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Vector Packet Processing
arp.c
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1 /*
2  * ethernet/arp.c: IP v4 ARP node
3  *
4  * Copyright (c) 2010 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 <vnet/ip/ip.h>
19 #include <vnet/ip/ip_neighbor.h>
20 #include <vnet/ip/ip6.h>
21 #include <vnet/ethernet/ethernet.h>
22 #include <vnet/ethernet/arp.h>
23 #include <vnet/l2/l2_input.h>
24 #include <vppinfra/mhash.h>
25 #include <vnet/fib/ip4_fib.h>
26 #include <vnet/fib/fib_entry_src.h>
27 #include <vnet/adj/adj_nbr.h>
28 #include <vnet/adj/adj_mcast.h>
29 #include <vnet/mpls/mpls.h>
30 #include <vnet/l2/feat_bitmap.h>
31 
32 #include <vlibmemory/api.h>
33 
34 /**
35  * @file
36  * @brief IPv4 ARP.
37  *
38  * This file contains code to manage the IPv4 ARP tables (IP Address
39  * to MAC Address lookup).
40  */
41 
42 
43 /**
44  * @brief Per-interface ARP configuration and state
45  */
47 {
48  /**
49  * Hash table of ARP entries.
50  * Since this hash table is per-interface, the key is only the IPv4 address.
51  */
53  /**
54  * Is ARP enabled on this interface
55  */
57  /**
58  * Is Proxy ARP enabled on this interface
59  */
62 
63 typedef struct
64 {
69 
70 typedef struct
71 {
76  /* Used for arp event notification only */
80 
81 typedef struct
82 {
83  /* Hash tables mapping name to opcode. */
85 
86  /* lite beer "glean" adjacency handling */
89 
90  /* Mac address change notification */
93 
95 
96  /* ARP attack mitigation */
99 
100  /** Per interface state */
102 
103  /* Proxy arp vector */
105 
108 
109  /* ARP feature arc index */
112 
114 
115 typedef struct
116 {
122 #define ETHERNET_ARP_ARGS_REMOVE (1<<0)
123 #define ETHERNET_ARP_ARGS_FLUSH (1<<1)
124 #define ETHERNET_ARP_ARGS_POPULATE (1<<2)
125 #define ETHERNET_ARP_ARGS_WC_PUB (1<<3)
127 
128 static const u8 vrrp_prefix[] = { 0x00, 0x00, 0x5E, 0x00, 0x01 };
129 
130 /* Node index for send_garp_na_process */
132 
133 static void
135  * a);
136 
137 static u8 *
139 {
141  char *t = 0;
142  switch (h)
143  {
144 #define _(n,f) case n: t = #f; break;
146 #undef _
147 
148  default:
149  return format (s, "unknown 0x%x", h);
150  }
151 
152  return format (s, "%s", t);
153 }
154 
155 static u8 *
156 format_ethernet_arp_opcode (u8 * s, va_list * va)
157 {
159  char *t = 0;
160  switch (o)
161  {
162 #define _(f) case ETHERNET_ARP_OPCODE_##f: t = #f; break;
164 #undef _
165 
166  default:
167  return format (s, "unknown 0x%x", o);
168  }
169 
170  return format (s, "%s", t);
171 }
172 
173 static uword
175  va_list * args)
176 {
177  int *result = va_arg (*args, int *);
179  int x, i;
180 
181  /* Numeric opcode. */
182  if (unformat (input, "0x%x", &x) || unformat (input, "%d", &x))
183  {
184  if (x >= (1 << 16))
185  return 0;
186  *result = x;
187  return 1;
188  }
189 
190  /* Named type. */
192  am->opcode_by_name, &i))
193  {
194  *result = i;
195  return 1;
196  }
197 
198  return 0;
199 }
200 
201 static uword
203  va_list * args)
204 {
205  int *result = va_arg (*args, int *);
206  if (!unformat_user
208  return 0;
209 
210  *result = clib_host_to_net_u16 ((u16) * result);
211  return 1;
212 }
213 
214 static u8 *
215 format_ethernet_arp_header (u8 * s, va_list * va)
216 {
217  ethernet_arp_header_t *a = va_arg (*va, ethernet_arp_header_t *);
218  u32 max_header_bytes = va_arg (*va, u32);
219  u32 indent;
220  u16 l2_type, l3_type;
221 
222  if (max_header_bytes != 0 && sizeof (a[0]) > max_header_bytes)
223  return format (s, "ARP header truncated");
224 
225  l2_type = clib_net_to_host_u16 (a->l2_type);
226  l3_type = clib_net_to_host_u16 (a->l3_type);
227 
228  indent = format_get_indent (s);
229 
230  s = format (s, "%U, type %U/%U, address size %d/%d",
231  format_ethernet_arp_opcode, clib_net_to_host_u16 (a->opcode),
233  format_ethernet_type, l3_type,
235 
236  if (l2_type == ETHERNET_ARP_HARDWARE_TYPE_ethernet
237  && l3_type == ETHERNET_TYPE_IP4)
238  {
239  s = format (s, "\n%U%U/%U -> %U/%U",
240  format_white_space, indent,
245  }
246  else
247  {
248  uword n2 = a->n_l2_address_bytes;
249  uword n3 = a->n_l3_address_bytes;
250  s = format (s, "\n%U%U/%U -> %U/%U",
251  format_white_space, indent,
252  format_hex_bytes, a->data + 0 * n2 + 0 * n3, n2,
253  format_hex_bytes, a->data + 1 * n2 + 0 * n3, n3,
254  format_hex_bytes, a->data + 1 * n2 + 1 * n3, n2,
255  format_hex_bytes, a->data + 2 * n2 + 1 * n3, n3);
256  }
257 
258  return s;
259 }
260 
261 u8 *
263 {
264  vnet_main_t *vnm = va_arg (*va, vnet_main_t *);
267 
268  if (!e)
269  return format (s, "%=12s%=16s%=6s%=20s%=24s", "Time", "IP4",
270  "Flags", "Ethernet", "Interface");
271 
272  si = vnet_get_sw_interface (vnm, e->sw_if_index);
273 
274  return format (s, "%=12U%=16U%=6U%=20U%U",
280 }
281 
282 typedef struct
283 {
284  u8 packet_data[64];
286 
287 static u8 *
289 {
290  CLIB_UNUSED (vlib_main_t * vm) = va_arg (*va, vlib_main_t *);
291  CLIB_UNUSED (vlib_node_t * node) = va_arg (*va, vlib_node_t *);
293 
294  s = format (s, "%U",
296  t->packet_data, sizeof (t->packet_data));
297 
298  return s;
299 }
300 
301 static u8 *
302 format_arp_term_input_trace (u8 * s, va_list * va)
303 {
304  CLIB_UNUSED (vlib_main_t * vm) = va_arg (*va, vlib_main_t *);
305  CLIB_UNUSED (vlib_node_t * node) = va_arg (*va, vlib_node_t *);
307 
308  /* arp-term trace data saved is either arp or ip6/icmp6 packet:
309  - for arp, the 1st 16-bit field is hw type of value of 0x0001.
310  - for ip6, the first nibble has value of 6. */
311  s = format (s, "%U", t->packet_data[0] == 0 ?
313  t->packet_data, sizeof (t->packet_data));
314 
315  return s;
316 }
317 
318 static void
320 {
321  vnet_main_t *vnm = vnet_get_main ();
322  ip4_main_t *im = &ip4_main;
328  vlib_buffer_t *b;
329  vlib_main_t *vm;
330  u32 bi = 0;
331 
332  vm = vlib_get_main ();
333 
334  si = vnet_get_sw_interface (vnm, adj->rewrite_header.sw_if_index);
335 
337  {
338  return;
339  }
340 
341  src =
343  &adj->sub_type.nbr.next_hop.
344  ip4,
345  adj->rewrite_header.
346  sw_if_index, &ia);
347  if (!src)
348  {
349  return;
350  }
351 
352  h =
354  &bi);
355  if (!h)
356  return;
357 
358  hi = vnet_get_sup_hw_interface (vnm, adj->rewrite_header.sw_if_index);
359 
361 
362  h->ip4_over_ethernet[0].ip4 = src[0];
363  h->ip4_over_ethernet[1].ip4 = adj->sub_type.nbr.next_hop.ip4;
364 
365  b = vlib_get_buffer (vm, bi);
366  vnet_buffer (b)->sw_if_index[VLIB_RX] =
367  vnet_buffer (b)->sw_if_index[VLIB_TX] = adj->rewrite_header.sw_if_index;
368 
369  /* Add encapsulation string for software interface (e.g. ethernet header). */
370  vnet_rewrite_one_header (adj[0], h, sizeof (ethernet_header_t));
371  vlib_buffer_advance (b, -adj->rewrite_header.data_bytes);
372 
373  {
375  u32 *to_next = vlib_frame_vector_args (f);
376  to_next[0] = bi;
377  f->n_vectors = 1;
379  }
380 }
381 
382 static void
384 {
388  e->sw_if_index,
389  adj_get_link_type (ai), &e->mac));
390 }
391 
392 static void
394 {
395  ip_adjacency_t *adj = adj_get (ai);
396 
398  (ai,
401  adj->rewrite_header.sw_if_index,
404 }
405 
408 {
410  ethernet_arp_ip4_entry_t *e = NULL;
411  uword *p;
412 
413  if (NULL != eai->arp_entries)
414  {
415  p = hash_get (eai->arp_entries, addr->as_u32);
416  if (!p)
417  return (NULL);
418 
419  e = pool_elt_at_index (am->ip4_entry_pool, p[0]);
420  }
421 
422  return (e);
423 }
424 
425 static adj_walk_rc_t
427 {
429 
430  arp_mk_complete (ai, e);
431 
432  return (ADJ_WALK_RC_CONTINUE);
433 }
434 
435 static adj_walk_rc_t
437 {
438  arp_mk_incomplete (ai);
439 
440  return (ADJ_WALK_RC_CONTINUE);
441 }
442 
443 static int
445 {
446  if (vec_len (am->ethernet_arp_by_sw_if_index) <= sw_if_index)
447  return 0;
448 
449  return (am->ethernet_arp_by_sw_if_index[sw_if_index].enabled);
450 }
451 
452 static void
454 {
455  if (arp_is_enabled (am, sw_if_index))
456  return;
457 
458  vec_validate (am->ethernet_arp_by_sw_if_index, sw_if_index);
459 
461 
462  vnet_feature_enable_disable ("arp", "arp-reply", sw_if_index, 1, NULL, 0);
463  vnet_feature_enable_disable ("arp", "arp-disabled", sw_if_index, 0, NULL,
464  0);
465 }
466 
467 static int
470  * args);
471 
472 static void
474 {
477  u32 i, *to_delete = 0;
478  hash_pair_t *pair;
479 
480  if (!arp_is_enabled (am, sw_if_index))
481  return;
482 
483  vnet_feature_enable_disable ("arp", "arp-disabled", sw_if_index, 1, NULL,
484  0);
485  vnet_feature_enable_disable ("arp", "arp-reply", sw_if_index, 0, NULL, 0);
486 
488 
489 
490  /* *INDENT-OFF* */
491  hash_foreach_pair (pair, eai->arp_entries,
492  ({
493  e = pool_elt_at_index(am->ip4_entry_pool,
494  pair->value[0]);
495  vec_add1 (to_delete, e - am->ip4_entry_pool);
496  }));
497  /* *INDENT-ON* */
498 
499  for (i = 0; i < vec_len (to_delete); i++)
500  {
501  e = pool_elt_at_index (am->ip4_entry_pool, to_delete[i]);
502 
505  .sw_if_index = e->sw_if_index,
506  .flags = ETHERNET_ARP_ARGS_FLUSH,
507  };
508  mac_address_copy (&delme.mac, &e->mac);
509 
511  }
512 
513  vec_free (to_delete);
514 
515  eai->enabled = 0;
516 }
517 
518 void
520 {
522  ethernet_arp_interface_t *arp_int;
524  ip_adjacency_t *adj;
525 
526  adj = adj_get (ai);
527 
528  arp_enable (am, sw_if_index);
530  e = arp_entry_find (arp_int, &adj->sub_type.nbr.next_hop.ip4);
531 
532  switch (adj->lookup_next_index)
533  {
536  break;
537  case IP_LOOKUP_NEXT_ARP:
538  if (NULL != e)
539  {
540  adj_nbr_walk_nh4 (sw_if_index,
542  }
543  else
544  {
545  /*
546  * no matching ARP entry.
547  * construct the rewrite required to for an ARP packet, and stick
548  * that in the adj's pipe to smoke.
549  */
551  (ai,
554  (vnm,
555  sw_if_index,
558 
559  /*
560  * since the FIB has added this adj for a route, it makes sense it
561  * may want to forward traffic sometime soon. Let's send a
562  * speculative ARP. just one. If we were to do periodically that
563  * wouldn't be bad either, but that's more code than i'm prepared to
564  * write at this time for relatively little reward.
565  */
566  /*
567  * adj_nbr_update_rewrite may actually call fib_walk_sync.
568  * fib_walk_sync may allocate a new adjacency and potentially cause
569  * a realloc for adj_pool. When that happens, adj pointer is no
570  * longer valid here. We refresh adj pointer accordingly.
571  */
572  adj = adj_get (ai);
573  arp_nbr_probe (adj);
574  }
575  break;
580  (vnm,
581  sw_if_index,
584  /*
585  * Caution: adj_nbr_update_rewrite may actually call fib_walk_sync.
586  * fib_walk_sync may allocate a new adjacency and potentially cause a
587  * realloc for adj_pool. When that happens, adj pointer is no longer
588  * valid here. Please refresh adj pointer accordingly if it is still
589  * needed after the aformentioned call.
590  */
591  break;
593  {
594  /*
595  * Construct a partial rewrite from the known ethernet mcast dest MAC
596  */
597  u8 *rewrite;
598  u8 offset;
599 
600  rewrite = ethernet_build_rewrite (vnm,
601  sw_if_index,
602  adj->ia_link,
604  offset = vec_len (rewrite) - 2;
605 
606  /*
607  * Complete the remaining fields of the adj's rewrite to direct the
608  * complete of the rewrite at switch time by copying in the IP
609  * dst address's bytes.
610  * Offset is 2 bytes into the MAC destination address.
