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 137060f02a3SNoriaki TAKAMIYA /* Data for care-of address */ 138060f02a3SNoriaki TAKAMIYA xfrm_address_t *coaddr; 139060f02a3SNoriaki TAKAMIYA 1401da177e4SLinus Torvalds /* IPComp needs an IPIP tunnel for handling uncompressed packets */ 1411da177e4SLinus Torvalds struct xfrm_state *tunnel; 1421da177e4SLinus Torvalds 1431da177e4SLinus Torvalds /* If a tunnel, number of users + 1 */ 1441da177e4SLinus Torvalds atomic_t tunnel_users; 1451da177e4SLinus Torvalds 1461da177e4SLinus Torvalds /* State for replay detection */ 1471da177e4SLinus Torvalds struct xfrm_replay_state replay; 1481da177e4SLinus Torvalds 149f8cd5488SJamal Hadi Salim /* Replay detection state at the time we sent the last notification */ 150f8cd5488SJamal Hadi Salim struct xfrm_replay_state preplay; 151f8cd5488SJamal Hadi Salim 1522717096aSJamal Hadi Salim /* internal flag that only holds state for delayed aevent at the 1532717096aSJamal Hadi Salim * moment 1542717096aSJamal Hadi Salim */ 1552717096aSJamal Hadi Salim u32 xflags; 1562717096aSJamal Hadi Salim 157f8cd5488SJamal Hadi Salim /* Replay detection notification settings */ 158f8cd5488SJamal Hadi Salim u32 replay_maxage; 159f8cd5488SJamal Hadi Salim u32 replay_maxdiff; 160f8cd5488SJamal Hadi Salim 161f8cd5488SJamal Hadi Salim /* Replay detection notification timer */ 162f8cd5488SJamal Hadi Salim struct timer_list rtimer; 163f8cd5488SJamal Hadi Salim 1641da177e4SLinus Torvalds /* Statistics */ 1651da177e4SLinus Torvalds struct xfrm_stats stats; 1661da177e4SLinus Torvalds 1671da177e4SLinus Torvalds struct xfrm_lifetime_cur curlft; 1681da177e4SLinus Torvalds struct timer_list timer; 1691da177e4SLinus Torvalds 1709afaca05SMasahide NAKAMURA /* Last used time */ 1719afaca05SMasahide NAKAMURA u64 lastused; 1729afaca05SMasahide NAKAMURA 1731da177e4SLinus Torvalds /* Reference to data common to all the instances of this 1741da177e4SLinus Torvalds * transformer. */ 1751da177e4SLinus Torvalds struct xfrm_type *type; 176b59f45d0SHerbert Xu struct xfrm_mode *mode; 1771da177e4SLinus Torvalds 178df71837dSTrent Jaeger /* Security context */ 179df71837dSTrent Jaeger struct xfrm_sec_ctx *security; 180df71837dSTrent Jaeger 1811da177e4SLinus Torvalds /* Private data of this transformer, format is opaque, 1821da177e4SLinus Torvalds * interpreted by xfrm_type methods. */ 1831da177e4SLinus Torvalds void *data; 1841da177e4SLinus Torvalds }; 1851da177e4SLinus Torvalds 1862717096aSJamal Hadi Salim /* xflags - make enum if more show up */ 1872717096aSJamal Hadi Salim #define XFRM_TIME_DEFER 1 1882717096aSJamal Hadi Salim 1891da177e4SLinus Torvalds enum { 1901da177e4SLinus Torvalds XFRM_STATE_VOID, 1911da177e4SLinus Torvalds XFRM_STATE_ACQ, 1921da177e4SLinus Torvalds XFRM_STATE_VALID, 1931da177e4SLinus Torvalds XFRM_STATE_ERROR, 1941da177e4SLinus Torvalds XFRM_STATE_EXPIRED, 1951da177e4SLinus Torvalds XFRM_STATE_DEAD 1961da177e4SLinus Torvalds }; 1971da177e4SLinus Torvalds 19826b15dadSJamal Hadi Salim /* callback structure passed from either netlink or pfkey */ 19926b15dadSJamal Hadi Salim struct km_event 20026b15dadSJamal Hadi Salim { 201bf08867fSHerbert Xu union { 202bf08867fSHerbert Xu u32 hard; 203bf08867fSHerbert Xu u32 proto; 204bf08867fSHerbert Xu u32 byid; 205f8cd5488SJamal Hadi Salim u32 aevent; 206bf08867fSHerbert Xu } data; 207bf08867fSHerbert Xu 20826b15dadSJamal Hadi Salim u32 seq; 20926b15dadSJamal Hadi Salim u32 pid; 21026b15dadSJamal Hadi Salim u32 event; 21126b15dadSJamal Hadi Salim }; 21226b15dadSJamal Hadi Salim 2131da177e4SLinus Torvalds struct xfrm_type; 2141da177e4SLinus Torvalds struct xfrm_dst; 2151da177e4SLinus Torvalds struct xfrm_policy_afinfo { 2161da177e4SLinus Torvalds unsigned short family; 21773654d61SHerbert Xu struct xfrm_type *type_map[IPPROTO_MAX]; 218b59f45d0SHerbert Xu struct xfrm_mode *mode_map[XFRM_MODE_MAX]; 2191da177e4SLinus Torvalds struct dst_ops *dst_ops; 2201da177e4SLinus Torvalds void (*garbage_collect)(void); 2211da177e4SLinus Torvalds int (*dst_lookup)(struct xfrm_dst **dst, struct flowi *fl); 2221da177e4SLinus Torvalds struct dst_entry *(*find_bundle)(struct flowi *fl, struct xfrm_policy *policy); 2231da177e4SLinus Torvalds int (*bundle_create)(struct xfrm_policy *policy, 2241da177e4SLinus Torvalds struct xfrm_state **xfrm, 2251da177e4SLinus Torvalds int nx, 2261da177e4SLinus Torvalds struct flowi *fl, 2271da177e4SLinus Torvalds struct dst_entry **dst_p); 2281da177e4SLinus Torvalds void (*decode_session)(struct sk_buff *skb, 2291da177e4SLinus Torvalds struct flowi *fl); 2301da177e4SLinus Torvalds }; 2311da177e4SLinus Torvalds 2321da177e4SLinus Torvalds extern int xfrm_policy_register_afinfo(struct xfrm_policy_afinfo *afinfo); 2331da177e4SLinus Torvalds extern int xfrm_policy_unregister_afinfo(struct xfrm_policy_afinfo *afinfo); 23426b15dadSJamal Hadi Salim extern void km_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c); 23526b15dadSJamal Hadi Salim extern void km_state_notify(struct xfrm_state *x, struct km_event *c); 2361da177e4SLinus Torvalds #define XFRM_ACQ_EXPIRES 30 2371da177e4SLinus Torvalds 2381da177e4SLinus Torvalds struct xfrm_tmpl; 239980ebd25SJamal Hadi Salim extern int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol); 24053bc6b4dSJamal Hadi Salim extern void km_state_expired(struct xfrm_state *x, int hard, u32 pid); 24153bc6b4dSJamal Hadi Salim extern int __xfrm_state_delete(struct xfrm_state *x); 24253bc6b4dSJamal Hadi Salim 2431da177e4SLinus Torvalds struct xfrm_state_afinfo { 2441da177e4SLinus Torvalds unsigned short family; 2451da177e4SLinus Torvalds struct list_head *state_bydst; 2466c44e6b7SMasahide NAKAMURA struct list_head *state_bysrc; 2471da177e4SLinus Torvalds struct list_head *state_byspi; 248d094cd83SHerbert Xu int (*init_flags)(struct xfrm_state *x); 2491da177e4SLinus Torvalds void (*init_tempsel)(struct xfrm_state *x, struct flowi *fl, 2501da177e4SLinus Torvalds struct xfrm_tmpl *tmpl, 2511da177e4SLinus Torvalds xfrm_address_t *daddr, xfrm_address_t *saddr); 2521da177e4SLinus Torvalds struct xfrm_state *(*state_lookup)(xfrm_address_t *daddr, u32 spi, u8 proto); 253eb2971b6SMasahide NAKAMURA struct xfrm_state *(*state_lookup_byaddr)(xfrm_address_t *daddr, xfrm_address_t *saddr, u8 proto); 2541da177e4SLinus Torvalds struct xfrm_state *(*find_acq)(u8 mode, u32 reqid, u8 proto, 2551da177e4SLinus Torvalds xfrm_address_t *daddr, xfrm_address_t *saddr, 2561da177e4SLinus