2 * Copyright (c) 2016 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
16 * ip/ip6_forward.c: IP v6 forwarding
18 * Copyright (c) 2008 Eliot Dresselhaus
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:
28 * The above copyright notice and this permission notice shall be
29 * included in all copies or substantial portions of the Software.
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.
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>
50 #include <vnet/dpo/load_balance_map.h>
51 #include <vnet/dpo/classify_dpo.h>
53 #include <vppinfra/bihash_template.c>
54 #include <vnet/ip/ip6_forward.h>
56 /* Flag used by IOAM code. Classifier sets it pop-hop-by-hop checks it */
57 #define OI_DECAP 0x80000000
60 ip6_add_interface_routes (vnet_main_t * vnm, u32 sw_if_index,
61 ip6_main_t * im, u32 fib_index,
62 ip_interface_address_t * a)
64 ip_lookup_main_t *lm = &im->lookup_main;
65 ip6_address_t *address = ip_interface_address_get_address (lm, a);
67 .fp_len = a->address_length,
68 .fp_proto = FIB_PROTOCOL_IP6,
69 .fp_addr.ip6 = *address,
72 if (a->address_length < 128)
74 fib_table_entry_update_one_path (fib_index,
77 (FIB_ENTRY_FLAG_CONNECTED |
78 FIB_ENTRY_FLAG_ATTACHED),
80 /* No next-hop address */
82 /* invalid FIB index */
85 NULL, FIB_ROUTE_PATH_FLAG_NONE);
89 if (sw_if_index < vec_len (lm->classify_table_index_by_sw_if_index))
91 u32 classify_table_index =
92 lm->classify_table_index_by_sw_if_index[sw_if_index];
93 if (classify_table_index != (u32) ~ 0)
95 dpo_id_t dpo = DPO_INVALID;
100 classify_dpo_create (DPO_PROTO_IP6, classify_table_index));
102 fib_table_entry_special_dpo_add (fib_index,
105 FIB_ENTRY_FLAG_NONE, &dpo);
110 fib_table_entry_update_one_path (fib_index, &pfx,
111 FIB_SOURCE_INTERFACE,
112 (FIB_ENTRY_FLAG_CONNECTED |
113 FIB_ENTRY_FLAG_LOCAL),
117 1, NULL, FIB_ROUTE_PATH_FLAG_NONE);
121 ip6_del_interface_routes (ip6_main_t * im,
123 ip6_address_t * address, u32 address_length)
126 .fp_len = address_length,
127 .fp_proto = FIB_PROTOCOL_IP6,
128 .fp_addr.ip6 = *address,
131 if (pfx.fp_len < 128)
133 fib_table_entry_delete (fib_index, &pfx, FIB_SOURCE_INTERFACE);
138 fib_table_entry_delete (fib_index, &pfx, FIB_SOURCE_INTERFACE);
142 ip6_sw_interface_enable_disable (u32 sw_if_index, u32 is_enable)
144 ip6_main_t *im = &ip6_main;
146 vec_validate_init_empty (im->ip_enabled_by_sw_if_index, sw_if_index, 0);
149 * enable/disable only on the 1<->0 transition
153 if (1 != ++im->ip_enabled_by_sw_if_index[sw_if_index])
158 /* The ref count is 0 when an address is removed from an interface that has
159 * no address - this is not a ciritical error */
160 if (0 == im->ip_enabled_by_sw_if_index[sw_if_index] ||
161 0 != --im->ip_enabled_by_sw_if_index[sw_if_index])
165 vnet_feature_enable_disable ("ip6-unicast", "ip6-not-enabled", sw_if_index,
168 vnet_feature_enable_disable ("ip6-multicast", "ip6-not-enabled",
169 sw_if_index, !is_enable, 0, 0);
172 /* get first interface address */
174 ip6_interface_first_address (ip6_main_t * im, u32 sw_if_index)
176 ip_lookup_main_t *lm = &im->lookup_main;
177 ip_interface_address_t *ia = 0;
178 ip6_address_t *result = 0;
181 foreach_ip_interface_address (lm, ia, sw_if_index,
182 1 /* honor unnumbered */,
184 ip6_address_t * a = ip_interface_address_get_address (lm, ia);
193 ip6_add_del_interface_address (vlib_main_t * vm,
195 ip6_address_t * address,
196 u32 address_length, u32 is_del)
198 vnet_main_t *vnm = vnet_get_main ();
199 ip6_main_t *im = &ip6_main;
200 ip_lookup_main_t *lm = &im->lookup_main;
202 u32 if_address_index;
203 ip6_address_fib_t ip6_af, *addr_fib = 0;
205 /* local0 interface doesn't support IP addressing */
206 if (sw_if_index == 0)
209 clib_error_create ("local0 interface doesn't support IP addressing");
212 vec_validate (im->fib_index_by_sw_if_index, sw_if_index);
213 vec_validate (im->mfib_index_by_sw_if_index, sw_if_index);
215 ip6_addr_fib_init (&ip6_af, address,
216 vec_elt (im->fib_index_by_sw_if_index, sw_if_index));
217 vec_add1 (addr_fib, ip6_af);
222 /* When adding an address check that it does not conflict
223 with an existing address on any interface in this table. */
224 ip_interface_address_t *ia;
225 vnet_sw_interface_t *sif;
227 pool_foreach(sif, vnm->interface_main.sw_interfaces,
229 if (im->fib_index_by_sw_if_index[sw_if_index] ==
230 im->fib_index_by_sw_if_index[sif->sw_if_index])
232 foreach_ip_interface_address
233 (&im->lookup_main, ia, sif->sw_if_index,
234 0 /* honor unnumbered */ ,
237 ip_interface_address_get_address
238 (&im->lookup_main, ia);
239 if (ip6_destination_matches_route
240 (im, address, x, ia->address_length) ||
241 ip6_destination_matches_route (im,
246 vnm->api_errno = VNET_API_ERROR_DUPLICATE_IF_ADDRESS;
249 ("failed to add %U which conflicts with %U for interface %U",
250 format_ip6_address_and_length, address,
252 format_ip6_address_and_length, x,
254 format_vnet_sw_if_index_name, vnm,
264 uword elts_before = pool_elts (lm->if_address_pool);
266 error = ip_interface_address_add_del
267 (lm, sw_if_index, addr_fib, address_length, is_del, &if_address_index);
271 /* Pool did not grow: add duplicate address. */
272 if (elts_before == pool_elts (lm->if_address_pool))
276 ip6_sw_interface_enable_disable (sw_if_index, !is_del);
279 ip6_del_interface_routes (im, ip6_af.fib_index, address, address_length);
281 ip6_add_interface_routes (vnm, sw_if_index,
282 im, ip6_af.fib_index,
283 pool_elt_at_index (lm->if_address_pool,
287 ip6_add_del_interface_address_callback_t *cb;
288 vec_foreach (cb, im->add_del_interface_address_callbacks)
289 cb->function (im, cb->function_opaque, sw_if_index,
290 address, address_length, if_address_index, is_del);
299 ip6_sw_interface_admin_up_down (vnet_main_t * vnm, u32 sw_if_index, u32 flags)
301 ip6_main_t *im = &ip6_main;
302 ip_interface_address_t *ia;
304 u32 is_admin_up, fib_index;
306 /* Fill in lookup tables with default table (0). */
307 vec_validate (im->fib_index_by_sw_if_index, sw_if_index);
309 vec_validate_init_empty (im->
310 lookup_main.if_address_pool_index_by_sw_if_index,
313 is_admin_up = (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) != 0;
315 fib_index = vec_elt (im->fib_index_by_sw_if_index, sw_if_index);
318 foreach_ip_interface_address (&im->lookup_main, ia, sw_if_index,
319 0 /* honor unnumbered */,
321 a = ip_interface_address_get_address (&im->lookup_main, ia);
323 ip6_add_interface_routes (vnm, sw_if_index,
327 ip6_del_interface_routes (im, fib_index,
328 a, ia->address_length);
335 VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION (ip6_sw_interface_admin_up_down);
337 /* Built-in ip6 unicast rx feature path definition */
339 VNET_FEATURE_ARC_INIT (ip6_unicast, static) =
341 .arc_name = "ip6-unicast",
342 .start_nodes = VNET_FEATURES ("ip6-input"),
343 .arc_index_ptr = &ip6_main.lookup_main.ucast_feature_arc_index,
346 VNET_FEATURE_INIT (ip6_flow_classify, static) =
348 .arc_name = "ip6-unicast",
349 .node_name = "ip6-flow-classify",
350 .runs_before = VNET_FEATURES ("ip6-inacl"),
353 VNET_FEATURE_INIT (ip6_inacl, static) =
355 .arc_name = "ip6-unicast",
356 .node_name = "ip6-inacl",
357 .runs_before = VNET_FEATURES ("ip6-policer-classify"),
360 VNET_FEATURE_INIT (ip6_policer_classify, static) =
362 .arc_name = "ip6-unicast",
363 .node_name = "ip6-policer-classify",
364 .runs_before = VNET_FEATURES ("ipsec-input-ip6"),
367 VNET_FEATURE_INIT (ip6_ipsec, static) =
369 .arc_name = "ip6-unicast",
370 .node_name = "ipsec-input-ip6",
371 .runs_before = VNET_FEATURES ("l2tp-decap"),
374 VNET_FEATURE_INIT (ip6_l2tp, static) =
376 .arc_name = "ip6-unicast",
377 .node_name = "l2tp-decap",
378 .runs_before = VNET_FEATURES ("vpath-input-ip6"),
381 VNET_FEATURE_INIT (ip6_vpath, static) =
383 .arc_name = "ip6-unicast",
384 .node_name = "vpath-input-ip6",
385 .runs_before = VNET_FEATURES ("ip6-vxlan-bypass"),
388 VNET_FEATURE_INIT (ip6_vxlan_bypass, static) =
390 .arc_name = "ip6-unicast",
391 .node_name = "ip6-vxlan-bypass",
392 .runs_before = VNET_FEATURES ("ip6-lookup"),
395 VNET_FEATURE_INIT (ip6_not_enabled, static) =
397 .arc_name = "ip6-unicast",
398 .node_name = "ip6-not-enabled",
399 .runs_before = VNET_FEATURES ("ip6-lookup"),
402 VNET_FEATURE_INIT (ip6_lookup, static) =
404 .arc_name = "ip6-unicast",
405 .node_name = "ip6-lookup",
406 .runs_before = 0, /*last feature*/
409 /* Built-in ip6 multicast rx feature path definition (none now) */
410 VNET_FEATURE_ARC_INIT (ip6_multicast, static) =
412 .arc_name = "ip6-multicast",
413 .start_nodes = VNET_FEATURES ("ip6-input"),
414 .arc_index_ptr = &ip6_main.lookup_main.mcast_feature_arc_index,
417 VNET_FEATURE_INIT (ip6_vpath_mc, static) = {
418 .arc_name = "ip6-multicast",
419 .node_name = "vpath-input-ip6",
420 .runs_before = VNET_FEATURES ("ip6-mfib-forward-lookup"),
423 VNET_FEATURE_INIT (ip6_not_enabled_mc, static) = {
424 .arc_name = "ip6-multicast",
425 .node_name = "ip6-not-enabled",
426 .runs_before = VNET_FEATURES ("ip6-mfib-forward-lookup"),
429 VNET_FEATURE_INIT (ip6_mc_lookup, static) = {
430 .arc_name = "ip6-multicast",
431 .node_name = "ip6-mfib-forward-lookup",
432 .runs_before = 0, /* last feature */
435 /* Built-in ip4 tx feature path definition */
436 VNET_FEATURE_ARC_INIT (ip6_output, static) =
438 .arc_name = "ip6-output",
439 .start_nodes = VNET_FEATURES ("ip6-rewrite", "ip6-midchain", "ip6-dvr-dpo"),
440 .arc_index_ptr = &ip6_main.lookup_main.output_feature_arc_index,
443 VNET_FEATURE_INIT (ip6_outacl, static) = {
444 .arc_name = "ip6-output",
445 .node_name = "ip6-outacl",
446 .runs_before = VNET_FEATURES ("ipsec-output-ip6"),
449 VNET_FEATURE_INIT (ip6_ipsec_output, static) = {
450 .arc_name = "ip6-output",
451 .node_name = "ipsec-output-ip6",
452 .runs_before = VNET_FEATURES ("interface-output"),
455 VNET_FEATURE_INIT (ip6_interface_output, static) = {
456 .arc_name = "ip6-output",
457 .node_name = "interface-output",
458 .runs_before = 0, /* not before any other features */