611  */
612  adj_mcast_update_rewrite (ai, rewrite, offset);
613 
614  break;
615  }
616  case IP_LOOKUP_NEXT_DROP:
617  case IP_LOOKUP_NEXT_PUNT:
623  case IP_LOOKUP_N_NEXT:
624  ASSERT (0);
625  break;
626  }
627 }
628 
629 static void
631 {
632  fib_prefix_t pfx = {
633  .fp_len = 32,
634  .fp_proto = FIB_PROTOCOL_IP4,
635  .fp_addr.ip4 = e->ip4_address,
636  };
637 
638  e->fib_entry_index =
639  fib_table_entry_path_add (fib_index, &pfx, FIB_SOURCE_ADJ,
641  DPO_PROTO_IP4, &pfx.fp_addr,
642  e->sw_if_index, ~0, 1, NULL,
645 }
646 
647 static void
649 {
651  {
652  fib_prefix_t pfx = {
653  .fp_len = 32,
654  .fp_proto = FIB_PROTOCOL_IP4,
655  .fp_addr.ip4 = e->ip4_address,
656  };
657  u32 fib_index;
658 
660 
661  fib_table_entry_path_remove (fib_index, &pfx,
664  &pfx.fp_addr,
665  e->sw_if_index, ~0, 1,
668  }
669 }
670 
673 {
676  u32 count = 0;
678  if (index == ~0) /* Try again from elt 0 */
679  index = pool_next_index (am->ip4_entry_pool, index);
680 
681  /* Find a non-static random entry to free up for reuse */
682  do
683  {
684  if ((count++ == 100) || (index == ~0))
685  return NULL; /* give up after 100 entries */
686  e = pool_elt_at_index (am->ip4_entry_pool, index);
687  am->arp_delete_rotor = index;
688  index = pool_next_index (am->ip4_entry_pool, index);
689  }
690  while (e->flags & IP_NEIGHBOR_FLAG_STATIC);
691 
692  /* Remove ARP entry from its interface and update fib */
693  hash_unset
695  e->ip4_address.as_u32);
700  return e;
701 }
702 
703 static int
706  * args)
707 {
711  int make_new_arp_cache_entry = 1;
712  uword *p;
713  pending_resolution_t *pr, *mc;
714  ethernet_arp_interface_t *arp_int;
715  u32 sw_if_index = args->sw_if_index;
716 
717  arp_enable (am, sw_if_index);
718 
720 
721  if (NULL != arp_int->arp_entries)
722  {
723  p = hash_get (arp_int->arp_entries, args->ip4.as_u32);
724  if (p)
725  {
726  e = pool_elt_at_index (am->ip4_entry_pool, p[0]);
727 
728  /* Refuse to over-write static arp. */
729  if (!(args->nbr_flags & IP_NEIGHBOR_FLAG_STATIC) &&
731  {
732  /* if MAC address match, still check to send event */
733  if (mac_address_equal (&e->mac, &args->mac))
734  goto check_customers;
735  return -2;
736  }
737  make_new_arp_cache_entry = 0;
738  }
739  }
740 
741  if (make_new_arp_cache_entry)
742  {
743  if (am->limit_arp_cache_size &&
745  {
746  e = force_reuse_arp_entry ();
747  if (NULL == e)
748  return -2;
749  }
750  else
751  pool_get (am->ip4_entry_pool, e);
752 
753  if (NULL == arp_int->arp_entries)
754  arp_int->arp_entries = hash_create (0, sizeof (u32));
755 
756  hash_set (arp_int->arp_entries, args->ip4.as_u32,
757  e - am->ip4_entry_pool);
758 
760  e->ip4_address = args->ip4;
762  mac_address_copy (&e->mac, &args->mac);
763 
765  {
766  arp_adj_fib_add (e,
768  (e->sw_if_index));
769  }
770  else
771  {
773  }
774  }
775  else
776  {
777  /*
778  * prevent a DoS attack from the data-plane that
779  * spams us with no-op updates to the MAC address
780  */
781  if (mac_address_equal (&e->mac, &args->mac))
782  {
784  goto check_customers;
785  }
786 
787  /* Update ethernet address. */
788  mac_address_copy (&e->mac, &args->mac);
789  }
790 
791  /* Update time stamp and flags. */
794  {
797  }
798  else
799  {
802  }
803 
804  adj_nbr_walk_nh4 (sw_if_index, &e->ip4_address, arp_mk_complete_walk, e);
805 
806 check_customers:
807  /* Customer(s) waiting for this address to be resolved? */
809  if (p)
810  {
811  u32 next_index;
812  next_index = p[0];
813 
814  while (next_index != (u32) ~ 0)
815  {
816  pr = pool_elt_at_index (am->pending_resolutions, next_index);
818  pr->type_opaque, pr->data);
819  next_index = pr->next_index;
820  pool_put (am->pending_resolutions, pr);
821  }
822 
824  }
825 
826  /* Customer(s) requesting ARP event for this address? */
827  p = hash_get (am->mac_changes_by_address, args->ip4.as_u32);
828  if (p)
829  {
830  u32 next_index;
831  next_index = p[0];
832 
833  while (next_index != (u32) ~ 0)
834  {
835  int rv = 1;
836  mc = pool_elt_at_index (am->mac_changes, next_index);
837 
838  /* Call the user's data callback, return 1 to suppress dup events */
839  if (mc->data_callback)
840  rv = (mc->data_callback) (mc->data, &args->mac, sw_if_index, 0);
841 
842  /*
843  * Signal the resolver process, as long as the user
844  * says they want to be notified
845  */
846  if (rv == 0)
848  mc->type_opaque, mc->data);
849  next_index = mc->next_index;
850  }
851  }
852 
853  return 0;
854 }
855 
856 void
858  void *address_arg,
859  uword node_index,
860  uword type_opaque, uword data)
861 {
863  ip4_address_t *address = address_arg;
864  uword *p;
866 
867  pool_get (am->pending_resolutions, pr);
868 
869  pr->next_index = ~0;
870  pr->node_index = node_index;
871  pr->type_opaque = type_opaque;
872  pr->data = data;
873  pr->data_callback = 0;
874 
875  p = hash_get (am->pending_resolutions_by_address, address->as_u32);
876  if (p)
877  {
878  /* Insert new resolution at the head of the list */
879  pr->next_index = p[0];
881  }
882 
884  pr - am->pending_resolutions);
885 }
886 
887 int
890  u32 pid,
891  void *address_arg,
892  uword node_index,
893  uword type_opaque, uword data, int is_add)
894 {
896  ip4_address_t *address = address_arg;
897 
898  /* Try to find an existing entry */
899  u32 *first = (u32 *) hash_get (am->mac_changes_by_address, address->as_u32);
900  u32 *p = first;
902  while (p && *p != ~0)
903  {
904  mc = pool_elt_at_index (am->mac_changes, *p);
905  if (mc->node_index == node_index && mc->type_opaque == type_opaque
906  && mc->pid == pid)
907  break;
908  p = &mc->next_index;
909  }
910 
911  int found = p && *p != ~0;
912  if (is_add)
913  {
914  if (found)
915  return VNET_API_ERROR_ENTRY_ALREADY_EXISTS;
916 
917  pool_get (am->mac_changes, mc);
918  /* *INDENT-OFF* */
919  *mc = (pending_resolution_t)
920  {
921  .next_index = ~0,
922  .node_index = node_index,
923  .type_opaque = type_opaque,
924  .data = data,
925  .data_callback = data_callback,
926  .pid = pid,
927  };
928  /* *INDENT-ON* */
929 
930  /* Insert new resolution at the end of the list */
931  u32 new_idx = mc - am->mac_changes;
932  if (p)
933  p[0] = new_idx;
934  else
935  hash_set (am->mac_changes_by_address, address->as_u32, new_idx);
936  }
937  else
938  {
939  if (!found)
940  return VNET_API_ERROR_NO_SUCH_ENTRY;
941 
942  /* Clients may need to clean up pool entries, too */
943  if (data_callback)
944  /* no new mac addrs */
945  (data_callback) (mc->data, NULL, ~0, NULL);
946 
947  /* Remove the entry from the list and delete the entry */
948  *p = mc->next_index;
949  pool_put (am->mac_changes, mc);
950 
951  /* Remove from hash if we deleted the last entry */
952  if (*p == ~0 && p == first)
953  hash_unset (am->mac_changes_by_address, address->as_u32);
954  }
955  return 0;
956 }
957 
958 /* Either we drop the packet or we send a reply to the sender. */
959 typedef enum
960 {
965 
966 #define foreach_ethernet_arp_error \
967  _ (replies_sent, "ARP replies sent") \
968  _ (l2_type_not_ethernet, "L2 type not ethernet") \
969  _ (l3_type_not_ip4, "L3 type not IP4") \
970  _ (l3_src_address_not_local, "IP4 source address not local to subnet") \
971  _ (l3_dst_address_not_local, "IP4 destination address not local to subnet") \
972  _ (l3_dst_address_unset, "IP4 destination address is unset") \
973  _ (l3_src_address_is_local, "IP4 source address matches local interface") \
974  _ (l3_src_address_learned, "ARP request IP4 source address learned") \
975  _ (replies_received, "ARP replies received") \
976  _ (opcode_not_request, "ARP opcode not request") \
977  _ (proxy_arp_replies_sent, "Proxy ARP replies sent") \
978  _ (l2_address_mismatch, "ARP hw addr does not match L2 frame src addr") \
979  _ (gratuitous_arp, "ARP probe or announcement dropped") \
980  _ (interface_no_table, "Interface is not mapped to an IP table") \
981  _ (interface_not_ip_enabled, "Interface is not IP enabled") \
982  _ (unnumbered_mismatch, "RX interface is unnumbered to different subnet") \
983 
984 typedef enum
985 {
986 #define _(sym,string) ETHERNET_ARP_ERROR_##sym,
988 #undef _
991 
992 static int
994  u32 input_sw_if_index, u32 conn_sw_if_index)
995 {
996  vnet_main_t *vnm = vnet_get_main ();
999 
1000  /* verify that the input interface is unnumbered to the connected.
1001  * the connected interface is the interface on which the subnet is
1002  * configured */
1003  si = &vim->sw_interfaces[input_sw_if_index];
1004 
1006  (si->unnumbered_sw_if_index == conn_sw_if_index)))
1007  {
1008  /* the input interface is not unnumbered to the interface on which
1009  * the sub-net is configured that covers the ARP request.
1010  * So this is not the case for unnumbered.. */
1011  return 0;
1012  }
1013 
1014  return !0;
1015 }
1016 
1017 static u32
1020  const ethernet_arp_ip4_over_ethernet_address_t * addr)
1021 {
1022  vnet_arp_set_ip4_over_ethernet (vnm, sw_if_index, addr, 0);
1023  return (ETHERNET_ARP_ERROR_l3_src_address_learned);
1024 }
1025 
1026 typedef enum arp_input_next_t_
1027 {
1032 
1033 static uword
1035 {
1036  u32 n_left_from, next_index, *from, *to_next, n_left_to_next;
1038 
1039  from = vlib_frame_vector_args (frame);
1040  n_left_from = frame->n_vectors;
1041  next_index = node->cached_next_index;
1042 
1043  if (node->flags & VLIB_NODE_FLAG_TRACE)
1044  vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors,
1045  /* stride */ 1,
1046  sizeof (ethernet_arp_input_trace_t));
1047 
1048  while (n_left_from > 0)
1049  {
1050  vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1051 
1052  while (n_left_from > 0 && n_left_to_next > 0)
1053  {
1054  const ethernet_arp_header_t *arp0;
1055  arp_input_next_t next0;
1056  vlib_buffer_t *p0;
1057  u32 pi0, error0;
1058 
1059  pi0 = to_next[0] = from[0];
1060  from += 1;
1061  to_next += 1;
1062  n_left_from -= 1;
1063  n_left_to_next -= 1;
1064 
1065  p0 = vlib_get_buffer (vm, pi0);
1066  arp0 = vlib_buffer_get_current (p0);
1067 
1068  error0 = ETHERNET_ARP_ERROR_replies_sent;
1069  next0 = ARP_INPUT_NEXT_DROP;
1070 
1071  error0 =
1072  (arp0->l2_type !=
1073  clib_net_to_host_u16 (ETHERNET_ARP_HARDWARE_TYPE_ethernet) ?
1074  ETHERNET_ARP_ERROR_l2_type_not_ethernet : error0);
1075  error0 =
1076  (arp0->l3_type !=
1077  clib_net_to_host_u16 (ETHERNET_TYPE_IP4) ?
1078  ETHERNET_ARP_ERROR_l3_type_not_ip4 : error0);
1079  error0 =
1080  (0 == arp0->ip4_over_ethernet[0].ip4.as_u32 ?
1081  ETHERNET_ARP_ERROR_l3_dst_address_unset : error0);
1082 
1083  if (ETHERNET_ARP_ERROR_replies_sent == error0)
1084  {
1085  next0 = ARP_INPUT_NEXT_DISABLED;
1088  &next0, p0);
1089  }
1090  else
1091  p0->error = node->errors[error0];
1092 
1093  vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
1094  n_left_to_next, pi0, next0);
1095  }
1096 
1097  vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1098  }
1099 
1100  return frame->n_vectors;
1101 }
1102 
1104 {
1108 
1109 #define foreach_arp_disabled_error \
1110  _ (DISABLED, "ARP Disabled on this interface") \
1111 
1112 typedef enum
1113 {
1114 #define _(sym,string) ARP_DISABLED_ERROR_##sym,
1116 #undef _
1119 
1120 static char *arp_disabled_error_strings[] = {
1121 #define _(sym,string) string,
1123 #undef _
1124 };
1125 
1126 static uword
1128  vlib_node_runtime_t * node, vlib_frame_t * frame)
1129 {
1130  u32 n_left_from, next_index, *from, *to_next, n_left_to_next;
1131 
1132  from = vlib_frame_vector_args (frame);
1133  n_left_from = frame->n_vectors;
1134  next_index = node->cached_next_index;
1135 
1136  if (node->flags & VLIB_NODE_FLAG_TRACE)
1137  vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors,
1138  /* stride */ 1,
1139  sizeof (ethernet_arp_input_trace_t));
1140 
1141  while (n_left_from > 0)
1142  {
1143  vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1144 
1145  while (n_left_from > 0 && n_left_to_next > 0)
1146  {
1148  vlib_buffer_t *p0;
1149  u32 pi0, error0;
1150 
1151  next0 = ARP_DISABLED_NEXT_DROP;
1152  error0 = ARP_DISABLED_ERROR_DISABLED;
1153 
1154  pi0 = to_next[0] = from[0];
1155  from += 1;
1156  to_next += 1;
1157  n_left_from -= 1;
1158  n_left_to_next -= 1;
1159 
1160  p0 = vlib_get_buffer (vm, pi0);
1161  p0->error = node->errors[error0];
1162 
1163  vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
1164  n_left_to_next, pi0, next0);
1165  }
1166 
1167  vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1168  }
1169 
1170  return frame->n_vectors;
1171 }
1172 
1175  vlib_buffer_t * p0,
1176  u32 sw_if_index0,
1177  const ip4_address_t * if_addr0,
1178  ethernet_arp_header_t * arp0, ethernet_header_t * eth_rx)
1179 {
1180  vnet_hw_interface_t *hw_if0;
1181  u8 *rewrite0, rewrite0_len;
1182  ethernet_header_t *eth_tx;
1183  u32 next0;
1184 
1185  /* Send a reply.
1186  An adjacency to the sender is not always present,
1187  so we use the interface to build us a rewrite string
1188  which will contain all the necessary tags. */
1189  rewrite0 = ethernet_build_rewrite (vnm, sw_if_index0,
1190  VNET_LINK_ARP, eth_rx->src_address);
1191  rewrite0_len = vec_len (rewrite0);
1192 
1193  /* Figure out how much to rewind current data from adjacency. */
1194  vlib_buffer_advance (p0, -rewrite0_len);
1195  eth_tx = vlib_buffer_get_current (p0);
1196 
1197  vnet_buffer (p0)->sw_if_index[VLIB_TX] = sw_if_index0;
1198  hw_if0 = vnet_get_sup_hw_interface (vnm, sw_if_index0);
1199 
1200  /* Send reply back through input interface */
1201  vnet_buffer (p0)->sw_if_index[VLIB_TX] = sw_if_index0;
1202  next0 = ARP_REPLY_NEXT_REPLY_TX;
1203 
1204  arp0->opcode = clib_host_to_net_u16 (ETHERNET_ARP_OPCODE_reply);
1205 
1206  arp0->ip4_over_ethernet[1] = arp0->ip4_over_ethernet[0];
1207 
1209  hw_if0->hw_address);
1210  clib_mem_unaligned (&arp0->ip4_over_ethernet[0].ip4.data_u32, u32) =
1211  if_addr0->data_u32;
1212 
1213  /* Hardware must be ethernet-like. */
1214  ASSERT (vec_len (hw_if0->hw_address) == 6);
1215 
1216  /* the rx nd tx ethernet headers wil overlap in the case
1217  * when we received a tagged VLAN=0 packet, but we are sending
1218  * back untagged */
1219  clib_memcpy_fast (eth_tx, rewrite0, vec_len (rewrite0));
1220  vec_free (rewrite0);
1221 
1222  return (next0);
1223 }
1224 
1226 {
1230 };
1231 
1232 /*
1233  * we're looking for FIB sources that indicate the destination
1234  * is attached. There may be interposed DPO prior to the one
1235  * we are looking for
1236  */
1237 static enum arp_dst_fib_type
1239 {
1240  const fib_entry_t *entry = fib_entry_get (fei);
1241  const fib_entry_src_t *entry_src;
1242  fib_source_t src;
1243  /* *INDENT-OFF* */
1244  FOR_EACH_SRC_ADDED(entry, entry_src, src,
1245  ({
1246  *flags = fib_entry_get_flags_for_source (fei, src);
1248  return ARP_DST_FIB_ADJ;
1249  else if (FIB_ENTRY_FLAG_CONNECTED & *flags)
1250  return ARP_DST_FIB_CONN;
1251  }))
1252  /* *INDENT-ON* */
1253 
1254  return ARP_DST_FIB_NONE;
1255 }
1256 
1257 static uword
1259 {
1261  vnet_main_t *vnm = vnet_get_main ();
1262  u32 n_left_from, next_index, *from, *to_next;
1263  u32 n_replies_sent = 0;
1264 
1265  from = vlib_frame_vector_args (frame);
1266  n_left_from = frame->n_vectors;
1267  next_index = node->cached_next_index;
1268 
1269  if (node->flags & VLIB_NODE_FLAG_TRACE)
1270  vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors,
1271  /* stride */ 1,
1272  sizeof (ethernet_arp_input_trace_t));
1273 
1274  while (n_left_from > 0)
1275  {
1276  u32 n_left_to_next;
1277 
1278  vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1279 
1280  while (n_left_from > 0 && n_left_to_next > 0)
1281  {
1282  vlib_buffer_t *p0;
1283  ethernet_arp_header_t *arp0;
1284  ethernet_header_t *eth_rx;
1285  const ip4_address_t *if_addr0;
1286  u32 pi0, error0, next0, sw_if_index0, conn_sw_if_index0, fib_index0;
1287  u8 dst_is_local0, is_vrrp_reply0;
1288  fib_node_index_t dst_fei, src_fei;
1289  const fib_prefix_t *pfx0;
1290  fib_entry_flag_t src_flags, dst_flags;
1291 
1292  pi0 = from[0];
1293  to_next[0] = pi0;
1294  from += 1;
1295  to_next += 1;
1296  n_left_from -= 1;
1297  n_left_to_next -= 1;
1298 
1299  p0 = vlib_get_buffer (vm, pi0);
1300  arp0 = vlib_buffer_get_current (p0);
1301  /* Fill in ethernet header. */
1302  eth_rx = ethernet_buffer_get_header (p0);
1303 
1304  next0 = ARP_REPLY_NEXT_DROP;
1305  error0 = ETHERNET_ARP_ERROR_replies_sent;
1306  sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
1307 
1308  /* Check that IP address is local and matches incoming interface. */
1309  fib_index0 = ip4_fib_table_get_index_for_sw_if_index (sw_if_index0);
1310  if (~0 == fib_index0)
1311  {
1312  error0 = ETHERNET_ARP_ERROR_interface_no_table;
1313  goto drop;
1314 
1315  }
1316 
1317  {
1318  /*
1319  * we're looking for FIB entries that indicate the source
1320  * is attached. There may be more specific non-attached
1321  * routes that match the source, but these do not influence
1322  * whether we respond to an ARP request, i.e. they do not
1323  * influence whether we are the correct way for the sender
1324  * to reach us, they only affect how we reach the sender.
