FD.io VPP  v19.01.3-6-g70449b9b9
Vector Packet Processing
ip6_forward.c
Go to the documentation of this file.
1 /*
2  * Copyright (c) 2016 Cisco and/or its affiliates.
3  * Licensed under the Apache License, Version 2.0 (the "License");
4  * you may not use this file except in compliance with the License.
5  * You may obtain a copy of the License at:
6  *
7  * http://www.apache.org/licenses/LICENSE-2.0
8  *
9  * Unless required by applicable law or agreed to in writing, software
10  * distributed under the License is distributed on an "AS IS" BASIS,
11  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12  * See the License for the specific language governing permissions and
13  * limitations under the License.
14  */
15 /*
16  * ip/ip6_forward.c: IP v6 forwarding
17  *
18  * Copyright (c) 2008 Eliot Dresselhaus
19  *
20  * Permission is hereby granted, free of charge, to any person obtaining
21  * a copy of this software and associated documentation files (the
22  * "Software"), to deal in the Software without restriction, including
23  * without limitation the rights to use, copy, modify, merge, publish,
24  * distribute, sublicense, and/or sell copies of the Software, and to
25  * permit persons to whom the Software is furnished to do so, subject to
26  * the following conditions:
27  *
28  * The above copyright notice and this permission notice shall be
29  * included in all copies or substantial portions of the Software.
30  *
31  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
32  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
33  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
34  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
35  * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
36  * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
37  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
38  */
39 
40 #include <vnet/vnet.h>
41 #include <vnet/ip/ip.h>
42 #include <vnet/ip/ip_frag.h>
43 #include <vnet/ip/ip6_neighbor.h>
44 #include <vnet/ethernet/ethernet.h> /* for ethernet_header_t */
45 #include <vnet/srp/srp.h> /* for srp_hw_interface_class */
46 #include <vppinfra/cache.h>
47 #include <vnet/fib/fib_urpf_list.h> /* for FIB uRPF check */
48 #include <vnet/fib/ip6_fib.h>
49 #include <vnet/mfib/ip6_mfib.h>
51 #include <vnet/dpo/classify_dpo.h>
52 
54 #include <vnet/ip/ip6_forward.h>
55 
56 /* Flag used by IOAM code. Classifier sets it pop-hop-by-hop checks it */
57 #define OI_DECAP 0x80000000
58 
59 static void
61  ip6_main_t * im, u32 fib_index,
63 {
64  ip_lookup_main_t *lm = &im->lookup_main;
66  fib_prefix_t pfx = {
67  .fp_len = a->address_length,
68  .fp_proto = FIB_PROTOCOL_IP6,
69  .fp_addr.ip6 = *address,
70  };
71 
72  if (a->address_length < 128)
73  {
75  &pfx,
80  /* No next-hop address */
81  NULL, sw_if_index,
82  /* invalid FIB index */
83  ~0, 1,
84  /* no label stack */
86  }
87 
88  pfx.fp_len = 128;
89  if (sw_if_index < vec_len (lm->classify_table_index_by_sw_if_index))
90  {
91  u32 classify_table_index =
93  if (classify_table_index != (u32) ~ 0)
94  {
95  dpo_id_t dpo = DPO_INVALID;
96 
97  dpo_set (&dpo,
100  classify_dpo_create (DPO_PROTO_IP6, classify_table_index));
101 
103  &pfx,
105  FIB_ENTRY_FLAG_NONE, &dpo);
106  dpo_reset (&dpo);
107  }
108  }
109 
110  fib_table_entry_update_one_path (fib_index, &pfx,
115  &pfx.fp_addr,
116  sw_if_index, ~0,
118 }
119 
120 static void
122  u32 fib_index,
124 {
125  fib_prefix_t pfx = {
127  .fp_proto = FIB_PROTOCOL_IP6,
128  .fp_addr.ip6 = *address,
129  };
130 
131  if (pfx.fp_len < 128)
132  {
133  fib_table_entry_delete (fib_index, &pfx, FIB_SOURCE_INTERFACE);
134 
135  }
136 
137  pfx.fp_len = 128;
138  fib_table_entry_delete (fib_index, &pfx, FIB_SOURCE_INTERFACE);
139 }
140 
141 void
143 {
144  ip6_main_t *im = &ip6_main;
145 
147 
148  /*
149  * enable/disable only on the 1<->0 transition
150  */
151  if (is_enable)
152  {
153  if (1 != ++im->ip_enabled_by_sw_if_index[sw_if_index])
154  return;
155  }
156  else
157  {
158  /* The ref count is 0 when an address is removed from an interface that has
159  * no address - this is not a ciritical error */
160  if (0 == im->ip_enabled_by_sw_if_index[sw_if_index] ||
161  0 != --im->ip_enabled_by_sw_if_index[sw_if_index])
162  return;
163  }
164 
165  vnet_feature_enable_disable ("ip6-unicast", "ip6-not-enabled", sw_if_index,
166  !is_enable, 0, 0);
167 
168  vnet_feature_enable_disable ("ip6-multicast", "ip6-not-enabled",
169  sw_if_index, !is_enable, 0, 0);
170 }
171 
172 /* get first interface address */
175 {
176  ip_lookup_main_t *lm = &im->lookup_main;
177  ip_interface_address_t *ia = 0;
178  ip6_address_t *result = 0;
179 
180  /* *INDENT-OFF* */
181  foreach_ip_interface_address (lm, ia, sw_if_index,
182  1 /* honor unnumbered */,
183  ({
185  result = a;
186  break;
187  }));
188  /* *INDENT-ON* */
189  return result;
190 }
191 
192 clib_error_t *
196  u32 address_length, u32 is_del)
197 {
198  vnet_main_t *vnm = vnet_get_main ();
199  ip6_main_t *im = &ip6_main;
200  ip_lookup_main_t *lm = &im->lookup_main;
201  clib_error_t *error;
202  u32 if_address_index;
203  ip6_address_fib_t ip6_af, *addr_fib = 0;
204  ip6_address_t ll_addr;
205 
206  /* local0 interface doesn't support IP addressing */
207  if (sw_if_index == 0)
208  {
209  return
210  clib_error_create ("local0 interface doesn't support IP addressing");
211  }
212 
213  if (ip6_address_is_link_local_unicast (address))
214  {
215  if (address_length != 128)
216  {
217  vnm->api_errno = VNET_API_ERROR_ADDRESS_LENGTH_MISMATCH;
218  return
220  ("prefix length of link-local address must be 128");
221  }
222  if (!is_del)
223  {
224  return ip6_neighbor_set_link_local_address (vm, sw_if_index,
225  address);
226  }
227  else
228  {
229  ll_addr = ip6_neighbor_get_link_local_address (sw_if_index);
230  if (ip6_address_is_equal (&ll_addr, address))
231  {
232  vnm->api_errno = VNET_API_ERROR_ADDRESS_NOT_DELETABLE;
233  return clib_error_create ("address not deletable");
234  }
235  else
236  {
237  vnm->api_errno = VNET_API_ERROR_ADDRESS_NOT_FOUND_FOR_INTERFACE;
238  return clib_error_create ("address not found");
239  }
240  }
241  }
242 
243  vec_validate (im->fib_index_by_sw_if_index, sw_if_index);
244  vec_validate (im->mfib_index_by_sw_if_index, sw_if_index);
245 
246  ip6_addr_fib_init (&ip6_af, address,
247  vec_elt (im->fib_index_by_sw_if_index, sw_if_index));
248  vec_add1 (addr_fib, ip6_af);
249 
250  /* *INDENT-OFF* */
251  if (!is_del)
252  {
253  /* When adding an address check that it does not conflict
254  with an existing address on any interface in this table. */
256  vnet_sw_interface_t *sif;
257 
259  ({
260  if (im->fib_index_by_sw_if_index[sw_if_index] ==
261  im->fib_index_by_sw_if_index[sif->sw_if_index])
262  {
263  foreach_ip_interface_address
264  (&im->lookup_main, ia, sif->sw_if_index,
265  0 /* honor unnumbered */ ,
266  ({
267  ip6_address_t * x =
268  ip_interface_address_get_address
269  (&im->lookup_main, ia);
270  if (ip6_destination_matches_route
271  (im, address, x, ia->address_length) ||
272  ip6_destination_matches_route (im,
273  x,
274  address,
275  address_length))
276  {
277  vnm->api_errno = VNET_API_ERROR_DUPLICATE_IF_ADDRESS;
278  return
279  clib_error_create
280  ("failed to add %U which conflicts with %U for interface %U",
281  format_ip6_address_and_length, address,
282  address_length,
283  format_ip6_address_and_length, x,
284  ia->address_length,
285  format_vnet_sw_if_index_name, vnm,
286  sif->sw_if_index);
287  }
288  }));
289  }
290  }));
291  }
292  /* *INDENT-ON* */
293 
294  {
295  uword elts_before = pool_elts (lm->if_address_pool);
296 
298  (lm, sw_if_index, addr_fib, address_length, is_del, &if_address_index);
299  if (error)
300  goto done;
301 
302  /* Pool did not grow: add duplicate address. */
303  if (elts_before == pool_elts (lm->if_address_pool))
304  goto done;
305  }
306 
308 
309  if (is_del)
310  ip6_del_interface_routes (im, ip6_af.fib_index, address, address_length);
311  else
313  im, ip6_af.fib_index,
314  pool_elt_at_index (lm->if_address_pool,
315  if_address_index));
316 
317  {
319  vec_foreach (cb, im->add_del_interface_address_callbacks)
320  cb->function (im, cb->function_opaque, sw_if_index,
321  address, address_length, if_address_index, is_del);
322  }
323 
324 done:
325  vec_free (addr_fib);
326  return error;
327 }
328 
329 clib_error_t *
331 {
332  ip6_main_t *im = &ip6_main;
334  ip6_address_t *a;
335  u32 is_admin_up, fib_index;
336 
337  /* Fill in lookup tables with default table (0). */
338  vec_validate (im->fib_index_by_sw_if_index, sw_if_index);
339 
341  lookup_main.if_address_pool_index_by_sw_if_index,
342  sw_if_index, ~0);
343 
344  is_admin_up = (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) != 0;
345 
346  fib_index = vec_elt (im->fib_index_by_sw_if_index, sw_if_index);
347 
348  /* *INDENT-OFF* */
349  foreach_ip_interface_address (&im->lookup_main, ia, sw_if_index,
350  0 /* honor unnumbered */,
351  ({
352  a = ip_interface_address_get_address (&im->lookup_main, ia);
353  if (is_admin_up)
354  ip6_add_interface_routes (vnm, sw_if_index,
355  im, fib_index,
356  ia);
357  else
358  ip6_del_interface_routes (im, fib_index,
359  a, ia->address_length);
360  }));
361  /* *INDENT-ON* */
362 
363  return 0;
364 }
365 
367 
368 /* Built-in ip6 unicast rx feature path definition */
369 /* *INDENT-OFF* */
370 VNET_FEATURE_ARC_INIT (ip6_unicast, static) =
371 {
372  .arc_name = "ip6-unicast",
373  .start_nodes = VNET_FEATURES ("ip6-input"),
374  .last_in_arc = "ip6-lookup",
375  .arc_index_ptr = &ip6_main.lookup_main.ucast_feature_arc_index,
376 };
377 
379 {
380  .arc_name = "ip6-unicast",
381  .node_name = "ip6-flow-classify",
382  .runs_before = VNET_FEATURES ("ip6-inacl"),
383 };
384 
385 VNET_FEATURE_INIT (ip6_inacl, static) =
386 {
387  .arc_name = "ip6-unicast",
388  .node_name = "ip6-inacl",
389  .runs_before = VNET_FEATURES ("ip6-policer-classify"),
390 };
391 
393 {
394  .arc_name = "ip6-unicast",
395  .node_name = "ip6-policer-classify",
396  .runs_before = VNET_FEATURES ("ipsec6-input-feature"),
397 };
398 
399 VNET_FEATURE_INIT (ip6_ipsec, static) =
400 {
401  .arc_name = "ip6-unicast",
402  .node_name = "ipsec6-input-feature",
403  .runs_before = VNET_FEATURES ("l2tp-decap"),
404 };
405 
406 VNET_FEATURE_INIT (ip6_l2tp, static) =
407 {
408  .arc_name = "ip6-unicast",
409  .node_name = "l2tp-decap",
410  .runs_before = VNET_FEATURES ("vpath-input-ip6"),
411 };
412 
413 VNET_FEATURE_INIT (ip6_vpath, static) =
414 {
415  .arc_name = "ip6-unicast",
416  .node_name = "vpath-input-ip6",
417  .runs_before = VNET_FEATURES ("ip6-vxlan-bypass"),
418 };
419 
420 VNET_FEATURE_INIT (ip6_vxlan_bypass, static) =
421 {
422  .arc_name = "ip6-unicast",
423  .node_name = "ip6-vxlan-bypass",
424  .runs_before = VNET_FEATURES ("ip6-lookup"),
425 };
426 
428 {
429  .arc_name = "ip6-unicast",
430  .node_name = "ip6-not-enabled",
431  .runs_before = VNET_FEATURES ("ip6-lookup"),
432 };
433 
434 VNET_FEATURE_INIT (ip6_lookup, static) =
435 {
436  .arc_name = "ip6-unicast",
437  .node_name = "ip6-lookup",
438  .runs_before = 0, /*last feature*/
439 };
440 
441 /* Built-in ip6 multicast rx feature path definition (none now) */
442 VNET_FEATURE_ARC_INIT (ip6_multicast, static) =
443 {
444  .arc_name = "ip6-multicast",
445  .start_nodes = VNET_FEATURES ("ip6-input"),
446  .last_in_arc = "ip6-mfib-forward-lookup",
447  .arc_index_ptr = &ip6_main.lookup_main.mcast_feature_arc_index,
448 };
449 
450 VNET_FEATURE_INIT (ip6_vpath_mc, static) = {
451  .arc_name = "ip6-multicast",
452  .node_name = "vpath-input-ip6",
453  .runs_before = VNET_FEATURES ("ip6-mfib-forward-lookup"),
454 };
455 
456 VNET_FEATURE_INIT (ip6_not_enabled_mc, static) = {
457  .arc_name = "ip6-multicast",
458  .node_name = "ip6-not-enabled",
459  .runs_before = VNET_FEATURES ("ip6-mfib-forward-lookup"),
460 };
461 
462 VNET_FEATURE_INIT (ip6_mc_lookup, static) = {
463  .arc_name = "ip6-multicast",
464  .node_name = "ip6-mfib-forward-lookup",
465  .runs_before = 0, /* last feature */
466 };
467 
468 /* Built-in ip4 tx feature path definition */
469 VNET_FEATURE_ARC_INIT (ip6_output, static) =
470 {
471  .arc_name = "ip6-output",
472  .start_nodes = VNET_FEATURES ("ip6-rewrite", "ip6-midchain", "ip6-dvr-dpo"),
473  .last_in_arc = "interface-output",
475 };
476 
477 VNET_FEATURE_INIT (ip6_outacl, static) = {
478  .arc_name = "ip6-output",
479  .node_name = "ip6-outacl",
480  .runs_before = VNET_FEATURES ("ipsec6-output-feature"),
481 };
482 
483 VNET_FEATURE_INIT (ip6_ipsec_output, static) = {
484  .arc_name = "ip6-output",
485  .node_name = "ipsec6-output-feature",
486  .runs_before = VNET_FEATURES ("interface-output"),
487 };
488 
489 VNET_FEATURE_INIT (ip6_interface_output, static) = {
490  .arc_name = "ip6-output",
491  .node_name = "interface-output",
492  .runs_before = 0, /* not before any other features */
493 };
494 /* *INDENT-ON* */
495 
496 clib_error_t *
498 {
499  ip6_main_t *im = &ip6_main;
500 
501  vec_validate (im->fib_index_by_sw_if_index, sw_if_index);
502  vec_validate (im->mfib_index_by_sw_if_index, sw_if_index);
503 
504  if (!is_add)
505  {
506  /* Ensure that IPv6 is disabled */
507  ip6_main_t *im6 = &ip6_main;
508  ip_lookup_main_t *lm6 = &im6->lookup_main;
509  ip_interface_address_t *ia = 0;
512 
513  ip6_neighbor_sw_interface_add_del (vnm, sw_if_index, 0 /* is_add */ );
514  vnet_sw_interface_update_unnumbered (sw_if_index, ~0, 0);
515  /* *INDENT-OFF* */
516  foreach_ip_interface_address (lm6, ia, sw_if_index, 0,
517  ({
518  address = ip_interface_address_get_address (lm6, ia);
519  ip6_add_del_interface_address(vm, sw_if_index, address, ia->address_length, 1);
520  }));
521  /* *INDENT-ON* */
522  ip6_mfib_interface_enable_disable (sw_if_index, 0);
523  }
524 
525  vnet_feature_enable_disable ("ip6-unicast", "ip6-not-enabled", sw_if_index,
526  is_add, 0, 0);
527 
528  vnet_feature_enable_disable ("ip6-multicast", "ip6-not-enabled",
529  sw_if_index, is_add, 0, 0);
530 
531  return /* no error */ 0;
532 }
533 
535 
536 static uword
538  vlib_node_runtime_t * node, vlib_frame_t * frame)
539 {
540  return ip6_lookup_inline (vm, node, frame);
541 }
542 
543 static u8 *format_ip6_lookup_trace (u8 * s, va_list * args);
544 
545 /* *INDENT-OFF* */
547 {
548  .function = ip6_lookup,
549  .name = "ip6-lookup",
550  .vector_size = sizeof (u32),
551  .format_trace = format_ip6_lookup_trace,
552  .n_next_nodes = IP6_LOOKUP_N_NEXT,
553  .next_nodes = IP6_LOOKUP_NEXT_NODES,
554 };
555 /* *INDENT-ON* */
556 
558 
559 static uword
561  vlib_node_runtime_t * node, vlib_frame_t * frame)
562 {
564  u32 n_left_from, n_left_to_next, *from, *to_next;
565  ip_lookup_next_t next;
566  u32 thread_index = vm->thread_index;
567  ip6_main_t *im = &ip6_main;
568 
569  from = vlib_frame_vector_args (frame);
570  n_left_from = frame->n_vectors;
571  next = node->cached_next_index;
572 
573  while (n_left_from > 0)
574  {
575  vlib_get_next_frame (vm, node, next, to_next, n_left_to_next);
576 
577 
578  while (n_left_from >= 4 && n_left_to_next >= 2)
579  {
580  ip_lookup_next_t next0, next1;
581  const load_balance_t *lb0, *lb1;
582  vlib_buffer_t *p0, *p1;
583  u32 pi0, lbi0, hc0, pi1, lbi1, hc1;
584  const ip6_header_t *ip0, *ip1;
585  const dpo_id_t *dpo0, *dpo1;
586 
587  /* Prefetch next iteration. */
588  {
589  vlib_buffer_t *p2, *p3;
590 
591  p2 = vlib_get_buffer (vm, from[2]);
592  p3 = vlib_get_buffer (vm, from[3]);
593 
594  vlib_prefetch_buffer_header (p2, STORE);
595  vlib_prefetch_buffer_header (p3, STORE);
596 
597  CLIB_PREFETCH (p2->data, sizeof (ip0[0]), STORE);
598  CLIB_PREFETCH (p3->data, sizeof (ip0[0]), STORE);
599  }
600 
601  pi0 = to_next[0] = from[0];
602  pi1 = to_next[1] = from[1];
603 
604  from += 2;
605  n_left_from -= 2;
606  to_next += 2;
607  n_left_to_next -= 2;
608 
609  p0 = vlib_get_buffer (vm, pi0);
610  p1 = vlib_get_buffer (vm, pi1);
611 
612  ip0 = vlib_buffer_get_current (p0);
613  ip1 = vlib_buffer_get_current (p1);
614  lbi0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
615  lbi1 = vnet_buffer (p1)->ip.adj_index[VLIB_TX];
616 
617  lb0 = load_balance_get (lbi0);
618  lb1 = load_balance_get (lbi1);
619 
620  /*
621  * this node is for via FIBs we can re-use the hash value from the
622  * to node if present.