463 ip6_sw_interface_add_del (vnet_main_t * vnm, u32 sw_if_index, u32 is_add)
465 ip6_main_t *im = &ip6_main;
467 vec_validate (im->fib_index_by_sw_if_index, sw_if_index);
468 vec_validate (im->mfib_index_by_sw_if_index, sw_if_index);
472 /* Ensure that IPv6 is disabled */
473 ip6_main_t *im6 = &ip6_main;
474 ip_lookup_main_t *lm6 = &im6->lookup_main;
475 ip_interface_address_t *ia = 0;
476 ip6_address_t *address;
477 vlib_main_t *vm = vlib_get_main ();
479 ip6_neighbor_sw_interface_add_del (vnm, sw_if_index, 0 /* is_add */ );
480 vnet_sw_interface_update_unnumbered (sw_if_index, ~0, 0);
482 foreach_ip_interface_address (lm6, ia, sw_if_index, 0,
484 address = ip_interface_address_get_address (lm6, ia);
485 ip6_add_del_interface_address(vm, sw_if_index, address, ia->address_length, 1);
488 ip6_mfib_interface_enable_disable (sw_if_index, 0);
491 vnet_feature_enable_disable ("ip6-unicast", "ip6-not-enabled", sw_if_index,
494 vnet_feature_enable_disable ("ip6-multicast", "ip6-not-enabled",
495 sw_if_index, is_add, 0, 0);
497 return /* no error */ 0;
500 VNET_SW_INTERFACE_ADD_DEL_FUNCTION (ip6_sw_interface_add_del);
503 ip6_lookup (vlib_main_t * vm,
504 vlib_node_runtime_t * node, vlib_frame_t * frame)
506 return ip6_lookup_inline (vm, node, frame);
509 static u8 *format_ip6_lookup_trace (u8 * s, va_list * args);
512 VLIB_REGISTER_NODE (ip6_lookup_node) =
514 .function = ip6_lookup,
515 .name = "ip6-lookup",
516 .vector_size = sizeof (u32),
517 .format_trace = format_ip6_lookup_trace,
518 .n_next_nodes = IP6_LOOKUP_N_NEXT,
519 .next_nodes = IP6_LOOKUP_NEXT_NODES,
523 VLIB_NODE_FUNCTION_MULTIARCH (ip6_lookup_node, ip6_lookup);
526 ip6_load_balance (vlib_main_t * vm,
527 vlib_node_runtime_t * node, vlib_frame_t * frame)
529 vlib_combined_counter_main_t *cm = &load_balance_main.lbm_via_counters;
530 u32 n_left_from, n_left_to_next, *from, *to_next;
531 ip_lookup_next_t next;
532 u32 thread_index = vm->thread_index;
533 ip6_main_t *im = &ip6_main;
535 from = vlib_frame_vector_args (frame);
536 n_left_from = frame->n_vectors;
537 next = node->cached_next_index;
539 if (node->flags & VLIB_NODE_FLAG_TRACE)
540 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
542 while (n_left_from > 0)
544 vlib_get_next_frame (vm, node, next, to_next, n_left_to_next);
547 while (n_left_from >= 4 && n_left_to_next >= 2)
549 ip_lookup_next_t next0, next1;
550 const load_balance_t *lb0, *lb1;
551 vlib_buffer_t *p0, *p1;
552 u32 pi0, lbi0, hc0, pi1, lbi1, hc1;
553 const ip6_header_t *ip0, *ip1;
554 const dpo_id_t *dpo0, *dpo1;
556 /* Prefetch next iteration. */
558 vlib_buffer_t *p2, *p3;
560 p2 = vlib_get_buffer (vm, from[2]);
561 p3 = vlib_get_buffer (vm, from[3]);
563 vlib_prefetch_buffer_header (p2, STORE);
564 vlib_prefetch_buffer_header (p3, STORE);
566 CLIB_PREFETCH (p2->data, sizeof (ip0[0]), STORE);
567 CLIB_PREFETCH (p3->data, sizeof (ip0[0]), STORE);
570 pi0 = to_next[0] = from[0];
571 pi1 = to_next[1] = from[1];
578 p0 = vlib_get_buffer (vm, pi0);
579 p1 = vlib_get_buffer (vm, pi1);
581 ip0 = vlib_buffer_get_current (p0);
582 ip1 = vlib_buffer_get_current (p1);
583 lbi0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
584 lbi1 = vnet_buffer (p1)->ip.adj_index[VLIB_TX];
586 lb0 = load_balance_get (lbi0);
587 lb1 = load_balance_get (lbi1);
590 * this node is for via FIBs we can re-use the hash value from the
591 * to node if present.
592 * We don't want to use the same hash value at each level in the recursion
593 * graph as that would lead to polarisation
597 if (PREDICT_FALSE (lb0->lb_n_buckets > 1))
599 if (PREDICT_TRUE (vnet_buffer (p0)->ip.flow_hash))
601 hc0 = vnet_buffer (p0)->ip.flow_hash =
602 vnet_buffer (p0)->ip.flow_hash >> 1;
606 hc0 = vnet_buffer (p0)->ip.flow_hash =
607 ip6_compute_flow_hash (ip0, lb0->lb_hash_config);
610 load_balance_get_fwd_bucket (lb0,
612 lb0->lb_n_buckets_minus_1));
616 dpo0 = load_balance_get_bucket_i (lb0, 0);
618 if (PREDICT_FALSE (lb1->lb_n_buckets > 1))
620 if (PREDICT_TRUE (vnet_buffer (p1)->ip.flow_hash))
622 hc1 = vnet_buffer (p1)->ip.flow_hash =
623 vnet_buffer (p1)->ip.flow_hash >> 1;
627 hc1 = vnet_buffer (p1)->ip.flow_hash =
628 ip6_compute_flow_hash (ip1, lb1->lb_hash_config);
631 load_balance_get_fwd_bucket (lb1,
633 lb1->lb_n_buckets_minus_1));
637 dpo1 = load_balance_get_bucket_i (lb1, 0);
640 next0 = dpo0->dpoi_next_node;
641 next1 = dpo1->dpoi_next_node;
643 /* Only process the HBH Option Header if explicitly configured to do so */
645 (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
647 next0 = (dpo_is_adj (dpo0) && im->hbh_enabled) ?
648 (ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next0;
650 /* Only process the HBH Option Header if explicitly configured to do so */
652 (ip1->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
654 next1 = (dpo_is_adj (dpo1) && im->hbh_enabled) ?
655 (ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next1;
658 vnet_buffer (p0)->ip.adj_index[VLIB_TX] = dpo0->dpoi_index;
659 vnet_buffer (p1)->ip.adj_index[VLIB_TX] = dpo1->dpoi_index;
661 vlib_increment_combined_counter
662 (cm, thread_index, lbi0, 1, vlib_buffer_length_in_chain (vm, p0));
663 vlib_increment_combined_counter
664 (cm, thread_index, lbi1, 1, vlib_buffer_length_in_chain (vm, p1));
666 vlib_validate_buffer_enqueue_x2 (vm, node, next,
667 to_next, n_left_to_next,
668 pi0, pi1, next0, next1);
671 while (n_left_from > 0 && n_left_to_next > 0)
673 ip_lookup_next_t next0;
674 const load_balance_t *lb0;
677 const ip6_header_t *ip0;
678 const dpo_id_t *dpo0;
687 p0 = vlib_get_buffer (vm, pi0);
689 ip0 = vlib_buffer_get_current (p0);
690 lbi0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
692 lb0 = load_balance_get (lbi0);
695 if (PREDICT_FALSE (lb0->lb_n_buckets > 1))
697 if (PREDICT_TRUE (vnet_buffer (p0)->ip.flow_hash))
699 hc0 = vnet_buffer (p0)->ip.flow_hash =
700 vnet_buffer (p0)->ip.flow_hash >> 1;
704 hc0 = vnet_buffer (p0)->ip.flow_hash =
705 ip6_compute_flow_hash (ip0, lb0->lb_hash_config);
708 load_balance_get_fwd_bucket (lb0,
710 lb0->lb_n_buckets_minus_1));
714 dpo0 = load_balance_get_bucket_i (lb0, 0);
717 next0 = dpo0->dpoi_next_node;
718 vnet_buffer (p0)->ip.adj_index[VLIB_TX] = dpo0->dpoi_index;
720 /* Only process the HBH Option Header if explicitly configured to do so */
722 (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
724 next0 = (dpo_is_adj (dpo0) && im->hbh_enabled) ?
725 (ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next0;
728 vlib_increment_combined_counter
729 (cm, thread_index, lbi0, 1, vlib_buffer_length_in_chain (vm, p0));
731 vlib_validate_buffer_enqueue_x1 (vm, node, next,
732 to_next, n_left_to_next,
736 vlib_put_next_frame (vm, node, next, n_left_to_next);
739 return frame->n_vectors;
743 VLIB_REGISTER_NODE (ip6_load_balance_node) =
745 .function = ip6_load_balance,
746 .name = "ip6-load-balance",
747 .vector_size = sizeof (u32),
748 .sibling_of = "ip6-lookup",
749 .format_trace = format_ip6_lookup_trace,
753 VLIB_NODE_FUNCTION_MULTIARCH (ip6_load_balance_node, ip6_load_balance);
757 /* Adjacency taken. */
762 /* Packet data, possibly *after* rewrite. */
763 u8 packet_data[128 - 1 * sizeof (u32)];
765 ip6_forward_next_trace_t;
768 format_ip6_forward_next_trace (u8 * s, va_list * args)
770 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
771 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
772 ip6_forward_next_trace_t *t = va_arg (*args, ip6_forward_next_trace_t *);
773 u32 indent = format_get_indent (s);
775 s = format (s, "%U%U",
776 format_white_space, indent,
777 format_ip6_header, t->packet_data, sizeof (t->packet_data));
782 format_ip6_lookup_trace (u8 * s, va_list * args)
784 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
785 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
786 ip6_forward_next_trace_t *t = va_arg (*args, ip6_forward_next_trace_t *);
787 u32 indent = format_get_indent (s);
789 s = format (s, "fib %d dpo-idx %d flow hash: 0x%08x",
790 t->fib_index, t->adj_index, t->flow_hash);
791 s = format (s, "\n%U%U",
792 format_white_space, indent,
793 format_ip6_header, t->packet_data, sizeof (t->packet_data));
799 format_ip6_rewrite_trace (u8 * s, va_list * args)
801 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
802 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
803 ip6_forward_next_trace_t *t = va_arg (*args, ip6_forward_next_trace_t *);
804 u32 indent = format_get_indent (s);
806 s = format (s, "tx_sw_if_index %d adj-idx %d : %U flow hash: 0x%08x",
807 t->fib_index, t->adj_index, format_ip_adjacency,
808 t->adj_index, FORMAT_IP_ADJACENCY_NONE, t->flow_hash);
809 s = format (s, "\n%U%U",
810 format_white_space, indent,
811 format_ip_adjacency_packet_data,
812 t->adj_index, t->packet_data, sizeof (t->packet_data));
816 /* Common trace function for all ip6-forward next nodes. */
818 ip6_forward_next_trace (vlib_main_t * vm,
819 vlib_node_runtime_t * node,
820 vlib_frame_t * frame, vlib_rx_or_tx_t which_adj_index)
823 ip6_main_t *im = &ip6_main;
825 n_left = frame->n_vectors;
826 from = vlib_frame_vector_args (frame);
831 vlib_buffer_t *b0, *b1;
832 ip6_forward_next_trace_t *t0, *t1;
834 /* Prefetch next iteration. */
835 vlib_prefetch_buffer_with_index (vm, from[2], LOAD);
836 vlib_prefetch_buffer_with_index (vm, from[3], LOAD);
841 b0 = vlib_get_buffer (vm, bi0);
842 b1 = vlib_get_buffer (vm, bi1);
844 if (b0->flags & VLIB_BUFFER_IS_TRACED)
846 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
847 t0->adj_index = vnet_buffer (b0)->ip.adj_index[which_adj_index];
848 t0->flow_hash = vnet_buffer (b0)->ip.flow_hash;
850 (vnet_buffer (b0)->sw_if_index[VLIB_TX] !=
851 (u32) ~ 0) ? vnet_buffer (b0)->sw_if_index[VLIB_TX] :
852 vec_elt (im->fib_index_by_sw_if_index,
853 vnet_buffer (b0)->sw_if_index[VLIB_RX]);
855 clib_memcpy (t0->packet_data,
856 vlib_buffer_get_current (b0),
857 sizeof (t0->packet_data));
859 if (b1->flags & VLIB_BUFFER_IS_TRACED)
861 t1 = vlib_add_trace (vm, node, b1, sizeof (t1[0]));
862 t1->adj_index = vnet_buffer (b1)->ip.adj_index[which_adj_index];
