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diff --git a/src/vnet/vxlan-gpe/vxlan_gpe.h b/src/vnet/vxlan-gpe/vxlan_gpe.h
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+/*
+ * Copyright (c) 2015 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.
+ */
+/**
+ * @file
+ * @brief VXLAN GPE definitions
+ *
+*/
+#ifndef included_vnet_vxlan_gpe_h
+#define included_vnet_vxlan_gpe_h
+
+#include <vppinfra/error.h>
+#include <vppinfra/hash.h>
+#include <vnet/vnet.h>
+#include <vnet/ip/ip.h>
+#include <vnet/l2/l2_input.h>
+#include <vnet/ethernet/ethernet.h>
+#include <vnet/vxlan-gpe/vxlan_gpe_packet.h>
+#include <vnet/ip/ip4_packet.h>
+#include <vnet/ip/ip6_packet.h>
+#include <vnet/ip/udp.h>
+
+/**
+ * @brief VXLAN GPE header struct
+ *
+ */
+typedef CLIB_PACKED (struct {
+ /** 20 bytes */
+ ip4_header_t ip4;
+ /** 8 bytes */
+ udp_header_t udp;
+ /** 8 bytes */
+ vxlan_gpe_header_t vxlan;
+}) ip4_vxlan_gpe_header_t;
+
+typedef CLIB_PACKED (struct {
+ /** 40 bytes */
+ ip6_header_t ip6;
+ /** 8 bytes */
+ udp_header_t udp;
+ /** 8 bytes */
+ vxlan_gpe_header_t vxlan;
+}) ip6_vxlan_gpe_header_t;
+
+/**
+ * @brief Key struct for IPv4 VXLAN GPE tunnel.
+ * Key fields: local remote, vni
+ * all fields in NET byte order
+ * VNI shifted 8 bits
+ */
+typedef CLIB_PACKED(struct {
+ union {
+ struct {
+ u32 local;
+ u32 remote;
+
+ u32 vni;
+ u32 pad;
+ };
+ u64 as_u64[2];
+ };
+}) vxlan4_gpe_tunnel_key_t;
+
+/**
+ * @brief Key struct for IPv6 VXLAN GPE tunnel.
+ * Key fields: local remote, vni
+ * all fields in NET byte order
+ * VNI shifted 8 bits
+ */
+typedef CLIB_PACKED(struct {
+ ip6_address_t local;
+ ip6_address_t remote;
+ u32 vni;
+}) vxlan6_gpe_tunnel_key_t;
+
+/**
+ * @brief Struct for VXLAN GPE tunnel
+ */
+typedef struct {
+ /** Rewrite string. $$$$ embed vnet_rewrite header */
+ u8 * rewrite;
+
+ /** encapsulated protocol */
+ u8 protocol;
+
+ /** tunnel local address */
+ ip46_address_t local;
+ /** tunnel remote address */
+ ip46_address_t remote;
+
+ /** FIB indices - tunnel partner lookup here */
+ u32 encap_fib_index;
+ /** FIB indices - inner IP packet lookup here */
+ u32 decap_fib_index;
+
+ /** VXLAN GPE VNI in HOST byte order, shifted left 8 bits */
+ u32 vni;
+
+ /** vnet intfc hw_if_index */
+ u32 hw_if_index;
+ /** vnet intfc sw_if_index */
+ u32 sw_if_index;
+
+ /** flags */
+ u32 flags;
+
+ /** rewrite size for dynamic plugins like iOAM */
+ u8 rewrite_size;
+
+ /** Next node after VxLAN-GPE encap */
+ uword encap_next_node;
+} vxlan_gpe_tunnel_t;
+
+/** Flags for vxlan_gpe_tunnel_t */
+#define VXLAN_GPE_TUNNEL_IS_IPV4 1
+
+/** next nodes for VXLAN GPE input */
