11da177e4SLinus Torvalds #ifndef _NET_XFRM_H 21da177e4SLinus Torvalds #define _NET_XFRM_H 31da177e4SLinus Torvalds 4aabc9761SHerbert Xu #include <linux/compiler.h> 514c85021SArnaldo Carvalho de Melo #include <linux/in.h> 61da177e4SLinus Torvalds #include <linux/xfrm.h> 71da177e4SLinus Torvalds #include <linux/spinlock.h> 81da177e4SLinus Torvalds #include <linux/list.h> 91da177e4SLinus Torvalds #include <linux/skbuff.h> 1014c85021SArnaldo Carvalho de Melo #include <linux/socket.h> 111da177e4SLinus Torvalds #include <linux/pfkeyv2.h> 125794708fSMasahide NAKAMURA #include <linux/ipsec.h> 131da177e4SLinus Torvalds #include <linux/in6.h> 144a3e2f71SArjan van de Ven #include <linux/mutex.h> 151da177e4SLinus Torvalds 161da177e4SLinus Torvalds #include <net/sock.h> 171da177e4SLinus Torvalds #include <net/dst.h> 181da177e4SLinus Torvalds #include <net/route.h> 191da177e4SLinus Torvalds #include <net/ipv6.h> 201da177e4SLinus Torvalds #include <net/ip6_fib.h> 211da177e4SLinus Torvalds 221da177e4SLinus Torvalds #define XFRM_ALIGN8(len) (((len) + 7) & ~7) 23b59f45d0SHerbert Xu #define MODULE_ALIAS_XFRM_MODE(family, encap) \ 24b59f45d0SHerbert Xu MODULE_ALIAS("xfrm-mode-" __stringify(family) "-" __stringify(encap)) 251da177e4SLinus Torvalds 26f8cd5488SJamal Hadi Salim extern struct sock *xfrm_nl; 27f8cd5488SJamal Hadi Salim extern u32 sysctl_xfrm_aevent_etime; 28f8cd5488SJamal Hadi Salim extern u32 sysctl_xfrm_aevent_rseqth; 29f8cd5488SJamal Hadi Salim 304a3e2f71SArjan van de Ven extern struct mutex xfrm_cfg_mutex; 311da177e4SLinus Torvalds 321da177e4SLinus Torvalds /* Organization of SPD aka "XFRM rules" 331da177e4SLinus Torvalds ------------------------------------ 341da177e4SLinus Torvalds 351da177e4SLinus Torvalds Basic objects: 361da177e4SLinus Torvalds - policy rule, struct xfrm_policy (=SPD entry) 371da177e4SLinus Torvalds - bundle of transformations, struct dst_entry == struct xfrm_dst (=SA bundle) 381da177e4SLinus Torvalds - instance of a transformer, struct xfrm_state (=SA) 391da177e4SLinus Torvalds - template to clone xfrm_state, struct xfrm_tmpl 401da177e4SLinus Torvalds 411da177e4SLinus Torvalds SPD is plain linear list of xfrm_policy rules, ordered by priority. 421da177e4SLinus Torvalds (To be compatible with existing pfkeyv2 implementations, 431da177e4SLinus Torvalds many rules with priority of 0x7fffffff are allowed to exist and 441da177e4SLinus Torvalds such rules are ordered in an unpredictable way, thanks to bsd folks.) 451da177e4SLinus Torvalds 461da177e4SLinus Torvalds Lookup is plain linear search until the first match with selector. 471da177e4SLinus Torvalds 481da177e4SLinus Torvalds If "action" is "block", then we prohibit the flow, otherwise: 491da177e4SLinus Torvalds if "xfrms_nr" is zero, the flow passes untransformed. Otherwise, 501da177e4SLinus Torvalds policy entry has list of up to XFRM_MAX_DEPTH transformations, 511da177e4SLinus Torvalds described by templates xfrm_tmpl. Each template is resolved 521da177e4SLinus Torvalds to a complete xfrm_state (see below) and we pack bundle of transformations 531da177e4SLinus Torvalds to a dst_entry returned to requestor. 541da177e4SLinus Torvalds 551da177e4SLinus Torvalds dst -. xfrm .-> xfrm_state #1 561da177e4SLinus Torvalds |---. child .-> dst -. xfrm .-> xfrm_state #2 571da177e4SLinus Torvalds |---. child .-> dst -. xfrm .-> xfrm_state #3 581da177e4SLinus Torvalds |---. child .-> NULL 591da177e4SLinus Torvalds 601da177e4SLinus Torvalds Bundles are cached at xrfm_policy struct (field ->bundles). 611da177e4SLinus Torvalds 621da177e4SLinus Torvalds 631da177e4SLinus Torvalds Resolution of xrfm_tmpl 641da177e4SLinus Torvalds ----------------------- 651da177e4SLinus Torvalds Template contains: 661da177e4SLinus Torvalds 1. ->mode Mode: transport or tunnel 671da177e4SLinus Torvalds 2. ->id.proto Protocol: AH/ESP/IPCOMP 681da177e4SLinus Torvalds 3. ->id.daddr Remote tunnel endpoint, ignored for transport mode. 691da177e4SLinus Torvalds Q: allow to resolve security gateway? 701da177e4SLinus Torvalds 4. ->id.spi If not zero, static SPI. 711da177e4SLinus Torvalds 5. ->saddr Local tunnel endpoint, ignored for transport mode. 721da177e4SLinus Torvalds 6. ->algos List of allowed algos. Plain bitmask now. 731da177e4SLinus Torvalds Q: ealgos, aalgos, calgos. What a mess... 741da177e4SLinus Torvalds 7. ->share Sharing mode. 751da177e4SLinus Torvalds Q: how to implement private sharing mode? To add struct sock* to 761da177e4SLinus Torvalds flow id? 771da177e4SLinus Torvalds 781da177e4SLinus Torvalds Having this template we search through SAD searching for entries 791da177e4SLinus Torvalds with appropriate mode/proto/algo, permitted by selector. 801da177e4SLinus Torvalds If no appropriate entry found, it is requested from key manager. 811da177e4SLinus Torvalds 821da177e4SLinus Torvalds PROBLEMS: 831da177e4SLinus Torvalds Q: How to find all the bundles referring to a physical path for 841da177e4SLinus Torvalds PMTU discovery? Seems, dst should contain list of all parents... 851da177e4SLinus Torvalds and enter to infinite locking hierarchy disaster. 861da177e4SLinus Torvalds No! It is easier, we will not search for them, let them find us. 871da177e4SLinus Torvalds We add genid to each dst plus pointer to genid of raw IP route, 881da177e4SLinus Torvalds pmtu disc will update pmtu on raw IP route and increase its genid. 891da177e4SLinus Torvalds dst_check() will see this for top level and trigger resyncing 901da177e4SLinus Torvalds metrics. Plus, it will be made via sk->sk_dst_cache. Solved. 911da177e4SLinus Torvalds */ 921da177e4SLinus Torvalds 931da177e4SLinus Torvalds /* Full description of state of transformer. */ 941da177e4SLinus Torvalds struct xfrm_state 951da177e4SLinus Torvalds { 961da177e4SLinus Torvalds /* Note: bydst is re-used during gc */ 978f126e37SDavid S. Miller struct hlist_node bydst; 988f126e37SDavid S. Miller struct hlist_node bysrc; 998f126e37SDavid S. Miller struct hlist_node byspi; 1001da177e4SLinus Torvalds 1011da177e4SLinus Torvalds atomic_t refcnt; 1021da177e4SLinus Torvalds spinlock_t lock; 1031da177e4SLinus Torvalds 1041da177e4SLinus Torvalds struct xfrm_id id; 1051da177e4SLinus Torvalds struct xfrm_selector sel; 1061da177e4SLinus Torvalds 1079d4a706dSDavid S. Miller u32 genid; 1089d4a706dSDavid S. Miller 1091da177e4SLinus Torvalds /* Key manger bits */ 1101da177e4SLinus Torvalds struct { 1111da177e4SLinus Torvalds u8 state; 1121da177e4SLinus Torvalds u8 dying; 1131da177e4SLinus Torvalds u32 seq; 1141da177e4SLinus Torvalds } km; 1151da177e4SLinus Torvalds 1161da177e4SLinus Torvalds /* Parameters of this state. */ 1171da177e4SLinus Torvalds struct { 1181da177e4SLinus Torvalds u32 reqid; 1191da177e4SLinus Torvalds u8 mode; 1201da177e4SLinus Torvalds u8 replay_window; 1211da177e4SLinus Torvalds u8 aalgo, ealgo, calgo; 1221da177e4SLinus Torvalds u8 flags; 1231da177e4SLinus Torvalds u16 family; 1241da177e4SLinus Torvalds xfrm_address_t saddr; 1251da177e4SLinus Torvalds int header_len; 1261da177e4SLinus Torvalds int trailer_len; 1271da177e4SLinus Torvalds } props; 1281da177e4SLinus Torvalds 1291da177e4SLinus Torvalds struct xfrm_lifetime_cfg lft; 1301da177e4SLinus Torvalds 1311da177e4SLinus Torvalds /* Data for transformer */ 1321da177e4SLinus Torvalds struct xfrm_algo *aalg; 1331da177e4SLinus Torvalds struct xfrm_algo *ealg; 1341da177e4SLinus Torvalds struct xfrm_algo *calg; 1351da177e4SLinus Torvalds 1361da177e4SLinus Torvalds /* Data for encapsulator */ 1371da177e4SLinus Torvalds struct xfrm_encap_tmpl *encap; 1381da177e4SLinus Torvalds 139060f02a3SNoriaki