Line data Source code
1 : /*
2 : * src/vnet/ip/ip_neighboor.c: ip neighbor generic handling
3 : *
4 : * Copyright (c) 2018 Cisco and/or its affiliates.
5 : * Licensed under the Apache License, Version 2.0 (the "License");
6 : * you may not use this file except in compliance with the License.
7 : * You may obtain a copy of the License at:
8 : *
9 : * http://www.apache.org/licenses/LICENSE-2.0
10 : *
11 : * Unless required by applicable law or agreed to in writing, software
12 : * distributed under the License is distributed on an "AS IS" BASIS,
13 : * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 : * See the License for the specific language governing permissions and
15 : * limitations under the License.
16 : */
17 :
18 : #include <vppinfra/llist.h>
19 :
20 : #include <vnet/ip-neighbor/ip_neighbor.h>
21 : #include <vnet/ip-neighbor/ip4_neighbor.h>
22 : #include <vnet/ip-neighbor/ip6_neighbor.h>
23 : #include <vnet/ip-neighbor/ip_neighbor_watch.h>
24 :
25 : #include <vnet/ip/ip6_ll_table.h>
26 : #include <vnet/ip/ip46_address.h>
27 : #include <vnet/fib/fib_table.h>
28 : #include <vnet/adj/adj_mcast.h>
29 :
30 : ip_neighbor_counters_t ip_neighbor_counters[] =
31 : {
32 : [AF_IP4] = {
33 : .ipnc = {
34 : [VLIB_RX] = {
35 : [IP_NEIGHBOR_CTR_REPLY] = {
36 : .name = "arp-rx-replies",
37 : .stat_segment_name = "/net/arp/rx/replies",
38 : },
39 : [IP_NEIGHBOR_CTR_REQUEST] = {
40 : .name = "arp-rx-requests",
41 : .stat_segment_name = "/net/arp/rx/requests",
42 : },
43 : [IP_NEIGHBOR_CTR_GRAT] = {
44 : .name = "arp-rx-gratuitous",
45 : .stat_segment_name = "/net/arp/rx/gratuitous",
46 : },
47 : },
48 : [VLIB_TX] = {
49 : [IP_NEIGHBOR_CTR_REPLY] = {
50 : .name = "arp-tx-replies",
51 : .stat_segment_name = "/net/arp/tx/replies",
52 : },
53 : [IP_NEIGHBOR_CTR_REQUEST] = {
54 : .name = "arp-tx-requests",
55 : .stat_segment_name = "/net/arp/tx/requests",
56 : },
57 : [IP_NEIGHBOR_CTR_GRAT] = {
58 : .name = "arp-tx-gratuitous",
59 : .stat_segment_name = "/net/arp/tx/gratuitous",
60 : },
61 : },
62 : },
63 : },
64 : [AF_IP6] = {
65 : .ipnc = {
66 : [VLIB_RX] = {
67 : [IP_NEIGHBOR_CTR_REPLY] = {
68 : .name = "ip6-nd-rx-replies",
69 : .stat_segment_name = "/net/ip6-nd/rx/replies",
70 : },
71 : [IP_NEIGHBOR_CTR_REQUEST] = {
72 : .name = "ip6-nd-rx-requests",
73 : .stat_segment_name = "/net/ip6-nd/rx/requests",
74 : },
75 : [IP_NEIGHBOR_CTR_GRAT] = {
76 : .name = "ip6-nd-rx-gratuitous",
77 : .stat_segment_name = "/net/ip6-nd/rx/gratuitous",
78 : },
79 : },
80 : [VLIB_TX] = {
81 : [IP_NEIGHBOR_CTR_REPLY] = {
82 : .name = "ip6-nd-tx-replies",
83 : .stat_segment_name = "/net/ip6-nd/tx/replies",
84 : },
85 : [IP_NEIGHBOR_CTR_REQUEST] = {
86 : .name = "ip6-nd-tx-requests",
87 : .stat_segment_name = "/net/ip6-nd/tx/requests",
88 : },
89 : [IP_NEIGHBOR_CTR_GRAT] = {
90 : .name = "ip6-nd-tx-gratuitous",
91 : .stat_segment_name = "/net/ip6-nd/tx/gratuitous",
92 : },
93 : },
94 : },
95 : },
96 : };
97 :
98 : /** Pool for All IP neighbors */
99 : static ip_neighbor_t *ip_neighbor_pool;
100 :
101 : /** protocol specific lists of time sorted neighbors */
102 : index_t ip_neighbor_list_head[N_AF];
103 :
104 : typedef struct ip_neighbor_elt_t_
105 : {
106 : clib_llist_anchor_t ipne_anchor;
107 : index_t ipne_index;
108 : } ip_neighbor_elt_t;
109 :
110 : /** Pool of linked list elemeents */
111 : ip_neighbor_elt_t *ip_neighbor_elt_pool;
112 :
113 : typedef struct ip_neighbor_db_t_
114 : {
115 : /** per interface hash */
116 : uword **ipndb_hash;
117 : /** per-protocol limit - max number of neighbors*/
118 : u32 ipndb_limit;
119 : /** max age of a neighbor before it's forcibly evicted */
120 : u32 ipndb_age;
121 : /** when the limit is reached and new neighbors are created, should
122 : * we recycle an old one */
123 : bool ipndb_recycle;
124 : /** per-protocol number of elements */
125 : u32 ipndb_n_elts;
126 : /** per-protocol number of elements per-fib-index*/
127 : u32 *ipndb_n_elts_per_fib;
128 : } ip_neighbor_db_t;
129 :
130 : static vlib_log_class_t ipn_logger;
131 :
132 : /* DBs of neighbours one per AF */
133 : /* *INDENT-OFF* */
134 : static ip_neighbor_db_t ip_neighbor_db[N_AF] = {
135 : [AF_IP4] = {
136 : .ipndb_limit = 50000,
137 : /* Default to not aging and not recycling */
138 : .ipndb_age = 0,
139 : .ipndb_recycle = false,
140 : },
141 : [AF_IP6] = {
142 : .ipndb_limit = 50000,
143 : /* Default to not aging and not recycling */
144 : .ipndb_age = 0,
145 : .ipndb_recycle = false,
146 : }
147 : };
148 : /* *INDENT-ON* */
149 :
150 : #define IP_NEIGHBOR_DBG(...) \
151 : vlib_log_debug (ipn_logger, __VA_ARGS__);
152 :
153 : #define IP_NEIGHBOR_INFO(...) \
154 : vlib_log_notice (ipn_logger, __VA_ARGS__);
155 :
156 : ip_neighbor_t *
157 327293 : ip_neighbor_get (index_t ipni)
158 : {
159 327293 : if (pool_is_free_index (ip_neighbor_pool, ipni))
160 0 : return (NULL);
161 :
162 327293 : return (pool_elt_at_index (ip_neighbor_pool, ipni));
163 : }
164 :
165 : static index_t
166 63676 : ip_neighbor_get_index (const ip_neighbor_t * ipn)
167 : {
168 63676 : return (ipn - ip_neighbor_pool);
169 : }
170 :
171 : static void
172 9741 : ip_neighbor_touch (ip_neighbor_t * ipn)
173 : {
174 9741 : ipn->ipn_flags &= ~IP_NEIGHBOR_FLAG_STALE;
175 9741 : }
176 :
177 : static bool
178 14155 : ip_neighbor_is_dynamic (const ip_neighbor_t * ipn)
179 : {
180 14155 : return (ipn->ipn_flags & IP_NEIGHBOR_FLAG_DYNAMIC);
181 : }
182 :
183 : const ip_address_t *
184 0 : ip_neighbor_get_ip (const ip_neighbor_t * ipn)
185 : {
186 0 : return (&ipn->ipn_key->ipnk_ip);
187 : }
188 :
189 : ip_address_family_t
190 125648 : ip_neighbor_get_af (const ip_neighbor_t * ipn)
191 : {
192 125648 : return (ip_addr_version (&ipn->ipn_key->ipnk_ip));
193 : }
194 :
195 : const mac_address_t *
196 0 : ip_neighbor_get_mac (const ip_neighbor_t * ipn)
197 : {
198 0 : return (&ipn->ipn_mac);
199 : }
200 :
201 : const u32
202 630 : ip_neighbor_get_sw_if_index (const ip_neighbor_t * ipn)
203 : {
204 630 : return (ipn->ipn_key->ipnk_sw_if_index);
205 : }
206 :
207 : static void
208 5285 : ip_neighbor_list_remove (ip_neighbor_t * ipn)
209 : {
210 : /* new neighbours, are added to the head of the list, since the
211 : * list is time sorted, newest first */
212 : ip_neighbor_elt_t *elt;
213 :
214 5285 : if (~0 != ipn->ipn_elt)
215 : {
216 5210 : elt = pool_elt_at_index (ip_neighbor_elt_pool, ipn->ipn_elt);
217 :
218 5210 : clib_llist_remove (ip_neighbor_elt_pool, ipne_anchor, elt);
219 :
220 5210 : ipn->ipn_elt = ~0;
221 : }
222 5285 : }
223 :
224 : static void
225 9498 : ip_neighbor_refresh (ip_neighbor_t * ipn)
226 : {
227 : /* new neighbours, are added to the head of the list, since the
228 : * list is time sorted, newest first */
229 : ip_neighbor_elt_t *elt, *head;
230 :
231 9498 : ip_neighbor_touch (ipn);
232 9498 : ipn->ipn_time_last_updated = vlib_time_now (vlib_get_main ());
233 9498 : ipn->ipn_n_probes = 0;
234 :
235 9498 : if (ip_neighbor_is_dynamic (ipn))
236 : {
237 9421 : if (~0 == ipn->ipn_elt)
238 : /* first time insertion */
239 9180 : pool_get_zero (ip_neighbor_elt_pool, elt);
240 : else
241 : {
242 : /* already inserted - extract first */
243 241 : elt = pool_elt_at_index (ip_neighbor_elt_pool, ipn->ipn_elt);
244 :
245 241 : clib_llist_remove (ip_neighbor_elt_pool, ipne_anchor, elt);
246 : }
247 9421 : head = pool_elt_at_index (ip_neighbor_elt_pool,