1325  */
1326  fib_entry_t *src_fib_entry;
1327  const fib_prefix_t *pfx;
1329  fib_source_t source;
1330  int attached;
1331  int mask;
1332 
1333  mask = 32;
1334  attached = 0;
1335 
1336  do
1337  {
1338  src_fei = ip4_fib_table_lookup (ip4_fib_get (fib_index0),
1339  &arp0->
1340  ip4_over_ethernet[0].ip4,
1341  mask);
1342  src_fib_entry = fib_entry_get (src_fei);
1343 
1344  /*
1345  * It's possible that the source that provides the
1346  * flags we need, or the flags we must not have,
1347  * is not the best source, so check then all.
1348  */
1349  /* *INDENT-OFF* */
1350  FOR_EACH_SRC_ADDED(src_fib_entry, src, source,
1351  ({
1352  src_flags = fib_entry_get_flags_for_source (src_fei, source);
1353 
1354  /* Reject requests/replies with our local interface
1355  address. */
1356  if (FIB_ENTRY_FLAG_LOCAL & src_flags)
1357  {
1358  error0 = ETHERNET_ARP_ERROR_l3_src_address_is_local;
1359  /*
1360  * When VPP has an interface whose address is also
1361  * applied to a TAP interface on the host, then VPP's
1362  * TAP interface will be unnumbered to the 'real'
1363  * interface and do proxy ARP from the host.
1364  * The curious aspect of this setup is that ARP requests
1365  * from the host will come from the VPP's own address.
1366  * So don't drop immediately here, instead go see if this
1367  * is a proxy ARP case.
1368  */
1369  goto next_feature;
1370  }
1371  /* A Source must also be local to subnet of matching
1372  * interface address. */
1373  if ((FIB_ENTRY_FLAG_ATTACHED & src_flags) ||
1374  (FIB_ENTRY_FLAG_CONNECTED & src_flags))
1375  {
1376  attached = 1;
1377  break;
1378  }
1379  /*
1380  * else
1381  * The packet was sent from an address that is not
1382  * connected nor attached i.e. it is not from an
1383  * address that is covered by a link's sub-net,
1384  * nor is it a already learned host resp.
1385  */
1386  }));
1387  /* *INDENT-ON* */
1388 
1389  /*
1390  * shorter mask lookup for the next iteration.
1391  */
1392  pfx = fib_entry_get_prefix (src_fei);
1393  mask = pfx->fp_len - 1;
1394 
1395  /*
1396  * continue until we hit the default route or we find
1397  * the attached we are looking for. The most likely
1398  * outcome is we find the attached with the first source
1399  * on the first lookup.
1400  */
1401  }
1402  while (!attached &&
1404 
1405  if (!attached)
1406  {
1407  /*
1408  * the matching route is a not attached, i.e. it was
1409  * added as a result of routing, rather than interface/ARP
1410  * configuration. If the matching route is not a host route
1411  * (i.e. a /32)
1412  */
1413  error0 = ETHERNET_ARP_ERROR_l3_src_address_not_local;
1414  goto drop;
1415  }
1416  }
1417 
1418  dst_fei = ip4_fib_table_lookup (ip4_fib_get (fib_index0),
1419  &arp0->ip4_over_ethernet[1].ip4,
1420  32);
1421  switch (arp_dst_fib_check (dst_fei, &dst_flags))
1422  {
1423  case ARP_DST_FIB_ADJ:
1424  /*
1425  * We matched an adj-fib on ths source subnet (a /32 previously
1426  * added as a result of ARP). If this request is a gratuitous
1427  * ARP, then learn from it.
1428  * The check for matching an adj-fib, is to prevent hosts
1429  * from spamming us with gratuitous ARPS that might otherwise
1430  * blow our ARP cache
1431  */
1432  if (arp0->ip4_over_ethernet[0].ip4.as_u32 ==
1433  arp0->ip4_over_ethernet[1].ip4.as_u32)
1434  error0 = arp_learn (vnm, am, sw_if_index0,
1435  &arp0->ip4_over_ethernet[0]);
1436  goto drop;
1437  case ARP_DST_FIB_CONN:
1438  /* destination is connected, continue to process */
1439  break;
1440  case ARP_DST_FIB_NONE:
1441  /* destination is not connected, stop here */
1442  error0 = ETHERNET_ARP_ERROR_l3_dst_address_not_local;
1443  goto next_feature;
1444  }
1445 
1446  dst_is_local0 = (FIB_ENTRY_FLAG_LOCAL & dst_flags);
1447  pfx0 = fib_entry_get_prefix (dst_fei);
1448  if_addr0 = &pfx0->fp_addr.ip4;
1449 
1450  is_vrrp_reply0 =
1451  ((arp0->opcode ==
1452  clib_host_to_net_u16 (ETHERNET_ARP_OPCODE_reply))
1453  &&
1454  (!memcmp
1455  (arp0->ip4_over_ethernet[0].mac.bytes, vrrp_prefix,
1456  sizeof (vrrp_prefix))));
1457 
1458  /* Trash ARP packets whose ARP-level source addresses do not
1459  match their L2-frame-level source addresses, unless it's
1460  a reply from a VRRP virtual router */
1462  (eth_rx->src_address,
1463  arp0->ip4_over_ethernet[0].mac.bytes) && !is_vrrp_reply0)
1464  {
1465  error0 = ETHERNET_ARP_ERROR_l2_address_mismatch;
1466  goto drop;
1467  }
1468 
1469  /* Learn or update sender's mapping only for replies to addresses
1470  * that are local to the subnet */
1471  if (arp0->opcode ==
1472  clib_host_to_net_u16 (ETHERNET_ARP_OPCODE_reply))
1473  {
1474  if (dst_is_local0)
1475  error0 = arp_learn (vnm, am, sw_if_index0,
1476  &arp0->ip4_over_ethernet[0]);
1477  else
1478  /* a reply for a non-local destination could be a GARP.
1479  * GARPs for hosts we know were handled above, so this one
1480  * we drop */
1481  error0 = ETHERNET_ARP_ERROR_l3_dst_address_not_local;
1482 
1483  goto next_feature;
1484  }
1485  else if (arp0->opcode ==
1486  clib_host_to_net_u16 (ETHERNET_ARP_OPCODE_request) &&
1487  (dst_is_local0 == 0))
1488  {
1489  goto next_feature;
1490  }
1491 
1492  /* Honor unnumbered interface, if any */
1493  conn_sw_if_index0 = fib_entry_get_resolving_interface (dst_fei);
1494  if (sw_if_index0 != conn_sw_if_index0 ||
1495  sw_if_index0 != fib_entry_get_resolving_interface (src_fei))
1496  {
1497  /*
1498  * The interface the ARP is sent to or was received on is not the
1499  * interface on which the covering prefix is configured.
1500  * Maybe this is a case for unnumbered.
1501  */
1502  if (!arp_unnumbered (p0, sw_if_index0, conn_sw_if_index0))
1503  {
1504  error0 = ETHERNET_ARP_ERROR_unnumbered_mismatch;
1505  goto drop;
1506  }
1507  }
1508  if (arp0->ip4_over_ethernet[0].ip4.as_u32 ==
1509  arp0->ip4_over_ethernet[1].ip4.as_u32)
1510  {
1511  error0 = ETHERNET_ARP_ERROR_gratuitous_arp;
1512  goto drop;
1513  }
1514 
1515  next0 = arp_mk_reply (vnm, p0, sw_if_index0,
1516  if_addr0, arp0, eth_rx);
1517 
1518  /* We are going to reply to this request, so, in the absence of
1519  errors, learn the sender */
1520  if (!error0)
1521  error0 = arp_learn (vnm, am, sw_if_index0,
1522  &arp0->ip4_over_ethernet[1]);
1523 
1524  n_replies_sent += 1;
1525  goto enqueue;
1526 
1527  next_feature:
1528  vnet_feature_next (&next0, p0);
1529  goto enqueue;
1530 
1531  drop:
1532  p0->error = node->errors[error0];
1533 
1534  enqueue:
1535  vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
1536  n_left_to_next, pi0, next0);
1537  }
1538 
1539  vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1540  }
1541 
1542  vlib_error_count (vm, node->node_index,
1543  ETHERNET_ARP_ERROR_replies_sent, n_replies_sent);
1544 
1545  return frame->n_vectors;
1546 }
1547 
1548 static uword
1550 {
1552  vnet_main_t *vnm = vnet_get_main ();
1553  u32 n_left_from, next_index, *from, *to_next;
1554  u32 n_arp_replies_sent = 0;
1555 
1556  from = vlib_frame_vector_args (frame);
1557  n_left_from = frame->n_vectors;
1558  next_index = node->cached_next_index;
1559 
1560  if (node->flags & VLIB_NODE_FLAG_TRACE)
1561  vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors,
1562  /* stride */ 1,
1563  sizeof (ethernet_arp_input_trace_t));
1564 
1565  while (n_left_from > 0)
1566  {
1567  u32 n_left_to_next;
1568 
1569  vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1570 
1571  while (n_left_from > 0 && n_left_to_next > 0)
1572  {
1573  vlib_buffer_t *p0;
1574  ethernet_arp_header_t *arp0;
1575  ethernet_header_t *eth_rx;
1576  ip4_address_t proxy_src;
1577  u32 pi0, error0, next0, sw_if_index0, fib_index0;
1578  u8 is_request0;
1580 
1581  pi0 = from[0];
1582  to_next[0] = pi0;
1583  from += 1;
1584  to_next += 1;
1585  n_left_from -= 1;
1586  n_left_to_next -= 1;
1587 
1588  p0 = vlib_get_buffer (vm, pi0);
1589  arp0 = vlib_buffer_get_current (p0);
1590  /* Fill in ethernet header. */
1591  eth_rx = ethernet_buffer_get_header (p0);
1592 
1593  is_request0 = arp0->opcode
1594  == clib_host_to_net_u16 (ETHERNET_ARP_OPCODE_request);
1595 
1596  error0 = ETHERNET_ARP_ERROR_replies_sent;
1597  sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
1598  next0 = ARP_REPLY_NEXT_DROP;
1599 
1600  fib_index0 = ip4_fib_table_get_index_for_sw_if_index (sw_if_index0);
1601  if (~0 == fib_index0)
1602  {
1603  error0 = ETHERNET_ARP_ERROR_interface_no_table;
1604  }
1605 
1606  if (0 == error0 && is_request0)
1607  {
1608  u32 this_addr = clib_net_to_host_u32
1609  (arp0->ip4_over_ethernet[1].ip4.as_u32);
1610 
1611  vec_foreach (pa, am->proxy_arps)
1612  {
1613  u32 lo_addr = clib_net_to_host_u32 (pa->lo_addr.as_u32);
1614  u32 hi_addr = clib_net_to_host_u32 (pa->hi_addr.as_u32);
1615 
1616  /* an ARP request hit in the proxy-arp table? */
1617  if ((this_addr >= lo_addr && this_addr <= hi_addr) &&
1618  (fib_index0 == pa->fib_index))
1619  {
1620  proxy_src.as_u32 =
1621  arp0->ip4_over_ethernet[1].ip4.data_u32;
1622 
1623  /*
1624  * change the interface address to the proxied
1625  */
1626  n_arp_replies_sent++;
1627 
1628  next0 =
1629  arp_mk_reply (vnm, p0, sw_if_index0, &proxy_src, arp0,
1630  eth_rx);
1631  }
1632  }
1633  }
1634  else
1635  {
1636  p0->error = node->errors[error0];
1637  }
1638 
1639  vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
1640  n_left_to_next, pi0, next0);
1641  }
1642 
1643  vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1644  }
1645 
1646  vlib_error_count (vm, node->node_index,
1647  ETHERNET_ARP_ERROR_replies_sent, n_arp_replies_sent);
1648 
1649  return frame->n_vectors;
1650 }
1651 
1652 static char *ethernet_arp_error_strings[] = {
1653 #define _(sym,string) string,
1655 #undef _
1656 };
1657 
1658 /* *INDENT-OFF* */
1659 
1661 {
1662  .function = arp_input,
1663  .name = "arp-input",
1664  .vector_size = sizeof (u32),
1665  .n_errors = ETHERNET_ARP_N_ERROR,
1666  .error_strings = ethernet_arp_error_strings,
1667  .n_next_nodes = ARP_INPUT_N_NEXT,
1668  .next_nodes = {
1669  [ARP_INPUT_NEXT_DROP] = "error-drop",
1670  [ARP_INPUT_NEXT_DISABLED] = "arp-disabled",
1671  },
1672  .format_buffer = format_ethernet_arp_header,
1673  .format_trace = format_ethernet_arp_input_trace,
1674 };
1675 
1677 {
1678  .function = arp_disabled,
1679  .name = "arp-disabled",
1680  .vector_size = sizeof (u32),
1681  .n_errors = ARP_DISABLED_N_ERROR,
1682  .error_strings = arp_disabled_error_strings,
1683  .n_next_nodes = ARP_DISABLED_N_NEXT,
1684  .next_nodes = {
1685  [ARP_INPUT_NEXT_DROP] = "error-drop",
1686  },
1687  .format_buffer = format_ethernet_arp_header,
1688  .format_trace = format_ethernet_arp_input_trace,
1689 };
1690 
1692 {
1693  .function = arp_reply,
1694  .name = "arp-reply",
1695  .vector_size = sizeof (u32),
1696  .n_errors = ETHERNET_ARP_N_ERROR,
1697  .error_strings = ethernet_arp_error_strings,
1698  .n_next_nodes = ARP_REPLY_N_NEXT,
1699  .next_nodes = {
1700  [ARP_REPLY_NEXT_DROP] = "error-drop",
1701  [ARP_REPLY_NEXT_REPLY_TX] = "interface-output",
1702  },
1703  .format_buffer = format_ethernet_arp_header,
1704  .format_trace = format_ethernet_arp_input_trace,
1705 };
1706 
1708 {
1709  .function = arp_proxy,
1710  .name = "arp-proxy",
1711  .vector_size = sizeof (u32),
1712  .n_errors = ETHERNET_ARP_N_ERROR,
1713  .error_strings = ethernet_arp_error_strings,
1714  .n_next_nodes = ARP_REPLY_N_NEXT,
1715  .next_nodes = {
1716  [ARP_REPLY_NEXT_DROP] = "error-drop",
1717  [ARP_REPLY_NEXT_REPLY_TX] = "interface-output",
1718  },
1719  .format_buffer = format_ethernet_arp_header,
1720  .format_trace = format_ethernet_arp_input_trace,
1721 };
1722 
1723 /* Built-in ARP rx feature path definition */
1724 VNET_FEATURE_ARC_INIT (arp_feat, static) =
1725 {
1726  .arc_name = "arp",
1727  .start_nodes = VNET_FEATURES ("arp-input"),
1728  .last_in_arc = "error-drop",
1729  .arc_index_ptr = &ethernet_arp_main.feature_arc_index,
1730 };
1731 
1732 VNET_FEATURE_INIT (arp_reply_feat_node, static) =
1733 {
1734  .arc_name = "arp",
1735  .node_name = "arp-reply",
1736  .runs_before = VNET_FEATURES ("arp-disabled"),
1737 };
1738 
1739 VNET_FEATURE_INIT (arp_proxy_feat_node, static) =
1740 {
1741  .arc_name = "arp",
1742  .node_name = "arp-proxy",
1743  .runs_after = VNET_FEATURES ("arp-reply"),
1744  .runs_before = VNET_FEATURES ("arp-disabled"),
1745 };
1746 
1747 VNET_FEATURE_INIT (arp_disabled_feat_node, static) =
1748 {
1749  .arc_name = "arp",
1750  .node_name = "arp-disabled",
1751  .runs_before = VNET_FEATURES ("error-drop"),
1752 };
1753 
1754 VNET_FEATURE_INIT (arp_drop_feat_node, static) =
1755 {
1756  .arc_name = "arp",
1757  .node_name = "error-drop",
1758  .runs_before = 0, /* last feature */
1759 };
1760 
1761 /* *INDENT-ON* */
1762 
1763 static int
1764 ip4_arp_entry_sort (void *a1, void *a2)
1765 {
1766  ethernet_arp_ip4_entry_t *e1 = a1;
1767  ethernet_arp_ip4_entry_t *e2 = a2;
1768 
1769  int cmp;
1770  vnet_main_t *vnm = vnet_get_main ();
1771 
1772  cmp = vnet_sw_interface_compare (vnm, e1->sw_if_index, e2->sw_if_index);
1773  if (!cmp)
1774  cmp = ip4_address_compare (&e1->ip4_address, &e2->ip4_address);
1775  return cmp;
1776 }
1777 
1780 {
1782  return am->ip4_entry_pool;
1783 }
1784 
1787 {
1789  ethernet_arp_ip4_entry_t *n, *ns = 0;
1790 
1791  /* *INDENT-OFF* */
1792  pool_foreach (n, am->ip4_entry_pool, ({
1793  if (sw_if_index != ~0 && n->sw_if_index != sw_if_index)
1794  continue;
1795  vec_add1 (ns, n[0]);
1796  }));
1797  /* *INDENT-ON* */
1798 
1799  if (ns)
1801  return ns;
1802 }
1803 
1804 static clib_error_t *
1806  unformat_input_t * input, vlib_cli_command_t * cmd)
1807 {
1808  vnet_main_t *vnm = vnet_get_main ();
1810  ethernet_arp_ip4_entry_t *e, *es;
1812  clib_error_t *error = 0;
1813  u32 sw_if_index;
1814 
1815  /* Filter entries by interface if given. */
1816  sw_if_index = ~0;
1817  (void) unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index);
1818 
1819  es = ip4_neighbor_entries (sw_if_index);
1820  if (es)
1821  {
1822  vlib_cli_output (vm, "%U", format_ethernet_arp_ip4_entry, vnm, 0);
1823  vec_foreach (e, es)
1824  {
1825  vlib_cli_output (vm, "%U", format_ethernet_arp_ip4_entry, vnm, e);
1826  }
1827  vec_free (es);
1828  }
1829 
1830  if (vec_len (am->proxy_arps))
1831  {
1832  vlib_cli_output (vm, "Proxy arps enabled for:");
1833  vec_foreach (pa, am->proxy_arps)
1834  {
1835  vlib_cli_output (vm, "Fib_index %d %U - %U ",
1836  pa->fib_index,
1838  format_ip4_address, &pa->hi_addr);
1839  }
1840  }
1841 
1842  return error;
1843 }
1844 
1845 /*?
