/* * * Generic internet FLOW. * */ #ifndef _NET_FLOW_H #define _NET_FLOW_H #include <linux/in6.h> #include <asm/atomic.h> struct flowi { int oif; int iif; __u32 mark; union { struct { __be32 daddr; __be32 saddr; __u8 tos; __u8 scope; } ip4_u; struct { struct in6_addr daddr; struct in6_addr saddr; __be32 flowlabel; } ip6_u; struct { __le16 daddr; __le16 saddr; __u8 scope; } dn_u; } nl_u; #define fld_dst nl_u.dn_u.daddr #define fld_src nl_u.dn_u.saddr #define fld_scope nl_u.dn_u.scope #define fl6_dst nl_u.ip6_u.daddr #define fl6_src nl_u.ip6_u.saddr #define fl6_flowlabel nl_u.ip6_u.flowlabel #define fl4_dst nl_u.ip4_u.daddr #define fl4_src nl_u.ip4_u.saddr #define fl4_tos nl_u.ip4_u.tos #define fl4_scope nl_u.ip4_u.scope __u8 proto; __u8 flags; #define FLOWI_FLAG_MULTIPATHOLDROUTE 0x01 union { struct { __be16 sport; __be16 dport; } ports; struct { __u8 type; __u8 code; } icmpt; struct { __le16 sport; __le16 dport; } dnports; __be32 spi; #ifdef CONFIG_IPV6_MIP6 struct { __u8 type; } mht; #endif } uli_u; #define fl_ip_sport uli_u.ports.sport #define fl_ip_dport uli_u.ports.dport #define fl_icmp_type uli_u.icmpt.type #define fl_icmp_code uli_u.icmpt.code #define fl_ipsec_spi uli_u.spi #ifdef CONFIG_IPV6_MIP6 #define fl_mh_type uli_u.mht.type #endif __u32 secid; /* used by xfrm; see secid.txt */ } __attribute__((__aligned__(BITS_PER_LONG/8))); #define FLOW_DIR_IN 0 #define FLOW_DIR_OUT 1 #define FLOW_DIR_FWD 2 struct sock; typedef int (*flow_resolve_t)(struct flowi *key, u16 family, u8 dir, void **objp, atomic_t **obj_refp); extern void *flow_cache_lookup(struct flowi *key, u16 family, u8 dir, flow_resolve_t resolver); extern void flow_cache_flush(void); extern atomic_t flow_cache_genid; #endif