TAKAMIYA /* Data for care-of address */ 140060f02a3SNoriaki TAKAMIYA xfrm_address_t *coaddr; 141060f02a3SNoriaki TAKAMIYA 1421da177e4SLinus Torvalds /* IPComp needs an IPIP tunnel for handling uncompressed packets */ 1431da177e4SLinus Torvalds struct xfrm_state *tunnel; 1441da177e4SLinus Torvalds 1451da177e4SLinus Torvalds /* If a tunnel, number of users + 1 */ 1461da177e4SLinus Torvalds atomic_t tunnel_users; 1471da177e4SLinus Torvalds 1481da177e4SLinus Torvalds /* State for replay detection */ 1491da177e4SLinus Torvalds struct xfrm_replay_state replay; 1501da177e4SLinus Torvalds 151f8cd5488SJamal Hadi Salim /* Replay detection state at the time we sent the last notification */ 152f8cd5488SJamal Hadi Salim struct xfrm_replay_state preplay; 153f8cd5488SJamal Hadi Salim 1542717096aSJamal Hadi Salim /* internal flag that only holds state for delayed aevent at the 1552717096aSJamal Hadi Salim * moment 1562717096aSJamal Hadi Salim */ 1572717096aSJamal Hadi Salim u32 xflags; 1582717096aSJamal Hadi Salim 159f8cd5488SJamal Hadi Salim /* Replay detection notification settings */ 160f8cd5488SJamal Hadi Salim u32 replay_maxage; 161f8cd5488SJamal Hadi Salim u32 replay_maxdiff; 162f8cd5488SJamal Hadi Salim 163f8cd5488SJamal Hadi Salim /* Replay detection notification timer */ 164f8cd5488SJamal Hadi Salim struct timer_list rtimer; 165f8cd5488SJamal Hadi Salim 1661da177e4SLinus Torvalds /* Statistics */ 1671da177e4SLinus Torvalds struct xfrm_stats stats; 1681da177e4SLinus Torvalds 1691da177e4SLinus Torvalds struct xfrm_lifetime_cur curlft; 1701da177e4SLinus Torvalds struct timer_list timer; 1711da177e4SLinus Torvalds 1729afaca05SMasahide NAKAMURA /* Last used time */ 1739afaca05SMasahide NAKAMURA u64 lastused; 1749afaca05SMasahide NAKAMURA 1751da177e4SLinus Torvalds /* Reference to data common to all the instances of this 1761da177e4SLinus Torvalds * transformer. */ 1771da177e4SLinus Torvalds struct xfrm_type *type; 178b59f45d0SHerbert Xu struct xfrm_mode *mode; 1791da177e4SLinus Torvalds 180df71837dSTrent Jaeger /* Security context */ 181df71837dSTrent Jaeger struct xfrm_sec_ctx *security; 182df71837dSTrent Jaeger 1831da177e4SLinus Torvalds /* Private data of this transformer, format is opaque, 1841da177e4SLinus Torvalds * interpreted by xfrm_type methods. */ 1851da177e4SLinus Torvalds void *data; 1861da177e4SLinus Torvalds }; 1871da177e4SLinus Torvalds 1882717096aSJamal Hadi Salim /* xflags - make enum if more show up */ 1892717096aSJamal Hadi Salim #define XFRM_TIME_DEFER 1 1902717096aSJamal Hadi Salim 1911da177e4SLinus Torvalds enum { 1921da177e4SLinus Torvalds XFRM_STATE_VOID, 1931da177e4SLinus Torvalds XFRM_STATE_ACQ, 1941da177e4SLinus Torvalds XFRM_STATE_VALID, 1951da177e4SLinus Torvalds XFRM_STATE_ERROR, 1961da177e4SLinus Torvalds XFRM_STATE_EXPIRED, 1971da177e4SLinus Torvalds XFRM_STATE_DEAD 1981da177e4SLinus Torvalds }; 1991da177e4SLinus Torvalds 20026b15dadSJamal Hadi Salim /* callback structure passed from either netlink or pfkey */ 20126b15dadSJamal Hadi Salim struct km_event 20226b15dadSJamal Hadi Salim { 203bf08867fSHerbert Xu union { 204bf08867fSHerbert Xu u32 hard; 205bf08867fSHerbert Xu u32 proto; 206bf08867fSHerbert Xu u32 byid; 207f8cd5488SJamal Hadi Salim u32 aevent; 208f7b6983fSMasahide NAKAMURA u32 type; 209bf08867fSHerbert Xu } data; 210bf08867fSHerbert Xu 21126b15dadSJamal Hadi Salim u32 seq; 21226b15dadSJamal Hadi Salim u32 pid; 21326b15dadSJamal Hadi Salim u32 event; 21426b15dadSJamal Hadi Salim }; 21526b15dadSJamal Hadi Salim 2161da177e4SLinus Torvalds struct xfrm_type; 2171da177e4SLinus Torvalds struct xfrm_dst; 2181da177e4SLinus Torvalds struct xfrm_policy_afinfo { 2191da177e4SLinus Torvalds unsigned short family; 22073654d61SHerbert Xu struct xfrm_type *type_map[IPPROTO_MAX]; 221b59f45d0SHerbert Xu struct xfrm_mode *mode_map[XFRM_MODE_MAX]; 2221da177e4SLinus Torvalds struct dst_ops *dst_ops; 2231da177e4SLinus Torvalds void (*garbage_collect)(void); 2241da177e4SLinus Torvalds int (*dst_lookup)(struct xfrm_dst **dst, struct flowi *fl); 225a1e59abfSPatrick McHardy int (*get_saddr)(xfrm_address_t *saddr, xfrm_address_t *daddr); 2261da177e4SLinus Torvalds struct dst_entry *(*find_bundle)(struct flowi *fl, struct xfrm_policy *policy); 2271da177e4SLinus Torvalds int (*bundle_create)(struct xfrm_policy *policy, 2281da177e4SLinus Torvalds struct xfrm_state **xfrm, 2291da177e4SLinus Torvalds int nx, 2301da177e4SLinus Torvalds struct flowi *fl, 2311da177e4SLinus Torvalds struct dst_entry **dst_p); 2321da177e4SLinus Torvalds void (*decode_session)(struct sk_buff *skb, 2331da177e4SLinus Torvalds struct flowi *fl); 2341da177e4SLinus Torvalds }; 2351da177e4SLinus Torvalds 2361da177e4SLinus Torvalds extern int xfrm_policy_register_afinfo(struct xfrm_policy_afinfo *afinfo); 2371da177e4SLinus Torvalds extern int xfrm_policy_unregister_afinfo(struct xfrm_policy_afinfo *afinfo); 23826b15dadSJamal Hadi Salim extern void km_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c); 23926b15dadSJamal Hadi Salim extern void km_state_notify(struct xfrm_state *x, struct km_event *c); 2401da177e4SLinus Torvalds #define XFRM_ACQ_EXPIRES 30 2411da177e4SLinus Torvalds 2421da177e4SLinus Torvalds struct xfrm_tmpl; 243980ebd25SJamal Hadi Salim extern int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol); 24453bc6b4dSJamal Hadi Salim extern void km_state_expired(struct xfrm_state *x, int hard, u32 pid); 24553bc6b4dSJamal Hadi Salim extern int __xfrm_state_delete(struct xfrm_state *x); 24653bc6b4dSJamal Hadi Salim 2471da177e4SLinus Torvalds struct xfrm_state_afinfo { 2481da177e4SLinus Torvalds unsigned short family; 249d094cd83SHerbert Xu int (*init_flags)(struct xfrm_state *x); 2501da177e4SLinus Torvalds void (*init_tempsel)(struct xfrm_state *x, struct flowi *fl, 2511da177e4SLinus Torvalds struct xfrm_tmpl *tmpl, 2521da177e4SLinus Torvalds xfrm_address_t *daddr, xfrm_address_t *saddr); 25341a49cc3SMasahide NAKAMURA int (*tmpl_sort)(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n); 25441a49cc3SMasahide NAKAMURA int (*state_sort)(struct xfrm_state **dst, struct xfrm_state **src, int n); 255cdca7265SMiika Komu int (*output)(struct sk_buff *skb); 2561da177e4SLinus Torvalds }; 2571da177e4SLinus Torvalds 2581da177e4SLinus Torvalds extern int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo); 2591da177e4SLinus Torvalds extern int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo); 260cdca7265SMiika Komu extern struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned short family); 261cdca7265SMiika Komu extern void xfrm_state_put_afinfo(struct xfrm_state_afinfo *afinfo); 2621da177e4SLinus Torvalds 2631da177e4SLinus Torvalds extern void xfrm_state_delete_tunnel(struct xfrm_state *x); 2641da177e4SLinus Torvalds 2651da177e4SLinus Torvalds struct xfrm_type 2661da177e4SLinus Torvalds { 2671da177e4SLinus Torvalds char *description; 2681da177e4SLinus Torvalds struct module *owner; 2691da177e4SLinus Torvalds __u8 proto; 2701b5c2299SMasahide NAKAMURA __u8 flags; 2711b5c2299SMasahide NAKAMURA #define XFRM_TYPE_NON_FRAGMENT 1 2721da177e4SLinus Torvalds 27372cb6962SHerbert Xu int (*init_state)(struct xfrm_state *x); 2741da177e4SLinus Torvalds void (*destructor)(struct xfrm_state *); 275e695633eSHerbert Xu int (*input)(struct xfrm_state *, struct sk_buff *skb); 2761da177e4SLinus Torvalds int (*output)(struct xfrm_state *, struct sk_buff *pskb); 277df0ba92aSMasahide NAKAMURA int (*reject)(struct xfrm_state *, struct sk_buff *, struct flowi *); 278aee5adb4SMasahide NAKAMURA int (*hdr_offset)(struct xfrm_state *, struct sk_buff *, u8 **); 27999505a84SMasahide NAKAMURA xfrm_address_t *(*local_addr)(struct xfrm_state *, xfrm_address_t *); 28099505a84SMasahide NAKAMURA xfrm_address_t *(*remote_addr)(struct xfrm_state *, xfrm_address_t *); 2811da177e4SLinus Torvalds /* Estimate maximal size of result of transformation of a dgram */ 282c5c25238SPatrick McHardy u32 (*get_mtu)(struct xfrm_state *, int size); 2831da177e4SLinus Torvalds }; 2841da177e4SLinus Torvalds 2851da177e4SLinus Torvalds extern int xfrm_register_type(struct xfrm_type *type, unsigned short family); 2861da177e4SLinus Torvalds extern int xfrm_unregister_type(struct xfrm_type *type, unsigned short family); 2871da177e4SLinus Torvalds extern struct xfrm_type *xfrm_get_type(u8 proto, unsigned short family); 2881da177e4SLinus Torvalds extern void xfrm_put_type(struct xfrm_type *type); 2891da177e4SLinus Torvalds 290b59f45d0SHerbert Xu struct xfrm_mode { 291b59f45d0SHerbert Xu int (*input)(struct xfrm_state *x, struct sk_buff *skb); 292eb878e84SJamal Hadi Salim int (*output)(struct xfrm_state *x,struct sk_buff *skb); 293b59f45d0SHerbert Xu 294b59f45d0SHerbert Xu struct module *owner; 295b59f45d0SHerbert Xu unsigned int encap; 296b59f45d0SHerbert Xu }; 297b59f45d0SHerbert Xu 298b59f45d0SHerbert Xu extern int xfrm_register_mode(struct xfrm_mode *mode, int family); 299b59f45d0SHerbert Xu extern int xfrm_unregister_mode(struct xfrm_mode *mode, int family); 300b59f45d0SHerbert Xu extern struct xfrm_mode *xfrm_get_mode(unsigned int encap, int family); 301b59f45d0SHerbert Xu extern void xfrm_put_mode(struct xfrm_mode *mode); 302b59f45d0SHerbert Xu 3031da177e4SLinus Torvalds struct xfrm_tmpl 3041da177e4SLinus Torvalds { 3051da177e4SLinus Torvalds /* id in template is interpreted as: 3061da177e4SLinus Torvalds * daddr - destination of tunnel, may be zero for transport mode. 3071da177e4SLinus Torvalds * spi - zero to acquire spi. Not zero if spi is static, then 3081da177e4SLinus Torvalds * daddr must be fixed too. 3091da177e4SLinus Torvalds * proto - AH/ESP/IPCOMP 3101da177e4SLinus Torvalds */ 3111da177e4SLinus Torvalds struct xfrm_id id; 3121da177e4SLinus Torvalds 3131da177e4SLinus Torvalds /* Source address of tunnel. Ignored, if it is not a tunnel. */ 3141da177e4SLinus Torvalds xfrm_address_t saddr; 3151da177e4SLinus Torvalds 31676b3f055SMiika Komu unsigned short encap_family; 31776b3f055SMiika Komu 3181da177e4SLinus Torvalds __u32 reqid; 3191da177e4SLinus Torvalds 3207e49e6deSMasahide NAKAMURA /* Mode: transport, tunnel etc. */ 3211da177e4SLinus Torvalds __u8 mode; 3221da177e4SLinus Torvalds 3231da177e4SLinus Torvalds /* Sharing mode: unique, this session only, this user only etc. */ 3241da177e4SLinus Torvalds __u8 share; 3251da177e4SLinus Torvalds 3261da177e4SLinus Torvalds /* May skip this transfomration if no SA is found */ 3271da177e4SLinus Torvalds __u8 optional; 3281da177e4SLinus Torvalds 3291da177e4SLinus Torvalds /* Bit mask of algos allowed for acquisition */ 3301da177e4SLinus Torvalds __u32 aalgos; 3311da177e4SLinus Torvalds __u32 ealgos; 3321da177e4SLinus Torvalds __u32 calgos; 3331da177e4SLinus Torvalds }; 3341da177e4SLinus Torvalds 335622dc828SMasahide NAKAMURA #define XFRM_MAX_DEPTH 6 3361da177e4SLinus Torvalds 3371da177e4SLinus Torvalds struct xfrm_policy 3381da177e4SLinus Torvalds { 3391da177e4SLinus Torvalds struct xfrm_policy *next; 3402518c7c2SDavid S. Miller struct hlist_node bydst; 3412518c7c2SDavid S. Miller struct hlist_node byidx; 3421da177e4SLinus Torvalds 3431da177e4SLinus Torvalds /* This lock only affects elements except for entry. */ 3441da177e4SLinus Torvalds rwlock_t lock; 3451da177e4SLinus Torvalds atomic_t refcnt; 3461da177e4SLinus Torvalds struct timer_list timer; 3471da177e4SLinus Torvalds 3481da177e4SLinus Torvalds u32 priority; 3491da177e4SLinus Torvalds u32 index; 3501da177e4SLinus Torvalds struct xfrm_selector selector; 3511da177e4SLinus Torvalds struct xfrm_lifetime_cfg lft; 3521da177e4SLinus Torvalds struct xfrm_lifetime_cur curlft; 3531da177e4SLinus Torvalds struct dst_entry *bundles; 35446ca5f5dSArnaldo Carvalho de Melo u16 family; 35546ca5f5dSArnaldo Carvalho de Melo u8 type; 35646ca5f5dSArnaldo Carvalho de Melo u8 action; 35746ca5f5dSArnaldo Carvalho de Melo u8 flags; 35846ca5f5dSArnaldo Carvalho de Melo u8 dead; 35946ca5f5dSArnaldo Carvalho de Melo u8 xfrm_nr; 36046ca5f5dSArnaldo Carvalho de Melo /* XXX 1 byte hole, try to pack */ 361df71837dSTrent Jaeger struct xfrm_sec_ctx *security; 3621da177e4SLinus Torvalds struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH]; 3631da177e4SLinus Torvalds }; 3641da177e4SLinus Torvalds 36580c9abaaSShinta Sugimoto struct xfrm_migrate { 36680c9abaaSShinta Sugimoto xfrm_address_t old_daddr; 36780c9abaaSShinta Sugimoto xfrm_address_t old_saddr; 36880c9abaaSShinta Sugimoto xfrm_address_t new_daddr; 36980c9abaaSShinta Sugimoto xfrm_address_t new_saddr; 37080c9abaaSShinta Sugimoto u8 proto; 37180c9abaaSShinta Sugimoto u8 mode; 37280c9abaaSShinta Sugimoto u16 reserved; 37380c9abaaSShinta Sugimoto u32 reqid; 37480c9abaaSShinta Sugimoto u16 old_family; 37580c9abaaSShinta Sugimoto u16 new_family; 37680c9abaaSShinta Sugimoto }; 37780c9abaaSShinta Sugimoto 3781da177e4SLinus Torvalds #define XFRM_KM_TIMEOUT 30 379f8cd5488SJamal Hadi Salim /* which seqno */ 380f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_SEQ 1 381f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_OSEQ 2 382f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_SEQ_MASK 3 383f8cd5488SJamal Hadi Salim /* what happened */ 384f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_UPDATE XFRM_AE_CR 385f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_TIMEOUT XFRM_AE_CE 386f8cd5488SJamal Hadi Salim 387f8cd5488SJamal Hadi Salim /* default aevent timeout in units of 100ms */ 388f8cd5488SJamal Hadi Salim #define XFRM_AE_ETIME 10 389f8cd5488SJamal Hadi Salim /* Async Event timer multiplier */ 390f8cd5488SJamal Hadi Salim #define XFRM_AE_ETH_M 10 391f8cd5488SJamal Hadi Salim /* default seq threshold size */ 392f8cd5488SJamal Hadi Salim #define XFRM_AE_SEQT_SIZE 2 3931da177e4SLinus Torvalds 3941da177e4SLinus Torvalds struct xfrm_mgr 3951da177e4SLinus Torvalds { 3961da177e4SLinus Torvalds struct list_head list; 3971da177e4SLinus Torvalds char *id; 39826b15dadSJamal Hadi Salim int (*notify)(struct xfrm_state *x, struct km_event *c); 3991da177e4SLinus Torvalds int (*acquire)(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *xp, int dir); 400cb969f07SVenkat Yekkirala struct xfrm_policy *(*compile_policy)(struct sock *sk, int opt, u8 *data, int len, int *dir); 4015d36b180SAl Viro int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); 40226b15dadSJamal Hadi Salim int (*notify_policy)(struct xfrm_policy *x, int dir, struct km_event *c); 40397a64b45SMasahide NAKAMURA int (*report)(u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr); 40480c9abaaSShinta Sugimoto int (*migrate)(struct xfrm_selector *sel, u8 dir, u8 type, struct xfrm_migrate *m, int num_bundles); 4051da177e4SLinus Torvalds }; 4061da177e4SLinus Torvalds 4071da177e4SLinus Torvalds extern int xfrm_register_km(struct xfrm_mgr *km); 4081da177e4SLinus Torvalds extern int xfrm_unregister_km(struct xfrm_mgr *km); 4091da177e4SLinus Torvalds 4102518c7c2SDavid S. Miller extern unsigned int xfrm_policy_count[XFRM_POLICY_MAX*2]; 4111da177e4SLinus Torvalds 412161a09e7SJoy Latten /* Audit Information */ 413161a09e7SJoy Latten struct xfrm_audit 414161a09e7SJoy Latten { 415161a09e7SJoy Latten uid_t loginuid; 416161a09e7SJoy Latten u32 secid; 417161a09e7SJoy Latten }; 