122 lines
2.4 KiB
C
122 lines
2.4 KiB
C
/*
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*
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* Generic internet FLOW.
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*
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*/
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#ifndef _NET_FLOW_H
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#define _NET_FLOW_H
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#include <linux/in6.h>
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#include <asm/atomic.h>
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struct flowi {
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int oif;
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int iif;
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__u32 mark;
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union {
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struct {
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__be32 daddr;
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__be32 saddr;
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__u8 tos;
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__u8 scope;
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} ip4_u;
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struct {
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struct in6_addr daddr;
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struct in6_addr saddr;
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__be32 flowlabel;
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} ip6_u;
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struct {
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__le16 daddr;
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__le16 saddr;
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__u8 scope;
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} dn_u;
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} nl_u;
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#define fld_dst nl_u.dn_u.daddr
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#define fld_src nl_u.dn_u.saddr
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#define fld_scope nl_u.dn_u.scope
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#define fl6_dst nl_u.ip6_u.daddr
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#define fl6_src nl_u.ip6_u.saddr
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#define fl6_flowlabel nl_u.ip6_u.flowlabel
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#define fl4_dst nl_u.ip4_u.daddr
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#define fl4_src nl_u.ip4_u.saddr
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#define fl4_tos nl_u.ip4_u.tos
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#define fl4_scope nl_u.ip4_u.scope
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__u8 proto;
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__u8 flags;
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#define FLOWI_FLAG_ANYSRC 0x01
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#define FLOWI_FLAG_PRECOW_METRICS 0x02
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union {
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struct {
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__be16 sport;
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__be16 dport;
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} ports;
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struct {
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__u8 type;
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__u8 code;
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} icmpt;
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struct {
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__le16 sport;
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__le16 dport;
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} dnports;
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__be32 spi;
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__be32 gre_key;
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struct {
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__u8 type;
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} mht;
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} uli_u;
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#define fl_ip_sport uli_u.ports.sport
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#define fl_ip_dport uli_u.ports.dport
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#define fl_icmp_type uli_u.icmpt.type
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#define fl_icmp_code uli_u.icmpt.code
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#define fl_ipsec_spi uli_u.spi
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#define fl_mh_type uli_u.mht.type
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#define fl_gre_key uli_u.gre_key
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__u32 secid; /* used by xfrm; see secid.txt */
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} __attribute__((__aligned__(BITS_PER_LONG/8)));
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#define FLOW_DIR_IN 0
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#define FLOW_DIR_OUT 1
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#define FLOW_DIR_FWD 2
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struct net;
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struct sock;
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struct flow_cache_ops;
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struct flow_cache_object {
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const struct flow_cache_ops *ops;
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};
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struct flow_cache_ops {
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struct flow_cache_object *(*get)(struct flow_cache_object *);
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int (*check)(struct flow_cache_object *);
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void (*delete)(struct flow_cache_object *);
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};
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typedef struct flow_cache_object *(*flow_resolve_t)(
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struct net *net, const struct flowi *key, u16 family,
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u8 dir, struct flow_cache_object *oldobj, void *ctx);
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extern struct flow_cache_object *flow_cache_lookup(
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struct net *net, const struct flowi *key, u16 family,
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u8 dir, flow_resolve_t resolver, void *ctx);
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extern void flow_cache_flush(void);
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extern atomic_t flow_cache_genid;
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static inline int flow_cache_uli_match(const struct flowi *fl1,
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const struct flowi *fl2)
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{
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return (fl1->proto == fl2->proto &&
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!memcmp(&fl1->uli_u, &fl2->uli_u, sizeof(fl1->uli_u)));
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}
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#endif
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