623  * We don't want to use the same hash value at each level in the recursion
624  * graph as that would lead to polarisation
625  */
626  hc0 = hc1 = 0;
627 
628  if (PREDICT_FALSE (lb0->lb_n_buckets > 1))
629  {
630  if (PREDICT_TRUE (vnet_buffer (p0)->ip.flow_hash))
631  {
632  hc0 = vnet_buffer (p0)->ip.flow_hash =
633  vnet_buffer (p0)->ip.flow_hash >> 1;
634  }
635  else
636  {
637  hc0 = vnet_buffer (p0)->ip.flow_hash =
639  }
640  dpo0 =
642  (hc0 &
643  lb0->lb_n_buckets_minus_1));
644  }
645  else
646  {
647  dpo0 = load_balance_get_bucket_i (lb0, 0);
648  }
649  if (PREDICT_FALSE (lb1->lb_n_buckets > 1))
650  {
651  if (PREDICT_TRUE (vnet_buffer (p1)->ip.flow_hash))
652  {
653  hc1 = vnet_buffer (p1)->ip.flow_hash =
654  vnet_buffer (p1)->ip.flow_hash >> 1;
655  }
656  else
657  {
658  hc1 = vnet_buffer (p1)->ip.flow_hash =
660  }
661  dpo1 =
663  (hc1 &
664  lb1->lb_n_buckets_minus_1));
665  }
666  else
667  {
668  dpo1 = load_balance_get_bucket_i (lb1, 0);
669  }
670 
671  next0 = dpo0->dpoi_next_node;
672  next1 = dpo1->dpoi_next_node;
673 
674  /* Only process the HBH Option Header if explicitly configured to do so */
675  if (PREDICT_FALSE
676  (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
677  {
678  next0 = (dpo_is_adj (dpo0) && im->hbh_enabled) ?
680  }
681  /* Only process the HBH Option Header if explicitly configured to do so */
682  if (PREDICT_FALSE
683  (ip1->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
684  {
685  next1 = (dpo_is_adj (dpo1) && im->hbh_enabled) ?
687  }
688 
689  vnet_buffer (p0)->ip.adj_index[VLIB_TX] = dpo0->dpoi_index;
690  vnet_buffer (p1)->ip.adj_index[VLIB_TX] = dpo1->dpoi_index;
691 
693  (cm, thread_index, lbi0, 1, vlib_buffer_length_in_chain (vm, p0));
695  (cm, thread_index, lbi1, 1, vlib_buffer_length_in_chain (vm, p1));
696 
697  vlib_validate_buffer_enqueue_x2 (vm, node, next,
698  to_next, n_left_to_next,
699  pi0, pi1, next0, next1);
700  }
701 
702  while (n_left_from > 0 && n_left_to_next > 0)
703  {
704  ip_lookup_next_t next0;
705  const load_balance_t *lb0;
706  vlib_buffer_t *p0;
707  u32 pi0, lbi0, hc0;
708  const ip6_header_t *ip0;
709  const dpo_id_t *dpo0;
710 
711  pi0 = from[0];
712  to_next[0] = pi0;
713  from += 1;
714  to_next += 1;
715  n_left_to_next -= 1;
716  n_left_from -= 1;
717 
718  p0 = vlib_get_buffer (vm, pi0);
719 
720  ip0 = vlib_buffer_get_current (p0);
721  lbi0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
722 
723  lb0 = load_balance_get (lbi0);
724 
725  hc0 = 0;
726  if (PREDICT_FALSE (lb0->lb_n_buckets > 1))
727  {
728  if (PREDICT_TRUE (vnet_buffer (p0)->ip.flow_hash))
729  {
730  hc0 = vnet_buffer (p0)->ip.flow_hash =
731  vnet_buffer (p0)->ip.flow_hash >> 1;
732  }
733  else
734  {
735  hc0 = vnet_buffer (p0)->ip.flow_hash =
737  }
738  dpo0 =
740  (hc0 &
741  lb0->lb_n_buckets_minus_1));
742  }
743  else
744  {
745  dpo0 = load_balance_get_bucket_i (lb0, 0);
746  }
747 
748  next0 = dpo0->dpoi_next_node;
749  vnet_buffer (p0)->ip.adj_index[VLIB_TX] = dpo0->dpoi_index;
750 
751  /* Only process the HBH Option Header if explicitly configured to do so */
752  if (PREDICT_FALSE
753  (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
754  {
755  next0 = (dpo_is_adj (dpo0) && im->hbh_enabled) ?
757  }
758 
760  (cm, thread_index, lbi0, 1, vlib_buffer_length_in_chain (vm, p0));
761 
762  vlib_validate_buffer_enqueue_x1 (vm, node, next,
763  to_next, n_left_to_next,
764  pi0, next0);
765  }
766 
767  vlib_put_next_frame (vm, node, next, n_left_to_next);
768  }
769 
770  if (node->flags & VLIB_NODE_FLAG_TRACE)
771  ip6_forward_next_trace (vm, node, frame, VLIB_TX);
772 
773  return frame->n_vectors;
774 }
775 
776 /* *INDENT-OFF* */
778 {
779  .function = ip6_load_balance,
780  .name = "ip6-load-balance",
781  .vector_size = sizeof (u32),
782  .sibling_of = "ip6-lookup",
783  .format_trace = format_ip6_lookup_trace,
784 };
785 /* *INDENT-ON* */
786 
788 
789 typedef struct
790 {
791  /* Adjacency taken. */
795 
796  /* Packet data, possibly *after* rewrite. */
797  u8 packet_data[128 - 1 * sizeof (u32)];
798 }
800 
801 u8 *
802 format_ip6_forward_next_trace (u8 * s, va_list * args)
803 {
804  CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
805  CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
806  ip6_forward_next_trace_t *t = va_arg (*args, ip6_forward_next_trace_t *);
807  u32 indent = format_get_indent (s);
808 
809  s = format (s, "%U%U",
810  format_white_space, indent,
811  format_ip6_header, t->packet_data, sizeof (t->packet_data));
812  return s;
813 }
814 
815 static u8 *
816 format_ip6_lookup_trace (u8 * s, va_list * args)
817 {
818  CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
819  CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
820  ip6_forward_next_trace_t *t = va_arg (*args, ip6_forward_next_trace_t *);
821  u32 indent = format_get_indent (s);
822 
823  s = format (s, "fib %d dpo-idx %d flow hash: 0x%08x",
824  t->fib_index, t->adj_index, t->flow_hash);
825  s = format (s, "\n%U%U",
826  format_white_space, indent,
827  format_ip6_header, t->packet_data, sizeof (t->packet_data));
828  return s;
829 }
830 
831 
832 static u8 *
833 format_ip6_rewrite_trace (u8 * s, va_list * args)
834 {
835  CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
836  CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
837  ip6_forward_next_trace_t *t = va_arg (*args, ip6_forward_next_trace_t *);
838  u32 indent = format_get_indent (s);
839 
840  s = format (s, "tx_sw_if_index %d adj-idx %d : %U flow hash: 0x%08x",
843  s = format (s, "\n%U%U",
844  format_white_space, indent,
846  t->adj_index, t->packet_data, sizeof (t->packet_data));
847  return s;
848 }
849 
850 /* Common trace function for all ip6-forward next nodes. */
851 void
853  vlib_node_runtime_t * node,
854  vlib_frame_t * frame, vlib_rx_or_tx_t which_adj_index)
855 {
856  u32 *from, n_left;
857  ip6_main_t *im = &ip6_main;
858 
859  n_left = frame->n_vectors;
860  from = vlib_frame_vector_args (frame);
861 
862  while (n_left >= 4)
863  {
864  u32 bi0, bi1;
865  vlib_buffer_t *b0, *b1;
866  ip6_forward_next_trace_t *t0, *t1;
867 
868  /* Prefetch next iteration. */
869  vlib_prefetch_buffer_with_index (vm, from[2], LOAD);
870  vlib_prefetch_buffer_with_index (vm, from[3], LOAD);
871 
872  bi0 = from[0];
873  bi1 = from[1];
874 
875  b0 = vlib_get_buffer (vm, bi0);
876  b1 = vlib_get_buffer (vm, bi1);
877 
878  if (b0->flags & VLIB_BUFFER_IS_TRACED)
879  {
880  t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
881  t0->adj_index = vnet_buffer (b0)->ip.adj_index[which_adj_index];
882  t0->flow_hash = vnet_buffer (b0)->ip.flow_hash;
883  t0->fib_index =
884  (vnet_buffer (b0)->sw_if_index[VLIB_TX] !=
885  (u32) ~ 0) ? vnet_buffer (b0)->sw_if_index[VLIB_TX] :
888 
891  sizeof (t0->packet_data));
892  }
893  if (b1->flags & VLIB_BUFFER_IS_TRACED)
894  {
895  t1 = vlib_add_trace (vm, node, b1, sizeof (t1[0]));
896  t1->adj_index = vnet_buffer (b1)->ip.adj_index[which_adj_index];
897  t1->flow_hash = vnet_buffer (b1)->ip.flow_hash;
898  t1->fib_index =
899  (vnet_buffer (b1)->sw_if_index[VLIB_TX] !=
900  (u32) ~ 0) ? vnet_buffer (b1)->sw_if_index[VLIB_TX] :
903 
906  sizeof (t1->packet_data));
907  }
908  from += 2;
909  n_left -= 2;
910  }
911 
912  while (n_left >= 1)
913  {
914  u32 bi0;
915  vlib_buffer_t *b0;
916  ip6_forward_next_trace_t *t0;
917 
918  bi0 = from[0];
919 
920  b0 = vlib_get_buffer (vm, bi0);
921 
922  if (b0->flags & VLIB_BUFFER_IS_TRACED)
923  {
924  t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
925  t0->adj_index = vnet_buffer (b0)->ip.adj_index[which_adj_index];
926  t0->flow_hash = vnet_buffer (b0)->ip.flow_hash;
927  t0->fib_index =
928  (vnet_buffer (b0)->sw_if_index[VLIB_TX] !=
929  (u32) ~ 0) ? vnet_buffer (b0)->sw_if_index[VLIB_TX] :
932 
935  sizeof (t0->packet_data));
936  }
937  from += 1;
938  n_left -= 1;
939  }
940 }
941 
942 /* Compute TCP/UDP/ICMP6 checksum in software. */
943 u16
945  ip6_header_t * ip0, int *bogus_lengthp)
946 {
947  ip_csum_t sum0;
948  u16 sum16, payload_length_host_byte_order;
949  u32 i, n_this_buffer, n_bytes_left;
950  u32 headers_size = sizeof (ip0[0]);
951  void *data_this_buffer;
952 
953  ASSERT (bogus_lengthp);
954  *bogus_lengthp = 0;
955 
956  /* Initialize checksum with ip header. */
957  sum0 = ip0->payload_length + clib_host_to_net_u16 (ip0->protocol);
958  payload_length_host_byte_order = clib_net_to_host_u16 (ip0->payload_length);
959  data_this_buffer = (void *) (ip0 + 1);
960 
961  for (i = 0; i < ARRAY_LEN (ip0->src_address.as_uword); i++)
962  {
963  sum0 = ip_csum_with_carry (sum0,
964  clib_mem_unaligned (&ip0->
965  src_address.as_uword[i],
966  uword));
967  sum0 =
968  ip_csum_with_carry (sum0,
970  uword));
971  }
972 
973  /* some icmp packets may come with a "router alert" hop-by-hop extension header (e.g., mldv2 packets)
974  * or UDP-Ping packets */
975  if (PREDICT_FALSE (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
976  {
977  u32 skip_bytes;
978  ip6_hop_by_hop_ext_t *ext_hdr =
979  (ip6_hop_by_hop_ext_t *) data_this_buffer;
980 
981  /* validate really icmp6 next */
982  ASSERT ((ext_hdr->next_hdr == IP_PROTOCOL_ICMP6)
983  || (ext_hdr->next_hdr == IP_PROTOCOL_UDP));
984 
985  skip_bytes = 8 * (1 + ext_hdr->n_data_u64s);
986  data_this_buffer = (void *) ((u8 *) data_this_buffer + skip_bytes);
987 
988  payload_length_host_byte_order -= skip_bytes;
989  headers_size += skip_bytes;
990  }
991 
992  n_bytes_left = n_this_buffer = payload_length_host_byte_order;
993  if (p0 && n_this_buffer + headers_size > p0->current_length)
994  n_this_buffer =
995  p0->current_length >
996  headers_size ? p0->current_length - headers_size : 0;
997  while (1)
998  {
999  sum0 = ip_incremental_checksum (sum0, data_this_buffer, n_this_buffer);
1000  n_bytes_left -= n_this_buffer;
1001  if (n_bytes_left == 0)
1002  break;
1003 
1004  if (!(p0->flags & VLIB_BUFFER_NEXT_PRESENT))
1005  {
1006  *bogus_lengthp = 1;
1007  return 0xfefe;
1008  }
1009  p0 = vlib_get_buffer (vm, p0->next_buffer);
1010  data_this_buffer = vlib_buffer_get_current (p0);
1011  n_this_buffer = p0->current_length;
1012  }
1013 
1014  sum16 = ~ip_csum_fold (sum0);
1015 
1016  return sum16;
1017 }
1018 
1019 u32
1021 {
1023  udp_header_t *udp0;
1024  u16 sum16;
1025  int bogus_length;
1026 
1027  /* some icmp packets may come with a "router alert" hop-by-hop extension header (e.g., mldv2 packets) */
1028  ASSERT (ip0->protocol == IP_PROTOCOL_TCP
1029  || ip0->protocol == IP_PROTOCOL_ICMP6
1030  || ip0->protocol == IP_PROTOCOL_UDP
1031  || ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS);
1032 
1033  udp0 = (void *) (ip0 + 1);
1034  if (ip0->protocol == IP_PROTOCOL_UDP && udp0->checksum == 0)
1035  {
1036  p0->flags |= (VNET_BUFFER_F_L4_CHECKSUM_COMPUTED
1037  | VNET_BUFFER_F_L4_CHECKSUM_CORRECT);
1038  return p0->flags;
1039  }
1040 
1041  sum16 = ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip0, &bogus_length);
1042 
1043  p0->flags |= (VNET_BUFFER_F_L4_CHECKSUM_COMPUTED
1044  | ((sum16 == 0) << VNET_BUFFER_F_LOG2_L4_CHECKSUM_CORRECT));
1045 
1046  return p0->flags;
1047 }
1048 
1049 /**
1050  * @brief returns number of links on which src is reachable.
1051  */
1052 always_inline int
1054 {
1055  const load_balance_t *lb0;
1056  index_t lbi;
1057  u32 fib_index;
1058 
1059  fib_index = vec_elt (im->fib_index_by_sw_if_index,
1061  fib_index =
1062  (vnet_buffer (b)->sw_if_index[VLIB_TX] == (u32) ~ 0) ?
