struct xfrm_algo_auth_info { |
| 1320 | u16 icv_truncbits; |
| 1321 | u16 icv_fullbits; |
| 1322 | }; |
| 1323 | |
| 1324 | struct xfrm_algo_encr_info { |
Herbert Xu | 165ecc6 | 2015-05-27 16:03:44 +0800 | [diff] [blame] | 1325 | char *geniv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1326 | u16 blockbits; |
| 1327 | u16 defkeybits; |
| 1328 | }; |
| 1329 | |
| 1330 | struct xfrm_algo_comp_info { |
| 1331 | u16 threshold; |
| 1332 | }; |
| 1333 | |
| 1334 | struct xfrm_algo_desc { |
| 1335 | char *name; |
Herbert Xu | 04ff126 | 2006-08-13 08:50:00 +1000 | [diff] [blame] | 1336 | char *compat; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1337 | u8 available:1; |
Jussi Kivilinna | 7e50f84 | 2013-01-31 12:40:38 +0200 | [diff] [blame] | 1338 | u8 pfkey_supported:1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1339 | union { |
Herbert Xu | 1a6509d | 2008-01-28 19:37:29 -0800 | [diff] [blame] | 1340 | struct xfrm_algo_aead_info aead; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1341 | struct xfrm_algo_auth_info auth; |
| 1342 | struct xfrm_algo_encr_info encr; |
| 1343 | struct xfrm_algo_comp_info comp; |
| 1344 | } uinfo; |
| 1345 | struct sadb_alg desc; |
| 1346 | }; |
| 1347 | |
Steffen Klassert | 3328715 | 2014-02-21 08:41:08 +0100 | [diff] [blame] | 1348 | /* XFRM protocol handlers. */ |
| 1349 | struct xfrm4_protocol { |
| 1350 | int (*handler)(struct sk_buff *skb); |
| 1351 | int (*input_handler)(struct sk_buff *skb, int nexthdr, __be32 spi, |
| 1352 | int encap_type); |
| 1353 | int (*cb_handler)(struct sk_buff *skb, int err); |
| 1354 | int (*err_handler)(struct sk_buff *skb, u32 info); |
| 1355 | |
| 1356 | struct xfrm4_protocol __rcu *next; |
| 1357 | int priority; |
| 1358 | }; |
| 1359 | |
Steffen Klassert | 7e14ea1 | 2014-03-14 07:28:07 +0100 | [diff] [blame] | 1360 | struct xfrm6_protocol { |
| 1361 | int (*handler)(struct sk_buff *skb); |
| 1362 | int (*cb_handler)(struct sk_buff *skb, int err); |
| 1363 | int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt, |
| 1364 | u8 type, u8 code, int offset, __be32 info); |
| 1365 | |
| 1366 | struct xfrm6_protocol __rcu *next; |
| 1367 | int priority; |
| 1368 | }; |
| 1369 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1370 | /* XFRM tunnel handlers. */ |
| 1371 | struct xfrm_tunnel { |
| 1372 | int (*handler)(struct sk_buff *skb); |
jamal | a633746 | 2010-02-09 13:21:17 +0000 | [diff] [blame] | 1373 | int (*err_handler)(struct sk_buff *skb, u32 info); |
Herbert Xu | d2acc34 | 2006-03-28 01:12:13 -0800 | [diff] [blame] | 1374 | |
Eric Dumazet | b33eab0 | 2010-10-25 21:01:26 +0000 | [diff] [blame] | 1375 | struct xfrm_tunnel __rcu *next; |
Herbert Xu | d2acc34 | 2006-03-28 01:12:13 -0800 | [diff] [blame] | 1376 | int priority; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1377 | }; |
| 1378 | |
| 1379 | struct xfrm6_tunnel { |
Herbert Xu | d2acc34 | 2006-03-28 01:12:13 -0800 | [diff] [blame] | 1380 | int (*handler)(struct sk_buff *skb); |
| 1381 | int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt, |
Brian Haley | d5fdd6b | 2009-06-23 04:31:07 -0700 | [diff] [blame] | 1382 | u8 type, u8 code, int offset, __be32 info); |
Eric Dumazet | 6f0bcf1 | 2010-10-24 21:33:16 +0000 | [diff] [blame] | 1383 | struct xfrm6_tunnel __rcu *next; |
Herbert Xu | d2acc34 | 2006-03-28 01:12:13 -0800 | [diff] [blame] | 1384 | int priority; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1385 | }; |
| 1386 | |
Joe Perches | d511337 | 2013-09-23 11:33:53 -0700 | [diff] [blame] | 1387 | void xfrm_init(void); |
| 1388 | void xfrm4_init(void); |
| 1389 | int xfrm_state_init(struct net *net); |
| 1390 | void xfrm_state_fini(struct net *net); |
| 1391 | void xfrm4_state_init(void); |
