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diff --git a/src/plugins/arping/arping.h b/src/plugins/arping/arping.h
new file mode 100644
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+++ b/src/plugins/arping/arping.h
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+/*
+ * Copyright (c) 2021 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 included_arping_arping_h
+#define included_arping_arping_h
+
+#include <vnet/ip/ip_types.h>
+#include <vnet/ethernet/arp_packet.h>
+
+#define ARPING_DEFAULT_INTERVAL 1.0
+#define ARPING_DEFAULT_REPEAT	1
+
+typedef struct arping6_ip6_reply_t
+{
+  mac_address_t mac;
+  ip6_address_t ip6;
+} arping6_ip6_reply_t;
+
+typedef CLIB_PACKED (union arping46_reply_ {
+  ethernet_arp_ip4_over_ethernet_address_t from4;
+  arping6_ip6_reply_t from6;
+}) arping46_reply_t;
+
+typedef struct arping_intf_t
+{
+  CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);
+  f64 interval;
+  u32 repeat;
+  ip_address_t address;
+
+  arping46_reply_t recv;
+  u32 reply_count;
+} arping_intf_t;
+
+typedef struct arping_main_t
+{
+  arping_intf_t *arping_interfaces;
+  arping_intf_t **interfaces;
+  u16 msg_id_base;
+} arping_main_t;
+
+typedef struct arping_args_t
+{
+  ip_address_t address;
+  u32 sw_if_index;
+  u32 repeat;
+  f64 interval;
+  u8 is_garp;
+  u8 silence;
+
+  /* reply */
+  i32 rv;
+  u32 reply_count;
+  arping46_reply_t recv;
+  clib_error_t *error;
+} arping_args_t;
+
+extern arping_main_t arping_main;
+
+extern clib_error_t *arping_plugin_api_hookup (vlib_main_t *vm);
+extern void arping_run_command (vlib_main_t *vm, arping_args_t *args);
+
+#endif /* included_arping_arping_h */