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;
204 ip6_address_t ll_addr;
206 /* local0 interface doesn't support IP addressing */
207 if (sw_if_index == 0)
210 clib_error_create ("local0 interface doesn't support IP addressing");
213 if (ip6_address_is_link_local_unicast (address))
215 if (address_length != 128)
217 vnm->api_errno = VNET_API_ERROR_ADDRESS_LENGTH_MISMATCH;
220 ("prefix length of link-local address must be 128");
224 return ip6_neighbor_set_link_local_address (vm, sw_if_index,
229 ll_addr = ip6_neighbor_get_link_local_address (sw_if_index);
230 if (ip6_address_is_equal (&ll_addr, address))
232 vnm->api_errno = VNET_API_ERROR_ADDRESS_NOT_DELETABLE;
233 return clib_error_create ("address not deletable");
237 vnm->api_errno = VNET_API_ERROR_ADDRESS_NOT_FOUND_FOR_INTERFACE;
238 return clib_error_create ("address not found");
243 vec_validate (im->fib_index_by_sw_if_index, sw_if_index);
244 vec_validate (im->mfib_index_by_sw_if_index, sw_if_index);
246 ip6_addr_fib_init (&ip6_af, address,
247 vec_elt (im->fib_index_by_sw_if_index, sw_if_index));
248 vec_add1 (addr_fib, ip6_af);
253 /* When adding an address check that it does not conflict
254 with an existing address on any interface in this table. */
255 ip_interface_address_t *ia;
256 vnet_sw_interface_t *sif;
258 pool_foreach(sif, vnm->interface_main.sw_interfaces,
260 if (im->fib_index_by_sw_if_index[sw_if_index] ==
261 im->fib_index_by_sw_if_index[sif->sw_if_index])
263 foreach_ip_interface_address
264 (&im->lookup_main, ia, sif->sw_if_index,
265 0 /* honor unnumbered */ ,
268 ip_interface_address_get_address
269 (&im->lookup_main, ia);
270 if (ip6_destination_matches_route
271 (im, address, x, ia->address_length) ||
272 ip6_destination_matches_route (im,
277 vnm->api_errno = VNET_API_ERROR_DUPLICATE_IF_ADDRESS;
280 ("failed to add %U which conflicts with %U for interface %U",
281 format_ip6_address_and_length, address,
283 format_ip6_address_and_length, x,
285 format_vnet_sw_if_index_name, vnm,
295 uword elts_before = pool_elts (lm->if_address_pool);
297 error = ip_interface_address_add_del
298 (lm, sw_if_index, addr_fib, address_length, is_del, &if_address_index);
302 /* Pool did not grow: add duplicate address. */
303 if (elts_before == pool_elts (lm->if_address_pool))
307 ip6_sw_interface_enable_disable (sw_if_index, !is_del);
310 ip6_del_interface_routes (im, ip6_af.fib_index, address, address_length);
312 ip6_add_interface_routes (vnm, sw_if_index,
313 im, ip6_af.fib_index,
314 pool_elt_at_index (lm->if_address_pool,
318 ip6_add_del_interface_address_callback_t *cb;
319 vec_foreach (cb, im->add_del_interface_address_callbacks)
320 cb->function (im, cb->function_opaque, sw_if_index,
321 address, address_length, if_address_index, is_del);
330 ip6_sw_interface_admin_up_down (vnet_main_t * vnm, u32 sw_if_index, u32 flags)
332 ip6_main_t *im = &ip6_main;
333 ip_interface_address_t *ia;
335 u32 is_admin_up, fib_index;
337 /* Fill in lookup tables with default table (0). */
338 vec_validate (im->fib_index_by_sw_if_index, sw_if_index);
340 vec_validate_init_empty (im->
341 lookup_main.if_address_pool_index_by_sw_if_index,
344 is_admin_up = (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) != 0;
346 fib_index = vec_elt (im->fib_index_by_sw_if_index, sw_if_index);
349 foreach_ip_interface_address (&im->lookup_main, ia, sw_if_index,
350 0 /* honor unnumbered */,
352 a = ip_interface_address_get_address (&im->lookup_main, ia);
354 ip6_add_interface_routes (vnm, sw_if_index,
358 ip6_del_interface_routes (im, fib_index,
359 a, ia->address_length);
366 VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION (ip6_sw_interface_admin_up_down);
368 /* Built-in ip6 unicast rx feature path definition */
370 VNET_FEATURE_ARC_INIT (ip6_unicast, static) =
372 .arc_name = "ip6-unicast",
373 .start_nodes = VNET_FEATURES ("ip6-input"),
374 .last_in_arc = "ip6-lookup",
375 .arc_index_ptr = &ip6_main.lookup_main.ucast_feature_arc_index,
378 VNET_FEATURE_INIT (ip6_flow_classify, static) =
380 .arc_name = "ip6-unicast",
381 .node_name = "ip6-flow-classify",
382 .runs_before = VNET_FEATURES ("ip6-inacl"),
385 VNET_FEATURE_INIT (ip6_inacl, static) =
387 .arc_name = "ip6-unicast",
388 .node_name = "ip6-inacl",
389 .runs_before = VNET_FEATURES ("ip6-policer-classify"),
392 VNET_FEATURE_INIT (ip6_policer_classify, static) =
394 .arc_name = "ip6-unicast",
395 .node_name = "ip6-policer-classify",
396 .runs_before = VNET_FEATURES ("ipsec6-input-feature"),
399 VNET_FEATURE_INIT (ip6_ipsec, static) =
401 .arc_name = "ip6-unicast",
402 .node_name = "ipsec6-input-feature",
403 .runs_before = VNET_FEATURES ("l2tp-decap"),
406 VNET_FEATURE_INIT (ip6_l2tp, static) =
408 .arc_name = "ip6-unicast",
409 .node_name = "l2tp-decap",
410 .runs_before = VNET_FEATURES ("vpath-input-ip6"),
413 VNET_FEATURE_INIT (ip6_vpath, static) =
415 .arc_name = "ip6-unicast",
416 .node_name = "vpath-input-ip6",
417 .runs_before = VNET_FEATURES ("ip6-vxlan-bypass"),
420 VNET_FEATURE_INIT (ip6_vxlan_bypass, static) =
422 .arc_name = "ip6-unicast",
423 .node_name = "ip6-vxlan-bypass",
424 .runs_before = VNET_FEATURES ("ip6-lookup"),
427 VNET_FEATURE_INIT (ip6_not_enabled, static) =
429 .arc_name = "ip6-unicast",
430 .node_name = "ip6-not-enabled",
431 .runs_before = VNET_FEATURES ("ip6-lookup"),
434 VNET_FEATURE_INIT (ip6_lookup, static) =
436 .arc_name = "ip6-unicast",
437 .node_name = "ip6-lookup",
438 .runs_before = 0, /*last feature*/
441 /* Built-in ip6 multicast rx feature path definition (none now) */
442 VNET_FEATURE_ARC_INIT (ip6_multicast, static) =
444 .arc_name = "ip6-multicast",
445 .start_nodes = VNET_FEATURES ("ip6-input"),
446 .last_in_arc = "ip6-mfib-forward-lookup",
447 .arc_index_ptr = &ip6_main.lookup_main.mcast_feature_arc_index,
450 VNET_FEATURE_INIT (ip6_vpath_mc, static) = {
451 .arc_name = "ip6-multicast",
452 .node_name = "vpath-input-ip6",
453 .runs_before = VNET_FEATURES ("ip6-mfib-forward-lookup"),
456 VNET_FEATURE_INIT (ip6_not_enabled_mc, static) = {
457 .arc_name = "ip6-multicast",
458 .node_name = "ip6-not-enabled",
459 .runs_before = VNET_FEATURES ("ip6-mfib-forward-lookup"),
462 VNET_FEATURE_INIT (ip6_mc_lookup, static) = {
463 .arc_name = "ip6-multicast",
464 .node_name = "ip6-mfib-forward-lookup",
465 .runs_before = 0, /* last feature */
468 /* Built-in ip4 tx feature path definition */
469 VNET_FEATURE_ARC_INIT (ip6_output, static) =
471 .arc_name = "ip6-output",
472 .start_nodes = VNET_FEATURES ("ip6-rewrite", "ip6-midchain", "ip6-dvr-dpo"),
473 .last_in_arc = "interface-output",
474 .arc_index_ptr = &ip6_main.lookup_main.output_feature_arc_index,
477 VNET_FEATURE_INIT (ip6_outacl, static) = {
478 .arc_name = "ip6-output",
479 .node_name = "ip6-outacl",
480 .runs_before = VNET_FEATURES ("ipsec6-output-feature"),
483 VNET_FEATURE_INIT (ip6_ipsec_output, static) = {
484 .arc_name = "ip6-output",
485 .node_name = "ipsec6-output-feature",
486 .runs_before = VNET_FEATURES ("interface-output"),
489 VNET_FEATURE_INIT (ip6_interface_output, static) = {
490 .arc_name = "ip6-output",
491 .node_name = "interface-output",
492 .runs_before = 0, /* not before any other features */
497 ip6_sw_interface_add_del (vnet_main_t * vnm, u32 sw_if_index, u32 is_add)
499 ip6_main_t *im = &ip6_main;
501 vec_validate (im->fib_index_by_sw_if_index, sw_if_index);
502 vec_validate (im->mfib_index_by_sw_if_index, sw_if_index);
506 /* Ensure that IPv6 is disabled */
507 ip6_main_t *im6 = &ip6_main;
508 ip_lookup_main_t *lm6 = &im6->lookup_main;
509 ip_interface_address_t *ia = 0;
510 ip6_address_t *address;
511 vlib_main_t *vm = vlib_get_main ();
513 ip6_neighbor_sw_interface_add_del (vnm, sw_if_index, 0 /* is_add */ );
514 vnet_sw_interface_update_unnumbered (sw_if_index, ~0, 0);
516 foreach_ip_interface_address (lm6, ia, sw_if_index, 0,
518 address = ip_interface_address_get_address (lm6, ia);
519 ip6_add_del_interface_address(vm, sw_if_index, address, ia->address_length, 1);
522 ip6_mfib_interface_enable_disable (sw_if_index, 0);
525 vnet_feature_enable_disable ("ip6-unicast", "ip6-not-enabled", sw_if_index,
528 vnet_feature_enable_disable ("ip6-multicast", "ip6-not-enabled",
529 sw_if_index, is_add, 0, 0);
531 return /* no error */ 0;
534 VNET_SW_INTERFACE_ADD_DEL_FUNCTION (ip6_sw_interface_add_del);
537 ip6_lookup (vlib_main_t * vm,
538 vlib_node_runtime_t * node, vlib_frame_t * frame)
540 return ip6_lookup_inline (vm, node, frame);
543 static u8 *format_ip6_lookup_trace (u8 * s, va_list * args);
546 VLIB_REGISTER_NODE (ip6_lookup_node) =
548 .function = ip6_lookup,
549 .name = "ip6-lookup",
550 .vector_size = sizeof (u32),
551 .format_trace = format_ip6_lookup_trace,
552 .n_next_nodes = IP6_LOOKUP_N_NEXT,
553 .next_nodes = IP6_LOOKUP_NEXT_NODES,
557 VLIB_NODE_FUNCTION_MULTIARCH (ip6_lookup_node, ip6_lookup);
560 ip6_load_balance (vlib_main_t * vm,
561 vlib_node_runtime_t * node, vlib_frame_t * frame)
563 vlib_combined_counter_main_t *cm = &load_balance_main.lbm_via_counters;
564 u32 n_left_from, n_left_to_next, *from, *to_next;
565 ip_lookup_next_t next;
566 u32 thread_index = vm->thread_index;
567 ip6_main_t *im = &ip6_main;
569 from = vlib_frame_vector_args (frame);
570 n_left_from = frame->n_vectors;
571 next = node->cached_next_index;
573 while (n_left_from > 0)
575 vlib_get_next_frame (vm, node, next, to_next, n_left_to_next);
578 while (n_left_from >= 4 && n_left_to_next >= 2)
580 ip_lookup_next_t next0, next1;
581 const load_balance_t *lb0, *lb1;
582 vlib_buffer_t *p0, *p1;
583 u32 pi0, lbi0, hc0, pi1, lbi1, hc1;
584 const ip6_header_t *ip0, *ip1;
585 const dpo_id_t *dpo0, *dpo1;
587 /* Prefetch next iteration. */
589 vlib_buffer_t *p2, *p3;
591 p2 = vlib_get_buffer (vm, from[2]);
592 p3 = vlib_get_buffer (vm, from[3]);
594 vlib_prefetch_buffer_header (p2, STORE);
595 vlib_prefetch_buffer_header (p3, STORE);
597 CLIB_PREFETCH (p2->data, sizeof (ip0[0]), STORE);
598 CLIB_PREFETCH (p3->data, sizeof (ip0[0]), STORE);
601 pi0 = to_next[0] = from[0];
602 pi1 = to_next[1] = from[1];
609 p0 = vlib_get_buffer (vm, pi0);
610 p1 = vlib_get_buffer (vm, pi1);
612 ip0 = vlib_buffer_get_current (p0);
613 ip1 = vlib_buffer_get_current (p1);
614 lbi0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
615 lbi1 = vnet_buffer (p1)->ip.adj_index[VLIB_TX];
617 lb0 = load_balance_get (lbi0);
618 lb1 = load_balance_get (lbi1);
621 * this node is for via FIBs we can re-use the hash value from the
622 * to node if present.
