FD.io VPP  v19.08-27-gf4dcae4
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 
53 #ifndef CLIB_MARCH_VARIANT
55 #endif
56 #include <vnet/ip/ip6_forward.h>
57 #include <vnet/interface_output.h>
58 
59 /* Flag used by IOAM code. Classifier sets it pop-hop-by-hop checks it */
60 #define OI_DECAP 0x80000000
61 
62 static void
64  ip6_main_t * im, u32 fib_index,
66 {
67  ip_lookup_main_t *lm = &im->lookup_main;
69  fib_prefix_t pfx = {
70  .fp_len = a->address_length,
71  .fp_proto = FIB_PROTOCOL_IP6,
72  .fp_addr.ip6 = *address,
73  };
74 
75  if (a->address_length < 128)
76  {
78  &pfx,
83  /* No next-hop address */
84  NULL, sw_if_index,
85  /* invalid FIB index */
86  ~0, 1,
87  /* no label stack */
89  }
90 
91  pfx.fp_len = 128;
92  if (sw_if_index < vec_len (lm->classify_table_index_by_sw_if_index))
93  {
96  if (classify_table_index != (u32) ~ 0)
97  {
98  dpo_id_t dpo = DPO_INVALID;
99 
100  dpo_set (&dpo,
101  DPO_CLASSIFY,
103  classify_dpo_create (DPO_PROTO_IP6, classify_table_index));
104 
106  &pfx,
108  FIB_ENTRY_FLAG_NONE, &dpo);
109  dpo_reset (&dpo);
110  }
111  }
112 
113  fib_table_entry_update_one_path (fib_index, &pfx,
118  &pfx.fp_addr,
119  sw_if_index, ~0,
121 }
122 
123 static void
125  u32 fib_index,
126  ip6_address_t * address, u32 address_length)
127 {
128  fib_prefix_t pfx = {
129  .fp_len = address_length,
130  .fp_proto = FIB_PROTOCOL_IP6,
131  .fp_addr.ip6 = *address,
132  };
133 
134  if (pfx.fp_len < 128)
135  {
136  fib_table_entry_delete (fib_index, &pfx, FIB_SOURCE_INTERFACE);
137 
138  }
139 
140  pfx.fp_len = 128;
141  fib_table_entry_delete (fib_index, &pfx, FIB_SOURCE_INTERFACE);
142 }
143 
144 #ifndef CLIB_MARCH_VARIANT
145 void
147 {
148  ip6_main_t *im = &ip6_main;
149 
151 
152  /*
153  * enable/disable only on the 1<->0 transition
154  */
155  if (is_enable)
156  {
157  if (1 != ++im->ip_enabled_by_sw_if_index[sw_if_index])
158  return;
159  }
160  else
161  {
162  /* The ref count is 0 when an address is removed from an interface that has
163  * no address - this is not a ciritical error */
164  if (0 == im->ip_enabled_by_sw_if_index[sw_if_index] ||
165  0 != --im->ip_enabled_by_sw_if_index[sw_if_index])
166  return;
167  }
168 
169  vnet_feature_enable_disable ("ip6-unicast", "ip6-not-enabled", sw_if_index,
170  !is_enable, 0, 0);
171 
172  vnet_feature_enable_disable ("ip6-multicast", "ip6-not-enabled",
173  sw_if_index, !is_enable, 0, 0);
174 }
175 
176 /* get first interface address */
179 {
180  ip_lookup_main_t *lm = &im->lookup_main;
181  ip_interface_address_t *ia = 0;
182  ip6_address_t *result = 0;
183 
184  /* *INDENT-OFF* */
185  foreach_ip_interface_address (lm, ia, sw_if_index,
186  1 /* honor unnumbered */,
187  ({
189  result = a;
190  break;
191  }));
192  /* *INDENT-ON* */
193  return result;
194 }
195 
196 clib_error_t *
200  u32 address_length, u32 is_del)
201 {
202  vnet_main_t *vnm = vnet_get_main ();
203  ip6_main_t *im = &ip6_main;
204  ip_lookup_main_t *lm = &im->lookup_main;
205  clib_error_t *error;
206  u32 if_address_index;
207  ip6_address_fib_t ip6_af, *addr_fib = 0;
208  ip6_address_t ll_addr;
209 
210  /* local0 interface doesn't support IP addressing */
211  if (sw_if_index == 0)
212  {
213  return
214  clib_error_create ("local0 interface doesn't support IP addressing");
215  }
216 
217  if (ip6_address_is_link_local_unicast (address))
218  {
219  if (address_length != 128)
220  {
221  vnm->api_errno = VNET_API_ERROR_ADDRESS_LENGTH_MISMATCH;
222  return
224  ("prefix length of link-local address must be 128");
225  }
226  if (!is_del)
227  {
228  return ip6_neighbor_set_link_local_address (vm, sw_if_index,
229  address);
230  }
231  else
232  {
233  ll_addr = ip6_neighbor_get_link_local_address (sw_if_index);
234  if (ip6_address_is_equal (&ll_addr, address))
235  {
236  vnm->api_errno = VNET_API_ERROR_ADDRESS_NOT_DELETABLE;
237  return clib_error_create ("address not deletable");
238  }
239  else
240  {
241  vnm->api_errno = VNET_API_ERROR_ADDRESS_NOT_FOUND_FOR_INTERFACE;
242  return clib_error_create ("address not found");
243  }
244  }
245  }
246 
247  vec_validate (im->fib_index_by_sw_if_index, sw_if_index);
248  vec_validate (im->mfib_index_by_sw_if_index, sw_if_index);
249 
250  ip6_addr_fib_init (&ip6_af, address,
251  vec_elt (im->fib_index_by_sw_if_index, sw_if_index));
252  vec_add1 (addr_fib, ip6_af);
253 
254  /* *INDENT-OFF* */
255  if (!is_del)
256  {
257  /* When adding an address check that it does not conflict
258  with an existing address on any interface in this table. */
260  vnet_sw_interface_t *sif;
261 
263  ({
264  if (im->fib_index_by_sw_if_index[sw_if_index] ==
265  im->fib_index_by_sw_if_index[sif->sw_if_index])
266  {
267  foreach_ip_interface_address
268  (&im->lookup_main, ia, sif->sw_if_index,
269  0 /* honor unnumbered */ ,
270  ({
271  ip6_address_t * x =
272  ip_interface_address_get_address
273  (&im->lookup_main, ia);
274  if (ip6_destination_matches_route
275  (im, address, x, ia->address_length) ||
276  ip6_destination_matches_route (im,
277  x,
278  address,
279  address_length))
280  {
281  vnm->api_errno = VNET_API_ERROR_DUPLICATE_IF_ADDRESS;
282  return
283  clib_error_create
284  ("failed to add %U which conflicts with %U for interface %U",
285  format_ip6_address_and_length, address,
286  address_length,
287  format_ip6_address_and_length, x,
288  ia->address_length,
289  format_vnet_sw_if_index_name, vnm,
290  sif->sw_if_index);
291  }
292  }));
293  }
294  }));
295  }
296  /* *INDENT-ON* */
297 
298  {
299  uword elts_before = pool_elts (lm->if_address_pool);
300 
302  (lm, sw_if_index, addr_fib, address_length, is_del, &if_address_index);
303  if (error)
304  goto done;
305 
306  /* Pool did not grow: add duplicate address. */
307  if (elts_before == pool_elts (lm->if_address_pool))
308  goto done;
309  }
310 
312 
313  if (is_del)
314  ip6_del_interface_routes (im, ip6_af.fib_index, address, address_length);
315  else
317  im, ip6_af.fib_index,
318  pool_elt_at_index (lm->if_address_pool,
319  if_address_index));
320 
321  {
323  vec_foreach (cb, im->add_del_interface_address_callbacks)
324  cb->function (im, cb->function_opaque, sw_if_index,
325  address, address_length, if_address_index, is_del);
326  }
327 
328 done:
329  vec_free (addr_fib);
330  return error;
331 }
332 
333 #endif
334 
335 static clib_error_t *
337 {
338  ip6_main_t *im = &ip6_main;
340  ip6_address_t *a;
341  u32 is_admin_up, fib_index;
342 
343  /* Fill in lookup tables with default table (0). */
344  vec_validate (im->fib_index_by_sw_if_index, sw_if_index);
345 
347  lookup_main.if_address_pool_index_by_sw_if_index,
348  sw_if_index, ~0);
349 
350  is_admin_up = (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) != 0;
351 
352  fib_index = vec_elt (im->fib_index_by_sw_if_index, sw_if_index);
353 
354  /* *INDENT-OFF* */
355  foreach_ip_interface_address (&im->lookup_main, ia, sw_if_index,
356  0 /* honor unnumbered */,
357  ({
358  a = ip_interface_address_get_address (&im->lookup_main, ia);
359  if (is_admin_up)
360  ip6_add_interface_routes (vnm, sw_if_index,
361  im, fib_index,
362  ia);
363  else
364  ip6_del_interface_routes (im, fib_index,
365  a, ia->address_length);
366  }));
367  /* *INDENT-ON* */
368 
369  return 0;
370 }
371 
373 
374 /* Built-in ip6 unicast rx feature path definition */
375 /* *INDENT-OFF* */
376 VNET_FEATURE_ARC_INIT (ip6_unicast, static) =
377 {
378  .arc_name = "ip6-unicast",
379  .start_nodes = VNET_FEATURES ("ip6-input"),
380  .last_in_arc = "ip6-lookup",
381  .arc_index_ptr = &ip6_main.lookup_main.ucast_feature_arc_index,
382 };
383 
384 VNET_FEATURE_INIT (ip6_flow_classify, static) =
385 {
386  .arc_name = "ip6-unicast",
387  .node_name = "ip6-flow-classify",
388  .runs_before = VNET_FEATURES ("ip6-inacl"),
389 };
390 
391 VNET_FEATURE_INIT (ip6_inacl, static) =
392 {
393  .arc_name = "ip6-unicast",
394  .node_name = "ip6-inacl",
395  .runs_before = VNET_FEATURES ("ip6-policer-classify"),
396 };
397 
398 VNET_FEATURE_INIT (ip6_policer_classify, static) =
399 {
400  .arc_name = "ip6-unicast",
401  .node_name = "ip6-policer-classify",
402  .runs_before = VNET_FEATURES ("ipsec6-input-feature"),
403 };
404 
405 VNET_FEATURE_INIT (ip6_ipsec, static) =
406 {
407  .arc_name = "ip6-unicast",
408  .node_name = "ipsec6-input-feature",
409  .runs_before = VNET_FEATURES ("l2tp-decap"),
410 };
411 
412 VNET_FEATURE_INIT (ip6_l2tp, static) =
413 {
414  .arc_name = "ip6-unicast",
415  .node_name = "l2tp-decap",
416  .runs_before = VNET_FEATURES ("vpath-input-ip6"),
417 };
418 
419 VNET_FEATURE_INIT (ip6_vpath, static) =
420 {
421  .arc_name = "ip6-unicast",
422  .node_name = "vpath-input-ip6",
423  .runs_before = VNET_FEATURES ("ip6-vxlan-bypass"),
424 };
425 
426 VNET_FEATURE_INIT (ip6_vxlan_bypass, static) =
427 {
428  .arc_name = "ip6-unicast",
429  .node_name = "ip6-vxlan-bypass",
430  .runs_before = VNET_FEATURES ("ip6-lookup"),
431 };
432 
433 VNET_FEATURE_INIT (ip6_not_enabled, static) =
434 {
435  .arc_name = "ip6-unicast",
436  .node_name = "ip6-not-enabled",
437  .runs_before = VNET_FEATURES ("ip6-lookup"),
438 };
439 
440 VNET_FEATURE_INIT (ip6_lookup, static) =
441 {
442  .arc_name = "ip6-unicast",
443  .node_name = "ip6-lookup",
444  .runs_before = 0, /*last feature*/
445 };
446 
447 /* Built-in ip6 multicast rx feature path definition (none now) */
448 VNET_FEATURE_ARC_INIT (ip6_multicast, static) =
449 {
450  .arc_name = "ip6-multicast",
451  .start_nodes = VNET_FEATURES ("ip6-input"),
452  .last_in_arc = "ip6-mfib-forward-lookup",
453  .arc_index_ptr = &ip6_main.lookup_main.mcast_feature_arc_index,
454 };
455 
456 VNET_FEATURE_INIT (ip6_vpath_mc, static) = {
457  .arc_name = "ip6-multicast",
458  .node_name = "vpath-input-ip6",
459  .runs_before = VNET_FEATURES ("ip6-mfib-forward-lookup"),
460 };
461 
462 VNET_FEATURE_INIT (ip6_not_enabled_mc, static) = {
463  .arc_name = "ip6-multicast",
464  .node_name = "ip6-not-enabled",
465  .runs_before = VNET_FEATURES ("ip6-mfib-forward-lookup"),
466 };
467 
468 VNET_FEATURE_INIT (ip6_mc_lookup, static) = {
469  .arc_name = "ip6-multicast",
470  .node_name = "ip6-mfib-forward-lookup",
471  .runs_before = 0, /* last feature */
472 };
473 
474 /* Built-in ip4 tx feature path definition */
475 VNET_FEATURE_ARC_INIT (ip6_output, static) =
476 {
477  .arc_name = "ip6-output",
478  .start_nodes = VNET_FEATURES ("ip6-rewrite", "ip6-midchain", "ip6-dvr-dpo"),
479  .last_in_arc = "interface-output",
481 };
482 
483 VNET_FEATURE_INIT (ip6_outacl, static) = {
484  .arc_name = "ip6-output",
485  .node_name = "ip6-outacl",
486  .runs_before = VNET_FEATURES ("ipsec6-output-feature"),
487 };
488 
489 VNET_FEATURE_INIT (ip6_ipsec_output, static) = {
490  .arc_name = "ip6-output",
491  .node_name = "ipsec6-output-feature",
492  .runs_before = VNET_FEATURES ("interface-output"),
493 };
494 
495 VNET_FEATURE_INIT (ip6_interface_output, static) = {
496  .arc_name = "ip6-output",
497  .node_name = "interface-output",
498  .runs_before = 0, /* not before any other features */
499 };
500 /* *INDENT-ON* */
501 
502 static clib_error_t *
504 {
505  ip6_main_t *im = &ip6_main;
506 
507  vec_validate (im->fib_index_by_sw_if_index, sw_if_index);
508  vec_validate (im->mfib_index_by_sw_if_index, sw_if_index);
509 
510  if (!is_add)
511  {
512  /* Ensure that IPv6 is disabled */
513  ip6_main_t *im6 = &ip6_main;
514  ip_lookup_main_t *lm6 = &im6->lookup_main;
515  ip_interface_address_t *ia = 0;
517  vlib_main_t *vm = vlib_get_main ();
518 
519  ip6_neighbor_sw_interface_add_del (vnm, sw_if_index, 0 /* is_add */ );
520  vnet_sw_interface_update_unnumbered (sw_if_index, ~0, 0);
521  /* *INDENT-OFF* */
522  foreach_ip_interface_address (lm6, ia, sw_if_index, 0,
523  ({
524  address = ip_interface_address_get_address (lm6, ia);
525  ip6_add_del_interface_address(vm, sw_if_index, address, ia->address_length, 1);
526  }));
527  /* *INDENT-ON* */
528  ip6_mfib_interface_enable_disable (sw_if_index, 0);
529  }
530 
531  vnet_feature_enable_disable ("ip6-unicast", "ip6-not-enabled", sw_if_index,
532  is_add, 0, 0);
533 
534  vnet_feature_enable_disable ("ip6-multicast", "ip6-not-enabled",
535  sw_if_index, is_add, 0, 0);
536 
537  return /* no error */ 0;
538 }
539 
541 
543  vlib_node_runtime_t * node,
544  vlib_frame_t * frame)
545 {
546  return ip6_lookup_inline (vm, node, frame);
547 }
548 
549 static u8 *format_ip6_lookup_trace (u8 * s, va_list * args);
550 
551 /* *INDENT-OFF* */
553 {
554  .name = "ip6-lookup",
555  .vector_size = sizeof (u32),
556  .format_trace = format_ip6_lookup_trace,
557  .n_next_nodes = IP6_LOOKUP_N_NEXT,
558  .next_nodes = IP6_LOOKUP_NEXT_NODES,
559 };
560 /* *INDENT-ON* */
561 
563  vlib_node_runtime_t * node,
564  vlib_frame_t * frame)
565 {
567  u32 n_left, *from;
568  u32 thread_index = vm->thread_index;
569  ip6_main_t *im = &ip6_main;
570  vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs;
571  u16 nexts[VLIB_FRAME_SIZE], *next;
572 
573  from = vlib_frame_vector_args (frame);
574  n_left = frame->n_vectors;
575  next = nexts;
576 
577  vlib_get_buffers (vm, from, bufs, n_left);
578 
579  while (n_left >= 4)
580  {
581  const load_balance_t *lb0, *lb1;
582  const ip6_header_t *ip0, *ip1;
583  u32 lbi0, hc0, lbi1, hc1;
584  const dpo_id_t *dpo0, *dpo1;
585 
586  /* Prefetch next iteration. */
587  {
588  vlib_prefetch_buffer_header (b[2], STORE);
589  vlib_prefetch_buffer_header (b[3], STORE);
590 
591  CLIB_PREFETCH (b[2]->data, sizeof (ip0[0]), STORE);
592  CLIB_PREFETCH (b[3]->data, sizeof (ip0[0]), STORE);
593  }
594 
595  ip0 = vlib_buffer_get_current (b[0]);
596  ip1 = vlib_buffer_get_current (b[1]);
597  lbi0 = vnet_buffer (b[0])->ip.adj_index[VLIB_TX];
598  lbi1 = vnet_buffer (b[1])->ip.adj_index[VLIB_TX];
599 
600  lb0 = load_balance_get (lbi0);
601  lb1 = load_balance_get (lbi1);
602 
603  /*
604  * this node is for via FIBs we can re-use the hash value from the
605  * to node if present.