1063  fib_index : vnet_buffer (b)->sw_if_index[VLIB_TX];
1064 
1065  lbi = ip6_fib_table_fwding_lookup (im, fib_index, &i->src_address);
1066  lb0 = load_balance_get (lbi);
1067 
1068  return (fib_urpf_check_size (lb0->lb_urpf));
1069 }
1070 
1073  u32 * udp_offset0)
1074 {
1075  u32 proto0;
1076  proto0 = ip6_locate_header (p0, ip0, IP_PROTOCOL_UDP, udp_offset0);
1077  if (proto0 != IP_PROTOCOL_UDP)
1078  {
1079  proto0 = ip6_locate_header (p0, ip0, IP_PROTOCOL_TCP, udp_offset0);
1080  proto0 = (proto0 == IP_PROTOCOL_TCP) ? proto0 : 0;
1081  }
1082  return proto0;
1083 }
1084 
1085 /* *INDENT-OFF* */
1087 {
1088  .arc_name = "ip6-local",
1089  .start_nodes = VNET_FEATURES ("ip6-local"),
1090 };
1091 /* *INDENT-ON* */
1092 
1093 static uword
1095  vlib_frame_t * frame, int head_of_feature_arc)
1096 {
1097  ip6_main_t *im = &ip6_main;
1098  ip_lookup_main_t *lm = &im->lookup_main;
1099  ip_local_next_t next_index;
1100  u32 *from, *to_next, n_left_from, n_left_to_next;
1101  vlib_node_runtime_t *error_node =
1103  u8 arc_index = vnet_feat_arc_ip6_local.feature_arc_index;
1104 
1105  from = vlib_frame_vector_args (frame);
1106  n_left_from = frame->n_vectors;
1107  next_index = node->cached_next_index;
1108 
1109  if (node->flags & VLIB_NODE_FLAG_TRACE)
1110  ip6_forward_next_trace (vm, node, frame, VLIB_TX);
1111 
1112  while (n_left_from > 0)
1113  {
1114  vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1115 
1116  while (n_left_from >= 4 && n_left_to_next >= 2)
1117  {
1118  vlib_buffer_t *p0, *p1;
1119  ip6_header_t *ip0, *ip1;
1120  udp_header_t *udp0, *udp1;
1121  u32 pi0, ip_len0, udp_len0, flags0, next0;
1122  u32 pi1, ip_len1, udp_len1, flags1, next1;
1123  i32 len_diff0, len_diff1;
1124  u8 error0, type0, good_l4_csum0, is_tcp_udp0;
1125  u8 error1, type1, good_l4_csum1, is_tcp_udp1;
1126  u32 udp_offset0, udp_offset1;
1127 
1128  pi0 = to_next[0] = from[0];
1129  pi1 = to_next[1] = from[1];
1130  from += 2;
1131  n_left_from -= 2;
1132  to_next += 2;
1133  n_left_to_next -= 2;
1134 
1135  error0 = error1 = IP6_ERROR_UNKNOWN_PROTOCOL;
1136 
1137  p0 = vlib_get_buffer (vm, pi0);
1138  p1 = vlib_get_buffer (vm, pi1);
1139 
1140  ip0 = vlib_buffer_get_current (p0);
1141  ip1 = vlib_buffer_get_current (p1);
1142 
1143  if (head_of_feature_arc == 0)
1144  goto skip_checks;
1145 
1146  vnet_buffer (p0)->l3_hdr_offset = p0->current_data;
1147  vnet_buffer (p1)->l3_hdr_offset = p1->current_data;
1148 
1149  type0 = lm->builtin_protocol_by_ip_protocol[ip0->protocol];
1150  type1 = lm->builtin_protocol_by_ip_protocol[ip1->protocol];
1151 
1152  flags0 = p0->flags;
1153  flags1 = p1->flags;
1154 
1155  is_tcp_udp0 = ip6_next_proto_is_tcp_udp (p0, ip0, &udp_offset0);
1156  is_tcp_udp1 = ip6_next_proto_is_tcp_udp (p1, ip1, &udp_offset1);
1157 
1158  good_l4_csum0 = (flags0 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT
1159  || (flags0 & VNET_BUFFER_F_OFFLOAD_TCP_CKSUM
1160  || flags0 & VNET_BUFFER_F_OFFLOAD_UDP_CKSUM))
1161  != 0;
1162  good_l4_csum1 = (flags1 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT
1163  || (flags1 & VNET_BUFFER_F_OFFLOAD_TCP_CKSUM
1164  || flags1 & VNET_BUFFER_F_OFFLOAD_UDP_CKSUM))
1165  != 0;
1166  len_diff0 = 0;
1167  len_diff1 = 0;
1168 
1169  if (PREDICT_TRUE (is_tcp_udp0))
1170  {
1171  udp0 = (udp_header_t *) ((u8 *) ip0 + udp_offset0);
1172  /* Don't verify UDP checksum for packets with explicit zero checksum. */
1173  good_l4_csum0 |= type0 == IP_BUILTIN_PROTOCOL_UDP
1174  && udp0->checksum == 0;
1175  /* Verify UDP length. */
1176  if (is_tcp_udp0 == IP_PROTOCOL_UDP)
1177  {
1178  ip_len0 = clib_net_to_host_u16 (ip0->payload_length);
1179  udp_len0 = clib_net_to_host_u16 (udp0->length);
1180  len_diff0 = ip_len0 - udp_len0;
1181  }
1182  }
1183  if (PREDICT_TRUE (is_tcp_udp1))
1184  {
1185  udp1 = (udp_header_t *) ((u8 *) ip1 + udp_offset1);
1186  /* Don't verify UDP checksum for packets with explicit zero checksum. */
1187  good_l4_csum1 |= type1 == IP_BUILTIN_PROTOCOL_UDP
1188  && udp1->checksum == 0;
1189  /* Verify UDP length. */
1190  if (is_tcp_udp1 == IP_PROTOCOL_UDP)
1191  {
1192  ip_len1 = clib_net_to_host_u16 (ip1->payload_length);
1193  udp_len1 = clib_net_to_host_u16 (udp1->length);
1194  len_diff1 = ip_len1 - udp_len1;
1195  }
1196  }
1197 
1198  good_l4_csum0 |= type0 == IP_BUILTIN_PROTOCOL_UNKNOWN;
1199  good_l4_csum1 |= type1 == IP_BUILTIN_PROTOCOL_UNKNOWN;
1200 
1201  len_diff0 = type0 == IP_BUILTIN_PROTOCOL_UDP ? len_diff0 : 0;
1202  len_diff1 = type1 == IP_BUILTIN_PROTOCOL_UDP ? len_diff1 : 0;
1203 
1205  && !good_l4_csum0
1206  && !(flags0 &
1207  VNET_BUFFER_F_L4_CHECKSUM_COMPUTED)))
1208  {
1209  flags0 = ip6_tcp_udp_icmp_validate_checksum (vm, p0);
1210  good_l4_csum0 =
1211  (flags0 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0;
1212  }
1214  && !good_l4_csum1
1215  && !(flags1 &
1216  VNET_BUFFER_F_L4_CHECKSUM_COMPUTED)))
1217  {
1218  flags1 = ip6_tcp_udp_icmp_validate_checksum (vm, p1);
1219  good_l4_csum1 =
1220  (flags1 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0;
1221  }
1222 
1223  error0 = error1 = IP6_ERROR_UNKNOWN_PROTOCOL;
1224  error0 = len_diff0 < 0 ? IP6_ERROR_UDP_LENGTH : error0;
1225  error1 = len_diff1 < 0 ? IP6_ERROR_UDP_LENGTH : error1;
1226 
1227  ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_UDP ==
1228  IP6_ERROR_UDP_CHECKSUM);
1229  ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_ICMP ==
1230  IP6_ERROR_ICMP_CHECKSUM);
1231  error0 = (!good_l4_csum0 ? IP6_ERROR_UDP_CHECKSUM + type0 : error0);
1232  error1 = (!good_l4_csum1 ? IP6_ERROR_UDP_CHECKSUM + type1 : error1);
1233 
1234  /* Drop packets from unroutable hosts. */
1235  /* If this is a neighbor solicitation (ICMP), skip source RPF check */
1236  if (error0 == IP6_ERROR_UNKNOWN_PROTOCOL &&
1237  type0 != IP_BUILTIN_PROTOCOL_ICMP &&
1239  {
1240  error0 = (!ip6_urpf_loose_check (im, p0, ip0)
1241  ? IP6_ERROR_SRC_LOOKUP_MISS : error0);
1242  }
1243  if (error1 == IP6_ERROR_UNKNOWN_PROTOCOL &&
1244  type1 != IP_BUILTIN_PROTOCOL_ICMP &&
1246  {
1247  error1 = (!ip6_urpf_loose_check (im, p1, ip1)
1248  ? IP6_ERROR_SRC_LOOKUP_MISS : error1);
1249  }
1250 
1251  vnet_buffer (p0)->ip.fib_index =
1252  vnet_buffer (p0)->sw_if_index[VLIB_TX] != ~0 ?
1253  vnet_buffer (p0)->sw_if_index[VLIB_TX] :
1254  vnet_buffer (p0)->ip.fib_index;
1255 
1256  vnet_buffer (p1)->ip.fib_index =
1257  vnet_buffer (p1)->sw_if_index[VLIB_TX] != ~0 ?
1258  vnet_buffer (p1)->sw_if_index[VLIB_TX] :
1259  vnet_buffer (p1)->ip.fib_index;
1260 
1261  skip_checks:
1262 
1263  next0 = lm->local_next_by_ip_protocol[ip0->protocol];
1264  next1 = lm->local_next_by_ip_protocol[ip1->protocol];
1265 
1266  next0 =
1267  error0 != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next0;
1268  next1 =
1269  error1 != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next1;
1270 
1271  p0->error = error_node->errors[error0];
1272  p1->error = error_node->errors[error1];
1273 
1274  if (head_of_feature_arc)
1275  {
1276  if (PREDICT_TRUE (error0 == (u8) IP6_ERROR_UNKNOWN_PROTOCOL))
1277  vnet_feature_arc_start (arc_index,
1278  vnet_buffer (p0)->sw_if_index
1279  [VLIB_RX], &next0, p0);
1280  if (PREDICT_TRUE (error1 == (u8) IP6_ERROR_UNKNOWN_PROTOCOL))
1281  vnet_feature_arc_start (arc_index,
1282  vnet_buffer (p1)->sw_if_index
1283  [VLIB_RX], &next1, p1);
1284  }
1285 
1286  vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
1287  to_next, n_left_to_next,
1288  pi0, pi1, next0, next1);
1289  }
1290 
1291  while (n_left_from > 0 && n_left_to_next > 0)
1292  {
1293  vlib_buffer_t *p0;
1294  ip6_header_t *ip0;
1295  udp_header_t *udp0;
1296  u32 pi0, ip_len0, udp_len0, flags0, next0;
1297  i32 len_diff0;
1298  u8 error0, type0, good_l4_csum0;
1299  u32 udp_offset0;
1300  u8 is_tcp_udp0;
1301 
1302  pi0 = to_next[0] = from[0];
1303  from += 1;
1304  n_left_from -= 1;
1305  to_next += 1;
1306  n_left_to_next -= 1;
1307 
1308  error0 = IP6_ERROR_UNKNOWN_PROTOCOL;
1309 
1310  p0 = vlib_get_buffer (vm, pi0);
1311  ip0 = vlib_buffer_get_current (p0);
1312 
1313  if (head_of_feature_arc == 0)
1314  goto skip_check;
1315 
1316  vnet_buffer (p0)->l3_hdr_offset = p0->current_data;
1317 
1318  type0 = lm->builtin_protocol_by_ip_protocol[ip0->protocol];
1319  flags0 = p0->flags;
1320  is_tcp_udp0 = ip6_next_proto_is_tcp_udp (p0, ip0, &udp_offset0);
1321  good_l4_csum0 = (flags0 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT
1322  || (flags0 & VNET_BUFFER_F_OFFLOAD_TCP_CKSUM
1323  || flags0 & VNET_BUFFER_F_OFFLOAD_UDP_CKSUM))
1324  != 0;
1325 
1326  len_diff0 = 0;
1327  if (PREDICT_TRUE (is_tcp_udp0))
1328  {
1329  udp0 = (udp_header_t *) ((u8 *) ip0 + udp_offset0);
1330  /* Don't verify UDP checksum for packets with explicit zero
1331  * checksum. */
1332  good_l4_csum0 |= type0 == IP_BUILTIN_PROTOCOL_UDP
1333  && udp0->checksum == 0;
1334  /* Verify UDP length. */
1335  if (is_tcp_udp0 == IP_PROTOCOL_UDP)
1336  {
1337  ip_len0 = clib_net_to_host_u16 (ip0->payload_length);
1338  udp_len0 = clib_net_to_host_u16 (udp0->length);
1339  len_diff0 = ip_len0 - udp_len0;
1340  }
1341  }
1342 
1343  good_l4_csum0 |= type0 == IP_BUILTIN_PROTOCOL_UNKNOWN;
1344  len_diff0 = type0 == IP_BUILTIN_PROTOCOL_UDP ? len_diff0 : 0;
1345 
1347  && !good_l4_csum0
1348  && !(flags0 &
1349  VNET_BUFFER_F_L4_CHECKSUM_COMPUTED)))
1350  {
1351  flags0 = ip6_tcp_udp_icmp_validate_checksum (vm, p0);
1352  good_l4_csum0 =
1353  (flags0 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0;
1354  }
1355 
1356  error0 = IP6_ERROR_UNKNOWN_PROTOCOL;
1357  error0 = len_diff0 < 0 ? IP6_ERROR_UDP_LENGTH : error0;
1358 
1359  ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_UDP ==
1360  IP6_ERROR_UDP_CHECKSUM);
1361  ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_ICMP ==
1362  IP6_ERROR_ICMP_CHECKSUM);
1363  error0 = (!good_l4_csum0 ? IP6_ERROR_UDP_CHECKSUM + type0 : error0);
1364 
1365  /* If this is a neighbor solicitation (ICMP), skip src RPF check */
1366  if (error0 == IP6_ERROR_UNKNOWN_PROTOCOL &&
1367  type0 != IP_BUILTIN_PROTOCOL_ICMP &&
1369  {
1370  error0 = (!ip6_urpf_loose_check (im, p0, ip0)
1371  ? IP6_ERROR_SRC_LOOKUP_MISS : error0);
1372  }
1373 
1374  vnet_buffer (p0)->ip.fib_index =
1375  vnet_buffer (p0)->sw_if_index[VLIB_TX] != ~0 ?
