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 */ 971da177e4SLinus Torvalds struct list_head bydst; 986c44e6b7SMasahide NAKAMURA struct list_head bysrc; 991da177e4SLinus Torvalds struct list_head 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 1071da177e4SLinus Torvalds /* Key manger bits */ 1081da177e4SLinus Torvalds struct { 1091da177e4SLinus Torvalds u8 state; 1101da177e4SLinus Torvalds u8 dying; 1111da177e4SLinus Torvalds u32 seq; 1121da177e4SLinus Torvalds } km; 1131da177e4SLinus Torvalds 1141da177e4SLinus Torvalds /* Parameters of this state. */ 1151da177e4SLinus Torvalds struct { 1161da177e4SLinus Torvalds u32 reqid; 1171da177e4SLinus Torvalds u8 mode; 1181da177e4SLinus Torvalds u8 replay_window; 1191da177e4SLinus Torvalds u8 aalgo, ealgo, calgo; 1201da177e4SLinus Torvalds u8 flags; 1211da177e4SLinus Torvalds u16 family; 1221da177e4SLinus Torvalds xfrm_address_t saddr; 1231da177e4SLinus Torvalds int header_len; 1241da177e4SLinus Torvalds int trailer_len; 1251da177e4SLinus Torvalds } props; 1261da177e4SLinus Torvalds 1271da177e4SLinus Torvalds struct xfrm_lifetime_cfg lft; 1281da177e4SLinus Torvalds 1291da177e4SLinus Torvalds /* Data for transformer */ 1301da177e4SLinus Torvalds struct xfrm_algo *aalg; 1311da177e4SLinus Torvalds struct xfrm_algo *ealg; 1321da177e4SLinus Torvalds struct xfrm_algo *calg; 1331da177e4SLinus Torvalds 1341da177e4SLinus Torvalds /* Data for encapsulator */ 1351da177e4SLinus Torvalds struct xfrm_encap_tmpl *encap; 1361da177e4SLinus Torvalds 1371da177e4SLinus Torvalds /* IPComp needs an IPIP tunnel for handling uncompressed packets */ 1381da177e4SLinus Torvalds struct xfrm_state *tunnel; 1391da177e4SLinus Torvalds 1401da177e4SLinus Torvalds /* If a tunnel, number of users + 1 */ 1411da177e4SLinus Torvalds atomic_t tunnel_users; 1421da177e4SLinus Torvalds 1431da177e4SLinus Torvalds /* State for replay detection */ 1441da177e4SLinus Torvalds struct xfrm_replay_state replay; 1451da177e4SLinus Torvalds 146f8cd5488SJamal Hadi Salim /* Replay detection state at the time we sent the last notification */ 147f8cd5488SJamal Hadi Salim struct xfrm_replay_state preplay; 148f8cd5488SJamal Hadi Salim 1492717096aSJamal Hadi Salim /* internal flag that only holds state for delayed aevent at the 1502717096aSJamal Hadi Salim * moment 1512717096aSJamal Hadi Salim */ 1522717096aSJamal Hadi Salim u32 xflags; 1532717096aSJamal Hadi Salim 154f8cd5488SJamal Hadi Salim /* Replay detection notification settings */ 155f8cd5488SJamal Hadi Salim u32 replay_maxage; 156f8cd5488SJamal Hadi Salim u32 replay_maxdiff; 157f8cd5488SJamal Hadi Salim 158f8cd5488SJamal Hadi Salim /* Replay detection notification timer */ 159f8cd5488SJamal Hadi Salim struct timer_list rtimer; 160f8cd5488SJamal Hadi Salim 1611da177e4SLinus Torvalds /* Statistics */ 1621da177e4SLinus Torvalds struct xfrm_stats stats; 1631da177e4SLinus Torvalds 1641da177e4SLinus Torvalds struct xfrm_lifetime_cur curlft; 1651da177e4SLinus Torvalds struct timer_list timer; 1661da177e4SLinus Torvalds 1671da177e4SLinus Torvalds /* Reference to data common to all the instances of this 1681da177e4SLinus Torvalds * transformer. */ 1691da177e4SLinus Torvalds struct xfrm_type *type; 170b59f45d0SHerbert Xu struct xfrm_mode *mode; 1711da177e4SLinus Torvalds 172df71837dSTrent Jaeger /* Security context */ 173df71837dSTrent Jaeger struct xfrm_sec_ctx *security; 174df71837dSTrent Jaeger 1751da177e4SLinus Torvalds /* Private data of this transformer, format is opaque, 1761da177e4SLinus Torvalds * interpreted by xfrm_type methods. */ 1771da177e4SLinus Torvalds void *data; 1781da177e4SLinus Torvalds }; 1791da177e4SLinus Torvalds 1802717096aSJamal Hadi Salim /* xflags - make enum if more show up */ 1812717096aSJamal Hadi Salim #define XFRM_TIME_DEFER 1 1822717096aSJamal Hadi Salim 1831da177e4SLinus Torvalds enum { 1841da177e4SLinus Torvalds XFRM_STATE_VOID, 1851da177e4SLinus Torvalds XFRM_STATE_ACQ, 1861da177e4SLinus Torvalds XFRM_STATE_VALID, 1871da177e4SLinus Torvalds XFRM_STATE_ERROR, 1881da177e4SLinus Torvalds XFRM_STATE_EXPIRED, 1891da177e4SLinus Torvalds XFRM_STATE_DEAD 1901da177e4SLinus Torvalds }; 1911da177e4SLinus Torvalds 19226b15dadSJamal Hadi Salim /* callback structure passed from either netlink or pfkey */ 19326b15dadSJamal Hadi Salim struct km_event 19426b15dadSJamal Hadi Salim { 195bf08867fSHerbert Xu union { 196bf08867fSHerbert Xu u32 hard; 197bf08867fSHerbert Xu u32 proto; 198bf08867fSHerbert Xu u32 byid; 199f8cd5488SJamal Hadi Salim u32 aevent; 200bf08867fSHerbert Xu } data; 201bf08867fSHerbert Xu 20226b15dadSJamal Hadi Salim u32 seq; 20326b15dadSJamal Hadi Salim u32 pid; 20426b15dadSJamal Hadi Salim u32 event; 20526b15dadSJamal Hadi Salim }; 20626b15dadSJamal Hadi Salim 2071da177e4SLinus Torvalds struct xfrm_type; 2081da177e4SLinus Torvalds struct xfrm_dst; 2091da177e4SLinus Torvalds struct xfrm_policy_afinfo { 2101da177e4SLinus Torvalds unsigned short family; 21173654d61SHerbert Xu struct xfrm_type *type_map[IPPROTO_MAX]; 212b59f45d0SHerbert Xu struct xfrm_mode *mode_map[XFRM_MODE_MAX]; 2131da177e4SLinus Torvalds struct dst_ops *dst_ops; 2141da177e4SLinus Torvalds void (*garbage_collect)(void); 2151da177e4SLinus Torvalds int (*dst_lookup)(struct xfrm_dst **dst, struct flowi *fl); 2161da177e4SLinus Torvalds struct dst_entry *(*find_bundle)(struct flowi *fl, struct xfrm_policy *policy); 2171da177e4SLinus Torvalds int (*bundle_create)(struct xfrm_policy *policy, 2181da177e4SLinus Torvalds struct xfrm_state **xfrm, 2191da177e4SLinus Torvalds int nx, 2201da177e4SLinus Torvalds struct flowi *fl, 2211da177e4SLinus Torvalds struct dst_entry **dst_p); 2221da177e4SLinus Torvalds void (*decode_session)(struct sk_buff *skb, 2231da177e4SLinus Torvalds struct flowi *fl); 2241da177e4SLinus Torvalds }; 2251da177e4SLinus Torvalds 2261da177e4SLinus Torvalds extern int xfrm_policy_register_afinfo(struct xfrm_policy_afinfo *afinfo); 2271da177e4SLinus Torvalds extern int xfrm_policy_unregister_afinfo(struct xfrm_policy_afinfo *afinfo); 22826b15dadSJamal Hadi Salim extern void km_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c); 22926b15dadSJamal Hadi Salim extern void km_state_notify(struct xfrm_state *x, struct km_event *c); 2301da177e4SLinus Torvalds #define XFRM_ACQ_EXPIRES 30 2311da177e4SLinus Torvalds 2321da177e4SLinus Torvalds struct xfrm_tmpl; 233980ebd25SJamal Hadi