606  * We don't want to use the same hash value at each level in the recursion
607  * graph as that would lead to polarisation
608  */
609  hc0 = hc1 = 0;
610 
611  if (PREDICT_FALSE (lb0->lb_n_buckets > 1))
612  {
613  if (PREDICT_TRUE (vnet_buffer (b[0])->ip.flow_hash))
614  {
615  hc0 = vnet_buffer (b[0])->ip.flow_hash =
616  vnet_buffer (b[0])->ip.flow_hash >> 1;
617  }
618  else
619  {
620  hc0 = vnet_buffer (b[0])->ip.flow_hash =
622  }
624  (lb0, (hc0 & (lb0->lb_n_buckets_minus_1)));
625  }
626  else
627  {
628  dpo0 = load_balance_get_bucket_i (lb0, 0);
629  }
630  if (PREDICT_FALSE (lb1->lb_n_buckets > 1))
631  {
632  if (PREDICT_TRUE (vnet_buffer (b[1])->ip.flow_hash))
633  {
634  hc1 = vnet_buffer (b[1])->ip.flow_hash =
635  vnet_buffer (b[1])->ip.flow_hash >> 1;
636  }
637  else
638  {
639  hc1 = vnet_buffer (b[1])->ip.flow_hash =
641  }
643  (lb1, (hc1 & (lb1->lb_n_buckets_minus_1)));
644  }
645  else
646  {
647  dpo1 = load_balance_get_bucket_i (lb1, 0);
648  }
649 
650  next[0] = dpo0->dpoi_next_node;
651  next[1] = dpo1->dpoi_next_node;
652 
653  /* Only process the HBH Option Header if explicitly configured to do so */
654  if (PREDICT_FALSE (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
655  {
656  next[0] = (dpo_is_adj (dpo0) && im->hbh_enabled) ?
658  }
659  /* Only process the HBH Option Header if explicitly configured to do so */
660  if (PREDICT_FALSE (ip1->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
661  {
662  next[1] = (dpo_is_adj (dpo1) && im->hbh_enabled) ?
664  }
665 
666  vnet_buffer (b[0])->ip.adj_index[VLIB_TX] = dpo0->dpoi_index;
667  vnet_buffer (b[1])->ip.adj_index[VLIB_TX] = dpo1->dpoi_index;
668 
670  (cm, thread_index, lbi0, 1, vlib_buffer_length_in_chain (vm, b[0]));
672  (cm, thread_index, lbi1, 1, vlib_buffer_length_in_chain (vm, b[1]));
673 
674  b += 2;
675  next += 2;
676  n_left -= 2;
677  }
678 
679  while (n_left > 0)
680  {
681  const load_balance_t *lb0;
682  const ip6_header_t *ip0;
683  const dpo_id_t *dpo0;
684  u32 lbi0, hc0;
685 
686  ip0 = vlib_buffer_get_current (b[0]);
687  lbi0 = vnet_buffer (b[0])->ip.adj_index[VLIB_TX];
688 
689  lb0 = load_balance_get (lbi0);
690 
691  hc0 = 0;
692  if (PREDICT_FALSE (lb0->lb_n_buckets > 1))
693  {
694  if (PREDICT_TRUE (vnet_buffer (b[0])->ip.flow_hash))
695  {
696  hc0 = vnet_buffer (b[0])->ip.flow_hash =
697  vnet_buffer (b[0])->ip.flow_hash >> 1;
698  }
699  else
700  {
701  hc0 = vnet_buffer (b[0])->ip.flow_hash =
703  }
705  (lb0, (hc0 & (lb0->lb_n_buckets_minus_1)));
706  }
707  else
708  {
709  dpo0 = load_balance_get_bucket_i (lb0, 0);
710  }
711 
712  next[0] = dpo0->dpoi_next_node;
713  vnet_buffer (b[0])->ip.adj_index[VLIB_TX] = dpo0->dpoi_index;
714 
715  /* Only process the HBH Option Header if explicitly configured to do so */
716  if (PREDICT_FALSE (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
717  {
718  next[0] = (dpo_is_adj (dpo0) && im->hbh_enabled) ?
720  }
721 
723  (cm, thread_index, lbi0, 1, vlib_buffer_length_in_chain (vm, b[0]));
724 
725  b += 1;
726  next += 1;
727  n_left -= 1;
728  }
729 
730  vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors);
731 
732  if (node->flags & VLIB_NODE_FLAG_TRACE)
733  ip6_forward_next_trace (vm, node, frame, VLIB_TX);
734 
735  return frame->n_vectors;
736 }
737 
738 /* *INDENT-OFF* */
740 {
741  .name = "ip6-load-balance",
742  .vector_size = sizeof (u32),
743  .sibling_of = "ip6-lookup",
744  .format_trace = format_ip6_lookup_trace,
745 };
746 /* *INDENT-ON* */
747 
748 typedef struct
749 {
750  /* Adjacency taken. */
754 
755  /* Packet data, possibly *after* rewrite. */
756  u8 packet_data[128 - 1 * sizeof (u32)];
757 }
759 
760 #ifndef CLIB_MARCH_VARIANT
761 u8 *
762 format_ip6_forward_next_trace (u8 * s, va_list * args)
763 {
764  CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
765  CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
766  ip6_forward_next_trace_t *t = va_arg (*args, ip6_forward_next_trace_t *);
767  u32 indent = format_get_indent (s);
768 
769  s = format (s, "%U%U",
770  format_white_space, indent,
771  format_ip6_header, t->packet_data, sizeof (t->packet_data));
772  return s;
773 }
774 #endif
775 
776 static u8 *
777 format_ip6_lookup_trace (u8 * s, va_list * args)
778 {
779  CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
780  CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
781  ip6_forward_next_trace_t *t = va_arg (*args, ip6_forward_next_trace_t *);
782  u32 indent = format_get_indent (s);
783 
784  s = format (s, "fib %d dpo-idx %d flow hash: 0x%08x",
785  t->fib_index, t->adj_index, t->flow_hash);
786  s = format (s, "\n%U%U",
787  format_white_space, indent,
788  format_ip6_header, t->packet_data, sizeof (t->packet_data));
789  return s;
790 }
791 
792 
793 static u8 *
794 format_ip6_rewrite_trace (u8 * s, va_list * args)
795 {
796  CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
797  CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
798  ip6_forward_next_trace_t *t = va_arg (*args, ip6_forward_next_trace_t *);
799  u32 indent = format_get_indent (s);
800 
801  s = format (s, "tx_sw_if_index %d adj-idx %d : %U flow hash: 0x%08x",
804  s = format (s, "\n%U%U",
805  format_white_space, indent,
807  t->adj_index, t->packet_data, sizeof (t->packet_data));
808  return s;
809 }
810 
811 /* Common trace function for all ip6-forward next nodes. */
812 #ifndef CLIB_MARCH_VARIANT
813 void
815  vlib_node_runtime_t * node,
816  vlib_frame_t * frame, vlib_rx_or_tx_t which_adj_index)
817 {
818  u32 *from, n_left;
819  ip6_main_t *im = &ip6_main;
820 
821  n_left = frame->n_vectors;
822  from = vlib_frame_vector_args (frame);
823 
824  while (n_left >= 4)
825  {
826  u32 bi0, bi1;
827  vlib_buffer_t *b0, *b1;
828  ip6_forward_next_trace_t *t0, *t1;
829 
830  /* Prefetch next iteration. */
831  vlib_prefetch_buffer_with_index (vm, from[2], LOAD);
832  vlib_prefetch_buffer_with_index (vm, from[3], LOAD);
833 
834  bi0 = from[0];
835  bi1 = from[1];
836 
837  b0 = vlib_get_buffer (vm, bi0);
838  b1 = vlib_get_buffer (vm, bi1);
839 
840  if (b0->flags & VLIB_BUFFER_IS_TRACED)
841  {
842  t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
843  t0->adj_index = vnet_buffer (b0)->ip.adj_index[which_adj_index];
844  t0->flow_hash = vnet_buffer (b0)->ip.flow_hash;
845  t0->fib_index =
846  (vnet_buffer (b0)->sw_if_index[VLIB_TX] !=
847  (u32) ~ 0) ? vnet_buffer (b0)->sw_if_index[VLIB_TX] :
850 
853  sizeof (t0->packet_data));
854  }
855  if (b1->flags & VLIB_BUFFER_IS_TRACED)
856  {
857  t1 = vlib_add_trace (vm, node, b1, sizeof (t1[0]));
858  t1->adj_index = vnet_buffer (b1)->ip.adj_index[which_adj_index];
859  t1->flow_hash = vnet_buffer (b1)->ip.flow_hash;
860  t1->fib_index =
861  (vnet_buffer (b1)->sw_if_index[VLIB_TX] !=
862  (u32) ~ 0) ? vnet_buffer (b1)->sw_if_index[VLIB_TX] :
865 
868  sizeof (t1->packet_data));
869  }
870  from += 2;
871  n_left -= 2;
872  }
873 
874  while (n_left >= 1)
875  {
876  u32 bi0;
877  vlib_buffer_t *b0;
878  ip6_forward_next_trace_t *t0;
879 
880  bi0 = from[0];
881 
882  b0 = vlib_get_buffer (vm, bi0);
883 
884  if (b0->flags & VLIB_BUFFER_IS_TRACED)
885  {
886  t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
887  t0->adj_index = vnet_buffer (b0)->ip.adj_index[which_adj_index];
888  t0->flow_hash = vnet_buffer (b0)->ip.flow_hash;
889  t0->fib_index =
890  (vnet_buffer (b0)->sw_if_index[VLIB_TX] !=
891  (u32) ~ 0) ? vnet_buffer (b0)->sw_if_index[VLIB_TX] :
894 
897  sizeof (t0->packet_data));
898  }
899  from += 1;
900  n_left -= 1;
901  }
902 }
903 
904 /* Compute TCP/UDP/ICMP6 checksum in software. */
905 u16
907  ip6_header_t * ip0, int *bogus_lengthp)
908 {
909  ip_csum_t sum0;
910  u16 sum16, payload_length_host_byte_order;
911  u32 i, n_this_buffer, n_bytes_left;
912  u32 headers_size = sizeof (ip0[0]);
913  u8 *data_this_buffer;
914  u8 length_odd;
915 
916  ASSERT (bogus_lengthp);
917  *bogus_lengthp = 0;
918 
919  /* Initialize checksum with ip header. */
920  sum0 = ip0->payload_length + clib_host_to_net_u16 (ip0->protocol);
921  payload_length_host_byte_order = clib_net_to_host_u16 (ip0->payload_length);
922  data_this_buffer = (u8 *) (ip0 + 1);
923 
924  for (i = 0; i < ARRAY_LEN (ip0->src_address.as_uword); i++)
925  {
926  sum0 = ip_csum_with_carry (sum0,
927  clib_mem_unaligned (&ip0->
928  src_address.as_uword[i],
929  uword));
930  sum0 =
931  ip_csum_with_carry (sum0,
933  uword));
934  }
935 
936  /* some icmp packets may come with a "router alert" hop-by-hop extension header (e.g., mldv2 packets)
937  * or UDP-Ping packets */
938  if (PREDICT_FALSE (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
939  {
940  u32 skip_bytes;
941  ip6_hop_by_hop_ext_t *ext_hdr =
942  (ip6_hop_by_hop_ext_t *) data_this_buffer;
943 
944  /* validate really icmp6 next */
945  ASSERT ((ext_hdr->next_hdr == IP_PROTOCOL_ICMP6)
946  || (ext_hdr->next_hdr == IP_PROTOCOL_UDP));
947 
948  skip_bytes = 8 * (1 + ext_hdr->n_data_u64s);
949  data_this_buffer = (void *) ((u8 *) data_this_buffer + skip_bytes);
950 
951  payload_length_host_byte_order -= skip_bytes;
952  headers_size += skip_bytes;
953  }
954 
955  n_bytes_left = n_this_buffer = payload_length_host_byte_order;
956 
957  if (p0)
958  {
959  u32 n_ip_bytes_this_buffer =
960  p0->current_length - (((u8 *) ip0 - p0->data) - p0->current_data);
961  if (n_this_buffer + headers_size > n_ip_bytes_this_buffer)
962  {
963  n_this_buffer = p0->current_length > headers_size ?
964  n_ip_bytes_this_buffer - headers_size : 0;
965  }
966  }
967 
968  while (1)
969  {
970  sum0 = ip_incremental_checksum (sum0, data_this_buffer, n_this_buffer);
971  n_bytes_left -= n_this_buffer;
972  if (n_bytes_left == 0)
973  break;
974 
975  ASSERT (p0->flags & VLIB_BUFFER_NEXT_PRESENT);
976  if (!(p0->flags & VLIB_BUFFER_NEXT_PRESENT))
977  {
978  *bogus_lengthp = 1;
979  return 0xfefe;
980  }
981 
982  length_odd = (n_this_buffer & 1);
983 
984  p0 = vlib_get_buffer (vm, p0->next_buffer);
985  data_this_buffer = vlib_buffer_get_current (p0);
986  n_this_buffer = clib_min (p0->current_length, n_bytes_left);
987 
988  if (PREDICT_FALSE (length_odd))
989  {
990  /* Prepend a 0 or the resulting checksum will be incorrect. */
991  data_this_buffer--;
992  n_this_buffer++;
993  n_bytes_left++;
994  data_this_buffer[0] = 0;
995  }
996  }
997 
998  sum16 = ~ip_csum_fold (sum0);
999 
1000  return sum16;
1001 }
1002 
1003 u32
1005 {
1007  udp_header_t *udp0;
1008  u16 sum16;
1009  int bogus_length;
1010 
1011  /* some icmp packets may come with a "router alert" hop-by-hop extension header (e.g., mldv2 packets) */
1012  ASSERT (ip0->protocol == IP_PROTOCOL_TCP
1013  || ip0->protocol == IP_PROTOCOL_ICMP6
1014  || ip0->protocol == IP_PROTOCOL_UDP
1015  || ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS);
1016 
1017  udp0 = (void *) (ip0 + 1);
1018  if (ip0->protocol == IP_PROTOCOL_UDP && udp0->checksum == 0)
1019  {
1020  p0->flags |= (VNET_BUFFER_F_L4_CHECKSUM_COMPUTED
1021  | VNET_BUFFER_F_L4_CHECKSUM_CORRECT);
1022  return p0->flags;
1023  }
1024 
1025  sum16 = ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip0, &bogus_length);
1026 
1027  p0->flags |= (VNET_BUFFER_F_L4_CHECKSUM_COMPUTED
1028  | ((sum16 == 0) << VNET_BUFFER_F_LOG2_L4_CHECKSUM_CORRECT));
1029 
1030  return p0->flags;
1031 }
1032 #endif
1033 
1034 /**
1035  * @brief returns number of links on which src is reachable.
