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;
568 u32 thread_index = vm->thread_index;
569 ip6_main_t *im = &ip6_main;
570 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs;
571 u16 nexts[VLIB_FRAME_SIZE], *next;
573 from = vlib_frame_vector_args (frame);
574 n_left = frame->n_vectors;
577 vlib_get_buffers (vm, from, bufs, n_left);
581 const load_balance_t *lb0, *lb1;
582 const ip6_header_t *ip0, *ip1;
583 u32 lbi0, hc0, lbi1, hc1;
584 const dpo_id_t *dpo0, *dpo1;
586 /* Prefetch next iteration. */
588 vlib_prefetch_buffer_header (b[2], STORE);
589 vlib_prefetch_buffer_header (b[3], STORE);
591 CLIB_PREFETCH (b[2]->data, sizeof (ip0[0]), STORE);
592 CLIB_PREFETCH (b[3]->data, sizeof (ip0[0]), STORE);
595 ip0 = vlib_buffer_get_current (b[0]);
596 ip1 = vlib_buffer_get_current (b[1]);
597 lbi0 = vnet_buffer (b[0])->ip.adj_index[VLIB_TX];
598 lbi1 = vnet_buffer (b[1])->ip.adj_index[VLIB_TX];
600 lb0 = load_balance_get (lbi0);
601 lb1 = load_balance_get (lbi1);
604 * this node is for via FIBs we can re-use the hash value from the
605 * to node if present.
606 * We don't want to use the same hash value at each level in the recursion
607 * graph as that would lead to polarisation
611 if (PREDICT_FALSE (lb0->lb_n_buckets > 1))
613 if (PREDICT_TRUE (vnet_buffer (b[0])->ip.flow_hash))
615 hc0 = vnet_buffer (b[0])->ip.flow_hash =
616 vnet_buffer (b[0])->ip.flow_hash >> 1;
620 hc0 = vnet_buffer (b[0])->ip.flow_hash =
621 ip6_compute_flow_hash (ip0, lb0->lb_hash_config);
623 dpo0 = load_balance_get_fwd_bucket
624 (lb0, (hc0 & (lb0->lb_n_buckets_minus_1)));
628 dpo0 = load_balance_get_bucket_i (lb0, 0);
630 if (PREDICT_FALSE (lb1->lb_n_buckets > 1))
632 if (PREDICT_TRUE (vnet_buffer (b[1])->ip.flow_hash))
634 hc1 = vnet_buffer (b[1])->ip.flow_hash =
635 vnet_buffer (b[1])->ip.flow_hash >> 1;
639 hc1 = vnet_buffer (b[1])->ip.flow_hash =
640 ip6_compute_flow_hash (ip1, lb1->lb_hash_config);
642 dpo1 = load_balance_get_fwd_bucket
643 (lb1, (hc1 & (lb1->lb_n_buckets_minus_1)));
647 dpo1 = load_balance_get_bucket_i (lb1, 0);
650 next[0] = dpo0->dpoi_next_node;
651 next[1] = dpo1->dpoi_next_node;
653 /* Only process the HBH Option Header if explicitly configured to do so */
654 if (PREDICT_FALSE (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
656 next[0] = (dpo_is_adj (dpo0) && im->hbh_enabled) ?
657 (ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next[0];
659 /* Only process the HBH Option Header if explicitly configured to do so */
660 if (PREDICT_FALSE (ip1->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
662 next[1] = (dpo_is_adj (dpo1) && im->hbh_enabled) ?
663 (ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next[1];
666 vnet_buffer (b[0])->ip.adj_index[VLIB_TX] = dpo0->dpoi_index;
667 vnet_buffer (b[1])->ip.adj_index[VLIB_TX] = dpo1->dpoi_index;
669 vlib_increment_combined_counter
670 (cm, thread_index, lbi0, 1, vlib_buffer_length_in_chain (vm, b[0]));
671 vlib_increment_combined_counter
672 (cm, thread_index, lbi1, 1, vlib_buffer_length_in_chain (vm, b[1]));
681 const load_balance_t *lb0;
682 const ip6_header_t *ip0;
683 const dpo_id_t *dpo0;
686 ip0 = vlib_buffer_get_current (b[0]);
687 lbi0 = vnet_buffer (b[0])->ip.adj_index[VLIB_TX];
689 lb0 = load_balance_get (lbi0);
692 if (PREDICT_FALSE (lb0->lb_n_buckets > 1))
694 if (PREDICT_TRUE (vnet_buffer (b[0])->ip.flow_hash))
696 hc0 = vnet_buffer (b[0])->ip.flow_hash =
697 vnet_buffer (b[0])->ip.flow_hash >> 1;
701 hc0 = vnet_buffer (b[0])->ip.flow_hash =
702 ip6_compute_flow_hash (ip0, lb0->lb_hash_config);
704 dpo0 = load_balance_get_fwd_bucket
705 (lb0, (hc0 & (lb0->lb_n_buckets_minus_1)));
709 dpo0 = load_balance_get_bucket_i (lb0, 0);
712 next[0] = dpo0->dpoi_next_node;
713 vnet_buffer (b[0])->ip.adj_index[VLIB_TX] = dpo0->dpoi_index;
715 /* Only process the HBH Option Header if explicitly configured to do so */
716 if (PREDICT_FALSE (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
718 next[0] = (dpo_is_adj (dpo0) && im->hbh_enabled) ?
719 (ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next[0];
722 vlib_increment_combined_counter
723 (cm, thread_index, lbi0, 1, vlib_buffer_length_in_chain (vm, b[0]));
730 vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors);
732 if (node->flags & VLIB_NODE_FLAG_TRACE)
733 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
735 return frame->n_vectors;
739 VLIB_REGISTER_NODE (ip6_load_balance_node) =
741 .name = "ip6-load-balance",
742 .vector_size = sizeof (u32),
743 .sibling_of = "ip6-lookup",
744 .format_trace = format_ip6_lookup_trace,
750 /* Adjacency taken. */
755 /* Packet data, possibly *after* rewrite. */
756 u8 packet_data[128 - 1 * sizeof (u32)];
758 ip6_forward_next_trace_t;
760 #ifndef CLIB_MARCH_VARIANT
762 format_ip6_forward_next_trace (u8 * s, va_list * args)
764 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
765 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
766 ip6_forward_next_trace_t *t = va_arg (*args, ip6_forward_next_trace_t *);
767 u32 indent = format_get_indent (s);
769 s = format (s, "%U%U",
770 format_white_space, indent,
771 format_ip6_header, t->packet_data, sizeof (t->packet_data));
777 format_ip6_lookup_trace (u8 * s, va_list * args)
779 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
780 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
781 ip6_forward_next_trace_t *t = va_arg (*args, ip6_forward_next_trace_t *);
782 u32 indent = format_get_indent (s);
784 s = format (s, "fib %d dpo-idx %d flow hash: 0x%08x",
785 t->fib_index, t->adj_index, t->flow_hash);
786 s = format (s, "\n%U%U",
787 format_white_space, indent,
788 format_ip6_header, t->packet_data, sizeof (t->packet_data));
794 format_ip6_rewrite_trace (u8 * s, va_list * args)
796 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
797 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
798 ip6_forward_next_trace_t *t = va_arg (*args, ip6_forward_next_trace_t *);
799 u32 indent = format_get_indent (s);
801 s = format (s, "tx_sw_if_index %d adj-idx %d : %U flow hash: 0x%08x",
802 t->fib_index, t->adj_index, format_ip_adjacency,
803 t->adj_index, FORMAT_IP_ADJACENCY_NONE, t->flow_hash);
804 s = format (s, "\n%U%U",
805 format_white_space, indent,
806 format_ip_adjacency_packet_data,
807 t->adj_index, t->packet_data, sizeof (t->packet_data));
811 /* Common trace function for all ip6-forward next nodes. */
812 #ifndef CLIB_MARCH_VARIANT
814 ip6_forward_next_trace (vlib_main_t * vm,
815 vlib_node_runtime_t * node,
816 vlib_frame_t * frame, vlib_rx_or_tx_t which_adj_index)
819 ip6_main_t *im = &ip6_main;
821 n_left = frame->n_vectors;
822 from = vlib_frame_vector_args (frame);
827 vlib_buffer_t *b0, *b1;
828 ip6_forward_next_trace_t *t0, *t1;
830 /* Prefetch next iteration. */
831 vlib_prefetch_buffer_with_index (vm, from[2], LOAD);
832 vlib_prefetch_buffer_with_index (vm, from[3], LOAD);
837 b0 = vlib_get_buffer (vm, bi0);
838 b1 = vlib_get_buffer (vm, bi1);
840 if (b0->flags & VLIB_BUFFER_IS_TRACED)
842 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
843 t0->adj_index = vnet_buffer (b0)->ip.adj_index[which_adj_index];
844 t0->flow_hash = vnet_buffer (b0)->ip.flow_hash;
846 (vnet_buffer (b0)->sw_if_index[VLIB_TX] !=
847 (u32) ~ 0) ? vnet_buffer (b0)->sw_if_index[VLIB_TX] :
848 vec_elt (im->fib_index_by_sw_if_index,
849 vnet_buffer (b0)->sw_if_index[VLIB_RX]);
851 clib_memcpy_fast (t0->packet_data,
852 vlib_buffer_get_current (b0),
853 sizeof (t0->packet_data));
855 if (b1->flags & VLIB_BUFFER_IS_TRACED)
857 t1 = vlib_add_trace (vm, node, b1, sizeof (t1[0]));
858 t1->adj_index = vnet_buffer (b1)->ip.adj_index[which_adj_index];
859 t1->flow_hash = vnet_buffer (b1)->ip.flow_hash;
861 (vnet_buffer (b1)->sw_if_index[VLIB_TX] !=
862 (u32) ~ 0) ? vnet_buffer (b1)->sw_if_index[VLIB_TX] :
863 vec_elt (im->fib_index_by_sw_if_index,
864 vnet_buffer (b1)->sw_if_index[VLIB_RX]);
866 clib_memcpy_fast (t1->packet_data,
867 vlib_buffer_get_current (b1),
868 sizeof (t1->packet_data));
878 ip6_forward_next_trace_t *t0;
882 b0 = vlib_get_buffer (vm, bi0);
884 if (b0->flags & VLIB_BUFFER_IS_TRACED)
886 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
887 t0->adj_index = vnet_buffer (b0)->ip.adj_index[which_adj_index];
888 t0->flow_hash = vnet_buffer (b0)->ip.flow_hash;
890 (vnet_buffer (b0)->sw_if_index[VLIB_TX] !=
891 (u32) ~ 0) ? vnet_buffer (b0)->sw_if_index[VLIB_TX] :
892 vec_elt (im->fib_index_by_sw_if_index,
893 vnet_buffer (b0)->sw_if_index[VLIB_RX]);
895 clib_memcpy_fast (t0->packet_data,
896 vlib_buffer_get_current (b0),
897 sizeof (t0->packet_data));
904 /* Compute TCP/UDP/ICMP6 checksum in software. */
906 ip6_tcp_udp_icmp_compute_checksum (vlib_main_t * vm, vlib_buffer_t * p0,
907 ip6_header_t * ip0, int *bogus_lengthp)
910 u16 sum16, payload_length_host_byte_order;
