X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=include%2Fnet%2Fxfrm.h;h=182f10b29d88111ffb3ab60495b1323fe43408c5;hb=d63bddbe90c4fd924b2155ca92a879393d856170;hp=77be396ca633c93888767178915d1bd6f5e5a2ca;hpb=dcf397f037f52add9945eced57ca300ab6a4413c;p=linux-2.6 diff --git a/include/net/xfrm.h b/include/net/xfrm.h index 77be396ca6..182f10b29d 100644 --- a/include/net/xfrm.h +++ b/include/net/xfrm.h @@ -37,6 +37,8 @@ extern struct sock *xfrm_nl; extern u32 sysctl_xfrm_aevent_etime; extern u32 sysctl_xfrm_aevent_rseqth; +extern int sysctl_xfrm_larval_drop; +extern u32 sysctl_xfrm_acq_expires; extern struct mutex xfrm_cfg_mutex; @@ -181,12 +183,13 @@ struct xfrm_state struct timer_list timer; /* Last used time */ - u64 lastused; + unsigned long lastused; /* Reference to data common to all the instances of this * transformer. */ struct xfrm_type *type; - struct xfrm_mode *mode; + struct xfrm_mode *inner_mode; + struct xfrm_mode *outer_mode; /* Security context */ struct xfrm_sec_ctx *security; @@ -224,24 +227,22 @@ struct km_event u32 event; }; +struct net_device; struct xfrm_type; struct xfrm_dst; struct xfrm_policy_afinfo { unsigned short family; - 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); + struct dst_entry *(*dst_lookup)(int tos, xfrm_address_t *saddr, + xfrm_address_t *daddr); int (*get_saddr)(xfrm_address_t *saddr, xfrm_address_t *daddr); struct dst_entry *(*find_bundle)(struct flowi *fl, struct xfrm_policy *policy); - int (*bundle_create)(struct xfrm_policy *policy, - struct xfrm_state **xfrm, - int nx, - struct flowi *fl, - struct dst_entry **dst_p); void (*decode_session)(struct sk_buff *skb, struct flowi *fl); + int (*get_tos)(struct flowi *fl); + int (*fill_dst)(struct xfrm_dst *xdst, + struct net_device *dev); }; extern int xfrm_policy_register_afinfo(struct xfrm_policy_afinfo *afinfo); @@ -255,7 +256,12 @@ 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; + unsigned int family; + unsigned int proto; + unsigned int eth_proto; + struct module *owner; + struct xfrm_type *type_map[IPPROTO_MAX]; + struct xfrm_mode *mode_map[XFRM_MODE_MAX]; int (*init_flags)(struct xfrm_state *x); void (*init_tempsel)(struct xfrm_state *x, struct flowi *fl, struct xfrm_tmpl *tmpl, @@ -263,12 +269,16 @@ struct xfrm_state_afinfo { int (*tmpl_sort)(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n); int (*state_sort)(struct xfrm_state **dst, struct xfrm_state **src, int n); int (*output)(struct sk_buff *skb); + int (*extract_input)(struct xfrm_state *x, + struct sk_buff *skb); + int (*extract_output)(struct xfrm_state *x, + struct sk_buff *skb); + int (*transport_finish)(struct sk_buff *skb, + int async); }; 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); @@ -280,6 +290,8 @@ struct xfrm_type __u8 flags; #define XFRM_TYPE_NON_FRAGMENT 1 #define XFRM_TYPE_REPLAY_PROT 2 +#define XFRM_TYPE_LOCAL_COADDR 4 +#define XFRM_TYPE_REMOTE_COADDR 8 int (*init_state)(struct xfrm_state *x); void (*destructor)(struct xfrm_state *); @@ -287,18 +299,35 @@ struct xfrm_type int (*output)(struct xfrm_state *, struct sk_buff *pskb); int (*reject)(struct xfrm_state *, struct sk_buff *, struct flowi *); int (*hdr_offset)(struct xfrm_state *, struct sk_buff *, u8 **); - xfrm_address_t *(*local_addr)(struct xfrm_state *, xfrm_address_t *); - xfrm_address_t *(*remote_addr)(struct xfrm_state *, xfrm_address_t *); /* Estimate maximal size of result of transformation of a dgram */ u32 (*get_mtu)(struct xfrm_state *, int size); }; 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 { + /* + * Remove encapsulation header. + * + * The IP header will be moved over the top of the encapsulation + * header. + * + * On entry, the transport header shall point to where the IP header + * should be and the network header shall be set to where the IP + * header currently is. skb->data shall point to the start of the + * payload. + */ + int (*input2)(struct xfrm_state *x, struct sk_buff *skb); + + /* + * This is the actual input entry point. + * + * For transport mode and equivalent this would be identical to + * input2 (which does not need to be set). While tunnel mode + * and equivalent would set this to the tunnel encapsulation function + * xfrm4_prepare_input that would in turn call input2. + */ int (*input)(struct xfrm_state *x, struct sk_buff *skb); /* @@ -312,16 +341,32 @@ struct xfrm_mode { * header. The value of the network header will always point * to the top IP header while skb->data will point to the payload. */ - int (*output)(struct xfrm_state *x,struct sk_buff *skb); + int (*output2)(struct xfrm_state *x,struct sk_buff *skb); + /* + * This is the actual output entry point. + * + * For transport mode and equivalent this would be identical to + * output2 (which does not need to be set). While tunnel mode + * and equivalent would set this to a tunnel encapsulation function + * (xfrm4_prepare_output or xfrm6_prepare_output) that would in turn + * call output2. + */ + int (*output)(struct xfrm_state *x, struct sk_buff *skb); + + struct xfrm_state_afinfo *afinfo; struct module *owner; unsigned int encap; + int flags; +}; + +/* Flags for xfrm_mode. */ +enum { + XFRM_MODE_FLAG_TUNNEL = 1, }; 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 { @@ -449,6 +494,51 @@ struct xfrm_skb_cb { #define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0])) +/* + * This