1036  */
1037 always_inline int
1039 {
1040  const load_balance_t *lb0;
1041  index_t lbi;
1042  u32 fib_index;
1043 
1044  fib_index = vec_elt (im->fib_index_by_sw_if_index,
1046  fib_index =
1047  (vnet_buffer (b)->sw_if_index[VLIB_TX] == (u32) ~ 0) ?
1048  fib_index : vnet_buffer (b)->sw_if_index[VLIB_TX];
1049 
1050  lbi = ip6_fib_table_fwding_lookup (im, fib_index, &i->src_address);
1051  lb0 = load_balance_get (lbi);
1052 
1053  return (fib_urpf_check_size (lb0->lb_urpf));
1054 }
1055 
1058  u32 * udp_offset0)
1059 {
1060  u32 proto0;
1061  proto0 = ip6_locate_header (p0, ip0, IP_PROTOCOL_UDP, udp_offset0);
1062  if (proto0 != IP_PROTOCOL_UDP)
1063  {
1064  proto0 = ip6_locate_header (p0, ip0, IP_PROTOCOL_TCP, udp_offset0);
1065  proto0 = (proto0 == IP_PROTOCOL_TCP) ? proto0 : 0;
1066  }
1067  return proto0;
1068 }
1069 
1070 /* *INDENT-OFF* */
1071 VNET_FEATURE_ARC_INIT (ip6_local) =
1072 {
1073  .arc_name = "ip6-local",
1074  .start_nodes = VNET_FEATURES ("ip6-local"),
1075 };
1076 /* *INDENT-ON* */
1077 
1080  vlib_frame_t * frame, int head_of_feature_arc)
1081 {
1082  ip6_main_t *im = &ip6_main;
1083  ip_lookup_main_t *lm = &im->lookup_main;
1084  u32 *from, n_left_from;
1085  vlib_node_runtime_t *error_node =
1087  u8 arc_index = vnet_feat_arc_ip6_local.feature_arc_index;
1088  vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
1089  u16 nexts[VLIB_FRAME_SIZE], *next;
1090 
1091  from = vlib_frame_vector_args (frame);
1092  n_left_from = frame->n_vectors;
1093 
1094  if (node->flags & VLIB_NODE_FLAG_TRACE)
1095  ip6_forward_next_trace (vm, node, frame, VLIB_TX);
1096 
1097  vlib_get_buffers (vm, from, bufs, n_left_from);
1098  b = bufs;
1099  next = nexts;
1100 
1101  while (n_left_from > 2)
1102  {
1103  /* Prefetch next iteration. */
1104  if (n_left_from >= 6)
1105  {
1106  vlib_prefetch_buffer_header (b[4], STORE);
1107  vlib_prefetch_buffer_header (b[5], STORE);
1108  vlib_prefetch_buffer_data (b[2], LOAD);
1109  vlib_prefetch_buffer_data (b[3], LOAD);
1110  }
1111 
1112  u8 error[2];
1113  error[0] = IP6_ERROR_UNKNOWN_PROTOCOL;
1114  error[1] = IP6_ERROR_UNKNOWN_PROTOCOL;
1115 
1116  ip6_header_t *ip[2];
1117  ip[0] = vlib_buffer_get_current (b[0]);
1118  ip[1] = vlib_buffer_get_current (b[1]);
1119 
1120  if (head_of_feature_arc)
1121  {
1122  vnet_buffer (b[0])->l3_hdr_offset = b[0]->current_data;
1123  vnet_buffer (b[1])->l3_hdr_offset = b[1]->current_data;
1124 
1125  u8 type[2];
1126  type[0] = lm->builtin_protocol_by_ip_protocol[ip[0]->protocol];
1127  type[1] = lm->builtin_protocol_by_ip_protocol[ip[1]->protocol];
1128 
1129  u32 flags[2];
1130  flags[0] = b[0]->flags;
1131  flags[1] = b[1]->flags;
1132 
1133  u32 good_l4_csum[2];
1134  good_l4_csum[0] =
1135  flags[0] & (VNET_BUFFER_F_L4_CHECKSUM_CORRECT |
1136  VNET_BUFFER_F_OFFLOAD_TCP_CKSUM |
1137  VNET_BUFFER_F_OFFLOAD_UDP_CKSUM);
1138  good_l4_csum[1] =
1139  flags[1] & (VNET_BUFFER_F_L4_CHECKSUM_CORRECT |
1140  VNET_BUFFER_F_OFFLOAD_TCP_CKSUM |
1141  VNET_BUFFER_F_OFFLOAD_UDP_CKSUM);
1142 
1143  u32 udp_offset[2] = { };
1144  u8 is_tcp_udp[2];
1145  is_tcp_udp[0] =
1146  ip6_next_proto_is_tcp_udp (b[0], ip[0], &udp_offset[0]);
1147  is_tcp_udp[1] =
1148  ip6_next_proto_is_tcp_udp (b[1], ip[1], &udp_offset[1]);
1149  i16 len_diff[2] = { 0 };
1150  if (PREDICT_TRUE (is_tcp_udp[0]))
1151  {
1152  udp_header_t *udp =
1153  (udp_header_t *) ((u8 *) ip[0] + udp_offset[0]);
1154  good_l4_csum[0] |= type[0] == IP_BUILTIN_PROTOCOL_UDP
1155  && udp->checksum == 0;
1156  /* optimistically verify UDP length. */
1157  u16 ip_len, udp_len;
1158  ip_len = clib_net_to_host_u16 (ip[0]->payload_length);
1159  udp_len = clib_net_to_host_u16 (udp->length);
1160  len_diff[0] = ip_len - udp_len;
1161  }
1162  if (PREDICT_TRUE (is_tcp_udp[1]))
1163  {
1164  udp_header_t *udp =
1165  (udp_header_t *) ((u8 *) ip[1] + udp_offset[1]);
1166  good_l4_csum[1] |= type[1] == IP_BUILTIN_PROTOCOL_UDP
1167  && udp->checksum == 0;
1168  /* optimistically verify UDP length. */
1169  u16 ip_len, udp_len;
1170  ip_len = clib_net_to_host_u16 (ip[1]->payload_length);
1171  udp_len = clib_net_to_host_u16 (udp->length);
1172  len_diff[1] = ip_len - udp_len;
1173  }
1174 
1175  good_l4_csum[0] |= type[0] == IP_BUILTIN_PROTOCOL_UNKNOWN;
1176  good_l4_csum[1] |= type[1] == IP_BUILTIN_PROTOCOL_UNKNOWN;
1177 
1178  len_diff[0] = type[0] == IP_BUILTIN_PROTOCOL_UDP ? len_diff[0] : 0;
1179  len_diff[1] = type[1] == IP_BUILTIN_PROTOCOL_UDP ? len_diff[1] : 0;
1180 
1181  u8 need_csum[2];
1182  need_csum[0] = type[0] != IP_BUILTIN_PROTOCOL_UNKNOWN
1183  && !good_l4_csum[0]
1184  && !(flags[0] & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED);
1185  need_csum[1] = type[1] != IP_BUILTIN_PROTOCOL_UNKNOWN
1186  && !good_l4_csum[1]
1187  && !(flags[1] & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED);
1188  if (PREDICT_FALSE (need_csum[0]))
1189  {
1190  flags[0] = ip6_tcp_udp_icmp_validate_checksum (vm, b[0]);
1191  good_l4_csum[0] = flags[0] & VNET_BUFFER_F_L4_CHECKSUM_CORRECT;
1192  }
1193  if (PREDICT_FALSE (need_csum[1]))
1194  {
1195  flags[1] = ip6_tcp_udp_icmp_validate_checksum (vm, b[1]);
1196  good_l4_csum[1] = flags[1] & VNET_BUFFER_F_L4_CHECKSUM_CORRECT;
1197  }
1198 
1199  error[0] = IP6_ERROR_UNKNOWN_PROTOCOL;
1200  error[0] = len_diff[0] < 0 ? IP6_ERROR_UDP_LENGTH : error[0];
1201  error[1] = IP6_ERROR_UNKNOWN_PROTOCOL;
1202  error[1] = len_diff[1] < 0 ? IP6_ERROR_UDP_LENGTH : error[1];
1203 
1204  STATIC_ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_UDP ==
1205  IP6_ERROR_UDP_CHECKSUM,
1206  "Wrong IP6 errors constants");
1207  STATIC_ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_ICMP ==
1208  IP6_ERROR_ICMP_CHECKSUM,
1209  "Wrong IP6 errors constants");
1210 
1211  error[0] =
1212  !good_l4_csum[0] ? IP6_ERROR_UDP_CHECKSUM + type[0] : error[0];
1213  error[1] =
1214  !good_l4_csum[1] ? IP6_ERROR_UDP_CHECKSUM + type[1] : error[1];
1215 
1216  /* Drop packets from unroutable hosts. */
1217  /* If this is a neighbor solicitation (ICMP), skip source RPF check */
1218  u8 unroutable[2];
1219  unroutable[0] = error[0] == IP6_ERROR_UNKNOWN_PROTOCOL
1220  && type[0] != IP_BUILTIN_PROTOCOL_ICMP
1222  unroutable[1] = error[1] == IP6_ERROR_UNKNOWN_PROTOCOL
1223  && type[1] != IP_BUILTIN_PROTOCOL_ICMP
1225  if (PREDICT_FALSE (unroutable[0]))
1226  {
1227  error[0] =
1228  !ip6_urpf_loose_check (im, b[0],
1229  ip[0]) ? IP6_ERROR_SRC_LOOKUP_MISS
1230  : error[0];
1231  }
1232  if (PREDICT_FALSE (unroutable[1]))
1233  {
1234  error[1] =
1235  !ip6_urpf_loose_check (im, b[1],
1236  ip[1]) ? IP6_ERROR_SRC_LOOKUP_MISS
1237  : error[1];
1238  }
1239 
1240  vnet_buffer (b[0])->ip.fib_index =
1241  vnet_buffer (b[0])->sw_if_index[VLIB_TX] != ~0 ?
1242  vnet_buffer (b[0])->sw_if_index[VLIB_TX] :
1243  vnet_buffer (b[0])->ip.fib_index;
1244  vnet_buffer (b[1])->ip.fib_index =
1245  vnet_buffer (b[1])->sw_if_index[VLIB_TX] != ~0 ?
1246  vnet_buffer (b[1])->sw_if_index[VLIB_TX] :
1247  vnet_buffer (b[1])->ip.fib_index;
1248  } /* head_of_feature_arc */
1249 
1250  next[0] = lm->local_next_by_ip_protocol[ip[0]->protocol];
1251  next[0] =
1252  error[0] != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next[0];
1253  next[1] = lm->local_next_by_ip_protocol[ip[1]->protocol];
1254  next[1] =
1255  error[1] != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next[1];
1256 
1257  b[0]->error = error_node->errors[0];
1258  b[1]->error = error_node->errors[1];
1259 
1260  if (head_of_feature_arc)
1261  {
1262  u8 ip6_unknown[2];
1263  ip6_unknown[0] = error[0] == (u8) IP6_ERROR_UNKNOWN_PROTOCOL;
1264  ip6_unknown[1] = error[1] == (u8) IP6_ERROR_UNKNOWN_PROTOCOL;
1265  if (PREDICT_TRUE (ip6_unknown[0]))
1266  {
1267  u32 next32 = next[0];
1268  vnet_feature_arc_start (arc_index,
1269  vnet_buffer (b[0])->sw_if_index
1270  [VLIB_RX], &next32, b[0]);
1271  next[0] = next32;
1272  }
1273  if (PREDICT_TRUE (ip6_unknown[1]))
1274  {
1275  u32 next32 = next[1];
1276  vnet_feature_arc_start (arc_index,
1277  vnet_buffer (b[1])->sw_if_index
1278  [VLIB_RX], &next32, b[1]);
1279  next[1] = next32;
1280  }
1281  }
1282 
1283  /* next */
1284  b += 2;
1285  next += 2;
1286  n_left_from -= 2;
1287  }
1288 
1289  while (n_left_from)
1290  {
1291  u8 error;
1292  error = IP6_ERROR_UNKNOWN_PROTOCOL;
1293 
1294  ip6_header_t *ip;
1295  ip = vlib_buffer_get_current (b[0]);
1296 
1297  if (head_of_feature_arc)
1298  {
1299  vnet_buffer (b[0])->l3_hdr_offset = b[0]->current_data;
1301 
1302  u32 flags = b[0]->flags;
1303  u32 good_l4_csum =
1304  flags & (VNET_BUFFER_F_L4_CHECKSUM_CORRECT |
1305  VNET_BUFFER_F_OFFLOAD_TCP_CKSUM |
1306  VNET_BUFFER_F_OFFLOAD_UDP_CKSUM);
1307 
1308  u32 udp_offset;
1309  i16 len_diff = 0;
1310  u8 is_tcp_udp = ip6_next_proto_is_tcp_udp (b[0], ip, &udp_offset);
1311  if (PREDICT_TRUE (is_tcp_udp))
1312  {
1313  udp_header_t *udp = (udp_header_t *) ((u8 *) ip + udp_offset);
1314  /* Don't verify UDP checksum for packets with explicit zero checksum. */
1315  good_l4_csum |= type == IP_BUILTIN_PROTOCOL_UDP
1316  && udp->checksum == 0;
1317  /* optimistically verify UDP length. */
1318  u16 ip_len, udp_len;
1319  ip_len = clib_net_to_host_u16 (ip->payload_length);
1320  udp_len = clib_net_to_host_u16 (udp->length);
1321  len_diff = ip_len - udp_len;
1322  }
1323 
1324  good_l4_csum |= type == IP_BUILTIN_PROTOCOL_UNKNOWN;
1325  len_diff = type == IP_BUILTIN_PROTOCOL_UDP ? len_diff : 0;
1326 
1327  u8 need_csum = type != IP_BUILTIN_PROTOCOL_UNKNOWN && !good_l4_csum
1328  && !(flags & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED);
1329  if (PREDICT_FALSE (need_csum))
1330  {
1331  flags = ip6_tcp_udp_icmp_validate_checksum (vm, b[0]);
1332  good_l4_csum = flags & VNET_BUFFER_F_L4_CHECKSUM_CORRECT;
1333  }
1334 
1335  error = IP6_ERROR_UNKNOWN_PROTOCOL;
1336  error = len_diff < 0 ? IP6_ERROR_UDP_LENGTH : error;
1337 
1338  STATIC_ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_UDP ==
1339  IP6_ERROR_UDP_CHECKSUM,
1340  "Wrong IP6 errors constants");
1341  STATIC_ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_ICMP ==
1342  IP6_ERROR_ICMP_CHECKSUM,
1343  "Wrong IP6 errors constants");
1344 
1345  error = !good_l4_csum ? IP6_ERROR_UDP_CHECKSUM + type : error;
1346 
1347  /* Drop packets from unroutable hosts. */
1348  /* If this is a neighbor solicitation (ICMP), skip source RPF check */
1349  u8 unroutable = error == IP6_ERROR_UNKNOWN_PROTOCOL
1350  && type != IP_BUILTIN_PROTOCOL_ICMP
1352  if (PREDICT_FALSE (unroutable))
1353  {
1354  error =
1355  !ip6_urpf_loose_check (im, b[0],
1356  ip) ? IP6_ERROR_SRC_LOOKUP_MISS :
1357  error;
1358  }
1359 
1360  vnet_buffer (b[0])->ip.fib_index =
1361  vnet_buffer (b[0])->sw_if_index[VLIB_TX] != ~0 ?