Torvalds int create); 2571da177e4SLinus Torvalds }; 2581da177e4SLinus Torvalds 2591da177e4SLinus Torvalds extern int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo); 2601da177e4SLinus Torvalds extern int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo); 2611da177e4SLinus Torvalds 2621da177e4SLinus Torvalds extern void xfrm_state_delete_tunnel(struct xfrm_state *x); 2631da177e4SLinus Torvalds 2641da177e4SLinus Torvalds struct xfrm_type 2651da177e4SLinus Torvalds { 2661da177e4SLinus Torvalds char *description; 2671da177e4SLinus Torvalds struct module *owner; 2681da177e4SLinus Torvalds __u8 proto; 2691b5c2299SMasahide NAKAMURA __u8 flags; 2701b5c2299SMasahide NAKAMURA #define XFRM_TYPE_NON_FRAGMENT 1 2711da177e4SLinus Torvalds 27272cb6962SHerbert Xu int (*init_state)(struct xfrm_state *x); 2731da177e4SLinus Torvalds void (*destructor)(struct xfrm_state *); 274e695633eSHerbert Xu int (*input)(struct xfrm_state *, struct sk_buff *skb); 2751da177e4SLinus Torvalds int (*output)(struct xfrm_state *, struct sk_buff *pskb); 276*df0ba92aSMasahide NAKAMURA int (*reject)(struct xfrm_state *, struct sk_buff *, struct flowi *); 277aee5adb4SMasahide NAKAMURA int (*hdr_offset)(struct xfrm_state *, struct sk_buff *, u8 **); 27899505a84SMasahide NAKAMURA xfrm_address_t *(*local_addr)(struct xfrm_state *, xfrm_address_t *); 27999505a84SMasahide NAKAMURA xfrm_address_t *(*remote_addr)(struct xfrm_state *, xfrm_address_t *); 2801da177e4SLinus Torvalds /* Estimate maximal size of result of transformation of a dgram */ 2811da177e4SLinus Torvalds u32 (*get_max_size)(struct xfrm_state *, int size); 2821da177e4SLinus Torvalds }; 2831da177e4SLinus Torvalds 2841da177e4SLinus Torvalds extern int xfrm_register_type(struct xfrm_type *type, unsigned short family); 2851da177e4SLinus Torvalds extern int xfrm_unregister_type(struct xfrm_type *type, unsigned short family); 2861da177e4SLinus Torvalds extern struct xfrm_type *xfrm_get_type(u8 proto, unsigned short family); 2871da177e4SLinus Torvalds extern void xfrm_put_type(struct xfrm_type *type); 2881da177e4SLinus Torvalds 289b59f45d0SHerbert Xu struct xfrm_mode { 290b59f45d0SHerbert Xu int (*input)(struct xfrm_state *x, struct sk_buff *skb); 291b59f45d0SHerbert Xu int (*output)(struct sk_buff *skb); 292b59f45d0SHerbert Xu 293b59f45d0SHerbert Xu struct module *owner; 294b59f45d0SHerbert Xu unsigned int encap; 295b59f45d0SHerbert Xu }; 296b59f45d0SHerbert Xu 297b59f45d0SHerbert Xu extern int xfrm_register_mode(struct xfrm_mode *mode, int family); 298b59f45d0SHerbert Xu extern int xfrm_unregister_mode(struct xfrm_mode *mode, int family); 299b59f45d0SHerbert Xu extern struct xfrm_mode *xfrm_get_mode(unsigned int encap, int family); 300b59f45d0SHerbert Xu extern void xfrm_put_mode(struct xfrm_mode *mode); 301b59f45d0SHerbert Xu 3021da177e4SLinus Torvalds struct xfrm_tmpl 3031da177e4SLinus Torvalds { 3041da177e4SLinus Torvalds /* id in template is interpreted as: 3051da177e4SLinus Torvalds * daddr - destination of tunnel, may be zero for transport mode. 3061da177e4SLinus Torvalds * spi - zero to acquire spi. Not zero if spi is static, then 3071da177e4SLinus Torvalds * daddr must be fixed too. 3081da177e4SLinus Torvalds * proto - AH/ESP/IPCOMP 3091da177e4SLinus Torvalds */ 3101da177e4SLinus Torvalds struct xfrm_id id; 3111da177e4SLinus Torvalds 3121da177e4SLinus Torvalds /* Source address of tunnel. Ignored, if it is not a tunnel. */ 3131da177e4SLinus Torvalds xfrm_address_t saddr; 3141da177e4SLinus Torvalds 3151da177e4SLinus Torvalds __u32 reqid; 3161da177e4SLinus Torvalds 3177e49e6deSMasahide NAKAMURA /* Mode: transport, tunnel etc. */ 3181da177e4SLinus Torvalds __u8 mode; 3191da177e4SLinus Torvalds 3201da177e4SLinus Torvalds /* Sharing mode: unique, this session only, this user only etc. */ 3211da177e4SLinus Torvalds __u8 share; 3221da177e4SLinus Torvalds 3231da177e4SLinus Torvalds /* May skip this transfomration if no SA is found */ 3241da177e4SLinus Torvalds __u8 optional; 3251da177e4SLinus Torvalds 3261da177e4SLinus Torvalds /* Bit mask of algos allowed for acquisition */ 3271da177e4SLinus Torvalds __u32 aalgos; 3281da177e4SLinus Torvalds __u32 ealgos; 3291da177e4SLinus Torvalds __u32 calgos; 3301da177e4SLinus Torvalds }; 3311da177e4SLinus Torvalds 332622dc828SMasahide NAKAMURA #define XFRM_MAX_DEPTH 6 3331da177e4SLinus Torvalds 3341da177e4SLinus Torvalds struct xfrm_policy 3351da177e4SLinus Torvalds { 3361da177e4SLinus Torvalds struct xfrm_policy *next; 3371da177e4SLinus Torvalds struct list_head list; 3381da177e4SLinus Torvalds 3391da177e4SLinus Torvalds /* This lock only affects elements except for entry. */ 3401da177e4SLinus Torvalds rwlock_t lock; 3411da177e4SLinus Torvalds atomic_t refcnt; 3421da177e4SLinus Torvalds struct timer_list timer; 3431da177e4SLinus Torvalds 3441da177e4SLinus Torvalds u32 priority; 3451da177e4SLinus Torvalds u32 index; 3461da177e4SLinus Torvalds struct xfrm_selector selector; 3471da177e4SLinus Torvalds struct xfrm_lifetime_cfg lft; 3481da177e4SLinus Torvalds struct xfrm_lifetime_cur curlft; 3491da177e4SLinus Torvalds struct dst_entry *bundles; 3501da177e4SLinus Torvalds __u16 family; 3511da177e4SLinus Torvalds __u8 action; 3521da177e4SLinus Torvalds __u8 flags; 3531da177e4SLinus Torvalds __u8 dead; 3541da177e4SLinus Torvalds __u8 xfrm_nr; 355df71837dSTrent Jaeger struct xfrm_sec_ctx *security; 3561da177e4SLinus Torvalds struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH]; 3571da177e4SLinus Torvalds }; 3581da177e4SLinus Torvalds 3591da177e4SLinus Torvalds #define XFRM_KM_TIMEOUT 30 360f8cd5488SJamal Hadi Salim /* which seqno */ 361f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_SEQ 1 362f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_OSEQ 2 363f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_SEQ_MASK 3 364f8cd5488SJamal Hadi Salim /* what happened */ 365f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_UPDATE XFRM_AE_CR 366f8cd5488SJamal Hadi Salim #define XFRM_REPLAY_TIMEOUT XFRM_AE_CE 367f8cd5488SJamal Hadi Salim 368f8cd5488SJamal Hadi Salim /* default aevent timeout in units of 100ms */ 369f8cd5488SJamal Hadi Salim #define XFRM_AE_ETIME 10 370f8cd5488SJamal Hadi Salim /* Async Event timer multiplier */ 371f8cd5488SJamal Hadi Salim #define XFRM_AE_ETH_M 10 372f8cd5488SJamal Hadi Salim /* default seq threshold size */ 373f8cd5488SJamal Hadi Salim #define XFRM_AE_SEQT_SIZE 2 3741da177e4SLinus Torvalds 