911 u32 i, n_this_buffer, n_bytes_left;
912 u32 headers_size = sizeof (ip0[0]);
913 void *data_this_buffer;
915 ASSERT (bogus_lengthp);
918 /* Initialize checksum with ip header. */
919 sum0 = ip0->payload_length + clib_host_to_net_u16 (ip0->protocol);
920 payload_length_host_byte_order = clib_net_to_host_u16 (ip0->payload_length);
921 data_this_buffer = (void *) (ip0 + 1);
923 for (i = 0; i < ARRAY_LEN (ip0->src_address.as_uword); i++)
925 sum0 = ip_csum_with_carry (sum0,
926 clib_mem_unaligned (&ip0->
927 src_address.as_uword[i],
930 ip_csum_with_carry (sum0,
931 clib_mem_unaligned (&ip0->dst_address.as_uword[i],
935 /* some icmp packets may come with a "router alert" hop-by-hop extension header (e.g., mldv2 packets)
936 * or UDP-Ping packets */
937 if (PREDICT_FALSE (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
940 ip6_hop_by_hop_ext_t *ext_hdr =
941 (ip6_hop_by_hop_ext_t *) data_this_buffer;
943 /* validate really icmp6 next */
944 ASSERT ((ext_hdr->next_hdr == IP_PROTOCOL_ICMP6)
945 || (ext_hdr->next_hdr == IP_PROTOCOL_UDP));
947 skip_bytes = 8 * (1 + ext_hdr->n_data_u64s);
948 data_this_buffer = (void *) ((u8 *) data_this_buffer + skip_bytes);
950 payload_length_host_byte_order -= skip_bytes;
951 headers_size += skip_bytes;
954 n_bytes_left = n_this_buffer = payload_length_host_byte_order;
955 if (p0 && n_this_buffer + headers_size > p0->current_length)
958 headers_size ? p0->current_length - headers_size : 0;
961 sum0 = ip_incremental_checksum (sum0, data_this_buffer, n_this_buffer);
962 n_bytes_left -= n_this_buffer;
963 if (n_bytes_left == 0)
966 if (!(p0->flags & VLIB_BUFFER_NEXT_PRESENT))
971 p0 = vlib_get_buffer (vm, p0->next_buffer);
972 data_this_buffer = vlib_buffer_get_current (p0);
973 n_this_buffer = clib_min (p0->current_length, n_bytes_left);
976 sum16 = ~ip_csum_fold (sum0);
982 ip6_tcp_udp_icmp_validate_checksum (vlib_main_t * vm, vlib_buffer_t * p0)
984 ip6_header_t *ip0 = vlib_buffer_get_current (p0);
989 /* some icmp packets may come with a "router alert" hop-by-hop extension header (e.g., mldv2 packets) */
990 ASSERT (ip0->protocol == IP_PROTOCOL_TCP
991 || ip0->protocol == IP_PROTOCOL_ICMP6
992 || ip0->protocol == IP_PROTOCOL_UDP
993 || ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS);
995 udp0 = (void *) (ip0 + 1);
996 if (ip0->protocol == IP_PROTOCOL_UDP && udp0->checksum == 0)
998 p0->flags |= (VNET_BUFFER_F_L4_CHECKSUM_COMPUTED
999 | VNET_BUFFER_F_L4_CHECKSUM_CORRECT);
1003 sum16 = ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip0, &bogus_length);
1005 p0->flags |= (VNET_BUFFER_F_L4_CHECKSUM_COMPUTED
1006 | ((sum16 == 0) << VNET_BUFFER_F_LOG2_L4_CHECKSUM_CORRECT));
1013 * @brief returns number of links on which src is reachable.
1016 ip6_urpf_loose_check (ip6_main_t * im, vlib_buffer_t * b, ip6_header_t * i)
1018 const load_balance_t *lb0;
1022 fib_index = vec_elt (im->fib_index_by_sw_if_index,
1023 vnet_buffer (b)->sw_if_index[VLIB_RX]);
1025 (vnet_buffer (b)->sw_if_index[VLIB_TX] == (u32) ~ 0) ?
1026 fib_index : vnet_buffer (b)->sw_if_index[VLIB_TX];
1028 lbi = ip6_fib_table_fwding_lookup (im, fib_index, &i->src_address);
1029 lb0 = load_balance_get (lbi);
1031 return (fib_urpf_check_size (lb0->lb_urpf));
1035 ip6_next_proto_is_tcp_udp (vlib_buffer_t * p0, ip6_header_t * ip0,
1039 proto0 = ip6_locate_header (p0, ip0, IP_PROTOCOL_UDP, udp_offset0);
1040 if (proto0 != IP_PROTOCOL_UDP)
1042 proto0 = ip6_locate_header (p0, ip0, IP_PROTOCOL_TCP, udp_offset0);
1043 proto0 = (proto0 == IP_PROTOCOL_TCP) ? proto0 : 0;
1049 VNET_FEATURE_ARC_INIT (ip6_local) =
1051 .arc_name = "ip6-local",
1052 .start_nodes = VNET_FEATURES ("ip6-local"),
1057 ip6_local_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
1058 vlib_frame_t * frame, int head_of_feature_arc)
1060 ip6_main_t *im = &ip6_main;
1061 ip_lookup_main_t *lm = &im->lookup_main;
1062 u32 *from, n_left_from;
1063 vlib_node_runtime_t *error_node =
1064 vlib_node_get_runtime (vm, ip6_input_node.index);
1065 u8 arc_index = vnet_feat_arc_ip6_local.feature_arc_index;
1066 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
1067 u16 nexts[VLIB_FRAME_SIZE], *next;
1069 from = vlib_frame_vector_args (frame);
1070 n_left_from = frame->n_vectors;
1072 if (node->flags & VLIB_NODE_FLAG_TRACE)
1073 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
1075 vlib_get_buffers (vm, from, bufs, n_left_from);
1079 while (n_left_from > 2)
1081 /* Prefetch next iteration. */
1082 if (n_left_from >= 6)
1084 vlib_prefetch_buffer_header (b[4], STORE);
1085 vlib_prefetch_buffer_header (b[5], STORE);
1086 vlib_prefetch_buffer_data (b[2], LOAD);
1087 vlib_prefetch_buffer_data (b[3], LOAD);
1091 error[0] = IP6_ERROR_UNKNOWN_PROTOCOL;
1092 error[1] = IP6_ERROR_UNKNOWN_PROTOCOL;
1094 ip6_header_t *ip[2];
1095 ip[0] = vlib_buffer_get_current (b[0]);
1096 ip[1] = vlib_buffer_get_current (b[1]);
1098 if (head_of_feature_arc)
1100 vnet_buffer (b[0])->l3_hdr_offset = b[0]->current_data;
1101 vnet_buffer (b[1])->l3_hdr_offset = b[1]->current_data;
1104 type[0] = lm->builtin_protocol_by_ip_protocol[ip[0]->protocol];
1105 type[1] = lm->builtin_protocol_by_ip_protocol[ip[1]->protocol];
1108 flags[0] = b[0]->flags;
1109 flags[1] = b[1]->flags;
1111 u32 good_l4_csum[2];
1113 flags[0] & (VNET_BUFFER_F_L4_CHECKSUM_CORRECT |
1114 VNET_BUFFER_F_OFFLOAD_TCP_CKSUM |
1115 VNET_BUFFER_F_OFFLOAD_UDP_CKSUM);
1117 flags[1] & (VNET_BUFFER_F_L4_CHECKSUM_CORRECT |
1118 VNET_BUFFER_F_OFFLOAD_TCP_CKSUM |
1119 VNET_BUFFER_F_OFFLOAD_UDP_CKSUM);
1121 u32 udp_offset[2] = { };
1124 ip6_next_proto_is_tcp_udp (b[0], ip[0], &udp_offset[0]);
1126 ip6_next_proto_is_tcp_udp (b[1], ip[1], &udp_offset[1]);
1127 i16 len_diff[2] = { 0 };
1128 if (PREDICT_TRUE (is_tcp_udp[0]))
1131 (udp_header_t *) ((u8 *) ip[0] + udp_offset[0]);
1132 good_l4_csum[0] |= type[0] == IP_BUILTIN_PROTOCOL_UDP
1133 && udp->checksum == 0;
1134 /* optimistically verify UDP length. */
1135 u16 ip_len, udp_len;
1136 ip_len = clib_net_to_host_u16 (ip[0]->payload_length);
1137 udp_len = clib_net_to_host_u16 (udp->length);
1138 len_diff[0] = ip_len - udp_len;
1140 if (PREDICT_TRUE (is_tcp_udp[1]))
1143 (udp_header_t *) ((u8 *) ip[1] + udp_offset[1]);
1144 good_l4_csum[1] |= type[1] == IP_BUILTIN_PROTOCOL_UDP
1145 && udp->checksum == 0;
1146 /* optimistically verify UDP length. */
1147 u16 ip_len, udp_len;
1148 ip_len = clib_net_to_host_u16 (ip[1]->payload_length);
1149 udp_len = clib_net_to_host_u16 (udp->length);
1150 len_diff[1] = ip_len - udp_len;
1153 good_l4_csum[0] |= type[0] == IP_BUILTIN_PROTOCOL_UNKNOWN;
1154 good_l4_csum[1] |= type[1] == IP_BUILTIN_PROTOCOL_UNKNOWN;
1156 len_diff[0] = type[0] == IP_BUILTIN_PROTOCOL_UDP ? len_diff[0] : 0;
1157 len_diff[1] = type[1] == IP_BUILTIN_PROTOCOL_UDP ? len_diff[1] : 0;
1160 need_csum[0] = type[0] != IP_BUILTIN_PROTOCOL_UNKNOWN
1162 && !(flags[0] & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED);
1163 need_csum[1] = type[1] != IP_BUILTIN_PROTOCOL_UNKNOWN
1165 && !(flags[1] & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED);
1166 if (PREDICT_FALSE (need_csum[0]))
1168 flags[0] = ip6_tcp_udp_icmp_validate_checksum (vm, b[0]);
1169 good_l4_csum[0] = flags[0] & VNET_BUFFER_F_L4_CHECKSUM_CORRECT;
1171 if (PREDICT_FALSE (need_csum[1]))
1173 flags[1] = ip6_tcp_udp_icmp_validate_checksum (vm, b[1]);
1174 good_l4_csum[1] = flags[1] & VNET_BUFFER_F_L4_CHECKSUM_CORRECT;
1177 error[0] = IP6_ERROR_UNKNOWN_PROTOCOL;
1178 error[0] = len_diff[0] < 0 ? IP6_ERROR_UDP_LENGTH : error[0];
1179 error[1] = IP6_ERROR_UNKNOWN_PROTOCOL;
1180 error[1] = len_diff[1] < 0 ? IP6_ERROR_UDP_LENGTH : error[1];
1182 STATIC_ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_UDP ==
1183 IP6_ERROR_UDP_CHECKSUM,
1184 "Wrong IP6 errors constants");
1185 STATIC_ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_ICMP ==
1186 IP6_ERROR_ICMP_CHECKSUM,
1187 "Wrong IP6 errors constants");
1190 !good_l4_csum[0] ? IP6_ERROR_UDP_CHECKSUM + type[0] : error[0];
1192 !good_l4_csum[1] ? IP6_ERROR_UDP_CHECKSUM + type[1] : error[1];
1194 /* Drop packets from unroutable hosts. */
1195 /* If this is a neighbor solicitation (ICMP), skip source RPF check */
1197 unroutable[0] = error[0] == IP6_ERROR_UNKNOWN_PROTOCOL
1198 && type[0] != IP_BUILTIN_PROTOCOL_ICMP
1199 && !ip6_address_is_link_local_unicast (&ip[0]->src_address);
1200 unroutable[1] = error[1] == IP6_ERROR_UNKNOWN_PROTOCOL
1201 && type[1] != IP_BUILTIN_PROTOCOL_ICMP
1202 && !ip6_address_is_link_local_unicast (&ip[1]->src_address);
1203 if (PREDICT_FALSE (unroutable[0]))
1206 !ip6_urpf_loose_check (im, b[0],
1207 ip[0]) ? IP6_ERROR_SRC_LOOKUP_MISS
1210 if (PREDICT_FALSE (unroutable[1]))
1213 !ip6_urpf_loose_check (im, b[1],
1214 ip[1]) ? IP6_ERROR_SRC_LOOKUP_MISS
1218 vnet_buffer (b[0])->ip.fib_index =
1219 vnet_buffer (b[0])->sw_if_index[VLIB_TX] != ~0 ?