863 t1->flow_hash = vnet_buffer (b1)->ip.flow_hash;
865 (vnet_buffer (b1)->sw_if_index[VLIB_TX] !=
866 (u32) ~ 0) ? vnet_buffer (b1)->sw_if_index[VLIB_TX] :
867 vec_elt (im->fib_index_by_sw_if_index,
868 vnet_buffer (b1)->sw_if_index[VLIB_RX]);
870 clib_memcpy (t1->packet_data,
871 vlib_buffer_get_current (b1),
872 sizeof (t1->packet_data));
882 ip6_forward_next_trace_t *t0;
886 b0 = vlib_get_buffer (vm, bi0);
888 if (b0->flags & VLIB_BUFFER_IS_TRACED)
890 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
891 t0->adj_index = vnet_buffer (b0)->ip.adj_index[which_adj_index];
892 t0->flow_hash = vnet_buffer (b0)->ip.flow_hash;
894 (vnet_buffer (b0)->sw_if_index[VLIB_TX] !=
895 (u32) ~ 0) ? vnet_buffer (b0)->sw_if_index[VLIB_TX] :
896 vec_elt (im->fib_index_by_sw_if_index,
897 vnet_buffer (b0)->sw_if_index[VLIB_RX]);
899 clib_memcpy (t0->packet_data,
900 vlib_buffer_get_current (b0),
901 sizeof (t0->packet_data));
908 /* Compute TCP/UDP/ICMP6 checksum in software. */
910 ip6_tcp_udp_icmp_compute_checksum (vlib_main_t * vm, vlib_buffer_t * p0,
911 ip6_header_t * ip0, int *bogus_lengthp)
914 u16 sum16, payload_length_host_byte_order;
915 u32 i, n_this_buffer, n_bytes_left;
916 u32 headers_size = sizeof (ip0[0]);
917 void *data_this_buffer;
919 ASSERT (bogus_lengthp);
922 /* Initialize checksum with ip header. */
923 sum0 = ip0->payload_length + clib_host_to_net_u16 (ip0->protocol);
924 payload_length_host_byte_order = clib_net_to_host_u16 (ip0->payload_length);
925 data_this_buffer = (void *) (ip0 + 1);
927 for (i = 0; i < ARRAY_LEN (ip0->src_address.as_uword); i++)
929 sum0 = ip_csum_with_carry (sum0,
930 clib_mem_unaligned (&ip0->
931 src_address.as_uword[i],
934 ip_csum_with_carry (sum0,
935 clib_mem_unaligned (&ip0->dst_address.as_uword[i],
939 /* some icmp packets may come with a "router alert" hop-by-hop extension header (e.g., mldv2 packets)
940 * or UDP-Ping packets */
941 if (PREDICT_FALSE (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
944 ip6_hop_by_hop_ext_t *ext_hdr =
945 (ip6_hop_by_hop_ext_t *) data_this_buffer;
947 /* validate really icmp6 next */
948 ASSERT ((ext_hdr->next_hdr == IP_PROTOCOL_ICMP6)
949 || (ext_hdr->next_hdr == IP_PROTOCOL_UDP));
951 skip_bytes = 8 * (1 + ext_hdr->n_data_u64s);
952 data_this_buffer = (void *) ((u8 *) data_this_buffer + skip_bytes);
954 payload_length_host_byte_order -= skip_bytes;
955 headers_size += skip_bytes;
958 n_bytes_left = n_this_buffer = payload_length_host_byte_order;
959 if (p0 && n_this_buffer + headers_size > p0->current_length)
962 headers_size ? p0->current_length - headers_size : 0;
965 sum0 = ip_incremental_checksum (sum0, data_this_buffer, n_this_buffer);
966 n_bytes_left -= n_this_buffer;
967 if (n_bytes_left == 0)
970 if (!(p0->flags & VLIB_BUFFER_NEXT_PRESENT))
975 p0 = vlib_get_buffer (vm, p0->next_buffer);
976 data_this_buffer = vlib_buffer_get_current (p0);
977 n_this_buffer = p0->current_length;
980 sum16 = ~ip_csum_fold (sum0);
986 ip6_tcp_udp_icmp_validate_checksum (vlib_main_t * vm, vlib_buffer_t * p0)
988 ip6_header_t *ip0 = vlib_buffer_get_current (p0);
993 /* some icmp packets may come with a "router alert" hop-by-hop extension header (e.g., mldv2 packets) */
994 ASSERT (ip0->protocol == IP_PROTOCOL_TCP
995 || ip0->protocol == IP_PROTOCOL_ICMP6
996 || ip0->protocol == IP_PROTOCOL_UDP
997 || ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS);
999 udp0 = (void *) (ip0 + 1);
1000 if (ip0->protocol == IP_PROTOCOL_UDP && udp0->checksum == 0)
1002 p0->flags |= (VNET_BUFFER_F_L4_CHECKSUM_COMPUTED
1003 | VNET_BUFFER_F_L4_CHECKSUM_CORRECT);
1007 sum16 = ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip0, &bogus_length);
1009 p0->flags |= (VNET_BUFFER_F_L4_CHECKSUM_COMPUTED
1010 | ((sum16 == 0) << VNET_BUFFER_F_LOG2_L4_CHECKSUM_CORRECT));
1016 * @brief returns number of links on which src is reachable.
1019 ip6_urpf_loose_check (ip6_main_t * im, vlib_buffer_t * b, ip6_header_t * i)
1021 const load_balance_t *lb0;
1025 fib_index = vec_elt (im->fib_index_by_sw_if_index,
1026 vnet_buffer (b)->sw_if_index[VLIB_RX]);
1028 (vnet_buffer (b)->sw_if_index[VLIB_TX] == (u32) ~ 0) ?
1029 fib_index : vnet_buffer (b)->sw_if_index[VLIB_TX];
1031 lbi = ip6_fib_table_fwding_lookup (im, fib_index, &i->src_address);
1032 lb0 = load_balance_get (lbi);
1034 return (fib_urpf_check_size (lb0->lb_urpf));
1038 ip6_next_proto_is_tcp_udp (vlib_buffer_t * p0, ip6_header_t * ip0,
1042 proto0 = ip6_locate_header (p0, ip0, IP_PROTOCOL_UDP, udp_offset0);
1043 if (proto0 != IP_PROTOCOL_UDP)
1045 proto0 = ip6_locate_header (p0, ip0, IP_PROTOCOL_TCP, udp_offset0);
1046 proto0 = (proto0 == IP_PROTOCOL_TCP) ? proto0 : 0;
1052 VNET_FEATURE_ARC_INIT (ip6_local) =
1054 .arc_name = "ip6-local",
1055 .start_nodes = VNET_FEATURES ("ip6-local"),
1060 ip6_local_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
1061 vlib_frame_t * frame, int head_of_feature_arc)
1063 ip6_main_t *im = &ip6_main;
1064 ip_lookup_main_t *lm = &im->lookup_main;
1065 ip_local_next_t next_index;
1066 u32 *from, *to_next, n_left_from, n_left_to_next;
1067 vlib_node_runtime_t *error_node =
1068 vlib_node_get_runtime (vm, ip6_input_node.index);
1069 u8 arc_index = vnet_feat_arc_ip6_local.feature_arc_index;
1071 from = vlib_frame_vector_args (frame);
1072 n_left_from = frame->n_vectors;
1073 next_index = node->cached_next_index;
1075 if (node->flags & VLIB_NODE_FLAG_TRACE)
1076 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
1078 while (n_left_from > 0)
1080 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1082 while (n_left_from >= 4 && n_left_to_next >= 2)
1084 vlib_buffer_t *p0, *p1;
1085 ip6_header_t *ip0, *ip1;
1086 udp_header_t *udp0, *udp1;
1087 u32 pi0, ip_len0, udp_len0, flags0, next0;
1088 u32 pi1, ip_len1, udp_len1, flags1, next1;
1089 i32 len_diff0, len_diff1;
1090 u8 error0, type0, good_l4_csum0, is_tcp_udp0;
1091 u8 error1, type1, good_l4_csum1, is_tcp_udp1;
1092 u32 udp_offset0, udp_offset1;
1094 pi0 = to_next[0] = from[0];
1095 pi1 = to_next[1] = from[1];
1099 n_left_to_next -= 2;
1101 error0 = error1 = IP6_ERROR_UNKNOWN_PROTOCOL;
1103 p0 = vlib_get_buffer (vm, pi0);
1104 p1 = vlib_get_buffer (vm, pi1);
1106 ip0 = vlib_buffer_get_current (p0);
1107 ip1 = vlib_buffer_get_current (p1);
1109 if (head_of_feature_arc == 0)
1112 vnet_buffer (p0)->l3_hdr_offset = p0->current_data;
1113 vnet_buffer (p1)->l3_hdr_offset = p1->current_data;
1115 type0 = lm->builtin_protocol_by_ip_protocol[ip0->protocol];
1116 type1 = lm->builtin_protocol_by_ip_protocol[ip1->protocol];
1121 is_tcp_udp0 = ip6_next_proto_is_tcp_udp (p0, ip0, &udp_offset0);
1122 is_tcp_udp1 = ip6_next_proto_is_tcp_udp (p1, ip1, &udp_offset1);
1124 good_l4_csum0 = (flags0 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT
1125 || (flags0 & VNET_BUFFER_F_OFFLOAD_TCP_CKSUM
1126 || flags0 & VNET_BUFFER_F_OFFLOAD_UDP_CKSUM))
1128 good_l4_csum1 = (flags1 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT
1129 || (flags1 & VNET_BUFFER_F_OFFLOAD_TCP_CKSUM
1130 || flags1 & VNET_BUFFER_F_OFFLOAD_UDP_CKSUM))
1135 if (PREDICT_TRUE (is_tcp_udp0))
1137 udp0 = (udp_header_t *) ((u8 *) ip0 + udp_offset0);
1138 /* Don't verify UDP checksum for packets with explicit zero checksum. */
1139 good_l4_csum0 |= type0 == IP_BUILTIN_PROTOCOL_UDP
1140 && udp0->checksum == 0;
1141 /* Verify UDP length. */
1142 if (is_tcp_udp0 == IP_PROTOCOL_UDP)
1144 ip_len0 = clib_net_to_host_u16 (ip0->payload_length);
1145 udp_len0 = clib_net_to_host_u16 (udp0->length);
1146 len_diff0 = ip_len0 - udp_len0;
1149 if (PREDICT_TRUE (is_tcp_udp1))
1151 udp1 = (udp_header_t *) ((u8 *) ip1 + udp_offset1);
1152 /* Don't verify UDP checksum for packets with explicit zero checksum. */
1153 good_l4_csum1 |= type1 == IP_BUILTIN_PROTOCOL_UDP
1154 && udp1->checksum == 0;
1155 /* Verify UDP length. */
1156 if (is_tcp_udp1 == IP_PROTOCOL_UDP)
1158 ip_len1 = clib_net_to_host_u16 (ip1->payload_length);
1159 udp_len1 = clib_net_to_host_u16 (udp1->length);
1160 len_diff1 = ip_len1 - udp_len1;
1164 good_l4_csum0 |= type0 == IP_BUILTIN_PROTOCOL_UNKNOWN;
1165 good_l4_csum1 |= type1 == IP_BUILTIN_PROTOCOL_UNKNOWN;
1167 len_diff0 = type0 == IP_BUILTIN_PROTOCOL_UDP ? len_diff0 : 0;
1168 len_diff1 = type1 == IP_BUILTIN_PROTOCOL_UDP ? len_diff1 : 0;
1170 if (PREDICT_FALSE (type0 != IP_BUILTIN_PROTOCOL_UNKNOWN
1173 VNET_BUFFER_F_L4_CHECKSUM_COMPUTED)))
1175 flags0 = ip6_tcp_udp_icmp_validate_checksum (vm, p0);
1177 (flags0 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0;
1179 if (PREDICT_FALSE (type1 != IP_BUILTIN_PROTOCOL_UNKNOWN
1182 VNET_BUFFER_F_L4_CHECKSUM_COMPUTED)))
1184 flags1 = ip6_tcp_udp_icmp_validate_checksum (vm, p1);
1186 (flags1 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0;
1189 error0 = error1 = IP6_ERROR_UNKNOWN_PROTOCOL;
1190 error0 = len_diff0 < 0 ? IP6_ERROR_UDP_LENGTH : error0;
1191 error1 = len_diff1 < 0 ? IP6_ERROR_UDP_LENGTH : error1;
1193 ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_UDP ==
1194 IP6_ERROR_UDP_CHECKSUM);
1195 ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_ICMP ==
1196 IP6_ERROR_ICMP_CHECKSUM);
1197 error0 = (!good_l4_csum0 ? IP6_ERROR_UDP_CHECKSUM + type0 : error0);
1198 error1 = (!good_l4_csum1 ? IP6_ERROR_UDP_CHECKSUM + type1 : error1);
1200 /* Drop packets from unroutable hosts. */
1201 /* If this is a neighbor solicitation (ICMP), skip source RPF check */
1202 if (error0 == IP6_ERROR_UNKNOWN_PROTOCOL &&
1203 type0 != IP_BUILTIN_PROTOCOL_ICMP &&
1204 !ip6_address_is_link_local_unicast (&ip0->src_address))
1206 error0 = (!ip6_urpf_loose_check (im, p0, ip0)
1207 ? IP6_ERROR_SRC_LOOKUP_MISS : error0);
1209 if (error1 == IP6_ERROR_UNKNOWN_PROTOCOL &&
1210 type1 != IP_BUILTIN_PROTOCOL_ICMP &&
1211 !ip6_address_is_link_local_unicast (&ip1->src_address))
1213 error1 = (!ip6_urpf_loose_check (im, p1, ip1)
1214 ? IP6_ERROR_SRC_LOOKUP_MISS : error1);
1217 vnet_buffer (p0)->ip.fib_index =
1218 vnet_buffer (p0)->sw_if_index[VLIB_TX] != ~0 ?