1846  * Display all the IPv4 ARP entries.
1847  *
1848  * @cliexpar
1849  * Example of how to display the IPv4 ARP table:
1850  * @cliexstart{show ip arp}
1851  * Time FIB IP4 Flags Ethernet Interface
1852  * 346.3028 0 6.1.1.3 de:ad:be:ef:ba:be GigabitEthernet2/0/0
1853  * 3077.4271 0 6.1.1.4 S de:ad:be:ef:ff:ff GigabitEthernet2/0/0
1854  * 2998.6409 1 6.2.2.3 de:ad:be:ef:00:01 GigabitEthernet2/0/0
1855  * Proxy arps enabled for:
1856  * Fib_index 0 6.0.0.1 - 6.0.0.11
1857  * @cliexend
1858  ?*/
1859 /* *INDENT-OFF* */
1860 VLIB_CLI_COMMAND (show_ip4_arp_command, static) = {
1861  .path = "show ip arp",
1862  .function = show_ip4_arp,
1863  .short_help = "show ip arp",
1864 };
1865 /* *INDENT-ON* */
1866 
1867 typedef struct
1868 {
1869  pg_edit_t l2_type, l3_type;
1870  pg_edit_t n_l2_address_bytes, n_l3_address_bytes;
1872  struct
1873  {
1876  } ip4_over_ethernet[2];
1878 
1879 static inline void
1881 {
1882  /* Initialize fields that are not bit fields in the IP header. */
1883 #define _(f) pg_edit_init (&p->f, ethernet_arp_header_t, f);
1884  _(l2_type);
1885  _(l3_type);
1886  _(n_l2_address_bytes);
1887  _(n_l3_address_bytes);
1888  _(opcode);
1889  _(ip4_over_ethernet[0].mac);
1890  _(ip4_over_ethernet[0].ip4);
1891  _(ip4_over_ethernet[1].mac);
1892  _(ip4_over_ethernet[1].ip4);
1893 #undef _
1894 }
1895 
1896 uword
1897 unformat_pg_arp_header (unformat_input_t * input, va_list * args)
1898 {
1899  pg_stream_t *s = va_arg (*args, pg_stream_t *);
1901  u32 group_index;
1902 
1903  p = pg_create_edit_group (s, sizeof (p[0]), sizeof (ethernet_arp_header_t),
1904  &group_index);
1906 
1907  /* Defaults. */
1908  pg_edit_set_fixed (&p->l2_type, ETHERNET_ARP_HARDWARE_TYPE_ethernet);
1909  pg_edit_set_fixed (&p->l3_type, ETHERNET_TYPE_IP4);
1912 
1913  if (!unformat (input, "%U: %U/%U -> %U/%U",
1924  {
1925  /* Free up any edits we may have added. */
1926  pg_free_edit_group (s);
1927  return 0;
1928  }
1929  return 1;
1930 }
1931 
1932 clib_error_t *
1934 {
1936 
1937  am->limit_arp_cache_size = arp_limit;
1938  return 0;
1939 }
1940 
1941 /**
1942  * @brief Control Plane hook to remove an ARP entry
1943  */
1944 int
1946  u32 sw_if_index,
1947  const
1948  ethernet_arp_ip4_over_ethernet_address_t *
1949  a)
1950 {
1953  .flags = ETHERNET_ARP_ARGS_REMOVE,
1954  .ip4 = a->ip4,
1955  .mac = a->mac,
1956  };
1957 
1959  (u8 *) & args, sizeof (args));
1960  return 0;
1961 }
1962 
1963 /**
1964  * @brief publish wildcard arp event
1965  * @param sw_if_index The interface on which the ARP entries are acted
1966  */
1967 static int
1969  const ethernet_arp_ip4_over_ethernet_address_t * a)
1970 {
1973  .sw_if_index = sw_if_index,
1974  .ip4 = a->ip4,
1975  .mac = a->mac,
1976  };
1977 
1979  (u8 *) & args, sizeof (args));
1980  return 0;
1981 }
1982 
1983 static void
1986  args)
1987 {
1991  uword et = am->wc_ip4_arp_publisher_et;
1992 
1993  if (ni == (uword) ~ 0)
1994  return;
1995  wc_arp_report_t *r =
1996  vlib_process_signal_event_data (vm, ni, et, 1, sizeof *r);
1997  r->ip.as_u32 = args->ip4.as_u32;
1998  r->sw_if_index = args->sw_if_index;
1999  mac_address_copy (&r->mac, &args->mac);
2000 }
2001 
2002 void
2003 wc_arp_set_publisher_node (uword node_index, uword event_type)
2004 {
2006  am->wc_ip4_arp_publisher_node = node_index;
2007  am->wc_ip4_arp_publisher_et = event_type;
2008 }
2009 
2010 static void
2012 
2013 static int
2016  * args)
2017 {
2021 
2022  if (vec_len (am->ethernet_arp_by_sw_if_index) <= args->sw_if_index)
2023  return 0;
2024 
2025  eai = &am->ethernet_arp_by_sw_if_index[args->sw_if_index];
2026 
2027  e = arp_entry_find (eai, &args->ip4);
2028 
2029  if (NULL != e)
2030  {
2033 
2034  /*
2035  * The difference between flush and unset, is that an unset
2036  * means delete for static and dynamic entries. A flush
2037  * means delete only for dynamic. Flushing is what the DP
2038  * does in response to interface events. unset is only done
2039  * by the control plane.
2040  */
2041  if (e->flags & IP_NEIGHBOR_FLAG_STATIC)
2042  {
2044  }
2045  else if (e->flags & IP_NEIGHBOR_FLAG_DYNAMIC)
2046  {
2047  arp_entry_free (eai, e);
2048  }
2049  }
2050  return (0);
2051 }
2052 
2053 /*
2054  * arp_add_del_interface_address
2055  *
2056  * callback when an interface address is added or deleted
2057  */
2058 static void
2060  uword opaque, u32 sw_if_index, u32 is_enable)
2061 {
2063 
2064  if (is_enable)
2065  arp_enable (am, sw_if_index);
2066  else
2067  arp_disable (am, sw_if_index);
2068 }
2069 
2070 /*
2071  * arp_add_del_interface_address
2072  *
2073  * callback when an interface address is added or deleted
2074  */
2075 static void
2077  uword opaque,
2078  u32 sw_if_index,
2080  u32 address_length,
2081  u32 if_address_index, u32 is_del)
2082 {
2083  /*
2084  * Flush the ARP cache of all entries covered by the address
2085  * that is being removed.
2086  */
2089 
2090  if (vec_len (am->ethernet_arp_by_sw_if_index) <= sw_if_index)
2091  return;
2092 
2093  if (is_del)
2094  {
2096  u32 i, *to_delete = 0;
2097  hash_pair_t *pair;
2098 
2100 
2101  /* *INDENT-OFF* */
2102  hash_foreach_pair (pair, eai->arp_entries,
2103  ({
2104  e = pool_elt_at_index(am->ip4_entry_pool,
2105  pair->value[0]);
2106  if (ip4_destination_matches_route (im, &e->ip4_address,
2107  address, address_length))
2108  {
2109  vec_add1 (to_delete, e - am->ip4_entry_pool);
2110  }
2111  }));
2112  /* *INDENT-ON* */
2113 
2114  for (i = 0; i < vec_len (to_delete); i++)
2115  {
2116  e = pool_elt_at_index (am->ip4_entry_pool, to_delete[i]);
2117 
2119  .ip4.as_u32 = e->ip4_address.as_u32,
2120  .sw_if_index = e->sw_if_index,
2121  .flags = ETHERNET_ARP_ARGS_FLUSH,
2122  };
2123  mac_address_copy (&delme.mac, &e->mac);
2124 
2126  &delme);
2127  }
2128 
2129  vec_free (to_delete);
2130  }
2131 }
2132 
2133 static void
2135  uword opaque,
2136  u32 sw_if_index, u32 new_fib_index, u32 old_fib_index)
2137 {
2141  hash_pair_t *pair;
2142 
2143  /*
2144  * the IP table that the interface is bound to has changed.
2145  * reinstall all the adj fibs.