Steffen Klassert | 2f32b51 | 2014-03-14 07:28:07 +0100 | [diff] [blame] | 1392 | void xfrm4_protocol_init(void); |
Daniel Lezcano | c35b7e7 | 2007-12-08 00:14:11 -0800 | [diff] [blame] | 1393 | #ifdef CONFIG_XFRM |
Joe Perches | d511337 | 2013-09-23 11:33:53 -0700 | [diff] [blame] | 1394 | int xfrm6_init(void); |
| 1395 | void xfrm6_fini(void); |
| 1396 | int xfrm6_state_init(void); |
| 1397 | void xfrm6_state_fini(void); |
Steffen Klassert | 7e14ea1 | 2014-03-14 07:28:07 +0100 | [diff] [blame] | 1398 | int xfrm6_protocol_init(void); |
| 1399 | void xfrm6_protocol_fini(void); |
Daniel Lezcano | c35b7e7 | 2007-12-08 00:14:11 -0800 | [diff] [blame] | 1400 | #else |
| 1401 | static inline int xfrm6_init(void) |
| 1402 | { |
| 1403 | return 0; |
| 1404 | } |
| 1405 | static inline void xfrm6_fini(void) |
| 1406 | { |
| 1407 | ; |
| 1408 | } |
| 1409 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1410 | |
Masahide NAKAMURA | 558f82e | 2007-12-20 20:42:57 -0800 | [diff] [blame] | 1411 | #ifdef CONFIG_XFRM_STATISTICS |
Joe Perches | d511337 | 2013-09-23 11:33:53 -0700 | [diff] [blame] | 1412 | int xfrm_proc_init(struct net *net); |
| 1413 | void xfrm_proc_fini(struct net *net); |
Masahide NAKAMURA | 558f82e | 2007-12-20 20:42:57 -0800 | [diff] [blame] | 1414 | #endif |
| 1415 | |
Joe Perches | d511337 | 2013-09-23 11:33:53 -0700 | [diff] [blame] | 1416 | int xfrm_sysctl_init(struct net *net); |
Alexey Dobriyan | b27aead | 2008-11-25 18:00:48 -0800 | [diff] [blame] | 1417 | #ifdef CONFIG_SYSCTL |
Joe Perches | d511337 | 2013-09-23 11:33:53 -0700 | [diff] [blame] | 1418 | void xfrm_sysctl_fini(struct net *net); |
Alexey Dobriyan | b27aead | 2008-11-25 18:00:48 -0800 | [diff] [blame] | 1419 | #else |
| 1420 | static inline void xfrm_sysctl_fini(struct net *net) |
| 1421 | { |
| 1422 | } |
| 1423 | #endif |
| 1424 | |
Nicolas Dichtel | d362309 | 2014-02-14 15:30:36 +0100 | [diff] [blame] | 1425 | void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto, |
Nicolas Dichtel | 870a2df | 2014-03-06 18:24:29 +0100 | [diff] [blame] | 1426 | struct xfrm_address_filter *filter); |
Joe Perches | d511337 | 2013-09-23 11:33:53 -0700 | [diff] [blame] | 1427 | int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk, |
| 1428 | int (*func)(struct xfrm_state *, int, void*), void *); |
Fan Du | 283bc9f | 2013-11-07 17:47:50 +0800 | [diff] [blame] | 1429 | void xfrm_state_walk_done(struct xfrm_state_walk *walk, struct net *net); |
Joe Perches | d511337 | 2013-09-23 11:33:53 -0700 | [diff] [blame] | 1430 | struct xfrm_state *xfrm_state_alloc(struct net *net); |
| 1431 | struct xfrm_state *xfrm_state_find(const xfrm_address_t *daddr, |
| 1432 | const xfrm_address_t *saddr, |
| 1433 | const struct flowi *fl, |
| 1434 | struct xfrm_tmpl *tmpl, |
| 1435 | struct xfrm_policy *pol, int *err, |
| 1436 | unsigned short family); |
| 1437 | struct xfrm_state *xfrm_stateonly_find(struct net *net, u32 mark, |
| 1438 | xfrm_address_t *daddr, |
| 1439 | xfrm_address_t *saddr, |
| 1440 | unsigned short family, |
| 1441 | u8 mode, u8 proto, u32 reqid); |
Fan Du | c454997 | 2014-01-03 11:18:32 +0800 | [diff] [blame] | 1442 | struct xfrm_state *xfrm_state_lookup_byspi(struct net *net, __be32 spi, |
| 1443 | unsigned short family); |
Joe Perches | d511337 | 2013-09-23 11:33:53 -0700 | [diff] [blame] | 1444 | int xfrm_state_check_expire(struct xfrm_state *x); |
| 1445 | void xfrm_state_insert(struct xfrm_state *x); |
| 1446 | int xfrm_state_add(struct xfrm_state *x); |
| 1447 | int xfrm_state_update(struct xfrm_state *x); |
| 1448 | struct xfrm_state *xfrm_state_lookup(struct net *net, u32 mark, |
| 1449 | const xfrm_address_t *daddr, __be32 spi, |
| 1450 | u8 proto, unsigned short family); |
| 1451 | struct xfrm_state *xfrm_state_lookup_byaddr(struct net *net, u32 mark, |