Salim extern int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol); 23453bc6b4dSJamal Hadi Salim extern void km_state_expired(struct xfrm_state *x, int hard, u32 pid); 23553bc6b4dSJamal Hadi Salim extern int __xfrm_state_delete(struct xfrm_state *x); 23653bc6b4dSJamal Hadi Salim 2371da177e4SLinus Torvalds struct xfrm_state_afinfo { 2381da177e4SLinus Torvalds unsigned short family; 2391da177e4SLinus Torvalds struct list_head *state_bydst; 2406c44e6b7SMasahide NAKAMURA struct list_head *state_bysrc; 2411da177e4SLinus Torvalds struct list_head *state_byspi; 242d094cd83SHerbert Xu int (*init_flags)(struct xfrm_state *x); 2431da177e4SLinus Torvalds void (*init_tempsel)(struct xfrm_state *x, struct flowi *fl, 2441da177e4SLinus Torvalds struct xfrm_tmpl *tmpl, 2451da177e4SLinus Torvalds xfrm_address_t *daddr, xfrm_address_t *saddr); 2461da177e4SLinus Torvalds struct xfrm_state *(*state_lookup)(xfrm_address_t *daddr, u32 spi, u8 proto); 247eb2971b6SMasahide NAKAMURA struct xfrm_state *(*state_lookup_byaddr)(xfrm_address_t *daddr, xfrm_address_t *saddr, u8 proto); 2481da177e4SLinus Torvalds struct xfrm_state *(*find_acq)(u8 mode, u32 reqid, u8 proto, 2491da177e4SLinus Torvalds xfrm_address_t *daddr, xfrm_address_t *saddr, 2501da177e4SLinus Torvalds int create); 2511da177e4SLinus Torvalds }; 2521da177e4SLinus Torvalds 2531da177e4SLinus Torvalds extern int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo); 2541da177e4SLinus Torvalds extern int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo); 2551da177e4SLinus Torvalds 2561da177e4SLinus Torvalds extern void xfrm_state_delete_tunnel(struct xfrm_state *x); 2571da177e4SLinus Torvalds 2581da177e4SLinus Torvalds struct xfrm_type 2591da177e4SLinus Torvalds { 2601da177e4SLinus Torvalds char *description; 2611da177e4SLinus Torvalds struct module *owner; 2621da177e4SLinus Torvalds __u8 proto; 2631da177e4SLinus Torvalds 26472cb6962SHerbert Xu int (*init_state)(struct xfrm_state *x); 2651da177e4SLinus Torvalds void (*destructor)(struct xfrm_state *); 266e695633eSHerbert Xu int (*input)(struct xfrm_state *, struct sk_buff *skb); 2671da177e4SLinus Torvalds int (*output)(struct xfrm_state *, struct sk_buff *pskb); 268aee5adb4SMasahide NAKAMURA int (*hdr_offset)(struct xfrm_state *, struct sk_buff *, u8 **); 2691da177e4SLinus Torvalds /* Estimate maximal size of result of transformation of a dgram */ 2701da177e4SLinus Torvalds u32 (*get_max_size)(struct xfrm_state *, int size); 2711da177e4SLinus Torvalds }; 2721da177e4SLinus Torvalds 2731da177e4SLinus Torvalds extern int xfrm_register_type(struct xfrm_type *type, unsigned short family); 2741da177e4SLinus Torvalds extern int xfrm_unregister_type(struct xfrm_type *type, unsigned short family); 2751da177e4SLinus Torvalds extern struct xfrm_type *xfrm_get_type(u8 proto, unsigned short family); 2761da177e4SLinus Torvalds extern void xfrm_put_type(struct xfrm_type *type); 2771da177e4SLinus Torvalds 278b59f45d0SHerbert Xu struct xfrm_mode { 279b59f45d0SHerbert Xu int (*input)(struct xfrm_state *x, struct sk_buff *skb); 280b59f45d0SHerbert Xu int (*output)(struct sk_buff *skb); 281b59f45d0SHerbert Xu 282b59f45d0SHerbert Xu struct module *owner; 283b59f45d0SHerbert Xu unsigned int encap; 284b59f45d0SHerbert Xu }; 285b59f45d0SHerbert Xu 286b59f45d0SHerbert Xu extern int xfrm_register_mode(struct xfrm_mode *mode, int family); 287b59f45d0SHerbert Xu extern int xfrm_unregister_mode(struct xfrm_mode *mode, int family); 288b59f45d0SHerbert Xu extern struct xfrm_mode *xfrm_get_mode(unsigned int encap, int family); 289b59f45d0SHerbert Xu extern void xfrm_put_mode(struct xfrm_mode *mode); 290b59f45d0SHerbert Xu 2911da177e4SLinus Torvalds struct xfrm_tmpl 2921da177e4SLinus Torvalds { 2931da177e4SLinus Torvalds /* id in template is interpreted as: 2941da177e4SLinus Torvalds * daddr - destination of tunnel, may be zero for transport mode. 2951da177e4SLinus Torvalds * spi - zero to acquire spi. Not zero if spi is static, then 2961da177e4SLinus Torvalds * daddr must be fixed too. 2971da177e4SLinus Torvalds * proto - AH/ESP/IPCOMP 2981da177e4SLinus Torvalds */ 2991da177e4SLinus Torvalds struct xfrm_id id; 3001da177e4SLinus Torvalds 3011da177e4SLinus Torvalds /* Source address of tunnel. Ignored, if it is not a tunnel. */ 3021da177e4SLinus Torvalds xfrm_address_t saddr; 3031da177e4SLinus Torvalds 3041da177e4SLinus Torvalds __u32 reqid; 3051da177e4SLinus Torvalds 3067e49e6deSMasahide NAKAMURA /* Mode: transport, tunnel etc. */ 3071da177e4SLinus Torvalds __u8 mode; 3081da177e4SLinus Torvalds 3091da177e4SLinus Torvalds /* Sharing mode: unique, this session only, this user only etc. */ 3101da177e4SLinus Torvalds __u8 share; 3111da177e4SLinus Torvalds 3121da177e4SLinus Torvalds /* May skip this transfomration if no SA is found */ 3131da177e4SLinus Torvalds __u8 optional; 3141da177e4SLinus Torvalds 3151da177e4SLinus Torvalds /* Bit mask of algos allowed for acquisition */ 3161da177e4SLinus Torvalds __u32 aalgos; 3171da177e4SLinus Torvalds __u32 ealgos; 3181da177e4SLinus Torvalds __u32 calgos; 3191da177e4SLinus Torvalds }; 3201da177e4SLinus Torvalds 321622dc828SMasahide NAKAMURA #define XFRM_MAX_DEPTH 6 3221da177e4SLinus Torvalds 3231da177e4SLinus Torvalds struct xfrm_policy 3241da177e4SLinus Torvalds { 3251da177e4SLinus Torvalds struct xfrm_policy *next; 3261da177e4SLinus Torvalds struct list_head list; 3271da177e4SLinus Torvalds 3281da177e4SLinus Torvalds /* This lock only affects elements except for entry. */ 3291da177e4SLinus Torvalds rwlock_t lock; 3301da177e4SLinus Torvalds atomic_t refcnt; 3311da177e4SLinus Torvalds struct timer_list timer; 3321da177e4SLinus Torvalds 3331da177e4SLinus Torvalds u32 priority; 3341da177e4SLinus Torvalds u32 index; 3351da177e4SLinus Torvalds struct xfrm_selector selector; 3361da177e4SLinus Torvalds struct xfrm_lifetime_cfg lft; 3371da177e4SLinus Torvalds struct xfrm_lifetime_cur curlft; 3381da177e4SLinus Torvalds struct dst_entry *bundles; 3391da177e4SLinus Torvalds __u16 family; 3401da177e4SLinus Torvalds __u8 action; 3411da177e4SLinus Torvalds __u8 flags; 3421da177e4SLinus Torvalds __u8 dead; 3431da177e4SLinus Torvalds __u8 xfrm_nr; 344df71837dSTrent Jaeger struct xfrm_sec_ctx *security; 3451da177e4SLinus Torvalds struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH]; 3461da177e4SLinus Torvalds }; 3471da177e4SLinus Torvalds 