1220 vnet_buffer (b[0])->sw_if_index[VLIB_TX] :
1221 vnet_buffer (b[0])->ip.fib_index;
1222 vnet_buffer (b[1])->ip.fib_index =
1223 vnet_buffer (b[1])->sw_if_index[VLIB_TX] != ~0 ?
1224 vnet_buffer (b[1])->sw_if_index[VLIB_TX] :
1225 vnet_buffer (b[1])->ip.fib_index;
1226 } /* head_of_feature_arc */
1228 next[0] = lm->local_next_by_ip_protocol[ip[0]->protocol];
1230 error[0] != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next[0];
1231 next[1] = lm->local_next_by_ip_protocol[ip[1]->protocol];
1233 error[1] != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next[1];
1235 b[0]->error = error_node->errors[0];
1236 b[1]->error = error_node->errors[1];
1238 if (head_of_feature_arc)
1241 ip6_unknown[0] = error[0] == (u8) IP6_ERROR_UNKNOWN_PROTOCOL;
1242 ip6_unknown[1] = error[1] == (u8) IP6_ERROR_UNKNOWN_PROTOCOL;
1243 if (PREDICT_TRUE (ip6_unknown[0]))
1245 u32 next32 = next[0];
1246 vnet_feature_arc_start (arc_index,
1247 vnet_buffer (b[0])->sw_if_index
1248 [VLIB_RX], &next32, b[0]);
1251 if (PREDICT_TRUE (ip6_unknown[1]))
1253 u32 next32 = next[1];
1254 vnet_feature_arc_start (arc_index,
1255 vnet_buffer (b[1])->sw_if_index
1256 [VLIB_RX], &next32, b[1]);
1270 error = IP6_ERROR_UNKNOWN_PROTOCOL;
1273 ip = vlib_buffer_get_current (b[0]);
1275 if (head_of_feature_arc)
1277 vnet_buffer (b[0])->l3_hdr_offset = b[0]->current_data;
1278 u8 type = lm->builtin_protocol_by_ip_protocol[ip->protocol];
1280 u32 flags = b[0]->flags;
1282 flags & (VNET_BUFFER_F_L4_CHECKSUM_CORRECT |
1283 VNET_BUFFER_F_OFFLOAD_TCP_CKSUM |
1284 VNET_BUFFER_F_OFFLOAD_UDP_CKSUM);
1288 u8 is_tcp_udp = ip6_next_proto_is_tcp_udp (b[0], ip, &udp_offset);
1289 if (PREDICT_TRUE (is_tcp_udp))
1291 udp_header_t *udp = (udp_header_t *) ((u8 *) ip + udp_offset);
1292 /* Don't verify UDP checksum for packets with explicit zero checksum. */
1293 good_l4_csum |= type == IP_BUILTIN_PROTOCOL_UDP
1294 && udp->checksum == 0;
1295 /* optimistically verify UDP length. */
1296 u16 ip_len, udp_len;
1297 ip_len = clib_net_to_host_u16 (ip->payload_length);
1298 udp_len = clib_net_to_host_u16 (udp->length);
1299 len_diff = ip_len - udp_len;
1302 good_l4_csum |= type == IP_BUILTIN_PROTOCOL_UNKNOWN;
1303 len_diff = type == IP_BUILTIN_PROTOCOL_UDP ? len_diff : 0;
1305 u8 need_csum = type != IP_BUILTIN_PROTOCOL_UNKNOWN && !good_l4_csum
1306 && !(flags & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED);
1307 if (PREDICT_FALSE (need_csum))
1309 flags = ip6_tcp_udp_icmp_validate_checksum (vm, b[0]);
1310 good_l4_csum = flags & VNET_BUFFER_F_L4_CHECKSUM_CORRECT;
1313 error = IP6_ERROR_UNKNOWN_PROTOCOL;
1314 error = len_diff < 0 ? IP6_ERROR_UDP_LENGTH : error;
1316 STATIC_ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_UDP ==
1317 IP6_ERROR_UDP_CHECKSUM,
1318 "Wrong IP6 errors constants");
1319 STATIC_ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_ICMP ==
1320 IP6_ERROR_ICMP_CHECKSUM,
1321 "Wrong IP6 errors constants");
1323 error = !good_l4_csum ? IP6_ERROR_UDP_CHECKSUM + type : error;
1325 /* Drop packets from unroutable hosts. */
1326 /* If this is a neighbor solicitation (ICMP), skip source RPF check */
1327 u8 unroutable = error == IP6_ERROR_UNKNOWN_PROTOCOL
1328 && type != IP_BUILTIN_PROTOCOL_ICMP
1329 && !ip6_address_is_link_local_unicast (&ip->src_address);
1330 if (PREDICT_FALSE (unroutable))
1333 !ip6_urpf_loose_check (im, b[0],
1334 ip) ? IP6_ERROR_SRC_LOOKUP_MISS :
1338 vnet_buffer (b[0])->ip.fib_index =
1339 vnet_buffer (b[0])->sw_if_index[VLIB_TX] != ~0 ?
