[deliverable/linux.git] / include / net / flow.h

/*
 *
 *	Generic internet FLOW.
 *
 */

#ifndef _NET_FLOW_H
#define _NET_FLOW_H

#include <linux/in6.h>
#include <asm/atomic.h>

struct flowi {
	int	flowi_oif;
	int	flowi_iif;
	__u32	flowi_mark;
	__u8	flowi_tos;
	__u8	flowi_scope;
	__u8	flowi_proto;
	__u8	flowi_flags;
#define FLOWI_FLAG_ANYSRC		0x01
#define FLOWI_FLAG_PRECOW_METRICS	0x02
#define FLOWI_FLAG_CAN_SLEEP		0x04
	__u32	flowi_secid;

	union {
		struct {
			__be32			daddr;
			__be32			saddr;
		} ip4_u;
		
		struct {
			struct in6_addr		daddr;
			struct in6_addr		saddr;
			__be32			flowlabel;
		} ip6_u;

		struct {
			__le16			daddr;
			__le16			saddr;
			__u8			scope;
		} dn_u;
	} nl_u;
#define fld_dst		nl_u.dn_u.daddr
#define fld_src		nl_u.dn_u.saddr
#define fld_scope	nl_u.dn_u.scope
#define fl6_dst		nl_u.ip6_u.daddr
#define fl6_src		nl_u.ip6_u.saddr
#define fl6_flowlabel	nl_u.ip6_u.flowlabel
#define fl4_dst		nl_u.ip4_u.daddr
#define fl4_src		nl_u.ip4_u.saddr
#define fl4_tos		flowi_tos
#define fl4_scope	flowi_scope

	union {
		struct {
			__be16	sport;
			__be16	dport;
		} ports;

		struct {
			__u8	type;
			__u8	code;
		} icmpt;

		struct {
			__le16	sport;
			__le16	dport;
		} dnports;

		__be32		spi;
		__be32		gre_key;

		struct {
			__u8	type;
		} mht;
	} uli_u;
#define fl_ip_sport	uli_u.ports.sport
#define fl_ip_dport	uli_u.ports.dport
#define fl_icmp_type	uli_u.icmpt.type
#define fl_icmp_code	uli_u.icmpt.code
#define fl_ipsec_spi	uli_u.spi
#define fl_mh_type	uli_u.mht.type
#define fl_gre_key	uli_u.gre_key
} __attribute__((__aligned__(BITS_PER_LONG/8)));

#define FLOW_DIR_IN	0
#define FLOW_DIR_OUT	1
#define FLOW_DIR_FWD	2

struct net;
struct sock;
struct flow_cache_ops;

struct flow_cache_object {
	const struct flow_cache_ops *ops;
};

struct flow_cache_ops {
	struct flow_cache_object *(*get)(struct flow_cache_object *);
	int (*check)(struct flow_cache_object *);
	void (*delete)(struct flow_cache_object *);
};

typedef struct flow_cache_object *(*flow_resolve_t)(
		struct net *net, const struct flowi *key, u16 family,
		u8 dir, struct flow_cache_object *oldobj, void *ctx);

extern struct flow_cache_object *flow_cache_lookup(
		struct net *net, const struct flowi *key, u16 family,
		u8 dir, flow_resolve_t resolver, void *ctx);

extern void flow_cache_flush(void);
extern atomic_t flow_cache_genid;

static inline int flow_cache_uli_match(const struct flowi *fl1,
				       const struct flowi *fl2)
{
	return (fl1->flowi_proto == fl2->flowi_proto &&
		!memcmp(&fl1->uli_u, &fl2->uli_u, sizeof(fl1->uli_u)));
}

