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_probe_neighbor (vlib_main_t * vm, ip6_address_t * dst, u32 sw_if_index,
1440 vnet_main_t *vnm = vnet_get_main ();
1441 ip6_main_t *im = &ip6_main;
1442 icmp6_neighbor_solicitation_header_t *h;
1444 ip_interface_address_t *ia;
1445 ip_adjacency_t *adj;
1446 vnet_hw_interface_t *hi;
1447 vnet_sw_interface_t *si;
1453 si = vnet_get_sw_interface (vnm, sw_if_index);
1455 if (!(si->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP))
1457 return clib_error_return (0, "%U: interface %U down",
1458 format_ip6_address, dst,
1459 format_vnet_sw_if_index_name, vnm,
1464 ip6_interface_address_matching_destination (im, dst, sw_if_index, &ia);
1467 vnm->api_errno = VNET_API_ERROR_NO_MATCHING_INTERFACE;
1468 return clib_error_return
1469 (0, "no matching interface address for destination %U (interface %U)",
1470 format_ip6_address, dst,
1471 format_vnet_sw_if_index_name, vnm, sw_if_index);
1475 vlib_packet_template_get_packet (vm,
1476 &im->discover_neighbor_packet_template,
1479 return clib_error_return (0, "ICMP6 NS packet allocation failed");
1481 hi = vnet_get_sup_hw_interface (vnm, sw_if_index);
1483 /* Destination address is a solicited node multicast address. We need to fill in
1484 the low 24 bits with low 24 bits of target's address. */
1485 h->ip.dst_address.as_u8[13] = dst->as_u8[13];
1486 h->ip.dst_address.as_u8[14] = dst->as_u8[14];
1487 h->ip.dst_address.as_u8[15] = dst->as_u8[15];
1489 h->ip.src_address = src[0];
1490 h->neighbor.target_address = dst[0];
1492 if (PREDICT_FALSE (!hi->hw_address))
1494 return clib_error_return (0, "%U: interface %U do not support ip probe",
1495 format_ip6_address, dst,
1496 format_vnet_sw_if_index_name, vnm,
1500 clib_memcpy_fast (h->link_layer_option.ethernet_address, hi->hw_address,
1501 vec_len (hi->hw_address));
1503 h->neighbor.icmp.checksum =
1504 ip6_tcp_udp_icmp_compute_checksum (vm, 0, &h->ip, &bogus_length);
1505 ASSERT (bogus_length == 0);
1507 b = vlib_get_buffer (vm, bi);
1508 vnet_buffer (b)->sw_if_index[VLIB_RX] =
1509 vnet_buffer (b)->sw_if_index[VLIB_TX] = sw_if_index;
1511 /* Add encapsulation string for software interface (e.g. ethernet header). */
1512 ip46_address_t nh = {
1516 ai = adj_nbr_add_or_lock (FIB_PROTOCOL_IP6,
1517 VNET_LINK_IP6, &nh, sw_if_index);
1520 /* Peer has been previously resolved, retrieve glean adj instead */
1521 if (adj->lookup_next_index == IP_LOOKUP_NEXT_REWRITE && refresh == 0)
1524 ai = adj_glean_add_or_lock (FIB_PROTOCOL_IP6,
1525 VNET_LINK_IP6, sw_if_index, &nh);
1529 vnet_rewrite_one_header (adj[0], h, sizeof (ethernet_header_t));
1530 vlib_buffer_advance (b, -adj->rewrite_header.data_bytes);
1533 vlib_frame_t *f = vlib_get_frame_to_node (vm, hi->output_node_index);
1534 u32 *to_next = vlib_frame_vector_args (f);
1537 vlib_put_frame_to_node (vm, hi->output_node_index, f);
1541 return /* no error */ 0;
1547 IP6_REWRITE_NEXT_DROP,
1548 IP6_REWRITE_NEXT_ICMP_ERROR,
1549 IP6_REWRITE_NEXT_FRAGMENT,
1550 IP6_REWRITE_N_NEXT /* Last */
1551 } ip6_rewrite_next_t;
1554 * This bits of an IPv6 address to mask to construct a multicast
1557 #define IP6_MCAST_ADDR_MASK 0xffffffff
1560 ip6_mtu_check (vlib_buffer_t * b, u16 packet_bytes,
1561 u16 adj_packet_bytes, bool is_locally_generated,
1562 u32 * next, u32 * error)
1564 if (adj_packet_bytes >= 1280 && packet_bytes > adj_packet_bytes)
1566 if (is_locally_generated)
1568 /* IP fragmentation */
1569 ip_frag_set_vnet_buffer (b, adj_packet_bytes,
1570 IP6_FRAG_NEXT_IP6_REWRITE, 0);
1571 *next = IP6_REWRITE_NEXT_FRAGMENT;
1572 *error = IP6_ERROR_MTU_EXCEEDED;
1576 *error = IP6_ERROR_MTU_EXCEEDED;
1577 icmp6_error_set_vnet_buffer (b, ICMP6_packet_too_big, 0,
1579 *next = IP6_REWRITE_NEXT_ICMP_ERROR;
1585 ip6_rewrite_inline_with_gso (vlib_main_t * vm,
1586 vlib_node_runtime_t * node,
1587 vlib_frame_t * frame,
1588 int do_counters, int is_midchain, int is_mcast,
1591 ip_lookup_main_t *lm = &ip6_main.lookup_main;
1592 u32 *from = vlib_frame_vector_args (frame);
1593 u32 n_left_from, n_left_to_next, *to_next, next_index;
1594 vlib_node_runtime_t *error_node =
1595 vlib_node_get_runtime (vm, ip6_input_node.index);
1597 n_left_from = frame->n_vectors;
1598 next_index = node->cached_next_index;
1599 u32 thread_index = vm->thread_index;
1601 while (n_left_from > 0)
1603 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1605 while (n_left_from >= 4 && n_left_to_next >= 2)
1607 ip_adjacency_t *adj0, *adj1;
1608 vlib_buffer_t *p0, *p1;
1609 ip6_header_t *ip0, *ip1;
1610 u32 pi0, rw_len0, next0, error0, adj_index0;
1611 u32 pi1, rw_len1, next1, error1, adj_index1;
1612 u32 tx_sw_if_index0, tx_sw_if_index1;
1613 bool is_locally_originated0, is_locally_originated1;
1615 /* Prefetch next iteration. */
1617 vlib_buffer_t *p2, *p3;
1619 p2 = vlib_get_buffer (vm, from[2]);
1620 p3 = vlib_get_buffer (vm, from[3]);
1622 vlib_prefetch_buffer_header (p2, LOAD);
1623 vlib_prefetch_buffer_header (p3, LOAD);
1625 CLIB_PREFETCH (p2->pre_data, 32, STORE);
1626 CLIB_PREFETCH (p3->pre_data, 32, STORE);
1628 CLIB_PREFETCH (p2->data, sizeof (ip0[0]), STORE);
