11da177e4SLinus Torvalds #ifndef _NET_XFRM_H 21da177e4SLinus Torvalds #define _NET_XFRM_H 31da177e4SLinus Torvalds 4aabc9761SHerbert Xu #include <linux/compiler.h> 51da177e4SLinus Torvalds #include <linux/xfrm.h> 61da177e4SLinus Torvalds #include <linux/spinlock.h> 71da177e4SLinus Torvalds #include <linux/list.h> 81da177e4SLinus Torvalds #include <linux/skbuff.h> 914c85021SArnaldo Carvalho de Melo #include <linux/socket.h> 101da177e4SLinus Torvalds #include <linux/pfkeyv2.h> 115794708fSMasahide NAKAMURA #include <linux/ipsec.h> 121da177e4SLinus Torvalds #include <linux/in6.h> 134a3e2f71SArjan van de Ven #include <linux/mutex.h> 14ab5f5e8bSJoy Latten #include <linux/audit.h> 151da177e4SLinus Torvalds 161da177e4SLinus Torvalds #include <net/sock.h> 171da177e4SLinus Torvalds #include <net/dst.h> 18436a0a40SHerbert Xu #include <net/ip.h> 191da177e4SLinus Torvalds #include <net/route.h> 201da177e4SLinus Torvalds #include <net/ipv6.h> 211da177e4SLinus Torvalds #include <net/ip6_fib.h> 22558f82efSMasahide NAKAMURA #ifdef CONFIG_XFRM_STATISTICS 23558f82efSMasahide NAKAMURA #include <net/snmp.h> 24558f82efSMasahide NAKAMURA #endif 251da177e4SLinus Torvalds 26d3d6dd3aSMasahide NAKAMURA #define XFRM_PROTO_ESP 50 27d3d6dd3aSMasahide NAKAMURA #define XFRM_PROTO_AH 51 28d3d6dd3aSMasahide NAKAMURA #define XFRM_PROTO_COMP 108 29d3d6dd3aSMasahide NAKAMURA #define XFRM_PROTO_IPIP 4 30d3d6dd3aSMasahide NAKAMURA #define XFRM_PROTO_IPV6 41 31d3d6dd3aSMasahide NAKAMURA #define XFRM_PROTO_ROUTING IPPROTO_ROUTING 32d3d6dd3aSMasahide NAKAMURA #define XFRM_PROTO_DSTOPTS IPPROTO_DSTOPTS 33d3d6dd3aSMasahide NAKAMURA 341da177e4SLinus Torvalds #define XFRM_ALIGN8(len) (((len) + 7) & ~7) 35b59f45d0SHerbert Xu #define MODULE_ALIAS_XFRM_MODE(family, encap) \ 36b59f45d0SHerbert Xu MODULE_ALIAS("xfrm-mode-" __stringify(family) "-" __stringify(encap)) 37d3d6dd3aSMasahide NAKAMURA #define MODULE_ALIAS_XFRM_TYPE(family, proto) \ 38d3d6dd3aSMasahide NAKAMURA MODULE_ALIAS("xfrm-type-" __stringify(family) "-" __stringify(proto)) 391da177e4SLinus Torvalds 40558f82efSMasahide NAKAMURA #ifdef CONFIG_XFRM_STATISTICS 41558f82efSMasahide NAKAMURA DECLARE_SNMP_STAT(struct linux_xfrm_mib, xfrm_statistics); 42558f82efSMasahide NAKAMURA #define XFRM_INC_STATS(field) SNMP_INC_STATS(xfrm_statistics, field) 43558f82efSMasahide NAKAMURA #define XFRM_INC_STATS_BH(field) SNMP_INC_STATS_BH(xfrm_statistics, field) 44558f82efSMasahide NAKAMURA #define XFRM_INC_STATS_USER(field) SNMP_INC_STATS_USER(xfrm_statistics, field) 45558f82efSMasahide NAKAMURA #else 46558f82efSMasahide NAKAMURA #define XFRM_INC_STATS(field) 47558f82efSMasahide NAKAMURA #define XFRM_INC_STATS_BH(field) 48558f82efSMasahide NAKAMURA #define XFRM_INC_STATS_USER(field) 49558f82efSMasahide NAKAMURA #endif 50558f82efSMasahide NAKAMURA 51f8cd5488SJamal Hadi Salim extern struct sock *xfrm_nl; 52f8cd5488SJamal Hadi Salim extern u32 sysctl_xfrm_aevent_etime; 53f8cd5488SJamal Hadi Salim extern u32 sysctl_xfrm_aevent_rseqth; 54a37ae408SPavel Emelyanov extern int sysctl_xfrm_larval_drop; 55a37ae408SPavel Emelyanov extern u32 sysctl_xfrm_acq_expires; 56f8cd5488SJamal Hadi Salim 574a3e2f71SArjan van de Ven extern struct mutex xfrm_cfg_mutex; 581da177e4SLinus Torvalds 591da177e4SLinus Torvalds /* Organization of SPD aka "XFRM rules" 601da177e4SLinus Torvalds ------------------------------------ 611da177e4SLinus Torvalds 621da177e4SLinus Torvalds Basic objects: 631da177e4SLinus Torvalds - policy rule, struct xfrm_policy (=SPD entry) 641da177e4SLinus Torvalds - bundle of transformations, struct dst_entry == struct xfrm_dst (=SA bundle) 651da177e4SLinus Torvalds - instance of a transformer, struct xfrm_state (=SA) 661da177e4SLinus Torvalds - template to clone xfrm_state, struct xfrm_tmpl 671da177e4SLinus Torvalds 681da177e4SLinus Torvalds SPD is plain linear list of xfrm_policy rules, ordered by priority. 691da177e4SLinus Torvalds (To be compatible with existing pfkeyv2 implementations, 701da177e4SLinus Torvalds many rules with priority of 0x7fffffff are allowed to exist and 711da177e4SLinus Torvalds such rules are ordered in an unpredictable way, thanks to bsd folks.) 721da177e4SLinus Torvalds 731da177e4SLinus Torvalds Lookup is plain linear search until the first match with selector. 741da177e4SLinus Torvalds 751da177e4SLinus Torvalds If "action" is "block", then we prohibit the flow, otherwise: 761da177e4SLinus Torvalds if "xfrms_nr" is zero, the flow passes untransformed. Otherwise, 771da177e4SLinus Torvalds policy entry has list of up to XFRM_MAX_DEPTH transformations, 781da177e4SLinus Torvalds described by templates xfrm_tmpl. Each template is resolved 791da177e4SLinus Torvalds to a complete xfrm_state (see below) and we pack bundle of transformations 801da177e4SLinus Torvalds to a dst_entry returned to requestor. 811da177e4SLinus Torvalds 821da177e4SLinus Torvalds dst -. xfrm .-> xfrm_state #1 831da177e4SLinus Torvalds |---. child .-> dst -. xfrm .-> xfrm_state #2 841da177e4SLinus Torvalds |---. child .-> dst -. xfrm .-> xfrm_state #3 851da177e4SLinus Torvalds |---. child .-> NULL 861da177e4SLinus Torvalds 871da177e4SLinus Torvalds Bundles are cached at xrfm_policy struct (field ->bundles). 881da177e4SLinus Torvalds 891da177e4SLinus Torvalds 901da177e4SLinus Torvalds Resolution of xrfm_tmpl 911da177e4SLinus Torvalds ----------------------- 921da177e4SLinus Torvalds Template contains: 931da177e4SLinus Torvalds 1. ->mode Mode: transport or tunnel 941da177e4SLinus Torvalds 2. ->id.proto Protocol: AH/ESP/IPCOMP 951da177e4SLinus Torvalds 3. ->id.daddr Remote tunnel endpoint, ignored for transport mode. 961da177e4SLinus Torvalds Q: allow to resolve security gateway? 971da177e4SLinus Torvalds 4. ->id.spi If not zero, static SPI. 981da177e4SLinus Torvalds 5. ->saddr Local tunnel endpoint, ignored for transport mode. 991da177e4SLinus Torvalds 6. ->algos List of allowed algos. Plain bitmask now. 1001da177e4SLinus Torvalds Q: ealgos, aalgos, calgos. What a mess... 1011da177e4SLinus Torvalds 7. ->share Sharing mode. 1021da177e4SLinus Torvalds Q: how to implement private sharing mode? To add struct sock* to 1031da177e4SLinus Torvalds flow id? 1041da177e4SLinus Torvalds 1051da177e4SLinus Torvalds Having this template we search through SAD searching for entries 1061da177e4SLinus Torvalds with appropriate mode/proto/algo, permitted by selector. 1071da177e4SLinus Torvalds If no appropriate entry found, it is requested from key manager. 1081da177e4SLinus Torvalds 1091da177e4SLinus Torvalds PROBLEMS: 1101da177e4SLinus Torvalds Q: How to find all the bundles referring to a physical path for 1111da177e4SLinus Torvalds PMTU discovery? Seems, dst should contain list of all parents... 1121da177e4SLinus Torvalds and enter to infinite locking hierarchy disaster. 1131da177e4SLinus Torvalds No! It is easier, we will not search for them, let them find us. 1141da177e4SLinus Torvalds We add genid to each dst plus pointer to genid of raw IP route, 1151da177e4SLinus Torvalds pmtu disc will update pmtu on raw IP route and increase its genid. 1161da177e4SLinus Torvalds dst_check() will see this for top level and trigger resyncing 1171da177e4SLinus Torvalds metrics. Plus, it will be made via sk->sk_dst_cache. Solved. 1181da177e4SLinus Torvalds */ 1191da177e4SLinus Torvalds 1201da177e4SLinus Torvalds /* Full description of state of transformer. */ 1211da177e4SLinus Torvalds struct xfrm_state 1221da177e4SLinus Torvalds { 1231da177e4SLinus Torvalds /* Note: bydst is re-used during gc */ 1248f126e37SDavid S. Miller struct hlist_node bydst; 1258f126e37SDavid S. Miller struct hlist_node bysrc; 1268f126e37SDavid S. Miller struct hlist_node byspi; 1271da177e4SLinus Torvalds 1281da177e4SLinus Torvalds atomic_t refcnt; 1291da177e4SLinus Torvalds spinlock_t lock; 1301da177e4SLinus Torvalds 1311da177e4SLinus Torvalds struct xfrm_id id; 1321da177e4SLinus Torvalds struct xfrm_selector sel; 1331da177e4SLinus Torvalds 1349d4a706dSDavid S. Miller u32 genid; 1359d4a706dSDavid S. Miller 1361da177e4SLinus Torvalds /* Key manger bits */ 1371da177e4SLinus Torvalds struct { 1381da177e4SLinus Torvalds u8 state; 1391da177e4SLinus Torvalds u8 dying; 1401da177e4SLinus Torvalds u32 seq; 1411da177e4SLinus Torvalds } km; 1421da177e4SLinus Torvalds 1431da177e4SLinus Torvalds /* Parameters of this state. */ 1441da177e4SLinus Torvalds struct { 1451da177e4SLinus Torvalds u32 reqid; 1461da177e4SLinus Torvalds u8 mode; 1471da177e4SLinus Torvalds u8 replay_window; 1481da177e4SLinus Torvalds u8 aalgo, ealgo, calgo; 1491da177e4SLinus Torvalds u8 flags; 1501da177e4SLinus Torvalds u16 family; 1511da177e4SLinus Torvalds xfrm_address_t saddr; 1521da177e4SLinus Torvalds int header_len; 1531da177e4SLinus Torvalds int trailer_len; 1541da177e4SLinus Torvalds } props; 1551da177e4SLinus Torvalds 1561da177e4SLinus Torvalds struct xfrm_lifetime_cfg lft; 1571da177e4SLinus Torvalds 1581da177e4SLinus Torvalds /* Data for transformer */ 1591da177e4SLinus Torvalds struct xfrm_algo *aalg; 1601da177e4SLinus Torvalds struct xfrm_algo *ealg; 1611da177e4SLinus Torvalds struct xfrm_algo *calg; 1621da177e4SLinus Torvalds 1631da177e4SLinus Torvalds /* Data for encapsulator */ 1641da177e4SLinus Torvalds struct xfrm_encap_tmpl *encap; 1651da177e4SLinus Torvalds 166060f02a3SNoriaki TAKAMIYA /* Data for care-of address */ 167060f02a3SNoriaki TAKAMIYA xfrm_address_t *coaddr; 168060f02a3SNoriaki TAKAMIYA 1691da177e4SLinus Torvalds /* IPComp needs an IPIP tunnel for handling uncompressed packets */ 1701da177e4SLinus Torvalds struct xfrm_state *tunnel; 1711da177e4SLinus Torvalds 1721da177e4SLinus Torvalds /* If a tunnel, number of users + 1 */ 1731da177e4SLinus Torvalds atomic_t tunnel_users; 1741da177e4SLinus Torvalds 1751da177e4SLinus Torvalds /* State for replay detection */ 1761da177e4SLinus Torvalds struct xfrm_replay_state replay; 1771da177e4SLinus Torvalds 178f8cd5488SJamal Hadi Salim /* Replay detection state at the time we sent the last notification */ 179f8cd5488SJamal Hadi Salim struct xfrm_replay_state preplay; 180f8cd5488SJamal Hadi Salim 1812717096aSJamal Hadi Salim /* internal flag that only holds state for delayed aevent at the 1822717096aSJamal Hadi Salim * moment 1832717096aSJamal Hadi Salim */ 1842717096aSJamal Hadi Salim u32 xflags; 1852717096aSJamal Hadi Salim 186f8cd5488SJamal Hadi Salim /* Replay detection notification settings */ 187f8cd5488SJamal Hadi Salim u32 replay_maxage; 188f8cd5488SJamal Hadi Salim u32 replay_maxdiff; 189f8cd5488SJamal Hadi Salim 190f8cd5488SJamal Hadi Salim /* Replay detection notification timer */ 191f8cd5488SJamal Hadi Salim struct timer_list rtimer; 192f8cd5488SJamal Hadi Salim 1931da177e4SLinus Torvalds /* Statistics */ 1941da177e4SLinus Torvalds struct xfrm_stats stats; 1951da177e4SLinus Torvalds 1961da177e4SLinus Torvalds struct xfrm_lifetime_cur curlft; 1971da177e4SLinus Torvalds struct timer_list timer; 1981da177e4SLinus Torvalds 1999afaca05SMasahide NAKAMURA /* Last used time */ 200d26f3984SHerbert Xu unsigned long lastused; 2019afaca05SMasahide NAKAMURA 2021da177e4SLinus Torvalds /* Reference to data common to all the instances of this 2031da177e4SLinus Torvalds * transformer. */ 2041da177e4SLinus Torvalds struct xfrm_type *type; 20513996378SHerbert Xu struct xfrm_mode *inner_mode; 20613996378SHerbert Xu struct xfrm_mode *outer_mode; 2071da177e4SLinus Torvalds 208df71837dSTrent Jaeger /* Security context */ 209df71837dSTrent Jaeger struct xfrm_sec_ctx *security; 210df71837dSTrent Jaeger 2111da177e4SLinus Torvalds /* Private data of this transformer, format is opaque, 2121da177e4SLinus Torvalds * interpreted by xfrm_type methods. */ 2131da177e4SLinus Torvalds void *data; 2141da177e4SLinus Torvalds }; 2151da177e4SLinus Torvalds 2162717096aSJamal Hadi Salim /* xflags - make enum if more show up */ 2172717096aSJamal Hadi Salim #define XFRM_TIME_DEFER 1 2182717096aSJamal Hadi Salim 2191da177e4SLinus Torvalds enum { 2201da177e4SLinus Torvalds XFRM_STATE_VOID, 2211da177e4SLinus Torvalds XFRM_STATE_ACQ, 2221da177e4SLinus Torvalds XFRM_STATE_VALID, 2231da177e4SLinus Torvalds XFRM_STATE_ERROR, 2241da177e4SLinus Torvalds XFRM_STATE_EXPIRED, 2251da177e4SLinus Torvalds XFRM_STATE_DEAD 2261da177e4SLinus Torvalds }; 2271da177e4SLinus Torvalds 22826b15dadSJamal Hadi Salim /* callback structure passed from either netlink or pfkey */ 22926b15dadSJamal Hadi Salim struct km_event 23026b15dadSJamal Hadi Salim { 231bf08867fSHerbert Xu union { 232bf08867fSHerbert Xu u32 hard; 233bf08867fSHerbert Xu u32 proto; 234bf08867fSHerbert Xu u32 byid; 235f8cd5488SJamal Hadi Salim u32 aevent; 236f7b6983fSMasahide NAKAMURA u32 type; 237bf08867fSHerbert Xu } data; 238bf08867fSHerbert Xu 23926b15dadSJamal Hadi Salim u32 seq; 24026b15dadSJamal Hadi Salim u32 pid; 24126b15dadSJamal Hadi Salim u32 event; 24226b15dadSJamal Hadi Salim }; 24326b15dadSJamal Hadi Salim 24425ee3286SHerbert Xu struct net_device; 2451da177e4SLinus Torvalds struct xfrm_type; 2461da177e4SLinus Torvalds struct xfrm_dst; 2471da177e4SLinus Torvalds struct xfrm_policy_afinfo { 2481da177e4SLinus Torvalds unsigned short family; 2491da177e4SLinus Torvalds struct dst_ops *dst_ops; 2501da177e4SLinus Torvalds void (*garbage_collect)(void); 25166cdb3caSHerbert Xu struct dst_entry *(*dst_lookup)(int tos, xfrm_address_t *saddr, 25266cdb3caSHerbert Xu xfrm_address_t *daddr); 253a1e59abfSPatrick McHardy int (*get_saddr)(xfrm_address_t *saddr, xfrm_address_t *daddr); 2541da177e4SLinus Torvalds struct dst_entry *(*find_bundle)(struct flowi *fl, struct xfrm_policy *policy); 2551da177e4SLinus Torvalds void (*decode_session)(struct sk_buff *skb, 256d5422efeSHerbert Xu struct flowi *fl, 257d5422efeSHerbert Xu int reverse); 25825ee3286SHerbert Xu int (*get_tos)(struct flowi *fl); 259a1b05140SMasahide NAKAMURA int (*init_path)(struct xfrm_dst *path, 260a1b05140SMasahide NAKAMURA struct dst_entry *dst, 261a1b05140SMasahide NAKAMURA int nfheader_len); 26225ee3286SHerbert Xu int (*fill_dst)(struct xfrm_dst *xdst, 26325ee3286SHerbert Xu struct net_device *dev); 2641da177e4SLinus Torvalds }; 2651da177e4SLinus Torvalds 2661da177e4SLinus Torvalds extern int xfrm_policy_register_afinfo(struct xfrm_policy_afinfo *afinfo); 2671da177e4SLinus Torvalds extern int xfrm_policy_unregister_afinfo(struct xfrm_policy_afinfo *afinfo); 26826b15dadSJamal Hadi Salim extern void km_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c); 26926b15dadSJamal Hadi Salim extern void km_state_notify(struct xfrm_state *x, struct km_event *c); 2701da177e4SLinus Torvalds 2711da177e4SLinus Torvalds struct xfrm_tmpl; 272980ebd25SJamal Hadi Salim extern int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol); 27353bc6b4dSJamal Hadi Salim extern void km_state_expired(struct xfrm_state *x, int hard, u32 pid); 27453bc6b4dSJamal Hadi Salim extern int __xfrm_state_delete(struct xfrm_state *x); 27553bc6b4dSJamal Hadi Salim 2761da177e4SLinus Torvalds struct xfrm_state_afinfo { 27717c2a42aSHerbert Xu unsigned int family; 27836cf9acfSHerbert Xu unsigned int proto; 279227620e2SHerbert Xu unsigned int eth_proto; 28017c2a42aSHerbert Xu struct module *owner; 281aa5d62ccSHerbert Xu struct xfrm_type *type_map[IPPROTO_MAX]; 282aa5d62ccSHerbert Xu struct xfrm_mode *mode_map[XFRM_MODE_MAX]; 283d094cd83SHerbert Xu int (*init_flags)(struct xfrm_state *x); 2841da177e4SLinus Torvalds void (*init_tempsel)(struct xfrm_state *x, struct flowi *fl, 2851da177e4SLinus Torvalds struct xfrm_tmpl *tmpl, 2861da177e4SLinus Torvalds xfrm_address_t *daddr, xfrm_address_t *saddr); 28741a49cc3SMasahide NAKAMURA int (*tmpl_sort)(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n); 28841a49cc3SMasahide NAKAMURA int (*state_sort)(struct xfrm_state **dst, struct xfrm_state **src, int n); 289cdca7265SMiika Komu int (*output)(struct sk_buff *skb); 290227620e2SHerbert Xu int (*extract_input)(struct xfrm_state *x, 291227620e2SHerbert Xu struct sk_buff *skb); 29236cf9acfSHerbert Xu int (*extract_output)(struct xfrm_state *x, 29336cf9acfSHerbert Xu struct sk_buff *skb); 294716062fdSHerbert Xu int (*transport_finish)(struct sk_buff *skb, 295716062fdSHerbert Xu int async); 2961da177e4SLinus Torvalds }; 2971da177e4SLinus Torvalds 2981da177e4SLinus Torvalds extern int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo); 2991da177e4SLinus Torvalds extern int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo); 3001da177e4SLinus Torvalds 3011da177e4SLinus Torvalds extern void xfrm_state_delete_tunnel(struct xfrm_state *x); 3021da177e4SLinus Torvalds 3031da177e4SLinus Torvalds struct xfrm_type 3041da177e4SLinus Torvalds { 3051da177e4SLinus Torvalds char *description; 3061da177e4SLinus Torvalds struct module *owner; 3071da177e4SLinus Torvalds __u8 proto; 3081b5c2299SMasahide NAKAMURA __u8 flags; 3091b5c2299SMasahide NAKAMURA #define XFRM_TYPE_NON_FRAGMENT 1 310436a0a40SHerbert Xu #define XFRM_TYPE_REPLAY_PROT 2 311f04e7e8dSHerbert Xu #define XFRM_TYPE_LOCAL_COADDR 4 312f04e7e8dSHerbert Xu #define XFRM_TYPE_REMOTE_COADDR 8 3131da177e4SLinus Torvalds 31472cb6962SHerbert Xu int (*init_state)(struct xfrm_state *x); 3151da177e4SLinus Torvalds void (*destructor)(struct xfrm_state *); 316e695633eSHerbert Xu int (*input)(struct xfrm_state *, struct sk_buff *skb); 3171da177e4SLinus Torvalds int (*output)(struct xfrm_state *, struct sk_buff *pskb); 318df0ba92aSMasahide NAKAMURA int (*reject)(struct xfrm_state *, struct sk_buff *, struct flowi *); 319aee5adb4SMasahide NAKAMURA int (*hdr_offset)(struct xfrm_state *, struct sk_buff *, u8 **); 3201da177e4SLinus Torvalds /* Estimate maximal size of result of transformation of a dgram */ 321c5c25238SPatrick McHardy u32 (*get_mtu)(struct xfrm_state *, int size); 3221da177e4SLinus Torvalds }; 3231da177e4SLinus Torvalds 3241da177e4SLinus Torvalds extern int xfrm_register_type(struct xfrm_type *type, unsigned short family); 3251da177e4SLinus Torvalds extern int xfrm_unregister_type(struct xfrm_type *type, unsigned short family); 3261da177e4SLinus Torvalds 327b59f45d0SHerbert Xu struct xfrm_mode { 328227620e2SHerbert Xu /* 329227620e2SHerbert Xu * Remove encapsulation header. 330227620e2SHerbert Xu * 331227620e2SHerbert Xu * The IP header will be moved over the top of the encapsulation 332227620e2SHerbert Xu * header. 333227620e2SHerbert Xu * 334227620e2SHerbert Xu * On entry, the transport header shall point to where the IP header 335227620e2SHerbert Xu * should be and the network header shall be set to where the IP 336227620e2SHerbert Xu * header currently is. skb->data shall point to the start of the 337227620e2SHerbert Xu * payload. 