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 #include <vnet/adj/adj_nbr.h>
17 #include <vnet/adj/adj_internal.h>
18 #include <vnet/ethernet/arp_packet.h>
19 #include <vnet/fib/fib_walk.h>
22 * Vector Hash tables of neighbour (traditional) adjacencies
23 * Key: interface(for the vector index), address (and its proto),
24 * link-type/ether-type.
26 static uword **adj_nbr_tables[FIB_PROTOCOL_IP_MAX];
28 typedef struct adj_nbr_key_t_
30 ip46_address_t ank_ip;
34 #define ADJ_NBR_SET_KEY(_key, _lt, _nh) \
36 ip46_address_copy(&(_key).ank_ip, (_nh)); \
37 _key.ank_linkt = (_lt); \
40 #define ADJ_NBR_ITF_OK(_proto, _itf) \
41 (((_itf) < vec_len(adj_nbr_tables[_proto])) && \
42 (NULL != adj_nbr_tables[_proto][(_itf)]))
44 #define ADJ_NBR_ASSERT_NH_PROTO(nh_proto, err) \
46 ASSERT (nh_proto < FIB_PROTOCOL_IP_MAX); \
47 const fib_protocol_t nh_proto__ = (nh_proto); \
48 if (nh_proto__ >= FIB_PROTOCOL_IP_MAX) \
50 clib_warning ("BUG: protocol %d > %d\n", \
52 FIB_PROTOCOL_IP_MAX); \
58 adj_nbr_insert (fib_protocol_t nh_proto,
59 vnet_link_t link_type,
60 const ip46_address_t *nh_addr,
62 adj_index_t adj_index)
66 ADJ_NBR_ASSERT_NH_PROTO (nh_proto,);
68 if (sw_if_index >= vec_len(adj_nbr_tables[nh_proto]))
70 vec_validate(adj_nbr_tables[nh_proto], sw_if_index);
72 if (NULL == adj_nbr_tables[nh_proto][sw_if_index])
74 adj_nbr_tables[nh_proto][sw_if_index] =
75 hash_create_mem(0, sizeof(adj_nbr_key_t), sizeof(adj_index_t));
78 ADJ_NBR_SET_KEY(kv, link_type, nh_addr);
80 hash_set_mem_alloc (&adj_nbr_tables[nh_proto][sw_if_index],
85 adj_nbr_remove (adj_index_t ai,
86 fib_protocol_t nh_proto,
87 vnet_link_t link_type,
88 const ip46_address_t *nh_addr,
93 ADJ_NBR_ASSERT_NH_PROTO (nh_proto,);
95 if (!ADJ_NBR_ITF_OK(nh_proto, sw_if_index))
98 ADJ_NBR_SET_KEY(kv, link_type, nh_addr);
100 hash_unset_mem_free(&adj_nbr_tables[nh_proto][sw_if_index], &kv);
102 if (0 == hash_elts(adj_nbr_tables[nh_proto][sw_if_index]))
104 hash_free(adj_nbr_tables[nh_proto][sw_if_index]);
109 adj_nbr_find (fib_protocol_t nh_proto,
110 vnet_link_t link_type,
111 const ip46_address_t *nh_addr,
117 ADJ_NBR_ASSERT_NH_PROTO (nh_proto, ADJ_INDEX_INVALID);
119 ADJ_NBR_SET_KEY(kv, link_type, nh_addr);
121 if (!ADJ_NBR_ITF_OK(nh_proto, sw_if_index))
122 return (ADJ_INDEX_INVALID);
124 p = hash_get_mem(adj_nbr_tables[nh_proto][sw_if_index], &kv);
130 return (ADJ_INDEX_INVALID);
134 adj_get_nd_node (fib_protocol_t proto)
137 case FIB_PROTOCOL_IP4:
138 return (ip4_arp_node.index);
139 case FIB_PROTOCOL_IP6:
140 return (ip6_discover_neighbor_node.index);
141 case FIB_PROTOCOL_MPLS:
145 return (ip4_arp_node.index);
149 * @brief Check and set feature flags if o/p interface has any o/p features.