1362  vnet_buffer (b[0])->sw_if_index[VLIB_TX] :
1363  vnet_buffer (b[0])->ip.fib_index;
1364  } /* head_of_feature_arc */
1365 
1366  next[0] = lm->local_next_by_ip_protocol[ip->protocol];
1367  next[0] =
1368  error != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next[0];
1369 
1370  b[0]->error = error_node->errors[0];
1371 
1372  if (head_of_feature_arc)
1373  {
1374  if (PREDICT_TRUE (error == (u8) IP6_ERROR_UNKNOWN_PROTOCOL))
1375  {
1376  u32 next32 = next[0];
1377  vnet_feature_arc_start (arc_index,
1378  vnet_buffer (b[0])->sw_if_index
1379  [VLIB_RX], &next32, b[0]);
1380  next[0] = next32;
1381  }
1382  }
1383 
1384  /* next */
1385  b += 1;
1386  next += 1;
1387  n_left_from -= 1;
1388  }
1389 
1390  vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors);
1391  return frame->n_vectors;
1392 }
1393 
1395  vlib_frame_t * frame)
1396 {
1397  return ip6_local_inline (vm, node, frame, 1 /* head of feature arc */ );
1398 }
1399 
1400 /* *INDENT-OFF* */
1402 {
1403  .name = "ip6-local",
1404  .vector_size = sizeof (u32),
1405  .format_trace = format_ip6_forward_next_trace,
1406  .n_next_nodes = IP_LOCAL_N_NEXT,
1407  .next_nodes =
1408  {
1409  [IP_LOCAL_NEXT_DROP] = "ip6-drop",
1410  [IP_LOCAL_NEXT_PUNT] = "ip6-punt",
1411  [IP_LOCAL_NEXT_UDP_LOOKUP] = "ip6-udp-lookup",
1412  [IP_LOCAL_NEXT_ICMP] = "ip6-icmp-input",
1413  [IP_LOCAL_NEXT_REASSEMBLY] = "ip6-reassembly",
1414  },
1415 };
1416 /* *INDENT-ON* */
1417 
1419  vlib_node_runtime_t * node,
1420  vlib_frame_t * frame)
1421 {
1422  return ip6_local_inline (vm, node, frame, 0 /* head of feature arc */ );
1423 }
1424 
1425 /* *INDENT-OFF* */
1427  .name = "ip6-local-end-of-arc",
1428  .vector_size = sizeof (u32),
1429 
1430  .format_trace = format_ip6_forward_next_trace,
1431  .sibling_of = "ip6-local",
1432 };
1433 
1434 VNET_FEATURE_INIT (ip6_local_end_of_arc, static) = {
1435  .arc_name = "ip6-local",
1436  .node_name = "ip6-local-end-of-arc",
1437  .runs_before = 0, /* not before any other features */
1438 };
1439 /* *INDENT-ON* */
1440 
1441 #ifdef CLIB_MARCH_VARIANT
1443 
1444 #else
1445 
1446 void
1448 {
1449  vlib_main_t *vm = vlib_get_main ();
1450  ip6_main_t *im = &ip6_main;
1451  ip_lookup_main_t *lm = &im->lookup_main;
1452 
1453  ASSERT (protocol < ARRAY_LEN (lm->local_next_by_ip_protocol));
1455  vlib_node_add_next (vm, ip6_local_node.index, node_index);
1456 }
1457 
1458 void
1460 {
1461  ip6_main_t *im = &ip6_main;
1462  ip_lookup_main_t *lm = &im->lookup_main;
1463 
1464  ASSERT (protocol < ARRAY_LEN (lm->local_next_by_ip_protocol));
1466 }
1467 
1468 clib_error_t *
1470  u8 refresh)
1471 {
1472  vnet_main_t *vnm = vnet_get_main ();
1473  ip6_main_t *im = &ip6_main;
1474  icmp6_neighbor_solicitation_header_t *h;
1475  ip6_address_t *src;
1477  ip_adjacency_t *adj;
1479  vnet_sw_interface_t *si;
1480  vlib_buffer_t *b;
1481  adj_index_t ai;
1482  u32 bi = 0;
1483  int bogus_length;
1484 
1485  si = vnet_get_sw_interface (vnm, sw_if_index);
1486 
1488  {
1489  return clib_error_return (0, "%U: interface %U down",
1490  format_ip6_address, dst,
1492  sw_if_index);
1493  }
1494 
1495  src =
1496  ip6_interface_address_matching_destination (im, dst, sw_if_index, &ia);
1497  if (!src)
1498  {
1499  vnm->api_errno = VNET_API_ERROR_NO_MATCHING_INTERFACE;
1500  return clib_error_return
1501  (0, "no matching interface address for destination %U (interface %U)",
1502  format_ip6_address, dst,
1503  format_vnet_sw_if_index_name, vnm, sw_if_index);
1504  }
1505 
1506  h =
1509  &bi);
1510  if (!h)
1511  return clib_error_return (0, "ICMP6 NS packet allocation failed");
1512 
1513  hi = vnet_get_sup_hw_interface (vnm, sw_if_index);
1514 
1515  /* Destination address is a solicited node multicast address. We need to fill in
1516  the low 24 bits with low 24 bits of target's address. */
1517  h->ip.dst_address.as_u8[13] = dst->as_u8[13];
1518  h->ip.dst_address.as_u8[14] = dst->as_u8[14];
1519  h->ip.dst_address.as_u8[15] = dst->as_u8[15];
1520 
1521  h->ip.src_address = src[0];
1522  h->neighbor.target_address = dst[0];
1523 
1524  if (PREDICT_FALSE (!hi->hw_address))
1525  {
1526  return clib_error_return (0, "%U: interface %U do not support ip probe",
1527  format_ip6_address, dst,
1529  sw_if_index);
1530  }
1531 
1532  clib_memcpy_fast (h->link_layer_option.ethernet_address, hi->hw_address,
1533  vec_len (hi->hw_address));
1534 
1535  h->neighbor.icmp.checksum =
1536  ip6_tcp_udp_icmp_compute_checksum (vm, 0, &h->ip, &bogus_length);
1537  ASSERT (bogus_length == 0);
1538 
1539  b = vlib_get_buffer (vm, bi);
1540  vnet_buffer (b)->sw_if_index[VLIB_RX] =
1541  vnet_buffer (b)->sw_if_index[VLIB_TX] = sw_if_index;
1542 
1543  /* Add encapsulation string for software interface (e.g. ethernet header). */
1544  ip46_address_t nh = {
1545  .ip6 = *dst,
1546  };
1547 
1549  VNET_LINK_IP6, &nh, sw_if_index);
1550  adj = adj_get (ai);
1551 
1552  /* Peer has been previously resolved, retrieve glean adj instead */
1553  if (adj->lookup_next_index == IP_LOOKUP_NEXT_REWRITE && refresh == 0)
1554  {
1555  adj_unlock (ai);
1557  VNET_LINK_IP6, sw_if_index, &nh);
1558  adj = adj_get (ai);
1559  }
1560 
1561  vnet_rewrite_one_header (adj[0], h, sizeof (ethernet_header_t));
1562  vlib_buffer_advance (b, -adj->rewrite_header.data_bytes);
1563 
1564  {
1566  u32 *to_next = vlib_frame_vector_args (f);
1567  to_next[0] = bi;
1568  f->n_vectors = 1;
1570  }
1571 
1572  adj_unlock (ai);
1573  return /* no error */ 0;
1574 }
1575 #endif
1576 
1577 typedef enum
1578 {
1584 
1585 /**
1586  * This bits of an IPv6 address to mask to construct a multicast
1587  * MAC address
1588  */
1589 #define IP6_MCAST_ADDR_MASK 0xffffffff
1590 
1591 always_inline void
1592 ip6_mtu_check (vlib_buffer_t * b, u16 packet_bytes,
1593  u16 adj_packet_bytes, bool is_locally_generated,
1594  u32 * next, u32 * error)
1595 {
1596  if (adj_packet_bytes >= 1280 && packet_bytes > adj_packet_bytes)
1597  {
1598  if (is_locally_generated)
1599  {
1600  /* IP fragmentation */
1601  ip_frag_set_vnet_buffer (b, adj_packet_bytes,
1603  *next = IP6_REWRITE_NEXT_FRAGMENT;
1604  *error = IP6_ERROR_MTU_EXCEEDED;
1605  }
1606  else
1607  {
1608  *error = IP6_ERROR_MTU_EXCEEDED;
1609  icmp6_error_set_vnet_buffer (b, ICMP6_packet_too_big, 0,
1610  adj_packet_bytes);
1612  }
1613  }
1614 }
1615 
1618  vlib_node_runtime_t * node,
1619  vlib_frame_t * frame,
1620  int do_counters, int is_midchain, int is_mcast,
1621  int do_gso)
1622 {
1624  u32 *from = vlib_frame_vector_args (frame);
1625  u32 n_left_from, n_left_to_next, *to_next, next_index;
1626  vlib_node_runtime_t *error_node =
1628 
1629  n_left_from = frame->n_vectors;
1630  next_index = node->cached_next_index;
1631  u32 thread_index = vm->thread_index;
1632 
1633  while (n_left_from > 0)
1634  {
1635  vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1636 
1637  while (n_left_from >= 4 && n_left_to_next >= 2)
1638  {
1639  ip_adjacency_t *adj0, *adj1;
1640  vlib_buffer_t *p0, *p1;
1641  ip6_header_t *ip0, *ip1;
1642  u32 pi0, rw_len0, next0, error0, adj_index0;
1643  u32 pi1, rw_len1, next1, error1, adj_index1;
1644  u32 tx_sw_if_index0, tx_sw_if_index1;
1645  bool is_locally_originated0, is_locally_originated1;
1646 
1647  /* Prefetch next iteration. */
1648  {
1649  vlib_buffer_t *p2, *p3;
1650 
1651  p2 = vlib_get_buffer (vm, from[2]);
1652  p3 = vlib_get_buffer (vm, from[3]);
1653 
1654  vlib_prefetch_buffer_header (p2, LOAD);
1655  vlib_prefetch_buffer_header (p3, LOAD);
1656 
1657  CLIB_PREFETCH (p2->pre_data, 32, STORE);
1658  CLIB_PREFETCH (p3->pre_data, 32, STORE);
1659 
1660  CLIB_PREFETCH (p2->data, sizeof (ip0[0]), STORE);
1661  CLIB_PREFETCH (p3->data, sizeof (ip0[0]), STORE);
1662  }
1663 
1664  pi0 = to_next[0] = from[0];
1665  pi1 = to_next[1] = from[1];
1666 
1667  from += 2;
1668  n_left_from -= 2;
1669  to_next += 2;
1670  n_left_to_next -= 2;
1671 
1672  p0 = vlib_get_buffer (vm, pi0);
1673  p1 = vlib_get_buffer (vm, pi1);
1674 
1675  adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
1676  adj_index1 = vnet_buffer (p1)->ip.adj_index[VLIB_TX];
1677 
1678  ip0 = vlib_buffer_get_current (p0);
1679  ip1 = vlib_buffer_get_current (p1);
1680 
1681  error0 = error1 = IP6_ERROR_NONE;
1682  next0 = next1 = IP6_REWRITE_NEXT_DROP;
1683 
1684  is_locally_originated0 =
1685  p0->flags & VNET_BUFFER_F_LOCALLY_ORIGINATED;
1686  if (PREDICT_TRUE (!is_locally_originated0))
1687  {
1688  i32 hop_limit0 = ip0->hop_limit;
1689 
1690  /* Input node should have reject packets with hop limit 0. */
1691  ASSERT (ip0->hop_limit > 0);
1692 
1693  hop_limit0 -= 1;
1694 
1695  ip0->hop_limit = hop_limit0;
1696 
1697  /*
1698  * If the hop count drops below 1 when forwarding, generate
1699  * an ICMP response.
1700  */
1701  if (PREDICT_FALSE (hop_limit0 <= 0))
1702  {
1703  error0 = IP6_ERROR_TIME_EXPIRED;
1705  vnet_buffer (p0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
1706  icmp6_error_set_vnet_buffer (p0, ICMP6_time_exceeded,
1707  ICMP6_time_exceeded_ttl_exceeded_in_transit,
1708  0);
1709  }
1710  }
1711  else
1712  {
1713  p0->flags &= ~VNET_BUFFER_F_LOCALLY_ORIGINATED;
1714  }
1715  is_locally_originated1 =
1716  p1->flags & VNET_BUFFER_F_LOCALLY_ORIGINATED;
1717  if (PREDICT_TRUE (!is_locally_originated1))
1718  {
1719  i32 hop_limit1 = ip1->hop_limit;
1720 
1721  /* Input node should have reject packets with hop limit 0. */
1722  ASSERT (ip1->hop_limit > 0);
1723 
1724  hop_limit1 -= 1;
1725 
1726  ip1->hop_limit = hop_limit1;
1727 
1728  /*
1729  * If the hop count drops below 1 when forwarding, generate
1730  * an ICMP response.
