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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
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