248 : ip_neighbor_list_head[ip_neighbor_get_af
249 : (ipn)]);
250 :
251 9421 : elt->ipne_index = ip_neighbor_get_index (ipn);
252 9421 : clib_llist_add (ip_neighbor_elt_pool, ipne_anchor, elt, head);
253 9421 : ipn->ipn_elt = elt - ip_neighbor_elt_pool;
254 : }
255 9498 : }
256 :
257 : static void
258 9255 : ip_neighbor_db_add (const ip_neighbor_t * ipn)
259 : {
260 : ip_address_family_t af;
261 : u32 sw_if_index;
262 :
263 9255 : af = ip_neighbor_get_af (ipn);
264 9255 : sw_if_index = ipn->ipn_key->ipnk_sw_if_index;
265 :
266 9255 : vec_validate (ip_neighbor_db[af].ipndb_hash, sw_if_index);
267 :
268 9255 : if (!ip_neighbor_db[af].ipndb_hash[sw_if_index])
269 2122 : ip_neighbor_db[af].ipndb_hash[sw_if_index]
270 2122 : = hash_create_mem (0, sizeof (ip_neighbor_key_t), sizeof (index_t));
271 :
272 18510 : hash_set_mem (ip_neighbor_db[af].ipndb_hash[sw_if_index],
273 : ipn->ipn_key, ip_neighbor_get_index (ipn));
274 :
275 9255 : ip_neighbor_db[af].ipndb_n_elts++;
276 9255 : }
277 :
278 : static void
279 5283 : ip_neighbor_db_remove (const ip_neighbor_t * ipn)
280 : {
281 : ip_address_family_t af;
282 : u32 sw_if_index;
283 :
284 5283 : af = ip_neighbor_get_af (ipn);
285 5283 : sw_if_index = ipn->ipn_key->ipnk_sw_if_index;
286 :
287 5283 : vec_validate (ip_neighbor_db[af].ipndb_hash, sw_if_index);
288 :
289 10566 : hash_unset_mem (ip_neighbor_db[af].ipndb_hash[sw_if_index], ipn->ipn_key);
290 :
291 5283 : ip_neighbor_db[af].ipndb_n_elts--;
292 5283 : }
293 :
294 : static ip_neighbor_t *
295 19374 : ip_neighbor_db_find (const ip_neighbor_key_t * key)
296 : {
297 : ip_address_family_t af;
298 : uword *p;
299 :
300 19374 : af = ip_addr_version (&key->ipnk_ip);
301 :
302 19374 : if (key->ipnk_sw_if_index >= vec_len (ip_neighbor_db[af].ipndb_hash))
303 2222 : return NULL;
304 :
305 17152 : p = hash_get_mem (ip_neighbor_db[af].ipndb_hash
306 : [key->ipnk_sw_if_index], key);
307 :
308 17152 : if (p)
309 9879 : return ip_neighbor_get (p[0]);
310 :
311 7273 : return (NULL);
312 : }
313 :
314 : static u8
315 14534 : ip_af_type_pfx_len (ip_address_family_t type)
316 : {
317 14534 : return (type == AF_IP4 ? 32 : 128);
318 : }
319 :
320 : static void
321 9256 : ip_neighbor_adj_fib_add (ip_neighbor_t * ipn, u32 fib_index)
322 : {
323 : ip_address_family_t af;
324 :
325 9256 : af = ip_neighbor_get_af (ipn);
326 :
327 13441 : if (af == AF_IP6 &&
328 4185 : ip6_address_is_link_local_unicast (&ip_addr_v6
329 : (&ipn->ipn_key->ipnk_ip)))
330 3 : {
331 3 : ip6_ll_prefix_t pfx = {
332 3 : .ilp_addr = ip_addr_v6 (&ipn->ipn_key->ipnk_ip),
333 3 : .ilp_sw_if_index = ipn->ipn_key->ipnk_sw_if_index,
334 : };
335 3 : ipn->ipn_fib_entry_index =
336 3 : ip6_ll_table_entry_update (&pfx, FIB_ROUTE_PATH_FLAG_NONE);
337 : }
338 : else
339 : {
340 : fib_protocol_t fproto;
341 :
342 9253 : fproto = ip_address_family_to_fib_proto (af);
343 :
344 18506 : fib_prefix_t pfx = {
345 9253 : .fp_len = ip_af_type_pfx_len (af),
346 : .fp_proto = fproto,
347 9253 : .fp_addr = ip_addr_46 (&ipn->ipn_key->ipnk_ip),
348 : };
349 :
350 9253 : ipn->ipn_fib_entry_index =
351 9253 : fib_table_entry_path_add (fib_index, &pfx, FIB_SOURCE_ADJ,
352 : FIB_ENTRY_FLAG_ATTACHED,
353 9253 : fib_proto_to_dpo (fproto),
354 : &pfx.fp_addr,
355 9253 : ipn->ipn_key->ipnk_sw_if_index,
356 : ~0, 1, NULL, FIB_ROUTE_PATH_FLAG_NONE);
357 :
358 9253 : vec_validate (ip_neighbor_db[af].ipndb_n_elts_per_fib, fib_index);
359 :
360 9253 : ip_neighbor_db[af].ipndb_n_elts_per_fib[fib_index]++;
361 :
362 9253 : if (1 == ip_neighbor_db[af].ipndb_n_elts_per_fib[fib_index])
363 1564 : fib_table_lock (fib_index, fproto, FIB_SOURCE_ADJ);
364 : }
365 9256 : }
366 :
367 : static void
368 5287 : ip_neighbor_adj_fib_remove (ip_neighbor_t * ipn, u32 fib_index)
369 : {
370 : ip_address_family_t af;
371 :
372 5287 : af = ip_neighbor_get_af (ipn);
373 :
374 5287 : if (FIB_NODE_INDEX_INVALID != ipn->ipn_fib_entry_index)
375 : {
376 7697 : if (AF_IP6 == af &&
377 2413 : ip6_address_is_link_local_unicast (&ip_addr_v6
378 : (&ipn->ipn_key->ipnk_ip)))
379 3 : {
380 3 : ip6_ll_prefix_t pfx = {
381 3 : .ilp_addr = ip_addr_v6 (&ipn->ipn_key->ipnk_ip),
382 3 : .ilp_sw_if_index = ipn->ipn_key->ipnk_sw_if_index,
383 : };
384 3 : ip6_ll_table_entry_delete (&pfx);
385 : }
386 : else
387 : {
388 : fib_protocol_t fproto;
389 :
390 5281 : fproto = ip_address_family_to_fib_proto (af);
391 :
392 10562 : fib_prefix_t pfx = {
393 5281 : .fp_len = ip_af_type_pfx_len (af),
394 : .fp_proto = fproto,
395 5281 : .fp_addr = ip_addr_46 (&ipn->ipn_key->ipnk_ip),
396 : };
397 :
398 5281 : fib_table_entry_path_remove (fib_index,
399 : &pfx,
400 : FIB_SOURCE_ADJ,
401 5281 : fib_proto_to_dpo (fproto),
402 : &pfx.fp_addr,
403 5281 : ipn->ipn_key->ipnk_sw_if_index,
404 : ~0, 1, FIB_ROUTE_PATH_FLAG_NONE);
405 :
406 5281 : ip_neighbor_db[af].ipndb_n_elts_per_fib[fib_index]--;
407 :
408 5281 : if (0 == ip_neighbor_db[af].ipndb_n_elts_per_fib[fib_index])
409 1414 : fib_table_unlock (fib_index, fproto, FIB_SOURCE_ADJ);
410 : }
411 : }
412 5287 : }
413 :
414 : static void
415 19256 : ip_neighbor_mk_complete (adj_index_t ai, ip_neighbor_t * ipn)
416 : {
417 19256 : adj_nbr_update_rewrite (ai, ADJ_NBR_REWRITE_FLAG_COMPLETE,
418 : ethernet_build_rewrite (vnet_get_main (),
419 19256 : ipn->
420 : ipn_key->ipnk_sw_if_index,
421 19256 : adj_get_link_type (ai),
422 19256 : ipn->ipn_mac.bytes));
423 19256 : }
424 :
425 : static void
426 5305 : ip_neighbor_mk_incomplete (adj_index_t ai)
427 : {
428 5305 : ip_adjacency_t *adj = adj_get (ai);
429 :
430 5305 : adj_nbr_update_rewrite (ai,
431 : ADJ_NBR_REWRITE_FLAG_INCOMPLETE,
432 : ethernet_build_rewrite (vnet_get_main (),
433 : adj->
434 : rewrite_header.sw_if_index,
435 : VNET_LINK_ARP,
436 : VNET_REWRITE_FOR_SW_INTERFACE_ADDRESS_BROADCAST));
437 5305 : }
438 :
439 : static adj_walk_rc_t
440 19005 : ip_neighbor_mk_complete_walk (adj_index_t ai, void *ctx)
441 : {
442 19005 : ip_neighbor_t *ipn = ctx;
443 :
444 19005 : ip_neighbor_mk_complete (ai, ipn);
445 :
446 19005 : return (ADJ_WALK_RC_CONTINUE);
447 : }
448 :
449 : static adj_walk_rc_t
450 5305 : ip_neighbor_mk_incomplete_walk (adj_index_t ai, void *ctx)
451 : {
452 5305 : ip_neighbor_mk_incomplete (ai);
453 :
454 5305 : return (ADJ_WALK_RC_CONTINUE);
455 : }
456 :
457 : static void
458 5283 : ip_neighbor_destroy (ip_neighbor_t * ipn)
459 : {
460 : ip_address_family_t af;
461 :
462 5283 : af = ip_neighbor_get_af (ipn);
463 :
464 5283 : IP_NEIGHBOR_DBG ("free: %U", format_ip_neighbor,
465 : ip_neighbor_get_index (ipn));
466 :
467 5283 : ip_neighbor_publish (ip_neighbor_get_index (ipn),
468 : IP_NEIGHBOR_EVENT_REMOVED);
469 :
470 5283 : adj_nbr_walk_nh (ipn->ipn_key->ipnk_sw_if_index,
471 5283 : ip_address_family_to_fib_proto (af),
472 5283 : &ip_addr_46 (&ipn->ipn_key->ipnk_ip),
473 : ip_neighbor_mk_incomplete_walk, ipn);
474 5283 : ip_neighbor_adj_fib_remove
475 : (ipn,
476 : fib_table_get_index_for_sw_if_index
477 5283 : (ip_address_family_to_fib_proto (af), ipn->ipn_key->ipnk_sw_if_index));
478 :
479 5283 : ip_neighbor_list_remove (ipn);
480 5283 : ip_neighbor_db_remove (ipn);
481 5283 : clib_mem_free (ipn->ipn_key);
482 :
483 5283 : pool_put (ip_neighbor_pool, ipn);
484 5283 : }
485 :
486 : static bool
487 2 : ip_neighbor_force_reuse (ip_address_family_t af)
488 : {
489 2 : if (!ip_neighbor_db[af].ipndb_recycle)
490 1 : return false;
491 :