623 * We don't want to use the same hash value at each level in the recursion
624 * graph as that would lead to polarisation
628 if (PREDICT_FALSE (lb0->lb_n_buckets > 1))
630 if (PREDICT_TRUE (vnet_buffer (p0)->ip.flow_hash))
632 hc0 = vnet_buffer (p0)->ip.flow_hash =
633 vnet_buffer (p0)->ip.flow_hash >> 1;
637 hc0 = vnet_buffer (p0)->ip.flow_hash =
638 ip6_compute_flow_hash (ip0, lb0->lb_hash_config);
641 load_balance_get_fwd_bucket (lb0,
643 lb0->lb_n_buckets_minus_1));
647 dpo0 = load_balance_get_bucket_i (lb0, 0);
649 if (PREDICT_FALSE (lb1->lb_n_buckets > 1))
651 if (PREDICT_TRUE (vnet_buffer (p1)->ip.flow_hash))
653 hc1 = vnet_buffer (p1)->ip.flow_hash =
654 vnet_buffer (p1)->ip.flow_hash >> 1;
658 hc1 = vnet_buffer (p1)->ip.flow_hash =
659 ip6_compute_flow_hash (ip1, lb1->lb_hash_config);
662 load_balance_get_fwd_bucket (lb1,
664 lb1->lb_n_buckets_minus_1));
668 dpo1 = load_balance_get_bucket_i (lb1, 0);
671 next0 = dpo0->dpoi_next_node;
672 next1 = dpo1->dpoi_next_node;
674 /* Only process the HBH Option Header if explicitly configured to do so */
676 (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
678 next0 = (dpo_is_adj (dpo0) && im->hbh_enabled) ?
679 (ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next0;
681 /* Only process the HBH Option Header if explicitly configured to do so */
683 (ip1->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
685 next1 = (dpo_is_adj (dpo1) && im->hbh_enabled) ?
686 (ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next1;
689 vnet_buffer (p0)->ip.adj_index[VLIB_TX] = dpo0->dpoi_index;
690 vnet_buffer (p1)->ip.adj_index[VLIB_TX] = dpo1->dpoi_index;
692 vlib_increment_combined_counter
693 (cm, thread_index, lbi0, 1, vlib_buffer_length_in_chain (vm, p0));
694 vlib_increment_combined_counter
695 (cm, thread_index, lbi1, 1, vlib_buffer_length_in_chain (vm, p1));
697 vlib_validate_buffer_enqueue_x2 (vm, node, next,
698 to_next, n_left_to_next,
699 pi0, pi1, next0, next1);
702 while (n_left_from > 0 && n_left_to_next > 0)
704 ip_lookup_next_t next0;
705 const load_balance_t *lb0;
708 const ip6_header_t *ip0;
709 const dpo_id_t *dpo0;
718 p0 = vlib_get_buffer (vm, pi0);
720 ip0 = vlib_buffer_get_current (p0);
721 lbi0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
723 lb0 = load_balance_get (lbi0);
726 if (PREDICT_FALSE (lb0->lb_n_buckets > 1))
728 if (PREDICT_TRUE (vnet_buffer (p0)->ip.flow_hash))
730 hc0 = vnet_buffer (p0)->ip.flow_hash =
731 vnet_buffer (p0)->ip.flow_hash >> 1;
735 hc0 = vnet_buffer (p0)->ip.flow_hash =
736 ip6_compute_flow_hash (ip0, lb0->lb_hash_config);
739 load_balance_get_fwd_bucket (lb0,
741 lb0->lb_n_buckets_minus_1));
745 dpo0 = load_balance_get_bucket_i (lb0, 0);
748 next0 = dpo0->dpoi_next_node;
749 vnet_buffer (p0)->ip.adj_index[VLIB_TX] = dpo0->dpoi_index;
751 /* Only process the HBH Option Header if explicitly configured to do so */
753 (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
755 next0 = (dpo_is_adj (dpo0) && im->hbh_enabled) ?
756 (ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next0;
759 vlib_increment_combined_counter
760 (cm, thread_index, lbi0, 1, vlib_buffer_length_in_chain (vm, p0));
762 vlib_validate_buffer_enqueue_x1 (vm, node, next,
763 to_next, n_left_to_next,
767 vlib_put_next_frame (vm, node, next, n_left_to_next);
770 if (node->flags & VLIB_NODE_FLAG_TRACE)
771 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
773 return frame->n_vectors;
777 VLIB_REGISTER_NODE (ip6_load_balance_node) =
779 .function = ip6_load_balance,
780 .name = "ip6-load-balance",
781 .vector_size = sizeof (u32),
782 .sibling_of = "ip6-lookup",
783 .format_trace = format_ip6_lookup_trace,
787 VLIB_NODE_FUNCTION_MULTIARCH (ip6_load_balance_node, ip6_load_balance);
791 /* Adjacency taken. */
796 /* Packet data, possibly *after* rewrite. */
797 u8 packet_data[128 - 1 * sizeof (u32)];
799 ip6_forward_next_trace_t;
802 format_ip6_forward_next_trace (u8 * s, va_list * args)
804 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
805 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
806 ip6_forward_next_trace_t *t = va_arg (*args, ip6_forward_next_trace_t *);
807 u32 indent = format_get_indent (s);
809 s = format (s, "%U%U",
810 format_white_space, indent,
811 format_ip6_header, t->packet_data, sizeof (t->packet_data));
816 format_ip6_lookup_trace (u8 * s, va_list * args)
818 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
819 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
820 ip6_forward_next_trace_t *t = va_arg (*args, ip6_forward_next_trace_t *);
821 u32 indent = format_get_indent (s);
823 s = format (s, "fib %d dpo-idx %d flow hash: 0x%08x",
824 t->fib_index, t->adj_index, t->flow_hash);
825 s = format (s, "\n%U%U",
826 format_white_space, indent,
827 format_ip6_header, t->packet_data, sizeof (t->packet_data));
833 format_ip6_rewrite_trace (u8 * s, va_list * args)
835 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
836 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
837 ip6_forward_next_trace_t *t = va_arg (*args, ip6_forward_next_trace_t *);
838 u32 indent = format_get_indent (s);
840 s = format (s, "tx_sw_if_index %d adj-idx %d : %U flow hash: 0x%08x",
841 t->fib_index, t->adj_index, format_ip_adjacency,
842 t->adj_index, FORMAT_IP_ADJACENCY_NONE, t->flow_hash);
843 s = format (s, "\n%U%U",
844 format_white_space, indent,
845 format_ip_adjacency_packet_data,
846 t->adj_index, t->packet_data, sizeof (t->packet_data));
850 /* Common trace function for all ip6-forward next nodes. */
852 ip6_forward_next_trace (vlib_main_t * vm,
853 vlib_node_runtime_t * node,
854 vlib_frame_t * frame, vlib_rx_or_tx_t which_adj_index)
857 ip6_main_t *im = &ip6_main;
859 n_left = frame->n_vectors;
860 from = vlib_frame_vector_args (frame);
865 vlib_buffer_t *b0, *b1;
866 ip6_forward_next_trace_t *t0, *t1;
868 /* Prefetch next iteration. */
869 vlib_prefetch_buffer_with_index (vm, from[2], LOAD);
870 vlib_prefetch_buffer_with_index (vm, from[3], LOAD);
875 b0 = vlib_get_buffer (vm, bi0);
876 b1 = vlib_get_buffer (vm, bi1);
878 if (b0->flags & VLIB_BUFFER_IS_TRACED)
880 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
881 t0->adj_index = vnet_buffer (b0)->ip.adj_index[which_adj_index];
882 t0->flow_hash = vnet_buffer (b0)->ip.flow_hash;
884 (vnet_buffer (b0)->sw_if_index[VLIB_TX] !=
885 (u32) ~ 0) ? vnet_buffer (b0)->sw_if_index[VLIB_TX] :
886 vec_elt (im->fib_index_by_sw_if_index,
887 vnet_buffer (b0)->sw_if_index[VLIB_RX]);
889 clib_memcpy_fast (t0->packet_data,
890 vlib_buffer_get_current (b0),
891 sizeof (t0->packet_data));
893 if (b1->flags & VLIB_BUFFER_IS_TRACED)
895 t1 = vlib_add_trace (vm, node, b1, sizeof (t1[0]));
896 t1->adj_index = vnet_buffer (b1)->ip.adj_index[which_adj_index];
897 t1->flow_hash = vnet_buffer (b1)->ip.flow_hash;
899 (vnet_buffer (b1)->sw_if_index[VLIB_TX] !=
900 (u32) ~ 0) ? vnet_buffer (b1)->sw_if_index[VLIB_TX] :
901 vec_elt (im->fib_index_by_sw_if_index,
902 vnet_buffer (b1)->sw_if_index[VLIB_RX]);
904 clib_memcpy_fast (t1->packet_data,
905 vlib_buffer_get_current (b1),
906 sizeof (t1->packet_data));
916 ip6_forward_next_trace_t *t0;
920 b0 = vlib_get_buffer (vm, bi0);
922 if (b0->flags & VLIB_BUFFER_IS_TRACED)
924 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
925 t0->adj_index = vnet_buffer (b0)->ip.adj_index[which_adj_index];
926 t0->flow_hash = vnet_buffer (b0)->ip.flow_hash;
928 (vnet_buffer (b0)->sw_if_index[VLIB_TX] !=
929 (u32) ~ 0) ? vnet_buffer (b0)->sw_if_index[VLIB_TX] :
930 vec_elt (im->fib_index_by_sw_if_index,
931 vnet_buffer (b0)->sw_if_index[VLIB_RX]);
933 clib_memcpy_fast (t0->packet_data,
934 vlib_buffer_get_current (b0),
935 sizeof (t0->packet_data));
942 /* Compute TCP/UDP/ICMP6 checksum in software. */
944 ip6_tcp_udp_icmp_compute_checksum (vlib_main_t * vm, vlib_buffer_t * p0,
945 ip6_header_t * ip0, int *bogus_lengthp)
948 u16 sum16, payload_length_host_byte_order;
949 u32 i, n_this_buffer, n_bytes_left;
950 u32 headers_size = sizeof (ip0[0]);
951 void *data_this_buffer;
953 ASSERT (bogus_lengthp);
956 /* Initialize checksum with ip header. */
957 sum0 = ip0->payload_length + clib_host_to_net_u16 (ip0->protocol);
958 payload_length_host_byte_order = clib_net_to_host_u16 (ip0->payload_length);
959 data_this_buffer = (void *) (ip0 + 1);
961 for (i = 0; i < ARRAY_LEN (ip0->src_address.as_uword); i++)
963 sum0 = ip_csum_with_carry (sum0,
964 clib_mem_unaligned (&ip0->
965 src_address.as_uword[i],
968 ip_csum_with_carry (sum0,
969 clib_mem_unaligned (&ip0->dst_address.as_uword[i],
973 /* some icmp packets may come with a "router alert" hop-by-hop extension header (e.g., mldv2 packets)
974 * or UDP-Ping packets */
975 if (PREDICT_FALSE (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
978 ip6_hop_by_hop_ext_t *ext_hdr =
979 (ip6_hop_by_hop_ext_t *) data_this_buffer;
981 /* validate really icmp6 next */
982 ASSERT ((ext_hdr->next_hdr == IP_PROTOCOL_ICMP6)
983 || (ext_hdr->next_hdr == IP_PROTOCOL_UDP));
985 skip_bytes = 8 * (1 + ext_hdr->n_data_u64s);
986 data_this_buffer = (void *) ((u8 *) data_this_buffer + skip_bytes);
988 payload_length_host_byte_order -= skip_bytes;
989 headers_size += skip_bytes;
992 n_bytes_left = n_this_buffer = payload_length_host_byte_order;
993 if (p0 && n_this_buffer + headers_size > p0->current_length)
996 headers_size ? p0->current_length - headers_size : 0;
999 sum0 = ip_incremental_checksum (sum0, data_this_buffer, n_this_buffer);
1000 n_bytes_left -= n_this_buffer;
1001 if (n_bytes_left == 0)
1004 if (!(p0->flags & VLIB_BUFFER_NEXT_PRESENT))
1009 p0 = vlib_get_buffer (vm, p0->next_buffer);
1010 data_this_buffer = vlib_buffer_get_current (p0);
1011 n_this_buffer = p0->current_length;
1014 sum16 = ~ip_csum_fold (sum0);
1020 ip6_tcp_udp_icmp_validate_checksum (vlib_main_t * vm, vlib_buffer_t * p0)
1022 ip6_header_t *ip0 = vlib_buffer_get_current (p0);
1027 /* some icmp packets may come with a "router alert" hop-by-hop extension header (e.g., mldv2 packets) */
1028 ASSERT (ip0->protocol == IP_PROTOCOL_TCP
1029 || ip0->protocol == IP_PROTOCOL_ICMP6
1030 || ip0->protocol == IP_PROTOCOL_UDP
1031 || ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS);
1033 udp0 = (void *) (ip0 + 1);
1034 if (ip0->protocol == IP_PROTOCOL_UDP && udp0->checksum == 0)
1036 p0->flags |= (VNET_BUFFER_F_L4_CHECKSUM_COMPUTED
1037 | VNET_BUFFER_F_L4_CHECKSUM_CORRECT);
1041 sum16 = ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip0, &bogus_length);
1043 p0->flags |= (VNET_BUFFER_F_L4_CHECKSUM_COMPUTED
1044 | ((sum16 == 0) << VNET_BUFFER_F_LOG2_L4_CHECKSUM_CORRECT));
1050 * @brief returns number of links on which src is reachable.