#endif
Commit	Line	Data
1da177e4 LT	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 {
1d28f42c DM	14	int flowi_oif;
	15	int flowi_iif;
	16	__u32 flowi_mark;
	17	__u8 flowi_tos;
	18	__u8 flowi_scope;
	19	__u8 flowi_proto;
	20	__u8 flowi_flags;
fbef0a40 DM	21	#define FLOWI_FLAG_ANYSRC 0x01
	22	#define FLOWI_FLAG_PRECOW_METRICS 0x02
	23	#define FLOWI_FLAG_CAN_SLEEP 0x04
1d28f42c	24	__u32 flowi_secid;
1da177e4 LT	25
	26	union {
	27	struct {
f2c3fe24 AV	28	__be32 daddr;
f2c3fe24 AV	29	__be32 saddr;
1da177e4 LT	30	} ip4_u;
	31
	32	struct {
	33	struct in6_addr daddr;
	34	struct in6_addr saddr;
90bcaf7b	35	__be32 flowlabel;
1da177e4 LT	36	} ip6_u;
	37
	38	struct {
c4ea94ab SW	39	__le16 daddr;
c4ea94ab SW	40	__le16 saddr;
1da177e4 LT	41	__u8 scope;
	42	} dn_u;
	43	} nl_u;
	44	#define fld_dst nl_u.dn_u.daddr
	45	#define fld_src nl_u.dn_u.saddr
1da177e4 LT	46	#define fld_scope nl_u.dn_u.scope
	47	#define fl6_dst nl_u.ip6_u.daddr
	48	#define fl6_src nl_u.ip6_u.saddr
	49	#define fl6_flowlabel nl_u.ip6_u.flowlabel
	50	#define fl4_dst nl_u.ip4_u.daddr
	51	#define fl4_src nl_u.ip4_u.saddr
1d28f42c DM	52	#define fl4_tos flowi_tos
1d28f42c DM	53	#define fl4_scope flowi_scope
1da177e4	54
1da177e4 LT	55	union {
1da177e4 LT	56	struct {
cc939d37 AV	57	__be16 sport;
cc939d37 AV	58	__be16 dport;
1da177e4 LT	59	} ports;
	60
	61	struct {
	62	__u8 type;
	63	__u8 code;
	64	} icmpt;
	65
	66	struct {
c4ea94ab SW	67	__le16 sport;
c4ea94ab SW	68	__le16 dport;
1da177e4 LT	69	} dnports;
1da177e4 LT	70
4324a174	71	__be32 spi;
cc9ff19d	72	__be32 gre_key;
2b741653	73
2b741653 MN	74	struct {
	75	__u8 type;
	76	} mht;
1da177e4 LT	77	} uli_u;
	78	#define fl_ip_sport uli_u.ports.sport
	79	#define fl_ip_dport uli_u.ports.dport
	80	#define fl_icmp_type uli_u.icmpt.type
	81	#define fl_icmp_code uli_u.icmpt.code
	82	#define fl_ipsec_spi uli_u.spi
2b741653	83	#define fl_mh_type uli_u.mht.type
cc9ff19d	84	#define fl_gre_key uli_u.gre_key
1da177e4 LT	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
52479b62	91	struct net;
df71837d	92	struct sock;
fe1a5f03 TT	93	struct flow_cache_ops;
	94
	95	struct flow_cache_object {
	96	const struct flow_cache_ops *ops;
	97	};
	98
	99	struct flow_cache_ops {
	100	struct flow_cache_object (get)(struct flow_cache_object *);
	101	int (check)(struct flow_cache_object );
	102	void (delete)(struct flow_cache_object );
	103	};
	104
	105	typedef struct flow_cache_object (flow_resolve_t)(
dee9f4bc	106	struct net net, const struct flowi key, u16 family,
fe1a5f03 TT	107	u8 dir, struct flow_cache_object oldobj, void ctx);
	108
	109	extern struct flow_cache_object *flow_cache_lookup(
dee9f4bc	110	struct net net, const struct flowi key, u16 family,
fe1a5f03	111	u8 dir, flow_resolve_t resolver, void *ctx);
1da177e4	112
1da177e4 LT	113	extern void flow_cache_flush(void);
	114	extern atomic_t flow_cache_genid;
	115
0730b9a1 DM	116	static inline int flow_cache_uli_match(const struct flowi *fl1,
0730b9a1 DM	117	const struct flowi *fl2)
157bfc25	118	{
1d28f42c	119	return (fl1->flowi_proto == fl2->flowi_proto &&
157bfc25 MN	120	!memcmp(&fl1->uli_u, &fl2->uli_u, sizeof(fl1->uli_u)));
	121	}
	122
1da177e4	123	#endif