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mfib_table.h
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1 /*
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:
6  *
7  * http://www.apache.org/licenses/LICENSE-2.0
8  *
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.
14  */
15 
16 #ifndef __MFIB_TABLE_H__
17 #define __MFIB_TABLE_H__
18 
19 #include <vnet/ip/ip.h>
20 #include <vnet/adj/adj.h>
21 #include <vnet/dpo/replicate_dpo.h>
22 
23 #include <vnet/mfib/mfib_types.h>
24 
25 /**
26  * Keep a lock per-source and a total
27  */
28 #define MFIB_TABLE_N_LOCKS (MFIB_N_SOURCES+1)
29 #define MFIB_TABLE_TOTAL_LOCKS MFIB_N_SOURCES
30 
31 /**
32  * Flags for the source data
33  */
35  /**
36  * Marker. Add new values after this one.
37  */
39  /**
40  * the table is currently resync-ing
41  */
43  /**
44  * Marker. add new entries before this one.
45  */
48 
49 #define MFIB_TABLE_ATTRIBUTE_MAX (MFIB_TABLE_ATTRIBUTE_LAST+1)
50 
51 #define MFIB_TABLE_ATTRIBUTES { \
52  [MFIB_TABLE_ATTRIBUTE_RESYNC] = "resync", \
53 }
54 
55 #define FOR_EACH_MFIB_TABLE_ATTRIBUTE(_item) \
56  for (_item = MFIB_TABLE_ATTRIBUTE_FIRST; \
57  _item < MFIB_TABLE_ATTRIBUTE_MAX; \
58  _item++)
59 
60 typedef enum mfib_table_flags_t_ {
63 } __attribute__ ((packed)) mfib_table_flags_t;
64 
65 extern u8* format_mfib_table_flags(u8 *s, va_list *args);
66 
67 /**
68  * @brief
69  * A protocol Independent IP multicast FIB table
70  */
71 typedef struct mfib_table_t_
72 {
73  /**
74  * Required for pool_get_aligned
75  */
76  CLIB_CACHE_LINE_ALIGN_MARK(cacheline0);
77 
78  /**
79  * A union of the protocol specific FIBs that provide the
80  * underlying LPM mechanism.
81  * This element is first in the struct so that it is in the
82  * first cache line.
83  */
84  union {
87  };
88 
89  /**
90  * Which protocol this table serves. Used to switch on the union above.
91  */
93 
94  /**
95  * table falgs
96  */
98 
99  /**
100  * number of locks on the table
101  */
103 
104  /**
105  * Table ID (hash key) for this FIB.
106  */
108 
109  /**
110  * resync epoch
111  */
113 
114  /**
115  * Index into FIB vector.
116  */
118 
119  /**
120  * Total route counters
121  */
123 
124  /**
125  * Table description
126  */
128 } mfib_table_t;
129 
130 /**
131  * @brief
132  * Format the description/name of the table
133  */
134 extern u8* format_mfib_table_name(u8* s, va_list *ap);
135 
136 /**
137  * @brief
138  * Perfom a longest prefix match in the non-forwarding table
139  *
140  * @param fib_index
141  * The index of the FIB
142  *
143  * @param prefix
144  * The prefix to lookup
145  *
146  * @return
147  * The index of the fib_entry_t for the best match, which may be the default route
148  */
149 extern fib_node_index_t mfib_table_lookup(u32 fib_index,
150  const mfib_prefix_t *prefix);
151 
152 /**
153  * @brief
154  * Perfom an exact match in the non-forwarding table
155  *
156  * @param fib_index
157  * The index of the FIB
158  *
159  * @param prefix
160  * The prefix to lookup
161  *
162  * @return
163  * The index of the fib_entry_t for the exact match, or INVALID
164  * is there is no match.
165  */
167  const mfib_prefix_t *prefix);
168 
169 /**
170  * @brief
171  * Add a new (with no replication) or lock an existing entry
172  *
173  * @param prefix
174  * The prefix for the entry to add
175  *
176  * @return
177  * the index of the fib_entry_t that is created (or existed already).
178  */
180  const mfib_prefix_t *prefix,
181  mfib_source_t source,
184 
185 /**
186  * @brief
187  * Add n paths to an entry (aka route) in the FIB. If the entry does not
188  * exist, it will be created.
