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diff --git a/hicn-plugin/src/interest_pcslookup.h b/hicn-plugin/src/interest_pcslookup.h
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+++ b/hicn-plugin/src/interest_pcslookup.h
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+/*
+ * Copyright (c) 2017-2019 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 __HICN_INTEREST_PCSLOOKUP_H__
+#define __HICN_INTEREST_PCSLOOKUP_H__
+
+#include <vlib/vlib.h>
+#include <vnet/vnet.h>
+
+#include "pcs.h"
+
+/**
+ * @file interest_pcslookup.h
+ *
+ * This is the node encoutered by interest packets after the hicn6-iface-input or
+ * hicn4-iface-input. This node performs a lookup in the pit and content store and
+ * if there is a hit in the PIT, the vlib buffer is passed to the hicn-interest-hitcs
+ * while if there is a hit in the CS  the vlib buffer is passed to the
+ * hicn-interest-hitpit. If there isn't any hit, the vlib buffer is passed to the
+ * hicn-strategy node.
+ */
+
+/*
+ * Node context data; we think this is per-thread/instance
+ */
+typedef struct hicn_interest_pcslookup_runtime_s
+{
+  int id;
+  hicn_pit_cs_t *pitcs;
+} hicn_interest_pcslookup_runtime_t;
+
+/* Trace context struct */
+typedef struct
+{
+  u32 next_index;
+  u32 sw_if_index;
+  u8 pkt_type;
+} hicn_interest_pcslookup_trace_t;
+
+typedef enum
+{
+  HICN_INTEREST_PCSLOOKUP_NEXT_STRATEGY,
+  HICN_INTEREST_PCSLOOKUP_NEXT_INTEREST_HITPIT,
+  HICN_INTEREST_PCSLOOKUP_NEXT_INTEREST_HITCS,
+  HICN_INTEREST_PCSLOOKUP_NEXT_ERROR_DROP,
+  HICN_INTEREST_PCSLOOKUP_N_NEXT,
+} hicn_interest_pcslookup_next_t;
+
+#endif /* // __HICN_INTEREST_PCSLOOKUP_H__ */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables: eval: (c-set-style "gnu") End:
+ */