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 */ 2821da177e4SLinus Torvalds u32 (*get_max_size)(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 419c9204d9cSJoy Latten #ifdef CONFIG_AUDITSYSCALL 420c9204d9cSJoy Latten extern void xfrm_audit_log(uid_t auid, u32 secid, int type, int result, 421161a09e7SJoy Latten struct xfrm_policy *xp, struct xfrm_state *x); 422c9204d9cSJoy Latten #else 423c9204d9cSJoy Latten #define xfrm_audit_log(a,s,t,r,p,x) do { ; } while (0) 424c9204d9cSJoy Latten #endif /* CONFIG_AUDITSYSCALL */ 425161a09e7SJoy Latten 4261da177e4SLinus Torvalds static inline void xfrm_pol_hold(struct xfrm_policy *policy) 4271da177e4SLinus Torvalds { 4281da177e4SLinus Torvalds if (likely(policy != NULL)) 4291da177e4SLinus Torvalds atomic_inc(&policy->refcnt); 4301da177e4SLinus Torvalds } 4311da177e4SLinus Torvalds 4321da177e4SLinus Torvalds extern void __xfrm_policy_destroy(struct xfrm_policy *policy); 4331da177e4SLinus Torvalds 4341da177e4SLinus Torvalds static inline void xfrm_pol_put(struct xfrm_policy *policy) 4351da177e4SLinus Torvalds { 4361da177e4SLinus Torvalds if (atomic_dec_and_test(&policy->refcnt)) 4371da177e4SLinus Torvalds __xfrm_policy_destroy(policy); 4381da177e4SLinus Torvalds } 4391da177e4SLinus Torvalds 4404e81bb83SMasahide NAKAMURA #ifdef CONFIG_XFRM_SUB_POLICY 4414e81bb83SMasahide NAKAMURA static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols) 4424e81bb83SMasahide NAKAMURA { 4434e81bb83SMasahide NAKAMURA int i; 4444e81bb83SMasahide NAKAMURA for (i = npols - 1; i >= 0; --i) 4454e81bb83SMasahide NAKAMURA xfrm_pol_put(pols[i]); 4464e81bb83SMasahide NAKAMURA } 4474e81bb83SMasahide NAKAMURA #else 4484e81bb83SMasahide NAKAMURA static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols) 4494e81bb83SMasahide NAKAMURA { 4504e81bb83SMasahide NAKAMURA xfrm_pol_put(pols[0]); 4514e81bb83SMasahide NAKAMURA } 4524e81bb83SMasahide NAKAMURA #endif 4534e81bb83SMasahide NAKAMURA 4541da177e4SLinus Torvalds extern void __xfrm_state_destroy(struct xfrm_state *); 4551da177e4SLinus Torvalds 45621380b81SHerbert Xu static inline void __xfrm_state_put(struct xfrm_state *x) 45721380b81SHerbert Xu { 45821380b81SHerbert Xu atomic_dec(&x->refcnt); 45921380b81SHerbert Xu } 46021380b81SHerbert Xu 4611da177e4SLinus Torvalds static inline void xfrm_state_put(struct xfrm_state *x) 4621da177e4SLinus Torvalds { 4631da177e4SLinus Torvalds if (atomic_dec_and_test(&x->refcnt)) 4641da177e4SLinus Torvalds __xfrm_state_destroy(x); 4651da177e4SLinus Torvalds } 4661da177e4SLinus Torvalds 4671da177e4SLinus Torvalds static inline void xfrm_state_hold(struct xfrm_state *x) 4681da177e4SLinus Torvalds { 4691da177e4SLinus Torvalds atomic_inc(&x->refcnt); 4701da177e4SLinus Torvalds } 4711da177e4SLinus Torvalds 4721da177e4SLinus Torvalds static __inline__ int addr_match(void *token1, void *token2, int prefixlen) 4731da177e4SLinus Torvalds { 4745f19343fSAl Viro __be32 *a1 = token1; 4755f19343fSAl Viro __be32 *a2 = token2; 4761da177e4SLinus Torvalds int pdw; 4771da177e4SLinus Torvalds int pbi; 4781da177e4SLinus Torvalds 4791da177e4SLinus Torvalds pdw = prefixlen >> 5; /* num of whole __u32 in prefix */ 4801da177e4SLinus Torvalds pbi = prefixlen & 0x1f; /* num of bits in incomplete u32 in prefix */ 4811da177e4SLinus Torvalds 4821da177e4SLinus Torvalds if (pdw) 4831da177e4SLinus Torvalds if (memcmp(a1, a2, pdw << 2)) 4841da177e4SLinus Torvalds return 0; 4851da177e4SLinus Torvalds 4861da177e4SLinus Torvalds if (pbi) { 4875f19343fSAl Viro __be32 mask; 4881da177e4SLinus Torvalds 4891da177e4SLinus Torvalds mask = htonl((0xffffffff) << (32 - pbi)); 4901da177e4SLinus Torvalds 4911da177e4SLinus Torvalds if ((a1[pdw] ^ a2[pdw]) & mask) 4921da177e4SLinus Torvalds return 0; 4931da177e4SLinus Torvalds } 4941da177e4SLinus Torvalds 4951da177e4SLinus Torvalds return 1; 4961da177e4SLinus Torvalds } 4971da177e4SLinus Torvalds 4981da177e4SLinus Torvalds static __inline__ 499f9d07e41SAl Viro __be16 xfrm_flowi_sport(struct flowi *fl) 5001da177e4SLinus Torvalds { 501f9d07e41SAl Viro __be16 port; 5021da177e4SLinus Torvalds switch(fl->proto) { 5031da177e4SLinus Torvalds case IPPROTO_TCP: 5041da177e4SLinus Torvalds case IPPROTO_UDP: 505ba4e58ecSGerrit Renker case IPPROTO_UDPLITE: 5061da177e4SLinus Torvalds case IPPROTO_SCTP: 5071da177e4SLinus Torvalds port = fl->fl_ip_sport; 5081da177e4SLinus Torvalds break; 5091da177e4SLinus Torvalds case IPPROTO_ICMP: 5101da177e4SLinus Torvalds case IPPROTO_ICMPV6: 5111da177e4SLinus Torvalds port = htons(fl->fl_icmp_type); 5121da177e4SLinus Torvalds break; 