1376  vnet_buffer (p0)->sw_if_index[VLIB_TX] :
1377  vnet_buffer (p0)->ip.fib_index;
1378 
1379  skip_check:
1380 
1381  next0 = lm->local_next_by_ip_protocol[ip0->protocol];
1382  next0 =
1383  error0 != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next0;
1384 
1385  p0->error = error_node->errors[error0];
1386 
1387  if (head_of_feature_arc)
1388  {
1389  if (PREDICT_TRUE (error0 == (u8) IP6_ERROR_UNKNOWN_PROTOCOL))
1390  vnet_feature_arc_start (arc_index,
1391  vnet_buffer (p0)->sw_if_index
1392  [VLIB_RX], &next0, p0);
1393  }
1394 
1395  vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1396  to_next, n_left_to_next,
1397  pi0, next0);
1398  }
1399 
1400  vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1401  }
1402 
1403  return frame->n_vectors;
1404 }
1405 
1406 static uword
1408 {
1409  return ip6_local_inline (vm, node, frame, 1 /* head of feature arc */ );
1410 }
1411 
1412 /* *INDENT-OFF* */
1414 {
1415  .function = ip6_local,
1416  .name = "ip6-local",
1417  .vector_size = sizeof (u32),
1418  .format_trace = format_ip6_forward_next_trace,
1419  .n_next_nodes = IP_LOCAL_N_NEXT,
1420  .next_nodes =
1421  {
1422  [IP_LOCAL_NEXT_DROP] = "ip6-drop",
1423  [IP_LOCAL_NEXT_PUNT] = "ip6-punt",
1424  [IP_LOCAL_NEXT_UDP_LOOKUP] = "ip6-udp-lookup",
1425  [IP_LOCAL_NEXT_ICMP] = "ip6-icmp-input",
1426  [IP_LOCAL_NEXT_REASSEMBLY] = "ip6-reassembly",
1427  },
1428 };
1429 /* *INDENT-ON* */
1430 
1432 
1433 
1434 static uword
1436  vlib_node_runtime_t * node, vlib_frame_t * frame)
1437 {
1438  return ip6_local_inline (vm, node, frame, 0 /* head of feature arc */ );
1439 }
1440 
1441 /* *INDENT-OFF* */
1443  .function = ip6_local_end_of_arc,
1444  .name = "ip6-local-end-of-arc",
1445  .vector_size = sizeof (u32),
1446 
1447  .format_trace = format_ip6_forward_next_trace,
1448  .sibling_of = "ip6-local",
1449 };
1450 
1452 
1454  .arc_name = "ip6-local",
1455  .node_name = "ip6-local-end-of-arc",
1456  .runs_before = 0, /* not before any other features */
1457 };
1458 /* *INDENT-ON* */
1459 
1460 void
1461 ip6_register_protocol (u32 protocol, u32 node_index)
1462 {
1464  ip6_main_t *im = &ip6_main;
1465  ip_lookup_main_t *lm = &im->lookup_main;
1466 
1467  ASSERT (protocol < ARRAY_LEN (lm->local_next_by_ip_protocol));
1468  lm->local_next_by_ip_protocol[protocol] =
1469  vlib_node_add_next (vm, ip6_local_node.index, node_index);
1470 }
1471 
1472 clib_error_t *
1474  u8 refresh)
1475 {
1476  vnet_main_t *vnm = vnet_get_main ();
1477  ip6_main_t *im = &ip6_main;
1478  icmp6_neighbor_solicitation_header_t *h;
1479  ip6_address_t *src;
1481  ip_adjacency_t *adj;
1483  vnet_sw_interface_t *si;
1484  vlib_buffer_t *b;
1485  adj_index_t ai;
1486  u32 bi = 0;
1487  int bogus_length;
1488 
1489  si = vnet_get_sw_interface (vnm, sw_if_index);
1490 
1492  {
1493  return clib_error_return (0, "%U: interface %U down",
1494  format_ip6_address, dst,
1496  sw_if_index);
1497  }
1498 
1499  src =
1500  ip6_interface_address_matching_destination (im, dst, sw_if_index, &ia);
1501  if (!src)
1502  {
1503  vnm->api_errno = VNET_API_ERROR_NO_MATCHING_INTERFACE;
1504  return clib_error_return
1505  (0, "no matching interface address for destination %U (interface %U)",
1506  format_ip6_address, dst,
1507  format_vnet_sw_if_index_name, vnm, sw_if_index);
1508  }
1509 
1510  h =
1513  &bi);
1514  if (!h)
1515  return clib_error_return (0, "ICMP6 NS packet allocation failed");
1516 
1517  hi = vnet_get_sup_hw_interface (vnm, sw_if_index);
1518 
1519  /* Destination address is a solicited node multicast address. We need to fill in
1520  the low 24 bits with low 24 bits of target's address. */
1521  h->ip.dst_address.as_u8[13] = dst->as_u8[13];
1522  h->ip.dst_address.as_u8[14] = dst->as_u8[14];
1523  h->ip.dst_address.as_u8[15] = dst->as_u8[15];
1524 
1525  h->ip.src_address = src[0];
1526  h->neighbor.target_address = dst[0];
1527 
1528  if (PREDICT_FALSE (!hi->hw_address))
1529  {
1530  return clib_error_return (0, "%U: interface %U do not support ip probe",
1531  format_ip6_address, dst,
1533  sw_if_index);
1534  }
1535 
1536  clib_memcpy_fast (h->link_layer_option.ethernet_address, hi->hw_address,
1537  vec_len (hi->hw_address));
1538 
1539  h->neighbor.icmp.checksum =
1540  ip6_tcp_udp_icmp_compute_checksum (vm, 0, &h->ip, &bogus_length);
1541  ASSERT (bogus_length == 0);
1542 
1543  b = vlib_get_buffer (vm, bi);
1544  vnet_buffer (b)->sw_if_index[VLIB_RX] =
1545  vnet_buffer (b)->sw_if_index[VLIB_TX] = sw_if_index;
1546 
1547  /* Add encapsulation string for software interface (e.g. ethernet header). */
1548  ip46_address_t nh = {
1549  .ip6 = *dst,
1550  };
1551 
1553  VNET_LINK_IP6, &nh, sw_if_index);
1554  adj = adj_get (ai);
1555 
1556  /* Peer has been previously resolved, retrieve glean adj instead */
1557  if (adj->lookup_next_index == IP_LOOKUP_NEXT_REWRITE && refresh == 0)
1558  {
1559  adj_unlock (ai);
1561  VNET_LINK_IP6, sw_if_index, &nh);
1562  adj = adj_get (ai);
1563  }
1564 
1565  vnet_rewrite_one_header (adj[0], h, sizeof (ethernet_header_t));
1566  vlib_buffer_advance (b, -adj->rewrite_header.data_bytes);
1567 
1568  {
1570  u32 *to_next = vlib_frame_vector_args (f);
1571  to_next[0] = bi;
1572  f->n_vectors = 1;
1574  }
1575 
1576  adj_unlock (ai);
1577  return /* no error */ 0;
1578 }
1579 
1580 typedef enum
1581 {
1587 
1588 /**
1589  * This bits of an IPv6 address to mask to construct a multicast
1590  * MAC address
1591  */
1592 #define IP6_MCAST_ADDR_MASK 0xffffffff
1593 
1594 always_inline void
1595 ip6_mtu_check (vlib_buffer_t * b, u16 packet_bytes,
1596  u16 adj_packet_bytes, bool is_locally_generated,
1597  u32 * next, u32 * error)
1598 {
1599  if (adj_packet_bytes >= 1280 && packet_bytes > adj_packet_bytes)
1600  {
1601  if (is_locally_generated)
1602  {
1603  /* IP fragmentation */
1604  ip_frag_set_vnet_buffer (b, adj_packet_bytes,
1606  *next = IP6_REWRITE_NEXT_FRAGMENT;
1607  *error = IP6_ERROR_MTU_EXCEEDED;
1608  }
1609  else
1610  {
1611  *error = IP6_ERROR_MTU_EXCEEDED;
1612  icmp6_error_set_vnet_buffer (b, ICMP6_packet_too_big, 0,
1613  adj_packet_bytes);
1615  }
1616  }
1617 }
1618 
1621  vlib_node_runtime_t * node,
1622  vlib_frame_t * frame,
1623  int do_counters, int is_midchain, int is_mcast)
1624 {
1626  u32 *from = vlib_frame_vector_args (frame);
1627  u32 n_left_from, n_left_to_next, *to_next, next_index;
1628  vlib_node_runtime_t *error_node =
1630 
1631  n_left_from = frame->n_vectors;
1632  next_index = node->cached_next_index;
1633  u32 thread_index = vm->thread_index;
1634 
1635  while (n_left_from > 0)
1636  {
1637  vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1638 
1639  while (n_left_from >= 4 && n_left_to_next >= 2)
1640  {
1641  ip_adjacency_t *adj0, *adj1;
1642  vlib_buffer_t *p0, *p1;
1643  ip6_header_t *ip0, *ip1;
1644  u32 pi0, rw_len0, next0, error0, adj_index0;
1645  u32 pi1, rw_len1, next1, error1, adj_index1;
1646  u32 tx_sw_if_index0, tx_sw_if_index1;
1647  bool is_locally_originated0, is_locally_originated1;
1648 
1649  /* Prefetch next iteration. */
1650  {
1651  vlib_buffer_t *p2, *p3;
1652 
1653  p2 = vlib_get_buffer (vm, from[2]);
1654  p3 = vlib_get_buffer (vm, from[3]);
1655 
1656  vlib_prefetch_buffer_header (p2, LOAD);
1657  vlib_prefetch_buffer_header (p3, LOAD);
1658 
1659  CLIB_PREFETCH (p2->pre_data, 32, STORE);
1660  CLIB_PREFETCH (p3->pre_data, 32, STORE);
1661 
1662  CLIB_PREFETCH (p2->data, sizeof (ip0[0]), STORE);
1663  CLIB_PREFETCH (p3->data, sizeof (ip0[0]), STORE);
1664  }
1665 
1666  pi0 = to_next[0] = from[0];
1667  pi1 = to_next[1] = from[1];
1668 
1669  from += 2;
1670  n_left_from -= 2;
1671  to_next += 2;
1672  n_left_to_next -= 2;
1673 
1674  p0 = vlib_get_buffer (vm, pi0);
1675  p1 = vlib_get_buffer (vm, pi1);
1676 
1677  adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
1678  adj_index1 = vnet_buffer (p1)->ip.adj_index[VLIB_TX];
1679 
1680  ip0 = vlib_buffer_get_current (p0);
1681  ip1 = vlib_buffer_get_current (p1);
1682 
1683  error0 = error1 = IP6_ERROR_NONE;
1684  next0 = next1 = IP6_REWRITE_NEXT_DROP;
1685 
1686  is_locally_originated0 =
1687  p0->flags & VNET_BUFFER_F_LOCALLY_ORIGINATED;
1688  if (PREDICT_TRUE (!is_locally_originated0))
1689  {
1690  i32 hop_limit0 = ip0->hop_limit;
1691 
1692  /* Input node should have reject packets with hop limit 0. */
1693  ASSERT (ip0->hop_limit > 0);
1694 
1695  hop_limit0 -= 1;
1696 
1697  ip0->hop_limit = hop_limit0;
1698 
1699  /*
1700  * If the hop count drops below 1 when forwarding, generate
1701  * an ICMP response.
1702  */
1703  if (PREDICT_FALSE (hop_limit0 <= 0))
1704  {
1705  error0 = IP6_ERROR_TIME_EXPIRED;
1707  vnet_buffer (p0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
1708  icmp6_error_set_vnet_buffer (p0, ICMP6_time_exceeded,
1709  ICMP6_time_exceeded_ttl_exceeded_in_transit,
1710  0);
1711  }
1712  }
1713  else
1714  {
1715  p0->flags &= ~VNET_BUFFER_F_LOCALLY_ORIGINATED;
1716  }
1717  is_locally_originated1 =
1718  p1->flags & VNET_BUFFER_F_LOCALLY_ORIGINATED;
1719  if (PREDICT_TRUE (!is_locally_originated1))
1720  {
1721  i32 hop_limit1 = ip1->hop_limit;
1722 
1723  /* Input node should have reject packets with hop limit 0. */
1724  ASSERT (ip1->hop_limit > 0);
1725 
1726  hop_limit1 -= 1;
1727 
1728  ip1->hop_limit = hop_limit1;
1729 
1730  /*
1731  * If the hop count drops below 1 when forwarding, generate
1732  * an ICMP response.
1733  */
1734  if (PREDICT_FALSE (hop_limit1 <= 0))
1735  {
1736  error1 = IP6_ERROR_TIME_EXPIRED;
1738  vnet_buffer (p1)->sw_if_index[VLIB_TX] = (u32) ~ 0;
1739  icmp6_error_set_vnet_buffer (p1, ICMP6_time_exceeded,
1740  ICMP6_time_exceeded_ttl_exceeded_in_transit,
1741  0);
1742  }
1743  }
1744  else
1745  {
1746  p1->flags &= ~VNET_BUFFER_F_LOCALLY_ORIGINATED;
1747  }
1748  adj0 = adj_get (adj_index0);
1749  adj1 = adj_get (adj_index1);
1750 
1751  rw_len0 = adj0[0].rewrite_header.data_bytes;
1752  rw_len1 = adj1[0].rewrite_header.data_bytes;
1753  vnet_buffer (p0)->ip.save_rewrite_length = rw_len0;
1754  vnet_buffer (p1)->ip.save_rewrite_length = rw_len1;
1755 
1756  if (do_counters)
1757  {
1760  thread_index, adj_index0, 1,
1761  vlib_buffer_length_in_chain (vm, p0) + rw_len0);
1764  thread_index, adj_index1, 1,
1765  vlib_buffer_length_in_chain (vm, p1) + rw_len1);
1766  }
1767 
1768  /* Check MTU of outgoing interface. */
1769  ip6_mtu_check (p0, clib_net_to_host_u16 (ip0->payload_length) +
1770  sizeof (ip6_header_t),
1771  adj0[0].rewrite_header.max_l3_packet_bytes,
1772  is_locally_originated0, &next0, &error0);
1773  ip6_mtu_check (p1, clib_net_to_host_u16 (ip1->payload_length) +
1774  sizeof (ip6_header_t),
1775  adj1[0].rewrite_header.max_l3_packet_bytes,
1776  is_locally_originated1, &next1, &error1);
1777 
1778  /* Don't adjust the buffer for hop count issue; icmp-error node
1779  * wants to see the IP headerr */
1780  if (PREDICT_TRUE (error0 == IP6_ERROR_NONE))
1781  {
1782  p0->current_data -= rw_len0;
1783  p0->current_length += rw_len0;
1784 
1785  tx_sw_if_index0 = adj0[0].rewrite_header.sw_if_index;
1786  vnet_buffer (p0)->sw_if_index[VLIB_TX] = tx_sw_if_index0;
1787  next0 = adj0[0].rewrite_header.next_index;
1788 
1789  if (PREDICT_FALSE
1790  (adj0[0].rewrite_header.flags & VNET_REWRITE_HAS_FEATURES))
1792  tx_sw_if_index0, &next0, p0);
1793  }
1794  if (PREDICT_TRUE (error1 == IP6_ERROR_NONE))
1795  {
1796  p1->current_data -= rw_len1;
1797  p1->current_length += rw_len1;
1798 
1799  tx_sw_if_index1 = adj1[0].rewrite_header.sw_if_index;
1800  vnet_buffer (p1)->sw_if_index[VLIB_TX] = tx_sw_if_index1;
1801  next1 = adj1[0].rewrite_header.next_index;
1802 
1803  if (PREDICT_FALSE
1804  (adj1[0].rewrite_header.flags & VNET_REWRITE_HAS_FEATURES))
1806  tx_sw_if_index1, &next1, p1);
1807  }
1808 
1809  /* Guess we are only writing on simple Ethernet header. */
1810  vnet_rewrite_two_headers (adj0[0], adj1[0],
1811  ip0, ip1, sizeof (ethernet_header_t));
1812 
1813  if (is_midchain)
1814  {
1815  adj0->sub_type.midchain.fixup_func
1816  (vm, adj0, p0, adj0->sub_type.midchain.fixup_data);
1817  adj1->sub_type.midchain.fixup_func
1818  (vm, adj1, p1, adj1->sub_type.midchain.fixup_data);
1819  }
1820  if (is_mcast)
1821  {
1822  /*
1823  * copy bytes from the IP address into the MAC rewrite
1824  */
1826  adj0->
1827  rewrite_header.dst_mcast_offset,
1828  &ip0->dst_address.as_u32[3],
1829  (u8 *) ip0);
1831  adj1->
1832  rewrite_header.dst_mcast_offset,
1833  &ip1->dst_address.as_u32[3],
1834  (u8 *) ip1);
1835  }
1836 
1837  vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
1838  to_next, n_left_to_next,
1839  pi0, pi1, next0, next1);
1840  }
1841 
1842  while (n_left_from > 0 && n_left_to_next > 0)
1843  {
1844  ip_adjacency_t *adj0;
1845  vlib_buffer_t *p0;
1846  ip6_header_t *ip0;
1847  u32 pi0, rw_len0;
1848  u32 adj_index0, next0, error0;
1849  u32 tx_sw_if_index0;
1850  bool is_locally_originated0;
1851 
1852  pi0 = to_next[0] = from[0];
1853 
1854  p0 = vlib_get_buffer (vm, pi0);
1855 
1856  adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
1857 
1858  adj0 = adj_get (adj_index0);
1859 
1860  ip0 = vlib_buffer_get_current (p0);
1861 
1862  error0 = IP6_ERROR_NONE;
1863  next0 = IP6_REWRITE_NEXT_DROP;
1864 
1865  /* Check hop limit */
1866  is_locally_originated0 =
1867  p0->flags & VNET_BUFFER_F_LOCALLY_ORIGINATED;
1868  if (PREDICT_TRUE (!is_locally_originated0))
1869  {
1870  i32 hop_limit0 = ip0->hop_limit;
1871 
1872  ASSERT (ip0->hop_limit > 0);
1873 
1874  hop_limit0 -= 1;
1875 
1876  ip0->hop_limit = hop_limit0;
1877 
1878  if (PREDICT_FALSE (hop_limit0 <= 0))
1879  {
1880  /*
1881  * If the hop count drops below 1 when forwarding, generate
1882  * an ICMP response.
