1 files changed, 95 insertions, 0 deletions

diff --git a/include/net/flow.h b/include/net/flow.h
new file mode 100644
index 000000000000..9a5c94b1a0ec
--- /dev/null
+++ b/include/net/flow.h
@@ -0,0 +1,95 @@
+/*
+ *
+ *      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;
+
+        union {
+                struct {
+                        __u32                   daddr;
+                        __u32                   saddr;
+                        __u32                   fwmark;
+                        __u8                    tos;
+                        __u8                    scope;
+                } ip4_u;
+                
+                struct {
+                        struct in6_addr         daddr;
+                        struct in6_addr         saddr;
+                        __u32                   flowlabel;
+                } ip6_u;
+
+                struct {
+                        __u16                   daddr;
+                        __u16                   saddr;
+                        __u32                   fwmark;
+                        __u8                    scope;
+                } dn_u;
+        } nl_u;
+#define fld_dst         nl_u.dn_u.daddr
+#define fld_src         nl_u.dn_u.saddr
+#define fld_fwmark      nl_u.dn_u.fwmark
+#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_fwmark      nl_u.ip4_u.fwmark
+#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 {
+                        __u16   sport;
+                        __u16   dport;
+                } ports;
+
+                struct {
+                        __u8    type;
+                        __u8    code;
+                } icmpt;
+
+                struct {
+                        __u16   sport;
+                        __u16   dport;
+                        __u8    objnum;
+                        __u8    objnamel; /* Not 16 bits since max val is 16 */
+                        __u8    objname[16]; /* Not zero terminated */
+                } dnports;
+
+                __u32           spi;
+        } 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
+} __attribute__((__aligned__(BITS_PER_LONG/8)));
+
+#define FLOW_DIR_IN     0
+#define FLOW_DIR_OUT    1
+#define FLOW_DIR_FWD    2
+
+typedef void (*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;
+
+#endif