189  * See the documentation for fib_route_path_t for more descirptions of
190  * the path parameters.
191  *
192  * @param fib_index
193  * The index of the FIB
194  *
195  * @param prefix
196  * The prefix for the entry to add
197  *
198  * @param source
199  * The ID of the client/source adding the entry.
200  *
201  * @param flags
202  * Flags for the entry.
203  *
204  * @param rpaths
205  * A vector of paths.
206  *
207  * @return
208  * the index of the fib_entry_t that is created (or existed already).
209  */
211  const mfib_prefix_t *prefix,
212  mfib_source_t source,
213  const fib_route_path_t *rpath);
215  const mfib_prefix_t *prefix,
216  mfib_source_t source,
217  const fib_route_path_t *rpath);
218 
219 /**
220  * @brief
221  * Remove n paths to an entry (aka route) in the FIB. If this is the entry's
222  * last path, then the entry will be removed, unless it has other sources.
223  * See the documentation for fib_route_path_t for more descirptions of
224  * the path parameters.
225  *
226  * @param fib_index
227  * The index of the FIB
228  *
229  * @param prefix
230  * The prefix for the entry to add
231  *
232  * @param source
233  * The ID of the client/source adding the entry.
234  *
235  * @param rpaths
236  * A vector of paths.
237  */
238 extern void mfib_table_entry_path_remove(u32 fib_index,
239  const mfib_prefix_t *prefix,
240  mfib_source_t source,
241  const fib_route_path_t *paths);
242 extern void mfib_table_entry_paths_remove(u32 fib_index,
243  const mfib_prefix_t *prefix,
244  mfib_source_t source,
245  const fib_route_path_t *paths);
246 
247 
248 
249 /**
250  * @brief
251  * Delete a FIB entry. If the entry has no more sources, then it is
252  * removed from the table.
253  *
254  * @param fib_index
255  * The index of the FIB
256  *
257  * @param prefix
258  * The prefix for the entry to remove
259  *
260  * @param source
261  * The ID of the client/source adding the entry.
262  */
263 extern void mfib_table_entry_delete(u32 fib_index,
264  const mfib_prefix_t *prefix,
265  mfib_source_t source);
266 
267 /**
268  * @brief
269  * Delete a FIB entry. If the entry has no more sources, then it is
270  * removed from the table.
271  *
272  * @param entry_index
273  * The index of the FIB entry
274  *
275  * @param source
276  * The ID of the client/source adding the entry.
277  */
278 extern void mfib_table_entry_delete_index(fib_node_index_t entry_index,
279  mfib_source_t source);
280 
281 /**
282  * @brief
283  * Add a 'special' entry to the mFIB that links to the DPO passed
284  * A special entry is an entry that the FIB is not expect to resolve
285  * via the usual mechanisms (i.e. recurisve or neighbour adj DB lookup).
286  * Instead the client/source provides the index of a replicate DPO to link to.
287  *
288  * @param fib_index
289  * The index of the FIB
290  *
291  * @param prefix
292  * The prefix to add
293  *
294  * @param source
295  * The ID of the client/source adding the entry.
296  *
297  * @param flags
298  * Flags for the entry.
299  *
300  * @param rep_dpo
301  * The replicate DPO index to link to.
302  *
303  * @return
304  * the index of the fib_entry_t that is created (or existed already).
305  */
307  const mfib_prefix_t *prefix,
308  mfib_source_t source,
310  index_t rep_dpo);
311 
312 /**
313  * @brief
314  * Flush all entries from a table for the source
315  *
316  * @param fib_index
317  * The index of the FIB
318  *
319  * @paran proto
320  * The protocol of the entries in the table
321  *
322  * @param source
323  * the source to flush
324  */
325 extern void mfib_table_flush(u32 fib_index,
327  mfib_source_t source);
328 
329 /**
330  * @brief
331  * Resync all entries from a table for the source
332  * this is the mark part of the mark and sweep algorithm.
333  * All entries in this FIB that are sourced by 'source' are marked
334  * as stale.
