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 #ifndef CLIB_MARCH_VARIANT
54 #include <vppinfra/bihash_template.c>
56 #include <vnet/ip/ip6_forward.h>
57 #include <vnet/interface_output.h>
59 /* Flag used by IOAM code. Classifier sets it pop-hop-by-hop checks it */
60 #define OI_DECAP 0x80000000
63 ip6_add_interface_routes (vnet_main_t * vnm, u32 sw_if_index,
64 ip6_main_t * im, u32 fib_index,
65 ip_interface_address_t * a)
67 ip_lookup_main_t *lm = &im->lookup_main;
68 ip6_address_t *address = ip_interface_address_get_address (lm, a);
70 .fp_len = a->address_length,
71 .fp_proto = FIB_PROTOCOL_IP6,
72 .fp_addr.ip6 = *address,
75 if (a->address_length < 128)
77 fib_table_entry_update_one_path (fib_index,
80 (FIB_ENTRY_FLAG_CONNECTED |
81 FIB_ENTRY_FLAG_ATTACHED),
83 /* No next-hop address */
85 /* invalid FIB index */
88 NULL, FIB_ROUTE_PATH_FLAG_NONE);
92 if (sw_if_index < vec_len (lm->classify_table_index_by_sw_if_index))
94 u32 classify_table_index =
95 lm->classify_table_index_by_sw_if_index[sw_if_index];
96 if (classify_table_index != (u32) ~ 0)
98 dpo_id_t dpo = DPO_INVALID;
103 classify_dpo_create (DPO_PROTO_IP6, classify_table_index));
105 fib_table_entry_special_dpo_add (fib_index,
108 FIB_ENTRY_FLAG_NONE, &dpo);
113 fib_table_entry_update_one_path (fib_index, &pfx,
114 FIB_SOURCE_INTERFACE,
115 (FIB_ENTRY_FLAG_CONNECTED |
116 FIB_ENTRY_FLAG_LOCAL),
120 1, NULL, FIB_ROUTE_PATH_FLAG_NONE);
124 ip6_del_interface_routes (ip6_main_t * im,
126 ip6_address_t * address, u32 address_length)
129 .fp_len = address_length,
130 .fp_proto = FIB_PROTOCOL_IP6,
131 .fp_addr.ip6 = *address,
134 if (pfx.fp_len < 128)
136 fib_table_entry_delete (fib_index, &pfx, FIB_SOURCE_INTERFACE);
141 fib_table_entry_delete (fib_index, &pfx, FIB_SOURCE_INTERFACE);
144 #ifndef CLIB_MARCH_VARIANT
146 ip6_sw_interface_enable_disable (u32 sw_if_index, u32 is_enable)
148 ip6_main_t *im = &ip6_main;
150 vec_validate_init_empty (im->ip_enabled_by_sw_if_index, sw_if_index, 0);
153 * enable/disable only on the 1<->0 transition
157 if (1 != ++im->ip_enabled_by_sw_if_index[sw_if_index])
162 /* The ref count is 0 when an address is removed from an interface that has
163 * no address - this is not a ciritical error */
164 if (0 == im->ip_enabled_by_sw_if_index[sw_if_index] ||
165 0 != --im->ip_enabled_by_sw_if_index[sw_if_index])
169 vnet_feature_enable_disable ("ip6-unicast", "ip6-not-enabled", sw_if_index,
172 vnet_feature_enable_disable ("ip6-multicast", "ip6-not-enabled",
173 sw_if_index, !is_enable, 0, 0);
176 /* get first interface address */
178 ip6_interface_first_address (ip6_main_t * im, u32 sw_if_index)
180 ip_lookup_main_t *lm = &im->lookup_main;
181 ip_interface_address_t *ia = 0;
182 ip6_address_t *result = 0;
185 foreach_ip_interface_address (lm, ia, sw_if_index,
186 1 /* honor unnumbered */,
188 ip6_address_t * a = ip_interface_address_get_address (lm, ia);
197 ip6_add_del_interface_address (vlib_main_t * vm,
199 ip6_address_t * address,
200 u32 address_length, u32 is_del)
202 vnet_main_t *vnm = vnet_get_main ();
203 ip6_main_t *im = &ip6_main;
204 ip_lookup_main_t *lm = &im->lookup_main;
206 u32 if_address_index;
207 ip6_address_fib_t ip6_af, *addr_fib = 0;
208 ip6_address_t ll_addr;
210 /* local0 interface doesn't support IP addressing */
211 if (sw_if_index == 0)
214 clib_error_create ("local0 interface doesn't support IP addressing");
217 if (ip6_address_is_link_local_unicast (address))
219 if (address_length != 128)
221 vnm->api_errno = VNET_API_ERROR_ADDRESS_LENGTH_MISMATCH;
224 ("prefix length of link-local address must be 128");
228 return ip6_neighbor_set_link_local_address (vm, sw_if_index,
233 ll_addr = ip6_neighbor_get_link_local_address (sw_if_index);
234 if (ip6_address_is_equal (&ll_addr, address))
236 vnm->api_errno = VNET_API_ERROR_ADDRESS_NOT_DELETABLE;
237 return clib_error_create ("address not deletable");
241 vnm->api_errno = VNET_API_ERROR_ADDRESS_NOT_FOUND_FOR_INTERFACE;
242 return clib_error_create ("address not found");
247 vec_validate (im->fib_index_by_sw_if_index, sw_if_index);
248 vec_validate (im->mfib_index_by_sw_if_index, sw_if_index);
250 ip6_addr_fib_init (&ip6_af, address,
251 vec_elt (im->fib_index_by_sw_if_index, sw_if_index));
252 vec_add1 (addr_fib, ip6_af);
257 /* When adding an address check that it does not conflict
258 with an existing address on any interface in this table. */
259 ip_interface_address_t *ia;
260 vnet_sw_interface_t *sif;
262 pool_foreach(sif, vnm->interface_main.sw_interfaces,
264 if (im->fib_index_by_sw_if_index[sw_if_index] ==
265 im->fib_index_by_sw_if_index[sif->sw_if_index])
267 foreach_ip_interface_address
268 (&im->lookup_main, ia, sif->sw_if_index,
269 0 /* honor unnumbered */ ,
272 ip_interface_address_get_address
273 (&im->lookup_main, ia);
274 if (ip6_destination_matches_route
275 (im, address, x, ia->address_length) ||
276 ip6_destination_matches_route (im,
281 vnm->api_errno = VNET_API_ERROR_DUPLICATE_IF_ADDRESS;
284 ("failed to add %U which conflicts with %U for interface %U",
285 format_ip6_address_and_length, address,
287 format_ip6_address_and_length, x,
289 format_vnet_sw_if_index_name, vnm,
299 uword elts_before = pool_elts (lm->if_address_pool);
301 error = ip_interface_address_add_del
302 (lm, sw_if_index, addr_fib, address_length, is_del, &if_address_index);
306 /* Pool did not grow: add duplicate address. */
307 if (elts_before == pool_elts (lm->if_address_pool))
311 ip6_sw_interface_enable_disable (sw_if_index, !is_del);
314 ip6_del_interface_routes (im, ip6_af.fib_index, address, address_length);
316 ip6_add_interface_routes (vnm, sw_if_index,
317 im, ip6_af.fib_index,
318 pool_elt_at_index (lm->if_address_pool,
322 ip6_add_del_interface_address_callback_t *cb;
323 vec_foreach (cb, im->add_del_interface_address_callbacks)
324 cb->function (im, cb->function_opaque, sw_if_index,
325 address, address_length, if_address_index, is_del);
335 static clib_error_t *
336 ip6_sw_interface_admin_up_down (vnet_main_t * vnm, u32 sw_if_index, u32 flags)
338 ip6_main_t *im = &ip6_main;
339 ip_interface_address_t *ia;
341 u32 is_admin_up, fib_index;
343 /* Fill in lookup tables with default table (0). */
344 vec_validate (im->fib_index_by_sw_if_index, sw_if_index);
346 vec_validate_init_empty (im->
347 lookup_main.if_address_pool_index_by_sw_if_index,
350 is_admin_up = (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) != 0;
352 fib_index = vec_elt (im->fib_index_by_sw_if_index, sw_if_index);
355 foreach_ip_interface_address (&im->lookup_main, ia, sw_if_index,
356 0 /* honor unnumbered */,
358 a = ip_interface_address_get_address (&im->lookup_main, ia);
360 ip6_add_interface_routes (vnm, sw_if_index,
364 ip6_del_interface_routes (im, fib_index,
365 a, ia->address_length);
372 VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION (ip6_sw_interface_admin_up_down);
374 /* Built-in ip6 unicast rx feature path definition */
376 VNET_FEATURE_ARC_INIT (ip6_unicast, static) =
378 .arc_name = "ip6-unicast",
379 .start_nodes = VNET_FEATURES ("ip6-input"),
380 .last_in_arc = "ip6-lookup",
381 .arc_index_ptr = &ip6_main.lookup_main.ucast_feature_arc_index,
384 VNET_FEATURE_INIT (ip6_flow_classify, static) =
386 .arc_name = "ip6-unicast",
387 .node_name = "ip6-flow-classify",
388 .runs_before = VNET_FEATURES ("ip6-inacl"),
391 VNET_FEATURE_INIT (ip6_inacl, static) =
393 .arc_name = "ip6-unicast",
394 .node_name = "ip6-inacl",
395 .runs_before = VNET_FEATURES ("ip6-policer-classify"),
398 VNET_FEATURE_INIT (ip6_policer_classify, static) =
400 .arc_name = "ip6-unicast",
401 .node_name = "ip6-policer-classify",
402 .runs_before = VNET_FEATURES ("ipsec6-input-feature"),
405 VNET_FEATURE_INIT (ip6_ipsec, static) =
407 .arc_name = "ip6-unicast",
408 .node_name = "ipsec6-input-feature",
409 .runs_before = VNET_FEATURES ("l2tp-decap"),
412 VNET_FEATURE_INIT (ip6_l2tp, static) =
414 .arc_name = "ip6-unicast",
415 .node_name = "l2tp-decap",
416 .runs_before = VNET_FEATURES ("vpath-input-ip6"),
419 VNET_FEATURE_INIT (ip6_vpath, static) =
421 .arc_name = "ip6-unicast",
422 .node_name = "vpath-input-ip6",
423 .runs_before = VNET_FEATURES ("ip6-vxlan-bypass"),
426 VNET_FEATURE_INIT (ip6_vxlan_bypass, static) =
428 .arc_name = "ip6-unicast",
429 .node_name = "ip6-vxlan-bypass",