1629 CLIB_PREFETCH (p3->data, sizeof (ip0[0]), STORE);
1632 pi0 = to_next[0] = from[0];
1633 pi1 = to_next[1] = from[1];
1638 n_left_to_next -= 2;
1640 p0 = vlib_get_buffer (vm, pi0);
1641 p1 = vlib_get_buffer (vm, pi1);
1643 adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
1644 adj_index1 = vnet_buffer (p1)->ip.adj_index[VLIB_TX];
1646 ip0 = vlib_buffer_get_current (p0);
1647 ip1 = vlib_buffer_get_current (p1);
1649 error0 = error1 = IP6_ERROR_NONE;
1650 next0 = next1 = IP6_REWRITE_NEXT_DROP;
1652 is_locally_originated0 =
1653 p0->flags & VNET_BUFFER_F_LOCALLY_ORIGINATED;
1654 if (PREDICT_TRUE (!is_locally_originated0))
1656 i32 hop_limit0 = ip0->hop_limit;
1658 /* Input node should have reject packets with hop limit 0. */
1659 ASSERT (ip0->hop_limit > 0);
1663 ip0->hop_limit = hop_limit0;
1666 * If the hop count drops below 1 when forwarding, generate
1669 if (PREDICT_FALSE (hop_limit0 <= 0))
1671 error0 = IP6_ERROR_TIME_EXPIRED;
1672 next0 = IP6_REWRITE_NEXT_ICMP_ERROR;
1673 vnet_buffer (p0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
1674 icmp6_error_set_vnet_buffer (p0, ICMP6_time_exceeded,
1675 ICMP6_time_exceeded_ttl_exceeded_in_transit,
1681 p0->flags &= ~VNET_BUFFER_F_LOCALLY_ORIGINATED;
1683 is_locally_originated1 =
1684 p1->flags & VNET_BUFFER_F_LOCALLY_ORIGINATED;
1685 if (PREDICT_TRUE (!is_locally_originated1))
1687 i32 hop_limit1 = ip1->hop_limit;
1689 /* Input node should have reject packets with hop limit 0. */
1690 ASSERT (ip1->hop_limit > 0);
1694 ip1->hop_limit = hop_limit1;
1697 * If the hop count drops below 1 when forwarding, generate
1700 if (PREDICT_FALSE (hop_limit1 <= 0))
1702 error1 = IP6_ERROR_TIME_EXPIRED;
1703 next1 = IP6_REWRITE_NEXT_ICMP_ERROR;
1704 vnet_buffer (p1)->sw_if_index[VLIB_TX] = (u32) ~ 0;
1705 icmp6_error_set_vnet_buffer (p1, ICMP6_time_exceeded,
1706 ICMP6_time_exceeded_ttl_exceeded_in_transit,
1712 p1->flags &= ~VNET_BUFFER_F_LOCALLY_ORIGINATED;
1714 adj0 = adj_get (adj_index0);
1715 adj1 = adj_get (adj_index1);
1717 rw_len0 = adj0[0].rewrite_header.data_bytes;
1718 rw_len1 = adj1[0].rewrite_header.data_bytes;
1719 vnet_buffer (p0)->ip.save_rewrite_length = rw_len0;
1720 vnet_buffer (p1)->ip.save_rewrite_length = rw_len1;
1724 vlib_increment_combined_counter
1725 (&adjacency_counters,
1726 thread_index, adj_index0, 1,
1727 vlib_buffer_length_in_chain (vm, p0) + rw_len0);
1728 vlib_increment_combined_counter
1729 (&adjacency_counters,
1730 thread_index, adj_index1, 1,
1731 vlib_buffer_length_in_chain (vm, p1) + rw_len1);
1734 /* Check MTU of outgoing interface. */
1736 clib_net_to_host_u16 (ip0->payload_length) +
1737 sizeof (ip6_header_t);
1739 clib_net_to_host_u16 (ip1->payload_length) +
1740 sizeof (ip6_header_t);
1741 if (do_gso && (p0->flags & VNET_BUFFER_F_GSO))
1742 ip0_len = gso_mtu_sz (p0);
1743 if (do_gso && (p1->flags & VNET_BUFFER_F_GSO))
1744 ip1_len = gso_mtu_sz (p1);
1748 ip6_mtu_check (p0, ip0_len,
1749 adj0[0].rewrite_header.max_l3_packet_bytes,
1750 is_locally_originated0, &next0, &error0);
1751 ip6_mtu_check (p1, ip1_len,
1752 adj1[0].rewrite_header.max_l3_packet_bytes,
1753 is_locally_originated1, &next1, &error1);
1755 /* Don't adjust the buffer for hop count issue; icmp-error node
1756 * wants to see the IP header */
1757 if (PREDICT_TRUE (error0 == IP6_ERROR_NONE))
1759 p0->current_data -= rw_len0;
1760 p0->current_length += rw_len0;
1762 tx_sw_if_index0 = adj0[0].rewrite_header.sw_if_index;
1763 vnet_buffer (p0)->sw_if_index[VLIB_TX] = tx_sw_if_index0;
1764 next0 = adj0[0].rewrite_header.next_index;
1767 (adj0[0].rewrite_header.flags & VNET_REWRITE_HAS_FEATURES))
1768 vnet_feature_arc_start (lm->output_feature_arc_index,
1769 tx_sw_if_index0, &next0, p0);
1773 p0->error = error_node->errors[error0];
1775 if (PREDICT_TRUE (error1 == IP6_ERROR_NONE))
1777 p1->current_data -= rw_len1;
1778 p1->current_length += rw_len1;
1780 tx_sw_if_index1 = adj1[0].rewrite_header.sw_if_index;
1781 vnet_buffer (p1)->sw_if_index[VLIB_TX] = tx_sw_if_index1;
1782 next1 = adj1[0].rewrite_header.next_index;
1785 (adj1[0].rewrite_header.flags & VNET_REWRITE_HAS_FEATURES))
1786 vnet_feature_arc_start (lm->output_feature_arc_index,
1787 tx_sw_if_index1, &next1, p1);
1791 p1->error = error_node->errors[error1];
1796 /* before we paint on the next header, update the L4
1797 * checksums if required, since there's no offload on a tunnel */
1798 calc_checksums (vm, p0);
1799 calc_checksums (vm, p1);
1802 /* Guess we are only writing on simple Ethernet header. */
1803 vnet_rewrite_two_headers (adj0[0], adj1[0],
1804 ip0, ip1, sizeof (ethernet_header_t));
1808 if (adj0->sub_type.midchain.fixup_func)
1809 adj0->sub_type.midchain.fixup_func
1810 (vm, adj0, p0, adj0->sub_type.midchain.fixup_data);
1811 if (adj1->sub_type.midchain.fixup_func)
1812 adj1->sub_type.midchain.fixup_func
1813 (vm, adj1, p1, adj1->sub_type.midchain.fixup_data);
1818 * copy bytes from the IP address into the MAC rewrite
1820 vnet_ip_mcast_fixup_header (IP6_MCAST_ADDR_MASK,
1822 rewrite_header.dst_mcast_offset,
1823 &ip0->dst_address.as_u32[3],
