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/ip6_neighbor.h>
43 #include <vnet/ethernet/ethernet.h> /* for ethernet_header_t */
44 #include <vnet/srp/srp.h> /* for srp_hw_interface_class */
45 #include <vppinfra/cache.h>
46 #include <vnet/fib/fib_urpf_list.h> /* for FIB uRPF check */
47 #include <vnet/fib/ip6_fib.h>
48 #include <vnet/mfib/ip6_mfib.h>
49 #include <vnet/dpo/load_balance_map.h>
50 #include <vnet/dpo/classify_dpo.h>
52 #include <vppinfra/bihash_template.c>
53 #include <vnet/ip/ip6_forward.h>
55 /* Flag used by IOAM code. Classifier sets it pop-hop-by-hop checks it */
56 #define OI_DECAP 0x80000000
59 ip6_add_interface_routes (vnet_main_t * vnm, u32 sw_if_index,
60 ip6_main_t * im, u32 fib_index,
61 ip_interface_address_t * a)
63 ip_lookup_main_t *lm = &im->lookup_main;
64 ip6_address_t *address = ip_interface_address_get_address (lm, a);
66 .fp_len = a->address_length,
67 .fp_proto = FIB_PROTOCOL_IP6,
68 .fp_addr.ip6 = *address,
71 if (a->address_length < 128)
73 fib_table_entry_update_one_path (fib_index,
76 (FIB_ENTRY_FLAG_CONNECTED |
77 FIB_ENTRY_FLAG_ATTACHED),
79 /* No next-hop address */
81 /* invalid FIB index */
84 NULL, FIB_ROUTE_PATH_FLAG_NONE);
88 if (sw_if_index < vec_len (lm->classify_table_index_by_sw_if_index))
90 u32 classify_table_index =
91 lm->classify_table_index_by_sw_if_index[sw_if_index];
92 if (classify_table_index != (u32) ~ 0)
94 dpo_id_t dpo = DPO_INVALID;
99 classify_dpo_create (DPO_PROTO_IP6, classify_table_index));
101 fib_table_entry_special_dpo_add (fib_index,
104 FIB_ENTRY_FLAG_NONE, &dpo);
109 fib_table_entry_update_one_path (fib_index, &pfx,
110 FIB_SOURCE_INTERFACE,
111 (FIB_ENTRY_FLAG_CONNECTED |
112 FIB_ENTRY_FLAG_LOCAL),
116 1, NULL, FIB_ROUTE_PATH_FLAG_NONE);
120 ip6_del_interface_routes (ip6_main_t * im,
122 ip6_address_t * address, u32 address_length)
125 .fp_len = address_length,
126 .fp_proto = FIB_PROTOCOL_IP6,
127 .fp_addr.ip6 = *address,
130 if (pfx.fp_len < 128)
132 fib_table_entry_delete (fib_index, &pfx, FIB_SOURCE_INTERFACE);
137 fib_table_entry_delete (fib_index, &pfx, FIB_SOURCE_INTERFACE);
141 ip6_sw_interface_enable_disable (u32 sw_if_index, u32 is_enable)
143 ip6_main_t *im = &ip6_main;
145 vec_validate_init_empty (im->ip_enabled_by_sw_if_index, sw_if_index, 0);
148 * enable/disable only on the 1<->0 transition
152 if (1 != ++im->ip_enabled_by_sw_if_index[sw_if_index])
157 /* The ref count is 0 when an address is removed from an interface that has
158 * no address - this is not a ciritical error */
159 if (0 == im->ip_enabled_by_sw_if_index[sw_if_index] ||
160 0 != --im->ip_enabled_by_sw_if_index[sw_if_index])
164 vnet_feature_enable_disable ("ip6-unicast", "ip6-not-enabled", sw_if_index,
167 vnet_feature_enable_disable ("ip6-multicast", "ip6-not-enabled",
168 sw_if_index, !is_enable, 0, 0);
171 /* get first interface address */
173 ip6_interface_first_address (ip6_main_t * im, u32 sw_if_index)
175 ip_lookup_main_t *lm = &im->lookup_main;
176 ip_interface_address_t *ia = 0;
177 ip6_address_t *result = 0;
180 foreach_ip_interface_address (lm, ia, sw_if_index,
181 1 /* honor unnumbered */,
183 ip6_address_t * a = ip_interface_address_get_address (lm, ia);
192 ip6_add_del_interface_address (vlib_main_t * vm,
194 ip6_address_t * address,
195 u32 address_length, u32 is_del)
