2 * Copyright (c) 2016 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
16 #ifndef __FIB_PATH_EXT_H__
17 #define __FIB_PATH_EXT_H__
19 #include <vnet/mpls/mpls.h>
20 #include <vnet/fib/fib_types.h>
21 #include <vnet/dpo/load_balance.h>
24 * A path extension is a per-entry addition to the forwarding information
25 * when packets are sent for that entry over that path.
28 * ip route add 1.1.1.1/32 via 10.10.10.10 out-label 100
30 * The out-going MPLS label value 100 is a path-extension. It is a value sepcific
31 * to the entry 1.1.1.1/32 and valid only when packets are sent via 10.10.10.10.
33 typedef struct fib_path_ext_t_
36 * A description of the path that is being extended.
37 * This description is used to match this extension with the [changing]
38 * instance of a fib_path_t that is extended
40 fib_route_path_t fpe_path;
41 #define fpe_label_stack fpe_path.frp_label_stack
44 * The index of the path. This is the global index, not the path's
45 * position in the path-list.
47 fib_node_index_t fpe_path_index;
52 extern u8 * format_fib_path_ext(u8 * s, va_list * args);
54 extern void fib_path_ext_init(fib_path_ext_t *path_ext,
55 fib_node_index_t path_list_index,
56 const fib_route_path_t *rpath);
58 extern int fib_path_ext_cmp(fib_path_ext_t *path_ext,
59 const fib_route_path_t *rpath);
61 extern void fib_path_ext_resolve(fib_path_ext_t *path_ext,
62 fib_node_index_t path_list_index);
64 extern load_balance_path_t *fib_path_ext_stack(fib_path_ext_t *path_ext,
65 fib_forward_chain_type_t fct,
66 fib_forward_chain_type_t imp_null_fct,
67 load_balance_path_t *nhs);