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> 155a0e3ad6STejun Heo #include <linux/slab.h> 161da177e4SLinus Torvalds 171da177e4SLinus Torvalds #include <net/sock.h> 181da177e4SLinus Torvalds #include <net/dst.h> 19436a0a40SHerbert Xu #include <net/ip.h> 201da177e4SLinus Torvalds #include <net/route.h> 211da177e4SLinus Torvalds #include <net/ipv6.h> 221da177e4SLinus Torvalds #include <net/ip6_fib.h> 23fe1a5f03STimo Teräs #include <net/flow.h> 249e0d57fdSYury Polyanskiy 259e0d57fdSYury Polyanskiy #include <linux/interrupt.h> 269e0d57fdSYury Polyanskiy 27558f82efSMasahide NAKAMURA #ifdef CONFIG_XFRM_STATISTICS 28558f82efSMasahide NAKAMURA #include <net/snmp.h> 29558f82efSMasahide NAKAMURA #endif 301da177e4SLinus Torvalds 31d3d6dd3aSMasahide NAKAMURA #define XFRM_PROTO_ESP 50 32d3d6dd3aSMasahide NAKAMURA #define XFRM_PROTO_AH 51 33d3d6dd3aSMasahide NAKAMURA #define XFRM_PROTO_COMP 108 34d3d6dd3aSMasahide NAKAMURA #define XFRM_PROTO_IPIP 4 35d3d6dd3aSMasahide NAKAMURA #define XFRM_PROTO_IPV6 41 36d3d6dd3aSMasahide NAKAMURA #define XFRM_PROTO_ROUTING IPPROTO_ROUTING 37d3d6dd3aSMasahide NAKAMURA #define XFRM_PROTO_DSTOPTS IPPROTO_DSTOPTS 38d3d6dd3aSMasahide NAKAMURA 391da177e4SLinus Torvalds #define XFRM_ALIGN8(len) (((len) + 7) & ~7) 40b59f45d0SHerbert Xu #define MODULE_ALIAS_XFRM_MODE(family, encap) \ 41b59f45d0SHerbert Xu MODULE_ALIAS("xfrm-mode-" __stringify(family) "-" __stringify(encap)) 42d3d6dd3aSMasahide NAKAMURA #define MODULE_ALIAS_XFRM_TYPE(family, proto) \ 43d3d6dd3aSMasahide NAKAMURA MODULE_ALIAS("xfrm-type-" __stringify(family) "-" __stringify(proto)) 441da177e4SLinus Torvalds 45558f82efSMasahide NAKAMURA #ifdef CONFIG_XFRM_STATISTICS 4659c9940eSAlexey Dobriyan #define XFRM_INC_STATS(net, field) SNMP_INC_STATS((net)->mib.xfrm_statistics, field) 4759c9940eSAlexey Dobriyan #define XFRM_INC_STATS_BH(net, field) SNMP_INC_STATS_BH((net)->mib.xfrm_statistics, field) 4859c9940eSAlexey Dobriyan #define XFRM_INC_STATS_USER(net, field) SNMP_INC_STATS_USER((net)-mib.xfrm_statistics, field) 49558f82efSMasahide NAKAMURA #else 5059c9940eSAlexey Dobriyan #define XFRM_INC_STATS(net, field) ((void)(net)) 5159c9940eSAlexey Dobriyan #define XFRM_INC_STATS_BH(net, field) ((void)(net)) 5259c9940eSAlexey Dobriyan #define XFRM_INC_STATS_USER(net, field) ((void)(net)) 53558f82efSMasahide NAKAMURA #endif 54558f82efSMasahide NAKAMURA 554a3e2f71SArjan van de Ven extern struct mutex xfrm_cfg_mutex; 561da177e4SLinus Torvalds 571da177e4SLinus Torvalds /* Organization of SPD aka "XFRM rules" 581da177e4SLinus Torvalds ------------------------------------ 591da177e4SLinus Torvalds 601da177e4SLinus Torvalds Basic objects: 611da177e4SLinus Torvalds - policy rule, struct xfrm_policy (=SPD entry) 621da177e4SLinus Torvalds - bundle of transformations, struct dst_entry == struct xfrm_dst (=SA bundle) 631da177e4SLinus Torvalds - instance of a transformer, struct xfrm_state (=SA) 641da177e4SLinus Torvalds - template to clone xfrm_state, struct xfrm_tmpl 651da177e4SLinus Torvalds 661da177e4SLinus Torvalds SPD is plain linear list of xfrm_policy rules, ordered by priority. 671da177e4SLinus Torvalds (To be compatible with existing pfkeyv2 implementations, 681da177e4SLinus Torvalds many rules with priority of 0x7fffffff are allowed to exist and 691da177e4SLinus Torvalds such rules are ordered in an unpredictable way, thanks to bsd folks.) 701da177e4SLinus Torvalds 711da177e4SLinus Torvalds Lookup is plain linear search until the first match with selector. 721da177e4SLinus Torvalds 731da177e4SLinus Torvalds If "action" is "block", then we prohibit the flow, otherwise: 741da177e4SLinus Torvalds if "xfrms_nr" is zero, the flow passes untransformed. Otherwise, 751da177e4SLinus Torvalds policy entry has list of up to XFRM_MAX_DEPTH transformations, 761da177e4SLinus Torvalds described by templates xfrm_tmpl. Each template is resolved 771da177e4SLinus Torvalds to a complete xfrm_state (see below) and we pack bundle of transformations 781da177e4SLinus Torvalds to a dst_entry returned to requestor. 791da177e4SLinus Torvalds 801da177e4SLinus Torvalds dst -. xfrm .-> xfrm_state #1 811da177e4SLinus Torvalds |---. child .-> dst -. xfrm .-> xfrm_state #2 821da177e4SLinus Torvalds |---. child .-> dst -. xfrm .-> xfrm_state #3 831da177e4SLinus Torvalds |---. child .-> NULL 841da177e4SLinus Torvalds 851da177e4SLinus Torvalds Bundles are cached at xrfm_policy struct (field ->bundles). 861da177e4SLinus Torvalds 871da177e4SLinus Torvalds 881da177e4SLinus Torvalds Resolution of xrfm_tmpl 891da177e4SLinus Torvalds ----------------------- 901da177e4SLinus Torvalds Template contains: 911da177e4SLinus Torvalds 1. ->mode Mode: transport or tunnel 921da177e4SLinus Torvalds 2. ->id.proto Protocol: AH/ESP/IPCOMP 931da177e4SLinus Torvalds 3. ->id.daddr Remote tunnel endpoint, ignored for transport mode. 941da177e4SLinus Torvalds Q: allow to resolve security gateway? 951da177e4SLinus Torvalds 4. ->id.spi If not zero, static SPI. 961da177e4SLinus Torvalds 5. ->saddr Local tunnel endpoint, ignored for transport mode. 971da177e4SLinus Torvalds 6. ->algos List of allowed algos. Plain bitmask now. 981da177e4SLinus Torvalds Q: ealgos, aalgos, calgos. What a mess... 991da177e4SLinus Torvalds 7. ->share Sharing mode. 1001da177e4SLinus Torvalds Q: how to implement private sharing mode? To add struct sock* to 1011da177e4SLinus Torvalds flow id? 1021da177e4SLinus Torvalds 1031da177e4SLinus Torvalds Having this template we search through SAD searching for entries 1041da177e4SLinus Torvalds with appropriate mode/proto/algo, permitted by selector. 1051da177e4SLinus Torvalds If no appropriate entry found, it is requested from key manager. 1061da177e4SLinus Torvalds 1071da177e4SLinus Torvalds PROBLEMS: 1081da177e4SLinus Torvalds Q: How to find all the bundles referring to a physical path for 1091da177e4SLinus Torvalds PMTU discovery? Seems, dst should contain list of all parents... 1101da177e4SLinus Torvalds and enter to infinite locking hierarchy disaster. 1111da177e4SLinus Torvalds No! It is easier, we will not search for them, let them find us. 1121da177e4SLinus Torvalds We add genid to each dst plus pointer to genid of raw IP route, 1131da177e4SLinus Torvalds pmtu disc will update pmtu on raw IP route and increase its genid. 1141da177e4SLinus Torvalds dst_check() will see this for top level and trigger resyncing 1151da177e4SLinus Torvalds metrics. Plus, it will be made via sk->sk_dst_cache. Solved. 1161da177e4SLinus Torvalds */ 1171da177e4SLinus Torvalds 11812a169e7SHerbert Xu struct xfrm_state_walk { 11912a169e7SHerbert Xu struct list_head all; 12012a169e7SHerbert Xu u8 state; 12112a169e7SHerbert Xu union { 12212a169e7SHerbert Xu u8 dying; 12312a169e7SHerbert Xu u8 proto; 12412a169e7SHerbert Xu }; 12512a169e7SHerbert Xu u32 seq; 12612a169e7SHerbert Xu }; 12712a169e7SHerbert Xu 1281da177e4SLinus Torvalds /* Full description of state of transformer. */ 129fd2c3ef7SEric Dumazet struct xfrm_state { 130673c09beSAlexey Dobriyan #ifdef CONFIG_NET_NS 131673c09beSAlexey Dobriyan struct net *xs_net; 132673c09beSAlexey Dobriyan #endif 133abb81c4fSHerbert Xu union { 13412a169e7SHerbert Xu struct hlist_node gclist; 1358f126e37SDavid S. Miller struct hlist_node bydst; 136abb81c4fSHerbert Xu }; 1378f126e37SDavid S. Miller struct hlist_node bysrc; 1388f126e37SDavid S. Miller struct hlist_node byspi; 1391da177e4SLinus Torvalds 1401da177e4SLinus Torvalds atomic_t refcnt; 1411da177e4SLinus Torvalds spinlock_t lock; 1421da177e4SLinus Torvalds 1431da177e4SLinus Torvalds struct xfrm_id id; 1441da177e4SLinus Torvalds struct xfrm_selector sel; 145bf825f81SJamal Hadi Salim struct xfrm_mark mark; 1461da177e4SLinus Torvalds 1479d4a706dSDavid S. Miller u32 genid; 1489d4a706dSDavid S. Miller 14912a169e7SHerbert Xu /* Key manager bits */ 15012a169e7SHerbert Xu struct xfrm_state_walk km; 1511da177e4SLinus Torvalds 1521da177e4SLinus Torvalds /* Parameters of this state. */ 1531da177e4SLinus Torvalds struct { 1541da177e4SLinus Torvalds u32 reqid; 1551da177e4SLinus Torvalds u8 mode; 1561da177e4SLinus Torvalds u8 replay_window; 1571da177e4SLinus Torvalds u8 aalgo, ealgo, calgo; 1581da177e4SLinus Torvalds u8 flags; 1591da177e4SLinus Torvalds u16 family; 1601da177e4SLinus Torvalds xfrm_address_t saddr; 1611da177e4SLinus Torvalds int header_len; 1621da177e4SLinus Torvalds int trailer_len; 1631da177e4SLinus Torvalds } props; 1641da177e4SLinus Torvalds 1651da177e4SLinus Torvalds struct xfrm_lifetime_cfg lft; 1661da177e4SLinus Torvalds 1671da177e4SLinus Torvalds /* Data for transformer */ 1684447bb33SMartin Willi struct xfrm_algo_auth *aalg; 1691da177e4SLinus Torvalds struct xfrm_algo *ealg; 1701da177e4SLinus Torvalds struct xfrm_algo *calg; 1711a6509d9SHerbert Xu struct xfrm_algo_aead *aead; 1721da177e4SLinus Torvalds 1731da177e4SLinus Torvalds /* Data for encapsulator */ 1741da177e4SLinus Torvalds struct xfrm_encap_tmpl *encap; 1751da177e4SLinus Torvalds 176060f02a3SNoriaki TAKAMIYA /* Data for care-of address */ 177060f02a3SNoriaki TAKAMIYA xfrm_address_t *coaddr; 178060f02a3SNoriaki TAKAMIYA 1791da177e4SLinus Torvalds /* IPComp needs an IPIP tunnel for handling uncompressed packets */ 1801da177e4SLinus Torvalds struct xfrm_state *tunnel; 1811da177e4SLinus Torvalds 1821da177e4SLinus Torvalds /* If a tunnel, number of users + 1 */ 1831da177e4SLinus Torvalds atomic_t tunnel_users; 1841da177e4SLinus Torvalds 1851da177e4SLinus Torvalds /* State for replay detection */ 1861da177e4SLinus Torvalds struct xfrm_replay_state replay; 1871da177e4SLinus Torvalds 188f8cd5488SJamal Hadi Salim /* Replay detection state at the time we sent the last notification */ 189f8cd5488SJamal Hadi Salim struct xfrm_replay_state preplay; 190f8cd5488SJamal Hadi Salim 1912717096aSJamal Hadi Salim /* internal flag that only holds state for delayed aevent at the 1922717096aSJamal Hadi Salim * moment 1932717096aSJamal Hadi Salim */ 1942717096aSJamal Hadi Salim u32 xflags; 1952717096aSJamal Hadi Salim 196f8cd5488SJamal Hadi Salim /* Replay detection notification settings */ 197f8cd5488SJamal Hadi Salim u32 replay_maxage; 198f8cd5488SJamal Hadi Salim u32 replay_maxdiff; 199f8cd5488SJamal Hadi Salim 200f8cd5488SJamal Hadi Salim /* Replay detection notification timer */ 201f8cd5488SJamal Hadi Salim struct timer_list rtimer; 202f8cd5488SJamal Hadi Salim 2031da177e4SLinus Torvalds /* Statistics */ 2041da177e4SLinus Torvalds struct xfrm_stats stats; 2051da177e4SLinus Torvalds 2061da177e4SLinus Torvalds struct