X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=include%2Fnet%2Fxfrm.h;h=9c5ee9f20b65b7ef336652fc640331c67bc22c8f;hb=3967a72a825e44bff5d10f516e90b6f59f59e599;hp=b5c9b1028583c6a08f6618a8f86c12105f8d5f00;hpb=c7b5ebbddf7bcd3651947760f423e3783bbe6573;p=linux-2.6.git diff --git a/include/net/xfrm.h b/include/net/xfrm.h index b5c9b1028..9c5ee9f20 100644 --- a/include/net/xfrm.h +++ b/include/net/xfrm.h @@ -1,14 +1,17 @@ #ifndef _NET_XFRM_H #define _NET_XFRM_H +#include +#include #include #include #include #include -#include +#include #include #include #include +#include #include #include @@ -17,8 +20,14 @@ #include #define XFRM_ALIGN8(len) (((len) + 7) & ~7) +#define MODULE_ALIAS_XFRM_MODE(family, encap) \ + MODULE_ALIAS("xfrm-mode-" __stringify(family) "-" __stringify(encap)) -extern struct semaphore xfrm_cfg_sem; +extern struct sock *xfrm_nl; +extern u32 sysctl_xfrm_aevent_etime; +extern u32 sysctl_xfrm_aevent_rseqth; + +extern struct mutex xfrm_cfg_mutex; /* Organization of SPD aka "XFRM rules" ------------------------------------ @@ -133,6 +142,21 @@ struct xfrm_state /* State for replay detection */ struct xfrm_replay_state replay; + /* Replay detection state at the time we sent the last notification */ + struct xfrm_replay_state preplay; + + /* internal flag that only holds state for delayed aevent at the + * moment + */ + u32 xflags; + + /* Replay detection notification settings */ + u32 replay_maxage; + u32 replay_maxdiff; + + /* Replay detection notification timer */ + struct timer_list rtimer; + /* Statistics */ struct xfrm_stats stats; @@ -142,12 +166,19 @@ struct xfrm_state /* Reference to data common to all the instances of this * transformer. */ struct xfrm_type *type; + struct xfrm_mode *mode; + + /* Security context */ + struct xfrm_sec_ctx *security; /* Private data of this transformer, format is opaque, * interpreted by xfrm_type methods. */ void *data; }; +/* xflags - make enum if more show up */ +#define XFRM_TIME_DEFER 1 + enum { XFRM_STATE_VOID, XFRM_STATE_ACQ, @@ -157,12 +188,27 @@ enum { XFRM_STATE_DEAD }; +/* callback structure passed from either netlink or pfkey */ +struct km_event +{ + union { + u32 hard; + u32 proto; + u32 byid; + u32 aevent; + } data; + + u32 seq; + u32 pid; + u32 event; +}; + struct xfrm_type; struct xfrm_dst; struct xfrm_policy_afinfo { unsigned short family; - rwlock_t lock; - struct xfrm_type_map *type_map; + struct xfrm_type *type_map[IPPROTO_MAX]; + struct xfrm_mode *mode_map[XFRM_MODE_MAX]; struct dst_ops *dst_ops; void (*garbage_collect)(void); int (*dst_lookup)(struct xfrm_dst **dst, struct flowi *fl); @@ -178,17 +224,20 @@ struct xfrm_policy_afinfo { extern int xfrm_policy_register_afinfo(struct xfrm_policy_afinfo *afinfo); extern int xfrm_policy_unregister_afinfo(struct xfrm_policy_afinfo *afinfo); -extern struct xfrm_policy_afinfo *xfrm_policy_get_afinfo(unsigned short family); -extern void xfrm_policy_put_afinfo(struct xfrm_policy_afinfo *afinfo); - +extern void km_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c); +extern void km_state_notify(struct xfrm_state *x, struct km_event *c); #define XFRM_ACQ_EXPIRES 30 struct xfrm_tmpl; +extern int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol); +extern void km_state_expired(struct xfrm_state *x, int hard, u32 pid); +extern int __xfrm_state_delete(struct xfrm_state *x); + struct xfrm_state_afinfo { unsigned short family; - rwlock_t lock; struct list_head *state_bydst; struct list_head *state_byspi; + int (*init_flags)(struct xfrm_state *x); void (*init_tempsel)(struct xfrm_state *x, struct flowi *fl, struct xfrm_tmpl *tmpl, xfrm_address_t *daddr, xfrm_address_t *saddr); @@ -200,37 +249,41 @@ struct xfrm_state_afinfo { extern int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo); extern int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo); -extern struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned short family); -extern void xfrm_state_put_afinfo(struct xfrm_state_afinfo *afinfo); extern void xfrm_state_delete_tunnel(struct xfrm_state *x); -struct xfrm_decap_state; struct xfrm_type { char *description; struct module *owner; __u8 proto; - int (*init_state)(struct xfrm_state *x, void *args); + int (*init_state)(struct xfrm_state *x); void (*destructor)(struct xfrm_state *); - int (*input)(struct xfrm_state *, struct xfrm_decap_state *, struct sk_buff *skb); - int (*post_input)(struct xfrm_state *, struct xfrm_decap_state *, struct sk_buff *skb); - int (*output)(struct sk_buff *pskb); + int (*input)(struct xfrm_state *, struct sk_buff *skb); + int (*output)(struct xfrm_state *, struct sk_buff *pskb); /* Estimate maximal size of result of transformation of a dgram */ u32 (*get_max_size)(struct xfrm_state *, int size); }; -struct xfrm_type_map { - rwlock_t lock; - struct xfrm_type *map[256]; -}; - extern int xfrm_register_type(struct xfrm_type *type, unsigned short family); extern int xfrm_unregister_type(struct xfrm_type *type, unsigned short family); extern struct xfrm_type *xfrm_get_type(u8 proto, unsigned short family); extern void xfrm_put_type(struct xfrm_type *type); +struct xfrm_mode { + int (*input)(struct xfrm_state *x, struct sk_buff *skb); + int (*output)(struct sk_buff *skb); + + struct module *owner; + unsigned int encap; +}; + +extern int xfrm_register_mode(struct xfrm_mode *mode, int family); +extern int xfrm_unregister_mode(struct xfrm_mode *mode, int family); +extern struct xfrm_mode *xfrm_get_mode(unsigned int encap, int family); +extern void xfrm_put_mode(struct xfrm_mode *mode); + struct xfrm_tmpl { /* id in template is interpreted as: @@ -284,20 +337,35 @@ struct xfrm_policy __u8 flags; __u8 dead; __u8 xfrm_nr; + struct xfrm_sec_ctx *security; struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH]; }; -#define XFRM_KM_TIMEOUT 30 +#define XFRM_KM_TIMEOUT 30 +/* which seqno */ +#define XFRM_REPLAY_SEQ 1 +#define XFRM_REPLAY_OSEQ 2 +#define XFRM_REPLAY_SEQ_MASK 3 +/* what happened */ +#define XFRM_REPLAY_UPDATE XFRM_AE_CR +#define XFRM_REPLAY_TIMEOUT XFRM_AE_CE + +/* default aevent timeout in units of 100ms */ +#define XFRM_AE_ETIME 10 +/* Async Event timer multiplier */ +#define XFRM_AE_ETH_M 10 +/* default seq threshold size */ +#define XFRM_AE_SEQT_SIZE 2 struct xfrm_mgr { struct list_head list; char *id; - int (*notify)(struct xfrm_state *x, int event); + int (*notify)(struct xfrm_state *x, struct km_event *c); int (*acquire)(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *xp, int dir); struct xfrm_policy *(*compile_policy)(u16 family, int opt, u8 *data, int len, int *dir); int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, u16 sport); - int (*notify_policy)(struct xfrm_policy *x, int dir, int event); + int (*notify_policy)(struct xfrm_policy *x, int dir, struct km_event *c); }; extern int xfrm_register_km(struct xfrm_mgr *km); @@ -384,6 +452,11 @@ unsigned xfrm_spi_hash(xfrm_address_t *addr, u32 spi, u8 proto, unsigned short f extern void __xfrm_state_destroy(struct xfrm_state *); +static inline void __xfrm_state_put(struct xfrm_state *x) +{ + atomic_dec(&x->refcnt); +} + static inline void xfrm_state_put(struct xfrm_state *x) { if (atomic_dec_and_test(&x->refcnt)) @@ -496,6 +569,25 @@ xfrm_selector_match(struct xfrm_selector *sel, struct flowi *fl, return 0; } +#ifdef CONFIG_SECURITY_NETWORK_XFRM +/* If neither has a context --> match + * Otherwise, both must have a context and the sids, doi, alg must match + */ +static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) +{ + return ((!s1 && !s2) || + (s1 && s2 && + (s1->ctx_sid == s2->ctx_sid) && + (s1->ctx_doi == s2->ctx_doi) && + (s1->ctx_alg == s2->ctx_alg))); +} +#else +static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) +{ + return 1; +} +#endif + /* A struct encoding bundle of transformations to apply to some set of flow. * * dst->child points to the next element of bundle. @@ -515,27 +607,27 @@ struct xfrm_dst struct rtable rt; struct rt6_info rt6; } u; + struct dst_entry *route; + u32 route_mtu_cached; + u32 child_mtu_cached; + u32 route_cookie; + u32 path_cookie; }; -/* Decapsulation state, used by the input to store data during - * decapsulation procedure, to be used later (during the policy - * check - */ -struct xfrm_decap_state { - char decap_data[20]; - __u16 decap_type; -}; - -struct sec_decap_state { - struct xfrm_state *xvec; - struct xfrm_decap_state decap; -}; +static inline void xfrm_dst_destroy(struct xfrm_dst *xdst) +{ + dst_release(xdst->route); + if (likely(xdst->u.dst.xfrm)) + xfrm_state_put(xdst->u.dst.xfrm); +} + +extern void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev); struct sec_path { atomic_t refcnt; int len; - struct sec_decap_state x[XFRM_MAX_DEPTH]; + struct xfrm_state *xvec[XFRM_MAX_DEPTH]; }; static inline struct sec_path * @@ -601,7 +693,7 @@ static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *sk if (sk && sk->sk_policy[XFRM_POLICY_IN]) return __xfrm_policy_check(sk, dir, skb, family); - return !xfrm_policy_list[dir] || + return (!xfrm_policy_list[dir] && !skb->sp) || (skb->dst->flags & DST_NOPOLICY) || __xfrm_policy_check(sk, dir, skb, family); } @@ -616,7 +708,7 @@ static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *s return xfrm_policy_check(sk, dir, skb, AF_INET6); } - +extern int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, unsigned short family); extern int __xfrm_route_forward(struct sk_buff *skb, unsigned short family); static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family) @@ -645,7 +737,7 @@ static inline int xfrm_sk_clone_policy(struct sock *sk) return 0; } -extern void xfrm_policy_delete(struct xfrm_policy *pol, int dir); +extern int xfrm_policy_delete(struct xfrm_policy *pol, int dir); static inline void xfrm_sk_free_policy(struct sock *sk) { @@ -775,23 +867,27 @@ struct xfrm_algo_desc { /* XFRM tunnel handlers. */ struct xfrm_tunnel { int (*handler)(struct sk_buff *skb); - void (*err_handler)(struct sk_buff *skb, void *info); + int (*err_handler)(struct sk_buff *skb, __u32 info); + + struct xfrm_tunnel *next; + int priority; }; struct xfrm6_tunnel { - int (*handler)(struct sk_buff **pskb, unsigned int *nhoffp); - void (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt, - int type, int code, int offset, __u32 info); + int (*handler)(struct sk_buff *skb); + int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt, + int type, int code, int offset, __u32 info); + + struct xfrm6_tunnel *next; + int priority; }; extern void xfrm_init(void); extern void xfrm4_init(void); -extern void xfrm4_fini(void); extern void xfrm6_init(void); extern void xfrm6_fini(void); extern void xfrm_state_init(void); extern void xfrm4_state_init(void); -extern void xfrm4_state_fini(void); extern void xfrm6_state_init(void); extern void xfrm6_state_fini(void); @@ -805,27 +901,28 @@ extern int xfrm_state_check_expire(struct xfrm_state *x); extern void xfrm_state_insert(struct xfrm_state *x); extern int xfrm_state_add(struct xfrm_state *x); extern int xfrm_state_update(struct xfrm_state *x); -extern int xfrm_state_check_space(struct xfrm_state *x, struct sk_buff *skb); extern struct xfrm_state *xfrm_state_lookup(xfrm_address_t *daddr, u32 spi, u8 proto, unsigned short family); extern struct xfrm_state *xfrm_find_acq_byseq(u32 seq); -extern void xfrm_state_delete(struct xfrm_state *x); +extern int xfrm_state_delete(struct xfrm_state *x); extern void xfrm_state_flush(u8 proto); extern int xfrm_replay_check(struct xfrm_state *x, u32 seq); extern void xfrm_replay_advance(struct xfrm_state *x, u32 seq); -extern int xfrm_check_selectors(struct xfrm_state **x, int n, struct flowi *fl); +extern void xfrm_replay_notify(struct xfrm_state *x, int event); extern int xfrm_state_check(struct xfrm_state *x, struct sk_buff *skb); +extern int xfrm_state_mtu(struct xfrm_state *x, int mtu); +extern int xfrm_init_state(struct xfrm_state *x); extern int xfrm4_rcv(struct sk_buff *skb); -extern int xfrm4_output(struct sk_buff **pskb); +extern int xfrm4_output(struct sk_buff *skb); extern int xfrm4_tunnel_register(struct xfrm_tunnel *handler); extern int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler); -extern int xfrm6_rcv_spi(struct sk_buff **pskb, unsigned int *nhoffp, u32 spi); -extern int xfrm6_rcv(struct sk_buff **pskb, unsigned int *nhoffp); +extern int