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diff --git a/netlink/librtnl/mapper.h b/netlink/librtnl/mapper.h
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+/*
+ * Copyright (c) 2016 Cisco and/or its affiliates.
+ * 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 MAPPER_H_
+#define MAPPER_H_
+
+#include <librtnl/netns.h>
+
+/*
+ * Automatically map linux network routes to VPP.
+ * Each namespace is associated with an individual fib.
+ *
+ * One linux interface can only be mapped to a single VPP
+ * interface, but one VPP interface can be mapped to
+ * multiple linux interfaces.
+ * A mapped VPP interface must not have any configured fib.
+ */
+
+int mapper_add_ns(char *nsname, u32 v4fib_index, u32 v6fib_index, u32 *nsindex);
+int mapper_del_ns(u32 nsindex);
+int mapper_add_del(u32 nsindex, int linux_ifindex, u32 sw_if_index, int del);
+
+#endif /* MAPPER_H_ */