492 : /* pluck the oldest entry, which is the one from the end of the list */
493 : ip_neighbor_elt_t *elt, *head;
494 :
495 1 : head = pool_elt_at_index (ip_neighbor_elt_pool, ip_neighbor_list_head[af]);
496 :
497 1 : if (clib_llist_is_empty (ip_neighbor_elt_pool, ipne_anchor, head))
498 0 : return (false);
499 :
500 1 : elt = clib_llist_prev (ip_neighbor_elt_pool, ipne_anchor, head);
501 1 : ip_neighbor_destroy (ip_neighbor_get (elt->ipne_index));
502 :
503 1 : return (true);
504 : }
505 :
506 : static ip_neighbor_t *
507 9256 : ip_neighbor_alloc (const ip_neighbor_key_t * key,
508 : const mac_address_t * mac, ip_neighbor_flags_t flags)
509 : {
510 : ip_address_family_t af;
511 : ip_neighbor_t *ipn;
512 :
513 9256 : af = ip_addr_version (&key->ipnk_ip);
514 :
515 9256 : if (ip_neighbor_db[af].ipndb_limit &&
516 9256 : (ip_neighbor_db[af].ipndb_n_elts >= ip_neighbor_db[af].ipndb_limit))
517 : {
518 2 : if (!ip_neighbor_force_reuse (af))
519 1 : return (NULL);
520 : }
521 :
522 9255 : pool_get_zero (ip_neighbor_pool, ipn);
523 :
524 9255 : ipn->ipn_key = clib_mem_alloc (sizeof (*ipn->ipn_key));
525 9255 : clib_memcpy (ipn->ipn_key, key, sizeof (*ipn->ipn_key));
526 :
527 9255 : ipn->ipn_fib_entry_index = FIB_NODE_INDEX_INVALID;
528 9255 : ipn->ipn_flags = flags;
529 9255 : ipn->ipn_elt = ~0;
530 :
531 9255 : mac_address_copy (&ipn->ipn_mac, mac);
532 :
533 9255 : ip_neighbor_db_add (ipn);
534 :
535 : /* create the adj-fib. the entry in the FIB table for the peer's interface */
536 9255 : if (!(ipn->ipn_flags & IP_NEIGHBOR_FLAG_NO_FIB_ENTRY))
537 9252 : ip_neighbor_adj_fib_add
538 : (ipn, fib_table_get_index_for_sw_if_index
539 9252 : (ip_address_family_to_fib_proto (af), ipn->ipn_key->ipnk_sw_if_index));
540 :
541 9255 : return (ipn);
542 : }
543 :
544 : int
545 9499 : ip_neighbor_add (const ip_address_t * ip,
546 : const mac_address_t * mac,
547 : u32 sw_if_index,
548 : ip_neighbor_flags_t flags, u32 * stats_index)
549 : {
550 : fib_protocol_t fproto;
551 : ip_neighbor_t *ipn;
552 :
553 : /* main thread only */
554 9499 : ASSERT (0 == vlib_get_thread_index ());
555 :
556 9499 : fproto = ip_address_family_to_fib_proto (ip_addr_version (ip));
557 :
558 9499 : const ip_neighbor_key_t key = {
559 : .ipnk_ip = *ip,
560 : .ipnk_sw_if_index = sw_if_index,
561 : };
562 :
563 9499 : ipn = ip_neighbor_db_find (&key);
564 :
565 9499 : if (ipn)
566 : {
567 243 : IP_NEIGHBOR_DBG ("update: %U, %U",
568 : format_vnet_sw_if_index_name, vnet_get_main (),
569 : sw_if_index, format_ip_address, ip,
570 : format_ip_neighbor_flags, flags, format_mac_address_t,
571 : mac);
572 :
573 243 : ip_neighbor_touch (ipn);
574 :
575 : /* Refuse to over-write static neighbor entry. */
576 243 : if (!(flags & IP_NEIGHBOR_FLAG_STATIC) &&
577 241 : (ipn->ipn_flags & IP_NEIGHBOR_FLAG_STATIC))
578 : {
579 : /* if MAC address match, still check to send event */
580 0 : if (0 == mac_address_cmp (&ipn->ipn_mac, mac))
581 0 : goto check_customers;
582 0 : return -2;
583 : }
584 :
585 : /* A dynamic entry can become static, but not vice-versa.
586 : * i.e. since if it was programmed by the CP then it must
587 : * be removed by the CP */
588 243 : if ((flags & IP_NEIGHBOR_FLAG_STATIC) &&
589 2 : !(ipn->ipn_flags & IP_NEIGHBOR_FLAG_STATIC))
590 : {
591 2 : ip_neighbor_list_remove (ipn);
592 2 : ipn->ipn_flags |= IP_NEIGHBOR_FLAG_STATIC;
593 2 : ipn->ipn_flags &= ~IP_NEIGHBOR_FLAG_DYNAMIC;
594 : }
595 :
596 : /*
597 : * prevent a DoS attack from the data-plane that
598 : * spams us with no-op updates to the MAC address
599 : */
600 243 : if (0 == mac_address_cmp (&ipn->ipn_mac, mac))
601 : {
602 240 : ip_neighbor_refresh (ipn);
603 240 : goto check_customers;
604 : }
605 :
606 3 : mac_address_copy (&ipn->ipn_mac, mac);
607 : }
608 : else
609 : {
610 9256 : IP_NEIGHBOR_INFO ("add: %U, %U",
611 : format_vnet_sw_if_index_name, vnet_get_main (),
612 : sw_if_index, format_ip_address, ip,
613 : format_ip_neighbor_flags, flags, format_mac_address_t,
614 : mac);
615 :
616 9256 : ipn = ip_neighbor_alloc (&key, mac, flags);
617 :
618 9256 : if (NULL == ipn)
619 1 : return VNET_API_ERROR_LIMIT_EXCEEDED;
620 : }
621 :
622 : /* Update time stamp and flags. */
623 9258 : ip_neighbor_refresh (ipn);
624 :
625 9258 : adj_nbr_walk_nh (ipn->ipn_key->ipnk_sw_if_index,
626 9258 : fproto, &ip_addr_46 (&ipn->ipn_key->ipnk_ip),
627 : ip_neighbor_mk_complete_walk, ipn);
628 :
629 9498 : check_customers:
630 : /* Customer(s) requesting event for this address? */
631 9498 : ip_neighbor_publish (ip_neighbor_get_index (ipn), IP_NEIGHBOR_EVENT_ADDED);
632 :
633 9498 : if (stats_index)
634 5823 : *stats_index = adj_nbr_find (fproto,
635 5823 : fib_proto_to_link (fproto),
636 5823 : &ip_addr_46 (&ipn->ipn_key->ipnk_ip),
637 5823 : ipn->ipn_key->ipnk_sw_if_index);
638 9498 : return 0;
639 : }
640 :
641 : int
642 103 : ip_neighbor_del (const ip_address_t * ip, u32 sw_if_index)
643 : {
644 : ip_neighbor_t *ipn;
645 :
646 : /* main thread only */
647 103 : ASSERT (0 == vlib_get_thread_index ());
648 :
649 103 : IP_NEIGHBOR_INFO ("delete: %U, %U",
650 : format_vnet_sw_if_index_name, vnet_get_main (),
651 : sw_if_index, format_ip_address, ip);
652 :
653 103 : const ip_neighbor_key_t key = {
654 : .ipnk_ip = *ip,
655 : .ipnk_sw_if_index = sw_if_index,
656 : };
657 :
658 103 : ipn = ip_neighbor_db_find (&key);
659 :
660 103 : if (NULL == ipn)
661 0 : return (VNET_API_ERROR_NO_SUCH_ENTRY);
662 :
663 103 : ip_neighbor_destroy (ipn);
664 :
665 103 : return (0);
666 : }
667 :
668 : typedef struct ip_neighbor_del_all_ctx_t_
669 : {
670 : index_t *ipn_del;
671 : } ip_neighbor_del_all_ctx_t;
672 :
673 : static walk_rc_t
674 131 : ip_neighbor_del_all_walk_cb (index_t ipni, void *arg)
675 : {
676 131 : ip_neighbor_del_all_ctx_t *ctx = arg;
677 :
678 131 : vec_add1 (ctx->ipn_del, ipni);
679 :
680 131 : return (WALK_CONTINUE);
681 : }
682 :
683 : void
684 9 : ip_neighbor_del_all (ip_address_family_t af, u32 sw_if_index)
685 : {
686 9 : IP_NEIGHBOR_INFO ("delete-all: %U, %U",
687 : format_ip_address_family, af,
688 : format_vnet_sw_if_index_name, vnet_get_main (),
689 : sw_if_index);
690 :
691 9 : ip_neighbor_del_all_ctx_t ctx = {
692 : .ipn_del = NULL,
693 : };
694 : index_t *ipni;
695 :
696 9 : ip_neighbor_walk (af, sw_if_index, ip_neighbor_del_all_walk_cb, &ctx);
697 :
698 140 : vec_foreach (ipni,
699 131 : ctx.ipn_del) ip_neighbor_destroy (ip_neighbor_get (*ipni));
700 9 : vec_free (ctx.ipn_del);
701 9 : }
702 :
703 : void
704 9772 : ip_neighbor_update (vnet_main_t * vnm, adj_index_t ai)
705 : {
706 : ip_neighbor_t *ipn;
707 : ip_adjacency_t *adj;
708 :
709 9772 : adj = adj_get (ai);
710 :
711 9772 : ip_neighbor_key_t key = {
712 9772 : .ipnk_sw_if_index = adj->rewrite_header.sw_if_index,
713 : };
714 :
715 9772 : ip_address_from_46 (&adj->sub_type.nbr.next_hop,
716 9772 : adj->ia_nh_proto, &key.ipnk_ip);
717 :
718 9772 : ipn = ip_neighbor_db_find (&key);
719 :
720 9772 : switch (adj->lookup_next_index)
721 : {
722 9521 : case IP_LOOKUP_NEXT_ARP:
723 9521 : if (NULL != ipn)
724 : {
725 9282 : adj_nbr_walk_nh (adj->rewrite_header.sw_if_index,
726 9282 : adj->ia_nh_proto,
727 9282 : &adj->sub_type.nbr.next_hop,
728 : ip_neighbor_mk_complete_walk, ipn);
729 : }
730 : else
731 : {
732 : /*
733 : * no matching ARP entry.
734 : * construct the rewrite required to for an ARP packet, and stick
735 : * that in the adj's pipe to smoke.
