flow.h revision 728871bc05afc8ff310b17dba3e57a2472792b13
1/* 2 * 3 * Generic internet FLOW. 4 * 5 */ 6 7#ifndef _NET_FLOW_H 8#define _NET_FLOW_H 9 10#include <linux/in6.h> 11#include <linux/atomic.h> 12 13struct flowi_common { 14 int flowic_oif; 15 int flowic_iif; 16 __u32 flowic_mark; 17 __u8 flowic_tos; 18 __u8 flowic_scope; 19 __u8 flowic_proto; 20 __u8 flowic_flags; 21#define FLOWI_FLAG_ANYSRC 0x01 22#define FLOWI_FLAG_PRECOW_METRICS 0x02 23#define FLOWI_FLAG_CAN_SLEEP 0x04 24 __u32 flowic_secid; 25}; 26 27union flowi_uli { 28 struct { 29 __be16 dport; 30 __be16 sport; 31 } ports; 32 33 struct { 34 __u8 type; 35 __u8 code; 36 } icmpt; 37 38 struct { 39 __le16 dport; 40 __le16 sport; 41 } dnports; 42 43 __be32 spi; 44 __be32 gre_key; 45 46 struct { 47 __u8 type; 48 } mht; 49}; 50 51struct flowi4 { 52 struct flowi_common __fl_common; 53#define flowi4_oif __fl_common.flowic_oif 54#define flowi4_iif __fl_common.flowic_iif 55#define flowi4_mark __fl_common.flowic_mark 56#define flowi4_tos __fl_common.flowic_tos 57#define flowi4_scope __fl_common.flowic_scope 58#define flowi4_proto __fl_common.flowic_proto 59#define flowi4_flags __fl_common.flowic_flags 60#define flowi4_secid __fl_common.flowic_secid 61 __be32 daddr; 62 __be32 saddr; 63 union flowi_uli uli; 64#define fl4_sport uli.ports.sport 65#define fl4_dport uli.ports.dport 66#define fl4_icmp_type uli.icmpt.type 67#define fl4_icmp_code uli.icmpt.code 68#define fl4_ipsec_spi uli.spi 69#define fl4_mh_type uli.mht.type 70#define fl4_gre_key uli.gre_key 71} __attribute__((__aligned__(BITS_PER_LONG/8))); 72 73static inline void flowi4_init_output(struct flowi4 *fl4, int oif, 74 __u32 mark, __u8 tos, __u8 scope, 75 __u8 proto, __u8 flags, 76 __be32 daddr, __be32 saddr, 77 __be16 dport, __be32 sport) 78{ 79 fl4->flowi4_oif = oif; 80 fl4->flowi4_iif = 0; 81 fl4->flowi4_mark = mark; 82 fl4->flowi4_tos = tos; 83 fl4->flowi4_scope = scope; 84 fl4->flowi4_proto = proto; 85 fl4->flowi4_flags = flags; 86 fl4->flowi4_secid = 0; 87 fl4->daddr = daddr; 88 fl4->saddr = saddr; 89 fl4->fl4_dport = dport; 90 fl4->fl4_sport = sport; 91} 92 93 94struct flowi6 { 95 struct flowi_common __fl_common; 96#define flowi6_oif __fl_common.flowic_oif 97#define flowi6_iif __fl_common.flowic_iif 98#define flowi6_mark __fl_common.flowic_mark 99#define flowi6_tos __fl_common.flowic_tos 100#define flowi6_scope __fl_common.flowic_scope 101#define flowi6_proto __fl_common.flowic_proto 102#define flowi6_flags __fl_common.flowic_flags 103#define flowi6_secid __fl_common.flowic_secid 104 struct in6_addr daddr; 105 struct in6_addr saddr; 106 __be32 flowlabel; 107 union flowi_uli uli; 108#define fl6_sport uli.ports.sport 109#define fl6_dport uli.ports.dport 110#define fl6_icmp_type uli.icmpt.type 111#define fl6_icmp_code uli.icmpt.code 112#define fl6_ipsec_spi uli.spi 113#define fl6_mh_type uli.mht.type 114#define fl6_gre_key uli.gre_key 115} __attribute__((__aligned__(BITS_PER_LONG/8))); 116 117struct flowidn { 118 struct flowi_common __fl_common; 119#define flowidn_oif __fl_common.flowic_oif 120#define flowidn_iif __fl_common.flowic_iif 121#define flowidn_mark __fl_common.flowic_mark 122#define flowidn_scope __fl_common.flowic_scope 123#define flowidn_proto __fl_common.flowic_proto 124#define flowidn_flags __fl_common.flowic_flags 125 __le16 daddr; 126 __le16 saddr; 127 union flowi_uli uli; 128#define fld_sport uli.ports.sport 129#define fld_dport uli.ports.dport 130} __attribute__((__aligned__(BITS_PER_LONG/8))); 131 132struct flowi { 133 union { 134 struct flowi_common __fl_common; 135 struct flowi4 ip4; 136 struct flowi6 ip6; 137 struct flowidn dn; 138 } u; 139#define flowi_oif u.__fl_common.flowic_oif 140#define flowi_iif u.__fl_common.flowic_iif 141#define flowi_mark u.__fl_common.flowic_mark 142#define flowi_tos u.__fl_common.flowic_tos 143#define flowi_scope u.__fl_common.flowic_scope 144#define flowi_proto u.__fl_common.flowic_proto 145#define flowi_flags u.__fl_common.flowic_flags 146#define flowi_secid u.__fl_common.flowic_secid 147} __attribute__((__aligned__(BITS_PER_LONG/8))); 148 149static inline struct flowi *flowi4_to_flowi(struct flowi4 *fl4) 150{ 151 return container_of(fl4, struct flowi, u.ip4); 152} 153 154static inline struct flowi *flowi6_to_flowi(struct flowi6 *fl6) 155{ 156 return container_of(fl6, struct flowi, u.ip6); 157} 158 159static inline struct flowi *flowidn_to_flowi(struct flowidn *fldn) 160{ 161 return container_of(fldn, struct flowi, u.dn); 162} 163 164#define FLOW_DIR_IN 0 165#define FLOW_DIR_OUT 1 166#define FLOW_DIR_FWD 2 167 168struct net; 169struct sock; 170struct flow_cache_ops; 171 172struct flow_cache_object { 173 const struct flow_cache_ops *ops; 174}; 175 176struct flow_cache_ops { 177 struct flow_cache_object *(*get)(struct flow_cache_object *); 178 int (*check)(struct flow_cache_object *); 179 void (*delete)(struct flow_cache_object *); 180}; 181 182typedef struct flow_cache_object *(*flow_resolve_t)( 183 struct net *net, const struct flowi *key, u16 family, 184 u8 dir, struct flow_cache_object *oldobj, void *ctx); 185 186extern struct flow_cache_object *flow_cache_lookup( 187 struct net *net, const struct flowi *key, u16 family, 188 u8 dir, flow_resolve_t resolver, void *ctx); 189 190extern void flow_cache_flush(void); 191extern atomic_t flow_cache_genid; 192 193#endif 194