338227620e2SHerbert Xu */ 339227620e2SHerbert Xu int (*input2)(struct xfrm_state *x, struct sk_buff *skb); 340227620e2SHerbert Xu 341227620e2SHerbert Xu /* 342227620e2SHerbert Xu * This is the actual input entry point. 343227620e2SHerbert Xu * 344227620e2SHerbert Xu * For transport mode and equivalent this would be identical to 345227620e2SHerbert Xu * input2 (which does not need to be set). While tunnel mode 346227620e2SHerbert Xu * and equivalent would set this to the tunnel encapsulation function 347227620e2SHerbert Xu * xfrm4_prepare_input that would in turn call input2. 348227620e2SHerbert Xu */ 349b59f45d0SHerbert Xu int (*input)(struct xfrm_state *x, struct sk_buff *skb); 35037fedd3aSHerbert Xu 35137fedd3aSHerbert Xu /* 35237fedd3aSHerbert Xu * Add encapsulation header. 35337fedd3aSHerbert Xu * 35437fedd3aSHerbert Xu * On exit, the transport header will be set to the start of the 35537fedd3aSHerbert Xu * encapsulation header to be filled in by x->type->output and 35637fedd3aSHerbert Xu * the mac header will be set to the nextheader (protocol for 35737fedd3aSHerbert Xu * IPv4) field of the extension header directly preceding the 35837fedd3aSHerbert Xu * encapsulation header, or in its absence, that of the top IP 35937fedd3aSHerbert Xu * header. The value of the network header will always point 36037fedd3aSHerbert Xu * to the top IP header while skb->data will point to the payload. 36137fedd3aSHerbert Xu */ 36236cf9acfSHerbert Xu int (*output2)(struct xfrm_state *x,struct sk_buff *skb); 36336cf9acfSHerbert Xu 36436cf9acfSHerbert Xu /* 36536cf9acfSHerbert Xu * This is the actual output entry point. 36636cf9acfSHerbert Xu * 36736cf9acfSHerbert Xu * For transport mode and equivalent this would be identical to 36836cf9acfSHerbert Xu * output2 (which does not need to be set). While tunnel mode 36936cf9acfSHerbert Xu * and equivalent would set this to a tunnel encapsulation function 37036cf9acfSHerbert Xu * (xfrm4_prepare_output or xfrm6_prepare_output) that would in turn 37136cf9acfSHerbert Xu * call output2. 37236cf9acfSHerbert Xu */ 373eb878e84SJamal Hadi Salim int (*output)(struct xfrm_state *x, struct sk_buff *skb); 374b59f45d0SHerbert Xu 37517c2a42aSHerbert Xu struct xfrm_state_afinfo *afinfo; 376b59f45d0SHerbert Xu struct module *owner; 377b59f45d0SHerbert Xu unsigned int encap; 3781bfcb10fSHerbert Xu int flags; 3791bfcb10fSHerbert Xu }; 3801bfcb10fSHerbert Xu 3811bfcb10fSHerbert Xu /* Flags for xfrm_mode. */ 3821bfcb10fSHerbert Xu enum { 3831bfcb10fSHerbert Xu XFRM_MODE_FLAG_TUNNEL = 1, 384b59f45d0SHerbert Xu }; 385b59f45d0SHerbert Xu 386b59f45d0SHerbert Xu extern int xfrm_register_mode(struct xfrm_mode *mode, int family); 387b59f45d0SHerbert Xu extern int xfrm_unregister_mode(struct xfrm_mode *mode, int family); 388b59f45d0SHerbert Xu 3891da177e4SLinus Torvalds struct xfrm_tmpl 3901da177e4SLinus Torvalds { 3911da177e4SLinus Torvalds /* id in template is interpreted as: 3921da177e4SLinus Torvalds * daddr - destination of tunnel, may be zero for transport mode. 3931da177e4SLinus Torvalds * spi - zero to acquire spi. Not zero if spi is static, then 3941da177e4SLinus Torvalds * daddr must be fixed too. 3951da177e4SLinus Torvalds * proto - AH/ESP/IPCOMP 3961da177e4SLinus Torvalds */ 3971da177e4SLinus Torvalds struct xfrm_id id; 3981da177e4SLinus Torvalds 3991da177e4SLinus Torvalds /* Source address of tunnel. Ignored, if it is not a tunnel. */ 4001da177e4SLinus Torvalds xfrm_address_t saddr; 4011da177e4SLinus Torvalds 40276b3f055SMiika Komu unsigned short encap_family; 40376b3f055SMiika Komu 4041da177e4SLinus Torvalds __u32 reqid; 4051da177e4SLinus Torvalds 4067e49e6deSMasahide NAKAMURA /* Mode: transport, tunnel etc. */ 4071da177e4SLinus Torvalds __u8 mode; 4081da177e4SLinus Torvalds 4091da177e4SLinus Torvalds /* Sharing mode: unique, this session only, this user only etc. */ 4101da177e4SLinus Torvalds __u8 share; 4111da177e4SLinus Torvalds 4121da177e4SLinus Torvalds /* May skip this transfomration if no SA is found */ 4131da177e4SLinus Torvalds __u8 optional; 4141da177e4SLinus Torvalds 4151da177e4SLinus Torvalds /* Bit mask of algos allowed for acquisition */ 4161da177e4SLinus Torvalds __u32 aalgos; 4171da177e4SLinus Torvalds __u32 ealgos; 4181da177e4SLinus Torvalds __u32 calgos; 4191da177e4SLinus Torvalds }; 4201da177e4SLinus Torvalds 421622dc828SMasahide NAKAMURA #define XFRM_MAX_DEPTH 6 4221da177e4SLinus Torvalds 4231da177e4SLinus Torvalds struct xfrm_policy 4241da177e4SLinus Torvalds { 4251da177e4SLinus Torvalds struct xfrm_policy *next; 4262518c7c2SDavid S. Miller struct hlist_node bydst; 4272518c7c2SDavid S. Miller struct hlist_node byidx; 4281da177e4SLinus Torvalds 4291da177e4SLinus Torvalds /* This lock only affects elements except for entry. */ 4301da177e4SLinus Torvalds rwlock_t lock; 4311da177e4SLinus Torvalds atomic_t refcnt; 4321da177e4SLinus Torvalds struct timer_list timer; 4331da177e4SLinus Torvalds 4341da177e4SLinus Torvalds u32 priority; 4351da177e4SLinus Torvalds u32 index; 4361da177e4SLinus Torvalds struct xfrm_selector selector; 4371da177e4SLinus Torvalds struct xfrm_lifetime_cfg lft; 4381da177e4SLinus Torvalds struct xfrm_lifetime_cur curlft; 4391da177e4SLinus Torvalds struct dst_entry *bundles; 44046ca5f5dSArnaldo Carvalho de Melo u16 family; 44146ca5f5dSArnaldo Carvalho de Melo u8 type; 44246ca5f5dSArnaldo Carvalho de Melo u8 action; 44346ca5f5dSArnaldo Carvalho de Melo u8 flags; 44446ca5f5dSArnaldo Carvalho de Melo u8 dead; 44546ca5f5dSArnaldo Carvalho de Melo u8 xfrm_nr; 44646ca5f5dSArnaldo Carvalho de Melo /* XXX 1 byte hole, try to pack */ 447df71837dSTrent Jaeger struct xfrm_sec_ctx *security; 4481da177e4SLinus Torvalds struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH]; 4491da177e4SLinus Torvalds }; 4501da177e4SLinus Torvalds 45180c9abaaSShinta Sugimoto struct xfrm_migrate { 45280c9abaaSShinta Sugimoto xfrm_address_t old_daddr; 45380c9abaaSShinta Sugimoto xfrm_address_t old_saddr; 45480c9abaaSShinta Sugimoto xfrm_address_t new_daddr; 45580c9abaaSShinta Sugimoto xfrm_address_t new_saddr; 45680c9abaaSShinta Sugimoto u8 proto; 45780c9abaaSShinta Sugimoto u8 mode; 45880c9abaaSShinta Sugimoto u16 reserved; 45980c9abaaSShinta Sugimoto u32 reqid; 46080c9abaaSShinta Sugimoto u16 old_family; 46180c9abaaSShinta Sugimoto u16 new_family; 46280c9abaaSShinta Sugimoto }; 46380c9abaaSShinta Sugimoto 4641da177e4SLinus Torvalds #define XFRM_KM_TIMEOUT 30 465f8cd5488SJamal Hadi Salim /* which seqno */ 466f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_SEQ 1 467f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_OSEQ 2 468f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_SEQ_MASK 3 469f8cd5488SJamal Hadi Salim /* what happened */ 470f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_UPDATE XFRM_AE_CR 471f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_TIMEOUT XFRM_AE_CE 472f8cd5488SJamal Hadi Salim 473f8cd5488SJamal Hadi Salim /* default aevent timeout in units of 100ms */ 474f8cd5488SJamal Hadi Salim #define XFRM_AE_ETIME 10 475f8cd5488SJamal Hadi Salim /* Async Event timer multiplier */ 476f8cd5488SJamal Hadi Salim #define XFRM_AE_ETH_M 10 477f8cd5488SJamal Hadi Salim /* default seq threshold size */ 478f8cd5488SJamal Hadi Salim #define XFRM_AE_SEQT_SIZE 2 4791da177e4SLinus Torvalds 4801da177e4SLinus Torvalds struct xfrm_mgr 4811da177e4SLinus Torvalds { 4821da177e4SLinus Torvalds struct list_head list; 4831da177e4SLinus Torvalds char *id; 48426b15dadSJamal Hadi Salim int (*notify)(struct xfrm_state *x, struct km_event *c); 4851da177e4SLinus Torvalds int (*acquire)(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *xp, int dir); 486cb969f07SVenkat Yekkirala struct xfrm_policy *(*compile_policy)(struct sock *sk, int opt, u8 *data, int len, int *dir); 4875d36b180SAl Viro int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); 48826b15dadSJamal Hadi Salim int (*notify_policy)(struct xfrm_policy *x, int dir, struct km_event *c); 48997a64b45SMasahide NAKAMURA int (*report)(u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr); 49080c9abaaSShinta Sugimoto int (*migrate)(struct xfrm_selector *sel, u8 dir, u8 type, struct xfrm_migrate *m, int num_bundles); 4911da177e4SLinus Torvalds }; 4921da177e4SLinus Torvalds 4931da177e4SLinus Torvalds extern int xfrm_register_km(struct xfrm_mgr *km); 4941da177e4SLinus Torvalds extern int xfrm_unregister_km(struct xfrm_mgr *km); 4951da177e4SLinus Torvalds 4962518c7c2SDavid S. Miller extern unsigned int xfrm_policy_count[XFRM_POLICY_MAX*2]; 4971da177e4SLinus Torvalds 498436a0a40SHerbert Xu /* 499436a0a40SHerbert Xu * This structure is used for the duration where packets are being 500436a0a40SHerbert Xu * transformed by IPsec. As soon as the packet leaves IPsec the 501436a0a40SHerbert Xu * area beyond the generic IP part may be overwritten. 502436a0a40SHerbert Xu */ 503436a0a40SHerbert Xu struct xfrm_skb_cb { 504436a0a40SHerbert Xu union { 505436a0a40SHerbert Xu struct inet_skb_parm h4; 506436a0a40SHerbert Xu struct inet6_skb_parm h6; 507436a0a40SHerbert Xu } header; 508436a0a40SHerbert Xu 509436a0a40SHerbert Xu /* Sequence number for replay protection. */ 510436a0a40SHerbert Xu u64 seq; 511436a0a40SHerbert Xu }; 512436a0a40SHerbert Xu 513436a0a40SHerbert Xu #define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0])) 514436a0a40SHerbert Xu 51536cf9acfSHerbert Xu /* 51636cf9acfSHerbert Xu * This structure is used by the afinfo prepare_input/prepare_output functions 51736cf9acfSHerbert Xu * to transmit header information to the mode input/output functions. 