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diff --git a/src/plugins/nsh/nsh-md2-ioam/nsh_md2_ioam.h b/src/plugins/nsh/nsh-md2-ioam/nsh_md2_ioam.h
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+/*
+ * Copyright (c) 2017 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_nsh_md2_ioam_h__
+#define __included_nsh_md2_ioam_h__
+
+#include <nsh/nsh.h>
+#include <nsh/nsh_packet.h>
+#include <vnet/ip/ip.h>
+#include <vnet/ip/ip4_packet.h>
+#include <vnet/ip/ip6_packet.h>
+
+
+typedef struct nsh_md2_ioam_sw_interface_
+{
+ u32 sw_if_index;
+} nsh_md2_ioam_sw_interface_t;
+
+typedef struct nsh_md2_ioam_dest_tunnels_
+{
+ ip46_address_t dst_addr;
+ u32 fp_proto;
+ u32 sibling_index;
+ fib_node_index_t fib_entry_index;
+ u32 outer_fib_index;
+} nsh_md2_ioam_dest_tunnels_t;
+
+typedef struct nsh_md2_ioam_main_
+{
+ /**
+ * Linkage into the FIB object graph
+ */
+ fib_node_t node;
+
+ /* time scale transform. Joy. */
+ u32 unix_time_0;
+ f64 vlib_time_0;
+
+
+ /* Trace option */
+ u8 has_trace_option;
+
+ /* Pot option */
+ u8 has_pot_option;
+
+#define PPC_NONE 0
+#define PPC_ENCAP 1
+#define PPC_DECAP 2
+ u8 has_ppc_option;
+
+#define TSP_SECONDS 0
+#define TSP_MILLISECONDS 1
+#define TSP_MICROSECONDS 2
+#define TSP_NANOSECONDS 3
+
+
+ /* API message ID base */
+ u16 msg_id_base;
+
+ /* Override to export for iOAM */
+ uword decap_v4_next_override;
+ uword decap_v6_next_override;
+
+ /* sequence of node graph for encap */
+ uword encap_v4_next_node;
+ uword encap_v6_next_node;
+
+ /* Software interfaces. */
+ nsh_md2_ioam_sw_interface_t *sw_interfaces;
+
+ /* hash ip4/ip6 -> list of destinations for doing transit iOAM operation */
+ nsh_md2_ioam_dest_tunnels_t *dst_tunnels;
+ uword *dst_by_ip4;
+ uword *dst_by_ip6;
+
+ /** per sw_if_index, to maintain bitmap */
+ u8 *bool_ref_by_sw_if_index;
+ fib_node_type_t fib_entry_type;
+
+
+} nsh_md2_ioam_main_t;
+extern nsh_md2_ioam_main_t nsh_md2_ioam_main;
+
+/*
+ * Primary h-b-h handler trace support
+ */
+typedef struct
+{
+ u32 next_index;
+ u32 trace_len;
+ u8 option_data[256];
+} ioam_trace_t;
+
+
+clib_error_t *nsh_md2_ioam_enable_disable (int has_trace_option,
+ int has_pot_option,
+ int has_ppc_option);
+
+
+
+int nsh_md2_ioam_trace_profile_setup (void);
+
+int nsh_md2_ioam_trace_profile_cleanup (void);
+extern void nsh_md2_ioam_interface_init (void);
+
+
+
+#endif