1731  */
1732  if (PREDICT_FALSE (hop_limit1 <= 0))
1733  {
1734  error1 = IP6_ERROR_TIME_EXPIRED;
1736  vnet_buffer (p1)->sw_if_index[VLIB_TX] = (u32) ~ 0;
1737  icmp6_error_set_vnet_buffer (p1, ICMP6_time_exceeded,
1738  ICMP6_time_exceeded_ttl_exceeded_in_transit,
1739  0);
1740  }
1741  }
1742  else
1743  {
1744  p1->flags &= ~VNET_BUFFER_F_LOCALLY_ORIGINATED;
1745  }
1746  adj0 = adj_get (adj_index0);
1747  adj1 = adj_get (adj_index1);
1748 
1749  rw_len0 = adj0[0].rewrite_header.data_bytes;
1750  rw_len1 = adj1[0].rewrite_header.data_bytes;
1751  vnet_buffer (p0)->ip.save_rewrite_length = rw_len0;
1752  vnet_buffer (p1)->ip.save_rewrite_length = rw_len1;
1753 
1754  if (do_counters)
1755  {
1758  thread_index, adj_index0, 1,
1759  vlib_buffer_length_in_chain (vm, p0) + rw_len0);
1762  thread_index, adj_index1, 1,
1763  vlib_buffer_length_in_chain (vm, p1) + rw_len1);
1764  }
1765 
1766  /* Check MTU of outgoing interface. */
1767  u16 ip0_len =
1768  clib_net_to_host_u16 (ip0->payload_length) +
1769  sizeof (ip6_header_t);
1770  u16 ip1_len =
1771  clib_net_to_host_u16 (ip1->payload_length) +
1772  sizeof (ip6_header_t);
1773  if (do_gso && (p0->flags & VNET_BUFFER_F_GSO))
1774  ip0_len = gso_mtu_sz (p0);
1775  if (do_gso && (p1->flags & VNET_BUFFER_F_GSO))
1776  ip1_len = gso_mtu_sz (p1);
1777 
1778 
1779 
1780  ip6_mtu_check (p0, ip0_len,
1781  adj0[0].rewrite_header.max_l3_packet_bytes,
1782  is_locally_originated0, &next0, &error0);
1783  ip6_mtu_check (p1, ip1_len,
1784  adj1[0].rewrite_header.max_l3_packet_bytes,
1785  is_locally_originated1, &next1, &error1);
1786 
1787  /* Don't adjust the buffer for hop count issue; icmp-error node
1788  * wants to see the IP header */
1789  if (PREDICT_TRUE (error0 == IP6_ERROR_NONE))
1790  {
1791  p0->current_data -= rw_len0;
1792  p0->current_length += rw_len0;
1793 
1794  tx_sw_if_index0 = adj0[0].rewrite_header.sw_if_index;
1795  vnet_buffer (p0)->sw_if_index[VLIB_TX] = tx_sw_if_index0;
1796  next0 = adj0[0].rewrite_header.next_index;
1797 
1798  if (PREDICT_FALSE
1799  (adj0[0].rewrite_header.flags & VNET_REWRITE_HAS_FEATURES))
1801  tx_sw_if_index0, &next0, p0);
1802  }
1803  else
1804  {
1805  p0->error = error_node->errors[error0];
1806  }
1807  if (PREDICT_TRUE (error1 == IP6_ERROR_NONE))
1808  {
1809  p1->current_data -= rw_len1;
1810  p1->current_length += rw_len1;
1811 
1812  tx_sw_if_index1 = adj1[0].rewrite_header.sw_if_index;
1813  vnet_buffer (p1)->sw_if_index[VLIB_TX] = tx_sw_if_index1;
1814  next1 = adj1[0].rewrite_header.next_index;
1815 
1816  if (PREDICT_FALSE
1817  (adj1[0].rewrite_header.flags & VNET_REWRITE_HAS_FEATURES))
1819  tx_sw_if_index1, &next1, p1);
1820  }
1821  else
1822  {
1823  p1->error = error_node->errors[error1];
1824  }
1825 
1826  if (is_midchain)
1827  {
1828  /* before we paint on the next header, update the L4
1829  * checksums if required, since there's no offload on a tunnel */
1830  calc_checksums (vm, p0);
1831  calc_checksums (vm, p1);
1832  }
1833 
1834  /* Guess we are only writing on simple Ethernet header. */
1835  vnet_rewrite_two_headers (adj0[0], adj1[0],
1836  ip0, ip1, sizeof (ethernet_header_t));
1837 
1838  if (is_midchain)
1839  {
1840  if (adj0->sub_type.midchain.fixup_func)
1841  adj0->sub_type.midchain.fixup_func
1842  (vm, adj0, p0, adj0->sub_type.midchain.fixup_data);
1843  if (adj1->sub_type.midchain.fixup_func)
1844  adj1->sub_type.midchain.fixup_func
1845  (vm, adj1, p1, adj1->sub_type.midchain.fixup_data);
1846  }
1847  if (is_mcast)
1848  {
1849  /*
1850  * copy bytes from the IP address into the MAC rewrite
1851  */
1853  adj0->
1854  rewrite_header.dst_mcast_offset,
1855  &ip0->dst_address.as_u32[3],
1856  (u8 *) ip0);
1858  adj1->
1859  rewrite_header.dst_mcast_offset,
1860  &ip1->dst_address.as_u32[3],
1861  (u8 *) ip1);
1862  }
1863 
1864  vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
1865  to_next, n_left_to_next,
1866  pi0, pi1, next0, next1);
1867  }
1868 
1869  while (n_left_from > 0 && n_left_to_next > 0)
1870  {
1871  ip_adjacency_t *adj0;
1872  vlib_buffer_t *p0;
1873  ip6_header_t *ip0;
1874  u32 pi0, rw_len0;
1875  u32 adj_index0, next0, error0;
1876  u32 tx_sw_if_index0;
1877  bool is_locally_originated0;
1878 
1879  pi0 = to_next[0] = from[0];
1880 
1881  p0 = vlib_get_buffer (vm, pi0);
1882 
1883  adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
1884 
1885  adj0 = adj_get (adj_index0);
1886 
1887  ip0 = vlib_buffer_get_current (p0);
1888 
1889  error0 = IP6_ERROR_NONE;
1890  next0 = IP6_REWRITE_NEXT_DROP;
1891 
1892  /* Check hop limit */
1893  is_locally_originated0 =
1894  p0->flags & VNET_BUFFER_F_LOCALLY_ORIGINATED;
1895  if (PREDICT_TRUE (!is_locally_originated0))
1896  {
1897  i32 hop_limit0 = ip0->hop_limit;
1898 
1899  ASSERT (ip0->hop_limit > 0);
1900 
1901  hop_limit0 -= 1;
1902 
1903  ip0->hop_limit = hop_limit0;
1904 
1905  if (PREDICT_FALSE (hop_limit0 <= 0))
1906  {
1907  /*
1908  * If the hop count drops below 1 when forwarding, generate
1909  * an ICMP response.
1910  */
1911  error0 = IP6_ERROR_TIME_EXPIRED;
1913  vnet_buffer (p0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
1914  icmp6_error_set_vnet_buffer (p0, ICMP6_time_exceeded,
1915  ICMP6_time_exceeded_ttl_exceeded_in_transit,
1916  0);
1917  }
1918  }
1919  else
1920  {
1921  p0->flags &= ~VNET_BUFFER_F_LOCALLY_ORIGINATED;
1922  }
1923 
1924  if (is_midchain)
1925  {
1926  calc_checksums (vm, p0);
1927  }
1928 
1929  /* Guess we are only writing on simple Ethernet header. */
1930  vnet_rewrite_one_header (adj0[0], ip0, sizeof (ethernet_header_t));
1931 
1932  /* Update packet buffer attributes/set output interface. */
1933  rw_len0 = adj0[0].rewrite_header.data_bytes;
1934  vnet_buffer (p0)->ip.save_rewrite_length = rw_len0;
1935 
1936  if (do_counters)
1937  {
1940  thread_index, adj_index0, 1,
1941  vlib_buffer_length_in_chain (vm, p0) + rw_len0);
1942  }
1943 
1944  /* Check MTU of outgoing interface. */
1945  u16 ip0_len =
1946  clib_net_to_host_u16 (ip0->payload_length) +
1947  sizeof (ip6_header_t);
1948  if (do_gso && (p0->flags & VNET_BUFFER_F_GSO))
1949  ip0_len = gso_mtu_sz (p0);
1950 
1951  ip6_mtu_check (p0, ip0_len,
1952  adj0[0].rewrite_header.max_l3_packet_bytes,
1953  is_locally_originated0, &next0, &error0);
1954 
1955  /* Don't adjust the buffer for hop count issue; icmp-error node
1956  * wants to see the IP header */
1957  if (PREDICT_TRUE (error0 == IP6_ERROR_NONE))
1958  {
1959  p0->current_data -= rw_len0;
1960  p0->current_length += rw_len0;
1961 
1962  tx_sw_if_index0 = adj0[0].rewrite_header.sw_if_index;
1963 
1964  vnet_buffer (p0)->sw_if_index[VLIB_TX] = tx_sw_if_index0;
1965  next0 = adj0[0].rewrite_header.next_index;
1966 
1967  if (PREDICT_FALSE
1968  (adj0[0].rewrite_header.flags & VNET_REWRITE_HAS_FEATURES))
1970  tx_sw_if_index0, &next0, p0);
1971  }
1972  else
1973  {
1974  p0->error = error_node->errors[error0];
1975  }
1976 
1977  if (is_midchain)
1978  {
1979  if (adj0->sub_type.midchain.fixup_func)
1980  adj0->sub_type.midchain.fixup_func
1981  (vm, adj0, p0, adj0->sub_type.midchain.fixup_data);
1982  }
1983  if (is_mcast)
1984  {
1986  adj0->
1987  rewrite_header.dst_mcast_offset,
1988  &ip0->dst_address.as_u32[3],
1989  (u8 *) ip0);
1990  }
1991 
1992  from += 1;
1993  n_left_from -= 1;
1994  to_next += 1;
1995  n_left_to_next -= 1;
1996 
1997  vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1998  to_next, n_left_to_next,
1999  pi0, next0);
2000  }
2001 
2002  vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2003  }
2004 
2005  /* Need to do trace after rewrites to pick up new packet data. */
2006  if (node->flags & VLIB_NODE_FLAG_TRACE)
2007  ip6_forward_next_trace (vm, node, frame, VLIB_TX);
2008 
2009  return frame->n_vectors;
2010 }
2011 
2014  vlib_node_runtime_t * node,
2015  vlib_frame_t * frame,
2016  int do_counters, int is_midchain, int is_mcast)
2017 {
2018  vnet_main_t *vnm = vnet_get_main ();
2020  return ip6_rewrite_inline_with_gso (vm, node, frame, do_counters,
2021  is_midchain, is_mcast,
2022  1 /* do_gso */ );
2023  else
2024  return ip6_rewrite_inline_with_gso (vm, node, frame, do_counters,
2025  is_midchain, is_mcast,
2026  0 /* no do_gso */ );
2027 }
2028 
2030  vlib_node_runtime_t * node,
2031  vlib_frame_t * frame)
2032 {
2033  if (adj_are_counters_enabled ())
2034  return ip6_rewrite_inline (vm, node, frame, 1, 0, 0);
2035  else
2036  return ip6_rewrite_inline (vm, node, frame, 0, 0, 0);
2037 }
2038 
2040  vlib_node_runtime_t * node,
2041  vlib_frame_t * frame)
2042 {
2043  if (adj_are_counters_enabled ())
2044  return ip6_rewrite_inline (vm, node, frame, 1, 0, 0);
2045  else
2046  return ip6_rewrite_inline (vm, node, frame, 0, 0, 0);
2047 }
2048 
2050  vlib_node_runtime_t * node,
2051  vlib_frame_t * frame)
2052 {
2053  if (adj_are_counters_enabled ())
2054  return ip6_rewrite_inline (vm, node, frame, 1, 0, 1);
2055  else
2056  return ip6_rewrite_inline (vm, node, frame, 0, 0, 1);
2057 }
2058 
2060  vlib_node_runtime_t * node,
2061  vlib_frame_t * frame)
2062 {
2063  if (adj_are_counters_enabled ())
2064  return ip6_rewrite_inline (vm, node, frame, 1, 1, 0);
2065  else
2066  return ip6_rewrite_inline (vm, node, frame, 0, 1, 0);
2067 }
2068 
2070  vlib_node_runtime_t * node,
2071  vlib_frame_t * frame)
2072 {
2073  if (adj_are_counters_enabled ())
2074  return ip6_rewrite_inline (vm, node, frame, 1, 1, 1);
2075  else
2076  return ip6_rewrite_inline (vm, node, frame, 0, 1, 1);
2077 }
2078 
2079 /* *INDENT-OFF* */
2081 {
2082  .name = "ip6-midchain",
2083  .vector_size = sizeof (u32),
2084  .format_trace = format_ip6_forward_next_trace,
2085  .sibling_of = "ip6-rewrite",
2086  };
2087 
2089 {
2090  .name = "ip6-rewrite",
2091  .vector_size = sizeof (u32),
2092  .format_trace = format_ip6_rewrite_trace,
2093  .n_next_nodes = IP6_REWRITE_N_NEXT,
2094  .next_nodes =
2095  {
2096  [IP6_REWRITE_NEXT_DROP] = "ip6-drop",
2097  [IP6_REWRITE_NEXT_ICMP_ERROR] = "ip6-icmp-error",
2098  [IP6_REWRITE_NEXT_FRAGMENT] = "ip6-frag",
2099  },
2100 };
2101 
2103  .name = "ip6-rewrite-bcast",
2104  .vector_size = sizeof (u32),
2105 
2106  .format_trace = format_ip6_rewrite_trace,
2107  .sibling_of = "ip6-rewrite",
2108 };
2109 
2111 {
2112  .name = "ip6-rewrite-mcast",
2113  .vector_size = sizeof (u32),
2114  .format_trace = format_ip6_rewrite_trace,
2115  .sibling_of = "ip6-rewrite",
2116 };
2117 
2118 
2120 {
2121  .name = "ip6-mcast-midchain",
2122  .vector_size = sizeof (u32),
2123  .format_trace = format_ip6_rewrite_trace,
2124  .sibling_of = "ip6-rewrite",
2125 };
2126 
2127 /* *INDENT-ON* */
2128 
2129 /*
2130  * Hop-by-Hop handling
2131  */
2132 #ifndef CLIB_MARCH_VARIANT
2134 #endif /* CLIB_MARCH_VARIANT */
2135 
2136 #define foreach_ip6_hop_by_hop_error \
2137 _(PROCESSED, "pkts with ip6 hop-by-hop options") \
2138 _(FORMAT, "incorrectly formatted hop-by-hop options") \
2139 _(UNKNOWN_OPTION, "unknown ip6 hop-by-hop options")
2140 
2141 /* *INDENT-OFF* */
2142 typedef enum
2143 {
2144 #define _(sym,str) IP6_HOP_BY_HOP_ERROR_##sym,
2146 #undef _
2149 /* *INDENT-ON* */
2150 
2151 /*
2152  * Primary h-b-h handler trace support
2153  * We work pretty hard on the problem for obvious reasons
2154  */
2155 typedef struct
2156 {
2159  u8 option_data[256];
2161 
2163 
2165 #define _(sym,string) string,
2167 #undef _
2168 };
2169 
2170 #ifndef CLIB_MARCH_VARIANT
2171 u8 *
2172 format_ip6_hop_by_hop_ext_hdr (u8 * s, va_list * args)
2173 {
2174  ip6_hop_by_hop_header_t *hbh0 = va_arg (*args, ip6_hop_by_hop_header_t *);
2175  int total_len = va_arg (*args, int);
2176  ip6_hop_by_hop_option_t *opt0, *limit0;
2178  u8 type0;
2179 
2180  s = format (s, "IP6_HOP_BY_HOP: next protocol %d len %d total %d",
2181  hbh0->protocol, (hbh0->length + 1) << 3, total_len);
2182 
2183  opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2184  limit0 = (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 + total_len);
2185 
2186  while (opt0 < limit0)
2187  {
2188  type0 = opt0->type;
2189  switch (type0)
2190  {
2191  case 0: /* Pad, just stop */
2192  opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0 + 1);
2193  break;
2194 
2195  default:
2196  if (hm->trace[type0])
2197  {
2198  s = (*hm->trace[type0]) (s, opt0);
2199  }
2200  else
2201  {
2202  s =
2203  format (s, "\n unrecognized option %d length %d", type0,
2204  opt0->length);
2205  }
2206  opt0 =
2207  (ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length +
2208  sizeof (ip6_hop_by_hop_option_t));
2209  break;
2210  }
2211  }
2212  return s;
2213 }
2214 #endif
2215 
2216 static u8 *
2217 format_ip6_hop_by_hop_trace (u8 * s, va_list * args)
2218 {
2219  CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
2220  CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
2221  ip6_hop_by_hop_trace_t *t = va_arg (*args, ip6_hop_by_hop_trace_t *);
2223  ip6_hop_by_hop_option_t *opt0, *limit0;
2225 
2226  u8 type0;
2227 
2228  hbh0 = (ip6_hop_by_hop_header_t *) t->option_data;
2229 
2230  s = format (s, "IP6_HOP_BY_HOP: next index %d len %d traced %d",
2231  t->next_index, (hbh0->length + 1) << 3, t->trace_len);
2232 
2233  opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2234  limit0 = (ip6_hop_by_hop_option_t *) ((u8 *) hbh0) + t->trace_len;
2235 
2236  while (opt0 < limit0)
2237  {
2238  type0 = opt0->type;
2239  switch (type0)
2240  {
2241  case 0: /* Pad, just stop */
2242  opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0) + 1;
2243  break;
2244 
2245  default:
2246  if (hm->trace[type0])
2247  {
2248  s = (*hm->trace[type0]) (s, opt0);
2249  }
2250  else
2251  {
2252  s =
2253  format (s, "\n unrecognized option %d length %d", type0,
2254  opt0->length);
2255  }
2256  opt0 =
2257  (ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length +
2258  sizeof (ip6_hop_by_hop_option_t));
2259  break;
2260  }
2261  }
2262  return s;
2263 }
2264 
2267  ip6_header_t * ip0,