197 vnet_main_t *vnm = vnet_get_main ();
198 ip6_main_t *im = &ip6_main;
199 ip_lookup_main_t *lm = &im->lookup_main;
201 u32 if_address_index;
202 ip6_address_fib_t ip6_af, *addr_fib = 0;
204 /* local0 interface doesn't support IP addressing */
205 if (sw_if_index == 0)
208 clib_error_create ("local0 interface doesn't support IP addressing");
211 vec_validate (im->fib_index_by_sw_if_index, sw_if_index);
212 vec_validate (im->mfib_index_by_sw_if_index, sw_if_index);
214 ip6_addr_fib_init (&ip6_af, address,
215 vec_elt (im->fib_index_by_sw_if_index, sw_if_index));
216 vec_add1 (addr_fib, ip6_af);
221 /* When adding an address check that it does not conflict
222 with an existing address on any interface in this table. */
223 ip_interface_address_t *ia;
224 vnet_sw_interface_t *sif;
226 pool_foreach(sif, vnm->interface_main.sw_interfaces,
228 if (im->fib_index_by_sw_if_index[sw_if_index] ==
229 im->fib_index_by_sw_if_index[sif->sw_if_index])
231 foreach_ip_interface_address
232 (&im->lookup_main, ia, sif->sw_if_index,
233 0 /* honor unnumbered */ ,
236 ip_interface_address_get_address
237 (&im->lookup_main, ia);
238 if (ip6_destination_matches_route
239 (im, address, x, ia->address_length) ||
240 ip6_destination_matches_route (im,
245 vnm->api_errno = VNET_API_ERROR_DUPLICATE_IF_ADDRESS;
248 ("failed to add %U which conflicts with %U for interface %U",
249 format_ip6_address_and_length, address,
251 format_ip6_address_and_length, x,
253 format_vnet_sw_if_index_name, vnm,
263 uword elts_before = pool_elts (lm->if_address_pool);
265 error = ip_interface_address_add_del
266 (lm, sw_if_index, addr_fib, address_length, is_del, &if_address_index);
270 /* Pool did not grow: add duplicate address. */
271 if (elts_before == pool_elts (lm->if_address_pool))
275 ip6_sw_interface_enable_disable (sw_if_index, !is_del);
278 ip6_del_interface_routes (im, ip6_af.fib_index, address, address_length);
280 ip6_add_interface_routes (vnm, sw_if_index,
281 im, ip6_af.fib_index,
282 pool_elt_at_index (lm->if_address_pool,
286 ip6_add_del_interface_address_callback_t *cb;
287 vec_foreach (cb, im->add_del_interface_address_callbacks)
288 cb->function (im, cb->function_opaque, sw_if_index,
289 address, address_length, if_address_index, is_del);
298 ip6_sw_interface_admin_up_down (vnet_main_t * vnm, u32 sw_if_index, u32 flags)
300 ip6_main_t *im = &ip6_main;
301 ip_interface_address_t *ia;
303 u32 is_admin_up, fib_index;
305 /* Fill in lookup tables with default table (0). */
306 vec_validate (im->fib_index_by_sw_if_index, sw_if_index);
308 vec_validate_init_empty (im->
309 lookup_main.if_address_pool_index_by_sw_if_index,
312 is_admin_up = (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) != 0;
314 fib_index = vec_elt (im->fib_index_by_sw_if_index, sw_if_index);
317 foreach_ip_interface_address (&im->lookup_main, ia, sw_if_index,
318 0 /* honor unnumbered */,
320 a = ip_interface_address_get_address (&im->lookup_main, ia);
322 ip6_add_interface_routes (vnm, sw_if_index,
326 ip6_del_interface_routes (im, fib_index,
327 a, ia->address_length);
334 VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION (ip6_sw_interface_admin_up_down);
336 /* Built-in ip6 unicast rx feature path definition */
338 VNET_FEATURE_ARC_INIT (ip6_unicast, static) =
340 .arc_name = "ip6-unicast",