3751da177e4SLinus Torvalds struct xfrm_mgr 3761da177e4SLinus Torvalds { 3771da177e4SLinus Torvalds struct list_head list; 3781da177e4SLinus Torvalds char *id; 37926b15dadSJamal Hadi Salim int (*notify)(struct xfrm_state *x, struct km_event *c); 3801da177e4SLinus Torvalds int (*acquire)(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *xp, int dir); 381cb969f07SVenkat Yekkirala struct xfrm_policy *(*compile_policy)(struct sock *sk, int opt, u8 *data, int len, int *dir); 3821da177e4SLinus Torvalds int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, u16 sport); 38326b15dadSJamal Hadi Salim int (*notify_policy)(struct xfrm_policy *x, int dir, struct km_event *c); 3841da177e4SLinus Torvalds }; 3851da177e4SLinus Torvalds 3861da177e4SLinus Torvalds extern int xfrm_register_km(struct xfrm_mgr *km); 3871da177e4SLinus Torvalds extern int xfrm_unregister_km(struct xfrm_mgr *km); 3881da177e4SLinus Torvalds 3891da177e4SLinus Torvalds 3901da177e4SLinus Torvalds extern struct xfrm_policy *xfrm_policy_list[XFRM_POLICY_MAX*2]; 3911da177e4SLinus Torvalds 3921da177e4SLinus Torvalds static inline void xfrm_pol_hold(struct xfrm_policy *policy) 3931da177e4SLinus Torvalds { 3941da177e4SLinus Torvalds if (likely(policy != NULL)) 3951da177e4SLinus Torvalds atomic_inc(&policy->refcnt); 3961da177e4SLinus Torvalds } 3971da177e4SLinus Torvalds 3981da177e4SLinus Torvalds extern void __xfrm_policy_destroy(struct xfrm_policy *policy); 3991da177e4SLinus Torvalds 4001da177e4SLinus Torvalds static inline void xfrm_pol_put(struct xfrm_policy *policy) 4011da177e4SLinus Torvalds { 4021da177e4SLinus Torvalds if (atomic_dec_and_test(&policy->refcnt)) 4031da177e4SLinus Torvalds __xfrm_policy_destroy(policy); 4041da177e4SLinus Torvalds } 4051da177e4SLinus Torvalds 4061da177e4SLinus Torvalds #define XFRM_DST_HSIZE 1024 4071da177e4SLinus Torvalds 4081da177e4SLinus Torvalds static __inline__ 4091da177e4SLinus Torvalds unsigned __xfrm4_dst_hash(xfrm_address_t *addr) 4101da177e4SLinus Torvalds { 4111da177e4SLinus Torvalds unsigned h; 4121da177e4SLinus Torvalds h = ntohl(addr->a4); 4131da177e4SLinus Torvalds h = (h ^ (h>>16)) % XFRM_DST_HSIZE; 4141da177e4SLinus Torvalds return h; 4151da177e4SLinus Torvalds } 4161da177e4SLinus Torvalds 4171da177e4SLinus Torvalds static __inline__ 4181da177e4SLinus Torvalds unsigned __xfrm6_dst_hash(xfrm_address_t *addr) 4191da177e4SLinus Torvalds { 4201da177e4SLinus Torvalds unsigned h; 4211da177e4SLinus Torvalds h = ntohl(addr->a6[2]^addr->a6[3]); 4221da177e4SLinus Torvalds h = (h ^ (h>>16)) % XFRM_DST_HSIZE; 4231da177e4SLinus Torvalds return h; 4241da177e4SLinus Torvalds } 4251da177e4SLinus Torvalds 4261da177e4SLinus Torvalds static __inline__ 4271da177e4SLinus Torvalds unsigned xfrm_dst_hash(xfrm_address_t *addr, unsigned short family) 4281da177e4SLinus Torvalds { 4291da177e4SLinus Torvalds switch (family) { 4301da177e4SLinus Torvalds case AF_INET: 4311da177e4SLinus Torvalds return __xfrm4_dst_hash(addr); 4321da177e4SLinus Torvalds case AF_INET6: 4331da177e4SLinus Torvalds return __xfrm6_dst_hash(addr); 4341da177e4SLinus Torvalds } 4351da177e4SLinus Torvalds return 0; 4361da177e4SLinus Torvalds } 4371da177e4SLinus Torvalds 4381da177e4SLinus Torvalds static __inline__ 4396c44e6b7SMasahide NAKAMURA unsigned __xfrm4_src_hash(xfrm_address_t *addr) 4406c44e6b7SMasahide NAKAMURA { 4416c44e6b7SMasahide NAKAMURA return __xfrm4_dst_hash(addr); 4426c44e6b7SMasahide NAKAMURA } 4436c44e6b7SMasahide NAKAMURA 4446c44e6b7SMasahide NAKAMURA static __inline__ 4456c44e6b7SMasahide NAKAMURA unsigned __xfrm6_src_hash(xfrm_address_t *addr) 4466c44e6b7SMasahide NAKAMURA { 4476c44e6b7SMasahide NAKAMURA return __xfrm6_dst_hash(addr); 4486c44e6b7SMasahide NAKAMURA } 4496c44e6b7SMasahide NAKAMURA 4506c44e6b7SMasahide NAKAMURA static __inline__ 4516c44e6b7SMasahide NAKAMURA unsigned xfrm_src_hash(xfrm_address_t *addr, unsigned short family) 4526c44e6b7SMasahide NAKAMURA { 4536c44e6b7SMasahide NAKAMURA switch (family) { 4546c44e6b7SMasahide NAKAMURA case AF_INET: 4556c44e6b7SMasahide NAKAMURA return __xfrm4_src_hash(addr); 4566c44e6b7SMasahide NAKAMURA case AF_INET6: 4576c44e6b7SMasahide NAKAMURA return __xfrm6_src_hash(addr); 4586c44e6b7SMasahide NAKAMURA } 4596c44e6b7SMasahide NAKAMURA return 0; 4606c44e6b7SMasahide NAKAMURA } 4616c44e6b7SMasahide NAKAMURA 4626c44e6b7SMasahide NAKAMURA static __inline__ 4631da177e4SLinus Torvalds unsigned __xfrm4_spi_hash(xfrm_address_t *addr, u32 spi, u8 proto) 4641da177e4SLinus Torvalds { 4651da177e4SLinus Torvalds unsigned h; 4661da177e4SLinus Torvalds h = ntohl(addr->a4^spi^proto); 4671da177e4SLinus Torvalds h = (h ^ (h>>10) ^ (h>>20)) % XFRM_DST_HSIZE; 4681da177e4SLinus Torvalds return h; 4691da177e4SLinus Torvalds } 4701da177e4SLinus Torvalds 4711da177e4SLinus Torvalds static __inline__ 4721da177e4SLinus Torvalds unsigned __xfrm6_spi_hash(xfrm_address_t *addr, u32 spi, u8 proto) 4731da177e4SLinus Torvalds { 4741da177e4SLinus Torvalds unsigned h; 4751da177e4SLinus Torvalds h = ntohl(addr->a6[2]^addr->a6[3]^spi^proto); 4761da177e4SLinus Torvalds h = (h ^ (h>>10) ^ (h>>20)) % XFRM_DST_HSIZE; 4771da177e4SLinus Torvalds return h; 4781da177e4SLinus Torvalds } 4791da177e4SLinus Torvalds 4801da177e4SLinus Torvalds static __inline__ 4811da177e4SLinus Torvalds unsigned xfrm_spi_hash(xfrm_address_t *addr, u32 spi, u8 proto, unsigned short family) 4821da177e4SLinus Torvalds { 4831da177e4SLinus Torvalds switch (family) { 4841da177e4SLinus Torvalds case AF_INET: 4851da177e4SLinus Torvalds return __xfrm4_spi_hash(addr, spi, proto); 4861da177e4SLinus Torvalds case AF_INET6: 4871da177e4SLinus Torvalds return __xfrm6_spi_hash(addr, spi, proto); 4881da177e4SLinus Torvalds } 4891da177e4SLinus Torvalds return 0; /*XXX*/ 4901da177e4SLinus Torvalds } 4911da177e4SLinus Torvalds 4921da177e4SLinus Torvalds extern void __xfrm_state_destroy(struct xfrm_state *); 4931da177e4SLinus Torvalds 49421380b81SHerbert Xu static inline void __xfrm_state_put(struct xfrm_state *x) 49521380b81SHerbert Xu { 49621380b81SHerbert Xu atomic_dec(&x->refcnt); 49721380b81SHerbert Xu } 49821380b81SHerbert Xu 4991da177e4SLinus Torvalds static inline void xfrm_state_put(struct xfrm_state *x) 5001da177e4SLinus Torvalds { 5011da177e4SLinus Torvalds if (atomic_dec_and_test(&x->refcnt)) 5021da177e4SLinus Torvalds __xfrm_state_destroy(x); 5031da177e4SLinus Torvalds } 5041da177e4SLinus Torvalds 5051da177e4SLinus Torvalds static inline void