1340 vnet_buffer (b[0])->sw_if_index[VLIB_TX] :
1341 vnet_buffer (b[0])->ip.fib_index;
1342 } /* head_of_feature_arc */
1344 next[0] = lm->local_next_by_ip_protocol[ip->protocol];
1346 error != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next[0];
1348 b[0]->error = error_node->errors[0];
1350 if (head_of_feature_arc)
1352 if (PREDICT_TRUE (error == (u8) IP6_ERROR_UNKNOWN_PROTOCOL))
1354 u32 next32 = next[0];
1355 vnet_feature_arc_start (arc_index,
1356 vnet_buffer (b[0])->sw_if_index
1357 [VLIB_RX], &next32, b[0]);
1368 vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors);
1369 return frame->n_vectors;
1372 VLIB_NODE_FN (ip6_local_node) (vlib_main_t * vm, vlib_node_runtime_t * node,
1373 vlib_frame_t * frame)
1375 return ip6_local_inline (vm, node, frame, 1 /* head of feature arc */ );
1379 VLIB_REGISTER_NODE (ip6_local_node) =
1381 .name = "ip6-local",
1382 .vector_size = sizeof (u32),
1383 .format_trace = format_ip6_forward_next_trace,
1384 .n_next_nodes = IP_LOCAL_N_NEXT,
1387 [IP_LOCAL_NEXT_DROP] = "ip6-drop",
1388 [IP_LOCAL_NEXT_PUNT] = "ip6-punt",
1389 [IP_LOCAL_NEXT_UDP_LOOKUP] = "ip6-udp-lookup",
1390 [IP_LOCAL_NEXT_ICMP] = "ip6-icmp-input",
1391 [IP_LOCAL_NEXT_REASSEMBLY] = "ip6-reassembly",
1396 VLIB_NODE_FN (ip6_local_end_of_arc_node) (vlib_main_t * vm,
1397 vlib_node_runtime_t * node,
1398 vlib_frame_t * frame)
1400 return ip6_local_inline (vm, node, frame, 0 /* head of feature arc */ );
1404 VLIB_REGISTER_NODE (ip6_local_end_of_arc_node) = {
1405 .name = "ip6-local-end-of-arc",
1406 .vector_size = sizeof (u32),
1408 .format_trace = format_ip6_forward_next_trace,
1409 .sibling_of = "ip6-local",
1412 VNET_FEATURE_INIT (ip6_local_end_of_arc, static) = {
1413 .arc_name = "ip6-local",
1414 .node_name = "ip6-local-end-of-arc",
1415 .runs_before = 0, /* not before any other features */
1419 #ifdef CLIB_MARCH_VARIANT
1420 extern vlib_node_registration_t ip6_local_node;
1425 ip6_register_protocol (u32 protocol, u32 node_index)
1427 vlib_main_t *vm = vlib_get_main ();
1428 ip6_main_t *im = &ip6_main;
1429 ip_lookup_main_t *lm = &im->lookup_main;
1431 ASSERT (protocol < ARRAY_LEN (lm->local_next_by_ip_protocol));
1432 lm->local_next_by_ip_protocol[protocol] =
1433 vlib_node_add_next (vm, ip6_local_node.index, node_index);
1437 ip6_unregister_protocol (u32 protocol)
1439 ip6_main_t *im = &ip6_main;
1440 ip_lookup_main_t *lm = &im->lookup_main;
1442 ASSERT (protocol < ARRAY_LEN (lm->local_next_by_ip_protocol));
1443 lm->local_next_by_ip_protocol[protocol] = IP_LOCAL_NEXT_PUNT;
1447 ip6_probe_neighbor (vlib_main_t * vm, ip6_address_t * dst, u32 sw_if_index,
1450 vnet_main_t *vnm = vnet_get_main ();
1451 ip6_main_t *im = &ip6_main;
1452 icmp6_neighbor_solicitation_header_t *h;
1454 ip_interface_address_t *ia;
1455 ip_adjacency_t *adj;
1456 vnet_hw_interface_t *hi;
1457 vnet_sw_interface_t *si;
1463 si = vnet_get_sw_interface (vnm, sw_if_index);
1465 if (!(si->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP))
1467 return clib_error_return (0, "%U: interface %U down",
1468 format_ip6_address, dst,
1469 format_vnet_sw_if_index_name, vnm,
1474 ip6_interface_address_matching_destination (im, dst, sw_if_index, &ia);
1477 vnm->api_errno = VNET_API_ERROR_NO_MATCHING_INTERFACE;
1478 return clib_error_return
1479 (0, "no matching interface address for destination %U (interface %U)",
1480 format_ip6_address, dst,
1481 format_vnet_sw_if_index_name, vnm, sw_if_index);
1485 vlib_packet_template_get_packet (vm,
1486 &im->discover_neighbor_packet_template,
1489 return clib_error_return (0, "ICMP6 NS packet allocation failed");
1491 hi = vnet_get_sup_hw_interface (vnm, sw_if_index);
1493 /* Destination address is a solicited node multicast address. We need to fill in
1494 the low 24 bits with low 24 bits of target's address. */
1495 h->ip.dst_address.as_u8[13] = dst->as_u8[13];
1496 h->ip.dst_address.as_u8[14] = dst->as_u8[14];
1497 h->ip.dst_address.as_u8[15] = dst->as_u8[15];
1499 h->ip.src_address = src[0];
1500 h->neighbor.target_address = dst[0];
1502 if (PREDICT_FALSE (!hi->hw_address))
1504 return clib_error_return (0, "%U: interface %U do not support ip probe",
1505 format_ip6_address, dst,
1506 format_vnet_sw_if_index_name, vnm,
1510 clib_memcpy_fast (h->link_layer_option.ethernet_address, hi->hw_address,
1511 vec_len (hi->hw_address));
1513 h->neighbor.icmp.checksum =
1514 ip6_tcp_udp_icmp_compute_checksum (vm, 0, &h->ip, &bogus_length);
1515 ASSERT (bogus_length == 0);
1517 b = vlib_get_buffer (vm, bi);
1518 vnet_buffer (b)->sw_if_index[VLIB_RX] =
1519 vnet_buffer (b)->sw_if_index[VLIB_TX] = sw_if_index;
1521 /* Add encapsulation string for software interface (e.g. ethernet header). */
1522 ip46_address_t nh = {
1526 ai = adj_nbr_add_or_lock (FIB_PROTOCOL_IP6,
1527 VNET_LINK_IP6, &nh, sw_if_index);
1530 /* Peer has been previously resolved, retrieve glean adj instead */
1531 if (adj->lookup_next_index == IP_LOOKUP_NEXT_REWRITE && refresh == 0)
1534 ai = adj_glean_add_or_lock (FIB_PROTOCOL_IP6,
1535 VNET_LINK_IP6, sw_if_index, &nh);
1539 vnet_rewrite_one_header (adj[0], h, sizeof (ethernet_header_t));
1540 vlib_buffer_advance (b, -adj->rewrite_header.data_bytes);
1543 vlib_frame_t *f = vlib_get_frame_to_node (vm, hi->output_node_index);
1544 u32 *to_next = vlib_frame_vector_args (f);
1547 vlib_put_frame_to_node (vm, hi->output_node_index, f);
1551 return /* no error */ 0;
1557 IP6_REWRITE_NEXT_DROP,
1558 IP6_REWRITE_NEXT_ICMP_ERROR,
1559 IP6_REWRITE_NEXT_FRAGMENT,
1560 IP6_REWRITE_N_NEXT /* Last */
1561 } ip6_rewrite_next_t;
1564 * This bits of an IPv6 address to mask to construct a multicast
1567 #define IP6_MCAST_ADDR_MASK 0xffffffff
1570 ip6_mtu_check (vlib_buffer_t * b, u16 packet_bytes,
1571 u16 adj_packet_bytes, bool is_locally_generated,
1572 u32 * next, u32 * error)
1574 if (adj_packet_bytes >= 1280 && packet_bytes > adj_packet_bytes)
1576 if (is_locally_generated)
1578 /* IP fragmentation */
1579 ip_frag_set_vnet_buffer (b, adj_packet_bytes,
1580 IP6_FRAG_NEXT_IP6_REWRITE, 0);
1581 *next = IP6_REWRITE_NEXT_FRAGMENT;
1582 *error = IP6_ERROR_MTU_EXCEEDED;
1586 *error = IP6_ERROR_MTU_EXCEEDED;
1587 icmp6_error_set_vnet_buffer (b, ICMP6_packet_too_big, 0,
1589 *next = IP6_REWRITE_NEXT_ICMP_ERROR;
1595 ip6_rewrite_inline_with_gso (vlib_main_t * vm,
1596 vlib_node_runtime_t * node,
1597 vlib_frame_t * frame,
1598 int do_counters, int is_midchain, int is_mcast,
1601 ip_lookup_main_t *lm = &ip6_main.lookup_main;
1602 u32 *from = vlib_frame_vector_args (frame);
1603 u32 n_left_from, n_left_to_next, *to_next, next_index;
1604 vlib_node_runtime_t *error_node =
1605 vlib_node_get_runtime (vm, ip6_input_node.index);
1607 n_left_from = frame->n_vectors;
1608 next_index = node->cached_next_index;
1609 u32 thread_index = vm->thread_index;
1611 while (n_left_from > 0)
1613 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1615 while (n_left_from >= 4 && n_left_to_next >= 2)
1617 ip_adjacency_t *adj0, *adj1;
1618 vlib_buffer_t *p0, *p1;
1619 ip6_header_t *ip0, *ip1;
1620 u32 pi0, rw_len0, next0, error0, adj_index0;
1621 u32 pi1, rw_len1, next1, error1, adj_index1;
1622 u32 tx_sw_if_index0, tx_sw_if_index1;
1623 bool is_locally_originated0, is_locally_originated1;
1625 /* Prefetch next iteration. */
1627 vlib_buffer_t *p2, *p3;
1629 p2 = vlib_get_buffer (vm, from[2]);
1630 p3 = vlib_get_buffer (vm, from[3]);
1632 vlib_prefetch_buffer_header (p2, LOAD);
1633 vlib_prefetch_buffer_header (p3, LOAD);
1635 CLIB_PREFETCH (p2->pre_data, 32, STORE);
1636 CLIB_PREFETCH (p3->pre_data, 32, STORE);
1638 CLIB_PREFETCH (p2->data, sizeof (ip0[0]), STORE);
1639 CLIB_PREFETCH (p3->data, sizeof (ip0[0]), STORE);
1642 pi0 = to_next[0] = from[0];
1643 pi1 = to_next[1] = from[1];
1648 n_left_to_next -= 2;
1650 p0 = vlib_get_buffer (vm, pi0);
1651 p1 = vlib_get_buffer (vm, pi1);
1653 adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
1654 adj_index1 = vnet_buffer (p1)->ip.adj_index[VLIB_TX];
1656 ip0 = vlib_buffer_get_current (p0);
1657 ip1 = vlib_buffer_get_current (p1);
1659 error0 = error1 = IP6_ERROR_NONE;
1660 next0 = next1 = IP6_REWRITE_NEXT_DROP;
1662 is_locally_originated0 =
1663 p0->flags & VNET_BUFFER_F_LOCALLY_ORIGINATED;
1664 if (PREDICT_TRUE (!is_locally_originated0))
1666 i32 hop_limit0 = ip0->hop_limit;
1668 /* Input node should have reject packets with hop limit 0. */
1669 ASSERT (ip0->hop_limit > 0);
1673 ip0->hop_limit = hop_limit0;