335  *
336  * @param fib_index
337  * The index of the FIB
338  *
339  * @paran proto
340  * The protocol of the entries in the table
341  *
342  * @param source
343  * the source to flush
344  */
345 extern void mfib_table_mark(u32 fib_index,
347  mfib_source_t source);
348 
349 /**
350  * @brief
351  * Signal that the table has converged, i.e. all updates are complete.
352  * this is the sweep part of the mark and sweep algorithm.
353  * All entries in this FIB that are sourced by 'source' and marked
354  * as stale are flushed.
355  *
356  * @param fib_index
357  * The index of the FIB
358  *
359  * @paran proto
360  * The protocol of the entries in the table
361  *
362  * @param source
363  * the source to flush
364  */
365 extern void mfib_table_sweep(u32 fib_index,
367  mfib_source_t source);
368 
369 /**
370  * @brief
371  * Get the index of the FIB bound to the interface
372  *
373  * @paran proto
374  * The protocol of the FIB (and thus the entries therein)
375  *
376  * @param sw_if_index
377  * The interface index
378  *
379  * @return fib_index
380  * The index of the FIB
381  */
383  u32 sw_if_index);
384 
385 /**
386  * @brief
387  * Get the Table-ID of the FIB from protocol and index
388  *
389  * @param fib_index
390  * The FIB index
391  *
392  * @paran proto
393  * The protocol of the FIB (and thus the entries therein)
394  *
395  * @return fib_index
396  * The tableID of the FIB
397  */
399 
400 /**
401  * @brief
402  * Get the index of the FIB for a Table-ID. This DOES NOT create the
403  * FIB if it does not exist.
404  *
405  * @paran proto
406  * The protocol of the FIB (and thus the entries therein)
407  *
408  * @param table-id
409  * The Table-ID
410  *
411  * @return fib_index
412  * The index of the FIB, which may be INVALID.
413  */
415 
416 /**
417  * @brief
418  * Get the Table-ID of the FIB from protocol and index
419  *
420  * @param fib_index
421  * The FIB index
422  *
423  * @paran proto
424  * The protocol of the FIB (and thus the entries therein)
425  *
426  * @return fib_index
427  * The tableID of the FIB
428  */
430 
431 /**
432  * @brief
433  * Get the index of the FIB for a Table-ID. This DOES create the
434  * FIB if it does not exist.
435  *
436  * @paran proto
437  * The protocol of the FIB (and thus the entries therein)
438  *
439  * @param table-id
440  * The Table-ID
441  *
442  * @return fib_index
443  * The index of the FIB
444  *
445  * @param source
446  * The ID of the client/source.
447  */
449  u32 table_id,
450  mfib_source_t source);
451 
452 /**
453  * @brief
454  * Get the index of the FIB for a Table-ID. This DOES create the
455  * FIB if it does not exist.
456  *
457  * @paran proto
458  * The protocol of the FIB (and thus the entries therein)
459  *
460  * @param table-id
461  * The Table-ID
462  *
463  * @return fib_index
464  * The index of the FIB
465  *
466  * @param source
467  * The ID of the client/source.
468  *
469  * @param name
470  * The client is choosing the name they want the table to have
471  */
473  u32 table_id,
474  mfib_source_t source,
475  const u8 *name);
476 
477 
478 /**
479  * @brief
480  * Take a reference counting lock on the table
481  *
482  * @param fib_index
483  * The index of the FIB
484  *
485  * @paran proto
486  * The protocol of the FIB (and thus the entries therein)
487  *
488  * @param source
489  * The ID of the client/source.
490  */
491 extern void mfib_table_unlock(u32 fib_index,
493  mfib_source_t source);
494 
495 /**
496  * @brief
497  * Release a reference counting lock on the table. When the last lock
498  * has gone. the FIB is deleted.
499  *
500  * @param fib_index
501  * The index of the FIB
502  *
503  * @paran proto
504  * The protocol of the FIB (and thus the entries therein)
505  *
506  * @param source
507  * The ID of the client/source.
508  */
509 extern void mfib_table_lock(u32 fib_index,
511  mfib_source_t source);
512 
513 /**
514  * @brief
515  * Return the number of entries in the FIB added by a given source.
516  *
517  * @param fib_index
518  * The index of the FIB
519  *
520  * @paran proto
521  * The protocol of the FIB (and thus the entries therein)
522  *
523  * @return number of sourced entries.
