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/*
* Copyright (c) 2016 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 __FIB_PATH_EXT_H__
#define __FIB_PATH_EXT_H__
#include <vnet/mpls/mpls.h>
#include <vnet/fib/fib_types.h>
#include <vnet/dpo/load_balance.h>
/**
* A description of the type of path extension
*/
typedef enum fib_path_ext_type_t_
{
/**
* An MPLS extension that maintains the path's outgoing labels,
*/
FIB_PATH_EXT_MPLS,
/**
* A adj-source extension indicating the path's refinement criteria
* result
*/
FIB_PATH_EXT_ADJ,
} fib_path_ext_type_t;
/**
* Flags present on an ADJ sourced path-extension
*/
typedef enum fib_path_ext_adj_attr_t_
{
FIB_PATH_EXT_ADJ_ATTR_REFINES_COVER,
} fib_path_ext_adj_attr_t;
typedef enum fib_path_ext_adj_flags_t_
{
FIB_PATH_EXT_ADJ_FLAG_NONE = 0,
FIB_PATH_EXT_ADJ_FLAG_REFINES_COVER = (1 << FIB_PATH_EXT_ADJ_ATTR_REFINES_COVER),
} fib_path_ext_adj_flags_t;
#define FIB_PATH_EXT_ADJ_ATTR_NAMES { \
[FIB_PATH_EXT_ADJ_ATTR_REFINES_COVER] = "refines-cover", \
}
#define FOR_EACH_PATH_EXT_ADJ_ATTR(_item) \
for (_item = FIB_PATH_EXT_ADJ_ATTR_REFINES_COVER; \
_item <= FIB_PATH_EXT_ADJ_ATTR_REFINES_COVER; \
_item++)
/**
* A path extension is a per-entry addition to the forwarding information
* when packets are sent for that entry over that path.
*
* For example:
* ip route add 1.1.1.1/32 via 10.10.10.10 out-label 100
*
* The out-going MPLS label value 100 is a path-extension. It is a value sepcific
* to the entry 1.1.1.1/32 and valid only when packets are sent via 10.10.10.10.
*/
typedef struct fib_path_ext_t_
{
/**
* A description of the path that is being extended.
* This description is used to match this extension with the [changing]
* instance of a fib_path_t that is extended
*/
fib_route_path_t fpe_path;
#define fpe_label_stack fpe_path.frp_label_stack
union {
/**
* For an ADJ type extension
*
* Flags describing the adj state
*/
fib_path_ext_adj_flags_t fpe_adj_flags;
};
/**
* The type of path extension
*/
fib_path_ext_type_t fpe_type;
/**
* The index of the path. This is the global index, not the path's
* position in the path-list.
*/
fib_node_index_t fpe_path_index;
} __attribute__ ((packed)) fib_path_ext_t;
extern u8 * format_fib_path_ext(u8 * s, va_list * args);
extern int fib_path_ext_cmp(fib_path_ext_t *path_ext,
const fib_route_path_t *rpath);
extern void fib_path_ext_resolve(fib_path_ext_t *path_ext,
fib_node_index_t path_list_index);
extern load_balance_path_t *fib_path_ext_stack(fib_path_ext_t *path_ext,
fib_forward_chain_type_t fct,
fib_forward_chain_type_t imp_null_fct,
load_balance_path_t *nhs);
extern fib_path_ext_t * fib_path_ext_list_push_back (fib_path_ext_list_t *list,
fib_node_index_t path_list_index,
fib_path_ext_type_t ext_type,
const fib_route_path_t *rpath);
extern fib_path_ext_t * fib_path_ext_list_insert (fib_path_ext_list_t *list,
fib_node_index_t path_list_index,
fib_path_ext_type_t ext_type,
const fib_route_path_t *rpath);
extern u8* format_fib_path_ext_list (u8 * s, va_list * args);
extern void fib_path_ext_list_remove (fib_path_ext_list_t *list,
fib_path_ext_type_t ext_type,
const fib_route_path_t *rpath);
extern fib_path_ext_t * fib_path_ext_list_find (const fib_path_ext_list_t *list,
fib_path_ext_type_t ext_type,
const fib_route_path_t *rpath);
extern fib_path_ext_t * fib_path_ext_list_find_by_path_index (const fib_path_ext_list_t *list,
fib_node_index_t path_index);
extern void fib_path_ext_list_resolve(fib_path_ext_list_t *list,
fib_node_index_t path_list_index);
extern int fib_path_ext_list_length(const fib_path_ext_list_t *list);
extern void fib_path_ext_list_flush(fib_path_ext_list_t *list);
#endif
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