xfrm6_rcv_spi(struct sk_buff *skb, u32 spi); +extern int xfrm6_rcv(struct sk_buff **pskb); extern int xfrm6_tunnel_register(struct xfrm6_tunnel *handler); extern int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler); extern u32 xfrm6_tunnel_alloc_spi(xfrm_address_t *saddr); extern void xfrm6_tunnel_free_spi(xfrm_address_t *saddr); extern u32 xfrm6_tunnel_spi_lookup(xfrm_address_t *saddr); -extern int xfrm6_output(struct sk_buff **pskb); +extern int xfrm6_output(struct sk_buff *skb); #ifdef CONFIG_XFRM extern int xfrm4_rcv_encap(struct sk_buff *skb, __u16 encap_type); @@ -849,12 +946,11 @@ static inline int xfrm_dst_lookup(struct xfrm_dst **dst, struct flowi *fl, unsig } #endif -void xfrm_policy_init(void); -struct xfrm_policy *xfrm_policy_alloc(int gfp); +struct xfrm_policy *xfrm_policy_alloc(gfp_t gfp); extern int xfrm_policy_walk(int (*func)(struct xfrm_policy *, int, int, void*), void *); int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl); -struct xfrm_policy *xfrm_policy_bysel(int dir, struct xfrm_selector *sel, - int delete); +struct xfrm_policy *xfrm_policy_bysel_ctx(int dir, struct xfrm_selector *sel, + struct xfrm_sec_ctx *ctx, int delete); struct xfrm_policy *xfrm_policy_byid(int dir, u32 id, int delete); void xfrm_policy_flush(void); u32 xfrm_get_acqseq(void); @@ -863,16 +959,15 @@ struct xfrm_state * xfrm_find_acq(u8 mode, u32 reqid, u8 proto, xfrm_address_t *daddr, xfrm_address_t *saddr, int create, unsigned short family); extern void xfrm_policy_flush(void); -extern void xfrm_policy_kill(struct xfrm_policy *); extern int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol); -extern struct xfrm_policy *xfrm_sk_policy_lookup(struct sock *sk, int dir, struct flowi *fl); extern int xfrm_flush_bundles(void); +extern void xfrm_flush_all_bundles(void); +extern int xfrm_bundle_ok(struct xfrm_dst *xdst, struct flowi *fl, int family); +extern void xfrm_init_pmtu(struct dst_entry *dst); extern wait_queue_head_t km_waitq; -extern void km_state_expired(struct xfrm_state *x, int hard); -extern int km_query(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *pol); extern int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, u16 sport); -extern void km_policy_expired(struct xfrm_policy *pol, int dir, int hard); +extern void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 pid); extern void xfrm_input_init(void); extern int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, u32 *spi, u32 *seq); @@ -882,13 +977,12 @@ extern int xfrm_count_auth_supported(void); extern int xfrm_count_enc_supported(void); extern struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx); extern struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx); -extern struct xfrm_algo_desc *xfrm_calg_get_byidx(unsigned int idx); extern struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id); extern struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id); extern struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id); -extern struct xfrm_algo_desc *xfrm_aalg_get_byname(char *name); -extern struct xfrm_algo_desc *xfrm_ealg_get_byname(char *name); -extern struct xfrm_algo_desc *xfrm_calg_get_byname(char *name); +extern struct xfrm_algo_desc *xfrm_aalg_get_byname(char *name, int probe); +extern struct xfrm_algo_desc *xfrm_ealg_get_byname(char *name, int probe); +extern struct xfrm_algo_desc *xfrm_calg_get_byname(char *name, int probe); struct crypto_tfm; typedef void (icv_update_fn_t)(struct crypto_tfm *, struct scatterlist *, unsigned int); @@ -909,4 +1003,29 @@ static inline int xfrm_addr_cmp(xfrm_address_t *a, xfrm_address_t *b, } } +static inline int xfrm_policy_id2dir(u32 index) +{ + return index & 7; +} + +static inline int xfrm_aevent_is_on(void) +{ + struct sock *nlsk; + int ret = 0; + + rcu_read_lock(); + nlsk = rcu_dereference(xfrm_nl); + if (nlsk) + ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS); + rcu_read_unlock(); + return ret; +} + +static inline void xfrm_aevent_doreplay(struct xfrm_state *x) +{ + if (xfrm_aevent_is_on()) + xfrm_replay_notify(x, XFRM_REPLAY_UPDATE); +} + + #endif /* _NET_XFRM_H */