5132ce4272aSMasahide NAKAMURA #ifdef CONFIG_IPV6_MIP6 5142ce4272aSMasahide NAKAMURA case IPPROTO_MH: 5152ce4272aSMasahide NAKAMURA port = htons(fl->fl_mh_type); 5162ce4272aSMasahide NAKAMURA break; 5172ce4272aSMasahide NAKAMURA #endif 5181da177e4SLinus Torvalds default: 5191da177e4SLinus Torvalds port = 0; /*XXX*/ 5201da177e4SLinus Torvalds } 5211da177e4SLinus Torvalds return port; 5221da177e4SLinus Torvalds } 5231da177e4SLinus Torvalds 5241da177e4SLinus Torvalds static __inline__ 525f9d07e41SAl Viro __be16 xfrm_flowi_dport(struct flowi *fl) 5261da177e4SLinus Torvalds { 527f9d07e41SAl Viro __be16 port; 5281da177e4SLinus Torvalds switch(fl->proto) { 5291da177e4SLinus Torvalds case IPPROTO_TCP: 5301da177e4SLinus Torvalds case IPPROTO_UDP: 531ba4e58ecSGerrit Renker case IPPROTO_UDPLITE: 5321da177e4SLinus Torvalds case IPPROTO_SCTP: 5331da177e4SLinus Torvalds port = fl->fl_ip_dport; 5341da177e4SLinus Torvalds break; 5351da177e4SLinus Torvalds case IPPROTO_ICMP: 5361da177e4SLinus Torvalds case IPPROTO_ICMPV6: 5371da177e4SLinus Torvalds port = htons(fl->fl_icmp_code); 5381da177e4SLinus Torvalds break; 5391da177e4SLinus Torvalds default: 5401da177e4SLinus Torvalds port = 0; /*XXX*/ 5411da177e4SLinus Torvalds } 5421da177e4SLinus Torvalds return port; 5431da177e4SLinus Torvalds } 5441da177e4SLinus Torvalds 54577681021SAndrew Morton extern int xfrm_selector_match(struct xfrm_selector *sel, struct flowi *fl, 54677681021SAndrew Morton unsigned short family); 5471da177e4SLinus Torvalds 548df71837dSTrent Jaeger #ifdef CONFIG_SECURITY_NETWORK_XFRM 549df71837dSTrent Jaeger /* If neither has a context --> match 550df71837dSTrent Jaeger * Otherwise, both must have a context and the sids, doi, alg must match 551df71837dSTrent Jaeger */ 552df71837dSTrent Jaeger static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) 553df71837dSTrent Jaeger { 554df71837dSTrent Jaeger return ((!s1 && !s2) || 555df71837dSTrent Jaeger (s1 && s2 && 556df71837dSTrent Jaeger (s1->ctx_sid == s2->ctx_sid) && 557df71837dSTrent Jaeger (s1->ctx_doi == s2->ctx_doi) && 558df71837dSTrent Jaeger (s1->ctx_alg == s2->ctx_alg))); 559df71837dSTrent Jaeger } 560df71837dSTrent Jaeger #else 561df71837dSTrent Jaeger static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) 562df71837dSTrent Jaeger { 563df71837dSTrent Jaeger return 1; 564df71837dSTrent Jaeger } 565df71837dSTrent Jaeger #endif 566df71837dSTrent Jaeger 5671da177e4SLinus Torvalds /* A struct encoding bundle of transformations to apply to some set of flow. 5681da177e4SLinus Torvalds * 5691da177e4SLinus Torvalds * dst->child points to the next element of bundle. 5701da177e4SLinus Torvalds * dst->xfrm points to an instanse of transformer. 5711da177e4SLinus Torvalds * 5721da177e4SLinus Torvalds * Due to unfortunate limitations of current routing cache, which we 5731da177e4SLinus Torvalds * have no time to fix, it mirrors struct rtable and bound to the same 5741da177e4SLinus Torvalds * routing key, including saddr,daddr. However, we can have many of 5751da177e4SLinus Torvalds * bundles differing by session id. All the bundles grow from a parent 5761da177e4SLinus Torvalds * policy rule. 5771da177e4SLinus Torvalds */ 5781da177e4SLinus Torvalds struct xfrm_dst 5791da177e4SLinus Torvalds { 5801da177e4SLinus Torvalds union { 5811da177e4SLinus Torvalds struct xfrm_dst *next; 5821da177e4SLinus Torvalds struct dst_entry dst; 5831da177e4SLinus Torvalds struct rtable rt; 5841da177e4SLinus Torvalds struct rt6_info rt6; 5851da177e4SLinus Torvalds } u; 5861da177e4SLinus Torvalds struct dst_entry *route; 5879d4a706dSDavid S. Miller u32 genid; 5881da177e4SLinus Torvalds u32 route_mtu_cached; 5891da177e4SLinus Torvalds u32 child_mtu_cached; 59092d63decSHideaki YOSHIFUJI u32 route_cookie; 59192d63decSHideaki YOSHIFUJI u32 path_cookie; 5921da177e4SLinus Torvalds }; 5931da177e4SLinus Torvalds 594aabc9761SHerbert Xu static inline void xfrm_dst_destroy(struct xfrm_dst *xdst) 595aabc9761SHerbert Xu { 596aabc9761SHerbert Xu dst_release(xdst->route); 597aabc9761SHerbert Xu if (likely(xdst->u.dst.xfrm)) 598aabc9761SHerbert Xu xfrm_state_put(xdst->u.dst.xfrm); 599aabc9761SHerbert Xu } 600aabc9761SHerbert Xu 601aabc9761SHerbert Xu extern void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev); 602aabc9761SHerbert Xu 6031da177e4SLinus Torvalds struct sec_path 6041da177e4SLinus Torvalds { 6051da177e4SLinus Torvalds atomic_t refcnt; 6061da177e4SLinus Torvalds int len; 607dbe5b4aaSHerbert Xu struct xfrm_state *xvec[XFRM_MAX_DEPTH]; 6081da177e4SLinus Torvalds }; 6091da177e4SLinus Torvalds 