430 .runs_before = VNET_FEATURES ("ip6-lookup"),
433 VNET_FEATURE_INIT (ip6_not_enabled, static) =
435 .arc_name = "ip6-unicast",
436 .node_name = "ip6-not-enabled",
437 .runs_before = VNET_FEATURES ("ip6-lookup"),
440 VNET_FEATURE_INIT (ip6_lookup, static) =
442 .arc_name = "ip6-unicast",
443 .node_name = "ip6-lookup",
444 .runs_before = 0, /*last feature*/
447 /* Built-in ip6 multicast rx feature path definition (none now) */
448 VNET_FEATURE_ARC_INIT (ip6_multicast, static) =
450 .arc_name = "ip6-multicast",
451 .start_nodes = VNET_FEATURES ("ip6-input"),
452 .last_in_arc = "ip6-mfib-forward-lookup",
453 .arc_index_ptr = &ip6_main.lookup_main.mcast_feature_arc_index,
456 VNET_FEATURE_INIT (ip6_vpath_mc, static) = {
457 .arc_name = "ip6-multicast",
458 .node_name = "vpath-input-ip6",
459 .runs_before = VNET_FEATURES ("ip6-mfib-forward-lookup"),
462 VNET_FEATURE_INIT (ip6_not_enabled_mc, static) = {
463 .arc_name = "ip6-multicast",
464 .node_name = "ip6-not-enabled",
465 .runs_before = VNET_FEATURES ("ip6-mfib-forward-lookup"),
468 VNET_FEATURE_INIT (ip6_mc_lookup, static) = {
469 .arc_name = "ip6-multicast",
470 .node_name = "ip6-mfib-forward-lookup",
471 .runs_before = 0, /* last feature */
474 /* Built-in ip4 tx feature path definition */
475 VNET_FEATURE_ARC_INIT (ip6_output, static) =
477 .arc_name = "ip6-output",
478 .start_nodes = VNET_FEATURES ("ip6-rewrite", "ip6-midchain", "ip6-dvr-dpo"),
479 .last_in_arc = "interface-output",
480 .arc_index_ptr = &ip6_main.lookup_main.output_feature_arc_index,
483 VNET_FEATURE_INIT (ip6_outacl, static) = {
484 .arc_name = "ip6-output",
485 .node_name = "ip6-outacl",
486 .runs_before = VNET_FEATURES ("ipsec6-output-feature"),
489 VNET_FEATURE_INIT (ip6_ipsec_output, static) = {
490 .arc_name = "ip6-output",
491 .node_name = "ipsec6-output-feature",
492 .runs_before = VNET_FEATURES ("interface-output"),
495 VNET_FEATURE_INIT (ip6_interface_output, static) = {
496 .arc_name = "ip6-output",
497 .node_name = "interface-output",
498 .runs_before = 0, /* not before any other features */
502 static clib_error_t *
503 ip6_sw_interface_add_del (vnet_main_t * vnm, u32 sw_if_index, u32 is_add)
505 ip6_main_t *im = &ip6_main;
507 vec_validate (im->fib_index_by_sw_if_index, sw_if_index);
508 vec_validate (im->mfib_index_by_sw_if_index, sw_if_index);
512 /* Ensure that IPv6 is disabled */
513 ip6_main_t *im6 = &ip6_main;
514 ip_lookup_main_t *lm6 = &im6->lookup_main;
515 ip_interface_address_t *ia = 0;
516 ip6_address_t *address;
517 vlib_main_t *vm = vlib_get_main ();
519 ip6_neighbor_sw_interface_add_del (vnm, sw_if_index, 0 /* is_add */ );
520 vnet_sw_interface_update_unnumbered (sw_if_index, ~0, 0);
522 foreach_ip_interface_address (lm6, ia, sw_if_index, 0,
524 address = ip_interface_address_get_address (lm6, ia);
525 ip6_add_del_interface_address(vm, sw_if_index, address, ia->address_length, 1);
528 ip6_mfib_interface_enable_disable (sw_if_index, 0);
531 vnet_feature_enable_disable ("ip6-unicast", "ip6-not-enabled", sw_if_index,
534 vnet_feature_enable_disable ("ip6-multicast", "ip6-not-enabled",
535 sw_if_index, is_add, 0, 0);
537 return /* no error */ 0;
540 VNET_SW_INTERFACE_ADD_DEL_FUNCTION (ip6_sw_interface_add_del);
542 VLIB_NODE_FN (ip6_lookup_node) (vlib_main_t * vm,
543 vlib_node_runtime_t * node,
544 vlib_frame_t * frame)
546 return ip6_lookup_inline (vm, node, frame);
549 static u8 *format_ip6_lookup_trace (u8 * s, va_list * args);
552 VLIB_REGISTER_NODE (ip6_lookup_node) =
554 .name = "ip6-lookup",
555 .vector_size = sizeof (u32),
556 .format_trace = format_ip6_lookup_trace,
557 .n_next_nodes = IP6_LOOKUP_N_NEXT,
558 .next_nodes = IP6_LOOKUP_NEXT_NODES,
562 VLIB_NODE_FN (ip6_load_balance_node) (vlib_main_t * vm,
563 vlib_node_runtime_t * node,
564 vlib_frame_t * frame)
566 vlib_combined_counter_main_t *cm = &load_balance_main.lbm_via_counters;
567 u32 n_left_from, n_left_to_next, *from, *to_next;
568 ip_lookup_next_t next;
569 u32 thread_index = vm->thread_index;
570 ip6_main_t *im = &ip6_main;
572 from = vlib_frame_vector_args (frame);
573 n_left_from = frame->n_vectors;
574 next = node->cached_next_index;
576 while (n_left_from > 0)
578 vlib_get_next_frame (vm, node, next, to_next, n_left_to_next);
581 while (n_left_from >= 4 && n_left_to_next >= 2)
583 ip_lookup_next_t next0, next1;
584 const load_balance_t *lb0, *lb1;
585 vlib_buffer_t *p0, *p1;
586 u32 pi0, lbi0, hc0, pi1, lbi1, hc1;
587 const ip6_header_t *ip0, *ip1;
588 const dpo_id_t *dpo0, *dpo1;
590 /* Prefetch next iteration. */
592 vlib_buffer_t *p2, *p3;
594 p2 = vlib_get_buffer (vm, from[2]);
595 p3 = vlib_get_buffer (vm, from[3]);
597 vlib_prefetch_buffer_header (p2, STORE);
598 vlib_prefetch_buffer_header (p3, STORE);
600 CLIB_PREFETCH (p2->data, sizeof (ip0[0]), STORE);
601 CLIB_PREFETCH (p3->data, sizeof (ip0[0]), STORE);
604 pi0 = to_next[0] = from[0];
605 pi1 = to_next[1] = from[1];
612 p0 = vlib_get_buffer (vm, pi0);
613 p1 = vlib_get_buffer (vm, pi1);
615 ip0 = vlib_buffer_get_current (p0);
616 ip1 = vlib_buffer_get_current (p1);
617 lbi0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
618 lbi1 = vnet_buffer (p1)->ip.adj_index[VLIB_TX];
620 lb0 = load_balance_get (lbi0);
621 lb1 = load_balance_get (lbi1);
624 * this node is for via FIBs we can re-use the hash value from the
625 * to node if present.
626 * We don't want to use the same hash value at each level in the recursion
627 * graph as that would lead to polarisation
631 if (PREDICT_FALSE (lb0->lb_n_buckets > 1))
633 if (PREDICT_TRUE (vnet_buffer (p0)->ip.flow_hash))
635 hc0 = vnet_buffer (p0)->ip.flow_hash =
636 vnet_buffer (p0)->ip.flow_hash >> 1;
640 hc0 = vnet_buffer (p0)->ip.flow_hash =
641 ip6_compute_flow_hash (ip0, lb0->lb_hash_config);
644 load_balance_get_fwd_bucket (lb0,
646 lb0->lb_n_buckets_minus_1));
650 dpo0 = load_balance_get_bucket_i (lb0, 0);
652 if (PREDICT_FALSE (lb1->lb_n_buckets > 1))
654 if (PREDICT_TRUE (vnet_buffer (p1)->ip.flow_hash))
656 hc1 = vnet_buffer (p1)->ip.flow_hash =
657 vnet_buffer (p1)->ip.flow_hash >> 1;
661 hc1 = vnet_buffer (p1)->ip.flow_hash =
662 ip6_compute_flow_hash (ip1, lb1->lb_hash_config);
665 load_balance_get_fwd_bucket (lb1,
667 lb1->lb_n_buckets_minus_1));
671 dpo1 = load_balance_get_bucket_i (lb1, 0);
674 next0 = dpo0->dpoi_next_node;
675 next1 = dpo1->dpoi_next_node;
677 /* Only process the HBH Option Header if explicitly configured to do so */
679 (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
681 next0 = (dpo_is_adj (dpo0) && im->hbh_enabled) ?
682 (ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next0;
684 /* Only process the HBH Option Header if explicitly configured to do so */
686 (ip1->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
688 next1 = (dpo_is_adj (dpo1) && im->hbh_enabled) ?
689 (ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next1;
692 vnet_buffer (p0)->ip.adj_index[VLIB_TX] = dpo0->dpoi_index;
693 vnet_buffer (p1)->ip.adj_index[VLIB_TX] = dpo1->dpoi_index;
695 vlib_increment_combined_counter
696 (cm, thread_index, lbi0, 1, vlib_buffer_length_in_chain (vm, p0));
697 vlib_increment_combined_counter
698 (cm, thread_index, lbi1, 1, vlib_buffer_length_in_chain (vm, p1));
700 vlib_validate_buffer_enqueue_x2 (vm, node, next,
701 to_next, n_left_to_next,
702 pi0, pi1, next0, next1);
705 while (n_left_from > 0 && n_left_to_next > 0)
707 ip_lookup_next_t next0;
708 const load_balance_t *lb0;
711 const ip6_header_t *ip0;
712 const dpo_id_t *dpo0;
721 p0 = vlib_get_buffer (vm, pi0);
723 ip0 = vlib_buffer_get_current (p0);
724 lbi0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
726 lb0 = load_balance_get (lbi0);
729 if (PREDICT_FALSE (lb0->lb_n_buckets > 1))
731 if (PREDICT_TRUE (vnet_buffer (p0)->ip.flow_hash))
733 hc0 = vnet_buffer (p0)->ip.flow_hash =
734 vnet_buffer (p0)->ip.flow_hash >> 1;
738 hc0 = vnet_buffer (p0)->ip.flow_hash =
739 ip6_compute_flow_hash (ip0, lb0->lb_hash_config);
742 load_balance_get_fwd_bucket (lb0,
744 lb0->lb_n_buckets_minus_1));
748 dpo0 = load_balance_get_bucket_i (lb0, 0);
751 next0 = dpo0->dpoi_next_node;
752 vnet_buffer (p0)->ip.adj_index[VLIB_TX] = dpo0->dpoi_index;
754 /* Only process the HBH Option Header if explicitly configured to do so */
756 (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
758 next0 = (dpo_is_adj (dpo0) && im->hbh_enabled) ?