341 .start_nodes = VNET_FEATURES ("ip6-input"),
342 .arc_index_ptr = &ip6_main.lookup_main.ucast_feature_arc_index,
345 VNET_FEATURE_INIT (ip6_flow_classify, static) =
347 .arc_name = "ip6-unicast",
348 .node_name = "ip6-flow-classify",
349 .runs_before = VNET_FEATURES ("ip6-inacl"),
352 VNET_FEATURE_INIT (ip6_inacl, static) =
354 .arc_name = "ip6-unicast",
355 .node_name = "ip6-inacl",
356 .runs_before = VNET_FEATURES ("ip6-policer-classify"),
359 VNET_FEATURE_INIT (ip6_policer_classify, static) =
361 .arc_name = "ip6-unicast",
362 .node_name = "ip6-policer-classify",
363 .runs_before = VNET_FEATURES ("ipsec-input-ip6"),
366 VNET_FEATURE_INIT (ip6_ipsec, static) =
368 .arc_name = "ip6-unicast",
369 .node_name = "ipsec-input-ip6",
370 .runs_before = VNET_FEATURES ("l2tp-decap"),
373 VNET_FEATURE_INIT (ip6_l2tp, static) =
375 .arc_name = "ip6-unicast",
376 .node_name = "l2tp-decap",
377 .runs_before = VNET_FEATURES ("vpath-input-ip6"),
380 VNET_FEATURE_INIT (ip6_vpath, static) =
382 .arc_name = "ip6-unicast",
383 .node_name = "vpath-input-ip6",
384 .runs_before = VNET_FEATURES ("ip6-vxlan-bypass"),
387 VNET_FEATURE_INIT (ip6_vxlan_bypass, static) =
389 .arc_name = "ip6-unicast",
390 .node_name = "ip6-vxlan-bypass",
391 .runs_before = VNET_FEATURES ("ip6-lookup"),
394 VNET_FEATURE_INIT (ip6_not_enabled, static) =
396 .arc_name = "ip6-unicast",
397 .node_name = "ip6-not-enabled",
398 .runs_before = VNET_FEATURES ("ip6-lookup"),
401 VNET_FEATURE_INIT (ip6_lookup, static) =
403 .arc_name = "ip6-unicast",
404 .node_name = "ip6-lookup",
405 .runs_before = 0, /*last feature*/
408 /* Built-in ip6 multicast rx feature path definition (none now) */
409 VNET_FEATURE_ARC_INIT (ip6_multicast, static) =
411 .arc_name = "ip6-multicast",
412 .start_nodes = VNET_FEATURES ("ip6-input"),
413 .arc_index_ptr = &ip6_main.lookup_main.mcast_feature_arc_index,
416 VNET_FEATURE_INIT (ip6_vpath_mc, static) = {
417 .arc_name = "ip6-multicast",
418 .node_name = "vpath-input-ip6",
419 .runs_before = VNET_FEATURES ("ip6-mfib-forward-lookup"),
422 VNET_FEATURE_INIT (ip6_not_enabled_mc, static) = {
423 .arc_name = "ip6-multicast",
424 .node_name = "ip6-not-enabled",
425 .runs_before = VNET_FEATURES ("ip6-mfib-forward-lookup"),
428 VNET_FEATURE_INIT (ip6_mc_lookup, static) = {
429 .arc_name = "ip6-multicast",
430 .node_name = "ip6-mfib-forward-lookup",
431 .runs_before = 0, /* last feature */
434 /* Built-in ip4 tx feature path definition */
435 VNET_FEATURE_ARC_INIT (ip6_output, static) =
437 .arc_name = "ip6-output",
438 .start_nodes = VNET_FEATURES ("ip6-rewrite", "ip6-midchain", "ip6-dvr-dpo"),
439 .arc_index_ptr = &ip6_main.lookup_main.output_feature_arc_index,
442 VNET_FEATURE_INIT (ip6_outacl, static) = {
443 .arc_name = "ip6-output",
444 .node_name = "ip6-outacl",
445 .runs_before = VNET_FEATURES ("ipsec-output-ip6"),
448 VNET_FEATURE_INIT (ip6_ipsec_output, static) = {
449 .arc_name = "ip6-output",
450 .node_name = "ipsec-output-ip6",
451 .runs_before = VNET_FEATURES ("interface-output"),
454 VNET_FEATURE_INIT (ip6_interface_output, static) = {
455 .arc_name = "ip6-output",
456 .node_name = "interface-output",
457 .runs_before = 0, /* not before any other features */
462 ip6_sw_interface_add_del (vnet_main_t * vnm, u32 sw_if_index, u32 is_add)