152 adj_nbr_evaluate_feature (adj_index_t ai)
155 vnet_feature_main_t *fm = &feature_main;
162 switch (adj->ia_link)
165 arc_index = ip4_main.lookup_main.output_feature_arc_index;
168 arc_index = ip6_main.lookup_main.output_feature_arc_index;
171 arc_index = mpls_main.output_feature_arc_index;
177 sw_if_index = adj->rewrite_header.sw_if_index;
178 if (vec_len(fm->feature_count_by_sw_if_index[arc_index]) > sw_if_index)
180 feature_count = fm->feature_count_by_sw_if_index[arc_index][sw_if_index];
181 if (feature_count > 0)
183 vnet_feature_config_main_t *cm;
185 adj->rewrite_header.flags |= VNET_REWRITE_HAS_FEATURES;
186 cm = &fm->feature_config_mains[arc_index];
188 adj->ia_cfg_index = vec_elt (cm->config_index_by_sw_if_index,
195 static ip_adjacency_t*
196 adj_nbr_alloc (fib_protocol_t nh_proto,
197 vnet_link_t link_type,
198 const ip46_address_t *nh_addr,
203 adj = adj_alloc(nh_proto);
205 adj_nbr_insert(nh_proto, link_type, nh_addr,
210 * since we just added the ADJ we have no rewrite string for it,
213 adj->lookup_next_index = IP_LOOKUP_NEXT_ARP;
214 adj->sub_type.nbr.next_hop = *nh_addr;
215 adj->ia_link = link_type;
216 adj->ia_nh_proto = nh_proto;
217 adj->rewrite_header.sw_if_index = sw_if_index;
218 vnet_rewrite_update_mtu(vnet_get_main(), adj->ia_link,
219 &adj->rewrite_header);
221 adj_nbr_evaluate_feature (adj_get_index(adj));
226 * adj_nbr_add_or_lock
228 * Add an adjacency for the neighbour requested.
230 * The key for an adj is:
231 * - the Next-hops protocol (i.e. v4 or v6)
232 * - the address of the next-hop
233 * - the interface the next-hop is reachable through
236 adj_nbr_add_or_lock (fib_protocol_t nh_proto,
237 vnet_link_t link_type,
238 const ip46_address_t *nh_addr,
241 adj_index_t adj_index;
243 adj_index = adj_nbr_find(nh_proto, link_type, nh_addr, sw_if_index);
245 if (ADJ_INDEX_INVALID == adj_index)
250 vnm = vnet_get_main();
251 adj = adj_nbr_alloc(nh_proto, link_type, nh_addr, sw_if_index);
252 adj_index = adj_get_index(adj);
255 if (ip46_address_is_equal(&ADJ_BCAST_ADDR, nh_addr))
257 adj->lookup_next_index = IP_LOOKUP_NEXT_BCAST;
260 vnet_rewrite_init(vnm, sw_if_index, link_type,
261 adj_get_nd_node(nh_proto),
262 vnet_tx_node_index_for_sw_interface(vnm, sw_if_index),
263 &adj->rewrite_header);
266 * we need a rewrite where the destination IP address is converted
267 * to the appropriate link-layer address. This is interface specific.
268 * So ask the interface to do it.
270 vnet_update_adjacency_for_sw_interface(vnm, sw_if_index, adj_index);
277 adj_delegate_adj_created(adj_get(adj_index));
282 adj_nbr_add_or_lock_w_rewrite (fib_protocol_t nh_proto,
283 vnet_link_t link_type,
284 const ip46_address_t *nh_addr,
288 adj_index_t adj_index;
290 adj_index = adj_nbr_find(nh_proto, link_type, nh_addr, sw_if_index);
292 if (ADJ_INDEX_INVALID == adj_index)
296 adj = adj_nbr_alloc(nh_proto, link_type, nh_addr, sw_if_index);
297 adj->rewrite_header.sw_if_index = sw_if_index;
298 adj_index = adj_get_index(adj);
302 adj_nbr_update_rewrite(adj_index,
303 ADJ_NBR_REWRITE_FLAG_COMPLETE,
306 adj_delegate_adj_created(adj_get(adj_index));
312 * adj_nbr_update_rewrite
314 * Update the adjacency's rewrite string. A NULL string implies the
315 * rewrite is reset (i.e. when ARP/ND entry is gone).