1219 vnet_buffer (p0)->sw_if_index[VLIB_TX] :
1220 vnet_buffer (p0)->ip.fib_index;
1222 vnet_buffer (p1)->ip.fib_index =
1223 vnet_buffer (p1)->sw_if_index[VLIB_TX] != ~0 ?
1224 vnet_buffer (p1)->sw_if_index[VLIB_TX] :
1225 vnet_buffer (p1)->ip.fib_index;
1229 next0 = lm->local_next_by_ip_protocol[ip0->protocol];
1230 next1 = lm->local_next_by_ip_protocol[ip1->protocol];
1233 error0 != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next0;
1235 error1 != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next1;
1237 p0->error = error_node->errors[error0];
1238 p1->error = error_node->errors[error1];
1240 if (head_of_feature_arc)
1242 if (PREDICT_TRUE (error0 == (u8) IP6_ERROR_UNKNOWN_PROTOCOL))
1243 vnet_feature_arc_start (arc_index,
1244 vnet_buffer (p0)->sw_if_index
1245 [VLIB_RX], &next0, p0);
1246 if (PREDICT_TRUE (error1 == (u8) IP6_ERROR_UNKNOWN_PROTOCOL))
1247 vnet_feature_arc_start (arc_index,
1248 vnet_buffer (p1)->sw_if_index
1249 [VLIB_RX], &next1, p1);
1252 vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
1253 to_next, n_left_to_next,
1254 pi0, pi1, next0, next1);
1257 while (n_left_from > 0 && n_left_to_next > 0)
1262 u32 pi0, ip_len0, udp_len0, flags0, next0;
1264 u8 error0, type0, good_l4_csum0;
1268 pi0 = to_next[0] = from[0];
1272 n_left_to_next -= 1;
1274 error0 = IP6_ERROR_UNKNOWN_PROTOCOL;
1276 p0 = vlib_get_buffer (vm, pi0);
1277 ip0 = vlib_buffer_get_current (p0);
1279 if (head_of_feature_arc == 0)
1282 vnet_buffer (p0)->l3_hdr_offset = p0->current_data;
1284 type0 = lm->builtin_protocol_by_ip_protocol[ip0->protocol];
1286 is_tcp_udp0 = ip6_next_proto_is_tcp_udp (p0, ip0, &udp_offset0);
1287 good_l4_csum0 = (flags0 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT
1288 || (flags0 & VNET_BUFFER_F_OFFLOAD_TCP_CKSUM
1289 || flags0 & VNET_BUFFER_F_OFFLOAD_UDP_CKSUM))
1293 if (PREDICT_TRUE (is_tcp_udp0))
1295 udp0 = (udp_header_t *) ((u8 *) ip0 + udp_offset0);
1296 /* Don't verify UDP checksum for packets with explicit zero
1298 good_l4_csum0 |= type0 == IP_BUILTIN_PROTOCOL_UDP
1299 && udp0->checksum == 0;
1300 /* Verify UDP length. */
1301 if (is_tcp_udp0 == IP_PROTOCOL_UDP)
1303 ip_len0 = clib_net_to_host_u16 (ip0->payload_length);
1304 udp_len0 = clib_net_to_host_u16 (udp0->length);
1305 len_diff0 = ip_len0 - udp_len0;
1309 good_l4_csum0 |= type0 == IP_BUILTIN_PROTOCOL_UNKNOWN;
1310 len_diff0 = type0 == IP_BUILTIN_PROTOCOL_UDP ? len_diff0 : 0;
1312 if (PREDICT_FALSE (type0 != IP_BUILTIN_PROTOCOL_UNKNOWN
1315 VNET_BUFFER_F_L4_CHECKSUM_COMPUTED)))
1317 flags0 = ip6_tcp_udp_icmp_validate_checksum (vm, p0);
1319 (flags0 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0;
1322 error0 = IP6_ERROR_UNKNOWN_PROTOCOL;
1323 error0 = len_diff0 < 0 ? IP6_ERROR_UDP_LENGTH : error0;
1325 ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_UDP ==
1326 IP6_ERROR_UDP_CHECKSUM);
1327 ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_ICMP ==
1328 IP6_ERROR_ICMP_CHECKSUM);
1329 error0 = (!good_l4_csum0 ? IP6_ERROR_UDP_CHECKSUM + type0 : error0);
1331 /* If this is a neighbor solicitation (ICMP), skip src RPF check */
1332 if (error0 == IP6_ERROR_UNKNOWN_PROTOCOL &&
1333 type0 != IP_BUILTIN_PROTOCOL_ICMP &&
1334 !ip6_address_is_link_local_unicast (&ip0->src_address))
1336 error0 = (!ip6_urpf_loose_check (im, p0, ip0)
1337 ? IP6_ERROR_SRC_LOOKUP_MISS : error0);
1340 vnet_buffer (p0)->ip.fib_index =
1341 vnet_buffer (p0)->sw_if_index[VLIB_TX] != ~0 ?
1342 vnet_buffer (p0)->sw_if_index[VLIB_TX] :
1343 vnet_buffer (p0)->ip.fib_index;
1347 next0 = lm->local_next_by_ip_protocol[ip0->protocol];
1349 error0 != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next0;
1351 p0->error = error_node->errors[error0];
1353 if (head_of_feature_arc)
1355 if (PREDICT_TRUE (error0 == (u8) IP6_ERROR_UNKNOWN_PROTOCOL))
1356 vnet_feature_arc_start (arc_index,
1357 vnet_buffer (p0)->sw_if_index
1358 [VLIB_RX], &next0, p0);
1361 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1362 to_next, n_left_to_next,
1366 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1369 return frame->n_vectors;
1373 ip6_local (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
1375 return ip6_local_inline (vm, node, frame, 1 /* head of feature arc */ );
1379 VLIB_REGISTER_NODE (ip6_local_node, static) =
1381 .function = ip6_local,
1382 .name = "ip6-local",
1383 .vector_size = sizeof (u32),
1384 .format_trace = format_ip6_forward_next_trace,
1385 .n_next_nodes = IP_LOCAL_N_NEXT,
1388 [IP_LOCAL_NEXT_DROP] = "ip6-drop",
1389 [IP_LOCAL_NEXT_PUNT] = "ip6-punt",
1390 [IP_LOCAL_NEXT_UDP_LOOKUP] = "ip6-udp-lookup",
1391 [IP_LOCAL_NEXT_ICMP] = "ip6-icmp-input",
1396 VLIB_NODE_FUNCTION_MULTIARCH (ip6_local_node, ip6_local);
1400 ip6_local_end_of_arc (vlib_main_t * vm,
1401 vlib_node_runtime_t * node, vlib_frame_t * frame)
1403 return ip6_local_inline (vm, node, frame, 0 /* head of feature arc */ );
1407 VLIB_REGISTER_NODE (ip6_local_end_of_arc_node,static) = {
1408 .function = ip6_local_end_of_arc,
1409 .name = "ip6-local-end-of-arc",
1410 .vector_size = sizeof (u32),
1412 .format_trace = format_ip6_forward_next_trace,
1413 .sibling_of = "ip6-local",
1416 VLIB_NODE_FUNCTION_MULTIARCH (ip6_local_end_of_arc_node, ip6_local_end_of_arc)
1418 VNET_FEATURE_INIT (ip6_local_end_of_arc, static) = {
1419 .arc_name = "ip6-local",
1420 .node_name = "ip6-local-end-of-arc",
1421 .runs_before = 0, /* not before any other features */
1426 ip6_register_protocol (u32 protocol, u32 node_index)
1428 vlib_main_t *vm = vlib_get_main ();
1429 ip6_main_t *im = &ip6_main;
1430 ip_lookup_main_t *lm = &im->lookup_main;
1432 ASSERT (protocol < ARRAY_LEN (lm->local_next_by_ip_protocol));
1433 lm->local_next_by_ip_protocol[protocol] =
1434 vlib_node_add_next (vm, ip6_local_node.index, node_index);
1438 ip6_probe_neighbor (vlib_main_t * vm, ip6_address_t * dst, u32 sw_if_index,
1441 vnet_main_t *vnm = vnet_get_main ();
1442 ip6_main_t *im = &ip6_main;
1443 icmp6_neighbor_solicitation_header_t *h;
1445 ip_interface_address_t *ia;
1446 ip_adjacency_t *adj;
1447 vnet_hw_interface_t *hi;
1448 vnet_sw_interface_t *si;
1454 si = vnet_get_sw_interface (vnm, sw_if_index);
1456 if (!(si->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP))
1458 return clib_error_return (0, "%U: interface %U down",
1459 format_ip6_address, dst,
1460 format_vnet_sw_if_index_name, vnm,
1465 ip6_interface_address_matching_destination (im, dst, sw_if_index, &ia);
1468 vnm->api_errno = VNET_API_ERROR_NO_MATCHING_INTERFACE;
1469 return clib_error_return
1470 (0, "no matching interface address for destination %U (interface %U)",
1471 format_ip6_address, dst,
1472 format_vnet_sw_if_index_name, vnm, sw_if_index);
1476 vlib_packet_template_get_packet (vm,
1477 &im->discover_neighbor_packet_template,
1480 return clib_error_return (0, "ICMP6 NS packet allocation failed");
1482 hi = vnet_get_sup_hw_interface (vnm, sw_if_index);
1484 /* Destination address is a solicited node multicast address. We need to fill in
1485 the low 24 bits with low 24 bits of target's address. */
1486 h->ip.dst_address.as_u8[13] = dst->as_u8[13];
1487 h->ip.dst_address.as_u8[14] = dst->as_u8[14];
1488 h->ip.dst_address.as_u8[15] = dst->as_u8[15];
1490 h->ip.src_address = src[0];
1491 h->neighbor.target_address = dst[0];
1493 if (PREDICT_FALSE (!hi->hw_address))
1495 return clib_error_return (0, "%U: interface %U do not support ip probe",
1496 format_ip6_address, dst,
1497 format_vnet_sw_if_index_name, vnm,
1501 clib_memcpy (h->link_layer_option.ethernet_address, hi->hw_address,
1502 vec_len (hi->hw_address));
1504 h->neighbor.icmp.checksum =
1505 ip6_tcp_udp_icmp_compute_checksum (vm, 0, &h->ip, &bogus_length);
1506 ASSERT (bogus_length == 0);
1508 b = vlib_get_buffer (vm, bi);
1509 vnet_buffer (b)->sw_if_index[VLIB_RX] =
1510 vnet_buffer (b)->sw_if_index[VLIB_TX] = sw_if_index;
1512 /* Add encapsulation string for software interface (e.g. ethernet header). */
1513 ip46_address_t nh = {
1517 ai = adj_nbr_add_or_lock (FIB_PROTOCOL_IP6,
1518 VNET_LINK_IP6, &nh, sw_if_index);
1521 /* Peer has been previously resolved, retrieve glean adj instead */
1522 if (adj->lookup_next_index == IP_LOOKUP_NEXT_REWRITE && refresh == 0)
1525 ai = adj_glean_add_or_lock (FIB_PROTOCOL_IP6,
1526 VNET_LINK_IP6, sw_if_index, &nh);
1530 vnet_rewrite_one_header (adj[0], h, sizeof (ethernet_header_t));
1531 vlib_buffer_advance (b, -adj->rewrite_header.data_bytes);
1534 vlib_frame_t *f = vlib_get_frame_to_node (vm, hi->output_node_index);
1535 u32 *to_next = vlib_frame_vector_args (f);
1538 vlib_put_frame_to_node (vm, hi->output_node_index, f);
1542 return /* no error */ 0;
1547 IP6_REWRITE_NEXT_DROP,
1548 IP6_REWRITE_NEXT_ICMP_ERROR,
1549 IP6_REWRITE_NEXT_FRAGMENT,
1550 IP6_REWRITE_N_NEXT /* Last */
1551 } ip6_rewrite_next_t;
1554 * This bits of an IPv6 address to mask to construct a multicast
1557 #define IP6_MCAST_ADDR_MASK 0xffffffff
1560 ip6_mtu_check (vlib_buffer_t * b, u16 packet_bytes,
1561 u16 adj_packet_bytes, bool is_locally_generated,
1562 u32 * next, u32 * error)
1564 if (adj_packet_bytes >= 1280 && packet_bytes > adj_packet_bytes)
1566 if (is_locally_generated)
1568 /* IP fragmentation */
1569 ip_frag_set_vnet_buffer (b, adj_packet_bytes,
1570 IP6_FRAG_NEXT_IP6_REWRITE, 0);
1571 *next = IP6_REWRITE_NEXT_FRAGMENT;
1572 *error = IP6_ERROR_MTU_EXCEEDED;
1576 *error = IP6_ERROR_MTU_EXCEEDED;
1577 icmp6_error_set_vnet_buffer (b, ICMP6_packet_too_big, 0,
1579 *next = IP6_REWRITE_NEXT_ICMP_ERROR;
1585 ip6_rewrite_inline (vlib_main_t * vm,
1586 vlib_node_runtime_t * node,
1587 vlib_frame_t * frame,
1588 int do_counters, int is_midchain, int is_mcast)
1590 ip_lookup_main_t *lm = &ip6_main.lookup_main;
1591 u32 *from = vlib_frame_vector_args (frame);
1592 u32 n_left_from, n_left_to_next, *to_next, next_index;
1593 vlib_node_runtime_t *error_node =
1594 vlib_node_get_runtime (vm, ip6_input_node.index);
1596 n_left_from = frame->n_vectors;