464 ip6_main_t *im = &ip6_main;
466 vec_validate (im->fib_index_by_sw_if_index, sw_if_index);
467 vec_validate (im->mfib_index_by_sw_if_index, sw_if_index);
471 /* Ensure that IPv6 is disabled */
472 ip6_main_t *im6 = &ip6_main;
473 ip_lookup_main_t *lm6 = &im6->lookup_main;
474 ip_interface_address_t *ia = 0;
475 ip6_address_t *address;
476 vlib_main_t *vm = vlib_get_main ();
478 ip6_neighbor_sw_interface_add_del (vnm, sw_if_index, 0 /* is_add */ );
479 vnet_sw_interface_update_unnumbered (sw_if_index, ~0, 0);
481 foreach_ip_interface_address (lm6, ia, sw_if_index, 0,
483 address = ip_interface_address_get_address (lm6, ia);
484 ip6_add_del_interface_address(vm, sw_if_index, address, ia->address_length, 1);
487 ip6_mfib_interface_enable_disable (sw_if_index, 0);
490 vnet_feature_enable_disable ("ip6-unicast", "ip6-not-enabled", sw_if_index,
493 vnet_feature_enable_disable ("ip6-multicast", "ip6-not-enabled",
494 sw_if_index, is_add, 0, 0);
496 return /* no error */ 0;
499 VNET_SW_INTERFACE_ADD_DEL_FUNCTION (ip6_sw_interface_add_del);
502 ip6_lookup (vlib_main_t * vm,
503 vlib_node_runtime_t * node, vlib_frame_t * frame)
505 return ip6_lookup_inline (vm, node, frame);
508 static u8 *format_ip6_lookup_trace (u8 * s, va_list * args);
511 VLIB_REGISTER_NODE (ip6_lookup_node) =
513 .function = ip6_lookup,
514 .name = "ip6-lookup",
515 .vector_size = sizeof (u32),
516 .format_trace = format_ip6_lookup_trace,
517 .n_next_nodes = IP6_LOOKUP_N_NEXT,
518 .next_nodes = IP6_LOOKUP_NEXT_NODES,
522 VLIB_NODE_FUNCTION_MULTIARCH (ip6_lookup_node, ip6_lookup);
525 ip6_load_balance (vlib_main_t * vm,
526 vlib_node_runtime_t * node, vlib_frame_t * frame)
528 vlib_combined_counter_main_t *cm = &load_balance_main.lbm_via_counters;
529 u32 n_left_from, n_left_to_next, *from, *to_next;
530 ip_lookup_next_t next;
531 u32 thread_index = vlib_get_thread_index ();
532 ip6_main_t *im = &ip6_main;
534 from = vlib_frame_vector_args (frame);
535 n_left_from = frame->n_vectors;
536 next = node->cached_next_index;
538 if (node->flags & VLIB_NODE_FLAG_TRACE)
539 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
541 while (n_left_from > 0)
543 vlib_get_next_frame (vm, node, next, to_next, n_left_to_next);
546 while (n_left_from >= 4 && n_left_to_next >= 2)
548 ip_lookup_next_t next0, next1;
549 const load_balance_t *lb0, *lb1;
550 vlib_buffer_t *p0, *p1;
551 u32 pi0, lbi0, hc0, pi1, lbi1, hc1;
552 const ip6_header_t *ip0, *ip1;
553 const dpo_id_t *dpo0, *dpo1;
555 /* Prefetch next iteration. */
557 vlib_buffer_t *p2, *p3;
559 p2 = vlib_get_buffer (vm, from[2]);
560 p3 = vlib_get_buffer (vm, from[3]);
562 vlib_prefetch_buffer_header (p2, STORE);
563 vlib_prefetch_buffer_header (p3, STORE);
565 CLIB_PREFETCH (p2->data, sizeof (ip0[0]), STORE);
566 CLIB_PREFETCH (p3->data, sizeof (ip0[0]), STORE);
569 pi0 = to_next[0] = from[0];
570 pi1 = to_next[1] = from[1];
577 p0 = vlib_get_buffer (vm, pi0);
578 p1 = vlib_get_buffer (vm, pi1);
580 ip0 = vlib_buffer_get_current (p0);
581 ip1 = vlib_buffer_get_current (p1);
582 lbi0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
583 lbi1 = vnet_buffer (p1)->ip.adj_index[VLIB_TX];
585 lb0 = load_balance_get (lbi0);
586 lb1 = load_balance_get (lbi1);
589 * this node is for via FIBs we can re-use the hash value from the
590 * to node if present.