xfrm_state_hold(struct xfrm_state *x) 5061da177e4SLinus Torvalds { 5071da177e4SLinus Torvalds atomic_inc(&x->refcnt); 5081da177e4SLinus Torvalds } 5091da177e4SLinus Torvalds 5101da177e4SLinus Torvalds static __inline__ int addr_match(void *token1, void *token2, int prefixlen) 5111da177e4SLinus Torvalds { 5121da177e4SLinus Torvalds __u32 *a1 = token1; 5131da177e4SLinus Torvalds __u32 *a2 = token2; 5141da177e4SLinus Torvalds int pdw; 5151da177e4SLinus Torvalds int pbi; 5161da177e4SLinus Torvalds 5171da177e4SLinus Torvalds pdw = prefixlen >> 5; /* num of whole __u32 in prefix */ 5181da177e4SLinus Torvalds pbi = prefixlen & 0x1f; /* num of bits in incomplete u32 in prefix */ 5191da177e4SLinus Torvalds 5201da177e4SLinus Torvalds if (pdw) 5211da177e4SLinus Torvalds if (memcmp(a1, a2, pdw << 2)) 5221da177e4SLinus Torvalds return 0; 5231da177e4SLinus Torvalds 5241da177e4SLinus Torvalds if (pbi) { 5251da177e4SLinus Torvalds __u32 mask; 5261da177e4SLinus Torvalds 5271da177e4SLinus Torvalds mask = htonl((0xffffffff) << (32 - pbi)); 5281da177e4SLinus Torvalds 5291da177e4SLinus Torvalds if ((a1[pdw] ^ a2[pdw]) & mask) 5301da177e4SLinus Torvalds return 0; 5311da177e4SLinus Torvalds } 5321da177e4SLinus Torvalds 5331da177e4SLinus Torvalds return 1; 5341da177e4SLinus Torvalds } 5351da177e4SLinus Torvalds 5361da177e4SLinus Torvalds static __inline__ 5371da177e4SLinus Torvalds u16 xfrm_flowi_sport(struct flowi *fl) 5381da177e4SLinus Torvalds { 5391da177e4SLinus Torvalds u16 port; 5401da177e4SLinus Torvalds switch(fl->proto) { 5411da177e4SLinus Torvalds case IPPROTO_TCP: 5421da177e4SLinus Torvalds case IPPROTO_UDP: 5431da177e4SLinus Torvalds case IPPROTO_SCTP: 5441da177e4SLinus Torvalds port = fl->fl_ip_sport; 5451da177e4SLinus Torvalds break; 5461da177e4SLinus Torvalds case IPPROTO_ICMP: 5471da177e4SLinus Torvalds case IPPROTO_ICMPV6: 5481da177e4SLinus Torvalds port = htons(fl->fl_icmp_type); 5491da177e4SLinus Torvalds break; 5502ce4272aSMasahide NAKAMURA #ifdef CONFIG_IPV6_MIP6 5512ce4272aSMasahide NAKAMURA case IPPROTO_MH: 5522ce4272aSMasahide NAKAMURA port = htons(fl->fl_mh_type); 5532ce4272aSMasahide NAKAMURA break; 5542ce4272aSMasahide NAKAMURA #endif 5551da177e4SLinus Torvalds default: 5561da177e4SLinus Torvalds port = 0; /*XXX*/ 5571da177e4SLinus Torvalds } 5581da177e4SLinus Torvalds return port; 5591da177e4SLinus Torvalds } 5601da177e4SLinus Torvalds 5611da177e4SLinus Torvalds static __inline__ 5621da177e4SLinus Torvalds u16 xfrm_flowi_dport(struct flowi *fl) 5631da177e4SLinus Torvalds { 5641da177e4SLinus Torvalds u16 port; 5651da177e4SLinus Torvalds switch(fl->proto) { 5661da177e4SLinus Torvalds case IPPROTO_TCP: 5671da177e4SLinus Torvalds case IPPROTO_UDP: 5681da177e4SLinus Torvalds case IPPROTO_SCTP: 5691da177e4SLinus Torvalds port = fl->fl_ip_dport; 5701da177e4SLinus Torvalds break; 5711da177e4SLinus Torvalds case IPPROTO_ICMP: 5721da177e4SLinus Torvalds case IPPROTO_ICMPV6: 5731da177e4SLinus Torvalds port = htons(fl->fl_icmp_code); 5741da177e4SLinus Torvalds break; 5751da177e4SLinus Torvalds default: 5761da177e4SLinus Torvalds port = 0; /*XXX*/ 5771da177e4SLinus Torvalds } 5781da177e4SLinus Torvalds return port; 5791da177e4SLinus Torvalds } 5801da177e4SLinus Torvalds 5811da177e4SLinus Torvalds static inline int 5821da177e4SLinus Torvalds __xfrm4_selector_match(struct xfrm_selector *sel, struct flowi *fl) 5831da177e4SLinus Torvalds { 5841da177e4SLinus Torvalds return addr_match(&fl->fl4_dst, &sel->daddr, sel->prefixlen_d) && 5851da177e4SLinus Torvalds addr_match(&fl->fl4_src, &sel->saddr, sel->prefixlen_s) && 5861da177e4SLinus Torvalds !((xfrm_flowi_dport(fl) ^ sel->dport) & sel->dport_mask) && 5871da177e4SLinus Torvalds !((xfrm_flowi_sport(fl) ^ sel->sport) & sel->sport_mask) && 5881da177e4SLinus Torvalds (fl->proto == sel->proto || !sel->proto) && 5891da177e4SLinus Torvalds (fl->oif == sel->ifindex || !sel->ifindex); 5901da177e4SLinus Torvalds } 5911da177e4SLinus Torvalds 5921da177e4SLinus Torvalds static inline int 5931da177e4SLinus Torvalds __xfrm6_selector_match(struct xfrm_selector *sel, struct flowi *fl) 5941da177e4SLinus Torvalds { 5951da177e4SLinus Torvalds return addr_match(&fl->fl6_dst, &sel->daddr, sel->prefixlen_d) && 5961da177e4SLinus Torvalds addr_match(&fl->fl6_src, &sel->saddr, sel->prefixlen_s) && 5971da177e4SLinus Torvalds !((xfrm_flowi_dport(fl) ^ sel->dport) & sel->dport_mask) && 5981da177e4SLinus Torvalds !((xfrm_flowi_sport(fl) ^ sel->sport) & sel->sport_mask) && 5991da177e4SLinus Torvalds (fl->proto == sel->proto || !sel->proto) && 6001da177e4SLinus Torvalds (fl->oif == sel->ifindex || !sel->ifindex); 6011da177e4SLinus Torvalds } 6021da177e4SLinus Torvalds 6031da177e4SLinus Torvalds static inline int 6041da177e4SLinus Torvalds xfrm_selector_match(struct xfrm_selector *sel, struct flowi *fl, 6051da177e4SLinus Torvalds unsigned short family) 6061da177e4SLinus Torvalds { 6071da177e4SLinus Torvalds switch (family) { 6081da177e4SLinus Torvalds case AF_INET: 6091da177e4SLinus Torvalds return __xfrm4_selector_match(sel, fl); 6101da177e4SLinus Torvalds case AF_INET6: 6111da177e4SLinus Torvalds return __xfrm6_selector_match(sel, fl); 6121da177e4SLinus Torvalds } 6131da177e4SLinus Torvalds return 0; 6141da177e4SLinus Torvalds } 6151da177e4SLinus Torvalds 616df71837dSTrent Jaeger #ifdef CONFIG_SECURITY_NETWORK_XFRM 617df71837dSTrent Jaeger /* If neither has a context --> match 618df71837dSTrent Jaeger * Otherwise, both must have a context and the sids, doi, alg must match 619df71837dSTrent Jaeger */ 620df71837dSTrent Jaeger static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) 621df71837dSTrent Jaeger { 622df71837dSTrent Jaeger return ((!s1 && !s2) || 623df71837dSTrent Jaeger (s1 && s2 && 624df71837dSTrent Jaeger (s1->ctx_sid == s2->ctx_sid) && 625df71837dSTrent Jaeger (s1->ctx_doi == s2->ctx_doi) && 626df71837dSTrent Jaeger (s1->ctx_alg == s2->ctx_alg))); 627df71837dSTrent Jaeger } 628df71837dSTrent Jaeger #else 629df71837dSTrent Jaeger static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) 630df71837dSTrent Jaeger { 631df71837dSTrent Jaeger return 1; 632df71837dSTrent Jaeger } 633df71837dSTrent Jaeger #endif 634df71837dSTrent Jaeger 6351da177e4SLinus Torvalds /* A struct encoding bundle of transformations to apply to some set of flow. 6361da177e4SLinus Torvalds * 6371da177e4SLinus Torvalds * dst->child points to the next element of bundle. 6381da177e4SLinus Torvalds * dst->xfrm points to an instanse of transformer. 