524  */
525 extern u32 mfib_table_get_num_entries(u32 fib_index,
527 
528 /**
529  * @brief
530  * Get the less specific (covering) prefix
531  *
532  * @param fib_index
533  * The index of the FIB
534  *
535  * @param prefix
536  * The prefix to lookup
537  *
538  * @return
539  * The index of the less specific fib_entry_t.
540  */
542  const mfib_prefix_t *prefix);
543 
544 /**
545  * @brief
546  * Get a pointer to a FIB table
547  */
550 
551 /**
552  * @brief Call back function when walking entries in a FIB table
553  */
555  void *ctx);
556 
557 /**
558  * @brief Walk all entries in a FIB table
559  * N.B: This is NOT safe to deletes. If you need to delete, walk the whole
560  * table and store elements in a vector, then delete the elements
561  */
562 extern void mfib_table_walk(u32 fib_index,
565  void *ctx);
566 /**
567  * @brief format (display) the memory usage for mfibs
568  */
569 extern u8 * format_mfib_table_memory(u8 * s, va_list * args);
570 
571 /**
572  * To assit UT
573  */
576 
577 
578 #endif
mfib_table_flush
void mfib_table_flush(u32 fib_index, fib_protocol_t proto, mfib_source_t source)
Flush all entries from a table for the source.
Definition: mfib_table.c:662
mfib_table_t_::mft_locks
u32 mft_locks[MFIB_TABLE_N_LOCKS]
number of locks on the table
Definition: mfib_table.h:102
format_mfib_table_flags
u8 * format_mfib_table_flags(u8 *s, va_list *args)
Definition: mfib_table.c:848
adj.h
MFIB_TABLE_FLAG_NONE
@ MFIB_TABLE_FLAG_NONE
Definition: mfib_table.h:61
mfib_table_entry_path_update
fib_node_index_t mfib_table_entry_path_update(u32 fib_index, const mfib_prefix_t *prefix, mfib_source_t source, const fib_route_path_t *rpath)
Add n paths to an entry (aka route) in the FIB.
Definition: mfib_table.c:325
mfib_table_t_::CLIB_CACHE_LINE_ALIGN_MARK
CLIB_CACHE_LINE_ALIGN_MARK(cacheline0)
Required for pool_get_aligned.
mfib_table_get_num_entries
u32 mfib_table_get_num_entries(u32 fib_index, fib_protocol_t proto)
Return the number of entries in the FIB added by a given source.
mfib_table_lock
void mfib_table_lock(u32 fib_index, fib_protocol_t proto, mfib_source_t source)
Release a reference counting lock on the table.
Definition: mfib_table.c:806
mfib_table_t_::v6
ip6_mfib_t v6
Definition: mfib_table.h:86
mfib_table_t
struct mfib_table_t_ mfib_table_t
A protocol Independent IP multicast FIB table.
name
string name[64]
Definition: fib.api:25
mfib_table_t_::mft_total_route_counts
u32 mft_total_route_counts
Total route counters.
Definition: mfib_table.h:122
mfib_prefix_t_
Aggregate type for a prefix.
Definition: mfib_types.h:24
mfib_table_unlock
void mfib_table_unlock(u32 fib_index, fib_protocol_t proto, mfib_source_t source)
Take a reference counting lock on the table.
Definition: mfib_table.c:777
mfib_table_attribute_t
enum mfib_table_attribute_t_ mfib_table_attribute_t
Flags for the source data.
format_mfib_table_memory
u8 * format_mfib_table_memory(u8 *s, va_list *args)
format (display) the memory usage for mfibs
Definition: mfib_table.c:882
paths
paths
Definition: map.api:460
mfib_entry_flags_t
enum mfib_entry_flags_t_ mfib_entry_flags_t
mfib_table_find_or_create_and_lock
u32 mfib_table_find_or_create_and_lock(fib_protocol_t proto, u32 table_id, mfib_source_t source)
Get the index of the FIB for a Table-ID.
Definition: mfib_table.c:613
mfib_table_t_
A protocol Independent IP multicast FIB table.
Definition: mfib_table.h:71
mfib_table_sweep
void mfib_table_sweep(u32 fib_index, fib_protocol_t proto, mfib_source_t source)
Signal that the table has converged, i.e.
