3 * Generic internet FLOW.
10 #include <linux/in6.h>
11 #include <asm/atomic.h>
21 #define FLOWI_FLAG_ANYSRC 0x01
22 #define FLOWI_FLAG_PRECOW_METRICS 0x02
23 #define FLOWI_FLAG_CAN_SLEEP 0x04
52 struct flowi_common __fl_common;
53 #define flowi_oif __fl_common.flowic_oif
54 #define flowi_iif __fl_common.flowic_iif
55 #define flowi_mark __fl_common.flowic_mark
56 #define flowi_tos __fl_common.flowic_tos
57 #define flowi_scope __fl_common.flowic_scope
58 #define flowi_proto __fl_common.flowic_proto
59 #define flowi_flags __fl_common.flowic_flags
60 #define flowi_secid __fl_common.flowic_secid
69 struct in6_addr daddr;
70 struct in6_addr saddr;
80 #define fld_dst nl_u.dn_u.daddr
81 #define fld_src nl_u.dn_u.saddr
82 #define fld_scope nl_u.dn_u.scope
83 #define fl6_dst nl_u.ip6_u.daddr
84 #define fl6_src nl_u.ip6_u.saddr
85 #define fl6_flowlabel nl_u.ip6_u.flowlabel
86 #define fl4_dst nl_u.ip4_u.daddr
87 #define fl4_src nl_u.ip4_u.saddr
88 #define fl4_tos flowi_tos
89 #define fl4_scope flowi_scope
91 union flowi_uli uli_u;
92 #define fl_ip_sport uli_u.ports.sport
93 #define fl_ip_dport uli_u.ports.dport
94 #define fl_icmp_type uli_u.icmpt.type
95 #define fl_icmp_code uli_u.icmpt.code
96 #define fl_ipsec_spi uli_u.spi
97 #define fl_mh_type uli_u.mht.type
98 #define fl_gre_key uli_u.gre_key
99 } __attribute__((__aligned__(BITS_PER_LONG/8)));
101 #define FLOW_DIR_IN 0
102 #define FLOW_DIR_OUT 1
103 #define FLOW_DIR_FWD 2
107 struct flow_cache_ops;
109 struct flow_cache_object {
110 const struct flow_cache_ops *ops;
113 struct flow_cache_ops {
114 struct flow_cache_object *(*get)(struct flow_cache_object *);
115 int (*check)(struct flow_cache_object *);
116 void (*delete)(struct flow_cache_object *);
119 typedef struct flow_cache_object *(*flow_resolve_t)(
120 struct net *net, const struct flowi *key, u16 family,
121 u8 dir, struct flow_cache_object *oldobj, void *ctx);
123 extern struct flow_cache_object *flow_cache_lookup(
124 struct net *net, const struct flowi *key, u16 family,
125 u8 dir, flow_resolve_t resolver, void *ctx);
127 extern void flow_cache_flush(void);
128 extern atomic_t flow_cache_genid;
130 static inline int flow_cache_uli_match(const struct flowi *fl1,
131 const struct flowi *fl2)
133 return (fl1->flowi_proto == fl2->flowi_proto &&
134 !memcmp(&fl1->uli_u, &fl2->uli_u, sizeof(fl1->uli_u)));