1883  */
1884  error0 = IP6_ERROR_TIME_EXPIRED;
1886  vnet_buffer (p0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
1887  icmp6_error_set_vnet_buffer (p0, ICMP6_time_exceeded,
1888  ICMP6_time_exceeded_ttl_exceeded_in_transit,
1889  0);
1890  }
1891  }
1892  else
1893  {
1894  p0->flags &= ~VNET_BUFFER_F_LOCALLY_ORIGINATED;
1895  }
1896 
1897  /* Guess we are only writing on simple Ethernet header. */
1898  vnet_rewrite_one_header (adj0[0], ip0, sizeof (ethernet_header_t));
1899 
1900  /* Update packet buffer attributes/set output interface. */
1901  rw_len0 = adj0[0].rewrite_header.data_bytes;
1902  vnet_buffer (p0)->ip.save_rewrite_length = rw_len0;
1903 
1904  if (do_counters)
1905  {
1908  thread_index, adj_index0, 1,
1909  vlib_buffer_length_in_chain (vm, p0) + rw_len0);
1910  }
1911 
1912  /* Check MTU of outgoing interface. */
1913  ip6_mtu_check (p0, clib_net_to_host_u16 (ip0->payload_length) +
1914  sizeof (ip6_header_t),
1915  adj0[0].rewrite_header.max_l3_packet_bytes,
1916  is_locally_originated0, &next0, &error0);
1917 
1918  /* Don't adjust the buffer for hop count issue; icmp-error node
1919  * wants to see the IP header */
1920  if (PREDICT_TRUE (error0 == IP6_ERROR_NONE))
1921  {
1922  p0->current_data -= rw_len0;
1923  p0->current_length += rw_len0;
1924 
1925  tx_sw_if_index0 = adj0[0].rewrite_header.sw_if_index;
1926 
1927  vnet_buffer (p0)->sw_if_index[VLIB_TX] = tx_sw_if_index0;
1928  next0 = adj0[0].rewrite_header.next_index;
1929 
1930  if (PREDICT_FALSE
1931  (adj0[0].rewrite_header.flags & VNET_REWRITE_HAS_FEATURES))
1933  tx_sw_if_index0, &next0, p0);
1934  }
1935 
1936  if (is_midchain)
1937  {
1938  adj0->sub_type.midchain.fixup_func
1939  (vm, adj0, p0, adj0->sub_type.midchain.fixup_data);
1940  }
1941  if (is_mcast)
1942  {
1944  adj0->
1945  rewrite_header.dst_mcast_offset,
1946  &ip0->dst_address.as_u32[3],
1947  (u8 *) ip0);
1948  }
1949 
1950  p0->error = error_node->errors[error0];
1951 
1952  from += 1;
1953  n_left_from -= 1;
1954  to_next += 1;
1955  n_left_to_next -= 1;
1956 
1957  vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1958  to_next, n_left_to_next,
1959  pi0, next0);
1960  }
1961 
1962  vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1963  }
1964 
1965  /* Need to do trace after rewrites to pick up new packet data. */
1966  if (node->flags & VLIB_NODE_FLAG_TRACE)
1967  ip6_forward_next_trace (vm, node, frame, VLIB_TX);
1968 
1969  return frame->n_vectors;
1970 }
1971 
1972 static uword
1974  vlib_node_runtime_t * node, vlib_frame_t * frame)
1975 {
1976  if (adj_are_counters_enabled ())
1977  return ip6_rewrite_inline (vm, node, frame, 1, 0, 0);
1978  else
1979  return ip6_rewrite_inline (vm, node, frame, 0, 0, 0);
1980 }
1981 
1982 static uword
1984  vlib_node_runtime_t * node, vlib_frame_t * frame)
1985 {
1986  if (adj_are_counters_enabled ())
1987  return ip6_rewrite_inline (vm, node, frame, 1, 0, 0);
1988  else
1989  return ip6_rewrite_inline (vm, node, frame, 0, 0, 0);
1990 }
1991 
1992 static uword
1994  vlib_node_runtime_t * node, vlib_frame_t * frame)
1995 {
1996  if (adj_are_counters_enabled ())
1997  return ip6_rewrite_inline (vm, node, frame, 1, 0, 1);
1998  else
1999  return ip6_rewrite_inline (vm, node, frame, 0, 0, 1);
2000 }
2001 
2002 static uword
2004  vlib_node_runtime_t * node, vlib_frame_t * frame)
2005 {
2006  if (adj_are_counters_enabled ())
2007  return ip6_rewrite_inline (vm, node, frame, 1, 1, 0);
2008  else
2009  return ip6_rewrite_inline (vm, node, frame, 0, 1, 0);
2010 }
2011 
2012 static uword
2014  vlib_node_runtime_t * node, vlib_frame_t * frame)
2015 {
2016  if (adj_are_counters_enabled ())
2017  return ip6_rewrite_inline (vm, node, frame, 1, 1, 1);
2018  else
2019  return ip6_rewrite_inline (vm, node, frame, 0, 1, 1);
2020 }
2021 
2022 /* *INDENT-OFF* */
2024 {
2025  .function = ip6_midchain,
2026  .name = "ip6-midchain",
2027  .vector_size = sizeof (u32),
2028  .format_trace = format_ip6_forward_next_trace,
2029  .sibling_of = "ip6-rewrite",
2030  };
2031 
2033 
2035 {
2036  .function = ip6_rewrite,
2037  .name = "ip6-rewrite",
2038  .vector_size = sizeof (u32),
2039  .format_trace = format_ip6_rewrite_trace,
2040  .n_next_nodes = IP6_REWRITE_N_NEXT,
2041  .next_nodes =
2042  {
2043  [IP6_REWRITE_NEXT_DROP] = "ip6-drop",
2044  [IP6_REWRITE_NEXT_ICMP_ERROR] = "ip6-icmp-error",
2045  [IP6_REWRITE_NEXT_FRAGMENT] = "ip6-frag",
2046  },
2047 };
2048 
2050 
2052  .function = ip6_rewrite_bcast,
2053  .name = "ip6-rewrite-bcast",
2054  .vector_size = sizeof (u32),
2055 
2056  .format_trace = format_ip6_rewrite_trace,
2057  .sibling_of = "ip6-rewrite",
2058 };
2060 
2062 {
2063  .function = ip6_rewrite_mcast,
2064  .name = "ip6-rewrite-mcast",
2065  .vector_size = sizeof (u32),
2066  .format_trace = format_ip6_rewrite_trace,
2067  .sibling_of = "ip6-rewrite",
2068 };
2069 
2071 
2073 {
2074  .function = ip6_mcast_midchain,
2075  .name = "ip6-mcast-midchain",
2076  .vector_size = sizeof (u32),
2077  .format_trace = format_ip6_rewrite_trace,
2078  .sibling_of = "ip6-rewrite",
2079 };
2080 
2082 /* *INDENT-ON* */
2083 
2084 /*
2085  * Hop-by-Hop handling
2086  */
2088 
2089 #define foreach_ip6_hop_by_hop_error \
2090 _(PROCESSED, "pkts with ip6 hop-by-hop options") \
2091 _(FORMAT, "incorrectly formatted hop-by-hop options") \
2092 _(UNKNOWN_OPTION, "unknown ip6 hop-by-hop options")
2093 
2094 /* *INDENT-OFF* */
2095 typedef enum
2096 {
2097 #define _(sym,str) IP6_HOP_BY_HOP_ERROR_##sym,
2099 #undef _
2102 /* *INDENT-ON* */
2103 
2104 /*
2105  * Primary h-b-h handler trace support
2106  * We work pretty hard on the problem for obvious reasons
2107  */
2108 typedef struct
2109 {
2112  u8 option_data[256];
2114 
2116 
2118 #define _(sym,string) string,
2120 #undef _
2121 };
2122 
2123 u8 *
2124 format_ip6_hop_by_hop_ext_hdr (u8 * s, va_list * args)
2125 {
2126  ip6_hop_by_hop_header_t *hbh0 = va_arg (*args, ip6_hop_by_hop_header_t *);
2127  int total_len = va_arg (*args, int);
2128  ip6_hop_by_hop_option_t *opt0, *limit0;
2130  u8 type0;
2131 
2132  s = format (s, "IP6_HOP_BY_HOP: next protocol %d len %d total %d",
2133  hbh0->protocol, (hbh0->length + 1) << 3, total_len);
2134 
2135  opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2136  limit0 = (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 + total_len);
2137 
2138  while (opt0 < limit0)
2139  {
2140  type0 = opt0->type;
2141  switch (type0)
2142  {
2143  case 0: /* Pad, just stop */
2144  opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0 + 1);
2145  break;
2146 
2147  default:
2148  if (hm->trace[type0])
2149  {
2150  s = (*hm->trace[type0]) (s, opt0);
2151  }
2152  else
2153  {
2154  s =
2155  format (s, "\n unrecognized option %d length %d", type0,
2156  opt0->length);
2157  }
2158  opt0 =
2159  (ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length +
2160  sizeof (ip6_hop_by_hop_option_t));
2161  break;
2162  }
2163  }
2164  return s;
2165 }
2166 
2167 static u8 *
2168 format_ip6_hop_by_hop_trace (u8 * s, va_list * args)
2169 {
2170  CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
2171  CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
2172  ip6_hop_by_hop_trace_t *t = va_arg (*args, ip6_hop_by_hop_trace_t *);
2174  ip6_hop_by_hop_option_t *opt0, *limit0;
2176 
2177  u8 type0;
2178 
2179  hbh0 = (ip6_hop_by_hop_header_t *) t->option_data;
2180 
2181  s = format (s, "IP6_HOP_BY_HOP: next index %d len %d traced %d",
2182  t->next_index, (hbh0->length + 1) << 3, t->trace_len);
2183 
2184  opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2185  limit0 = (ip6_hop_by_hop_option_t *) ((u8 *) hbh0) + t->trace_len;
2186 
2187  while (opt0 < limit0)
2188  {
2189  type0 = opt0->type;
2190  switch (type0)
2191  {
2192  case 0: /* Pad, just stop */
2193  opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0) + 1;
2194  break;
2195 
2196  default:
2197  if (hm->trace[type0])
2198  {
2199  s = (*hm->trace[type0]) (s, opt0);
2200  }
2201  else
2202  {
2203  s =
2204  format (s, "\n unrecognized option %d length %d", type0,
2205  opt0->length);
2206  }
2207  opt0 =
2208  (ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length +
2209  sizeof (ip6_hop_by_hop_option_t));
2210  break;
2211  }
2212  }
2213  return s;
2214 }
2215 
2218  ip6_header_t * ip0,
2219  ip6_hop_by_hop_header_t * hbh0,
2220  ip6_hop_by_hop_option_t * opt0,
2221  ip6_hop_by_hop_option_t * limit0, u32 * next0)
2222 {
2224  u8 type0;
2225  u8 error0 = 0;
2226 
2227  while (opt0 < limit0)
2228  {
2229  type0 = opt0->type;
2230  switch (type0)
2231  {
2232  case 0: /* Pad1 */
2233  opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0) + 1;
2234  continue;
2235  case 1: /* PadN */
2236  break;
2237  default:
2238  if (hm->options[type0])
2239  {
2240  if ((*hm->options[type0]) (b0, ip0, opt0) < 0)
2241  {
2242  error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2243  return (error0);
2244  }
2245  }
2246  else
2247  {
2248  /* Unrecognized mandatory option, check the two high order bits */
2249  switch (opt0->type & HBH_OPTION_TYPE_HIGH_ORDER_BITS)
2250  {
2252  break;
2254  error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2255  *next0 = IP_LOOKUP_NEXT_DROP;
2256  break;
2258  error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2259  *next0 = IP_LOOKUP_NEXT_ICMP_ERROR;
2260  icmp6_error_set_vnet_buffer (b0, ICMP6_parameter_problem,
2261  ICMP6_parameter_problem_unrecognized_option,
2262  (u8 *) opt0 - (u8 *) ip0);
2263  break;
2265  error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2266  if (!ip6_address_is_multicast (&ip0->dst_address))
2267  {
2268  *next0 = IP_LOOKUP_NEXT_ICMP_ERROR;
2270  ICMP6_parameter_problem,
2271  ICMP6_parameter_problem_unrecognized_option,
2272  (u8 *) opt0 - (u8 *) ip0);
2273  }
2274  else
2275  {
2276  *next0 = IP_LOOKUP_NEXT_DROP;
2277  }
2278  break;
2279  }
2280  return (error0);
2281  }
2282  }
2283  opt0 =
2284  (ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length +
2285  sizeof (ip6_hop_by_hop_option_t));
2286  }
2287  return (error0);
2288 }
2289 
2290 /*
2291  * Process the Hop-by-Hop Options header
2292  */
2293 static uword
2295  vlib_node_runtime_t * node, vlib_frame_t * frame)
2296 {
2297  vlib_node_runtime_t *error_node =
2300  u32 n_left_from, *from, *to_next;
2301  ip_lookup_next_t next_index;
2302 
2303  from = vlib_frame_vector_args (frame);
2304  n_left_from = frame->n_vectors;
2305  next_index = node->cached_next_index;
2306 
2307  while (n_left_from > 0)
2308  {
2309  u32 n_left_to_next;
2310 
2311  vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
2312 
2313  while (n_left_from >= 4 && n_left_to_next >= 2)
2314  {
2315  u32 bi0, bi1;
2316  vlib_buffer_t *b0, *b1;
2317  u32 next0, next1;
2318  ip6_header_t *ip0, *ip1;
2319  ip6_hop_by_hop_header_t *hbh0, *hbh1;
2320  ip6_hop_by_hop_option_t *opt0, *limit0, *opt1, *limit1;
2321  u8 error0 = 0, error1 = 0;
2322 
2323  /* Prefetch next iteration. */
2324  {
2325  vlib_buffer_t *p2, *p3;
2326 
2327  p2 = vlib_get_buffer (vm, from[2]);
2328  p3 = vlib_get_buffer (vm, from[3]);
2329 
2330  vlib_prefetch_buffer_header (p2, LOAD);
2331  vlib_prefetch_buffer_header (p3, LOAD);
2332 
2333  CLIB_PREFETCH (p2->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
2334  CLIB_PREFETCH (p3->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
2335  }
2336 
2337  /* Speculatively enqueue b0, b1 to the current next frame */
2338  to_next[0] = bi0 = from[0];
2339  to_next[1] = bi1 = from[1];
2340  from += 2;
2341  to_next += 2;
2342  n_left_from -= 2;
2343  n_left_to_next -= 2;
2344 
2345  b0 = vlib_get_buffer (vm, bi0);
2346  b1 = vlib_get_buffer (vm, bi1);
2347 
2348  /* Default use the next_index from the adjacency. A HBH option rarely redirects to a different node */
2349  u32 adj_index0 = vnet_buffer (b0)->ip.adj_index[VLIB_TX];
2350  ip_adjacency_t *adj0 = adj_get (adj_index0);
2351  u32 adj_index1 = vnet_buffer (b1)->ip.adj_index[VLIB_TX];
2352  ip_adjacency_t *adj1 = adj_get (adj_index1);
2353 
2354  /* Default use the next_index from the adjacency. A HBH option rarely redirects to a different node */
2355  next0 = adj0->lookup_next_index;
2356  next1 = adj1->lookup_next_index;
2357 
2358  ip0 = vlib_buffer_get_current (b0);
2359  ip1 = vlib_buffer_get_current (b1);
2360  hbh0 = (ip6_hop_by_hop_header_t *) (ip0 + 1);
2361  hbh1 = (ip6_hop_by_hop_header_t *) (ip1 + 1);
2362  opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2363  opt1 = (ip6_hop_by_hop_option_t *) (hbh1 + 1);
2364  limit0 =
2365  (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 +
2366  ((hbh0->length + 1) << 3));
2367  limit1 =
2368  (ip6_hop_by_hop_option_t *) ((u8 *) hbh1 +
2369  ((hbh1->length + 1) << 3));
2370 
2371  /*
2372  * Basic validity checks
2373  */
2374  if ((hbh0->length + 1) << 3 >
2375  clib_net_to_host_u16 (ip0->payload_length))
2376  {
2377  error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2378  next0 = IP_LOOKUP_NEXT_DROP;
2379  goto outdual;
2380  }
2381  /* Scan the set of h-b-h options, process ones that we understand */
2382  error0 = ip6_scan_hbh_options (b0, ip0, hbh0, opt0, limit0, &next0);
2383 
2384  if ((hbh1->length + 1) << 3 >
2385  clib_net_to_host_u16 (ip1->payload_length))
2386  {
2387  error1 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2388  next1 = IP_LOOKUP_NEXT_DROP;
2389  goto outdual;
2390  }
2391  /* Scan the set of h-b-h options, process ones that we understand */
2392  error1 = ip6_scan_hbh_options (b1, ip1, hbh1, opt1, limit1, &next1);
2393 
2394  outdual:
2395  /* Has the classifier flagged this buffer for special treatment? */
2396  if (PREDICT_FALSE
2397  ((error0 == 0)
2398  && (vnet_buffer (b0)->l2_classify.opaque_index & OI_DECAP)))
2399  next0 = hm->next_override;
2400 
2401  /* Has the classifier flagged this buffer for special treatment? */
2402  if (PREDICT_FALSE
2403  ((error1 == 0)
2404  && (vnet_buffer (b1)->l2_classify.opaque_index & OI_DECAP)))
2405  next1 = hm->next_override;
2406 
2407  if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)))
2408  {
2409  if (b0->flags & VLIB_BUFFER_IS_TRACED)
2410  {
2412  vlib_add_trace (vm, node, b0, sizeof (*t));
2413  u32 trace_len = (hbh0->length + 1) << 3;
2414  t->next_index = next0;
2415  /* Capture the h-b-h option verbatim */
2416  trace_len =
2417  trace_len <
2418  ARRAY_LEN (t->option_data) ? trace_len :
2419  ARRAY_LEN (t->option_data);
2420  t->trace_len = trace_len;
2421  clib_memcpy_fast (t->option_data, hbh0, trace_len);
2422  }
2423  if (b1->flags & VLIB_BUFFER_IS_TRACED)
2424  {
2426  vlib_add_trace (vm, node, b1, sizeof (*t));
2427  u32 trace_len = (hbh1->length + 1) << 3;
2428  t->next_index = next1;
2429  /* Capture the h-b-h option verbatim */
2430  trace_len =
2431  trace_len <
2432  ARRAY_LEN (t->option_data) ? trace_len :
2433  ARRAY_LEN (t->option_data);
2434  t->trace_len = trace_len;
2435  clib_memcpy_fast (t->option_data, hbh1, trace_len);
2436  }
2437 
2438  }
2439 
2440  b0->error = error_node->errors[error0];
2441  b1->error = error_node->errors[error1];
2442 
2443  /* verify speculative enqueue, maybe switch current next frame */
2444  vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
2445  n_left_to_next, bi0, bi1, next0,
2446  next1);
2447  }
2448 
2449  while (n_left_from > 0 && n_left_to_next > 0)
2450  {
2451  u32 bi0;
2452  vlib_buffer_t *b0;
2453  u32 next0;
2454  ip6_header_t *ip0;
2456  ip6_hop_by_hop_option_t *opt0, *limit0;
2457  u8 error0 = 0;
2458 
2459  /* Speculatively enqueue b0 to the current next frame */
2460  bi0 = from[0];
2461  to_next[0] = bi0;
2462  from += 1;
2463  to_next += 1;
2464  n_left_from -= 1;
2465  n_left_to_next -= 1;
2466 
2467  b0 = vlib_get_buffer (vm, bi0);
2468  /*
2469  * Default use the next_index from the adjacency.