1825 vnet_ip_mcast_fixup_header (IP6_MCAST_ADDR_MASK,
1827 rewrite_header.dst_mcast_offset,
1828 &ip1->dst_address.as_u32[3],
1832 vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
1833 to_next, n_left_to_next,
1834 pi0, pi1, next0, next1);
1837 while (n_left_from > 0 && n_left_to_next > 0)
1839 ip_adjacency_t *adj0;
1843 u32 adj_index0, next0, error0;
1844 u32 tx_sw_if_index0;
1845 bool is_locally_originated0;
1847 pi0 = to_next[0] = from[0];
1849 p0 = vlib_get_buffer (vm, pi0);
1851 adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
1853 adj0 = adj_get (adj_index0);
1855 ip0 = vlib_buffer_get_current (p0);
1857 error0 = IP6_ERROR_NONE;
1858 next0 = IP6_REWRITE_NEXT_DROP;
1860 /* Check hop limit */
1861 is_locally_originated0 =
1862 p0->flags & VNET_BUFFER_F_LOCALLY_ORIGINATED;
1863 if (PREDICT_TRUE (!is_locally_originated0))
1865 i32 hop_limit0 = ip0->hop_limit;
1867 ASSERT (ip0->hop_limit > 0);
1871 ip0->hop_limit = hop_limit0;
1873 if (PREDICT_FALSE (hop_limit0 <= 0))
1876 * If the hop count drops below 1 when forwarding, generate
1879 error0 = IP6_ERROR_TIME_EXPIRED;
1880 next0 = IP6_REWRITE_NEXT_ICMP_ERROR;
1881 vnet_buffer (p0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
1882 icmp6_error_set_vnet_buffer (p0, ICMP6_time_exceeded,
1883 ICMP6_time_exceeded_ttl_exceeded_in_transit,
1889 p0->flags &= ~VNET_BUFFER_F_LOCALLY_ORIGINATED;
1894 calc_checksums (vm, p0);
1897 /* Guess we are only writing on simple Ethernet header. */
1898 vnet_rewrite_one_header (adj0[0], ip0, sizeof (ethernet_header_t));
1900 /* Update packet buffer attributes/set output interface. */
1901 rw_len0 = adj0[0].rewrite_header.data_bytes;
1902 vnet_buffer (p0)->ip.save_rewrite_length = rw_len0;
1906 vlib_increment_combined_counter
1907 (&adjacency_counters,
1908 thread_index, adj_index0, 1,
1909 vlib_buffer_length_in_chain (vm, p0) + rw_len0);
1912 /* Check MTU of outgoing interface. */
1914 clib_net_to_host_u16 (ip0->payload_length) +
1915 sizeof (ip6_header_t);
1916 if (do_gso && (p0->flags & VNET_BUFFER_F_GSO))
1917 ip0_len = gso_mtu_sz (p0);
1919 ip6_mtu_check (p0, ip0_len,
1920 adj0[0].rewrite_header.max_l3_packet_bytes,
1921 is_locally_originated0, &next0, &error0);
1923 /* Don't adjust the buffer for hop count issue; icmp-error node
1924 * wants to see the IP header */
1925 if (PREDICT_TRUE (error0 == IP6_ERROR_NONE))
1927 p0->current_data -= rw_len0;
1928 p0->current_length += rw_len0;
1930 tx_sw_if_index0 = adj0[0].rewrite_header.sw_if_index;
1932 vnet_buffer (p0)->sw_if_index[VLIB_TX] = tx_sw_if_index0;
1933 next0 = adj0[0].rewrite_header.next_index;
1936 (adj0[0].rewrite_header.flags & VNET_REWRITE_HAS_FEATURES))
1937 vnet_feature_arc_start (lm->output_feature_arc_index,
1938 tx_sw_if_index0, &next0, p0);
1942 p0->error = error_node->errors[error0];
1947 if (adj0->sub_type.midchain.fixup_func)
1948 adj0->sub_type.midchain.fixup_func
1949 (vm, adj0, p0, adj0->sub_type.midchain.fixup_data);
1953 vnet_ip_mcast_fixup_header (IP6_MCAST_ADDR_MASK,
1955 rewrite_header.dst_mcast_offset,
1956 &ip0->dst_address.as_u32[3],
1963 n_left_to_next -= 1;
1965 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1966 to_next, n_left_to_next,
1970 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1973 /* Need to do trace after rewrites to pick up new packet data. */
1974 if (node->flags & VLIB_NODE_FLAG_TRACE)
1975 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
1977 return frame->n_vectors;
1981 ip6_rewrite_inline (vlib_main_t * vm,
1982 vlib_node_runtime_t * node,
1983 vlib_frame_t * frame,
1984 int do_counters, int is_midchain, int is_mcast)
1986 vnet_main_t *vnm = vnet_get_main ();
1987 if (PREDICT_FALSE (vnm->interface_main.gso_interface_count > 0))
1988 return ip6_rewrite_inline_with_gso (vm, node, frame, do_counters,
1989 is_midchain, is_mcast,
1992 return ip6_rewrite_inline_with_gso (vm, node, frame, do_counters,
1993 is_midchain, is_mcast,
1994 0 /* no do_gso */ );
1997 VLIB_NODE_FN (ip6_rewrite_node) (vlib_main_t * vm,
1998 vlib_node_runtime_t * node,
1999 vlib_frame_t * frame)
2001 if (adj_are_counters_enabled ())
2002 return ip6_rewrite_inline (vm, node, frame, 1, 0, 0);
2004 return ip6_rewrite_inline (vm, node, frame, 0, 0, 0);
2007 VLIB_NODE_FN (ip6_rewrite_bcast_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_mcast_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, 1);
2024 return ip6_rewrite_inline (vm, node, frame, 0, 0, 1);
2027 VLIB_NODE_FN (ip6_midchain_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, 1, 0);
2034 return ip6_rewrite_inline (vm, node, frame, 0, 1, 0);
2037 VLIB_NODE_FN (ip6_mcast_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, 1);
2044 return ip6_rewrite_inline (vm, node, frame, 0, 1, 1);
2048 VLIB_REGISTER_NODE (ip6_midchain_node) =
2050 .name = "ip6-midchain",
2051 .vector_size = sizeof (u32),
2052 .format_trace = format_ip6_forward_next_trace,
2053 .sibling_of = "ip6-rewrite",
2056 VLIB_REGISTER_NODE (ip6_rewrite_node) =
2058 .name = "ip6-rewrite",
2059 .vector_size = sizeof (u32),
2060 .format_trace = format_ip6_rewrite_trace,
2061 .n_next_nodes = IP6_REWRITE_N_NEXT,
