| 1 | |
| 2 | *
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| 3 | * Generic internet FLOW.
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| 4 | *
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| 5 |
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| 6 |
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| 7 | #ifndef _NET_FLOW_H
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| 8 | #define _NET_FLOW_H
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| 9 |
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| 10 | #include <linux/in6.h>
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| 11 | #include <asm/atomic.h>
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| 12 |
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| 13 | struct flowi {
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| 14 | int oif;
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| 15 | int iif;
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| 16 | __u32 mark;
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| 17 |
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| 18 | union {
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| 19 | struct {
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| 20 | __be32 daddr;
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| 21 | __be32 saddr;
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| 22 | __u8 tos;
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| 23 | __u8 scope;
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| 24 | } ip4_u;
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| 25 |
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| 26 | struct {
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| 27 | struct in6_addr daddr;
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| 28 | struct in6_addr saddr;
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| 29 | __be32 flowlabel;
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| 30 | } ip6_u;
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| 31 |
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| 32 | struct {
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| 33 | __le16 daddr;
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| 34 | __le16 saddr;
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| 35 | __u8 scope;
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| 36 | } dn_u;
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| 37 | } nl_u;
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| 38 | #define fld_dst nl_u.dn_u.daddr
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| 39 | #define fld_src nl_u.dn_u.saddr
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| 40 | #define fld_scope nl_u.dn_u.scope
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| 41 | #define fl6_dst nl_u.ip6_u.daddr
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| 42 | #define fl6_src nl_u.ip6_u.saddr
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| 43 | #define fl6_flowlabel nl_u.ip6_u.flowlabel
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| 44 | #define fl4_dst nl_u.ip4_u.daddr
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| 45 | #define fl4_src nl_u.ip4_u.saddr
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| 46 | #define fl4_tos nl_u.ip4_u.tos
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| 47 | #define fl4_scope nl_u.ip4_u.scope
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| 48 |
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| 49 | __u8 proto;
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| 50 | __u8 flags;
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| 51 | #define FLOWI_FLAG_MULTIPATHOLDROUTE 0x01
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| 52 | union {
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| 53 | struct {
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| 54 | __be16 sport;
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| 55 | __be16 dport;
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| 56 | } ports;
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| 57 |
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| 58 | struct {
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| 59 | __u8 type;
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| 60 | __u8 code;
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| 61 | } icmpt;
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| 62 |
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| 63 | struct {
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| 64 | __le16 sport;
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| 65 | __le16 dport;
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| 66 | } dnports;
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| 67 |
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| 68 | __be32 spi;
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| 69 |
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| 70 | #ifdef CONFIG_IPV6_MIP6
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| 71 | struct {
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| 72 | __u8 type;
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| 73 | } mht;
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| 74 | #endif
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| 75 | } uli_u;
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| 76 | #define fl_ip_sport uli_u.ports.sport
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| 77 | #define fl_ip_dport uli_u.ports.dport
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| 78 | #define fl_icmp_type uli_u.icmpt.type
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| 79 | #define fl_icmp_code uli_u.icmpt.code
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| 80 | #define fl_ipsec_spi uli_u.spi
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| 81 | #ifdef CONFIG_IPV6_MIP6
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| 82 | #define fl_mh_type uli_u.mht.type
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| 83 | #endif
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| 84 | __u32 secid;
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| 85 | } __attribute__((__aligned__(BITS_PER_LONG/8)));
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| 86 |
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| 87 | #define FLOW_DIR_IN 0
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| 88 | #define FLOW_DIR_OUT 1
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| 89 | #define FLOW_DIR_FWD 2
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| 90 |
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| 91 | struct sock;
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| 92 | typedef int (*flow_resolve_t)(struct flowi *key, u16 family, u8 dir,
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| 93 | void **objp, atomic_t **obj_refp);
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| 94 |
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| 95 | extern void *flow_cache_lookup(struct flowi *key, u16 family, u8 dir,
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| 96 | flow_resolve_t resolver);
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| 97 | extern void flow_cache_flush(void);
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| 98 | extern atomic_t flow_cache_genid;
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| 99 |
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| 100 | #endif
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