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; |
Thomas Graf | 47dcf0c | 2006-11-09 15:20:38 -0800 | [diff] [blame] | 16 | __u32 mark; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | |
| 18 | union { |
| 19 | struct { |
Al Viro | f2c3fe2 | 2006-09-26 21:26:42 -0700 | [diff] [blame] | 20 | __be32 daddr; |
| 21 | __be32 saddr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | __u8 tos; |
| 23 | __u8 scope; |
| 24 | } ip4_u; |
| 25 | |
| 26 | struct { |
| 27 | struct in6_addr daddr; |
| 28 | struct in6_addr saddr; |
Al Viro | 90bcaf7 | 2006-11-08 00:25:17 -0800 | [diff] [blame] | 29 | __be32 flowlabel; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | } ip6_u; |
| 31 | |
| 32 | struct { |
Steven Whitehouse | c4ea94a | 2006-03-20 22:42:39 -0800 | [diff] [blame] | 33 | __le16 daddr; |
| 34 | __le16 saddr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | __u8 scope; |
| 36 | } dn_u; |
| 37 | } nl_u; |
| 38 | #define fld_dst nl_u.dn_u.daddr |
| 39 | #define fld_src nl_u.dn_u.saddr |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | #define fld_scope nl_u.dn_u.scope |
| 41 | #define fl6_dst nl_u.ip6_u.daddr |
| 42 | #define fl6_src nl_u.ip6_u.saddr |
| 43 | #define fl6_flowlabel nl_u.ip6_u.flowlabel |
| 44 | #define fl4_dst nl_u.ip4_u.daddr |
| 45 | #define fl4_src nl_u.ip4_u.saddr |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | #define fl4_tos nl_u.ip4_u.tos |
| 47 | #define fl4_scope nl_u.ip4_u.scope |
| 48 | |
| 49 | __u8 proto; |
| 50 | __u8 flags; |
| 51 | #define FLOWI_FLAG_MULTIPATHOLDROUTE 0x01 |
| 52 | union { |
| 53 | struct { |
Al Viro | cc939d3 | 2006-09-27 18:33:22 -0700 | [diff] [blame] | 54 | __be16 sport; |
| 55 | __be16 dport; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 56 | } ports; |
| 57 | |
| 58 | struct { |
| 59 | __u8 type; |
| 60 | __u8 code; |
| 61 | } icmpt; |
| 62 | |
| 63 | struct { |
Steven Whitehouse | c4ea94a | 2006-03-20 22:42:39 -0800 | [diff] [blame] | 64 | __le16 sport; |
| 65 | __le16 dport; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | } dnports; |
| 67 | |
Al Viro | 4324a17 | 2006-09-27 18:49:07 -0700 | [diff] [blame] | 68 | __be32 spi; |
Masahide NAKAMURA | 2b74165 | 2006-08-23 20:34:26 -0700 | [diff] [blame] | 69 | |
| 70 | #ifdef CONFIG_IPV6_MIP6 |
| 71 | struct { |
| 72 | __u8 type; |
| 73 | } mht; |
| 74 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 |
Masahide NAKAMURA | 2b74165 | 2006-08-23 20:34:26 -0700 | [diff] [blame] | 81 | #ifdef CONFIG_IPV6_MIP6 |
| 82 | #define fl_mh_type uli_u.mht.type |
| 83 | #endif |
Venkat Yekkirala | b6340fc | 2006-07-24 23:28:37 -0700 | [diff] [blame] | 84 | __u32 secid; /* used by xfrm; see secid.txt */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 85 | } __attribute__((__aligned__(BITS_PER_LONG/8))); |
| 86 | |
| 87 | #define FLOW_DIR_IN 0 |
| 88 | #define FLOW_DIR_OUT 1 |
| 89 | #define FLOW_DIR_FWD 2 |
| 90 | |
Trent Jaeger | df71837 | 2005-12-13 23:12:27 -0800 | [diff] [blame] | 91 | struct sock; |
James Morris | 134b0fc | 2006-10-05 15:42:27 -0500 | [diff] [blame] | 92 | typedef int (*flow_resolve_t)(struct flowi *key, u16 family, u8 dir, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 93 | void **objp, atomic_t **obj_refp); |
| 94 | |
Venkat Yekkirala | e0d1caa | 2006-07-24 23:29:07 -0700 | [diff] [blame] | 95 | extern void *flow_cache_lookup(struct flowi *key, u16 family, u8 dir, |
Trent Jaeger | df71837 | 2005-12-13 23:12:27 -0800 | [diff] [blame] | 96 | flow_resolve_t resolver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 97 | extern void flow_cache_flush(void); |
| 98 | extern atomic_t flow_cache_genid; |
| 99 | |
| 100 | #endif |