/* * * Generic internet FLOW. * */ #ifndef _NET_FLOW_H #define _NET_FLOW_H #include #include struct flowi_common { int flowic_oif; int flowic_iif; __u32 flowic_mark; __u8 flowic_tos; __u8 flowic_scope; __u8 flowic_proto; __u8 flowic_flags; #define FLOWI_FLAG_ANYSRC 0x01 #define FLOWI_FLAG_PRECOW_METRICS 0x02 #define FLOWI_FLAG_CAN_SLEEP 0x04 __u32 flowic_secid; }; union flowi_uli { struct { __be16 sport; __be16 dport; } ports; struct { __u8 type; __u8 code; } icmpt; struct { __le16 sport; __le16 dport; } dnports; __be32 spi; __be32 gre_key; struct { __u8 type; } mht; }; struct flowi4 { struct flowi_common __fl_common; #define flowi4_oif __fl_common.flowic_oif #define flowi4_iif __fl_common.flowic_iif #define flowi4_mark __fl_common.flowic_mark #define flowi4_tos __fl_common.flowic_tos #define flowi4_scope __fl_common.flowic_scope #define flowi4_proto __fl_common.flowic_proto #define flowi4_flags __fl_common.flowic_flags #define flowi4_secid __fl_common.flowic_secid __be32 daddr; __be32 saddr; union flowi_uli uli; #define fl4_sport uli.ports.sport #define fl4_dport uli.ports.dport #define fl4_icmp_type uli.icmpt.type #define fl4_icmp_code uli.icmpt.code #define fl4_ipsec_spi uli.spi #define fl4_mh_type uli.mht.type #define fl4_gre_key uli.gre_key }; struct flowi6 { struct flowi_common __fl_common; #define flowi6_oif __fl_common.flowic_oif #define flowi6_iif __fl_common.flowic_iif #define flowi6_mark __fl_common.flowic_mark #define flowi6_tos __fl_common.flowic_tos #define flowi6_scope __fl_common.flowic_scope #define flowi6_proto __fl_common.flowic_proto #define flowi6_flags __fl_common.flowic_flags #define flowi6_secid __fl_common.flowic_secid struct in6_addr daddr; struct in6_addr saddr; __be32 flowlabel; union flowi_uli uli; #define fl6_sport uli.ports.sport #define fl6_dport uli.ports.dport #define fl6_icmp_type uli.icmpt.type #define fl6_icmp_code uli.icmpt.code #define fl6_ipsec_spi uli.spi #define fl6_mh_type uli.mht.type #define fl6_gre_key uli.gre_key }; struct flowidn { struct flowi_common __fl_common; __le16 daddr; __le16 saddr; union flowi_uli uli; }; struct flowi { union { struct flowi_common __fl_common; struct flowi4 ip4; struct flowi6 ip6; struct flowidn dn; } u; #define flowi_oif u.__fl_common.flowic_oif #define flowi_iif u.__fl_common.flowic_iif #define flowi_mark u.__fl_common.flowic_mark #define flowi_tos u.__fl_common.flowic_tos #define flowi_scope u.__fl_common.flowic_scope #define flowi_proto u.__fl_common.flowic_proto #define flowi_flags u.__fl_common.flowic_flags #define flowi_secid u.__fl_common.flowic_secid #define fld_scope flowi_scope #define fld_dst u.dn.daddr #define fld_src u.dn.saddr } __attribute__((__aligned__(BITS_PER_LONG/8))); static inline struct flowi *flowi4_to_flowi(struct flowi4 *fl4) { return container_of(fl4, struct flowi, u.ip4); } static inline struct flowi *flowi6_to_flowi(struct flowi6 *fl6) { return container_of(fl6, struct flowi, u.ip6); } static inline struct flowi *flowidn_to_flowi(struct flowidn *fldn) { return container_of(fldn, struct flowi, u.dn); } #define FLOW_DIR_IN 0 #define FLOW_DIR_OUT 1 #define FLOW_DIR_FWD 2 struct net; struct sock; struct flow_cache_ops; struct flow_cache_object { const struct flow_cache_ops *ops; }; struct flow_cache_ops { struct flow_cache_object *(*get)(struct flow_cache_object *); int (*check)(struct flow_cache_object *); void (*delete)(struct flow_cache_object *); }; typedef struct flow_cache_object *(*flow_resolve_t)( struct net *net, const struct flowi *key, u16 family, u8 dir, struct flow_cache_object *oldobj, void *ctx); extern struct flow_cache_object *flow_cache_lookup( struct net *net, const struct flowi *key, u16 family, u8 dir, flow_resolve_t resolver, void *ctx); extern void flow_cache_flush(void); extern atomic_t flow_cache_genid; #endif