3481da177e4SLinus Torvalds #define XFRM_KM_TIMEOUT 30 349f8cd5488SJamal Hadi Salim /* which seqno */ 350f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_SEQ 1 351f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_OSEQ 2 352f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_SEQ_MASK 3 353f8cd5488SJamal Hadi Salim /* what happened */ 354f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_UPDATE XFRM_AE_CR 355f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_TIMEOUT XFRM_AE_CE 356f8cd5488SJamal Hadi Salim 357f8cd5488SJamal Hadi Salim /* default aevent timeout in units of 100ms */ 358f8cd5488SJamal Hadi Salim #define XFRM_AE_ETIME 10 359f8cd5488SJamal Hadi Salim /* Async Event timer multiplier */ 360f8cd5488SJamal Hadi Salim #define XFRM_AE_ETH_M 10 361f8cd5488SJamal Hadi Salim /* default seq threshold size */ 362f8cd5488SJamal Hadi Salim #define XFRM_AE_SEQT_SIZE 2 3631da177e4SLinus Torvalds 3641da177e4SLinus Torvalds struct xfrm_mgr 3651da177e4SLinus Torvalds { 3661da177e4SLinus Torvalds struct list_head list; 3671da177e4SLinus Torvalds char *id; 36826b15dadSJamal Hadi Salim int (*notify)(struct xfrm_state *x, struct km_event *c); 3691da177e4SLinus Torvalds int (*acquire)(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *xp, int dir); 370cb969f07SVenkat Yekkirala struct xfrm_policy *(*compile_policy)(struct sock *sk, int opt, u8 *data, int len, int *dir); 3711da177e4SLinus Torvalds int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, u16 sport); 37226b15dadSJamal Hadi Salim int (*notify_policy)(struct xfrm_policy *x, int dir, struct km_event *c); 3731da177e4SLinus Torvalds }; 3741da177e4SLinus Torvalds 3751da177e4SLinus Torvalds extern int xfrm_register_km(struct xfrm_mgr *km); 3761da177e4SLinus Torvalds extern int xfrm_unregister_km(struct xfrm_mgr *km); 3771da177e4SLinus Torvalds 3781da177e4SLinus Torvalds 3791da177e4SLinus Torvalds extern struct xfrm_policy *xfrm_policy_list[XFRM_POLICY_MAX*2]; 3801da177e4SLinus Torvalds 3811da177e4SLinus Torvalds static inline void xfrm_pol_hold(struct xfrm_policy *policy) 3821da177e4SLinus Torvalds { 3831da177e4SLinus Torvalds if (likely(policy != NULL)) 3841da177e4SLinus Torvalds atomic_inc(&policy->refcnt); 3851da177e4SLinus Torvalds } 3861da177e4SLinus Torvalds 3871da177e4SLinus Torvalds extern void __xfrm_policy_destroy(struct xfrm_policy *policy); 3881da177e4SLinus Torvalds 3891da177e4SLinus Torvalds static inline void xfrm_pol_put(struct xfrm_policy *policy) 3901da177e4SLinus Torvalds { 3911da177e4SLinus Torvalds if (atomic_dec_and_test(&policy->refcnt)) 3921da177e4SLinus Torvalds __xfrm_policy_destroy(policy); 3931da177e4SLinus Torvalds } 3941da177e4SLinus Torvalds 3951da177e4SLinus Torvalds #define XFRM_DST_HSIZE 1024 3961da177e4SLinus Torvalds 3971da177e4SLinus Torvalds static __inline__ 3981da177e4SLinus Torvalds unsigned __xfrm4_dst_hash(xfrm_address_t *addr) 3991da177e4SLinus Torvalds { 4001da177e4SLinus Torvalds unsigned h; 4011da177e4SLinus Torvalds h = ntohl(addr->a4); 4021da177e4SLinus Torvalds h = (h ^ (h>>16)) % XFRM_DST_HSIZE; 4031da177e4SLinus Torvalds return h; 4041da177e4SLinus Torvalds } 4051da177e4SLinus Torvalds 4061da177e4SLinus Torvalds static __inline__ 4071da177e4SLinus Torvalds unsigned __xfrm6_dst_hash(xfrm_address_t *addr) 4081da177e4SLinus Torvalds { 4091da177e4SLinus Torvalds unsigned h; 4101da177e4SLinus Torvalds h = ntohl(addr->a6[2]^addr->a6[3]); 4111da177e4SLinus Torvalds h = (h ^ (h>>16)) % XFRM_DST_HSIZE; 4121da177e4SLinus Torvalds return h; 4131da177e4SLinus Torvalds } 4141da177e4SLinus Torvalds 4151da177e4SLinus Torvalds static __inline__ 4161da177e4SLinus Torvalds unsigned xfrm_dst_hash(xfrm_address_t *addr, unsigned short family) 4171da177e4SLinus Torvalds { 4181da177e4SLinus Torvalds switch (family) { 4191da177e4SLinus Torvalds case AF_INET: 4201da177e4SLinus Torvalds return __xfrm4_dst_hash(addr); 4211da177e4SLinus Torvalds case AF_INET6: 4221da177e4SLinus Torvalds return __xfrm6_dst_hash(addr); 4231da177e4SLinus Torvalds } 4241da177e4SLinus Torvalds return 0; 4251da177e4SLinus Torvalds } 4261da177e4SLinus Torvalds 4271da177e4SLinus Torvalds static __inline__ 4286c44e6b7SMasahide NAKAMURA unsigned __xfrm4_src_hash(xfrm_address_t *addr) 4296c44e6b7SMasahide NAKAMURA { 4306c44e6b7SMasahide NAKAMURA return __xfrm4_dst_hash(addr); 4316c44e6b7SMasahide NAKAMURA } 4326c44e6b7SMasahide NAKAMURA 4336c44e6b7SMasahide NAKAMURA static __inline__ 4346c44e6b7SMasahide NAKAMURA unsigned __xfrm6_src_hash(xfrm_address_t *addr) 4356c44e6b7SMasahide NAKAMURA { 4366c44e6b7SMasahide NAKAMURA return __xfrm6_dst_hash(addr); 4376c44e6b7SMasahide NAKAMURA } 4386c44e6b7SMasahide NAKAMURA 4396c44e6b7SMasahide NAKAMURA static __inline__ 4406c44e6b7SMasahide NAKAMURA unsigned xfrm_src_hash(xfrm_address_t *addr, unsigned short family) 4416c44e6b7SMasahide NAKAMURA { 4426c44e6b7SMasahide NAKAMURA switch (family) { 4436c44e6b7SMasahide NAKAMURA case AF_INET: 4446c44e6b7SMasahide NAKAMURA return __xfrm4_src_hash(addr); 4456c44e6b7SMasahide NAKAMURA case AF_INET6: 4466c44e6b7SMasahide NAKAMURA return __xfrm6_src_hash(addr); 4476c44e6b7SMasahide NAKAMURA } 4486c44e6b7SMasahide NAKAMURA return 0; 4496c44e6b7SMasahide NAKAMURA } 4506c44e6b7SMasahide NAKAMURA 4516c44e6b7SMasahide NAKAMURA static __inline__ 4521da177e4SLinus Torvalds unsigned __xfrm4_spi_hash(xfrm_address_t *addr, u32 spi, u8 proto) 4531da177e4SLinus Torvalds { 4541da177e4SLinus Torvalds unsigned h; 4551da177e4SLinus Torvalds h = ntohl(addr->a4^spi^proto); 4561da177e4SLinus Torvalds h = (h ^ (h>>10) ^ (h>>20)) % XFRM_DST_HSIZE; 4571da177e4SLinus Torvalds return h; 4581da177e4SLinus Torvalds } 4591da177e4SLinus Torvalds 4601da177e4SLinus Torvalds static __inline__ 4611da177e4SLinus Torvalds unsigned __xfrm6_spi_hash(xfrm_address_t *addr, u32 spi, u8 proto) 4621da177e4SLinus Torvalds { 4631da177e4SLinus Torvalds unsigned h; 4641da177e4SLinus Torvalds h = ntohl(addr->a6[2]^addr->a6[3]^spi^proto); 4651da177e4SLinus Torvalds h = (h ^ (h>>10) ^ (h>>20)) % XFRM_DST_HSIZE; 4661da177e4SLinus Torvalds return h; 4671da177e4SLinus Torvalds } 4681da177e4SLinus Torvalds 4691da177e4SLinus Torvalds static __inline__ 4701da177e4SLinus Torvalds unsigned xfrm_spi_hash(xfrm_address_t *addr, u32 spi, u8 proto, unsigned short family) 4711da177e4SLinus Torvalds { 4721da177e4SLinus Torvalds switch (family) { 