736 : */
737 239 : adj_nbr_update_rewrite
738 : (ai,
739 : ADJ_NBR_REWRITE_FLAG_INCOMPLETE,
740 : ethernet_build_rewrite
741 : (vnm,
742 : adj->rewrite_header.sw_if_index,
743 : VNET_LINK_ARP,
744 : VNET_REWRITE_FOR_SW_INTERFACE_ADDRESS_BROADCAST));
745 :
746 : /*
747 : * since the FIB has added this adj for a route, it makes sense it
748 : * may want to forward traffic sometime soon. Let's send a
749 : * speculative ARP. just one. If we were to do periodically that
750 : * wouldn't be bad either, but that's more code than i'm prepared to
751 : * write at this time for relatively little reward.
752 : */
753 : /*
754 : * adj_nbr_update_rewrite may actually call fib_walk_sync.
755 : * fib_walk_sync may allocate a new adjacency and potentially cause
756 : * a realloc for adj_pool. When that happens, adj pointer is no
757 : * longer valid here.x We refresh adj pointer accordingly.
758 : */
759 239 : adj = adj_get (ai);
760 239 : ip_neighbor_probe (adj);
761 : }
762 9521 : break;
763 251 : case IP_LOOKUP_NEXT_REWRITE:
764 : /* Update of an existing rewrite adjacency happens e.g. when the
765 : * interface's MAC address changes */
766 251 : if (NULL != ipn)
767 251 : ip_neighbor_mk_complete (ai, ipn);
768 251 : break;
769 0 : case IP_LOOKUP_NEXT_GLEAN:
770 : case IP_LOOKUP_NEXT_BCAST:
771 : case IP_LOOKUP_NEXT_MCAST:
772 : case IP_LOOKUP_NEXT_DROP:
773 : case IP_LOOKUP_NEXT_PUNT:
774 : case IP_LOOKUP_NEXT_LOCAL:
775 : case IP_LOOKUP_NEXT_MCAST_MIDCHAIN:
776 : case IP_LOOKUP_NEXT_MIDCHAIN:
777 : case IP_LOOKUP_NEXT_ICMP_ERROR:
778 : case IP_LOOKUP_N_NEXT:
779 0 : ASSERT (0);
780 0 : break;
781 : }
782 9772 : }
783 :
784 : void
785 3671 : ip_neighbor_learn (const ip_neighbor_learn_t * l)
786 : {
787 3671 : ip_neighbor_add (&l->ip, &l->mac, l->sw_if_index,
788 : IP_NEIGHBOR_FLAG_DYNAMIC, NULL);
789 3671 : }
790 :
791 : static clib_error_t *
792 4 : ip_neighbor_cmd (vlib_main_t * vm,
793 : unformat_input_t * input, vlib_cli_command_t * cmd)
794 : {
795 4 : ip_address_t ip = IP_ADDRESS_V6_ALL_0S;
796 4 : mac_address_t mac = ZERO_MAC_ADDRESS;
797 4 : vnet_main_t *vnm = vnet_get_main ();
798 : ip_neighbor_flags_t flags;
799 4 : u32 sw_if_index = ~0;
800 4 : int is_add = 1;
801 4 : int count = 1;
802 :
803 4 : flags = IP_NEIGHBOR_FLAG_DYNAMIC;
804 :
805 10 : while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
806 : {
807 : /* set ip arp TenGigE1/1/0/1 1.2.3.4 aa:bb:... or aabb.ccdd... */
808 6 : if (unformat (input, "%U %U %U",
809 : unformat_vnet_sw_interface, vnm, &sw_if_index,
810 : unformat_ip_address, &ip, unformat_mac_address_t, &mac))
811 : ;
812 2 : else if (unformat (input, "delete") || unformat (input, "del"))
813 0 : is_add = 0;
814 2 : else if (unformat (input, "static"))
815 : {
816 2 : flags |= IP_NEIGHBOR_FLAG_STATIC;
817 2 : flags &= ~IP_NEIGHBOR_FLAG_DYNAMIC;
818 : }
819 0 : else if (unformat (input, "no-fib-entry"))
820 0 : flags |= IP_NEIGHBOR_FLAG_NO_FIB_ENTRY;
821 0 : else if (unformat (input, "count %d", &count))
822 : ;
823 : else
824 0 : break;
825 : }
826 :
827 8 : if (sw_if_index == ~0 ||
828 8 : ip_address_is_zero (&ip) || mac_address_is_zero (&mac))
829 0 : return clib_error_return (0,
830 : "specify interface, IP address and MAC: `%U'",
831 : format_unformat_error, input);
832 :
833 8 : while (count)
834 : {
835 4 : if (is_add)
836 4 : ip_neighbor_add (&ip, &mac, sw_if_index, flags, NULL);
837 : else
838 0 : ip_neighbor_del (&ip, sw_if_index);
839 :
840 4 : ip_address_increment (&ip);
841 4 : mac_address_increment (&mac);
842 :
843 4 : --count;
844 : }
845 :
846 4 : return NULL;
847 : }
848 :
849 : /* *INDENT-OFF* */
850 : /*?
851 : * Add or delete IPv4 ARP cache entries.
852 : *
853 : * @note 'set ip neighbor' options (e.g. delete, static,
854 : * 'count <number>', 'interface ip4_addr mac_addr') can be added in
855 : * any order and combination.
856 : *
857 : * @cliexpar
858 : * @parblock
859 : * Add or delete IPv4 ARP cache entries as follows. MAC Address can be in
860 : * either aa:bb:cc:dd:ee:ff format or aabb.ccdd.eeff format.
861 : * @cliexcmd{set ip neighbor GigabitEthernet2/0/0 6.0.0.3 dead.beef.babe}
862 : * @cliexcmd{set ip neighbor delete GigabitEthernet2/0/0 6.0.0.3
863 : * de:ad:be:ef:ba:be}
864 : *
865 : * To add or delete an IPv4 ARP cache entry
866 : * table:
867 : * @cliexcmd{set ip neighbor GigabitEthernet2/0/0 6.0.0.3 dead.beef.babe}
868 : * @cliexcmd{set ip neighbor delete GigabitEthernet2/0/0 6.0.0.3
869 : * dead.beef.babe}
870 : *
871 : * Add or delete IPv4 static ARP cache entries as follows:
872 : * @cliexcmd{set ip neighbor static GigabitEthernet2/0/0 6.0.0.3
873 : * dead.beef.babe}
874 : * @cliexcmd{set ip neighbor static delete GigabitEthernet2/0/0 6.0.0.3
875 : * dead.beef.babe}
876 : *
877 : * For testing / debugging purposes, the 'set ip neighbor' command can add or
878 : * delete multiple entries. Supply the 'count N' parameter:
879 : * @cliexcmd{set ip neighbor count 10 GigabitEthernet2/0/0 6.0.0.3
880 : * dead.beef.babe}
881 : * @endparblock
882 : ?*/
883 272887 : VLIB_CLI_COMMAND (ip_neighbor_command, static) = {
884 : .path = "set ip neighbor",
885 : .short_help = "set ip neighbor [del] <intfc> <ip-address> <mac-address> "
886 : "[static] [no-fib-entry] [count <count>]",
887 : .function = ip_neighbor_cmd,
888 : };
889 272887 : VLIB_CLI_COMMAND (ip_neighbor_command2, static) = {
890 : .path = "ip neighbor",
891 : .short_help = "ip neighbor [del] <intfc> <ip-address> <mac-address> "
892 : "[static] [no-fib-entry] [count <count>]",
893 : .function = ip_neighbor_cmd,
894 : };
895 : /* *INDENT-ON* */
896 :
897 : static int
898 132429 : ip_neighbor_sort (void *a1, void *a2)
899 : {
900 132429 : index_t *ipni1 = a1, *ipni2 = a2;
901 : ip_neighbor_t *ipn1, *ipn2;
902 : int cmp;
903 :
904 132429 : ipn1 = ip_neighbor_get (*ipni1);
905 132429 : ipn2 = ip_neighbor_get (*ipni2);
906 :
907 132429 : cmp = vnet_sw_interface_compare (vnet_get_main (),
908 132429 : ipn1->ipn_key->ipnk_sw_if_index,
909 132429 : ipn2->ipn_key->ipnk_sw_if_index);
910 132429 : if (!cmp)
911 117802 : cmp = ip_address_cmp (&ipn1->ipn_key->ipnk_ip, &ipn2->ipn_key->ipnk_ip);
912 132429 : return cmp;
913 : }
914 :
915 : static index_t *
916 145 : ip_neighbor_entries (u32 sw_if_index, ip_address_family_t af)
917 : {
918 145 : index_t *ipnis = NULL;
919 : ip_neighbor_t *ipn;
920 :
921 : /* *INDENT-OFF* */
922 23270 : pool_foreach (ipn, ip_neighbor_pool)
923 : {
924 23125 : if ((sw_if_index == ~0 ||
925 23125 : ipn->ipn_key->ipnk_sw_if_index == sw_if_index) &&
926 1579 : (N_AF == af ||
927 1579 : ip_neighbor_get_af(ipn) == af))
928 23020 : vec_add1 (ipnis, ip_neighbor_get_index(ipn));
929 : }
930 :
931 : /* *INDENT-ON* */
932 :
933 145 : if (ipnis)
934 127 : vec_sort_with_function (ipnis, ip_neighbor_sort);
935 145 : return ipnis;
936 : }
937 :
938 : static clib_error_t *
939 1 : ip_neighbor_show_sorted_i (vlib_main_t * vm,
940 : unformat_input_t * input,
941 : vlib_cli_command_t * cmd, ip_address_family_t af)
942 : {
943 : ip_neighbor_elt_t *elt, *head;
944 :
945 1 : head = pool_elt_at_index (ip_neighbor_elt_pool, ip_neighbor_list_head[af]);
946 :
947 :
948 1 : vlib_cli_output (vm, "%=12s%=40s%=6s%=20s%=24s", "Time", "IP",
949 : "Flags", "Ethernet", "Interface");
950 :
951 : /* *INDENT-OFF*/
952 : /* the list is time sorted, newest first, so start from the back
953 : * and work forwards. Stop when we get to one that is alive */
954 201 : clib_llist_foreach_reverse(ip_neighbor_elt_pool,
955 : ipne_anchor, head, elt,
956 : ({
957 : vlib_cli_output (vm, "%U", format_ip_neighbor, elt->ipne_index);
958 : }));
959 : /* *INDENT-ON*/
960 :
961 1 : return (NULL);
962 : }
963 :
964 : static clib_error_t *
965 145 : ip_neighbor_show_i (vlib_main_t * vm,
966 : unformat_input_t * input,
967 : vlib_cli_command_t * cmd, ip_address_family_t af)
968 : {
969 145 : index_t *ipni, *ipnis = NULL;
970 : u32 sw_if_index;
971 :
972 : /* Filter entries by interface if given. */
973 145 : sw_if_index = ~0;
974 145 : (void) unformat_user (input, unformat_vnet_sw_interface, vnet_get_main (),
975 : &sw_if_index);
976 :
977 145 : ipnis = ip_neighbor_entries (sw_if_index, af);
978 :
979 145 : if (ipnis)
980 127 : vlib_cli_output (vm, "%=12s%=40s%=6s%=20s%=24s", "Time", "IP",
981 : "Flags", "Ethernet", "Interface");
982 :
983 23165 : vec_foreach (ipni, ipnis)
984 : {
985 23020 : vlib_cli_output (vm, "%U", format_ip_neighbor, *ipni);
986 : }
987 145 : vec_free (ipnis);
988 :
989 145 : return (NULL);
990 : }
991 :
992 : static clib_error_t *
993 60 : ip_neighbor_show (vlib_main_t * vm,
994 : unformat_input_t * input, vlib_cli_command_t * cmd)
995 : {
996 60 : return (ip_neighbor_show_i (vm, input, cmd, N_AF));
997 : }
998 :
999 : static clib_error_t *
1000 61 : ip6_neighbor_show (vlib_main_t * vm,
1001 : unformat_input_t * input, vlib_cli_command_t * cmd)
1002 : {
1003 61 : return (ip_neighbor_show_i (vm, input, cmd, AF_IP6));
1004 : }
1005 :
1006 : static clib_error_t *
1007 24 : ip4_neighbor_show (vlib_main_t * vm,
1008 : unformat_input_t * input, vlib_cli_command_t * cmd)
1009 : {
1010 24 : return (ip_neighbor_show_i (vm, input, cmd, AF_IP4));
1011 : }
1012 :
1013 : static clib_error_t *
1014 0 : ip6_neighbor_show_sorted (vlib_main_t * vm,
1015 : unformat_input_t * input, vlib_cli_command_t * cmd)
1016 : {
1017 0 : return (ip_neighbor_show_sorted_i (vm, input, cmd, AF_IP6));
1018 : }
1019 :
1020 : static clib_error_t *
1021 1 : ip4_neighbor_show_sorted (vlib_main_t * vm,
1022 : unformat_input_t * input, vlib_cli_command_t * cmd)
1023 : {
1024 1 : return (ip_neighbor_show_sorted_i (vm, input, cmd, AF_IP4));
1025 : }
1026 :
1027 : /*?