1676 * If the hop count drops below 1 when forwarding, generate
1679 if (PREDICT_FALSE (hop_limit0 <= 0))
1681 error0 = IP6_ERROR_TIME_EXPIRED;
1682 next0 = IP6_REWRITE_NEXT_ICMP_ERROR;
1683 vnet_buffer (p0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
1684 icmp6_error_set_vnet_buffer (p0, ICMP6_time_exceeded,
1685 ICMP6_time_exceeded_ttl_exceeded_in_transit,
1691 p0->flags &= ~VNET_BUFFER_F_LOCALLY_ORIGINATED;
1693 is_locally_originated1 =
1694 p1->flags & VNET_BUFFER_F_LOCALLY_ORIGINATED;
1695 if (PREDICT_TRUE (!is_locally_originated1))
1697 i32 hop_limit1 = ip1->hop_limit;
1699 /* Input node should have reject packets with hop limit 0. */
1700 ASSERT (ip1->hop_limit > 0);
1704 ip1->hop_limit = hop_limit1;
1707 * If the hop count drops below 1 when forwarding, generate
1710 if (PREDICT_FALSE (hop_limit1 <= 0))
1712 error1 = IP6_ERROR_TIME_EXPIRED;
1713 next1 = IP6_REWRITE_NEXT_ICMP_ERROR;
1714 vnet_buffer (p1)->sw_if_index[VLIB_TX] = (u32) ~ 0;
1715 icmp6_error_set_vnet_buffer (p1, ICMP6_time_exceeded,
1716 ICMP6_time_exceeded_ttl_exceeded_in_transit,
1722 p1->flags &= ~VNET_BUFFER_F_LOCALLY_ORIGINATED;
1724 adj0 = adj_get (adj_index0);
1725 adj1 = adj_get (adj_index1);
1727 rw_len0 = adj0[0].rewrite_header.data_bytes;
1728 rw_len1 = adj1[0].rewrite_header.data_bytes;
1729 vnet_buffer (p0)->ip.save_rewrite_length = rw_len0;
1730 vnet_buffer (p1)->ip.save_rewrite_length = rw_len1;
1734 vlib_increment_combined_counter
1735 (&adjacency_counters,
1736 thread_index, adj_index0, 1,
1737 vlib_buffer_length_in_chain (vm, p0) + rw_len0);
1738 vlib_increment_combined_counter
1739 (&adjacency_counters,
1740 thread_index, adj_index1, 1,
1741 vlib_buffer_length_in_chain (vm, p1) + rw_len1);
1744 /* Check MTU of outgoing interface. */
1746 clib_net_to_host_u16 (ip0->payload_length) +
1747 sizeof (ip6_header_t);
1749 clib_net_to_host_u16 (ip1->payload_length) +
1750 sizeof (ip6_header_t);
1751 if (do_gso && (p0->flags & VNET_BUFFER_F_GSO))
1752 ip0_len = gso_mtu_sz (p0);
1753 if (do_gso && (p1->flags & VNET_BUFFER_F_GSO))
1754 ip1_len = gso_mtu_sz (p1);
1758 ip6_mtu_check (p0, ip0_len,
1759 adj0[0].rewrite_header.max_l3_packet_bytes,
1760 is_locally_originated0, &next0, &error0);
1761 ip6_mtu_check (p1, ip1_len,
1762 adj1[0].rewrite_header.max_l3_packet_bytes,
1763 is_locally_originated1, &next1, &error1);
1765 /* Don't adjust the buffer for hop count issue; icmp-error node
1766 * wants to see the IP header */
1767 if (PREDICT_TRUE (error0 == IP6_ERROR_NONE))
1769 p0->current_data -= rw_len0;
1770 p0->current_length += rw_len0;
1772 tx_sw_if_index0 = adj0[0].rewrite_header.sw_if_index;
1773 vnet_buffer (p0)->sw_if_index[VLIB_TX] = tx_sw_if_index0;
1774 next0 = adj0[0].rewrite_header.next_index;
1777 (adj0[0].rewrite_header.flags & VNET_REWRITE_HAS_FEATURES))
1778 vnet_feature_arc_start (lm->output_feature_arc_index,
1779 tx_sw_if_index0, &next0, p0);
1783 p0->error = error_node->errors[error0];
1785 if (PREDICT_TRUE (error1 == IP6_ERROR_NONE))
1787 p1->current_data -= rw_len1;
1788 p1->current_length += rw_len1;
1790 tx_sw_if_index1 = adj1[0].rewrite_header.sw_if_index;
1791 vnet_buffer (p1)->sw_if_index[VLIB_TX] = tx_sw_if_index1;
1792 next1 = adj1[0].rewrite_header.next_index;
1795 (adj1[0].rewrite_header.flags & VNET_REWRITE_HAS_FEATURES))
1796 vnet_feature_arc_start (lm->output_feature_arc_index,
1797 tx_sw_if_index1, &next1, p1);
1801 p1->error = error_node->errors[error1];
1806 /* before we paint on the next header, update the L4
1807 * checksums if required, since there's no offload on a tunnel */
1808 calc_checksums (vm, p0);
1809 calc_checksums (vm, p1);
1812 /* Guess we are only writing on simple Ethernet header. */
1813 vnet_rewrite_two_headers (adj0[0], adj1[0],
1814 ip0, ip1, sizeof (ethernet_header_t));
1818 if (adj0->sub_type.midchain.fixup_func)
1819 adj0->sub_type.midchain.fixup_func
1820 (vm, adj0, p0, adj0->sub_type.midchain.fixup_data);
1821 if (adj1->sub_type.midchain.fixup_func)
1822 adj1->sub_type.midchain.fixup_func
1823 (vm, adj1, p1, adj1->sub_type.midchain.fixup_data);
1828 * copy bytes from the IP address into the MAC rewrite
1830 vnet_ip_mcast_fixup_header (IP6_MCAST_ADDR_MASK,
1832 rewrite_header.dst_mcast_offset,
1833 &ip0->dst_address.as_u32[3],
1835 vnet_ip_mcast_fixup_header (IP6_MCAST_ADDR_MASK,
1837 rewrite_header.dst_mcast_offset,
1838 &ip1->dst_address.as_u32[3],
1842 vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
1843 to_next, n_left_to_next,
1844 pi0, pi1, next0, next1);
1847 while (n_left_from > 0 && n_left_to_next > 0)
1849 ip_adjacency_t *adj0;
1853 u32 adj_index0, next0, error0;
1854 u32 tx_sw_if_index0;
1855 bool is_locally_originated0;
1857 pi0 = to_next[0] = from[0];
1859 p0 = vlib_get_buffer (vm, pi0);
1861 adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
1863 adj0 = adj_get (adj_index0);
1865 ip0 = vlib_buffer_get_current (p0);
1867 error0 = IP6_ERROR_NONE;
1868 next0 = IP6_REWRITE_NEXT_DROP;
1870 /* Check hop limit */
1871 is_locally_originated0 =
1872 p0->flags & VNET_BUFFER_F_LOCALLY_ORIGINATED;
1873 if (PREDICT_TRUE (!is_locally_originated0))
1875 i32 hop_limit0 = ip0->hop_limit;
1877 ASSERT (ip0->hop_limit > 0);
1881 ip0->hop_limit = hop_limit0;
1883 if (PREDICT_FALSE (hop_limit0 <= 0))
1886 * If the hop count drops below 1 when forwarding, generate
1889 error0 = IP6_ERROR_TIME_EXPIRED;
1890 next0 = IP6_REWRITE_NEXT_ICMP_ERROR;
1891 vnet_buffer (p0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
1892 icmp6_error_set_vnet_buffer (p0, ICMP6_time_exceeded,
1893 ICMP6_time_exceeded_ttl_exceeded_in_transit,
1899 p0->flags &= ~VNET_BUFFER_F_LOCALLY_ORIGINATED;
1904 calc_checksums (vm, p0);
1907 /* Guess we are only writing on simple Ethernet header. */
1908 vnet_rewrite_one_header (adj0[0], ip0, sizeof (ethernet_header_t));
1910 /* Update packet buffer attributes/set output interface. */
1911 rw_len0 = adj0[0].rewrite_header.data_bytes;
1912 vnet_buffer (p0)->ip.save_rewrite_length = rw_len0;
1916 vlib_increment_combined_counter
1917 (&adjacency_counters,
1918 thread_index, adj_index0, 1,
1919 vlib_buffer_length_in_chain (vm, p0) + rw_len0);
1922 /* Check MTU of outgoing interface. */
1924 clib_net_to_host_u16 (ip0->payload_length) +
1925 sizeof (ip6_header_t);
1926 if (do_gso && (p0->flags & VNET_BUFFER_F_GSO))
1927 ip0_len = gso_mtu_sz (p0);
1929 ip6_mtu_check (p0, ip0_len,
1930 adj0[0].rewrite_header.max_l3_packet_bytes,
1931 is_locally_originated0, &next0, &error0);
1933 /* Don't adjust the buffer for hop count issue; icmp-error node
1934 * wants to see the IP header */
1935 if (PREDICT_TRUE (error0 == IP6_ERROR_NONE))
1937 p0->current_data -= rw_len0;
1938 p0->current_length += rw_len0;
1940 tx_sw_if_index0 = adj0[0].rewrite_header.sw_if_index;
1942 vnet_buffer (p0)->sw_if_index[VLIB_TX] = tx_sw_if_index0;
1943 next0 = adj0[0].rewrite_header.next_index;
1946 (adj0[0].rewrite_header.flags & VNET_REWRITE_HAS_FEATURES))
1947 vnet_feature_arc_start (lm->output_feature_arc_index,
1948 tx_sw_if_index0, &next0, p0);
1952 p0->error = error_node->errors[error0];
1957 if (adj0->sub_type.midchain.fixup_func)
1958 adj0->sub_type.midchain.fixup_func
1959 (vm, adj0, p0, adj0->sub_type.midchain.fixup_data);
1963 vnet_ip_mcast_fixup_header (IP6_MCAST_ADDR_MASK,
1965 rewrite_header.dst_mcast_offset,
1966 &ip0->dst_address.as_u32[3],
1973 n_left_to_next -= 1;
1975 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1976 to_next, n_left_to_next,
1980 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1983 /* Need to do trace after rewrites to pick up new packet data. */
1984 if (node->flags & VLIB_NODE_FLAG_TRACE)
1985 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
1987 return frame->n_vectors;
1991 ip6_rewrite_inline (vlib_main_t * vm,
1992 vlib_node_runtime_t * node,
1993 vlib_frame_t * frame,
1994 int do_counters, int is_midchain, int is_mcast)
1996 vnet_main_t *vnm = vnet_get_main ();
1997 if (PREDICT_FALSE (vnm->interface_main.gso_interface_count > 0))
1998 return ip6_rewrite_inline_with_gso (vm, node, frame, do_counters,
1999 is_midchain, is_mcast,
2002 return ip6_rewrite_inline_with_gso (vm, node, frame, do_counters,
2003 is_midchain, is_mcast,
2004 0 /* no do_gso */ );
2007 VLIB_NODE_FN (ip6_rewrite_node) (vlib_main_t * vm,
2008 vlib_node_runtime_t * node,
2009 vlib_frame_t * frame)
2011 if (adj_are_counters_enabled ())
2012 return ip6_rewrite_inline (vm, node, frame, 1, 0, 0);
2014 return ip6_rewrite_inline (vm, node, frame, 0, 0, 0);