| 1452 | const xfrm_address_t *daddr, |
| 1453 | const xfrm_address_t *saddr, |
| 1454 | u8 proto, |
| 1455 | unsigned short family); |
Masahide NAKAMURA | 41a49cc | 2006-08-23 22:48:31 -0700 | [diff] [blame] | 1456 | #ifdef CONFIG_XFRM_SUB_POLICY |
Joe Perches | d511337 | 2013-09-23 11:33:53 -0700 | [diff] [blame] | 1457 | int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n, |
Fan Du | 283bc9f | 2013-11-07 17:47:50 +0800 | [diff] [blame] | 1458 | unsigned short family, struct net *net); |
Joe Perches | d511337 | 2013-09-23 11:33:53 -0700 | [diff] [blame] | 1459 | int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, int n, |
| 1460 | unsigned short family); |
Masahide NAKAMURA | 41a49cc | 2006-08-23 22:48:31 -0700 | [diff] [blame] | 1461 | #else |
| 1462 | static inline int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, |
Fan Du | 283bc9f | 2013-11-07 17:47:50 +0800 | [diff] [blame] | 1463 | int n, unsigned short family, struct net *net) |
Masahide NAKAMURA | 41a49cc | 2006-08-23 22:48:31 -0700 | [diff] [blame] | 1464 | { |
| 1465 | return -ENOSYS; |
| 1466 | } |
| 1467 | |
| 1468 | static inline int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, |
| 1469 | int n, unsigned short family) |
| 1470 | { |
| 1471 | return -ENOSYS; |
| 1472 | } |
| 1473 | #endif |
Jamal Hadi Salim | af11e31 | 2007-05-04 12:55:13 -0700 | [diff] [blame] | 1474 | |
| 1475 | struct xfrmk_sadinfo { |
| 1476 | u32 sadhcnt; /* current hash bkts */ |
| 1477 | u32 sadhmcnt; /* max allowed hash bkts */ |
| 1478 | u32 sadcnt; /* current running count */ |
| 1479 | }; |
| 1480 | |
Jamal Hadi Salim | 5a6d341 | 2007-05-04 12:55:39 -0700 | [diff] [blame] | 1481 | struct xfrmk_spdinfo { |
| 1482 | u32 incnt; |
| 1483 | u32 outcnt; |
| 1484 | u32 fwdcnt; |
| 1485 | u32 inscnt; |
| 1486 | u32 outscnt; |
| 1487 | u32 fwdscnt; |
| 1488 | u32 spdhcnt; |
| 1489 | u32 spdhmcnt; |
| 1490 | }; |
| 1491 | |
Joe Perches | d511337 | 2013-09-23 11:33:53 -0700 | [diff] [blame] | 1492 | struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq); |
| 1493 | int xfrm_state_delete(struct xfrm_state *x); |
Tetsuo Handa | 2e71029 | 2014-04-22 21:48:30 +0900 | [diff] [blame] | 1494 | int xfrm_state_flush(struct net *net, u8 proto, bool task_valid); |
Joe Perches | d511337 | 2013-09-23 11:33:53 -0700 | [diff] [blame] | 1495 | void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si); |
| 1496 | void xfrm_spd_getinfo(struct net *net, struct xfrmk_spdinfo *si); |
| 1497 | u32 xfrm_replay_seqhi(struct xfrm_state *x, __be32 net_seq); |
| 1498 | int xfrm_init_replay(struct xfrm_state *x); |
| 1499 | int xfrm_state_mtu(struct xfrm_state *x, int mtu); |
| 1500 | int __xfrm_init_state(struct xfrm_state *x, bool init_replay); |
| 1501 | int xfrm_init_state(struct xfrm_state *x); |
| 1502 | int xfrm_prepare_input(struct xfrm_state *x, struct sk_buff *skb); |
| 1503 | int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type); |
| 1504 | int xfrm_input_resume(struct sk_buff *skb, int nexthdr); |
| 1505 | int xfrm_output_resume(struct sk_buff *skb, int err); |
David Miller | 7026b1d | 2015-04-05 22:19:04 -0400 | [diff] [blame] | 1506 | int xfrm_output(struct sock *sk, struct sk_buff *skb); |
Joe Perches | d511337 | 2013-09-23 11:33:53 -0700 | [diff] [blame] | 1507 | int xfrm_inner_extract_output(struct xfrm_state *x, struct sk_buff *skb); |
| 1508 | void xfrm_local_error(struct sk_buff *skb, int mtu); |
| 1509 | int xfrm4_extract_header(struct sk_buff *skb); |
| 1510 | int xfrm4_extract_input(struct xfrm_state *x, struct sk_buff *skb); |
| 1511 | int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi, |
| 1512 | int encap_type); |
| 1513 | int xfrm4_transport_finish(struct sk_buff *skb, int async); |
| 1514 | int xfrm4_rcv(struct sk_buff *skb); |
