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Diffstat (limited to 'src/vnet/fib/fib_path_ext.h')
| -rw-r--r-- | src/vnet/fib/fib_path_ext.h | 144 |
1 files changed, 144 insertions, 0 deletions
diff --git a/src/vnet/fib/fib_path_ext.h b/src/vnet/fib/fib_path_ext.h new file mode 100644 index 00000000..d07941c1 --- /dev/null +++ b/src/vnet/fib/fib_path_ext.h @@ -0,0 +1,144 @@ +/* + * 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 + |