1028 : * Display all the IP neighbor entries.
1029 : *
1030 : * @cliexpar
1031 : * Example of how to display the IPv4 ARP table:
1032 : * @cliexstart{show ip neighbor}
1033 : * Time FIB IP4 Flags Ethernet Interface
1034 : * 346.3028 0 6.1.1.3 de:ad:be:ef:ba:be GigabitEthernet2/0/0
1035 : * 3077.4271 0 6.1.1.4 S de:ad:be:ef:ff:ff GigabitEthernet2/0/0
1036 : * 2998.6409 1 6.2.2.3 de:ad:be:ef:00:01 GigabitEthernet2/0/0
1037 : * Proxy arps enabled for:
1038 : * Fib_index 0 6.0.0.1 - 6.0.0.11
1039 : * @cliexend
1040 : ?*/
1041 : /* *INDENT-OFF* */
1042 272887 : VLIB_CLI_COMMAND (show_ip_neighbors_cmd_node, static) = {
1043 : .path = "show ip neighbors",
1044 : .function = ip_neighbor_show,
1045 : .short_help = "show ip neighbors [interface]",
1046 : };
1047 272887 : VLIB_CLI_COMMAND (show_ip4_neighbors_cmd_node, static) = {
1048 : .path = "show ip4 neighbors",
1049 : .function = ip4_neighbor_show,
1050 : .short_help = "show ip4 neighbors [interface]",
1051 : };
1052 272887 : VLIB_CLI_COMMAND (show_ip6_neighbors_cmd_node, static) = {
1053 : .path = "show ip6 neighbors",
1054 : .function = ip6_neighbor_show,
1055 : .short_help = "show ip6 neighbors [interface]",
1056 : };
1057 272887 : VLIB_CLI_COMMAND (show_ip_neighbor_cmd_node, static) = {
1058 : .path = "show ip neighbor",
1059 : .function = ip_neighbor_show,
1060 : .short_help = "show ip neighbor [interface]",
1061 : };
1062 272887 : VLIB_CLI_COMMAND (show_ip4_neighbor_cmd_node, static) = {
1063 : .path = "show ip4 neighbor",
1064 : .function = ip4_neighbor_show,
1065 : .short_help = "show ip4 neighbor [interface]",
1066 : };
1067 272887 : VLIB_CLI_COMMAND (show_ip6_neighbor_cmd_node, static) = {
1068 : .path = "show ip6 neighbor",
1069 : .function = ip6_neighbor_show,
1070 : .short_help = "show ip6 neighbor [interface]",
1071 : };
1072 272887 : VLIB_CLI_COMMAND (show_ip4_neighbor_sorted_cmd_node, static) = {
1073 : .path = "show ip4 neighbor-sorted",
1074 : .function = ip4_neighbor_show_sorted,
1075 : .short_help = "show ip4 neighbor-sorted",
1076 : };
1077 272887 : VLIB_CLI_COMMAND (show_ip6_neighbor_sorted_cmd_node, static) = {
1078 : .path = "show ip6 neighbor-sorted",
1079 : .function = ip6_neighbor_show_sorted,
1080 : .short_help = "show ip6 neighbor-sorted",
1081 : };
1082 : /* *INDENT-ON* */
1083 :
1084 : static ip_neighbor_vft_t ip_nbr_vfts[N_AF];
1085 :
1086 : void
1087 1118 : ip_neighbor_register (ip_address_family_t af, const ip_neighbor_vft_t * vft)
1088 : {
1089 1118 : ip_nbr_vfts[af] = *vft;
1090 1118 : }
1091 :
1092 : void
1093 869 : ip_neighbor_probe_dst (u32 sw_if_index, u32 thread_index,
1094 : ip_address_family_t af, const ip46_address_t *dst)
1095 : {
1096 869 : if (!vnet_sw_interface_is_admin_up (vnet_get_main (), sw_if_index))
1097 26 : return;
1098 :
1099 843 : switch (af)
1100 : {
1101 44 : case AF_IP6:
1102 44 : ip6_neighbor_probe_dst (sw_if_index, thread_index, &dst->ip6);
1103 44 : break;
1104 799 : case AF_IP4:
1105 799 : ip4_neighbor_probe_dst (sw_if_index, thread_index, &dst->ip4);
1106 799 : break;
1107 : }
1108 : }
1109 :
1110 : void
1111 239 : ip_neighbor_probe (const ip_adjacency_t * adj)
1112 : {
1113 239 : ip_neighbor_probe_dst (adj->rewrite_header.sw_if_index,
1114 239 : vlib_get_thread_index (),
1115 239 : ip_address_family_from_fib_proto (adj->ia_nh_proto),
1116 : &adj->sub_type.nbr.next_hop);
1117 239 : }
1118 :
1119 : void
1120 6754 : ip_neighbor_walk (ip_address_family_t af,
1121 : u32 sw_if_index, ip_neighbor_walk_cb_t cb, void *ctx)
1122 : {
1123 : ip_neighbor_key_t *key;
1124 : index_t ipni;
1125 :
1126 6754 : if (~0 == sw_if_index)
1127 : {
1128 : uword **hash;
1129 :
1130 70 : vec_foreach (hash, ip_neighbor_db[af].ipndb_hash)
1131 : {
1132 : /* *INDENT-OFF* */
1133 3450 : hash_foreach (key, ipni, *hash,
1134 : ({
1135 : if (WALK_STOP == cb (ipni, ctx))
1136 : break;
1137 : }));
1138 : /* *INDENT-ON* */
1139 : }
1140 : }
1141 : else
1142 : {
1143 : uword *hash;
1144 :
1145 6740 : if (vec_len (ip_neighbor_db[af].ipndb_hash) <= sw_if_index)
1146 1004 : return;
1147 5736 : hash = ip_neighbor_db[af].ipndb_hash[sw_if_index];
1148 :
1149 : /* *INDENT-OFF* */
1150 391406 : hash_foreach (key, ipni, hash,
1151 : ({
1152 : if (WALK_STOP == cb (ipni, ctx))
1153 : break;
1154 : }));
1155 : /* *INDENT-ON* */
1156 : }
1157 : }
1158 :
1159 : int
1160 0 : ip4_neighbor_proxy_add (u32 fib_index,
1161 : const ip4_address_t * start,
1162 : const ip4_address_t * end)
1163 : {
1164 0 : if (ip_nbr_vfts[AF_IP4].inv_proxy4_add)
1165 : {
1166 0 : return (ip_nbr_vfts[AF_IP4].inv_proxy4_add (fib_index, start, end));
1167 : }
1168 :
1169 0 : return (-1);
1170 : }
1171 :
1172 : int
1173 0 : ip4_neighbor_proxy_delete (u32 fib_index,
1174 : const ip4_address_t * start,
1175 : const ip4_address_t * end)
1176 : {
1177 0 : if (ip_nbr_vfts[AF_IP4].inv_proxy4_del)
1178 : {
1179 0 : return (ip_nbr_vfts[AF_IP4].inv_proxy4_del (fib_index, start, end));
1180 : }
1181 0 : return -1;
1182 : }
1183 :
1184 : int
1185 0 : ip4_neighbor_proxy_enable (u32 sw_if_index)
1186 : {
1187 0 : if (ip_nbr_vfts[AF_IP4].inv_proxy4_enable)
1188 : {
1189 0 : return (ip_nbr_vfts[AF_IP4].inv_proxy4_enable (sw_if_index));
1190 : }
1191 0 : return -1;
1192 : }
1193 :
1194 : int
1195 0 : ip4_neighbor_proxy_disable (u32 sw_if_index)
1196 : {
1197 0 : if (ip_nbr_vfts[AF_IP4].inv_proxy4_disable)
1198 : {
1199 0 : return (ip_nbr_vfts[AF_IP4].inv_proxy4_disable (sw_if_index));
1200 : }
1201 0 : return -1;
1202 : }
1203 :
1204 : int
1205 0 : ip6_neighbor_proxy_add (u32 sw_if_index, const ip6_address_t * addr)
1206 : {
1207 0 : if (ip_nbr_vfts[AF_IP6].inv_proxy6_add)
1208 : {
1209 0 : return (ip_nbr_vfts[AF_IP6].inv_proxy6_add (sw_if_index, addr));
1210 : }
1211 0 : return -1;
1212 : }
1213 :
1214 : int
1215 0 : ip6_neighbor_proxy_del (u32 sw_if_index, const ip6_address_t * addr)
1216 : {
1217 0 : if (ip_nbr_vfts[AF_IP6].inv_proxy6_del)
1218 : {
1219 0 : return (ip_nbr_vfts[AF_IP6].inv_proxy6_del (sw_if_index, addr));
1220 : }
1221 0 : return -1;
1222 : }
1223 :
1224 : void
1225 13782 : ip_neighbor_populate (ip_address_family_t af, u32 sw_if_index)
1226 : {
1227 13782 : index_t *ipnis = NULL, *ipni;
1228 : ip_neighbor_t *ipn;
1229 :
1230 13782 : IP_NEIGHBOR_DBG ("populate: %U %U",
1231 : format_vnet_sw_if_index_name, vnet_get_main (),
1232 : sw_if_index, format_ip_address_family, af);
1233 :
1234 : /* *INDENT-OFF* */