2017 VLIB_NODE_FN (ip6_rewrite_bcast_node) (vlib_main_t * vm,
2018 vlib_node_runtime_t * node,
2019 vlib_frame_t * frame)
2021 if (adj_are_counters_enabled ())
2022 return ip6_rewrite_inline (vm, node, frame, 1, 0, 0);
2024 return ip6_rewrite_inline (vm, node, frame, 0, 0, 0);
2027 VLIB_NODE_FN (ip6_rewrite_mcast_node) (vlib_main_t * vm,
2028 vlib_node_runtime_t * node,
2029 vlib_frame_t * frame)
2031 if (adj_are_counters_enabled ())
2032 return ip6_rewrite_inline (vm, node, frame, 1, 0, 1);
2034 return ip6_rewrite_inline (vm, node, frame, 0, 0, 1);
2037 VLIB_NODE_FN (ip6_midchain_node) (vlib_main_t * vm,
2038 vlib_node_runtime_t * node,
2039 vlib_frame_t * frame)
2041 if (adj_are_counters_enabled ())
2042 return ip6_rewrite_inline (vm, node, frame, 1, 1, 0);
2044 return ip6_rewrite_inline (vm, node, frame, 0, 1, 0);
2047 VLIB_NODE_FN (ip6_mcast_midchain_node) (vlib_main_t * vm,
2048 vlib_node_runtime_t * node,
2049 vlib_frame_t * frame)
2051 if (adj_are_counters_enabled ())
2052 return ip6_rewrite_inline (vm, node, frame, 1, 1, 1);
2054 return ip6_rewrite_inline (vm, node, frame, 0, 1, 1);
2058 VLIB_REGISTER_NODE (ip6_midchain_node) =
2060 .name = "ip6-midchain",
2061 .vector_size = sizeof (u32),
2062 .format_trace = format_ip6_forward_next_trace,
2063 .sibling_of = "ip6-rewrite",
2066 VLIB_REGISTER_NODE (ip6_rewrite_node) =
2068 .name = "ip6-rewrite",
2069 .vector_size = sizeof (u32),
2070 .format_trace = format_ip6_rewrite_trace,
2071 .n_next_nodes = IP6_REWRITE_N_NEXT,
2074 [IP6_REWRITE_NEXT_DROP] = "ip6-drop",
2075 [IP6_REWRITE_NEXT_ICMP_ERROR] = "ip6-icmp-error",
2076 [IP6_REWRITE_NEXT_FRAGMENT] = "ip6-frag",
2080 VLIB_REGISTER_NODE (ip6_rewrite_bcast_node) = {
2081 .name = "ip6-rewrite-bcast",
2082 .vector_size = sizeof (u32),
2084 .format_trace = format_ip6_rewrite_trace,
2085 .sibling_of = "ip6-rewrite",
2088 VLIB_REGISTER_NODE (ip6_rewrite_mcast_node) =
2090 .name = "ip6-rewrite-mcast",
2091 .vector_size = sizeof (u32),
2092 .format_trace = format_ip6_rewrite_trace,
2093 .sibling_of = "ip6-rewrite",
2097 VLIB_REGISTER_NODE (ip6_mcast_midchain_node) =
2099 .name = "ip6-mcast-midchain",
2100 .vector_size = sizeof (u32),
2101 .format_trace = format_ip6_rewrite_trace,
2102 .sibling_of = "ip6-rewrite",
2108 * Hop-by-Hop handling
2110 #ifndef CLIB_MARCH_VARIANT
2111 ip6_hop_by_hop_main_t ip6_hop_by_hop_main;
2112 #endif /* CLIB_MARCH_VARIANT */
2114 #define foreach_ip6_hop_by_hop_error \
2115 _(PROCESSED, "pkts with ip6 hop-by-hop options") \
2116 _(FORMAT, "incorrectly formatted hop-by-hop options") \
2117 _(UNKNOWN_OPTION, "unknown ip6 hop-by-hop options")
2122 #define _(sym,str) IP6_HOP_BY_HOP_ERROR_##sym,
2123 foreach_ip6_hop_by_hop_error
2125 IP6_HOP_BY_HOP_N_ERROR,
2126 } ip6_hop_by_hop_error_t;
2130 * Primary h-b-h handler trace support
2131 * We work pretty hard on the problem for obvious reasons
2137 u8 option_data[256];
2138 } ip6_hop_by_hop_trace_t;
2140 extern vlib_node_registration_t ip6_hop_by_hop_node;
2142 static char *ip6_hop_by_hop_error_strings[] = {
2143 #define _(sym,string) string,
2144 foreach_ip6_hop_by_hop_error
2148 #ifndef CLIB_MARCH_VARIANT
2150 format_ip6_hop_by_hop_ext_hdr (u8 * s, va_list * args)
2152 ip6_hop_by_hop_header_t *hbh0 = va_arg (*args, ip6_hop_by_hop_header_t *);
2153 int total_len = va_arg (*args, int);
2154 ip6_hop_by_hop_option_t *opt0, *limit0;
2155 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2158 s = format (s, "IP6_HOP_BY_HOP: next protocol %d len %d total %d",
2159 hbh0->protocol, (hbh0->length + 1) << 3, total_len);
2161 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2162 limit0 = (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 + total_len);
2164 while (opt0 < limit0)
2169 case 0: /* Pad, just stop */
2170 opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0 + 1);
2174 if (hm->trace[type0])
2176 s = (*hm->trace[type0]) (s, opt0);
2181 format (s, "\n unrecognized option %d length %d", type0,
2185 (ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length +
2186 sizeof (ip6_hop_by_hop_option_t));
2195 format_ip6_hop_by_hop_trace (u8 * s, va_list * args)
2197 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
2198 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
2199 ip6_hop_by_hop_trace_t *t = va_arg (*args, ip6_hop_by_hop_trace_t *);
2200 ip6_hop_by_hop_header_t *hbh0;
2201 ip6_hop_by_hop_option_t *opt0, *limit0;
2202 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2206 hbh0 = (ip6_hop_by_hop_header_t *) t->option_data;
2208 s = format (s, "IP6_HOP_BY_HOP: next index %d len %d traced %d",
2209 t->next_index, (hbh0->length + 1) << 3, t->trace_len);
2211 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2212 limit0 = (ip6_hop_by_hop_option_t *) ((u8 *) hbh0) + t->trace_len;
2214 while (opt0 < limit0)
2219 case 0: /* Pad, just stop */
2220 opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0) + 1;
2224 if (hm->trace[type0])
2226 s = (*hm->trace[type0]) (s, opt0);
2231 format (s, "\n unrecognized option %d length %d", type0,
2235 (ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length +
2236 sizeof (ip6_hop_by_hop_option_t));
2244 ip6_scan_hbh_options (vlib_buffer_t * b0,
2246 ip6_hop_by_hop_header_t * hbh0,
2247 ip6_hop_by_hop_option_t * opt0,
2248 ip6_hop_by_hop_option_t * limit0, u32 * next0)
2250 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2254 while (opt0 < limit0)
2260 opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0) + 1;
2265 if (hm->options[type0])
2267 if ((*hm->options[type0]) (b0, ip0, opt0) < 0)
2269 error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2275 /* Unrecognized mandatory option, check the two high order bits */
2276 switch (opt0->type & HBH_OPTION_TYPE_HIGH_ORDER_BITS)
2278 case HBH_OPTION_TYPE_SKIP_UNKNOWN:
2280 case HBH_OPTION_TYPE_DISCARD_UNKNOWN:
2281 error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2282 *next0 = IP_LOOKUP_NEXT_DROP;
2284 case HBH_OPTION_TYPE_DISCARD_UNKNOWN_ICMP:
2285 error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2286 *next0 = IP_LOOKUP_NEXT_ICMP_ERROR;
2287 icmp6_error_set_vnet_buffer (b0, ICMP6_parameter_problem,
2288 ICMP6_parameter_problem_unrecognized_option,
2289 (u8 *) opt0 - (u8 *) ip0);
2291 case HBH_OPTION_TYPE_DISCARD_UNKNOWN_ICMP_NOT_MCAST:
2292 error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2293 if (!ip6_address_is_multicast (&ip0->dst_address))
2295 *next0 = IP_LOOKUP_NEXT_ICMP_ERROR;
2296 icmp6_error_set_vnet_buffer (b0,
2297 ICMP6_parameter_problem,
2298 ICMP6_parameter_problem_unrecognized_option,
2299 (u8 *) opt0 - (u8 *) ip0);
2303 *next0 = IP_LOOKUP_NEXT_DROP;
2311 (ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length +
2312 sizeof (ip6_hop_by_hop_option_t));
2318 * Process the Hop-by-Hop Options header
2320 VLIB_NODE_FN (ip6_hop_by_hop_node) (vlib_main_t * vm,
2321 vlib_node_runtime_t * node,
2322 vlib_frame_t * frame)
2324 vlib_node_runtime_t *error_node =
2325 vlib_node_get_runtime (vm, ip6_hop_by_hop_node.index);
2326 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2327 u32 n_left_from, *from, *to_next;
2328 ip_lookup_next_t next_index;
2330 from = vlib_frame_vector_args (frame);
2331 n_left_from = frame->n_vectors;
2332 next_index = node->cached_next_index;
2334 while (n_left_from > 0)
2338 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
2340 while (n_left_from >= 4 && n_left_to_next >= 2)
2343 vlib_buffer_t *b0, *b1;
2345 ip6_header_t *ip0, *ip1;
2346 ip6_hop_by_hop_header_t *hbh0, *hbh1;
2347 ip6_hop_by_hop_option_t *opt0, *limit0, *opt1, *limit1;
2348 u8 error0 = 0, error1 = 0;
2350 /* Prefetch next iteration. */
2352 vlib_buffer_t *p2, *p3;
2354 p2 = vlib_get_buffer (vm, from[2]);
2355 p3 = vlib_get_buffer (vm, from[3]);
2357 vlib_prefetch_buffer_header (p2, LOAD);
2358 vlib_prefetch_buffer_header (p3, LOAD);
2360 CLIB_PREFETCH (p2->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
2361 CLIB_PREFETCH (p3->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
2364 /* Speculatively enqueue b0, b1 to the current next frame */
2365 to_next[0] = bi0 = from[0];
2366 to_next[1] = bi1 = from[1];
2370 n_left_to_next -= 2;
2372 b0 = vlib_get_buffer (vm, bi0);
2373 b1 = vlib_get_buffer (vm, bi1);
2375 /* Default use the next_index from the adjacency. A HBH option rarely redirects to a different node */
2376 u32 adj_index0 = vnet_buffer (b0)->ip.adj_index[VLIB_TX];
2377 ip_adjacency_t *adj0 = adj_get (adj_index0);