1053 ip6_urpf_loose_check (ip6_main_t * im, vlib_buffer_t * b, ip6_header_t * i)
1055 const load_balance_t *lb0;
1059 fib_index = vec_elt (im->fib_index_by_sw_if_index,
1060 vnet_buffer (b)->sw_if_index[VLIB_RX]);
1062 (vnet_buffer (b)->sw_if_index[VLIB_TX] == (u32) ~ 0) ?
1063 fib_index : vnet_buffer (b)->sw_if_index[VLIB_TX];
1065 lbi = ip6_fib_table_fwding_lookup (im, fib_index, &i->src_address);
1066 lb0 = load_balance_get (lbi);
1068 return (fib_urpf_check_size (lb0->lb_urpf));
1072 ip6_next_proto_is_tcp_udp (vlib_buffer_t * p0, ip6_header_t * ip0,
1076 proto0 = ip6_locate_header (p0, ip0, IP_PROTOCOL_UDP, udp_offset0);
1077 if (proto0 != IP_PROTOCOL_UDP)
1079 proto0 = ip6_locate_header (p0, ip0, IP_PROTOCOL_TCP, udp_offset0);
1080 proto0 = (proto0 == IP_PROTOCOL_TCP) ? proto0 : 0;
1086 VNET_FEATURE_ARC_INIT (ip6_local) =
1088 .arc_name = "ip6-local",
1089 .start_nodes = VNET_FEATURES ("ip6-local"),
1094 ip6_local_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
1095 vlib_frame_t * frame, int head_of_feature_arc)
1097 ip6_main_t *im = &ip6_main;
1098 ip_lookup_main_t *lm = &im->lookup_main;
1099 ip_local_next_t next_index;
1100 u32 *from, *to_next, n_left_from, n_left_to_next;
1101 vlib_node_runtime_t *error_node =
1102 vlib_node_get_runtime (vm, ip6_input_node.index);
1103 u8 arc_index = vnet_feat_arc_ip6_local.feature_arc_index;
1105 from = vlib_frame_vector_args (frame);
1106 n_left_from = frame->n_vectors;
1107 next_index = node->cached_next_index;
1109 if (node->flags & VLIB_NODE_FLAG_TRACE)
1110 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
1112 while (n_left_from > 0)
1114 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1116 while (n_left_from >= 4 && n_left_to_next >= 2)
1118 vlib_buffer_t *p0, *p1;
1119 ip6_header_t *ip0, *ip1;
1120 udp_header_t *udp0, *udp1;
1121 u32 pi0, ip_len0, udp_len0, flags0, next0;
1122 u32 pi1, ip_len1, udp_len1, flags1, next1;
1123 i32 len_diff0, len_diff1;
1124 u8 error0, type0, good_l4_csum0, is_tcp_udp0;
1125 u8 error1, type1, good_l4_csum1, is_tcp_udp1;
1126 u32 udp_offset0, udp_offset1;
1128 pi0 = to_next[0] = from[0];
1129 pi1 = to_next[1] = from[1];
1133 n_left_to_next -= 2;
1135 error0 = error1 = IP6_ERROR_UNKNOWN_PROTOCOL;
1137 p0 = vlib_get_buffer (vm, pi0);
1138 p1 = vlib_get_buffer (vm, pi1);
1140 ip0 = vlib_buffer_get_current (p0);
1141 ip1 = vlib_buffer_get_current (p1);
1143 if (head_of_feature_arc == 0)
1146 vnet_buffer (p0)->l3_hdr_offset = p0->current_data;
1147 vnet_buffer (p1)->l3_hdr_offset = p1->current_data;
1149 type0 = lm->builtin_protocol_by_ip_protocol[ip0->protocol];
1150 type1 = lm->builtin_protocol_by_ip_protocol[ip1->protocol];
1155 is_tcp_udp0 = ip6_next_proto_is_tcp_udp (p0, ip0, &udp_offset0);
1156 is_tcp_udp1 = ip6_next_proto_is_tcp_udp (p1, ip1, &udp_offset1);
1158 good_l4_csum0 = (flags0 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT
1159 || (flags0 & VNET_BUFFER_F_OFFLOAD_TCP_CKSUM
1160 || flags0 & VNET_BUFFER_F_OFFLOAD_UDP_CKSUM))
1162 good_l4_csum1 = (flags1 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT
1163 || (flags1 & VNET_BUFFER_F_OFFLOAD_TCP_CKSUM
1164 || flags1 & VNET_BUFFER_F_OFFLOAD_UDP_CKSUM))
1169 if (PREDICT_TRUE (is_tcp_udp0))
1171 udp0 = (udp_header_t *) ((u8 *) ip0 + udp_offset0);
1172 /* Don't verify UDP checksum for packets with explicit zero checksum. */
1173 good_l4_csum0 |= type0 == IP_BUILTIN_PROTOCOL_UDP
1174 && udp0->checksum == 0;
1175 /* Verify UDP length. */
1176 if (is_tcp_udp0 == IP_PROTOCOL_UDP)
1178 ip_len0 = clib_net_to_host_u16 (ip0->payload_length);
1179 udp_len0 = clib_net_to_host_u16 (udp0->length);
1180 len_diff0 = ip_len0 - udp_len0;
1183 if (PREDICT_TRUE (is_tcp_udp1))
1185 udp1 = (udp_header_t *) ((u8 *) ip1 + udp_offset1);
1186 /* Don't verify UDP checksum for packets with explicit zero checksum. */
1187 good_l4_csum1 |= type1 == IP_BUILTIN_PROTOCOL_UDP
1188 && udp1->checksum == 0;
1189 /* Verify UDP length. */
1190 if (is_tcp_udp1 == IP_PROTOCOL_UDP)
1192 ip_len1 = clib_net_to_host_u16 (ip1->payload_length);
1193 udp_len1 = clib_net_to_host_u16 (udp1->length);
1194 len_diff1 = ip_len1 - udp_len1;
1198 good_l4_csum0 |= type0 == IP_BUILTIN_PROTOCOL_UNKNOWN;
1199 good_l4_csum1 |= type1 == IP_BUILTIN_PROTOCOL_UNKNOWN;
1201 len_diff0 = type0 == IP_BUILTIN_PROTOCOL_UDP ? len_diff0 : 0;
1202 len_diff1 = type1 == IP_BUILTIN_PROTOCOL_UDP ? len_diff1 : 0;
1204 if (PREDICT_FALSE (type0 != IP_BUILTIN_PROTOCOL_UNKNOWN
1207 VNET_BUFFER_F_L4_CHECKSUM_COMPUTED)))
1209 flags0 = ip6_tcp_udp_icmp_validate_checksum (vm, p0);
1211 (flags0 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0;
1213 if (PREDICT_FALSE (type1 != IP_BUILTIN_PROTOCOL_UNKNOWN
1216 VNET_BUFFER_F_L4_CHECKSUM_COMPUTED)))
1218 flags1 = ip6_tcp_udp_icmp_validate_checksum (vm, p1);
1220 (flags1 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0;
1223 error0 = error1 = IP6_ERROR_UNKNOWN_PROTOCOL;
1224 error0 = len_diff0 < 0 ? IP6_ERROR_UDP_LENGTH : error0;
1225 error1 = len_diff1 < 0 ? IP6_ERROR_UDP_LENGTH : error1;
1227 ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_UDP ==
1228 IP6_ERROR_UDP_CHECKSUM);
1229 ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_ICMP ==
1230 IP6_ERROR_ICMP_CHECKSUM);
1231 error0 = (!good_l4_csum0 ? IP6_ERROR_UDP_CHECKSUM + type0 : error0);
1232 error1 = (!good_l4_csum1 ? IP6_ERROR_UDP_CHECKSUM + type1 : error1);
1234 /* Drop packets from unroutable hosts. */
1235 /* If this is a neighbor solicitation (ICMP), skip source RPF check */
1236 if (error0 == IP6_ERROR_UNKNOWN_PROTOCOL &&
1237 type0 != IP_BUILTIN_PROTOCOL_ICMP &&
1238 !ip6_address_is_link_local_unicast (&ip0->src_address))
1240 error0 = (!ip6_urpf_loose_check (im, p0, ip0)
1241 ? IP6_ERROR_SRC_LOOKUP_MISS : error0);
1243 if (error1 == IP6_ERROR_UNKNOWN_PROTOCOL &&
1244 type1 != IP_BUILTIN_PROTOCOL_ICMP &&
1245 !ip6_address_is_link_local_unicast (&ip1->src_address))
1247 error1 = (!ip6_urpf_loose_check (im, p1, ip1)
1248 ? IP6_ERROR_SRC_LOOKUP_MISS : error1);
1251 vnet_buffer (p0)->ip.fib_index =
1252 vnet_buffer (p0)->sw_if_index[VLIB_TX] != ~0 ?
1253 vnet_buffer (p0)->sw_if_index[VLIB_TX] :
1254 vnet_buffer (p0)->ip.fib_index;
1256 vnet_buffer (p1)->ip.fib_index =
1257 vnet_buffer (p1)->sw_if_index[VLIB_TX] != ~0 ?