2064 [IP6_REWRITE_NEXT_DROP] = "ip6-drop",
2065 [IP6_REWRITE_NEXT_ICMP_ERROR] = "ip6-icmp-error",
2066 [IP6_REWRITE_NEXT_FRAGMENT] = "ip6-frag",
2070 VLIB_REGISTER_NODE (ip6_rewrite_bcast_node) = {
2071 .name = "ip6-rewrite-bcast",
2072 .vector_size = sizeof (u32),
2074 .format_trace = format_ip6_rewrite_trace,
2075 .sibling_of = "ip6-rewrite",
2078 VLIB_REGISTER_NODE (ip6_rewrite_mcast_node) =
2080 .name = "ip6-rewrite-mcast",
2081 .vector_size = sizeof (u32),
2082 .format_trace = format_ip6_rewrite_trace,
2083 .sibling_of = "ip6-rewrite",
2087 VLIB_REGISTER_NODE (ip6_mcast_midchain_node) =
2089 .name = "ip6-mcast-midchain",
2090 .vector_size = sizeof (u32),
2091 .format_trace = format_ip6_rewrite_trace,
2092 .sibling_of = "ip6-rewrite",
2098 * Hop-by-Hop handling
2100 #ifndef CLIB_MARCH_VARIANT
2101 ip6_hop_by_hop_main_t ip6_hop_by_hop_main;
2102 #endif /* CLIB_MARCH_VARIANT */
2104 #define foreach_ip6_hop_by_hop_error \
2105 _(PROCESSED, "pkts with ip6 hop-by-hop options") \
2106 _(FORMAT, "incorrectly formatted hop-by-hop options") \
2107 _(UNKNOWN_OPTION, "unknown ip6 hop-by-hop options")
2112 #define _(sym,str) IP6_HOP_BY_HOP_ERROR_##sym,
2113 foreach_ip6_hop_by_hop_error
2115 IP6_HOP_BY_HOP_N_ERROR,
2116 } ip6_hop_by_hop_error_t;
2120 * Primary h-b-h handler trace support
2121 * We work pretty hard on the problem for obvious reasons
2127 u8 option_data[256];
2128 } ip6_hop_by_hop_trace_t;
2130 extern vlib_node_registration_t ip6_hop_by_hop_node;
2132 static char *ip6_hop_by_hop_error_strings[] = {
2133 #define _(sym,string) string,
2134 foreach_ip6_hop_by_hop_error
2138 #ifndef CLIB_MARCH_VARIANT
2140 format_ip6_hop_by_hop_ext_hdr (u8 * s, va_list * args)
2142 ip6_hop_by_hop_header_t *hbh0 = va_arg (*args, ip6_hop_by_hop_header_t *);
2143 int total_len = va_arg (*args, int);
2144 ip6_hop_by_hop_option_t *opt0, *limit0;
2145 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2148 s = format (s, "IP6_HOP_BY_HOP: next protocol %d len %d total %d",
2149 hbh0->protocol, (hbh0->length + 1) << 3, total_len);
2151 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2152 limit0 = (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 + total_len);
2154 while (opt0 < limit0)
2159 case 0: /* Pad, just stop */
2160 opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0 + 1);
2164 if (hm->trace[type0])
2166 s = (*hm->trace[type0]) (s, opt0);
2171 format (s, "\n unrecognized option %d length %d", type0,
2175 (ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length +
2176 sizeof (ip6_hop_by_hop_option_t));
2185 format_ip6_hop_by_hop_trace (u8 * s, va_list * args)
2187 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
2188 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
2189 ip6_hop_by_hop_trace_t *t = va_arg (*args, ip6_hop_by_hop_trace_t *);
2190 ip6_hop_by_hop_header_t *hbh0;
2191 ip6_hop_by_hop_option_t *opt0, *limit0;
2192 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2196 hbh0 = (ip6_hop_by_hop_header_t *) t->option_data;
2198 s = format (s, "IP6_HOP_BY_HOP: next index %d len %d traced %d",
2199 t->next_index, (hbh0->length + 1) << 3, t->trace_len);
2201 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2202 limit0 = (ip6_hop_by_hop_option_t *) ((u8 *) hbh0) + t->trace_len;
2204 while (opt0 < limit0)
2209 case 0: /* Pad, just stop */
2210 opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0) + 1;
2214 if (hm->trace[type0])
2216 s = (*hm->trace[type0]) (s, opt0);
2221 format (s, "\n unrecognized option %d length %d", type0,
2225 (ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length +
2226 sizeof (ip6_hop_by_hop_option_t));
2234 ip6_scan_hbh_options (vlib_buffer_t * b0,
2236 ip6_hop_by_hop_header_t * hbh0,
2237 ip6_hop_by_hop_option_t * opt0,
2238 ip6_hop_by_hop_option_t * limit0, u32 * next0)
2240 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2244 while (opt0 < limit0)
2250 opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0) + 1;
2255 if (hm->options[type0])
2257 if ((*hm->options[type0]) (b0, ip0, opt0) < 0)
2259 error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2265 /* Unrecognized mandatory option, check the two high order bits */
2266 switch (opt0->type & HBH_OPTION_TYPE_HIGH_ORDER_BITS)
2268 case HBH_OPTION_TYPE_SKIP_UNKNOWN:
2270 case HBH_OPTION_TYPE_DISCARD_UNKNOWN:
2271 error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2272 *next0 = IP_LOOKUP_NEXT_DROP;
2274 case HBH_OPTION_TYPE_DISCARD_UNKNOWN_ICMP:
2275 error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2276 *next0 = IP_LOOKUP_NEXT_ICMP_ERROR;
2277 icmp6_error_set_vnet_buffer (b0, ICMP6_parameter_problem,
2278 ICMP6_parameter_problem_unrecognized_option,
2279 (u8 *) opt0 - (u8 *) ip0);
2281 case HBH_OPTION_TYPE_DISCARD_UNKNOWN_ICMP_NOT_MCAST:
2282 error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2283 if (!ip6_address_is_multicast (&ip0->dst_address))
2285 *next0 = IP_LOOKUP_NEXT_ICMP_ERROR;
2286 icmp6_error_set_vnet_buffer (b0,
2287 ICMP6_parameter_problem,
2288 ICMP6_parameter_problem_unrecognized_option,
2289 (u8 *) opt0 - (u8 *) ip0);