6391da177e4SLinus Torvalds * 6401da177e4SLinus Torvalds * Due to unfortunate limitations of current routing cache, which we 6411da177e4SLinus Torvalds * have no time to fix, it mirrors struct rtable and bound to the same 6421da177e4SLinus Torvalds * routing key, including saddr,daddr. However, we can have many of 6431da177e4SLinus Torvalds * bundles differing by session id. All the bundles grow from a parent 6441da177e4SLinus Torvalds * policy rule. 6451da177e4SLinus Torvalds */ 6461da177e4SLinus Torvalds struct xfrm_dst 6471da177e4SLinus Torvalds { 6481da177e4SLinus Torvalds union { 6491da177e4SLinus Torvalds struct xfrm_dst *next; 6501da177e4SLinus Torvalds struct dst_entry dst; 6511da177e4SLinus Torvalds struct rtable rt; 6521da177e4SLinus Torvalds struct rt6_info rt6; 6531da177e4SLinus Torvalds } u; 6541da177e4SLinus Torvalds struct dst_entry *route; 6551da177e4SLinus Torvalds u32 route_mtu_cached; 6561da177e4SLinus Torvalds u32 child_mtu_cached; 65792d63decSHideaki YOSHIFUJI u32 route_cookie; 65892d63decSHideaki YOSHIFUJI u32 path_cookie; 6591da177e4SLinus Torvalds }; 6601da177e4SLinus Torvalds 661aabc9761SHerbert Xu static inline void xfrm_dst_destroy(struct xfrm_dst *xdst) 662aabc9761SHerbert Xu { 663aabc9761SHerbert Xu dst_release(xdst->route); 664aabc9761SHerbert Xu if (likely(xdst->u.dst.xfrm)) 665aabc9761SHerbert Xu xfrm_state_put(xdst->u.dst.xfrm); 666aabc9761SHerbert Xu } 667aabc9761SHerbert Xu 668aabc9761SHerbert Xu extern void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev); 669aabc9761SHerbert Xu 6701da177e4SLinus Torvalds struct sec_path 6711da177e4SLinus Torvalds { 6721da177e4SLinus Torvalds atomic_t refcnt; 6731da177e4SLinus Torvalds int len; 674dbe5b4aaSHerbert Xu struct xfrm_state *xvec[XFRM_MAX_DEPTH]; 6751da177e4SLinus Torvalds }; 6761da177e4SLinus Torvalds 6771da177e4SLinus Torvalds static inline struct sec_path * 6781da177e4SLinus Torvalds secpath_get(struct sec_path *sp) 6791da177e4SLinus Torvalds { 6801da177e4SLinus Torvalds if (sp) 6811da177e4SLinus Torvalds atomic_inc(&sp->refcnt); 6821da177e4SLinus Torvalds return sp; 6831da177e4SLinus Torvalds } 6841da177e4SLinus Torvalds 6851da177e4SLinus Torvalds extern void __secpath_destroy(struct sec_path *sp); 6861da177e4SLinus Torvalds 6871da177e4SLinus Torvalds static inline void 6881da177e4SLinus Torvalds secpath_put(struct sec_path *sp) 6891da177e4SLinus Torvalds { 6901da177e4SLinus Torvalds if (sp && atomic_dec_and_test(&sp->refcnt)) 6911da177e4SLinus Torvalds __secpath_destroy(sp); 6921da177e4SLinus Torvalds } 6931da177e4SLinus Torvalds 6941da177e4SLinus Torvalds extern struct sec_path *secpath_dup(struct sec_path *src); 6951da177e4SLinus Torvalds 6961da177e4SLinus Torvalds static inline void 6971da177e4SLinus Torvalds secpath_reset(struct sk_buff *skb) 6981da177e4SLinus Torvalds { 6991da177e4SLinus Torvalds #ifdef CONFIG_XFRM 7001da177e4SLinus Torvalds secpath_put(skb->sp); 7011da177e4SLinus Torvalds skb->sp = NULL; 7021da177e4SLinus Torvalds #endif 7031da177e4SLinus Torvalds } 7041da177e4SLinus Torvalds 7051da177e4SLinus Torvalds static inline int 7061da177e4SLinus Torvalds __xfrm4_state_addr_cmp(struct xfrm_tmpl *tmpl, struct xfrm_state *x) 7071da177e4SLinus Torvalds { 7081da177e4SLinus Torvalds return (tmpl->saddr.a4 && 7091da177e4SLinus Torvalds tmpl->saddr.a4 != x->props.saddr.a4); 7101da177e4SLinus Torvalds } 7111da177e4SLinus Torvalds 7121da177e4SLinus Torvalds static inline int 7131da177e4SLinus Torvalds __xfrm6_state_addr_cmp(struct xfrm_tmpl *tmpl, struct xfrm_state *x) 7141da177e4SLinus Torvalds { 7151da177e4SLinus Torvalds return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) && 7161da177e4SLinus Torvalds ipv6_addr_cmp((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr)); 7171da177e4SLinus Torvalds } 7181da177e4SLinus Torvalds 7191da177e4SLinus Torvalds static inline int 7201da177e4SLinus Torvalds xfrm_state_addr_cmp(struct xfrm_tmpl *tmpl, struct xfrm_state *x, unsigned short family) 7211da177e4SLinus Torvalds { 7221da177e4SLinus Torvalds switch (family) { 7231da177e4SLinus Torvalds case AF_INET: 7241da177e4SLinus Torvalds return __xfrm4_state_addr_cmp(tmpl, x); 7251da177e4SLinus Torvalds case AF_INET6: 7261da177e4SLinus Torvalds return __xfrm6_state_addr_cmp(tmpl, x); 7271da177e4SLinus Torvalds } 7281da177e4SLinus Torvalds return !0; 7291da177e4SLinus Torvalds } 7301da177e4SLinus Torvalds 7311da177e4SLinus Torvalds #ifdef CONFIG_XFRM 7321da177e4SLinus Torvalds 7331da177e4SLinus Torvalds extern int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb, unsigned short family); 7341da177e4SLinus Torvalds 7351da177e4SLinus Torvalds static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) 7361da177e4SLinus Torvalds { 7371da177e4SLinus Torvalds if (sk && sk->sk_policy[XFRM_POLICY_IN]) 7381da177e4SLinus Torvalds return __xfrm_policy_check(sk, dir, skb, family); 7391da177e4SLinus Torvalds 7401da177e4SLinus Torvalds return (!xfrm_policy_list[dir] && !skb->sp) || 7411da177e4SLinus Torvalds (skb->dst->flags & DST_NOPOLICY) || 7421da177e4SLinus Torvalds __xfrm_policy_check(sk, dir, skb, family); 7431da177e4SLinus Torvalds } 7441da177e4SLinus Torvalds 7451da177e4SLinus Torvalds static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 7461da177e4SLinus Torvalds { 7471da177e4SLinus Torvalds return xfrm_policy_check(sk, dir, skb, AF_INET); 7481da177e4SLinus Torvalds } 7491da177e4SLinus Torvalds 7501da177e4SLinus Torvalds static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 7511da177e4SLinus Torvalds { 7521da177e4SLinus Torvalds return xfrm_policy_check(sk, dir, skb, AF_INET6); 7531da177e4SLinus Torvalds } 7541da177e4SLinus Torvalds 7553e3850e9SPatrick McHardy extern int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, unsigned short family); 7561da177e4SLinus Torvalds extern int __xfrm_route_forward(struct sk_buff *skb, unsigned short family); 7571da177e4SLinus Torvalds 7581da177e4SLinus Torvalds static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family) 7591da177e4SLinus Torvalds { 7601da177e4SLinus Torvalds return !xfrm_policy_list[XFRM_POLICY_OUT] || 7611da177e4SLinus Torvalds (skb->dst->flags & DST_NOXFRM) || 7621da177e4SLinus Torvalds __xfrm_route_forward(skb, family); 7631da177e4SLinus Torvalds } 7641da177e4SLinus Torvalds 7651da177e4SLinus Torvalds static inline int xfrm4_route_forward(struct sk_buff *skb) 7661da177e4SLinus Torvalds { 