| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 <asm/atomic.h> |
| 12 | |
| 13 | struct flowi { |
| 14 | int oif; |
| 15 | int iif; |
| 16 | |
| 17 | union { |
| 18 | struct { |
| 19 | __u32 daddr; |
| 20 | __u32 saddr; |
| 21 | __u32 fwmark; |
| 22 | __u8 tos; |
| 23 | __u8 scope; |
| 24 | } ip4_u; |
| 25 | |
| 26 | struct { |
| 27 | struct in6_addr daddr; |
| 28 | struct in6_addr saddr; |
| 29 | __u32 flowlabel; |
| 30 | } ip6_u; |
| 31 | |
| 32 | struct { |
| 33 | __u16 daddr; |
| 34 | __u16 saddr; |
| 35 | __u32 fwmark; |
| 36 | __u8 scope; |
| 37 | } dn_u; |
| 38 | } nl_u; |
| 39 | #define fld_dst nl_u.dn_u.daddr |
| 40 | #define fld_src nl_u.dn_u.saddr |
| 41 | #define fld_fwmark nl_u.dn_u.fwmark |
| 42 | #define fld_scope nl_u.dn_u.scope |
| 43 | #define fl6_dst nl_u.ip6_u.daddr |
| 44 | #define fl6_src nl_u.ip6_u.saddr |
| 45 | #define fl6_flowlabel nl_u.ip6_u.flowlabel |
| 46 | #define fl4_dst nl_u.ip4_u.daddr |
| 47 | #define fl4_src nl_u.ip4_u.saddr |
| 48 | #define fl4_fwmark nl_u.ip4_u.fwmark |
| 49 | #define fl4_tos nl_u.ip4_u.tos |
| 50 | #define fl4_scope nl_u.ip4_u.scope |
| 51 | |
| 52 | __u8 proto; |
| 53 | __u8 flags; |
| 54 | #define FLOWI_FLAG_MULTIPATHOLDROUTE 0x01 |
| 55 | union { |
| 56 | struct { |
| 57 | __u16 sport; |
| 58 | __u16 dport; |
| 59 | } ports; |
| 60 | |
| 61 | struct { |
| 62 | __u8 type; |
| 63 | __u8 code; |
| 64 | } icmpt; |
| 65 | |
| 66 | struct { |
| 67 | __u16 sport; |
| 68 | __u16 dport; |
| 69 | __u8 objnum; |
| 70 | __u8 objnamel; /* Not 16 bits since max val is 16 */ |
| 71 | __u8 objname[16]; /* Not zero terminated */ |
| 72 | } dnports; |
| 73 | |
| 74 | __u32 spi; |
| 75 | } uli_u; |
| 76 | #define fl_ip_sport uli_u.ports.sport |
| 77 | #define fl_ip_dport uli_u.ports.dport |
| 78 | #define fl_icmp_type uli_u.icmpt.type |
| 79 | #define fl_icmp_code uli_u.icmpt.code |
| 80 | #define fl_ipsec_spi uli_u.spi |
| 81 | } __attribute__((__aligned__(BITS_PER_LONG/8))); |
| 82 | |
| 83 | #define FLOW_DIR_IN 0 |
| 84 | #define FLOW_DIR_OUT 1 |
| 85 | #define FLOW_DIR_FWD 2 |
| 86 | |
| 87 | typedef void (*flow_resolve_t)(struct flowi *key, u16 family, u8 dir, |
| 88 | void **objp, atomic_t **obj_refp); |
| 89 | |
| 90 | extern void *flow_cache_lookup(struct flowi *key, u16 family, u8 dir, |
| 91 | flow_resolve_t resolver); |
| 92 | extern void flow_cache_flush(void); |
| 93 | extern atomic_t flow_cache_genid; |
| 94 | |
| 95 | #endif |