316 * NB: the adj being updated may be handling traffic in the DP.
319 adj_nbr_update_rewrite (adj_index_t adj_index,
320 adj_nbr_rewrite_flag_t flags,
325 ASSERT(ADJ_INDEX_INVALID != adj_index);
327 adj = adj_get(adj_index);
329 if (flags & ADJ_NBR_REWRITE_FLAG_COMPLETE)
332 * update the adj's rewrite string and build the arc
333 * from the rewrite node to the interface's TX node
335 adj_nbr_update_rewrite_internal(adj, IP_LOOKUP_NEXT_REWRITE,
336 adj_get_rewrite_node(adj->ia_link),
337 vnet_tx_node_index_for_sw_interface(
339 adj->rewrite_header.sw_if_index),
344 adj_nbr_update_rewrite_internal(adj, IP_LOOKUP_NEXT_ARP,
345 adj_get_nd_node(adj->ia_nh_proto),
346 vnet_tx_node_index_for_sw_interface(
348 adj->rewrite_header.sw_if_index),
354 * adj_nbr_update_rewrite_internal
356 * Update the adjacency's rewrite string. A NULL string implies the
357 * rewrite is reset (i.e. when ARP/ND entry is gone).
358 * NB: the adj being updated may be handling traffic in the DP.
361 adj_nbr_update_rewrite_internal (ip_adjacency_t *adj,
362 ip_lookup_next_t adj_next_index,
367 ip_adjacency_t *walk_adj;
368 adj_index_t walk_ai, ai;
373 vm = vlib_get_main();
374 old_next = adj->lookup_next_index;
376 ai = walk_ai = adj_get_index(adj);
377 if (VNET_LINK_MPLS == adj->ia_link)
380 * The link type MPLS has no children in the control plane graph, it only
381 * has children in the data-plane graph. The backwalk is up the former.
382 * So we need to walk from its IP cousin.
384 walk_ai = adj_nbr_find(adj->ia_nh_proto,
385 fib_proto_to_link(adj->ia_nh_proto),
386 &adj->sub_type.nbr.next_hop,
387 adj->rewrite_header.sw_if_index);
391 * Don't call the walk re-entrantly
393 if (ADJ_INDEX_INVALID != walk_ai)
395 walk_adj = adj_get(walk_ai);
396 if (ADJ_FLAG_SYNC_WALK_ACTIVE & walk_adj->ia_flags)
403 * Prevent re-entrant walk of the same adj
405 walk_adj->ia_flags |= ADJ_FLAG_SYNC_WALK_ACTIVE;
415 * lock the adjacencies that are affected by updates this walk will provoke.
416 * Since the aim of the walk is to update children to link to a different
417 * DPO, this adj will no longer be in use and its lock count will drop to 0.
418 * We don't want it to be deleted as part of this endeavour.
424 * Updating a rewrite string is not atomic;
425 * - the rewrite string is too long to write in one instruction
426 * - when swapping from incomplete to complete, we also need to update
427 * the VLIB graph next-index of the adj.
428 * ideally we would only want to suspend forwarding via this adj whilst we
429 * do this, but we do not have that level of granularity - it's suspend all
430 * worker threads or nothing.
