/* * 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 is L2 only */ MPLS_TUNNEL_ATTRIBUTE_L2 = MPLS_TUNNEL_ATTRIBUTE_FIRST, /** * @brief The tunnel has an underlying multicast LSP */ MPLS_TUNNEL_ATTRIBUTE_MCAST, MPLS_TUNNEL_ATTRIBUTE_LAST = MPLS_TUNNEL_ATTRIBUTE_MCAST, } mpls_tunnel_attribute_t; #define MPLS_TUNNEL_ATTRIBUTES { \ [MPLS_TUNNEL_ATTRIBUTE_MCAST] = "multicast", \ [MPLS_TUNNEL_ATTRIBUTE_L2] = "L2", \ } #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_L2 = (1 << MPLS_TUNNEL_ATTRIBUTE_L2), 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 * load-balance */ dpo_id_t mt_l2_lb; /** * @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; /** * @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_list_t mt_path_exts; } 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