xfrm_lifetime_cur curlft; 2079e0d57fdSYury Polyanskiy struct tasklet_hrtimer mtimer; 2081da177e4SLinus Torvalds 2099afaca05SMasahide NAKAMURA /* Last used time */ 210d26f3984SHerbert Xu unsigned long lastused; 2119afaca05SMasahide NAKAMURA 2121da177e4SLinus Torvalds /* Reference to data common to all the instances of this 2131da177e4SLinus Torvalds * transformer. */ 214533cb5b0SEric Dumazet const struct xfrm_type *type; 21513996378SHerbert Xu struct xfrm_mode *inner_mode; 216df9dcb45SKazunori MIYAZAWA struct xfrm_mode *inner_mode_iaf; 21713996378SHerbert Xu struct xfrm_mode *outer_mode; 2181da177e4SLinus Torvalds 219df71837dSTrent Jaeger /* Security context */ 220df71837dSTrent Jaeger struct xfrm_sec_ctx *security; 221df71837dSTrent Jaeger 2221da177e4SLinus Torvalds /* Private data of this transformer, format is opaque, 2231da177e4SLinus Torvalds * interpreted by xfrm_type methods. */ 2241da177e4SLinus Torvalds void *data; 2251da177e4SLinus Torvalds }; 2261da177e4SLinus Torvalds 227673c09beSAlexey Dobriyan static inline struct net *xs_net(struct xfrm_state *x) 228673c09beSAlexey Dobriyan { 229673c09beSAlexey Dobriyan return read_pnet(&x->xs_net); 230673c09beSAlexey Dobriyan } 231673c09beSAlexey Dobriyan 2322717096aSJamal Hadi Salim /* xflags - make enum if more show up */ 2332717096aSJamal Hadi Salim #define XFRM_TIME_DEFER 1 2342717096aSJamal Hadi Salim 2351da177e4SLinus Torvalds enum { 2361da177e4SLinus Torvalds XFRM_STATE_VOID, 2371da177e4SLinus Torvalds XFRM_STATE_ACQ, 2381da177e4SLinus Torvalds XFRM_STATE_VALID, 2391da177e4SLinus Torvalds XFRM_STATE_ERROR, 2401da177e4SLinus Torvalds XFRM_STATE_EXPIRED, 2411da177e4SLinus Torvalds XFRM_STATE_DEAD 2421da177e4SLinus Torvalds }; 2431da177e4SLinus Torvalds 24426b15dadSJamal Hadi Salim /* callback structure passed from either netlink or pfkey */ 245fd2c3ef7SEric Dumazet struct km_event { 246bf08867fSHerbert Xu union { 247bf08867fSHerbert Xu u32 hard; 248bf08867fSHerbert Xu u32 proto; 249bf08867fSHerbert Xu u32 byid; 250f8cd5488SJamal Hadi Salim u32 aevent; 251f7b6983fSMasahide NAKAMURA u32 type; 252bf08867fSHerbert Xu } data; 253bf08867fSHerbert Xu 25426b15dadSJamal Hadi Salim u32 seq; 25526b15dadSJamal Hadi Salim u32 pid; 25626b15dadSJamal Hadi Salim u32 event; 2577067802eSAlexey Dobriyan struct net *net; 25826b15dadSJamal Hadi Salim }; 25926b15dadSJamal Hadi Salim 26025ee3286SHerbert Xu struct net_device; 2611da177e4SLinus Torvalds struct xfrm_type; 2621da177e4SLinus Torvalds struct xfrm_dst; 2631da177e4SLinus Torvalds struct xfrm_policy_afinfo { 2641da177e4SLinus Torvalds unsigned short family; 2651da177e4SLinus Torvalds struct dst_ops *dst_ops; 266ddcfd796SAlexey Dobriyan void (*garbage_collect)(struct net *net); 267c5b3cf46SAlexey Dobriyan struct dst_entry *(*dst_lookup)(struct net *net, int tos, 268c5b3cf46SAlexey Dobriyan xfrm_address_t *saddr, 26966cdb3caSHerbert Xu xfrm_address_t *daddr); 270fbda33b2SAlexey Dobriyan int (*get_saddr)(struct net *net, xfrm_address_t *saddr, xfrm_address_t *daddr); 2711da177e4SLinus Torvalds void (*decode_session)(struct sk_buff *skb, 272d5422efeSHerbert Xu struct flowi *fl, 273d5422efeSHerbert Xu int reverse); 27425ee3286SHerbert Xu int (*get_tos)(struct flowi *fl); 275a1b05140SMasahide NAKAMURA int (*init_path)(struct xfrm_dst *path, 276a1b05140SMasahide NAKAMURA struct dst_entry *dst, 277a1b05140SMasahide NAKAMURA int nfheader_len); 27825ee3286SHerbert Xu int (*fill_dst)(struct xfrm_dst *xdst, 27987c1e12bSHerbert Xu struct net_device *dev, 28087c1e12bSHerbert Xu struct flowi *fl); 2811da177e4SLinus Torvalds }; 2821da177e4SLinus Torvalds 2831da177e4SLinus Torvalds extern int xfrm_policy_register_afinfo(struct xfrm_policy_afinfo *afinfo); 2841da177e4SLinus Torvalds extern int xfrm_policy_unregister_afinfo(struct xfrm_policy_afinfo *afinfo); 28526b15dadSJamal Hadi Salim extern void km_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c); 28626b15dadSJamal Hadi Salim extern void km_state_notify(struct xfrm_state *x, struct km_event *c); 2871da177e4SLinus Torvalds 2881da177e4SLinus Torvalds struct xfrm_tmpl; 289980ebd25SJamal Hadi Salim extern int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol); 29053bc6b4dSJamal Hadi Salim extern void km_state_expired(struct xfrm_state *x, int hard, u32 pid); 29153bc6b4dSJamal Hadi Salim extern int __xfrm_state_delete(struct xfrm_state *x); 29253bc6b4dSJamal Hadi Salim 2931da177e4SLinus Torvalds struct xfrm_state_afinfo { 29417c2a42aSHerbert Xu unsigned int family; 29536cf9acfSHerbert Xu unsigned int proto; 2968e3d716cSAl Viro __be16 eth_proto; 29717c2a42aSHerbert Xu struct module *owner; 298533cb5b0SEric Dumazet const struct xfrm_type *type_map[IPPROTO_MAX]; 299aa5d62ccSHerbert Xu struct xfrm_mode *mode_map[XFRM_MODE_MAX]; 300d094cd83SHerbert Xu int (*init_flags)(struct xfrm_state *x); 3018444cf71SThomas Egerer void (*init_tempsel)(struct xfrm_selector *sel, struct flowi *fl); 3028444cf71SThomas Egerer void (*init_temprop)(struct xfrm_state *x, struct xfrm_tmpl *tmpl, 3031da177e4SLinus Torvalds xfrm_address_t *daddr, xfrm_address_t *saddr); 30441a49cc3SMasahide NAKAMURA int (*tmpl_sort)(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n); 30541a49cc3SMasahide NAKAMURA int (*state_sort)(struct xfrm_state **dst, struct xfrm_state **src, int n); 306cdca7265SMiika Komu int (*output)(struct sk_buff *skb); 307227620e2SHerbert Xu int (*extract_input)(struct xfrm_state *x, 308227620e2SHerbert Xu struct sk_buff *skb); 30936cf9acfSHerbert Xu int (*extract_output)(struct xfrm_state *x, 31036cf9acfSHerbert Xu struct sk_buff *skb); 311716062fdSHerbert Xu int (*transport_finish)(struct sk_buff *skb, 312716062fdSHerbert Xu int async); 3131da177e4SLinus Torvalds }; 3141da177e4SLinus Torvalds 3151da177e4SLinus Torvalds extern int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo); 3161da177e4SLinus Torvalds extern int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo); 3171da177e4SLinus Torvalds 3181da177e4SLinus Torvalds extern void xfrm_state_delete_tunnel(struct xfrm_state *x); 3191da177e4SLinus Torvalds 320fd2c3ef7SEric Dumazet struct xfrm_type { 3211da177e4SLinus Torvalds char *description; 3221da177e4SLinus Torvalds struct module *owner; 323a6337463Sjamal u8 proto; 324a6337463Sjamal u8 flags; 3251b5c2299SMasahide NAKAMURA #define XFRM_TYPE_NON_FRAGMENT 1 326436a0a40SHerbert Xu #define XFRM_TYPE_REPLAY_PROT 2 327f04e7e8dSHerbert Xu #define XFRM_TYPE_LOCAL_COADDR 4 328f04e7e8dSHerbert Xu #define XFRM_TYPE_REMOTE_COADDR 8 3291da177e4SLinus Torvalds 33072cb6962SHerbert Xu int (*init_state)(struct xfrm_state *x); 3311da177e4SLinus Torvalds void (*destructor)(struct xfrm_state *); 332e695633eSHerbert Xu int (*input)(struct xfrm_state *, struct sk_buff *skb); 3331da177e4SLinus Torvalds int (*output)(struct xfrm_state *, struct sk_buff *pskb); 334df0ba92aSMasahide NAKAMURA int (*reject)(struct xfrm_state *, struct sk_buff *, struct flowi *); 335aee5adb4SMasahide NAKAMURA int (*hdr_offset)(struct xfrm_state *, struct sk_buff *, u8 **); 3361da177e4SLinus Torvalds /* Estimate maximal size of result of transformation of a dgram */ 337c5c25238SPatrick McHardy u32 (*get_mtu)(struct xfrm_state *, int size); 3381da177e4SLinus Torvalds }; 3391da177e4SLinus Torvalds 340533cb5b0SEric Dumazet extern int xfrm_register_type(const struct xfrm_type *type, unsigned short family); 341533cb5b0SEric Dumazet extern int xfrm_unregister_type(const struct xfrm_type *type, unsigned short family); 3421da177e4SLinus Torvalds 343b59f45d0SHerbert Xu struct xfrm_mode { 344227620e2SHerbert Xu /* 345227620e2SHerbert Xu * Remove encapsulation header. 346227620e2SHerbert Xu * 347227620e2SHerbert Xu * The IP header will be moved over the top of the encapsulation 348227620e2SHerbert Xu * header. 349227620e2SHerbert Xu * 350227620e2SHerbert Xu * On entry, the transport header shall point to where the IP header 351227620e2SHerbert Xu * should be and the network header shall be set to where the IP 352227620e2SHerbert Xu * header currently is. skb->data shall point to the start of the 353227620e2SHerbert Xu * payload. 354227620e2SHerbert Xu */ 355227620e2SHerbert Xu int (*input2)(struct xfrm_state *x, struct sk_buff *skb); 356227620e2SHerbert Xu 357227620e2SHerbert Xu /* 358227620e2SHerbert Xu * This is the actual input entry point. 359227620e2SHerbert Xu * 360227620e2SHerbert Xu * For transport mode and equivalent this would be identical to 361227620e2SHerbert Xu * input2 (which does not need to be set). While tunnel mode 362227620e2SHerbert Xu * and equivalent would set this to the tunnel encapsulation function 363227620e2SHerbert Xu * xfrm4_prepare_input that would in turn call input2. 364227620e2SHerbert Xu */ 365b59f45d0SHerbert Xu int (*input)(struct xfrm_state *x, struct sk_buff *skb); 36637fedd3aSHerbert Xu 36737fedd3aSHerbert Xu /* 36837fedd3aSHerbert Xu * Add encapsulation header. 36937fedd3aSHerbert Xu * 37037fedd3aSHerbert Xu * On exit, the transport header will be set to the start of the 37137fedd3aSHerbert Xu * encapsulation header to be filled in by x->type->output and 37237fedd3aSHerbert Xu * the mac header will be set to the nextheader (protocol for 37337fedd3aSHerbert Xu * IPv4) field of the extension header directly preceding the 37437fedd3aSHerbert Xu * encapsulation header, or in its absence, that of the top IP 37537fedd3aSHerbert Xu * header. The value of the network header will always point 37637fedd3aSHerbert Xu * to the top IP header while skb->data will point to the payload. 37737fedd3aSHerbert Xu */ 37836cf9acfSHerbert Xu int (*output2)(struct xfrm_state *x,struct sk_buff *skb); 37936cf9acfSHerbert Xu 38036cf9acfSHerbert Xu /* 38136cf9acfSHerbert Xu * This is the actual output entry point. 38236cf9acfSHerbert Xu * 38336cf9acfSHerbert Xu * For transport mode and equivalent this would be identical to 38436cf9acfSHerbert Xu * output2 (which does not need to be set). While tunnel mode 38536cf9acfSHerbert Xu * and equivalent would set this to a tunnel encapsulation function 38636cf9acfSHerbert Xu * (xfrm4_prepare_output or xfrm6_prepare_output) that would in turn 38736cf9acfSHerbert Xu * call output2. 