7671da177e4SLinus Torvalds return xfrm_route_forward(skb, AF_INET); 7681da177e4SLinus Torvalds } 7691da177e4SLinus Torvalds 7701da177e4SLinus Torvalds static inline int xfrm6_route_forward(struct sk_buff *skb) 7711da177e4SLinus Torvalds { 7721da177e4SLinus Torvalds return xfrm_route_forward(skb, AF_INET6); 7731da177e4SLinus Torvalds } 7741da177e4SLinus Torvalds 7751da177e4SLinus Torvalds extern int __xfrm_sk_clone_policy(struct sock *sk); 7761da177e4SLinus Torvalds 7771da177e4SLinus Torvalds static inline int xfrm_sk_clone_policy(struct sock *sk) 7781da177e4SLinus Torvalds { 7791da177e4SLinus Torvalds if (unlikely(sk->sk_policy[0] || sk->sk_policy[1])) 7801da177e4SLinus Torvalds return __xfrm_sk_clone_policy(sk); 7811da177e4SLinus Torvalds return 0; 7821da177e4SLinus Torvalds } 7831da177e4SLinus Torvalds 7844666faabSHerbert Xu extern int xfrm_policy_delete(struct xfrm_policy *pol, int dir); 7851da177e4SLinus Torvalds 7861da177e4SLinus Torvalds static inline void xfrm_sk_free_policy(struct sock *sk) 7871da177e4SLinus Torvalds { 7881da177e4SLinus Torvalds if (unlikely(sk->sk_policy[0] != NULL)) { 7891da177e4SLinus Torvalds xfrm_policy_delete(sk->sk_policy[0], XFRM_POLICY_MAX); 7901da177e4SLinus Torvalds sk->sk_policy[0] = NULL; 7911da177e4SLinus Torvalds } 7921da177e4SLinus Torvalds if (unlikely(sk->sk_policy[1] != NULL)) { 7931da177e4SLinus Torvalds xfrm_policy_delete(sk->sk_policy[1], XFRM_POLICY_MAX+1); 7941da177e4SLinus Torvalds sk->sk_policy[1] = NULL; 7951da177e4SLinus Torvalds } 7961da177e4SLinus Torvalds } 7971da177e4SLinus Torvalds 7981da177e4SLinus Torvalds #else 7991da177e4SLinus Torvalds 8001da177e4SLinus Torvalds static inline void xfrm_sk_free_policy(struct sock *sk) {} 8011da177e4SLinus Torvalds static inline int xfrm_sk_clone_policy(struct sock *sk) { return 0; } 8021da177e4SLinus Torvalds static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; } 8031da177e4SLinus Torvalds static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; } 8041da177e4SLinus Torvalds static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 8051da177e4SLinus Torvalds { 8061da177e4SLinus Torvalds return 1; 8071da177e4SLinus Torvalds } 8081da177e4SLinus Torvalds static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) 8091da177e4SLinus Torvalds { 8101da177e4SLinus Torvalds return 1; 8111da177e4SLinus Torvalds } 8121da177e4SLinus Torvalds static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) 8131da177e4SLinus Torvalds { 8141da177e4SLinus Torvalds return 1; 8151da177e4SLinus Torvalds } 8161da177e4SLinus Torvalds #endif 8171da177e4SLinus Torvalds 8181da177e4SLinus Torvalds static __inline__ 8191da177e4SLinus Torvalds xfrm_address_t *xfrm_flowi_daddr(struct flowi *fl, unsigned short family) 8201da177e4SLinus Torvalds { 8211da177e4SLinus Torvalds switch (family){ 8221da177e4SLinus Torvalds case AF_INET: 8231da177e4SLinus Torvalds return (xfrm_address_t *)&fl->fl4_dst; 8241da177e4SLinus Torvalds case AF_INET6: 8251da177e4SLinus Torvalds return (xfrm_address_t *)&fl->fl6_dst; 8261da177e4SLinus Torvalds } 8271da177e4SLinus Torvalds return NULL; 8281da177e4SLinus Torvalds } 8291da177e4SLinus Torvalds 8301da177e4SLinus Torvalds static __inline__ 8311da177e4SLinus Torvalds xfrm_address_t *xfrm_flowi_saddr(struct flowi *fl, unsigned short family) 8321da177e4SLinus Torvalds { 8331da177e4SLinus Torvalds switch (family){ 8341da177e4SLinus Torvalds case AF_INET: 8351da177e4SLinus Torvalds return (xfrm_address_t *)&fl->fl4_src; 8361da177e4SLinus Torvalds case AF_INET6: 8371da177e4SLinus Torvalds return (xfrm_address_t *)&fl->fl6_src; 8381da177e4SLinus Torvalds } 8391da177e4SLinus Torvalds return NULL; 8401da177e4SLinus Torvalds } 8411da177e4SLinus Torvalds 8421da177e4SLinus Torvalds static __inline__ int 8431da177e4SLinus Torvalds __xfrm4_state_addr_check(struct xfrm_state *x, 8441da177e4SLinus Torvalds xfrm_address_t *daddr, xfrm_address_t *saddr) 8451da177e4SLinus Torvalds { 8461da177e4SLinus Torvalds if (daddr->a4 == x->id.daddr.a4 && 8471da177e4SLinus Torvalds (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4)) 8481da177e4SLinus Torvalds return 1; 8491da177e4SLinus Torvalds return 0; 8501da177e4SLinus Torvalds } 8511da177e4SLinus Torvalds 8521da177e4SLinus Torvalds static __inline__ int 8531da177e4SLinus Torvalds __xfrm6_state_addr_check(struct xfrm_state *x, 8541da177e4SLinus Torvalds xfrm_address_t *daddr, xfrm_address_t *saddr) 8551da177e4SLinus Torvalds { 8561da177e4SLinus Torvalds if (!ipv6_addr_cmp((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) && 8571da177e4SLinus Torvalds (!ipv6_addr_cmp((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr)|| 8581da177e4SLinus Torvalds ipv6_addr_any((struct in6_addr *)saddr) || 8591da177e4SLinus Torvalds ipv6_addr_any((struct in6_addr *)&x->props.saddr))) 8601da177e4SLinus Torvalds return 1; 8611da177e4SLinus Torvalds return 0; 8621da177e4SLinus Torvalds } 8631da177e4SLinus Torvalds 8641da177e4SLinus Torvalds static __inline__ int 8651da177e4SLinus Torvalds xfrm_state_addr_check(struct xfrm_state *x, 8661da177e4SLinus Torvalds xfrm_address_t *daddr, xfrm_address_t *saddr, 8671da177e4SLinus Torvalds unsigned short family) 8681da177e4SLinus Torvalds { 8691da177e4SLinus Torvalds switch (family) { 8701da177e4SLinus Torvalds case AF_INET: 8711da177e4SLinus Torvalds return __xfrm4_state_addr_check(x, daddr, saddr); 8721da177e4SLinus Torvalds case AF_INET6: 8731da177e4SLinus Torvalds return __xfrm6_state_addr_check(x, daddr, saddr); 8741da177e4SLinus Torvalds } 8751da177e4SLinus Torvalds return 0; 8761da177e4SLinus Torvalds } 8771da177e4SLinus Torvalds 878e53820deSMasahide NAKAMURA static __inline__ int 879e53820deSMasahide NAKAMURA xfrm_state_addr_flow_check(struct xfrm_state *x, struct flowi *fl, 880e53820deSMasahide NAKAMURA unsigned short family) 881e53820deSMasahide NAKAMURA { 882e53820deSMasahide NAKAMURA switch (family) { 883e53820deSMasahide NAKAMURA case AF_INET: 884e53820deSMasahide NAKAMURA return __xfrm4_state_addr_check(x, 885e53820deSMasahide NAKAMURA (xfrm_address_t *)&fl->fl4_dst, 886e53820deSMasahide NAKAMURA (xfrm_address_t *)&fl->fl4_src); 887e53820deSMasahide NAKAMURA case AF_INET6: 888e53820deSMasahide NAKAMURA return __xfrm6_state_addr_check(x, 889e53820deSMasahide NAKAMURA (xfrm_address_t *)&fl->fl6_dst, 890e53820deSMasahide NAKAMURA (xfrm_address_t *)&fl->fl6_src); 891e53820deSMasahide NAKAMURA } 892e53820deSMasahide NAKAMURA