51836cf9acfSHerbert Xu */ 51936cf9acfSHerbert Xu struct xfrm_mode_skb_cb { 52036cf9acfSHerbert Xu union { 52136cf9acfSHerbert Xu struct inet_skb_parm h4; 52236cf9acfSHerbert Xu struct inet6_skb_parm h6; 52336cf9acfSHerbert Xu } header; 52436cf9acfSHerbert Xu 52536cf9acfSHerbert Xu /* Copied from header for IPv4, always set to zero and DF for IPv6. */ 52636cf9acfSHerbert Xu __be16 id; 52736cf9acfSHerbert Xu __be16 frag_off; 52836cf9acfSHerbert Xu 52936cf9acfSHerbert Xu /* TOS for IPv4, class for IPv6. */ 53036cf9acfSHerbert Xu u8 tos; 53136cf9acfSHerbert Xu 53236cf9acfSHerbert Xu /* TTL for IPv4, hop limitfor IPv6. */ 53336cf9acfSHerbert Xu u8 ttl; 53436cf9acfSHerbert Xu 53536cf9acfSHerbert Xu /* Protocol for IPv4, NH for IPv6. */ 53636cf9acfSHerbert Xu u8 protocol; 53736cf9acfSHerbert Xu 53836cf9acfSHerbert Xu /* Used by IPv6 only, zero for IPv4. */ 53936cf9acfSHerbert Xu u8 flow_lbl[3]; 54036cf9acfSHerbert Xu }; 54136cf9acfSHerbert Xu 54236cf9acfSHerbert Xu #define XFRM_MODE_SKB_CB(__skb) ((struct xfrm_mode_skb_cb *)&((__skb)->cb[0])) 54336cf9acfSHerbert Xu 544716062fdSHerbert Xu /* 545716062fdSHerbert Xu * This structure is used by the input processing to locate the SPI and 546716062fdSHerbert Xu * related information. 547716062fdSHerbert Xu */ 548716062fdSHerbert Xu struct xfrm_spi_skb_cb { 549716062fdSHerbert Xu union { 550716062fdSHerbert Xu struct inet_skb_parm h4; 551716062fdSHerbert Xu struct inet6_skb_parm h6; 552716062fdSHerbert Xu } header; 553716062fdSHerbert Xu 554716062fdSHerbert Xu unsigned int daddroff; 5552fcb45b6SHerbert Xu unsigned int family; 556716062fdSHerbert Xu }; 557716062fdSHerbert Xu 558716062fdSHerbert Xu #define XFRM_SPI_SKB_CB(__skb) ((struct xfrm_spi_skb_cb *)&((__skb)->cb[0])) 559716062fdSHerbert Xu 560161a09e7SJoy Latten /* Audit Information */ 561161a09e7SJoy Latten struct xfrm_audit 562161a09e7SJoy Latten { 563ab5f5e8bSJoy Latten u32 loginuid; 564161a09e7SJoy Latten u32 secid; 565161a09e7SJoy Latten }; 566c9204d9cSJoy Latten 567c9204d9cSJoy Latten #ifdef CONFIG_AUDITSYSCALL 568ab5f5e8bSJoy Latten static inline struct audit_buffer *xfrm_audit_start(u32 auid, u32 sid) 569ab5f5e8bSJoy Latten { 570ab5f5e8bSJoy Latten struct audit_buffer *audit_buf = NULL; 571ab5f5e8bSJoy Latten char *secctx; 572ab5f5e8bSJoy Latten u32 secctx_len; 573ab5f5e8bSJoy Latten 574ab5f5e8bSJoy Latten audit_buf = audit_log_start(current->audit_context, GFP_ATOMIC, 575ab5f5e8bSJoy Latten AUDIT_MAC_IPSEC_EVENT); 576ab5f5e8bSJoy Latten if (audit_buf == NULL) 577ab5f5e8bSJoy Latten return NULL; 578ab5f5e8bSJoy Latten 579ab5f5e8bSJoy Latten audit_log_format(audit_buf, "auid=%u", auid); 580ab5f5e8bSJoy Latten 581ab5f5e8bSJoy Latten if (sid != 0 && 582ab5f5e8bSJoy Latten security_secid_to_secctx(sid, &secctx, &secctx_len) == 0) { 583ab5f5e8bSJoy Latten audit_log_format(audit_buf, " subj=%s", secctx); 584ab5f5e8bSJoy Latten security_release_secctx(secctx, secctx_len); 585ab5f5e8bSJoy Latten } else 586ab5f5e8bSJoy Latten audit_log_task_context(audit_buf); 587ab5f5e8bSJoy Latten return audit_buf; 588ab5f5e8bSJoy Latten } 589ab5f5e8bSJoy Latten 590ab5f5e8bSJoy Latten extern void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, 591ab5f5e8bSJoy Latten u32 auid, u32 sid); 592ab5f5e8bSJoy Latten extern void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, 593ab5f5e8bSJoy Latten u32 auid, u32 sid); 594ab5f5e8bSJoy Latten extern void xfrm_audit_state_add(struct xfrm_state *x, int result, 595ab5f5e8bSJoy Latten u32 auid, u32 sid); 596ab5f5e8bSJoy Latten extern void xfrm_audit_state_delete(struct xfrm_state *x, int result, 597ab5f5e8bSJoy Latten u32 auid, u32 sid); 598c9204d9cSJoy Latten #else 599ab5f5e8bSJoy Latten #define xfrm_audit_policy_add(x, r, a, s) do { ; } while (0) 600ab5f5e8bSJoy Latten #define xfrm_audit_policy_delete(x, r, a, s) do { ; } while (0) 601ab5f5e8bSJoy Latten #define xfrm_audit_state_add(x, r, a, s) do { ; } while (0) 602ab5f5e8bSJoy Latten #define xfrm_audit_state_delete(x, r, a, s) do { ; } while (0) 603c9204d9cSJoy Latten #endif /* CONFIG_AUDITSYSCALL */ 604161a09e7SJoy Latten 6051da177e4SLinus Torvalds static inline void xfrm_pol_hold(struct xfrm_policy *policy) 6061da177e4SLinus Torvalds { 6071da177e4SLinus Torvalds if (likely(policy != NULL)) 6081da177e4SLinus Torvalds atomic_inc(&policy->refcnt); 6091da177e4SLinus Torvalds } 6101da177e4SLinus Torvalds 6111da177e4SLinus Torvalds extern void __xfrm_policy_destroy(struct xfrm_policy *policy); 6121da177e4SLinus Torvalds 6131da177e4SLinus Torvalds static inline void xfrm_pol_put(struct xfrm_policy *policy) 6141da177e4SLinus Torvalds { 6151da177e4SLinus Torvalds if (atomic_dec_and_test(&policy->refcnt)) 6161da177e4SLinus Torvalds __xfrm_policy_destroy(policy); 6171da177e4SLinus Torvalds } 6181da177e4SLinus Torvalds 6194e81bb83SMasahide NAKAMURA #ifdef CONFIG_XFRM_SUB_POLICY 6204e81bb83SMasahide NAKAMURA static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols) 6214e81bb83SMasahide NAKAMURA { 6224e81bb83SMasahide NAKAMURA int i; 6234e81bb83SMasahide NAKAMURA for (i = npols - 1; i >= 0; --i) 6244e81bb83SMasahide NAKAMURA xfrm_pol_put(pols[i]); 6254e81bb83SMasahide NAKAMURA } 6264e81bb83SMasahide NAKAMURA #else 6274e81bb83SMasahide NAKAMURA static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols) 6284e81bb83SMasahide NAKAMURA { 6294e81bb83SMasahide NAKAMURA xfrm_pol_put(pols[0]); 6304e81bb83SMasahide NAKAMURA } 6314e81bb83SMasahide NAKAMURA #endif 6324e81bb83SMasahide NAKAMURA 6331da177e4SLinus Torvalds extern void __xfrm_state_destroy(struct xfrm_state *); 6341da177e4SLinus Torvalds 63521380b81SHerbert Xu static inline void __xfrm_state_put(struct xfrm_state *x) 63621380b81SHerbert Xu { 63721380b81SHerbert Xu atomic_dec(&x->refcnt); 63821380b81SHerbert Xu } 63921380b81SHerbert Xu 6401da177e4SLinus Torvalds static inline void xfrm_state_put(struct xfrm_state *x) 6411da177e4SLinus Torvalds { 6421da177e4SLinus Torvalds if (atomic_dec_and_test(&x->refcnt)) 6431da177e4SLinus Torvalds __xfrm_state_destroy(x); 6441da177e4SLinus Torvalds } 6451da177e4SLinus Torvalds 6461da177e4SLinus Torvalds static inline void xfrm_state_hold(struct xfrm_state *x) 6471da177e4SLinus Torvalds { 6481da177e4SLinus Torvalds atomic_inc(&x->refcnt); 6491da177e4SLinus Torvalds } 6501da177e4SLinus Torvalds 6511da177e4SLinus Torvalds static __inline__ int addr_match(void *token1, void *token2, int prefixlen) 6521da177e4SLinus Torvalds { 6535f19343fSAl Viro __be32 *a1 = token1; 6545f19343fSAl Viro __be32 *a2 = token2; 6551da177e4SLinus Torvalds int pdw; 6561da177e4SLinus Torvalds int pbi; 6571da177e4SLinus Torvalds 6581da177e4SLinus Torvalds pdw = prefixlen >> 5; /* num of whole __u32 in prefix */ 6591da177e4SLinus Torvalds pbi = prefixlen & 0x1f; /* num of bits in incomplete u32 in prefix */ 6601da177e4SLinus Torvalds 6611da177e4SLinus Torvalds if (pdw) 6621da177e4SLinus Torvalds if (memcmp(a1, a2, pdw << 2)) 6631da177e4SLinus Torvalds return 0; 6641da177e4SLinus Torvalds 6651da177e4SLinus Torvalds if (pbi) { 6665f19343fSAl Viro __be32 mask; 6671da177e4SLinus Torvalds 6681da177e4SLinus Torvalds mask = htonl((0xffffffff) << (32 - pbi)); 6691da177e4SLinus Torvalds 6701da177e4SLinus Torvalds if ((a1[pdw] ^ a2[pdw]) & mask) 6711da177e4SLinus Torvalds return 0; 6721da177e4SLinus Torvalds } 6731da177e4SLinus Torvalds 6741da177e4SLinus Torvalds return 1; 6751da177e4SLinus Torvalds } 6761da177e4SLinus Torvalds 6771da177e4SLinus Torvalds static __inline__ 678f9d07e41SAl Viro __be16 xfrm_flowi_sport(struct flowi *fl) 6791da177e4SLinus Torvalds { 680f9d07e41SAl Viro __be16 port; 6811da177e4SLinus Torvalds switch(fl->proto) { 6821da177e4SLinus Torvalds case IPPROTO_TCP: 6831da177e4SLinus Torvalds case IPPROTO_UDP: 684ba4e58ecSGerrit Renker case IPPROTO_UDPLITE: 6851da177e4SLinus Torvalds case IPPROTO_SCTP: 6861da177e4SLinus Torvalds port = fl->fl_ip_sport; 6871da177e4SLinus Torvalds break; 6881da177e4SLinus Torvalds case IPPROTO_ICMP: 6891da177e4SLinus Torvalds case IPPROTO_ICMPV6: 6901da177e4SLinus Torvalds port = htons(fl->fl_icmp_type); 6911da177e4SLinus Torvalds break; 6922ce4272aSMasahide NAKAMURA case IPPROTO_MH: 6932ce4272aSMasahide NAKAMURA port = htons(fl->fl_mh_type); 6942ce4272aSMasahide NAKAMURA break; 6951da177e4SLinus Torvalds default: 6961da177e4SLinus Torvalds port = 0; /*XXX*/ 6971da177e4SLinus Torvalds } 6981da177e4SLinus Torvalds return port; 6991da177e4SLinus Torvalds } 7001da177e4SLinus Torvalds 7011da177e4SLinus Torvalds static __inline__ 702f9d07e41SAl Viro __be16 xfrm_flowi_dport(struct flowi *fl) 7031da177e4SLinus Torvalds { 704f9d07e41SAl Viro __be16 port; 7051da177e4SLinus Torvalds switch(fl->proto) { 7061da177e4SLinus Torvalds case IPPROTO_TCP: 7071da177e4SLinus Torvalds case IPPROTO_UDP: 708ba4e58ecSGerrit Renker case IPPROTO_UDPLITE: 7091da177e4SLinus Torvalds case IPPROTO_SCTP: 7101da177e4SLinus Torvalds port = fl->fl_ip_dport; 7111da177e4SLinus Torvalds break; 7121da177e4SLinus Torvalds case IPPROTO_ICMP: 7131da177e4SLinus Torvalds case IPPROTO_ICMPV6: 7141da177e4SLinus Torvalds port = htons(fl->fl_icmp_code); 