2146  */
2147 
2148  if (vec_len (am->ethernet_arp_by_sw_if_index) <= sw_if_index)
2149  return;
2150 
2152 
2153  /* *INDENT-OFF* */
2154  hash_foreach_pair (pair, eai->arp_entries,
2155  ({
2156  e = pool_elt_at_index(am->ip4_entry_pool,
2157  pair->value[0]);
2158  /*
2159  * remove the adj-fib from the old table and add to the new
2160  */
2161  arp_adj_fib_remove(e, old_fib_index);
2162  arp_adj_fib_add(e, new_fib_index);
2163  }));
2164  /* *INDENT-ON* */
2165 
2166 }
2167 
2168 static clib_error_t *
2170 {
2172  ip4_main_t *im = &ip4_main;
2173  pg_node_t *pn;
2174 
2175  ethernet_register_input_type (vm, ETHERNET_TYPE_ARP, arp_input_node.index);
2176 
2177  pn = pg_get_node (arp_input_node.index);
2179 
2180  am->opcode_by_name = hash_create_string (0, sizeof (uword));
2181 #define _(o) hash_set_mem (am->opcode_by_name, #o, ETHERNET_ARP_OPCODE_##o);
2183 #undef _
2184 
2185  /* $$$ configurable */
2186  am->limit_arp_cache_size = 50000;
2187 
2188  am->pending_resolutions_by_address = hash_create (0, sizeof (uword));
2189  am->mac_changes_by_address = hash_create (0, sizeof (uword));
2190  am->wc_ip4_arp_publisher_node = (uword) ~ 0;
2191 
2192  /* don't trace ARP error packets */
2193  {
2194  vlib_node_runtime_t *rt =
2196 
2197 #define _(a,b) \
2198  vnet_pcap_drop_trace_filter_add_del \
2199  (rt->errors[ETHERNET_ARP_ERROR_##a], \
2200  1 /* is_add */);
2202 #undef _
2203  }
2204 
2207  cb.function_opaque = 0;
2209 
2212  cbe.function_opaque = 0;
2214 
2216  cbt.function = arp_table_bind;
2217  cbt.function_opaque = 0;
2218  vec_add1 (im->table_bind_callbacks, cbt);
2219 
2220  return 0;
2221 }
2222 /* *INDENT-OFF* */
2224 {
2225  .runs_after = VLIB_INITS("ethernet_init"),
2226 };
2227 /* *INDENT-ON* */
2228 
2229 static void
2231 {
2233 
2237  pool_put (am->ip4_entry_pool, e);
2238 }
2239 
2240 static inline int
2243  * args)
2244 {
2248 
2249  if (vec_len (am->ethernet_arp_by_sw_if_index) <= args->sw_if_index)
2250  return 0;
2251 
2252  eai = &am->ethernet_arp_by_sw_if_index[args->sw_if_index];
2253 
2254  e = arp_entry_find (eai, &args->ip4);
2255 
2256  if (NULL != e)
2257  {
2260  arp_entry_free (eai, e);
2261  }
2262 
2263  return 0;
2264 }
2265 
2266 
2267 static int
2270  * args)
2271 {
2275 
2276  arp_enable (am, args->sw_if_index);
2277  eai = &am->ethernet_arp_by_sw_if_index[args->sw_if_index];
2278 
2279  e = arp_entry_find (eai, &args->ip4);
2280 
2281  if (NULL != e)
2282  {
2285  }
2286  return (0);
2287 }
2288 
2289 static void
2291  * a)
2292 {
2294  ASSERT (vlib_get_thread_index () == 0);
2295 
2298  else if (a->flags & ETHERNET_ARP_ARGS_FLUSH)
2300  else if (a->flags & ETHERNET_ARP_ARGS_POPULATE)
2302  else if (a->flags & ETHERNET_ARP_ARGS_WC_PUB)
2304  else
2306 }
2307 
2308 /**
2309  * @brief Invoked when the interface's admin state changes
2310  */
2311 static clib_error_t *
2314 {
2317  u32 i, *to_update = 0;
2318 
2319  /* *INDENT-OFF* */
2320  pool_foreach (e, am->ip4_entry_pool,
2321  ({
2322  if (e->sw_if_index == sw_if_index)
2323  vec_add1 (to_update,
2324  e - am->ip4_entry_pool);
2325  }));
2326  /* *INDENT-ON* */
2327 
2328  for (i = 0; i < vec_len (to_update); i++)
2329  {
2330  e = pool_elt_at_index (am->ip4_entry_pool, to_update[i]);
2331 
2333  .ip4.as_u32 = e->ip4_address.as_u32,
2334  .sw_if_index = e->sw_if_index,
2335  };
2336  mac_address_copy (&update_me.mac, &e->mac);
2337 
2338  if (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
2339  {
2340  update_me.flags = ETHERNET_ARP_ARGS_POPULATE;
2342  }
2343  else
2344  {
2345  update_me.flags = ETHERNET_ARP_ARGS_FLUSH;
2347  }
2348  }
2349  vec_free (to_update);
2350 
2351  return 0;
2352 }
2353 
2355 
2356 static void
2357 increment_ip4_and_mac_address (ethernet_arp_ip4_over_ethernet_address_t * a)
2358 {
2359  u8 old;
2360  int i;
2361 
2362  for (i = 3; i >= 0; i--)
2363  {
2364  old = a->ip4.as_u8[i];
2365  a->ip4.as_u8[i] += 1;
2366  if (old < a->ip4.as_u8[i])
2367  break;
2368  }
2369 
2370  for (i = 5; i >= 0; i--)
2371  {
2372  old = a->mac.bytes[i];
2373  a->mac.bytes[i] += 1;
2374  if (old < a->mac.bytes[i])
2375  break;
2376  }
2377 }
2378 
2379 int
2381  u32 sw_if_index,
2382  const ethernet_arp_ip4_over_ethernet_address_t
2384 {
2387  .nbr_flags = flags,
2388  .flags = 0,
2389  .ip4.as_u32 = a->ip4.as_u32,
2390  .mac = a->mac,
2391  };
2392 
2394  (u8 *) & args, sizeof (args));
2395  return 0;
2396 }
2397 
2398 void
2400 {
2403 
2404  vec_foreach (pa, am->proxy_arps)
2405  {
2406  if (!cb (&pa->lo_addr, &pa->hi_addr, pa->fib_index, data))
2407  break;
2408  }
2409 }
2410 
2411 int
2413 {
2416 
2417  vec_validate (am->ethernet_arp_by_sw_if_index, sw_if_index);
2418 
2420 
2421  if (enable)
2422  {
2423  if (!eai->proxy_enabled)
2424  {
2425  vnet_feature_enable_disable ("arp", "arp-proxy",
2426  sw_if_index, 1, NULL, 0);
2427  }
2428  eai->proxy_enabled = 1;
2429  }
2430  else
2431  {
2432  if (eai->proxy_enabled)
2433  {
2434  vnet_feature_enable_disable ("arp", "arp-proxy",
2435  sw_if_index, 0, NULL, 0);
2436  }
2437  eai->proxy_enabled = 0;
2438  }
2439 
2440  return (0);
2441 }
2442 
2443 int
2445  ip4_address_t * hi_addr, u32 fib_index, int is_del)
2446 {
2449  u32 found_at_index = ~0;
2450 
2451  vec_foreach (pa, am->proxy_arps)
2452  {
2453  if (pa->lo_addr.as_u32 == lo_addr->as_u32 &&
2454  pa->hi_addr.as_u32 == hi_addr->as_u32 && pa->fib_index == fib_index)
2455  {
2456  found_at_index = pa - am->proxy_arps;
2457  break;
2458  }
2459  }
2460 
2461  if (found_at_index != ~0)
2462  {
2463  /* Delete, otherwise it's already in the table */
2464  if (is_del)
2465  vec_delete (am->proxy_arps, 1, found_at_index);
2466  return 0;
2467  }
2468  /* delete, no such entry */
2469  if (is_del)
2470  return VNET_API_ERROR_NO_SUCH_ENTRY;
2471 
2472  /* add, not in table */
2473  vec_add2 (am->proxy_arps, pa, 1);
2474  pa->lo_addr.as_u32 = lo_addr->as_u32;
2475  pa->hi_addr.as_u32 = hi_addr->as_u32;
2476  pa->fib_index = fib_index;
2477  return 0;
2478 }
2479 
2480 void
2482 {
2485 
2487  {
2488  if (eai->proxy_enabled)
2489  cb (eai - am->ethernet_arp_by_sw_if_index, data);
2490  }
2491 }
2492 
2493 /*
2494  * Remove any proxy arp entries associated with the
2495  * specified fib.
2496  */
2497 int
2499 {
2502  u32 *entries_to_delete = 0;
2503  u32 fib_index;
2504  int i;
2505 
2506  fib_index = fib_table_find (FIB_PROTOCOL_IP4, fib_id);
2507  if (~0 == fib_index)
2508  return VNET_API_ERROR_NO_SUCH_ENTRY;
2509 
2510  vec_foreach (pa, am->proxy_arps)
2511  {
2512  if (pa->fib_index == fib_index)
2513  {
2514  vec_add1 (entries_to_delete, pa - am->proxy_arps);
2515  }
2516  }
2517 
2518  for (i = 0; i < vec_len (entries_to_delete); i++)
2519  {
2520  vec_delete (am->proxy_arps, 1, entries_to_delete[i]);
2521  }
2522 
2523  vec_free (entries_to_delete);
2524 
2525  return 0;
2526 }
2527 
2528 static clib_error_t *
2530  unformat_input_t * input, vlib_cli_command_t * cmd)
2531 {
2532  vnet_main_t *vnm = vnet_get_main ();
2533  u32 sw_if_index;
2534  ethernet_arp_ip4_over_ethernet_address_t lo_addr, hi_addr, addr;
2535  int addr_valid = 0;
2536  int is_del = 0;
2537  int count = 1;
2538  u32 fib_index = 0;
2539  u32 fib_id;
2540  int is_proxy = 0;
2542 
2543  flags = IP_NEIGHBOR_FLAG_NONE;
2544 
2545  while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
2546  {
2547  /* set ip arp TenGigE1/1/0/1 1.2.3.4 aa:bb:... or aabb.ccdd... */
2548  if (unformat (input, "%U %U %U",
2549  unformat_vnet_sw_interface, vnm, &sw_if_index,
2550  unformat_ip4_address, &addr.ip4,
2551  unformat_mac_address_t, &addr.mac))
2552  addr_valid = 1;
2553 
2554  else if (unformat (input, "delete") || unformat (input, "del"))
2555  is_del = 1;
2556 
2557  else if (unformat (input, "static"))
2558  flags |= IP_NEIGHBOR_FLAG_STATIC;
2559 
2560  else if (unformat (input, "no-fib-entry"))
2562 
2563  else if (unformat (input, "count %d", &count))
2564  ;
2565 
2566  else if (unformat (input, "fib-id %d", &fib_id))
2567  {
2568  fib_index = fib_table_find (FIB_PROTOCOL_IP4, fib_id);
2569 
2570  if (~0 == fib_index)
2571  return clib_error_return (0, "fib ID %d doesn't exist\n", fib_id);
2572  }
2573 
2574  else if (unformat (input, "proxy %U - %U",
2575  unformat_ip4_address, &lo_addr.ip4,
2576  unformat_ip4_address, &hi_addr.ip4))
2577  is_proxy = 1;
2578  else
2579  break;
2580  }
2581 
2582  if (is_proxy)
2583  {
2584  (void) vnet_proxy_arp_add_del (&lo_addr.ip4, &hi_addr.ip4,
2585  fib_index, is_del);
2586  return 0;
2587  }
2588 
2589  if (addr_valid)
2590  {
2591  int i;
2592 
2593  for (i = 0; i < count; i++)
2594  {
2595  if (is_del == 0)
2596  {
2597  uword event_type, *event_data = 0;
2598 
2599  /* Park the debug CLI until the arp entry is installed */
2601  (vnm, &addr.ip4, vlib_current_process (vm),
2602  1 /* type */ , 0 /* data */ );
2603 
2604  vnet_arp_set_ip4_over_ethernet (vnm, sw_if_index, &addr, flags);
2605 
2607  event_type = vlib_process_get_events (vm, &event_data);
2608  vec_reset_length (event_data);
2609  if (event_type != 1)
2610  clib_warning ("event type %d unexpected", event_type);
2611  }
2612  else
2613  vnet_arp_unset_ip4_over_ethernet (vnm, sw_if_index, &addr);
2614 
2616  }
2617  }
2618  else
2619  {
2620  return clib_error_return (0, "unknown input `%U'",
2621  format_unformat_error, input);
2622  }
2623 
2624  return 0;
2625 }
2626 
2627 /* *INDENT-OFF* */
2628 /*?
2629  * Add or delete IPv4 ARP cache entries.
2630  *
2631  * @note 'set ip arp' options (e.g. delete, static, 'fib-id <id>',
2632  * 'count <number>', 'interface ip4_addr mac_addr') can be added in
2633  * any order and combination.
2634  *
2635  * @cliexpar
2636  * @parblock
2637  * Add or delete IPv4 ARP cache entries as follows. MAC Address can be in
2638  * either aa:bb:cc:dd:ee:ff format or aabb.ccdd.eeff format.
2639  * @cliexcmd{set ip arp GigabitEthernet2/0/0 6.0.0.3 dead.beef.babe}
2640  * @cliexcmd{set ip arp delete GigabitEthernet2/0/0 6.0.0.3 de:ad:be:ef:ba:be}
2641  *
2642  * To add or delete an IPv4 ARP cache entry to or from a specific fib
2643  * table:
2644  * @cliexcmd{set ip arp fib-id 1 GigabitEthernet2/0/0 6.0.0.3 dead.beef.babe}
2645  * @cliexcmd{set ip arp fib-id 1 delete GigabitEthernet2/0/0 6.0.0.3 dead.beef.babe}
2646  *
2647  * Add or delete IPv4 static ARP cache entries as follows:
2648  * @cliexcmd{set ip arp static GigabitEthernet2/0/0 6.0.0.3 dead.beef.babe}
2649  * @cliexcmd{set ip arp static delete GigabitEthernet2/0/0 6.0.0.3 dead.beef.babe}
2650  *
2651  * For testing / debugging purposes, the 'set ip arp' command can add or
2652  * delete multiple entries. Supply the 'count N' parameter:
2653  * @cliexcmd{set ip arp count 10 GigabitEthernet2/0/0 6.0.0.3 dead.beef.babe}
2654  * @endparblock
2655  ?*/
2656 VLIB_CLI_COMMAND (ip_arp_add_del_command, static) = {
2657  .path = "set ip arp",
2658  .short_help =
2659  "set ip arp [del] <intfc> <ip-address> <mac-address> [static] [no-fib-entry] [count <count>] [fib-id <fib-id>] [proxy <lo-addr> - <hi-addr>]",
2660  .function = ip_arp_add_del_command_fn,
2661 };
2662 /* *INDENT-ON* */
2663 
2664 static clib_error_t *
2667  input, vlib_cli_command_t * cmd)
2668 {
2669  vnet_main_t *vnm = vnet_get_main ();
2670  u32 sw_if_index;
2671  int enable = 0;
2672 
2673  sw_if_index = ~0;
2674 
2675  while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
2676  {
2677  if (unformat (input, "%U", unformat_vnet_sw_interface,
2678  vnm, &sw_if_index))
2679  ;
2680  else if (unformat (input, "enable") || unformat (input, "on"))
2681  enable = 1;
2682  else if (unformat (input, "disable") || unformat (input, "off"))
2683  enable = 0;
2684  else
2685  break;
2686  }
2687 
2688  if (~0 == sw_if_index)
2689  return clib_error_return (0, "unknown input '%U'",
2690  format_unformat_error, input);
2691 
2692  vnet_proxy_arp_enable_disable (vnm, sw_if_index, enable);
2693 
2694  return 0;
2695 }
2696 
2697 /* *INDENT-OFF* */
2698 /*?
2699  * Enable proxy-arp on an interface. The vpp stack will answer ARP
2700  * requests for the indicated address range. Multiple proxy-arp
2701  * ranges may be provisioned.
2702  *
2703  * @note Proxy ARP as a technology is infamous for blackholing traffic.
2704  * Also, the underlying implementation has not been performance-tuned.
2705  * Avoid creating an unnecessarily large set of ranges.
2706  *
2707  * @cliexpar
2708  * To enable proxy arp on a range of addresses, use:
2709  * @cliexcmd{set ip arp proxy 6.0.0.1 - 6.0.0.11}
2710  * Append 'del' to delete a range of proxy ARP addresses:
2711  * @cliexcmd{set ip arp proxy 6.0.0.1 - 6.0.0.11 del}
2712  * You must then specifically enable proxy arp on individual interfaces:
2713  * @cliexcmd{set interface proxy-arp GigabitEthernet0/8/0 enable}
2714  * To disable proxy arp on an individual interface:
2715  * @cliexcmd{set interface proxy-arp GigabitEthernet0/8/0 disable}
2716  ?*/
2717 VLIB_CLI_COMMAND (set_int_proxy_enable_command, static) = {
2718  .path = "set interface proxy-arp",
2719  .short_help =
2720  "set interface proxy-arp <intfc> [enable|disable]",
2721  .function = set_int_proxy_arp_command_fn,
2722 };
2723 /* *INDENT-ON* */
2724 
2725 
2726 /*
2727  * ARP/ND Termination in a L2 Bridge Domain based on IP4/IP6 to MAC
2728  * hash tables mac_by_ip4 and mac_by_ip6 for each BD.
2729  */
2730 typedef enum
2731 {
2735 } arp_term_next_t;
2736 
2738 
2739 static uword
2741  vlib_node_runtime_t * node, vlib_frame_t * frame)
2742 {
2743  l2input_main_t *l2im = &l2input_main;
2744  u32 n_left_from, next_index, *from, *to_next;
2745  u32 n_replies_sent = 0;
2746  u16 last_bd_index = ~0;
2747  l2_bridge_domain_t *last_bd_config = 0;
2748  l2_input_config_t *cfg0;
2749 
2750  from = vlib_frame_vector_args (frame);
2751  n_left_from = frame->n_vectors;
2752  next_index = node->cached_next_index;
2753 
2754  while (n_left_from > 0)
2755  {
2756  u32 n_left_to_next;
2757 
2758  vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
2759 
2760  while (n_left_from > 0 && n_left_to_next > 0)
2761  {
2762  vlib_buffer_t *p0;
2763  ethernet_header_t *eth0;
2764  ethernet_arp_header_t *arp0;
2765  ip6_header_t *iph0;
2766  u8 *l3h0;
2767  u32 pi0, error0, next0, sw_if_index0;
2768  u16 ethertype0;
2769  u16 bd_index0;
2770  u32 ip0;
2771  u8 *macp0;
2772 
2773  pi0 = from[0];
2774  to_next[0] = pi0;
2775  from += 1;
2776  to_next += 1;
2777  n_left_from -= 1;
2778  n_left_to_next -= 1;
2779 
2780  p0 = vlib_get_buffer (vm, pi0);
2781  // Terminate only local (SHG == 0) ARP
2782  if (vnet_buffer (p0)->l2.shg != 0)
2783  goto next_l2_feature;
2784 
2785  eth0 = vlib_buffer_get_current (p0);
2786  l3h0 = (u8 *) eth0 + vnet_buffer (p0)->l2.l2_len;
2787  ethertype0 = clib_net_to_host_u16 (*(u16 *) (l3h0 - 2));
2788  arp0 = (ethernet_arp_header_t *) l3h0;
2789 
2790  if (ethertype0 != ETHERNET_TYPE_ARP)
2791  goto check_ip6_nd;
2792 
2793  if ((arp0->opcode !=
2794  clib_host_to_net_u16 (ETHERNET_ARP_OPCODE_request)) &&
2795  (arp0->opcode !=
2796  clib_host_to_net_u16 (ETHERNET_ARP_OPCODE_reply)))
2797  goto check_ip6_nd;
2798 
2799  /* Must be ARP request/reply packet here */
2800  if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) &&
2801  (p0->flags & VLIB_BUFFER_IS_TRACED)))
2802  {
2803  u8 *t0 = vlib_add_trace (vm, node, p0,
2804  sizeof (ethernet_arp_input_trace_t));
2805  clib_memcpy_fast (t0, l3h0,
2806  sizeof (ethernet_arp_input_trace_t));
2807  }
2808 
2809  error0 = 0;
2810  error0 =
2811  (arp0->l2_type !=
2812  clib_net_to_host_u16 (ETHERNET_ARP_HARDWARE_TYPE_ethernet)
2813  ? ETHERNET_ARP_ERROR_l2_type_not_ethernet : error0);
2814  error0 =
2815  (arp0->l3_type !=
2816  clib_net_to_host_u16 (ETHERNET_TYPE_IP4) ?