2293 *next0 = IP_LOOKUP_NEXT_DROP;
2301 (ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length +
2302 sizeof (ip6_hop_by_hop_option_t));
2308 * Process the Hop-by-Hop Options header
2310 VLIB_NODE_FN (ip6_hop_by_hop_node) (vlib_main_t * vm,
2311 vlib_node_runtime_t * node,
2312 vlib_frame_t * frame)
2314 vlib_node_runtime_t *error_node =
2315 vlib_node_get_runtime (vm, ip6_hop_by_hop_node.index);
2316 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2317 u32 n_left_from, *from, *to_next;
2318 ip_lookup_next_t next_index;
2320 from = vlib_frame_vector_args (frame);
2321 n_left_from = frame->n_vectors;
2322 next_index = node->cached_next_index;
2324 while (n_left_from > 0)
2328 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
2330 while (n_left_from >= 4 && n_left_to_next >= 2)
2333 vlib_buffer_t *b0, *b1;
2335 ip6_header_t *ip0, *ip1;
2336 ip6_hop_by_hop_header_t *hbh0, *hbh1;
2337 ip6_hop_by_hop_option_t *opt0, *limit0, *opt1, *limit1;
2338 u8 error0 = 0, error1 = 0;
2340 /* Prefetch next iteration. */
2342 vlib_buffer_t *p2, *p3;
2344 p2 = vlib_get_buffer (vm, from[2]);
2345 p3 = vlib_get_buffer (vm, from[3]);
2347 vlib_prefetch_buffer_header (p2, LOAD);
2348 vlib_prefetch_buffer_header (p3, LOAD);
2350 CLIB_PREFETCH (p2->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
2351 CLIB_PREFETCH (p3->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
2354 /* Speculatively enqueue b0, b1 to the current next frame */
2355 to_next[0] = bi0 = from[0];
2356 to_next[1] = bi1 = from[1];
2360 n_left_to_next -= 2;
2362 b0 = vlib_get_buffer (vm, bi0);
2363 b1 = vlib_get_buffer (vm, bi1);
2365 /* Default use the next_index from the adjacency. A HBH option rarely redirects to a different node */
2366 u32 adj_index0 = vnet_buffer (b0)->ip.adj_index[VLIB_TX];
2367 ip_adjacency_t *adj0 = adj_get (adj_index0);
2368 u32 adj_index1 = vnet_buffer (b1)->ip.adj_index[VLIB_TX];
2369 ip_adjacency_t *adj1 = adj_get (adj_index1);
2371 /* Default use the next_index from the adjacency. A HBH option rarely redirects to a different node */
2372 next0 = adj0->lookup_next_index;
2373 next1 = adj1->lookup_next_index;
2375 ip0 = vlib_buffer_get_current (b0);
2376 ip1 = vlib_buffer_get_current (b1);
2377 hbh0 = (ip6_hop_by_hop_header_t *) (ip0 + 1);
2378 hbh1 = (ip6_hop_by_hop_header_t *) (ip1 + 1);
2379 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2380 opt1 = (ip6_hop_by_hop_option_t *) (hbh1 + 1);
2382 (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 +
2383 ((hbh0->length + 1) << 3));
2385 (ip6_hop_by_hop_option_t *) ((u8 *) hbh1 +
2386 ((hbh1->length + 1) << 3));
2389 * Basic validity checks
2391 if ((hbh0->length + 1) << 3 >
2392 clib_net_to_host_u16 (ip0->payload_length))
2394 error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2395 next0 = IP_LOOKUP_NEXT_DROP;
2398 /* Scan the set of h-b-h options, process ones that we understand */
2399 error0 = ip6_scan_hbh_options (b0, ip0, hbh0, opt0, limit0, &next0);
2401 if ((hbh1->length + 1) << 3 >
2402 clib_net_to_host_u16 (ip1->payload_length))
2404 error1 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2405 next1 = IP_LOOKUP_NEXT_DROP;
2408 /* Scan the set of h-b-h options, process ones that we understand */
2409 error1 = ip6_scan_hbh_options (b1, ip1, hbh1, opt1, limit1, &next1);
2412 /* Has the classifier flagged this buffer for special treatment? */
2415 && (vnet_buffer (b0)->l2_classify.opaque_index & OI_DECAP)))
2416 next0 = hm->next_override;
2418 /* Has the classifier flagged this buffer for special treatment? */
2421 && (vnet_buffer (b1)->l2_classify.opaque_index & OI_DECAP)))
2422 next1 = hm->next_override;
2424 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)))
2426 if (b0->flags & VLIB_BUFFER_IS_TRACED)
2428 ip6_hop_by_hop_trace_t *t =
2429 vlib_add_trace (vm, node, b0, sizeof (*t));
2430 u32 trace_len = (hbh0->length + 1) << 3;
2431 t->next_index = next0;
2432 /* Capture the h-b-h option verbatim */
2435 ARRAY_LEN (t->option_data) ? trace_len :
2436 ARRAY_LEN (t->option_data);
2437 t->trace_len = trace_len;
2438 clib_memcpy_fast (t->option_data, hbh0, trace_len);
2440 if (b1->flags & VLIB_BUFFER_IS_TRACED)
2442 ip6_hop_by_hop_trace_t *t =
2443 vlib_add_trace (vm, node, b1, sizeof (*t));
2444 u32 trace_len = (hbh1->length + 1) << 3;
2445 t->next_index = next1;
2446 /* Capture the h-b-h option verbatim */
2449 ARRAY_LEN (t->option_data) ? trace_len :
2450 ARRAY_LEN (t->option_data);
2451 t->trace_len = trace_len;
2452 clib_memcpy_fast (t->option_data, hbh1, trace_len);
2457 b0->error = error_node->errors[error0];
2458 b1->error = error_node->errors[error1];
2460 /* verify speculative enqueue, maybe switch current next frame */
2461 vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
2462 n_left_to_next, bi0, bi1, next0,
2466 while (n_left_from > 0 && n_left_to_next > 0)
2472 ip6_hop_by_hop_header_t *hbh0;
2473 ip6_hop_by_hop_option_t *opt0, *limit0;
2476 /* Speculatively enqueue b0 to the current next frame */
2482 n_left_to_next -= 1;
2484 b0 = vlib_get_buffer (vm, bi0);
2486 * Default use the next_index from the adjacency.