431 * The other choices are:
432 * - to mark the adj down and back walk so child load-balances drop this adj
434 * - update the next_node index of this adj to point to error-drop
435 * both of which will mean for MAC change we will drop for this adj
436 * which is not acceptable. However, when the adj changes type (from
437 * complete to incomplete and vice-versa) the child DPOs, which have the
438 * VLIB graph next node index, will be sending packets to the wrong graph
439 * node. So from the options above, updating the next_node of the adj to
440 * be drop will work, but it relies on each graph node v4/v6/mpls, rewrite/
441 * arp/midchain always be valid w.r.t. a mis-match of adj type and node type
442 * (i.e. a rewrite adj in the arp node). This is not enforceable. Getting it
443 * wrong will lead to hard to find bugs since its a race condition. So we
444 * choose the more reliable method of updating the children to use the drop,
445 * then switching adj's type, then updating the children again. Did I mention
446 * that this doesn't happen often...
447 * So we need to distinguish between the two cases:
449 * 2 - adj type change
452 old_next != adj_next_index &&
453 ADJ_INDEX_INVALID != walk_ai)
456 * the adj is changing type. we need to fix all children so that they
457 * stack momentarily on a drop, while the adj changes. If we don't do
458 * this the children will send packets to a VLIB graph node that does
459 * not correspond to the adj's type - and it goes downhill from there.
461 fib_node_back_walk_ctx_t bw_ctx = {
462 .fnbw_reason = FIB_NODE_BW_REASON_FLAG_ADJ_DOWN,
464 * force this walk to be synchronous. if we don't and a node in the graph
465 * (a heavily shared path-list) chooses to back-ground the walk (make it
466 * async) then it will pause and we will do the adj update below, before
467 * all the children are updated. not good.
469 .fnbw_flags = FIB_NODE_BW_FLAG_FORCE_SYNC,
472 fib_walk_sync(FIB_NODE_TYPE_ADJ, walk_ai, &bw_ctx);
474 * fib_walk_sync may allocate a new adjacency and potentially cuase a
475 * realloc for adj_pool. When that happens, adj pointer is no longer
476 * valid here. We refresh the adj pointer accordingly.
482 * If we are just updating the MAC string of the adj (which we also can't
483 * do atomically), then we need to stop packets switching through the adj.
484 * We can't do that on a per-adj basis, so it's all the packets.
485 * If we are updating the type, and we walked back to the children above,
486 * then this barrier serves to flush the queues/frames.
488 vlib_worker_thread_barrier_sync(vm);
490 adj->lookup_next_index = adj_next_index;
491 adj->ia_node_index = this_node;
496 * new rewrite provided.
497 * fill in the adj's rewrite string, and build the VLIB graph arc.
499 vnet_rewrite_set_data_internal(&adj->rewrite_header,
500 sizeof(adj->rewrite_data),
507 vnet_rewrite_clear_data_internal(&adj->rewrite_header,
508 sizeof(adj->rewrite_data));
510 adj->rewrite_header.next_index = vlib_node_add_next(vlib_get_main(),
515 * done with the rewrite update - let the workers loose.
517 vlib_worker_thread_barrier_release(vm);
520 (old_next != adj->lookup_next_index) &&
521 (ADJ_INDEX_INVALID != walk_ai))
524 * backwalk to the children so they can stack on the now updated
527 fib_node_back_walk_ctx_t bw_ctx = {
528 .fnbw_reason = FIB_NODE_BW_REASON_FLAG_ADJ_UPDATE,
531 fib_walk_sync(FIB_NODE_TYPE_ADJ, walk_ai, &bw_ctx);
534 * Prevent re-entrant walk of the same adj
538 walk_adj = adj_get(walk_ai);
539 walk_adj->ia_flags &= ~ADJ_FLAG_SYNC_WALK_ACTIVE;
542 adj_delegate_adj_modified(adj);
548 adj_nbr_db_size (void)
550 fib_protocol_t proto;
554 for (proto = FIB_PROTOCOL_IP4; proto <= FIB_PROTOCOL_IP6; proto++)
556 vec_foreach_index(sw_if_index, adj_nbr_tables[proto])
558 if (NULL != adj_nbr_tables[proto][sw_if_index])
560 count += hash_elts(adj_nbr_tables[proto][sw_if_index]);
568 * @brief Walk all adjacencies on a link for a given next-hop protocol
571 adj_nbr_walk (u32 sw_if_index,
572 fib_protocol_t adj_nh_proto,
576 adj_index_t ai, *ais, *aip;
579 ADJ_NBR_ASSERT_NH_PROTO (adj_nh_proto,);
581 if (!ADJ_NBR_ITF_OK(adj_nh_proto, sw_if_index))
586 /* elements may be removed from the table during the walk, so
587 * collect the set first then process them */
588 hash_foreach_mem (key, ai, adj_nbr_tables[adj_nh_proto][sw_if_index],
593 vec_foreach(aip, ais)
595 /* An adj may be deleted during the walk so check first */
596 if (!pool_is_free_index(adj_pool, *aip))
603 * @brief Walk adjacencies on a link with a given v4 next-hop.