6101da177e4SLinus Torvalds static inline struct sec_path * 6111da177e4SLinus Torvalds secpath_get(struct sec_path *sp) 6121da177e4SLinus Torvalds { 6131da177e4SLinus Torvalds if (sp) 6141da177e4SLinus Torvalds atomic_inc(&sp->refcnt); 6151da177e4SLinus Torvalds return sp; 6161da177e4SLinus Torvalds } 6171da177e4SLinus Torvalds 6181da177e4SLinus Torvalds extern void __secpath_destroy(struct sec_path *sp); 6191da177e4SLinus Torvalds 6201da177e4SLinus Torvalds static inline void 6211da177e4SLinus Torvalds secpath_put(struct sec_path *sp) 6221da177e4SLinus Torvalds { 6231da177e4SLinus Torvalds if (sp && atomic_dec_and_test(&sp->refcnt)) 6241da177e4SLinus Torvalds __secpath_destroy(sp); 6251da177e4SLinus Torvalds } 6261da177e4SLinus Torvalds 6271da177e4SLinus Torvalds extern struct sec_path *secpath_dup(struct sec_path *src); 6281da177e4SLinus Torvalds 6291da177e4SLinus Torvalds static inline void 6301da177e4SLinus Torvalds secpath_reset(struct sk_buff *skb) 6311da177e4SLinus Torvalds { 6321da177e4SLinus Torvalds #ifdef CONFIG_XFRM 6331da177e4SLinus Torvalds secpath_put(skb->sp); 6341da177e4SLinus Torvalds skb->sp = NULL; 6351da177e4SLinus Torvalds #endif 6361da177e4SLinus Torvalds } 6371da177e4SLinus Torvalds 6381da177e4SLinus Torvalds static inline int 639a1e59abfSPatrick McHardy xfrm_addr_any(xfrm_address_t *addr, unsigned short family) 640a1e59abfSPatrick McHardy { 641a1e59abfSPatrick McHardy switch (family) { 642a1e59abfSPatrick McHardy case AF_INET: 643a1e59abfSPatrick McHardy return addr->a4 == 0; 644a1e59abfSPatrick McHardy case AF_INET6: 645a1e59abfSPatrick McHardy return ipv6_addr_any((struct in6_addr *)&addr->a6); 646a1e59abfSPatrick McHardy } 647a1e59abfSPatrick McHardy return 0; 648a1e59abfSPatrick McHardy } 649a1e59abfSPatrick McHardy 650a1e59abfSPatrick McHardy static inline int 6511da177e4SLinus Torvalds __xfrm4_state_addr_cmp(struct xfrm_tmpl *tmpl, struct xfrm_state *x) 6521da177e4SLinus Torvalds { 6531da177e4SLinus Torvalds return (tmpl->saddr.a4 && 6541da177e4SLinus Torvalds tmpl->saddr.a4 != x->props.saddr.a4); 6551da177e4SLinus Torvalds } 6561da177e4SLinus Torvalds 6571da177e4SLinus Torvalds static inline int 6581da177e4SLinus Torvalds __xfrm6_state_addr_cmp(struct xfrm_tmpl *tmpl, struct xfrm_state *x) 6591da177e4SLinus Torvalds { 6601da177e4SLinus Torvalds return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) && 6611da177e4SLinus Torvalds ipv6_addr_cmp((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr)); 6621da177e4SLinus Torvalds } 6631da177e4SLinus Torvalds 6641da177e4SLinus Torvalds static inline int 6651da177e4SLinus Torvalds xfrm_state_addr_cmp(struct xfrm_tmpl *tmpl, struct xfrm_state *x, unsigned short family) 6661da177e4SLinus Torvalds { 6671da177e4SLinus Torvalds switch (family) { 6681da177e4SLinus Torvalds case AF_INET: 6691da177e4SLinus Torvalds return __xfrm4_state_addr_cmp(tmpl, x); 6701da177e4SLinus Torvalds case AF_INET6: 6711da177e4SLinus Torvalds return __xfrm6_state_addr_cmp(tmpl, x); 6721da177e4SLinus Torvalds } 6731da177e4SLinus Torvalds return !0; 6741da177e4SLinus Torvalds } 6751da177e4SLinus Torvalds 6761da177e4SLinus Torvalds #ifdef CONFIG_XFRM 6771da177e4SLinus Torvalds 6781da177e4SLinus Torvalds extern int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb, unsigned short family); 6791da177e4SLinus Torvalds 6801da177e4SLinus Torvalds static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) 6811da177e4SLinus Torvalds { 6821da177e4SLinus Torvalds if (sk && sk->sk_policy[XFRM_POLICY_IN]) 6831da177e4SLinus Torvalds return __xfrm_policy_check(sk, dir, skb, family); 6841da177e4SLinus Torvalds 6852518c7c2SDavid S. Miller return (!xfrm_policy_count[dir] && !skb->sp) || 6861da177e4SLinus Torvalds (skb->dst->flags & DST_NOPOLICY) || 6871da177e4SLinus Torvalds __xfrm_policy_check(sk, dir, skb, family); 6881da177e4SLinus Torvalds } 6891da177e4SLinus Torvalds 6901da177e4SLinus Torvalds static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 6911da177e4SLinus Torvalds { 6921da177e4SLinus Torvalds return xfrm_policy_check(sk, dir, skb, AF_INET); 6931da177e4SLinus Torvalds } 6941da177e4SLinus Torvalds 6951da177e4SLinus Torvalds static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 6961da177e4SLinus Torvalds { 6971da177e4SLinus Torvalds return xfrm_policy_check(sk, dir, skb, AF_INET6); 6981da177e4SLinus Torvalds } 6991da177e4SLinus Torvalds 7003e3850e9SPatrick McHardy extern int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, unsigned short family); 7011da177e4SLinus Torvalds extern int __xfrm_route_forward(struct sk_buff *skb, unsigned short family); 7021da177e4SLinus Torvalds 7031da177e4SLinus Torvalds static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family) 7041da177e4SLinus Torvalds { 7052518c7c2SDavid S. Miller return !xfrm_policy_count[XFRM_POLICY_OUT] || 7061da177e4SLinus Torvalds (skb->dst->flags & DST_NOXFRM) || 7071da177e4SLinus Torvalds __xfrm_route_forward(skb, family); 7081da177e4SLinus Torvalds } 7091da177e4SLinus Torvalds 7101da177e4SLinus Torvalds static inline int xfrm4_route_forward(struct sk_buff *skb) 7111da177e4SLinus Torvalds { 7121da177e4SLinus Torvalds return xfrm_route_forward(skb, AF_INET); 7131da177e4SLinus Torvalds } 7141da177e4SLinus Torvalds 7151da177e4SLinus Torvalds static inline int xfrm6_route_forward(struct sk_buff *skb) 7161da177e4SLinus Torvalds { 7171da177e4SLinus Torvalds return xfrm_route_forward(skb, AF_INET6); 7181da177e4SLinus Torvalds } 7191da177e4SLinus Torvalds 7201da177e4SLinus Torvalds extern int __xfrm_sk_clone_policy(struct sock *sk); 7211da177e4SLinus Torvalds 7221da177e4SLinus Torvalds static inline int xfrm_sk_clone_policy(struct sock *sk) 7231da177e4SLinus Torvalds { 7241da177e4SLinus Torvalds if (unlikely(sk->sk_policy[0] || sk->sk_policy[1])) 7251da177e4SLinus Torvalds return __xfrm_sk_clone_policy(sk); 7261da177e4SLinus Torvalds return 0; 7271da177e4SLinus Torvalds } 7281da177e4SLinus Torvalds 7294666faabSHerbert Xu extern int xfrm_policy_delete(struct xfrm_policy *pol, int dir); 7301da177e4SLinus Torvalds 7311da177e4SLinus Torvalds static inline void xfrm_sk_free_policy(struct sock *sk) 7321da177e4SLinus Torvalds { 7331da177e4SLinus Torvalds if (unlikely(sk->sk_policy[0] != NULL)) { 7341da177e4SLinus Torvalds xfrm_policy_delete(sk->sk_policy[0], XFRM_POLICY_MAX); 7351da177e4SLinus Torvalds sk->sk_policy[0] = NULL; 7361da177e4SLinus Torvalds } 7371da177e4SLinus Torvalds if (unlikely(sk->sk_policy[1] != NULL)) { 7381da177e4SLinus Torvalds xfrm_policy_delete(sk->sk_policy[1], XFRM_POLICY_MAX+1); 7391da177e4SLinus Torvalds sk->sk_policy[1] = NULL; 7401da177e4SLinus Torvalds } 7411da177e4SLinus Torvalds } 7421da177e4SLinus Torvalds 7431da177e4SLinus Torvalds #else 7441da177e4SLinus Torvalds 7451da177e4SLinus Torvalds static inline void xfrm_sk_free_policy(struct sock *sk) {} 7461da177e4SLinus Torvalds static inline int xfrm_sk_clone_policy(struct sock *sk) { return 0; } 7471da177e4SLinus Torvalds static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; } 7481da177e4SLinus Torvalds static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; } 7491da177e4SLinus Torvalds static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 7501da177e4SLinus Torvalds { 7511da177e4SLinus Torvalds return 1; 7521da177e4SLinus Torvalds } 7531da177e4SLinus Torvalds static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 7541da177e4SLinus Torvalds { 7551da177e4SLinus Torvalds return 1; 7561da177e4SLinus Torvalds } 7571da177e4SLinus Torvalds static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) 7581da177e4SLinus Torvalds { 7591da177e4SLinus Torvalds return 1; 7601da177e4SLinus Torvalds } 7611da177e4SLinus Torvalds #endif 7621da177e4SLinus Torvalds 7631da177e4SLinus Torvalds static __inline__ 7641da177e4SLinus Torvalds xfrm_address_t *xfrm_flowi_daddr(struct flowi *fl, unsigned short family) 7651da177e4SLinus Torvalds { 7661da177e4SLinus Torvalds switch (family){ 7671da177e4SLinus Torvalds case AF_INET: 7681da177e4SLinus Torvalds return (xfrm_address_t *)&fl->fl4_dst; 7691da177e4SLinus Torvalds case AF_INET6: 7701da177e4SLinus Torvalds return (xfrm_address_t *)&fl->fl6_dst; 7711da177e4SLinus Torvalds } 7721da177e4SLinus Torvalds return NULL; 7731da177e4SLinus Torvalds } 7741da177e4SLinus Torvalds 7751da177e4SLinus Torvalds static __inline__ 7761da177e4SLinus Torvalds xfrm_address_t *xfrm_flowi_saddr(struct flowi *fl, unsigned short family) 7771da177e4SLinus Torvalds { 7781da177e4SLinus Torvalds switch (family){ 7791da177e4SLinus Torvalds case AF_INET: 7801da177e4SLinus Torvalds return (xfrm_address_t *)&fl->fl4_src; 7811da177e4SLinus Torvalds case AF_INET6: 7821da177e4SLinus Torvalds return (xfrm_address_t *)&fl->fl6_src; 7831da177e4SLinus Torvalds } 7841da177e4SLinus Torvalds return NULL; 7851da177e4SLinus Torvalds } 7861da177e4SLinus Torvalds 7871da177e4SLinus Torvalds static __inline__ int 7881da177e4SLinus Torvalds __xfrm4_state_addr_check(struct xfrm_state *x, 7891da177e4SLinus Torvalds xfrm_address_t *daddr, xfrm_address_t *saddr) 7901da177e4SLinus Torvalds { 7911da177e4SLinus Torvalds if (daddr->a4 == x->id.daddr.a4 && 7921da177e4SLinus Torvalds (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4)) 7931da177e4SLinus Torvalds return 1; 7941da177e4SLinus Torvalds return 0; 7951da177e4SLinus Torvalds } 7961da177e4SLinus Torvalds 7971da177e4SLinus Torvalds static __inline__ int 7981da177e4SLinus Torvalds __xfrm6_state_addr_check(struct xfrm_state *x, 7991da177e4SLinus Torvalds xfrm_address_t *daddr, xfrm_address_t *saddr) 8001da177e4SLinus Torvalds { 8011da177e4SLinus Torvalds if (!ipv6_addr_cmp((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) && 8021da177e4SLinus Torvalds (!ipv6_addr_cmp((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr)|| 8031da177e4SLinus Torvalds ipv6_addr_any((struct in6_addr *)saddr) || 8041da177e4SLinus Torvalds ipv6_addr_any((struct in6_addr *)&x->props.saddr))) 8051da177e4SLinus Torvalds return 1; 8061da177e4SLinus Torvalds return 0; 8071da177e4SLinus Torvalds } 8081da177e4SLinus Torvalds 8091da177e4SLinus Torvalds static __inline__ int 8101da177e4SLinus Torvalds xfrm_state_addr_check(struct xfrm_state *x, 8111da177e4SLinus Torvalds xfrm_address_t *daddr, xfrm_address_t *saddr, 8121da177e4SLinus Torvalds unsigned short family) 8131da177e4SLinus Torvalds { 8141da177e4SLinus Torvalds switch (family) { 8151da177e4SLinus Torvalds case AF_INET: 8161da177e4SLinus Torvalds return __xfrm4_state_addr_check(x, daddr, saddr); 8171da177e4SLinus Torvalds case AF_INET6: 8181da177e4SLinus Torvalds return __xfrm6_state_addr_check(x, daddr, saddr); 8191da177e4SLinus Torvalds } 8201da177e4SLinus Torvalds return 0; 8211da177e4SLinus Torvalds } 8221da177e4SLinus Torvalds 823e53820deSMasahide NAKAMURA static __inline__ int 824e53820deSMasahide NAKAMURA xfrm_state_addr_flow_check(struct xfrm_state *x, struct flowi *fl, 825e53820deSMasahide NAKAMURA unsigned short family) 826e53820deSMasahide NAKAMURA { 827e53820deSMasahide NAKAMURA switch (family) { 828e53820deSMasahide NAKAMURA case AF_INET: 829e53820deSMasahide NAKAMURA return __xfrm4_state_addr_check(x, 830e53820deSMasahide NAKAMURA (xfrm_address_t *)&fl->fl4_dst, 831e53820deSMasahide NAKAMURA (xfrm_address_t *)&fl->fl4_src); 832e53820deSMasahide NAKAMURA case AF_INET6: 833e53820deSMasahide NAKAMURA return __xfrm6_state_addr_check(x, 834e53820deSMasahide NAKAMURA (xfrm_address_t *)&fl->fl6_dst, 835e53820deSMasahide NAKAMURA (xfrm_address_t *)&fl->fl6_src); 836e53820deSMasahide NAKAMURA } 837e53820deSMasahide NAKAMURA return 0; 838e53820deSMasahide NAKAMURA } 839e53820deSMasahide NAKAMURA 8401da177e4SLinus Torvalds static inline int xfrm_state_kern(struct xfrm_state *x) 8411da177e4SLinus Torvalds { 8421da177e4SLinus Torvalds return atomic_read(&x->tunnel_users); 8431da177e4SLinus Torvalds } 8441da177e4SLinus Torvalds 8455794708fSMasahide NAKAMURA static inline int xfrm_id_proto_match(u8 proto, u8 userproto) 8465794708fSMasahide NAKAMURA { 847dc00a525SMasahide NAKAMURA return (!userproto || proto == userproto || 848dc00a525SMasahide NAKAMURA (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH || 849dc00a525SMasahide NAKAMURA proto == IPPROTO_ESP || 850dc00a525SMasahide NAKAMURA proto == IPPROTO_COMP))); 8515794708fSMasahide NAKAMURA } 8525794708fSMasahide NAKAMURA 8531da177e4SLinus Torvalds /* 8541da177e4SLinus Torvalds * xfrm algorithm information 8551da177e4SLinus Torvalds */ 8561da177e4SLinus Torvalds struct xfrm_algo_auth_info { 8571da177e4SLinus Torvalds u16 icv_truncbits; 8581da177e4SLinus Torvalds u16 icv_fullbits; 8591da177e4SLinus Torvalds }; 8601da177e4SLinus Torvalds 8611da177e4SLinus Torvalds struct xfrm_algo_encr_info { 8621da177e4SLinus Torvalds u16 blockbits; 8631da177e4SLinus Torvalds u16 defkeybits; 8641da177e4SLinus Torvalds }; 8651da177e4SLinus Torvalds 8661da177e4SLinus Torvalds struct xfrm_algo_comp_info { 8671da177e4SLinus Torvalds u16 threshold; 8681da177e4SLinus Torvalds }; 8691da177e4SLinus Torvalds 8701da177e4SLinus Torvalds struct xfrm_algo_desc { 8711da177e4SLinus Torvalds char *name; 87204ff1260SHerbert Xu char *compat; 8731da177e4SLinus Torvalds u8 available:1; 8741da177e4SLinus Torvalds union { 8751da177e4SLinus Torvalds struct xfrm_algo_auth_info auth; 8761da177e4SLinus Torvalds struct xfrm_algo_encr_info encr; 8771da177e4SLinus Torvalds struct xfrm_algo_comp_info comp; 8781da177e4SLinus Torvalds } uinfo; 8791da177e4SLinus Torvalds struct sadb_alg desc; 8801da177e4SLinus Torvalds }; 8811da177e4SLinus Torvalds 8821da177e4SLinus Torvalds /* XFRM tunnel handlers. */ 8831da177e4SLinus Torvalds struct xfrm_tunnel { 8841da177e4SLinus Torvalds int (*handler)(struct