2470  * A HBH option rarely redirects to a different node
2471  */
2472  u32 adj_index0 = vnet_buffer (b0)->ip.adj_index[VLIB_TX];
2473  ip_adjacency_t *adj0 = adj_get (adj_index0);
2474  next0 = adj0->lookup_next_index;
2475 
2476  ip0 = vlib_buffer_get_current (b0);
2477  hbh0 = (ip6_hop_by_hop_header_t *) (ip0 + 1);
2478  opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2479  limit0 =
2480  (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 +
2481  ((hbh0->length + 1) << 3));
2482 
2483  /*
2484  * Basic validity checks
2485  */
2486  if ((hbh0->length + 1) << 3 >
2487  clib_net_to_host_u16 (ip0->payload_length))
2488  {
2489  error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2490  next0 = IP_LOOKUP_NEXT_DROP;
2491  goto out0;
2492  }
2493 
2494  /* Scan the set of h-b-h options, process ones that we understand */
2495  error0 = ip6_scan_hbh_options (b0, ip0, hbh0, opt0, limit0, &next0);
2496 
2497  out0:
2498  /* Has the classifier flagged this buffer for special treatment? */
2499  if (PREDICT_FALSE
2500  ((error0 == 0)
2501  && (vnet_buffer (b0)->l2_classify.opaque_index & OI_DECAP)))
2502  next0 = hm->next_override;
2503 
2504  if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
2505  {
2507  vlib_add_trace (vm, node, b0, sizeof (*t));
2508  u32 trace_len = (hbh0->length + 1) << 3;
2509  t->next_index = next0;
2510  /* Capture the h-b-h option verbatim */
2511  trace_len =
2512  trace_len <
2513  ARRAY_LEN (t->option_data) ? trace_len :
2514  ARRAY_LEN (t->option_data);
2515  t->trace_len = trace_len;
2516  clib_memcpy_fast (t->option_data, hbh0, trace_len);
2517  }
2518 
2519  b0->error = error_node->errors[error0];
2520 
2521  /* verify speculative enqueue, maybe switch current next frame */
2522  vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
2523  n_left_to_next, bi0, next0);
2524  }
2525  vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2526  }
2527  return frame->n_vectors;
2528 }
2529 
2530 /* *INDENT-OFF* */
2532 {
2533  .function = ip6_hop_by_hop,
2534  .name = "ip6-hop-by-hop",
2535  .sibling_of = "ip6-lookup",
2536  .vector_size = sizeof (u32),
2537  .format_trace = format_ip6_hop_by_hop_trace,
2538  .type = VLIB_NODE_TYPE_INTERNAL,
2540  .error_strings = ip6_hop_by_hop_error_strings,
2541  .n_next_nodes = 0,
2542 };
2543 /* *INDENT-ON* */
2544 
2546 
2547 static clib_error_t *
2549 {
2551  clib_memset (hm->options, 0, sizeof (hm->options));
2552  clib_memset (hm->trace, 0, sizeof (hm->trace));
2554  return (0);
2555 }
2556 
2558 
2559 void
2561 {
2563 
2564  hm->next_override = next;
2565 }
2566 
2567 int
2569  int options (vlib_buffer_t * b, ip6_header_t * ip,
2570  ip6_hop_by_hop_option_t * opt),
2571  u8 * trace (u8 * s, ip6_hop_by_hop_option_t * opt))
2572 {
2573  ip6_main_t *im = &ip6_main;
2575 
2576  ASSERT ((u32) option < ARRAY_LEN (hm->options));
2577 
2578  /* Already registered */
2579  if (hm->options[option])
2580  return (-1);
2581 
2582  hm->options[option] = options;
2583  hm->trace[option] = trace;
2584 
2585  /* Set global variable */
2586  im->hbh_enabled = 1;
2587 
2588  return (0);
2589 }
2590 
2591 int
2593 {
2594  ip6_main_t *im = &ip6_main;
2596 
2597  ASSERT ((u32) option < ARRAY_LEN (hm->options));
2598 
2599  /* Not registered */
2600  if (!hm->options[option])
2601  return (-1);
2602 
2603  hm->options[option] = NULL;
2604  hm->trace[option] = NULL;
2605 
2606  /* Disable global knob if this was the last option configured */
2607  int i;
2608  bool found = false;
2609  for (i = 0; i < 256; i++)
2610  {
2611  if (hm->options[option])
2612  {
2613  found = true;
2614  break;
2615  }
2616  }
2617  if (!found)
2618  im->hbh_enabled = 0;
2619 
2620  return (0);
2621 }
2622 
2623 /* Global IP6 main. */
2625 
2626 static clib_error_t *
2628 {
2629  ip6_main_t *im = &ip6_main;
2630  clib_error_t *error;
2631  uword i;
2632 
2633  if ((error = vlib_call_init_function (vm, vnet_feature_init)))
2634  return error;
2635 
2636  for (i = 0; i < ARRAY_LEN (im->fib_masks); i++)
2637  {
2638  u32 j, i0, i1;
2639 
2640  i0 = i / 32;
2641  i1 = i % 32;
2642 
2643  for (j = 0; j < i0; j++)
2644  im->fib_masks[i].as_u32[j] = ~0;
2645 
2646  if (i1)
2647  im->fib_masks[i].as_u32[i0] =
2648  clib_host_to_net_u32 (pow2_mask (i1) << (32 - i1));
2649  }
2650 
2651  ip_lookup_init (&im->lookup_main, /* is_ip6 */ 1);
2652 
2653  if (im->lookup_table_nbuckets == 0)
2655 
2657 
2658  if (im->lookup_table_size == 0)
2660 
2661  clib_bihash_init_24_8 (&(im->ip6_table[IP6_FIB_TABLE_FWDING].ip6_hash),
2662  "ip6 FIB fwding table",
2664  clib_bihash_init_24_8 (&im->ip6_table[IP6_FIB_TABLE_NON_FWDING].ip6_hash,
2665  "ip6 FIB non-fwding table",
2667  clib_bihash_init_40_8 (&im->ip6_mtable.ip6_mhash,
2668  "ip6 mFIB table",
2670 
2671  /* Create FIB with index 0 and table id of 0. */
2676 
2677  {
2678  pg_node_t *pn;
2679  pn = pg_get_node (ip6_lookup_node.index);
2681  }
2682 
2683  /* Unless explicitly configured, don't process HBH options */
2684  im->hbh_enabled = 0;
2685 
2686  {
2687  icmp6_neighbor_solicitation_header_t p;
2688 
2689  clib_memset (&p, 0, sizeof (p));
2690 
2691  p.ip.ip_version_traffic_class_and_flow_label =
2692  clib_host_to_net_u32 (0x6 << 28);
2693  p.ip.payload_length =
2694  clib_host_to_net_u16 (sizeof (p) -
2696  (icmp6_neighbor_solicitation_header_t, neighbor));
2697  p.ip.protocol = IP_PROTOCOL_ICMP6;
2698  p.ip.hop_limit = 255;
2699  ip6_set_solicited_node_multicast_address (&p.ip.dst_address, 0);
2700 
2701  p.neighbor.icmp.type = ICMP6_neighbor_solicitation;
2702 
2703  p.link_layer_option.header.type =
2704  ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address;
2705  p.link_layer_option.header.n_data_u64s =
2706  sizeof (p.link_layer_option) / sizeof (u64);
2707 
2710  &p, sizeof (p),
2711  /* alloc chunk size */ 8,
2712  "ip6 neighbor discovery");
2713  }
2714 
2715  return error;
2716 }
2717 
2719 
2720 void
2722  u8 * mac)
2723 {
2724  ip->as_u64[0] = clib_host_to_net_u64 (0xFE80000000000000ULL);
2725  /* Invert the "u" bit */
2726  ip->as_u8[8] = mac[0] ^ (1 << 1);
2727  ip->as_u8[9] = mac[1];
2728  ip->as_u8[10] = mac[2];
2729  ip->as_u8[11] = 0xFF;
2730  ip->as_u8[12] = 0xFE;
2731  ip->as_u8[13] = mac[3];
2732  ip->as_u8[14] = mac[4];
2733  ip->as_u8[15] = mac[5];
2734 }
2735 
2736 void
2738  ip6_address_t * ip)
2739 {
2740  /* Invert the previously inverted "u" bit */
2741  mac[0] = ip->as_u8[8] ^ (1 << 1);
2742  mac[1] = ip->as_u8[9];
2743  mac[2] = ip->as_u8[10];
2744  mac[3] = ip->as_u8[13];
2745  mac[4] = ip->as_u8[14];
2746  mac[5] = ip->as_u8[15];
2747 }
2748 
2749 static clib_error_t *
2751  unformat_input_t * input, vlib_cli_command_t * cmd)
2752 {
2753  u8 mac[6];
2754  ip6_address_t _a, *a = &_a;
2755 
2756  if (unformat (input, "%U", unformat_ethernet_address, mac))
2757  {
2759  vlib_cli_output (vm, "Link local address: %U", format_ip6_address, a);
2761  vlib_cli_output (vm, "Original MAC address: %U",
2763  }
2764 
2765  return 0;
2766 }
2767 
2768 /*?
2769  * This command converts the given MAC Address into an IPv6 link-local
2770  * address.
2771  *
2772  * @cliexpar
2773  * Example of how to create an IPv6 link-local address:
2774  * @cliexstart{test ip6 link 16:d9:e0:91:79:86}
2775  * Link local address: fe80::14d9:e0ff:fe91:7986
2776  * Original MAC address: 16:d9:e0:91:79:86
2777  * @cliexend
2778 ?*/
2779 /* *INDENT-OFF* */
2781 {
2782  .path = "test ip6 link",
2783  .function = test_ip6_link_command_fn,
2784  .short_help = "test ip6 link <mac-address>",
2785 };
2786 /* *INDENT-ON* */
2787 
2788 int
2789 vnet_set_ip6_flow_hash (u32 table_id, u32 flow_hash_config)
2790 {
2791  u32 fib_index;
2792 
2793  fib_index = fib_table_find (FIB_PROTOCOL_IP6, table_id);
2794 
2795  if (~0 == fib_index)
2796  return VNET_API_ERROR_NO_SUCH_FIB;
2797 
2799  flow_hash_config);
2800 
2801  return 0;
2802 }
2803 
2804 static clib_error_t *
2806  unformat_input_t * input,
2807  vlib_cli_command_t * cmd)
2808 {
2809  int matched = 0;
2810  u32 table_id = 0;
2811  u32 flow_hash_config = 0;
2812  int rv;
2813 
2814  while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
2815  {
2816  if (unformat (input, "table %d", &table_id))
2817  matched = 1;
2818 #define _(a,v) \
2819  else if (unformat (input, #a)) { flow_hash_config |= v; matched=1;}
2821 #undef _
2822  else
2823  break;
2824  }
2825 
2826  if (matched == 0)
2827  return clib_error_return (0, "unknown input `%U'",
2828  format_unformat_error, input);
2829 
2830  rv = vnet_set_ip6_flow_hash (table_id, flow_hash_config);
2831  switch (rv)
2832  {
2833  case 0:
2834  break;
2835 
2836  case -1:
2837  return clib_error_return (0, "no such FIB table %d", table_id);
2838 
2839  default:
2840  clib_warning ("BUG: illegal flow hash config 0x%x", flow_hash_config);
2841  break;
2842  }
2843 
2844  return 0;
2845 }
2846 
2847 /*?
2848  * Configure the set of IPv6 fields used by the flow hash.
2849  *
2850  * @cliexpar
2851  * @parblock
2852  * Example of how to set the flow hash on a given table:
2853  * @cliexcmd{set ip6 flow-hash table 8 dst sport dport proto}
2854  *
2855  * Example of display the configured flow hash:
2856  * @cliexstart{show ip6 fib}
2857  * ipv6-VRF:0, fib_index 0, flow hash: src dst sport dport proto
2858  * @::/0
2859  * unicast-ip6-chain
2860  * [@0]: dpo-load-balance: [index:5 buckets:1 uRPF:5 to:[0:0]]
2861  * [0] [@0]: dpo-drop ip6
2862  * fe80::/10
2863  * unicast-ip6-chain
2864  * [@0]: dpo-load-balance: [index:10 buckets:1 uRPF:10 to:[0:0]]
2865  * [0] [@2]: dpo-receive
2866  * ff02::1/128
2867  * unicast-ip6-chain
2868  * [@0]: dpo-load-balance: [index:8 buckets:1 uRPF:8 to:[0:0]]
2869  * [0] [@2]: dpo-receive
2870  * ff02::2/128
2871  * unicast-ip6-chain
2872  * [@0]: dpo-load-balance: [index:7 buckets:1 uRPF:7 to:[0:0]]
2873  * [0] [@2]: dpo-receive
2874  * ff02::16/128
2875  * unicast-ip6-chain
2876  * [@0]: dpo-load-balance: [index:9 buckets:1 uRPF:9 to:[0:0]]
2877  * [0] [@2]: dpo-receive
2878  * ff02::1:ff00:0/104
2879  * unicast-ip6-chain
2880  * [@0]: dpo-load-balance: [index:6 buckets:1 uRPF:6 to:[0:0]]
2881  * [0] [@2]: dpo-receive
2882  * ipv6-VRF:8, fib_index 1, flow hash: dst sport dport proto
2883  * @::/0
2884  * unicast-ip6-chain
2885  * [@0]: dpo-load-balance: [index:21 buckets:1 uRPF:20 to:[0:0]]
2886  * [0] [@0]: dpo-drop ip6
2887  * @::a:1:1:0:4/126
2888  * unicast-ip6-chain
2889  * [@0]: dpo-load-balance: [index:27 buckets:1 uRPF:26 to:[0:0]]
2890  * [0] [@4]: ipv6-glean: af_packet0
2891  * @::a:1:1:0:7/128
2892  * unicast-ip6-chain
2893  * [@0]: dpo-load-balance: [index:28 buckets:1 uRPF:27 to:[0:0]]
2894  * [0] [@2]: dpo-receive: @::a:1:1:0:7 on af_packet0
2895  * fe80::/10
2896  * unicast-ip6-chain
2897  * [@0]: dpo-load-balance: [index:26 buckets:1 uRPF:25 to:[0:0]]
2898  * [0] [@2]: dpo-receive
2899  * fe80::fe:3eff:fe3e:9222/128
2900  * unicast-ip6-chain
2901  * [@0]: dpo-load-balance: [index:29 buckets:1 uRPF:28 to:[0:0]]
2902  * [0] [@2]: dpo-receive: fe80::fe:3eff:fe3e:9222 on af_packet0
2903  * ff02::1/128
2904  * unicast-ip6-chain
2905  * [@0]: dpo-load-balance: [index:24 buckets:1 uRPF:23 to:[0:0]]
2906  * [0] [@2]: dpo-receive
2907  * ff02::2/128
2908  * unicast-ip6-chain
2909  * [@0]: dpo-load-balance: [index:23 buckets:1 uRPF:22 to:[0:0]]
2910  * [0] [@2]: dpo-receive
2911  * ff02::16/128
2912  * unicast-ip6-chain
2913  * [@0]: dpo-load-balance: [index:25 buckets:1 uRPF:24 to:[0:0]]
2914  * [0] [@2]: dpo-receive
2915  * ff02::1:ff00:0/104
2916  * unicast-ip6-chain
2917  * [@0]: dpo-load-balance: [index:22 buckets:1 uRPF:21 to:[0:0]]
2918  * [0] [@2]: dpo-receive
2919  * @cliexend
2920  * @endparblock
2921 ?*/
2922 /* *INDENT-OFF* */
2924 {
2925  .path = "set ip6 flow-hash",
2926  .short_help =
2927  "set ip6 flow-hash table <table-id> [src] [dst] [sport] [dport] [proto] [reverse]",
2928  .function = set_ip6_flow_hash_command_fn,
2929 };
2930 /* *INDENT-ON* */
2931 
2932 static clib_error_t *
2934  unformat_input_t * input, vlib_cli_command_t * cmd)
2935 {
2936  ip6_main_t *im = &ip6_main;
2937  ip_lookup_main_t *lm = &im->lookup_main;
2938  int i;
2939 
2940  vlib_cli_output (vm, "Protocols handled by ip6_local");
2941  for (i = 0; i < ARRAY_LEN (lm->local_next_by_ip_protocol); i++)
2942  {
2944  {
2945 
2946  u32 node_index = vlib_get_node (vm,
2947  ip6_local_node.index)->
2948  next_nodes[lm->local_next_by_ip_protocol[i]];
2949  vlib_cli_output (vm, "%d: %U", i, format_vlib_node_name, vm,
2950  node_index);
2951  }
2952  }
2953  return 0;
2954 }
2955 
2956 
2957 
2958 /*?
2959  * Display the set of protocols handled by the local IPv6 stack.
2960  *
2961  * @cliexpar
2962  * Example of how to display local protocol table:
2963  * @cliexstart{show ip6 local}
2964  * Protocols handled by ip6_local
2965  * 17
2966  * 43
2967  * 58
2968  * 115
2969  * @cliexend
2970 ?*/
2971 /* *INDENT-OFF* */
2973 {
2974  .path = "show ip6 local",
2975  .function = show_ip6_local_command_fn,
2976  .short_help = "show ip6 local",
2977 };
2978 /* *INDENT-ON* */
2979 
2980 int
2982  u32 table_index)
2983 {
2984  vnet_main_t *vnm = vnet_get_main ();
2986  ip6_main_t *ipm = &ip6_main;
2987  ip_lookup_main_t *lm = &ipm->lookup_main;
2989  ip6_address_t *if_addr;
2990 
2991  if (pool_is_free_index (im->sw_interfaces, sw_if_index))
2992  return VNET_API_ERROR_NO_MATCHING_INTERFACE;
2993 
2994  if (table_index != ~0 && pool_is_free_index (cm->tables, table_index))
2995  return VNET_API_ERROR_NO_SUCH_ENTRY;
2996 
2999 
3000  if_addr = ip6_interface_first_address (ipm, sw_if_index);
3001 
3002  if (NULL != if_addr)
3003  {
3004  fib_prefix_t pfx = {
3005  .fp_len = 128,
3006  .fp_proto = FIB_PROTOCOL_IP6,
3007  .fp_addr.ip6 = *if_addr,
3008  };
3009  u32 fib_index;
3010 
3012  sw_if_index);
3013 
3014 
3015  if (table_index != (u32) ~ 0)
3016  {
3017  dpo_id_t dpo = DPO_INVALID;
3018 
3019  dpo_set (&dpo,
3020  DPO_CLASSIFY,
3021  DPO_PROTO_IP6,
3022  classify_dpo_create (DPO_PROTO_IP6, table_index));
3023 
3025  &pfx,
3027  FIB_ENTRY_FLAG_NONE, &dpo);
3028  dpo_reset (&dpo);
3029  }
3030  else
3031  {
3032  fib_table_entry_special_remove (fib_index,
3033  &pfx, FIB_SOURCE_CLASSIFY);
3034  }
3035  }
3036 
3037  return 0;
3038 }
3039 
3040 static clib_error_t *
3042  unformat_input_t * input,
3043  vlib_cli_command_t * cmd)
3044 {
3045  u32 table_index = ~0;
3046  int table_index_set = 0;
3047  u32 sw_if_index = ~0;
3048  int rv;
3049 
3050  while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
3051  {
3052  if (unformat (input, "table-index %d", &table_index))
3053  table_index_set = 1;
3054  else if (unformat (input, "intfc %U", unformat_vnet_sw_interface,
3055  vnet_get_main (), &sw_if_index))
3056  ;
3057  else
3058  break;
3059  }
3060 
3061  if (table_index_set == 0)
3062  return clib_error_return (0, "classify table-index must be specified");
3063 
3064  if (sw_if_index == ~0)
3065  return clib_error_return (0, "interface / subif must be specified");
3066 
3067  rv = vnet_set_ip6_classify_intfc (vm, sw_if_index, table_index);
3068 
3069  switch (rv)
3070  {
3071  case 0:
3072  break;
3073 
3074  case VNET_API_ERROR_NO_MATCHING_INTERFACE:
3075  return clib_error_return (0, "No such interface");
3076 
3077  case VNET_API_ERROR_NO_SUCH_ENTRY:
3078  return clib_error_return (0, "No such classifier table");
3079  }
3080  return 0;
3081 }
3082 
3083 /*?