1235 43228 : pool_foreach (ipn, ip_neighbor_pool)
1236 : {
1237 29446 : if (ip_neighbor_get_af(ipn) == af &&
1238 14723 : ipn->ipn_key->ipnk_sw_if_index == sw_if_index)
1239 404 : vec_add1 (ipnis, ipn - ip_neighbor_pool);
1240 : }
1241 : /* *INDENT-ON* */
1242 :
1243 14186 : vec_foreach (ipni, ipnis)
1244 : {
1245 404 : ipn = ip_neighbor_get (*ipni);
1246 :
1247 404 : adj_nbr_walk_nh (ipn->ipn_key->ipnk_sw_if_index,
1248 404 : ip_address_family_to_fib_proto (ip_neighbor_get_af
1249 : (ipn)),
1250 404 : &ip_addr_46 (&ipn->ipn_key->ipnk_ip),
1251 : ip_neighbor_mk_complete_walk, ipn);
1252 : }
1253 13782 : vec_free (ipnis);
1254 13782 : }
1255 :
1256 : void
1257 21112 : ip_neighbor_flush (ip_address_family_t af, u32 sw_if_index)
1258 : {
1259 21112 : index_t *ipnis = NULL, *ipni;
1260 : ip_neighbor_t *ipn;
1261 :
1262 :
1263 21112 : IP_NEIGHBOR_DBG ("flush: %U %U",
1264 : format_vnet_sw_if_index_name, vnet_get_main (),
1265 : sw_if_index, format_ip_address_family, af);
1266 :
1267 : /* *INDENT-OFF* */
1268 70695 : pool_foreach (ipn, ip_neighbor_pool)
1269 : {
1270 49583 : if (ip_neighbor_get_af(ipn) == af &&
1271 28291 : ipn->ipn_key->ipnk_sw_if_index == sw_if_index &&
1272 2736 : ip_neighbor_is_dynamic (ipn))
1273 2730 : vec_add1 (ipnis, ipn - ip_neighbor_pool);
1274 : }
1275 : /* *INDENT-ON* */
1276 :
1277 23842 : vec_foreach (ipni, ipnis) ip_neighbor_destroy (ip_neighbor_get (*ipni));
1278 21112 : vec_free (ipnis);
1279 21112 : }
1280 :
1281 : walk_rc_t
1282 256 : ip_neighbor_mark_one (index_t ipni, void *ctx)
1283 : {
1284 : ip_neighbor_t *ipn;
1285 :
1286 256 : ipn = ip_neighbor_get (ipni);
1287 :
1288 256 : ipn->ipn_flags |= IP_NEIGHBOR_FLAG_STALE;
1289 :
1290 256 : return (WALK_CONTINUE);
1291 : }
1292 :
1293 : void
1294 4 : ip_neighbor_mark (ip_address_family_t af)
1295 : {
1296 4 : ip_neighbor_walk (af, ~0, ip_neighbor_mark_one, NULL);
1297 4 : }
1298 :
1299 : typedef struct ip_neighbor_sweep_ctx_t_
1300 : {
1301 : index_t *ipnsc_stale;
1302 : } ip_neighbor_sweep_ctx_t;
1303 :
1304 : static walk_rc_t
1305 256 : ip_neighbor_sweep_one (index_t ipni, void *arg)
1306 : {
1307 256 : ip_neighbor_sweep_ctx_t *ctx = arg;
1308 : ip_neighbor_t *ipn;
1309 :
1310 256 : ipn = ip_neighbor_get (ipni);
1311 :
1312 256 : if (ipn->ipn_flags & IP_NEIGHBOR_FLAG_STALE)
1313 : {
1314 192 : vec_add1 (ctx->ipnsc_stale, ipni);
1315 : }
1316 :
1317 256 : return (WALK_CONTINUE);
1318 : }
1319 :
1320 : void
1321 4 : ip_neighbor_sweep (ip_address_family_t af)
1322 : {
1323 4 : ip_neighbor_sweep_ctx_t ctx = { };
1324 : index_t *ipni;
1325 :
1326 4 : ip_neighbor_walk (af, ~0, ip_neighbor_sweep_one, &ctx);
1327 :
1328 196 : vec_foreach (ipni, ctx.ipnsc_stale)
1329 : {
1330 192 : ip_neighbor_destroy (ip_neighbor_get (*ipni));
1331 : }
1332 4 : vec_free (ctx.ipnsc_stale);
1333 4 : }
1334 :
1335 : /*
1336 : * Remove any arp entries associated with the specified interface
1337 : */
1338 : static clib_error_t *
1339 13268 : ip_neighbor_interface_admin_change (vnet_main_t * vnm,
1340 : u32 sw_if_index, u32 flags)
1341 : {
1342 : ip_address_family_t af;
1343 :
1344 13268 : IP_NEIGHBOR_DBG ("interface-admin: %U %s",
1345 : format_vnet_sw_if_index_name, vnet_get_main (),
1346 : sw_if_index,
1347 : (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP ? "up" : "down"));
1348 :
1349 13268 : if (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
1350 : {
1351 20673 : FOR_EACH_IP_ADDRESS_FAMILY (af) ip_neighbor_populate (af, sw_if_index);
1352 : }
1353 : else
1354 : {
1355 : /* admin down, flush all neighbours */
1356 19131 : FOR_EACH_IP_ADDRESS_FAMILY (af) ip_neighbor_flush (af, sw_if_index);
1357 : }
1358 :
1359 13268 : return (NULL);
1360 : }
1361 :
1362 2801 : VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION (ip_neighbor_interface_admin_change);
1363 :
1364 : /*
1365 : * Remove any arp entries associated with the specified interface
1366 : */
1367 : static clib_error_t *
1368 11597 : ip_neighbor_add_del_sw_interface (vnet_main_t *vnm, u32 sw_if_index,
1369 : u32 is_add)
1370 : {
1371 11597 : IP_NEIGHBOR_DBG ("interface-change: %U %s",
1372 : format_vnet_sw_if_index_name, vnet_get_main (),
1373 : sw_if_index, (is_add ? "add" : "del"));
1374 :
1375 11597 : if (!is_add && sw_if_index != ~0)
1376 : {
1377 : ip_address_family_t af;
1378 :
1379 12537 : FOR_EACH_IP_ADDRESS_FAMILY (af) ip_neighbor_flush (af, sw_if_index);
1380 : }
1381 :
1382 11597 : if (is_add)
1383 : {
1384 7418 : ip_neighbor_alloc_ctr (&ip_neighbor_counters[AF_IP4], sw_if_index);
1385 7418 : ip_neighbor_alloc_ctr (&ip_neighbor_counters[AF_IP6], sw_if_index);
1386 : }
1387 :
1388 11597 : return (NULL);
1389 : }
1390 :
1391 3363 : VNET_SW_INTERFACE_ADD_DEL_FUNCTION (ip_neighbor_add_del_sw_interface);
1392 :
1393 : typedef struct ip_neighbor_walk_covered_ctx_t_
1394 : {
1395 : ip_address_t addr;
1396 : u32 length;
1397 : index_t *ipnis;
1398 : } ip_neighbor_walk_covered_ctx_t;
1399 :
1400 : static walk_rc_t
1401 1933 : ip_neighbor_walk_covered (index_t ipni, void *arg)
1402 : {
1403 1933 : ip_neighbor_walk_covered_ctx_t *ctx = arg;
1404 : ip_neighbor_t *ipn;
1405 :
1406 1933 : ipn = ip_neighbor_get (ipni);
1407 :
1408 1933 : if (AF_IP4 == ip_addr_version (&ctx->addr))
1409 : {
1410 919 : if (ip4_destination_matches_route (&ip4_main,
1411 919 : &ip_addr_v4 (&ipn->ipn_key->ipnk_ip),
1412 919 : &ip_addr_v4 (&ctx->addr),
1413 1832 : ctx->length) &&
1414 913 : ip_neighbor_is_dynamic (ipn))
1415 : {
1416 908 : vec_add1 (ctx->ipnis, ip_neighbor_get_index (ipn));
1417 : }
1418 : }
1419 1014 : else if (AF_IP6 == ip_addr_version (&ctx->addr))
1420 : {
1421 1014 : if (ip6_destination_matches_route (&ip6_main,
1422 1014 : &ip_addr_v6 (&ipn->ipn_key->ipnk_ip),
1423 1014 : &ip_addr_v6 (&ctx->addr),
1424 2022 : ctx->length) &&
1425 1008 : ip_neighbor_is_dynamic (ipn))
1426 : {
1427 1008 : vec_add1 (ctx->ipnis, ip_neighbor_get_index (ipn));
1428 : }
1429 : }
1430 1933 : return (WALK_CONTINUE);
1431 : }
1432 :
1433 :
1434 : /*
1435 : * callback when an interface address is added or deleted
1436 : */
1437 : static void
1438 4699 : ip_neighbor_add_del_interface_address_v4 (ip4_main_t * im,
1439 : uword opaque,
1440 : u32 sw_if_index,
1441 : ip4_address_t * address,
1442 : u32 address_length,
1443 : u32 if_address_index, u32 is_del)
1444 : {
1445 : /*
1446 : * Flush the ARP cache of all entries covered by the address
1447 : * that is being removed.