Herbert Xu | c4541b4 | 2007-10-17 21:28:53 -0700 | [diff] [blame] | 1515 | |
| 1516 | static inline int xfrm4_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi) |
| 1517 | { |
Steffen Klassert | 70be6c9 | 2014-02-21 08:41:09 +0100 | [diff] [blame] | 1518 | XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4 = NULL; |
Steffen Klassert | 3328715 | 2014-02-21 08:41:08 +0100 | [diff] [blame] | 1519 | XFRM_SPI_SKB_CB(skb)->family = AF_INET; |
| 1520 | XFRM_SPI_SKB_CB(skb)->daddroff = offsetof(struct iphdr, daddr); |
| 1521 | return xfrm_input(skb, nexthdr, spi, 0); |
Herbert Xu | c4541b4 | 2007-10-17 21:28:53 -0700 | [diff] [blame] | 1522 | } |
| 1523 | |
Joe Perches | d511337 | 2013-09-23 11:33:53 -0700 | [diff] [blame] | 1524 | int xfrm4_extract_output(struct xfrm_state *x, struct sk_buff *skb); |
| 1525 | int xfrm4_prepare_output(struct xfrm_state *x, struct sk_buff *skb); |
Eric W. Biederman | ede2059 | 2015-10-07 16:48:47 -0500 | [diff] [blame] | 1526 | int xfrm4_output(struct net *net, struct sock *sk, struct sk_buff *skb); |
David Miller | 7026b1d | 2015-04-05 22:19:04 -0400 | [diff] [blame] | 1527 | int xfrm4_output_finish(struct sock *sk, struct sk_buff *skb); |
Steffen Klassert | 3328715 | 2014-02-21 08:41:08 +0100 | [diff] [blame] | 1528 | int xfrm4_rcv_cb(struct sk_buff *skb, u8 protocol, int err); |
| 1529 | int xfrm4_protocol_register(struct xfrm4_protocol *handler, unsigned char protocol); |
| 1530 | int xfrm4_protocol_deregister(struct xfrm4_protocol *handler, unsigned char protocol); |
Joe Perches | d511337 | 2013-09-23 11:33:53 -0700 | [diff] [blame] | 1531 | int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family); |
| 1532 | int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family); |
Joe Perches | d511337 | 2013-09-23 11:33:53 -0700 | [diff] [blame] | 1533 | void xfrm4_local_error(struct sk_buff *skb, u32 mtu); |
| 1534 | int xfrm6_extract_header(struct sk_buff *skb); |
| 1535 | int xfrm6_extract_input(struct xfrm_state *x, struct sk_buff *skb); |
Nicolas Dichtel | 63c4378 | 2016-09-19 16:17:57 +0200 | [diff] [blame] | 1536 | int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi, |
| 1537 | struct ip6_tnl *t); |
Joe Perches | d511337 | 2013-09-23 11:33:53 -0700 | [diff] [blame] | 1538 | int xfrm6_transport_finish(struct sk_buff *skb, int async); |
Nicolas Dichtel | 63c4378 | 2016-09-19 16:17:57 +0200 | [diff] [blame] | 1539 | int xfrm6_rcv_tnl(struct sk_buff *skb, struct ip6_tnl *t); |
Joe Perches | d511337 | 2013-09-23 11:33:53 -0700 | [diff] [blame] | 1540 | int xfrm6_rcv(struct sk_buff *skb); |
| 1541 | int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr, |
| 1542 | xfrm_address_t *saddr, u8 proto); |
David S. Miller | 7b77d16 | 2013-09-30 15:11:00 -0400 | [diff] [blame] | 1543 | void xfrm6_local_error(struct sk_buff *skb, u32 mtu); |
Steffen Klassert | 7e14ea1 | 2014-03-14 07:28:07 +0100 | [diff] [blame] | 1544 | int xfrm6_rcv_cb(struct sk_buff *skb, u8 protocol, int err); |
| 1545 | int xfrm6_protocol_register(struct xfrm6_protocol *handler, unsigned char protocol); |
| 1546 | int xfrm6_protocol_deregister(struct xfrm6_protocol *handler, unsigned char protocol); |
Joe Perches | d511337 | 2013-09-23 11:33:53 -0700 | [diff] [blame] | 1547 | int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family); |
David S. Miller | 7b77d16 | 2013-09-30 15:11:00 -0400 | [diff] [blame] | 1548 | int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family); |
Joe Perches | d511337 | 2013-09-23 11:33:53 -0700 | [diff] [blame] | 1549 | __be32 xfrm6_tunnel_alloc_spi(struct net *net, xfrm_address_t *saddr); |
| 1550 | __be32 xfrm6_tunnel_spi_lookup(struct net *net, const xfrm_address_t *saddr); |
| 1551 | int xfrm6_extract_output(struct xfrm_state *x, struct sk_buff *skb); |