2268  ip6_hop_by_hop_header_t * hbh0,
2269  ip6_hop_by_hop_option_t * opt0,
2270  ip6_hop_by_hop_option_t * limit0, u32 * next0)
2271 {
2273  u8 type0;
2274  u8 error0 = 0;
2275 
2276  while (opt0 < limit0)
2277  {
2278  type0 = opt0->type;
2279  switch (type0)
2280  {
2281  case 0: /* Pad1 */
2282  opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0) + 1;
2283  continue;
2284  case 1: /* PadN */
2285  break;
2286  default:
2287  if (hm->options[type0])
2288  {
2289  if ((*hm->options[type0]) (b0, ip0, opt0) < 0)
2290  {
2291  error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2292  return (error0);
2293  }
2294  }
2295  else
2296  {
2297  /* Unrecognized mandatory option, check the two high order bits */
2298  switch (opt0->type & HBH_OPTION_TYPE_HIGH_ORDER_BITS)
2299  {
2301  break;
2303  error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2304  *next0 = IP_LOOKUP_NEXT_DROP;
2305  break;
2307  error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2308  *next0 = IP_LOOKUP_NEXT_ICMP_ERROR;
2309  icmp6_error_set_vnet_buffer (b0, ICMP6_parameter_problem,
2310  ICMP6_parameter_problem_unrecognized_option,
2311  (u8 *) opt0 - (u8 *) ip0);
2312  break;
2314  error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2316  {
2317  *next0 = IP_LOOKUP_NEXT_ICMP_ERROR;
2319  ICMP6_parameter_problem,
2320  ICMP6_parameter_problem_unrecognized_option,
2321  (u8 *) opt0 - (u8 *) ip0);
2322  }
2323  else
2324  {
2325  *next0 = IP_LOOKUP_NEXT_DROP;
2326  }
2327  break;
2328  }
2329  return (error0);
2330  }
2331  }
2332  opt0 =
2333  (ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length +
2334  sizeof (ip6_hop_by_hop_option_t));
2335  }
2336  return (error0);
2337 }
2338 
2339 /*
2340  * Process the Hop-by-Hop Options header
2341  */
2342 VLIB_NODE_FN (ip6_hop_by_hop_node) (vlib_main_t * vm,
2343  vlib_node_runtime_t * node,
2344  vlib_frame_t * frame)
2345 {
2346  vlib_node_runtime_t *error_node =
2347  vlib_node_get_runtime (vm, ip6_hop_by_hop_node.index);
2349  u32 n_left_from, *from, *to_next;
2350  ip_lookup_next_t next_index;
2351 
2352  from = vlib_frame_vector_args (frame);
2353  n_left_from = frame->n_vectors;
2354  next_index = node->cached_next_index;
2355 
2356  while (n_left_from > 0)
2357  {
2358  u32 n_left_to_next;
2359 
2360  vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
2361 
2362  while (n_left_from >= 4 && n_left_to_next >= 2)
2363  {
2364  u32 bi0, bi1;
2365  vlib_buffer_t *b0, *b1;
2366  u32 next0, next1;
2367  ip6_header_t *ip0, *ip1;
2368  ip6_hop_by_hop_header_t *hbh0, *hbh1;
2369  ip6_hop_by_hop_option_t *opt0, *limit0, *opt1, *limit1;
2370  u8 error0 = 0, error1 = 0;
2371 
2372  /* Prefetch next iteration. */
2373  {
2374  vlib_buffer_t *p2, *p3;
2375 
2376  p2 = vlib_get_buffer (vm, from[2]);
2377  p3 = vlib_get_buffer (vm, from[3]);
2378 
2379  vlib_prefetch_buffer_header (p2, LOAD);
2380  vlib_prefetch_buffer_header (p3, LOAD);
2381 
2382  CLIB_PREFETCH (p2->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
2383  CLIB_PREFETCH (p3->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
2384  }
2385 
2386  /* Speculatively enqueue b0, b1 to the current next frame */
2387  to_next[0] = bi0 = from[0];
2388  to_next[1] = bi1 = from[1];
2389  from += 2;
2390  to_next += 2;
2391  n_left_from -= 2;
2392  n_left_to_next -= 2;
2393 
2394  b0 = vlib_get_buffer (vm, bi0);
2395  b1 = vlib_get_buffer (vm, bi1);
2396 
2397  /* Default use the next_index from the adjacency. A HBH option rarely redirects to a different node */
2398  u32 adj_index0 = vnet_buffer (b0)->ip.adj_index[VLIB_TX];
2399  ip_adjacency_t *adj0 = adj_get (adj_index0);
2400  u32 adj_index1 = vnet_buffer (b1)->ip.adj_index[VLIB_TX];
2401  ip_adjacency_t *adj1 = adj_get (adj_index1);
2402 
2403  /* Default use the next_index from the adjacency. A HBH option rarely redirects to a different node */
2404  next0 = adj0->lookup_next_index;
2405  next1 = adj1->lookup_next_index;
2406 
2407  ip0 = vlib_buffer_get_current (b0);
2408  ip1 = vlib_buffer_get_current (b1);
2409  hbh0 = (ip6_hop_by_hop_header_t *) (ip0 + 1);
2410  hbh1 = (ip6_hop_by_hop_header_t *) (ip1 + 1);
2411  opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2412  opt1 = (ip6_hop_by_hop_option_t *) (hbh1 + 1);
2413  limit0 =
2414  (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 +
2415  ((hbh0->length + 1) << 3));
2416  limit1 =
2417  (ip6_hop_by_hop_option_t *) ((u8 *) hbh1 +
2418  ((hbh1->length + 1) << 3));
2419 
2420  /*
2421  * Basic validity checks
2422  */
2423  if ((hbh0->length + 1) << 3 >
2424  clib_net_to_host_u16 (ip0->payload_length))
2425  {
2426  error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2427  next0 = IP_LOOKUP_NEXT_DROP;
2428  goto outdual;
2429  }
2430  /* Scan the set of h-b-h options, process ones that we understand */
2431  error0 = ip6_scan_hbh_options (b0, ip0, hbh0, opt0, limit0, &next0);
2432 
2433  if ((hbh1->length + 1) << 3 >
2434  clib_net_to_host_u16 (ip1->payload_length))
2435  {
2436  error1 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2437  next1 = IP_LOOKUP_NEXT_DROP;
2438  goto outdual;
2439  }
2440  /* Scan the set of h-b-h options, process ones that we understand */
2441  error1 = ip6_scan_hbh_options (b1, ip1, hbh1, opt1, limit1, &next1);
2442 
2443  outdual:
2444  /* Has the classifier flagged this buffer for special treatment? */
2445  if (PREDICT_FALSE
2446  ((error0 == 0)
2447  && (vnet_buffer (b0)->l2_classify.opaque_index & OI_DECAP)))
2448  next0 = hm->next_override;
2449 
2450  /* Has the classifier flagged this buffer for special treatment? */
2451  if (PREDICT_FALSE
2452  ((error1 == 0)
2453  && (vnet_buffer (b1)->l2_classify.opaque_index & OI_DECAP)))
2454  next1 = hm->next_override;
2455 
2456  if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)))
2457  {
2458  if (b0->flags & VLIB_BUFFER_IS_TRACED)
2459  {
2461  vlib_add_trace (vm, node, b0, sizeof (*t));
2462  u32 trace_len = (hbh0->length + 1) << 3;
2463  t->next_index = next0;
2464  /* Capture the h-b-h option verbatim */
2465  trace_len =
2466  trace_len <
2467  ARRAY_LEN (t->option_data) ? trace_len :
2468  ARRAY_LEN (t->option_data);
2469  t->trace_len = trace_len;
2470  clib_memcpy_fast (t->option_data, hbh0, trace_len);
2471  }
2472  if (b1->flags & VLIB_BUFFER_IS_TRACED)
2473  {
2475  vlib_add_trace (vm, node, b1, sizeof (*t));
2476  u32 trace_len = (hbh1->length + 1) << 3;
2477  t->next_index = next1;
2478  /* Capture the h-b-h option verbatim */
2479  trace_len =
2480  trace_len <
2481  ARRAY_LEN (t->option_data) ? trace_len :
2482  ARRAY_LEN (t->option_data);
2483  t->trace_len = trace_len;
2484  clib_memcpy_fast (t->option_data, hbh1, trace_len);
2485  }
2486 
2487  }
2488 
2489  b0->error = error_node->errors[error0];
2490  b1->error = error_node->errors[error1];
2491 
2492  /* verify speculative enqueue, maybe switch current next frame */
2493  vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
2494  n_left_to_next, bi0, bi1, next0,
2495  next1);
2496  }
2497 
2498  while (n_left_from > 0 && n_left_to_next > 0)
2499  {
2500  u32 bi0;
2501  vlib_buffer_t *b0;
2502  u32 next0;
2503  ip6_header_t *ip0;
2505  ip6_hop_by_hop_option_t *opt0, *limit0;
2506  u8 error0 = 0;
2507 
2508  /* Speculatively enqueue b0 to the current next frame */
2509  bi0 = from[0];
2510  to_next[0] = bi0;
2511  from += 1;
2512  to_next += 1;
2513  n_left_from -= 1;
2514  n_left_to_next -= 1;
2515 
2516  b0 = vlib_get_buffer (vm, bi0);
2517  /*
2518  * Default use the next_index from the adjacency.
2519  * A HBH option rarely redirects to a different node
2520  */
2521  u32 adj_index0 = vnet_buffer (b0)->ip.adj_index[VLIB_TX];
2522  ip_adjacency_t *adj0 = adj_get (adj_index0);
2523  next0 = adj0->lookup_next_index;
2524 
2525  ip0 = vlib_buffer_get_current (b0);
2526  hbh0 = (ip6_hop_by_hop_header_t *) (ip0 + 1);
2527  opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2528  limit0 =
2529  (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 +
2530  ((hbh0->length + 1) << 3));
2531 
2532  /*
2533  * Basic validity checks
2534  */
2535  if ((hbh0->length + 1) << 3 >
2536  clib_net_to_host_u16 (ip0->payload_length))
2537  {
2538  error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2539  next0 = IP_LOOKUP_NEXT_DROP;
2540  goto out0;
2541  }
2542 
2543  /* Scan the set of h-b-h options, process ones that we understand */
2544  error0 = ip6_scan_hbh_options (b0, ip0, hbh0, opt0, limit0, &next0);
2545 
2546  out0:
2547  /* Has the classifier flagged this buffer for special treatment? */
2548  if (PREDICT_FALSE
2549  ((error0 == 0)
2550  && (vnet_buffer (b0)->l2_classify.opaque_index & OI_DECAP)))
2551  next0 = hm->next_override;
2552 
2553  if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
2554  {
2556  vlib_add_trace (vm, node, b0, sizeof (*t));
2557  u32 trace_len = (hbh0->length + 1) << 3;
2558  t->next_index = next0;
2559  /* Capture the h-b-h option verbatim */
2560  trace_len =
2561  trace_len <
2562  ARRAY_LEN (t->option_data) ? trace_len :
2563  ARRAY_LEN (t->option_data);
2564  t->trace_len = trace_len;
2565  clib_memcpy_fast (t->option_data, hbh0, trace_len);
2566  }
2567 
2568  b0->error = error_node->errors[error0];
2569 
2570  /* verify speculative enqueue, maybe switch current next frame */
2571  vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
2572  n_left_to_next, bi0, next0);
2573  }
2574  vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2575  }
2576  return frame->n_vectors;
2577 }
2578 
2579 /* *INDENT-OFF* */
2580 VLIB_REGISTER_NODE (ip6_hop_by_hop_node) =
2581 {
2582  .name = "ip6-hop-by-hop",
2583  .sibling_of = "ip6-lookup",
2584  .vector_size = sizeof (u32),
2585  .format_trace = format_ip6_hop_by_hop_trace,
2587  .n_errors = ARRAY_LEN (ip6_hop_by_hop_error_strings),
2588  .error_strings = ip6_hop_by_hop_error_strings,
2589  .n_next_nodes = 0,
2590 };
2591 /* *INDENT-ON* */
2592 
2593 static clib_error_t *
2595 {
2597  clib_memset (hm->options, 0, sizeof (hm->options));
2598  clib_memset (hm->trace, 0, sizeof (hm->trace));
2600  return (0);
2601 }
2602 
2604 
2605 #ifndef CLIB_MARCH_VARIANT
2606 void
2608 {
2610 
2611  hm->next_override = next;
2612 }
2613 
2614 int
2616  int options (vlib_buffer_t * b, ip6_header_t * ip,
2617  ip6_hop_by_hop_option_t * opt),
2618  u8 * trace (u8 * s, ip6_hop_by_hop_option_t * opt))
2619 {
2620  ip6_main_t *im = &ip6_main;
2622 
2623  ASSERT ((u32) option < ARRAY_LEN (hm->options));
2624 
2625  /* Already registered */
2626  if (hm->options[option])
2627  return (-1);
2628 
2629  hm->options[option] = options;
2630  hm->trace[option] = trace;
2631 
2632  /* Set global variable */
2633  im->hbh_enabled = 1;
2634 
2635  return (0);
2636 }
2637 
2638 int
2640 {
2641  ip6_main_t *im = &ip6_main;
2643 
2644  ASSERT ((u32) option < ARRAY_LEN (hm->options));
2645 
2646  /* Not registered */
2647  if (!hm->options[option])
2648  return (-1);
2649 
2650  hm->options[option] = NULL;
2651  hm->trace[option] = NULL;
2652 
2653  /* Disable global knob if this was the last option configured */
2654  int i;
2655  bool found = false;
2656  for (i = 0; i < 256; i++)
2657  {
2658  if (hm->options[option])
2659  {
2660  found = true;
2661  break;
2662  }
2663  }
2664  if (!found)
2665  im->hbh_enabled = 0;
2666 
2667  return (0);
2668 }
2669 
2670 /* Global IP6 main. */
2672 #endif
2673 
2674 static clib_error_t *
2676 {
2677  ip6_main_t *im = &ip6_main;
2678  clib_error_t *error;
2679  uword i;
2680 
2681  if ((error = vlib_call_init_function (vm, vnet_feature_init)))
2682  return error;
2683 
2684  for (i = 0; i < ARRAY_LEN (im->fib_masks); i++)
2685  {
2686  u32 j, i0, i1;
2687 
2688  i0 = i / 32;
2689  i1 = i % 32;
2690 
2691  for (j = 0; j < i0; j++)
2692  im->fib_masks[i].as_u32[j] = ~0;
2693 
2694  if (i1)
2695  im->fib_masks[i].as_u32[i0] =
2696  clib_host_to_net_u32 (pow2_mask (i1) << (32 - i1));
2697  }
2698 
2699  ip_lookup_init (&im->lookup_main, /* is_ip6 */ 1);
2700 
2701  if (im->lookup_table_nbuckets == 0)
2703 
2705 
2706  if (im->lookup_table_size == 0)
2708 
2709  clib_bihash_init_24_8 (&(im->ip6_table[IP6_FIB_TABLE_FWDING].ip6_hash),
2710  "ip6 FIB fwding table",
2712  clib_bihash_init_24_8 (&im->ip6_table[IP6_FIB_TABLE_NON_FWDING].ip6_hash,
2713  "ip6 FIB non-fwding table",
2715  clib_bihash_init_40_8 (&im->ip6_mtable.ip6_mhash,
2716  "ip6 mFIB table",
2718 
2719  /* Create FIB with index 0 and table id of 0. */
2724 
2725  {
2726  pg_node_t *pn;
2727  pn = pg_get_node (ip6_lookup_node.index);
2729  }
2730 
2731  /* Unless explicitly configured, don't process HBH options */
2732  im->hbh_enabled = 0;
2733 
2734  {
2735  icmp6_neighbor_solicitation_header_t p;
2736 
2737  clib_memset (&p, 0, sizeof (p));
2738 
2739  p.ip.ip_version_traffic_class_and_flow_label =
2740  clib_host_to_net_u32 (0x6 << 28);
2741  p.ip.payload_length =
2742  clib_host_to_net_u16 (sizeof (p) -
2744  (icmp6_neighbor_solicitation_header_t, neighbor));
2745  p.ip.protocol = IP_PROTOCOL_ICMP6;
2746  p.ip.hop_limit = 255;
2747  ip6_set_solicited_node_multicast_address (&p.ip.dst_address, 0);
2748 
2749  p.neighbor.icmp.type = ICMP6_neighbor_solicitation;
2750 
2751  p.link_layer_option.header.type =
2752  ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address;
2753  p.link_layer_option.header.n_data_u64s =
2754  sizeof (p.link_layer_option) / sizeof (u64);
2755 
2758  &p, sizeof (p),
2759  /* alloc chunk size */ 8,
2760  "ip6 neighbor discovery");
2761  }
2762 
2763  return error;
2764 }
2765 
2767 
2768 static clib_error_t *
2770  unformat_input_t * input, vlib_cli_command_t * cmd)
2771 {
2772  u8 mac[6];
2773  ip6_address_t _a, *a = &_a;
2774 
2775  if (unformat (input, "%U", unformat_ethernet_address, mac))
2776  {
2778  vlib_cli_output (vm, "Link local address: %U", format_ip6_address, a);
2780  vlib_cli_output (vm, "Original MAC address: %U",
2782  }
2783 
2784  return 0;
2785 }
2786 
2787 /*?