1448 : */
1449 4699 : IP_NEIGHBOR_DBG ("addr-%s: %U, %U/%d", (is_del ? "del" : "add"),
1450 : format_vnet_sw_if_index_name, vnet_get_main (), sw_if_index,
1451 : format_ip4_address, address, address_length);
1452 :
1453 4699 : if (is_del)
1454 : {
1455 : /* *INDENT-OFF* */
1456 2223 : ip_neighbor_walk_covered_ctx_t ctx = {
1457 : .addr = {
1458 : .ip.ip4 = *address,
1459 : .version = AF_IP4,
1460 : },
1461 : .length = address_length,
1462 : };
1463 : /* *INDENT-ON* */
1464 : index_t *ipni;
1465 :
1466 2223 : ip_neighbor_walk (AF_IP4, sw_if_index, ip_neighbor_walk_covered, &ctx);
1467 :
1468 3131 : vec_foreach (ipni, ctx.ipnis)
1469 908 : ip_neighbor_destroy (ip_neighbor_get (*ipni));
1470 :
1471 2223 : vec_free (ctx.ipnis);
1472 : }
1473 4699 : }
1474 :
1475 : /*
1476 : * callback when an interface address is added or deleted
1477 : */
1478 : static void
1479 3979 : ip_neighbor_add_del_interface_address_v6 (ip6_main_t * im,
1480 : uword opaque,
1481 : u32 sw_if_index,
1482 : ip6_address_t * address,
1483 : u32 address_length,
1484 : u32 if_address_index, u32 is_del)
1485 : {
1486 : /*
1487 : * Flush the ARP cache of all entries covered by the address
1488 : * that is being removed.
1489 : */
1490 3979 : IP_NEIGHBOR_DBG ("addr-change: %U, %U/%d %s",
1491 : format_vnet_sw_if_index_name, vnet_get_main (),
1492 : sw_if_index, format_ip6_address, address, address_length,
1493 : (is_del ? "del" : "add"));
1494 :
1495 3979 : if (is_del)
1496 : {
1497 : /* *INDENT-OFF* */
1498 1905 : ip_neighbor_walk_covered_ctx_t ctx = {
1499 : .addr = {
1500 : .ip.ip6 = *address,
1501 : .version = AF_IP6,
1502 : },
1503 : .length = address_length,
1504 : };
1505 : /* *INDENT-ON* */
1506 : index_t *ipni;
1507 :
1508 1905 : ip_neighbor_walk (AF_IP6, sw_if_index, ip_neighbor_walk_covered, &ctx);
1509 :
1510 2913 : vec_foreach (ipni, ctx.ipnis)
1511 1008 : ip_neighbor_destroy (ip_neighbor_get (*ipni));
1512 :
1513 1905 : vec_free (ctx.ipnis);
1514 : }
1515 3979 : }
1516 :
1517 : typedef struct ip_neighbor_table_bind_ctx_t_
1518 : {
1519 : u32 new_fib_index;
1520 : u32 old_fib_index;
1521 : } ip_neighbor_table_bind_ctx_t;
1522 :
1523 : static walk_rc_t
1524 4 : ip_neighbor_walk_table_bind (index_t ipni, void *arg)
1525 : {
1526 4 : ip_neighbor_table_bind_ctx_t *ctx = arg;
1527 : ip_neighbor_t *ipn;
1528 :
1529 4 : ipn = ip_neighbor_get (ipni);
1530 4 : ip_neighbor_adj_fib_remove (ipn, ctx->old_fib_index);
1531 4 : ip_neighbor_adj_fib_add (ipn, ctx->new_fib_index);
1532 :
1533 4 : return (WALK_CONTINUE);
1534 : }
1535 :
1536 : static void
1537 896 : ip_neighbor_table_bind_v4 (ip4_main_t * im,
1538 : uword opaque,
1539 : u32 sw_if_index,
1540 : u32 new_fib_index, u32 old_fib_index)
1541 : {
1542 896 : ip_neighbor_table_bind_ctx_t ctx = {
1543 : .old_fib_index = old_fib_index,
1544 : .new_fib_index = new_fib_index,
1545 : };
1546 :
1547 896 : ip_neighbor_walk (AF_IP4, sw_if_index, ip_neighbor_walk_table_bind, &ctx);
1548 896 : }
1549 :
1550 : static void
1551 729 : ip_neighbor_table_bind_v6 (ip6_main_t * im,
1552 : uword opaque,
1553 : u32 sw_if_index,
1554 : u32 new_fib_index, u32 old_fib_index)
1555 : {
1556 729 : ip_neighbor_table_bind_ctx_t ctx = {
1557 : .old_fib_index = old_fib_index,
1558 : .new_fib_index = new_fib_index,
1559 : };
1560 :
1561 729 : ip_neighbor_walk (AF_IP6, sw_if_index, ip_neighbor_walk_table_bind, &ctx);
1562 729 : }
1563 :
1564 : typedef enum ip_neighbor_age_state_t_
1565 : {
1566 : IP_NEIGHBOR_AGE_ALIVE,
1567 : IP_NEIGHBOR_AGE_PROBE,
1568 : IP_NEIGHBOR_AGE_DEAD,
1569 : } ip_neighbor_age_state_t;
1570 :
1571 : #define IP_NEIGHBOR_PROCESS_SLEEP_LONG (0)
1572 :
1573 : static ip_neighbor_age_state_t
1574 851 : ip_neighbour_age_out (index_t ipni, f64 now, f64 * wait)
1575 : {
1576 : ip_address_family_t af;
1577 : ip_neighbor_t *ipn;
1578 : u32 ipndb_age;
1579 : u32 ttl;
1580 :
1581 851 : ipn = ip_neighbor_get (ipni);
1582 851 : af = ip_neighbor_get_af (ipn);
1583 851 : ipndb_age = ip_neighbor_db[af].ipndb_age;
1584 851 : ttl = now - ipn->ipn_time_last_updated;
1585 851 : *wait = ipndb_age;
1586 :
1587 851 : if (ttl > ipndb_age)
1588 : {
1589 840 : IP_NEIGHBOR_DBG ("aged: %U @%f - %f > %d",
1590 : format_ip_neighbor, ipni, now,
1591 : ipn->ipn_time_last_updated, ipndb_age);
1592 840 : if (ipn->ipn_n_probes > 2)
1593 : {
1594 : /* 3 strikes and yea-re out */
1595 210 : IP_NEIGHBOR_DBG ("dead: %U", format_ip_neighbor, ipni);
1596 210 : *wait = 1;
1597 210 : return (IP_NEIGHBOR_AGE_DEAD);
1598 : }
1599 : else
1600 : {
1601 630 : ip_neighbor_probe_dst (ip_neighbor_get_sw_if_index (ipn),
1602 630 : vlib_get_thread_index (), af,
1603 630 : &ip_addr_46 (&ipn->ipn_key->ipnk_ip));
1604 :
1605 630 : ipn->ipn_n_probes++;
1606 630 : *wait = 1;
1607 : }
1608 : }
1609 : else
1610 : {
1611 : /* here we are sure that ttl <= ipndb_age */
1612 11 : *wait = ipndb_age - ttl + 1;
1613 11 : return (IP_NEIGHBOR_AGE_ALIVE);
1614 : }
1615 :
1616 630 : return (IP_NEIGHBOR_AGE_PROBE);
1617 : }
1618 :
1619 : typedef enum ip_neighbor_process_event_t_
1620 : {
1621 : IP_NEIGHBOR_AGE_PROCESS_WAKEUP,
1622 : } ip_neighbor_process_event_t;
1623 :
1624 : static uword
1625 1118 : ip_neighbor_age_loop (vlib_main_t * vm,
1626 : vlib_node_runtime_t * rt,
1627 : vlib_frame_t * f, ip_address_family_t af)
1628 : {
1629 1118 : uword event_type, *event_data = NULL;
1630 : f64 timeout;
1631 :
1632 : /* Set the timeout to an effectively infinite value when the process starts */
1633 1118 : timeout = IP_NEIGHBOR_PROCESS_SLEEP_LONG;
1634 :
1635 : while (1)
1636 15 : {
1637 : f64 now;
1638 :
1639 1133 : if (!timeout)
1640 1121 : vlib_process_wait_for_event (vm);
1641 : else
1642 12 : vlib_process_wait_for_event_or_clock (vm, timeout);
1643 :
1644 15 : event_type = vlib_process_get_events (vm, &event_data);
1645 15 : vec_reset_length (event_data);
1646 :
1647 15 : now = vlib_time_now (vm);
1648 :
1649 15 : switch (event_type)
1650 : {
1651 10 : case ~0:
1652 : {
1653 : /* timer expired */
1654 : ip_neighbor_elt_t *elt, *head;
1655 : f64 wait;
1656 :
1657 10 : timeout = ip_neighbor_db[af].ipndb_age;
1658 10 : head = pool_elt_at_index (ip_neighbor_elt_pool,
1659 : ip_neighbor_list_head[af]);
1660 :
1661 : /* *INDENT-OFF*/
1662 : /* the list is time sorted, newest first, so start from the back
1663 : * and work forwards. Stop when we get to one that is alive */
1664 220 : restart:
1665 860 : clib_llist_foreach_reverse(ip_neighbor_elt_pool,
1666 : ipne_anchor, head, elt,
1667 : ({
1668 : ip_neighbor_age_state_t res;
1669 :
1670 : res = ip_neighbour_age_out(elt->ipne_index, now, &wait);
1671 :
1672 : if (IP_NEIGHBOR_AGE_ALIVE == res) {
1673 : /* the oldest neighbor has not yet expired, go back to sleep */
1674 : timeout = clib_min (wait, timeout);
1675 : break;
1676 : }
1677 : else if (IP_NEIGHBOR_AGE_DEAD == res) {
1678 : /* the oldest neighbor is dead, pop it, then restart the walk
1679 : * again from the back */
1680 : ip_neighbor_destroy (ip_neighbor_get(elt->ipne_index));
1681 : goto restart;
1682 : }
1683 :
1684 : timeout = clib_min (wait, timeout);
1685 : }));
1686 : /* *INDENT-ON* */
1687 10 : break;
1688 : }
1689 5 : case IP_NEIGHBOR_AGE_PROCESS_WAKEUP:
1690 : {
1691 :
1692 5 : if (!ip_neighbor_db[af].ipndb_age)
1693 : {
1694 : /* aging has been disabled */
1695 3 : timeout = 0;
1696 3 : break;
1697 : }
1698 : ip_neighbor_elt_t *elt, *head;
1699 :
1700 2 : head = pool_elt_at_index (ip_neighbor_elt_pool,
1701 : ip_neighbor_list_head[af]);
1702 : /* no neighbors yet */
1703 2 : if (clib_llist_is_empty (ip_neighbor_elt_pool, ipne_anchor, head))
1704 : {
1705 1 : timeout = ip_neighbor_db[af].ipndb_age;
1706 1 : break;
1707 : }
1708 :
1709 : /* poke the oldset neighbour for aging, which returns how long we sleep for */
1710 1 : elt = clib_llist_prev (ip_neighbor_elt_pool, ipne_anchor, head);
1711 1 : ip_neighbour_age_out (elt->ipne_index, now, &timeout);
1712 1 : break;
1713 : }
1714 : }
1715 15 : }
1716 : return 0;
1717 : }
1718 :
1719 : static uword
1720 559 : ip4_neighbor_age_process (vlib_main_t * vm,
1721 : vlib_node_runtime_t * rt, vlib_frame_t * f)
1722 : {
1723 559 : return (ip_neighbor_age_loop (vm, rt, f, AF_IP4));
1724 : }
1725 :
1726 : static uword
1727 559 : ip6_neighbor_age_process (vlib_main_t * vm,
1728 : vlib_node_runtime_t * rt, vlib_frame_t * f)
1729 : {
1730 559 : return (ip_neighbor_age_loop (vm, rt, f, AF_IP6));
1731 : }
1732 :
1733 : /* *INDENT-OFF* */
1734 178120 : VLIB_REGISTER_NODE (ip4_neighbor_age_process_node,static) = {
1735 : .function = ip4_neighbor_age_process,
1736 : .type = VLIB_NODE_TYPE_PROCESS,
1737 : .name = "ip4-neighbor-age-process",
1738 : };
1739 178120 : VLIB_REGISTER_NODE (ip6_neighbor_age_process_node,static) = {
1740 : .function = ip6_neighbor_age_process,
1741 : .type = VLIB_NODE_TYPE_PROCESS,
1742 : .name = "ip6-neighbor-age-process",
1743 : };
1744 : /* *INDENT-ON* */
1745 :
1746 : int
1747 5 : ip_neighbor_config (ip_address_family_t af, u32 limit, u32 age, bool recycle)
1748 : {
1749 5 : ip_neighbor_db[af].ipndb_limit = limit;
1750 5 : ip_neighbor_db[af].ipndb_recycle = recycle;
1751 5 : ip_neighbor_db[af].ipndb_age = age;
1752 :
1753 10 : vlib_process_signal_event (vlib_get_main (),
1754 : (AF_IP4 == af ?