1258 vnet_buffer (p1)->sw_if_index[VLIB_TX] :
1259 vnet_buffer (p1)->ip.fib_index;
1263 next0 = lm->local_next_by_ip_protocol[ip0->protocol];
1264 next1 = lm->local_next_by_ip_protocol[ip1->protocol];
1267 error0 != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next0;
1269 error1 != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next1;
1271 p0->error = error_node->errors[error0];
1272 p1->error = error_node->errors[error1];
1274 if (head_of_feature_arc)
1276 if (PREDICT_TRUE (error0 == (u8) IP6_ERROR_UNKNOWN_PROTOCOL))
1277 vnet_feature_arc_start (arc_index,
1278 vnet_buffer (p0)->sw_if_index
1279 [VLIB_RX], &next0, p0);
1280 if (PREDICT_TRUE (error1 == (u8) IP6_ERROR_UNKNOWN_PROTOCOL))
1281 vnet_feature_arc_start (arc_index,
1282 vnet_buffer (p1)->sw_if_index
1283 [VLIB_RX], &next1, p1);
1286 vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
1287 to_next, n_left_to_next,
1288 pi0, pi1, next0, next1);
1291 while (n_left_from > 0 && n_left_to_next > 0)
1296 u32 pi0, ip_len0, udp_len0, flags0, next0;
1298 u8 error0, type0, good_l4_csum0;
1302 pi0 = to_next[0] = from[0];
1306 n_left_to_next -= 1;
1308 error0 = IP6_ERROR_UNKNOWN_PROTOCOL;
1310 p0 = vlib_get_buffer (vm, pi0);
1311 ip0 = vlib_buffer_get_current (p0);
1313 if (head_of_feature_arc == 0)
1316 vnet_buffer (p0)->l3_hdr_offset = p0->current_data;
1318 type0 = lm->builtin_protocol_by_ip_protocol[ip0->protocol];
1320 is_tcp_udp0 = ip6_next_proto_is_tcp_udp (p0, ip0, &udp_offset0);
1321 good_l4_csum0 = (flags0 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT
1322 || (flags0 & VNET_BUFFER_F_OFFLOAD_TCP_CKSUM
1323 || flags0 & VNET_BUFFER_F_OFFLOAD_UDP_CKSUM))
1327 if (PREDICT_TRUE (is_tcp_udp0))
1329 udp0 = (udp_header_t *) ((u8 *) ip0 + udp_offset0);
1330 /* Don't verify UDP checksum for packets with explicit zero
1332 good_l4_csum0 |= type0 == IP_BUILTIN_PROTOCOL_UDP
1333 && udp0->checksum == 0;
1334 /* Verify UDP length. */
1335 if (is_tcp_udp0 == IP_PROTOCOL_UDP)
1337 ip_len0 = clib_net_to_host_u16 (ip0->payload_length);
1338 udp_len0 = clib_net_to_host_u16 (udp0->length);
1339 len_diff0 = ip_len0 - udp_len0;
1343 good_l4_csum0 |= type0 == IP_BUILTIN_PROTOCOL_UNKNOWN;
1344 len_diff0 = type0 == IP_BUILTIN_PROTOCOL_UDP ? len_diff0 : 0;
1346 if (PREDICT_FALSE (type0 != IP_BUILTIN_PROTOCOL_UNKNOWN
1349 VNET_BUFFER_F_L4_CHECKSUM_COMPUTED)))
1351 flags0 = ip6_tcp_udp_icmp_validate_checksum (vm, p0);
1353 (flags0 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0;
1356 error0 = IP6_ERROR_UNKNOWN_PROTOCOL;
1357 error0 = len_diff0 < 0 ? IP6_ERROR_UDP_LENGTH : error0;
1359 ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_UDP ==
1360 IP6_ERROR_UDP_CHECKSUM);
1361 ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_ICMP ==
1362 IP6_ERROR_ICMP_CHECKSUM);
1363 error0 = (!good_l4_csum0 ? IP6_ERROR_UDP_CHECKSUM + type0 : error0);
1365 /* If this is a neighbor solicitation (ICMP), skip src RPF check */
1366 if (error0 == IP6_ERROR_UNKNOWN_PROTOCOL &&
1367 type0 != IP_BUILTIN_PROTOCOL_ICMP &&
1368 !ip6_address_is_link_local_unicast (&ip0->src_address))
1370 error0 = (!ip6_urpf_loose_check (im, p0, ip0)
1371 ? IP6_ERROR_SRC_LOOKUP_MISS : error0);
1374 vnet_buffer (p0)->ip.fib_index =
1375 vnet_buffer (p0)->sw_if_index[VLIB_TX] != ~0 ?
1376 vnet_buffer (p0)->sw_if_index[VLIB_TX] :
1377 vnet_buffer (p0)->ip.fib_index;
1381 next0 = lm->local_next_by_ip_protocol[ip0->protocol];
1383 error0 != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next0;
1385 p0->error = error_node->errors[error0];
1387 if (head_of_feature_arc)
1389 if (PREDICT_TRUE (error0 == (u8) IP6_ERROR_UNKNOWN_PROTOCOL))
1390 vnet_feature_arc_start (arc_index,
1391 vnet_buffer (p0)->sw_if_index
1392 [VLIB_RX], &next0, p0);
1395 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1396 to_next, n_left_to_next,
1400 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1403 return frame->n_vectors;
1407 ip6_local (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
1409 return ip6_local_inline (vm, node, frame, 1 /* head of feature arc */ );
1413 VLIB_REGISTER_NODE (ip6_local_node, static) =
1415 .function = ip6_local,
1416 .name = "ip6-local",
1417 .vector_size = sizeof (u32),
1418 .format_trace = format_ip6_forward_next_trace,
1419 .n_next_nodes = IP_LOCAL_N_NEXT,
1422 [IP_LOCAL_NEXT_DROP] = "ip6-drop",
1423 [IP_LOCAL_NEXT_PUNT] = "ip6-punt",
1424 [IP_LOCAL_NEXT_UDP_LOOKUP] = "ip6-udp-lookup",
1425 [IP_LOCAL_NEXT_ICMP] = "ip6-icmp-input",
1426 [IP_LOCAL_NEXT_REASSEMBLY] = "ip6-reassembly",
1431 VLIB_NODE_FUNCTION_MULTIARCH (ip6_local_node, ip6_local);
1435 ip6_local_end_of_arc (vlib_main_t * vm,
1436 vlib_node_runtime_t * node, vlib_frame_t * frame)
1438 return ip6_local_inline (vm, node, frame, 0 /* head of feature arc */ );
1442 VLIB_REGISTER_NODE (ip6_local_end_of_arc_node,static) = {
1443 .function = ip6_local_end_of_arc,
1444 .name = "ip6-local-end-of-arc",
1445 .vector_size = sizeof (u32),
1447 .format_trace = format_ip6_forward_next_trace,
1448 .sibling_of = "ip6-local",
1451 VLIB_NODE_FUNCTION_MULTIARCH (ip6_local_end_of_arc_node, ip6_local_end_of_arc)
1453 VNET_FEATURE_INIT (ip6_local_end_of_arc, static) = {
1454 .arc_name = "ip6-local",
1455 .node_name = "ip6-local-end-of-arc",
1456 .runs_before = 0, /* not before any other features */
1461 ip6_register_protocol (u32 protocol, u32 node_index)
1463 vlib_main_t *vm = vlib_get_main ();
1464 ip6_main_t *im = &ip6_main;
1465 ip_lookup_main_t *lm = &im->lookup_main;
1467 ASSERT (protocol < ARRAY_LEN (lm->local_next_by_ip_protocol));
1468 lm->local_next_by_ip_protocol[protocol] =
1469 vlib_node_add_next (vm, ip6_local_node.index, node_index);
1473 ip6_probe_neighbor (vlib_main_t * vm, ip6_address_t * dst, u32 sw_if_index,
1476 vnet_main_t *vnm = vnet_get_main ();
1477 ip6_main_t *im = &ip6_main;
1478 icmp6_neighbor_solicitation_header_t *h;
1480 ip_interface_address_t *ia;
1481 ip_adjacency_t *adj;
1482 vnet_hw_interface_t *hi;
1483 vnet_sw_interface_t *si;
1489 si = vnet_get_sw_interface (vnm, sw_if_index);
1491 if (!(si->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP))
1493 return clib_error_return (0, "%U: interface %U down",
1494 format_ip6_address, dst,
1495 format_vnet_sw_if_index_name, vnm,
1500 ip6_interface_address_matching_destination (im, dst, sw_if_index, &ia);
1503 vnm->api_errno = VNET_API_ERROR_NO_MATCHING_INTERFACE;
1504 return clib_error_return
1505 (0, "no matching interface address for destination %U (interface %U)",
1506 format_ip6_address, dst,
1507 format_vnet_sw_if_index_name, vnm, sw_if_index);
1511 vlib_packet_template_get_packet (vm,
1512 &im->discover_neighbor_packet_template,
1515 return clib_error_return (0, "ICMP6 NS packet allocation failed");
1517 hi = vnet_get_sup_hw_interface (vnm, sw_if_index);
1519 /* Destination address is a solicited node multicast address. We need to fill in
1520 the low 24 bits with low 24 bits of target's address. */
1521 h->ip.dst_address.as_u8[13] = dst->as_u8[13];
1522 h->ip.dst_address.as_u8[14] = dst->as_u8[14];
1523 h->ip.dst_address.as_u8[15] = dst->as_u8[15];
1525 h->ip.src_address = src[0];
1526 h->neighbor.target_address = dst[0];
1528 if (PREDICT_FALSE (!hi->hw_address))
1530 return clib_error_return (0, "%U: interface %U do not support ip probe",
1531 format_ip6_address, dst,
1532 format_vnet_sw_if_index_name, vnm,
1536 clib_memcpy_fast (h->link_layer_option.ethernet_address, hi->hw_address,
1537 vec_len (hi->hw_address));
1539 h->neighbor.icmp.checksum =
1540 ip6_tcp_udp_icmp_compute_checksum (vm, 0, &h->ip, &bogus_length);
1541 ASSERT (bogus_length == 0);
1543 b = vlib_get_buffer (vm, bi);
1544 vnet_buffer (b)->sw_if_index[VLIB_RX] =
1545 vnet_buffer (b)->sw_if_index[VLIB_TX] = sw_if_index;
1547 /* Add encapsulation string for software interface (e.g. ethernet header). */
1548 ip46_address_t nh = {
1552 ai = adj_nbr_add_or_lock (FIB_PROTOCOL_IP6,
1553 VNET_LINK_IP6, &nh, sw_if_index);
1556 /* Peer has been previously resolved, retrieve glean adj instead */
1557 if (adj->lookup_next_index == IP_LOOKUP_NEXT_REWRITE && refresh == 0)
1560 ai = adj_glean_add_or_lock (FIB_PROTOCOL_IP6,
1561 VNET_LINK_IP6, sw_if_index, &nh);
1565 vnet_rewrite_one_header (adj[0], h, sizeof (ethernet_header_t));
1566 vlib_buffer_advance (b, -adj->rewrite_header.data_bytes);
1569 vlib_frame_t *f = vlib_get_frame_to_node (vm, hi->output_node_index);
1570 u32 *to_next = vlib_frame_vector_args (f);
1573 vlib_put_frame_to_node (vm, hi->output_node_index, f);
1577 return /* no error */ 0;
1582 IP6_REWRITE_NEXT_DROP,
1583 IP6_REWRITE_NEXT_ICMP_ERROR,
1584 IP6_REWRITE_NEXT_FRAGMENT,
1585 IP6_REWRITE_N_NEXT /* Last */
1586 } ip6_rewrite_next_t;
1589 * This bits of an IPv6 address to mask to construct a multicast
1592 #define IP6_MCAST_ADDR_MASK 0xffffffff
1595 ip6_mtu_check (vlib_buffer_t * b, u16 packet_bytes,
1596 u16 adj_packet_bytes, bool is_locally_generated,
1597 u32 * next, u32 * error)
1599 if (adj_packet_bytes >= 1280 && packet_bytes > adj_packet_bytes)
1601 if (is_locally_generated)
1603 /* IP fragmentation */
1604 ip_frag_set_vnet_buffer (b, adj_packet_bytes,
1605 IP6_FRAG_NEXT_IP6_REWRITE, 0);
1606 *next = IP6_REWRITE_NEXT_FRAGMENT;
1607 *error = IP6_ERROR_MTU_EXCEEDED;
1611 *error = IP6_ERROR_MTU_EXCEEDED;
1612 icmp6_error_set_vnet_buffer (b, ICMP6_packet_too_big, 0,
1614 *next = IP6_REWRITE_NEXT_ICMP_ERROR;
1620 ip6_rewrite_inline (vlib_main_t * vm,
1621 vlib_node_runtime_t * node,
1622 vlib_frame_t * frame,
1623 int do_counters, int is_midchain, int is_mcast)
1625 ip_lookup_main_t *lm = &ip6_main.lookup_main;
1626 u32 *from = vlib_frame_vector_args (frame);
1627 u32 n_left_from, n_left_to_next, *to_next, next_index;
1628 vlib_node_runtime_t *error_node =
1629 vlib_node_get_runtime (vm, ip6_input_node.index);
1631 n_left_from = frame->n_vectors;
1632 next_index = node->cached_next_index;
1633 u32 thread_index = vm->thread_index;
1635 while (n_left_from > 0)