591 * We don't want to use the same hash value at each level in the recursion
592 * graph as that would lead to polarisation
596 if (PREDICT_FALSE (lb0->lb_n_buckets > 1))
598 if (PREDICT_TRUE (vnet_buffer (p0)->ip.flow_hash))
600 hc0 = vnet_buffer (p0)->ip.flow_hash =
601 vnet_buffer (p0)->ip.flow_hash >> 1;
605 hc0 = vnet_buffer (p0)->ip.flow_hash =
606 ip6_compute_flow_hash (ip0, lb0->lb_hash_config);
609 load_balance_get_fwd_bucket (lb0,
611 lb0->lb_n_buckets_minus_1));
615 dpo0 = load_balance_get_bucket_i (lb0, 0);
617 if (PREDICT_FALSE (lb1->lb_n_buckets > 1))
619 if (PREDICT_TRUE (vnet_buffer (p1)->ip.flow_hash))
621 hc1 = vnet_buffer (p1)->ip.flow_hash =
622 vnet_buffer (p1)->ip.flow_hash >> 1;
626 hc1 = vnet_buffer (p1)->ip.flow_hash =
627 ip6_compute_flow_hash (ip1, lb1->lb_hash_config);
630 load_balance_get_fwd_bucket (lb1,
632 lb1->lb_n_buckets_minus_1));
636 dpo1 = load_balance_get_bucket_i (lb1, 0);
639 next0 = dpo0->dpoi_next_node;
640 next1 = dpo1->dpoi_next_node;
642 /* Only process the HBH Option Header if explicitly configured to do so */
644 (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
646 next0 = (dpo_is_adj (dpo0) && im->hbh_enabled) ?
647 (ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next0;
649 /* Only process the HBH Option Header if explicitly configured to do so */
651 (ip1->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
653 next1 = (dpo_is_adj (dpo1) && im->hbh_enabled) ?
654 (ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next1;
657 vnet_buffer (p0)->ip.adj_index[VLIB_TX] = dpo0->dpoi_index;
658 vnet_buffer (p1)->ip.adj_index[VLIB_TX] = dpo1->dpoi_index;
660 vlib_increment_combined_counter
661 (cm, thread_index, lbi0, 1, vlib_buffer_length_in_chain (vm, p0));
662 vlib_increment_combined_counter
663 (cm, thread_index, lbi1, 1, vlib_buffer_length_in_chain (vm, p1));
665 vlib_validate_buffer_enqueue_x2 (vm, node, next,
666 to_next, n_left_to_next,
667 pi0, pi1, next0, next1);
670 while (n_left_from > 0 && n_left_to_next > 0)
672 ip_lookup_next_t next0;
673 const load_balance_t *lb0;
676 const ip6_header_t *ip0;
677 const dpo_id_t *dpo0;
686 p0 = vlib_get_buffer (vm, pi0);
688 ip0 = vlib_buffer_get_current (p0);
689 lbi0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
691 lb0 = load_balance_get (lbi0);
694 if (PREDICT_FALSE (lb0->lb_n_buckets > 1))
696 if (PREDICT_TRUE (vnet_buffer (p0)->ip.flow_hash))
698 hc0 = vnet_buffer (p0)->ip.flow_hash =
699 vnet_buffer (p0)->ip.flow_hash >> 1;
703 hc0 = vnet_buffer (p0)->ip.flow_hash =
704 ip6_compute_flow_hash (ip0, lb0->lb_hash_config);
707 load_balance_get_fwd_bucket (lb0,
709 lb0->lb_n_buckets_minus_1));
713 dpo0 = load_balance_get_bucket_i (lb0, 0);
716 next0 = dpo0->dpoi_next_node;
717 vnet_buffer (p0)->ip.adj_index[VLIB_TX] = dpo0->dpoi_index;
719 /* Only process the HBH Option Header if explicitly configured to do so */
721 (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
723 next0 = (dpo_is_adj (dpo0) && im->hbh_enabled) ?