1755 5 : ip4_neighbor_age_process_node.index :
1756 0 : ip6_neighbor_age_process_node.index),
1757 : IP_NEIGHBOR_AGE_PROCESS_WAKEUP, 0);
1758 :
1759 5 : return (0);
1760 : }
1761 :
1762 : int
1763 6 : ip_neighbor_get_config (ip_address_family_t af, u32 *limit, u32 *age,
1764 : bool *recycle)
1765 : {
1766 6 : *limit = ip_neighbor_db[af].ipndb_limit;
1767 6 : *age = ip_neighbor_db[af].ipndb_age;
1768 6 : *recycle = ip_neighbor_db[af].ipndb_recycle;
1769 :
1770 6 : return (0);
1771 : }
1772 :
1773 : static clib_error_t *
1774 1 : ip_neighbor_config_show (vlib_main_t * vm,
1775 : unformat_input_t * input, vlib_cli_command_t * cmd)
1776 : {
1777 : ip_address_family_t af;
1778 :
1779 : /* *INDENT-OFF* */
1780 3 : FOR_EACH_IP_ADDRESS_FAMILY(af) {
1781 2 : vlib_cli_output (vm, "%U:", format_ip_address_family, af);
1782 2 : vlib_cli_output (vm, " limit:%d, age:%d, recycle:%d",
1783 : ip_neighbor_db[af].ipndb_limit,
1784 : ip_neighbor_db[af].ipndb_age,
1785 2 : ip_neighbor_db[af].ipndb_recycle);
1786 : }
1787 :
1788 : /* *INDENT-ON* */
1789 1 : return (NULL);
1790 : }
1791 :
1792 : static clib_error_t *
1793 0 : ip_neighbor_config_set (vlib_main_t *vm, unformat_input_t *input,
1794 : vlib_cli_command_t *cmd)
1795 : {
1796 0 : unformat_input_t _line_input, *line_input = &_line_input;
1797 0 : clib_error_t *error = NULL;
1798 : ip_address_family_t af;
1799 : u32 limit, age;
1800 : bool recycle;
1801 :
1802 0 : if (!unformat_user (input, unformat_line_input, line_input))
1803 0 : return 0;
1804 :
1805 0 : if (!unformat (line_input, "%U", unformat_ip_address_family, &af))
1806 : {
1807 0 : error = unformat_parse_error (line_input);
1808 0 : goto done;
1809 : }
1810 :
1811 0 : limit = ip_neighbor_db[af].ipndb_limit;
1812 0 : age = ip_neighbor_db[af].ipndb_age;
1813 0 : recycle = ip_neighbor_db[af].ipndb_recycle;
1814 :
1815 0 : while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
1816 : {
1817 0 : if (unformat (line_input, "limit %u", &limit))
1818 : ;
1819 0 : else if (unformat (line_input, "age %u", &age))
1820 : ;
1821 0 : else if (unformat (line_input, "recycle"))
1822 0 : recycle = true;
1823 0 : else if (unformat (line_input, "norecycle"))
1824 0 : recycle = false;
1825 : else
1826 : {
1827 0 : error = unformat_parse_error (line_input);
1828 0 : goto done;
1829 : }
1830 : }
1831 :
1832 0 : ip_neighbor_config (af, limit, age, recycle);
1833 :
1834 0 : done:
1835 0 : unformat_free (line_input);
1836 0 : return error;
1837 : }
1838 :
1839 : static void
1840 7 : ip_neighbor_stats_show_one (vlib_main_t *vm, vnet_main_t *vnm, u32 sw_if_index)
1841 : {
1842 7 : vlib_cli_output (vm, " %U", format_vnet_sw_if_index_name, vnm, sw_if_index);
1843 7 : vlib_cli_output (vm, " arp:%U", format_ip_neighbor_counters,
1844 : &ip_neighbor_counters[AF_IP4], sw_if_index);
1845 7 : vlib_cli_output (vm, " nd: %U", format_ip_neighbor_counters,
1846 : &ip_neighbor_counters[AF_IP6], sw_if_index);
1847 7 : }
1848 :
1849 : static walk_rc_t
1850 5 : ip_neighbor_stats_show_cb (vnet_main_t *vnm, vnet_sw_interface_t *si,
1851 : void *ctx)
1852 : {
1853 5 : ip_neighbor_stats_show_one (ctx, vnm, si->sw_if_index);
1854 :
1855 5 : return (WALK_CONTINUE);
1856 : }
1857 :
1858 : static clib_error_t *
1859 3 : ip_neighbor_stats_show (vlib_main_t *vm, unformat_input_t *input,
1860 : vlib_cli_command_t *cmd)
1861 : {
1862 : vnet_main_t *vnm;
1863 : u32 sw_if_index;
1864 :
1865 3 : vnm = vnet_get_main ();
1866 3 : sw_if_index = ~0;
1867 3 : (void) unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index);
1868 :
1869 3 : if (~0 == sw_if_index)
1870 : {
1871 1 : vnet_sw_interface_walk (vnm, ip_neighbor_stats_show_cb, vm);
1872 : }
1873 : else
1874 : {
1875 2 : ip_neighbor_stats_show_one (vm, vnm, sw_if_index);
1876 : }
1877 3 : return (NULL);
1878 : }
1879 :
1880 : /* *INDENT-OFF* */
1881 272887 : VLIB_CLI_COMMAND (show_ip_neighbor_cfg_cmd_node, static) = {
1882 : .path = "show ip neighbor-config",
1883 : .function = ip_neighbor_config_show,
1884 : .short_help = "show ip neighbor-config",
1885 : };
1886 272887 : VLIB_CLI_COMMAND (set_ip_neighbor_cfg_cmd_node, static) = {
1887 : .path = "set ip neighbor-config",
1888 : .function = ip_neighbor_config_set,
1889 : .short_help = "set ip neighbor-config ip4|ip6 [limit <limit>] [age <age>] "
1890 : "[recycle|norecycle]",
1891 : };
1892 272887 : VLIB_CLI_COMMAND (show_ip_neighbor_stats_cmd_node, static) = {
1893 : .path = "show ip neighbor-stats",
1894 : .function = ip_neighbor_stats_show,
1895 : .short_help = "show ip neighbor-stats [interface]",
1896 : };
1897 : /* *INDENT-ON* */
1898 :
1899 : static clib_error_t *
1900 559 : ip_neighbor_init (vlib_main_t * vm)
1901 : {
1902 : {
1903 559 : ip4_add_del_interface_address_callback_t cb = {
1904 : .function = ip_neighbor_add_del_interface_address_v4,
1905 : };
1906 559 : vec_add1 (ip4_main.add_del_interface_address_callbacks, cb);
1907 : }
1908 : {
1909 559 : ip6_add_del_interface_address_callback_t cb = {
1910 : .function = ip_neighbor_add_del_interface_address_v6,
1911 : };
1912 559 : vec_add1 (ip6_main.add_del_interface_address_callbacks, cb);
1913 : }
1914 : {
1915 559 : ip4_table_bind_callback_t cb = {
1916 : .function = ip_neighbor_table_bind_v4,
1917 : };
1918 559 : vec_add1 (ip4_main.table_bind_callbacks, cb);
1919 : }
1920 : {
1921 559 : ip6_table_bind_callback_t cb = {
1922 : .function = ip_neighbor_table_bind_v6,
1923 : };
1924 559 : vec_add1 (ip6_main.table_bind_callbacks, cb);
1925 : }
1926 559 : ipn_logger = vlib_log_register_class ("ip", "neighbor");
1927 :
1928 : ip_address_family_t af;
1929 :
1930 1677 : FOR_EACH_IP_ADDRESS_FAMILY (af)
1931 1118 : ip_neighbor_list_head[af] =
1932 1118 : clib_llist_make_head (ip_neighbor_elt_pool, ipne_anchor);
1933 :
1934 559 : return (NULL);
1935 : }
1936 :
1937 : /* *INDENT-OFF* */
1938 47039 : VLIB_INIT_FUNCTION (ip_neighbor_init) =
1939 : {
1940 : .runs_after = VLIB_INITS("ip_main_init"),
1941 : };
1942 : /* *INDENT-ON* */
1943 :
1944 : /*
1945 : * fd.io coding-style-patch-verification: ON
1946 : *
1947 : * Local Variables:
1948 : * eval: (c-set-style "gnu")
1949 : * End:
1950 : */
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