2378 u32 adj_index1 = vnet_buffer (b1)->ip.adj_index[VLIB_TX];
2379 ip_adjacency_t *adj1 = adj_get (adj_index1);
2381 /* Default use the next_index from the adjacency. A HBH option rarely redirects to a different node */
2382 next0 = adj0->lookup_next_index;
2383 next1 = adj1->lookup_next_index;
2385 ip0 = vlib_buffer_get_current (b0);
2386 ip1 = vlib_buffer_get_current (b1);
2387 hbh0 = (ip6_hop_by_hop_header_t *) (ip0 + 1);
2388 hbh1 = (ip6_hop_by_hop_header_t *) (ip1 + 1);
2389 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2390 opt1 = (ip6_hop_by_hop_option_t *) (hbh1 + 1);
2392 (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 +
2393 ((hbh0->length + 1) << 3));
2395 (ip6_hop_by_hop_option_t *) ((u8 *) hbh1 +
2396 ((hbh1->length + 1) << 3));
2399 * Basic validity checks
2401 if ((hbh0->length + 1) << 3 >
2402 clib_net_to_host_u16 (ip0->payload_length))
2404 error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2405 next0 = IP_LOOKUP_NEXT_DROP;
2408 /* Scan the set of h-b-h options, process ones that we understand */
2409 error0 = ip6_scan_hbh_options (b0, ip0, hbh0, opt0, limit0, &next0);
2411 if ((hbh1->length + 1) << 3 >
2412 clib_net_to_host_u16 (ip1->payload_length))
2414 error1 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2415 next1 = IP_LOOKUP_NEXT_DROP;
2418 /* Scan the set of h-b-h options, process ones that we understand */
2419 error1 = ip6_scan_hbh_options (b1, ip1, hbh1, opt1, limit1, &next1);
2422 /* Has the classifier flagged this buffer for special treatment? */
2425 && (vnet_buffer (b0)->l2_classify.opaque_index & OI_DECAP)))
2426 next0 = hm->next_override;
2428 /* Has the classifier flagged this buffer for special treatment? */
2431 && (vnet_buffer (b1)->l2_classify.opaque_index & OI_DECAP)))
2432 next1 = hm->next_override;
2434 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)))
2436 if (b0->flags & VLIB_BUFFER_IS_TRACED)
2438 ip6_hop_by_hop_trace_t *t =
2439 vlib_add_trace (vm, node, b0, sizeof (*t));
2440 u32 trace_len = (hbh0->length + 1) << 3;
2441 t->next_index = next0;
2442 /* Capture the h-b-h option verbatim */
2445 ARRAY_LEN (t->option_data) ? trace_len :
2446 ARRAY_LEN (t->option_data);
2447 t->trace_len = trace_len;
2448 clib_memcpy_fast (t->option_data, hbh0, trace_len);
2450 if (b1->flags & VLIB_BUFFER_IS_TRACED)
2452 ip6_hop_by_hop_trace_t *t =
2453 vlib_add_trace (vm, node, b1, sizeof (*t));
2454 u32 trace_len = (hbh1->length + 1) << 3;
2455 t->next_index = next1;
2456 /* Capture the h-b-h option verbatim */
2459 ARRAY_LEN (t->option_data) ? trace_len :
2460 ARRAY_LEN (t->option_data);
2461 t->trace_len = trace_len;
2462 clib_memcpy_fast (t->option_data, hbh1, trace_len);
2467 b0->error = error_node->errors[error0];
2468 b1->error = error_node->errors[error1];
2470 /* verify speculative enqueue, maybe switch current next frame */
2471 vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
2472 n_left_to_next, bi0, bi1, next0,
2476 while (n_left_from > 0 && n_left_to_next > 0)
2482 ip6_hop_by_hop_header_t *hbh0;
2483 ip6_hop_by_hop_option_t *opt0, *limit0;
2486 /* Speculatively enqueue b0 to the current next frame */
2492 n_left_to_next -= 1;
2494 b0 = vlib_get_buffer (vm, bi0);
2496 * Default use the next_index from the adjacency.
2497 * A HBH option rarely redirects to a different node
2499 u32 adj_index0 = vnet_buffer (b0)->ip.adj_index[VLIB_TX];
2500 ip_adjacency_t *adj0 = adj_get (adj_index0);
2501 next0 = adj0->lookup_next_index;
2503 ip0 = vlib_buffer_get_current (b0);
2504 hbh0 = (ip6_hop_by_hop_header_t *) (ip0 + 1);
2505 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2507 (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 +
2508 ((hbh0->length + 1) << 3));
2511 * Basic validity checks
2513 if ((hbh0->length + 1) << 3 >
2514 clib_net_to_host_u16 (ip0->payload_length))
2516 error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2517 next0 = IP_LOOKUP_NEXT_DROP;
2521 /* Scan the set of h-b-h options, process ones that we understand */
2522 error0 = ip6_scan_hbh_options (b0, ip0, hbh0, opt0, limit0, &next0);
2525 /* Has the classifier flagged this buffer for special treatment? */
2528 && (vnet_buffer (b0)->l2_classify.opaque_index & OI_DECAP)))
2529 next0 = hm->next_override;
2531 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
2533 ip6_hop_by_hop_trace_t *t =
2534 vlib_add_trace (vm, node, b0, sizeof (*t));
2535 u32 trace_len = (hbh0->length + 1) << 3;
2536 t->next_index = next0;
2537 /* Capture the h-b-h option verbatim */
2540 ARRAY_LEN (t->option_data) ? trace_len :
2541 ARRAY_LEN (t->option_data);
2542 t->trace_len = trace_len;
2543 clib_memcpy_fast (t->option_data, hbh0, trace_len);
2546 b0->error = error_node->errors[error0];
2548 /* verify speculative enqueue, maybe switch current next frame */
2549 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
2550 n_left_to_next, bi0, next0);
2552 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2554 return frame->n_vectors;
2558 VLIB_REGISTER_NODE (ip6_hop_by_hop_node) =
2560 .name = "ip6-hop-by-hop",
2561 .sibling_of = "ip6-lookup",
2562 .vector_size = sizeof (u32),
2563 .format_trace = format_ip6_hop_by_hop_trace,
2564 .type = VLIB_NODE_TYPE_INTERNAL,
2565 .n_errors = ARRAY_LEN (ip6_hop_by_hop_error_strings),
2566 .error_strings = ip6_hop_by_hop_error_strings,
2571 static clib_error_t *
2572 ip6_hop_by_hop_init (vlib_main_t * vm)
2574 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2575 clib_memset (hm->options, 0, sizeof (hm->options));
2576 clib_memset (hm->trace, 0, sizeof (hm->trace));
2577 hm->next_override = IP6_LOOKUP_NEXT_POP_HOP_BY_HOP;
2581 VLIB_INIT_FUNCTION (ip6_hop_by_hop_init);
2583 #ifndef CLIB_MARCH_VARIANT
2585 ip6_hbh_set_next_override (uword next)
2587 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2589 hm->next_override = next;
2593 ip6_hbh_register_option (u8 option,
2594 int options (vlib_buffer_t * b, ip6_header_t * ip,
2595 ip6_hop_by_hop_option_t * opt),
2596 u8 * trace (u8 * s, ip6_hop_by_hop_option_t * opt))
2598 ip6_main_t *im = &ip6_main;
2599 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2601 ASSERT ((u32) option < ARRAY_LEN (hm->options));
2603 /* Already registered */
2604 if (hm->options[option])
2607 hm->options[option] = options;
2608 hm->trace[option] = trace;
2610 /* Set global variable */
2611 im->hbh_enabled = 1;
2617 ip6_hbh_unregister_option (u8 option)
2619 ip6_main_t *im = &ip6_main;
2620 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2622 ASSERT ((u32) option < ARRAY_LEN (hm->options));
2624 /* Not registered */
2625 if (!hm->options[option])
2628 hm->options[option] = NULL;
2629 hm->trace[option] = NULL;
2631 /* Disable global knob if this was the last option configured */
2634 for (i = 0; i < 256; i++)
2636 if (hm->options[option])
2643 im->hbh_enabled = 0;
2648 /* Global IP6 main. */
2649 ip6_main_t ip6_main;
2652 static clib_error_t *
2653 ip6_lookup_init (vlib_main_t * vm)
2655 ip6_main_t *im = &ip6_main;
2656 clib_error_t *error;
2659 if ((error = vlib_call_init_function (vm, vnet_feature_init)))
2662 for (i = 0; i < ARRAY_LEN (im->fib_masks); i++)
2669 for (j = 0; j < i0; j++)
2670 im->fib_masks[i].as_u32[j] = ~0;
2673 im->fib_masks[i].as_u32[i0] =
2674 clib_host_to_net_u32 (pow2_mask (i1) << (32 - i1));
2677 ip_lookup_init (&im->lookup_main, /* is_ip6 */ 1);
2679 if (im->lookup_table_nbuckets == 0)
2680 im->lookup_table_nbuckets = IP6_FIB_DEFAULT_HASH_NUM_BUCKETS;
2682 im->lookup_table_nbuckets = 1 << max_log2 (im->lookup_table_nbuckets);
2684 if (im->lookup_table_size == 0)
2685 im->lookup_table_size = IP6_FIB_DEFAULT_HASH_MEMORY_SIZE;
2687 clib_bihash_init_24_8 (&(im->ip6_table[IP6_FIB_TABLE_FWDING].ip6_hash),
2688 "ip6 FIB fwding table",
2689 im->lookup_table_nbuckets, im->lookup_table_size);
2690 clib_bihash_init_24_8 (&im->ip6_table[IP6_FIB_TABLE_NON_FWDING].ip6_hash,
2691 "ip6 FIB non-fwding table",
2692 im->lookup_table_nbuckets, im->lookup_table_size);
2693 clib_bihash_init_40_8 (&im->ip6_mtable.ip6_mhash,
2695 im->lookup_table_nbuckets, im->lookup_table_size);
2697 /* Create FIB with index 0 and table id of 0. */
2698 fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6, 0,
2699 FIB_SOURCE_DEFAULT_ROUTE);
2700 mfib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6, 0,
2701 MFIB_SOURCE_DEFAULT_ROUTE);
2705 pn = pg_get_node (ip6_lookup_node.index);
2706 pn->unformat_edit = unformat_pg_ip6_header;