38836cf9acfSHerbert Xu */ 389eb878e84SJamal Hadi Salim int (*output)(struct xfrm_state *x, struct sk_buff *skb); 390b59f45d0SHerbert Xu 39117c2a42aSHerbert Xu struct xfrm_state_afinfo *afinfo; 392b59f45d0SHerbert Xu struct module *owner; 393b59f45d0SHerbert Xu unsigned int encap; 3941bfcb10fSHerbert Xu int flags; 3951bfcb10fSHerbert Xu }; 3961bfcb10fSHerbert Xu 3971bfcb10fSHerbert Xu /* Flags for xfrm_mode. */ 3981bfcb10fSHerbert Xu enum { 3991bfcb10fSHerbert Xu XFRM_MODE_FLAG_TUNNEL = 1, 400b59f45d0SHerbert Xu }; 401b59f45d0SHerbert Xu 402b59f45d0SHerbert Xu extern int xfrm_register_mode(struct xfrm_mode *mode, int family); 403b59f45d0SHerbert Xu extern int xfrm_unregister_mode(struct xfrm_mode *mode, int family); 404b59f45d0SHerbert Xu 405df9dcb45SKazunori MIYAZAWA static inline int xfrm_af2proto(unsigned int family) 406df9dcb45SKazunori MIYAZAWA { 407df9dcb45SKazunori MIYAZAWA switch(family) { 408df9dcb45SKazunori MIYAZAWA case AF_INET: 409df9dcb45SKazunori MIYAZAWA return IPPROTO_IPIP; 410df9dcb45SKazunori MIYAZAWA case AF_INET6: 411df9dcb45SKazunori MIYAZAWA return IPPROTO_IPV6; 412df9dcb45SKazunori MIYAZAWA default: 413df9dcb45SKazunori MIYAZAWA return 0; 414df9dcb45SKazunori MIYAZAWA } 415df9dcb45SKazunori MIYAZAWA } 416df9dcb45SKazunori MIYAZAWA 417df9dcb45SKazunori MIYAZAWA static inline struct xfrm_mode *xfrm_ip2inner_mode(struct xfrm_state *x, int ipproto) 418df9dcb45SKazunori MIYAZAWA { 419df9dcb45SKazunori MIYAZAWA if ((ipproto == IPPROTO_IPIP && x->props.family == AF_INET) || 420df9dcb45SKazunori MIYAZAWA (ipproto == IPPROTO_IPV6 && x->props.family == AF_INET6)) 421df9dcb45SKazunori MIYAZAWA return x->inner_mode; 422df9dcb45SKazunori MIYAZAWA else 423df9dcb45SKazunori MIYAZAWA return x->inner_mode_iaf; 424df9dcb45SKazunori MIYAZAWA } 425df9dcb45SKazunori MIYAZAWA 426fd2c3ef7SEric Dumazet struct xfrm_tmpl { 4271da177e4SLinus Torvalds /* id in template is interpreted as: 4281da177e4SLinus Torvalds * daddr - destination of tunnel, may be zero for transport mode. 4291da177e4SLinus Torvalds * spi - zero to acquire spi. Not zero if spi is static, then 4301da177e4SLinus Torvalds * daddr must be fixed too. 4311da177e4SLinus Torvalds * proto - AH/ESP/IPCOMP 4321da177e4SLinus Torvalds */ 4331da177e4SLinus Torvalds struct xfrm_id id; 4341da177e4SLinus Torvalds 4351da177e4SLinus Torvalds /* Source address of tunnel. Ignored, if it is not a tunnel. */ 4361da177e4SLinus Torvalds xfrm_address_t saddr; 4371da177e4SLinus Torvalds 43876b3f055SMiika Komu unsigned short encap_family; 43976b3f055SMiika Komu 440a6337463Sjamal u32 reqid; 4411da177e4SLinus Torvalds 4427e49e6deSMasahide NAKAMURA /* Mode: transport, tunnel etc. */ 443a6337463Sjamal u8 mode; 4441da177e4SLinus Torvalds 4451da177e4SLinus Torvalds /* Sharing mode: unique, this session only, this user only etc. */ 446a6337463Sjamal u8 share; 4471da177e4SLinus Torvalds 4481da177e4SLinus Torvalds /* May skip this transfomration if no SA is found */ 449a6337463Sjamal u8 optional; 4501da177e4SLinus Torvalds 451c5d18e98SHerbert Xu /* Skip aalgos/ealgos/calgos checks. */ 452a6337463Sjamal u8 allalgs; 453c5d18e98SHerbert Xu 4541da177e4SLinus Torvalds /* Bit mask of algos allowed for acquisition */ 455a6337463Sjamal u32 aalgos; 456a6337463Sjamal u32 ealgos; 457a6337463Sjamal u32 calgos; 4581da177e4SLinus Torvalds }; 4591da177e4SLinus Torvalds 460622dc828SMasahide NAKAMURA #define XFRM_MAX_DEPTH 6 4611da177e4SLinus Torvalds 46212a169e7SHerbert Xu struct xfrm_policy_walk_entry { 46312a169e7SHerbert Xu struct list_head all; 46412a169e7SHerbert Xu u8 dead; 46512a169e7SHerbert Xu }; 46612a169e7SHerbert Xu 46712a169e7SHerbert Xu struct xfrm_policy_walk { 46812a169e7SHerbert Xu struct xfrm_policy_walk_entry walk; 46912a169e7SHerbert Xu u8 type; 47012a169e7SHerbert Xu u32 seq; 47112a169e7SHerbert Xu }; 47212a169e7SHerbert Xu 473fd2c3ef7SEric Dumazet struct xfrm_policy { 4740331b1f3SAlexey Dobriyan #ifdef CONFIG_NET_NS 4750331b1f3SAlexey Dobriyan struct net *xp_net; 4760331b1f3SAlexey Dobriyan #endif 4772518c7c2SDavid S. Miller struct hlist_node bydst; 4782518c7c2SDavid S. Miller struct hlist_node byidx; 4791da177e4SLinus Torvalds 4801da177e4SLinus Torvalds /* This lock only affects elements except for entry. */ 4811da177e4SLinus Torvalds rwlock_t lock; 4821da177e4SLinus Torvalds atomic_t refcnt; 4831da177e4SLinus Torvalds struct timer_list timer; 4841da177e4SLinus Torvalds 485fe1a5f03STimo Teräs struct flow_cache_object flo; 48680c802f3STimo Teräs atomic_t genid; 4871da177e4SLinus Torvalds u32 priority; 4881da177e4SLinus Torvalds u32 index; 489bf825f81SJamal Hadi Salim struct xfrm_mark mark; 4901da177e4SLinus Torvalds struct xfrm_selector selector; 4911da177e4SLinus Torvalds struct xfrm_lifetime_cfg lft; 4921da177e4SLinus Torvalds struct xfrm_lifetime_cur curlft; 49312a169e7SHerbert Xu struct xfrm_policy_walk_entry walk; 49446ca5f5dSArnaldo Carvalho de Melo u8 type; 49546ca5f5dSArnaldo Carvalho de Melo u8 action; 49646ca5f5dSArnaldo Carvalho de Melo u8 flags; 49746ca5f5dSArnaldo Carvalho de Melo u8 xfrm_nr; 49812a169e7SHerbert Xu u16 family; 499df71837dSTrent Jaeger struct xfrm_sec_ctx *security; 5001da177e4SLinus Torvalds struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH]; 5011da177e4SLinus Torvalds }; 5021da177e4SLinus Torvalds 5030331b1f3SAlexey Dobriyan static inline struct net *xp_net(struct xfrm_policy *xp) 5040331b1f3SAlexey Dobriyan { 5050331b1f3SAlexey Dobriyan return read_pnet(&xp->xp_net); 5060331b1f3SAlexey Dobriyan } 5070331b1f3SAlexey Dobriyan 50813c1d189SArnaud Ebalard struct xfrm_kmaddress { 50913c1d189SArnaud Ebalard xfrm_address_t local; 51013c1d189SArnaud Ebalard xfrm_address_t remote; 51113c1d189SArnaud Ebalard u32 reserved; 51213c1d189SArnaud Ebalard u16 family; 51313c1d189SArnaud Ebalard }; 51413c1d189SArnaud Ebalard 51580c9abaaSShinta Sugimoto struct xfrm_migrate { 51680c9abaaSShinta Sugimoto xfrm_address_t old_daddr; 51780c9abaaSShinta Sugimoto xfrm_address_t old_saddr; 51880c9abaaSShinta Sugimoto xfrm_address_t new_daddr; 51980c9abaaSShinta Sugimoto xfrm_address_t new_saddr; 52080c9abaaSShinta Sugimoto u8 proto; 52180c9abaaSShinta Sugimoto u8 mode; 52280c9abaaSShinta Sugimoto u16 reserved; 52380c9abaaSShinta Sugimoto u32 reqid; 52480c9abaaSShinta Sugimoto u16 old_family; 52580c9abaaSShinta Sugimoto u16 new_family; 52680c9abaaSShinta Sugimoto }; 52780c9abaaSShinta Sugimoto 5281da177e4SLinus Torvalds #define XFRM_KM_TIMEOUT 30 529f8cd5488SJamal Hadi Salim /* which seqno */ 530f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_SEQ 1 531f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_OSEQ 2 532f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_SEQ_MASK 3 533f8cd5488SJamal Hadi Salim /* what happened */ 534f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_UPDATE XFRM_AE_CR 535f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_TIMEOUT XFRM_AE_CE 536f8cd5488SJamal Hadi Salim 537f8cd5488SJamal Hadi Salim /* default aevent timeout in units of 100ms */ 538f8cd5488SJamal Hadi Salim #define XFRM_AE_ETIME 10 539f8cd5488SJamal Hadi Salim /* Async Event timer multiplier */ 540f8cd5488SJamal Hadi Salim #define XFRM_AE_ETH_M 10 541f8cd5488SJamal Hadi Salim /* default seq threshold size */ 542f8cd5488SJamal Hadi Salim #define XFRM_AE_SEQT_SIZE 2 5431da177e4SLinus Torvalds 544fd2c3ef7SEric Dumazet struct xfrm_mgr { 5451da177e4SLinus Torvalds struct list_head list; 5461da177e4SLinus Torvalds char *id; 54726b15dadSJamal Hadi Salim int (*notify)(struct xfrm_state *x, struct km_event *c); 5481da177e4SLinus Torvalds int (*acquire)(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *xp, int dir); 549cb969f07SVenkat Yekkirala struct xfrm_policy *(*compile_policy)(struct sock *sk, int opt, u8 *data, int len, int *dir); 5505d36b180SAl Viro int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); 55126b15dadSJamal Hadi Salim int (*notify_policy)(struct xfrm_policy *x, int dir, struct km_event *c); 552db983c11SAlexey Dobriyan int (*report)(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr); 55313c1d189SArnaud Ebalard int (*migrate)(struct xfrm_selector *sel, u8 dir, u8 type, struct xfrm_migrate *m, int num_bundles, struct xfrm_kmaddress *k); 5541da177e4SLinus Torvalds }; 5551da177e4SLinus Torvalds 5561da177e4SLinus Torvalds extern int xfrm_register_km(struct xfrm_mgr *km); 5571da177e4SLinus Torvalds extern int xfrm_unregister_km(struct xfrm_mgr *km); 5581da177e4SLinus Torvalds 559436a0a40SHerbert Xu /* 560436a0a40SHerbert Xu * This structure is used for the duration where packets are being 561436a0a40SHerbert Xu * transformed by IPsec. As soon as the packet leaves IPsec the 562436a0a40SHerbert Xu * area beyond the generic IP part may be overwritten. 563436a0a40SHerbert Xu */ 564436a0a40SHerbert Xu struct xfrm_skb_cb { 565436a0a40SHerbert Xu union { 566436a0a40SHerbert Xu struct inet_skb_parm h4; 567436a0a40SHerbert Xu struct inet6_skb_parm h6; 568436a0a40SHerbert Xu } header; 569436a0a40SHerbert Xu 570436a0a40SHerbert Xu /* Sequence number for replay protection. */ 571b318e0e4SHerbert Xu union { 572b318e0e4SHerbert Xu u64 output; 573b318e0e4SHerbert Xu __be32 input; 574b318e0e4SHerbert Xu } seq; 575436a0a40SHerbert Xu }; 576436a0a40SHerbert Xu 577436a0a40SHerbert Xu #define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0])) 578436a0a40SHerbert Xu 57936cf9acfSHerbert Xu /* 58036cf9acfSHerbert Xu * This structure is used by the afinfo prepare_input/prepare_output functions 58136cf9acfSHerbert Xu * to transmit header information to the mode input/output functions. 58236cf9acfSHerbert Xu */ 58336cf9acfSHerbert Xu struct xfrm_mode_skb_cb { 58436cf9acfSHerbert Xu union { 58536cf9acfSHerbert Xu struct inet_skb_parm h4; 58636cf9acfSHerbert Xu struct inet6_skb_parm h6; 58736cf9acfSHerbert Xu } header; 58836cf9acfSHerbert Xu 58936cf9acfSHerbert Xu /* Copied from header for IPv4, always set to zero and DF for IPv6. */ 59036cf9acfSHerbert Xu __be16 id; 59136cf9acfSHerbert Xu __be16 frag_off; 59236cf9acfSHerbert Xu 593732c8bd5SHerbert Xu /* IP header length (excluding options or extension headers). */ 594732c8bd5SHerbert Xu u8 ihl; 595732c8bd5SHerbert Xu 59636cf9acfSHerbert Xu /* TOS for IPv4, class for IPv6. */ 59736cf9acfSHerbert Xu u8 tos; 59836cf9acfSHerbert Xu 59936cf9acfSHerbert Xu /* TTL for IPv4, hop limitfor IPv6. */ 60036cf9acfSHerbert Xu u8 ttl; 60136cf9acfSHerbert Xu 60236cf9acfSHerbert Xu /* Protocol for IPv4, NH for IPv6. */ 60336cf9acfSHerbert Xu u8 protocol; 60436cf9acfSHerbert Xu 605732c8bd5SHerbert Xu /* Option length for IPv4, zero for IPv6. */ 606732c8bd5SHerbert Xu u8 optlen; 607732c8bd5SHerbert Xu 60836cf9acfSHerbert Xu /* Used by IPv6 only, zero for IPv4. */ 60936cf9acfSHerbert Xu u8 flow_lbl[3]; 61036cf9acfSHerbert Xu }; 61136cf9acfSHerbert Xu 61236cf9acfSHerbert Xu #define XFRM_MODE_SKB_CB(__skb) ((struct xfrm_mode_skb_cb *)&((__skb)->cb[0])) 61336cf9acfSHerbert Xu 614716062fdSHerbert Xu /* 615716062fdSHerbert Xu * This structure is used by the input processing to locate the SPI and 616716062fdSHerbert Xu * related information. 