tunnel: Userspace implementation of tunnel manipulation.

[sliver-openvswitch.git] / ofproto / tunnel.h

diff --git a/ofproto/tunnel.h b/ofproto/tunnel.h
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+/* Copyright (c) 2013 Nicira, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef TUNNEL_H
+#define TUNNEL_H 1
+
+#include <stdbool.h>
+#include <stdint.h>
+#include "flow.h"
+
+/* Tunnel port emulation layer.
+ *
+ * These functions emulate tunnel virtual ports based on the outer
+ * header information from the kernel. */
+
+struct ofport;
+struct tnl_port;
+
+bool tnl_port_reconfigure(const struct ofport *, uint32_t odp_port,
+                          struct tnl_port **);
+
+struct tnl_port *tnl_port_add(const struct ofport *, uint32_t odp_port);
+void tnl_port_del(struct tnl_port *);
+
+const struct ofport *tnl_port_receive(struct flow *);
+uint32_t tnl_port_send(const struct tnl_port *, struct flow *);
+
+/* Returns true if 'flow' should be submitted to tnl_port_receive(). */
+static inline bool
+tnl_port_should_receive(const struct flow *flow)
+{
+    return flow->tunnel.ip_dst != 0;
+}
+
+#endif /* tunnel.h */