3084  * Assign a classification table to an interface. The classification
3085  * table is created using the '<em>classify table</em>' and '<em>classify session</em>'
3086  * commands. Once the table is create, use this command to filter packets
3087  * on an interface.
3088  *
3089  * @cliexpar
3090  * Example of how to assign a classification table to an interface:
3091  * @cliexcmd{set ip6 classify intfc GigabitEthernet2/0/0 table-index 1}
3092 ?*/
3093 /* *INDENT-OFF* */
3095 {
3096  .path = "set ip6 classify",
3097  .short_help =
3098  "set ip6 classify intfc <interface> table-index <classify-idx>",
3099  .function = set_ip6_classify_command_fn,
3100 };
3101 /* *INDENT-ON* */
3102 
3103 static clib_error_t *
3105 {
3106  ip6_main_t *im = &ip6_main;
3107  uword heapsize = 0;
3108  u32 tmp;
3109  u32 nbuckets = 0;
3110 
3111  while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
3112  {
3113  if (unformat (input, "hash-buckets %d", &tmp))
3114  nbuckets = tmp;
3115  else if (unformat (input, "heap-size %U",
3116  unformat_memory_size, &heapsize))
3117  ;
3118  else
3119  return clib_error_return (0, "unknown input '%U'",
3120  format_unformat_error, input);
3121  }
3122 
3123  im->lookup_table_nbuckets = nbuckets;
3124  im->lookup_table_size = heapsize;
3125 
3126  return 0;
3127 }
3128 
3130 
3131 /*
3132  * fd.io coding-style-patch-verification: ON
3133  *
3134  * Local Variables:
3135  * eval: (c-set-style "gnu")
3136  * End:
3137  */
static vlib_cli_command_t set_ip6_flow_hash_command
(constructor) VLIB_CLI_COMMAND (set_ip6_flow_hash_command)
Definition: ip6_forward.c:2923
static uword ip6_rewrite(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
Definition: ip6_forward.c:1973
u8 * format_ip6_forward_next_trace(u8 *s, va_list *args)
Definition: ip6_forward.c:802
#define vec_validate(V, I)
Make sure vector is long enough for given index (no header, unspecified alignment) ...
Definition: vec.h:439
#define foreach_ip_interface_address(lm, a, sw_if_index, loop, body)
Definition: lookup.h:182
#define vnet_rewrite_one_header(rw0, p0, most_likely_size)
Definition: rewrite.h:277
u16 lb_n_buckets
number of buckets in the load-balance.
Definition: load_balance.h:116
#define HBH_OPTION_TYPE_DISCARD_UNKNOWN_ICMP
vmrglw vmrglh hi
u32 mfib_table_find_or_create_and_lock(fib_protocol_t proto, u32 table_id, mfib_source_t src)
Get the index of the FIB for a Table-ID.
Definition: mfib_table.c:562
static uword ip6_local_inline(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame, int head_of_feature_arc)
Definition: ip6_forward.c:1094
typedef address
Definition: ip_types.api:30
static vlib_cli_command_t trace
(constructor) VLIB_CLI_COMMAND (trace)
Definition: vlib_api_cli.c:862
u32 flags
Definition: vhost_user.h:115
vl_api_address_t src
Definition: vxlan_gbp.api:32
static vlib_cli_command_t test_link_command
(constructor) VLIB_CLI_COMMAND (test_link_command)
Definition: ip6_forward.c:2780
static u8 * format_ip6_lookup_trace(u8 *s, va_list *args)
Definition: ip6_forward.c:816
#define CLIB_UNUSED(x)
Definition: clib.h:82
format_function_t format_ip_adjacency_packet_data
Definition: format.h:59
static int fib_urpf_check_size(index_t ui)
Data-Plane function to check the size of an uRPF list, (i.e.
void ip_frag_set_vnet_buffer(vlib_buffer_t *b, u16 mtu, u8 next_index, u8 flags)
Definition: ip_frag.c:243
format_function_t format_vlib_node_name
Definition: node_funcs.h:1141
static u8 ip6_next_proto_is_tcp_udp(vlib_buffer_t *p0, ip6_header_t *ip0, u32 *udp_offset0)
Definition: ip6_forward.c:1072
a
Definition: bitmap.h:538
static void vlib_increment_combined_counter(vlib_combined_counter_main_t *cm, u32 thread_index, u32 index, u64 n_packets, u64 n_bytes)
Increment a combined counter.
Definition: counter.h:220
static uword ip6_midchain(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
Definition: ip6_forward.c:2003
u32 * mfib_index_by_sw_if_index
Table index indexed by software interface.
Definition: ip6.h:196
uword lookup_table_size
Definition: ip6.h:224
clib_error_t * ip6_neighbor_set_link_local_address(vlib_main_t *vm, u32 sw_if_index, ip6_address_t *address)
#define IP6_LOOKUP_NEXT_NODES
Definition: adj.h:122
int dpo_is_adj(const dpo_id_t *dpo)
Return TRUE is the DPO is any type of adjacency.
Definition: dpo.c:277
vnet_main_t * vnet_get_main(void)
Definition: misc.c:47
static vnet_hw_interface_t * vnet_get_sup_hw_interface(vnet_main_t *vnm, u32 sw_if_index)
static clib_error_t * set_ip6_classify_command_fn(vlib_main_t *vm, unformat_input_t *input, vlib_cli_command_t *cmd)
Definition: ip6_forward.c:3041
vnet_interface_main_t interface_main
Definition: vnet.h:56
static u8 ip6_scan_hbh_options(vlib_buffer_t *b0, ip6_header_t *ip0, ip6_hop_by_hop_header_t *hbh0, ip6_hop_by_hop_option_t *opt0, ip6_hop_by_hop_option_t *limit0, u32 *next0)
Definition: ip6_forward.c:2217
The table that stores ALL routes learned by the DP.
Definition: ip6.h:133
#define PREDICT_TRUE(x)
Definition: clib.h:112
#define foreach_ip6_hop_by_hop_error
Definition: ip6_forward.c:2089
u8 as_u8[16]
Definition: ip6_packet.h:48
u64 as_u64[2]
Definition: ip6_packet.h:51
unsigned long u64
Definition: types.h:89
static ip6_address_t * ip6_interface_address_matching_destination(ip6_main_t *im, ip6_address_t *dst, u32 sw_if_index, ip_interface_address_t **result_ia)
Definition: ip6.h:338
vlib_node_registration_t ip6_lookup_node
(constructor) VLIB_REGISTER_NODE (ip6_lookup_node)
Definition: ip6_forward.c:546
static uword ip6_rewrite_inline(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame, int do_counters, int is_midchain, int is_mcast)
Definition: ip6_forward.c:1620
#define clib_memcpy_fast(a, b, c)
Definition: string.h:81
static u8 * format_ip6_rewrite_trace(u8 *s, va_list *args)
Definition: ip6_forward.c:833
#define NULL
Definition: clib.h:58
clib_memset(h->entries, 0, sizeof(h->entries[0]) *entries)
IP unicast adjacency.
Definition: adj.h:221
u32 fib_table_get_index_for_sw_if_index(fib_protocol_t proto, u32 sw_if_index)
Get the index of the FIB bound to the interface.
Definition: fib_table.c:956
flow_hash_config_t lb_hash_config
the hash config to use when selecting a bucket.
Definition: load_balance.h:161
static const dpo_id_t * load_balance_get_fwd_bucket(const load_balance_t *lb, u16 bucket)
u8 * ip_enabled_by_sw_if_index
Definition: ip6.h:199
u32 thread_index
Definition: main.h:179
This packet is to be rewritten and forwarded to the next processing node.
Definition: adj.h:73
u32 index_t
A Data-Path Object is an object that represents actions that are applied to packets are they are swit...
Definition: dpo.h:41
#define vec_add1(V, E)
Add 1 element to end of vector (unspecified alignment).
Definition: vec.h:525
int ip6_hbh_unregister_option(u8 option)
Definition: ip6_forward.c:2592
int i
static clib_error_t * ip6_config(vlib_main_t *vm, unformat_input_t *input)
Definition: ip6_forward.c:3104
static uword ip6_lookup_inline(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
Definition: ip6_forward.h:55
static u32 format_get_indent(u8 *s)
Definition: format.h:72
#define STRUCT_OFFSET_OF(t, f)
Definition: clib.h:65
uword ip_csum_t
Definition: ip_packet.h:181
static vnet_sw_interface_t * vnet_get_sw_interface(vnet_main_t *vnm, u32 sw_if_index)
static clib_error_t * test_ip6_link_command_fn(vlib_main_t *vm, unformat_input_t *input, vlib_cli_command_t *cmd)
Definition: ip6_forward.c:2750
static ip_csum_t ip_csum_with_carry(ip_csum_t sum, ip_csum_t x)
Definition: ip_packet.h:184
u32 ip6_neighbor_sw_interface_add_del(vnet_main_t *vnm, u32 sw_if_index, u32 is_add)
create and initialize router advertisement parameters with default values for this intfc ...
u8 * format(u8 *s, const char *fmt,...)
Definition: format.c:419
unformat_function_t unformat_vnet_sw_interface
vlib_node_registration_t ip6_rewrite_mcast_node
(constructor) VLIB_REGISTER_NODE (ip6_rewrite_mcast_node)
Definition: ip6_forward.c:2061
static u32 ip6_fib_table_fwding_lookup(ip6_main_t *im, u32 fib_index, const ip6_address_t *dst)
Definition: ip6_fib.h:67
vlib_error_t * errors
Vector of errors for this node.
Definition: node.h:493
static char * ip6_hop_by_hop_error_strings[]
Definition: ip6_forward.c:2117
static uword vlib_buffer_length_in_chain(vlib_main_t *vm, vlib_buffer_t *b)
Get length in bytes of the buffer chain.
Definition: buffer_funcs.h:267
Definition: fib_entry.h:277
static uword ip6_load_balance(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
Definition: ip6_forward.c:560
ip6_address_t src_address
Definition: ip6_packet.h:378
u8 mcast_feature_arc_index
Feature arc indices.
Definition: lookup.h:138
format_function_t format_vnet_sw_if_index_name
static uword vlib_node_add_next(vlib_main_t *vm, uword node, uword next_node)
Definition: node_funcs.h:1092
static uword ip6_hop_by_hop(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
Definition: ip6_forward.c:2294
unsigned char u8
Definition: types.h:56
ip_lookup_next_t
An adjacency is a representation of an attached L3 peer.
Definition: adj.h:50
uword as_uword[16/sizeof(uword)]
Definition: ip6_packet.h:52
VNET_SW_INTERFACE_ADD_DEL_FUNCTION(ip6_sw_interface_add_del)
static pg_node_t * pg_get_node(uword node_index)
Definition: pg.h:357
VNET_FEATURE_ARC_INIT(ip6_unicast, static)
fib_node_index_t fib_table_entry_update_one_path(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)
Update the entry to have just one path.
Definition: fib_table.c:772
vlib_packet_template_t discover_neighbor_packet_template
Definition: ip6.h:220
u32 ip6_tcp_udp_icmp_validate_checksum(vlib_main_t *vm, vlib_buffer_t *p0)
Definition: ip6_forward.c:1020
u8 output_feature_arc_index
Definition: lookup.h:140
vlib_rx_or_tx_t
Definition: defs.h:44
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
ip6_main_t ip6_main
Definition: ip6_forward.c:2624
clib_error_t * ip6_sw_interface_add_del(vnet_main_t *vnm, u32 sw_if_index, u32 is_add)
Definition: ip6_forward.c:497
union ip_adjacency_t_::@42 sub_type
static u8 * format_ip6_hop_by_hop_trace(u8 *s, va_list *args)
Definition: ip6_forward.c:2168
i16 current_data
signed offset in data[], pre_data[] that we are currently processing.
Definition: buffer.h:110
u8 * format_ethernet_address(u8 *s, va_list *args)
Definition: format.c:44
clib_bihash_24_8_t ip6_hash
Definition: ip6.h:144
void * vlib_packet_template_get_packet(vlib_main_t *vm, vlib_packet_template_t *t, u32 *bi_result)
Definition: buffer.c:688
#define pool_foreach(VAR, POOL, BODY)
Iterate through pool.
Definition: pool.h:490
#define vlib_prefetch_buffer_with_index(vm, bi, type)
Prefetch buffer metadata by buffer index The first 64 bytes of buffer contains most header informatio...
Definition: buffer_funcs.h:341
static clib_error_t * show_ip6_local_command_fn(vlib_main_t *vm, unformat_input_t *input, vlib_cli_command_t *cmd)
Definition: ip6_forward.c:2933
#define VLIB_INIT_FUNCTION(x)
Definition: init.h:163
format_function_t format_ip_adjacency
Definition: format.h:58
void fib_table_entry_special_remove(u32 fib_index, const fib_prefix_t *prefix, fib_source_t source)
Remove a &#39;special&#39; entry from the FIB.
Definition: fib_table.c:407
u32 sw_if_index
Definition: vxlan_gbp.api:37
#define always_inline
Definition: clib.h:98
static uword pow2_mask(uword x)
Definition: clib.h:220
u16 lb_n_buckets_minus_1
number of buckets in the load-balance - 1.
Definition: load_balance.h:121
static vlib_node_registration_t ip6_mcast_midchain_node
(constructor) VLIB_REGISTER_NODE (ip6_mcast_midchain_node)
Definition: ip6_forward.c:2072
static clib_error_t * set_ip6_flow_hash_command_fn(vlib_main_t *vm, unformat_input_t *input, vlib_cli_command_t *cmd)
Definition: ip6_forward.c:2805
u8 * format_white_space(u8 *s, va_list *va)
Definition: std-formats.c:113
#define vlib_prefetch_buffer_header(b, type)
Prefetch buffer metadata.
Definition: buffer.h:188
#define IP6_FIB_DEFAULT_HASH_NUM_BUCKETS
Definition: ip6.h:58
Aggregrate type for a prefix.
Definition: fib_types.h:203
vlib_frame_t * vlib_get_frame_to_node(vlib_main_t *vm, u32 to_node_index)
Definition: main.c:181
#define clib_error_return(e, args...)
Definition: error.h:99
u8 pre_data[VLIB_BUFFER_PRE_DATA_SIZE]
Space for inserting data before buffer start.
Definition: buffer.h:168
void adj_unlock(adj_index_t adj_index)
Release a reference counting lock on the adjacency.
Definition: adj.c:318
unsigned int u32
Definition: types.h:88
#define clib_error_create(args...)
Definition: error.h:96
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:1064
u16 fp_len
The mask length.
Definition: fib_types.h:207
#define vlib_call_init_function(vm, x)
Definition: init.h:260
u8 * format_ip6_hop_by_hop_ext_hdr(u8 *s, va_list *args)
Definition: ip6_forward.c:2124
ip6_hop_by_hop_error_t
Definition: ip6_forward.c:2095
static clib_error_t * vnet_feature_init(vlib_main_t *vm)
Definition: feature.c:22
static uword ip6_flow_classify(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
static uword ip6_rewrite_bcast(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
Definition: ip6_forward.c:1983
void icmp6_error_set_vnet_buffer(vlib_buffer_t *b, u8 type, u8 code, u32 data)
Definition: icmp6.c:446
u32 lookup_table_nbuckets
Definition: ip6.h:223
Definition: fib_entry.h:275
vnet_api_error_t api_errno
Definition: vnet.h:78
The identity of a DPO is a combination of its type and its instance number/index of objects of that t...
Definition: dpo.h:168
Definition: fib_entry.h:280
static vlib_cli_command_t show_ip6_local
(constructor) VLIB_CLI_COMMAND (show_ip6_local)
Definition: ip6_forward.c:2972
#define pool_elt_at_index(p, i)
Returns pointer to element at given index.
Definition: pool.h:511
vlib_node_registration_t ip6_rewrite_bcast_node
(constructor) VLIB_REGISTER_NODE (ip6_rewrite_bcast_node)
Definition: ip6_forward.c:2051
static uword ip6_inacl(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
static uword ip6_outacl(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
void vlib_packet_template_init(vlib_main_t *vm, vlib_packet_template_t *t, void *packet_data, uword n_packet_data_bytes, uword min_n_buffers_each_alloc, char *fmt,...)
Definition: buffer.c:665
u16 current_length
Nbytes between current data and the end of this buffer.
Definition: buffer.h:114
VLIB_NODE_FUNCTION_MULTIARCH(ip6_lookup_node, ip6_lookup)
u32 * classify_table_index_by_sw_if_index
First table index to use for this interface, ~0 => none.
Definition: lookup.h:135
ip46_address_t fp_addr
The address type is not deriveable from the fp_addr member.
Definition: fib_types.h:226
index_t classify_dpo_create(dpo_proto_t proto, u32 classify_table_index)
Definition: classify_dpo.c:43
static void ip6_del_interface_routes(ip6_main_t *im, u32 fib_index, ip6_address_t *address, u32 address_length)
Definition: ip6_forward.c:121
u8 address_length
Definition: ip_types.api:37
static const dpo_id_t * load_balance_get_bucket_i(const load_balance_t *lb, u32 bucket)
Definition: load_balance.h:228
vlib_node_registration_t ip6_input_node
(constructor) VLIB_REGISTER_NODE (ip6_input_node)
Definition: ip6_input.c:228
struct _unformat_input_t unformat_input_t
unsigned short u16
Definition: types.h:57
#define IP6_FIB_DEFAULT_HASH_MEMORY_SIZE
Definition: ip6.h:59
void vlib_put_frame_to_node(vlib_main_t *vm, u32 to_node_index, vlib_frame_t *f)
Definition: main.c:190
static void * vlib_buffer_get_current(vlib_buffer_t *b)
Get pointer to current data to process.