2487 * A HBH option rarely redirects to a different node
2489 u32 adj_index0 = vnet_buffer (b0)->ip.adj_index[VLIB_TX];
2490 ip_adjacency_t *adj0 = adj_get (adj_index0);
2491 next0 = adj0->lookup_next_index;
2493 ip0 = vlib_buffer_get_current (b0);
2494 hbh0 = (ip6_hop_by_hop_header_t *) (ip0 + 1);
2495 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2497 (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 +
2498 ((hbh0->length + 1) << 3));
2501 * Basic validity checks
2503 if ((hbh0->length + 1) << 3 >
2504 clib_net_to_host_u16 (ip0->payload_length))
2506 error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2507 next0 = IP_LOOKUP_NEXT_DROP;
2511 /* Scan the set of h-b-h options, process ones that we understand */
2512 error0 = ip6_scan_hbh_options (b0, ip0, hbh0, opt0, limit0, &next0);
2515 /* Has the classifier flagged this buffer for special treatment? */
2518 && (vnet_buffer (b0)->l2_classify.opaque_index & OI_DECAP)))
2519 next0 = hm->next_override;
2521 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
2523 ip6_hop_by_hop_trace_t *t =
2524 vlib_add_trace (vm, node, b0, sizeof (*t));
2525 u32 trace_len = (hbh0->length + 1) << 3;
2526 t->next_index = next0;
2527 /* Capture the h-b-h option verbatim */
2530 ARRAY_LEN (t->option_data) ? trace_len :
2531 ARRAY_LEN (t->option_data);
2532 t->trace_len = trace_len;
2533 clib_memcpy_fast (t->option_data, hbh0, trace_len);
2536 b0->error = error_node->errors[error0];
2538 /* verify speculative enqueue, maybe switch current next frame */
2539 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
2540 n_left_to_next, bi0, next0);
2542 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2544 return frame->n_vectors;
2548 VLIB_REGISTER_NODE (ip6_hop_by_hop_node) =
2550 .name = "ip6-hop-by-hop",
2551 .sibling_of = "ip6-lookup",
2552 .vector_size = sizeof (u32),
2553 .format_trace = format_ip6_hop_by_hop_trace,
2554 .type = VLIB_NODE_TYPE_INTERNAL,
2555 .n_errors = ARRAY_LEN (ip6_hop_by_hop_error_strings),
2556 .error_strings = ip6_hop_by_hop_error_strings,
2561 static clib_error_t *
2562 ip6_hop_by_hop_init (vlib_main_t * vm)
2564 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2565 clib_memset (hm->options, 0, sizeof (hm->options));
2566 clib_memset (hm->trace, 0, sizeof (hm->trace));
2567 hm->next_override = IP6_LOOKUP_NEXT_POP_HOP_BY_HOP;
2571 VLIB_INIT_FUNCTION (ip6_hop_by_hop_init);
2573 #ifndef CLIB_MARCH_VARIANT
2575 ip6_hbh_set_next_override (uword next)
2577 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2579 hm->next_override = next;
2583 ip6_hbh_register_option (u8 option,
2584 int options (vlib_buffer_t * b, ip6_header_t * ip,
2585 ip6_hop_by_hop_option_t * opt),
2586 u8 * trace (u8 * s, ip6_hop_by_hop_option_t * opt))
2588 ip6_main_t *im = &ip6_main;
2589 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2591 ASSERT ((u32) option < ARRAY_LEN (hm->options));
2593 /* Already registered */
2594 if (hm->options[option])
2597 hm->options[option] = options;
2598 hm->trace[option] = trace;
2600 /* Set global variable */
2601 im->hbh_enabled = 1;
2607 ip6_hbh_unregister_option (u8 option)
2609 ip6_main_t *im = &ip6_main;
2610 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2612 ASSERT ((u32) option < ARRAY_LEN (hm->options));
2614 /* Not registered */
2615 if (!hm->options[option])
2618 hm->options[option] = NULL;
2619 hm->trace[option] = NULL;
2621 /* Disable global knob if this was the last option configured */
2624 for (i = 0; i < 256; i++)
2626 if (hm->options[option])
2633 im->hbh_enabled = 0;
2638 /* Global IP6 main. */
2639 ip6_main_t ip6_main;
2642 static clib_error_t *
2643 ip6_lookup_init (vlib_main_t * vm)
2645 ip6_main_t *im = &ip6_main;
2646 clib_error_t *error;
2649 if ((error = vlib_call_init_function (vm, vnet_feature_init)))
2652 for (i = 0; i < ARRAY_LEN (im->fib_masks); i++)
2659 for (j = 0; j < i0; j++)
2660 im->fib_masks[i].as_u32[j] = ~0;
2663 im->fib_masks[i].as_u32[i0] =
2664 clib_host_to_net_u32 (pow2_mask (i1) << (32 - i1));
2667 ip_lookup_init (&im->lookup_main, /* is_ip6 */ 1);
2669 if (im->lookup_table_nbuckets == 0)
2670 im->lookup_table_nbuckets = IP6_FIB_DEFAULT_HASH_NUM_BUCKETS;
2672 im->lookup_table_nbuckets = 1 << max_log2 (im->lookup_table_nbuckets);
2674 if (im->lookup_table_size == 0)
2675 im->lookup_table_size = IP6_FIB_DEFAULT_HASH_MEMORY_SIZE;
2677 clib_bihash_init_24_8 (&(im->ip6_table[IP6_FIB_TABLE_FWDING].ip6_hash),
2678 "ip6 FIB fwding table",
2679 im->lookup_table_nbuckets, im->lookup_table_size);
2680 clib_bihash_init_24_8 (&im->ip6_table[IP6_FIB_TABLE_NON_FWDING].ip6_hash,
2681 "ip6 FIB non-fwding table",
2682 im->lookup_table_nbuckets, im->lookup_table_size);
2683 clib_bihash_init_40_8 (&im->ip6_mtable.ip6_mhash,
2685 im->lookup_table_nbuckets, im->lookup_table_size);
2687 /* Create FIB with index 0 and table id of 0. */
2688 fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6, 0,
2689 FIB_SOURCE_DEFAULT_ROUTE);
2690 mfib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6, 0,
2691 MFIB_SOURCE_DEFAULT_ROUTE);
2695 pn = pg_get_node (ip6_lookup_node.index);
2696 pn->unformat_edit = unformat_pg_ip6_header;
2699 /* Unless explicitly configured, don't process HBH options */
2700 im->hbh_enabled = 0;
2703 icmp6_neighbor_solicitation_header_t p;
2705 clib_memset (&p, 0, sizeof (p));
2707 p.ip.ip_version_traffic_class_and_flow_label =
2708 clib_host_to_net_u32 (0x6 << 28);
2709 p.ip.payload_length =
2710 clib_host_to_net_u16 (sizeof (p) -
2712 (icmp6_neighbor_solicitation_header_t, neighbor));