604 * that is visit the adjacencies with different link types.
607 adj_nbr_walk_nh4 (u32 sw_if_index,
608 const ip4_address_t *addr,
612 if (!ADJ_NBR_ITF_OK(FIB_PROTOCOL_IP4, sw_if_index))
615 ip46_address_t nh = {
621 FOR_EACH_VNET_LINK(linkt)
623 ai = adj_nbr_find (FIB_PROTOCOL_IP4, linkt, &nh, sw_if_index);
625 if (INDEX_INVALID != ai)
631 * @brief Walk adjacencies on a link with a given v6 next-hop.
632 * that is visit the adjacencies with different link types.
635 adj_nbr_walk_nh6 (u32 sw_if_index,
636 const ip6_address_t *addr,
640 if (!ADJ_NBR_ITF_OK(FIB_PROTOCOL_IP6, sw_if_index))
643 ip46_address_t nh = {
649 FOR_EACH_VNET_LINK(linkt)
651 ai = adj_nbr_find (FIB_PROTOCOL_IP6, linkt, &nh, sw_if_index);
653 if (INDEX_INVALID != ai)
659 * @brief Walk adjacencies on a link with a given next-hop.
660 * that is visit the adjacencies with different link types.
663 adj_nbr_walk_nh (u32 sw_if_index,
664 fib_protocol_t adj_nh_proto,
665 const ip46_address_t *nh,
669 ADJ_NBR_ASSERT_NH_PROTO (adj_nh_proto,);
671 if (!ADJ_NBR_ITF_OK(adj_nh_proto, sw_if_index))
674 switch (adj_nh_proto)
676 case FIB_PROTOCOL_IP4:
677 adj_nbr_walk_nh4(sw_if_index, &nh->ip4, cb, ctx);
679 case FIB_PROTOCOL_IP6:
680 adj_nbr_walk_nh6(sw_if_index, &nh->ip6, cb, ctx);
682 case FIB_PROTOCOL_MPLS:
689 * Flags associated with the interface state walks
691 typedef enum adj_nbr_interface_flags_t_
693 ADJ_NBR_INTERFACE_UP = (1 << 0),
694 } adj_nbr_interface_flags_t;
697 * Context for the state change walk of the DB
699 typedef struct adj_nbr_interface_state_change_ctx_t_
702 * Flags on the interface
704 adj_nbr_interface_flags_t flags;
705 } adj_nbr_interface_state_change_ctx_t;
708 adj_nbr_interface_state_change_one (adj_index_t ai,
712 * Back walk the graph to inform the forwarding entries
713 * that this interface state has changed. Do this synchronously
714 * since this is the walk that provides convergence
716 adj_nbr_interface_state_change_ctx_t *ctx = arg;
717 fib_node_back_walk_ctx_t bw_ctx = {
718 .fnbw_reason = ((ctx->flags & ADJ_NBR_INTERFACE_UP) ?
719 FIB_NODE_BW_REASON_FLAG_INTERFACE_UP :
720 FIB_NODE_BW_REASON_FLAG_INTERFACE_DOWN),
722 * the force sync applies only as far as the first fib_entry.