+#define foreach_vxlan_gpe_input_next \
+_(DROP, "error-drop") \
+_(IP4_INPUT, "ip4-input") \
+_(IP6_INPUT, "ip6-input") \
+_(ETHERNET_INPUT, "ethernet-input")
+
+/** struct for next nodes for VXLAN GPE input */
+typedef enum {
+#define _(s,n) VXLAN_GPE_INPUT_NEXT_##s,
+ foreach_vxlan_gpe_input_next
+#undef _
+ VXLAN_GPE_INPUT_N_NEXT,
+} vxlan_gpe_input_next_t;
+
+/** struct for VXLAN GPE errors */
+typedef enum {
+#define vxlan_gpe_error(n,s) VXLAN_GPE_ERROR_##n,
+#include <vnet/vxlan-gpe/vxlan_gpe_error.def>
+#undef vxlan_gpe_error
+ VXLAN_GPE_N_ERROR,
+} vxlan_gpe_input_error_t;
+
+/** Struct for VXLAN GPE node state */
+typedef struct {
+ /** vector of encap tunnel instances */
+ vxlan_gpe_tunnel_t *tunnels;
+
+ /** lookup IPv4 VXLAN GPE tunnel by key */
+ uword * vxlan4_gpe_tunnel_by_key;
+ /** lookup IPv6 VXLAN GPE tunnel by key */
+ uword * vxlan6_gpe_tunnel_by_key;
+
+ /** Free vlib hw_if_indices */
+ u32 * free_vxlan_gpe_tunnel_hw_if_indices;
+
+ /** Mapping from sw_if_index to tunnel index */
+ u32 * tunnel_index_by_sw_if_index;
+
+ /** State convenience vlib_main_t */
+ vlib_main_t * vlib_main;
+ /** State convenience vnet_main_t */
+ vnet_main_t * vnet_main;
+
+ /** List of next nodes for the decap indexed on protocol */
+ uword decap_next_node_list[VXLAN_GPE_PROTOCOL_MAX];
+} vxlan_gpe_main_t;
+
+vxlan_gpe_main_t vxlan_gpe_main;
+
+extern vlib_node_registration_t vxlan_gpe_encap_node;
+extern vlib_node_registration_t vxlan4_gpe_input_node;
+extern vlib_node_registration_t vxlan6_gpe_input_node;
+
+u8 * format_vxlan_gpe_encap_trace (u8 * s, va_list * args);
+
+/** Struct for VXLAN GPE add/del args */
+typedef struct {
+ u8 is_add;
+ u8 is_ip6;
+ ip46_address_t local, remote;
+ u8 protocol;
+ u32 encap_fib_index;
+ u32 decap_fib_index;
+ u32 vni;
+} vnet_vxlan_gpe_add_del_tunnel_args_t;
+
+
+int vnet_vxlan_gpe_add_del_tunnel
+(vnet_vxlan_gpe_add_del_tunnel_args_t *a, u32 * sw_if_indexp);
+
+
+int vxlan4_gpe_rewrite (vxlan_gpe_tunnel_t * t, u32 extension_size,
+ u8 protocol_override, uword encap_next_node);
+int vxlan6_gpe_rewrite (vxlan_gpe_tunnel_t * t, u32 extension_size,
+ u8 protocol_override, uword encap_next_node);
+
+/**
+ * @brief Struct for defining VXLAN GPE next nodes
+ */
+typedef enum {
+ VXLAN_GPE_ENCAP_NEXT_IP4_LOOKUP,
+ VXLAN_GPE_ENCAP_NEXT_IP6_LOOKUP,
+ VXLAN_GPE_ENCAP_NEXT_DROP,
+ VXLAN_GPE_ENCAP_N_NEXT
+} vxlan_gpe_encap_next_t;
+
+
+void vxlan_gpe_unregister_decap_protocol (u8 protocol_id, uword next_node_index);
+
+void vxlan_gpe_register_decap_protocol (u8 protocol_id, uword next_node_index);
+
+
+#endif /* included_vnet_vxlan_gpe_h */