4731da177e4SLinus Torvalds case AF_INET: 4741da177e4SLinus Torvalds return __xfrm4_spi_hash(addr, spi, proto); 4751da177e4SLinus Torvalds case AF_INET6: 4761da177e4SLinus Torvalds return __xfrm6_spi_hash(addr, spi, proto); 4771da177e4SLinus Torvalds } 4781da177e4SLinus Torvalds return 0; /*XXX*/ 4791da177e4SLinus Torvalds } 4801da177e4SLinus Torvalds 4811da177e4SLinus Torvalds extern void __xfrm_state_destroy(struct xfrm_state *); 4821da177e4SLinus Torvalds 48321380b81SHerbert Xu static inline void __xfrm_state_put(struct xfrm_state *x) 48421380b81SHerbert Xu { 48521380b81SHerbert Xu atomic_dec(&x->refcnt); 48621380b81SHerbert Xu } 48721380b81SHerbert Xu 4881da177e4SLinus Torvalds static inline void xfrm_state_put(struct xfrm_state *x) 4891da177e4SLinus Torvalds { 4901da177e4SLinus Torvalds if (atomic_dec_and_test(&x->refcnt)) 4911da177e4SLinus Torvalds __xfrm_state_destroy(x); 4921da177e4SLinus Torvalds } 4931da177e4SLinus Torvalds 4941da177e4SLinus Torvalds static inline void xfrm_state_hold(struct xfrm_state *x) 4951da177e4SLinus Torvalds { 4961da177e4SLinus Torvalds atomic_inc(&x->refcnt); 4971da177e4SLinus Torvalds } 4981da177e4SLinus Torvalds 4991da177e4SLinus Torvalds static __inline__ int addr_match(void *token1, void *token2, int prefixlen) 5001da177e4SLinus Torvalds { 5011da177e4SLinus Torvalds __u32 *a1 = token1; 5021da177e4SLinus Torvalds __u32 *a2 = token2; 5031da177e4SLinus Torvalds int pdw; 5041da177e4SLinus Torvalds int pbi; 5051da177e4SLinus Torvalds 5061da177e4SLinus Torvalds pdw = prefixlen >> 5; /* num of whole __u32 in prefix */ 5071da177e4SLinus Torvalds pbi = prefixlen & 0x1f; /* num of bits in incomplete u32 in prefix */ 5081da177e4SLinus Torvalds 5091da177e4SLinus Torvalds if (pdw) 5101da177e4SLinus Torvalds if (memcmp(a1, a2, pdw << 2)) 5111da177e4SLinus Torvalds return 0; 5121da177e4SLinus Torvalds 5131da177e4SLinus Torvalds if (pbi) { 5141da177e4SLinus Torvalds __u32 mask; 5151da177e4SLinus Torvalds 5161da177e4SLinus Torvalds mask = htonl((0xffffffff) << (32 - pbi)); 5171da177e4SLinus Torvalds 5181da177e4SLinus Torvalds if ((a1[pdw] ^ a2[pdw]) & mask) 5191da177e4SLinus Torvalds return 0; 5201da177e4SLinus Torvalds } 5211da177e4SLinus Torvalds 5221da177e4SLinus Torvalds return 1; 5231da177e4SLinus Torvalds } 5241da177e4SLinus Torvalds 5251da177e4SLinus Torvalds static __inline__ 5261da177e4SLinus Torvalds u16 xfrm_flowi_sport(struct flowi *fl) 5271da177e4SLinus Torvalds { 5281da177e4SLinus Torvalds u16 port; 5291da177e4SLinus Torvalds switch(fl->proto) { 5301da177e4SLinus Torvalds case IPPROTO_TCP: 5311da177e4SLinus Torvalds case IPPROTO_UDP: 5321da177e4SLinus Torvalds case IPPROTO_SCTP: 5331da177e4SLinus Torvalds port = fl->fl_ip_sport; 5341da177e4SLinus Torvalds break; 5351da177e4SLinus Torvalds case IPPROTO_ICMP: 5361da177e4SLinus Torvalds case IPPROTO_ICMPV6: 5371da177e4SLinus Torvalds port = htons(fl->fl_icmp_type); 5381da177e4SLinus Torvalds break; 5391da177e4SLinus Torvalds default: 5401da177e4SLinus Torvalds port = 0; /*XXX*/ 5411da177e4SLinus Torvalds } 5421da177e4SLinus Torvalds return port; 5431da177e4SLinus Torvalds } 5441da177e4SLinus Torvalds 5451da177e4SLinus Torvalds static __inline__ 5461da177e4SLinus Torvalds u16 xfrm_flowi_dport(struct flowi *fl) 5471da177e4SLinus Torvalds { 5481da177e4SLinus Torvalds u16 port; 5491da177e4SLinus Torvalds switch(fl->proto) { 5501da177e4SLinus Torvalds case IPPROTO_TCP: 5511da177e4SLinus Torvalds case IPPROTO_UDP: 5521da177e4SLinus Torvalds case IPPROTO_SCTP: 5531da177e4SLinus Torvalds port = fl->fl_ip_dport; 5541da177e4SLinus Torvalds break; 5551da177e4SLinus Torvalds case IPPROTO_ICMP: 5561da177e4SLinus Torvalds case IPPROTO_ICMPV6: 5571da177e4SLinus Torvalds port = htons(fl->fl_icmp_code); 5581da177e4SLinus Torvalds break; 5591da177e4SLinus Torvalds default: 5601da177e4SLinus Torvalds port = 0; /*XXX*/ 5611da177e4SLinus Torvalds } 5621da177e4SLinus Torvalds return port; 5631da177e4SLinus Torvalds } 5641da177e4SLinus Torvalds 5651da177e4SLinus Torvalds static inline int 5661da177e4SLinus Torvalds __xfrm4_selector_match(struct xfrm_selector *sel, struct flowi *fl) 5671da177e4SLinus Torvalds { 5681da177e4SLinus Torvalds return addr_match(&fl->fl4_dst, &sel->daddr, sel->prefixlen_d) && 5691da177e4SLinus Torvalds addr_match(&fl->fl4_src, &sel->saddr, sel->prefixlen_s) && 5701da177e4SLinus Torvalds !((xfrm_flowi_dport(fl) ^ sel->dport) & sel->dport_mask) && 5711da177e4SLinus Torvalds !((xfrm_flowi_sport(fl) ^ sel->sport) & sel->sport_mask) && 5721da177e4SLinus Torvalds (fl->proto == sel->proto || !sel->proto) && 5731da177e4SLinus Torvalds (fl->oif == sel->ifindex || !sel->ifindex); 5741da177e4SLinus Torvalds } 5751da177e4SLinus Torvalds 5761da177e4SLinus Torvalds static inline int 5771da177e4SLinus Torvalds __xfrm6_selector_match(struct xfrm_selector *sel, struct flowi *fl) 5781da177e4SLinus Torvalds { 5791da177e4SLinus Torvalds return addr_match(&fl->fl6_dst, &sel->daddr, sel->prefixlen_d) && 5801da177e4SLinus Torvalds addr_match(&fl->fl6_src, &sel->saddr, sel->prefixlen_s) && 5811da177e4SLinus Torvalds !((xfrm_flowi_dport(fl) ^ sel->dport) & sel->dport_mask) && 5821da177e4SLinus Torvalds !((xfrm_flowi_sport(fl) ^ sel->sport) & sel->sport_mask) && 5831da177e4SLinus Torvalds (fl->proto == sel->proto || !sel->proto) && 5841da177e4SLinus Torvalds (fl->oif == sel->ifindex || !sel->ifindex); 5851da177e4SLinus Torvalds } 5861da177e4SLinus Torvalds 5871da177e4SLinus Torvalds static inline int 5881da177e4SLinus Torvalds xfrm_selector_match(struct xfrm_selector *sel, struct flowi *fl, 5891da177e4SLinus Torvalds unsigned short family) 5901da177e4SLinus Torvalds { 5911da177e4SLinus Torvalds switch (family) { 5921da177e4SLinus Torvalds case AF_INET: 5931da177e4SLinus Torvalds return __xfrm4_selector_match(sel, fl); 5941da177e4SLinus Torvalds case AF_INET6: 5951da177e4SLinus Torvalds return __xfrm6_selector_match(sel, fl); 5961da177e4SLinus Torvalds } 5971da177e4SLinus Torvalds return 0; 5981da177e4SLinus Torvalds } 5991da177e4SLinus Torvalds 600df71837dSTrent Jaeger #ifdef CONFIG_SECURITY_NETWORK_XFRM 601df71837dSTrent Jaeger /* If neither has a context --> match 602df71837dSTrent Jaeger * Otherwise, both must have a context and the sids, doi, alg must match 603df71837dSTrent Jaeger */ 604df71837dSTrent Jaeger static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) 605df71837dSTrent Jaeger { 606df71837dSTrent Jaeger return ((!s1 && !s2) || 607df71837dSTrent Jaeger (s1 && s2 && 608df71837dSTrent Jaeger (s1->ctx_sid == s2->ctx_sid) && 609df71837dSTrent Jaeger (s1->ctx_doi == s2->ctx_doi) && 610df71837dSTrent Jaeger (s1->ctx_alg == s2->ctx_alg))); 611df71837dSTrent Jaeger } 612df71837dSTrent Jaeger #else 613df71837dSTrent Jaeger static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) 614df71837dSTrent Jaeger { 615df71837dSTrent Jaeger return 1; 616df71837dSTrent Jaeger } 617df71837dSTrent Jaeger #endif 618df71837dSTrent Jaeger 6191da177e4SLinus Torvalds /* A struct encoding bundle of transformations to apply to some set of flow. 6201da177e4SLinus Torvalds * 6211da177e4SLinus Torvalds * dst->child points to the next element of bundle. 