| 1552 | int xfrm6_prepare_output(struct xfrm_state *x, struct sk_buff *skb); |
Eric W. Biederman | ede2059 | 2015-10-07 16:48:47 -0500 | [diff] [blame] | 1553 | int xfrm6_output(struct net *net, struct sock *sk, struct sk_buff *skb); |
David Miller | 7026b1d | 2015-04-05 22:19:04 -0400 | [diff] [blame] | 1554 | int xfrm6_output_finish(struct sock *sk, struct sk_buff *skb); |
Joe Perches | d511337 | 2013-09-23 11:33:53 -0700 | [diff] [blame] | 1555 | int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb, |
| 1556 | u8 **prevhdr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1557 | |
| 1558 | #ifdef CONFIG_XFRM |
Joe Perches | d511337 | 2013-09-23 11:33:53 -0700 | [diff] [blame] | 1559 | int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb); |
| 1560 | int xfrm_user_policy(struct sock *sk, int optname, |
| 1561 | u8 __user *optval, int optlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1562 | #else |
| 1563 | static inline int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen) |
| 1564 | { |
| 1565 | return -ENOPROTOOPT; |
| 1566 | } |
| 1567 | |
James Chapman | 067b207 | 2007-07-05 17:08:05 -0700 | [diff] [blame] | 1568 | 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] | 1569 | { |
| 1570 | /* should not happen */ |
| 1571 | kfree_skb(skb); |
| 1572 | return 0; |
| 1573 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1574 | #endif |
| 1575 | |
Alexey Dobriyan | 0331b1f | 2008-11-25 17:21:45 -0800 | [diff] [blame] | 1576 | struct xfrm_policy *xfrm_policy_alloc(struct net *net, gfp_t gfp); |
Timo Teras | 4c563f7 | 2008-02-28 21:31:08 -0800 | [diff] [blame] | 1577 | |
Joe Perches | d511337 | 2013-09-23 11:33:53 -0700 | [diff] [blame] | 1578 | void xfrm_policy_walk_init(struct xfrm_policy_walk *walk, u8 type); |
| 1579 | int xfrm_policy_walk(struct net *net, struct xfrm_policy_walk *walk, |
| 1580 | int (*func)(struct xfrm_policy *, int, int, void*), |
| 1581 | void *); |
Fan Du | 283bc9f | 2013-11-07 17:47:50 +0800 | [diff] [blame] | 1582 | void xfrm_policy_walk_done(struct xfrm_policy_walk *walk, struct net *net); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1583 | 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] | 1584 | struct xfrm_policy *xfrm_policy_bysel_ctx(struct net *net, u32 mark, |
| 1585 | u8 type, int dir, |
Masahide NAKAMURA | 4e81bb8 | 2006-08-23 22:43:30 -0700 | [diff] [blame] | 1586 | struct xfrm_selector *sel, |
Eric Paris | ef41aaa | 2007-03-07 15:37:58 -0800 | [diff] [blame] | 1587 | struct xfrm_sec_ctx *ctx, int delete, |
| 1588 | int *err); |
Joe Perches | d511337 | 2013-09-23 11:33:53 -0700 | [diff] [blame] | 1589 | struct xfrm_policy *xfrm_policy_byid(struct net *net, u32 mark, u8, int dir, |
| 1590 | u32 id, int delete, int *err); |
Tetsuo Handa | 2e71029 | 2014-04-22 21:48:30 +0900 | [diff] [blame] | 1591 | int xfrm_policy_flush(struct net *net, u8 type, bool task_valid); |
Christophe Gouault | 880a6fa | 2014-08-29 16:16:05 +0200 | [diff] [blame] | 1592 | void xfrm_policy_hash_rebuild(struct net *net); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1593 | u32 xfrm_get_acqseq(void); |
Fan Du | 776e9dd | 2013-12-16 18:47:49 +0800 | [diff] [blame] | 1594 | int verify_spi_info(u8 proto, u32 min, u32 max); |
Joe Perches | d511337 | 2013-09-23 11:33:53 -0700 | [diff] [blame] | 1595 | int xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi); |
Mathias Krause | e473fcb | 2013-06-26 23:56:58 +0200 | [diff] [blame] | 1596 | struct xfrm_state *xfrm_find_acq(struct net *net, const struct xfrm_mark *mark, |
Jamal Hadi Salim | bd55775 | 2010-02-22 16:20:22 -0800 | [diff] [blame] | 1597 | u8 mode, u32 reqid, u8 proto, |
David S. Miller | a70486f | 2011-02-27 23:17:24 -0800 | [diff] [blame] | 1598 | const xfrm_address_t *daddr, |