1597 next_index = node->cached_next_index;
1598 u32 thread_index = vm->thread_index;
1600 while (n_left_from > 0)
1602 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1604 while (n_left_from >= 4 && n_left_to_next >= 2)
1606 ip_adjacency_t *adj0, *adj1;
1607 vlib_buffer_t *p0, *p1;
1608 ip6_header_t *ip0, *ip1;
1609 u32 pi0, rw_len0, next0, error0, adj_index0;
1610 u32 pi1, rw_len1, next1, error1, adj_index1;
1611 u32 tx_sw_if_index0, tx_sw_if_index1;
1612 bool is_locally_originated0, is_locally_originated1;
1614 /* Prefetch next iteration. */
1616 vlib_buffer_t *p2, *p3;
1618 p2 = vlib_get_buffer (vm, from[2]);
1619 p3 = vlib_get_buffer (vm, from[3]);
1621 vlib_prefetch_buffer_header (p2, LOAD);
1622 vlib_prefetch_buffer_header (p3, LOAD);
1624 CLIB_PREFETCH (p2->pre_data, 32, STORE);
1625 CLIB_PREFETCH (p3->pre_data, 32, STORE);
1627 CLIB_PREFETCH (p2->data, sizeof (ip0[0]), STORE);
1628 CLIB_PREFETCH (p3->data, sizeof (ip0[0]), STORE);
1631 pi0 = to_next[0] = from[0];
1632 pi1 = to_next[1] = from[1];
1637 n_left_to_next -= 2;
1639 p0 = vlib_get_buffer (vm, pi0);
1640 p1 = vlib_get_buffer (vm, pi1);
1642 adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
1643 adj_index1 = vnet_buffer (p1)->ip.adj_index[VLIB_TX];
1645 ip0 = vlib_buffer_get_current (p0);
1646 ip1 = vlib_buffer_get_current (p1);
1648 error0 = error1 = IP6_ERROR_NONE;
1649 next0 = next1 = IP6_REWRITE_NEXT_DROP;
1651 is_locally_originated0 =
1652 p0->flags & VNET_BUFFER_F_LOCALLY_ORIGINATED;
1653 if (PREDICT_TRUE (!is_locally_originated0))
1655 i32 hop_limit0 = ip0->hop_limit;
1657 /* Input node should have reject packets with hop limit 0. */
1658 ASSERT (ip0->hop_limit > 0);
1662 ip0->hop_limit = hop_limit0;
1665 * If the hop count drops below 1 when forwarding, generate
1668 if (PREDICT_FALSE (hop_limit0 <= 0))
1670 error0 = IP6_ERROR_TIME_EXPIRED;
1671 next0 = IP6_REWRITE_NEXT_ICMP_ERROR;
1672 vnet_buffer (p0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
1673 icmp6_error_set_vnet_buffer (p0, ICMP6_time_exceeded,
1674 ICMP6_time_exceeded_ttl_exceeded_in_transit,
1680 p0->flags &= ~VNET_BUFFER_F_LOCALLY_ORIGINATED;
1682 is_locally_originated1 =
1683 p1->flags & VNET_BUFFER_F_LOCALLY_ORIGINATED;
1684 if (PREDICT_TRUE (!is_locally_originated1))
1686 i32 hop_limit1 = ip1->hop_limit;
1688 /* Input node should have reject packets with hop limit 0. */
1689 ASSERT (ip1->hop_limit > 0);
1693 ip1->hop_limit = hop_limit1;
1696 * If the hop count drops below 1 when forwarding, generate
1699 if (PREDICT_FALSE (hop_limit1 <= 0))
1701 error1 = IP6_ERROR_TIME_EXPIRED;
1702 next1 = IP6_REWRITE_NEXT_ICMP_ERROR;
1703 vnet_buffer (p1)->sw_if_index[VLIB_TX] = (u32) ~ 0;
1704 icmp6_error_set_vnet_buffer (p1, ICMP6_time_exceeded,
1705 ICMP6_time_exceeded_ttl_exceeded_in_transit,
1711 p1->flags &= ~VNET_BUFFER_F_LOCALLY_ORIGINATED;
1713 adj0 = adj_get (adj_index0);
1714 adj1 = adj_get (adj_index1);
1716 rw_len0 = adj0[0].rewrite_header.data_bytes;
1717 rw_len1 = adj1[0].rewrite_header.data_bytes;
1718 vnet_buffer (p0)->ip.save_rewrite_length = rw_len0;
1719 vnet_buffer (p1)->ip.save_rewrite_length = rw_len1;
1723 vlib_increment_combined_counter
1724 (&adjacency_counters,
1725 thread_index, adj_index0, 1,
1726 vlib_buffer_length_in_chain (vm, p0) + rw_len0);
1727 vlib_increment_combined_counter
1728 (&adjacency_counters,
1729 thread_index, adj_index1, 1,
1730 vlib_buffer_length_in_chain (vm, p1) + rw_len1);
1733 /* Check MTU of outgoing interface. */
1734 ip6_mtu_check (p0, clib_net_to_host_u16 (ip0->payload_length) +
1735 sizeof (ip6_header_t),
1736 adj0[0].rewrite_header.max_l3_packet_bytes,
1737 is_locally_originated0, &next0, &error0);
1738 ip6_mtu_check (p1, clib_net_to_host_u16 (ip1->payload_length) +
1739 sizeof (ip6_header_t),
1740 adj1[0].rewrite_header.max_l3_packet_bytes,
1741 is_locally_originated1, &next1, &error1);
1743 /* Don't adjust the buffer for hop count issue; icmp-error node
1744 * wants to see the IP headerr */
1745 if (PREDICT_TRUE (error0 == IP6_ERROR_NONE))
1747 p0->current_data -= rw_len0;
1748 p0->current_length += rw_len0;
1750 tx_sw_if_index0 = adj0[0].rewrite_header.sw_if_index;
1751 vnet_buffer (p0)->sw_if_index[VLIB_TX] = tx_sw_if_index0;
1752 next0 = adj0[0].rewrite_header.next_index;
1755 (adj0[0].rewrite_header.flags & VNET_REWRITE_HAS_FEATURES))
1756 vnet_feature_arc_start (lm->output_feature_arc_index,
1757 tx_sw_if_index0, &next0, p0);
1759 if (PREDICT_TRUE (error1 == IP6_ERROR_NONE))
1761 p1->current_data -= rw_len1;
1762 p1->current_length += rw_len1;
1764 tx_sw_if_index1 = adj1[0].rewrite_header.sw_if_index;
1765 vnet_buffer (p1)->sw_if_index[VLIB_TX] = tx_sw_if_index1;
1766 next1 = adj1[0].rewrite_header.next_index;
1769 (adj1[0].rewrite_header.flags & VNET_REWRITE_HAS_FEATURES))
1770 vnet_feature_arc_start (lm->output_feature_arc_index,
1771 tx_sw_if_index1, &next1, p1);
1774 /* Guess we are only writing on simple Ethernet header. */
1775 vnet_rewrite_two_headers (adj0[0], adj1[0],
1776 ip0, ip1, sizeof (ethernet_header_t));
1780 adj0->sub_type.midchain.fixup_func
1781 (vm, adj0, p0, adj0->sub_type.midchain.fixup_data);
1782 adj1->sub_type.midchain.fixup_func
1783 (vm, adj1, p1, adj1->sub_type.midchain.fixup_data);
1788 * copy bytes from the IP address into the MAC rewrite
1790 vnet_ip_mcast_fixup_header (IP6_MCAST_ADDR_MASK,
1792 rewrite_header.dst_mcast_offset,
1793 &ip0->dst_address.as_u32[3],
1795 vnet_ip_mcast_fixup_header (IP6_MCAST_ADDR_MASK,
1797 rewrite_header.dst_mcast_offset,
1798 &ip1->dst_address.as_u32[3],
1802 vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
1803 to_next, n_left_to_next,
1804 pi0, pi1, next0, next1);
1807 while (n_left_from > 0 && n_left_to_next > 0)
1809 ip_adjacency_t *adj0;
1813 u32 adj_index0, next0, error0;
1814 u32 tx_sw_if_index0;
1815 bool is_locally_originated0;
1817 pi0 = to_next[0] = from[0];
1819 p0 = vlib_get_buffer (vm, pi0);
1821 adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
1823 adj0 = adj_get (adj_index0);
1825 ip0 = vlib_buffer_get_current (p0);
1827 error0 = IP6_ERROR_NONE;
1828 next0 = IP6_REWRITE_NEXT_DROP;
1830 /* Check hop limit */
1831 is_locally_originated0 =
1832 p0->flags & VNET_BUFFER_F_LOCALLY_ORIGINATED;
1833 if (PREDICT_TRUE (!is_locally_originated0))
1835 i32 hop_limit0 = ip0->hop_limit;
1837 ASSERT (ip0->hop_limit > 0);
1841 ip0->hop_limit = hop_limit0;
1843 if (PREDICT_FALSE (hop_limit0 <= 0))
1846 * If the hop count drops below 1 when forwarding, generate
1849 error0 = IP6_ERROR_TIME_EXPIRED;
1850 next0 = IP6_REWRITE_NEXT_ICMP_ERROR;
1851 vnet_buffer (p0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
1852 icmp6_error_set_vnet_buffer (p0, ICMP6_time_exceeded,
1853 ICMP6_time_exceeded_ttl_exceeded_in_transit,
1859 p0->flags &= ~VNET_BUFFER_F_LOCALLY_ORIGINATED;
1862 /* Guess we are only writing on simple Ethernet header. */
1863 vnet_rewrite_one_header (adj0[0], ip0, sizeof (ethernet_header_t));
1865 /* Update packet buffer attributes/set output interface. */
1866 rw_len0 = adj0[0].rewrite_header.data_bytes;
1867 vnet_buffer (p0)->ip.save_rewrite_length = rw_len0;
1871 vlib_increment_combined_counter
1872 (&adjacency_counters,
1873 thread_index, adj_index0, 1,
1874 vlib_buffer_length_in_chain (vm, p0) + rw_len0);
1877 /* Check MTU of outgoing interface. */
1878 ip6_mtu_check (p0, clib_net_to_host_u16 (ip0->payload_length) +
1879 sizeof (ip6_header_t),
1880 adj0[0].rewrite_header.max_l3_packet_bytes,
1881 is_locally_originated0, &next0, &error0);
1883 /* Don't adjust the buffer for hop count issue; icmp-error node
1884 * wants to see the IP header */
1885 if (PREDICT_TRUE (error0 == IP6_ERROR_NONE))
1887 p0->current_data -= rw_len0;
1888 p0->current_length += rw_len0;
1890 tx_sw_if_index0 = adj0[0].rewrite_header.sw_if_index;
1892 vnet_buffer (p0)->sw_if_index[VLIB_TX] = tx_sw_if_index0;
1893 next0 = adj0[0].rewrite_header.next_index;
1896 (adj0[0].rewrite_header.flags & VNET_REWRITE_HAS_FEATURES))
1897 vnet_feature_arc_start (lm->output_feature_arc_index,
1898 tx_sw_if_index0, &next0, p0);
1903 adj0->sub_type.midchain.fixup_func
1904 (vm, adj0, p0, adj0->sub_type.midchain.fixup_data);
1908 vnet_ip_mcast_fixup_header (IP6_MCAST_ADDR_MASK,
1910 rewrite_header.dst_mcast_offset,
1911 &ip0->dst_address.as_u32[3],
1915 p0->error = error_node->errors[error0];
1920 n_left_to_next -= 1;
1922 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1923 to_next, n_left_to_next,
1927 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1930 /* Need to do trace after rewrites to pick up new packet data. */
1931 if (node->flags & VLIB_NODE_FLAG_TRACE)
1932 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
1934 return frame->n_vectors;
1938 ip6_rewrite (vlib_main_t * vm,
1939 vlib_node_runtime_t * node, vlib_frame_t * frame)
1941 if (adj_are_counters_enabled ())
1942 return ip6_rewrite_inline (vm, node, frame, 1, 0, 0);
1944 return ip6_rewrite_inline (vm, node, frame, 0, 0, 0);
1948 ip6_rewrite_bcast (vlib_main_t * vm,
1949 vlib_node_runtime_t * node, vlib_frame_t * frame)
1951 if (adj_are_counters_enabled ())
1952 return ip6_rewrite_inline (vm, node, frame, 1, 0, 0);
1954 return ip6_rewrite_inline (vm, node, frame, 0, 0, 0);
1958 ip6_rewrite_mcast (vlib_main_t * vm,
1959 vlib_node_runtime_t * node, vlib_frame_t * frame)
1961 if (adj_are_counters_enabled ())
1962 return ip6_rewrite_inline (vm, node, frame, 1, 0, 1);
1964 return ip6_rewrite_inline (vm, node, frame, 0, 0, 1);
1968 ip6_midchain (vlib_main_t * vm,
1969 vlib_node_runtime_t * node, vlib_frame_t * frame)
1971 if (adj_are_counters_enabled ())
1972 return ip6_rewrite_inline (vm, node, frame, 1, 1, 0);
1974 return ip6_rewrite_inline (vm, node, frame, 0, 1, 0);
1978 ip6_mcast_midchain (vlib_main_t * vm,
1979 vlib_node_runtime_t * node, vlib_frame_t * frame)
1981 if (adj_are_counters_enabled ())
1982 return ip6_rewrite_inline (vm, node, frame, 1, 1, 1);