617716062fdSHerbert Xu */ 618716062fdSHerbert Xu struct xfrm_spi_skb_cb { 619716062fdSHerbert Xu union { 620716062fdSHerbert Xu struct inet_skb_parm h4; 621716062fdSHerbert Xu struct inet6_skb_parm h6; 622716062fdSHerbert Xu } header; 623716062fdSHerbert Xu 624716062fdSHerbert Xu unsigned int daddroff; 6252fcb45b6SHerbert Xu unsigned int family; 626716062fdSHerbert Xu }; 627716062fdSHerbert Xu 628716062fdSHerbert Xu #define XFRM_SPI_SKB_CB(__skb) ((struct xfrm_spi_skb_cb *)&((__skb)->cb[0])) 629716062fdSHerbert Xu 630161a09e7SJoy Latten /* Audit Information */ 631fd2c3ef7SEric Dumazet struct xfrm_audit { 632161a09e7SJoy Latten u32 secid; 6332532386fSEric Paris uid_t loginuid; 6342532386fSEric Paris u32 sessionid; 635161a09e7SJoy Latten }; 636c9204d9cSJoy Latten 637c9204d9cSJoy Latten #ifdef CONFIG_AUDITSYSCALL 638afeb14b4SPaul Moore static inline struct audit_buffer *xfrm_audit_start(const char *op) 639ab5f5e8bSJoy Latten { 640ab5f5e8bSJoy Latten struct audit_buffer *audit_buf = NULL; 641ab5f5e8bSJoy Latten 642afeb14b4SPaul Moore if (audit_enabled == 0) 643afeb14b4SPaul Moore return NULL; 644ab5f5e8bSJoy Latten audit_buf = audit_log_start(current->audit_context, GFP_ATOMIC, 645ab5f5e8bSJoy Latten AUDIT_MAC_IPSEC_EVENT); 646ab5f5e8bSJoy Latten if (audit_buf == NULL) 647ab5f5e8bSJoy Latten return NULL; 648afeb14b4SPaul Moore audit_log_format(audit_buf, "op=%s", op); 649afeb14b4SPaul Moore return audit_buf; 650afeb14b4SPaul Moore } 651afeb14b4SPaul Moore 6522532386fSEric Paris static inline void xfrm_audit_helper_usrinfo(uid_t auid, u32 ses, u32 secid, 653afeb14b4SPaul Moore struct audit_buffer *audit_buf) 654afeb14b4SPaul Moore { 655afeb14b4SPaul Moore char *secctx; 656afeb14b4SPaul Moore u32 secctx_len; 657ab5f5e8bSJoy Latten 6582532386fSEric Paris audit_log_format(audit_buf, " auid=%u ses=%u", auid, ses); 65968277accSPaul Moore if (secid != 0 && 66068277accSPaul Moore security_secid_to_secctx(secid, &secctx, &secctx_len) == 0) { 661ab5f5e8bSJoy Latten audit_log_format(audit_buf, " subj=%s", secctx); 662ab5f5e8bSJoy Latten security_release_secctx(secctx, secctx_len); 663ab5f5e8bSJoy Latten } else 664ab5f5e8bSJoy Latten audit_log_task_context(audit_buf); 665ab5f5e8bSJoy Latten } 666ab5f5e8bSJoy Latten 667ab5f5e8bSJoy Latten extern void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, 6682532386fSEric Paris u32 auid, u32 ses, u32 secid); 669ab5f5e8bSJoy Latten extern void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, 6702532386fSEric Paris u32 auid, u32 ses, u32 secid); 671ab5f5e8bSJoy Latten extern void xfrm_audit_state_add(struct xfrm_state *x, int result, 6722532386fSEric Paris u32 auid, u32 ses, u32 secid); 673ab5f5e8bSJoy Latten extern void xfrm_audit_state_delete(struct xfrm_state *x, int result, 6742532386fSEric Paris u32 auid, u32 ses, u32 secid); 675afeb14b4SPaul Moore extern void xfrm_audit_state_replay_overflow(struct xfrm_state *x, 676afeb14b4SPaul Moore struct sk_buff *skb); 677afeb14b4SPaul Moore extern void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family); 678afeb14b4SPaul Moore extern void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, 679afeb14b4SPaul Moore __be32 net_spi, __be32 net_seq); 680afeb14b4SPaul Moore extern void xfrm_audit_state_icvfail(struct xfrm_state *x, 681afeb14b4SPaul Moore struct sk_buff *skb, u8 proto); 682c9204d9cSJoy Latten #else 68341fef0eeSMarcin Slusarz 68441fef0eeSMarcin Slusarz static inline void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, 68541fef0eeSMarcin Slusarz u32 auid, u32 ses, u32 secid) 68641fef0eeSMarcin Slusarz { 68741fef0eeSMarcin Slusarz } 68841fef0eeSMarcin Slusarz 68941fef0eeSMarcin Slusarz static inline void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, 69041fef0eeSMarcin Slusarz u32 auid, u32 ses, u32 secid) 69141fef0eeSMarcin Slusarz { 69241fef0eeSMarcin Slusarz } 69341fef0eeSMarcin Slusarz 69441fef0eeSMarcin Slusarz static inline void xfrm_audit_state_add(struct xfrm_state *x, int result, 69541fef0eeSMarcin Slusarz u32 auid, u32 ses, u32 secid) 69641fef0eeSMarcin Slusarz { 69741fef0eeSMarcin Slusarz } 69841fef0eeSMarcin Slusarz 69941fef0eeSMarcin Slusarz static inline void xfrm_audit_state_delete(struct xfrm_state *x, int result, 70041fef0eeSMarcin Slusarz u32 auid, u32 ses, u32 secid) 70141fef0eeSMarcin Slusarz { 70241fef0eeSMarcin Slusarz } 70341fef0eeSMarcin Slusarz 70441fef0eeSMarcin Slusarz static inline void xfrm_audit_state_replay_overflow(struct xfrm_state *x, 70541fef0eeSMarcin Slusarz struct sk_buff *skb) 70641fef0eeSMarcin Slusarz { 70741fef0eeSMarcin Slusarz } 70841fef0eeSMarcin Slusarz 70941fef0eeSMarcin Slusarz static inline void xfrm_audit_state_notfound_simple(struct sk_buff *skb, 71041fef0eeSMarcin Slusarz u16 family) 71141fef0eeSMarcin Slusarz { 71241fef0eeSMarcin Slusarz } 71341fef0eeSMarcin Slusarz 71441fef0eeSMarcin Slusarz static inline void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, 71541fef0eeSMarcin Slusarz __be32 net_spi, __be32 net_seq) 71641fef0eeSMarcin Slusarz { 71741fef0eeSMarcin Slusarz } 71841fef0eeSMarcin Slusarz 71941fef0eeSMarcin Slusarz static inline void xfrm_audit_state_icvfail(struct xfrm_state *x, 72041fef0eeSMarcin Slusarz struct sk_buff *skb, u8 proto) 72141fef0eeSMarcin Slusarz { 72241fef0eeSMarcin Slusarz } 723c9204d9cSJoy Latten #endif /* CONFIG_AUDITSYSCALL */ 724161a09e7SJoy Latten 7251da177e4SLinus Torvalds static inline void xfrm_pol_hold(struct xfrm_policy *policy) 7261da177e4SLinus Torvalds { 7271da177e4SLinus Torvalds if (likely(policy != NULL)) 7281da177e4SLinus Torvalds atomic_inc(&policy->refcnt); 7291da177e4SLinus Torvalds } 7301da177e4SLinus Torvalds 73164c31b3fSWANG Cong extern void xfrm_policy_destroy(struct xfrm_policy *policy); 7321da177e4SLinus Torvalds 7331da177e4SLinus Torvalds static inline void xfrm_pol_put(struct xfrm_policy *policy) 7341da177e4SLinus Torvalds { 7351da177e4SLinus Torvalds if (atomic_dec_and_test(&policy->refcnt)) 73664c31b3fSWANG Cong xfrm_policy_destroy(policy); 7371da177e4SLinus Torvalds } 7381da177e4SLinus Torvalds 7394e81bb83SMasahide NAKAMURA static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols) 7404e81bb83SMasahide NAKAMURA { 7414e81bb83SMasahide NAKAMURA int i; 7424e81bb83SMasahide NAKAMURA for (i = npols - 1; i >= 0; --i) 7434e81bb83SMasahide NAKAMURA xfrm_pol_put(pols[i]); 7444e81bb83SMasahide NAKAMURA } 7454e81bb83SMasahide NAKAMURA 7461da177e4SLinus Torvalds extern void __xfrm_state_destroy(struct xfrm_state *); 7471da177e4SLinus Torvalds 74821380b81SHerbert Xu static inline void __xfrm_state_put(struct xfrm_state *x) 74921380b81SHerbert Xu { 75021380b81SHerbert Xu atomic_dec(&x->refcnt); 75121380b81SHerbert Xu } 75221380b81SHerbert Xu 7531da177e4SLinus Torvalds static inline void xfrm_state_put(struct xfrm_state *x) 7541da177e4SLinus Torvalds { 7551da177e4SLinus Torvalds if (atomic_dec_and_test(&x->refcnt)) 7561da177e4SLinus Torvalds __xfrm_state_destroy(x); 7571da177e4SLinus Torvalds } 7581da177e4SLinus Torvalds 7591da177e4SLinus Torvalds static inline void xfrm_state_hold(struct xfrm_state *x) 7601da177e4SLinus Torvalds { 7611da177e4SLinus Torvalds atomic_inc(&x->refcnt); 7621da177e4SLinus Torvalds } 7631da177e4SLinus Torvalds 7641da177e4SLinus Torvalds static __inline__ int addr_match(void *token1, void *token2, int prefixlen) 7651da177e4SLinus Torvalds { 7665f19343fSAl Viro __be32 *a1 = token1; 7675f19343fSAl Viro __be32 *a2 = token2; 7681da177e4SLinus Torvalds int pdw; 7691da177e4SLinus Torvalds int pbi; 7701da177e4SLinus Torvalds 771a6337463Sjamal pdw = prefixlen >> 5; /* num of whole u32 in prefix */ 7721da177e4SLinus Torvalds pbi = prefixlen & 0x1f; /* num of bits in incomplete u32 in prefix */ 7731da177e4SLinus Torvalds 7741da177e4SLinus Torvalds if (pdw) 7751da177e4SLinus Torvalds if (memcmp(a1, a2, pdw << 2)) 7761da177e4SLinus Torvalds return 0; 7771da177e4SLinus Torvalds 7781da177e4SLinus Torvalds if (pbi) { 7795f19343fSAl Viro __be32 mask; 7801da177e4SLinus Torvalds 7811da177e4SLinus Torvalds mask = htonl((0xffffffff) << (32 - pbi)); 7821da177e4SLinus Torvalds 7831da177e4SLinus Torvalds if ((a1[pdw] ^ a2[pdw]) & mask) 7841da177e4SLinus Torvalds return 0; 7851da177e4SLinus Torvalds } 7861da177e4SLinus Torvalds 7871da177e4SLinus Torvalds return 1; 7881da177e4SLinus Torvalds } 7891da177e4SLinus Torvalds 7901da177e4SLinus Torvalds static __inline__ 791f9d07e41SAl Viro __be16 xfrm_flowi_sport(struct flowi *fl) 7921da177e4SLinus Torvalds { 793f9d07e41SAl Viro __be16 port; 7941da177e4SLinus Torvalds switch(fl->proto) { 7951da177e4SLinus Torvalds case IPPROTO_TCP: 7961da177e4SLinus Torvalds case IPPROTO_UDP: 797ba4e58ecSGerrit Renker case IPPROTO_UDPLITE: 7981da177e4SLinus Torvalds case IPPROTO_SCTP: 7991da177e4SLinus Torvalds port = fl->fl_ip_sport; 8001da177e4SLinus Torvalds break; 8011da177e4SLinus Torvalds case IPPROTO_ICMP: 8021da177e4SLinus Torvalds case IPPROTO_ICMPV6: 8031da177e4SLinus Torvalds port = htons(fl->fl_icmp_type); 8041da177e4SLinus Torvalds break; 8052ce4272aSMasahide NAKAMURA case IPPROTO_MH: 8062ce4272aSMasahide NAKAMURA port = htons(fl->fl_mh_type); 8072ce4272aSMasahide NAKAMURA break; 8081da177e4SLinus Torvalds default: 8091da177e4SLinus Torvalds port = 0; /*XXX*/ 8101da177e4SLinus Torvalds } 8111da177e4SLinus Torvalds return port; 8121da177e4SLinus Torvalds } 8131da177e4SLinus Torvalds 8141da177e4SLinus Torvalds static __inline__ 815f9d07e41SAl Viro __be16 xfrm_flowi_dport(struct flowi *fl) 8161da177e4SLinus Torvalds { 817f9d07e41SAl Viro __be16 port; 8181da177e4SLinus Torvalds switch(fl->proto) { 8191da177e4SLinus Torvalds case IPPROTO_TCP: 8201da177e4SLinus Torvalds case IPPROTO_UDP: 821ba4e58ecSGerrit Renker case IPPROTO_UDPLITE: 8221da177e4SLinus Torvalds case IPPROTO_SCTP: 8231da177e4SLinus Torvalds port = fl->fl_ip_dport; 8241da177e4SLinus Torvalds break; 8251da177e4SLinus Torvalds case IPPROTO_ICMP: 8261da177e4SLinus Torvalds case IPPROTO_ICMPV6: 8271da177e4SLinus Torvalds port = htons(fl->fl_icmp_code); 8281da177e4SLinus Torvalds break; 8291da177e4SLinus Torvalds default: 8301da177e4SLinus Torvalds port = 0; /*XXX*/ 8311da177e4SLinus Torvalds } 8321da177e4SLinus Torvalds return port; 8331da177e4SLinus Torvalds } 8341da177e4SLinus Torvalds 83577681021SAndrew Morton extern int xfrm_selector_match(struct xfrm_selector *sel, struct flowi *fl, 83677681021SAndrew Morton unsigned short family); 8371da177e4SLinus Torvalds 838df71837dSTrent Jaeger #ifdef CONFIG_SECURITY_NETWORK_XFRM 839df71837dSTrent Jaeger /* If neither has a context --> match 840df71837dSTrent Jaeger * Otherwise, both must have a context and the sids, doi, alg must match 841df71837dSTrent Jaeger */ 842df71837dSTrent Jaeger static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) 843df71837dSTrent Jaeger { 844df71837dSTrent Jaeger return ((!s1 && !s2) || 845df71837dSTrent Jaeger (s1 && s2 && 846df71837dSTrent Jaeger (s1->ctx_sid == s2->ctx_sid) && 847df71837dSTrent Jaeger (s1->ctx_doi == s2->ctx_doi) && 848df71837dSTrent Jaeger (s1->ctx_alg == s2->ctx_alg))); 849df71837dSTrent Jaeger } 850df71837dSTrent Jaeger #else 851df71837dSTrent Jaeger static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) 852df71837dSTrent Jaeger { 853df71837dSTrent Jaeger return 1; 854df71837dSTrent Jaeger } 855df71837dSTrent Jaeger #endif 856df71837dSTrent Jaeger 8571da177e4SLinus Torvalds /* A struct encoding bundle of transformations to apply to some set of flow. 8581da177e4SLinus Torvalds * 8591da177e4SLinus Torvalds * dst->child points to the next element of bundle. 