7151da177e4SLinus Torvalds break; 7161da177e4SLinus Torvalds default: 7171da177e4SLinus Torvalds port = 0; /*XXX*/ 7181da177e4SLinus Torvalds } 7191da177e4SLinus Torvalds return port; 7201da177e4SLinus Torvalds } 7211da177e4SLinus Torvalds 72277681021SAndrew Morton extern int xfrm_selector_match(struct xfrm_selector *sel, struct flowi *fl, 72377681021SAndrew Morton unsigned short family); 7241da177e4SLinus Torvalds 725df71837dSTrent Jaeger #ifdef CONFIG_SECURITY_NETWORK_XFRM 726df71837dSTrent Jaeger /* If neither has a context --> match 727df71837dSTrent Jaeger * Otherwise, both must have a context and the sids, doi, alg must match 728df71837dSTrent Jaeger */ 729df71837dSTrent Jaeger static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) 730df71837dSTrent Jaeger { 731df71837dSTrent Jaeger return ((!s1 && !s2) || 732df71837dSTrent Jaeger (s1 && s2 && 733df71837dSTrent Jaeger (s1->ctx_sid == s2->ctx_sid) && 734df71837dSTrent Jaeger (s1->ctx_doi == s2->ctx_doi) && 735df71837dSTrent Jaeger (s1->ctx_alg == s2->ctx_alg))); 736df71837dSTrent Jaeger } 737df71837dSTrent Jaeger #else 738df71837dSTrent Jaeger static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) 739df71837dSTrent Jaeger { 740df71837dSTrent Jaeger return 1; 741df71837dSTrent Jaeger } 742df71837dSTrent Jaeger #endif 743df71837dSTrent Jaeger 7441da177e4SLinus Torvalds /* A struct encoding bundle of transformations to apply to some set of flow. 7451da177e4SLinus Torvalds * 7461da177e4SLinus Torvalds * dst->child points to the next element of bundle. 7471da177e4SLinus Torvalds * dst->xfrm points to an instanse of transformer. 7481da177e4SLinus Torvalds * 7491da177e4SLinus Torvalds * Due to unfortunate limitations of current routing cache, which we 7501da177e4SLinus Torvalds * have no time to fix, it mirrors struct rtable and bound to the same 7511da177e4SLinus Torvalds * routing key, including saddr,daddr. However, we can have many of 7521da177e4SLinus Torvalds * bundles differing by session id. All the bundles grow from a parent 7531da177e4SLinus Torvalds * policy rule. 7541da177e4SLinus Torvalds */ 7551da177e4SLinus Torvalds struct xfrm_dst 7561da177e4SLinus Torvalds { 7571da177e4SLinus Torvalds union { 7581da177e4SLinus Torvalds struct dst_entry dst; 7591da177e4SLinus Torvalds struct rtable rt; 7601da177e4SLinus Torvalds struct rt6_info rt6; 7611da177e4SLinus Torvalds } u; 7621da177e4SLinus Torvalds struct dst_entry *route; 763157bfc25SMasahide NAKAMURA #ifdef CONFIG_XFRM_SUB_POLICY 764157bfc25SMasahide NAKAMURA struct flowi *origin; 765157bfc25SMasahide NAKAMURA struct xfrm_selector *partner; 766157bfc25SMasahide NAKAMURA #endif 7679d4a706dSDavid S. Miller u32 genid; 7681da177e4SLinus Torvalds u32 route_mtu_cached; 7691da177e4SLinus Torvalds u32 child_mtu_cached; 77092d63decSHideaki YOSHIFUJI u32 route_cookie; 77192d63decSHideaki YOSHIFUJI u32 path_cookie; 7721da177e4SLinus Torvalds }; 7731da177e4SLinus Torvalds 774aabc9761SHerbert Xu static inline void xfrm_dst_destroy(struct xfrm_dst *xdst) 775aabc9761SHerbert Xu { 776aabc9761SHerbert Xu dst_release(xdst->route); 777aabc9761SHerbert Xu if (likely(xdst->u.dst.xfrm)) 778aabc9761SHerbert Xu xfrm_state_put(xdst->u.dst.xfrm); 779157bfc25SMasahide NAKAMURA #ifdef CONFIG_XFRM_SUB_POLICY 780157bfc25SMasahide NAKAMURA kfree(xdst->origin); 781157bfc25SMasahide NAKAMURA xdst->origin = NULL; 782157bfc25SMasahide NAKAMURA kfree(xdst->partner); 783157bfc25SMasahide NAKAMURA xdst->partner = NULL; 784157bfc25SMasahide NAKAMURA #endif 785aabc9761SHerbert Xu } 786aabc9761SHerbert Xu 787aabc9761SHerbert Xu extern void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev); 788aabc9761SHerbert Xu 7891da177e4SLinus Torvalds struct sec_path 7901da177e4SLinus Torvalds { 7911da177e4SLinus Torvalds atomic_t refcnt; 7921da177e4SLinus Torvalds int len; 793dbe5b4aaSHerbert Xu struct xfrm_state *xvec[XFRM_MAX_DEPTH]; 7941da177e4SLinus Torvalds }; 7951da177e4SLinus Torvalds 7961da177e4SLinus Torvalds static inline struct sec_path * 7971da177e4SLinus Torvalds secpath_get(struct sec_path *sp) 7981da177e4SLinus Torvalds { 7991da177e4SLinus Torvalds if (sp) 8001da177e4SLinus Torvalds atomic_inc(&sp->refcnt); 8011da177e4SLinus Torvalds return sp; 8021da177e4SLinus Torvalds } 8031da177e4SLinus Torvalds 8041da177e4SLinus Torvalds extern void __secpath_destroy(struct sec_path *sp); 8051da177e4SLinus Torvalds 8061da177e4SLinus Torvalds static inline void 8071da177e4SLinus Torvalds secpath_put(struct sec_path *sp) 8081da177e4SLinus Torvalds { 8091da177e4SLinus Torvalds if (sp && atomic_dec_and_test(&sp->refcnt)) 8101da177e4SLinus Torvalds __secpath_destroy(sp); 8111da177e4SLinus Torvalds } 8121da177e4SLinus Torvalds 8131da177e4SLinus Torvalds extern struct sec_path *secpath_dup(struct sec_path *src); 8141da177e4SLinus Torvalds 8151da177e4SLinus Torvalds static inline void 8161da177e4SLinus Torvalds secpath_reset(struct sk_buff *skb) 8171da177e4SLinus Torvalds { 8181da177e4SLinus Torvalds #ifdef CONFIG_XFRM 8191da177e4SLinus Torvalds secpath_put(skb->sp); 8201da177e4SLinus Torvalds skb->sp = NULL; 8211da177e4SLinus Torvalds #endif 8221da177e4SLinus Torvalds } 8231da177e4SLinus Torvalds 8241da177e4SLinus Torvalds static inline int 825a1e59abfSPatrick McHardy xfrm_addr_any(xfrm_address_t *addr, unsigned short family) 826a1e59abfSPatrick McHardy { 827a1e59abfSPatrick McHardy switch (family) { 828a1e59abfSPatrick McHardy case AF_INET: 829a1e59abfSPatrick McHardy return addr->a4 == 0; 830a1e59abfSPatrick McHardy case AF_INET6: 831a1e59abfSPatrick McHardy return ipv6_addr_any((struct in6_addr *)&addr->a6); 832a1e59abfSPatrick McHardy } 833a1e59abfSPatrick McHardy return 0; 834a1e59abfSPatrick McHardy } 835a1e59abfSPatrick McHardy 836a1e59abfSPatrick McHardy static inline int 8371da177e4SLinus Torvalds __xfrm4_state_addr_cmp(struct xfrm_tmpl *tmpl, struct xfrm_state *x) 8381da177e4SLinus Torvalds { 8391da177e4SLinus Torvalds return (tmpl->saddr.a4 && 8401da177e4SLinus Torvalds tmpl->saddr.a4 != x->props.saddr.a4); 8411da177e4SLinus Torvalds } 8421da177e4SLinus Torvalds 8431da177e4SLinus Torvalds static inline int 8441da177e4SLinus Torvalds __xfrm6_state_addr_cmp(struct xfrm_tmpl *tmpl, struct xfrm_state *x) 8451da177e4SLinus Torvalds { 8461da177e4SLinus Torvalds return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) && 8471da177e4SLinus Torvalds ipv6_addr_cmp((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr)); 8481da177e4SLinus Torvalds } 8491da177e4SLinus Torvalds 8501da177e4SLinus Torvalds static inline int 8511da177e4SLinus Torvalds xfrm_state_addr_cmp(struct xfrm_tmpl *tmpl, struct xfrm_state *x, unsigned short family) 8521da177e4SLinus Torvalds { 8531da177e4SLinus Torvalds switch (family) { 8541da177e4SLinus Torvalds case AF_INET: 8551da177e4SLinus Torvalds return __xfrm4_state_addr_cmp(tmpl, x); 8561da177e4SLinus Torvalds case AF_INET6: 8571da177e4SLinus Torvalds return __xfrm6_state_addr_cmp(tmpl, x); 8581da177e4SLinus Torvalds } 8591da177e4SLinus Torvalds return !0; 8601da177e4SLinus Torvalds } 8611da177e4SLinus Torvalds 8621da177e4SLinus Torvalds #ifdef CONFIG_XFRM 8631da177e4SLinus Torvalds extern int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb, unsigned short family); 8641da177e4SLinus Torvalds 865d5422efeSHerbert Xu static inline int __xfrm_policy_check2(struct sock *sk, int dir, 866d5422efeSHerbert Xu struct sk_buff *skb, 867d5422efeSHerbert Xu unsigned int family, int reverse) 8681da177e4SLinus Torvalds { 869d5422efeSHerbert Xu int ndir = dir | (reverse ? XFRM_POLICY_MASK + 1 : 0); 870d5422efeSHerbert Xu 8711da177e4SLinus Torvalds if (sk && sk->sk_policy[XFRM_POLICY_IN]) 872d5422efeSHerbert Xu return __xfrm_policy_check(sk, ndir, skb, family); 8731da177e4SLinus Torvalds 8742518c7c2SDavid S. Miller return (!xfrm_policy_count[dir] && !skb->sp) || 8751da177e4SLinus Torvalds (skb->dst->flags & DST_NOPOLICY) || 876d5422efeSHerbert Xu __xfrm_policy_check(sk, ndir, skb, family); 877d5422efeSHerbert Xu } 878d5422efeSHerbert Xu 879d5422efeSHerbert Xu static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) 880d5422efeSHerbert Xu { 881d5422efeSHerbert Xu return __xfrm_policy_check2(sk, dir, skb, family, 0); 8821da177e4SLinus Torvalds } 8831da177e4SLinus Torvalds 8841da177e4SLinus Torvalds static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 8851da177e4SLinus Torvalds { 8861da177e4SLinus Torvalds return xfrm_policy_check(sk, dir, skb, AF_INET); 8871da177e4SLinus Torvalds } 8881da177e4SLinus Torvalds 8891da177e4SLinus Torvalds static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 8901da177e4SLinus Torvalds { 8911da177e4SLinus Torvalds return xfrm_policy_check(sk, dir, skb, AF_INET6); 8921da177e4SLinus Torvalds } 8931da177e4SLinus Torvalds 894d5422efeSHerbert Xu static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir, 895d5422efeSHerbert Xu struct sk_buff *skb) 896d5422efeSHerbert Xu { 897d5422efeSHerbert Xu return __xfrm_policy_check2(sk, dir, skb, AF_INET, 1); 898d5422efeSHerbert Xu } 899d5422efeSHerbert Xu 900d5422efeSHerbert Xu static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir, 901d5422efeSHerbert Xu struct sk_buff *skb) 902d5422efeSHerbert Xu { 903d5422efeSHerbert Xu return __xfrm_policy_check2(sk, dir, skb, AF_INET6, 1); 904d5422efeSHerbert Xu } 