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diff --git a/src/vnet/fib/fib_entry_cover.h b/src/vnet/fib/fib_entry_cover.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 __FIB_ENTRY_COVER_H__
+#define __FIB_ENTRY_COVER_H__
+
+#include "fib_entry.h"
+
+/**
+ * callback function used when walking the covered entries
+ */
+typedef int (*fib_entry_covered_walk_t)(fib_entry_t *cover,
+ fib_node_index_t covered,
+ void *ctx);
+
+extern u32 fib_entry_cover_track(fib_entry_t *cover,
+ fib_node_index_t covered);
+
+extern void fib_entry_cover_untrack(fib_entry_t *cover,
+ u32 tracked_index);
+
+extern void fib_entry_cover_walk(fib_entry_t *cover,
+ fib_entry_covered_walk_t walk,
+ void *ctx);
+
+extern void fib_entry_cover_change_notify(fib_node_index_t cover_index,
+ fib_node_index_t covered_index);
+extern void fib_entry_cover_update_notify(fib_entry_t *cover);
+
+#endif