759 (ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next0;
762 vlib_increment_combined_counter
763 (cm, thread_index, lbi0, 1, vlib_buffer_length_in_chain (vm, p0));
765 vlib_validate_buffer_enqueue_x1 (vm, node, next,
766 to_next, n_left_to_next,
770 vlib_put_next_frame (vm, node, next, n_left_to_next);
773 if (node->flags & VLIB_NODE_FLAG_TRACE)
774 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
776 return frame->n_vectors;
780 VLIB_REGISTER_NODE (ip6_load_balance_node) =
782 .name = "ip6-load-balance",
783 .vector_size = sizeof (u32),
784 .sibling_of = "ip6-lookup",
785 .format_trace = format_ip6_lookup_trace,
791 /* Adjacency taken. */
796 /* Packet data, possibly *after* rewrite. */
797 u8 packet_data[128 - 1 * sizeof (u32)];
799 ip6_forward_next_trace_t;
801 #ifndef CLIB_MARCH_VARIANT
803 format_ip6_forward_next_trace (u8 * s, va_list * args)
805 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
806 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
807 ip6_forward_next_trace_t *t = va_arg (*args, ip6_forward_next_trace_t *);
808 u32 indent = format_get_indent (s);
810 s = format (s, "%U%U",
811 format_white_space, indent,
812 format_ip6_header, t->packet_data, sizeof (t->packet_data));
818 format_ip6_lookup_trace (u8 * s, va_list * args)
820 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
821 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
822 ip6_forward_next_trace_t *t = va_arg (*args, ip6_forward_next_trace_t *);
823 u32 indent = format_get_indent (s);
825 s = format (s, "fib %d dpo-idx %d flow hash: 0x%08x",
826 t->fib_index, t->adj_index, t->flow_hash);
827 s = format (s, "\n%U%U",
828 format_white_space, indent,
829 format_ip6_header, t->packet_data, sizeof (t->packet_data));
835 format_ip6_rewrite_trace (u8 * s, va_list * args)
837 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
838 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
839 ip6_forward_next_trace_t *t = va_arg (*args, ip6_forward_next_trace_t *);
840 u32 indent = format_get_indent (s);
842 s = format (s, "tx_sw_if_index %d adj-idx %d : %U flow hash: 0x%08x",
843 t->fib_index, t->adj_index, format_ip_adjacency,
844 t->adj_index, FORMAT_IP_ADJACENCY_NONE, t->flow_hash);
845 s = format (s, "\n%U%U",
846 format_white_space, indent,
847 format_ip_adjacency_packet_data,
848 t->adj_index, t->packet_data, sizeof (t->packet_data));
852 /* Common trace function for all ip6-forward next nodes. */
853 #ifndef CLIB_MARCH_VARIANT
855 ip6_forward_next_trace (vlib_main_t * vm,
856 vlib_node_runtime_t * node,
857 vlib_frame_t * frame, vlib_rx_or_tx_t which_adj_index)
860 ip6_main_t *im = &ip6_main;
862 n_left = frame->n_vectors;
863 from = vlib_frame_vector_args (frame);
868 vlib_buffer_t *b0, *b1;
869 ip6_forward_next_trace_t *t0, *t1;
871 /* Prefetch next iteration. */
872 vlib_prefetch_buffer_with_index (vm, from[2], LOAD);
873 vlib_prefetch_buffer_with_index (vm, from[3], LOAD);
878 b0 = vlib_get_buffer (vm, bi0);
879 b1 = vlib_get_buffer (vm, bi1);
881 if (b0->flags & VLIB_BUFFER_IS_TRACED)
883 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
884 t0->adj_index = vnet_buffer (b0)->ip.adj_index[which_adj_index];
885 t0->flow_hash = vnet_buffer (b0)->ip.flow_hash;
887 (vnet_buffer (b0)->sw_if_index[VLIB_TX] !=
888 (u32) ~ 0) ? vnet_buffer (b0)->sw_if_index[VLIB_TX] :
889 vec_elt (im->fib_index_by_sw_if_index,
890 vnet_buffer (b0)->sw_if_index[VLIB_RX]);
892 clib_memcpy_fast (t0->packet_data,
893 vlib_buffer_get_current (b0),
894 sizeof (t0->packet_data));
896 if (b1->flags & VLIB_BUFFER_IS_TRACED)
898 t1 = vlib_add_trace (vm, node, b1, sizeof (t1[0]));
899 t1->adj_index = vnet_buffer (b1)->ip.adj_index[which_adj_index];
900 t1->flow_hash = vnet_buffer (b1)->ip.flow_hash;
902 (vnet_buffer (b1)->sw_if_index[VLIB_TX] !=
903 (u32) ~ 0) ? vnet_buffer (b1)->sw_if_index[VLIB_TX] :
904 vec_elt (im->fib_index_by_sw_if_index,
905 vnet_buffer (b1)->sw_if_index[VLIB_RX]);
907 clib_memcpy_fast (t1->packet_data,
908 vlib_buffer_get_current (b1),
909 sizeof (t1->packet_data));
919 ip6_forward_next_trace_t *t0;
923 b0 = vlib_get_buffer (vm, bi0);
925 if (b0->flags & VLIB_BUFFER_IS_TRACED)
927 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
928 t0->adj_index = vnet_buffer (b0)->ip.adj_index[which_adj_index];
929 t0->flow_hash = vnet_buffer (b0)->ip.flow_hash;
931 (vnet_buffer (b0)->sw_if_index[VLIB_TX] !=
932 (u32) ~ 0) ? vnet_buffer (b0)->sw_if_index[VLIB_TX] :
933 vec_elt (im->fib_index_by_sw_if_index,
934 vnet_buffer (b0)->sw_if_index[VLIB_RX]);
936 clib_memcpy_fast (t0->packet_data,
937 vlib_buffer_get_current (b0),
938 sizeof (t0->packet_data));
945 /* Compute TCP/UDP/ICMP6 checksum in software. */
947 ip6_tcp_udp_icmp_compute_checksum (vlib_main_t * vm, vlib_buffer_t * p0,
948 ip6_header_t * ip0, int *bogus_lengthp)
951 u16 sum16, payload_length_host_byte_order;
952 u32 i, n_this_buffer, n_bytes_left;
953 u32 headers_size = sizeof (ip0[0]);
954 void *data_this_buffer;
956 ASSERT (bogus_lengthp);
959 /* Initialize checksum with ip header. */
960 sum0 = ip0->payload_length + clib_host_to_net_u16 (ip0->protocol);
961 payload_length_host_byte_order = clib_net_to_host_u16 (ip0->payload_length);
962 data_this_buffer = (void *) (ip0 + 1);
964 for (i = 0; i < ARRAY_LEN (ip0->src_address.as_uword); i++)
966 sum0 = ip_csum_with_carry (sum0,
967 clib_mem_unaligned (&ip0->
968 src_address.as_uword[i],
971 ip_csum_with_carry (sum0,
972 clib_mem_unaligned (&ip0->dst_address.as_uword[i],
976 /* some icmp packets may come with a "router alert" hop-by-hop extension header (e.g., mldv2 packets)
977 * or UDP-Ping packets */
978 if (PREDICT_FALSE (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
981 ip6_hop_by_hop_ext_t *ext_hdr =
982 (ip6_hop_by_hop_ext_t *) data_this_buffer;
984 /* validate really icmp6 next */
985 ASSERT ((ext_hdr->next_hdr == IP_PROTOCOL_ICMP6)
986 || (ext_hdr->next_hdr == IP_PROTOCOL_UDP));
988 skip_bytes = 8 * (1 + ext_hdr->n_data_u64s);
989 data_this_buffer = (void *) ((u8 *) data_this_buffer + skip_bytes);
991 payload_length_host_byte_order -= skip_bytes;
992 headers_size += skip_bytes;
995 n_bytes_left = n_this_buffer = payload_length_host_byte_order;
996 if (p0 && n_this_buffer + headers_size > p0->current_length)
999 headers_size ? p0->current_length - headers_size : 0;
1002 sum0 = ip_incremental_checksum (sum0, data_this_buffer, n_this_buffer);
1003 n_bytes_left -= n_this_buffer;
1004 if (n_bytes_left == 0)
1007 if (!(p0->flags & VLIB_BUFFER_NEXT_PRESENT))
1012 p0 = vlib_get_buffer (vm, p0->next_buffer);
1013 data_this_buffer = vlib_buffer_get_current (p0);
1014 n_this_buffer = clib_min (p0->current_length, n_bytes_left);
1017 sum16 = ~ip_csum_fold (sum0);
1023 ip6_tcp_udp_icmp_validate_checksum (vlib_main_t * vm, vlib_buffer_t * p0)
1025 ip6_header_t *ip0 = vlib_buffer_get_current (p0);
1030 /* some icmp packets may come with a "router alert" hop-by-hop extension header (e.g., mldv2 packets) */
1031 ASSERT (ip0->protocol == IP_PROTOCOL_TCP
1032 || ip0->protocol == IP_PROTOCOL_ICMP6
1033 || ip0->protocol == IP_PROTOCOL_UDP
1034 || ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS);
1036 udp0 = (void *) (ip0 + 1);
1037 if (ip0->protocol == IP_PROTOCOL_UDP && udp0->checksum == 0)
1039 p0->flags |= (VNET_BUFFER_F_L4_CHECKSUM_COMPUTED
1040 | VNET_BUFFER_F_L4_CHECKSUM_CORRECT);
1044 sum16 = ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip0, &bogus_length);
1046 p0->flags |= (VNET_BUFFER_F_L4_CHECKSUM_COMPUTED
1047 | ((sum16 == 0) << VNET_BUFFER_F_LOG2_L4_CHECKSUM_CORRECT));
1054 * @brief returns number of links on which src is reachable.
1057 ip6_urpf_loose_check (ip6_main_t * im, vlib_buffer_t * b, ip6_header_t * i)
1059 const load_balance_t *lb0;
1063 fib_index = vec_elt (im->fib_index_by_sw_if_index,
1064 vnet_buffer (b)->sw_if_index[VLIB_RX]);
1066 (vnet_buffer (b)->sw_if_index[VLIB_TX] == (u32) ~ 0) ?
1067 fib_index : vnet_buffer (b)->sw_if_index[VLIB_TX];
1069 lbi = ip6_fib_table_fwding_lookup (im, fib_index, &i->src_address);
1070 lb0 = load_balance_get (lbi);
1072 return (fib_urpf_check_size (lb0->lb_urpf));
1076 ip6_next_proto_is_tcp_udp (vlib_buffer_t * p0, ip6_header_t * ip0,
1080 proto0 = ip6_locate_header (p0, ip0, IP_PROTOCOL_UDP, udp_offset0);
1081 if (proto0 != IP_PROTOCOL_UDP)
1083 proto0 = ip6_locate_header (p0, ip0, IP_PROTOCOL_TCP, udp_offset0);
1084 proto0 = (proto0 == IP_PROTOCOL_TCP) ? proto0 : 0;
1090 VNET_FEATURE_ARC_INIT (ip6_local) =
1092 .arc_name = "ip6-local",
1093 .start_nodes = VNET_FEATURES ("ip6-local"),
1098 ip6_local_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
1099 vlib_frame_t * frame, int head_of_feature_arc)
1101 ip6_main_t *im = &ip6_main;
1102 ip_lookup_main_t *lm = &im->lookup_main;
1103 u32 *from, n_left_from;
1104 vlib_node_runtime_t *error_node =
1105 vlib_node_get_runtime (vm, ip6_input_node.index);
1106 u8 arc_index = vnet_feat_arc_ip6_local.feature_arc_index;
1107 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
1108 u16 nexts[VLIB_FRAME_SIZE], *next;
1110 from = vlib_frame_vector_args (frame);
1111 n_left_from = frame->n_vectors;
1113 if (node->flags & VLIB_NODE_FLAG_TRACE)
1114 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
1116 vlib_get_buffers (vm, from, bufs, n_left_from);
1120 while (n_left_from > 2)
1122 /* Prefetch next iteration. */
1123 if (n_left_from >= 6)
1125 vlib_prefetch_buffer_header (b[4], STORE);
1126 vlib_prefetch_buffer_header (b[5], STORE);
1127 vlib_prefetch_buffer_data (b[2], LOAD);
1128 vlib_prefetch_buffer_data (b[3], LOAD);
1132 error[0] = IP6_ERROR_UNKNOWN_PROTOCOL;
1133 error[1] = IP6_ERROR_UNKNOWN_PROTOCOL;
1135 ip6_header_t *ip[2];
1136 ip[0] = vlib_buffer_get_current (b[0]);
1137 ip[1] = vlib_buffer_get_current (b[1]);
1139 if (head_of_feature_arc)
1141 vnet_buffer (b[0])->l3_hdr_offset = b[0]->current_data;
1142 vnet_buffer (b[1])->l3_hdr_offset = b[1]->current_data;
1145 type[0] = lm->builtin_protocol_by_ip_protocol[ip[0]->protocol];
1146 type[1] = lm->builtin_protocol_by_ip_protocol[ip[1]->protocol];
1149 flags[0] = b[0]->flags;
1150 flags[1] = b[1]->flags;
1152 u32 good_l4_csum[2];
1154 flags[0] & (VNET_BUFFER_F_L4_CHECKSUM_CORRECT |
1155 VNET_BUFFER_F_OFFLOAD_TCP_CKSUM |
1156 VNET_BUFFER_F_OFFLOAD_UDP_CKSUM);
1158 flags[1] & (VNET_BUFFER_F_L4_CHECKSUM_CORRECT |
1159 VNET_BUFFER_F_OFFLOAD_TCP_CKSUM |
1160 VNET_BUFFER_F_OFFLOAD_UDP_CKSUM);
1162 u32 udp_offset[2] = { };
1165 ip6_next_proto_is_tcp_udp (b[0], ip[0], &udp_offset[0]);
1167 ip6_next_proto_is_tcp_udp (b[1], ip[1], &udp_offset[1]);
1168 i16 len_diff[2] = { 0 };
1169 if (PREDICT_TRUE (is_tcp_udp[0]))
1172 (udp_header_t *) ((u8 *) ip[0] + udp_offset[0]);
1173 good_l4_csum[0] |= type[0] == IP_BUILTIN_PROTOCOL_UDP
1174 && udp->checksum == 0;
1175 /* optimistically verify UDP length. */
1176 u16 ip_len, udp_len;
1177 ip_len = clib_net_to_host_u16 (ip[0]->payload_length);
1178 udp_len = clib_net_to_host_u16 (udp->length);
1179 len_diff[0] = ip_len - udp_len;
1181 if (PREDICT_TRUE (is_tcp_udp[1]))
1184 (udp_header_t *) ((u8 *) ip[1] + udp_offset[1]);
1185 good_l4_csum[1] |= type[1] == IP_BUILTIN_PROTOCOL_UDP
1186 && udp->checksum == 0;
1187 /* optimistically verify UDP length. */
1188 u16 ip_len, udp_len;
1189 ip_len = clib_net_to_host_u16 (ip[1]->payload_length);
1190 udp_len = clib_net_to_host_u16 (udp->length);
1191 len_diff[1] = ip_len - udp_len;
1194 good_l4_csum[0] |= type[0] == IP_BUILTIN_PROTOCOL_UNKNOWN;
1195 good_l4_csum[1] |= type[1] == IP_BUILTIN_PROTOCOL_UNKNOWN;
1197 len_diff[0] = type[0] == IP_BUILTIN_PROTOCOL_UDP ? len_diff[0] : 0;
1198 len_diff[1] = type[1] == IP_BUILTIN_PROTOCOL_UDP ? len_diff[1] : 0;
1201 need_csum[0] = type[0] != IP_BUILTIN_PROTOCOL_UNKNOWN
1203 && !(flags[0] & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED);
1204 need_csum[1] = type[1] != IP_BUILTIN_PROTOCOL_UNKNOWN
1206 && !(flags[1] & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED);
1207 if (PREDICT_FALSE (need_csum[0]))
1209 flags[0] = ip6_tcp_udp_icmp_validate_checksum (vm, b[0]);
1210 good_l4_csum[0] = flags[0] & VNET_BUFFER_F_L4_CHECKSUM_CORRECT;
1212 if (PREDICT_FALSE (need_csum[1]))
1214 flags[1] = ip6_tcp_udp_icmp_validate_checksum (vm, b[1]);
1215 good_l4_csum[1] = flags[1] & VNET_BUFFER_F_L4_CHECKSUM_CORRECT;
1218 error[0] = IP6_ERROR_UNKNOWN_PROTOCOL;
1219 error[0] = len_diff[0] < 0 ? IP6_ERROR_UDP_LENGTH : error[0];
1220 error[1] = IP6_ERROR_UNKNOWN_PROTOCOL;
1221 error[1] = len_diff[1] < 0 ? IP6_ERROR_UDP_LENGTH : error[1];
1223 STATIC_ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_UDP ==
1224 IP6_ERROR_UDP_CHECKSUM,
1225 "Wrong IP6 errors constants");
1226 STATIC_ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_ICMP ==
1227 IP6_ERROR_ICMP_CHECKSUM,
1228 "Wrong IP6 errors constants");
1231 !good_l4_csum[0] ? IP6_ERROR_UDP_CHECKSUM + type[0] : error[0];
1233 !good_l4_csum[1] ? IP6_ERROR_UDP_CHECKSUM + type[1] : error[1];
1235 /* Drop packets from unroutable hosts. */
1236 /* If this is a neighbor solicitation (ICMP), skip source RPF check */
1238 unroutable[0] = error[0] == IP6_ERROR_UNKNOWN_PROTOCOL
1239 && type[0] != IP_BUILTIN_PROTOCOL_ICMP
1240 && !ip6_address_is_link_local_unicast (&ip[0]->src_address);
1241 unroutable[1] = error[1] == IP6_ERROR_UNKNOWN_PROTOCOL
1242 && type[1] != IP_BUILTIN_PROTOCOL_ICMP
1243 && !ip6_address_is_link_local_unicast (&ip[1]->src_address);
1244 if (PREDICT_FALSE (unroutable[0]))
1247 !ip6_urpf_loose_check (im, b[0],
1248 ip[0]) ? IP6_ERROR_SRC_LOOKUP_MISS
1251 if (PREDICT_FALSE (unroutable[1]))
1254 !ip6_urpf_loose_check (im, b[1],
1255 ip[1]) ? IP6_ERROR_SRC_LOOKUP_MISS
1259 vnet_buffer (b[0])->ip.fib_index =
1260 vnet_buffer (b[0])->sw_if_index[VLIB_TX] != ~0 ?