sk_buff *skb); 885d2acc347SHerbert Xu int (*err_handler)(struct sk_buff *skb, __u32 info); 886d2acc347SHerbert Xu 887d2acc347SHerbert Xu struct xfrm_tunnel *next; 888d2acc347SHerbert Xu int priority; 8891da177e4SLinus Torvalds }; 8901da177e4SLinus Torvalds 8911da177e4SLinus Torvalds struct xfrm6_tunnel { 892d2acc347SHerbert Xu int (*handler)(struct sk_buff *skb); 893d2acc347SHerbert Xu int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt, 89404ce6909SAl Viro int type, int code, int offset, __be32 info); 895d2acc347SHerbert Xu struct xfrm6_tunnel *next; 896d2acc347SHerbert Xu int priority; 8971da177e4SLinus Torvalds }; 8981da177e4SLinus Torvalds 8991da177e4SLinus Torvalds extern void xfrm_init(void); 9001da177e4SLinus Torvalds extern void xfrm4_init(void); 9011da177e4SLinus Torvalds extern void xfrm6_init(void); 9021da177e4SLinus Torvalds extern void xfrm6_fini(void); 9031da177e4SLinus Torvalds extern void xfrm_state_init(void); 9041da177e4SLinus Torvalds extern void xfrm4_state_init(void); 9051da177e4SLinus Torvalds extern void xfrm6_state_init(void); 9061da177e4SLinus Torvalds extern void xfrm6_state_fini(void); 9071da177e4SLinus Torvalds 9081da177e4SLinus Torvalds extern int xfrm_state_walk(u8 proto, int (*func)(struct xfrm_state *, int, void*), void *); 9091da177e4SLinus Torvalds extern struct xfrm_state *xfrm_state_alloc(void); 9101da177e4SLinus Torvalds extern struct xfrm_state *xfrm_state_find(xfrm_address_t *daddr, xfrm_address_t *saddr, 9111da177e4SLinus Torvalds struct flowi *fl, struct xfrm_tmpl *tmpl, 9121da177e4SLinus Torvalds struct xfrm_policy *pol, int *err, 9131da177e4SLinus Torvalds unsigned short family); 9141da177e4SLinus Torvalds extern int xfrm_state_check_expire(struct xfrm_state *x); 9151da177e4SLinus Torvalds extern void xfrm_state_insert(struct xfrm_state *x); 9161da177e4SLinus Torvalds extern int xfrm_state_add(struct xfrm_state *x); 9171da177e4SLinus Torvalds extern int xfrm_state_update(struct xfrm_state *x); 918a94cfd19SAl Viro extern struct xfrm_state *xfrm_state_lookup(xfrm_address_t *daddr, __be32 spi, u8 proto, unsigned short family); 919eb2971b6SMasahide NAKAMURA extern struct xfrm_state *xfrm_state_lookup_byaddr(xfrm_address_t *daddr, xfrm_address_t *saddr, u8 proto, unsigned short family); 92041a49cc3SMasahide NAKAMURA #ifdef CONFIG_XFRM_SUB_POLICY 92141a49cc3SMasahide NAKAMURA extern int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, 92241a49cc3SMasahide NAKAMURA int n, unsigned short family); 92341a49cc3SMasahide NAKAMURA extern int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, 92441a49cc3SMasahide NAKAMURA int n, unsigned short family); 92541a49cc3SMasahide NAKAMURA #else 92641a49cc3SMasahide NAKAMURA static inline int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, 92741a49cc3SMasahide NAKAMURA int n, unsigned short family) 92841a49cc3SMasahide NAKAMURA { 92941a49cc3SMasahide NAKAMURA return -ENOSYS; 93041a49cc3SMasahide NAKAMURA } 93141a49cc3SMasahide NAKAMURA 93241a49cc3SMasahide NAKAMURA static inline int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, 93341a49cc3SMasahide NAKAMURA int n, unsigned short family) 93441a49cc3SMasahide NAKAMURA { 93541a49cc3SMasahide NAKAMURA return -ENOSYS; 93641a49cc3SMasahide NAKAMURA } 93741a49cc3SMasahide NAKAMURA #endif 9381da177e4SLinus Torvalds extern struct xfrm_state *xfrm_find_acq_byseq(u32 seq); 93926b15dadSJamal Hadi Salim extern int xfrm_state_delete(struct xfrm_state *x); 940161a09e7SJoy Latten extern void xfrm_state_flush(u8 proto, struct xfrm_audit *audit_info); 941a252cc23SAl Viro extern int xfrm_replay_check(struct xfrm_state *x, __be32 seq); 94261f4627bSAl Viro extern void xfrm_replay_advance(struct xfrm_state *x, __be32 seq); 943f8cd5488SJamal Hadi Salim extern void xfrm_replay_notify(struct xfrm_state *x, int event); 9441da177e4SLinus Torvalds extern int xfrm_state_check(struct xfrm_state *x, struct sk_buff *skb); 9451da177e4SLinus Torvalds extern int xfrm_state_mtu(struct xfrm_state *x, int mtu); 94672cb6962SHerbert Xu extern int xfrm_init_state(struct xfrm_state *x); 9471da177e4SLinus Torvalds extern int xfrm4_rcv(struct sk_buff *skb); 9481da177e4SLinus Torvalds extern int xfrm4_output(struct sk_buff *skb); 949c0d56408SKazunori MIYAZAWA extern int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family); 950c0d56408SKazunori MIYAZAWA extern int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family); 951a252cc23SAl Viro extern int xfrm6_rcv_spi(struct sk_buff *skb, __be32 spi); 952951dbc8aSPatrick McHardy extern int xfrm6_rcv(struct