8601da177e4SLinus Torvalds * dst->xfrm points to an instanse of transformer. 8611da177e4SLinus Torvalds * 8621da177e4SLinus Torvalds * Due to unfortunate limitations of current routing cache, which we 8631da177e4SLinus Torvalds * have no time to fix, it mirrors struct rtable and bound to the same 8641da177e4SLinus Torvalds * routing key, including saddr,daddr. However, we can have many of 8651da177e4SLinus Torvalds * bundles differing by session id. All the bundles grow from a parent 8661da177e4SLinus Torvalds * policy rule. 8671da177e4SLinus Torvalds */ 868fd2c3ef7SEric Dumazet struct xfrm_dst { 8691da177e4SLinus Torvalds union { 8701da177e4SLinus Torvalds struct dst_entry dst; 8711da177e4SLinus Torvalds struct rtable rt; 8721da177e4SLinus Torvalds struct rt6_info rt6; 8731da177e4SLinus Torvalds } u; 8741da177e4SLinus Torvalds struct dst_entry *route; 87580c802f3STimo Teräs struct flow_cache_object flo; 87680c802f3STimo Teräs struct xfrm_policy *pols[XFRM_POLICY_TYPE_MAX]; 87780c802f3STimo Teräs int num_pols, num_xfrms; 878157bfc25SMasahide NAKAMURA #ifdef CONFIG_XFRM_SUB_POLICY 879157bfc25SMasahide NAKAMURA struct flowi *origin; 880157bfc25SMasahide NAKAMURA struct xfrm_selector *partner; 881157bfc25SMasahide NAKAMURA #endif 88280c802f3STimo Teräs u32 xfrm_genid; 88380c802f3STimo Teräs u32 policy_genid; 8841da177e4SLinus Torvalds u32 route_mtu_cached; 8851da177e4SLinus Torvalds u32 child_mtu_cached; 88692d63decSHideaki YOSHIFUJI u32 route_cookie; 88792d63decSHideaki YOSHIFUJI u32 path_cookie; 8881da177e4SLinus Torvalds }; 8891da177e4SLinus Torvalds 890def8b4faSAlexey Dobriyan #ifdef CONFIG_XFRM 891aabc9761SHerbert Xu static inline void xfrm_dst_destroy(struct xfrm_dst *xdst) 892aabc9761SHerbert Xu { 89380c802f3STimo Teräs xfrm_pols_put(xdst->pols, xdst->num_pols); 894aabc9761SHerbert Xu dst_release(xdst->route); 895aabc9761SHerbert Xu if (likely(xdst->u.dst.xfrm)) 896aabc9761SHerbert Xu xfrm_state_put(xdst->u.dst.xfrm); 897157bfc25SMasahide NAKAMURA #ifdef CONFIG_XFRM_SUB_POLICY 898157bfc25SMasahide NAKAMURA kfree(xdst->origin); 899157bfc25SMasahide NAKAMURA xdst->origin = NULL; 900157bfc25SMasahide NAKAMURA kfree(xdst->partner); 901157bfc25SMasahide NAKAMURA xdst->partner = NULL; 902157bfc25SMasahide NAKAMURA #endif 903aabc9761SHerbert Xu } 904def8b4faSAlexey Dobriyan #endif 905aabc9761SHerbert Xu 906aabc9761SHerbert Xu extern void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev); 907aabc9761SHerbert Xu 908fd2c3ef7SEric Dumazet struct sec_path { 9091da177e4SLinus Torvalds atomic_t refcnt; 9101da177e4SLinus Torvalds int len; 911dbe5b4aaSHerbert Xu struct xfrm_state *xvec[XFRM_MAX_DEPTH]; 9121da177e4SLinus Torvalds }; 9131da177e4SLinus Torvalds 9141da177e4SLinus Torvalds static inline struct sec_path * 9151da177e4SLinus Torvalds secpath_get(struct sec_path *sp) 9161da177e4SLinus Torvalds { 9171da177e4SLinus Torvalds if (sp) 9181da177e4SLinus Torvalds atomic_inc(&sp->refcnt); 9191da177e4SLinus Torvalds return sp; 9201da177e4SLinus Torvalds } 9211da177e4SLinus Torvalds 9221da177e4SLinus Torvalds extern void __secpath_destroy(struct sec_path *sp); 9231da177e4SLinus Torvalds 9241da177e4SLinus Torvalds static inline void 9251da177e4SLinus Torvalds secpath_put(struct sec_path *sp) 9261da177e4SLinus Torvalds { 9271da177e4SLinus Torvalds if (sp && atomic_dec_and_test(&sp->refcnt)) 9281da177e4SLinus Torvalds __secpath_destroy(sp); 9291da177e4SLinus Torvalds } 9301da177e4SLinus Torvalds 9311da177e4SLinus Torvalds extern struct sec_path *secpath_dup(struct sec_path *src); 9321da177e4SLinus Torvalds 9331da177e4SLinus Torvalds static inline void 9341da177e4SLinus Torvalds secpath_reset(struct sk_buff *skb) 9351da177e4SLinus Torvalds { 9361da177e4SLinus Torvalds #ifdef CONFIG_XFRM 9371da177e4SLinus Torvalds secpath_put(skb->sp); 9381da177e4SLinus Torvalds skb->sp = NULL; 9391da177e4SLinus Torvalds #endif 9401da177e4SLinus Torvalds } 9411da177e4SLinus Torvalds 9421da177e4SLinus Torvalds static inline int 943a1e59abfSPatrick McHardy xfrm_addr_any(xfrm_address_t *addr, unsigned short family) 944a1e59abfSPatrick McHardy { 945a1e59abfSPatrick McHardy switch (family) { 946a1e59abfSPatrick McHardy case AF_INET: 947a1e59abfSPatrick McHardy return addr->a4 == 0; 948a1e59abfSPatrick McHardy case AF_INET6: 949a1e59abfSPatrick McHardy return ipv6_addr_any((struct in6_addr *)&addr->a6); 950a1e59abfSPatrick McHardy } 951a1e59abfSPatrick McHardy return 0; 952a1e59abfSPatrick McHardy } 953a1e59abfSPatrick McHardy 954a1e59abfSPatrick McHardy static inline int 9551da177e4SLinus Torvalds __xfrm4_state_addr_cmp(struct xfrm_tmpl *tmpl, struct xfrm_state *x) 9561da177e4SLinus Torvalds { 9571da177e4SLinus Torvalds return (tmpl->saddr.a4 && 9581da177e4SLinus Torvalds tmpl->saddr.a4 != x->props.saddr.a4); 9591da177e4SLinus Torvalds } 9601da177e4SLinus Torvalds 9611da177e4SLinus Torvalds static inline int 9621da177e4SLinus Torvalds __xfrm6_state_addr_cmp(struct xfrm_tmpl *tmpl, struct xfrm_state *x) 9631da177e4SLinus Torvalds { 9641da177e4SLinus Torvalds return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) && 9651da177e4SLinus Torvalds ipv6_addr_cmp((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr)); 9661da177e4SLinus Torvalds } 9671da177e4SLinus Torvalds 9681da177e4SLinus Torvalds static inline int 9691da177e4SLinus Torvalds xfrm_state_addr_cmp(struct xfrm_tmpl *tmpl, struct xfrm_state *x, unsigned short family) 9701da177e4SLinus Torvalds { 9711da177e4SLinus Torvalds switch (family) { 9721da177e4SLinus Torvalds case AF_INET: 9731da177e4SLinus Torvalds return __xfrm4_state_addr_cmp(tmpl, x); 9741da177e4SLinus Torvalds case AF_INET6: 9751da177e4SLinus Torvalds return __xfrm6_state_addr_cmp(tmpl, x); 9761da177e4SLinus Torvalds } 9771da177e4SLinus Torvalds return !0; 9781da177e4SLinus Torvalds } 9791da177e4SLinus Torvalds 9801da177e4SLinus Torvalds #ifdef CONFIG_XFRM 9811da177e4SLinus Torvalds extern int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb, unsigned short family); 9821da177e4SLinus Torvalds 983d5422efeSHerbert Xu static inline int __xfrm_policy_check2(struct sock *sk, int dir, 984d5422efeSHerbert Xu struct sk_buff *skb, 985d5422efeSHerbert Xu unsigned int family, int reverse) 9861da177e4SLinus Torvalds { 987f6e1e25dSAlexey Dobriyan struct net *net = dev_net(skb->dev); 988d5422efeSHerbert Xu int ndir = dir | (reverse ? XFRM_POLICY_MASK + 1 : 0); 989d5422efeSHerbert Xu 9901da177e4SLinus Torvalds if (sk && sk->sk_policy[XFRM_POLICY_IN]) 991d5422efeSHerbert Xu return __xfrm_policy_check(sk, ndir, skb, family); 9921da177e4SLinus Torvalds 993f6e1e25dSAlexey Dobriyan return (!net->xfrm.policy_count[dir] && !skb->sp) || 994adf30907SEric Dumazet (skb_dst(skb)->flags & DST_NOPOLICY) || 995d5422efeSHerbert Xu __xfrm_policy_check(sk, ndir, skb, family); 996d5422efeSHerbert Xu } 997d5422efeSHerbert Xu 998d5422efeSHerbert Xu static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) 999d5422efeSHerbert Xu { 1000d5422efeSHerbert Xu return __xfrm_policy_check2(sk, dir, skb, family, 0); 10011da177e4SLinus Torvalds } 10021da177e4SLinus Torvalds 10031da177e4SLinus Torvalds static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 10041da177e4SLinus Torvalds { 10051da177e4SLinus Torvalds return xfrm_policy_check(sk, dir, skb, AF_INET); 10061da177e4SLinus Torvalds } 10071da177e4SLinus Torvalds 10081da177e4SLinus Torvalds static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 10091da177e4SLinus Torvalds { 10101da177e4SLinus Torvalds return xfrm_policy_check(sk, dir, skb, AF_INET6); 10111da177e4SLinus Torvalds } 10121da177e4SLinus Torvalds 1013d5422efeSHerbert Xu static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir, 1014d5422efeSHerbert Xu struct sk_buff *skb) 1015d5422efeSHerbert Xu { 1016d5422efeSHerbert Xu return __xfrm_policy_check2(sk, dir, skb, AF_INET, 1); 1017d5422efeSHerbert Xu } 1018d5422efeSHerbert Xu 1019d5422efeSHerbert Xu static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir, 1020d5422efeSHerbert Xu struct sk_buff *skb) 1021d5422efeSHerbert Xu { 1022d5422efeSHerbert Xu return __xfrm_policy_check2(sk, dir, skb, AF_INET6, 1); 1023d5422efeSHerbert Xu } 1024d5422efeSHerbert Xu 1025d5422efeSHerbert Xu extern int __xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, 1026d5422efeSHerbert Xu unsigned int family, int reverse); 1027d5422efeSHerbert Xu 1028d5422efeSHerbert Xu static inline int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, 1029d5422efeSHerbert Xu unsigned int family) 1030d5422efeSHerbert Xu { 1031d5422efeSHerbert Xu return __xfrm_decode_session(skb, fl, family, 0); 1032d5422efeSHerbert Xu } 1033d5422efeSHerbert Xu 1034d5422efeSHerbert Xu static inline int xfrm_decode_session_reverse(struct sk_buff *skb, 1035d5422efeSHerbert Xu struct flowi *fl, 1036d5422efeSHerbert Xu unsigned int family) 1037d5422efeSHerbert Xu { 1038d5422efeSHerbert Xu return __xfrm_decode_session(skb, fl, family, 1); 1039d5422efeSHerbert Xu } 1040d5422efeSHerbert Xu 10411da177e4SLinus Torvalds extern int __xfrm_route_forward(struct sk_buff *skb, unsigned short family); 10421da177e4SLinus Torvalds 10431da177e4SLinus Torvalds static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family) 10441da177e4SLinus Torvalds { 104599a66657SAlexey Dobriyan