1261 vnet_buffer (b[0])->sw_if_index[VLIB_TX] :
1262 vnet_buffer (b[0])->ip.fib_index;
1263 vnet_buffer (b[1])->ip.fib_index =
1264 vnet_buffer (b[1])->sw_if_index[VLIB_TX] != ~0 ?
1265 vnet_buffer (b[1])->sw_if_index[VLIB_TX] :
1266 vnet_buffer (b[1])->ip.fib_index;
1267 } /* head_of_feature_arc */
1269 next[0] = lm->local_next_by_ip_protocol[ip[0]->protocol];
1271 error[0] != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next[0];
1272 next[1] = lm->local_next_by_ip_protocol[ip[1]->protocol];
1274 error[1] != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next[1];
1276 b[0]->error = error_node->errors[0];
1277 b[1]->error = error_node->errors[1];
1279 if (head_of_feature_arc)
1282 ip6_unknown[0] = error[0] == (u8) IP6_ERROR_UNKNOWN_PROTOCOL;
1283 ip6_unknown[1] = error[1] == (u8) IP6_ERROR_UNKNOWN_PROTOCOL;
1284 if (PREDICT_TRUE (ip6_unknown[0]))
1286 u32 next32 = next[0];
1287 vnet_feature_arc_start (arc_index,
1288 vnet_buffer (b[0])->sw_if_index
1289 [VLIB_RX], &next32, b[0]);
1292 if (PREDICT_TRUE (ip6_unknown[1]))
1294 u32 next32 = next[1];
1295 vnet_feature_arc_start (arc_index,
1296 vnet_buffer (b[1])->sw_if_index
1297 [VLIB_RX], &next32, b[1]);
1311 error = IP6_ERROR_UNKNOWN_PROTOCOL;
1314 ip = vlib_buffer_get_current (b[0]);
1316 if (head_of_feature_arc)
1318 vnet_buffer (b[0])->l3_hdr_offset = b[0]->current_data;
1319 u8 type = lm->builtin_protocol_by_ip_protocol[ip->protocol];
1321 u32 flags = b[0]->flags;
1323 flags & (VNET_BUFFER_F_L4_CHECKSUM_CORRECT |
1324 VNET_BUFFER_F_OFFLOAD_TCP_CKSUM |
1325 VNET_BUFFER_F_OFFLOAD_UDP_CKSUM);
1329 u8 is_tcp_udp = ip6_next_proto_is_tcp_udp (b[0], ip, &udp_offset);
1330 if (PREDICT_TRUE (is_tcp_udp))
1332 udp_header_t *udp = (udp_header_t *) ((u8 *) ip + udp_offset);
1333 /* Don't verify UDP checksum for packets with explicit zero checksum. */
1334 good_l4_csum |= type == IP_BUILTIN_PROTOCOL_UDP
1335 && udp->checksum == 0;
1336 /* optimistically verify UDP length. */
1337 u16 ip_len, udp_len;
1338 ip_len = clib_net_to_host_u16 (ip->payload_length);
1339 udp_len = clib_net_to_host_u16 (udp->length);
1340 len_diff = ip_len - udp_len;
1343 good_l4_csum |= type == IP_BUILTIN_PROTOCOL_UNKNOWN;
1344 len_diff = type == IP_BUILTIN_PROTOCOL_UDP ? len_diff : 0;
1346 u8 need_csum = type != IP_BUILTIN_PROTOCOL_UNKNOWN && !good_l4_csum
1347 && !(flags & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED);
1348 if (PREDICT_FALSE (need_csum))
1350 flags = ip6_tcp_udp_icmp_validate_checksum (vm, b[0]);
1351 good_l4_csum = flags & VNET_BUFFER_F_L4_CHECKSUM_CORRECT;
1354 error = IP6_ERROR_UNKNOWN_PROTOCOL;
1355 error = len_diff < 0 ? IP6_ERROR_UDP_LENGTH : error;
1357 STATIC_ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_UDP ==
1358 IP6_ERROR_UDP_CHECKSUM,
1359 "Wrong IP6 errors constants");
1360 STATIC_ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_ICMP ==
1361 IP6_ERROR_ICMP_CHECKSUM,
1362 "Wrong IP6 errors constants");
1364 error = !good_l4_csum ? IP6_ERROR_UDP_CHECKSUM + type : error;
1366 /* Drop packets from unroutable hosts. */
1367 /* If this is a neighbor solicitation (ICMP), skip source RPF check */
1368 u8 unroutable = error == IP6_ERROR_UNKNOWN_PROTOCOL
1369 && type != IP_BUILTIN_PROTOCOL_ICMP
1370 && !ip6_address_is_link_local_unicast (&ip->src_address);
1371 if (PREDICT_FALSE (unroutable))
1374 !ip6_urpf_loose_check (im, b[0],
1375 ip) ? IP6_ERROR_SRC_LOOKUP_MISS :
1379 vnet_buffer (b[0])->ip.fib_index =
1380 vnet_buffer (b[0])->sw_if_index[VLIB_TX] != ~0 ?
1381 vnet_buffer (b[0])->sw_if_index[VLIB_TX] :
1382 vnet_buffer (b[0])->ip.fib_index;
1383 } /* head_of_feature_arc */
1385 next[0] = lm->local_next_by_ip_protocol[ip->protocol];
1387 error != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next[0];
1389 b[0]->error = error_node->errors[0];
1391 if (head_of_feature_arc)
1393 if (PREDICT_TRUE (error == (u8) IP6_ERROR_UNKNOWN_PROTOCOL))
1395 u32 next32 = next[0];
1396 vnet_feature_arc_start (arc_index,
1397 vnet_buffer (b[0])->sw_if_index
1398 [VLIB_RX], &next32, b[0]);
1409 vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors);
1410 return frame->n_vectors;
1413 VLIB_NODE_FN (ip6_local_node) (vlib_main_t * vm, vlib_node_runtime_t * node,
1414 vlib_frame_t * frame)
1416 return ip6_local_inline (vm, node, frame, 1 /* head of feature arc */ );
1420 VLIB_REGISTER_NODE (ip6_local_node) =
1422 .name = "ip6-local",
1423 .vector_size = sizeof (u32),
1424 .format_trace = format_ip6_forward_next_trace,
1425 .n_next_nodes = IP_LOCAL_N_NEXT,
1428 [IP_LOCAL_NEXT_DROP] = "ip6-drop",
1429 [IP_LOCAL_NEXT_PUNT] = "ip6-punt",
1430 [IP_LOCAL_NEXT_UDP_LOOKUP] = "ip6-udp-lookup",
1431 [IP_LOCAL_NEXT_ICMP] = "ip6-icmp-input",
1432 [IP_LOCAL_NEXT_REASSEMBLY] = "ip6-reassembly",
1437 VLIB_NODE_FN (ip6_local_end_of_arc_node) (vlib_main_t * vm,
1438 vlib_node_runtime_t * node,
1439 vlib_frame_t * frame)
1441 return ip6_local_inline (vm, node, frame, 0 /* head of feature arc */ );
1445 VLIB_REGISTER_NODE (ip6_local_end_of_arc_node) = {
1446 .name = "ip6-local-end-of-arc",
1447 .vector_size = sizeof (u32),
1449 .format_trace = format_ip6_forward_next_trace,
1450 .sibling_of = "ip6-local",
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 */
1460 #ifdef CLIB_MARCH_VARIANT
1461 extern vlib_node_registration_t ip6_local_node;
1466 ip6_register_protocol (u32 protocol, u32 node_index)
1468 vlib_main_t *vm = vlib_get_main ();
1469 ip6_main_t *im = &ip6_main;
1470 ip_lookup_main_t *lm = &im->lookup_main;
1472 ASSERT (protocol < ARRAY_LEN (lm->local_next_by_ip_protocol));
1473 lm->local_next_by_ip_protocol[protocol] =
1474 vlib_node_add_next (vm, ip6_local_node.index, node_index);
1478 ip6_probe_neighbor (vlib_main_t * vm, ip6_address_t * dst, u32 sw_if_index,
1481 vnet_main_t *vnm = vnet_get_main ();
1482 ip6_main_t *im = &ip6_main;
1483 icmp6_neighbor_solicitation_header_t *h;
1485 ip_interface_address_t *ia;
1486 ip_adjacency_t *adj;
1487 vnet_hw_interface_t *hi;
1488 vnet_sw_interface_t *si;
1494 si = vnet_get_sw_interface (vnm, sw_if_index);
1496 if (!(si->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP))
1498 return clib_error_return (0, "%U: interface %U down",
1499 format_ip6_address, dst,
1500 format_vnet_sw_if_index_name, vnm,
1505 ip6_interface_address_matching_destination (im, dst, sw_if_index, &ia);
1508 vnm->api_errno = VNET_API_ERROR_NO_MATCHING_INTERFACE;
1509 return clib_error_return
1510 (0, "no matching interface address for destination %U (interface %U)",
1511 format_ip6_address, dst,
1512 format_vnet_sw_if_index_name, vnm, sw_if_index);
1516 vlib_packet_template_get_packet (vm,
1517 &im->discover_neighbor_packet_template,
1520 return clib_error_return (0, "ICMP6 NS packet allocation failed");
1522 hi = vnet_get_sup_hw_interface (vnm, sw_if_index);
1524 /* Destination address is a solicited node multicast address. We need to fill in
1525 the low 24 bits with low 24 bits of target's address. */
1526 h->ip.dst_address.as_u8[13] = dst->as_u8[13];
1527 h->ip.dst_address.as_u8[14] = dst->as_u8[14];
1528 h->ip.dst_address.as_u8[15] = dst->as_u8[15];
1530 h->ip.src_address = src[0];
1531 h->neighbor.target_address = dst[0];
1533 if (PREDICT_FALSE (!hi->hw_address))
1535 return clib_error_return (0, "%U: interface %U do not support ip probe",
1536 format_ip6_address, dst,
1537 format_vnet_sw_if_index_name, vnm,
1541 clib_memcpy_fast (h->link_layer_option.ethernet_address, hi->hw_address,
1542 vec_len (hi->hw_address));
1544 h->neighbor.icmp.checksum =
1545 ip6_tcp_udp_icmp_compute_checksum (vm, 0, &h->ip, &bogus_length);
1546 ASSERT (bogus_length == 0);
1548 b = vlib_get_buffer (vm, bi);
1549 vnet_buffer (b)->sw_if_index[VLIB_RX] =
1550 vnet_buffer (b)->sw_if_index[VLIB_TX] = sw_if_index;
1552 /* Add encapsulation string for software interface (e.g. ethernet header). */
1553 ip46_address_t nh = {
1557 ai = adj_nbr_add_or_lock (FIB_PROTOCOL_IP6,
1558 VNET_LINK_IP6, &nh, sw_if_index);
1561 /* Peer has been previously resolved, retrieve glean adj instead */
1562 if (adj->lookup_next_index == IP_LOOKUP_NEXT_REWRITE && refresh == 0)
1565 ai = adj_glean_add_or_lock (FIB_PROTOCOL_IP6,
1566 VNET_LINK_IP6, sw_if_index, &nh);
1570 vnet_rewrite_one_header (adj[0], h, sizeof (ethernet_header_t));
1571 vlib_buffer_advance (b, -adj->rewrite_header.data_bytes);
1574 vlib_frame_t *f = vlib_get_frame_to_node (vm, hi->output_node_index);
1575 u32 *to_next = vlib_frame_vector_args (f);
1578 vlib_put_frame_to_node (vm, hi->output_node_index, f);
1582 return /* no error */ 0;
1588 IP6_REWRITE_NEXT_DROP,
1589 IP6_REWRITE_NEXT_ICMP_ERROR,
1590 IP6_REWRITE_NEXT_FRAGMENT,
1591 IP6_REWRITE_N_NEXT /* Last */
1592 } ip6_rewrite_next_t;
1595 * This bits of an IPv6 address to mask to construct a multicast
1598 #define IP6_MCAST_ADDR_MASK 0xffffffff
1601 ip6_mtu_check (vlib_buffer_t * b, u16 packet_bytes,
1602 u16 adj_packet_bytes, bool is_locally_generated,
1603 u32 * next, u32 * error)
1605 if (adj_packet_bytes >= 1280 && packet_bytes > adj_packet_bytes)
1607 if (is_locally_generated)
1609 /* IP fragmentation */
1610 ip_frag_set_vnet_buffer (b, adj_packet_bytes,
1611 IP6_FRAG_NEXT_IP6_REWRITE, 0);
1612 *next = IP6_REWRITE_NEXT_FRAGMENT;
1613 *error = IP6_ERROR_MTU_EXCEEDED;
1617 *error = IP6_ERROR_MTU_EXCEEDED;
1618 icmp6_error_set_vnet_buffer (b, ICMP6_packet_too_big, 0,