1637 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1639 while (n_left_from >= 4 && n_left_to_next >= 2)
1641 ip_adjacency_t *adj0, *adj1;
1642 vlib_buffer_t *p0, *p1;
1643 ip6_header_t *ip0, *ip1;
1644 u32 pi0, rw_len0, next0, error0, adj_index0;
1645 u32 pi1, rw_len1, next1, error1, adj_index1;
1646 u32 tx_sw_if_index0, tx_sw_if_index1;
1647 bool is_locally_originated0, is_locally_originated1;
1649 /* Prefetch next iteration. */
1651 vlib_buffer_t *p2, *p3;
1653 p2 = vlib_get_buffer (vm, from[2]);
1654 p3 = vlib_get_buffer (vm, from[3]);
1656 vlib_prefetch_buffer_header (p2, LOAD);
1657 vlib_prefetch_buffer_header (p3, LOAD);
1659 CLIB_PREFETCH (p2->pre_data, 32, STORE);
1660 CLIB_PREFETCH (p3->pre_data, 32, STORE);
1662 CLIB_PREFETCH (p2->data, sizeof (ip0[0]), STORE);
1663 CLIB_PREFETCH (p3->data, sizeof (ip0[0]), STORE);
1666 pi0 = to_next[0] = from[0];
1667 pi1 = to_next[1] = from[1];
1672 n_left_to_next -= 2;
1674 p0 = vlib_get_buffer (vm, pi0);
1675 p1 = vlib_get_buffer (vm, pi1);
1677 adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
1678 adj_index1 = vnet_buffer (p1)->ip.adj_index[VLIB_TX];
1680 ip0 = vlib_buffer_get_current (p0);
1681 ip1 = vlib_buffer_get_current (p1);
1683 error0 = error1 = IP6_ERROR_NONE;
1684 next0 = next1 = IP6_REWRITE_NEXT_DROP;
1686 is_locally_originated0 =
1687 p0->flags & VNET_BUFFER_F_LOCALLY_ORIGINATED;
1688 if (PREDICT_TRUE (!is_locally_originated0))
1690 i32 hop_limit0 = ip0->hop_limit;
1692 /* Input node should have reject packets with hop limit 0. */
1693 ASSERT (ip0->hop_limit > 0);
1697 ip0->hop_limit = hop_limit0;
1700 * If the hop count drops below 1 when forwarding, generate
1703 if (PREDICT_FALSE (hop_limit0 <= 0))
1705 error0 = IP6_ERROR_TIME_EXPIRED;
1706 next0 = IP6_REWRITE_NEXT_ICMP_ERROR;
1707 vnet_buffer (p0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
1708 icmp6_error_set_vnet_buffer (p0, ICMP6_time_exceeded,
1709 ICMP6_time_exceeded_ttl_exceeded_in_transit,
1715 p0->flags &= ~VNET_BUFFER_F_LOCALLY_ORIGINATED;
1717 is_locally_originated1 =
1718 p1->flags & VNET_BUFFER_F_LOCALLY_ORIGINATED;
1719 if (PREDICT_TRUE (!is_locally_originated1))
1721 i32 hop_limit1 = ip1->hop_limit;
1723 /* Input node should have reject packets with hop limit 0. */
1724 ASSERT (ip1->hop_limit > 0);
1728 ip1->hop_limit = hop_limit1;
1731 * If the hop count drops below 1 when forwarding, generate
1734 if (PREDICT_FALSE (hop_limit1 <= 0))
1736 error1 = IP6_ERROR_TIME_EXPIRED;
1737 next1 = IP6_REWRITE_NEXT_ICMP_ERROR;
1738 vnet_buffer (p1)->sw_if_index[VLIB_TX] = (u32) ~ 0;
1739 icmp6_error_set_vnet_buffer (p1, ICMP6_time_exceeded,
1740 ICMP6_time_exceeded_ttl_exceeded_in_transit,
1746 p1->flags &= ~VNET_BUFFER_F_LOCALLY_ORIGINATED;
1748 adj0 = adj_get (adj_index0);
1749 adj1 = adj_get (adj_index1);
1751 rw_len0 = adj0[0].rewrite_header.data_bytes;
1752 rw_len1 = adj1[0].rewrite_header.data_bytes;
1753 vnet_buffer (p0)->ip.save_rewrite_length = rw_len0;
1754 vnet_buffer (p1)->ip.save_rewrite_length = rw_len1;
1758 vlib_increment_combined_counter
1759 (&adjacency_counters,
1760 thread_index, adj_index0, 1,
1761 vlib_buffer_length_in_chain (vm, p0) + rw_len0);
1762 vlib_increment_combined_counter
1763 (&adjacency_counters,
1764 thread_index, adj_index1, 1,
1765 vlib_buffer_length_in_chain (vm, p1) + rw_len1);
1768 /* Check MTU of outgoing interface. */
1769 ip6_mtu_check (p0, clib_net_to_host_u16 (ip0->payload_length) +
1770 sizeof (ip6_header_t),
1771 adj0[0].rewrite_header.max_l3_packet_bytes,
1772 is_locally_originated0, &next0, &error0);
1773 ip6_mtu_check (p1, clib_net_to_host_u16 (ip1->payload_length) +
1774 sizeof (ip6_header_t),
1775 adj1[0].rewrite_header.max_l3_packet_bytes,
1776 is_locally_originated1, &next1, &error1);
1778 /* Don't adjust the buffer for hop count issue; icmp-error node
1779 * wants to see the IP headerr */
1780 if (PREDICT_TRUE (error0 == IP6_ERROR_NONE))
1782 p0->current_data -= rw_len0;
1783 p0->current_length += rw_len0;
1785 tx_sw_if_index0 = adj0[0].rewrite_header.sw_if_index;
1786 vnet_buffer (p0)->sw_if_index[VLIB_TX] = tx_sw_if_index0;
1787 next0 = adj0[0].rewrite_header.next_index;
1790 (adj0[0].rewrite_header.flags & VNET_REWRITE_HAS_FEATURES))
1791 vnet_feature_arc_start (lm->output_feature_arc_index,
1792 tx_sw_if_index0, &next0, p0);
1794 if (PREDICT_TRUE (error1 == IP6_ERROR_NONE))
1796 p1->current_data -= rw_len1;
1797 p1->current_length += rw_len1;
1799 tx_sw_if_index1 = adj1[0].rewrite_header.sw_if_index;
1800 vnet_buffer (p1)->sw_if_index[VLIB_TX] = tx_sw_if_index1;
1801 next1 = adj1[0].rewrite_header.next_index;
1804 (adj1[0].rewrite_header.flags & VNET_REWRITE_HAS_FEATURES))
1805 vnet_feature_arc_start (lm->output_feature_arc_index,
1806 tx_sw_if_index1, &next1, p1);
1809 /* Guess we are only writing on simple Ethernet header. */
1810 vnet_rewrite_two_headers (adj0[0], adj1[0],
1811 ip0, ip1, sizeof (ethernet_header_t));
1815 adj0->sub_type.midchain.fixup_func
1816 (vm, adj0, p0, adj0->sub_type.midchain.fixup_data);
1817 adj1->sub_type.midchain.fixup_func
1818 (vm, adj1, p1, adj1->sub_type.midchain.fixup_data);
1823 * copy bytes from the IP address into the MAC rewrite
1825 vnet_ip_mcast_fixup_header (IP6_MCAST_ADDR_MASK,
1827 rewrite_header.dst_mcast_offset,
1828 &ip0->dst_address.as_u32[3],
1830 vnet_ip_mcast_fixup_header (IP6_MCAST_ADDR_MASK,
1832 rewrite_header.dst_mcast_offset,
1833 &ip1->dst_address.as_u32[3],
1837 vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
1838 to_next, n_left_to_next,
1839 pi0, pi1, next0, next1);
1842 while (n_left_from > 0 && n_left_to_next > 0)
1844 ip_adjacency_t *adj0;
1848 u32 adj_index0, next0, error0;
1849 u32 tx_sw_if_index0;
1850 bool is_locally_originated0;
1852 pi0 = to_next[0] = from[0];
1854 p0 = vlib_get_buffer (vm, pi0);
1856 adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
1858 adj0 = adj_get (adj_index0);
1860 ip0 = vlib_buffer_get_current (p0);
1862 error0 = IP6_ERROR_NONE;
1863 next0 = IP6_REWRITE_NEXT_DROP;
1865 /* Check hop limit */
1866 is_locally_originated0 =
1867 p0->flags & VNET_BUFFER_F_LOCALLY_ORIGINATED;
1868 if (PREDICT_TRUE (!is_locally_originated0))
1870 i32 hop_limit0 = ip0->hop_limit;
1872 ASSERT (ip0->hop_limit > 0);
1876 ip0->hop_limit = hop_limit0;
1878 if (PREDICT_FALSE (hop_limit0 <= 0))
1881 * If the hop count drops below 1 when forwarding, generate
1884 error0 = IP6_ERROR_TIME_EXPIRED;
1885 next0 = IP6_REWRITE_NEXT_ICMP_ERROR;
1886 vnet_buffer (p0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
1887 icmp6_error_set_vnet_buffer (p0, ICMP6_time_exceeded,
1888 ICMP6_time_exceeded_ttl_exceeded_in_transit,
1894 p0->flags &= ~VNET_BUFFER_F_LOCALLY_ORIGINATED;
1897 /* Guess we are only writing on simple Ethernet header. */
1898 vnet_rewrite_one_header (adj0[0], ip0, sizeof (ethernet_header_t));
1900 /* Update packet buffer attributes/set output interface. */
1901 rw_len0 = adj0[0].rewrite_header.data_bytes;
1902 vnet_buffer (p0)->ip.save_rewrite_length = rw_len0;
1906 vlib_increment_combined_counter
1907 (&adjacency_counters,
1908 thread_index, adj_index0, 1,
1909 vlib_buffer_length_in_chain (vm, p0) + rw_len0);
1912 /* Check MTU of outgoing interface. */
1913 ip6_mtu_check (p0, clib_net_to_host_u16 (ip0->payload_length) +
1914 sizeof (ip6_header_t),
1915 adj0[0].rewrite_header.max_l3_packet_bytes,
1916 is_locally_originated0, &next0, &error0);
1918 /* Don't adjust the buffer for hop count issue; icmp-error node
1919 * wants to see the IP header */
1920 if (PREDICT_TRUE (error0 == IP6_ERROR_NONE))
1922 p0->current_data -= rw_len0;
1923 p0->current_length += rw_len0;
1925 tx_sw_if_index0 = adj0[0].rewrite_header.sw_if_index;
1927 vnet_buffer (p0)->sw_if_index[VLIB_TX] = tx_sw_if_index0;
1928 next0 = adj0[0].rewrite_header.next_index;
1931 (adj0[0].rewrite_header.flags & VNET_REWRITE_HAS_FEATURES))
1932 vnet_feature_arc_start (lm->output_feature_arc_index,
1933 tx_sw_if_index0, &next0, p0);
1938 adj0->sub_type.midchain.fixup_func
1939 (vm, adj0, p0, adj0->sub_type.midchain.fixup_data);
1943 vnet_ip_mcast_fixup_header (IP6_MCAST_ADDR_MASK,
1945 rewrite_header.dst_mcast_offset,
1946 &ip0->dst_address.as_u32[3],
1950 p0->error = error_node->errors[error0];
1955 n_left_to_next -= 1;
1957 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1958 to_next, n_left_to_next,
1962 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1965 /* Need to do trace after rewrites to pick up new packet data. */
1966 if (node->flags & VLIB_NODE_FLAG_TRACE)
1967 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
1969 return frame->n_vectors;
1973 ip6_rewrite (vlib_main_t * vm,
1974 vlib_node_runtime_t * node, vlib_frame_t * frame)
1976 if (adj_are_counters_enabled ())
1977 return ip6_rewrite_inline (vm, node, frame, 1, 0, 0);
1979 return ip6_rewrite_inline (vm, node, frame, 0, 0, 0);
1983 ip6_rewrite_bcast (vlib_main_t * vm,
1984 vlib_node_runtime_t * node, vlib_frame_t * frame)
1986 if (adj_are_counters_enabled ())
1987 return ip6_rewrite_inline (vm, node, frame, 1, 0, 0);
1989 return ip6_rewrite_inline (vm, node, frame, 0, 0, 0);
1993 ip6_rewrite_mcast (vlib_main_t * vm,
1994 vlib_node_runtime_t * node, vlib_frame_t * frame)
1996 if (adj_are_counters_enabled ())
1997 return ip6_rewrite_inline (vm, node, frame, 1, 0, 1);
1999 return ip6_rewrite_inline (vm, node, frame, 0, 0, 1);
2003 ip6_midchain (vlib_main_t * vm,
2004 vlib_node_runtime_t * node, vlib_frame_t * frame)
2006 if (adj_are_counters_enabled ())
2007 return ip6_rewrite_inline (vm, node, frame, 1, 1, 0);
2009 return ip6_rewrite_inline (vm, node, frame, 0, 1, 0);
2013 ip6_mcast_midchain (vlib_main_t * vm,
2014 vlib_node_runtime_t * node, vlib_frame_t * frame)
2016 if (adj_are_counters_enabled ())
2017 return ip6_rewrite_inline (vm, node, frame, 1, 1, 1);
2019 return ip6_rewrite_inline (vm, node, frame, 0, 1, 1);
2023 VLIB_REGISTER_NODE (ip6_midchain_node) =
2025 .function = ip6_midchain,