724 (ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next0;
727 vlib_increment_combined_counter
728 (cm, thread_index, lbi0, 1, vlib_buffer_length_in_chain (vm, p0));
730 vlib_validate_buffer_enqueue_x1 (vm, node, next,
731 to_next, n_left_to_next,
735 vlib_put_next_frame (vm, node, next, n_left_to_next);
738 return frame->n_vectors;
742 VLIB_REGISTER_NODE (ip6_load_balance_node) =
744 .function = ip6_load_balance,
745 .name = "ip6-load-balance",
746 .vector_size = sizeof (u32),
747 .sibling_of = "ip6-lookup",
748 .format_trace = format_ip6_lookup_trace,
752 VLIB_NODE_FUNCTION_MULTIARCH (ip6_load_balance_node, ip6_load_balance);
756 /* Adjacency taken. */
761 /* Packet data, possibly *after* rewrite. */
762 u8 packet_data[128 - 1 * sizeof (u32)];
764 ip6_forward_next_trace_t;
767 format_ip6_forward_next_trace (u8 * s, va_list * args)
769 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
770 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
771 ip6_forward_next_trace_t *t = va_arg (*args, ip6_forward_next_trace_t *);
772 u32 indent = format_get_indent (s);
774 s = format (s, "%U%U",
775 format_white_space, indent,
776 format_ip6_header, t->packet_data, sizeof (t->packet_data));
781 format_ip6_lookup_trace (u8 * s, va_list * args)
783 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
784 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
785 ip6_forward_next_trace_t *t = va_arg (*args, ip6_forward_next_trace_t *);
786 u32 indent = format_get_indent (s);
788 s = format (s, "fib %d dpo-idx %d flow hash: 0x%08x",
789 t->fib_index, t->adj_index, t->flow_hash);
790 s = format (s, "\n%U%U",
791 format_white_space, indent,
792 format_ip6_header, t->packet_data, sizeof (t->packet_data));
798 format_ip6_rewrite_trace (u8 * s, va_list * args)
800 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
801 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
802 ip6_forward_next_trace_t *t = va_arg (*args, ip6_forward_next_trace_t *);
803 u32 indent = format_get_indent (s);
805 s = format (s, "tx_sw_if_index %d adj-idx %d : %U flow hash: 0x%08x",
806 t->fib_index, t->adj_index, format_ip_adjacency,
807 t->adj_index, FORMAT_IP_ADJACENCY_NONE, t->flow_hash);
808 s = format (s, "\n%U%U",
809 format_white_space, indent,
810 format_ip_adjacency_packet_data,
811 t->adj_index, t->packet_data, sizeof (t->packet_data));
815 /* Common trace function for all ip6-forward next nodes. */
817 ip6_forward_next_trace (vlib_main_t * vm,
818 vlib_node_runtime_t * node,
819 vlib_frame_t * frame, vlib_rx_or_tx_t which_adj_index)
822 ip6_main_t *im = &ip6_main;
824 n_left = frame->n_vectors;
825 from = vlib_frame_vector_args (frame);
830 vlib_buffer_t *b0, *b1;
831 ip6_forward_next_trace_t *t0, *t1;
833 /* Prefetch next iteration. */
834 vlib_prefetch_buffer_with_index (vm, from[2], LOAD);
835 vlib_prefetch_buffer_with_index (vm, from[3], LOAD);
840 b0 = vlib_get_buffer (vm, bi0);
841 b1 = vlib_get_buffer (vm, bi1);
843 if (b0->flags & VLIB_BUFFER_IS_TRACED)
845 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
846 t0->adj_index = vnet_buffer (b0)->ip.adj_index[which_adj_index];
847 t0->flow_hash = vnet_buffer (b0)->ip.flow_hash;
849 (vnet_buffer (b0)->sw_if_index[VLIB_TX] !=
850 (u32) ~ 0) ? vnet_buffer (b0)->sw_if_index[VLIB_TX] :
851 vec_elt (im->fib_index_by_sw_if_index,
852 vnet_buffer (b0)->sw_if_index[VLIB_RX]);
854 clib_memcpy (t0->packet_data,
855 vlib_buffer_get_current (b0),