6221da177e4SLinus Torvalds * dst->xfrm points to an instanse of transformer. 6231da177e4SLinus Torvalds * 6241da177e4SLinus Torvalds * Due to unfortunate limitations of current routing cache, which we 6251da177e4SLinus Torvalds * have no time to fix, it mirrors struct rtable and bound to the same 6261da177e4SLinus Torvalds * routing key, including saddr,daddr. However, we can have many of 6271da177e4SLinus Torvalds * bundles differing by session id. All the bundles grow from a parent 6281da177e4SLinus Torvalds * policy rule. 6291da177e4SLinus Torvalds */ 6301da177e4SLinus Torvalds struct xfrm_dst 6311da177e4SLinus Torvalds { 6321da177e4SLinus Torvalds union { 6331da177e4SLinus Torvalds struct xfrm_dst *next; 6341da177e4SLinus Torvalds struct dst_entry dst; 6351da177e4SLinus Torvalds struct rtable rt; 6361da177e4SLinus Torvalds struct rt6_info rt6; 6371da177e4SLinus Torvalds } u; 6381da177e4SLinus Torvalds struct dst_entry *route; 6391da177e4SLinus Torvalds u32 route_mtu_cached; 6401da177e4SLinus Torvalds u32 child_mtu_cached; 64192d63decSHideaki YOSHIFUJI u32 route_cookie; 64292d63decSHideaki YOSHIFUJI u32 path_cookie; 6431da177e4SLinus Torvalds }; 6441da177e4SLinus Torvalds 645aabc9761SHerbert Xu static inline void xfrm_dst_destroy(struct xfrm_dst *xdst) 646aabc9761SHerbert Xu { 647aabc9761SHerbert Xu dst_release(xdst->route); 648aabc9761SHerbert Xu if (likely(xdst->u.dst.xfrm)) 649aabc9761SHerbert Xu xfrm_state_put(xdst->u.dst.xfrm); 650aabc9761SHerbert Xu } 651aabc9761SHerbert Xu 652aabc9761SHerbert Xu extern void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev); 653aabc9761SHerbert Xu 6541da177e4SLinus Torvalds struct sec_path 6551da177e4SLinus Torvalds { 6561da177e4SLinus Torvalds atomic_t refcnt; 6571da177e4SLinus Torvalds int len; 658dbe5b4aaSHerbert Xu struct xfrm_state *xvec[XFRM_MAX_DEPTH]; 6591da177e4SLinus Torvalds }; 6601da177e4SLinus Torvalds 6611da177e4SLinus Torvalds static inline struct sec_path * 6621da177e4SLinus Torvalds secpath_get(struct sec_path *sp) 6631da177e4SLinus Torvalds { 6641da177e4SLinus Torvalds if (sp) 6651da177e4SLinus Torvalds atomic_inc(&sp->refcnt); 6661da177e4SLinus Torvalds return sp; 6671da177e4SLinus Torvalds } 6681da177e4SLinus Torvalds 6691da177e4SLinus Torvalds extern void __secpath_destroy(struct sec_path *sp); 6701da177e4SLinus Torvalds 6711da177e4SLinus Torvalds static inline void 6721da177e4SLinus Torvalds secpath_put(struct sec_path *sp) 6731da177e4SLinus Torvalds { 6741da177e4SLinus Torvalds if (sp && atomic_dec_and_test(&sp->refcnt)) 6751da177e4SLinus Torvalds __secpath_destroy(sp); 6761da177e4SLinus Torvalds } 6771da177e4SLinus Torvalds 6781da177e4SLinus Torvalds extern struct sec_path *secpath_dup(struct sec_path *src); 6791da177e4SLinus Torvalds 6801da177e4SLinus Torvalds static inline void 6811da177e4SLinus Torvalds secpath_reset(struct sk_buff *skb) 6821da177e4SLinus Torvalds { 6831da177e4SLinus Torvalds #ifdef CONFIG_XFRM 6841da177e4SLinus Torvalds secpath_put(skb->sp); 6851da177e4SLinus Torvalds skb->sp = NULL; 6861da177e4SLinus Torvalds #endif 6871da177e4SLinus Torvalds } 6881da177e4SLinus Torvalds 6891da177e4SLinus Torvalds static inline int 6901da177e4SLinus Torvalds __xfrm4_state_addr_cmp(struct xfrm_tmpl *tmpl, struct xfrm_state *x) 6911da177e4SLinus Torvalds { 6921da177e4SLinus Torvalds return (tmpl->saddr.a4 && 6931da177e4SLinus Torvalds tmpl->saddr.a4 != x->props.saddr.a4); 6941da177e4SLinus Torvalds } 6951da177e4SLinus Torvalds 6961da177e4SLinus Torvalds static inline int 6971da177e4SLinus Torvalds __xfrm6_state_addr_cmp(struct xfrm_tmpl *tmpl, struct xfrm_state *x) 6981da177e4SLinus Torvalds { 6991da177e4SLinus Torvalds return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) && 7001da177e4SLinus Torvalds ipv6_addr_cmp((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr)); 7011da177e4SLinus Torvalds } 7021da177e4SLinus Torvalds 7031da177e4SLinus Torvalds static inline int 7041da177e4SLinus Torvalds xfrm_state_addr_cmp(struct xfrm_tmpl *tmpl, struct xfrm_state *x, unsigned short family) 7051da177e4SLinus Torvalds { 7061da177e4SLinus Torvalds switch (family) { 7071da177e4SLinus Torvalds case AF_INET: 7081da177e4SLinus Torvalds return __xfrm4_state_addr_cmp(tmpl, x); 7091da177e4SLinus Torvalds case AF_INET6: 7101da177e4SLinus Torvalds return __xfrm6_state_addr_cmp(tmpl, x); 7111da177e4SLinus Torvalds } 7121da177e4SLinus Torvalds return !0; 7131da177e4SLinus Torvalds } 7141da177e4SLinus Torvalds 7151da177e4SLinus Torvalds #ifdef CONFIG_XFRM 7161da177e4SLinus Torvalds 7171da177e4SLinus Torvalds extern int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb, unsigned short family); 7181da177e4SLinus Torvalds 7191da177e4SLinus Torvalds static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) 7201da177e4SLinus Torvalds { 7211da177e4SLinus Torvalds if (sk && sk->sk_policy[XFRM_POLICY_IN]) 7221da177e4SLinus Torvalds return __xfrm_policy_check(sk, dir, skb, family); 7231da177e4SLinus Torvalds 7241da177e4SLinus Torvalds return (!xfrm_policy_list[dir] && !skb->sp) || 7251da177e4SLinus Torvalds (skb->dst->flags & DST_NOPOLICY) || 7261da177e4SLinus Torvalds __xfrm_policy_check(sk, dir, skb, family); 7271da177e4SLinus Torvalds } 7281da177e4SLinus Torvalds 7291da177e4SLinus Torvalds static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 7301da177e4SLinus Torvalds { 7311da177e4SLinus Torvalds return xfrm_policy_check(sk, dir, skb, AF_INET); 7321da177e4SLinus Torvalds } 7331da177e4SLinus Torvalds 7341da177e4SLinus Torvalds static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 