Definition: mfib_table.c:731
replicate_dpo.h
mfib_table_entry_delete_index
void mfib_table_entry_delete_index(fib_node_index_t entry_index, mfib_source_t source)
Delete a FIB entry.
Definition: mfib_table.c:517
mfib_table_flags_t
enum mfib_table_flags_t_ mfib_table_flags_t
mfib_source_t
enum mfib_source_t_ mfib_source_t
Possible [control plane] sources of MFIB entries.
mfib_table_entry_update
fib_node_index_t mfib_table_entry_update(u32 fib_index, const mfib_prefix_t *prefix, mfib_source_t source, fib_rpf_id_t rpf_id, mfib_entry_flags_t flags)
Add a new (with no replication) or lock an existing entry.
Definition: mfib_table.c:237
fib_rpf_id_t
u32 fib_rpf_id_t
An RPF-ID is numerical value that is used RPF validate.
Definition: fib_types.h:421
mfib_table_t_::mft_index
fib_node_index_t mft_index
Index into FIB vector.
Definition: mfib_table.h:117
mfib_table_lookup_exact_match
fib_node_index_t mfib_table_lookup_exact_match(u32 fib_index, const mfib_prefix_t *prefix)
Perfom an exact match in the non-forwarding table.
Definition: mfib_table.c:98
mfib_table_entry_delete
void mfib_table_entry_delete(u32 fib_index, const mfib_prefix_t *prefix, mfib_source_t source)
Delete a FIB entry.
Definition: mfib_table.c:493
mfib_table_flags_t_
mfib_table_flags_t_
Definition: mfib_table.h:60
MFIB_TABLE_ATTRIBUTE_LAST
@ MFIB_TABLE_ATTRIBUTE_LAST
Marker.
Definition: mfib_table.h:46
mfib_table_lookup
fib_node_index_t mfib_table_lookup(u32 fib_index, const mfib_prefix_t *prefix)
Perfom a longest prefix match in the non-forwarding table.
Definition: mfib_table.c:69
mfib_table_entry_paths_remove
void mfib_table_entry_paths_remove(u32 fib_index, const mfib_prefix_t *prefix, mfib_source_t source, const fib_route_path_t *paths)
Definition: mfib_table.c:395
mfib_table_walk_fn_t
walk_rc_t(* mfib_table_walk_fn_t)(fib_node_index_t fei, void *ctx)
Call back function when walking entries in a FIB table.
Definition: mfib_table.h:554
index_t
u32 index_t
A Data-Path Object is an object that represents actions that are applied to packets are they are swit...
Definition: dpo.h:43
mfib_table_get_table_id
u32 mfib_table_get_table_id(u32 fib_index, fib_protocol_t proto)
Get the Table-ID of the FIB from protocol and index.
Definition: mfib_table.c:544
mfib_table_get_n_routes
u32 mfib_table_get_n_routes(fib_node_index_t index, fib_protocol_t proto)
To assit UT.
Definition: mfib_table.c:818
fib_node_index_t
u32 fib_node_index_t
A typedef of a node index.
Definition: fib_types.h:29
mfib_table_entry_special_add
fib_node_index_t mfib_table_entry_special_add(u32 fib_index, const mfib_prefix_t *prefix, mfib_source_t source, mfib_entry_flags_t flags, index_t rep_dpo)
Add a 'special' entry to the mFIB that links to the DPO passed A special entry is an entry that the F...
Definition: mfib_table.c:425
mfib_table_entry_paths_update
fib_node_index_t mfib_table_entry_paths_update(u32 fib_index, const mfib_prefix_t *prefix, mfib_source_t source, const fib_route_path_t *rpath)
Definition: mfib_table.c:343
mfib_table_t_::mft_desc
u8 * mft_desc
Table description.
Definition: mfib_table.h:127
format_mfib_table_name
u8 * format_mfib_table_name(u8 *s, va_list *ap)
Format the description/name of the table.
Definition: mfib_table.c:868
mfib_table_walk
void mfib_table_walk(u32 fib_index, fib_protocol_t proto, mfib_table_walk_fn_t fn, void *ctx)
Walk all entries in a FIB table N.B: This is NOT safe to deletes.