418c9204d9cSJoy Latten 419ecfd6b18SJamal Hadi Salim struct xfrm_spdinfo 420ecfd6b18SJamal Hadi Salim { 421ecfd6b18SJamal Hadi Salim u32 incnt; 422ecfd6b18SJamal Hadi Salim u32 outcnt; 423ecfd6b18SJamal Hadi Salim u32 fwdcnt; 424ecfd6b18SJamal Hadi Salim u32 inscnt; 425ecfd6b18SJamal Hadi Salim u32 outscnt; 426ecfd6b18SJamal Hadi Salim u32 fwdscnt; 427ecfd6b18SJamal Hadi Salim u32 spdhcnt; 428ecfd6b18SJamal Hadi Salim u32 spdhmcnt; 429ecfd6b18SJamal Hadi Salim }; 430c9204d9cSJoy Latten #ifdef CONFIG_AUDITSYSCALL 431c9204d9cSJoy Latten extern void xfrm_audit_log(uid_t auid, u32 secid, int type, int result, 432161a09e7SJoy Latten struct xfrm_policy *xp, struct xfrm_state *x); 433c9204d9cSJoy Latten #else 434c9204d9cSJoy Latten #define xfrm_audit_log(a,s,t,r,p,x) do { ; } while (0) 435c9204d9cSJoy Latten #endif /* CONFIG_AUDITSYSCALL */ 436161a09e7SJoy Latten 4371da177e4SLinus Torvalds static inline void xfrm_pol_hold(struct xfrm_policy *policy) 4381da177e4SLinus Torvalds { 4391da177e4SLinus Torvalds if (likely(policy != NULL)) 4401da177e4SLinus Torvalds atomic_inc(&policy->refcnt); 4411da177e4SLinus Torvalds } 4421da177e4SLinus Torvalds 4431da177e4SLinus Torvalds extern void __xfrm_policy_destroy(struct xfrm_policy *policy); 4441da177e4SLinus Torvalds 4451da177e4SLinus Torvalds static inline void xfrm_pol_put(struct xfrm_policy *policy) 4461da177e4SLinus Torvalds { 4471da177e4SLinus Torvalds if (atomic_dec_and_test(&policy->refcnt)) 4481da177e4SLinus Torvalds __xfrm_policy_destroy(policy); 4491da177e4SLinus Torvalds } 4501da177e4SLinus Torvalds 4514e81bb83SMasahide NAKAMURA #ifdef CONFIG_XFRM_SUB_POLICY 4524e81bb83SMasahide NAKAMURA static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols) 4534e81bb83SMasahide NAKAMURA { 4544e81bb83SMasahide NAKAMURA int i; 4554e81bb83SMasahide NAKAMURA for (i = npols - 1; i >= 0; --i) 4564e81bb83SMasahide NAKAMURA xfrm_pol_put(pols[i]); 4574e81bb83SMasahide NAKAMURA } 4584e81bb83SMasahide NAKAMURA #else 4594e81bb83SMasahide NAKAMURA static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols) 4604e81bb83SMasahide NAKAMURA { 4614e81bb83SMasahide NAKAMURA xfrm_pol_put(pols[0]); 4624e81bb83SMasahide NAKAMURA } 4634e81bb83SMasahide NAKAMURA #endif 4644e81bb83SMasahide NAKAMURA 4651da177e4SLinus Torvalds extern void __xfrm_state_destroy(struct xfrm_state *); 4661da177e4SLinus Torvalds 46721380b81SHerbert Xu static inline void __xfrm_state_put(struct xfrm_state *x) 46821380b81SHerbert Xu { 46921380b81SHerbert Xu atomic_dec(&x->refcnt); 47021380b81SHerbert Xu } 47121380b81SHerbert Xu 4721da177e4SLinus Torvalds static inline void xfrm_state_put(struct xfrm_state *x) 4731da177e4SLinus Torvalds { 4741da177e4SLinus Torvalds if (atomic_dec_and_test(&x->refcnt)) 4751da177e4SLinus Torvalds __xfrm_state_destroy(x); 4761da177e4SLinus Torvalds } 4771da177e4SLinus Torvalds 4781da177e4SLinus Torvalds static inline void xfrm_state_hold(struct xfrm_state *x) 4791da177e4SLinus Torvalds { 4801da177e4SLinus Torvalds atomic_inc(&x->refcnt); 4811da177e4SLinus Torvalds } 4821da177e4SLinus Torvalds 4831da177e4SLinus Torvalds static __inline__ int addr_match(void *token1, void *token2, int prefixlen) 4841da177e4SLinus Torvalds { 4855f19343fSAl Viro __be32 *a1 = token1; 4865f19343fSAl Viro __be32 *a2 = token2; 4871da177e4SLinus Torvalds int pdw; 4881da177e4SLinus Torvalds int pbi; 4891da177e4SLinus Torvalds 4901da177e4SLinus Torvalds pdw = prefixlen >> 5; /* num of whole __u32 in prefix */ 4911da177e4SLinus Torvalds pbi = prefixlen & 0x1f; /* num of bits in incomplete u32 in prefix */ 4921da177e4SLinus Torvalds 4931da177e4SLinus Torvalds if (pdw) 4941da177e4SLinus Torvalds if (memcmp(a1, a2, pdw << 2)) 4951da177e4SLinus Torvalds return 0; 4961da177e4SLinus Torvalds 4971da177e4SLinus Torvalds if (pbi) { 4985f19343fSAl Viro __be32 mask; 4991da177e4SLinus Torvalds 5001da177e4SLinus Torvalds mask = htonl((0xffffffff) << (32 - pbi)); 5011da177e4SLinus Torvalds 5021da177e4SLinus Torvalds if ((a1[pdw] ^ a2[pdw]) & mask) 5031da177e4SLinus Torvalds return 0; 5041da177e4SLinus Torvalds } 5051da177e4SLinus Torvalds 5061da177e4SLinus Torvalds return 1; 5071da177e4SLinus Torvalds } 5081da177e4SLinus Torvalds 5091da177e4SLinus Torvalds static __inline__ 510f9d07e41SAl Viro __be16 xfrm_flowi_sport(struct flowi *fl) 5111da177e4SLinus Torvalds { 512f9d07e41SAl Viro __be16 port; 5131da177e4SLinus Torvalds switch(fl->proto) { 5141da177e4SLinus Torvalds case IPPROTO_TCP: 5151da177e4SLinus Torvalds case IPPROTO_UDP: 516ba4e58ecSGerrit Renker case IPPROTO_UDPLITE: 5171da177e4SLinus Torvalds case IPPROTO_SCTP: 5181da177e4SLinus Torvalds port = fl->fl_ip_sport; 5191da177e4SLinus Torvalds break; 5201da177e4SLinus Torvalds case IPPROTO_ICMP: 5211da177e4SLinus Torvalds case IPPROTO_ICMPV6: 5221da177e4SLinus Torvalds port = htons(fl->fl_icmp_type); 5231da177e4SLinus Torvalds break; 5242ce4272aSMasahide NAKAMURA #ifdef CONFIG_IPV6_MIP6 5252ce4272aSMasahide NAKAMURA case IPPROTO_MH: 5262ce4272aSMasahide NAKAMURA port = htons(fl->fl_mh_type); 5272ce4272aSMasahide NAKAMURA break; 5282ce4272aSMasahide NAKAMURA #endif 5291da177e4SLinus Torvalds default: 5301da177e4SLinus Torvalds port = 0; /*XXX*/ 5311da177e4SLinus Torvalds } 5321da177e4SLinus Torvalds return port; 5331da177e4SLinus Torvalds } 5341da177e4SLinus Torvalds 5351da177e4SLinus Torvalds static __inline__ 536f9d07e41SAl Viro __be16 xfrm_flowi_dport(struct flowi *fl) 5371da177e4SLinus Torvalds { 538f9d07e41SAl Viro __be16 port; 5391da177e4SLinus Torvalds switch(fl->proto) { 5401da177e4SLinus Torvalds case IPPROTO_TCP: 5411da177e4SLinus Torvalds case IPPROTO_UDP: 542ba4e58ecSGerrit Renker case IPPROTO_UDPLITE: 5431da177e4SLinus Torvalds case IPPROTO_SCTP: 5441da177e4SLinus Torvalds port = fl->fl_ip_dport; 5451da177e4SLinus Torvalds break; 5461da177e4SLinus Torvalds case IPPROTO_ICMP: 5471da177e4SLinus Torvalds case IPPROTO_ICMPV6: 5481da177e4SLinus Torvalds port = htons(fl->fl_icmp_code); 5491da177e4SLinus Torvalds break; 5501da177e4SLinus Torvalds default: 5511da177e4SLinus Torvalds port = 0; /*XXX*/ 5521da177e4SLinus Torvalds } 5531da177e4SLinus Torvalds return port; 5541da177e4SLinus Torvalds } 5551da177e4SLinus Torvalds 55677681021SAndrew Morton extern int xfrm_selector_match(struct xfrm_selector *sel, struct flowi *fl, 55777681021SAndrew Morton unsigned short family); 5581da177e4SLinus Torvalds 559df71837dSTrent Jaeger #ifdef CONFIG_SECURITY_NETWORK_XFRM 560df71837dSTrent Jaeger /* If neither has a context --> match 561df71837dSTrent Jaeger * Otherwise, both must have a context and the sids, doi, alg must match 562df71837dSTrent Jaeger */ 563df71837dSTrent Jaeger static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) 564df71837dSTrent Jaeger { 565df71837dSTrent Jaeger return ((!s1 && !s2) || 566df71837dSTrent Jaeger (s1 && s2 && 567df71837dSTrent Jaeger (s1->ctx_sid == s2->ctx_sid) && 568df71837dSTrent Jaeger (s1->ctx_doi == s2->ctx_doi) && 569df71837dSTrent Jaeger (s1->ctx_alg == s2->ctx_alg))); 570df71837dSTrent Jaeger } 571df71837dSTrent Jaeger #else 572df71837dSTrent Jaeger static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) 573df71837dSTrent Jaeger { 574df71837dSTrent Jaeger return 1; 575df71837dSTrent Jaeger } 576df71837dSTrent Jaeger #endif 577df71837dSTrent Jaeger 5781da177e4SLinus Torvalds /* A struct encoding bundle of transformations to apply to some set of flow. 5791da177e4SLinus Torvalds * 5801da177e4SLinus Torvalds * dst->child points to the next element of bundle. 5811da177e4SLinus Torvalds * dst->xfrm points to an instanse of transformer. 