1984 return ip6_rewrite_inline (vm, node, frame, 0, 1, 1);
1988 VLIB_REGISTER_NODE (ip6_midchain_node) =
1990 .function = ip6_midchain,
1991 .name = "ip6-midchain",
1992 .vector_size = sizeof (u32),
1993 .format_trace = format_ip6_forward_next_trace,
1994 .sibling_of = "ip6-rewrite",
1997 VLIB_NODE_FUNCTION_MULTIARCH (ip6_midchain_node, ip6_midchain);
1999 VLIB_REGISTER_NODE (ip6_rewrite_node) =
2001 .function = ip6_rewrite,
2002 .name = "ip6-rewrite",
2003 .vector_size = sizeof (u32),
2004 .format_trace = format_ip6_rewrite_trace,
2005 .n_next_nodes = IP6_REWRITE_N_NEXT,
2008 [IP6_REWRITE_NEXT_DROP] = "ip6-drop",
2009 [IP6_REWRITE_NEXT_ICMP_ERROR] = "ip6-icmp-error",
2010 [IP6_REWRITE_NEXT_FRAGMENT] = "ip6-frag",
2014 VLIB_NODE_FUNCTION_MULTIARCH (ip6_rewrite_node, ip6_rewrite);
2016 VLIB_REGISTER_NODE (ip6_rewrite_bcast_node) = {
2017 .function = ip6_rewrite_bcast,
2018 .name = "ip6-rewrite-bcast",
2019 .vector_size = sizeof (u32),
2021 .format_trace = format_ip6_rewrite_trace,
2022 .sibling_of = "ip6-rewrite",
2024 VLIB_NODE_FUNCTION_MULTIARCH (ip6_rewrite_bcast_node, ip6_rewrite_bcast)
2026 VLIB_REGISTER_NODE (ip6_rewrite_mcast_node) =
2028 .function = ip6_rewrite_mcast,
2029 .name = "ip6-rewrite-mcast",
2030 .vector_size = sizeof (u32),
2031 .format_trace = format_ip6_rewrite_trace,
2032 .sibling_of = "ip6-rewrite",
2035 VLIB_NODE_FUNCTION_MULTIARCH (ip6_rewrite_mcast_node, ip6_rewrite_mcast);
2037 VLIB_REGISTER_NODE (ip6_mcast_midchain_node, static) =
2039 .function = ip6_mcast_midchain,
2040 .name = "ip6-mcast-midchain",
2041 .vector_size = sizeof (u32),
2042 .format_trace = format_ip6_rewrite_trace,
2043 .sibling_of = "ip6-rewrite",
2046 VLIB_NODE_FUNCTION_MULTIARCH (ip6_mcast_midchain_node, ip6_mcast_midchain);
2050 * Hop-by-Hop handling
2052 ip6_hop_by_hop_main_t ip6_hop_by_hop_main;
2054 #define foreach_ip6_hop_by_hop_error \
2055 _(PROCESSED, "pkts with ip6 hop-by-hop options") \
2056 _(FORMAT, "incorrectly formatted hop-by-hop options") \
2057 _(UNKNOWN_OPTION, "unknown ip6 hop-by-hop options")
2062 #define _(sym,str) IP6_HOP_BY_HOP_ERROR_##sym,
2063 foreach_ip6_hop_by_hop_error
2065 IP6_HOP_BY_HOP_N_ERROR,
2066 } ip6_hop_by_hop_error_t;
2070 * Primary h-b-h handler trace support
2071 * We work pretty hard on the problem for obvious reasons
2077 u8 option_data[256];
2078 } ip6_hop_by_hop_trace_t;
2080 vlib_node_registration_t ip6_hop_by_hop_node;
2082 static char *ip6_hop_by_hop_error_strings[] = {
2083 #define _(sym,string) string,
2084 foreach_ip6_hop_by_hop_error
2089 format_ip6_hop_by_hop_ext_hdr (u8 * s, va_list * args)
2091 ip6_hop_by_hop_header_t *hbh0 = va_arg (*args, ip6_hop_by_hop_header_t *);
2092 int total_len = va_arg (*args, int);
2093 ip6_hop_by_hop_option_t *opt0, *limit0;
2094 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2097 s = format (s, "IP6_HOP_BY_HOP: next protocol %d len %d total %d",
2098 hbh0->protocol, (hbh0->length + 1) << 3, total_len);
2100 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2101 limit0 = (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 + total_len);
2103 while (opt0 < limit0)
2108 case 0: /* Pad, just stop */
2109 opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0 + 1);
2113 if (hm->trace[type0])
2115 s = (*hm->trace[type0]) (s, opt0);
2120 format (s, "\n unrecognized option %d length %d", type0,
2124 (ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length +
2125 sizeof (ip6_hop_by_hop_option_t));
2133 format_ip6_hop_by_hop_trace (u8 * s, va_list * args)
2135 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
2136 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
2137 ip6_hop_by_hop_trace_t *t = va_arg (*args, ip6_hop_by_hop_trace_t *);
2138 ip6_hop_by_hop_header_t *hbh0;
2139 ip6_hop_by_hop_option_t *opt0, *limit0;
2140 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2144 hbh0 = (ip6_hop_by_hop_header_t *) t->option_data;
2146 s = format (s, "IP6_HOP_BY_HOP: next index %d len %d traced %d",
2147 t->next_index, (hbh0->length + 1) << 3, t->trace_len);
2149 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2150 limit0 = (ip6_hop_by_hop_option_t *) ((u8 *) hbh0) + t->trace_len;
2152 while (opt0 < limit0)
2157 case 0: /* Pad, just stop */
2158 opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0) + 1;
2162 if (hm->trace[type0])
2164 s = (*hm->trace[type0]) (s, opt0);
2169 format (s, "\n unrecognized option %d length %d", type0,
2173 (ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length +
2174 sizeof (ip6_hop_by_hop_option_t));
2182 ip6_scan_hbh_options (vlib_buffer_t * b0,
2184 ip6_hop_by_hop_header_t * hbh0,
2185 ip6_hop_by_hop_option_t * opt0,
2186 ip6_hop_by_hop_option_t * limit0, u32 * next0)
2188 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2192 while (opt0 < limit0)
2198 opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0) + 1;
2203 if (hm->options[type0])
2205 if ((*hm->options[type0]) (b0, ip0, opt0) < 0)
2207 error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2213 /* Unrecognized mandatory option, check the two high order bits */
2214 switch (opt0->type & HBH_OPTION_TYPE_HIGH_ORDER_BITS)
2216 case HBH_OPTION_TYPE_SKIP_UNKNOWN:
2218 case HBH_OPTION_TYPE_DISCARD_UNKNOWN:
2219 error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2220 *next0 = IP_LOOKUP_NEXT_DROP;
2222 case HBH_OPTION_TYPE_DISCARD_UNKNOWN_ICMP:
2223 error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2224 *next0 = IP_LOOKUP_NEXT_ICMP_ERROR;
2225 icmp6_error_set_vnet_buffer (b0, ICMP6_parameter_problem,
2226 ICMP6_parameter_problem_unrecognized_option,
2227 (u8 *) opt0 - (u8 *) ip0);
2229 case HBH_OPTION_TYPE_DISCARD_UNKNOWN_ICMP_NOT_MCAST:
2230 error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2231 if (!ip6_address_is_multicast (&ip0->dst_address))
2233 *next0 = IP_LOOKUP_NEXT_ICMP_ERROR;
2234 icmp6_error_set_vnet_buffer (b0,
2235 ICMP6_parameter_problem,
2236 ICMP6_parameter_problem_unrecognized_option,
2237 (u8 *) opt0 - (u8 *) ip0);
2241 *next0 = IP_LOOKUP_NEXT_DROP;
2249 (ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length +
2250 sizeof (ip6_hop_by_hop_option_t));
2256 * Process the Hop-by-Hop Options header
2259 ip6_hop_by_hop (vlib_main_t * vm,
2260 vlib_node_runtime_t * node, vlib_frame_t * frame)
2262 vlib_node_runtime_t *error_node =
2263 vlib_node_get_runtime (vm, ip6_hop_by_hop_node.index);
2264 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2265 u32 n_left_from, *from, *to_next;
2266 ip_lookup_next_t next_index;
2268 from = vlib_frame_vector_args (frame);
2269 n_left_from = frame->n_vectors;
2270 next_index = node->cached_next_index;
2272 while (n_left_from > 0)
2276 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
2278 while (n_left_from >= 4 && n_left_to_next >= 2)
2281 vlib_buffer_t *b0, *b1;
2283 ip6_header_t *ip0, *ip1;
2284 ip6_hop_by_hop_header_t *hbh0, *hbh1;
2285 ip6_hop_by_hop_option_t *opt0, *limit0, *opt1, *limit1;
2286 u8 error0 = 0, error1 = 0;
2288 /* Prefetch next iteration. */
2290 vlib_buffer_t *p2, *p3;
2292 p2 = vlib_get_buffer (vm, from[2]);
2293 p3 = vlib_get_buffer (vm, from[3]);
2295 vlib_prefetch_buffer_header (p2, LOAD);
2296 vlib_prefetch_buffer_header (p3, LOAD);
2298 CLIB_PREFETCH (p2->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
2299 CLIB_PREFETCH (p3->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
2302 /* Speculatively enqueue b0, b1 to the current next frame */
2303 to_next[0] = bi0 = from[0];
2304 to_next[1] = bi1 = from[1];
2308 n_left_to_next -= 2;
2310 b0 = vlib_get_buffer (vm, bi0);
2311 b1 = vlib_get_buffer (vm, bi1);
2313 /* Default use the next_index from the adjacency. A HBH option rarely redirects to a different node */
2314 u32 adj_index0 = vnet_buffer (b0)->ip.adj_index[VLIB_TX];
2315 ip_adjacency_t *adj0 = adj_get (adj_index0);
2316 u32 adj_index1 = vnet_buffer (b1)->ip.adj_index[VLIB_TX];
2317 ip_adjacency_t *adj1 = adj_get (adj_index1);
2319 /* Default use the next_index from the adjacency. A HBH option rarely redirects to a different node */
2320 next0 = adj0->lookup_next_index;
2321 next1 = adj1->lookup_next_index;
2323 ip0 = vlib_buffer_get_current (b0);
2324 ip1 = vlib_buffer_get_current (b1);
2325 hbh0 = (ip6_hop_by_hop_header_t *) (ip0 + 1);
2326 hbh1 = (ip6_hop_by_hop_header_t *) (ip1 + 1);
2327 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2328 opt1 = (ip6_hop_by_hop_option_t *) (hbh1 + 1);
2330 (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 +
2331 ((hbh0->length + 1) << 3));
2333 (ip6_hop_by_hop_option_t *) ((u8 *) hbh1 +
2334 ((hbh1->length + 1) << 3));
2337 * Basic validity checks
2339 if ((hbh0->length + 1) << 3 >
2340 clib_net_to_host_u16 (ip0->payload_length))
2342 error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2343 next0 = IP_LOOKUP_NEXT_DROP;
2346 /* Scan the set of h-b-h options, process ones that we understand */
2347 error0 = ip6_scan_hbh_options (b0, ip0, hbh0, opt0, limit0, &next0);
2349 if ((hbh1->length + 1) << 3 >
2350 clib_net_to_host_u16 (ip1->payload_length))
2352 error1 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2353 next1 = IP_LOOKUP_NEXT_DROP;
2356 /* Scan the set of h-b-h options, process ones that we understand */
2357 error1 = ip6_scan_hbh_options (b1, ip1, hbh1, opt1, limit1, &next1);
2360 /* Has the classifier flagged this buffer for special treatment? */
2363 && (vnet_buffer (b0)->l2_classify.opaque_index & OI_DECAP)))
2364 next0 = hm->next_override;
2366 /* Has the classifier flagged this buffer for special treatment? */
2369 && (vnet_buffer (b1)->l2_classify.opaque_index & OI_DECAP)))
2370 next1 = hm->next_override;
2372 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)))
2374 if (b0->flags & VLIB_BUFFER_IS_TRACED)
2376 ip6_hop_by_hop_trace_t *t =
2377 vlib_add_trace (vm, node, b0, sizeof (*t));
2378 u32 trace_len = (hbh0->length + 1) << 3;
2379 t->next_index = next0;
2380 /* Capture the h-b-h option verbatim */