struct net *net = dev_net(skb->dev); 104699a66657SAlexey Dobriyan 104799a66657SAlexey Dobriyan return !net->xfrm.policy_count[XFRM_POLICY_OUT] || 1048adf30907SEric Dumazet (skb_dst(skb)->flags & DST_NOXFRM) || 10491da177e4SLinus Torvalds __xfrm_route_forward(skb, family); 10501da177e4SLinus Torvalds } 10511da177e4SLinus Torvalds 10521da177e4SLinus Torvalds static inline int xfrm4_route_forward(struct sk_buff *skb) 10531da177e4SLinus Torvalds { 10541da177e4SLinus Torvalds return xfrm_route_forward(skb, AF_INET); 10551da177e4SLinus Torvalds } 10561da177e4SLinus Torvalds 10571da177e4SLinus Torvalds static inline int xfrm6_route_forward(struct sk_buff *skb) 10581da177e4SLinus Torvalds { 10591da177e4SLinus Torvalds return xfrm_route_forward(skb, AF_INET6); 10601da177e4SLinus Torvalds } 10611da177e4SLinus Torvalds 10621da177e4SLinus Torvalds extern int __xfrm_sk_clone_policy(struct sock *sk); 10631da177e4SLinus Torvalds 10641da177e4SLinus Torvalds static inline int xfrm_sk_clone_policy(struct sock *sk) 10651da177e4SLinus Torvalds { 10661da177e4SLinus Torvalds if (unlikely(sk->sk_policy[0] || sk->sk_policy[1])) 10671da177e4SLinus Torvalds return __xfrm_sk_clone_policy(sk); 10681da177e4SLinus Torvalds return 0; 10691da177e4SLinus Torvalds } 10701da177e4SLinus Torvalds 10714666faabSHerbert Xu extern int xfrm_policy_delete(struct xfrm_policy *pol, int dir); 10721da177e4SLinus Torvalds 10731da177e4SLinus Torvalds static inline void xfrm_sk_free_policy(struct sock *sk) 10741da177e4SLinus Torvalds { 10751da177e4SLinus Torvalds if (unlikely(sk->sk_policy[0] != NULL)) { 10761da177e4SLinus Torvalds xfrm_policy_delete(sk->sk_policy[0], XFRM_POLICY_MAX); 10771da177e4SLinus Torvalds sk->sk_policy[0] = NULL; 10781da177e4SLinus Torvalds } 10791da177e4SLinus Torvalds if (unlikely(sk->sk_policy[1] != NULL)) { 10801da177e4SLinus Torvalds xfrm_policy_delete(sk->sk_policy[1], XFRM_POLICY_MAX+1); 10811da177e4SLinus Torvalds sk->sk_policy[1] = NULL; 10821da177e4SLinus Torvalds } 10831da177e4SLinus Torvalds } 10841da177e4SLinus Torvalds 10851da177e4SLinus Torvalds #else 10861da177e4SLinus Torvalds 10871da177e4SLinus Torvalds static inline void xfrm_sk_free_policy(struct sock *sk) {} 10881da177e4SLinus Torvalds static inline int xfrm_sk_clone_policy(struct sock *sk) { return 0; } 10891da177e4SLinus Torvalds static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; } 10901da177e4SLinus Torvalds static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; } 10911da177e4SLinus Torvalds static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 10921da177e4SLinus Torvalds { 10931da177e4SLinus Torvalds return 1; 10941da177e4SLinus Torvalds } 10951da177e4SLinus Torvalds static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 10961da177e4SLinus Torvalds { 10971da177e4SLinus Torvalds return 1; 10981da177e4SLinus Torvalds } 10991da177e4SLinus Torvalds static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) 11001da177e4SLinus Torvalds { 11011da177e4SLinus Torvalds return 1; 11021da177e4SLinus Torvalds } 1103d5422efeSHerbert Xu static inline int xfrm_decode_session_reverse(struct sk_buff *skb, 1104d5422efeSHerbert Xu struct flowi *fl, 1105d5422efeSHerbert Xu unsigned int family) 1106d5422efeSHerbert Xu { 1107d5422efeSHerbert Xu return -ENOSYS; 1108d5422efeSHerbert Xu } 1109d5422efeSHerbert Xu static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir, 1110d5422efeSHerbert Xu struct sk_buff *skb) 1111d5422efeSHerbert Xu { 1112d5422efeSHerbert Xu return 1; 1113d5422efeSHerbert Xu } 1114d5422efeSHerbert Xu static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir, 1115d5422efeSHerbert Xu struct sk_buff *skb) 1116d5422efeSHerbert Xu { 1117d5422efeSHerbert Xu return 1; 1118d5422efeSHerbert Xu } 11191da177e4SLinus Torvalds #endif 11201da177e4SLinus Torvalds 11211da177e4SLinus Torvalds static __inline__ 11221da177e4SLinus Torvalds xfrm_address_t *xfrm_flowi_daddr(struct flowi *fl, unsigned short family) 11231da177e4SLinus Torvalds { 11241da177e4SLinus Torvalds switch (family){ 11251da177e4SLinus Torvalds case AF_INET: 11261da177e4SLinus Torvalds return (xfrm_address_t *)&fl->fl4_dst; 11271da177e4SLinus Torvalds case AF_INET6: 11281da177e4SLinus Torvalds return (xfrm_address_t *)&fl->fl6_dst; 11291da177e4SLinus Torvalds } 11301da177e4SLinus Torvalds return NULL; 11311da177e4SLinus Torvalds } 11321da177e4SLinus Torvalds 11331da177e4SLinus Torvalds static __inline__ 11341da177e4SLinus Torvalds xfrm_address_t *xfrm_flowi_saddr(struct flowi *fl, unsigned short family) 11351da177e4SLinus Torvalds { 11361da177e4SLinus Torvalds switch (family){ 11371da177e4SLinus Torvalds case AF_INET: 11381da177e4SLinus Torvalds return (xfrm_address_t *)&fl->fl4_src; 11391da177e4SLinus Torvalds case AF_INET6: 11401da177e4SLinus Torvalds return (xfrm_address_t *)&fl->fl6_src; 11411da177e4SLinus Torvalds } 11421da177e4SLinus Torvalds return NULL; 11431da177e4SLinus Torvalds } 11441da177e4SLinus Torvalds 11459bb182a7SYOSHIFUJI Hideaki static __inline__ 11469bb182a7SYOSHIFUJI Hideaki void xfrm_flowi_addr_get(struct flowi *fl, 11479bb182a7SYOSHIFUJI Hideaki xfrm_address_t *saddr, xfrm_address_t *daddr, 11489bb182a7SYOSHIFUJI Hideaki unsigned short family) 11499bb182a7SYOSHIFUJI Hideaki { 11509bb182a7SYOSHIFUJI Hideaki switch(family) { 11519bb182a7SYOSHIFUJI Hideaki case AF_INET: 11529bb182a7SYOSHIFUJI Hideaki memcpy(&saddr->a4, &fl->fl4_src, sizeof(saddr->a4)); 11539bb182a7SYOSHIFUJI Hideaki memcpy(&daddr->a4, &fl->fl4_dst, sizeof(daddr->a4)); 11549bb182a7SYOSHIFUJI Hideaki break; 11559bb182a7SYOSHIFUJI Hideaki case AF_INET6: 11569bb182a7SYOSHIFUJI Hideaki ipv6_addr_copy((struct in6_addr *)&saddr->a6, &fl->fl6_src); 11579bb182a7SYOSHIFUJI Hideaki ipv6_addr_copy((struct in6_addr *)&daddr->a6, &fl->fl6_dst); 11589bb182a7SYOSHIFUJI Hideaki break; 11599bb182a7SYOSHIFUJI Hideaki } 11609bb182a7SYOSHIFUJI Hideaki } 11619bb182a7SYOSHIFUJI Hideaki 11621da177e4SLinus Torvalds static __inline__ int 11631da177e4SLinus Torvalds __xfrm4_state_addr_check(struct xfrm_state *x, 11641da177e4SLinus Torvalds xfrm_address_t *daddr, xfrm_address_t *saddr) 11651da177e4SLinus Torvalds { 11661da177e4SLinus Torvalds if (daddr->a4 == x->id.daddr.a4 && 11671da177e4SLinus Torvalds (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4)) 11681da177e4SLinus Torvalds return 1; 11691da177e4SLinus Torvalds return 0; 11701da177e4SLinus Torvalds } 11711da177e4SLinus Torvalds 11721da177e4SLinus Torvalds static __inline__ int 11731da177e4SLinus Torvalds __xfrm6_state_addr_check(struct xfrm_state *x, 11741da177e4SLinus Torvalds xfrm_address_t *daddr, xfrm_address_t *saddr) 11751da177e4SLinus Torvalds { 11761da177e4SLinus Torvalds if (!ipv6_addr_cmp((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) && 11771da177e4SLinus Torvalds (!ipv6_addr_cmp((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr)|| 11781da177e4SLinus Torvalds ipv6_addr_any((struct in6_addr *)saddr) || 11791da177e4SLinus Torvalds ipv6_addr_any((struct in6_addr *)&x->props.saddr))) 11801da177e4SLinus Torvalds return 1; 11811da177e4SLinus Torvalds return 0; 11821da177e4SLinus Torvalds } 11831da177e4SLinus Torvalds 11841da177e4SLinus Torvalds static __inline__ int 11851da177e4SLinus Torvalds xfrm_state_addr_check(struct xfrm_state *x, 11861da177e4SLinus Torvalds xfrm_address_t *daddr, xfrm_address_t *saddr, 11871da177e4SLinus Torvalds unsigned short family) 11881da177e4SLinus Torvalds { 11891da177e4SLinus Torvalds switch (family) { 11901da177e4SLinus Torvalds case AF_INET: 11911da177e4SLinus Torvalds return __xfrm4_state_addr_check(x, daddr, saddr); 11921da177e4SLinus Torvalds case AF_INET6: 11931da177e4SLinus Torvalds return __xfrm6_state_addr_check(x, daddr, saddr); 11941da177e4SLinus Torvalds } 11951da177e4SLinus Torvalds return 0; 11961da177e4SLinus Torvalds } 11971da177e4SLinus Torvalds 1198e53820deSMasahide NAKAMURA static __inline__ int 1199e53820deSMasahide NAKAMURA xfrm_state_addr_flow_check(struct xfrm_state *x, struct flowi *fl, 1200e53820deSMasahide NAKAMURA unsigned short family) 1201e53820deSMasahide NAKAMURA { 1202e53820deSMasahide NAKAMURA switch (family) { 1203e53820deSMasahide NAKAMURA case AF_INET: 1204e53820deSMasahide NAKAMURA return __xfrm4_state_addr_check(x, 1205e53820deSMasahide NAKAMURA (xfrm_address_t *)&fl->fl4_dst, 1206e53820deSMasahide NAKAMURA (xfrm_address_t *)&fl->fl4_src); 1207e53820deSMasahide NAKAMURA case AF_INET6: 1208e53820deSMasahide NAKAMURA return __xfrm6_state_addr_check(x, 1209e53820deSMasahide NAKAMURA (xfrm_address_t *)&fl->fl6_dst, 1210e53820deSMasahide NAKAMURA (xfrm_address_t *)&fl->fl6_src); 1211e53820deSMasahide NAKAMURA } 1212e53820deSMasahide NAKAMURA return 0; 1213e53820deSMasahide NAKAMURA } 1214e53820deSMasahide NAKAMURA 12151da177e4SLinus Torvalds static inline int xfrm_state_kern(struct xfrm_state *x) 12161da177e4SLinus Torvalds { 12171da177e4SLinus Torvalds return atomic_read(&x->tunnel_users); 12181da177e4SLinus Torvalds } 12191da177e4SLinus Torvalds 12205794708fSMasahide NAKAMURA static inline int xfrm_id_proto_match(u8 proto, u8 userproto) 12215794708fSMasahide NAKAMURA { 1222dc00a525SMasahide NAKAMURA return (!userproto || proto == userproto || 1223dc00a525SMasahide NAKAMURA (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH || 1224dc00a525SMasahide NAKAMURA proto == IPPROTO_ESP || 1225dc00a525SMasahide NAKAMURA proto == IPPROTO_COMP))); 12265794708fSMasahide NAKAMURA } 12275794708fSMasahide NAKAMURA 12281da177e4SLinus Torvalds /* 12291da177e4SLinus Torvalds * xfrm algorithm information 12301da177e4SLinus Torvalds */ 12311a6509d9SHerbert Xu struct xfrm_algo_aead_info { 12321a6509d9SHerbert Xu u16 icv_truncbits; 12331a6509d9SHerbert Xu }; 12341a6509d9SHerbert Xu 12351da177e4SLinus Torvalds struct xfrm_algo_auth_info { 12361da177e4SLinus Torvalds u16 icv_truncbits; 12371da177e4SLinus Torvalds u16 icv_fullbits; 12381da177e4SLinus Torvalds }; 12391da177e4SLinus Torvalds 12401da177e4SLinus Torvalds struct xfrm_algo_encr_info { 12411da177e4SLinus Torvalds u16 blockbits; 12421da177e4SLinus Torvalds u16 defkeybits; 12431da177e4SLinus Torvalds }; 12441da177e4SLinus Torvalds 12451da177e4SLinus Torvalds struct xfrm_algo_comp_info { 12461da177e4SLinus Torvalds u16 threshold; 12471da177e4SLinus Torvalds }; 12481da177e4SLinus Torvalds 12491da177e4SLinus Torvalds struct xfrm_algo_desc { 12501da177e4SLinus Torvalds char *name; 125104ff1260SHerbert Xu char *compat; 12521da177e4SLinus Torvalds u8 available:1; 12531da177e4SLinus Torvalds