2713 p.ip.protocol = IP_PROTOCOL_ICMP6;
2714 p.ip.hop_limit = 255;
2715 ip6_set_solicited_node_multicast_address (&p.ip.dst_address, 0);
2717 p.neighbor.icmp.type = ICMP6_neighbor_solicitation;
2719 p.link_layer_option.header.type =
2720 ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address;
2721 p.link_layer_option.header.n_data_u64s =
2722 sizeof (p.link_layer_option) / sizeof (u64);
2724 vlib_packet_template_init (vm,
2725 &im->discover_neighbor_packet_template,
2727 /* alloc chunk size */ 8,
2728 "ip6 neighbor discovery");
2734 VLIB_INIT_FUNCTION (ip6_lookup_init);
2736 static clib_error_t *
2737 test_ip6_link_command_fn (vlib_main_t * vm,
2738 unformat_input_t * input, vlib_cli_command_t * cmd)
2741 ip6_address_t _a, *a = &_a;
2743 if (unformat (input, "%U", unformat_ethernet_address, mac))
2745 ip6_link_local_address_from_ethernet_mac_address (a, mac);
2746 vlib_cli_output (vm, "Link local address: %U", format_ip6_address, a);
2747 ip6_ethernet_mac_address_from_link_local_address (mac, a);
2748 vlib_cli_output (vm, "Original MAC address: %U",
2749 format_ethernet_address, mac);
2756 * This command converts the given MAC Address into an IPv6 link-local
2760 * Example of how to create an IPv6 link-local address:
2761 * @cliexstart{test ip6 link 16:d9:e0:91:79:86}
2762 * Link local address: fe80::14d9:e0ff:fe91:7986
2763 * Original MAC address: 16:d9:e0:91:79:86
2767 VLIB_CLI_COMMAND (test_link_command, static) =
2769 .path = "test ip6 link",
2770 .function = test_ip6_link_command_fn,
2771 .short_help = "test ip6 link <mac-address>",
2775 #ifndef CLIB_MARCH_VARIANT
2777 vnet_set_ip6_flow_hash (u32 table_id, u32 flow_hash_config)
2781 fib_index = fib_table_find (FIB_PROTOCOL_IP6, table_id);
2783 if (~0 == fib_index)
2784 return VNET_API_ERROR_NO_SUCH_FIB;
2786 fib_table_set_flow_hash_config (fib_index, FIB_PROTOCOL_IP6,
2793 static clib_error_t *
2794 set_ip6_flow_hash_command_fn (vlib_main_t * vm,
2795 unformat_input_t * input,
2796 vlib_cli_command_t * cmd)
2800 u32 flow_hash_config = 0;
2803 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
2805 if (unformat (input, "table %d", &table_id))
2808 else if (unformat (input, #a)) { flow_hash_config |= v; matched=1;}
2809 foreach_flow_hash_bit
2816 return clib_error_return (0, "unknown input `%U'",
2817 format_unformat_error, input);
2819 rv = vnet_set_ip6_flow_hash (table_id, flow_hash_config);
2826 return clib_error_return (0, "no such FIB table %d", table_id);
2829 clib_warning ("BUG: illegal flow hash config 0x%x", flow_hash_config);
2837 * Configure the set of IPv6 fields used by the flow hash.
2841 * Example of how to set the flow hash on a given table:
2842 * @cliexcmd{set ip6 flow-hash table 8 dst sport dport proto}
2844 * Example of display the configured flow hash:
2845 * @cliexstart{show ip6 fib}
2846 * ipv6-VRF:0, fib_index 0, flow hash: src dst sport dport proto
2849 * [@0]: dpo-load-balance: [index:5 buckets:1 uRPF:5 to:[0:0]]
2850 * [0] [@0]: dpo-drop ip6
2853 * [@0]: dpo-load-balance: [index:10 buckets:1 uRPF:10 to:[0:0]]
2854 * [0] [@2]: dpo-receive
2857 * [@0]: dpo-load-balance: [index:8 buckets:1 uRPF:8 to:[0:0]]
2858 * [0] [@2]: dpo-receive
2861 * [@0]: dpo-load-balance: [index:7 buckets:1 uRPF:7 to:[0:0]]
2862 * [0] [@2]: dpo-receive
2865 * [@0]: dpo-load-balance: [index:9 buckets:1 uRPF:9 to:[0:0]]
2866 * [0] [@2]: dpo-receive
2867 * ff02::1:ff00:0/104
2869 * [@0]: dpo-load-balance: [index:6 buckets:1 uRPF:6 to:[0:0]]
2870 * [0] [@2]: dpo-receive
2871 * ipv6-VRF:8, fib_index 1, flow hash: dst sport dport proto
2874 * [@0]: dpo-load-balance: [index:21 buckets:1 uRPF:20 to:[0:0]]
2875 * [0] [@0]: dpo-drop ip6
2878 * [@0]: dpo-load-balance: [index:27 buckets:1 uRPF:26 to:[0:0]]
2879 * [0] [@4]: ipv6-glean: af_packet0
2882 * [@0]: dpo-load-balance: [index:28 buckets:1 uRPF:27 to:[0:0]]
2883 * [0] [@2]: dpo-receive: @::a:1:1:0:7 on af_packet0
2886 * [@0]: dpo-load-balance: [index:26 buckets:1 uRPF:25 to:[0:0]]
2887 * [0] [@2]: dpo-receive
2888 * fe80::fe:3eff:fe3e:9222/128
2890 * [@0]: dpo-load-balance: [index:29 buckets:1 uRPF:28 to:[0:0]]
2891 * [0] [@2]: dpo-receive: fe80::fe:3eff:fe3e:9222 on af_packet0
2894 * [@0]: dpo-load-balance: [index:24 buckets:1 uRPF:23 to:[0:0]]
2895 * [0] [@2]: dpo-receive
2898 * [@0]: dpo-load-balance: [index:23 buckets:1 uRPF:22 to:[0:0]]
2899 * [0] [@2]: dpo-receive
2902 * [@0]: dpo-load-balance: [index:25 buckets:1 uRPF:24 to:[0:0]]
2903 * [0] [@2]: dpo-receive
2904 * ff02::1:ff00:0/104
2906 * [@0]: dpo-load-balance: [index:22 buckets:1 uRPF:21 to:[0:0]]
2907 * [0] [@2]: dpo-receive
2912 VLIB_CLI_COMMAND (set_ip6_flow_hash_command, static) =
2914 .path = "set ip6 flow-hash",
2916 "set ip6 flow-hash table <table-id> [src] [dst] [sport] [dport] [proto] [reverse]",
2917 .function = set_ip6_flow_hash_command_fn,
2921 static clib_error_t *
2922 show_ip6_local_command_fn (vlib_main_t * vm,
2923 unformat_input_t * input, vlib_cli_command_t * cmd)
2925 ip6_main_t *im = &ip6_main;
2926 ip_lookup_main_t *lm = &im->lookup_main;
2929 vlib_cli_output (vm, "Protocols handled by ip6_local");
2930 for (i = 0; i < ARRAY_LEN (lm->local_next_by_ip_protocol); i++)
2932 if (lm->local_next_by_ip_protocol[i] != IP_LOCAL_NEXT_PUNT)
2935 u32 node_index = vlib_get_node (vm,
2936 ip6_local_node.index)->
2937 next_nodes[lm->local_next_by_ip_protocol[i]];
2938 vlib_cli_output (vm, "%d: %U", i, format_vlib_node_name, vm,
2948 * Display the set of protocols handled by the local IPv6 stack.