2817  ETHERNET_ARP_ERROR_l3_type_not_ip4 : error0);
2818 
2819  sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
2820 
2821  if (error0)
2822  goto drop;
2823 
2824  /* Trash ARP packets whose ARP-level source addresses do not
2825  match, or if requester address is mcast */
2826  if (PREDICT_FALSE
2828  arp0->ip4_over_ethernet[0].
2829  mac.bytes))
2830  || ethernet_address_cast (arp0->ip4_over_ethernet[0].mac.bytes))
2831  {
2832  /* VRRP virtual MAC may be different to SMAC in ARP reply */
2834  (arp0->ip4_over_ethernet[0].mac.bytes, vrrp_prefix))
2835  {
2836  error0 = ETHERNET_ARP_ERROR_l2_address_mismatch;
2837  goto drop;
2838  }
2839  }
2840  if (PREDICT_FALSE
2841  (ip4_address_is_multicast (&arp0->ip4_over_ethernet[0].ip4)))
2842  {
2843  error0 = ETHERNET_ARP_ERROR_l3_src_address_not_local;
2844  goto drop;
2845  }
2846 
2847  /* Check if anyone want ARP request events for L2 BDs */
2848  {
2850  if (am->wc_ip4_arp_publisher_node != (uword) ~ 0)
2851  vnet_arp_wc_publish (sw_if_index0, &arp0->ip4_over_ethernet[0]);
2852  }
2853 
2854  /* lookup BD mac_by_ip4 hash table for MAC entry */
2855  ip0 = arp0->ip4_over_ethernet[1].ip4.as_u32;
2856  bd_index0 = vnet_buffer (p0)->l2.bd_index;
2857  if (PREDICT_FALSE ((bd_index0 != last_bd_index)
2858  || (last_bd_index == (u16) ~ 0)))
2859  {
2860  last_bd_index = bd_index0;
2861  last_bd_config = vec_elt_at_index (l2im->bd_configs, bd_index0);
2862  }
2863  macp0 = (u8 *) hash_get (last_bd_config->mac_by_ip4, ip0);
2864 
2865  if (PREDICT_FALSE (!macp0))
2866  goto next_l2_feature; /* MAC not found */
2867  if (PREDICT_FALSE (arp0->ip4_over_ethernet[0].ip4.as_u32 ==
2868  arp0->ip4_over_ethernet[1].ip4.as_u32))
2869  goto next_l2_feature; /* GARP */
2870 
2871  /* MAC found, send ARP reply -
2872  Convert ARP request packet to ARP reply */
2873  arp0->opcode = clib_host_to_net_u16 (ETHERNET_ARP_OPCODE_reply);
2874  arp0->ip4_over_ethernet[1] = arp0->ip4_over_ethernet[0];
2875  arp0->ip4_over_ethernet[0].ip4.as_u32 = ip0;
2876  mac_address_from_bytes (&arp0->ip4_over_ethernet[0].mac, macp0);
2877  clib_memcpy_fast (eth0->dst_address, eth0->src_address, 6);
2878  clib_memcpy_fast (eth0->src_address, macp0, 6);
2879  n_replies_sent += 1;
2880 
2881  output_response:
2882  /* For BVI, need to use l2-fwd node to send ARP reply as
2883  l2-output node cannot output packet to BVI properly */
2884  cfg0 = vec_elt_at_index (l2im->configs, sw_if_index0);
2885  if (PREDICT_FALSE (cfg0->bvi))
2886  {
2887  vnet_buffer (p0)->l2.feature_bitmap |= L2INPUT_FEAT_FWD;
2888  vnet_buffer (p0)->sw_if_index[VLIB_RX] = 0;
2889  goto next_l2_feature;
2890  }
2891 
2892  /* Send ARP/ND reply back out input interface through l2-output */
2893  vnet_buffer (p0)->sw_if_index[VLIB_TX] = sw_if_index0;
2894  next0 = ARP_TERM_NEXT_L2_OUTPUT;
2895  vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
2896  to_next, n_left_to_next, pi0,
2897  next0);
2898  continue;
2899 
2900  check_ip6_nd:
2901  /* IP6 ND event notification or solicitation handling to generate
2902  local response instead of flooding */
2903  iph0 = (ip6_header_t *) l3h0;
2904  if (PREDICT_FALSE (ethertype0 == ETHERNET_TYPE_IP6 &&
2905  iph0->protocol == IP_PROTOCOL_ICMP6 &&
2907  (&iph0->src_address)))
2908  {
2909  sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
2910  if (vnet_ip6_nd_term
2911  (vm, node, p0, eth0, iph0, sw_if_index0,
2912  vnet_buffer (p0)->l2.bd_index))
2913  goto output_response;
2914  }
2915 
2916  next_l2_feature:
2917  {
2919  L2INPUT_FEAT_ARP_TERM);
2920  vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
2921  to_next, n_left_to_next,
2922  pi0, next0);
2923  continue;
2924  }
2925 
2926  drop:
2927  if (0 == arp0->ip4_over_ethernet[0].ip4.as_u32 ||
2928  (arp0->ip4_over_ethernet[0].ip4.as_u32 ==
2929  arp0->ip4_over_ethernet[1].ip4.as_u32))
2930  {
2931  error0 = ETHERNET_ARP_ERROR_gratuitous_arp;
2932  }
2933  next0 = ARP_TERM_NEXT_DROP;
2934  p0->error = node->errors[error0];
2935 
2936  vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
2937  to_next, n_left_to_next, pi0,
2938  next0);
2939  }
2940 
2941  vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2942  }
2943 
2944  vlib_error_count (vm, node->node_index,
2945  ETHERNET_ARP_ERROR_replies_sent, n_replies_sent);
2946  return frame->n_vectors;
2947 }
2948 
2949 /* *INDENT-OFF* */
2951  .function = arp_term_l2bd,
2952  .name = "arp-term-l2bd",
2953  .vector_size = sizeof (u32),
2954  .n_errors = ETHERNET_ARP_N_ERROR,
2955  .error_strings = ethernet_arp_error_strings,
2956  .n_next_nodes = ARP_TERM_N_NEXT,
2957  .next_nodes = {
2958  [ARP_TERM_NEXT_L2_OUTPUT] = "l2-output",
2959  [ARP_TERM_NEXT_DROP] = "error-drop",
2960  },
2961  .format_buffer = format_ethernet_arp_header,
2962  .format_trace = format_arp_term_input_trace,
2963 };
2964 /* *INDENT-ON* */
2965 
2966 clib_error_t *
2968 {
2969  // Initialize the feature next-node indexes
2971  arp_term_l2bd_node.index,
2975  return 0;
2976 }
2977 
2979 
2980 void
2982 {
2983  if (e->sw_if_index == sw_if_index)
2984  {
2987  }
2988 }
2989 
2990 void
2992 {
2995  adj_index_t ai;
2996 
2997  /* *INDENT-OFF* */
2998  pool_foreach (e, am->ip4_entry_pool,
2999  ({
3000  change_arp_mac (sw_if_index, e);
3001  }));
3002  /* *INDENT-ON* */
3003 
3004  ai = adj_glean_get (FIB_PROTOCOL_IP4, sw_if_index);
3005 
3006  if (ADJ_INDEX_INVALID != ai)
3008 }
3009 
3010 void
3012 {
3013  ip4_main_t *i4m = &ip4_main;
3014  ip4_address_t *ip4_addr = ip4_interface_first_address (i4m, sw_if_index, 0);
3015 
3016  send_ip4_garp_w_addr (vm, ip4_addr, sw_if_index);
3017 }
3018 
3019 void
3021  const ip4_address_t * ip4_addr, u32 sw_if_index)
3022 {
3023  ip4_main_t *i4m = &ip4_main;
3024  vnet_main_t *vnm = vnet_get_main ();
3025  u8 *rewrite, rewrite_len;
3026  vnet_hw_interface_t *hi = vnet_get_sup_hw_interface (vnm, sw_if_index);
3027 
3028  if (ip4_addr)
3029  {
3030  clib_warning ("Sending GARP for IP4 address %U on sw_if_idex %d",
3031  format_ip4_address, ip4_addr, sw_if_index);
3032 
3033  /* Form GARP packet for output - Gratuitous ARP is an ARP request packet
3034  where the interface IP/MAC pair is used for both source and request
3035  MAC/IP pairs in the request */
3036  u32 bi = 0;
3038  (vm, &i4m->ip4_arp_request_packet_template, &bi);
3039 
3040  if (!h)
3041  return;
3042 
3045  h->ip4_over_ethernet[0].ip4 = ip4_addr[0];
3046  h->ip4_over_ethernet[1].ip4 = ip4_addr[0];
3047 
3048  /* Setup MAC header with ARP Etype and broadcast DMAC */
3049  vlib_buffer_t *b = vlib_get_buffer (vm, bi);
3050  rewrite =
3051  ethernet_build_rewrite (vnm, sw_if_index, VNET_LINK_ARP,
3053  rewrite_len = vec_len (rewrite);
3054  vlib_buffer_advance (b, -rewrite_len);
3056  clib_memcpy_fast (e->dst_address, rewrite, rewrite_len);
3057  vec_free (rewrite);
3058 
3059  /* Send GARP packet out the specified interface */
3060  vnet_buffer (b)->sw_if_index[VLIB_RX] =
3061  vnet_buffer (b)->sw_if_index[VLIB_TX] = sw_if_index;
3063  u32 *to_next = vlib_frame_vector_args (f);
3064  to_next[0] = bi;
3065  f->n_vectors = 1;
3067  }
3068 }
3069 
3070 /*
3071  * Remove any arp entries associated with the specified interface
3072  */
3073 static clib_error_t *
3075 {
3077 
3078  if (!is_add && sw_if_index != ~0)
3079  {
3081  /* *INDENT-OFF* */
3082  pool_foreach (e, am->ip4_entry_pool, ({
3083  if (e->sw_if_index != sw_if_index)
3084  continue;
3085  vnet_arp_set_ip4_over_ethernet_rpc_args_t args = {
3086  .sw_if_index = sw_if_index,
3087  .ip4 = e->ip4_address,
3088  };
3090  }));
3091  /* *INDENT-ON* */
3092  arp_disable (am, sw_if_index);
3093  }
3094  else if (is_add)
3095  {
3096  vnet_feature_enable_disable ("arp", "arp-disabled",
3097  sw_if_index, 1, NULL, 0);
3098  }
3099 
3100  return (NULL);
3101 }
3102 
3104 
3105 /*
3106  * fd.io coding-style-patch-verification: ON
3107  *
3108  * Local Variables:
3109  * eval: (c-set-style "gnu")
3110  * End:
3111  */
#define vec_validate(V, I)
Make sure vector is long enough for given index (no header, unspecified alignment) ...
Definition: vec.h:439
ip_neighbor_flags_t flags
Definition: arp.h:31
#define vnet_rewrite_one_header(rw0, p0, most_likely_size)
Definition: rewrite.h:198
u32 flags
buffer flags: VLIB_BUFFER_FREE_LIST_INDEX_MASK: bits used to store free list index, VLIB_BUFFER_IS_TRACED: trace this buffer.
Definition: buffer.h:124
Definition: edit.h:64
static void set_ip4_over_ethernet_rpc_callback(vnet_arp_set_ip4_over_ethernet_rpc_args_t *a)
Definition: arp.c:2290
static vlib_node_registration_t arp_proxy_node
(constructor) VLIB_REGISTER_NODE (arp_proxy_node)
Definition: arp.c:1707
vmrglw vmrglh hi
int vnet_arp_set_ip4_over_ethernet(vnet_main_t *vnm, u32 sw_if_index, const ethernet_arp_ip4_over_ethernet_address_t *a, ip_neighbor_flags_t flags)
Definition: arp.c:2380
#define pool_next_index(P, I)
Return next occupied pool index after i, useful for safe iteration.
Definition: pool.h:522
fib_node_index_t fib_table_entry_path_add(u32 fib_index, const fib_prefix_t *prefix, fib_source_t source, fib_entry_flag_t flags, dpo_proto_t next_hop_proto, const ip46_address_t *next_hop, u32 next_hop_sw_if_index, u32 next_hop_fib_index, u32 next_hop_weight, fib_mpls_label_t *next_hop_labels, fib_route_path_flags_t path_flags)
Add one path to an entry (aka route) in the FIB.
Definition: fib_table.c:532
struct pg_ethernet_arp_header_t::@131 ip4_over_ethernet[2]
typedef address
Definition: ip_types.api:83
#define VNET_REWRITE_FOR_SW_INTERFACE_ADDRESS_BROADCAST
Definition: rewrite.h:221
static uword arp_term_l2bd(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
Definition: arp.c:2740
#define hash_set(h, key, value)
Definition: hash.h:255
l2_input_config_t * configs
Definition: l2_input.h:62
u32 flags
Definition: vhost_user.h:141
static void arp_enable(ethernet_arp_main_t *am, u32 sw_if_index)
Definition: arp.c:453
An entry in a FIB table.
Definition: fib_entry.h:468
ip4_table_bind_function_t * function
Definition: ip4.h:92
static uword arp_disabled(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
Definition: arp.c:1127
#define CLIB_UNUSED(x)
Definition: clib.h:83
u8 * format_ethernet_arp_ip4_entry(u8 *s, va_list *va)
Definition: arp.c:262
arp_dst_fib_type
Definition: arp.c:1225
ip4_add_del_interface_address_callback_t * add_del_interface_address_callbacks
Functions to call when interface address changes.
Definition: ip4.h:139
vl_api_mac_address_t mac
Definition: l2.api:490
#define hash_unset(h, key)
Definition: hash.h:261
a
Definition: bitmap.h:538
int vnet_arp_unset_ip4_over_ethernet(vnet_main_t *vnm, u32 sw_if_index, const ethernet_arp_ip4_over_ethernet_address_t *a)
Control Plane hook to remove an ARP entry.
Definition: arp.c:1945
An indication that the rewrite is incomplete, i.e.
Definition: adj_nbr.h:90
static uword * vlib_process_wait_for_event(vlib_main_t *vm)
Definition: node_funcs.h:593
static uword arp_reply(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
Definition: arp.c:1258
u32 enabled
Is ARP enabled on this interface.
Definition: arp.c:56
uword unformat_pg_arp_header(unformat_input_t *input, va_list *args)
Definition: arp.c:1897
static void pg_ethernet_arp_header_init(pg_ethernet_arp_header_t *p)
Definition: arp.c:1880
static int vnet_arp_unset_ip4_over_ethernet_internal(vnet_main_t *vnm, vnet_arp_set_ip4_over_ethernet_rpc_args_t *args)
Definition: arp.c:2241
static void increment_ip4_and_mac_address(ethernet_arp_ip4_over_ethernet_address_t *a)
Definition: arp.c:2357
An indication that the rewrite is complete, i.e.
Definition: adj_nbr.h:98
vnet_main_t * vnet_get_main(void)
Definition: misc.c:46
static vnet_hw_interface_t * vnet_get_sup_hw_interface(vnet_main_t *vnm, u32 sw_if_index)
static uword vlib_current_process(vlib_main_t *vm)
Definition: node_funcs.h:400
static void arp_add_del_interface_address(ip4_main_t *im, uword opaque, u32 sw_if_index, ip4_address_t *address, u32 address_length, u32 if_address_index, u32 is_del)
Definition: arp.c:2076
static void pg_edit_set_fixed(pg_edit_t *e, u64 value)
Definition: edit.h:153
static clib_error_t * show_ip4_arp(vlib_main_t *vm, unformat_input_t *input, vlib_cli_command_t *cmd)
Definition: arp.c:1805
vnet_interface_main_t interface_main
Definition: vnet.h:56
pending_resolution_t * pending_resolutions
Definition: arp.c:88
u32 sw_if_index
Definition: arp.h:94
static void vlib_error_count(vlib_main_t *vm, uword node_index, uword counter, uword increment)
Definition: error_funcs.h:57
Multicast Adjacency.