2026 .name = "ip6-midchain",
2027 .vector_size = sizeof (u32),
2028 .format_trace = format_ip6_forward_next_trace,
2029 .sibling_of = "ip6-rewrite",
2032 VLIB_NODE_FUNCTION_MULTIARCH (ip6_midchain_node, ip6_midchain);
2034 VLIB_REGISTER_NODE (ip6_rewrite_node) =
2036 .function = ip6_rewrite,
2037 .name = "ip6-rewrite",
2038 .vector_size = sizeof (u32),
2039 .format_trace = format_ip6_rewrite_trace,
2040 .n_next_nodes = IP6_REWRITE_N_NEXT,
2043 [IP6_REWRITE_NEXT_DROP] = "ip6-drop",
2044 [IP6_REWRITE_NEXT_ICMP_ERROR] = "ip6-icmp-error",
2045 [IP6_REWRITE_NEXT_FRAGMENT] = "ip6-frag",
2049 VLIB_NODE_FUNCTION_MULTIARCH (ip6_rewrite_node, ip6_rewrite);
2051 VLIB_REGISTER_NODE (ip6_rewrite_bcast_node) = {
2052 .function = ip6_rewrite_bcast,
2053 .name = "ip6-rewrite-bcast",
2054 .vector_size = sizeof (u32),
2056 .format_trace = format_ip6_rewrite_trace,
2057 .sibling_of = "ip6-rewrite",
2059 VLIB_NODE_FUNCTION_MULTIARCH (ip6_rewrite_bcast_node, ip6_rewrite_bcast)
2061 VLIB_REGISTER_NODE (ip6_rewrite_mcast_node) =
2063 .function = ip6_rewrite_mcast,
2064 .name = "ip6-rewrite-mcast",
2065 .vector_size = sizeof (u32),
2066 .format_trace = format_ip6_rewrite_trace,
2067 .sibling_of = "ip6-rewrite",
2070 VLIB_NODE_FUNCTION_MULTIARCH (ip6_rewrite_mcast_node, ip6_rewrite_mcast);
2072 VLIB_REGISTER_NODE (ip6_mcast_midchain_node, static) =
2074 .function = ip6_mcast_midchain,
2075 .name = "ip6-mcast-midchain",
2076 .vector_size = sizeof (u32),
2077 .format_trace = format_ip6_rewrite_trace,
2078 .sibling_of = "ip6-rewrite",
2081 VLIB_NODE_FUNCTION_MULTIARCH (ip6_mcast_midchain_node, ip6_mcast_midchain);
2085 * Hop-by-Hop handling
2087 ip6_hop_by_hop_main_t ip6_hop_by_hop_main;
2089 #define foreach_ip6_hop_by_hop_error \
2090 _(PROCESSED, "pkts with ip6 hop-by-hop options") \
2091 _(FORMAT, "incorrectly formatted hop-by-hop options") \
2092 _(UNKNOWN_OPTION, "unknown ip6 hop-by-hop options")
2097 #define _(sym,str) IP6_HOP_BY_HOP_ERROR_##sym,
2098 foreach_ip6_hop_by_hop_error
2100 IP6_HOP_BY_HOP_N_ERROR,
2101 } ip6_hop_by_hop_error_t;
2105 * Primary h-b-h handler trace support
2106 * We work pretty hard on the problem for obvious reasons
2112 u8 option_data[256];
2113 } ip6_hop_by_hop_trace_t;
2115 vlib_node_registration_t ip6_hop_by_hop_node;
2117 static char *ip6_hop_by_hop_error_strings[] = {
2118 #define _(sym,string) string,
2119 foreach_ip6_hop_by_hop_error
2124 format_ip6_hop_by_hop_ext_hdr (u8 * s, va_list * args)
2126 ip6_hop_by_hop_header_t *hbh0 = va_arg (*args, ip6_hop_by_hop_header_t *);
2127 int total_len = va_arg (*args, int);
2128 ip6_hop_by_hop_option_t *opt0, *limit0;
2129 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2132 s = format (s, "IP6_HOP_BY_HOP: next protocol %d len %d total %d",
2133 hbh0->protocol, (hbh0->length + 1) << 3, total_len);
2135 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2136 limit0 = (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 + total_len);
2138 while (opt0 < limit0)
2143 case 0: /* Pad, just stop */
2144 opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0 + 1);
2148 if (hm->trace[type0])
2150 s = (*hm->trace[type0]) (s, opt0);
2155 format (s, "\n unrecognized option %d length %d", type0,
2159 (ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length +
2160 sizeof (ip6_hop_by_hop_option_t));
2168 format_ip6_hop_by_hop_trace (u8 * s, va_list * args)
2170 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
2171 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
2172 ip6_hop_by_hop_trace_t *t = va_arg (*args, ip6_hop_by_hop_trace_t *);
2173 ip6_hop_by_hop_header_t *hbh0;
2174 ip6_hop_by_hop_option_t *opt0, *limit0;
2175 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2179 hbh0 = (ip6_hop_by_hop_header_t *) t->option_data;
2181 s = format (s, "IP6_HOP_BY_HOP: next index %d len %d traced %d",
2182 t->next_index, (hbh0->length + 1) << 3, t->trace_len);
2184 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2185 limit0 = (ip6_hop_by_hop_option_t *) ((u8 *) hbh0) + t->trace_len;
2187 while (opt0 < limit0)
2192 case 0: /* Pad, just stop */
2193 opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0) + 1;
2197 if (hm->trace[type0])
2199 s = (*hm->trace[type0]) (s, opt0);
2204 format (s, "\n unrecognized option %d length %d", type0,
2208 (ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length +
2209 sizeof (ip6_hop_by_hop_option_t));
2217 ip6_scan_hbh_options (vlib_buffer_t * b0,
2219 ip6_hop_by_hop_header_t * hbh0,
2220 ip6_hop_by_hop_option_t * opt0,
2221 ip6_hop_by_hop_option_t * limit0, u32 * next0)
2223 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2227 while (opt0 < limit0)
2233 opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0) + 1;
2238 if (hm->options[type0])
2240 if ((*hm->options[type0]) (b0, ip0, opt0) < 0)
2242 error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2248 /* Unrecognized mandatory option, check the two high order bits */
2249 switch (opt0->type & HBH_OPTION_TYPE_HIGH_ORDER_BITS)
2251 case HBH_OPTION_TYPE_SKIP_UNKNOWN:
2253 case HBH_OPTION_TYPE_DISCARD_UNKNOWN:
2254 error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2255 *next0 = IP_LOOKUP_NEXT_DROP;
2257 case HBH_OPTION_TYPE_DISCARD_UNKNOWN_ICMP:
2258 error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2259 *next0 = IP_LOOKUP_NEXT_ICMP_ERROR;
2260 icmp6_error_set_vnet_buffer (b0, ICMP6_parameter_problem,
2261 ICMP6_parameter_problem_unrecognized_option,
2262 (u8 *) opt0 - (u8 *) ip0);
2264 case HBH_OPTION_TYPE_DISCARD_UNKNOWN_ICMP_NOT_MCAST:
2265 error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2266 if (!ip6_address_is_multicast (&ip0->dst_address))
2268 *next0 = IP_LOOKUP_NEXT_ICMP_ERROR;
2269 icmp6_error_set_vnet_buffer (b0,
2270 ICMP6_parameter_problem,
2271 ICMP6_parameter_problem_unrecognized_option,
2272 (u8 *) opt0 - (u8 *) ip0);
2276 *next0 = IP_LOOKUP_NEXT_DROP;
2284 (ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length +
2285 sizeof (ip6_hop_by_hop_option_t));
2291 * Process the Hop-by-Hop Options header
2294 ip6_hop_by_hop (vlib_main_t * vm,
2295 vlib_node_runtime_t * node, vlib_frame_t * frame)
2297 vlib_node_runtime_t *error_node =
2298 vlib_node_get_runtime (vm, ip6_hop_by_hop_node.index);
2299 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2300 u32 n_left_from, *from, *to_next;
2301 ip_lookup_next_t next_index;
2303 from = vlib_frame_vector_args (frame);
2304 n_left_from = frame->n_vectors;
2305 next_index = node->cached_next_index;
2307 while (n_left_from > 0)
2311 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
2313 while (n_left_from >= 4 && n_left_to_next >= 2)
2316 vlib_buffer_t *b0, *b1;
2318 ip6_header_t *ip0, *ip1;
2319 ip6_hop_by_hop_header_t *hbh0, *hbh1;
2320 ip6_hop_by_hop_option_t *opt0, *limit0, *opt1, *limit1;
2321 u8 error0 = 0, error1 = 0;
2323 /* Prefetch next iteration. */
2325 vlib_buffer_t *p2, *p3;
2327 p2 = vlib_get_buffer (vm, from[2]);
2328 p3 = vlib_get_buffer (vm, from[3]);
2330 vlib_prefetch_buffer_header (p2, LOAD);
2331 vlib_prefetch_buffer_header (p3, LOAD);
2333 CLIB_PREFETCH (p2->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
2334 CLIB_PREFETCH (p3->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
2337 /* Speculatively enqueue b0, b1 to the current next frame */
2338 to_next[0] = bi0 = from[0];
2339 to_next[1] = bi1 = from[1];
2343 n_left_to_next -= 2;
2345 b0 = vlib_get_buffer (vm, bi0);
2346 b1 = vlib_get_buffer (vm, bi1);
2348 /* Default use the next_index from the adjacency. A HBH option rarely redirects to a different node */
2349 u32 adj_index0 = vnet_buffer (b0)->ip.adj_index[VLIB_TX];
2350 ip_adjacency_t *adj0 = adj_get (adj_index0);
2351 u32 adj_index1 = vnet_buffer (b1)->ip.adj_index[VLIB_TX];
2352 ip_adjacency_t *adj1 = adj_get (adj_index1);
2354 /* Default use the next_index from the adjacency. A HBH option rarely redirects to a different node */
2355 next0 = adj0->lookup_next_index;
2356 next1 = adj1->lookup_next_index;
2358 ip0 = vlib_buffer_get_current (b0);
2359 ip1 = vlib_buffer_get_current (b1);
2360 hbh0 = (ip6_hop_by_hop_header_t *) (ip0 + 1);
2361 hbh1 = (ip6_hop_by_hop_header_t *) (ip1 + 1);
2362 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2363 opt1 = (ip6_hop_by_hop_option_t *) (hbh1 + 1);
2365 (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 +
2366 ((hbh0->length + 1) << 3));
2368 (ip6_hop_by_hop_option_t *) ((u8 *) hbh1 +
2369 ((hbh1->length + 1) << 3));
2372 * Basic validity checks
2374 if ((hbh0->length + 1) << 3 >
2375 clib_net_to_host_u16 (ip0->payload_length))
2377 error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2378 next0 = IP_LOOKUP_NEXT_DROP;
2381 /* Scan the set of h-b-h options, process ones that we understand */
2382 error0 = ip6_scan_hbh_options (b0, ip0, hbh0, opt0, limit0, &next0);
2384 if ((hbh1->length + 1) << 3 >
2385 clib_net_to_host_u16 (ip1->payload_length))
2387 error1 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2388 next1 = IP_LOOKUP_NEXT_DROP;
2391 /* Scan the set of h-b-h options, process ones that we understand */
2392 error1 = ip6_scan_hbh_options (b1, ip1, hbh1, opt1, limit1, &next1);
2395 /* Has the classifier flagged this buffer for special treatment? */
2398 && (vnet_buffer (b0)->l2_classify.opaque_index & OI_DECAP)))
2399 next0 = hm->next_override;
2401 /* Has the classifier flagged this buffer for special treatment? */
2404 && (vnet_buffer (b1)->l2_classify.opaque_index & OI_DECAP)))
2405 next1 = hm->next_override;
2407 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)))
2409 if (b0->flags & VLIB_BUFFER_IS_TRACED)
2411 ip6_hop_by_hop_trace_t *t =
2412 vlib_add_trace (vm, node, b0, sizeof (*t));
2413 u32 trace_len = (hbh0->length + 1) << 3;
2414 t->next_index = next0;
2415 /* Capture the h-b-h option verbatim */
2418 ARRAY_LEN (t->option_data) ? trace_len :
2419 ARRAY_LEN (t->option_data);
2420 t->trace_len = trace_len;
2421 clib_memcpy_fast (t->option_data, hbh0, trace_len);