905d5422efeSHerbert Xu 906d5422efeSHerbert Xu extern int __xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, 907d5422efeSHerbert Xu unsigned int family, int reverse); 908d5422efeSHerbert Xu 909d5422efeSHerbert Xu static inline int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, 910d5422efeSHerbert Xu unsigned int family) 911d5422efeSHerbert Xu { 912d5422efeSHerbert Xu return __xfrm_decode_session(skb, fl, family, 0); 913d5422efeSHerbert Xu } 914d5422efeSHerbert Xu 915d5422efeSHerbert Xu static inline int xfrm_decode_session_reverse(struct sk_buff *skb, 916d5422efeSHerbert Xu struct flowi *fl, 917d5422efeSHerbert Xu unsigned int family) 918d5422efeSHerbert Xu { 919d5422efeSHerbert Xu return __xfrm_decode_session(skb, fl, family, 1); 920d5422efeSHerbert Xu } 921d5422efeSHerbert Xu 9221da177e4SLinus Torvalds extern int __xfrm_route_forward(struct sk_buff *skb, unsigned short family); 9231da177e4SLinus Torvalds 9241da177e4SLinus Torvalds static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family) 9251da177e4SLinus Torvalds { 9262518c7c2SDavid S. Miller return !xfrm_policy_count[XFRM_POLICY_OUT] || 9271da177e4SLinus Torvalds (skb->dst->flags & DST_NOXFRM) || 9281da177e4SLinus Torvalds __xfrm_route_forward(skb, family); 9291da177e4SLinus Torvalds } 9301da177e4SLinus Torvalds 9311da177e4SLinus Torvalds static inline int xfrm4_route_forward(struct sk_buff *skb) 9321da177e4SLinus Torvalds { 9331da177e4SLinus Torvalds return xfrm_route_forward(skb, AF_INET); 9341da177e4SLinus Torvalds } 9351da177e4SLinus Torvalds 9361da177e4SLinus Torvalds static inline int xfrm6_route_forward(struct sk_buff *skb) 9371da177e4SLinus Torvalds { 9381da177e4SLinus Torvalds return xfrm_route_forward(skb, AF_INET6); 9391da177e4SLinus Torvalds } 9401da177e4SLinus Torvalds 9411da177e4SLinus Torvalds extern int __xfrm_sk_clone_policy(struct sock *sk); 9421da177e4SLinus Torvalds 9431da177e4SLinus Torvalds static inline int xfrm_sk_clone_policy(struct sock *sk) 9441da177e4SLinus Torvalds { 9451da177e4SLinus Torvalds if (unlikely(sk->sk_policy[0] || sk->sk_policy[1])) 9461da177e4SLinus Torvalds return __xfrm_sk_clone_policy(sk); 9471da177e4SLinus Torvalds return 0; 9481da177e4SLinus Torvalds } 9491da177e4SLinus Torvalds 9504666faabSHerbert Xu extern int xfrm_policy_delete(struct xfrm_policy *pol, int dir); 9511da177e4SLinus Torvalds 9521da177e4SLinus Torvalds static inline void xfrm_sk_free_policy(struct sock *sk) 9531da177e4SLinus Torvalds { 9541da177e4SLinus Torvalds if (unlikely(sk->sk_policy[0] != NULL)) { 9551da177e4SLinus Torvalds xfrm_policy_delete(sk->sk_policy[0], XFRM_POLICY_MAX); 9561da177e4SLinus Torvalds sk->sk_policy[0] = NULL; 9571da177e4SLinus Torvalds } 9581da177e4SLinus Torvalds if (unlikely(sk->sk_policy[1] != NULL)) { 9591da177e4SLinus Torvalds xfrm_policy_delete(sk->sk_policy[1], XFRM_POLICY_MAX+1); 9601da177e4SLinus Torvalds sk->sk_policy[1] = NULL; 9611da177e4SLinus Torvalds } 9621da177e4SLinus Torvalds } 9631da177e4SLinus Torvalds 9641da177e4SLinus Torvalds #else 9651da177e4SLinus Torvalds 9661da177e4SLinus Torvalds static inline void xfrm_sk_free_policy(struct sock *sk) {} 9671da177e4SLinus Torvalds static inline int xfrm_sk_clone_policy(struct sock *sk) { return 0; } 9681da177e4SLinus Torvalds static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; } 9691da177e4SLinus Torvalds static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; } 9701da177e4SLinus Torvalds static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 9711da177e4SLinus Torvalds { 9721da177e4SLinus Torvalds return 1; 9731da177e4SLinus Torvalds } 9741da177e4SLinus Torvalds static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 9751da177e4SLinus Torvalds { 9761da177e4SLinus Torvalds return 1; 9771da177e4SLinus Torvalds } 9781da177e4SLinus Torvalds static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) 9791da177e4SLinus Torvalds { 9801da177e4SLinus Torvalds return 1; 9811da177e4SLinus Torvalds } 982d5422efeSHerbert Xu static inline int xfrm_decode_session_reverse(struct sk_buff *skb, 983d5422efeSHerbert Xu struct flowi *fl, 984d5422efeSHerbert Xu unsigned int family) 985d5422efeSHerbert Xu { 986d5422efeSHerbert Xu return -ENOSYS; 987d5422efeSHerbert Xu } 988d5422efeSHerbert Xu static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir, 989d5422efeSHerbert Xu struct sk_buff *skb) 990d5422efeSHerbert Xu { 991d5422efeSHerbert Xu return 1; 992d5422efeSHerbert Xu } 993d5422efeSHerbert Xu static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir, 994d5422efeSHerbert Xu struct sk_buff *skb) 995d5422efeSHerbert Xu { 996d5422efeSHerbert Xu return 1; 997d5422efeSHerbert Xu } 9981da177e4SLinus Torvalds #endif 9991da177e4SLinus Torvalds 10001da177e4SLinus Torvalds static __inline__ 10011da177e4SLinus Torvalds xfrm_address_t *xfrm_flowi_daddr(struct flowi *fl, unsigned short family) 10021da177e4SLinus Torvalds { 10031da177e4SLinus Torvalds switch (family){ 10041da177e4SLinus Torvalds case AF_INET: 10051da177e4SLinus Torvalds return (xfrm_address_t *)&fl->fl4_dst; 10061da177e4SLinus Torvalds case AF_INET6: 10071da177e4SLinus Torvalds return (xfrm_address_t *)&fl->fl6_dst; 10081da177e4SLinus Torvalds } 10091da177e4SLinus Torvalds return NULL; 10101da177e4SLinus Torvalds } 10111da177e4SLinus Torvalds 10121da177e4SLinus Torvalds static __inline__ 10131da177e4SLinus Torvalds xfrm_address_t *xfrm_flowi_saddr(struct flowi *fl, unsigned short family) 10141da177e4SLinus Torvalds { 10151da177e4SLinus Torvalds switch (family){ 10161da177e4SLinus Torvalds case AF_INET: 10171da177e4SLinus Torvalds return (xfrm_address_t *)&fl->fl4_src; 10181da177e4SLinus Torvalds case AF_INET6: 10191da177e4SLinus Torvalds return (xfrm_address_t *)&fl->fl6_src; 10201da177e4SLinus Torvalds } 10211da177e4SLinus Torvalds return NULL; 10221da177e4SLinus Torvalds } 10231da177e4SLinus Torvalds 10241da177e4SLinus Torvalds static __inline__ int 10251da177e4SLinus Torvalds __xfrm4_state_addr_check(struct xfrm_state *x, 10261da177e4SLinus Torvalds xfrm_address_t *daddr, xfrm_address_t *saddr) 10271da177e4SLinus Torvalds { 10281da177e4SLinus Torvalds if (daddr->a4 == x->id.daddr.a4 && 10291da177e4SLinus Torvalds (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4)) 10301da177e4SLinus Torvalds return 1; 10311da177e4SLinus Torvalds return 0; 10321da177e4SLinus Torvalds } 10331da177e4SLinus Torvalds 10341da177e4SLinus Torvalds static __inline__ int 10351da177e4SLinus Torvalds __xfrm6_state_addr_check(struct xfrm_state *x, 10361da177e4SLinus Torvalds xfrm_address_t *daddr, xfrm_address_t *saddr) 10371da177e4SLinus Torvalds { 10381da177e4SLinus Torvalds if (!ipv6_addr_cmp((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) && 10391da177e4SLinus Torvalds (!ipv6_addr_cmp((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr)|| 10401da177e4SLinus Torvalds ipv6_addr_any((struct in6_addr *)saddr) || 10411da177e4SLinus Torvalds ipv6_addr_any((struct in6_addr *)&x->props.saddr))) 10421da177e4SLinus Torvalds return 1; 10431da177e4SLinus Torvalds return 0; 10441da177e4SLinus Torvalds } 10451da177e4SLinus Torvalds 10461da177e4SLinus Torvalds static __inline__ int 10471da177e4SLinus Torvalds xfrm_state_addr_check(struct xfrm_state *x, 10481da177e4SLinus Torvalds xfrm_address_t *daddr, xfrm_address_t *saddr, 10491da177e4SLinus Torvalds unsigned short family) 10501da177e4SLinus Torvalds { 10511da177e4SLinus Torvalds switch (family) { 10521da177e4SLinus Torvalds case AF_INET: 10531da177e4SLinus Torvalds return __xfrm4_state_addr_check(x, daddr, saddr); 10541da177e4SLinus Torvalds case AF_INET6: 10551da177e4SLinus Torvalds return __xfrm6_state_addr_check(x, daddr, saddr); 10561da177e4SLinus Torvalds } 10571da177e4SLinus Torvalds return 0; 10581da177e4SLinus Torvalds } 10591da177e4SLinus Torvalds 1060e53820deSMasahide NAKAMURA static __inline__ int 1061e53820deSMasahide NAKAMURA xfrm_state_addr_flow_check(struct xfrm_state *x, struct flowi *fl, 1062e53820deSMasahide NAKAMURA unsigned short family) 1063e53820deSMasahide NAKAMURA { 1064e53820deSMasahide NAKAMURA switch (family) { 1065e53820deSMasahide NAKAMURA case AF_INET: 1066e53820deSMasahide NAKAMURA return __xfrm4_state_addr_check(x, 1067e53820deSMasahide NAKAMURA (xfrm_address_t *)&fl->fl4_dst, 1068e53820deSMasahide NAKAMURA (xfrm_address_t *)&fl->fl4_src); 1069e53820deSMasahide NAKAMURA case AF_INET6: 1070e53820deSMasahide NAKAMURA return __xfrm6_state_addr_check(x, 1071e53820deSMasahide NAKAMURA (xfrm_address_t *)&fl->fl6_dst, 1072e53820deSMasahide NAKAMURA (xfrm_address_t *)&fl->fl6_src); 1073e53820deSMasahide NAKAMURA } 1074e53820deSMasahide NAKAMURA return 0; 1075e53820deSMasahide NAKAMURA } 1076e53820deSMasahide NAKAMURA 10771da177e4SLinus Torvalds static inline int xfrm_state_kern(struct xfrm_state *x) 10781da177e4SLinus Torvalds { 10791da177e4SLinus Torvalds return atomic_read(&x->tunnel_users); 10801da177e4SLinus Torvalds } 10811da177e4SLinus Torvalds 10825794708fSMasahide NAKAMURA static inline int xfrm_id_proto_match(u8 proto, u8 userproto) 10835794708fSMasahide NAKAMURA { 1084dc00a525SMasahide NAKAMURA return (!userproto || proto == userproto || 1085dc00a525SMasahide NAKAMURA (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH || 1086dc00a525SMasahide NAKAMURA proto == IPPROTO_ESP || 