2709 /* Unless explicitly configured, don't process HBH options */
2710 im->hbh_enabled = 0;
2713 icmp6_neighbor_solicitation_header_t p;
2715 clib_memset (&p, 0, sizeof (p));
2717 p.ip.ip_version_traffic_class_and_flow_label =
2718 clib_host_to_net_u32 (0x6 << 28);
2719 p.ip.payload_length =
2720 clib_host_to_net_u16 (sizeof (p) -
2722 (icmp6_neighbor_solicitation_header_t, neighbor));
2723 p.ip.protocol = IP_PROTOCOL_ICMP6;
2724 p.ip.hop_limit = 255;
2725 ip6_set_solicited_node_multicast_address (&p.ip.dst_address, 0);
2727 p.neighbor.icmp.type = ICMP6_neighbor_solicitation;
2729 p.link_layer_option.header.type =
2730 ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address;
2731 p.link_layer_option.header.n_data_u64s =
2732 sizeof (p.link_layer_option) / sizeof (u64);
2734 vlib_packet_template_init (vm,
2735 &im->discover_neighbor_packet_template,
2737 /* alloc chunk size */ 8,
2738 "ip6 neighbor discovery");
2744 VLIB_INIT_FUNCTION (ip6_lookup_init);
2746 static clib_error_t *
2747 test_ip6_link_command_fn (vlib_main_t * vm,
2748 unformat_input_t * input, vlib_cli_command_t * cmd)
2751 ip6_address_t _a, *a = &_a;
2753 if (unformat (input, "%U", unformat_ethernet_address, mac))
2755 ip6_link_local_address_from_ethernet_mac_address (a, mac);
2756 vlib_cli_output (vm, "Link local address: %U", format_ip6_address, a);
2757 ip6_ethernet_mac_address_from_link_local_address (mac, a);
2758 vlib_cli_output (vm, "Original MAC address: %U",
2759 format_ethernet_address, mac);
2766 * This command converts the given MAC Address into an IPv6 link-local
2770 * Example of how to create an IPv6 link-local address:
2771 * @cliexstart{test ip6 link 16:d9:e0:91:79:86}
2772 * Link local address: fe80::14d9:e0ff:fe91:7986
2773 * Original MAC address: 16:d9:e0:91:79:86
2777 VLIB_CLI_COMMAND (test_link_command, static) =
2779 .path = "test ip6 link",
2780 .function = test_ip6_link_command_fn,
2781 .short_help = "test ip6 link <mac-address>",
2785 #ifndef CLIB_MARCH_VARIANT
2787 vnet_set_ip6_flow_hash (u32 table_id, u32 flow_hash_config)
2791 fib_index = fib_table_find (FIB_PROTOCOL_IP6, table_id);
2793 if (~0 == fib_index)
2794 return VNET_API_ERROR_NO_SUCH_FIB;
2796 fib_table_set_flow_hash_config (fib_index, FIB_PROTOCOL_IP6,
2803 static clib_error_t *
2804 set_ip6_flow_hash_command_fn (vlib_main_t * vm,
2805 unformat_input_t * input,
2806 vlib_cli_command_t * cmd)
2810 u32 flow_hash_config = 0;
2813 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
2815 if (unformat (input, "table %d", &table_id))
2818 else if (unformat (input, #a)) { flow_hash_config |= v; matched=1;}
2819 foreach_flow_hash_bit
2826 return clib_error_return (0, "unknown input `%U'",
2827 format_unformat_error, input);
2829 rv = vnet_set_ip6_flow_hash (table_id, flow_hash_config);
2836 return clib_error_return (0, "no such FIB table %d", table_id);
2839 clib_warning ("BUG: illegal flow hash config 0x%x", flow_hash_config);
2847 * Configure the set of IPv6 fields used by the flow hash.
2851 * Example of how to set the flow hash on a given table:
2852 * @cliexcmd{set ip6 flow-hash table 8 dst sport dport proto}
2854 * Example of display the configured flow hash:
2855 * @cliexstart{show ip6 fib}
2856 * ipv6-VRF:0, fib_index 0, flow hash: src dst sport dport proto
2859 * [@0]: dpo-load-balance: [index:5 buckets:1 uRPF:5 to:[0:0]]
2860 * [0] [@0]: dpo-drop ip6
2863 * [@0]: dpo-load-balance: [index:10 buckets:1 uRPF:10 to:[0:0]]
2864 * [0] [@2]: dpo-receive
2867 * [@0]: dpo-load-balance: [index:8 buckets:1 uRPF:8 to:[0:0]]
2868 * [0] [@2]: dpo-receive
2871 * [@0]: dpo-load-balance: [index:7 buckets:1 uRPF:7 to:[0:0]]
2872 * [0] [@2]: dpo-receive
2875 * [@0]: dpo-load-balance: [index:9 buckets:1 uRPF:9 to:[0:0]]
2876 * [0] [@2]: dpo-receive
2877 * ff02::1:ff00:0/104
2879 * [@0]: dpo-load-balance: [index:6 buckets:1 uRPF:6 to:[0:0]]
2880 * [0] [@2]: dpo-receive
2881 * ipv6-VRF:8, fib_index 1, flow hash: dst sport dport proto
2884 * [@0]: dpo-load-balance: [index:21 buckets:1 uRPF:20 to:[0:0]]
2885 * [0] [@0]: dpo-drop ip6
2888 * [@0]: dpo-load-balance: [index:27 buckets:1 uRPF:26 to:[0:0]]
2889 * [0] [@4]: ipv6-glean: af_packet0
2892 * [@0]: dpo-load-balance: [index:28 buckets:1 uRPF:27 to:[0:0]]
2893 * [0] [@2]: dpo-receive: @::a:1:1:0:7 on af_packet0
2896 * [@0]: dpo-load-balance: [index:26 buckets:1 uRPF:25 to:[0:0]]
2897 * [0] [@2]: dpo-receive
2898 * fe80::fe:3eff:fe3e:9222/128
2900 * [@0]: dpo-load-balance: [index:29 buckets:1 uRPF:28 to:[0:0]]
2901 * [0] [@2]: dpo-receive: fe80::fe:3eff:fe3e:9222 on af_packet0
2904 * [@0]: dpo-load-balance: [index:24 buckets:1 uRPF:23 to:[0:0]]
2905 * [0] [@2]: dpo-receive
2908 * [@0]: dpo-load-balance: [index:23 buckets:1 uRPF:22 to:[0:0]]
2909 * [0] [@2]: dpo-receive
2912 * [@0]: dpo-load-balance: [index:25 buckets:1 uRPF:24 to:[0:0]]
2913 * [0] [@2]: dpo-receive
2914 * ff02::1:ff00:0/104
2916 * [@0]: dpo-load-balance: [index:22 buckets:1 uRPF:21 to:[0:0]]
2917 * [0] [@2]: dpo-receive
2922 VLIB_CLI_COMMAND (set_ip6_flow_hash_command, static) =
2924 .path = "set ip6 flow-hash",
2926 "set ip6 flow-hash table <table-id> [src] [dst] [sport] [dport] [proto] [reverse]",
2927 .function = set_ip6_flow_hash_command_fn,
2931 static clib_error_t *
2932 show_ip6_local_command_fn (vlib_main_t * vm,
2933 unformat_input_t * input, vlib_cli_command_t * cmd)
2935 ip6_main_t *im = &ip6_main;
2936 ip_lookup_main_t *lm = &im->lookup_main;
2939 vlib_cli_output (vm, "Protocols handled by ip6_local");
2940 for (i = 0; i < ARRAY_LEN (lm->local_next_by_ip_protocol); i++)
2942 if (lm->local_next_by_ip_protocol[i] != IP_LOCAL_NEXT_PUNT)
2945 u32 node_index = vlib_get_node (vm,
2946 ip6_local_node.index)->
2947 next_nodes[lm->local_next_by_ip_protocol[i]];
2948 vlib_cli_output (vm, "%d: %U", i, format_vlib_node_name, vm,
2958 * Display the set of protocols handled by the local IPv6 stack.
2961 * Example of how to display local protocol table:
2962 * @cliexstart{show ip6 local}
2963 * Protocols handled by ip6_local
2971 VLIB_CLI_COMMAND (show_ip6_local, static) =
2973 .path = "show ip6 local",
2974 .function = show_ip6_local_command_fn,
2975 .short_help = "show ip6 local",
2979 #ifndef CLIB_MARCH_VARIANT
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);
3041 static clib_error_t *
3042 set_ip6_classify_command_fn (vlib_main_t * vm,
3043 unformat_input_t * input,
3044 vlib_cli_command_t * cmd)
3046 u32 table_index = ~0;
3047 int table_index_set = 0;
3048 u32 sw_if_index = ~0;
3051 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
3053 if (unformat (input, "table-index %d", &table_index))
3054 table_index_set = 1;
3055 else if (unformat (input, "intfc %U", unformat_vnet_sw_interface,
3056 vnet_get_main (), &sw_if_index))
3062 if (table_index_set == 0)
3063 return clib_error_return (0, "classify table-index must be specified");
3065 if (sw_if_index == ~0)
3066 return clib_error_return (0, "interface / subif must be specified");
3068 rv = vnet_set_ip6_classify_intfc (vm, sw_if_index, table_index);
3075 case VNET_API_ERROR_NO_MATCHING_INTERFACE:
3076 return clib_error_return (0, "No such interface");
3078 case VNET_API_ERROR_NO_SUCH_ENTRY:
3079 return clib_error_return (0, "No such classifier table");
3085 * Assign a classification table to an interface. The classification
3086 * table is created using the '<em>classify table</em>' and '<em>classify session</em>'
3087 * commands. Once the table is create, use this command to filter packets
3091 * Example of how to assign a classification table to an interface:
3092 * @cliexcmd{set ip6 classify intfc GigabitEthernet2/0/0 table-index 1}
3095 VLIB_CLI_COMMAND (set_ip6_classify_command, static) =
3097 .path = "set ip6 classify",
3099 "set ip6 classify intfc <interface> table-index <classify-idx>",
3100 .function = set_ip6_classify_command_fn,
3104 static clib_error_t *
3105 ip6_config (vlib_main_t * vm, unformat_input_t * input)
3107 ip6_main_t *im = &ip6_main;
3112 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
3114 if (unformat (input, "hash-buckets %d", &tmp))
3116 else if (unformat (input, "heap-size %U",
3117 unformat_memory_size, &heapsize))
3120 return clib_error_return (0, "unknown input '%U'",
3121 format_unformat_error, input);
3124 im->lookup_table_nbuckets = nbuckets;
3125 im->lookup_table_size = heapsize;
3130 VLIB_EARLY_CONFIG_FUNCTION (ip6_config, "ip6");
3133 * fd.io coding-style-patch-verification: ON
3136 * eval: (c-set-style "gnu")