return 0; 893e53820deSMasahide NAKAMURA } 894e53820deSMasahide NAKAMURA 8951da177e4SLinus Torvalds static inline int xfrm_state_kern(struct xfrm_state *x) 8961da177e4SLinus Torvalds { 8971da177e4SLinus Torvalds return atomic_read(&x->tunnel_users); 8981da177e4SLinus Torvalds } 8991da177e4SLinus Torvalds 9005794708fSMasahide NAKAMURA static inline int xfrm_id_proto_match(u8 proto, u8 userproto) 9015794708fSMasahide NAKAMURA { 902dc00a525SMasahide NAKAMURA return (!userproto || proto == userproto || 903dc00a525SMasahide NAKAMURA (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH || 904dc00a525SMasahide NAKAMURA proto == IPPROTO_ESP || 905dc00a525SMasahide NAKAMURA proto == IPPROTO_COMP))); 9065794708fSMasahide NAKAMURA } 9075794708fSMasahide NAKAMURA 9081da177e4SLinus Torvalds /* 9091da177e4SLinus Torvalds * xfrm algorithm information 9101da177e4SLinus Torvalds */ 9111da177e4SLinus Torvalds struct xfrm_algo_auth_info { 9121da177e4SLinus Torvalds u16 icv_truncbits; 9131da177e4SLinus Torvalds u16 icv_fullbits; 9141da177e4SLinus Torvalds }; 9151da177e4SLinus Torvalds 9161da177e4SLinus Torvalds struct xfrm_algo_encr_info { 9171da177e4SLinus Torvalds u16 blockbits; 9181da177e4SLinus Torvalds u16 defkeybits; 9191da177e4SLinus Torvalds }; 9201da177e4SLinus Torvalds 9211da177e4SLinus Torvalds struct xfrm_algo_comp_info { 9221da177e4SLinus Torvalds u16 threshold; 9231da177e4SLinus Torvalds }; 9241da177e4SLinus Torvalds 9251da177e4SLinus Torvalds struct xfrm_algo_desc { 9261da177e4SLinus Torvalds char *name; 92704ff1260SHerbert Xu char *compat; 9281da177e4SLinus Torvalds u8 available:1; 9291da177e4SLinus Torvalds union { 9301da177e4SLinus Torvalds struct xfrm_algo_auth_info auth; 9311da177e4SLinus Torvalds struct xfrm_algo_encr_info encr; 9321da177e4SLinus Torvalds struct xfrm_algo_comp_info comp; 9331da177e4SLinus Torvalds } uinfo; 9341da177e4SLinus Torvalds struct sadb_alg desc; 9351da177e4SLinus Torvalds }; 9361da177e4SLinus Torvalds 9371da177e4SLinus Torvalds /* XFRM tunnel handlers. */ 9381da177e4SLinus Torvalds struct xfrm_tunnel { 9391da177e4SLinus Torvalds int (*handler)(struct sk_buff *skb); 940d2acc347SHerbert Xu int (*err_handler)(struct sk_buff *skb, __u32 info); 941d2acc347SHerbert Xu 942d2acc347SHerbert Xu struct xfrm_tunnel *next; 943d2acc347SHerbert Xu int priority; 9441da177e4SLinus Torvalds }; 9451da177e4SLinus Torvalds 9461da177e4SLinus Torvalds struct xfrm6_tunnel { 947d2acc347SHerbert Xu int (*handler)(struct sk_buff *skb); 948d2acc347SHerbert Xu int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt, 9491da177e4SLinus Torvalds int type, int code, int offset, __u32 info); 950d2acc347SHerbert Xu 951d2acc347SHerbert Xu struct xfrm6_tunnel *next; 952d2acc347SHerbert Xu int priority; 9531da177e4SLinus Torvalds }; 9541da177e4SLinus Torvalds 9551da177e4SLinus Torvalds extern void xfrm_init(void); 9561da177e4SLinus Torvalds extern void xfrm4_init(void); 9571da177e4SLinus Torvalds extern void xfrm6_init(void); 9581da177e4SLinus Torvalds extern void xfrm6_fini(void); 9591da177e4SLinus Torvalds extern void xfrm_state_init(void); 9601da177e4SLinus Torvalds extern void xfrm4_state_init(void); 9611da177e4SLinus Torvalds extern void xfrm6_state_init(void); 9621da177e4SLinus Torvalds extern void xfrm6_state_fini(void); 9631da177e4SLinus Torvalds 9641da177e4SLinus Torvalds extern int xfrm_state_walk(u8 proto, int (*func)(struct xfrm_state *, int, void*), void *); 9651da177e4SLinus Torvalds extern struct xfrm_state *xfrm_state_alloc(void); 9661da177e4SLinus Torvalds extern struct xfrm_state *xfrm_state_find(xfrm_address_t *daddr, xfrm_address_t *saddr, 9671da177e4SLinus Torvalds struct flowi *fl, struct xfrm_tmpl *tmpl, 9681da177e4SLinus Torvalds struct xfrm_policy *pol, int *err, 9691da177e4SLinus Torvalds unsigned short family); 9701da177e4SLinus Torvalds extern int xfrm_state_check_expire(struct xfrm_state *x); 9711da177e4SLinus Torvalds extern void xfrm_state_insert(struct xfrm_state *x); 9721da177e4SLinus Torvalds extern int xfrm_state_add(struct xfrm_state *x); 9731da177e4SLinus Torvalds extern int xfrm_state_update(struct xfrm_state *x); 9741da177e4SLinus Torvalds extern struct xfrm_state *xfrm_state_lookup(xfrm_address_t *daddr, u32 spi, u8 proto, unsigned short family); 975eb2971b6SMasahide NAKAMURA extern struct xfrm_state *xfrm_state_lookup_byaddr(xfrm_address_t *daddr, xfrm_address_t *saddr, u8 proto, unsigned short family); 9761da177e4SLinus Torvalds extern struct xfrm_state *xfrm_find_acq_byseq(u32 seq); 97726b15dadSJamal Hadi Salim extern int xfrm_state_delete(struct xfrm_state *x); 9781da177e4SLinus Torvalds extern void xfrm_state_flush(u8 proto); 9791da177e4SLinus Torvalds extern int xfrm_replay_check(struct xfrm_state *x, u32 seq); 9801da177e4SLinus Torvalds extern void xfrm_replay_advance(struct xfrm_state *x, u32 seq); 981f8cd5488SJamal Hadi Salim extern void xfrm_replay_notify(struct xfrm_state *x, int event); 9821da177e4SLinus Torvalds extern int xfrm_state_check(struct xfrm_state *x, struct sk_buff *skb); 9831da177e4SLinus Torvalds extern int xfrm_state_mtu(struct xfrm_state *x, int mtu); 98472cb6962SHerbert Xu extern int xfrm_init_state(struct xfrm_state *x); 9851da177e4SLinus Torvalds extern int xfrm4_rcv(struct sk_buff *skb); 9861da177e4SLinus Torvalds extern int xfrm4_output(struct sk_buff *skb); 9871da177e4SLinus Torvalds extern int xfrm4_tunnel_register(struct xfrm_tunnel *handler); 9881da177e4SLinus Torvalds extern int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler); 989d2acc347SHerbert Xu extern int xfrm6_rcv_spi(struct sk_buff *skb, u32 spi); 990951dbc8aSPatrick McHardy extern int xfrm6_rcv(struct sk_buff **pskb); 991fbd9a5b4SMasahide NAKAMURA extern int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr, 992fbd9a5b4SMasahide NAKAMURA xfrm_address_t *saddr, u8 proto); 9931da177e4SLinus Torvalds extern int xfrm6_tunnel_register(struct xfrm6_tunnel *handler); 9941da177e4SLinus Torvalds extern int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler); 9951da177e4SLinus Torvalds extern u32 xfrm6_tunnel_alloc_spi(xfrm_address_t *saddr); 9961da177e4SLinus Torvalds extern void xfrm6_tunnel_free_spi(xfrm_address_t *saddr); 9971da177e4SLinus Torvalds extern u32 xfrm6_tunnel_spi_lookup(xfrm_address_t *saddr); 9981da177e4SLinus Torvalds extern int xfrm6_output(struct sk_buff *skb); 999aee5adb4SMasahide NAKAMURA extern int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb, 