2788  * This command converts the given MAC Address into an IPv6 link-local
2789  * address.
2790  *
2791  * @cliexpar
2792  * Example of how to create an IPv6 link-local address:
2793  * @cliexstart{test ip6 link 16:d9:e0:91:79:86}
2794  * Link local address: fe80::14d9:e0ff:fe91:7986
2795  * Original MAC address: 16:d9:e0:91:79:86
2796  * @cliexend
2797 ?*/
2798 /* *INDENT-OFF* */
2800 {
2801  .path = "test ip6 link",
2802  .function = test_ip6_link_command_fn,
2803  .short_help = "test ip6 link <mac-address>",
2804 };
2805 /* *INDENT-ON* */
2806 
2807 #ifndef CLIB_MARCH_VARIANT
2808 int
2810 {
2811  u32 fib_index;
2812 
2813  fib_index = fib_table_find (FIB_PROTOCOL_IP6, table_id);
2814 
2815  if (~0 == fib_index)
2816  return VNET_API_ERROR_NO_SUCH_FIB;
2817 
2819  flow_hash_config);
2820 
2821  return 0;
2822 }
2823 #endif
2824 
2825 static clib_error_t *
2827  unformat_input_t * input,
2828  vlib_cli_command_t * cmd)
2829 {
2830  int matched = 0;
2831  u32 table_id = 0;
2832  u32 flow_hash_config = 0;
2833  int rv;
2834 
2835  while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
2836  {
2837  if (unformat (input, "table %d", &table_id))
2838  matched = 1;
2839 #define _(a,v) \
2840  else if (unformat (input, #a)) { flow_hash_config |= v; matched=1;}
2842 #undef _
2843  else
2844  break;
2845  }
2846 
2847  if (matched == 0)
2848  return clib_error_return (0, "unknown input `%U'",
2849  format_unformat_error, input);
2850 
2851  rv = vnet_set_ip6_flow_hash (table_id, flow_hash_config);
2852  switch (rv)
2853  {
2854  case 0:
2855  break;
2856 
2857  case -1:
2858  return clib_error_return (0, "no such FIB table %d", table_id);
2859 
2860  default:
2861  clib_warning ("BUG: illegal flow hash config 0x%x", flow_hash_config);
2862  break;
2863  }
2864 
2865  return 0;
2866 }
2867 
2868 /*?
2869  * Configure the set of IPv6 fields used by the flow hash.
2870  *
2871  * @cliexpar
2872  * @parblock
2873  * Example of how to set the flow hash on a given table:
2874  * @cliexcmd{set ip6 flow-hash table 8 dst sport dport proto}
2875  *
2876  * Example of display the configured flow hash:
2877  * @cliexstart{show ip6 fib}
2878  * ipv6-VRF:0, fib_index 0, flow hash: src dst sport dport proto
2879  * @::/0
2880  * unicast-ip6-chain
2881  * [@0]: dpo-load-balance: [index:5 buckets:1 uRPF:5 to:[0:0]]
2882  * [0] [@0]: dpo-drop ip6
2883  * fe80::/10
2884  * unicast-ip6-chain
2885  * [@0]: dpo-load-balance: [index:10 buckets:1 uRPF:10 to:[0:0]]
2886  * [0] [@2]: dpo-receive
2887  * ff02::1/128
2888  * unicast-ip6-chain
2889  * [@0]: dpo-load-balance: [index:8 buckets:1 uRPF:8 to:[0:0]]
2890  * [0] [@2]: dpo-receive
2891  * ff02::2/128
2892  * unicast-ip6-chain
2893  * [@0]: dpo-load-balance: [index:7 buckets:1 uRPF:7 to:[0:0]]
2894  * [0] [@2]: dpo-receive
2895  * ff02::16/128
2896  * unicast-ip6-chain
2897  * [@0]: dpo-load-balance: [index:9 buckets:1 uRPF:9 to:[0:0]]
2898  * [0] [@2]: dpo-receive
2899  * ff02::1:ff00:0/104
2900  * unicast-ip6-chain
2901  * [@0]: dpo-load-balance: [index:6 buckets:1 uRPF:6 to:[0:0]]
2902  * [0] [@2]: dpo-receive
2903  * ipv6-VRF:8, fib_index 1, flow hash: dst sport dport proto
2904  * @::/0
2905  * unicast-ip6-chain
2906  * [@0]: dpo-load-balance: [index:21 buckets:1 uRPF:20 to:[0:0]]
2907  * [0] [@0]: dpo-drop ip6
2908  * @::a:1:1:0:4/126
2909  * unicast-ip6-chain
2910  * [@0]: dpo-load-balance: [index:27 buckets:1 uRPF:26 to:[0:0]]
2911  * [0] [@4]: ipv6-glean: af_packet0
2912  * @::a:1:1:0:7/128
2913  * unicast-ip6-chain
2914  * [@0]: dpo-load-balance: [index:28 buckets:1 uRPF:27 to:[0:0]]
2915  * [0] [@2]: dpo-receive: @::a:1:1:0:7 on af_packet0
2916  * fe80::/10
2917  * unicast-ip6-chain
2918  * [@0]: dpo-load-balance: [index:26 buckets:1 uRPF:25 to:[0:0]]
2919  * [0] [@2]: dpo-receive
2920  * fe80::fe:3eff:fe3e:9222/128
2921  * unicast-ip6-chain
2922  * [@0]: dpo-load-balance: [index:29 buckets:1 uRPF:28 to:[0:0]]
2923  * [0] [@2]: dpo-receive: fe80::fe:3eff:fe3e:9222 on af_packet0
2924  * ff02::1/128
2925  * unicast-ip6-chain
2926  * [@0]: dpo-load-balance: [index:24 buckets:1 uRPF:23 to:[0:0]]
2927  * [0] [@2]: dpo-receive
2928  * ff02::2/128
2929  * unicast-ip6-chain
2930  * [@0]: dpo-load-balance: [index:23 buckets:1 uRPF:22 to:[0:0]]
2931  * [0] [@2]: dpo-receive
2932  * ff02::16/128
2933  * unicast-ip6-chain
2934  * [@0]: dpo-load-balance: [index:25 buckets:1 uRPF:24 to:[0:0]]
2935  * [0] [@2]: dpo-receive
2936  * ff02::1:ff00:0/104
2937  * unicast-ip6-chain
2938  * [@0]: dpo-load-balance: [index:22 buckets:1 uRPF:21 to:[0:0]]
2939  * [0] [@2]: dpo-receive
2940  * @cliexend
2941  * @endparblock
2942 ?*/
2943 /* *INDENT-OFF* */
2945 {
2946  .path = "set ip6 flow-hash",
2947  .short_help =
2948  "set ip6 flow-hash table <table-id> [src] [dst] [sport] [dport] [proto] [reverse]",
2949  .function = set_ip6_flow_hash_command_fn,
2950 };
2951 /* *INDENT-ON* */
2952 
2953 static clib_error_t *
2955  unformat_input_t * input, vlib_cli_command_t * cmd)
2956 {
2957  ip6_main_t *im = &ip6_main;
2958  ip_lookup_main_t *lm = &im->lookup_main;
2959  int i;
2960 
2961  vlib_cli_output (vm, "Protocols handled by ip6_local");
2962  for (i = 0; i < ARRAY_LEN (lm->local_next_by_ip_protocol); i++)
2963  {
2965  {
2966 
2967  u32 node_index = vlib_get_node (vm,
2968  ip6_local_node.index)->
2969  next_nodes[lm->local_next_by_ip_protocol[i]];
2970  vlib_cli_output (vm, "%d: %U", i, format_vlib_node_name, vm,
2971  node_index);
2972  }
2973  }
2974  return 0;
2975 }
2976 
2977 
2978 
2979 /*?
2980  * Display the set of protocols handled by the local IPv6 stack.
2981  *
2982  * @cliexpar
2983  * Example of how to display local protocol table:
2984  * @cliexstart{show ip6 local}
2985  * Protocols handled by ip6_local
2986  * 17
2987  * 43
2988  * 58
2989  * 115
2990  * @cliexend
2991 ?*/
2992 /* *INDENT-OFF* */
2994 {
2995  .path = "show ip6 local",
2996  .function = show_ip6_local_command_fn,
2997  .short_help = "show ip6 local",
2998 };
2999 /* *INDENT-ON* */
3000 
3001 #ifndef CLIB_MARCH_VARIANT
3002 int
3004  u32 table_index)
3005 {
3006  vnet_main_t *vnm = vnet_get_main ();
3008  ip6_main_t *ipm = &ip6_main;
3009  ip_lookup_main_t *lm = &ipm->lookup_main;
3011  ip6_address_t *if_addr;
3012 
3013  if (pool_is_free_index (im->sw_interfaces, sw_if_index))
3014  return VNET_API_ERROR_NO_MATCHING_INTERFACE;
3015 
3016  if (table_index != ~0 && pool_is_free_index (cm->tables, table_index))
3017  return VNET_API_ERROR_NO_SUCH_ENTRY;
3018 
3021 
3022  if_addr = ip6_interface_first_address (ipm, sw_if_index);
3023 
3024  if (NULL != if_addr)
3025  {
3026  fib_prefix_t pfx = {
3027  .fp_len = 128,
3028  .fp_proto = FIB_PROTOCOL_IP6,
3029  .fp_addr.ip6 = *if_addr,
3030  };
3031  u32 fib_index;
3032 
3034  sw_if_index);
3035 
3036 
3037  if (table_index != (u32) ~ 0)
3038  {
3039  dpo_id_t dpo = DPO_INVALID;
3040 
3041  dpo_set (&dpo,
3042  DPO_CLASSIFY,
3043  DPO_PROTO_IP6,
3044  classify_dpo_create (DPO_PROTO_IP6, table_index));
3045 
3047  &pfx,
3049  FIB_ENTRY_FLAG_NONE, &dpo);
3050  dpo_reset (&dpo);
3051  }
3052  else
3053  {
3054  fib_table_entry_special_remove (fib_index,
3055  &pfx, FIB_SOURCE_CLASSIFY);
3056  }
3057  }
3058 
3059  return 0;
3060 }
3061 #endif
3062 
3063 static clib_error_t *
3065  unformat_input_t * input,
3066  vlib_cli_command_t * cmd)
3067 {
3068  u32 table_index = ~0;
3069  int table_index_set = 0;
3070  u32 sw_if_index = ~0;
3071  int rv;
3072 
3073  while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
3074  {
3075  if (unformat (input, "table-index %d", &table_index))
3076  table_index_set = 1;
3077  else if (unformat (input, "intfc %U", unformat_vnet_sw_interface,
3078  vnet_get_main (), &sw_if_index))
3079  ;
3080  else
3081  break;
3082  }
3083 
3084  if (table_index_set == 0)
3085  return clib_error_return (0, "classify table-index must be specified");
3086 
3087  if (sw_if_index == ~0)
3088  return clib_error_return (0, "interface / subif must be specified");
3089 
3090  rv = vnet_set_ip6_classify_intfc (vm, sw_if_index, table_index);
3091 
3092  switch (rv)
3093  {
3094  case 0:
3095  break;
3096 
3097  case VNET_API_ERROR_NO_MATCHING_INTERFACE:
3098  return clib_error_return (0, "No such interface");
3099 
3100  case VNET_API_ERROR_NO_SUCH_ENTRY:
3101  return clib_error_return (0, "No such classifier table");
3102  }
3103  return 0;
3104 }
3105 
3106 /*?
3107  * Assign a classification table to an interface. The classification
3108  * table is created using the '<em>classify table</em>' and '<em>classify session</em>'
3109  * commands. Once the table is create, use this command to filter packets
3110  * on an interface.
3111  *
3112  * @cliexpar
3113  * Example of how to assign a classification table to an interface:
3114  * @cliexcmd{set ip6 classify intfc GigabitEthernet2/0/0 table-index 1}
3115 ?*/
3116 /* *INDENT-OFF* */
3118 {
3119  .path = "set ip6 classify",
3120  .short_help =
3121  "set ip6 classify intfc <interface> table-index <classify-idx>",
3122  .function = set_ip6_classify_command_fn,
3123 };
3124 /* *INDENT-ON* */
3125 
3126 static clib_error_t *
3128 {
3129  ip6_main_t *im = &ip6_main;
3130  uword heapsize = 0;
3131  u32 tmp;
3132  u32 nbuckets = 0;
3133 
3134  while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
3135  {
3136  if (unformat (input, "hash-buckets %d", &tmp))
3137  nbuckets = tmp;
3138  else if (unformat (input, "heap-size %U",
3139  unformat_memory_size, &heapsize))
3140  ;
3141  else
3142  return clib_error_return (0, "unknown input '%U'",
3143  format_unformat_error, input);
3144  }
3145 
3146  im->lookup_table_nbuckets = nbuckets;
3147  im->lookup_table_size = heapsize;
3148 
3149  return 0;
3150 }
3151 
3153 
3154 /*
3155  * fd.io coding-style-patch-verification: ON
3156  *
3157  * Local Variables:
3158  * eval: (c-set-style "gnu")
3159  * End:
3160  */
static vlib_cli_command_t set_ip6_flow_hash_command
(constructor) VLIB_CLI_COMMAND (set_ip6_flow_hash_command)
Definition: ip6_forward.c:2944
u8 * format_ip6_forward_next_trace(u8 *s, va_list *args)
Definition: ip6_forward.c:762
#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:198
u16 lb_n_buckets
number of buckets in the load-balance.
Definition: load_balance.h:116
u32 flags
buffer flags: VLIB_BUFFER_FREE_LIST_INDEX_MASK: bits used to store free list index, VLIB_BUFFER_IS_TRACED: trace this buffer.
Definition: buffer.h:124
#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:611
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:1079
typedef address
Definition: ip_types.api:83
static vlib_cli_command_t trace
(constructor) VLIB_CLI_COMMAND (trace)
Definition: vlib_api_cli.c:870
u32 flags
Definition: vhost_user.h:141
static clib_error_t * ip6_sw_interface_admin_up_down(vnet_main_t *vnm, u32 sw_if_index, u32 flags)
Definition: ip6_forward.c:336
#define clib_min(x, y)
Definition: clib.h:295
static vlib_cli_command_t test_link_command
(constructor) VLIB_CLI_COMMAND (test_link_command)
Definition: ip6_forward.c:2799
static u8 * format_ip6_lookup_trace(u8 *s, va_list *args)
Definition: ip6_forward.c:777
#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:241
vl_api_mac_address_t mac
Definition: l2.api:490
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:1057
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
u32 * mfib_index_by_sw_if_index
Table index indexed by software interface.
Definition: ip6.h:197
uword lookup_table_size
Definition: ip6.h:225
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:278
vnet_main_t * vnet_get_main(void)
Definition: misc.c:46
static vnet_hw_interface_t * vnet_get_sup_hw_interface(vnet_main_t *vnm, u32 sw_if_index)
static 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:3064
vl_api_fib_path_nh_t nh
Definition: fib_types.api:126
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:2266
The table that stores ALL routes learned by the DP.
Definition: ip6.h:134
static void ip6_link_local_address_from_ethernet_mac_address(ip6_address_t *ip, u8 *mac)
Definition: ip6.h:400
#define PREDICT_TRUE(x)
Definition: clib.h:112
#define foreach_ip6_hop_by_hop_error
Definition: ip6_forward.c:2136
u8 as_u8[16]
Definition: ip6_packet.h:48
i16 current_data
signed offset in data[], pre_data[] that we are currently processing.