union { 12541a6509d9SHerbert Xu struct xfrm_algo_aead_info aead; 12551da177e4SLinus Torvalds struct xfrm_algo_auth_info auth; 12561da177e4SLinus Torvalds struct xfrm_algo_encr_info encr; 12571da177e4SLinus Torvalds struct xfrm_algo_comp_info comp; 12581da177e4SLinus Torvalds } uinfo; 12591da177e4SLinus Torvalds struct sadb_alg desc; 12601da177e4SLinus Torvalds }; 12611da177e4SLinus Torvalds 12621da177e4SLinus Torvalds /* XFRM tunnel handlers. */ 12631da177e4SLinus Torvalds struct xfrm_tunnel { 12641da177e4SLinus Torvalds int (*handler)(struct sk_buff *skb); 1265a6337463Sjamal int (*err_handler)(struct sk_buff *skb, u32 info); 1266d2acc347SHerbert Xu 1267d2acc347SHerbert Xu struct xfrm_tunnel *next; 1268d2acc347SHerbert Xu int priority; 12691da177e4SLinus Torvalds }; 12701da177e4SLinus Torvalds 12711da177e4SLinus Torvalds struct xfrm6_tunnel { 1272d2acc347SHerbert Xu int (*handler)(struct sk_buff *skb); 1273d2acc347SHerbert Xu int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt, 1274d5fdd6baSBrian Haley u8 type, u8 code, int offset, __be32 info); 12756f0bcf15SEric Dumazet struct xfrm6_tunnel __rcu *next; 1276d2acc347SHerbert Xu int priority; 12771da177e4SLinus Torvalds }; 12781da177e4SLinus Torvalds 12791da177e4SLinus Torvalds extern void xfrm_init(void); 1280a33bc5c1SNeil Horman extern void xfrm4_init(int rt_hash_size); 1281d62ddc21SAlexey Dobriyan extern int xfrm_state_init(struct net *net); 1282d62ddc21SAlexey Dobriyan extern void xfrm_state_fini(struct net *net); 12831da177e4SLinus Torvalds extern void xfrm4_state_init(void); 1284c35b7e72SDaniel Lezcano #ifdef CONFIG_XFRM 1285c35b7e72SDaniel Lezcano extern int xfrm6_init(void); 1286c35b7e72SDaniel Lezcano extern void xfrm6_fini(void); 12870013cabaSDaniel Lezcano extern int xfrm6_state_init(void); 12881da177e4SLinus Torvalds extern void xfrm6_state_fini(void); 1289c35b7e72SDaniel Lezcano #else 1290c35b7e72SDaniel Lezcano static inline int xfrm6_init(void) 1291c35b7e72SDaniel Lezcano { 1292c35b7e72SDaniel Lezcano return 0; 1293c35b7e72SDaniel Lezcano } 1294c35b7e72SDaniel Lezcano static inline void xfrm6_fini(void) 1295c35b7e72SDaniel Lezcano { 1296c35b7e72SDaniel Lezcano ; 1297c35b7e72SDaniel Lezcano } 1298c35b7e72SDaniel Lezcano #endif 12991da177e4SLinus Torvalds 1300558f82efSMasahide NAKAMURA #ifdef CONFIG_XFRM_STATISTICS 1301c68cd1a0SAlexey Dobriyan extern int xfrm_proc_init(struct net *net); 1302c68cd1a0SAlexey Dobriyan extern void xfrm_proc_fini(struct net *net); 1303558f82efSMasahide NAKAMURA #endif 1304558f82efSMasahide NAKAMURA 1305b27aeadbSAlexey Dobriyan extern int xfrm_sysctl_init(struct net *net); 1306b27aeadbSAlexey Dobriyan #ifdef CONFIG_SYSCTL 1307b27aeadbSAlexey Dobriyan extern void xfrm_sysctl_fini(struct net *net); 1308b27aeadbSAlexey Dobriyan #else 1309b27aeadbSAlexey Dobriyan static inline void xfrm_sysctl_fini(struct net *net) 1310b27aeadbSAlexey Dobriyan { 1311b27aeadbSAlexey Dobriyan } 1312b27aeadbSAlexey Dobriyan #endif 1313b27aeadbSAlexey Dobriyan 13145c182458SHerbert Xu extern void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto); 1315284fa7daSAlexey Dobriyan extern int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk, 13164c563f76STimo Teras int (*func)(struct xfrm_state *, int, void*), void *); 1317abb81c4fSHerbert Xu extern void xfrm_state_walk_done(struct xfrm_state_walk *walk); 1318673c09beSAlexey Dobriyan extern struct xfrm_state *xfrm_state_alloc(struct net *net); 13191da177e4SLinus Torvalds extern struct xfrm_state *xfrm_state_find(xfrm_address_t *daddr, xfrm_address_t *saddr, 13201da177e4SLinus Torvalds struct flowi *fl, struct xfrm_tmpl *tmpl, 13211da177e4SLinus Torvalds struct xfrm_policy *pol, int *err, 13221da177e4SLinus Torvalds unsigned short family); 1323bd55775cSJamal Hadi Salim extern struct xfrm_state *xfrm_stateonly_find(struct net *net, u32 mark, 13245447c5e4SAlexey Dobriyan xfrm_address_t *daddr, 1325628529b6SJamal Hadi Salim xfrm_address_t *saddr, 1326628529b6SJamal Hadi Salim unsigned short family, 1327628529b6SJamal Hadi Salim u8 mode, u8 proto, u32 reqid); 13281da177e4SLinus Torvalds extern int xfrm_state_check_expire(struct xfrm_state *x); 13291da177e4SLinus Torvalds extern void xfrm_state_insert(struct xfrm_state *x); 13301da177e4SLinus Torvalds extern int xfrm_state_add(struct xfrm_state *x); 13311da177e4SLinus Torvalds extern int xfrm_state_update(struct xfrm_state *x); 1332bd55775cSJamal Hadi Salim extern struct xfrm_state *xfrm_state_lookup(struct net *net, u32 mark, 1333bd55775cSJamal Hadi Salim xfrm_address_t *daddr, __be32 spi, 1334bd55775cSJamal Hadi Salim u8 proto, unsigned short family); 1335bd55775cSJamal Hadi Salim extern struct xfrm_state *xfrm_state_lookup_byaddr(struct net *net, u32 mark, 1336bd55775cSJamal Hadi Salim xfrm_address_t *daddr, 1337bd55775cSJamal Hadi Salim xfrm_address_t *saddr, 1338bd55775cSJamal Hadi Salim u8 proto, 1339bd55775cSJamal Hadi Salim unsigned short family); 134041a49cc3SMasahide NAKAMURA #ifdef CONFIG_XFRM_SUB_POLICY 134141a49cc3SMasahide NAKAMURA extern int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, 134241a49cc3SMasahide NAKAMURA int n, unsigned short family); 134341a49cc3SMasahide NAKAMURA extern int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, 134441a49cc3SMasahide NAKAMURA int n, unsigned short family); 134541a49cc3SMasahide NAKAMURA #else 134641a49cc3SMasahide NAKAMURA static inline int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, 134741a49cc3SMasahide NAKAMURA int n, unsigned short family) 134841a49cc3SMasahide NAKAMURA { 134941a49cc3SMasahide NAKAMURA return -ENOSYS; 135041a49cc3SMasahide NAKAMURA } 135141a49cc3SMasahide NAKAMURA 135241a49cc3SMasahide NAKAMURA static inline int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, 135341a49cc3SMasahide NAKAMURA int n, unsigned short family) 135441a49cc3SMasahide NAKAMURA { 135541a49cc3SMasahide NAKAMURA return -ENOSYS; 135641a49cc3SMasahide NAKAMURA } 135741a49cc3SMasahide NAKAMURA #endif 1358af11e316SJamal Hadi Salim 1359af11e316SJamal Hadi Salim struct xfrmk_sadinfo { 1360af11e316SJamal Hadi Salim u32 sadhcnt; /* current hash bkts */ 1361af11e316SJamal Hadi Salim u32 sadhmcnt; /* max allowed hash bkts */ 1362af11e316SJamal Hadi Salim u32 sadcnt; /* current running count */ 1363af11e316SJamal Hadi Salim }; 1364af11e316SJamal Hadi Salim 13655a6d3416SJamal Hadi Salim struct xfrmk_spdinfo { 13665a6d3416SJamal Hadi Salim u32 incnt; 13675a6d3416SJamal Hadi Salim u32 outcnt; 13685a6d3416SJamal Hadi Salim u32 fwdcnt; 13695a6d3416SJamal Hadi Salim u32 inscnt; 13705a6d3416SJamal Hadi Salim u32 outscnt; 13715a6d3416SJamal Hadi Salim u32 fwdscnt; 13725a6d3416SJamal Hadi Salim u32 spdhcnt; 13735a6d3416SJamal Hadi Salim u32 spdhmcnt; 13745a6d3416SJamal Hadi Salim }; 13755a6d3416SJamal Hadi Salim 1376bd55775cSJamal Hadi Salim extern struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, 1377bd55775cSJamal Hadi Salim u32 seq); 137826b15dadSJamal Hadi Salim extern int xfrm_state_delete(struct xfrm_state *x); 13790e602451SAlexey Dobriyan extern int xfrm_state_flush(struct net *net, u8 proto, struct xfrm_audit *audit_info); 1380e071041bSAlexey Dobriyan extern void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si); 1381e071041bSAlexey Dobriyan extern void xfrm_spd_getinfo(struct net *net, struct xfrmk_spdinfo *si); 1382afeb14b4SPaul Moore extern int xfrm_replay_check(struct xfrm_state *x, 1383afeb14b4SPaul Moore struct sk_buff *skb, __be32 seq); 138461f4627bSAl Viro extern void xfrm_replay_advance(struct xfrm_state *x, __be32 seq); 1385f8cd5488SJamal Hadi Salim extern void xfrm_replay_notify(struct xfrm_state *x, int event); 13861da177e4SLinus Torvalds extern int xfrm_state_mtu(struct xfrm_state *x, int mtu); 138772cb6962SHerbert Xu extern int xfrm_init_state(struct xfrm_state *x); 1388227620e2SHerbert Xu extern int xfrm_prepare_input(struct xfrm_state *x, struct sk_buff *skb); 1389716062fdSHerbert Xu extern int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, 1390716062fdSHerbert Xu int encap_type); 13911bf06cd2SHerbert Xu extern int xfrm_input_resume(struct sk_buff *skb, int nexthdr); 1392c6581a45SHerbert Xu extern int xfrm_output_resume(struct sk_buff *skb, int err); 1393406ef77cSHerbert Xu extern int xfrm_output(struct sk_buff *skb); 1394df9dcb45SKazunori MIYAZAWA extern int xfrm_inner_extract_output(struct xfrm_state *x, struct sk_buff *skb); 139536cf9acfSHerbert Xu extern int xfrm4_extract_header(struct sk_buff *skb); 1396227620e2SHerbert Xu extern int xfrm4_extract_input(struct xfrm_state *x, struct sk_buff *skb); 1397c4541b41SHerbert Xu extern int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi, 1398c4541b41SHerbert Xu int encap_type); 1399716062fdSHerbert Xu extern int xfrm4_transport_finish(struct sk_buff *skb, int async); 14001da177e4SLinus Torvalds extern int xfrm4_rcv(struct sk_buff *skb); 1401c4541b41SHerbert Xu 1402c4541b41SHerbert Xu static inline int xfrm4_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi) 1403c4541b41SHerbert Xu { 1404c4541b41SHerbert Xu return xfrm4_rcv_encap(skb, nexthdr, spi, 0); 1405c4541b41SHerbert Xu } 1406c4541b41SHerbert Xu 140736cf9acfSHerbert Xu extern int xfrm4_extract_output(struct xfrm_state *x, struct sk_buff *skb); 140836cf9acfSHerbert Xu extern int xfrm4_prepare_output(struct xfrm_state *x, struct sk_buff *skb); 14091da177e4SLinus Torvalds extern int xfrm4_output(struct sk_buff *skb); 1410c0d56408SKazunori MIYAZAWA extern int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family); 1411c0d56408SKazunori MIYAZAWA extern int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family); 141236cf9acfSHerbert Xu extern int xfrm6_extract_header(struct sk_buff *skb); 1413227620e2SHerbert Xu extern int xfrm6_extract_input(struct xfrm_state *x, struct sk_buff *skb); 141433b5ecb8SHerbert Xu extern int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi); 1415716062fdSHerbert Xu extern int xfrm6_transport_finish(struct sk_buff *skb, int async); 1416e5bbef20SHerbert Xu extern int xfrm6_rcv(struct sk_buff *skb); 1417fbd9a5b4SMasahide NAKAMURA extern int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr, 1418fbd9a5b4SMasahide NAKAMURA xfrm_address_t *saddr, u8 proto); 141973d605d1SKazunori MIYAZAWA extern int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family); 142073d605d1SKazunori MIYAZAWA extern int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family); 1421a1664773SAlexey Dobriyan extern __be32 xfrm6_tunnel_alloc_spi(struct net *net, xfrm_address_t *saddr); 1422a1664773SAlexey Dobriyan extern __be32 xfrm6_tunnel_spi_lookup(struct net *net, xfrm_address_t *saddr); 142336cf9acfSHerbert Xu extern int xfrm6_extract_output(struct xfrm_state *x, struct sk_buff *skb); 142436cf9acfSHerbert Xu extern int xfrm6_prepare_output(struct xfrm_state *x, struct sk_buff *skb); 14251da177e4SLinus Torvalds extern int xfrm6_output(struct sk_buff *skb); 1426aee5adb4SMasahide NAKAMURA extern int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb, 1427aee5adb4SMasahide NAKAMURA u8 **prevhdr); 14281da177e4SLinus Torvalds 14291da177e4SLinus Torvalds #ifdef CONFIG_XFRM 1430067b207bSJames Chapman extern int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb); 14311da177e4SLinus Torvalds extern int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen); 14321da177e4SLinus Torvalds #else 14331da177e4SLinus Torvalds static inline int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen) 14341da177e4SLinus Torvalds { 14351da177e4SLinus Torvalds return -ENOPROTOOPT; 14361da177e4SLinus Torvalds } 14371da177e4SLinus Torvalds 1438067b207bSJames Chapman static inline int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb) 14391da177e4SLinus Torvalds { 14401da177e4SLinus Torvalds /* should not happen */ 14411da177e4SLinus Torvalds kfree_skb(skb); 14421da177e4SLinus Torvalds return 0; 14431da177e4SLinus Torvalds } 14441da177e4SLinus Torvalds #endif 14451da177e4SLinus Torvalds 14460331b1f3SAlexey Dobriyan struct xfrm_policy *xfrm_policy_alloc(struct net *net, gfp_t gfp); 14474c563f76STimo Teras 144812a169e7SHerbert Xu extern void xfrm_policy_walk_init(struct xfrm_policy_walk *walk, u8 type); 1449cdcbca7cSAlexey Dobriyan extern int xfrm_policy_walk(struct net *net, struct xfrm_policy_walk *walk, 14504c563f76STimo Teras int (*func)(struct xfrm_policy *, int, int, void*), void *); 145112a169e7SHerbert Xu extern void xfrm_policy_walk_done(struct xfrm_policy_walk *walk); 14521da177e4SLinus Torvalds int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl); 14538ca2e93bSJamal Hadi Salim struct xfrm_policy *xfrm_policy_bysel_ctx(struct net *net, u32 mark, 14548ca2e93bSJamal Hadi Salim u8 type, int dir, 14554e81bb83SMasahide NAKAMURA struct xfrm_selector *sel, 1456ef41aaa0SEric Paris struct xfrm_sec_ctx *ctx, int delete, 1457ef41aaa0SEric Paris int *err); 14588ca2e93bSJamal Hadi Salim struct xfrm_policy *xfrm_policy_byid(struct net *net, u32 mark, u8, int dir, u32 id, int delete, int *err); 145933ffbbd5SAlexey Dobriyan int xfrm_policy_flush(struct net *net, u8 type, struct xfrm_audit *audit_info); 14601da177e4SLinus Torvalds u32 xfrm_get_acqseq(void); 1461658b219eSHerbert Xu extern int xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi); 1462bd55775cSJamal Hadi Salim struct xfrm_state *xfrm_find_acq(struct net *net, struct xfrm_mark *mark, 1463bd55775cSJamal Hadi Salim u8 mode, u32 reqid, u8 proto, 1464bd55775cSJamal Hadi Salim xfrm_address_t *daddr, 1465bd55775cSJamal Hadi Salim xfrm_address_t *saddr, int create, 1466bd55775cSJamal Hadi Salim unsigned short family); 14671da177e4SLinus Torvalds extern int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol); 14681da177e4SLinus Torvalds 146980c9abaaSShinta Sugimoto #ifdef CONFIG_XFRM_MIGRATE 147080c9abaaSShinta Sugimoto extern int km_migrate(struct xfrm_selector *sel, u8 dir, u8 type, 147113c1d189SArnaud Ebalard struct xfrm_migrate *m, int num_bundles, 147213c1d189SArnaud Ebalard struct xfrm_kmaddress *k); 147380c9abaaSShinta Sugimoto extern struct xfrm_state * xfrm_migrate_state_find(struct xfrm_migrate *m); 147480c9abaaSShinta Sugimoto extern struct xfrm_state * xfrm_state_migrate(struct xfrm_state *x, 147580c9abaaSShinta Sugimoto struct xfrm_migrate *m); 147680c9abaaSShinta Sugimoto extern int xfrm_migrate(struct xfrm_selector *sel, u8 dir, u8 type, 147713c1d189SArnaud Ebalard struct xfrm_migrate *m, int num_bundles, 147813c1d189SArnaud Ebalard struct xfrm_kmaddress *k); 147980c9abaaSShinta Sugimoto #endif 148080c9abaaSShinta Sugimoto 14815d36b180SAl Viro extern int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); 14826c5c8ca7SJamal Hadi Salim extern void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 pid); 1483db983c11SAlexey Dobriyan extern int km_report(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr); 14841da177e4SLinus Torvalds 14851da177e4SLinus Torvalds extern void xfrm_input_init(void); 14866067b2baSAl Viro extern int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq); 14871da177e4SLinus Torvalds 14881da177e4SLinus Torvalds extern void xfrm_probe_algs(void); 14891da177e4SLinus Torvalds extern int xfrm_count_auth_supported(void); 14901da177e4SLinus Torvalds extern int xfrm_count_enc_supported(void); 14911da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx); 14921da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx); 14931da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id); 14941da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id); 14951da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id); 14961da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_aalg_get_byname(char *name, int probe); 14971da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_ealg_get_byname(char *name, int probe); 14981da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_calg_get_byname(char *name, int probe); 14991a6509d9SHerbert Xu extern struct xfrm_algo_desc *xfrm_aead_get_byname(char *name, int icv_len, 15001a6509d9SHerbert Xu int probe); 15011da177e4SLinus Torvalds 150207d4ee58SHerbert Xu struct hash_desc; 15039409f38aSHerbert Xu struct scatterlist; 150407d4ee58SHerbert Xu typedef int (icv_update_fn_t)(struct hash_desc *, struct scatterlist *, 150507d4ee58SHerbert Xu unsigned int); 15061da177e4SLinus Torvalds 15071da177e4SLinus Torvalds static inline int xfrm_addr_cmp(xfrm_address_t *a, xfrm_address_t *b, 15081da177e4SLinus Torvalds int family) 15091da177e4SLinus Torvalds { 15101da177e4SLinus Torvalds switch (family) { 15111da177e4SLinus Torvalds default: 15121da177e4SLinus Torvalds case AF_INET: 1513a6337463Sjamal return (__force u32)a->a4 - (__force u32)b->a4; 15141da177e4SLinus Torvalds case AF_INET6: 15151da177e4SLinus Torvalds return ipv6_addr_cmp((struct in6_addr *)a, 15161da177e4SLinus Torvalds (struct in6_addr *)b); 15171da177e4SLinus Torvalds } 15181da177e4SLinus Torvalds } 15191da177e4SLinus Torvalds 152077d8d7a6SHerbert Xu static inline int xfrm_policy_id2dir(u32 index) 152177d8d7a6SHerbert Xu { 152277d8d7a6SHerbert Xu return index & 7; 152377d8d7a6SHerbert Xu } 152477d8d7a6SHerbert Xu 1525a6483b79SAlexey Dobriyan #ifdef CONFIG_XFRM 1526a6483b79SAlexey Dobriyan static inline int xfrm_aevent_is_on(struct net *net) 1527f8cd5488SJamal Hadi Salim { 1528be33690dSPatrick McHardy struct sock *nlsk; 1529be33690dSPatrick McHardy int ret = 0; 1530be33690dSPatrick McHardy 1531be33690dSPatrick McHardy rcu_read_lock(); 1532a6483b79SAlexey Dobriyan nlsk = rcu_dereference(net->xfrm.nlsk); 1533be33690dSPatrick McHardy if (nlsk) 1534be33690dSPatrick McHardy ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS); 1535be33690dSPatrick McHardy rcu_read_unlock(); 1536be33690dSPatrick McHardy return ret; 1537f8cd5488SJamal Hadi Salim } 1538a6483b79SAlexey Dobriyan #endif 1539f8cd5488SJamal Hadi Salim 15400f99be0dSEric Dumazet static inline int xfrm_alg_len(struct xfrm_algo *alg) 15410f99be0dSEric Dumazet { 15420f99be0dSEric Dumazet return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); 15430f99be0dSEric Dumazet } 15440f99be0dSEric Dumazet 15454447bb33SMartin Willi static inline int xfrm_alg_auth_len(struct xfrm_algo_auth *alg) 15464447bb33SMartin Willi { 15474447bb33SMartin Willi return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); 15484447bb33SMartin Willi } 15494447bb33SMartin Willi 155080c9abaaSShinta Sugimoto #ifdef CONFIG_XFRM_MIGRATE 155180c9abaaSShinta Sugimoto static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig) 155280c9abaaSShinta Sugimoto { 15530f99be0dSEric Dumazet return kmemdup(orig, xfrm_alg_len(orig), GFP_KERNEL); 155480c9abaaSShinta Sugimoto } 155580c9abaaSShinta Sugimoto 15564447bb33SMartin Willi static inline struct xfrm_algo_auth *xfrm_algo_auth_clone(struct xfrm_algo_auth *orig) 15574447bb33SMartin Willi { 15584447bb33SMartin Willi return kmemdup(orig, xfrm_alg_auth_len(orig), GFP_KERNEL); 15594447bb33SMartin Willi } 15604447bb33SMartin Willi 156180c9abaaSShinta Sugimoto static inline void xfrm_states_put(struct xfrm_state **states, int n) 156280c9abaaSShinta Sugimoto { 156380c9abaaSShinta Sugimoto int i; 156480c9abaaSShinta Sugimoto for (i = 0; i < n; i++) 156580c9abaaSShinta Sugimoto xfrm_state_put(*(states + i)); 156680c9abaaSShinta Sugimoto } 156780c9abaaSShinta Sugimoto 156880c9abaaSShinta Sugimoto static inline void xfrm_states_delete(struct xfrm_state **states, int n) 156980c9abaaSShinta Sugimoto { 157080c9abaaSShinta Sugimoto int i; 157180c9abaaSShinta Sugimoto for (i = 0; i < n; i++) 157280c9abaaSShinta Sugimoto xfrm_state_delete(*(states + i)); 157380c9abaaSShinta Sugimoto } 157480c9abaaSShinta Sugimoto #endif 1575f8cd5488SJamal Hadi Salim 1576def8b4faSAlexey Dobriyan #ifdef CONFIG_XFRM 157700501121SHerbert Xu static inline struct xfrm_state *xfrm_input_state(struct sk_buff *skb) 157800501121SHerbert Xu { 157900501121SHerbert Xu return skb->sp->xvec[skb->sp->len - 1]; 158000501121SHerbert Xu } 1581def8b4faSAlexey Dobriyan #endif 158200501121SHerbert Xu 1583bf825f81SJamal Hadi Salim static inline int xfrm_mark_get(struct nlattr **attrs, struct xfrm_mark *m) 1584bf825f81SJamal Hadi Salim { 1585bf825f81SJamal Hadi Salim if (attrs[XFRMA_MARK]) 15864efd7e83SAndreas Steffen memcpy(m, nla_data(attrs[XFRMA_MARK]), sizeof(struct xfrm_mark)); 1587bf825f81SJamal Hadi Salim else 1588bf825f81SJamal Hadi Salim m->v = m->m = 0; 1589bf825f81SJamal Hadi Salim 1590bf825f81SJamal Hadi Salim return m->v & m->m; 1591bf825f81SJamal Hadi Salim } 1592bf825f81SJamal Hadi Salim 1593bf825f81SJamal Hadi Salim static inline int xfrm_mark_put(struct sk_buff *skb, struct xfrm_mark *m) 1594bf825f81SJamal Hadi Salim { 1595bf825f81SJamal Hadi Salim if (m->m | m->v) 1596bf825f81SJamal Hadi Salim NLA_PUT(skb, XFRMA_MARK, sizeof(struct xfrm_mark), m); 1597bf825f81SJamal Hadi Salim return 0; 1598bf825f81SJamal Hadi Salim 1599bf825f81SJamal Hadi Salim nla_put_failure: 1600bf825f81SJamal Hadi Salim return -1; 1601bf825f81SJamal Hadi Salim } 1602bf825f81SJamal Hadi Salim 16031da177e4SLinus Torvalds #endif /* _NET_XFRM_H */ 1604