structure is used by the afinfo prepare_input/prepare_output functions + * to transmit header information to the mode input/output functions. + */ +struct xfrm_mode_skb_cb { + union { + struct inet_skb_parm h4; + struct inet6_skb_parm h6; + } header; + + /* Copied from header for IPv4, always set to zero and DF for IPv6. */ + __be16 id; + __be16 frag_off; + + /* TOS for IPv4, class for IPv6. */ + u8 tos; + + /* TTL for IPv4, hop limitfor IPv6. */ + u8 ttl; + + /* Protocol for IPv4, NH for IPv6. */ + u8 protocol; + + /* Used by IPv6 only, zero for IPv4. */ + u8 flow_lbl[3]; +}; + +#define XFRM_MODE_SKB_CB(__skb) ((struct xfrm_mode_skb_cb *)&((__skb)->cb[0])) + +/* + * This structure is used by the input processing to locate the SPI and + * related information. + */ +struct xfrm_spi_skb_cb { + union { + struct inet_skb_parm h4; + struct inet6_skb_parm h6; + } header; + + unsigned int daddroff; + unsigned int family; +}; + +#define XFRM_SPI_SKB_CB(__skb) ((struct xfrm_spi_skb_cb *)&((__skb)->cb[0])) + /* Audit Information */ struct xfrm_audit { @@ -1045,13 +1135,34 @@ extern void xfrm_replay_advance(struct xfrm_state *x, __be32 seq); extern void xfrm_replay_notify(struct xfrm_state *x, int event); extern int xfrm_state_mtu(struct xfrm_state *x, int mtu); extern int xfrm_init_state(struct xfrm_state *x); +extern int xfrm_prepare_input(struct xfrm_state *x, struct sk_buff *skb); +extern int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, + int encap_type); +extern int xfrm_input_resume(struct sk_buff *skb, int nexthdr); +extern int xfrm_output_resume(struct sk_buff *skb, int err); extern int xfrm_output(struct sk_buff *skb); +extern int xfrm4_extract_header(struct sk_buff *skb); +extern int xfrm4_extract_input(struct xfrm_state *x, struct sk_buff *skb); +extern int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi, + int encap_type); +extern int xfrm4_transport_finish(struct sk_buff *skb, int async); extern int xfrm4_rcv(struct sk_buff *skb); + +static inline int xfrm4_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi) +{ + return xfrm4_rcv_encap(skb, nexthdr, spi, 0); +} + +extern int xfrm4_extract_output(struct xfrm_state *x, struct sk_buff *skb); +extern int xfrm4_prepare_output(struct xfrm_state *x, struct sk_buff *skb); extern int xfrm4_output(struct sk_buff *skb); extern int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family); extern int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family); -extern int xfrm6_rcv_spi(struct sk_buff *skb, __be32 spi); -extern int xfrm6_rcv(struct sk_buff **pskb); +extern int xfrm6_extract_header(struct sk_buff *skb); +extern int xfrm6_extract_input(struct xfrm_state *x, struct sk_buff *skb); +extern int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi); +extern int xfrm6_transport_finish(struct sk_buff *skb, int async); +extern int xfrm6_rcv(struct sk_buff *skb); extern int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr, xfrm_address_t *saddr, u8 proto); extern int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family); @@ -1059,6 +1170,8 @@ extern int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short extern __be32 xfrm6_tunnel_alloc_spi(xfrm_address_t *saddr); extern void xfrm6_tunnel_free_spi(xfrm_address_t *saddr); extern __be32 xfrm6_tunnel_spi_lookup(xfrm_address_t *saddr); +extern int xfrm6_extract_output(struct xfrm_state *x, struct sk_buff *skb); +extern int xfrm6_prepare_output(struct xfrm_state *x, struct sk_buff *skb); extern int xfrm6_output(struct sk_buff *skb); extern int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb, u8 **prevhdr); @@ -1066,7 +1179,6 @@ extern int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb, #ifdef CONFIG_XFRM extern int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb); extern int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen); -extern int xfrm_dst_lookup(struct xfrm_dst **dst, struct flowi *fl, unsigned short family); #else static inline int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen) { @@ -1079,11 +1191,6 @@ static inline int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb) kfree_skb(skb); return 0; } - -static inline int xfrm_dst_lookup(struct xfrm_dst **dst, struct flowi *fl, unsigned short family) -{ - return -EINVAL; -} #endif struct xfrm_policy *xfrm_policy_alloc(gfp_t gfp); @@ -1104,7 +1211,6 @@ extern int xfrm_policy_flush(u8 type, struct xfrm_audit *audit_info); extern int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol); extern int xfrm_bundle_ok(struct xfrm_policy *pol, struct xfrm_dst *xdst, struct flowi *fl, int family, int strict); -extern void xfrm_init_pmtu(struct dst_entry *dst); #ifdef CONFIG_XFRM_MIGRATE extern int km_migrate(struct xfrm_selector *sel, u8 dir, u8 type, @@ -1175,10 +1281,15 @@ static inline int xfrm_aevent_is_on(void) return ret; } +static inline int xfrm_alg_len(struct xfrm_algo *alg) +{ + return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); +} + #ifdef CONFIG_XFRM_MIGRATE static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig) { - return (struct xfrm_algo *)kmemdup(orig, sizeof(*orig) + orig->alg_key_len, GFP_KERNEL); + return kmemdup(orig, xfrm_alg_len(orig), GFP_KERNEL); } static inline void xfrm_states_put(struct xfrm_state **states, int n)