2951 * Example of how to display local protocol table:
2952 * @cliexstart{show ip6 local}
2953 * Protocols handled by ip6_local
2961 VLIB_CLI_COMMAND (show_ip6_local, static) =
2963 .path = "show ip6 local",
2964 .function = show_ip6_local_command_fn,
2965 .short_help = "show ip6 local",
2969 #ifndef CLIB_MARCH_VARIANT
2971 vnet_set_ip6_classify_intfc (vlib_main_t * vm, u32 sw_if_index,
2974 vnet_main_t *vnm = vnet_get_main ();
2975 vnet_interface_main_t *im = &vnm->interface_main;
2976 ip6_main_t *ipm = &ip6_main;
2977 ip_lookup_main_t *lm = &ipm->lookup_main;
2978 vnet_classify_main_t *cm = &vnet_classify_main;
2979 ip6_address_t *if_addr;
2981 if (pool_is_free_index (im->sw_interfaces, sw_if_index))
2982 return VNET_API_ERROR_NO_MATCHING_INTERFACE;
2984 if (table_index != ~0 && pool_is_free_index (cm->tables, table_index))
2985 return VNET_API_ERROR_NO_SUCH_ENTRY;
2987 vec_validate (lm->classify_table_index_by_sw_if_index, sw_if_index);
2988 lm->classify_table_index_by_sw_if_index[sw_if_index] = table_index;
2990 if_addr = ip6_interface_first_address (ipm, sw_if_index);
2992 if (NULL != if_addr)
2994 fib_prefix_t pfx = {
2996 .fp_proto = FIB_PROTOCOL_IP6,
2997 .fp_addr.ip6 = *if_addr,
3001 fib_index = fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4,
3005 if (table_index != (u32) ~ 0)
3007 dpo_id_t dpo = DPO_INVALID;
3012 classify_dpo_create (DPO_PROTO_IP6, table_index));
3014 fib_table_entry_special_dpo_add (fib_index,
3016 FIB_SOURCE_CLASSIFY,
3017 FIB_ENTRY_FLAG_NONE, &dpo);
3022 fib_table_entry_special_remove (fib_index,
3023 &pfx, FIB_SOURCE_CLASSIFY);
3031 static clib_error_t *
3032 set_ip6_classify_command_fn (vlib_main_t * vm,
3033 unformat_input_t * input,
3034 vlib_cli_command_t * cmd)
3036 u32 table_index = ~0;
3037 int table_index_set = 0;
3038 u32 sw_if_index = ~0;
3041 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
3043 if (unformat (input, "table-index %d", &table_index))
3044 table_index_set = 1;
3045 else if (unformat (input, "intfc %U", unformat_vnet_sw_interface,
3046 vnet_get_main (), &sw_if_index))
3052 if (table_index_set == 0)
3053 return clib_error_return (0, "classify table-index must be specified");
3055 if (sw_if_index == ~0)
3056 return clib_error_return (0, "interface / subif must be specified");
3058 rv = vnet_set_ip6_classify_intfc (vm, sw_if_index, table_index);
3065 case VNET_API_ERROR_NO_MATCHING_INTERFACE:
3066 return clib_error_return (0, "No such interface");
3068 case VNET_API_ERROR_NO_SUCH_ENTRY:
3069 return clib_error_return (0, "No such classifier table");
3075 * Assign a classification table to an interface. The classification
3076 * table is created using the '<em>classify table</em>' and '<em>classify session</em>'
3077 * commands. Once the table is create, use this command to filter packets
3081 * Example of how to assign a classification table to an interface:
3082 * @cliexcmd{set ip6 classify intfc GigabitEthernet2/0/0 table-index 1}
3085 VLIB_CLI_COMMAND (set_ip6_classify_command, static) =
3087 .path = "set ip6 classify",
3089 "set ip6 classify intfc <interface> table-index <classify-idx>",
3090 .function = set_ip6_classify_command_fn,
3094 static clib_error_t *
3095 ip6_config (vlib_main_t * vm, unformat_input_t * input)
3097 ip6_main_t *im = &ip6_main;
3102 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
3104 if (unformat (input, "hash-buckets %d", &tmp))
3106 else if (unformat (input, "heap-size %U",
3107 unformat_memory_size, &heapsize))
3110 return clib_error_return (0, "unknown input '%U'",
3111 format_unformat_error, input);
3114 im->lookup_table_nbuckets = nbuckets;
3115 im->lookup_table_size = heapsize;
3120 VLIB_EARLY_CONFIG_FUNCTION (ip6_config, "ip6");
3123 * fd.io coding-style-patch-verification: ON
3126 * eval: (c-set-style "gnu")