sk_buff **pskb); 953fbd9a5b4SMasahide NAKAMURA extern int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr, 954fbd9a5b4SMasahide NAKAMURA xfrm_address_t *saddr, u8 proto); 95573d605d1SKazunori MIYAZAWA extern int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family); 95673d605d1SKazunori MIYAZAWA extern int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family); 9578c689a6eSAl Viro extern __be32 xfrm6_tunnel_alloc_spi(xfrm_address_t *saddr); 9581da177e4SLinus Torvalds extern void xfrm6_tunnel_free_spi(xfrm_address_t *saddr); 9598c689a6eSAl Viro extern __be32 xfrm6_tunnel_spi_lookup(xfrm_address_t *saddr); 9601da177e4SLinus Torvalds extern int xfrm6_output(struct sk_buff *skb); 961aee5adb4SMasahide NAKAMURA extern int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb, 962aee5adb4SMasahide NAKAMURA u8 **prevhdr); 9631da177e4SLinus Torvalds 9641da177e4SLinus Torvalds #ifdef CONFIG_XFRM 9651da177e4SLinus Torvalds extern int xfrm4_rcv_encap(struct sk_buff *skb, __u16 encap_type); 9661da177e4SLinus Torvalds extern int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen); 9671da177e4SLinus Torvalds extern int xfrm_dst_lookup(struct xfrm_dst **dst, struct flowi *fl, unsigned short family); 9681da177e4SLinus Torvalds #else 9691da177e4SLinus Torvalds static inline int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen) 9701da177e4SLinus Torvalds { 9711da177e4SLinus Torvalds return -ENOPROTOOPT; 9721da177e4SLinus Torvalds } 9731da177e4SLinus Torvalds 9741da177e4SLinus Torvalds static inline int xfrm4_rcv_encap(struct sk_buff *skb, __u16 encap_type) 9751da177e4SLinus Torvalds { 9761da177e4SLinus Torvalds /* should not happen */ 9771da177e4SLinus Torvalds kfree_skb(skb); 9781da177e4SLinus Torvalds return 0; 9791da177e4SLinus Torvalds } 9801da177e4SLinus Torvalds static inline int xfrm_dst_lookup(struct xfrm_dst **dst, struct flowi *fl, unsigned short family) 9811da177e4SLinus Torvalds { 9821da177e4SLinus Torvalds return -EINVAL; 9831da177e4SLinus Torvalds } 9841da177e4SLinus Torvalds #endif 9851da177e4SLinus Torvalds 986dd0fc66fSAl Viro struct xfrm_policy *xfrm_policy_alloc(gfp_t gfp); 9874e81bb83SMasahide NAKAMURA extern int xfrm_policy_walk(u8 type, int (*func)(struct xfrm_policy *, int, int, void*), void *); 9881da177e4SLinus Torvalds int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl); 9894e81bb83SMasahide NAKAMURA struct xfrm_policy *xfrm_policy_bysel_ctx(u8 type, int dir, 9904e81bb83SMasahide NAKAMURA struct xfrm_selector *sel, 991*ef41aaa0SEric Paris struct xfrm_sec_ctx *ctx, int delete, 992*ef41aaa0SEric Paris int *err); 993*ef41aaa0SEric Paris struct xfrm_policy *xfrm_policy_byid(u8, int dir, u32 id, int delete, int *err); 994161a09e7SJoy Latten void xfrm_policy_flush(u8 type, struct xfrm_audit *audit_info); 9951da177e4SLinus Torvalds u32 xfrm_get_acqseq(void); 99626977b4eSAl Viro void xfrm_alloc_spi(struct xfrm_state *x, __be32 minspi, __be32 maxspi); 9971da177e4SLinus Torvalds struct xfrm_state * xfrm_find_acq(u8 mode, u32 reqid, u8 proto, 9981da177e4SLinus Torvalds xfrm_address_t *daddr, xfrm_address_t *saddr, 9991da177e4SLinus Torvalds int create, unsigned short family); 1000161a09e7SJoy Latten extern void xfrm_policy_flush(u8 type, struct xfrm_audit *audit_info); 10011da177e4SLinus Torvalds extern int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol); 10025b368e61SVenkat Yekkirala extern int xfrm_bundle_ok(struct xfrm_policy *pol, struct xfrm_dst *xdst, 10035b368e61SVenkat Yekkirala struct flowi *fl, int family, int strict); 10041da177e4SLinus Torvalds extern void xfrm_init_pmtu(struct dst_entry *dst); 10051da177e4SLinus Torvalds 100680c9abaaSShinta Sugimoto #ifdef CONFIG_XFRM_MIGRATE 100780c9abaaSShinta Sugimoto extern int km_migrate(struct xfrm_selector *sel, u8 dir, u8 type, 100880c9abaaSShinta Sugimoto struct xfrm_migrate *m, int num_bundles); 100980c9abaaSShinta Sugimoto extern struct xfrm_state * xfrm_migrate_state_find(struct xfrm_migrate *m); 101080c9abaaSShinta Sugimoto extern struct xfrm_state * xfrm_state_migrate(struct xfrm_state *x, 101180c9abaaSShinta Sugimoto struct xfrm_migrate *m); 101280c9abaaSShinta Sugimoto extern int xfrm_migrate(struct xfrm_selector *sel, u8 dir, u8 type, 101380c9abaaSShinta Sugimoto struct xfrm_migrate *m, int num_bundles); 101480c9abaaSShinta Sugimoto #endif 101580c9abaaSShinta Sugimoto 10161da177e4SLinus Torvalds extern wait_queue_head_t km_waitq; 10175d36b180SAl Viro extern int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); 10186c5c8ca7SJamal Hadi Salim extern