2383 ARRAY_LEN (t->option_data) ? trace_len :
2384 ARRAY_LEN (t->option_data);
2385 t->trace_len = trace_len;
2386 clib_memcpy (t->option_data, hbh0, trace_len);
2388 if (b1->flags & VLIB_BUFFER_IS_TRACED)
2390 ip6_hop_by_hop_trace_t *t =
2391 vlib_add_trace (vm, node, b1, sizeof (*t));
2392 u32 trace_len = (hbh1->length + 1) << 3;
2393 t->next_index = next1;
2394 /* Capture the h-b-h option verbatim */
2397 ARRAY_LEN (t->option_data) ? trace_len :
2398 ARRAY_LEN (t->option_data);
2399 t->trace_len = trace_len;
2400 clib_memcpy (t->option_data, hbh1, trace_len);
2405 b0->error = error_node->errors[error0];
2406 b1->error = error_node->errors[error1];
2408 /* verify speculative enqueue, maybe switch current next frame */
2409 vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
2410 n_left_to_next, bi0, bi1, next0,
2414 while (n_left_from > 0 && n_left_to_next > 0)
2420 ip6_hop_by_hop_header_t *hbh0;
2421 ip6_hop_by_hop_option_t *opt0, *limit0;
2424 /* Speculatively enqueue b0 to the current next frame */
2430 n_left_to_next -= 1;
2432 b0 = vlib_get_buffer (vm, bi0);
2434 * Default use the next_index from the adjacency.
2435 * A HBH option rarely redirects to a different node
2437 u32 adj_index0 = vnet_buffer (b0)->ip.adj_index[VLIB_TX];
2438 ip_adjacency_t *adj0 = adj_get (adj_index0);
2439 next0 = adj0->lookup_next_index;
2441 ip0 = vlib_buffer_get_current (b0);
2442 hbh0 = (ip6_hop_by_hop_header_t *) (ip0 + 1);
2443 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2445 (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 +
2446 ((hbh0->length + 1) << 3));
2449 * Basic validity checks
2451 if ((hbh0->length + 1) << 3 >
2452 clib_net_to_host_u16 (ip0->payload_length))
2454 error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2455 next0 = IP_LOOKUP_NEXT_DROP;
2459 /* Scan the set of h-b-h options, process ones that we understand */
2460 error0 = ip6_scan_hbh_options (b0, ip0, hbh0, opt0, limit0, &next0);
2463 /* Has the classifier flagged this buffer for special treatment? */
2466 && (vnet_buffer (b0)->l2_classify.opaque_index & OI_DECAP)))
2467 next0 = hm->next_override;
2469 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
2471 ip6_hop_by_hop_trace_t *t =
2472 vlib_add_trace (vm, node, b0, sizeof (*t));
2473 u32 trace_len = (hbh0->length + 1) << 3;
2474 t->next_index = next0;
2475 /* Capture the h-b-h option verbatim */
2478 ARRAY_LEN (t->option_data) ? trace_len :
2479 ARRAY_LEN (t->option_data);
2480 t->trace_len = trace_len;
2481 clib_memcpy (t->option_data, hbh0, trace_len);
2484 b0->error = error_node->errors[error0];
2486 /* verify speculative enqueue, maybe switch current next frame */
2487 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
2488 n_left_to_next, bi0, next0);
2490 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2492 return frame->n_vectors;
2496 VLIB_REGISTER_NODE (ip6_hop_by_hop_node) =
2498 .function = ip6_hop_by_hop,
2499 .name = "ip6-hop-by-hop",
2500 .sibling_of = "ip6-lookup",
2501 .vector_size = sizeof (u32),
2502 .format_trace = format_ip6_hop_by_hop_trace,
2503 .type = VLIB_NODE_TYPE_INTERNAL,
2504 .n_errors = ARRAY_LEN (ip6_hop_by_hop_error_strings),
2505 .error_strings = ip6_hop_by_hop_error_strings,
2510 VLIB_NODE_FUNCTION_MULTIARCH (ip6_hop_by_hop_node, ip6_hop_by_hop);
2512 static clib_error_t *
2513 ip6_hop_by_hop_init (vlib_main_t * vm)
2515 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2516 memset (hm->options, 0, sizeof (hm->options));
2517 memset (hm->trace, 0, sizeof (hm->trace));
2518 hm->next_override = IP6_LOOKUP_NEXT_POP_HOP_BY_HOP;
2522 VLIB_INIT_FUNCTION (ip6_hop_by_hop_init);
2525 ip6_hbh_set_next_override (uword next)
2527 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2529 hm->next_override = next;
2533 ip6_hbh_register_option (u8 option,
2534 int options (vlib_buffer_t * b, ip6_header_t * ip,
2535 ip6_hop_by_hop_option_t * opt),
2536 u8 * trace (u8 * s, ip6_hop_by_hop_option_t * opt))
2538 ip6_main_t *im = &ip6_main;
2539 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2541 ASSERT ((u32) option < ARRAY_LEN (hm->options));
2543 /* Already registered */
2544 if (hm->options[option])
2547 hm->options[option] = options;
2548 hm->trace[option] = trace;
2550 /* Set global variable */
2551 im->hbh_enabled = 1;
2557 ip6_hbh_unregister_option (u8 option)
2559 ip6_main_t *im = &ip6_main;
2560 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2562 ASSERT ((u32) option < ARRAY_LEN (hm->options));
2564 /* Not registered */
2565 if (!hm->options[option])
2568 hm->options[option] = NULL;
2569 hm->trace[option] = NULL;
2571 /* Disable global knob if this was the last option configured */
2574 for (i = 0; i < 256; i++)
2576 if (hm->options[option])
2583 im->hbh_enabled = 0;
2588 /* Global IP6 main. */
2589 ip6_main_t ip6_main;
2591 static clib_error_t *
2592 ip6_lookup_init (vlib_main_t * vm)
2594 ip6_main_t *im = &ip6_main;
2595 clib_error_t *error;
2598 if ((error = vlib_call_init_function (vm, vnet_feature_init)))
2601 for (i = 0; i < ARRAY_LEN (im->fib_masks); i++)
2608 for (j = 0; j < i0; j++)
2609 im->fib_masks[i].as_u32[j] = ~0;
2612 im->fib_masks[i].as_u32[i0] =
2613 clib_host_to_net_u32 (pow2_mask (i1) << (32 - i1));
2616 ip_lookup_init (&im->lookup_main, /* is_ip6 */ 1);
2618 if (im->lookup_table_nbuckets == 0)
2619 im->lookup_table_nbuckets = IP6_FIB_DEFAULT_HASH_NUM_BUCKETS;
2621 im->lookup_table_nbuckets = 1 << max_log2 (im->lookup_table_nbuckets);
2623 if (im->lookup_table_size == 0)
2624 im->lookup_table_size = IP6_FIB_DEFAULT_HASH_MEMORY_SIZE;
2626 BV (clib_bihash_init) (&(im->ip6_table[IP6_FIB_TABLE_FWDING].ip6_hash),
2627 "ip6 FIB fwding table",
2628 im->lookup_table_nbuckets, im->lookup_table_size);
2629 BV (clib_bihash_init) (&im->ip6_table[IP6_FIB_TABLE_NON_FWDING].ip6_hash,
2630 "ip6 FIB non-fwding table",
2631 im->lookup_table_nbuckets, im->lookup_table_size);
2633 /* Create FIB with index 0 and table id of 0. */
2634 fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6, 0,
2635 FIB_SOURCE_DEFAULT_ROUTE);
2636 mfib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6, 0,
2637 MFIB_SOURCE_DEFAULT_ROUTE);
2641 pn = pg_get_node (ip6_lookup_node.index);
2642 pn->unformat_edit = unformat_pg_ip6_header;
2645 /* Unless explicitly configured, don't process HBH options */
2646 im->hbh_enabled = 0;
2649 icmp6_neighbor_solicitation_header_t p;
2651 memset (&p, 0, sizeof (p));
2653 p.ip.ip_version_traffic_class_and_flow_label =
2654 clib_host_to_net_u32 (0x6 << 28);
2655 p.ip.payload_length =
2656 clib_host_to_net_u16 (sizeof (p) -
2658 (icmp6_neighbor_solicitation_header_t, neighbor));
2659 p.ip.protocol = IP_PROTOCOL_ICMP6;
2660 p.ip.hop_limit = 255;
2661 ip6_set_solicited_node_multicast_address (&p.ip.dst_address, 0);
2663 p.neighbor.icmp.type = ICMP6_neighbor_solicitation;
2665 p.link_layer_option.header.type =
2666 ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address;
2667 p.link_layer_option.header.n_data_u64s =
2668 sizeof (p.link_layer_option) / sizeof (u64);
2670 vlib_packet_template_init (vm,
2671 &im->discover_neighbor_packet_template,
2673 /* alloc chunk size */ 8,
2674 "ip6 neighbor discovery");
2680 VLIB_INIT_FUNCTION (ip6_lookup_init);
2683 ip6_link_local_address_from_ethernet_mac_address (ip6_address_t * ip,
2686 ip->as_u64[0] = clib_host_to_net_u64 (0xFE80000000000000ULL);
2687 /* Invert the "u" bit */
2688 ip->as_u8[8] = mac[0] ^ (1 << 1);
2689 ip->as_u8[9] = mac[1];
2690 ip->as_u8[10] = mac[2];
2691 ip->as_u8[11] = 0xFF;
2692 ip->as_u8[12] = 0xFE;
2693 ip->as_u8[13] = mac[3];
2694 ip->as_u8[14] = mac[4];
2695 ip->as_u8[15] = mac[5];
2699 ip6_ethernet_mac_address_from_link_local_address (u8 * mac,
2702 /* Invert the previously inverted "u" bit */
2703 mac[0] = ip->as_u8[8] ^ (1 << 1);
2704 mac[1] = ip->as_u8[9];
2705 mac[2] = ip->as_u8[10];
2706 mac[3] = ip->as_u8[13];
2707 mac[4] = ip->as_u8[14];
2708 mac[5] = ip->as_u8[15];
2711 static clib_error_t *
2712 test_ip6_link_command_fn (vlib_main_t * vm,
2713 unformat_input_t * input, vlib_cli_command_t * cmd)
2716 ip6_address_t _a, *a = &_a;
2718 if (unformat (input, "%U", unformat_ethernet_address, mac))
2720 ip6_link_local_address_from_ethernet_mac_address (a, mac);
2721 vlib_cli_output (vm, "Link local address: %U", format_ip6_address, a);
2722 ip6_ethernet_mac_address_from_link_local_address (mac, a);
2723 vlib_cli_output (vm, "Original MAC address: %U",
2724 format_ethernet_address, mac);
2731 * This command converts the given MAC Address into an IPv6 link-local
2735 * Example of how to create an IPv6 link-local address:
2736 * @cliexstart{test ip6 link 16:d9:e0:91:79:86}
2737 * Link local address: fe80::14d9:e0ff:fe91:7986
2738 * Original MAC address: 16:d9:e0:91:79:86
2742 VLIB_CLI_COMMAND (test_link_command, static) =
2744 .path = "test ip6 link",
2745 .function = test_ip6_link_command_fn,
2746 .short_help = "test ip6 link <mac-address>",
2751 vnet_set_ip6_flow_hash (u32 table_id, u32 flow_hash_config)
2755 fib_index = fib_table_find (FIB_PROTOCOL_IP6, table_id);
2757 if (~0 == fib_index)
2758 return VNET_API_ERROR_NO_SUCH_FIB;
2760 fib_table_set_flow_hash_config (fib_index, FIB_PROTOCOL_IP6,
2766 static clib_error_t *
2767 set_ip6_flow_hash_command_fn (vlib_main_t * vm,
2768 unformat_input_t * input,
2769 vlib_cli_command_t * cmd)
2773 u32 flow_hash_config = 0;
2776 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
2778 if (unformat (input, "table %d", &table_id))
2781 else if (unformat (input, #a)) { flow_hash_config |= v; matched=1;}
2782 foreach_flow_hash_bit
2789 return clib_error_return (0, "unknown input `%U'",
2790 format_unformat_error, input);
2792 rv = vnet_set_ip6_flow_hash (table_id, flow_hash_config);
2799 return clib_error_return (0, "no such FIB table %d", table_id);
2802 clib_warning ("BUG: illegal flow hash config 0x%x", flow_hash_config);
2810 * Configure the set of IPv6 fields used by the flow hash.