Definition: buffer.h:110
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:339
vlib_node_registration_t ip6_lookup_node
(constructor) VLIB_REGISTER_NODE (ip6_lookup_node)
Definition: ip6_forward.c:552
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:2013
#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:794
#define NULL
Definition: clib.h:58
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:967
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:200
u32 thread_index
Definition: main.h:197
This packet is to be rewritten and forwarded to the next processing node.
Definition: adj.h:73
u16 current_length
Nbytes between current data and the end of this buffer.
Definition: buffer.h:113
u8 data[0]
Packet data.
Definition: buffer.h:181
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:522
int ip6_hbh_unregister_option(u8 option)
Definition: ip6_forward.c:2639
vl_api_address_t src
Definition: gre.api:51
int i
static clib_error_t * ip6_config(vlib_main_t *vm, unformat_input_t *input)
Definition: ip6_forward.c:3127
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
clib_memset(h->entries, 0, sizeof(h->entries[0])*entries)
#define STRUCT_OFFSET_OF(t, f)
Definition: clib.h:65
uword ip_csum_t
Definition: ip_packet.h:219
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:2769
static ip_csum_t ip_csum_with_carry(ip_csum_t sum, ip_csum_t x)
Definition: ip_packet.h:222
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:424
unformat_function_t unformat_vnet_sw_interface
u8 data[128]
Definition: ipsec.api:249
vlib_node_registration_t ip6_rewrite_mcast_node
(constructor) VLIB_REGISTER_NODE (ip6_rewrite_mcast_node)
Definition: ip6_forward.c:2110
#define VLIB_NODE_FN(node)
Definition: node.h:201
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:468
static char * ip6_hop_by_hop_error_strings[]
Definition: ip6_forward.c:2164
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:366
Definition: fib_entry.h:283
ip6_address_t src_address
Definition: ip6_packet.h:383
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
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:360
union ip_adjacency_t_::@48 sub_type
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:783
vlib_packet_template_t discover_neighbor_packet_template
Definition: ip6.h:221
u32 ip6_tcp_udp_icmp_validate_checksum(vlib_main_t *vm, vlib_buffer_t *p0)
Definition: ip6_forward.c:1004
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:2671
static u8 * format_ip6_hop_by_hop_trace(u8 *s, va_list *args)
Definition: ip6_forward.c:2217
u8 * format_ethernet_address(u8 *s, va_list *args)
Definition: format.c:44
clib_bihash_24_8_t ip6_hash
Definition: ip6.h:145
void * vlib_packet_template_get_packet(vlib_main_t *vm, vlib_packet_template_t *t, u32 *bi_result)
Definition: buffer.c:389
#define pool_foreach(VAR, POOL, BODY)
Iterate through pool.
Definition: pool.h:493
#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:440
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:2954
vl_api_interface_index_t sw_if_index
Definition: gre.api:50
#define VLIB_INIT_FUNCTION(x)
Definition: init.h:173
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
#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
vlib_node_registration_t ip6_mcast_midchain_node
(constructor) VLIB_REGISTER_NODE (ip6_mcast_midchain_node)
Definition: ip6_forward.c:2119
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:2826
static_always_inline void calc_checksums(vlib_main_t *vm, vlib_buffer_t *b)
u8 * format_white_space(u8 *s, va_list *va)
Definition: std-formats.c:129
#define vlib_prefetch_buffer_header(b, type)
Prefetch buffer metadata.
Definition: buffer.h:203
#define IP6_FIB_DEFAULT_HASH_NUM_BUCKETS
Definition: ip6.h:59
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:187
#define clib_error_return(e, args...)
Definition: error.h:99
void adj_unlock(adj_index_t adj_index)
Release a reference counting lock on the adjacency.
Definition: adj.c:318
static uword ip6_rewrite_inline_with_gso(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame, int do_counters, int is_midchain, int is_mcast, int do_gso)
Definition: ip6_forward.c:1617
unsigned int u32
Definition: types.h:88
#define clib_error_create(args...)
Definition: error.h:96
struct ip_adjacency_t_::@48::@50 midchain
IP_LOOKUP_NEXT_MIDCHAIN.
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:1075
u16 fp_len
The mask length.
Definition: fib_types.h:207
#define vlib_call_init_function(vm, x)
Definition: init.h:270
static clib_error_t * ip6_sw_interface_add_del(vnet_main_t *vnm, u32 sw_if_index, u32 is_add)
Definition: ip6_forward.c:503
#define VLIB_FRAME_SIZE
Definition: node.h:376
u8 * format_ip6_hop_by_hop_ext_hdr(u8 *s, va_list *args)
Definition: ip6_forward.c:2172
ip6_hop_by_hop_error_t
Definition: ip6_forward.c:2142
void ip6_unregister_protocol(u32 protocol)
Definition: ip6_forward.c:1459
static clib_error_t * vnet_feature_init(vlib_main_t *vm)
Definition: feature.c:22
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:224
Definition: fib_entry.h:281
vl_api_fib_path_type_t type
Definition: fib_types.api:123
u8 packet_data[128-1 *sizeof(u32)]
Definition: ip6_forward.c:756
vlib_error_t error
Error code for buffers to be enqueued to error handler.
Definition: buffer.h:136
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:170
Definition: fib_entry.h:286
vnet_crypto_main_t * cm
Definition: quic_crypto.c:41
static vlib_cli_command_t show_ip6_local
(constructor) VLIB_CLI_COMMAND (show_ip6_local)
Definition: ip6_forward.c:2993
#define pool_elt_at_index(p, i)
Returns pointer to element at given index.
Definition: pool.h:514
vlib_node_registration_t ip6_rewrite_bcast_node
(constructor) VLIB_REGISTER_NODE (ip6_rewrite_bcast_node)
Definition: ip6_forward.c:2102
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:367
u32 * classify_table_index_by_sw_if_index
First table index to use for this interface, ~0 => none.
Definition: lookup.h:135
#define gso_mtu_sz(b)
Definition: buffer.h:430
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:124
static const dpo_id_t * load_balance_get_bucket_i(const load_balance_t *lb, u32 bucket)
Definition: load_balance.h:229
vl_api_ip_proto_t protocol
Definition: punt.api:39
vlib_node_registration_t ip6_input_node
(constructor) VLIB_REGISTER_NODE (ip6_input_node)
Definition: ip6_input.c:230
struct _unformat_input_t unformat_input_t
unsigned short u16
Definition: types.h:57
#define IP6_FIB_DEFAULT_HASH_MEMORY_SIZE
Definition: ip6.h:60
void vlib_put_frame_to_node(vlib_main_t *vm, u32 to_node_index, vlib_frame_t *f)
Definition: main.c:196
static void * vlib_buffer_get_current(vlib_buffer_t *b)
Get pointer to current data to process.
Definition: buffer.h:229
int vnet_set_ip6_flow_hash(u32 table_id, u32 flow_hash_config)
Definition: ip6_forward.c:2809
static u32 ip6_compute_flow_hash(const ip6_header_t *ip, flow_hash_config_t flow_hash_config)
Definition: ip6.h:482
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:699
static clib_error_t * ip6_hop_by_hop_init(vlib_main_t *vm)
Definition: ip6_forward.c:2594
vl_api_address_union_t src_address
Definition: ip_types.api:97
void vnet_sw_interface_update_unnumbered(u32 unnumbered_sw_if_index, u32 ip_sw_if_index, u8 enable)
Definition: interface.c:1494
load_balance_main_t load_balance_main
The one instance of load-balance main.
Definition: load_balance.c:56
#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)
vl_api_address_t dst
Definition: gre.api:52
#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:2615
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:814
u32 as_u32[4]
Definition: ip6_packet.h:50
ip6_address_t fib_masks[129]
Definition: ip6.h:191
u32 classify_table_index
Definition: fib_types.api:68
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:60
#define VLIB_EARLY_CONFIG_FUNCTION(x, n,...)
Definition: init.h:226
Adjacency to drop this packet.
Definition: adj.h:53
#define VLIB_REGISTER_NODE(x,...)
Definition: node.h:169
#define UNFORMAT_END_OF_INPUT
Definition: format.h:145
u16 n_vectors
Definition: node.h:395
format_function_t format_ip6_address
Definition: format.h:93
#define CLIB_PREFETCH(addr, size, type)
Definition: cache.h:80
vlib_main_t * vm
Definition: buffer.c:312
ip6_address_t * ip6_interface_first_address(ip6_main_t *im, u32 sw_if_index)
get first IPv6 interface address
Definition: ip6_forward.c:178
static_always_inline void vlib_buffer_enqueue_to_next(vlib_main_t *vm, vlib_node_runtime_t *node, u32 *buffers, u16 *nexts, uword count)
Definition: buffer_node.h:332
#define vec_free(V)
Free vector&#39;s memory (no header).
Definition: vec.h:341
vlib_node_registration_t ip6_local_node
(constructor) VLIB_REGISTER_NODE (ip6_local_node)
Definition: ip6_forward.c:1401
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:864
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:1033
vlib_node_registration_t ip6_midchain_node
(constructor) VLIB_REGISTER_NODE (ip6_midchain_node)
Definition: ip6_forward.c:2080
static ip_csum_t ip_incremental_checksum(ip_csum_t sum, void *_data, uword n_bytes)
Definition: ip_packet.h:292
#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:127
unformat_function_t * unformat_edit
Definition: pg.h:312
#define vlib_prefetch_buffer_data(b, type)
Definition: buffer.h:204
void ip_lookup_init(ip_lookup_main_t *lm, u32 is_ip6)
Definition: lookup.c:204
#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:458
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:186
vlib_combined_counter_main_t lbm_via_counters
Definition: load_balance.h:47
u8 hbh_enabled
Definition: ip6.h:239
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:104
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:513
void ip6_register_protocol(u32 protocol, u32 node_index)
Definition: ip6_forward.c:1447
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:1469
u8 pre_data[VLIB_BUFFER_PRE_DATA_SIZE]
Space for inserting data before buffer start.
Definition: buffer.h:178
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:2133
ip_lookup_main_t lookup_main
Definition: ip6.h:179
void ip6_hbh_set_next_override(uword next)
Definition: ip6_forward.c:2607
vlib_node_registration_t ip6_local_end_of_arc_node
(constructor) VLIB_REGISTER_NODE (ip6_local_end_of_arc_node)
Definition: ip6_forward.c:1426
static load_balance_t * load_balance_get(index_t lbi)
Definition: load_balance.h:220
The default route source.
Definition: fib_entry.h:142
Classify.
Definition: fib_entry.h:49
static void ip6_addr_fib_init(ip6_address_fib_t *addr_fib, const ip6_address_t *address, u32 fib_index)
Definition: ip6_packet.h:140
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:1134
vlib_node_registration_t ip6_hop_by_hop_node
(constructor) VLIB_REGISTER_NODE (ip6_hop_by_hop_node)
Definition: ip6_forward.c:2580
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:1592
#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:248
vnet_classify_main_t vnet_classify_main
Definition: vnet_classify.c:23
int vnet_set_ip6_classify_intfc(vlib_main_t *vm, u32 sw_if_index, u32 table_index)
Definition: ip6_forward.c:3003
static uword ip6_address_is_link_local_unicast(const ip6_address_t *a)
Definition: ip6_packet.h:326
#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:240
Route added as a result of interface configuration.
Definition: fib_entry.h:59
static uword ip6_address_is_multicast(const ip6_address_t *a)
Definition: ip6_packet.h:187
ip6_fib_table_instance_t ip6_table[IP6_FIB_NUM_TABLES]
The two FIB tables; fwding and non-fwding.
Definition: ip6.h:172
#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:565
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:2088
static void * vlib_add_trace(vlib_main_t *vm, vlib_node_runtime_t *r, vlib_buffer_t *b, u32 n_data_bytes)
Definition: trace_funcs.h:55
#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:242
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:146
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:208
#define HBH_OPTION_TYPE_DISCARD_UNKNOWN
u16 payload_length
Definition: ip6_packet.h:374
index_t dpoi_index
the index of objects of that type
Definition: dpo.h:186
vl_api_address_t ip
Definition: l2.api:489
static void ip6_set_solicited_node_multicast_address(ip6_address_t *a, u32 id)
Definition: ip6_packet.h:217
#define vec_len(v)
Number of elements in vector (rvalue-only, NULL tolerant)
static void ip6_ethernet_mac_address_from_link_local_address(u8 *mac, ip6_address_t *ip)
Definition: ip6.h:416
ip_lookup_next_t lookup_next_index
Next hop after ip4-lookup.
Definition: adj.h:236
u32 next_buffer
Next buffer for this linked-list of buffers.
Definition: buffer.h:140
#define STATIC_ASSERT(truth,...)
Definition: fib_entry.h:282
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:1589
VLIB buffer representation.
Definition: buffer.h:102
u64 uword
Definition: types.h:112
unformat_function_t unformat_pg_ip6_header
Definition: format.h:98
vnet_sw_interface_t * sw_interfaces
Definition: interface.h:833
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:197
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:63
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:63
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:906
unformat_function_t unformat_memory_size
Definition: format.h:296
static vlib_cli_command_t set_ip6_classify_command
(constructor) VLIB_CLI_COMMAND (set_ip6_classify_command)
Definition: ip6_forward.c:3117
ip6_mfib_table_instance_t ip6_mtable
the single MFIB table
Definition: ip6.h:177
u8 *(* trace[256])(u8 *s, ip6_hop_by_hop_option_t *opt)
Definition: ip6.h:635
#define vnet_buffer(b)
Definition: buffer.h:361
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:1038
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:232
#define vec_foreach(var, vec)
Vector iterator.
u16 flags
Copy of main node flags.
Definition: node.h:507
u16 dpoi_next_node
The next VLIB node to follow.
Definition: dpo.h:182
static void * ip_interface_address_get_address(ip_lookup_main_t *lm, ip_interface_address_t *a)
Definition: lookup.h:175
static u32 ip6_lookup(gid_ip6_table_t *db, u32 vni, ip_prefix_t *key)
int(* options[256])(vlib_buffer_t *b, ip6_header_t *ip, ip6_hop_by_hop_option_t *opt)
Definition: ip6.h:633
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:197
static_always_inline void vlib_get_buffers(vlib_main_t *vm, u32 *bi, vlib_buffer_t **b, int count)
Translate array of buffer indices into buffer pointers.
Definition: buffer_funcs.h:244
#define VLIB_NODE_FLAG_TRACE
Definition: node.h:301
static clib_error_t * ip6_lookup_init(vlib_main_t *vm)
Definition: ip6_forward.c:2675
u32 table_id
Definition: fib_types.api:118
#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:486
#define vnet_rewrite_two_headers(rw0, rw1, p0, p1, most_likely_size)
Definition: rewrite.h:202
#define CLIB_CACHE_LINE_BYTES
Definition: cache.h:59
vlib_node_registration_t ip6_load_balance_node
(constructor) VLIB_REGISTER_NODE (ip6_load_balance_node)
Definition: ip6_forward.c:739
This adjacency/interface has output features configured.
Definition: rewrite.h:57
IPv6 Forwarding.
void vlib_cli_output(vlib_main_t *vm, char *fmt,...)
Definition: cli.c:768
u32 * fib_index_by_sw_if_index
Definition: ip6.h:194
static vlib_buffer_t * vlib_get_buffer(vlib_main_t *vm, u32 buffer_index)
Translate buffer index into buffer pointer.
Definition: buffer_funcs.h:85
#define HBH_OPTION_TYPE_HIGH_ORDER_BITS
Definition: pg.h:309
static u16 ip_csum_fold(ip_csum_t c)
Definition: ip_packet.h:275
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:978
Definition: defs.h:46
clib_bihash_40_8_t ip6_mhash
Definition: ip6.h:159
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:383
static uword unformat_check_input(unformat_input_t *i)
Definition: format.h:171
uword next_override
Definition: ip6.h:636
signed short i16
Definition: types.h:46
ip6_rewrite_next_t
Definition: ip6_forward.c:1577
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