[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	oif;
	int	iif;
	__u32	mark;

	union {
		struct {
			__be32			daddr;
			__be32			saddr;
			__u8			tos;
			__u8			scope;
		} 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		nl_u.ip4_u.tos
#define fl4_scope	nl_u.ip4_u.scope

	__u8	proto;
	__u8	flags;
#define FLOWI_FLAG_MULTIPATHOLDROUTE 0x01
	union {
		struct {
			__be16	sport;
			__be16	dport;
		} ports;

		struct {
			__u8	type;
			__u8	code;
		} icmpt;

		struct {
			__le16	sport;
			__le16	dport;
		} dnports;

		__be32		spi;

		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
	__u32           secid;	/* used by xfrm; see secid.txt */
} __attribute__((__aligned__(BITS_PER_LONG/8)));

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

struct sock;
typedef int (*flow_resolve_t)(struct flowi *key, u16 family, u8 dir,
			       void **objp, atomic_t **obj_refp);

extern void *flow_cache_lookup(struct flowi *key, u16 family, u8 dir,
	 		       flow_resolve_t resolver);
extern void flow_cache_flush(void);
extern atomic_t flow_cache_genid;

static inline int flow_cache_uli_match(struct flowi *fl1, struct flowi *fl2)
{
	return (fl1->proto == fl2->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 {
	14	int oif;
	15	int iif;
47dcf0cb	16	__u32 mark;
1da177e4 LT	17
	18	union {
	19	struct {
f2c3fe24 AV	20	__be32 daddr;
f2c3fe24 AV	21	__be32 saddr;
1da177e4 LT	22	__u8 tos;
	23	__u8 scope;
	24	} ip4_u;
	25
	26	struct {
	27	struct in6_addr daddr;
	28	struct in6_addr saddr;
90bcaf7b	29	__be32 flowlabel;
1da177e4 LT	30	} ip6_u;
	31
	32	struct {
c4ea94ab SW	33	__le16 daddr;
c4ea94ab SW	34	__le16 saddr;
1da177e4 LT	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
1da177e4 LT	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
1da177e4 LT	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 {
cc939d37 AV	54	__be16 sport;
cc939d37 AV	55	__be16 dport;
1da177e4 LT	56	} ports;
	57
	58	struct {
	59	__u8 type;
	60	__u8 code;
	61	} icmpt;
	62
	63	struct {
c4ea94ab SW	64	__le16 sport;
c4ea94ab SW	65	__le16 dport;
1da177e4 LT	66	} dnports;
1da177e4 LT	67
4324a174	68	__be32 spi;
2b741653	69
2b741653 MN	70	struct {
	71	__u8 type;
	72	} mht;
1da177e4 LT	73	} uli_u;
	74	#define fl_ip_sport uli_u.ports.sport
	75	#define fl_ip_dport uli_u.ports.dport
	76	#define fl_icmp_type uli_u.icmpt.type
	77	#define fl_icmp_code uli_u.icmpt.code
	78	#define fl_ipsec_spi uli_u.spi
2b741653	79	#define fl_mh_type uli_u.mht.type
b6340fcd	80	__u32 secid; /* used by xfrm; see secid.txt */
1da177e4 LT	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
df71837d	87	struct sock;
134b0fc5	88	typedef int (flow_resolve_t)(struct flowi key, u16 family, u8 dir,
1da177e4 LT	89	void objp, atomic_t obj_refp);
1da177e4 LT	90
e0d1caa7	91	extern void flow_cache_lookup(struct flowi key, u16 family, u8 dir,
df71837d	92	flow_resolve_t resolver);
1da177e4 LT	93	extern void flow_cache_flush(void);
	94	extern atomic_t flow_cache_genid;
	95
157bfc25 MN	96	static inline int flow_cache_uli_match(struct flowi fl1, struct flowi fl2)
	97	{
	98	return (fl1->proto == fl2->proto &&
	99	!memcmp(&fl1->uli_u, &fl2->uli_u, sizeof(fl1->uli_u)));
	100	}
	101
1da177e4	102	#endif