Definition: adj.h:82
#define clib_memcpy_fast(a, b, c)
Definition: string.h:81
static vlib_node_registration_t arp_reply_node
(constructor) VLIB_REGISTER_NODE (arp_reply_node)
Definition: arp.c:1691
vnet_link_t adj_get_link_type(adj_index_t ai)
Return the link type of the adjacency.
Definition: adj.c:497
ip4_address_t * ip4_interface_first_address(ip4_main_t *im, u32 sw_if_index, ip_interface_address_t **result_ia)
Definition: ip4_forward.c:278
static f64 vlib_time_now(vlib_main_t *vm)
Definition: main.h:279
Broadcasr Adjacency.
Definition: adj.h:85
IP unicast adjacency.
Definition: adj.h:221
Information related to the source of a FIB entry.
Definition: fib_entry.h:360
struct ethernet_arp_interface_t_ ethernet_arp_interface_t
Per-interface ARP configuration and state.
#define foreach_arp_disabled_error
Definition: arp.c:1109
void change_arp_mac(u32 sw_if_index, ethernet_arp_ip4_entry_t *e)
Definition: arp.c:2981
static u8 * format_ethernet_arp_header(u8 *s, va_list *va)
Definition: arp.c:215
u8 src_address[6]
Definition: packet.h:56
static clib_error_t * set_int_proxy_arp_command_fn(vlib_main_t *vm, unformat_input_t *input, vlib_cli_command_t *cmd)
Definition: arp.c:2665
clib_error_t * ip4_set_arp_limit(u32 arp_limit)
Definition: arp.c:1933
static uword arp_input(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
Definition: arp.c:1034
This packet is to be rewritten and forwarded to the next processing node.
Definition: adj.h:73
#define vec_add1(V, E)
Add 1 element to end of vector (unspecified alignment).
Definition: vec.h:522
word vnet_sw_interface_compare(vnet_main_t *vnm, uword sw_if_index0, uword sw_if_index1)
Definition: interface.c:1208
void arp_update_adjacency(vnet_main_t *vnm, u32 sw_if_index, u32 ai)
Definition: arp.c:519
static vlib_node_registration_t arp_disabled_node
(constructor) VLIB_REGISTER_NODE (arp_disabled_node)
Definition: arp.c:1676
vl_api_address_t src
Definition: gre.api:51
static void arp_table_bind(ip4_main_t *im, uword opaque, u32 sw_if_index, u32 new_fib_index, u32 old_fib_index)
Definition: arp.c:2134
static uword unformat_ethernet_arp_opcode_host_byte_order(unformat_input_t *input, va_list *args)
Definition: arp.c:174
#define vec_add2(V, P, N)
Add N elements to end of vector V, return pointer to new elements in P.
Definition: vec.h:560
int i
static_always_inline void mac_address_copy(mac_address_t *dst, const mac_address_t *src)
Definition: mac_address.h:128
adj_index_t adj_glean_get(fib_protocol_t proto, u32 sw_if_index)
Get an existing glean.
Definition: adj_glean.c:119
uword unformat_user(unformat_input_t *input, unformat_function_t *func,...)
Definition: unformat.c:989
arp_reply_next_t
Definition: arp.c:959
static u32 format_get_indent(u8 *s)
Definition: format.h:72
uword unformat_pg_edit(unformat_input_t *input, va_list *args)
Definition: edit.c:106
void adj_nbr_walk_nh4(u32 sw_if_index, const ip4_address_t *addr, adj_walk_cb_t cb, void *ctx)
Walk adjacencies on a link with a given v4 next-hop.
Definition: adj_nbr.c:605
static void arp_enable_disable_interface(ip4_main_t *im, uword opaque, u32 sw_if_index, u32 is_enable)
Definition: arp.c:2059
pg_edit_t l2_type
Definition: arp.c:1869
static vnet_sw_interface_t * vnet_get_sw_interface(vnet_main_t *vnm, u32 sw_if_index)
const fib_prefix_t * fib_entry_get_prefix(fib_node_index_t fib_entry_index)
Definition: fib_entry.c:1699
u8 * format(u8 *s, const char *fmt,...)
Definition: format.c:424
uword * opcode_by_name
Definition: arp.c:84
unformat_function_t unformat_vnet_sw_interface
u8 data[128]
Definition: ipsec.api:251
u8 feature_arc_index
Definition: arp.c:110
static uword ip4_address_is_multicast(const ip4_address_t *a)
Definition: ip4_packet.h:318
vlib_error_t * errors
Vector of errors for this node.
Definition: node.h:470
Definition: fib_entry.h:283
#define pool_get(P, E)
Allocate an object E from a pool P (unspecified alignment).
Definition: pool.h:236
vhost_vring_addr_t addr
Definition: vhost_user.h:147
ip6_address_t src_address
Definition: ip6_packet.h:383
unsigned char u8
Definition: types.h:56
static u32 vnet_l2_feature_next(vlib_buffer_t *b, u32 *next_nodes, u32 feat_bit)
Return the graph node index for the feature corresponding to the next set bit after clearing the curr...
Definition: feat_bitmap.h:94
#define vec_reset_length(v)
Reset vector length to zero NULL-pointer tolerant.
static pg_node_t * pg_get_node(uword node_index)
Definition: pg.h:363
vnet_link_t ia_link
link/ether-type 1 bytes
Definition: adj.h:242
union ip_adjacency_t_::@48 sub_type
static int vnet_arp_populate_ip4_over_ethernet_internal(vnet_main_t *vnm, vnet_arp_set_ip4_over_ethernet_rpc_args_t *args)
Definition: arp.c:2268
u32 send_garp_na_process_node_index
Definition: arp.c:131
Adjacency to punt this packet.
Definition: adj.h:55
VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION(ethernet_arp_sw_interface_up_down)
void adj_glean_update_rewrite(adj_index_t adj_index)
adj_glean_update_rewrite
Definition: adj_glean.c:101
static const u8 vrrp_prefix[]
Definition: arp.c:128
u32 ip4_fib_table_get_index_for_sw_if_index(u32 sw_if_index)
Definition: ip4_fib.c:224
format_function_t format_ip4_address
Definition: format.h:75
static ip_adjacency_t * adj_get(adj_index_t adj_index)
Get a pointer to an adjacency object from its index.
Definition: adj.h:433
pg_edit_t n_l3_address_bytes
Definition: arp.c:1870
#define static_always_inline
Definition: clib.h:100
void * vlib_packet_template_get_packet(vlib_main_t *vm, vlib_packet_template_t *t, u32 *bi_result)
Definition: buffer.c:400
#define pool_foreach(VAR, POOL, BODY)
Iterate through pool.
Definition: pool.h:493
ip4_enable_disable_interface_callback_t * enable_disable_interface_callbacks
Functions to call when interface becomes IPv4 enabled/disable.
Definition: ip4.h:143
unformat_function_t unformat_ip4_address
Definition: format.h:70
vl_api_interface_index_t sw_if_index
Definition: gre.api:50
ethernet_arp_ip4_over_ethernet_address_t ip4_over_ethernet[2]
Definition: arp_packet.h:141
#define VLIB_INIT_FUNCTION(x)
Definition: init.h:173
static uword vlib_process_get_events(vlib_main_t *vm, uword **data_vector)
Return the first event type which has occurred and a vector of per-event data of that type...
Definition: node_funcs.h:516
static ethernet_arp_ip4_entry_t * force_reuse_arp_entry(void)
Definition: arp.c:672
static uword ethernet_address_cast(u8 *a)
Definition: packet.h:67
pending_resolution_t * mac_changes
Definition: arp.c:92
enum ip_neighbor_flags_t_ ip_neighbor_flags_t
u8 dst_address[6]
Definition: packet.h:55
static int vnet_arp_set_ip4_over_ethernet_internal(vnet_main_t *vnm, vnet_arp_set_ip4_over_ethernet_rpc_args_t *args)
Definition: arp.c:704
u8 * format_white_space(u8 *s, va_list *va)
Definition: std-formats.c:129
static int ip4_arp_entry_sort(void *a1, void *a2)
Definition: arp.c:1764
enum adj_walk_rc_t_ adj_walk_rc_t
return codes from a adjacency walker callback function
void proxy_arp_walk(proxy_arp_walk_t cb, void *data)
Definition: arp.c:2399
enum arp_input_next_t_ arp_input_next_t
#define vec_elt_at_index(v, i)
Get vector value at index i checking that i is in bounds.
Aggregate type for a prefix.
Definition: fib_types.h:203
u8 * format_hex_bytes(u8 *s, va_list *va)
Definition: std-formats.c:84
vlib_frame_t * vlib_get_frame_to_node(vlib_main_t *vm, u32 to_node_index)
Definition: main.c:185
#define clib_error_return(e, args...)
Definition: error.h:99
ethernet_arp_hardware_type_t
Definition: arp_packet.h:91
static u8 * format_ethernet_arp_input_trace(u8 *s, va_list *va)
Definition: arp.c:288
void vl_api_rpc_call_main_thread(void *fp, u8 *data, u32 data_length)
Definition: vlib_api.c:608
#define foreach_ethernet_arp_opcode
Definition: arp_packet.h:63
uword * pending_resolutions_by_address
Definition: arp.c:87
unsigned int u32
Definition: types.h:88
static void * pg_create_edit_group(pg_stream_t *s, int n_edit_bytes, int n_packet_bytes, u32 *group_index)
Definition: pg.h:231
u32 fib_table_find(fib_protocol_t proto, u32 table_id)
Get the index of the FIB for a Table-ID.
Definition: fib_table.c:1080
u16 fp_len
The mask length.
Definition: fib_types.h:207
static enum arp_dst_fib_type arp_dst_fib_check(const fib_node_index_t fei, fib_entry_flag_t *flags)
Definition: arp.c:1238
int(* arp_change_event_cb_t)(u32 pool_index, const mac_address_t *mac, u32 sw_if_index, const ip4_address_t *address)
Definition: arp.h:72
static ethernet_arp_ip4_entry_t * arp_entry_find(ethernet_arp_interface_t *eai, const ip4_address_t *addr)
Definition: arp.c:407
#define hash_create_string(elts, value_bytes)
Definition: hash.h:690
pg_edit_t l3_type
Definition: arp.c:1869
static adj_walk_rc_t arp_mk_complete_walk(adj_index_t ai, void *ctx)
Definition: arp.c:426
Per-interface ARP configuration and state.
Definition: arp.c:46
static heap_elt_t * first(heap_header_t *h)
Definition: heap.c:59
vlib_error_t error
Error code for buffers to be enqueued to error handler.
Definition: buffer.h:136
#define FOR_EACH_SRC_ADDED(_entry, _src, _source, action)
static int arp_is_enabled(ethernet_arp_main_t *am, u32 sw_if_index)
Definition: arp.c:444
Definition: fib_entry.h:286
#define hash_get(h, key)
Definition: hash.h:249
format_function_t format_vnet_sw_interface_name
void adj_mcast_update_rewrite(adj_index_t adj_index, u8 *rewrite, u8 offset)
adj_mcast_update_rewrite
Definition: adj_mcast.c:102
#define ADJ_INDEX_INVALID
Invalid ADJ index - used when no adj is known likewise blazoned capitals INVALID speak volumes where ...
Definition: adj_types.h:36
#define pool_elt_at_index(p, i)
Returns pointer to element at given index.
Definition: pool.h:514
static ethernet_header_t * ethernet_buffer_get_header(vlib_buffer_t *b)
Definition: ethernet.h:376
static_always_inline void mac_address_from_bytes(mac_address_t *mac, const u8 *bytes)
Definition: mac_address.h:92
#define foreach_ethernet_arp_error
Definition: arp.c:966
vlib_main_t * vlib_main
Definition: vnet.h:80
int vnet_proxy_arp_enable_disable(vnet_main_t *vnm, u32 sw_if_index, u8 enable)
Definition: arp.c:2412
static void arp_mk_complete(adj_index_t ai, ethernet_arp_ip4_entry_t *e)
Definition: arp.c:383
static void vlib_process_signal_event(vlib_main_t *vm, uword node_index, uword type_opaque, uword data)
Definition: node_funcs.h:934
Adjacency source.
Definition: fib_entry.h:113
enum fib_source_t_ fib_source_t
The different sources that can create a route.
ip46_address_t fp_addr
The address type is not deriveable from the fp_addr member.
Definition: fib_types.h:226
uword type_opaque
Definition: arp.c:74
vlib_frame_t * data_callback(flow_report_main_t *frm, flow_report_t *fr, vlib_frame_t *f, u32 *to_next, u32 node_index)
#define ETHERNET_ARP_ARGS_FLUSH
Definition: arp.c:123
ip4_address_t ip4_address
Definition: arp.h:27
long ctx[MAX_CONNS]
Definition: main.c:144
mac_address_t mac
Definition: arp.h:29
struct _unformat_input_t unformat_input_t
u32 sw_if_index
Definition: arp.h:26
unsigned short u16
Definition: types.h:57
ethernet_arp_ip4_entry_t * ip4_neighbors_pool(void)
Definition: arp.c:1779
void vlib_put_frame_to_node(vlib_main_t *vm, u32 to_node_index, vlib_frame_t *f)
Definition: main.c:194
static void * vlib_buffer_get_current(vlib_buffer_t *b)
Get pointer to current data to process.
Definition: buffer.h:229
#define pool_put(P, E)
Free an object E in pool P.
Definition: pool.h:286
static void * vlib_process_signal_event_data(vlib_main_t *vm, uword node_index, uword type_opaque, uword n_data_elts, uword n_data_elt_bytes)
Definition: node_funcs.h:828
#define PREDICT_FALSE(x)
Definition: clib.h:112
This packet matches an "interface route" and packets need to be passed to ARP to find rewrite string ...
Definition: adj.h:68
vnet_sw_interface_flags_t flags
Definition: interface.h:703
ethernet_arp_interface_t * ethernet_arp_by_sw_if_index
Per interface state.
Definition: arp.c:101
u32 node_index
Node index.
Definition: node.h:496
static clib_error_t * ethernet_arp_init(vlib_main_t *vm)
Definition: arp.c:2169
static_always_inline int mac_address_equal(const mac_address_t *a, const mac_address_t *b)
Definition: mac_address.h:140
#define vlib_validate_buffer_enqueue_x1(vm, node, next_index, to_next, n_left_to_next, bi0, next0)
Finish enqueueing one buffer forward in the graph.
Definition: buffer_node.h:218
#define vlib_get_next_frame(vm, node, next_index, vectors, n_vectors_left)
Get pointer to next frame vector data by (vlib_node_runtime_t, next_index).
Definition: node_funcs.h:338
void fib_table_unlock(u32 fib_index, fib_protocol_t proto, fib_source_t source)
Take a reference counting lock on the table.
Definition: fib_table.c:1253
static clib_error_t * vnet_arp_delete_sw_interface(vnet_main_t *vnm, u32 sw_if_index, u32 is_add)
Definition: arp.c:3074
ethernet_arp_opcode_t
Definition: arp_packet.h:98
uword unformat_mac_address_t(unformat_input_t *input, va_list *args)
Definition: mac_address.c:37
u32 fib_entry_get_resolving_interface(fib_node_index_t entry_index)
Definition: fib_entry.c:1466
static clib_error_t * ip_arp_add_del_command_fn(vlib_main_t *vm, unformat_input_t *input, vlib_cli_command_t *cmd)
Definition: arp.c:2529
u8 * format_ethernet_type(u8 *s, va_list *args)
Definition: format.c:64
fib_node_index_t ip4_fib_table_lookup(const ip4_fib_t *fib, const ip4_address_t *addr, u32 len)
Definition: ip4_fib.c:291
static void arp_adj_fib_add(ethernet_arp_ip4_entry_t *e, u32 fib_index)
Definition: arp.c:630
struct ip_adjacency_t_::@48::@49 nbr
IP_LOOKUP_NEXT_ARP/IP_LOOKUP_NEXT_REWRITE.
ethernet_proxy_arp_t * proxy_arps
Definition: arp.c:104
This packet matches an "incomplete adjacency" and packets need to be passed to ARP to find rewrite st...