5821da177e4SLinus Torvalds * 5831da177e4SLinus Torvalds * Due to unfortunate limitations of current routing cache, which we 5841da177e4SLinus Torvalds * have no time to fix, it mirrors struct rtable and bound to the same 5851da177e4SLinus Torvalds * routing key, including saddr,daddr. However, we can have many of 5861da177e4SLinus Torvalds * bundles differing by session id. All the bundles grow from a parent 5871da177e4SLinus Torvalds * policy rule. 5881da177e4SLinus Torvalds */ 5891da177e4SLinus Torvalds struct xfrm_dst 5901da177e4SLinus Torvalds { 5911da177e4SLinus Torvalds union { 5921da177e4SLinus Torvalds struct xfrm_dst *next; 5931da177e4SLinus Torvalds struct dst_entry dst; 5941da177e4SLinus Torvalds struct rtable rt; 5951da177e4SLinus Torvalds struct rt6_info rt6; 5961da177e4SLinus Torvalds } u; 5971da177e4SLinus Torvalds struct dst_entry *route; 598157bfc25SMasahide NAKAMURA #ifdef CONFIG_XFRM_SUB_POLICY 599157bfc25SMasahide NAKAMURA struct flowi *origin; 600157bfc25SMasahide NAKAMURA struct xfrm_selector *partner; 601157bfc25SMasahide NAKAMURA #endif 6029d4a706dSDavid S. Miller u32 genid; 6031da177e4SLinus Torvalds u32 route_mtu_cached; 6041da177e4SLinus Torvalds u32 child_mtu_cached; 60592d63decSHideaki YOSHIFUJI u32 route_cookie; 60692d63decSHideaki YOSHIFUJI u32 path_cookie; 6071da177e4SLinus Torvalds }; 6081da177e4SLinus Torvalds 609aabc9761SHerbert Xu static inline void xfrm_dst_destroy(struct xfrm_dst *xdst) 610aabc9761SHerbert Xu { 611aabc9761SHerbert Xu dst_release(xdst->route); 612aabc9761SHerbert Xu if (likely(xdst->u.dst.xfrm)) 613aabc9761SHerbert Xu xfrm_state_put(xdst->u.dst.xfrm); 614157bfc25SMasahide NAKAMURA #ifdef CONFIG_XFRM_SUB_POLICY 615157bfc25SMasahide NAKAMURA kfree(xdst->origin); 616157bfc25SMasahide NAKAMURA xdst->origin = NULL; 617157bfc25SMasahide NAKAMURA kfree(xdst->partner); 618157bfc25SMasahide NAKAMURA xdst->partner = NULL; 619157bfc25SMasahide NAKAMURA #endif 620aabc9761SHerbert Xu } 621aabc9761SHerbert Xu 622aabc9761SHerbert Xu extern void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev); 623aabc9761SHerbert Xu 6241da177e4SLinus Torvalds struct sec_path 6251da177e4SLinus Torvalds { 6261da177e4SLinus Torvalds atomic_t refcnt; 6271da177e4SLinus Torvalds int len; 628dbe5b4aaSHerbert Xu struct xfrm_state *xvec[XFRM_MAX_DEPTH]; 6291da177e4SLinus Torvalds }; 6301da177e4SLinus Torvalds 6311da177e4SLinus Torvalds static inline struct sec_path * 6321da177e4SLinus Torvalds secpath_get(struct sec_path *sp) 6331da177e4SLinus Torvalds { 6341da177e4SLinus Torvalds if (sp) 6351da177e4SLinus Torvalds atomic_inc(&sp->refcnt); 6361da177e4SLinus Torvalds return sp; 6371da177e4SLinus Torvalds } 6381da177e4SLinus Torvalds 6391da177e4SLinus Torvalds extern void __secpath_destroy(struct sec_path *sp); 6401da177e4SLinus Torvalds 6411da177e4SLinus Torvalds static inline void 6421da177e4SLinus Torvalds secpath_put(struct sec_path *sp) 6431da177e4SLinus Torvalds { 6441da177e4SLinus Torvalds if (sp && atomic_dec_and_test(&sp->refcnt)) 6451da177e4SLinus Torvalds __secpath_destroy(sp); 6461da177e4SLinus Torvalds } 6471da177e4SLinus Torvalds 6481da177e4SLinus Torvalds extern struct sec_path *secpath_dup(struct sec_path *src); 6491da177e4SLinus Torvalds 6501da177e4SLinus Torvalds static inline void 6511da177e4SLinus Torvalds secpath_reset(struct sk_buff *skb) 6521da177e4SLinus Torvalds { 6531da177e4SLinus Torvalds #ifdef CONFIG_XFRM 6541da177e4SLinus Torvalds secpath_put(skb->sp); 6551da177e4SLinus Torvalds skb->sp = NULL; 6561da177e4SLinus Torvalds #endif 6571da177e4SLinus Torvalds } 6581da177e4SLinus Torvalds 6591da177e4SLinus Torvalds static inline int 660a1e59abfSPatrick McHardy xfrm_addr_any(xfrm_address_t *addr, unsigned short family) 661a1e59abfSPatrick McHardy { 662a1e59abfSPatrick McHardy switch (family) { 663a1e59abfSPatrick McHardy case AF_INET: 664a1e59abfSPatrick McHardy return addr->a4 == 0; 665a1e59abfSPatrick McHardy case AF_INET6: 666a1e59abfSPatrick McHardy return ipv6_addr_any((struct in6_addr *)&addr->a6); 667a1e59abfSPatrick McHardy } 668a1e59abfSPatrick McHardy return 0; 669a1e59abfSPatrick McHardy } 670a1e59abfSPatrick McHardy 671a1e59abfSPatrick McHardy static inline int 6721da177e4SLinus Torvalds __xfrm4_state_addr_cmp(struct xfrm_tmpl *tmpl, struct xfrm_state *x) 6731da177e4SLinus Torvalds { 6741da177e4SLinus Torvalds return (tmpl->saddr.a4 && 6751da177e4SLinus Torvalds tmpl->saddr.a4 != x->props.saddr.a4); 6761da177e4SLinus Torvalds } 6771da177e4SLinus Torvalds 6781da177e4SLinus Torvalds static inline int 6791da177e4SLinus Torvalds __xfrm6_state_addr_cmp(struct xfrm_tmpl *tmpl, struct xfrm_state *x) 6801da177e4SLinus Torvalds { 6811da177e4SLinus Torvalds return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) && 6821da177e4SLinus Torvalds ipv6_addr_cmp((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr)); 6831da177e4SLinus Torvalds } 6841da177e4SLinus Torvalds 6851da177e4SLinus Torvalds static inline int 6861da177e4SLinus Torvalds xfrm_state_addr_cmp(struct xfrm_tmpl *tmpl, struct xfrm_state *x, unsigned short family) 6871da177e4SLinus Torvalds { 6881da177e4SLinus Torvalds switch (family) { 6891da177e4SLinus Torvalds case AF_INET: 6901da177e4SLinus Torvalds return __xfrm4_state_addr_cmp(tmpl, x); 6911da177e4SLinus Torvalds case AF_INET6: 6921da177e4SLinus Torvalds return __xfrm6_state_addr_cmp(tmpl, x); 6931da177e4SLinus Torvalds } 6941da177e4SLinus Torvalds return !0; 6951da177e4SLinus Torvalds } 6961da177e4SLinus Torvalds 6971da177e4SLinus Torvalds #ifdef CONFIG_XFRM 6981da177e4SLinus Torvalds 6991da177e4SLinus Torvalds extern int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb, unsigned short family); 7001da177e4SLinus Torvalds 7011da177e4SLinus Torvalds static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) 7021da177e4SLinus Torvalds { 7031da177e4SLinus Torvalds if (sk && sk->sk_policy[XFRM_POLICY_IN]) 7041da177e4SLinus Torvalds return __xfrm_policy_check(sk, dir, skb, family); 7051da177e4SLinus Torvalds 7062518c7c2SDavid S. Miller return (!xfrm_policy_count[dir] && !skb->sp) || 7071da177e4SLinus Torvalds (skb->dst->flags & DST_NOPOLICY) || 7081da177e4SLinus Torvalds __xfrm_policy_check(sk, dir, skb, family); 7091da177e4SLinus Torvalds } 7101da177e4SLinus Torvalds 7111da177e4SLinus Torvalds static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 7121da177e4SLinus Torvalds { 7131da177e4SLinus Torvalds return xfrm_policy_check(sk, dir, skb, AF_INET); 7141da177e4SLinus Torvalds } 7151da177e4SLinus Torvalds 7161da177e4SLinus Torvalds static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 7171da177e4SLinus Torvalds { 7181da177e4SLinus Torvalds return xfrm_policy_check(sk, dir, skb, AF_INET6); 7191da177e4SLinus Torvalds } 7201da177e4SLinus Torvalds 7213e3850e9SPatrick McHardy extern int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, unsigned short family); 7221da177e4SLinus Torvalds extern int __xfrm_route_forward(struct sk_buff *skb, unsigned short family); 7231da177e4SLinus Torvalds 7241da177e4SLinus Torvalds static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family) 7251da177e4SLinus Torvalds { 7262518c7c2SDavid S. Miller return !xfrm_policy_count[XFRM_POLICY_OUT] || 7271da177e4SLinus Torvalds (skb->dst->flags & DST_NOXFRM) || 7281da177e4SLinus Torvalds __xfrm_route_forward(skb, family); 7291da177e4SLinus Torvalds } 7301da177e4SLinus Torvalds 7311da177e4SLinus Torvalds static inline int xfrm4_route_forward(struct sk_buff *skb) 7321da177e4SLinus Torvalds { 7331da177e4SLinus Torvalds return xfrm_route_forward(skb, AF_INET); 