723 * And it's the fib_entry's we need to converge away from
724 * the adjacencies on the now down link
726 .fnbw_flags = (!(ctx->flags & ADJ_NBR_INTERFACE_UP) ?
727 FIB_NODE_BW_FLAG_FORCE_SYNC :
728 FIB_NODE_BW_FLAG_NONE),
734 adj->ia_flags |= ADJ_FLAG_SYNC_WALK_ACTIVE;
735 fib_walk_sync(FIB_NODE_TYPE_ADJ, ai, &bw_ctx);
736 adj->ia_flags &= ~ADJ_FLAG_SYNC_WALK_ACTIVE;
738 return (ADJ_WALK_RC_CONTINUE);
742 * @brief Registered function for SW interface state changes
744 static clib_error_t *
745 adj_nbr_sw_interface_state_change (vnet_main_t * vnm,
749 fib_protocol_t proto;
752 * walk each adj on the interface and trigger a walk from that adj
754 for (proto = FIB_PROTOCOL_IP4; proto <= FIB_PROTOCOL_IP6; proto++)
756 adj_nbr_interface_state_change_ctx_t ctx = {
757 .flags = ((flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) ?
758 ADJ_NBR_INTERFACE_UP :
762 adj_nbr_walk(sw_if_index, proto,
763 adj_nbr_interface_state_change_one,
770 VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION_PRIO(
771 adj_nbr_sw_interface_state_change,
772 VNET_ITF_FUNC_PRIORITY_HIGH);
775 * @brief Invoked on each SW interface of a HW interface when the
776 * HW interface state changes
779 adj_nbr_hw_sw_interface_state_change (vnet_main_t * vnm,
783 adj_nbr_interface_state_change_ctx_t *ctx = arg;
784 fib_protocol_t proto;
787 * walk each adj on the interface and trigger a walk from that adj
789 for (proto = FIB_PROTOCOL_IP4; proto <= FIB_PROTOCOL_IP6; proto++)
791 adj_nbr_walk(sw_if_index, proto,
792 adj_nbr_interface_state_change_one,
795 return (WALK_CONTINUE);
799 * @brief Registered callback for HW interface state changes
801 static clib_error_t *
802 adj_nbr_hw_interface_state_change (vnet_main_t * vnm,
807 * walk SW interface on the HW
809 adj_nbr_interface_state_change_ctx_t ctx = {
810 .flags = ((flags & VNET_HW_INTERFACE_FLAG_LINK_UP) ?
811 ADJ_NBR_INTERFACE_UP :
815 vnet_hw_interface_walk_sw(vnm, hw_if_index,
816 adj_nbr_hw_sw_interface_state_change,
822 VNET_HW_INTERFACE_LINK_UP_DOWN_FUNCTION_PRIO(
823 adj_nbr_hw_interface_state_change,
824 VNET_ITF_FUNC_PRIORITY_HIGH);
827 adj_nbr_interface_delete_one (adj_index_t ai,
831 * Back walk the graph to inform the forwarding entries
832 * that this interface has been deleted.
834 fib_node_back_walk_ctx_t bw_ctx = {
835 .fnbw_reason = FIB_NODE_BW_REASON_FLAG_INTERFACE_DELETE,
843 adj->ia_flags |= ADJ_FLAG_SYNC_WALK_ACTIVE;
844 fib_walk_sync(FIB_NODE_TYPE_ADJ, ai, &bw_ctx);
845 adj->ia_flags &= ~ADJ_FLAG_SYNC_WALK_ACTIVE;
848 return (ADJ_WALK_RC_CONTINUE);
852 * adj_nbr_interface_add_del
854 * Registered to receive interface Add and delete notifications
856 static clib_error_t *
857 adj_nbr_interface_add_del (vnet_main_t * vnm,
861 fib_protocol_t proto;
866 * not interested in interface additions. we will not back walk
867 * to resolve paths through newly added interfaces. Why? The control
868 * plane should have the brains to add interfaces first, then routes.
