[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_common {
	int	flowic_oif;
	int	flowic_iif;
	__u32	flowic_mark;
	__u8	flowic_tos;
	__u8	flowic_scope;
	__u8	flowic_proto;
	__u8	flowic_flags;
#define FLOWI_FLAG_ANYSRC		0x01
#define FLOWI_FLAG_PRECOW_METRICS	0x02
#define FLOWI_FLAG_CAN_SLEEP		0x04
	__u32	flowic_secid;
};

union flowi_uli {
	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;
};

struct flowi {
	struct flowi_common	__fl_common;
#define flowi_oif		__fl_common.flowic_oif
#define flowi_iif		__fl_common.flowic_iif
#define flowi_mark		__fl_common.flowic_mark
#define flowi_tos		__fl_common.flowic_tos
#define flowi_scope		__fl_common.flowic_scope
#define flowi_proto		__fl_common.flowic_proto
#define flowi_flags		__fl_common.flowic_flags
#define flowi_secid		__fl_common.flowic_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 flowi_uli uli_u;
#define fl4_sport	uli_u.ports.sport
#define fl4_dport	uli_u.ports.dport
#define fl4_icmp_type	uli_u.icmpt.type
#define fl4_icmp_code	uli_u.icmpt.code
#define fl4_ipsec_spi	uli_u.spi
#define fl4_mh_type	uli_u.mht.type
#define fl4_gre_key	uli_u.gre_key
#define fl6_sport	uli_u.ports.sport
#define fl6_dport	uli_u.ports.dport
#define fl6_icmp_type	uli_u.icmpt.type
#define fl6_icmp_code	uli_u.icmpt.code
#define fl6_ipsec_spi	uli_u.spi
#define fl6_mh_type	uli_u.mht.type
#define fl6_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
806566cc DM	13	struct 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;
fbef0a40 DM	21	#define FLOWI_FLAG_ANYSRC 0x01
	22	#define FLOWI_FLAG_PRECOW_METRICS 0x02
	23	#define FLOWI_FLAG_CAN_SLEEP 0x04
806566cc DM	24	__u32 flowic_secid;
	25	};
	26
08704bcb DM	27	union flowi_uli {
	28	struct {
	29	__be16 sport;
	30	__be16 dport;
	31	} ports;
	32
	33	struct {
	34	__u8 type;
	35	__u8 code;
	36	} icmpt;
	37
	38	struct {
	39	__le16 sport;
	40	__le16 dport;
	41	} dnports;
	42
	43	__be32 spi;
	44	__be32 gre_key;
	45
	46	struct {
	47	__u8 type;
	48	} mht;
	49	};
	50
806566cc DM	51	struct flowi {
	52	struct flowi_common __fl_common;
	53	#define flowi_oif __fl_common.flowic_oif
	54	#define flowi_iif __fl_common.flowic_iif
	55	#define flowi_mark __fl_common.flowic_mark
	56	#define flowi_tos __fl_common.flowic_tos
	57	#define flowi_scope __fl_common.flowic_scope
	58	#define flowi_proto __fl_common.flowic_proto
	59	#define flowi_flags __fl_common.flowic_flags
	60	#define flowi_secid __fl_common.flowic_secid
1da177e4 LT	61
	62	union {
	63	struct {
f2c3fe24 AV	64	__be32 daddr;
f2c3fe24 AV	65	__be32 saddr;
1da177e4 LT	66	} ip4_u;
	67
	68	struct {
	69	struct in6_addr daddr;
	70	struct in6_addr saddr;
90bcaf7b	71	__be32 flowlabel;
1da177e4 LT	72	} ip6_u;
	73
	74	struct {
c4ea94ab SW	75	__le16 daddr;
c4ea94ab SW	76	__le16 saddr;
1da177e4 LT	77	__u8 scope;
	78	} dn_u;
	79	} nl_u;
	80	#define fld_dst nl_u.dn_u.daddr
	81	#define fld_src nl_u.dn_u.saddr
1da177e4 LT	82	#define fld_scope nl_u.dn_u.scope
	83	#define fl6_dst nl_u.ip6_u.daddr
	84	#define fl6_src nl_u.ip6_u.saddr
	85	#define fl6_flowlabel nl_u.ip6_u.flowlabel
	86	#define fl4_dst nl_u.ip4_u.daddr
	87	#define fl4_src nl_u.ip4_u.saddr
1d28f42c DM	88	#define fl4_tos flowi_tos
1d28f42c DM	89	#define fl4_scope flowi_scope
1da177e4	90
08704bcb	91	union flowi_uli uli_u;
6281dcc9 DM	92	#define fl4_sport uli_u.ports.sport
	93	#define fl4_dport uli_u.ports.dport
	94	#define fl4_icmp_type uli_u.icmpt.type
	95	#define fl4_icmp_code uli_u.icmpt.code
	96	#define fl4_ipsec_spi uli_u.spi
	97	#define fl4_mh_type uli_u.mht.type
	98	#define fl4_gre_key uli_u.gre_key
	99	#define fl6_sport uli_u.ports.sport
	100	#define fl6_dport uli_u.ports.dport
	101	#define fl6_icmp_type uli_u.icmpt.type
	102	#define fl6_icmp_code uli_u.icmpt.code
	103	#define fl6_ipsec_spi uli_u.spi
	104	#define fl6_mh_type uli_u.mht.type
	105	#define fl6_gre_key uli_u.gre_key
1da177e4 LT	106	} __attribute__((__aligned__(BITS_PER_LONG/8)));
	107
	108	#define FLOW_DIR_IN 0
	109	#define FLOW_DIR_OUT 1
	110	#define FLOW_DIR_FWD 2
	111
52479b62	112	struct net;
df71837d	113	struct sock;
fe1a5f03 TT	114	struct flow_cache_ops;
	115
	116	struct flow_cache_object {
	117	const struct flow_cache_ops *ops;
	118	};
	119
	120	struct flow_cache_ops {
	121	struct flow_cache_object (get)(struct flow_cache_object *);
	122	int (check)(struct flow_cache_object );
	123	void (delete)(struct flow_cache_object );
	124	};
	125
	126	typedef struct flow_cache_object (flow_resolve_t)(
dee9f4bc	127	struct net net, const struct flowi key, u16 family,
fe1a5f03 TT	128	u8 dir, struct flow_cache_object oldobj, void ctx);
	129
	130	extern struct flow_cache_object *flow_cache_lookup(
dee9f4bc	131	struct net net, const struct flowi key, u16 family,
fe1a5f03	132	u8 dir, flow_resolve_t resolver, void *ctx);
1da177e4	133
1da177e4 LT	134	extern void flow_cache_flush(void);
	135	extern atomic_t flow_cache_genid;
	136
0730b9a1 DM	137	static inline int flow_cache_uli_match(const struct flowi *fl1,
0730b9a1 DM	138	const struct flowi *fl2)
157bfc25	139	{
1d28f42c	140	return (fl1->flowi_proto == fl2->flowi_proto &&
157bfc25 MN	141	!memcmp(&fl1->uli_u, &fl2->uli_u, sizeof(fl1->uli_u)));
	142	}
	143
1da177e4	144	#endif