7341da177e4SLinus Torvalds } 7351da177e4SLinus Torvalds 7361da177e4SLinus Torvalds static inline int xfrm6_route_forward(struct sk_buff *skb) 7371da177e4SLinus Torvalds { 7381da177e4SLinus Torvalds return xfrm_route_forward(skb, AF_INET6); 7391da177e4SLinus Torvalds } 7401da177e4SLinus Torvalds 7411da177e4SLinus Torvalds extern int __xfrm_sk_clone_policy(struct sock *sk); 7421da177e4SLinus Torvalds 7431da177e4SLinus Torvalds static inline int xfrm_sk_clone_policy(struct sock *sk) 7441da177e4SLinus Torvalds { 7451da177e4SLinus Torvalds if (unlikely(sk->sk_policy[0] || sk->sk_policy[1])) 7461da177e4SLinus Torvalds return __xfrm_sk_clone_policy(sk); 7471da177e4SLinus Torvalds return 0; 7481da177e4SLinus Torvalds } 7491da177e4SLinus Torvalds 7504666faabSHerbert Xu extern int xfrm_policy_delete(struct xfrm_policy *pol, int dir); 7511da177e4SLinus Torvalds 7521da177e4SLinus Torvalds static inline void xfrm_sk_free_policy(struct sock *sk) 7531da177e4SLinus Torvalds { 7541da177e4SLinus Torvalds if (unlikely(sk->sk_policy[0] != NULL)) { 7551da177e4SLinus Torvalds xfrm_policy_delete(sk->sk_policy[0], XFRM_POLICY_MAX); 7561da177e4SLinus Torvalds sk->sk_policy[0] = NULL; 7571da177e4SLinus Torvalds } 7581da177e4SLinus Torvalds if (unlikely(sk->sk_policy[1] != NULL)) { 7591da177e4SLinus Torvalds xfrm_policy_delete(sk->sk_policy[1], XFRM_POLICY_MAX+1); 7601da177e4SLinus Torvalds sk->sk_policy[1] = NULL; 7611da177e4SLinus Torvalds } 7621da177e4SLinus Torvalds } 7631da177e4SLinus Torvalds 7641da177e4SLinus Torvalds #else 7651da177e4SLinus Torvalds 7661da177e4SLinus Torvalds static inline void xfrm_sk_free_policy(struct sock *sk) {} 7671da177e4SLinus Torvalds static inline int xfrm_sk_clone_policy(struct sock *sk) { return 0; } 7681da177e4SLinus Torvalds static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; } 7691da177e4SLinus Torvalds static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; } 7701da177e4SLinus Torvalds static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 7711da177e4SLinus Torvalds { 7721da177e4SLinus Torvalds return 1; 7731da177e4SLinus Torvalds } 7741da177e4SLinus Torvalds static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 7751da177e4SLinus Torvalds { 7761da177e4SLinus Torvalds return 1; 7771da177e4SLinus Torvalds } 7781da177e4SLinus Torvalds static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) 7791da177e4SLinus Torvalds { 7801da177e4SLinus Torvalds return 1; 7811da177e4SLinus Torvalds } 7821da177e4SLinus Torvalds #endif 7831da177e4SLinus Torvalds 7841da177e4SLinus Torvalds static __inline__ 7851da177e4SLinus Torvalds xfrm_address_t *xfrm_flowi_daddr(struct flowi *fl, unsigned short family) 7861da177e4SLinus Torvalds { 7871da177e4SLinus Torvalds switch (family){ 7881da177e4SLinus Torvalds case AF_INET: 7891da177e4SLinus Torvalds return (xfrm_address_t *)&fl->fl4_dst; 7901da177e4SLinus Torvalds case AF_INET6: 7911da177e4SLinus Torvalds return (xfrm_address_t *)&fl->fl6_dst; 7921da177e4SLinus Torvalds } 7931da177e4SLinus Torvalds return NULL; 7941da177e4SLinus Torvalds } 7951da177e4SLinus Torvalds 7961da177e4SLinus Torvalds static __inline__ 7971da177e4SLinus Torvalds xfrm_address_t *xfrm_flowi_saddr(struct flowi *fl, unsigned short family) 7981da177e4SLinus Torvalds { 7991da177e4SLinus Torvalds switch (family){ 8001da177e4SLinus Torvalds case AF_INET: 8011da177e4SLinus Torvalds return (xfrm_address_t *)&fl->fl4_src; 8021da177e4SLinus Torvalds case AF_INET6: 8031da177e4SLinus Torvalds return (xfrm_address_t *)&fl->fl6_src; 8041da177e4SLinus Torvalds } 8051da177e4SLinus Torvalds return NULL; 8061da177e4SLinus Torvalds } 8071da177e4SLinus Torvalds 8081da177e4SLinus Torvalds static __inline__ int 8091da177e4SLinus Torvalds __xfrm4_state_addr_check(struct xfrm_state *x, 8101da177e4SLinus Torvalds xfrm_address_t *daddr, xfrm_address_t *saddr) 8111da177e4SLinus Torvalds { 8121da177e4SLinus Torvalds if (daddr->a4 == x->id.daddr.a4 && 8131da177e4SLinus Torvalds (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4)) 8141da177e4SLinus Torvalds return 1; 8151da177e4SLinus Torvalds return 0; 8161da177e4SLinus Torvalds } 8171da177e4SLinus Torvalds 8181da177e4SLinus Torvalds static __inline__ int 8191da177e4SLinus Torvalds __xfrm6_state_addr_check(struct xfrm_state *x, 8201da177e4SLinus Torvalds xfrm_address_t *daddr, xfrm_address_t *saddr) 8211da177e4SLinus Torvalds { 8221da177e4SLinus Torvalds if (!ipv6_addr_cmp((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) && 8231da177e4SLinus Torvalds (!ipv6_addr_cmp((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr)|| 8241da177e4SLinus Torvalds ipv6_addr_any((struct in6_addr *)saddr) || 8251da177e4SLinus Torvalds ipv6_addr_any((struct in6_addr *)&x->props.saddr))) 8261da177e4SLinus Torvalds return 1; 8271da177e4SLinus Torvalds return 0; 8281da177e4SLinus Torvalds } 8291da177e4SLinus Torvalds 8301da177e4SLinus Torvalds static __inline__ int 8311da177e4SLinus Torvalds xfrm_state_addr_check(struct xfrm_state *x, 8321da177e4SLinus Torvalds xfrm_address_t *daddr, xfrm_address_t *saddr, 8331da177e4SLinus Torvalds unsigned short family) 8341da177e4SLinus Torvalds { 8351da177e4SLinus Torvalds switch (family) { 8361da177e4SLinus Torvalds case AF_INET: 8371da177e4SLinus Torvalds return __xfrm4_state_addr_check(x, daddr, saddr); 8381da177e4SLinus Torvalds case AF_INET6: 8391da177e4SLinus Torvalds return __xfrm6_state_addr_check(x, daddr, saddr); 8401da177e4SLinus Torvalds } 8411da177e4SLinus Torvalds return 0; 8421da177e4SLinus Torvalds } 8431da177e4SLinus Torvalds 844e53820deSMasahide NAKAMURA static __inline__ int 845e53820deSMasahide NAKAMURA xfrm_state_addr_flow_check(struct xfrm_state *x, struct flowi *fl, 846e53820deSMasahide NAKAMURA unsigned short family) 847e53820deSMasahide NAKAMURA { 848e53820deSMasahide NAKAMURA switch (family) { 849e53820deSMasahide NAKAMURA case AF_INET: 850e53820deSMasahide NAKAMURA return __xfrm4_state_addr_check(x, 851e53820deSMasahide NAKAMURA (xfrm_address_t *)&fl->fl4_dst, 852e53820deSMasahide NAKAMURA (xfrm_address_t *)&fl->fl4_src); 853e53820deSMasahide NAKAMURA case AF_INET6: 854e53820deSMasahide NAKAMURA return __xfrm6_state_addr_check(x, 855e53820deSMasahide NAKAMURA (xfrm_address_t *)&fl->fl6_dst, 856e53820deSMasahide NAKAMURA (xfrm_address_t *)&fl->fl6_src); 857e53820deSMasahide NAKAMURA } 858e53820deSMasahide NAKAMURA return 0; 859e53820deSMasahide NAKAMURA } 860e53820deSMasahide NAKAMURA 8611da177e4SLinus Torvalds static inline int xfrm_state_kern(struct xfrm_state *x) 8621da177e4SLinus Torvalds { 8631da177e4SLinus Torvalds return atomic_read(&x->tunnel_users); 8641da177e4SLinus Torvalds } 8651da177e4SLinus Torvalds 8665794708fSMasahide NAKAMURA static inline int xfrm_id_proto_match(u8 proto, u8 userproto) 8675794708fSMasahide NAKAMURA { 868dc00a525SMasahide NAKAMURA return (!userproto || proto == userproto || 869dc00a525SMasahide NAKAMURA (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH || 870dc00a525SMasahide NAKAMURA proto == IPPROTO_ESP || 871dc00a525SMasahide NAKAMURA proto == IPPROTO_COMP))); 8725794708fSMasahide NAKAMURA } 8735794708fSMasahide NAKAMURA 8741da177e4SLinus Torvalds /* 8751da177e4SLinus Torvalds * xfrm algorithm information 8761da177e4SLinus Torvalds */ 8771da177e4SLinus Torvalds struct xfrm_algo_auth_info { 8781da177e4SLinus Torvalds u16 icv_truncbits; 8791da177e4SLinus Torvalds u16 icv_fullbits; 8801da177e4SLinus Torvalds }; 8811da177e4SLinus Torvalds 8821da177e4SLinus Torvalds struct xfrm_algo_encr_info { 8831da177e4SLinus Torvalds u16 blockbits; 8841da177e4SLinus