869 * So the case where there are paths with a interface that matches
870 * one just created is the case where the path resolved through an
871 * interface that was deleted, and still has not been removed. The
872 * new interface added, is NO GUARANTEE that the interface being
873 * added now, even though it may have the same sw_if_index, is the
874 * same interface that the path needs. So tough!
875 * If the control plane wants these routes to resolve it needs to
876 * remove and add them again.
881 for (proto = FIB_PROTOCOL_IP4; proto <= FIB_PROTOCOL_IP6; proto++)
883 adj_nbr_walk(sw_if_index, proto,
884 adj_nbr_interface_delete_one,
892 VNET_SW_INTERFACE_ADD_DEL_FUNCTION(adj_nbr_interface_add_del);
896 adj_nbr_show_one (adj_index_t ai,
899 vlib_cli_output (arg, "[@%d] %U",
901 format_ip_adjacency, ai,
902 FORMAT_IP_ADJACENCY_NONE);
904 return (ADJ_WALK_RC_CONTINUE);
907 static clib_error_t *
908 adj_nbr_show (vlib_main_t * vm,
909 unformat_input_t * input,
910 vlib_cli_command_t * cmd)
912 adj_index_t ai = ADJ_INDEX_INVALID;
913 ip46_address_t nh = ip46_address_initializer;
914 u32 sw_if_index = ~0;
916 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
918 if (unformat (input, "%U",
919 unformat_vnet_sw_interface, vnet_get_main(),
922 else if (unformat (input, "%U",
923 unformat_ip46_address, &nh, IP46_TYPE_ANY))
925 else if (unformat (input, "%d", &ai))
931 if (ADJ_INDEX_INVALID != ai)
933 vlib_cli_output (vm, "[@%d] %U",
935 format_ip_adjacency, ai,
936 FORMAT_IP_ADJACENCY_DETAIL);
938 else if (~0 != sw_if_index)
940 fib_protocol_t proto;
942 if (ip46_address_is_zero(&nh))
944 for (proto = FIB_PROTOCOL_IP4; proto <= FIB_PROTOCOL_IP6; proto++)
946 adj_nbr_walk(sw_if_index, proto,
953 proto = (ip46_address_is_ip4(&nh) ?
956 adj_nbr_walk_nh(sw_if_index, proto, &nh,
963 fib_protocol_t proto;
965 for (proto = FIB_PROTOCOL_IP4; proto <= FIB_PROTOCOL_IP6; proto++)
967 vec_foreach_index(sw_if_index, adj_nbr_tables[proto])
969 adj_nbr_walk(sw_if_index, proto,
980 * Show all neighbour adjacencies.
982 * @cliexstart{sh adj nbr}
983 * [@2] ipv4 via 1.0.0.2 loop0: IP4: 00:00:22:aa:bb:cc -> 00:00:11:aa:bb:cc
984 * [@3] mpls via 1.0.0.2 loop0: MPLS_UNICAST: 00:00:22:aa:bb:cc -> 00:00:11:aa:bb:cc
985 * [@4] ipv4 via 1.0.0.3 loop0: IP4: 00:00:22:aa:bb:cc -> 00:00:11:aa:bb:cc
986 * [@5] mpls via 1.0.0.3 loop0: MPLS_UNICAST: 00:00:22:aa:bb:cc -> 00:00:11:aa:bb:cc
989 VLIB_CLI_COMMAND (ip4_show_fib_command, static) = {
990 .path = "show adj nbr",
991 .short_help = "show adj nbr [<adj_index>] [interface]",
992 .function = adj_nbr_show,
996 format_adj_nbr_incomplete (u8* s, va_list *ap)
998 index_t index = va_arg(*ap, index_t);
999 CLIB_UNUSED(u32 indent) = va_arg(*ap, u32);
1000 vnet_main_t * vnm = vnet_get_main();