1087dc00a525SMasahide NAKAMURA proto == IPPROTO_COMP))); 10885794708fSMasahide NAKAMURA } 10895794708fSMasahide NAKAMURA 10901da177e4SLinus Torvalds /* 10911da177e4SLinus Torvalds * xfrm algorithm information 10921da177e4SLinus Torvalds */ 10931da177e4SLinus Torvalds struct xfrm_algo_auth_info { 10941da177e4SLinus Torvalds u16 icv_truncbits; 10951da177e4SLinus Torvalds u16 icv_fullbits; 10961da177e4SLinus Torvalds }; 10971da177e4SLinus Torvalds 10981da177e4SLinus Torvalds struct xfrm_algo_encr_info { 10991da177e4SLinus Torvalds u16 blockbits; 11001da177e4SLinus Torvalds u16 defkeybits; 11011da177e4SLinus Torvalds }; 11021da177e4SLinus Torvalds 11031da177e4SLinus Torvalds struct xfrm_algo_comp_info { 11041da177e4SLinus Torvalds u16 threshold; 11051da177e4SLinus Torvalds }; 11061da177e4SLinus Torvalds 11071da177e4SLinus Torvalds struct xfrm_algo_desc { 11081da177e4SLinus Torvalds char *name; 110904ff1260SHerbert Xu char *compat; 11101da177e4SLinus Torvalds u8 available:1; 11111da177e4SLinus Torvalds union { 11121da177e4SLinus Torvalds struct xfrm_algo_auth_info auth; 11131da177e4SLinus Torvalds struct xfrm_algo_encr_info encr; 11141da177e4SLinus Torvalds struct xfrm_algo_comp_info comp; 11151da177e4SLinus Torvalds } uinfo; 11161da177e4SLinus Torvalds struct sadb_alg desc; 11171da177e4SLinus Torvalds }; 11181da177e4SLinus Torvalds 11191da177e4SLinus Torvalds /* XFRM tunnel handlers. */ 11201da177e4SLinus Torvalds struct xfrm_tunnel { 11211da177e4SLinus Torvalds int (*handler)(struct sk_buff *skb); 1122d2acc347SHerbert Xu int (*err_handler)(struct sk_buff *skb, __u32 info); 1123d2acc347SHerbert Xu 1124d2acc347SHerbert Xu struct xfrm_tunnel *next; 1125d2acc347SHerbert Xu int priority; 11261da177e4SLinus Torvalds }; 11271da177e4SLinus Torvalds 11281da177e4SLinus Torvalds struct xfrm6_tunnel { 1129d2acc347SHerbert Xu int (*handler)(struct sk_buff *skb); 1130d2acc347SHerbert Xu int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt, 113104ce6909SAl Viro int type, int code, int offset, __be32 info); 1132d2acc347SHerbert Xu struct xfrm6_tunnel *next; 1133d2acc347SHerbert Xu int priority; 11341da177e4SLinus Torvalds }; 11351da177e4SLinus Torvalds 11361da177e4SLinus Torvalds extern void xfrm_init(void); 11371da177e4SLinus Torvalds extern void xfrm4_init(void); 11381da177e4SLinus Torvalds extern void xfrm_state_init(void); 11391da177e4SLinus Torvalds extern void xfrm4_state_init(void); 1140c35b7e72SDaniel Lezcano #ifdef CONFIG_XFRM 1141c35b7e72SDaniel Lezcano extern int xfrm6_init(void); 1142c35b7e72SDaniel Lezcano extern void xfrm6_fini(void); 11430013cabaSDaniel Lezcano extern int xfrm6_state_init(void); 11441da177e4SLinus Torvalds extern void xfrm6_state_fini(void); 1145c35b7e72SDaniel Lezcano #else 1146c35b7e72SDaniel Lezcano static inline int xfrm6_init(void) 1147c35b7e72SDaniel Lezcano { 1148c35b7e72SDaniel Lezcano return 0; 1149c35b7e72SDaniel Lezcano } 1150c35b7e72SDaniel Lezcano static inline void xfrm6_fini(void) 1151c35b7e72SDaniel Lezcano { 1152c35b7e72SDaniel Lezcano ; 1153c35b7e72SDaniel Lezcano } 1154c35b7e72SDaniel Lezcano #endif 11551da177e4SLinus Torvalds 1156558f82efSMasahide NAKAMURA #ifdef CONFIG_XFRM_STATISTICS 1157558f82efSMasahide NAKAMURA extern int xfrm_proc_init(void); 1158558f82efSMasahide NAKAMURA #endif 1159558f82efSMasahide NAKAMURA 11601da177e4SLinus Torvalds extern int xfrm_state_walk(u8 proto, int (*func)(struct xfrm_state *, int, void*), void *); 11611da177e4SLinus Torvalds extern struct xfrm_state *xfrm_state_alloc(void); 11621da177e4SLinus Torvalds extern struct xfrm_state *xfrm_state_find(xfrm_address_t *daddr, xfrm_address_t *saddr, 11631da177e4SLinus Torvalds struct flowi *fl, struct xfrm_tmpl *tmpl, 11641da177e4SLinus Torvalds struct xfrm_policy *pol, int *err, 11651da177e4SLinus Torvalds unsigned short family); 1166628529b6SJamal Hadi Salim extern struct xfrm_state * xfrm_stateonly_find(xfrm_address_t *daddr, 1167628529b6SJamal Hadi Salim xfrm_address_t *saddr, 1168628529b6SJamal Hadi Salim unsigned short family, 1169628529b6SJamal Hadi Salim u8 mode, u8 proto, u32 reqid); 11701da177e4SLinus Torvalds extern int xfrm_state_check_expire(struct xfrm_state *x); 11711da177e4SLinus Torvalds extern void xfrm_state_insert(struct xfrm_state *x); 11721da177e4SLinus Torvalds extern int xfrm_state_add(struct xfrm_state *x); 11731da177e4SLinus Torvalds extern int xfrm_state_update(struct xfrm_state *x); 1174a94cfd19SAl Viro extern struct xfrm_state *xfrm_state_lookup(xfrm_address_t *daddr, __be32 spi, u8 proto, unsigned short family); 1175eb2971b6SMasahide NAKAMURA extern struct xfrm_state *xfrm_state_lookup_byaddr(xfrm_address_t *daddr, xfrm_address_t *saddr, u8 proto, unsigned short family); 117641a49cc3SMasahide NAKAMURA #ifdef CONFIG_XFRM_SUB_POLICY 117741a49cc3SMasahide NAKAMURA extern int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, 117841a49cc3SMasahide NAKAMURA int n, unsigned short family); 117941a49cc3SMasahide NAKAMURA extern int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, 118041a49cc3SMasahide NAKAMURA int n, unsigned short family); 118141a49cc3SMasahide NAKAMURA #else 118241a49cc3SMasahide NAKAMURA static inline int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, 118341a49cc3SMasahide NAKAMURA int n, unsigned short family) 118441a49cc3SMasahide NAKAMURA { 118541a49cc3SMasahide NAKAMURA return -ENOSYS; 118641a49cc3SMasahide NAKAMURA } 118741a49cc3SMasahide NAKAMURA 118841a49cc3SMasahide NAKAMURA static inline int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, 118941a49cc3SMasahide NAKAMURA int n, unsigned short family) 119041a49cc3SMasahide NAKAMURA { 119141a49cc3SMasahide NAKAMURA return -ENOSYS; 119241a49cc3SMasahide NAKAMURA } 119341a49cc3SMasahide NAKAMURA #endif 1194af11e316SJamal Hadi Salim 1195af11e316SJamal Hadi Salim struct xfrmk_sadinfo { 1196af11e316SJamal Hadi Salim u32 sadhcnt; /* current hash bkts */ 1197af11e316SJamal Hadi Salim u32 sadhmcnt; /* max allowed hash bkts */ 1198af11e316SJamal Hadi Salim u32 sadcnt; /* current running count */ 1199af11e316SJamal Hadi Salim }; 1200af11e316SJamal Hadi Salim 12015a6d3416SJamal Hadi Salim struct xfrmk_spdinfo { 12025a6d3416SJamal Hadi Salim u32 incnt; 12035a6d3416SJamal Hadi Salim u32 outcnt; 12045a6d3416SJamal Hadi Salim u32 fwdcnt; 12055a6d3416SJamal Hadi Salim u32 inscnt; 12065a6d3416SJamal Hadi Salim u32 outscnt; 12075a6d3416SJamal Hadi Salim u32 fwdscnt; 12085a6d3416SJamal Hadi Salim u32 spdhcnt; 12095a6d3416SJamal Hadi Salim u32 spdhmcnt; 12105a6d3416SJamal Hadi Salim }; 12115a6d3416SJamal Hadi Salim 12121da177e4SLinus Torvalds extern struct xfrm_state *xfrm_find_acq_byseq(u32 seq); 121326b15dadSJamal Hadi Salim extern int xfrm_state_delete(struct xfrm_state *x); 12144aa2e62cSJoy Latten extern int xfrm_state_flush(u8 proto, struct xfrm_audit *audit_info); 1215af11e316SJamal Hadi Salim extern void xfrm_sad_getinfo(struct xfrmk_sadinfo *si); 12165a6d3416SJamal Hadi Salim extern void xfrm_spd_getinfo(struct xfrmk_spdinfo *si); 1217a252cc23SAl Viro extern int xfrm_replay_check(struct xfrm_state *x, __be32 seq); 121861f4627bSAl Viro extern void xfrm_replay_advance(struct xfrm_state *x, __be32 seq); 1219f8cd5488SJamal Hadi Salim extern void xfrm_replay_notify(struct xfrm_state *x, int event); 12201da177e4SLinus Torvalds extern int xfrm_state_mtu(struct xfrm_state *x, int mtu); 122172cb6962SHerbert Xu extern int xfrm_init_state(struct xfrm_state *x); 1222227620e2SHerbert Xu extern int xfrm_prepare_input(struct xfrm_state *x, struct sk_buff *skb); 1223716062fdSHerbert Xu extern int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, 1224716062fdSHerbert Xu int encap_type); 12251bf06cd2SHerbert Xu extern int xfrm_input_resume(struct sk_buff *skb, int nexthdr); 1226c6581a45SHerbert Xu extern int xfrm_output_resume(struct sk_buff *skb, int err); 1227406ef77cSHerbert Xu extern int xfrm_output(struct sk_buff *skb); 122836cf9acfSHerbert Xu extern int xfrm4_extract_header(struct sk_buff *skb); 1229227620e2SHerbert Xu extern int xfrm4_extract_input(struct xfrm_state *x, struct sk_buff *skb); 1230c4541b41SHerbert Xu extern int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi, 1231c4541b41SHerbert Xu int encap_type); 1232716062fdSHerbert Xu extern int xfrm4_transport_finish(struct sk_buff *skb, int async); 12331da177e4SLinus Torvalds extern int xfrm4_rcv(struct sk_buff *skb); 1234c4541b41SHerbert Xu 1235c4541b41SHerbert Xu static inline int xfrm4_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi) 1236c4541b41SHerbert Xu { 1237c4541b41SHerbert Xu return xfrm4_rcv_encap(skb, nexthdr, spi, 0); 1238c4541b41SHerbert Xu } 1239c4541b41SHerbert Xu 124036cf9acfSHerbert Xu extern int xfrm4_extract_output(struct xfrm_state *x, struct sk_buff *skb); 124136cf9acfSHerbert Xu extern int xfrm4_prepare_output(struct xfrm_state *x, struct sk_buff *skb); 12421da177e4SLinus Torvalds extern int xfrm4_output(struct sk_buff *skb); 1243c0d56408SKazunori MIYAZAWA extern int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family); 1244c0d56408SKazunori MIYAZAWA extern int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family); 124536cf9acfSHerbert Xu extern int xfrm6_extract_header(struct sk_buff *skb); 1246227620e2SHerbert Xu extern int xfrm6_extract_input(struct xfrm_state *x, struct sk_buff *skb); 