Torvalds u16 defkeybits; 8851da177e4SLinus Torvalds }; 8861da177e4SLinus Torvalds 8871da177e4SLinus Torvalds struct xfrm_algo_comp_info { 8881da177e4SLinus Torvalds u16 threshold; 8891da177e4SLinus Torvalds }; 8901da177e4SLinus Torvalds 8911da177e4SLinus Torvalds struct xfrm_algo_desc { 8921da177e4SLinus Torvalds char *name; 89304ff1260SHerbert Xu char *compat; 8941da177e4SLinus Torvalds u8 available:1; 8951da177e4SLinus Torvalds union { 8961da177e4SLinus Torvalds struct xfrm_algo_auth_info auth; 8971da177e4SLinus Torvalds struct xfrm_algo_encr_info encr; 8981da177e4SLinus Torvalds struct xfrm_algo_comp_info comp; 8991da177e4SLinus Torvalds } uinfo; 9001da177e4SLinus Torvalds struct sadb_alg desc; 9011da177e4SLinus Torvalds }; 9021da177e4SLinus Torvalds 9031da177e4SLinus Torvalds /* XFRM tunnel handlers. */ 9041da177e4SLinus Torvalds struct xfrm_tunnel { 9051da177e4SLinus Torvalds int (*handler)(struct sk_buff *skb); 906d2acc347SHerbert Xu int (*err_handler)(struct sk_buff *skb, __u32 info); 907d2acc347SHerbert Xu 908d2acc347SHerbert Xu struct xfrm_tunnel *next; 909d2acc347SHerbert Xu int priority; 9101da177e4SLinus Torvalds }; 9111da177e4SLinus Torvalds 9121da177e4SLinus Torvalds struct xfrm6_tunnel { 913d2acc347SHerbert Xu int (*handler)(struct sk_buff *skb); 914d2acc347SHerbert Xu int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt, 91504ce6909SAl Viro int type, int code, int offset, __be32 info); 916d2acc347SHerbert Xu struct xfrm6_tunnel *next; 917d2acc347SHerbert Xu int priority; 9181da177e4SLinus Torvalds }; 9191da177e4SLinus Torvalds 9201da177e4SLinus Torvalds extern void xfrm_init(void); 9211da177e4SLinus Torvalds extern void xfrm4_init(void); 9221da177e4SLinus Torvalds extern void xfrm6_init(void); 9231da177e4SLinus Torvalds extern void xfrm6_fini(void); 9241da177e4SLinus Torvalds extern void xfrm_state_init(void); 9251da177e4SLinus Torvalds extern void xfrm4_state_init(void); 9261da177e4SLinus Torvalds extern void xfrm6_state_init(void); 9271da177e4SLinus Torvalds extern void xfrm6_state_fini(void); 9281da177e4SLinus Torvalds 9291da177e4SLinus Torvalds extern int xfrm_state_walk(u8 proto, int (*func)(struct xfrm_state *, int, void*), void *); 9301da177e4SLinus Torvalds extern struct xfrm_state *xfrm_state_alloc(void); 9311da177e4SLinus Torvalds extern struct xfrm_state *xfrm_state_find(xfrm_address_t *daddr, xfrm_address_t *saddr, 9321da177e4SLinus Torvalds struct flowi *fl, struct xfrm_tmpl *tmpl, 9331da177e4SLinus Torvalds struct xfrm_policy *pol, int *err, 9341da177e4SLinus Torvalds unsigned short family); 9351da177e4SLinus Torvalds extern int xfrm_state_check_expire(struct xfrm_state *x); 9361da177e4SLinus Torvalds extern void xfrm_state_insert(struct xfrm_state *x); 9371da177e4SLinus Torvalds extern int xfrm_state_add(struct xfrm_state *x); 9381da177e4SLinus Torvalds extern int xfrm_state_update(struct xfrm_state *x); 939a94cfd19SAl Viro extern struct xfrm_state *xfrm_state_lookup(xfrm_address_t *daddr, __be32 spi, u8 proto, unsigned short family); 940eb2971b6SMasahide NAKAMURA extern struct xfrm_state *xfrm_state_lookup_byaddr(xfrm_address_t *daddr, xfrm_address_t *saddr, u8 proto, unsigned short family); 94141a49cc3SMasahide NAKAMURA #ifdef CONFIG_XFRM_SUB_POLICY 94241a49cc3SMasahide NAKAMURA extern int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, 94341a49cc3SMasahide NAKAMURA int n, unsigned short family); 94441a49cc3SMasahide NAKAMURA extern int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, 94541a49cc3SMasahide NAKAMURA int n, unsigned short family); 94641a49cc3SMasahide NAKAMURA #else 94741a49cc3SMasahide NAKAMURA static inline int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, 94841a49cc3SMasahide NAKAMURA int n, unsigned short family) 94941a49cc3SMasahide NAKAMURA { 95041a49cc3SMasahide NAKAMURA return -ENOSYS; 95141a49cc3SMasahide NAKAMURA } 95241a49cc3SMasahide NAKAMURA 95341a49cc3SMasahide NAKAMURA static inline int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, 95441a49cc3SMasahide NAKAMURA int n, unsigned short family) 95541a49cc3SMasahide NAKAMURA { 95641a49cc3SMasahide NAKAMURA return -ENOSYS; 95741a49cc3SMasahide NAKAMURA } 95841a49cc3SMasahide NAKAMURA #endif 959af11e316SJamal Hadi Salim 960af11e316SJamal Hadi Salim struct xfrmk_sadinfo { 961af11e316SJamal Hadi Salim u32 sadhcnt; /* current hash bkts */ 962af11e316SJamal Hadi Salim u32 sadhmcnt; /* max allowed hash bkts */ 963af11e316SJamal Hadi Salim u32 sadcnt; /* current running count */ 964af11e316SJamal Hadi Salim }; 965af11e316SJamal Hadi Salim 9661da177e4SLinus Torvalds extern struct xfrm_state *xfrm_find_acq_byseq(u32 seq); 96726b15dadSJamal Hadi Salim extern int xfrm_state_delete(struct xfrm_state *x); 968161a09e7SJoy Latten extern void xfrm_state_flush(u8 proto, struct xfrm_audit *audit_info); 969af11e316SJamal Hadi Salim extern void xfrm_sad_getinfo(struct xfrmk_sadinfo *si); 970ecfd6b18SJamal Hadi Salim extern void xfrm_spd_getinfo(struct xfrm_spdinfo *si); 971a252cc23SAl Viro extern int xfrm_replay_check(struct xfrm_state *x, __be32 seq); 97261f4627bSAl Viro extern void xfrm_replay_advance(struct xfrm_state *x, __be32 seq); 973f8cd5488SJamal Hadi Salim extern void xfrm_replay_notify(struct xfrm_state *x, int event); 9741da177e4SLinus Torvalds extern int xfrm_state_check(struct xfrm_state *x, struct sk_buff *skb); 9751da177e4SLinus Torvalds extern int xfrm_state_mtu(struct xfrm_state *x, int mtu); 97672cb6962SHerbert Xu extern int xfrm_init_state(struct xfrm_state *x); 9771da177e4SLinus Torvalds extern int xfrm4_rcv(struct sk_buff *skb); 9781da177e4SLinus Torvalds extern int xfrm4_output(struct sk_buff *skb); 979c0d56408SKazunori MIYAZAWA extern int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family); 980c0d56408SKazunori MIYAZAWA extern int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family); 981a252cc23SAl Viro extern int xfrm6_rcv_spi(struct sk_buff *skb, __be32 spi); 982951dbc8aSPatrick McHardy extern int xfrm6_rcv(struct sk_buff **pskb); 983fbd9a5b4SMasahide NAKAMURA extern int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr, 984fbd9a5b4SMasahide NAKAMURA xfrm_address_t *saddr, u8 proto); 98573d605d1SKazunori MIYAZAWA extern int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family); 98673d605d1SKazunori MIYAZAWA extern int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family); 9878c689a6eSAl Viro extern __be32 xfrm6_tunnel_alloc_spi(xfrm_address_t *saddr); 9881da177e4SLinus Torvalds extern void xfrm6_tunnel_free_spi(xfrm_address_t *saddr); 9898c689a6eSAl Viro extern __be32 xfrm6_tunnel_spi_lookup(xfrm_address_t *saddr); 9901da177e4SLinus Torvalds extern int xfrm6_output(struct sk_buff *skb); 991aee5adb4SMasahide NAKAMURA extern int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb, 992aee5adb4SMasahide NAKAMURA u8 **prevhdr); 9931da177e4SLinus Torvalds 9941da177e4SLinus Torvalds #ifdef CONFIG_XFRM 9951da177e4SLinus Torvalds extern int xfrm4_rcv_encap(struct sk_buff *skb, __u16 encap_type); 9961da177e4SLinus Torvalds extern int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen); 9971da177e4SLinus Torvalds extern int xfrm_dst_lookup(struct xfrm_dst **dst, struct flowi *fl, unsigned short family); 9981da177e4SLinus Torvalds #else 9991da177e4SLinus Torvalds static inline int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen) 10001da177e4SLinus Torvalds { 10011da177e4SLinus Torvalds return -ENOPROTOOPT; 10021da177e4SLinus Torvalds } 10031da177e4SLinus Torvalds 10041da177e4SLinus Torvalds static inline int xfrm4_rcv_encap(struct sk_buff *skb, __u16 encap_type) 10051da177e4SLinus Torvalds { 10061da177e4SLinus Torvalds /* should not happen */ 10071da177e4SLinus Torvalds kfree_skb(skb); 10081da177e4SLinus Torvalds return 0; 10091da177e4SLinus Torvalds } 10101da177e4SLinus Torvalds static inline int xfrm_dst_lookup(struct xfrm_dst **dst, struct flowi *fl, unsigned short family) 10111da177e4SLinus Torvalds { 10121da177e4SLinus Torvalds return -EINVAL; 10131da177e4SLinus Torvalds } 10141da177e4SLinus Torvalds #endif 10151da177e4SLinus Torvalds 1016dd0fc66fSAl Viro struct xfrm_policy *xfrm_policy_alloc(gfp_t gfp); 10174e81bb83SMasahide NAKAMURA extern int xfrm_policy_walk(u8 type, int (*func)(struct xfrm_policy *, int, int, void*), void *); 10181da177e4SLinus Torvalds int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl); 10194e81bb83SMasahide NAKAMURA struct xfrm_policy *xfrm_policy_bysel_ctx(u8 type, int dir, 10204e81bb83SMasahide NAKAMURA struct xfrm_selector *sel, 1021ef41aaa0SEric Paris struct xfrm_sec_ctx *ctx, int delete, 1022ef41aaa0SEric Paris int *err); 1023ef41aaa0SEric Paris struct xfrm_policy *xfrm_policy_byid(u8, int dir, u32 id, int delete, int *err); 1024161a09e7SJoy Latten void xfrm_policy_flush(u8 type, struct xfrm_audit *audit_info); 10251da177e4SLinus Torvalds u32 xfrm_get_acqseq(void); 102626977b4eSAl Viro void xfrm_alloc_spi(struct xfrm_state *x, __be32 minspi, __be32 maxspi); 10271da177e4SLinus Torvalds struct xfrm_state * xfrm_find_acq(u8 mode, u32 reqid, u8 proto, 10281da177e4SLinus Torvalds xfrm_address_t *daddr, xfrm_address_t *saddr, 10291da177e4SLinus Torvalds int create, unsigned short family); 1030161a09e7SJoy Latten extern void xfrm_policy_flush(u8 type, struct xfrm_audit *audit_info); 10311da177e4SLinus Torvalds extern int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol); 10325b368e61SVenkat Yekkirala extern int xfrm_bundle_ok(struct xfrm_policy *pol, struct xfrm_dst *xdst, 10335b368e61SVenkat Yekkirala struct flowi *fl, int family, int strict); 10341da177e4SLinus Torvalds extern void xfrm_init_pmtu(struct dst_entry *dst); 10351da177e4SLinus Torvalds 103680c9abaaSShinta Sugimoto #ifdef CONFIG_XFRM_MIGRATE 103780c9abaaSShinta Sugimoto extern int km_migrate(struct xfrm_selector *sel, u8 dir, u8 type, 103880c9abaaSShinta Sugimoto struct xfrm_migrate *m, int num_bundles); 103980c9abaaSShinta Sugimoto extern struct xfrm_state * xfrm_migrate_state_find(struct xfrm_migrate *m); 104080c9abaaSShinta Sugimoto extern struct xfrm_state * xfrm_state_migrate(struct xfrm_state *x, 104180c9abaaSShinta Sugimoto struct xfrm_migrate *m); 104280c9abaaSShinta Sugimoto extern int xfrm_migrate(struct xfrm_selector *sel, u8 dir, u8 type, 104380c9abaaSShinta Sugimoto struct xfrm_migrate *m, int num_bundles); 104480c9abaaSShinta Sugimoto #endif 104580c9abaaSShinta Sugimoto 10461da177e4SLinus Torvalds extern wait_queue_head_t km_waitq; 10475d36b180SAl Viro extern int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); 10486c5c8ca7SJamal Hadi Salim extern void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 pid); 104997a64b45SMasahide NAKAMURA extern int km_report(u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr); 10501da177e4SLinus Torvalds 10511da177e4SLinus Torvalds extern void xfrm_input_init(void); 10526067b2baSAl Viro extern int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq); 10531da177e4SLinus Torvalds 10541da177e4SLinus Torvalds extern void xfrm_probe_algs(void); 10551da177e4SLinus Torvalds extern int xfrm_count_auth_supported(void); 10561da177e4SLinus Torvalds extern int xfrm_count_enc_supported(void); 10571da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx); 10581da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx); 10591da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id); 10601da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id); 10611da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id); 10621da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_aalg_get_byname(char *name, int probe); 10631da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_ealg_get_byname(char *name, int probe); 10641da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_calg_get_byname(char *name, int probe); 10651da177e4SLinus Torvalds 106607d4ee58SHerbert Xu struct hash_desc; 10679409f38aSHerbert Xu struct scatterlist; 106807d4ee58SHerbert Xu typedef int (icv_update_fn_t)(struct hash_desc *, struct scatterlist *, 106907d4ee58SHerbert Xu unsigned int); 10701da177e4SLinus Torvalds 107107d4ee58SHerbert Xu extern int skb_icv_walk(const struct sk_buff *skb, struct hash_desc *tfm, 10721da177e4SLinus Torvalds int offset, int len, icv_update_fn_t icv_update); 10731da177e4SLinus Torvalds 10741da177e4SLinus Torvalds static inline int xfrm_addr_cmp(xfrm_address_t *a, xfrm_address_t *b, 10751da177e4SLinus Torvalds int family) 10761da177e4SLinus Torvalds { 10771da177e4SLinus Torvalds switch (family) { 10781da177e4SLinus Torvalds default: 10791da177e4SLinus Torvalds case AF_INET: 10808c689a6eSAl Viro return (__force __u32)a->a4 - (__force __u32)b->a4; 10811da177e4SLinus Torvalds case AF_INET6: 10821da177e4SLinus Torvalds return ipv6_addr_cmp((struct in6_addr *)a, 10831da177e4SLinus Torvalds (struct in6_addr *)b); 10841da177e4SLinus Torvalds } 10851da177e4SLinus Torvalds } 10861da177e4SLinus Torvalds 108777d8d7a6SHerbert Xu static inline int xfrm_policy_id2dir(u32 index) 108877d8d7a6SHerbert Xu { 108977d8d7a6SHerbert Xu return index & 7; 109077d8d7a6SHerbert Xu } 109177d8d7a6SHerbert Xu 1092f8cd5488SJamal Hadi Salim static inline int xfrm_aevent_is_on(void) 1093f8cd5488SJamal Hadi Salim { 1094be33690dSPatrick McHardy struct sock *nlsk; 1095be33690dSPatrick McHardy int ret = 0; 1096be33690dSPatrick McHardy 1097be33690dSPatrick McHardy rcu_read_lock(); 1098be33690dSPatrick McHardy nlsk = rcu_dereference(xfrm_nl); 1099be33690dSPatrick McHardy if (nlsk) 1100be33690dSPatrick McHardy ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS); 1101be33690dSPatrick McHardy rcu_read_unlock(); 1102be33690dSPatrick McHardy return ret; 1103f8cd5488SJamal Hadi Salim } 1104f8cd5488SJamal Hadi Salim 1105f8cd5488SJamal Hadi Salim static inline void xfrm_aevent_doreplay(struct xfrm_state *x) 1106f8cd5488SJamal Hadi Salim { 1107f8cd5488SJamal Hadi Salim if (xfrm_aevent_is_on()) 1108f8cd5488SJamal Hadi Salim xfrm_replay_notify(x, XFRM_REPLAY_UPDATE); 1109f8cd5488SJamal Hadi Salim } 1110f8cd5488SJamal Hadi Salim 111180c9abaaSShinta Sugimoto #ifdef CONFIG_XFRM_MIGRATE 111280c9abaaSShinta Sugimoto static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig) 111380c9abaaSShinta Sugimoto { 111480c9abaaSShinta Sugimoto return (struct xfrm_algo *)kmemdup(orig, sizeof(*orig) + orig->alg_key_len, GFP_KERNEL); 111580c9abaaSShinta Sugimoto } 111680c9abaaSShinta Sugimoto 111780c9abaaSShinta Sugimoto static inline void xfrm_states_put(struct xfrm_state **states, int n) 111880c9abaaSShinta Sugimoto { 111980c9abaaSShinta Sugimoto int i; 112080c9abaaSShinta Sugimoto for (i = 0; i < n; i++) 112180c9abaaSShinta Sugimoto xfrm_state_put(*(states + i)); 112280c9abaaSShinta Sugimoto } 112380c9abaaSShinta Sugimoto 112480c9abaaSShinta Sugimoto static inline void xfrm_states_delete(struct xfrm_state **states, int n) 112580c9abaaSShinta Sugimoto { 112680c9abaaSShinta Sugimoto int i; 112780c9abaaSShinta Sugimoto for (i = 0; i < n; i++) 112880c9abaaSShinta Sugimoto xfrm_state_delete(*(states + i)); 112980c9abaaSShinta Sugimoto } 113080c9abaaSShinta Sugimoto #endif 1131f8cd5488SJamal Hadi Salim 11321da177e4SLinus Torvalds #endif /* _NET_XFRM_H */ 1133