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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.
+ */
+
+#ifndef __MPLS_TUNNEL_H__
+#define __MPLS_TUNNEL_H__
+
+#include <vnet/mpls/mpls.h>
+
+/**
+ * @brief A uni-directional MPLS tunnel
+ */
+typedef struct mpls_tunnel_t_
+{
+ /**
+ * @brief The tunnel hooks into the FIB control plane graph.
+ */
+ fib_node_t mt_node;
+
+ /**
+ * @brief If the tunnel is an L2 tunnel, this is the link type ETHERNET
+ * adjacency
+ */
+ adj_index_t mt_l2_adj;
+
+ /**
+ * @brief on a L2 tunnel this is the VLIB arc from the L2-tx to the l2-midchain
+ */
+ u32 mt_l2_tx_arc;
+
+ /**
+ * @brief The path-list over which the tunnel's destination is reachable
+ */
+ fib_node_index_t mt_path_list;
+
+ /**
+ * @brief sibling index on the path-list so notifications are received.
+ */
+ u32 mt_sibling_index;
+
+ /**
+ * @brief The Label stack to apply to egress packets
+ */
+ mpls_label_t *mt_label_stack;
+
+ /**
+ * @brief Flag to indicate the tunnel is only for L2 traffic, that is
+ * this tunnel belongs in a bridge domain.
+ */
+ u8 mt_l2_only;
+
+ /**
+ * @brief The HW interface index of the tunnel interfaces
+ */
+ u32 mt_hw_if_index;
+
+ /**
+ * @brief The SW interface index of the tunnel interfaces
+ */
+ u32 mt_sw_if_index;
+
+} mpls_tunnel_t;
+
+/**
+ * @brief Create a new MPLS tunnel
+ */
+extern void vnet_mpls_tunnel_add (fib_route_path_t *rpath,
+ mpls_label_t *label_stack,
+ u8 l2_only,
+ u32 *sw_if_index);
+
+extern void vnet_mpls_tunnel_del (u32 sw_if_index);
+
+extern const mpls_tunnel_t *mpls_tunnel_get(u32 index);
+
+/**
+ * @brief Callback function invoked while walking MPLS tunnels
+ */
+typedef void (*mpls_tunnel_walk_cb_t)(u32 index, void *ctx);
+
+/**
+ * @brief Walk all the MPLS tunnels
+ */
+extern void mpls_tunnel_walk(mpls_tunnel_walk_cb_t cb,
+ void *ctx);
+
+#endif