1620 *next = IP6_REWRITE_NEXT_ICMP_ERROR;
1626 ip6_rewrite_inline_with_gso (vlib_main_t * vm,
1627 vlib_node_runtime_t * node,
1628 vlib_frame_t * frame,
1629 int do_counters, int is_midchain, int is_mcast,
1632 ip_lookup_main_t *lm = &ip6_main.lookup_main;
1633 u32 *from = vlib_frame_vector_args (frame);
1634 u32 n_left_from, n_left_to_next, *to_next, next_index;
1635 vlib_node_runtime_t *error_node =
1636 vlib_node_get_runtime (vm, ip6_input_node.index);
1638 n_left_from = frame->n_vectors;
1639 next_index = node->cached_next_index;
1640 u32 thread_index = vm->thread_index;
1642 while (n_left_from > 0)
1644 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1646 while (n_left_from >= 4 && n_left_to_next >= 2)
1648 ip_adjacency_t *adj0, *adj1;
1649 vlib_buffer_t *p0, *p1;
1650 ip6_header_t *ip0, *ip1;
1651 u32 pi0, rw_len0, next0, error0, adj_index0;
1652 u32 pi1, rw_len1, next1, error1, adj_index1;
1653 u32 tx_sw_if_index0, tx_sw_if_index1;
1654 bool is_locally_originated0, is_locally_originated1;
1656 /* Prefetch next iteration. */
1658 vlib_buffer_t *p2, *p3;
1660 p2 = vlib_get_buffer (vm, from[2]);
1661 p3 = vlib_get_buffer (vm, from[3]);
1663 vlib_prefetch_buffer_header (p2, LOAD);
1664 vlib_prefetch_buffer_header (p3, LOAD);
1666 CLIB_PREFETCH (p2->pre_data, 32, STORE);
1667 CLIB_PREFETCH (p3->pre_data, 32, STORE);
1669 CLIB_PREFETCH (p2->data, sizeof (ip0[0]), STORE);
1670 CLIB_PREFETCH (p3->data, sizeof (ip0[0]), STORE);
1673 pi0 = to_next[0] = from[0];
1674 pi1 = to_next[1] = from[1];
1679 n_left_to_next -= 2;
1681 p0 = vlib_get_buffer (vm, pi0);
1682 p1 = vlib_get_buffer (vm, pi1);
1684 adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
1685 adj_index1 = vnet_buffer (p1)->ip.adj_index[VLIB_TX];
1687 ip0 = vlib_buffer_get_current (p0);
1688 ip1 = vlib_buffer_get_current (p1);
1690 error0 = error1 = IP6_ERROR_NONE;
1691 next0 = next1 = IP6_REWRITE_NEXT_DROP;
1693 is_locally_originated0 =
1694 p0->flags & VNET_BUFFER_F_LOCALLY_ORIGINATED;
1695 if (PREDICT_TRUE (!is_locally_originated0))
1697 i32 hop_limit0 = ip0->hop_limit;
1699 /* Input node should have reject packets with hop limit 0. */
1700 ASSERT (ip0->hop_limit > 0);
1704 ip0->hop_limit = hop_limit0;
1707 * If the hop count drops below 1 when forwarding, generate
1710 if (PREDICT_FALSE (hop_limit0 <= 0))
1712 error0 = IP6_ERROR_TIME_EXPIRED;
1713 next0 = IP6_REWRITE_NEXT_ICMP_ERROR;
1714 vnet_buffer (p0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
1715 icmp6_error_set_vnet_buffer (p0, ICMP6_time_exceeded,
1716 ICMP6_time_exceeded_ttl_exceeded_in_transit,
1722 p0->flags &= ~VNET_BUFFER_F_LOCALLY_ORIGINATED;
1724 is_locally_originated1 =
1725 p1->flags & VNET_BUFFER_F_LOCALLY_ORIGINATED;
1726 if (PREDICT_TRUE (!is_locally_originated1))
1728 i32 hop_limit1 = ip1->hop_limit;
1730 /* Input node should have reject packets with hop limit 0. */
1731 ASSERT (ip1->hop_limit > 0);
1735 ip1->hop_limit = hop_limit1;
1738 * If the hop count drops below 1 when forwarding, generate
1741 if (PREDICT_FALSE (hop_limit1 <= 0))
1743 error1 = IP6_ERROR_TIME_EXPIRED;
1744 next1 = IP6_REWRITE_NEXT_ICMP_ERROR;
1745 vnet_buffer (p1)->sw_if_index[VLIB_TX] = (u32) ~ 0;
1746 icmp6_error_set_vnet_buffer (p1, ICMP6_time_exceeded,
1747 ICMP6_time_exceeded_ttl_exceeded_in_transit,
1753 p1->flags &= ~VNET_BUFFER_F_LOCALLY_ORIGINATED;
1755 adj0 = adj_get (adj_index0);
1756 adj1 = adj_get (adj_index1);
1758 rw_len0 = adj0[0].rewrite_header.data_bytes;
1759 rw_len1 = adj1[0].rewrite_header.data_bytes;
1760 vnet_buffer (p0)->ip.save_rewrite_length = rw_len0;
1761 vnet_buffer (p1)->ip.save_rewrite_length = rw_len1;
1765 vlib_increment_combined_counter
1766 (&adjacency_counters,
1767 thread_index, adj_index0, 1,
1768 vlib_buffer_length_in_chain (vm, p0) + rw_len0);
1769 vlib_increment_combined_counter
1770 (&adjacency_counters,
1771 thread_index, adj_index1, 1,
1772 vlib_buffer_length_in_chain (vm, p1) + rw_len1);
1775 /* Check MTU of outgoing interface. */
1777 clib_net_to_host_u16 (ip0->payload_length) +
1778 sizeof (ip6_header_t);
1780 clib_net_to_host_u16 (ip1->payload_length) +
1781 sizeof (ip6_header_t);
1782 if (do_gso && (p0->flags & VNET_BUFFER_F_GSO))
1783 ip0_len = gso_mtu_sz (p0);
1784 if (do_gso && (p1->flags & VNET_BUFFER_F_GSO))
1785 ip1_len = gso_mtu_sz (p1);
1789 ip6_mtu_check (p0, ip0_len,
1790 adj0[0].rewrite_header.max_l3_packet_bytes,
1791 is_locally_originated0, &next0, &error0);
1792 ip6_mtu_check (p1, ip1_len,
1793 adj1[0].rewrite_header.max_l3_packet_bytes,
1794 is_locally_originated1, &next1, &error1);
1796 /* Don't adjust the buffer for hop count issue; icmp-error node
1797 * wants to see the IP header */
1798 if (PREDICT_TRUE (error0 == IP6_ERROR_NONE))
1800 p0->current_data -= rw_len0;
1801 p0->current_length += rw_len0;
1803 tx_sw_if_index0 = adj0[0].rewrite_header.sw_if_index;
1804 vnet_buffer (p0)->sw_if_index[VLIB_TX] = tx_sw_if_index0;
1805 next0 = adj0[0].rewrite_header.next_index;
1808 (adj0[0].rewrite_header.flags & VNET_REWRITE_HAS_FEATURES))
1809 vnet_feature_arc_start (lm->output_feature_arc_index,
1810 tx_sw_if_index0, &next0, p0);
1814 p0->error = error_node->errors[error0];
1816 if (PREDICT_TRUE (error1 == IP6_ERROR_NONE))
1818 p1->current_data -= rw_len1;
1819 p1->current_length += rw_len1;
1821 tx_sw_if_index1 = adj1[0].rewrite_header.sw_if_index;
1822 vnet_buffer (p1)->sw_if_index[VLIB_TX] = tx_sw_if_index1;
1823 next1 = adj1[0].rewrite_header.next_index;
1826 (adj1[0].rewrite_header.flags & VNET_REWRITE_HAS_FEATURES))
1827 vnet_feature_arc_start (lm->output_feature_arc_index,
1828 tx_sw_if_index1, &next1, p1);
1832 p1->error = error_node->errors[error1];
1837 /* before we paint on the next header, update the L4
1838 * checksums if required, since there's no offload on a tunnel */
1839 calc_checksums (vm, p0);
1840 calc_checksums (vm, p1);
1843 /* Guess we are only writing on simple Ethernet header. */
1844 vnet_rewrite_two_headers (adj0[0], adj1[0],
1845 ip0, ip1, sizeof (ethernet_header_t));
1849 if (adj0->sub_type.midchain.fixup_func)
1850 adj0->sub_type.midchain.fixup_func
1851 (vm, adj0, p0, adj0->sub_type.midchain.fixup_data);
1852 if (adj1->sub_type.midchain.fixup_func)
1853 adj1->sub_type.midchain.fixup_func
1854 (vm, adj1, p1, adj1->sub_type.midchain.fixup_data);
1859 * copy bytes from the IP address into the MAC rewrite
1861 vnet_ip_mcast_fixup_header (IP6_MCAST_ADDR_MASK,
1863 rewrite_header.dst_mcast_offset,
1864 &ip0->dst_address.as_u32[3],
1866 vnet_ip_mcast_fixup_header (IP6_MCAST_ADDR_MASK,
1868 rewrite_header.dst_mcast_offset,
1869 &ip1->dst_address.as_u32[3],
1873 vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
1874 to_next, n_left_to_next,
1875 pi0, pi1, next0, next1);
1878 while (n_left_from > 0 && n_left_to_next > 0)
1880 ip_adjacency_t *adj0;
1884 u32 adj_index0, next0, error0;
1885 u32 tx_sw_if_index0;
1886 bool is_locally_originated0;
1888 pi0 = to_next[0] = from[0];
1890 p0 = vlib_get_buffer (vm, pi0);
1892 adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
1894 adj0 = adj_get (adj_index0);
1896 ip0 = vlib_buffer_get_current (p0);
1898 error0 = IP6_ERROR_NONE;
1899 next0 = IP6_REWRITE_NEXT_DROP;
1901 /* Check hop limit */
1902 is_locally_originated0 =
1903 p0->flags & VNET_BUFFER_F_LOCALLY_ORIGINATED;
1904 if (PREDICT_TRUE (!is_locally_originated0))
1906 i32 hop_limit0 = ip0->hop_limit;
1908 ASSERT (ip0->hop_limit > 0);
1912 ip0->hop_limit = hop_limit0;
1914 if (PREDICT_FALSE (hop_limit0 <= 0))
1917 * If the hop count drops below 1 when forwarding, generate
1920 error0 = IP6_ERROR_TIME_EXPIRED;
1921 next0 = IP6_REWRITE_NEXT_ICMP_ERROR;
1922 vnet_buffer (p0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
1923 icmp6_error_set_vnet_buffer (p0, ICMP6_time_exceeded,
1924 ICMP6_time_exceeded_ttl_exceeded_in_transit,
1930 p0->flags &= ~VNET_BUFFER_F_LOCALLY_ORIGINATED;
1935 calc_checksums (vm, p0);
1938 /* Guess we are only writing on simple Ethernet header. */
1939 vnet_rewrite_one_header (adj0[0], ip0, sizeof (ethernet_header_t));
1941 /* Update packet buffer attributes/set output interface. */
1942 rw_len0 = adj0[0].rewrite_header.data_bytes;
1943 vnet_buffer (p0)->ip.save_rewrite_length = rw_len0;
1947 vlib_increment_combined_counter
1948 (&adjacency_counters,
1949 thread_index, adj_index0, 1,
1950 vlib_buffer_length_in_chain (vm, p0) + rw_len0);
1953 /* Check MTU of outgoing interface. */
1955 clib_net_to_host_u16 (ip0->payload_length) +
1956 sizeof (ip6_header_t);
1957 if (do_gso && (p0->flags & VNET_BUFFER_F_GSO))
1958 ip0_len = gso_mtu_sz (p0);
1960 ip6_mtu_check (p0, ip0_len,
1961 adj0[0].rewrite_header.max_l3_packet_bytes,
1962 is_locally_originated0, &next0, &error0);
1964 /* Don't adjust the buffer for hop count issue; icmp-error node
1965 * wants to see the IP header */
1966 if (PREDICT_TRUE (error0 == IP6_ERROR_NONE))
1968 p0->current_data -= rw_len0;
1969 p0->current_length += rw_len0;
1971 tx_sw_if_index0 = adj0[0].rewrite_header.sw_if_index;
1973 vnet_buffer (p0)->sw_if_index[VLIB_TX] = tx_sw_if_index0;
1974 next0 = adj0[0].rewrite_header.next_index;
1977 (adj0[0].rewrite_header.flags & VNET_REWRITE_HAS_FEATURES))
1978 vnet_feature_arc_start (lm->output_feature_arc_index,
1979 tx_sw_if_index0, &next0, p0);
1983 p0->error = error_node->errors[error0];
