1 files changed, 118 insertions, 0 deletions
diff --git a/include/net/flow.h b/include/net/flow.h
new file mode 100644
index 00000000..bb08692a
--- /dev/null
+++ b/include/net/flow.h
@@ -0,0 +1,118 @@
+/*
+ *
+ *	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_ANYSRC 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 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, 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, 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(struct flowi *fl1, struct flowi *fl2)
+{
+	return (fl1->proto == fl2->proto &&
+		!memcmp(&fl1->uli_u, &fl2->uli_u, sizeof(fl1->uli_u)));
+}
+
+#endif