| 1599 | const xfrm_address_t *saddr, int create, |
Jamal Hadi Salim | bd55775 | 2010-02-22 16:20:22 -0800 | [diff] [blame] | 1600 | unsigned short family); |
Joe Perches | d511337 | 2013-09-23 11:33:53 -0700 | [diff] [blame] | 1601 | 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] | 1602 | |
Shinta Sugimoto | 80c9aba | 2007-02-08 13:11:42 -0800 | [diff] [blame] | 1603 | #ifdef CONFIG_XFRM_MIGRATE |
Joe Perches | d511337 | 2013-09-23 11:33:53 -0700 | [diff] [blame] | 1604 | int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, |
| 1605 | const struct xfrm_migrate *m, int num_bundles, |
| 1606 | const struct xfrm_kmaddress *k); |
Fan Du | 283bc9f | 2013-11-07 17:47:50 +0800 | [diff] [blame] | 1607 | struct xfrm_state *xfrm_migrate_state_find(struct xfrm_migrate *m, struct net *net); |
Joe Perches | d511337 | 2013-09-23 11:33:53 -0700 | [diff] [blame] | 1608 | struct xfrm_state *xfrm_state_migrate(struct xfrm_state *x, |
| 1609 | struct xfrm_migrate *m); |
| 1610 | int xfrm_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, |
| 1611 | struct xfrm_migrate *m, int num_bundles, |
Fan Du | 8d549c4 | 2013-11-07 17:47:49 +0800 | [diff] [blame] | 1612 | struct xfrm_kmaddress *k, struct net *net); |
Shinta Sugimoto | 80c9aba | 2007-02-08 13:11:42 -0800 | [diff] [blame] | 1613 | #endif |
| 1614 | |
Joe Perches | d511337 | 2013-09-23 11:33:53 -0700 | [diff] [blame] | 1615 | int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); |
| 1616 | void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 portid); |
| 1617 | int km_report(struct net *net, u8 proto, struct xfrm_selector *sel, |
| 1618 | xfrm_address_t *addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1619 | |
Joe Perches | d511337 | 2013-09-23 11:33:53 -0700 | [diff] [blame] | 1620 | void xfrm_input_init(void); |
| 1621 | 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] | 1622 | |
Joe Perches | d511337 | 2013-09-23 11:33:53 -0700 | [diff] [blame] | 1623 | void xfrm_probe_algs(void); |
| 1624 | int xfrm_count_pfkey_auth_supported(void); |
| 1625 | int xfrm_count_pfkey_enc_supported(void); |
| 1626 | struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx); |
| 1627 | struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx); |
| 1628 | struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id); |
| 1629 | struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id); |
| 1630 | struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id); |
| 1631 | struct xfrm_algo_desc *xfrm_aalg_get_byname(const char *name, int probe); |
| 1632 | struct xfrm_algo_desc *xfrm_ealg_get_byname(const char *name, int probe); |
| 1633 | struct xfrm_algo_desc *xfrm_calg_get_byname(const char *name, int probe); |
| 1634 | struct xfrm_algo_desc *xfrm_aead_get_byname(const char *name, int icv_len, |
| 1635 | int probe); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1636 | |
YOSHIFUJI Hideaki / 吉藤英明 | ff88b30 | 2013-01-29 12:48:31 +0000 | [diff] [blame] | 1637 | static inline bool xfrm6_addr_equal(const xfrm_address_t *a, |
| 1638 | const xfrm_address_t *b) |
| 1639 | { |
| 1640 | return ipv6_addr_equal((const struct in6_addr *)a, |
| 1641 | (const struct in6_addr *)b); |
| 1642 | } |
| 1643 | |
YOSHIFUJI Hideaki / 吉藤英明 | 70e94e6 | 2013-01-29 12:48:50 +0000 | [diff] [blame] | 1644 | static inline bool xfrm_addr_equal(const xfrm_address_t *a, |
| 1645 | const xfrm_address_t *b, |
| 1646 | sa_family_t family) |
| 1647 | { |
| 1648 | switch (family) { |
| 1649 | default: |
| 1650 | case AF_INET: |
| 1651 | return ((__force u32)a->a4 ^ (__force u32)b->a4) == 0; |
| 1652 | case AF_INET6: |
| 1653 | return xfrm6_addr_equal(a, b); |
| 1654 | } |
| 1655 | } |
| 1656 | |
Herbert Xu | 77d8d7a | 2005-10-05 12:15:12 -0700 | [diff] [blame] | 1657 | static inline int xfrm_policy_id2dir(u32 index) |
