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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>
#include <vnet/fib/fib_path_ext.h>
typedef enum mpls_tunnel_attribute_t_
{
MPLS_TUNNEL_ATTRIBUTE_FIRST = 0,
/**
* @brief The tunnel has an underlying multicast LSP
*/
MPLS_TUNNEL_ATTRIBUTE_MCAST = MPLS_TUNNEL_ATTRIBUTE_FIRST,
MPLS_TUNNEL_ATTRIBUTE_LAST = MPLS_TUNNEL_ATTRIBUTE_MCAST,
} mpls_tunnel_attribute_t;
#define MPLS_TUNNEL_ATTRIBUTES { \
[MPLS_TUNNEL_ATTRIBUTE_MCAST] = "multicast", \
}
#define FOR_EACH_MPLS_TUNNEL_ATTRIBUTE(_item) \
for (_item = MPLS_TUNNEL_ATTRIBUTE_FIRST; \
_item < MPLS_TUNNEL_ATTRIBUTE_LAST; \
_item++)
typedef enum mpls_tunnel_flag_t_ {
MPLS_TUNNEL_FLAG_NONE = 0,
MPLS_TUNNEL_FLAG_MCAST = (1 << MPLS_TUNNEL_ATTRIBUTE_MCAST),
} __attribute__ ((packed)) mpls_tunnel_flags_t;
/**
* @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 Tunnel flags
*/
mpls_tunnel_flags_t mt_flags;
/**
* @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;
/**
* A vector of path extensions o hold the label stack for each path
*/
fib_path_ext_t *mt_path_exts;
/**
* @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
* @return the SW Interface index of the newly created tuneel
*/
extern u32 vnet_mpls_tunnel_create (u8 l2_only,
u8 is_multicast);
/**
* @brief Add a path to an MPLS tunnel
*/
extern void vnet_mpls_tunnel_path_add (u32 sw_if_index,
fib_route_path_t *rpath);
/**
* @brief remove a path from a tunnel.
* @return the number of remaining paths. 0 implies the tunnel can be deleted
*/
extern int vnet_mpls_tunnel_path_remove (u32 sw_if_index,
fib_route_path_t *rpath);
/**
* @brief Delete an MPLS tunnel
*/
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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