2423 if (b1->flags & VLIB_BUFFER_IS_TRACED)
2425 ip6_hop_by_hop_trace_t *t =
2426 vlib_add_trace (vm, node, b1, sizeof (*t));
2427 u32 trace_len = (hbh1->length + 1) << 3;
2428 t->next_index = next1;
2429 /* Capture the h-b-h option verbatim */
2432 ARRAY_LEN (t->option_data) ? trace_len :
2433 ARRAY_LEN (t->option_data);
2434 t->trace_len = trace_len;
2435 clib_memcpy_fast (t->option_data, hbh1, trace_len);
2440 b0->error = error_node->errors[error0];
2441 b1->error = error_node->errors[error1];
2443 /* verify speculative enqueue, maybe switch current next frame */
2444 vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
2445 n_left_to_next, bi0, bi1, next0,
2449 while (n_left_from > 0 && n_left_to_next > 0)
2455 ip6_hop_by_hop_header_t *hbh0;
2456 ip6_hop_by_hop_option_t *opt0, *limit0;
2459 /* Speculatively enqueue b0 to the current next frame */
2465 n_left_to_next -= 1;
2467 b0 = vlib_get_buffer (vm, bi0);
2469 * Default use the next_index from the adjacency.
2470 * A HBH option rarely redirects to a different node
2472 u32 adj_index0 = vnet_buffer (b0)->ip.adj_index[VLIB_TX];
2473 ip_adjacency_t *adj0 = adj_get (adj_index0);
2474 next0 = adj0->lookup_next_index;
2476 ip0 = vlib_buffer_get_current (b0);
2477 hbh0 = (ip6_hop_by_hop_header_t *) (ip0 + 1);
2478 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2480 (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 +
2481 ((hbh0->length + 1) << 3));
2484 * Basic validity checks
2486 if ((hbh0->length + 1) << 3 >
2487 clib_net_to_host_u16 (ip0->payload_length))
2489 error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2490 next0 = IP_LOOKUP_NEXT_DROP;
2494 /* Scan the set of h-b-h options, process ones that we understand */
2495 error0 = ip6_scan_hbh_options (b0, ip0, hbh0, opt0, limit0, &next0);
2498 /* Has the classifier flagged this buffer for special treatment? */
2501 && (vnet_buffer (b0)->l2_classify.opaque_index & OI_DECAP)))
2502 next0 = hm->next_override;
2504 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
2506 ip6_hop_by_hop_trace_t *t =
2507 vlib_add_trace (vm, node, b0, sizeof (*t));
2508 u32 trace_len = (hbh0->length + 1) << 3;
2509 t->next_index = next0;
2510 /* Capture the h-b-h option verbatim */
2513 ARRAY_LEN (t->option_data) ? trace_len :
2514 ARRAY_LEN (t->option_data);
2515 t->trace_len = trace_len;
2516 clib_memcpy_fast (t->option_data, hbh0, trace_len);
2519 b0->error = error_node->errors[error0];
2521 /* verify speculative enqueue, maybe switch current next frame */
2522 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
2523 n_left_to_next, bi0, next0);
2525 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2527 return frame->n_vectors;
2531 VLIB_REGISTER_NODE (ip6_hop_by_hop_node) =
2533 .function = ip6_hop_by_hop,
2534 .name = "ip6-hop-by-hop",
2535 .sibling_of = "ip6-lookup",
2536 .vector_size = sizeof (u32),
2537 .format_trace = format_ip6_hop_by_hop_trace,
2538 .type = VLIB_NODE_TYPE_INTERNAL,
2539 .n_errors = ARRAY_LEN (ip6_hop_by_hop_error_strings),
2540 .error_strings = ip6_hop_by_hop_error_strings,
2545 VLIB_NODE_FUNCTION_MULTIARCH (ip6_hop_by_hop_node, ip6_hop_by_hop);
2547 static clib_error_t *
2548 ip6_hop_by_hop_init (vlib_main_t * vm)
2550 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2551 clib_memset (hm->options, 0, sizeof (hm->options));
2552 clib_memset (hm->trace, 0, sizeof (hm->trace));
2553 hm->next_override = IP6_LOOKUP_NEXT_POP_HOP_BY_HOP;
2557 VLIB_INIT_FUNCTION (ip6_hop_by_hop_init);
2560 ip6_hbh_set_next_override (uword next)
2562 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2564 hm->next_override = next;
2568 ip6_hbh_register_option (u8 option,
2569 int options (vlib_buffer_t * b, ip6_header_t * ip,
2570 ip6_hop_by_hop_option_t * opt),
2571 u8 * trace (u8 * s, ip6_hop_by_hop_option_t * opt))
2573 ip6_main_t *im = &ip6_main;
2574 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2576 ASSERT ((u32) option < ARRAY_LEN (hm->options));
2578 /* Already registered */
2579 if (hm->options[option])
2582 hm->options[option] = options;
2583 hm->trace[option] = trace;
2585 /* Set global variable */
2586 im->hbh_enabled = 1;
2592 ip6_hbh_unregister_option (u8 option)
2594 ip6_main_t *im = &ip6_main;
2595 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2597 ASSERT ((u32) option < ARRAY_LEN (hm->options));
2599 /* Not registered */
2600 if (!hm->options[option])
2603 hm->options[option] = NULL;
2604 hm->trace[option] = NULL;
2606 /* Disable global knob if this was the last option configured */
2609 for (i = 0; i < 256; i++)
2611 if (hm->options[option])
2618 im->hbh_enabled = 0;
2623 /* Global IP6 main. */
2624 ip6_main_t ip6_main;
2626 static clib_error_t *
2627 ip6_lookup_init (vlib_main_t * vm)
2629 ip6_main_t *im = &ip6_main;
2630 clib_error_t *error;
2633 if ((error = vlib_call_init_function (vm, vnet_feature_init)))
2636 for (i = 0; i < ARRAY_LEN (im->fib_masks); i++)
2643 for (j = 0; j < i0; j++)
2644 im->fib_masks[i].as_u32[j] = ~0;
2647 im->fib_masks[i].as_u32[i0] =
2648 clib_host_to_net_u32 (pow2_mask (i1) << (32 - i1));
2651 ip_lookup_init (&im->lookup_main, /* is_ip6 */ 1);
2653 if (im->lookup_table_nbuckets == 0)
2654 im->lookup_table_nbuckets = IP6_FIB_DEFAULT_HASH_NUM_BUCKETS;
2656 im->lookup_table_nbuckets = 1 << max_log2 (im->lookup_table_nbuckets);
2658 if (im->lookup_table_size == 0)
2659 im->lookup_table_size = IP6_FIB_DEFAULT_HASH_MEMORY_SIZE;
2661 clib_bihash_init_24_8 (&(im->ip6_table[IP6_FIB_TABLE_FWDING].ip6_hash),
2662 "ip6 FIB fwding table",
2663 im->lookup_table_nbuckets, im->lookup_table_size);
2664 clib_bihash_init_24_8 (&im->ip6_table[IP6_FIB_TABLE_NON_FWDING].ip6_hash,
2665 "ip6 FIB non-fwding table",
2666 im->lookup_table_nbuckets, im->lookup_table_size);
2667 clib_bihash_init_40_8 (&im->ip6_mtable.ip6_mhash,
2669 im->lookup_table_nbuckets, im->lookup_table_size);
2671 /* Create FIB with index 0 and table id of 0. */
2672 fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6, 0,
2673 FIB_SOURCE_DEFAULT_ROUTE);
2674 mfib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6, 0,
2675 MFIB_SOURCE_DEFAULT_ROUTE);
2679 pn = pg_get_node (ip6_lookup_node.index);
2680 pn->unformat_edit = unformat_pg_ip6_header;
2683 /* Unless explicitly configured, don't process HBH options */
2684 im->hbh_enabled = 0;
2687 icmp6_neighbor_solicitation_header_t p;
2689 clib_memset (&p, 0, sizeof (p));
2691 p.ip.ip_version_traffic_class_and_flow_label =
2692 clib_host_to_net_u32 (0x6 << 28);
2693 p.ip.payload_length =
2694 clib_host_to_net_u16 (sizeof (p) -
2696 (icmp6_neighbor_solicitation_header_t, neighbor));
2697 p.ip.protocol = IP_PROTOCOL_ICMP6;
2698 p.ip.hop_limit = 255;
2699 ip6_set_solicited_node_multicast_address (&p.ip.dst_address, 0);
2701 p.neighbor.icmp.type = ICMP6_neighbor_solicitation;
2703 p.link_layer_option.header.type =
2704 ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address;
2705 p.link_layer_option.header.n_data_u64s =
2706 sizeof (p.link_layer_option) / sizeof (u64);
2708 vlib_packet_template_init (vm,
2709 &im->discover_neighbor_packet_template,
2711 /* alloc chunk size */ 8,
2712 "ip6 neighbor discovery");
2718 VLIB_INIT_FUNCTION (ip6_lookup_init);
2721 ip6_link_local_address_from_ethernet_mac_address (ip6_address_t * ip,
2724 ip->as_u64[0] = clib_host_to_net_u64 (0xFE80000000000000ULL);
2725 /* Invert the "u" bit */
2726 ip->as_u8[8] = mac[0] ^ (1 << 1);
2727 ip->as_u8[9] = mac[1];
2728 ip->as_u8[10] = mac[2];
2729 ip->as_u8[11] = 0xFF;
2730 ip->as_u8[12] = 0xFE;
2731 ip->as_u8[13] = mac[3];
2732 ip->as_u8[14] = mac[4];
2733 ip->as_u8[15] = mac[5];
2737 ip6_ethernet_mac_address_from_link_local_address (u8 * mac,
2740 /* Invert the previously inverted "u" bit */
2741 mac[0] = ip->as_u8[8] ^ (1 << 1);
2742 mac[1] = ip->as_u8[9];
2743 mac[2] = ip->as_u8[10];
2744 mac[3] = ip->as_u8[13];
2745 mac[4] = ip->as_u8[14];
2746 mac[5] = ip->as_u8[15];
2749 static clib_error_t *
2750 test_ip6_link_command_fn (vlib_main_t * vm,
2751 unformat_input_t * input, vlib_cli_command_t * cmd)
2754 ip6_address_t _a, *a = &_a;
2756 if (unformat (input, "%U", unformat_ethernet_address, mac))
2758 ip6_link_local_address_from_ethernet_mac_address (a, mac);
2759 vlib_cli_output (vm, "Link local address: %U", format_ip6_address, a);
2760 ip6_ethernet_mac_address_from_link_local_address (mac, a);
2761 vlib_cli_output (vm, "Original MAC address: %U",
2762 format_ethernet_address, mac);
2769 * This command converts the given MAC Address into an IPv6 link-local
2773 * Example of how to create an IPv6 link-local address:
2774 * @cliexstart{test ip6 link 16:d9:e0:91:79:86}
2775 * Link local address: fe80::14d9:e0ff:fe91:7986
2776 * Original MAC address: 16:d9:e0:91:79:86
2780 VLIB_CLI_COMMAND (test_link_command, static) =
2782 .path = "test ip6 link",
2783 .function = test_ip6_link_command_fn,
2784 .short_help = "test ip6 link <mac-address>",
2789 vnet_set_ip6_flow_hash (u32 table_id, u32 flow_hash_config)
2793 fib_index = fib_table_find (FIB_PROTOCOL_IP6, table_id);
2795 if (~0 == fib_index)
2796 return VNET_API_ERROR_NO_SUCH_FIB;
2798 fib_table_set_flow_hash_config (fib_index, FIB_PROTOCOL_IP6,
2804 static clib_error_t *
2805 set_ip6_flow_hash_command_fn (vlib_main_t * vm,
2806 unformat_input_t * input,
2807 vlib_cli_command_t * cmd)
2811 u32 flow_hash_config = 0;
2814 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
2816 if (unformat (input, "table %d", &table_id))
2819 else if (unformat (input, #a)) { flow_hash_config |= v; matched=1;}
2820 foreach_flow_hash_bit
2827 return clib_error_return (0, "unknown input `%U'",
2828 format_unformat_error, input);
2830 rv = vnet_set_ip6_flow_hash (table_id, flow_hash_config);
2837 return clib_error_return (0, "no such FIB table %d", table_id);
2840 clib_warning ("BUG: illegal flow hash config 0x%x", flow_hash_config);
2848 * Configure the set of IPv6 fields used by the flow hash.