Definition: buffer.h:214
int vnet_set_ip6_flow_hash(u32 table_id, u32 flow_hash_config)
Definition: ip6_forward.c:2789
static u32 ip6_compute_flow_hash(const ip6_header_t *ip, flow_hash_config_t flow_hash_config)
Definition: ip6.h:452
The FIB DPO provieds;.
Definition: load_balance.h:106
#define PREDICT_FALSE(x)
Definition: clib.h:111
u8 local_next_by_ip_protocol[256]
Table mapping ip protocol to ip[46]-local node next index.
Definition: lookup.h:153
vnet_sw_interface_flags_t flags
Definition: interface.h:706
static clib_error_t * ip6_hop_by_hop_init(vlib_main_t *vm)
Definition: ip6_forward.c:2548
vl_api_address_union_t src_address
Definition: ip_types.api:44
void vnet_sw_interface_update_unnumbered(u32 unnumbered_sw_if_index, u32 ip_sw_if_index, u8 enable)
Definition: interface.c:1469
load_balance_main_t load_balance_main
The one instance of load-balance main.
Definition: load_balance.c:55
#define vlib_validate_buffer_enqueue_x2(vm, node, next_index, to_next, n_left_to_next, bi0, bi1, next0, next1)
Finish enqueueing two buffers forward in the graph.
Definition: buffer_node.h:70
#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
VNET_FEATURE_INIT(ip6_flow_classify, static)
#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
int ip6_hbh_register_option(u8 option, int options(vlib_buffer_t *b, ip6_header_t *ip, ip6_hop_by_hop_option_t *opt), u8 *trace(u8 *s, ip6_hop_by_hop_option_t *opt))
Definition: ip6_forward.c:2568
static uword ip6_not_enabled(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
Definition: ip6_punt_drop.c:92
vlib_combined_counter_main_t adjacency_counters
Adjacency packet counters.
Definition: adj.c:25
void ip6_forward_next_trace(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame, vlib_rx_or_tx_t which_adj_index)
Definition: ip6_forward.c:852
u8 packet_data[128 - 1 *sizeof(u32)]
Definition: ip6_forward.c:797
vlib_error_t error
Error code for buffers to be enqueued to error handler.
Definition: buffer.h:139
static uword ip6_local(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
Definition: ip6_forward.c:1407
u32 as_u32[4]
Definition: ip6_packet.h:50
ip6_address_t fib_masks[129]
Definition: ip6.h:190
void ip6_mfib_interface_enable_disable(u32 sw_if_index, int is_enable)
Add/remove the interface from the accepting list of the special MFIB entries.
Definition: ip6_mfib.c:232
#define OI_DECAP
Definition: ip6_forward.c:57
#define VLIB_EARLY_CONFIG_FUNCTION(x, n,...)
Definition: init.h:216
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:144
u16 n_vectors
Definition: node.h:420
format_function_t format_ip6_address
Definition: format.h:93
#define CLIB_PREFETCH(addr, size, type)
Definition: cache.h:79
vlib_main_t * vm
Definition: buffer.c:301
ip6_address_t * ip6_interface_first_address(ip6_main_t *im, u32 sw_if_index)
get first IPv6 interface address
Definition: ip6_forward.c:174
vl_api_address_t dst
Definition: vxlan_gbp.api:33
#define vec_free(V)
Free vector&#39;s memory (no header).
Definition: vec.h:341
static vlib_node_registration_t ip6_local_node
(constructor) VLIB_REGISTER_NODE (ip6_local_node)
Definition: ip6_forward.c:1413
void fib_table_entry_delete(u32 fib_index, const fib_prefix_t *prefix, fib_source_t source)
Delete a FIB entry.
Definition: fib_table.c:853
void fib_table_set_flow_hash_config(u32 fib_index, fib_protocol_t proto, flow_hash_config_t hash_config)
Set the flow hash configured used by the table.
Definition: fib_table.c:1022
clib_error_t * ip6_sw_interface_admin_up_down(vnet_main_t *vnm, u32 sw_if_index, u32 flags)
Definition: ip6_forward.c:330
vlib_node_registration_t ip6_midchain_node
(constructor) VLIB_REGISTER_NODE (ip6_midchain_node)
Definition: ip6_forward.c:2023
static ip_csum_t ip_incremental_checksum(ip_csum_t sum, void *_data, uword n_bytes)
Definition: ip_packet.h:254
#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
This table stores the routes that are used to forward traffic.
Definition: ip6.h:126
unformat_function_t * unformat_edit
Definition: pg.h:311
void ip_lookup_init(ip_lookup_main_t *lm, u32 is_ip6)
Definition: lookup.c:203
#define pool_is_free_index(P, I)
Use free bitmap to query whether given index is free.
Definition: pool.h:283
u32 adj_index_t
An index for adjacencies.
Definition: adj_types.h:30
#define ARRAY_LEN(x)
Definition: clib.h:62
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:452
void ip6_ethernet_mac_address_from_link_local_address(u8 *mac, ip6_address_t *ip)
Definition: ip6_forward.c:2737
void dpo_set(dpo_id_t *dpo, dpo_type_t type, dpo_proto_t proto, index_t index)
Set/create a DPO ID The DPO will be locked.
Definition: dpo.c:185
vlib_combined_counter_main_t lbm_via_counters
Definition: load_balance.h:47
u8 hbh_enabled
Definition: ip6.h:238
u8 builtin_protocol_by_ip_protocol[256]
IP_BUILTIN_PROTOCOL_{TCP,UDP,ICMP,OTHER} by protocol in IP header.
Definition: lookup.h:156
#define VLIB_CLI_COMMAND(x,...)
Definition: cli.h:155
struct _vnet_classify_main vnet_classify_main_t
Definition: vnet_classify.h:67
#define foreach_flow_hash_bit
Definition: lookup.h:72
fib_node_index_t fib_table_entry_special_dpo_add(u32 fib_index, const fib_prefix_t *prefix, fib_source_t source, fib_entry_flag_t flags, const dpo_id_t *dpo)
Add a &#39;special&#39; entry to the FIB that links to the DPO passed A special entry is an entry that the FI...
Definition: fib_table.c:307
ip6_add_del_interface_address_function_t * function
Definition: ip6.h:103
signed int i32
Definition: types.h:77
u16 cached_next_index
Next frame index that vector arguments were last enqueued to last time this node ran.
Definition: node.h:537
void ip6_register_protocol(u32 protocol, u32 node_index)
Definition: ip6_forward.c:1461
static uword ip6_local_end_of_arc(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
Definition: ip6_forward.c:1435
uword unformat_ethernet_address(unformat_input_t *input, va_list *args)
Definition: format.c:233
#define ASSERT(truth)
index_t lb_urpf
This is the index of the uRPF list for this LB.
Definition: load_balance.h:156
clib_error_t * ip6_probe_neighbor(vlib_main_t *vm, ip6_address_t *dst, u32 sw_if_index, u8 refresh)
Definition: ip6_forward.c:1473
VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION(ip6_sw_interface_admin_up_down)
ip6_hop_by_hop_main_t ip6_hop_by_hop_main
Definition: ip6_forward.c:2087
ip_lookup_main_t lookup_main
Definition: ip6.h:178
void ip6_hbh_set_next_override(uword next)
Definition: ip6_forward.c:2560
static vlib_node_registration_t ip6_local_end_of_arc_node
(constructor) VLIB_REGISTER_NODE (ip6_local_end_of_arc_node)
Definition: ip6_forward.c:1442
static load_balance_t * load_balance_get(index_t lbi)
Definition: load_balance.h:219
The default route source.
Definition: fib_entry.h:137
Classify.
Definition: fib_entry.h:44
static void ip6_addr_fib_init(ip6_address_fib_t *addr_fib, const ip6_address_t *address, u32 fib_index)
Definition: ip6_packet.h:125
u32 next_buffer
Next buffer for this linked-list of buffers.
Definition: buffer.h:130
u32 fib_table_find_or_create_and_lock(fib_protocol_t proto, u32 table_id, fib_source_t src)
Get the index of the FIB for a Table-ID.
Definition: fib_table.c:1123
vlib_node_registration_t ip6_hop_by_hop_node
(constructor) VLIB_REGISTER_NODE (ip6_hop_by_hop_node)
Definition: ip6_forward.c:2115
static void ip6_mtu_check(vlib_buffer_t *b, u16 packet_bytes, u16 adj_packet_bytes, bool is_locally_generated, u32 *next, u32 *error)
Definition: ip6_forward.c:1595
#define HBH_OPTION_TYPE_DISCARD_UNKNOWN_ICMP_NOT_MCAST
static void vlib_buffer_advance(vlib_buffer_t *b, word l)
Advance current data pointer by the supplied (signed!) amount.
Definition: buffer.h:233
vnet_classify_main_t vnet_classify_main
Definition: vnet_classify.c:22
int vnet_set_ip6_classify_intfc(vlib_main_t *vm, u32 sw_if_index, u32 table_index)
Definition: ip6_forward.c:2981
static uword ip6_address_is_link_local_unicast(const ip6_address_t *a)
Definition: ip6_packet.h:321
#define clib_mem_unaligned(pointer, type)
Definition: types.h:155
format_function_t format_ip6_header
Definition: format.h:97
static uword ip6_address_is_equal(const ip6_address_t *a, const ip6_address_t *b)
Definition: ip6_packet.h:235
Route added as a result of interface configuration.
Definition: fib_entry.h:54
static uword ip6_address_is_multicast(const ip6_address_t *a)
Definition: ip6_packet.h:172
ip6_fib_table_instance_t ip6_table[IP6_FIB_NUM_TABLES]
The two FIB tables; fwding and non-fwding.
Definition: ip6.h:171
#define VNET_FEATURES(...)
Definition: feature.h:435
static int ip6_locate_header(vlib_buffer_t *p0, ip6_header_t *ip0, int find_hdr_type, u32 *offset)
Definition: ip6.h:535
static vlib_main_t * vlib_get_main(void)
Definition: global_funcs.h:23
vlib_node_registration_t ip6_rewrite_node
(constructor) VLIB_REGISTER_NODE (ip6_rewrite_node)
Definition: ip6_forward.c:2034
static uword ip6_mcast_midchain(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
Definition: ip6_forward.c:2013
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:57
#define vec_elt(v, i)
Get vector value at index i.
ip6_address_t ip6_neighbor_get_link_local_address(u32 sw_if_index)
Definition: ip6_neighbor.c:241
struct _vlib_node_registration vlib_node_registration_t
u8 ucast_feature_arc_index
Definition: lookup.h:139
This packets needs to go to ICMP error.
Definition: adj.h:79
void ip6_sw_interface_enable_disable(u32 sw_if_index, u32 is_enable)
Definition: ip6_forward.c:142
Definition: defs.h:47
static void vnet_ip_mcast_fixup_header(u32 dst_mcast_mask, u32 dst_mcast_offset, u32 *addr, u8 *packet0)
Definition: rewrite.h:289
#define HBH_OPTION_TYPE_DISCARD_UNKNOWN
u16 payload_length
Definition: ip6_packet.h:369
index_t dpoi_index
the index of objects of that type
Definition: dpo.h:184
static void ip6_set_solicited_node_multicast_address(ip6_address_t *a, u32 id)
Definition: ip6_packet.h:195
static uword ip6_rewrite_mcast(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
Definition: ip6_forward.c:1993
#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
struct ip_adjacency_t_::@42::@44 midchain
IP_LOOKUP_NEXT_MIDCHAIN.
Definition: fib_entry.h:276
static uword max_log2(uword x)
Definition: clib.h:191
#define IP6_MCAST_ADDR_MASK
This bits of an IPv6 address to mask to construct a multicast MAC address.
Definition: ip6_forward.c:1592
u64 uword
Definition: types.h:112
void ip6_link_local_address_from_ethernet_mac_address(ip6_address_t *ip, u8 *mac)
Definition: ip6_forward.c:2721
unformat_function_t unformat_pg_ip6_header
Definition: format.h:98
vnet_sw_interface_t * sw_interfaces
Definition: interface.h:830
static void * vlib_frame_vector_args(vlib_frame_t *f)
Get pointer to frame vector data.
Definition: node_funcs.h:244
#define DPO_INVALID
An initialiser for DPOs declared on the stack.
Definition: dpo.h:195
adj_index_t adj_glean_add_or_lock(fib_protocol_t proto, vnet_link_t linkt, u32 sw_if_index, const ip46_address_t *nh_addr)
Glean Adjacency.
Definition: adj_glean.c:50
static void ip6_add_interface_routes(vnet_main_t *vnm, u32 sw_if_index, ip6_main_t *im, u32 fib_index, ip_interface_address_t *a)
Definition: ip6_forward.c:60
clib_error_t * ip_interface_address_add_del(ip_lookup_main_t *lm, u32 sw_if_index, void *addr_fib, u32 address_length, u32 is_del, u32 *result_if_address_index)
Definition: lookup.c:62
A collection of combined counters.
Definition: counter.h:188
u16 ip6_tcp_udp_icmp_compute_checksum(vlib_main_t *vm, vlib_buffer_t *p0, ip6_header_t *ip0, int *bogus_lengthp)
Definition: ip6_forward.c:944
unformat_function_t unformat_memory_size
Definition: format.h:295
static uword ip6_policer_classify(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
Definition: node_funcs.c:810
static vlib_cli_command_t set_ip6_classify_command
(constructor) VLIB_CLI_COMMAND (set_ip6_classify_command)
Definition: ip6_forward.c:3094
ip6_mfib_table_instance_t ip6_mtable
the single MFIB table
Definition: ip6.h:176
u8 *(* trace[256])(u8 *s, ip6_hop_by_hop_option_t *opt)
Definition: ip6.h:605
#define vnet_buffer(b)
Definition: buffer.h:368
u8 * format_unformat_error(u8 *s, va_list *va)
Definition: unformat.c:91
static int ip6_urpf_loose_check(ip6_main_t *im, vlib_buffer_t *b, ip6_header_t *i)
returns number of links on which src is reachable.
Definition: ip6_forward.c:1053
u8 data[0]
Packet data.
Definition: buffer.h:176
static vlib_node_t * vlib_get_node(vlib_main_t *vm, u32 i)
Get vlib node by index.
Definition: node_funcs.h:59
#define HBH_OPTION_TYPE_SKIP_UNKNOWN
adj_index_t adj_nbr_add_or_lock(fib_protocol_t nh_proto, vnet_link_t link_type, const ip46_address_t *nh_addr, u32 sw_if_index)
Neighbour Adjacency sub-type.
Definition: adj_nbr.c:218
void dpo_reset(dpo_id_t *dpo)
reset a DPO ID The DPO will be unlocked.
Definition: dpo.c:231
#define vec_foreach(var, vec)
Vector iterator.
ip_local_next_t
Definition: lookup.h:110
u16 flags
Copy of main node flags.
Definition: node.h:531
u16 dpoi_next_node
The next VLIB node to follow.
Definition: dpo.h:180
static void * ip_interface_address_get_address(ip_lookup_main_t *lm, ip_interface_address_t *a)
Definition: lookup.h:175
int(* options[256])(vlib_buffer_t *b, ip6_header_t *ip, ip6_hop_by_hop_option_t *opt)
Definition: ip6.h:603
clib_error_t * ip6_add_del_interface_address(vlib_main_t *vm, u32 sw_if_index, ip6_address_t *address, u32 address_length, u32 is_del)
Definition: ip6_forward.c:193
#define VLIB_NODE_FLAG_TRACE
Definition: node.h:326
static clib_error_t * ip6_lookup_init(vlib_main_t *vm)
Definition: ip6_forward.c:2627
#define vec_validate_init_empty(V, I, INIT)
Make sure vector is long enough for given index and initialize empty space (no header, unspecified alignment)
Definition: vec.h:488
static uword ip6_lookup(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
Definition: ip6_forward.c:537
#define vnet_rewrite_two_headers(rw0, rw1, p0, p1, most_likely_size)
Definition: rewrite.h:282
#define CLIB_CACHE_LINE_BYTES
Definition: cache.h:59
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:117
vlib_node_registration_t ip6_load_balance_node
(constructor) VLIB_REGISTER_NODE (ip6_load_balance_node)
Definition: ip6_forward.c:777
This adjacency/interface has output features configured.
Definition: rewrite.h:57
IPv6 Forwarding.
vl_api_mac_address_t mac
Definition: gbp.api:118
void vlib_cli_output(vlib_main_t *vm, char *fmt,...)
Definition: cli.c:762
u32 * fib_index_by_sw_if_index
Definition: ip6.h:193
static vlib_buffer_t * vlib_get_buffer(vlib_main_t *vm, u32 buffer_index)
Translate buffer index into buffer pointer.
Definition: buffer_funcs.h:62
#define HBH_OPTION_TYPE_HIGH_ORDER_BITS
Definition: pg.h:308
static u16 ip_csum_fold(ip_csum_t c)
Definition: ip_packet.h:237
static int adj_are_counters_enabled(void)
Get the global configuration option for enabling per-adj counters.
Definition: adj.h:442
uword unformat(unformat_input_t *i, const char *fmt,...)
Definition: unformat.c:972
Definition: defs.h:46
clib_bihash_40_8_t ip6_mhash
Definition: ip6.h:158
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:274
ip6_address_t dst_address
Definition: ip6_packet.h:378
static uword unformat_check_input(unformat_input_t *i)
Definition: format.h:170
uword next_override
Definition: ip6.h:606
ip6_rewrite_next_t
Definition: ip6_forward.c:1580
static_always_inline void vnet_feature_arc_start(u8 arc, u32 sw_if_index, u32 *next0, vlib_buffer_t *b0)
Definition: feature.h:275
static uword pool_elts(void *v)
Number of active elements in a pool.
Definition: pool.h:128