void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 pid); 101997a64b45SMasahide NAKAMURA extern int km_report(u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr); 10201da177e4SLinus Torvalds 10211da177e4SLinus Torvalds extern void xfrm_input_init(void); 10226067b2baSAl Viro extern int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq); 10231da177e4SLinus Torvalds 10241da177e4SLinus Torvalds extern void xfrm_probe_algs(void); 10251da177e4SLinus Torvalds extern int xfrm_count_auth_supported(void); 10261da177e4SLinus Torvalds extern int xfrm_count_enc_supported(void); 10271da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx); 10281da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx); 10291da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id); 10301da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id); 10311da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id); 10321da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_aalg_get_byname(char *name, int probe); 10331da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_ealg_get_byname(char *name, int probe); 10341da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_calg_get_byname(char *name, int probe); 10351da177e4SLinus Torvalds 103607d4ee58SHerbert Xu struct hash_desc; 10379409f38aSHerbert Xu struct scatterlist; 103807d4ee58SHerbert Xu typedef int (icv_update_fn_t)(struct hash_desc *, struct scatterlist *, 103907d4ee58SHerbert Xu unsigned int); 10401da177e4SLinus Torvalds 104107d4ee58SHerbert Xu extern int skb_icv_walk(const struct sk_buff *skb, struct hash_desc *tfm, 10421da177e4SLinus Torvalds int offset, int len, icv_update_fn_t icv_update); 10431da177e4SLinus Torvalds 10441da177e4SLinus Torvalds static inline int xfrm_addr_cmp(xfrm_address_t *a, xfrm_address_t *b, 10451da177e4SLinus Torvalds int family) 10461da177e4SLinus Torvalds { 10471da177e4SLinus Torvalds switch (family) { 10481da177e4SLinus Torvalds default: 10491da177e4SLinus Torvalds case AF_INET: 10508c689a6eSAl Viro return (__force __u32)a->a4 - (__force __u32)b->a4; 10511da177e4SLinus Torvalds case AF_INET6: 10521da177e4SLinus Torvalds return ipv6_addr_cmp((struct in6_addr *)a, 10531da177e4SLinus Torvalds (struct in6_addr *)b); 10541da177e4SLinus Torvalds } 10551da177e4SLinus Torvalds } 10561da177e4SLinus Torvalds 105777d8d7a6SHerbert Xu static inline int xfrm_policy_id2dir(u32 index) 105877d8d7a6SHerbert Xu { 105977d8d7a6SHerbert Xu return index & 7; 106077d8d7a6SHerbert Xu } 106177d8d7a6SHerbert Xu 1062f8cd5488SJamal Hadi Salim static inline int xfrm_aevent_is_on(void) 1063f8cd5488SJamal Hadi Salim { 1064be33690dSPatrick McHardy struct sock *nlsk; 1065be33690dSPatrick McHardy int ret = 0; 1066be33690dSPatrick McHardy 1067be33690dSPatrick McHardy rcu_read_lock(); 1068be33690dSPatrick McHardy nlsk = rcu_dereference(xfrm_nl); 1069be33690dSPatrick McHardy if (nlsk) 1070be33690dSPatrick McHardy ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS); 1071be33690dSPatrick McHardy rcu_read_unlock(); 1072be33690dSPatrick McHardy return ret; 1073f8cd5488SJamal Hadi Salim } 1074f8cd5488SJamal Hadi Salim 1075f8cd5488SJamal Hadi Salim static inline void xfrm_aevent_doreplay(struct xfrm_state *x) 1076f8cd5488SJamal Hadi Salim { 1077f8cd5488SJamal Hadi Salim if (xfrm_aevent_is_on()) 1078f8cd5488SJamal Hadi Salim xfrm_replay_notify(x, XFRM_REPLAY_UPDATE); 1079f8cd5488SJamal Hadi Salim } 1080f8cd5488SJamal Hadi Salim 108180c9abaaSShinta Sugimoto #ifdef CONFIG_XFRM_MIGRATE 108280c9abaaSShinta Sugimoto static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig) 108380c9abaaSShinta Sugimoto { 108480c9abaaSShinta Sugimoto return (struct xfrm_algo *)kmemdup(orig, sizeof(*orig) + orig->alg_key_len, GFP_KERNEL); 108580c9abaaSShinta Sugimoto } 108680c9abaaSShinta Sugimoto 108780c9abaaSShinta Sugimoto static inline void xfrm_states_put(struct xfrm_state **states, int n) 108880c9abaaSShinta Sugimoto { 108980c9abaaSShinta Sugimoto int i; 109080c9abaaSShinta Sugimoto for (i = 0; i < n; i++) 109180c9abaaSShinta Sugimoto xfrm_state_put(*(states + i)); 109280c9abaaSShinta Sugimoto } 109380c9abaaSShinta Sugimoto 109480c9abaaSShinta Sugimoto static inline void xfrm_states_delete(struct xfrm_state **states, int n) 109580c9abaaSShinta Sugimoto { 109680c9abaaSShinta Sugimoto int i; 109780c9abaaSShinta Sugimoto for (i = 0; i < n; i++) 109880c9abaaSShinta Sugimoto xfrm_state_delete(*(states + i)); 109980c9abaaSShinta Sugimoto } 110080c9abaaSShinta Sugimoto #endif 1101f8cd5488SJamal Hadi Salim 11021da177e4SLinus Torvalds #endif /* _NET_XFRM_H */ 1103