2814 * Example of how to set the flow hash on a given table:
2815 * @cliexcmd{set ip6 flow-hash table 8 dst sport dport proto}
2817 * Example of display the configured flow hash:
2818 * @cliexstart{show ip6 fib}
2819 * ipv6-VRF:0, fib_index 0, flow hash: src dst sport dport proto
2822 * [@0]: dpo-load-balance: [index:5 buckets:1 uRPF:5 to:[0:0]]
2823 * [0] [@0]: dpo-drop ip6
2826 * [@0]: dpo-load-balance: [index:10 buckets:1 uRPF:10 to:[0:0]]
2827 * [0] [@2]: dpo-receive
2830 * [@0]: dpo-load-balance: [index:8 buckets:1 uRPF:8 to:[0:0]]
2831 * [0] [@2]: dpo-receive
2834 * [@0]: dpo-load-balance: [index:7 buckets:1 uRPF:7 to:[0:0]]
2835 * [0] [@2]: dpo-receive
2838 * [@0]: dpo-load-balance: [index:9 buckets:1 uRPF:9 to:[0:0]]
2839 * [0] [@2]: dpo-receive
2840 * ff02::1:ff00:0/104
2842 * [@0]: dpo-load-balance: [index:6 buckets:1 uRPF:6 to:[0:0]]
2843 * [0] [@2]: dpo-receive
2844 * ipv6-VRF:8, fib_index 1, flow hash: dst sport dport proto
2847 * [@0]: dpo-load-balance: [index:21 buckets:1 uRPF:20 to:[0:0]]
2848 * [0] [@0]: dpo-drop ip6
2851 * [@0]: dpo-load-balance: [index:27 buckets:1 uRPF:26 to:[0:0]]
2852 * [0] [@4]: ipv6-glean: af_packet0
2855 * [@0]: dpo-load-balance: [index:28 buckets:1 uRPF:27 to:[0:0]]
2856 * [0] [@2]: dpo-receive: @::a:1:1:0:7 on af_packet0
2859 * [@0]: dpo-load-balance: [index:26 buckets:1 uRPF:25 to:[0:0]]
2860 * [0] [@2]: dpo-receive
2861 * fe80::fe:3eff:fe3e:9222/128
2863 * [@0]: dpo-load-balance: [index:29 buckets:1 uRPF:28 to:[0:0]]
2864 * [0] [@2]: dpo-receive: fe80::fe:3eff:fe3e:9222 on af_packet0
2867 * [@0]: dpo-load-balance: [index:24 buckets:1 uRPF:23 to:[0:0]]
2868 * [0] [@2]: dpo-receive
2871 * [@0]: dpo-load-balance: [index:23 buckets:1 uRPF:22 to:[0:0]]
2872 * [0] [@2]: dpo-receive
2875 * [@0]: dpo-load-balance: [index:25 buckets:1 uRPF:24 to:[0:0]]
2876 * [0] [@2]: dpo-receive
2877 * ff02::1:ff00:0/104
2879 * [@0]: dpo-load-balance: [index:22 buckets:1 uRPF:21 to:[0:0]]
2880 * [0] [@2]: dpo-receive
2885 VLIB_CLI_COMMAND (set_ip6_flow_hash_command, static) =
2887 .path = "set ip6 flow-hash",
2889 "set ip6 flow-hash table <table-id> [src] [dst] [sport] [dport] [proto] [reverse]",
2890 .function = set_ip6_flow_hash_command_fn,
2894 static clib_error_t *
2895 show_ip6_local_command_fn (vlib_main_t * vm,
2896 unformat_input_t * input, vlib_cli_command_t * cmd)
2898 ip6_main_t *im = &ip6_main;
2899 ip_lookup_main_t *lm = &im->lookup_main;
2902 vlib_cli_output (vm, "Protocols handled by ip6_local");
2903 for (i = 0; i < ARRAY_LEN (lm->local_next_by_ip_protocol); i++)
2905 if (lm->local_next_by_ip_protocol[i] != IP_LOCAL_NEXT_PUNT)
2908 u32 node_index = vlib_get_node (vm,
2909 ip6_local_node.index)->
2910 next_nodes[lm->local_next_by_ip_protocol[i]];
2911 vlib_cli_output (vm, "%d: %U", i, format_vlib_node_name, vm,
2921 * Display the set of protocols handled by the local IPv6 stack.
2924 * Example of how to display local protocol table:
2925 * @cliexstart{show ip6 local}
2926 * Protocols handled by ip6_local
2934 VLIB_CLI_COMMAND (show_ip6_local, static) =
2936 .path = "show ip6 local",
2937 .function = show_ip6_local_command_fn,
2938 .short_help = "show ip6 local",
2943 vnet_set_ip6_classify_intfc (vlib_main_t * vm, u32 sw_if_index,
2946 vnet_main_t *vnm = vnet_get_main ();
2947 vnet_interface_main_t *im = &vnm->interface_main;
2948 ip6_main_t *ipm = &ip6_main;
2949 ip_lookup_main_t *lm = &ipm->lookup_main;
2950 vnet_classify_main_t *cm = &vnet_classify_main;
2951 ip6_address_t *if_addr;
2953 if (pool_is_free_index (im->sw_interfaces, sw_if_index))
2954 return VNET_API_ERROR_NO_MATCHING_INTERFACE;
2956 if (table_index != ~0 && pool_is_free_index (cm->tables, table_index))
2957 return VNET_API_ERROR_NO_SUCH_ENTRY;
2959 vec_validate (lm->classify_table_index_by_sw_if_index, sw_if_index);
2960 lm->classify_table_index_by_sw_if_index[sw_if_index] = table_index;
2962 if_addr = ip6_interface_first_address (ipm, sw_if_index);
2964 if (NULL != if_addr)
2966 fib_prefix_t pfx = {
2968 .fp_proto = FIB_PROTOCOL_IP6,
2969 .fp_addr.ip6 = *if_addr,
2973 fib_index = fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4,
2977 if (table_index != (u32) ~ 0)
2979 dpo_id_t dpo = DPO_INVALID;
2984 classify_dpo_create (DPO_PROTO_IP6, table_index));
2986 fib_table_entry_special_dpo_add (fib_index,
2988 FIB_SOURCE_CLASSIFY,
2989 FIB_ENTRY_FLAG_NONE, &dpo);
2994 fib_table_entry_special_remove (fib_index,
2995 &pfx, FIB_SOURCE_CLASSIFY);
3002 static clib_error_t *
3003 set_ip6_classify_command_fn (vlib_main_t * vm,
3004 unformat_input_t * input,
3005 vlib_cli_command_t * cmd)
3007 u32 table_index = ~0;
3008 int table_index_set = 0;
3009 u32 sw_if_index = ~0;
3012 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
3014 if (unformat (input, "table-index %d", &table_index))
3015 table_index_set = 1;
3016 else if (unformat (input, "intfc %U", unformat_vnet_sw_interface,
3017 vnet_get_main (), &sw_if_index))
3023 if (table_index_set == 0)
3024 return clib_error_return (0, "classify table-index must be specified");
3026 if (sw_if_index == ~0)
3027 return clib_error_return (0, "interface / subif must be specified");
3029 rv = vnet_set_ip6_classify_intfc (vm, sw_if_index, table_index);
3036 case VNET_API_ERROR_NO_MATCHING_INTERFACE:
3037 return clib_error_return (0, "No such interface");
3039 case VNET_API_ERROR_NO_SUCH_ENTRY:
3040 return clib_error_return (0, "No such classifier table");
3046 * Assign a classification table to an interface. The classification
3047 * table is created using the '<em>classify table</em>' and '<em>classify session</em>'
3048 * commands. Once the table is create, use this command to filter packets
3052 * Example of how to assign a classification table to an interface:
3053 * @cliexcmd{set ip6 classify intfc GigabitEthernet2/0/0 table-index 1}
3056 VLIB_CLI_COMMAND (set_ip6_classify_command, static) =
3058 .path = "set ip6 classify",
3060 "set ip6 classify intfc <interface> table-index <classify-idx>",
3061 .function = set_ip6_classify_command_fn,
3065 static clib_error_t *
3066 ip6_config (vlib_main_t * vm, unformat_input_t * input)
3068 ip6_main_t *im = &ip6_main;
3073 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
3075 if (unformat (input, "hash-buckets %d", &tmp))
3077 else if (unformat (input, "heap-size %U",
3078 unformat_memory_size, &heapsize))
3081 return clib_error_return (0, "unknown input '%U'",
3082 format_unformat_error, input);
3085 im->lookup_table_nbuckets = nbuckets;
3086 im->lookup_table_size = heapsize;
3091 VLIB_EARLY_CONFIG_FUNCTION (ip6_config, "ip6");
3094 * fd.io coding-style-patch-verification: ON
3097 * eval: (c-set-style "gnu")