1000aee5adb4SMasahide NAKAMURA u8 **prevhdr); 10011da177e4SLinus Torvalds 10021da177e4SLinus Torvalds #ifdef CONFIG_XFRM 10031da177e4SLinus Torvalds extern int xfrm4_rcv_encap(struct sk_buff *skb, __u16 encap_type); 10041da177e4SLinus Torvalds extern int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen); 10051da177e4SLinus Torvalds extern int xfrm_dst_lookup(struct xfrm_dst **dst, struct flowi *fl, unsigned short family); 10061da177e4SLinus Torvalds #else 10071da177e4SLinus Torvalds static inline int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen) 10081da177e4SLinus Torvalds { 10091da177e4SLinus Torvalds return -ENOPROTOOPT; 10101da177e4SLinus Torvalds } 10111da177e4SLinus Torvalds 10121da177e4SLinus Torvalds static inline int xfrm4_rcv_encap(struct sk_buff *skb, __u16 encap_type) 10131da177e4SLinus Torvalds { 10141da177e4SLinus Torvalds /* should not happen */ 10151da177e4SLinus Torvalds kfree_skb(skb); 10161da177e4SLinus Torvalds return 0; 10171da177e4SLinus Torvalds } 10181da177e4SLinus Torvalds static inline int xfrm_dst_lookup(struct xfrm_dst **dst, struct flowi *fl, unsigned short family) 10191da177e4SLinus Torvalds { 10201da177e4SLinus Torvalds return -EINVAL; 10211da177e4SLinus Torvalds } 10221da177e4SLinus Torvalds #endif 10231da177e4SLinus Torvalds 1024dd0fc66fSAl Viro struct xfrm_policy *xfrm_policy_alloc(gfp_t gfp); 10251da177e4SLinus Torvalds extern int xfrm_policy_walk(int (*func)(struct xfrm_policy *, int, int, void*), void *); 10261da177e4SLinus Torvalds int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl); 1027df71837dSTrent Jaeger struct xfrm_policy *xfrm_policy_bysel_ctx(int dir, struct xfrm_selector *sel, 1028df71837dSTrent Jaeger struct xfrm_sec_ctx *ctx, int delete); 10291da177e4SLinus Torvalds struct xfrm_policy *xfrm_policy_byid(int dir, u32 id, int delete); 10301da177e4SLinus Torvalds void xfrm_policy_flush(void); 10311da177e4SLinus Torvalds u32 xfrm_get_acqseq(void); 10321da177e4SLinus Torvalds void xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi); 10331da177e4SLinus Torvalds struct xfrm_state * xfrm_find_acq(u8 mode, u32 reqid, u8 proto, 10341da177e4SLinus Torvalds xfrm_address_t *daddr, xfrm_address_t *saddr, 10351da177e4SLinus Torvalds int create, unsigned short family); 10361da177e4SLinus Torvalds extern void xfrm_policy_flush(void); 10371da177e4SLinus Torvalds extern int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol); 10381da177e4SLinus Torvalds extern int xfrm_flush_bundles(void); 1039399c180aSDavid S. Miller extern void xfrm_flush_all_bundles(void); 1040e53820deSMasahide NAKAMURA extern int xfrm_bundle_ok(struct xfrm_dst *xdst, struct flowi *fl, int family, int strict); 10411da177e4SLinus Torvalds extern void xfrm_init_pmtu(struct dst_entry *dst); 10421da177e4SLinus Torvalds 10431da177e4SLinus Torvalds extern wait_queue_head_t km_waitq; 10441da177e4SLinus Torvalds extern int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, u16 sport); 10456c5c8ca7SJamal Hadi Salim extern void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 pid); 10461da177e4SLinus Torvalds 10471da177e4SLinus Torvalds extern void xfrm_input_init(void); 10481da177e4SLinus Torvalds extern int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, u32 *spi, u32 *seq); 10491da177e4SLinus Torvalds 10501da177e4SLinus Torvalds extern void xfrm_probe_algs(void); 10511da177e4SLinus Torvalds extern int xfrm_count_auth_supported(void); 10521da177e4SLinus Torvalds extern int xfrm_count_enc_supported(void); 10531da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx); 10541da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx); 10551da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id); 10561da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id); 10571da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id); 10581da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_aalg_get_byname(char *name, int probe); 10591da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_ealg_get_byname(char *name, int probe); 10601da177e4SLinus Torvalds extern struct xfrm_algo_desc *xfrm_calg_get_byname(char *name, int probe); 10611da177e4SLinus Torvalds 106207d4ee58SHerbert Xu struct hash_desc; 10639409f38aSHerbert Xu struct scatterlist; 106407d4ee58SHerbert Xu typedef int (icv_update_fn_t)(struct hash_desc *, struct scatterlist *, 106507d4ee58SHerbert Xu unsigned int); 10661da177e4SLinus Torvalds 106707d4ee58SHerbert Xu extern int skb_icv_walk(const struct sk_buff *skb, struct hash_desc *tfm, 10681da177e4SLinus Torvalds int offset, int len, icv_update_fn_t icv_update); 10691da177e4SLinus Torvalds 10701da177e4SLinus Torvalds static inline int xfrm_addr_cmp(xfrm_address_t *a, xfrm_address_t *b, 10711da177e4SLinus Torvalds int family) 10721da177e4SLinus Torvalds { 10731da177e4SLinus Torvalds switch (family) { 10741da177e4SLinus Torvalds default: 10751da177e4SLinus Torvalds case AF_INET: 10761da177e4SLinus Torvalds return a->a4 - b->a4; 10771da177e4SLinus Torvalds case AF_INET6: 10781da177e4SLinus Torvalds return ipv6_addr_cmp((struct in6_addr *)a, 10791da177e4SLinus Torvalds (struct in6_addr *)b); 10801da177e4SLinus Torvalds } 10811da177e4SLinus Torvalds } 10821da177e4SLinus Torvalds 108377d8d7a6SHerbert Xu static inline int xfrm_policy_id2dir(u32 index) 108477d8d7a6SHerbert Xu { 108577d8d7a6SHerbert Xu return index & 7; 108677d8d7a6SHerbert Xu } 108777d8d7a6SHerbert Xu 1088f8cd5488SJamal Hadi Salim static inline int xfrm_aevent_is_on(void) 1089f8cd5488SJamal Hadi Salim { 1090be33690dSPatrick McHardy struct sock *nlsk; 1091be33690dSPatrick McHardy int ret = 0; 1092be33690dSPatrick McHardy 1093be33690dSPatrick McHardy rcu_read_lock(); 1094be33690dSPatrick McHardy nlsk = rcu_dereference(xfrm_nl); 1095be33690dSPatrick McHardy if (nlsk) 1096be33690dSPatrick McHardy ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS); 1097be33690dSPatrick McHardy rcu_read_unlock(); 1098be33690dSPatrick McHardy return ret; 1099f8cd5488SJamal Hadi Salim } 1100f8cd5488SJamal Hadi Salim 1101f8cd5488SJamal Hadi Salim static inline void xfrm_aevent_doreplay(struct xfrm_state *x) 1102f8cd5488SJamal Hadi Salim { 1103f8cd5488SJamal Hadi Salim if (xfrm_aevent_is_on()) 1104f8cd5488SJamal Hadi Salim xfrm_replay_notify(x, XFRM_REPLAY_UPDATE); 1105f8cd5488SJamal Hadi Salim } 1106f8cd5488SJamal Hadi Salim 1107f8cd5488SJamal Hadi Salim 11081da177e4SLinus Torvalds #endif /* _NET_XFRM_H */ 1109