Definition: adj.h:63
void send_ip4_garp(vlib_main_t *vm, u32 sw_if_index)
Definition: arp.c:3011
int fib_entry_is_sourced(fib_node_index_t fib_entry_index, fib_source_t source)
Adjacency to drop this packet.
Definition: adj.h:53
#define VLIB_REGISTER_NODE(x,...)
Definition: node.h:169
#define UNFORMAT_END_OF_INPUT
Definition: format.h:145
u16 n_vectors
Definition: node.h:397
static_always_inline uword vlib_get_thread_index(void)
Definition: threads.h:218
static void arp_mk_incomplete(adj_index_t ai)
Definition: arp.c:393
vlib_main_t * vm
Definition: buffer.c:323
int ip4_address_compare(ip4_address_t *a1, ip4_address_t *a2)
Definition: ip46_cli.c:53
pg_edit_t n_l2_address_bytes
Definition: arp.c:1870
static void arp_disable(ethernet_arp_main_t *am, u32 sw_if_index)
Definition: arp.c:473
ip4_enable_disable_interface_function_t * function
Definition: ip4.h:82
#define vec_free(V)
Free vector&#39;s memory (no header).
Definition: vec.h:341
static_always_inline void vnet_feature_next(u32 *next0, vlib_buffer_t *b0)
Definition: feature.h:302
ip4_add_del_interface_address_function_t * function
Definition: ip4.h:73
static ethernet_arp_main_t ethernet_arp_main
Definition: arp.c:113
static ip4_fib_t * ip4_fib_get(u32 index)
Get the FIB at the given index.
Definition: ip4_fib.h:113
static void feat_bitmap_init_next_nodes(vlib_main_t *vm, u32 node_index, u32 num_features, char **feat_names, u32 *next_nodes)
Initialize the feature next-node indexes of a graph node.
Definition: feat_bitmap.h:43
Multicast Midchain Adjacency.
Definition: adj.h:89
static int ethernet_mac_address_equal(const u8 *a, const u8 *b)
Definition: mac_address.h:85
static char * ethernet_arp_error_strings[]
Definition: arp.c:1652
#define ETHERNET_ARP_ARGS_POPULATE
Definition: arp.c:124
#define clib_warning(format, args...)
Definition: error.h:59
static vlib_node_runtime_t * vlib_node_get_runtime(vlib_main_t *vm, u32 node_index)
Get node runtime by node index.
Definition: node_funcs.h:89
ethernet_arp_reply_error_t
Definition: arp.c:984
unformat_function_t * unformat_edit
Definition: pg.h:315
u8 * format_ip_neighbor_flags(u8 *s, va_list *args)
Definition: ip_neighbor.c:51
uword * mac_changes_by_address
Definition: arp.c:91
uword wc_ip4_arp_publisher_et
Definition: arp.c:107
void wc_arp_set_publisher_node(uword node_index, uword event_type)
Definition: arp.c:2003
static void arp_adj_fib_remove(ethernet_arp_ip4_entry_t *e, u32 fib_index)
Definition: arp.c:648
u32 fib_node_index_t
A typedef of a node index.
Definition: fib_types.h:30
u32 adj_index_t
An index for adjacencies.
Definition: adj_types.h:30
void vlib_put_next_frame(vlib_main_t *vm, vlib_node_runtime_t *r, u32 next_index, u32 n_vectors_left)
Release pointer to next frame vector data.
Definition: main.c:456
int vnet_add_del_ip4_arp_change_event(vnet_main_t *vnm, arp_change_event_cb_t data_callback, u32 pid, void *address_arg, uword node_index, uword type_opaque, uword data, int is_add)
Definition: arp.c:888
void vnet_register_ip4_arp_resolution_event(vnet_main_t *vnm, void *address_arg, uword node_index, uword type_opaque, uword data)
Definition: arp.c:857
static clib_error_t * ethernet_arp_sw_interface_up_down(vnet_main_t *vnm, u32 sw_if_index, u32 flags)
Invoked when the interface&#39;s admin state changes.
Definition: arp.c:2312
char ** l2input_get_feat_names(void)
Return an array of strings containing graph node names of each feature.
Definition: l2_input.c:62
fib_entry_t * fib_entry_get(fib_node_index_t index)
Definition: fib_entry.c:52
int vnet_proxy_arp_add_del(ip4_address_t *lo_addr, ip4_address_t *hi_addr, u32 fib_index, int is_del)
Definition: arp.c:2444
enum fib_entry_flag_t_ fib_entry_flag_t
static u8 * format_ethernet_arp_opcode(u8 *s, va_list *va)
Definition: arp.c:156
void send_ip4_garp_w_addr(vlib_main_t *vm, const ip4_address_t *ip4_addr, u32 sw_if_index)
Definition: arp.c:3020
walk_rc_t() proxy_arp_intf_walk_t(u32 sw_if_index, void *data)
call back function when walking the DB of proxy ARP interface
Definition: arp.h:113
ip_neighbor_flags_t nbr_flags
Definition: arp.c:120
void fib_table_lock(u32 fib_index, fib_protocol_t proto, fib_source_t source)
Release a reference counting lock on the table.
Definition: fib_table.c:1273
u32 proxy_enabled
Is Proxy ARP enabled on this interface.
Definition: arp.c:60
#define VLIB_CLI_COMMAND(x,...)
Definition: cli.h:161
This packets follow a mid-chain adjacency.
Definition: adj.h:76
clib_error_t * arp_term_init(vlib_main_t *vm)
Definition: arp.c:2967
vlib_packet_template_t ip4_arp_request_packet_template
Template used to generate IP4 ARP packets.
Definition: ip4.h:149
arp_disabled_error_t
Definition: arp.c:1112
#define hash_create(elts, value_bytes)
Definition: hash.h:696
#define ETHERNET_ARP_ARGS_REMOVE
Definition: arp.c:122
u16 cached_next_index
Next frame index that vector arguments were last enqueued to last time this node ran.
Definition: node.h:515
static int vnet_arp_wc_publish(u32 sw_if_index, const ethernet_arp_ip4_over_ethernet_address_t *a)
publish wildcard arp event
Definition: arp.c:1968
#define ASSERT(truth)
u32 arp_term_next_node_index[32]
Definition: arp.c:2737
#define vec_delete(V, N, M)
Delete N elements starting at element M.
Definition: vec.h:784
VNET_FEATURE_ARC_INIT(arp_feat, static)
walk_rc_t() proxy_arp_walk_t(const ip4_address_t *lo_addr, const ip4_address_t *hi_addr, u32 fib_index, void *dat)
call back function when walking the DB of proxy ARPs
Definition: arp.h:103
The default route source.
Definition: fib_entry.h:142
IPv4 main type.
Definition: ip4.h:105
uword unformat_vlib_number_by_name(unformat_input_t *input, va_list *args)
Definition: format.c:157
void proxy_arp_intfc_walk(proxy_arp_intf_walk_t cb, void *data)
Definition: arp.c:2481
static void pg_free_edit_group(pg_stream_t *s)
Definition: pg.h:284
static_always_inline u32 arp_mk_reply(vnet_main_t *vnm, vlib_buffer_t *p0, u32 sw_if_index0, const ip4_address_t *if_addr0, ethernet_arp_header_t *arp0, ethernet_header_t *eth_rx)
Definition: arp.c:1174
arp_input_next_t_
Definition: arp.c:1026
u32 arp_delete_rotor
Definition: arp.c:97
static void vlib_buffer_advance(vlib_buffer_t *b, word l)
Advance current data pointer by the supplied (signed!) amount.
Definition: buffer.h:248
size_t count
Definition: vapi.c:47
VNET_FEATURE_INIT(arp_reply_feat_node, static)
#define clib_mem_unaligned(pointer, type)
Definition: types.h:155
format_function_t format_ip6_header
Definition: format.h:97
static char * arp_disabled_error_strings[]
Definition: arp.c:1120
void fib_table_entry_path_remove(u32 fib_index, const fib_prefix_t *prefix, fib_source_t source, dpo_proto_t next_hop_proto, const ip46_address_t *next_hop, u32 next_hop_sw_if_index, u32 next_hop_fib_index, u32 next_hop_weight, fib_route_path_flags_t path_flags)
remove one path to an entry (aka route) in the FIB.
Definition: fib_table.c:705
static void arp_nbr_probe(ip_adjacency_t *adj)
Definition: arp.c:319
Definition: pg.h:94
#define VNET_FEATURES(...)
Definition: feature.h:442
void ethernet_register_input_type(vlib_main_t *vm, ethernet_type_t type, u32 node_index)
Definition: node.c:2072
static vlib_main_t * vlib_get_main(void)
Definition: global_funcs.h:23
static vlib_node_registration_t arp_term_l2bd_node
(constructor) VLIB_REGISTER_NODE (arp_term_l2bd_node)
Definition: arp.c:2950
uword * arp_entries
Hash table of ARP entries.
Definition: arp.c:52
static void * vlib_add_trace(vlib_main_t *vm, vlib_node_runtime_t *r, vlib_buffer_t *b, u32 n_data_bytes)
Definition: trace_funcs.h:55
ip4_table_bind_callback_t * table_bind_callbacks
Functions to call when interface to table biding changes.
Definition: ip4.h:146
f64 time_last_updated
Definition: arp.h:33
static u32 arp_learn(vnet_main_t *vnm, ethernet_arp_main_t *am, u32 sw_if_index, const ethernet_arp_ip4_over_ethernet_address_t *addr)
Definition: arp.c:1018
fib_entry_flag_t fib_entry_get_flags_for_source(fib_node_index_t fib_entry_index, fib_source_t source)
This packets needs to go to ICMP error.
Definition: adj.h:79
This packet is for one of our own IP addresses.
Definition: adj.h:58
Definition: defs.h:47
void vlib_trace_frame_buffers_only(vlib_main_t *vm, vlib_node_runtime_t *node, u32 *buffers, uword n_buffers, uword next_buffer_stride, uword n_buffer_data_bytes_in_trace)
Definition: trace.c:47
ip4_address_t hi_addr
Definition: arp.c:66
l2input_main_t l2input_main
Definition: l2_input.c:128
static vlib_node_registration_t arp_input_node
(constructor) VLIB_REGISTER_NODE (arp_input_node)
Definition: arp.c:1660
#define FIB_NODE_INDEX_INVALID
Definition: fib_types.h:31
int vnet_proxy_arp_fib_reset(u32 fib_id)
Definition: arp.c:2498
fib_node_index_t fib_entry_index
The index of the adj-fib entry created.
Definition: arp.h:38
#define vec_len(v)
Number of elements in vector (rvalue-only, NULL tolerant)
ip_lookup_next_t lookup_next_index
Next hop after ip4-lookup.
Definition: adj.h:236
#define hash_foreach_pair(p, v, body)
Iterate over hash pairs.
Definition: hash.h:373
Definition: fib_entry.h:282
VLIB buffer representation.
Definition: buffer.h:102
u64 uword
Definition: types.h:112
format_function_t format_vlib_time
Definition: node_funcs.h:1145
#define vec_sort_with_function(vec, f)
Sort a vector using the supplied element comparison function.
Definition: vec.h:983
#define ETHERNET_ARP_ARGS_WC_PUB
Definition: arp.c:125
static u8 * format_arp_term_input_trace(u8 *s, va_list *va)
Definition: arp.c:302
static int vnet_arp_flush_ip4_over_ethernet_internal(vnet_main_t *vnm, vnet_arp_set_ip4_over_ethernet_rpc_args_t *args)
Definition: arp.c:2014
vnet_sw_interface_t * sw_interfaces
Definition: interface.h:837
static void * vlib_frame_vector_args(vlib_frame_t *f)
Get pointer to frame vector data.
Definition: node_funcs.h:244
static u8 * format_ethernet_arp_hardware_type(u8 *s, va_list *va)
Definition: arp.c:138
u8 * ethernet_build_rewrite(vnet_main_t *vnm, u32 sw_if_index, vnet_link_t link_type, const void *dst_address)
build a rewrite string to use for sending packets of type &#39;link_type&#39; to &#39;dst_address&#39; ...
Definition: interface.c:81
l2_bridge_domain_t * bd_configs
Definition: l2_input.h:65
static void arp_entry_free(ethernet_arp_interface_t *eai, ethernet_arp_ip4_entry_t *e)
Definition: arp.c:2230
pg_edit_t opcode
Definition: arp.c:1871
static uword arp_proxy(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
Definition: arp.c:1549
arp_term_next_t
Definition: arp.c:2730
static void vnet_arp_wc_publish_internal(vnet_main_t *vnm, vnet_arp_set_ip4_over_ethernet_rpc_args_t *args)
Definition: arp.c:1984
struct clib_bihash_value offset
template key/value backing page structure
mac_address_t mac
Definition: arp.h:96
u32 limit_arp_cache_size
Definition: arp.c:98
static uword ip6_address_is_unspecified(const ip6_address_t *a)
Definition: ip6_packet.h:310
ip4_address_t ip
Definition: arp.h:95
ip4_address_t lo_addr
Definition: arp.c:65
#define vnet_buffer(b)
Definition: buffer.h:365
u8 * format_unformat_error(u8 *s, va_list *va)
Definition: unformat.c:91
enum arp_disabled_next_t_ arp_disabled_next_t
ip4_main_t ip4_main
Global ip4 main structure.
Definition: ip4_forward.c:1076
uword node_index
Definition: arp.c:73
u8 * format_mac_address_t(u8 *s, va_list *args)
Definition: mac_address.c:27
#define vec_foreach(var, vec)
Vector iterator.
arp_change_event_cb_t data_callback
Definition: arp.c:77
uword * mac_by_ip4
Definition: l2_bd.h:101
u16 flags
Copy of main node flags.
Definition: node.h:509
static int arp_unnumbered(vlib_buffer_t *p0, u32 input_sw_if_index, u32 conn_sw_if_index)
Definition: arp.c:993
ethernet_arp_ip4_entry_t * ip4_neighbor_entries(u32 sw_if_index)
Definition: arp.c:1786
uword wc_ip4_arp_publisher_node
Definition: arp.c:106
VNET_SW_INTERFACE_ADD_DEL_FUNCTION(vnet_arp_delete_sw_interface)
#define VLIB_NODE_FLAG_TRACE
Definition: node.h:302
arp_disabled_next_t_
Definition: arp.c:1103
static uword unformat_ethernet_arp_opcode_net_byte_order(unformat_input_t *input, va_list *args)
Definition: arp.c:202
void adj_nbr_update_rewrite(adj_index_t adj_index, adj_nbr_rewrite_flag_t flags, u8 *rewrite)
adj_nbr_update_rewrite
Definition: adj_nbr.c:298
void ethernet_arp_change_mac(u32 sw_if_index)
Definition: arp.c:2991
void vlib_cli_output(vlib_main_t *vm, char *fmt,...)
Definition: cli.c:772
ethernet_arp_ip4_entry_t * ip4_entry_pool
Definition: arp.c:94
#define VLIB_INITS(...)
Definition: init.h:344
static vlib_buffer_t * vlib_get_buffer(vlib_main_t *vm, u32 buffer_index)
Translate buffer index into buffer pointer.
Definition: buffer_funcs.h:85
Definition: pg.h:312
const u8 * ethernet_ip4_mcast_dst_addr(void)
Definition: interface.c:57
uword unformat(unformat_input_t *i, const char *fmt,...)
Definition: unformat.c:978
int vnet_ip6_nd_term(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_buffer_t *p0, ethernet_header_t *eth, ip6_header_t *ip, u32 sw_if_index, u16 bd_index)
Definition: defs.h:46
int vnet_feature_enable_disable(const char *arc_name, const char *node_name, u32 sw_if_index, int enable_disable, void *feature_config, u32 n_feature_config_bytes)
Definition: feature.c:275
static uword unformat_check_input(unformat_input_t *i)
Definition: format.h:171
Definition: arp.h:24
static adj_walk_rc_t arp_mk_incomplete_walk(adj_index_t ai, void *ctx)
Definition: arp.c:436
static_always_inline void vnet_feature_arc_start(u8 arc, u32 sw_if_index, u32 *next0, vlib_buffer_t *b0)
Definition: feature.h:282
static ip4_address_t * ip4_interface_address_matching_destination(ip4_main_t *im, ip4_address_t *dst, u32 sw_if_index, ip_interface_address_t **result_ia)
Definition: ip4.h:234
static uword pool_elts(void *v)
Number of active elements in a pool.
Definition: pool.h:128