124733b5ecb8SHerbert Xu extern int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi); 1248716062fdSHerbert Xu extern int xfrm6_transport_finish(struct sk_buff *skb, int async); 1249e5bbef20SHerbert Xu extern int xfrm6_rcv(struct sk_buff *skb); 1250fbd9a5b4SMasahide NAKAMURA extern int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr, 1251fbd9a5b4SMasahide NAKAMURA xfrm_address_t *saddr, u8 proto); 125273d605d1SKazunori MIYAZAWA extern int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family); 125373d605d1SKazunori MIYAZAWA extern int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family); 12548c689a6eSAl Viro extern __be32 xfrm6_tunnel_alloc_spi(xfrm_address_t *saddr); 12551da177e4SLinus Torvalds extern void xfrm6_tunnel_free_spi(xfrm_address_t *saddr); 12568c689a6eSAl Viro extern __be32 xfrm6_tunnel_spi_lookup(xfrm_address_t *saddr); 125736cf9acfSHerbert Xu extern int xfrm6_extract_output(struct xfrm_state *x, struct sk_buff *skb); 125836cf9acfSHerbert Xu extern int xfrm6_prepare_output(struct xfrm_state *x, struct sk_buff *skb); 12591da177e4SLinus Torvalds extern int xfrm6_output(struct sk_buff *skb); 1260aee5adb4SMasahide NAKAMURA extern int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb, 1261aee5adb4SMasahide NAKAMURA u8 **prevhdr); 12621da177e4SLinus Torvalds 12631da177e4SLinus Torvalds #ifdef CONFIG_XFRM 1264067b207bSJames Chapman extern int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb); 12651da177e4SLinus Torvalds extern int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen); 12661da177e4SLinus Torvalds #else 12671da177e4SLinus Torvalds static inline int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen) 12681da177e4SLinus Torvalds { 12691da177e4SLinus Torvalds return -ENOPROTOOPT; 12701da177e4SLinus Torvalds } 12711da177e4SLinus Torvalds 1272067b207bSJames Chapman static inline int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb) 12731da177e4SLinus Torvalds { 12741da177e4SLinus Torvalds /* should not happen */ 12751da177e4SLinus Torvalds kfree_skb(skb); 12761da177e4SLinus Torvalds return 0; 12771da177e4SLinus Torvalds } 12781da177e4SLinus Torvalds #endif 12791da177e4SLinus Torvalds 1280dd0fc66fSAl Viro struct xfrm_policy *xfrm_policy_alloc(gfp_t gfp); 12814e81bb83SMasahide NAKAMURA extern int xfrm_policy_walk(u8 type, int (*func)(struct xfrm_policy *, int, int, void*), void *); 12821da177e4SLinus Torvalds int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl); 12834e81bb83SMasahide NAKAMURA struct xfrm_policy *xfrm_policy_bysel_ctx(u8 type, int dir, 12844e81bb83SMasahide NAKAMURA struct xfrm_selector *sel, 1285ef41aaa0SEric Paris struct xfrm_sec_ctx *ctx, int delete, 1286ef41aaa0SEric Paris int *err); 1287ef41aaa0SEric Paris struct xfrm_policy *xfrm_policy_byid(u8, int dir, u32 id, int delete, int *err); 12884aa2e62cSJoy Latten int xfrm_policy_flush(u8 type, struct xfrm_audit *audit_info); 12891da177e4SLinus Torvalds u32 xfrm_get_acqseq(void); 1290658b219eSHerbert Xu extern int xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi); 12911da177e4SLinus Torvalds struct xfrm_state * xfrm_find_acq(u8 mode, u32 reqid, u8 proto, 12921da177e4SLinus Torvalds xfrm_address_t *daddr, xfrm_address_t *saddr, 12931da177e4SLinus Torvalds int create, unsigned short family); 12944aa2e62cSJoy Latten extern int xfrm_policy_flush(u8 type, struct xfrm_audit *audit_info); 12951da177e4SLinus Torvalds extern int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol); 12965b368e61SVenkat Yekkirala extern int xfrm_bundle_ok(struct xfrm_policy *pol, struct xfrm_dst *xdst, 12975b368e61SVenkat Yekkirala struct flowi *fl, int family, int strict); 12981da177e4SLinus Torvalds 129980c9abaaSShinta Sugimoto #ifdef CONFIG_XFRM_MIGRATE 130080c9abaaSShinta Sugimoto extern int km_migrate(struct xfrm_selector *sel, u8 dir, u8 type, 130180c9abaaSShinta Sugimoto struct xfrm_migrate *m, int num_bundles); 130280c9abaaSShinta Sugimoto extern struct xfrm_state * xfrm_migrate_state_find(struct xfrm_migrate *m); 130380c9abaaSShinta Sugimoto extern struct xfrm_state * xfrm_state_migrate(struct xfrm_state *x, 130480c9abaaSShinta Sugimoto struct xfrm_migrate *m); 130580c9abaaSShinta Sugimoto extern int xfrm_migrate(struct xfrm_selector *sel, u8 dir, u8 type, 130680c9abaaSShinta Sugimoto struct xfrm_migrate *m, int num_bundles); 130780c9abaaSShinta Sugimoto #endif 130880c9abaaSShinta Sugimoto 13091da177e4SLinus Torvalds extern wait_queue_head_t km_waitq; 13105d36b180SAl Viro extern int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); 13116c5c8ca7SJamal Hadi Salim extern void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 pid); 131297a64b45SMasahide NAKAMURA extern int km_report(u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr); 13131da177e4SLinus Torvalds 13141da177e4SLinus Torvalds extern void xfrm_input_init(void); 13156067b2baSAl Viro extern int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq); 13161da177e4SLinus Torvalds 13171da177e4SLinus Torvalds extern void xfrm_probe_algs(void); 13181da177e4SLinus Torvalds extern int xfrm_count_auth_supported(void); 13191da177e4SLinus Torvalds extern int xfrm_count_enc_supported(void); 13201da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx); 13211da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx); 13221da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id); 13231da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id); 13241da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id); 13251da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_aalg_get_byname(char *name, int probe); 13261da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_ealg_get_byname(char *name, int probe); 13271da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_calg_get_byname(char *name, int probe); 13281da177e4SLinus Torvalds 132907d4ee58SHerbert Xu struct hash_desc; 13309409f38aSHerbert Xu struct scatterlist; 133107d4ee58SHerbert Xu typedef int (icv_update_fn_t)(struct hash_desc *, struct scatterlist *, 133207d4ee58SHerbert Xu unsigned int); 13331da177e4SLinus Torvalds 133407d4ee58SHerbert Xu extern int skb_icv_walk(const struct sk_buff *skb, struct hash_desc *tfm, 13351da177e4SLinus Torvalds int offset, int len, icv_update_fn_t icv_update); 13361da177e4SLinus Torvalds 13371da177e4SLinus Torvalds static inline int xfrm_addr_cmp(xfrm_address_t *a, xfrm_address_t *b, 13381da177e4SLinus Torvalds int family) 13391da177e4SLinus Torvalds { 13401da177e4SLinus Torvalds switch (family) { 13411da177e4SLinus Torvalds default: 13421da177e4SLinus Torvalds case AF_INET: 13438c689a6eSAl Viro return (__force __u32)a->a4 - (__force __u32)b->a4; 13441da177e4SLinus Torvalds case AF_INET6: 13451da177e4SLinus Torvalds return ipv6_addr_cmp((struct in6_addr *)a, 13461da177e4SLinus Torvalds (struct in6_addr *)b); 13471da177e4SLinus Torvalds } 13481da177e4SLinus Torvalds } 13491da177e4SLinus Torvalds 135077d8d7a6SHerbert Xu static inline int xfrm_policy_id2dir(u32 index) 135177d8d7a6SHerbert Xu { 135277d8d7a6SHerbert Xu return index & 7; 135377d8d7a6SHerbert Xu } 135477d8d7a6SHerbert Xu 1355f8cd5488SJamal Hadi Salim static inline int xfrm_aevent_is_on(void) 1356f8cd5488SJamal Hadi Salim { 1357be33690dSPatrick McHardy struct sock *nlsk; 1358be33690dSPatrick McHardy int ret = 0; 1359be33690dSPatrick McHardy 1360be33690dSPatrick McHardy rcu_read_lock(); 1361be33690dSPatrick McHardy nlsk = rcu_dereference(xfrm_nl); 1362be33690dSPatrick McHardy if (nlsk) 1363be33690dSPatrick McHardy ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS); 1364be33690dSPatrick McHardy rcu_read_unlock(); 1365be33690dSPatrick McHardy return ret; 1366f8cd5488SJamal Hadi Salim } 1367f8cd5488SJamal Hadi Salim 13680f99be0dSEric Dumazet static inline int xfrm_alg_len(struct xfrm_algo *alg) 13690f99be0dSEric Dumazet { 13700f99be0dSEric Dumazet return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); 13710f99be0dSEric Dumazet } 13720f99be0dSEric Dumazet 137380c9abaaSShinta Sugimoto #ifdef CONFIG_XFRM_MIGRATE 137480c9abaaSShinta Sugimoto static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig) 137580c9abaaSShinta Sugimoto { 13760f99be0dSEric Dumazet return kmemdup(orig, xfrm_alg_len(orig), GFP_KERNEL); 137780c9abaaSShinta Sugimoto } 137880c9abaaSShinta Sugimoto 137980c9abaaSShinta Sugimoto static inline void xfrm_states_put(struct xfrm_state **states, int n) 138080c9abaaSShinta Sugimoto { 138180c9abaaSShinta Sugimoto int i; 138280c9abaaSShinta Sugimoto for (i = 0; i < n; i++) 138380c9abaaSShinta Sugimoto xfrm_state_put(*(states + i)); 138480c9abaaSShinta Sugimoto } 138580c9abaaSShinta Sugimoto 138680c9abaaSShinta Sugimoto static inline void xfrm_states_delete(struct xfrm_state **states, int n) 138780c9abaaSShinta Sugimoto { 138880c9abaaSShinta Sugimoto int i; 138980c9abaaSShinta Sugimoto for (i = 0; i < n; i++) 139080c9abaaSShinta Sugimoto xfrm_state_delete(*(states + i)); 139180c9abaaSShinta Sugimoto } 139280c9abaaSShinta Sugimoto #endif 1393f8cd5488SJamal Hadi Salim 139400501121SHerbert Xu static inline struct xfrm_state *xfrm_input_state(struct sk_buff *skb) 139500501121SHerbert Xu { 139600501121SHerbert Xu return skb->sp->xvec[skb->sp->len - 1]; 139700501121SHerbert Xu } 139800501121SHerbert Xu 13991da177e4SLinus Torvalds #endif /* _NET_XFRM_H */ 1400