| 1658 | { |
| 1659 | return index & 7; |
| 1660 | } |
| 1661 | |
Alexey Dobriyan | a6483b7 | 2008-11-25 17:38:20 -0800 | [diff] [blame] | 1662 | #ifdef CONFIG_XFRM |
| 1663 | static inline int xfrm_aevent_is_on(struct net *net) |
Jamal Hadi Salim | f8cd548 | 2006-03-20 19:15:11 -0800 | [diff] [blame] | 1664 | { |
Patrick McHardy | be33690 | 2006-03-20 22:40:54 -0800 | [diff] [blame] | 1665 | struct sock *nlsk; |
| 1666 | int ret = 0; |
| 1667 | |
| 1668 | rcu_read_lock(); |
Alexey Dobriyan | a6483b7 | 2008-11-25 17:38:20 -0800 | [diff] [blame] | 1669 | nlsk = rcu_dereference(net->xfrm.nlsk); |
Patrick McHardy | be33690 | 2006-03-20 22:40:54 -0800 | [diff] [blame] | 1670 | if (nlsk) |
| 1671 | ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS); |
| 1672 | rcu_read_unlock(); |
| 1673 | return ret; |
Jamal Hadi Salim | f8cd548 | 2006-03-20 19:15:11 -0800 | [diff] [blame] | 1674 | } |
Horia Geanta | 0f24558 | 2014-02-12 16:20:06 +0200 | [diff] [blame] | 1675 | |
| 1676 | static inline int xfrm_acquire_is_on(struct net *net) |
| 1677 | { |
| 1678 | struct sock *nlsk; |
| 1679 | int ret = 0; |
| 1680 | |
| 1681 | rcu_read_lock(); |
| 1682 | nlsk = rcu_dereference(net->xfrm.nlsk); |
| 1683 | if (nlsk) |
| 1684 | ret = netlink_has_listeners(nlsk, XFRMNLGRP_ACQUIRE); |
| 1685 | rcu_read_unlock(); |
| 1686 | |
| 1687 | return ret; |
| 1688 | } |
Alexey Dobriyan | a6483b7 | 2008-11-25 17:38:20 -0800 | [diff] [blame] | 1689 | #endif |
Jamal Hadi Salim | f8cd548 | 2006-03-20 19:15:11 -0800 | [diff] [blame] | 1690 | |
Steffen Klassert | ee5c231 | 2014-02-19 13:33:24 +0100 | [diff] [blame] | 1691 | static inline int aead_len(struct xfrm_algo_aead *alg) |
| 1692 | { |
| 1693 | return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); |
| 1694 | } |
| 1695 | |
David S. Miller | 8515862 | 2011-02-27 23:07:02 -0800 | [diff] [blame] | 1696 | static inline int xfrm_alg_len(const struct xfrm_algo *alg) |
Eric Dumazet | 0f99be0 | 2008-01-08 23:39:06 -0800 | [diff] [blame] | 1697 | { |
| 1698 | return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); |
| 1699 | } |
| 1700 | |
David S. Miller | 8515862 | 2011-02-27 23:07:02 -0800 | [diff] [blame] | 1701 | 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] | 1702 | { |
| 1703 | return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); |
| 1704 | } |
| 1705 | |
Steffen Klassert | 9736acf | 2011-03-08 00:05:43 +0000 | [diff] [blame] | 1706 | static inline int xfrm_replay_state_esn_len(struct xfrm_replay_state_esn *replay_esn) |
| 1707 | { |
| 1708 | return sizeof(*replay_esn) + replay_esn->bmp_len * sizeof(__u32); |
| 1709 | } |
| 1710 | |
Shinta Sugimoto | 80c9aba | 2007-02-08 13:11:42 -0800 | [diff] [blame] | 1711 | #ifdef CONFIG_XFRM_MIGRATE |
Steffen Klassert | af2f464 | 2011-03-28 19:46:39 +0000 | [diff] [blame] | 1712 | static inline int xfrm_replay_clone(struct xfrm_state *x, |
| 1713 | struct xfrm_state *orig) |
| 1714 | { |
| 1715 | x->replay_esn = kzalloc(xfrm_replay_state_esn_len(orig->replay_esn), |
| 1716 | GFP_KERNEL); |
| 1717 | if (!x->replay_esn) |
| 1718 | return -ENOMEM; |
| 1719 | |
| 1720 | x->replay_esn->bmp_len = orig->replay_esn->bmp_len; |
| 1721 | x->replay_esn->replay_window = orig->replay_esn->replay_window; |
| 1722 | |
| 1723 | x->preplay_esn = kmemdup(x->replay_esn, |
| 1724 | xfrm_replay_state_esn_len(x->replay_esn), |
| 1725 | GFP_KERNEL); |
| 1726 | if (!x->preplay_esn) { |
| 1727 | kfree(x->replay_esn); |
| 1728 | return -ENOMEM; |
| 1729 | } |
| 1730 | |
| 1731 | return 0; |
| 1732 | } |
| 1733 | |
Steffen Klassert | ee5c231 | 2014-02-19 13:33:24 +0100 | [diff] [blame] | 1734 | static inline struct xfrm_algo_aead *xfrm_algo_aead_clone(struct xfrm_algo_aead *orig) |
| 1735 | { |