2852 * Example of how to set the flow hash on a given table:
2853 * @cliexcmd{set ip6 flow-hash table 8 dst sport dport proto}
2855 * Example of display the configured flow hash:
2856 * @cliexstart{show ip6 fib}
2857 * ipv6-VRF:0, fib_index 0, flow hash: src dst sport dport proto
2860 * [@0]: dpo-load-balance: [index:5 buckets:1 uRPF:5 to:[0:0]]
2861 * [0] [@0]: dpo-drop ip6
2864 * [@0]: dpo-load-balance: [index:10 buckets:1 uRPF:10 to:[0:0]]
2865 * [0] [@2]: dpo-receive
2868 * [@0]: dpo-load-balance: [index:8 buckets:1 uRPF:8 to:[0:0]]
2869 * [0] [@2]: dpo-receive
2872 * [@0]: dpo-load-balance: [index:7 buckets:1 uRPF:7 to:[0:0]]
2873 * [0] [@2]: dpo-receive
2876 * [@0]: dpo-load-balance: [index:9 buckets:1 uRPF:9 to:[0:0]]
2877 * [0] [@2]: dpo-receive
2878 * ff02::1:ff00:0/104
2880 * [@0]: dpo-load-balance: [index:6 buckets:1 uRPF:6 to:[0:0]]
2881 * [0] [@2]: dpo-receive
2882 * ipv6-VRF:8, fib_index 1, flow hash: dst sport dport proto
2885 * [@0]: dpo-load-balance: [index:21 buckets:1 uRPF:20 to:[0:0]]
2886 * [0] [@0]: dpo-drop ip6
2889 * [@0]: dpo-load-balance: [index:27 buckets:1 uRPF:26 to:[0:0]]
2890 * [0] [@4]: ipv6-glean: af_packet0
2893 * [@0]: dpo-load-balance: [index:28 buckets:1 uRPF:27 to:[0:0]]
2894 * [0] [@2]: dpo-receive: @::a:1:1:0:7 on af_packet0
2897 * [@0]: dpo-load-balance: [index:26 buckets:1 uRPF:25 to:[0:0]]
2898 * [0] [@2]: dpo-receive
2899 * fe80::fe:3eff:fe3e:9222/128
2901 * [@0]: dpo-load-balance: [index:29 buckets:1 uRPF:28 to:[0:0]]
2902 * [0] [@2]: dpo-receive: fe80::fe:3eff:fe3e:9222 on af_packet0
2905 * [@0]: dpo-load-balance: [index:24 buckets:1 uRPF:23 to:[0:0]]
2906 * [0] [@2]: dpo-receive
2909 * [@0]: dpo-load-balance: [index:23 buckets:1 uRPF:22 to:[0:0]]
2910 * [0] [@2]: dpo-receive
2913 * [@0]: dpo-load-balance: [index:25 buckets:1 uRPF:24 to:[0:0]]
2914 * [0] [@2]: dpo-receive
2915 * ff02::1:ff00:0/104
2917 * [@0]: dpo-load-balance: [index:22 buckets:1 uRPF:21 to:[0:0]]
2918 * [0] [@2]: dpo-receive
2923 VLIB_CLI_COMMAND (set_ip6_flow_hash_command, static) =
2925 .path = "set ip6 flow-hash",
2927 "set ip6 flow-hash table <table-id> [src] [dst] [sport] [dport] [proto] [reverse]",
2928 .function = set_ip6_flow_hash_command_fn,
2932 static clib_error_t *
2933 show_ip6_local_command_fn (vlib_main_t * vm,
2934 unformat_input_t * input, vlib_cli_command_t * cmd)
2936 ip6_main_t *im = &ip6_main;
2937 ip_lookup_main_t *lm = &im->lookup_main;
2940 vlib_cli_output (vm, "Protocols handled by ip6_local");
2941 for (i = 0; i < ARRAY_LEN (lm->local_next_by_ip_protocol); i++)
2943 if (lm->local_next_by_ip_protocol[i] != IP_LOCAL_NEXT_PUNT)
2946 u32 node_index = vlib_get_node (vm,
2947 ip6_local_node.index)->
2948 next_nodes[lm->local_next_by_ip_protocol[i]];
2949 vlib_cli_output (vm, "%d: %U", i, format_vlib_node_name, vm,
2959 * Display the set of protocols handled by the local IPv6 stack.
2962 * Example of how to display local protocol table:
2963 * @cliexstart{show ip6 local}
2964 * Protocols handled by ip6_local
2972 VLIB_CLI_COMMAND (show_ip6_local, static) =
2974 .path = "show ip6 local",
2975 .function = show_ip6_local_command_fn,
2976 .short_help = "show ip6 local",
2981 vnet_set_ip6_classify_intfc (vlib_main_t * vm, u32 sw_if_index,
2984 vnet_main_t *vnm = vnet_get_main ();
2985 vnet_interface_main_t *im = &vnm->interface_main;
2986 ip6_main_t *ipm = &ip6_main;
2987 ip_lookup_main_t *lm = &ipm->lookup_main;
2988 vnet_classify_main_t *cm = &vnet_classify_main;
2989 ip6_address_t *if_addr;
2991 if (pool_is_free_index (im->sw_interfaces, sw_if_index))
2992 return VNET_API_ERROR_NO_MATCHING_INTERFACE;
2994 if (table_index != ~0 && pool_is_free_index (cm->tables, table_index))
2995 return VNET_API_ERROR_NO_SUCH_ENTRY;
2997 vec_validate (lm->classify_table_index_by_sw_if_index, sw_if_index);
2998 lm->classify_table_index_by_sw_if_index[sw_if_index] = table_index;
3000 if_addr = ip6_interface_first_address (ipm, sw_if_index);
3002 if (NULL != if_addr)
3004 fib_prefix_t pfx = {
3006 .fp_proto = FIB_PROTOCOL_IP6,
3007 .fp_addr.ip6 = *if_addr,
3011 fib_index = fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4,
3015 if (table_index != (u32) ~ 0)
3017 dpo_id_t dpo = DPO_INVALID;
3022 classify_dpo_create (DPO_PROTO_IP6, table_index));
3024 fib_table_entry_special_dpo_add (fib_index,
3026 FIB_SOURCE_CLASSIFY,
3027 FIB_ENTRY_FLAG_NONE, &dpo);
3032 fib_table_entry_special_remove (fib_index,
3033 &pfx, FIB_SOURCE_CLASSIFY);
3040 static clib_error_t *
3041 set_ip6_classify_command_fn (vlib_main_t * vm,
3042 unformat_input_t * input,
3043 vlib_cli_command_t * cmd)
3045 u32 table_index = ~0;
3046 int table_index_set = 0;
3047 u32 sw_if_index = ~0;
3050 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
3052 if (unformat (input, "table-index %d", &table_index))
3053 table_index_set = 1;
3054 else if (unformat (input, "intfc %U", unformat_vnet_sw_interface,
3055 vnet_get_main (), &sw_if_index))
3061 if (table_index_set == 0)
3062 return clib_error_return (0, "classify table-index must be specified");
3064 if (sw_if_index == ~0)
3065 return clib_error_return (0, "interface / subif must be specified");
3067 rv = vnet_set_ip6_classify_intfc (vm, sw_if_index, table_index);
3074 case VNET_API_ERROR_NO_MATCHING_INTERFACE:
3075 return clib_error_return (0, "No such interface");
3077 case VNET_API_ERROR_NO_SUCH_ENTRY:
3078 return clib_error_return (0, "No such classifier table");
3084 * Assign a classification table to an interface. The classification
3085 * table is created using the '<em>classify table</em>' and '<em>classify session</em>'
3086 * commands. Once the table is create, use this command to filter packets
3090 * Example of how to assign a classification table to an interface:
3091 * @cliexcmd{set ip6 classify intfc GigabitEthernet2/0/0 table-index 1}
3094 VLIB_CLI_COMMAND (set_ip6_classify_command, static) =
3096 .path = "set ip6 classify",
3098 "set ip6 classify intfc <interface> table-index <classify-idx>",
3099 .function = set_ip6_classify_command_fn,
3103 static clib_error_t *
3104 ip6_config (vlib_main_t * vm, unformat_input_t * input)
3106 ip6_main_t *im = &ip6_main;
3111 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
3113 if (unformat (input, "hash-buckets %d", &tmp))
3115 else if (unformat (input, "heap-size %U",
3116 unformat_memory_size, &heapsize))
3119 return clib_error_return (0, "unknown input '%U'",
3120 format_unformat_error, input);
3123 im->lookup_table_nbuckets = nbuckets;
3124 im->lookup_table_size = heapsize;
3129 VLIB_EARLY_CONFIG_FUNCTION (ip6_config, "ip6");
3132 * fd.io coding-style-patch-verification: ON
3135 * eval: (c-set-style "gnu")