1001 ip_adjacency_t * adj = adj_get(index);
1003 s = format (s, "arp-%U", format_vnet_link, adj->ia_link);
1004 s = format (s, ": via %U",
1005 format_ip46_address, &adj->sub_type.nbr.next_hop,
1006 adj_proto_to_46(adj->ia_nh_proto));
1007 s = format (s, " %U",
1008 format_vnet_sw_if_index_name,
1009 vnm, adj->rewrite_header.sw_if_index);
1015 format_adj_nbr (u8* s, va_list *ap)
1017 index_t index = va_arg(*ap, index_t);
1018 CLIB_UNUSED(u32 indent) = va_arg(*ap, u32);
1019 ip_adjacency_t * adj = adj_get(index);
1021 s = format (s, "%U", format_vnet_link, adj->ia_link);
1022 s = format (s, " via %U ",
1023 format_ip46_address, &adj->sub_type.nbr.next_hop,
1024 adj_proto_to_46(adj->ia_nh_proto));
1025 s = format (s, "%U",
1026 format_vnet_rewrite,
1027 &adj->rewrite_header, sizeof (adj->rewrite_data), 0);
1033 adj_dpo_lock (dpo_id_t *dpo)
1035 adj_lock(dpo->dpoi_index);
1038 adj_dpo_unlock (dpo_id_t *dpo)
1040 adj_unlock(dpo->dpoi_index);
1046 fib_show_memory_usage("Adjacency",
1047 pool_elts(adj_pool),
1049 sizeof(ip_adjacency_t));
1052 const static dpo_vft_t adj_nbr_dpo_vft = {
1053 .dv_lock = adj_dpo_lock,
1054 .dv_unlock = adj_dpo_unlock,
1055 .dv_format = format_adj_nbr,
1056 .dv_mem_show = adj_mem_show,
1057 .dv_get_urpf = adj_dpo_get_urpf,
1059 const static dpo_vft_t adj_nbr_incompl_dpo_vft = {
1060 .dv_lock = adj_dpo_lock,
1061 .dv_unlock = adj_dpo_unlock,
1062 .dv_format = format_adj_nbr_incomplete,
1063 .dv_get_urpf = adj_dpo_get_urpf,
1067 * @brief The per-protocol VLIB graph nodes that are assigned to an adjacency
1070 * this means that these graph nodes are ones from which a nbr is the
1071 * parent object in the DPO-graph.
1073 const static char* const nbr_ip4_nodes[] =
1078 const static char* const nbr_ip6_nodes[] =
1083 const static char* const nbr_mpls_nodes[] =
1088 const static char* const nbr_ethernet_nodes[] =
1093 const static char* const * const nbr_nodes[DPO_PROTO_NUM] =
1095 [DPO_PROTO_IP4] = nbr_ip4_nodes,
1096 [DPO_PROTO_IP6] = nbr_ip6_nodes,
1097 [DPO_PROTO_MPLS] = nbr_mpls_nodes,
1098 [DPO_PROTO_ETHERNET] = nbr_ethernet_nodes,
1101 const static char* const nbr_incomplete_ip4_nodes[] =
1106 const static char* const nbr_incomplete_ip6_nodes[] =
1108 "ip6-discover-neighbor",
1111 const static char* const nbr_incomplete_mpls_nodes[] =
1113 "mpls-adj-incomplete",
1117 const static char* const * const nbr_incomplete_nodes[DPO_PROTO_NUM] =
1119 [DPO_PROTO_IP4] = nbr_incomplete_ip4_nodes,
1120 [DPO_PROTO_IP6] = nbr_incomplete_ip6_nodes,
1121 [DPO_PROTO_MPLS] = nbr_incomplete_mpls_nodes,
1125 adj_nbr_module_init (void)
1127 dpo_register(DPO_ADJACENCY,
1130 dpo_register(DPO_ADJACENCY_INCOMPLETE,
1131 &adj_nbr_incompl_dpo_vft,
1132 nbr_incomplete_nodes);