1988 if (adj0->sub_type.midchain.fixup_func)
1989 adj0->sub_type.midchain.fixup_func
1990 (vm, adj0, p0, adj0->sub_type.midchain.fixup_data);
1994 vnet_ip_mcast_fixup_header (IP6_MCAST_ADDR_MASK,
1996 rewrite_header.dst_mcast_offset,
1997 &ip0->dst_address.as_u32[3],
2004 n_left_to_next -= 1;
2006 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
2007 to_next, n_left_to_next,
2011 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2014 /* Need to do trace after rewrites to pick up new packet data. */
2015 if (node->flags & VLIB_NODE_FLAG_TRACE)
2016 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
2018 return frame->n_vectors;
2022 ip6_rewrite_inline (vlib_main_t * vm,
2023 vlib_node_runtime_t * node,
2024 vlib_frame_t * frame,
2025 int do_counters, int is_midchain, int is_mcast)
2027 vnet_main_t *vnm = vnet_get_main ();
2028 if (PREDICT_FALSE (vnm->interface_main.gso_interface_count > 0))
2029 return ip6_rewrite_inline_with_gso (vm, node, frame, do_counters,
2030 is_midchain, is_mcast,
2033 return ip6_rewrite_inline_with_gso (vm, node, frame, do_counters,
2034 is_midchain, is_mcast,
2035 0 /* no do_gso */ );
2038 VLIB_NODE_FN (ip6_rewrite_node) (vlib_main_t * vm,
2039 vlib_node_runtime_t * node,
2040 vlib_frame_t * frame)
2042 if (adj_are_counters_enabled ())
2043 return ip6_rewrite_inline (vm, node, frame, 1, 0, 0);
2045 return ip6_rewrite_inline (vm, node, frame, 0, 0, 0);
2048 VLIB_NODE_FN (ip6_rewrite_bcast_node) (vlib_main_t * vm,
2049 vlib_node_runtime_t * node,
2050 vlib_frame_t * frame)
2052 if (adj_are_counters_enabled ())
2053 return ip6_rewrite_inline (vm, node, frame, 1, 0, 0);
2055 return ip6_rewrite_inline (vm, node, frame, 0, 0, 0);
2058 VLIB_NODE_FN (ip6_rewrite_mcast_node) (vlib_main_t * vm,
2059 vlib_node_runtime_t * node,
2060 vlib_frame_t * frame)
2062 if (adj_are_counters_enabled ())
2063 return ip6_rewrite_inline (vm, node, frame, 1, 0, 1);
2065 return ip6_rewrite_inline (vm, node, frame, 0, 0, 1);
2068 VLIB_NODE_FN (ip6_midchain_node) (vlib_main_t * vm,
2069 vlib_node_runtime_t * node,
2070 vlib_frame_t * frame)
2072 if (adj_are_counters_enabled ())
2073 return ip6_rewrite_inline (vm, node, frame, 1, 1, 0);
2075 return ip6_rewrite_inline (vm, node, frame, 0, 1, 0);
2078 VLIB_NODE_FN (ip6_mcast_midchain_node) (vlib_main_t * vm,
2079 vlib_node_runtime_t * node,
2080 vlib_frame_t * frame)
2082 if (adj_are_counters_enabled ())
2083 return ip6_rewrite_inline (vm, node, frame, 1, 1, 1);
2085 return ip6_rewrite_inline (vm, node, frame, 0, 1, 1);
2089 VLIB_REGISTER_NODE (ip6_midchain_node) =
2091 .name = "ip6-midchain",
2092 .vector_size = sizeof (u32),
2093 .format_trace = format_ip6_forward_next_trace,
2094 .sibling_of = "ip6-rewrite",
2097 VLIB_REGISTER_NODE (ip6_rewrite_node) =
2099 .name = "ip6-rewrite",
2100 .vector_size = sizeof (u32),
2101 .format_trace = format_ip6_rewrite_trace,
2102 .n_next_nodes = IP6_REWRITE_N_NEXT,
2105 [IP6_REWRITE_NEXT_DROP] = "ip6-drop",
2106 [IP6_REWRITE_NEXT_ICMP_ERROR] = "ip6-icmp-error",
2107 [IP6_REWRITE_NEXT_FRAGMENT] = "ip6-frag",
2111 VLIB_REGISTER_NODE (ip6_rewrite_bcast_node) = {
2112 .name = "ip6-rewrite-bcast",
2113 .vector_size = sizeof (u32),
2115 .format_trace = format_ip6_rewrite_trace,
2116 .sibling_of = "ip6-rewrite",
2119 VLIB_REGISTER_NODE (ip6_rewrite_mcast_node) =
2121 .name = "ip6-rewrite-mcast",
2122 .vector_size = sizeof (u32),
2123 .format_trace = format_ip6_rewrite_trace,
2124 .sibling_of = "ip6-rewrite",
2128 VLIB_REGISTER_NODE (ip6_mcast_midchain_node) =
2130 .name = "ip6-mcast-midchain",
2131 .vector_size = sizeof (u32),
2132 .format_trace = format_ip6_rewrite_trace,
2133 .sibling_of = "ip6-rewrite",
2139 * Hop-by-Hop handling
2141 #ifndef CLIB_MARCH_VARIANT
2142 ip6_hop_by_hop_main_t ip6_hop_by_hop_main;
2143 #endif /* CLIB_MARCH_VARIANT */
2145 #define foreach_ip6_hop_by_hop_error \
2146 _(PROCESSED, "pkts with ip6 hop-by-hop options") \
2147 _(FORMAT, "incorrectly formatted hop-by-hop options") \
2148 _(UNKNOWN_OPTION, "unknown ip6 hop-by-hop options")
2153 #define _(sym,str) IP6_HOP_BY_HOP_ERROR_##sym,
2154 foreach_ip6_hop_by_hop_error
2156 IP6_HOP_BY_HOP_N_ERROR,
2157 } ip6_hop_by_hop_error_t;
2161 * Primary h-b-h handler trace support
2162 * We work pretty hard on the problem for obvious reasons
2168 u8 option_data[256];
2169 } ip6_hop_by_hop_trace_t;
2171 extern vlib_node_registration_t ip6_hop_by_hop_node;
2173 static char *ip6_hop_by_hop_error_strings[] = {
2174 #define _(sym,string) string,
2175 foreach_ip6_hop_by_hop_error
2179 #ifndef CLIB_MARCH_VARIANT
2181 format_ip6_hop_by_hop_ext_hdr (u8 * s, va_list * args)
2183 ip6_hop_by_hop_header_t *hbh0 = va_arg (*args, ip6_hop_by_hop_header_t *);
2184 int total_len = va_arg (*args, int);
2185 ip6_hop_by_hop_option_t *opt0, *limit0;
2186 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2189 s = format (s, "IP6_HOP_BY_HOP: next protocol %d len %d total %d",
2190 hbh0->protocol, (hbh0->length + 1) << 3, total_len);
2192 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2193 limit0 = (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 + total_len);
2195 while (opt0 < limit0)
2200 case 0: /* Pad, just stop */
2201 opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0 + 1);
2205 if (hm->trace[type0])
2207 s = (*hm->trace[type0]) (s, opt0);
2212 format (s, "\n unrecognized option %d length %d", type0,
2216 (ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length +
2217 sizeof (ip6_hop_by_hop_option_t));
2226 format_ip6_hop_by_hop_trace (u8 * s, va_list * args)
2228 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
2229 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
2230 ip6_hop_by_hop_trace_t *t = va_arg (*args, ip6_hop_by_hop_trace_t *);
2231 ip6_hop_by_hop_header_t *hbh0;
2232 ip6_hop_by_hop_option_t *opt0, *limit0;
2233 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2237 hbh0 = (ip6_hop_by_hop_header_t *) t->option_data;
2239 s = format (s, "IP6_HOP_BY_HOP: next index %d len %d traced %d",
2240 t->next_index, (hbh0->length + 1) << 3, t->trace_len);
2242 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2243 limit0 = (ip6_hop_by_hop_option_t *) ((u8 *) hbh0) + t->trace_len;
2245 while (opt0 < limit0)
2250 case 0: /* Pad, just stop */
2251 opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0) + 1;
2255 if (hm->trace[type0])
2257 s = (*hm->trace[type0]) (s, opt0);
2262 format (s, "\n unrecognized option %d length %d", type0,
2266 (ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length +
2267 sizeof (ip6_hop_by_hop_option_t));
2275 ip6_scan_hbh_options (vlib_buffer_t * b0,
2277 ip6_hop_by_hop_header_t * hbh0,
2278 ip6_hop_by_hop_option_t * opt0,
2279 ip6_hop_by_hop_option_t * limit0, u32 * next0)
2281 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2285 while (opt0 < limit0)
2291 opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0) + 1;
2296 if (hm->options[type0])
2298 if ((*hm->options[type0]) (b0, ip0, opt0) < 0)
2300 error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2306 /* Unrecognized mandatory option, check the two high order bits */
2307 switch (opt0->type & HBH_OPTION_TYPE_HIGH_ORDER_BITS)
2309 case HBH_OPTION_TYPE_SKIP_UNKNOWN:
2311 case HBH_OPTION_TYPE_DISCARD_UNKNOWN:
2312 error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2313 *next0 = IP_LOOKUP_NEXT_DROP;
2315 case HBH_OPTION_TYPE_DISCARD_UNKNOWN_ICMP:
2316 error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2317 *next0 = IP_LOOKUP_NEXT_ICMP_ERROR;
2318 icmp6_error_set_vnet_buffer (b0, ICMP6_parameter_problem,
2319 ICMP6_parameter_problem_unrecognized_option,
2320 (u8 *) opt0 - (u8 *) ip0);
2322 case HBH_OPTION_TYPE_DISCARD_UNKNOWN_ICMP_NOT_MCAST:
2323 error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2324 if (!ip6_address_is_multicast (&ip0->dst_address))
2326 *next0 = IP_LOOKUP_NEXT_ICMP_ERROR;
2327 icmp6_error_set_vnet_buffer (b0,
2328 ICMP6_parameter_problem,
2329 ICMP6_parameter_problem_unrecognized_option,
2330 (u8 *) opt0 - (u8 *) ip0);
2334 *next0 = IP_LOOKUP_NEXT_DROP;
2342 (ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length +
2343 sizeof (ip6_hop_by_hop_option_t));
2349 * Process the Hop-by-Hop Options header
2351 VLIB_NODE_FN (ip6_hop_by_hop_node) (vlib_main_t * vm,
2352 vlib_node_runtime_t * node,
2353 vlib_frame_t * frame)
2355 vlib_node_runtime_t *error_node =
2356 vlib_node_get_runtime (vm, ip6_hop_by_hop_node.index);
2357 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2358 u32 n_left_from, *from, *to_next;
2359 ip_lookup_next_t next_index;
2361 from = vlib_frame_vector_args (frame);
2362 n_left_from = frame->n_vectors;
2363 next_index = node->cached_next_index;
2365 while (n_left_from > 0)
2369 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
2371 while (n_left_from >= 4 && n_left_to_next >= 2)
2374 vlib_buffer_t *b0, *b1;
2376 ip6_header_t *ip0, *ip1;
2377 ip6_hop_by_hop_header_t *hbh0, *hbh1;
2378 ip6_hop_by_hop_option_t *opt0, *limit0, *opt1, *limit1;
2379 u8 error0 = 0, error1 = 0;
2381 /* Prefetch next iteration. */
2383 vlib_buffer_t *p2, *p3;
2385 p2 = vlib_get_buffer (vm, from[2]);
2386 p3 = vlib_get_buffer (vm, from[3]);
2388 vlib_prefetch_buffer_header (p2, LOAD);
2389 vlib_prefetch_buffer_header (p3, LOAD);
2391 CLIB_PREFETCH (p2->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
