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 description of the type of path extension
26 typedef enum fib_path_ext_type_t_
29 * An MPLS extension that maintains the path's outgoing labels,
33 * A adj-source extension indicating the path's refinement criteria
37 } fib_path_ext_type_t;
40 * Flags present on an ADJ sourced path-extension
42 typedef enum fib_path_ext_adj_attr_t_
44 FIB_PATH_EXT_ADJ_ATTR_REFINES_COVER,
45 } fib_path_ext_adj_attr_t;
47 typedef enum fib_path_ext_adj_flags_t_
49 FIB_PATH_EXT_ADJ_FLAG_NONE = 0,
50 FIB_PATH_EXT_ADJ_FLAG_REFINES_COVER = (1 << FIB_PATH_EXT_ADJ_ATTR_REFINES_COVER),
51 } fib_path_ext_adj_flags_t;
53 #define FIB_PATH_EXT_ADJ_ATTR_NAMES { \
54 [FIB_PATH_EXT_ADJ_ATTR_REFINES_COVER] = "refines-cover", \
57 #define FOR_EACH_PATH_EXT_ADJ_ATTR(_item) \
58 for (_item = FIB_PATH_EXT_ADJ_ATTR_REFINES_COVER; \
59 _item <= FIB_PATH_EXT_ADJ_ATTR_REFINES_COVER; \
63 * Flags present on an MPLS label sourced path-extension
65 typedef enum fib_path_ext_mpls_attr_t_
68 * Do not decrement the TTL of IP packet during imposition
70 FIB_PATH_EXT_MPLS_ATTR_NO_IP_TTL_DECR,
71 } fib_path_ext_mpls_attr_t;
73 typedef enum fib_path_ext_mpls_flags_t_
75 FIB_PATH_EXT_MPLS_FLAG_NONE = 0,
76 FIB_PATH_EXT_MPLS_FLAG_NO_IP_TTL_DECR = (1 << FIB_PATH_EXT_MPLS_ATTR_NO_IP_TTL_DECR),
77 } fib_path_ext_mpls_flags_t;
79 #define FIB_PATH_EXT_MPLS_ATTR_NAMES { \
80 [FIB_PATH_EXT_MPLS_ATTR_NO_IP_TTL_DECR] = "no-ip-tll-decr", \
83 #define FOR_EACH_PATH_EXT_MPLS_ATTR(_item) \
84 for (_item = FIB_PATH_EXT_MPLS_ATTR_NO_IP_TTL_DECR; \
85 _item <= FIB_PATH_EXT_MPLS_ATTR_NO_IP_TTL_DECR; \
89 * A path extension is a per-entry addition to the forwarding information
90 * when packets are sent for that entry over that path.
93 * ip route add 1.1.1.1/32 via 10.10.10.10 out-label 100
95 * The out-going MPLS label value 100 is a path-extension. It is a value sepcific
96 * to the entry 1.1.1.1/32 and valid only when packets are sent via 10.10.10.10.
98 typedef struct fib_path_ext_t_
101 * A description of the path that is being extended.
102 * This description is used to match this extension with the [changing]
103 * instance of a fib_path_t that is extended
105 fib_route_path_t fpe_path;
106 #define fpe_label_stack fpe_path.frp_label_stack
110 * For an ADJ type extension
112 * Flags describing the adj state
114 fib_path_ext_adj_flags_t fpe_adj_flags;
116 * For an MPLS type extension
118 * Flags describing the mpls state
120 fib_path_ext_mpls_flags_t fpe_mpls_flags;
124 * The type of path extension
126 fib_path_ext_type_t fpe_type;
129 * The index of the path. This is the global index, not the path's
130 * position in the path-list.
132 fib_node_index_t fpe_path_index;
133 } __attribute__ ((packed)) fib_path_ext_t;
135 extern u8 * format_fib_path_ext(u8 * s, va_list * args);
137 extern int fib_path_ext_cmp(fib_path_ext_t *path_ext,
138 const fib_route_path_t *rpath);
140 extern void fib_path_ext_resolve(fib_path_ext_t *path_ext,
141 fib_node_index_t path_list_index);
143 extern load_balance_path_t *fib_path_ext_stack(fib_path_ext_t *path_ext,
144 fib_forward_chain_type_t fct,
145 fib_forward_chain_type_t imp_null_fct,
146 load_balance_path_t *nhs);
148 extern fib_path_ext_t * fib_path_ext_list_push_back (fib_path_ext_list_t *list,
149 fib_node_index_t path_list_index,
150 fib_path_ext_type_t ext_type,
151 const fib_route_path_t *rpath);
153 extern fib_path_ext_t * fib_path_ext_list_insert (fib_path_ext_list_t *list,
154 fib_node_index_t path_list_index,
155 fib_path_ext_type_t ext_type,
156 const fib_route_path_t *rpath);
158 extern u8* format_fib_path_ext_list (u8 * s, va_list * args);
160 extern void fib_path_ext_list_remove (fib_path_ext_list_t *list,
161 fib_path_ext_type_t ext_type,
162 const fib_route_path_t *rpath);
164 extern fib_path_ext_t * fib_path_ext_list_find (const fib_path_ext_list_t *list,
165 fib_path_ext_type_t ext_type,
166 const fib_route_path_t *rpath);
167 extern fib_path_ext_t * fib_path_ext_list_find_by_path_index (const fib_path_ext_list_t *list,
168 fib_node_index_t path_index);
169 extern void fib_path_ext_list_resolve(fib_path_ext_list_t *list,
170 fib_node_index_t path_list_index);
172 extern int fib_path_ext_list_length(const fib_path_ext_list_t *list);
173 extern void fib_path_ext_list_flush(fib_path_ext_list_t *list);