7351da177e4SLinus Torvalds { 7361da177e4SLinus Torvalds return xfrm_policy_check(sk, dir, skb, AF_INET6); 7371da177e4SLinus Torvalds } 7381da177e4SLinus Torvalds 7393e3850e9SPatrick McHardy extern int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, unsigned short family); 7401da177e4SLinus Torvalds extern int __xfrm_route_forward(struct sk_buff *skb, unsigned short family); 7411da177e4SLinus Torvalds 7421da177e4SLinus Torvalds static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family) 7431da177e4SLinus Torvalds { 7441da177e4SLinus Torvalds return !xfrm_policy_list[XFRM_POLICY_OUT] || 7451da177e4SLinus Torvalds (skb->dst->flags & DST_NOXFRM) || 7461da177e4SLinus Torvalds __xfrm_route_forward(skb, family); 7471da177e4SLinus Torvalds } 7481da177e4SLinus Torvalds 7491da177e4SLinus Torvalds static inline int xfrm4_route_forward(struct sk_buff *skb) 7501da177e4SLinus Torvalds { 7511da177e4SLinus Torvalds return xfrm_route_forward(skb, AF_INET); 7521da177e4SLinus Torvalds } 7531da177e4SLinus Torvalds 7541da177e4SLinus Torvalds static inline int xfrm6_route_forward(struct sk_buff *skb) 7551da177e4SLinus Torvalds { 7561da177e4SLinus Torvalds return xfrm_route_forward(skb, AF_INET6); 7571da177e4SLinus Torvalds } 7581da177e4SLinus Torvalds 7591da177e4SLinus Torvalds extern int __xfrm_sk_clone_policy(struct sock *sk); 7601da177e4SLinus Torvalds 7611da177e4SLinus Torvalds static inline int xfrm_sk_clone_policy(struct sock *sk) 7621da177e4SLinus Torvalds { 7631da177e4SLinus Torvalds if (unlikely(sk->sk_policy[0] || sk->sk_policy[1])) 7641da177e4SLinus Torvalds return __xfrm_sk_clone_policy(sk); 7651da177e4SLinus Torvalds return 0; 7661da177e4SLinus Torvalds } 7671da177e4SLinus Torvalds 7684666faabSHerbert Xu extern int xfrm_policy_delete(struct xfrm_policy *pol, int dir); 7691da177e4SLinus Torvalds 7701da177e4SLinus Torvalds static inline void xfrm_sk_free_policy(struct sock *sk) 7711da177e4SLinus Torvalds { 7721da177e4SLinus Torvalds if (unlikely(sk->sk_policy[0] != NULL)) { 7731da177e4SLinus Torvalds xfrm_policy_delete(sk->sk_policy[0], XFRM_POLICY_MAX); 7741da177e4SLinus Torvalds sk->sk_policy[0] = NULL; 7751da177e4SLinus Torvalds } 7761da177e4SLinus Torvalds if (unlikely(sk->sk_policy[1] != NULL)) { 7771da177e4SLinus Torvalds xfrm_policy_delete(sk->sk_policy[1], XFRM_POLICY_MAX+1); 7781da177e4SLinus Torvalds sk->sk_policy[1] = NULL; 7791da177e4SLinus Torvalds } 7801da177e4SLinus Torvalds } 7811da177e4SLinus Torvalds 7821da177e4SLinus Torvalds #else 7831da177e4SLinus Torvalds 7841da177e4SLinus Torvalds static inline void xfrm_sk_free_policy(struct sock *sk) {} 7851da177e4SLinus Torvalds static inline int xfrm_sk_clone_policy(struct sock *sk) { return 0; } 7861da177e4SLinus Torvalds static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; } 7871da177e4SLinus Torvalds static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; } 7881da177e4SLinus Torvalds static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 7891da177e4SLinus Torvalds { 7901da177e4SLinus Torvalds return 1; 7911da177e4SLinus Torvalds } 7921da177e4SLinus Torvalds static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 7931da177e4SLinus Torvalds { 7941da177e4SLinus Torvalds return 1; 7951da177e4SLinus Torvalds } 7961da177e4SLinus Torvalds static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) 7971da177e4SLinus Torvalds { 7981da177e4SLinus Torvalds return 1; 7991da177e4SLinus Torvalds } 8001da177e4SLinus Torvalds #endif 8011da177e4SLinus Torvalds 8021da177e4SLinus Torvalds static __inline__ 8031da177e4SLinus Torvalds xfrm_address_t *xfrm_flowi_daddr(struct flowi *fl, unsigned short family) 8041da177e4SLinus Torvalds { 8051da177e4SLinus Torvalds switch (family){ 8061da177e4SLinus Torvalds case AF_INET: 8071da177e4SLinus Torvalds return (xfrm_address_t *)&fl->fl4_dst; 8081da177e4SLinus Torvalds case AF_INET6: 8091da177e4SLinus Torvalds return (xfrm_address_t *)&fl->fl6_dst; 8101da177e4SLinus Torvalds } 8111da177e4SLinus Torvalds return NULL; 8121da177e4SLinus Torvalds } 8131da177e4SLinus Torvalds 8141da177e4SLinus Torvalds static __inline__ 8151da177e4SLinus Torvalds xfrm_address_t *xfrm_flowi_saddr(struct flowi *fl, unsigned short family) 8161da177e4SLinus Torvalds { 8171da177e4SLinus Torvalds switch (family){ 8181da177e4SLinus Torvalds case AF_INET: 8191da177e4SLinus Torvalds return (xfrm_address_t *)&fl->fl4_src; 8201da177e4SLinus Torvalds case AF_INET6: 8211da177e4SLinus Torvalds return (xfrm_address_t *)&fl->fl6_src; 8221da177e4SLinus Torvalds } 8231da177e4SLinus Torvalds return NULL; 8241da177e4SLinus Torvalds } 8251da177e4SLinus Torvalds 8261da177e4SLinus Torvalds static __inline__ int 8271da177e4SLinus Torvalds __xfrm4_state_addr_check(struct xfrm_state *x, 8281da177e4SLinus Torvalds xfrm_address_t *daddr, xfrm_address_t *saddr) 8291da177e4SLinus Torvalds { 8301da177e4SLinus Torvalds if (daddr->a4 == x->id.daddr.a4 && 8311da177e4SLinus Torvalds (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4)) 8321da177e4SLinus Torvalds return 1; 8331da177e4SLinus Torvalds return 0; 8341da177e4SLinus Torvalds } 8351da177e4SLinus Torvalds 8361da177e4SLinus Torvalds static __inline__ int 8371da177e4SLinus Torvalds __xfrm6_state_addr_check(struct xfrm_state *x, 8381da177e4SLinus Torvalds xfrm_address_t *daddr, xfrm_address_t *saddr) 8391da177e4SLinus Torvalds { 8401da177e4SLinus Torvalds if (!ipv6_addr_cmp((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) && 8411da177e4SLinus Torvalds (!ipv6_addr_cmp((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr)|| 8421da177e4SLinus Torvalds ipv6_addr_any((struct in6_addr *)saddr) || 8431da177e4SLinus Torvalds ipv6_addr_any((struct in6_addr *)&x->props.saddr))) 8441da177e4SLinus Torvalds return 1; 8451da177e4SLinus Torvalds return 0; 8461da177e4SLinus Torvalds } 8471da177e4SLinus Torvalds 8481da177e4SLinus Torvalds static __inline__ int 8491da177e4SLinus Torvalds xfrm_state_addr_check(struct xfrm_state *x, 8501da177e4SLinus Torvalds xfrm_address_t *daddr, xfrm_address_t *saddr, 8511da177e4SLinus Torvalds unsigned short family) 8521da177e4SLinus Torvalds { 8531da177e4SLinus Torvalds switch (family) { 8541da177e4SLinus Torvalds case AF_INET: 8551da177e4SLinus Torvalds return __xfrm4_state_addr_check(x, daddr, saddr); 8561da177e4SLinus Torvalds case AF_INET6: 8571da177e4SLinus Torvalds return __xfrm6_state_addr_check(x, daddr, saddr); 8581da177e4SLinus Torvalds } 8591da177e4SLinus Torvalds return 0; 8601da177e4SLinus Torvalds } 8611da177e4SLinus Torvalds 8621da177e4SLinus Torvalds static inline int xfrm_state_kern(struct xfrm_state *x) 8631da177e4SLinus Torvalds { 8641da177e4SLinus Torvalds return atomic_read(&x->tunnel_users); 8651da177e4SLinus Torvalds } 8661da177e4SLinus Torvalds 8675794708fSMasahide NAKAMURA static inline int xfrm_id_proto_match(u8 proto, u8 userproto) 8685794708fSMasahide NAKAMURA { 869dc00a525SMasahide NAKAMURA return (!userproto || proto == userproto || 870dc00a525SMasahide NAKAMURA (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH || 871dc00a525SMasahide NAKAMURA proto == IPPROTO_ESP || 872dc00a525SMasahide NAKAMURA proto == IPPROTO_COMP))); 8735794708fSMasahide NAKAMURA } 8745794708fSMasahide NAKAMURA 8751da177e4SLinus Torvalds /* 8761da177e4SLinus Torvalds * xfrm algorithm information 8771da177e4SLinus Torvalds */ 8781da177e4SLinus Torvalds struct xfrm_algo_auth_info { 8791da177e4SLinus Torvalds u16 icv_truncbits; 8801da177e4SLinus Torvalds u16 icv_fullbits; 8811da177e4SLinus Torvalds }; 8821da177e4SLinus Torvalds 8831da177e4SLinus Torvalds struct xfrm_algo_encr_info { 8841da177e4SLinus Torvalds u16 blockbits; 8851da177e4SLinus Torvalds u16 defkeybits; 8861da177e4SLinus Torvalds }; 8871da177e4SLinus Torvalds 8881da177e4SLinus Torvalds struct xfrm_algo_comp_info { 8891da177e4SLinus Torvalds u16 threshold; 8901da177e4SLinus Torvalds }; 8911da177e4SLinus Torvalds 8921da177e4SLinus Torvalds struct xfrm_algo_desc { 8931da177e4SLinus Torvalds char *name; 89404ff1260SHerbert Xu char *compat; 8951da177e4SLinus Torvalds u8 available:1; 8961da177e4SLinus Torvalds union { 8971da177e4SLinus Torvalds struct xfrm_algo_auth_info auth; 8981da177e4SLinus Torvalds struct xfrm_algo_encr_info encr; 8991da177e4SLinus Torvalds struct xfrm_algo_comp_info comp; 9001da177e4SLinus Torvalds } uinfo; 9011da177e4SLinus Torvalds struct sadb_alg desc; 9021da177e4SLinus Torvalds }; 9031da177e4SLinus Torvalds 9041da177e4SLinus Torvalds /* XFRM tunnel handlers. */ 9051da177e4SLinus Torvalds struct xfrm_tunnel { 9061da177e4SLinus Torvalds int (*handler)(struct sk_buff *skb); 907d2acc347SHerbert Xu int (*err_handler)(struct sk_buff *skb, __u32 info); 908d2acc347SHerbert Xu 909d2acc347SHerbert Xu struct xfrm_tunnel *next; 910d2acc347SHerbert Xu int priority; 9111da177e4SLinus Torvalds }; 9121da177e4SLinus Torvalds 9131da177e4SLinus Torvalds struct xfrm6_tunnel { 914d2acc347SHerbert Xu int (*handler)(struct sk_buff *skb); 915d2acc347SHerbert Xu int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt, 9161da177e4SLinus Torvalds int type, int code, int offset, __u32 info); 917d2acc347SHerbert Xu 918d2acc347SHerbert Xu struct xfrm6_tunnel *next; 919d2acc347SHerbert Xu int priority; 9201da177e4SLinus Torvalds }; 9211da177e4SLinus Torvalds 9221da177e4SLinus Torvalds extern void xfrm_init(void); 9231da177e4SLinus Torvalds extern void xfrm4_init(void); 9241da177e4SLinus Torvalds extern void xfrm6_init(void); 9251da177e4SLinus Torvalds extern void xfrm6_fini(void); 9261da177e4SLinus Torvalds extern void xfrm_state_init(void); 9271da177e4SLinus Torvalds extern void xfrm4_state_init(void); 9281da177e4SLinus Torvalds extern void xfrm6_state_init(void); 9291da177e4SLinus Torvalds extern void xfrm6_state_fini(void); 9301da177e4SLinus Torvalds 9311da177e4SLinus Torvalds extern int xfrm_state_walk(u8 proto, int (*func)(struct xfrm_state *, int, void*), void *); 9321da177e4SLinus Torvalds extern struct xfrm_state *xfrm_state_alloc(void); 9331da177e4SLinus Torvalds extern struct xfrm_state *xfrm_state_find(xfrm_address_t *daddr, xfrm_address_t *saddr, 9341da177e4SLinus Torvalds struct flowi *fl, struct xfrm_tmpl *tmpl, 9351da177e4SLinus Torvalds struct xfrm_policy *pol, int *err, 9361da177e4SLinus Torvalds unsigned short family); 9371da177e4SLinus Torvalds extern int xfrm_state_check_expire(struct xfrm_state *x); 9381da177e4SLinus Torvalds extern void xfrm_state_insert(struct xfrm_state *x); 9391da177e4SLinus Torvalds extern int xfrm_state_add(struct xfrm_state *x); 9401da177e4SLinus Torvalds extern int xfrm_state_update(struct xfrm_state *x); 9411da177e4SLinus Torvalds extern struct xfrm_state *xfrm_state_lookup(xfrm_address_t *daddr, u32 spi, u8 proto, unsigned short family); 942eb2971b6SMasahide NAKAMURA extern struct xfrm_state *xfrm_state_lookup_byaddr(xfrm_address_t *daddr, xfrm_address_t *saddr, u8 proto, unsigned short family); 9431da177e4SLinus Torvalds extern struct xfrm_state *xfrm_find_acq_byseq(u32 seq); 94426b15dadSJamal Hadi Salim extern int xfrm_state_delete(struct xfrm_state *x); 9451da177e4SLinus Torvalds extern void xfrm_state_flush(u8 proto); 9461da177e4SLinus Torvalds extern int xfrm_replay_check(struct xfrm_state *x, u32 seq); 9471da177e4SLinus Torvalds extern void xfrm_replay_advance(struct xfrm_state *x, u32 seq); 948f8cd5488SJamal Hadi Salim extern void xfrm_replay_notify(struct xfrm_state *x, int event); 9491da177e4SLinus Torvalds extern int xfrm_state_check(struct xfrm_state *x, struct sk_buff *skb); 9501da177e4SLinus Torvalds extern int xfrm_state_mtu(struct xfrm_state *x, int mtu); 95172cb6962SHerbert Xu extern int xfrm_init_state(struct xfrm_state *x); 9521da177e4SLinus Torvalds extern int xfrm4_rcv(struct sk_buff *skb); 9531da177e4SLinus Torvalds extern int xfrm4_output(struct sk_buff *skb); 9541da177e4SLinus Torvalds extern int xfrm4_tunnel_register(struct xfrm_tunnel *handler); 9551da177e4SLinus Torvalds extern int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler); 956d2acc347SHerbert Xu extern int xfrm6_rcv_spi(struct sk_buff *skb, u32 spi); 957951dbc8aSPatrick McHardy extern int xfrm6_rcv(struct sk_buff **pskb); 9581da177e4SLinus Torvalds extern int xfrm6_tunnel_register(struct xfrm6_tunnel *handler); 9591da177e4SLinus Torvalds extern int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler); 9601da177e4SLinus Torvalds extern u32 xfrm6_tunnel_alloc_spi(xfrm_address_t *saddr); 9611da177e4SLinus Torvalds extern void xfrm6_tunnel_free_spi(xfrm_address_t *saddr); 9621da177e4SLinus Torvalds extern u32 xfrm6_tunnel_spi_lookup(xfrm_address_t *saddr); 9631da177e4SLinus Torvalds extern int xfrm6_output(struct sk_buff *skb); 964aee5adb4SMasahide NAKAMURA extern int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb, 