| 1736 | return kmemdup(orig, aead_len(orig), GFP_KERNEL); |
| 1737 | } |
| 1738 | |
| 1739 | |
Shinta Sugimoto | 80c9aba | 2007-02-08 13:11:42 -0800 | [diff] [blame] | 1740 | static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig) |
| 1741 | { |
Eric Dumazet | 0f99be0 | 2008-01-08 23:39:06 -0800 | [diff] [blame] | 1742 | return kmemdup(orig, xfrm_alg_len(orig), GFP_KERNEL); |
Shinta Sugimoto | 80c9aba | 2007-02-08 13:11:42 -0800 | [diff] [blame] | 1743 | } |
| 1744 | |
Martin Willi | 4447bb3 | 2009-11-25 00:29:52 +0000 | [diff] [blame] | 1745 | static inline struct xfrm_algo_auth *xfrm_algo_auth_clone(struct xfrm_algo_auth *orig) |
| 1746 | { |
| 1747 | return kmemdup(orig, xfrm_alg_auth_len(orig), GFP_KERNEL); |
| 1748 | } |
| 1749 | |
Shinta Sugimoto | 80c9aba | 2007-02-08 13:11:42 -0800 | [diff] [blame] | 1750 | static inline void xfrm_states_put(struct xfrm_state **states, int n) |
| 1751 | { |
| 1752 | int i; |
| 1753 | for (i = 0; i < n; i++) |
| 1754 | xfrm_state_put(*(states + i)); |
| 1755 | } |
| 1756 | |
| 1757 | static inline void xfrm_states_delete(struct xfrm_state **states, int n) |
| 1758 | { |
| 1759 | int i; |
| 1760 | for (i = 0; i < n; i++) |
| 1761 | xfrm_state_delete(*(states + i)); |
| 1762 | } |
| 1763 | #endif |
Jamal Hadi Salim | f8cd548 | 2006-03-20 19:15:11 -0800 | [diff] [blame] | 1764 | |
Alexey Dobriyan | def8b4f | 2008-10-28 13:24:06 -0700 | [diff] [blame] | 1765 | #ifdef CONFIG_XFRM |
Herbert Xu | 0050112 | 2007-12-11 01:53:43 -0800 | [diff] [blame] | 1766 | static inline struct xfrm_state *xfrm_input_state(struct sk_buff *skb) |
| 1767 | { |
| 1768 | return skb->sp->xvec[skb->sp->len - 1]; |
| 1769 | } |
Alexey Dobriyan | def8b4f | 2008-10-28 13:24:06 -0700 | [diff] [blame] | 1770 | #endif |
Herbert Xu | 0050112 | 2007-12-11 01:53:43 -0800 | [diff] [blame] | 1771 | |
Jamal Hadi Salim | bf825f81 | 2010-02-22 11:32:54 +0000 | [diff] [blame] | 1772 | static inline int xfrm_mark_get(struct nlattr **attrs, struct xfrm_mark *m) |
| 1773 | { |
| 1774 | if (attrs[XFRMA_MARK]) |
Andreas Steffen | 4efd7e8 | 2010-06-30 10:41:15 -0700 | [diff] [blame] | 1775 | memcpy(m, nla_data(attrs[XFRMA_MARK]), sizeof(struct xfrm_mark)); |
Jamal Hadi Salim | bf825f81 | 2010-02-22 11:32:54 +0000 | [diff] [blame] | 1776 | else |
| 1777 | m->v = m->m = 0; |
| 1778 | |
| 1779 | return m->v & m->m; |
| 1780 | } |
| 1781 | |
David S. Miller | e3dfa38 | 2011-02-27 23:20:19 -0800 | [diff] [blame] | 1782 | 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] | 1783 | { |
David S. Miller | 1d1e34d | 2012-06-27 21:57:03 -0700 | [diff] [blame] | 1784 | int ret = 0; |
Jamal Hadi Salim | bf825f81 | 2010-02-22 11:32:54 +0000 | [diff] [blame] | 1785 | |
David S. Miller | 1d1e34d | 2012-06-27 21:57:03 -0700 | [diff] [blame] | 1786 | if (m->m | m->v) |
| 1787 | ret = nla_put(skb, XFRMA_MARK, sizeof(struct xfrm_mark), m); |
| 1788 | return ret; |
Jamal Hadi Salim | bf825f81 | 2010-02-22 11:32:54 +0000 | [diff] [blame] | 1789 | } |
| 1790 | |
Steffen Klassert | 70be6c9 | 2014-02-21 08:41:09 +0100 | [diff] [blame] | 1791 | static inline int xfrm_tunnel_check(struct sk_buff *skb, struct xfrm_state *x, |
| 1792 | unsigned int family) |
| 1793 | { |
| 1794 | bool tunnel = false; |
| 1795 | |
| 1796 | switch(family) { |
| 1797 | case AF_INET: |
| 1798 | if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4) |
| 1799 | tunnel = true; |
| 1800 | break; |
| 1801 | case AF_INET6: |
| 1802 | if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip6) |
| 1803 | tunnel = true; |
| 1804 | break; |
| 1805 | } |
| 1806 | if (tunnel && !(x->outer_mode->flags & XFRM_MODE_FLAG_TUNNEL)) |
| 1807 | return -EINVAL; |
| 1808 | |
| 1809 | return 0; |
| 1810 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1811 | #endif /* _NET_XFRM_H */ |