Definition: mfib_table.c:829
fib_protocol_t
enum fib_protocol_t_ fib_protocol_t
Protocol Type.
MFIB_TABLE_FLAG_RESYNC
@ MFIB_TABLE_FLAG_RESYNC
Definition: mfib_table.h:62
mfib_table_get_less_specific
fib_node_index_t mfib_table_get_less_specific(u32 fib_index, const mfib_prefix_t *prefix)
Get the less specific (covering) prefix.
Definition: mfib_table.c:129
mfib_table_t_::mft_epoch
u32 mft_epoch
resync epoch
Definition: mfib_table.h:112
mfib_table_attribute_t_
mfib_table_attribute_t_
Flags for the source data.
Definition: mfib_table.h:34
index
u32 index
Definition: flow_types.api:221
mfib_table_t_::mft_proto
fib_protocol_t mft_proto
Which protocol this table serves.
Definition: mfib_table.h:92
mfib_table_find_or_create_and_lock_w_name
u32 mfib_table_find_or_create_and_lock_w_name(fib_protocol_t proto, u32 table_id, mfib_source_t source, const u8 *name)
Get the index of the FIB for a Table-ID.
Definition: mfib_table.c:622
ip4_mfib_t
Definition: ip4.h:52
mfib_table_t_::mft_table_id
u32 mft_table_id
Table ID (hash key) for this FIB.
Definition: mfib_table.h:107
MFIB_TABLE_N_LOCKS
#define MFIB_TABLE_N_LOCKS
Keep a lock per-source and a total.
Definition: mfib_table.h:28
ip.h
u32
unsigned int u32
Definition: types.h:88
mfib_types.h
table_id
u32 table_id
Definition: wireguard.api:102
fib_route_path_t_
A representation of a path as described by a route producer.
Definition: fib_types.h:500
ctx
long ctx[MAX_CONNS]
Definition: main.c:144
ip6_mfib_t
Definition: ip6.h:73
mfib_table_get_index_for_sw_if_index
u32 mfib_table_get_index_for_sw_if_index(fib_protocol_t proto, u32 sw_if_index)
Get the index of the FIB bound to the interface.
Definition: mfib_table.c:527
MFIB_TABLE_ATTRIBUTE_FIRST
@ MFIB_TABLE_ATTRIBUTE_FIRST
Marker.
Definition: mfib_table.h:38
u8
unsigned char u8
Definition: types.h:56
mfib_table_entry_path_remove
void mfib_table_entry_path_remove(u32 fib_index, const mfib_prefix_t *prefix, mfib_source_t source, const fib_route_path_t *paths)
Remove n paths to an entry (aka route) in the FIB.
Definition: mfib_table.c:407
MFIB_TABLE_ATTRIBUTE_RESYNC
@ MFIB_TABLE_ATTRIBUTE_RESYNC
the table is currently resync-ing
Definition: mfib_table.h:42
mfib_table_find
u32 mfib_table_find(fib_protocol_t proto, u32 table_id)
Get the index of the FIB for a Table-ID.
Definition: mfib_table.c:555
proto
vl_api_ip_proto_t proto
Definition: acl_types.api:51
mfib_table_t_::v4
ip4_mfib_t v4
Definition: mfib_table.h:85
mfib_table_mark
void mfib_table_mark(u32 fib_index, fib_protocol_t proto, mfib_source_t source)
Resync all entries from a table for the source this is the mark part of the mark and sweep algorithm.
Definition: mfib_table.c:698
sw_if_index
vl_api_interface_index_t sw_if_index
Definition: wireguard.api:34
mfib_table_get
mfib_table_t * mfib_table_get(fib_node_index_t index, fib_protocol_t proto)
Get a pointer to a FIB table.
Definition: mfib_table.c:30
mfib_table_t_::mft_flags
mfib_table_flags_t mft_flags
table falgs
Definition: mfib_table.h:97
walk_rc_t
enum walk_rc_t_ walk_rc_t
Walk return code.
rpf_id
u32 rpf_id
Definition: fib_types.api:119
prefix
vl_api_prefix_t prefix
Definition: ip.api:146
flags
vl_api_wireguard_peer_flags_t flags
Definition: wireguard.api:105