2392 CLIB_PREFETCH (p3->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
2395 /* Speculatively enqueue b0, b1 to the current next frame */
2396 to_next[0] = bi0 = from[0];
2397 to_next[1] = bi1 = from[1];
2401 n_left_to_next -= 2;
2403 b0 = vlib_get_buffer (vm, bi0);
2404 b1 = vlib_get_buffer (vm, bi1);
2406 /* Default use the next_index from the adjacency. A HBH option rarely redirects to a different node */
2407 u32 adj_index0 = vnet_buffer (b0)->ip.adj_index[VLIB_TX];
2408 ip_adjacency_t *adj0 = adj_get (adj_index0);
2409 u32 adj_index1 = vnet_buffer (b1)->ip.adj_index[VLIB_TX];
2410 ip_adjacency_t *adj1 = adj_get (adj_index1);
2412 /* Default use the next_index from the adjacency. A HBH option rarely redirects to a different node */
2413 next0 = adj0->lookup_next_index;
2414 next1 = adj1->lookup_next_index;
2416 ip0 = vlib_buffer_get_current (b0);
2417 ip1 = vlib_buffer_get_current (b1);
2418 hbh0 = (ip6_hop_by_hop_header_t *) (ip0 + 1);
2419 hbh1 = (ip6_hop_by_hop_header_t *) (ip1 + 1);
2420 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2421 opt1 = (ip6_hop_by_hop_option_t *) (hbh1 + 1);
2423 (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 +
2424 ((hbh0->length + 1) << 3));
2426 (ip6_hop_by_hop_option_t *) ((u8 *) hbh1 +
2427 ((hbh1->length + 1) << 3));
2430 * Basic validity checks
2432 if ((hbh0->length + 1) << 3 >
2433 clib_net_to_host_u16 (ip0->payload_length))
2435 error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2436 next0 = IP_LOOKUP_NEXT_DROP;
2439 /* Scan the set of h-b-h options, process ones that we understand */
2440 error0 = ip6_scan_hbh_options (b0, ip0, hbh0, opt0, limit0, &next0);
2442 if ((hbh1->length + 1) << 3 >
2443 clib_net_to_host_u16 (ip1->payload_length))
2445 error1 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2446 next1 = IP_LOOKUP_NEXT_DROP;
2449 /* Scan the set of h-b-h options, process ones that we understand */
2450 error1 = ip6_scan_hbh_options (b1, ip1, hbh1, opt1, limit1, &next1);
2453 /* Has the classifier flagged this buffer for special treatment? */
2456 && (vnet_buffer (b0)->l2_classify.opaque_index & OI_DECAP)))
2457 next0 = hm->next_override;
2459 /* Has the classifier flagged this buffer for special treatment? */
2462 && (vnet_buffer (b1)->l2_classify.opaque_index & OI_DECAP)))
2463 next1 = hm->next_override;
2465 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)))
2467 if (b0->flags & VLIB_BUFFER_IS_TRACED)
2469 ip6_hop_by_hop_trace_t *t =
2470 vlib_add_trace (vm, node, b0, sizeof (*t));
2471 u32 trace_len = (hbh0->length + 1) << 3;
2472 t->next_index = next0;
2473 /* Capture the h-b-h option verbatim */
2476 ARRAY_LEN (t->option_data) ? trace_len :
2477 ARRAY_LEN (t->option_data);
2478 t->trace_len = trace_len;
2479 clib_memcpy_fast (t->option_data, hbh0, trace_len);
2481 if (b1->flags & VLIB_BUFFER_IS_TRACED)
2483 ip6_hop_by_hop_trace_t *t =
2484 vlib_add_trace (vm, node, b1, sizeof (*t));
2485 u32 trace_len = (hbh1->length + 1) << 3;
2486 t->next_index = next1;
2487 /* Capture the h-b-h option verbatim */
2490 ARRAY_LEN (t->option_data) ? trace_len :
2491 ARRAY_LEN (t->option_data);
2492 t->trace_len = trace_len;
2493 clib_memcpy_fast (t->option_data, hbh1, trace_len);
2498 b0->error = error_node->errors[error0];
2499 b1->error = error_node->errors[error1];
2501 /* verify speculative enqueue, maybe switch current next frame */
2502 vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
2503 n_left_to_next, bi0, bi1, next0,
2507 while (n_left_from > 0 && n_left_to_next > 0)
2513 ip6_hop_by_hop_header_t *hbh0;
2514 ip6_hop_by_hop_option_t *opt0, *limit0;
2517 /* Speculatively enqueue b0 to the current next frame */
2523 n_left_to_next -= 1;
2525 b0 = vlib_get_buffer (vm, bi0);
2527 * Default use the next_index from the adjacency.
2528 * A HBH option rarely redirects to a different node
2530 u32 adj_index0 = vnet_buffer (b0)->ip.adj_index[VLIB_TX];
2531 ip_adjacency_t *adj0 = adj_get (adj_index0);
2532 next0 = adj0->lookup_next_index;
2534 ip0 = vlib_buffer_get_current (b0);
2535 hbh0 = (ip6_hop_by_hop_header_t *) (ip0 + 1);
2536 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2538 (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 +
2539 ((hbh0->length + 1) << 3));
2542 * Basic validity checks
2544 if ((hbh0->length + 1) << 3 >
2545 clib_net_to_host_u16 (ip0->payload_length))
2547 error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2548 next0 = IP_LOOKUP_NEXT_DROP;
2552 /* Scan the set of h-b-h options, process ones that we understand */
2553 error0 = ip6_scan_hbh_options (b0, ip0, hbh0, opt0, limit0, &next0);
2556 /* Has the classifier flagged this buffer for special treatment? */
2559 && (vnet_buffer (b0)->l2_classify.opaque_index & OI_DECAP)))
2560 next0 = hm->next_override;
2562 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
2564 ip6_hop_by_hop_trace_t *t =
2565 vlib_add_trace (vm, node, b0, sizeof (*t));
2566 u32 trace_len = (hbh0->length + 1) << 3;
2567 t->next_index = next0;
2568 /* Capture the h-b-h option verbatim */
2571 ARRAY_LEN (t->option_data) ? trace_len :
2572 ARRAY_LEN (t->option_data);
2573 t->trace_len = trace_len;
2574 clib_memcpy_fast (t->option_data, hbh0, trace_len);
2577 b0->error = error_node->errors[error0];
2579 /* verify speculative enqueue, maybe switch current next frame */
2580 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
2581 n_left_to_next, bi0, next0);
2583 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2585 return frame->n_vectors;
2589 VLIB_REGISTER_NODE (ip6_hop_by_hop_node) =
2591 .name = "ip6-hop-by-hop",
2592 .sibling_of = "ip6-lookup",
2593 .vector_size = sizeof (u32),
2594 .format_trace = format_ip6_hop_by_hop_trace,
2595 .type = VLIB_NODE_TYPE_INTERNAL,
2596 .n_errors = ARRAY_LEN (ip6_hop_by_hop_error_strings),
2597 .error_strings = ip6_hop_by_hop_error_strings,
2602 static clib_error_t *
2603 ip6_hop_by_hop_init (vlib_main_t * vm)
2605 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2606 clib_memset (hm->options, 0, sizeof (hm->options));
2607 clib_memset (hm->trace, 0, sizeof (hm->trace));
2608 hm->next_override = IP6_LOOKUP_NEXT_POP_HOP_BY_HOP;
2612 VLIB_INIT_FUNCTION (ip6_hop_by_hop_init);
2614 #ifndef CLIB_MARCH_VARIANT
2616 ip6_hbh_set_next_override (uword next)
2618 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2620 hm->next_override = next;
2624 ip6_hbh_register_option (u8 option,
2625 int options (vlib_buffer_t * b, ip6_header_t * ip,
2626 ip6_hop_by_hop_option_t * opt),
2627 u8 * trace (u8 * s, ip6_hop_by_hop_option_t * opt))
2629 ip6_main_t *im = &ip6_main;
2630 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2632 ASSERT ((u32) option < ARRAY_LEN (hm->options));
2634 /* Already registered */
2635 if (hm->options[option])
2638 hm->options[option] = options;
2639 hm->trace[option] = trace;
2641 /* Set global variable */
2642 im->hbh_enabled = 1;
2648 ip6_hbh_unregister_option (u8 option)
2650 ip6_main_t *im = &ip6_main;
2651 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2653 ASSERT ((u32) option < ARRAY_LEN (hm->options));
2655 /* Not registered */
2656 if (!hm->options[option])
2659 hm->options[option] = NULL;
2660 hm->trace[option] = NULL;
2662 /* Disable global knob if this was the last option configured */
2665 for (i = 0; i < 256; i++)
2667 if (hm->options[option])
2674 im->hbh_enabled = 0;
2679 /* Global IP6 main. */
2680 ip6_main_t ip6_main;
2683 static clib_error_t *
2684 ip6_lookup_init (vlib_main_t * vm)
2686 ip6_main_t *im = &ip6_main;
2687 clib_error_t *error;
2690 if ((error = vlib_call_init_function (vm, vnet_feature_init)))
2693 for (i = 0; i < ARRAY_LEN (im->fib_masks); i++)
2700 for (j = 0; j < i0; j++)
2701 im->fib_masks[i].as_u32[j] = ~0;
2704 im->fib_masks[i].as_u32[i0] =
2705 clib_host_to_net_u32 (pow2_mask (i1) << (32 - i1));
2708 ip_lookup_init (&im->lookup_main, /* is_ip6 */ 1);
2710 if (im->lookup_table_nbuckets == 0)
2711 im->lookup_table_nbuckets = IP6_FIB_DEFAULT_HASH_NUM_BUCKETS;
2713 im->lookup_table_nbuckets = 1 << max_log2 (im->lookup_table_nbuckets);
2715 if (im->lookup_table_size == 0)
2716 im->lookup_table_size = IP6_FIB_DEFAULT_HASH_MEMORY_SIZE;
2718 clib_bihash_init_24_8 (&(im->ip6_table[IP6_FIB_TABLE_FWDING].ip6_hash),
2719 "ip6 FIB fwding table",
2720 im->lookup_table_nbuckets, im->lookup_table_size);
2721 clib_bihash_init_24_8 (&im->ip6_table[IP6_FIB_TABLE_NON_FWDING].ip6_hash,
2722 "ip6 FIB non-fwding table",
2723 im->lookup_table_nbuckets, im->lookup_table_size);
2724 clib_bihash_init_40_8 (&im->ip6_mtable.ip6_mhash,
2726 im->lookup_table_nbuckets, im->lookup_table_size);
2728 /* Create FIB with index 0 and table id of 0. */
2729 fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6, 0,
2730 FIB_SOURCE_DEFAULT_ROUTE);
2731 mfib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6, 0,
2732 MFIB_SOURCE_DEFAULT_ROUTE);
2736 pn = pg_get_node (ip6_lookup_node.index);
2737 pn->unformat_edit = unformat_pg_ip6_header;
2740 /* Unless explicitly configured, don't process HBH options */
2741 im->hbh_enabled = 0;
2744 icmp6_neighbor_solicitation_header_t p;
2746 clib_memset (&p, 0, sizeof (p));
2748 p.ip.ip_version_traffic_class_and_flow_label =
2749 clib_host_to_net_u32 (0x6 << 28);
2750 p.ip.payload_length =
2751 clib_host_to_net_u16 (sizeof (p) -
2753 (icmp6_neighbor_solicitation_header_t, neighbor));