965aee5adb4SMasahide NAKAMURA u8 **prevhdr); 9661da177e4SLinus Torvalds 9671da177e4SLinus Torvalds #ifdef CONFIG_XFRM 9681da177e4SLinus Torvalds extern int xfrm4_rcv_encap(struct sk_buff *skb, __u16 encap_type); 9691da177e4SLinus Torvalds extern int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen); 9701da177e4SLinus Torvalds extern int xfrm_dst_lookup(struct xfrm_dst **dst, struct flowi *fl, unsigned short family); 9711da177e4SLinus Torvalds #else 9721da177e4SLinus Torvalds static inline int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen) 9731da177e4SLinus Torvalds { 9741da177e4SLinus Torvalds return -ENOPROTOOPT; 9751da177e4SLinus Torvalds } 9761da177e4SLinus Torvalds 9771da177e4SLinus Torvalds static inline int xfrm4_rcv_encap(struct sk_buff *skb, __u16 encap_type) 9781da177e4SLinus Torvalds { 9791da177e4SLinus Torvalds /* should not happen */ 9801da177e4SLinus Torvalds kfree_skb(skb); 9811da177e4SLinus Torvalds return 0; 9821da177e4SLinus Torvalds } 9831da177e4SLinus Torvalds static inline int xfrm_dst_lookup(struct xfrm_dst **dst, struct flowi *fl, unsigned short family) 9841da177e4SLinus Torvalds { 9851da177e4SLinus Torvalds return -EINVAL; 9861da177e4SLinus Torvalds } 9871da177e4SLinus Torvalds #endif 9881da177e4SLinus Torvalds 989dd0fc66fSAl Viro struct xfrm_policy *xfrm_policy_alloc(gfp_t gfp); 9901da177e4SLinus Torvalds extern int xfrm_policy_walk(int (*func)(struct xfrm_policy *, int, int, void*), void *); 9911da177e4SLinus Torvalds int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl); 992df71837dSTrent Jaeger struct xfrm_policy *xfrm_policy_bysel_ctx(int dir, struct xfrm_selector *sel, 993df71837dSTrent Jaeger struct xfrm_sec_ctx *ctx, int delete); 9941da177e4SLinus Torvalds struct xfrm_policy *xfrm_policy_byid(int dir, u32 id, int delete); 9951da177e4SLinus Torvalds void xfrm_policy_flush(void); 9961da177e4SLinus Torvalds u32 xfrm_get_acqseq(void); 9971da177e4SLinus Torvalds void xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi); 9981da177e4SLinus Torvalds struct xfrm_state * xfrm_find_acq(u8 mode, u32 reqid, u8 proto, 9991da177e4SLinus Torvalds xfrm_address_t *daddr, xfrm_address_t *saddr, 10001da177e4SLinus Torvalds int create, unsigned short family); 10011da177e4SLinus Torvalds extern void xfrm_policy_flush(void); 10021da177e4SLinus Torvalds extern int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol); 10031da177e4SLinus Torvalds extern int xfrm_flush_bundles(void); 1004399c180aSDavid S. Miller extern void xfrm_flush_all_bundles(void); 10051da177e4SLinus Torvalds extern int xfrm_bundle_ok(struct xfrm_dst *xdst, struct flowi *fl, int family); 10061da177e4SLinus Torvalds extern void xfrm_init_pmtu(struct dst_entry *dst); 10071da177e4SLinus Torvalds 10081da177e4SLinus Torvalds extern wait_queue_head_t km_waitq; 10091da177e4SLinus Torvalds extern int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, u16 sport); 10106c5c8ca7SJamal Hadi Salim extern void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 pid); 10111da177e4SLinus Torvalds 10121da177e4SLinus Torvalds extern void xfrm_input_init(void); 10131da177e4SLinus Torvalds extern int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, u32 *spi, u32 *seq); 10141da177e4SLinus Torvalds 10151da177e4SLinus Torvalds extern void xfrm_probe_algs(void); 10161da177e4SLinus Torvalds extern int xfrm_count_auth_supported(void); 10171da177e4SLinus Torvalds extern int xfrm_count_enc_supported(void); 10181da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx); 10191da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx); 10201da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id); 10211da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id); 10221da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id); 10231da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_aalg_get_byname(char *name, int probe); 10241da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_ealg_get_byname(char *name, int probe); 10251da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_calg_get_byname(char *name, int probe); 10261da177e4SLinus Torvalds 102707d4ee58SHerbert Xu struct hash_desc; 10289409f38aSHerbert Xu struct scatterlist; 102907d4ee58SHerbert Xu typedef int (icv_update_fn_t)(struct hash_desc *, struct scatterlist *, 103007d4ee58SHerbert Xu unsigned int); 10311da177e4SLinus Torvalds 103207d4ee58SHerbert Xu extern int skb_icv_walk(const struct sk_buff *skb, struct hash_desc *tfm, 10331da177e4SLinus Torvalds int offset, int len, icv_update_fn_t icv_update); 10341da177e4SLinus Torvalds 10351da177e4SLinus Torvalds static inline int xfrm_addr_cmp(xfrm_address_t *a, xfrm_address_t *b, 10361da177e4SLinus Torvalds int family) 10371da177e4SLinus Torvalds { 10381da177e4SLinus Torvalds switch (family) { 10391da177e4SLinus Torvalds default: 10401da177e4SLinus Torvalds case AF_INET: 10411da177e4SLinus Torvalds return a->a4 - b->a4; 10421da177e4SLinus Torvalds case AF_INET6: 10431da177e4SLinus Torvalds return ipv6_addr_cmp((struct in6_addr *)a, 10441da177e4SLinus Torvalds (struct in6_addr *)b); 10451da177e4SLinus Torvalds } 10461da177e4SLinus Torvalds } 10471da177e4SLinus Torvalds 104877d8d7a6SHerbert Xu static inline int xfrm_policy_id2dir(u32 index) 104977d8d7a6SHerbert Xu { 105077d8d7a6SHerbert Xu return index & 7; 105177d8d7a6SHerbert Xu } 105277d8d7a6SHerbert Xu 1053f8cd5488SJamal Hadi Salim static inline int xfrm_aevent_is_on(void) 1054f8cd5488SJamal Hadi Salim { 1055be33690dSPatrick McHardy struct sock *nlsk; 1056be33690dSPatrick McHardy int ret = 0; 1057be33690dSPatrick McHardy 1058be33690dSPatrick McHardy rcu_read_lock(); 1059be33690dSPatrick McHardy nlsk = rcu_dereference(xfrm_nl); 1060be33690dSPatrick McHardy if (nlsk) 1061be33690dSPatrick McHardy ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS); 1062be33690dSPatrick McHardy rcu_read_unlock(); 1063be33690dSPatrick McHardy return ret; 1064f8cd5488SJamal Hadi Salim } 1065f8cd5488SJamal Hadi Salim 1066f8cd5488SJamal Hadi Salim static inline void xfrm_aevent_doreplay(struct xfrm_state *x) 1067f8cd5488SJamal Hadi Salim { 1068f8cd5488SJamal Hadi Salim if (xfrm_aevent_is_on()) 1069f8cd5488SJamal Hadi Salim xfrm_replay_notify(x, XFRM_REPLAY_UPDATE); 1070f8cd5488SJamal Hadi Salim } 1071f8cd5488SJamal Hadi Salim 1072f8cd5488SJamal Hadi Salim 10731da177e4SLinus Torvalds #endif /* _NET_XFRM_H */ 1074