2754 p.ip.protocol = IP_PROTOCOL_ICMP6;
2755 p.ip.hop_limit = 255;
2756 ip6_set_solicited_node_multicast_address (&p.ip.dst_address, 0);
2758 p.neighbor.icmp.type = ICMP6_neighbor_solicitation;
2760 p.link_layer_option.header.type =
2761 ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address;
2762 p.link_layer_option.header.n_data_u64s =
2763 sizeof (p.link_layer_option) / sizeof (u64);
2765 vlib_packet_template_init (vm,
2766 &im->discover_neighbor_packet_template,
2768 /* alloc chunk size */ 8,
2769 "ip6 neighbor discovery");
2775 VLIB_INIT_FUNCTION (ip6_lookup_init);
2777 static clib_error_t *
2778 test_ip6_link_command_fn (vlib_main_t * vm,
2779 unformat_input_t * input, vlib_cli_command_t * cmd)
2782 ip6_address_t _a, *a = &_a;
2784 if (unformat (input, "%U", unformat_ethernet_address, mac))
2786 ip6_link_local_address_from_ethernet_mac_address (a, mac);
2787 vlib_cli_output (vm, "Link local address: %U", format_ip6_address, a);
2788 ip6_ethernet_mac_address_from_link_local_address (mac, a);
2789 vlib_cli_output (vm, "Original MAC address: %U",
2790 format_ethernet_address, mac);
2797 * This command converts the given MAC Address into an IPv6 link-local
2801 * Example of how to create an IPv6 link-local address:
2802 * @cliexstart{test ip6 link 16:d9:e0:91:79:86}
2803 * Link local address: fe80::14d9:e0ff:fe91:7986
2804 * Original MAC address: 16:d9:e0:91:79:86
2808 VLIB_CLI_COMMAND (test_link_command, static) =
2810 .path = "test ip6 link",
2811 .function = test_ip6_link_command_fn,
2812 .short_help = "test ip6 link <mac-address>",
2816 #ifndef CLIB_MARCH_VARIANT
2818 vnet_set_ip6_flow_hash (u32 table_id, u32 flow_hash_config)
2822 fib_index = fib_table_find (FIB_PROTOCOL_IP6, table_id);
2824 if (~0 == fib_index)
2825 return VNET_API_ERROR_NO_SUCH_FIB;
2827 fib_table_set_flow_hash_config (fib_index, FIB_PROTOCOL_IP6,
2834 static clib_error_t *
2835 set_ip6_flow_hash_command_fn (vlib_main_t * vm,
2836 unformat_input_t * input,
2837 vlib_cli_command_t * cmd)
2841 u32 flow_hash_config = 0;
2844 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
2846 if (unformat (input, "table %d", &table_id))
2849 else if (unformat (input, #a)) { flow_hash_config |= v; matched=1;}
2850 foreach_flow_hash_bit
2857 return clib_error_return (0, "unknown input `%U'",
2858 format_unformat_error, input);
2860 rv = vnet_set_ip6_flow_hash (table_id, flow_hash_config);
2867 return clib_error_return (0, "no such FIB table %d", table_id);
2870 clib_warning ("BUG: illegal flow hash config 0x%x", flow_hash_config);
2878 * Configure the set of IPv6 fields used by the flow hash.
2882 * Example of how to set the flow hash on a given table:
2883 * @cliexcmd{set ip6 flow-hash table 8 dst sport dport proto}
2885 * Example of display the configured flow hash:
2886 * @cliexstart{show ip6 fib}
2887 * ipv6-VRF:0, fib_index 0, flow hash: src dst sport dport proto
2890 * [@0]: dpo-load-balance: [index:5 buckets:1 uRPF:5 to:[0:0]]
2891 * [0] [@0]: dpo-drop ip6
2894 * [@0]: dpo-load-balance: [index:10 buckets:1 uRPF:10 to:[0:0]]
2895 * [0] [@2]: dpo-receive
2898 * [@0]: dpo-load-balance: [index:8 buckets:1 uRPF:8 to:[0:0]]
2899 * [0] [@2]: dpo-receive
2902 * [@0]: dpo-load-balance: [index:7 buckets:1 uRPF:7 to:[0:0]]
2903 * [0] [@2]: dpo-receive
2906 * [@0]: dpo-load-balance: [index:9 buckets:1 uRPF:9 to:[0:0]]
2907 * [0] [@2]: dpo-receive
2908 * ff02::1:ff00:0/104
2910 * [@0]: dpo-load-balance: [index:6 buckets:1 uRPF:6 to:[0:0]]
2911 * [0] [@2]: dpo-receive
2912 * ipv6-VRF:8, fib_index 1, flow hash: dst sport dport proto
2915 * [@0]: dpo-load-balance: [index:21 buckets:1 uRPF:20 to:[0:0]]
2916 * [0] [@0]: dpo-drop ip6
2919 * [@0]: dpo-load-balance: [index:27 buckets:1 uRPF:26 to:[0:0]]
2920 * [0] [@4]: ipv6-glean: af_packet0
2923 * [@0]: dpo-load-balance: [index:28 buckets:1 uRPF:27 to:[0:0]]
2924 * [0] [@2]: dpo-receive: @::a:1:1:0:7 on af_packet0
2927 * [@0]: dpo-load-balance: [index:26 buckets:1 uRPF:25 to:[0:0]]
2928 * [0] [@2]: dpo-receive
2929 * fe80::fe:3eff:fe3e:9222/128
2931 * [@0]: dpo-load-balance: [index:29 buckets:1 uRPF:28 to:[0:0]]
2932 * [0] [@2]: dpo-receive: fe80::fe:3eff:fe3e:9222 on af_packet0
2935 * [@0]: dpo-load-balance: [index:24 buckets:1 uRPF:23 to:[0:0]]
2936 * [0] [@2]: dpo-receive
2939 * [@0]: dpo-load-balance: [index:23 buckets:1 uRPF:22 to:[0:0]]
2940 * [0] [@2]: dpo-receive
2943 * [@0]: dpo-load-balance: [index:25 buckets:1 uRPF:24 to:[0:0]]
2944 * [0] [@2]: dpo-receive
2945 * ff02::1:ff00:0/104
2947 * [@0]: dpo-load-balance: [index:22 buckets:1 uRPF:21 to:[0:0]]
2948 * [0] [@2]: dpo-receive
2953 VLIB_CLI_COMMAND (set_ip6_flow_hash_command, static) =
2955 .path = "set ip6 flow-hash",
2957 "set ip6 flow-hash table <table-id> [src] [dst] [sport] [dport] [proto] [reverse]",
2958 .function = set_ip6_flow_hash_command_fn,
2962 static clib_error_t *
2963 show_ip6_local_command_fn (vlib_main_t * vm,
2964 unformat_input_t * input, vlib_cli_command_t * cmd)
2966 ip6_main_t *im = &ip6_main;
2967 ip_lookup_main_t *lm = &im->lookup_main;
2970 vlib_cli_output (vm, "Protocols handled by ip6_local");
2971 for (i = 0; i < ARRAY_LEN (lm->local_next_by_ip_protocol); i++)
2973 if (lm->local_next_by_ip_protocol[i] != IP_LOCAL_NEXT_PUNT)
2976 u32 node_index = vlib_get_node (vm,
2977 ip6_local_node.index)->
2978 next_nodes[lm->local_next_by_ip_protocol[i]];
2979 vlib_cli_output (vm, "%d: %U", i, format_vlib_node_name, vm,
2989 * Display the set of protocols handled by the local IPv6 stack.
2992 * Example of how to display local protocol table:
2993 * @cliexstart{show ip6 local}
2994 * Protocols handled by ip6_local
3002 VLIB_CLI_COMMAND (show_ip6_local, static) =
3004 .path = "show ip6 local",
3005 .function = show_ip6_local_command_fn,
3006 .short_help = "show ip6 local",
3010 #ifndef CLIB_MARCH_VARIANT
3012 vnet_set_ip6_classify_intfc (vlib_main_t * vm, u32 sw_if_index,
3015 vnet_main_t *vnm = vnet_get_main ();
3016 vnet_interface_main_t *im = &vnm->interface_main;
3017 ip6_main_t *ipm = &ip6_main;
3018 ip_lookup_main_t *lm = &ipm->lookup_main;
3019 vnet_classify_main_t *cm = &vnet_classify_main;
3020 ip6_address_t *if_addr;
3022 if (pool_is_free_index (im->sw_interfaces, sw_if_index))
3023 return VNET_API_ERROR_NO_MATCHING_INTERFACE;
3025 if (table_index != ~0 && pool_is_free_index (cm->tables, table_index))
3026 return VNET_API_ERROR_NO_SUCH_ENTRY;
3028 vec_validate (lm->classify_table_index_by_sw_if_index, sw_if_index);
3029 lm->classify_table_index_by_sw_if_index[sw_if_index] = table_index;
3031 if_addr = ip6_interface_first_address (ipm, sw_if_index);
3033 if (NULL != if_addr)
3035 fib_prefix_t pfx = {
3037 .fp_proto = FIB_PROTOCOL_IP6,
3038 .fp_addr.ip6 = *if_addr,
3042 fib_index = fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4,
3046 if (table_index != (u32) ~ 0)
3048 dpo_id_t dpo = DPO_INVALID;
3053 classify_dpo_create (DPO_PROTO_IP6, table_index));
3055 fib_table_entry_special_dpo_add (fib_index,
3057 FIB_SOURCE_CLASSIFY,
3058 FIB_ENTRY_FLAG_NONE, &dpo);
3063 fib_table_entry_special_remove (fib_index,
3064 &pfx, FIB_SOURCE_CLASSIFY);
3072 static clib_error_t *
3073 set_ip6_classify_command_fn (vlib_main_t * vm,
3074 unformat_input_t * input,
3075 vlib_cli_command_t * cmd)
3077 u32 table_index = ~0;
3078 int table_index_set = 0;
3079 u32 sw_if_index = ~0;
3082 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
3084 if (unformat (input, "table-index %d", &table_index))
3085 table_index_set = 1;
3086 else if (unformat (input, "intfc %U", unformat_vnet_sw_interface,
3087 vnet_get_main (), &sw_if_index))
3093 if (table_index_set == 0)
3094 return clib_error_return (0, "classify table-index must be specified");
3096 if (sw_if_index == ~0)
3097 return clib_error_return (0, "interface / subif must be specified");
3099 rv = vnet_set_ip6_classify_intfc (vm, sw_if_index, table_index);
3106 case VNET_API_ERROR_NO_MATCHING_INTERFACE:
3107 return clib_error_return (0, "No such interface");
3109 case VNET_API_ERROR_NO_SUCH_ENTRY:
3110 return clib_error_return (0, "No such classifier table");
3116 * Assign a classification table to an interface. The classification
3117 * table is created using the '<em>classify table</em>' and '<em>classify session</em>'
3118 * commands. Once the table is create, use this command to filter packets
3122 * Example of how to assign a classification table to an interface:
3123 * @cliexcmd{set ip6 classify intfc GigabitEthernet2/0/0 table-index 1}
3126 VLIB_CLI_COMMAND (set_ip6_classify_command, static) =
3128 .path = "set ip6 classify",
3130 "set ip6 classify intfc <interface> table-index <classify-idx>",
3131 .function = set_ip6_classify_command_fn,
3135 static clib_error_t *
3136 ip6_config (vlib_main_t * vm, unformat_input_t * input)
3138 ip6_main_t *im = &ip6_main;
3143 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
3145 if (unformat (input, "hash-buckets %d", &tmp))
3147 else if (unformat (input, "heap-size %U",
3148 unformat_memory_size, &heapsize))
3151 return clib_error_return (0, "unknown input '%U'",
3152 format_unformat_error, input);
3155 im->lookup_table_nbuckets = nbuckets;
3156 im->lookup_table_size = heapsize;
3161 VLIB_EARLY_CONFIG_FUNCTION (ip6_config, "ip6");
3164 * fd.io coding-style-patch-verification: ON
3167 * eval: (c-set-style "gnu")