856 sizeof (t0->packet_data));
858 if (b1->flags & VLIB_BUFFER_IS_TRACED)
860 t1 = vlib_add_trace (vm, node, b1, sizeof (t1[0]));
861 t1->adj_index = vnet_buffer (b1)->ip.adj_index[which_adj_index];
862 t1->flow_hash = vnet_buffer (b1)->ip.flow_hash;
864 (vnet_buffer (b1)->sw_if_index[VLIB_TX] !=
865 (u32) ~ 0) ? vnet_buffer (b1)->sw_if_index[VLIB_TX] :
866 vec_elt (im->fib_index_by_sw_if_index,
867 vnet_buffer (b1)->sw_if_index[VLIB_RX]);
869 clib_memcpy (t1->packet_data,
870 vlib_buffer_get_current (b1),
871 sizeof (t1->packet_data));
881 ip6_forward_next_trace_t *t0;
885 b0 = vlib_get_buffer (vm, bi0);
887 if (b0->flags & VLIB_BUFFER_IS_TRACED)
889 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
890 t0->adj_index = vnet_buffer (b0)->ip.adj_index[which_adj_index];
891 t0->flow_hash = vnet_buffer (b0)->ip.flow_hash;
893 (vnet_buffer (b0)->sw_if_index[VLIB_TX] !=
894 (u32) ~ 0) ? vnet_buffer (b0)->sw_if_index[VLIB_TX] :
895 vec_elt (im->fib_index_by_sw_if_index,
896 vnet_buffer (b0)->sw_if_index[VLIB_RX]);
898 clib_memcpy (t0->packet_data,
899 vlib_buffer_get_current (b0),
900 sizeof (t0->packet_data));
907 /* Compute TCP/UDP/ICMP6 checksum in software. */
909 ip6_tcp_udp_icmp_compute_checksum (vlib_main_t * vm, vlib_buffer_t * p0,
910 ip6_header_t * ip0, int *bogus_lengthp)
913 u16 sum16, payload_length_host_byte_order;
914 u32 i, n_this_buffer, n_bytes_left;
915 u32 headers_size = sizeof (ip0[0]);
916 void *data_this_buffer;
918 ASSERT (bogus_lengthp);
921 /* Initialize checksum with ip header. */
922 sum0 = ip0->payload_length + clib_host_to_net_u16 (ip0->protocol);
923 payload_length_host_byte_order = clib_net_to_host_u16 (ip0->payload_length);
924 data_this_buffer = (void *) (ip0 + 1);
926 for (i = 0; i < ARRAY_LEN (ip0->src_address.as_uword); i++)
928 sum0 = ip_csum_with_carry (sum0,
929 clib_mem_unaligned (&ip0->
930 src_address.as_uword[i],
933 ip_csum_with_carry (sum0,
934 clib_mem_unaligned (&ip0->dst_address.as_uword[i],
938 /* some icmp packets may come with a "router alert" hop-by-hop extension header (e.g., mldv2 packets)
939 * or UDP-Ping packets */
940 if (PREDICT_FALSE (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
943 ip6_hop_by_hop_ext_t *ext_hdr =
944 (ip6_hop_by_hop_ext_t *) data_this_buffer;
946 /* validate really icmp6 next */
947 ASSERT ((ext_hdr->next_hdr == IP_PROTOCOL_ICMP6)
948 || (ext_hdr->next_hdr == IP_PROTOCOL_UDP));
950 skip_bytes = 8 * (1 + ext_hdr->n_data_u64s);
951 data_this_buffer = (void *) ((u8 *) data_this_buffer + skip_bytes);
953 payload_length_host_byte_order -= skip_bytes;
954 headers_size += skip_bytes;
957 n_bytes_left = n_this_buffer = payload_length_host_byte_order;
958 if (p0 && n_this_buffer + headers_size > p0->current_length)
961 headers_size ? p0->current_length - headers_size : 0;
964 sum0 = ip_incremental_checksum (sum0, data_this_buffer, n_this_buffer);
965 n_bytes_left -= n_this_buffer;
966 if (n_bytes_left == 0)
969 if (!(p0->flags & VLIB_BUFFER_NEXT_PRESENT))
974 p0 = vlib_get_buffer (vm, p0->next_buffer);
975 data_this_buffer = vlib_buffer_get_current (p0);
976 n_this_buffer = p0->current_length;
979 sum16 = ~ip_csum_fold (sum0);
985 ip6_tcp_udp_icmp_validate_checksum (vlib_main_t * vm, vlib_buffer_t * p0)
987 ip6_header_t *ip0 = vlib_buffer_get_current (p0);
992 /* some icmp packets may come with a "router alert" hop-by-hop extension header (e.g., mldv2 packets) */
993 ASSERT (ip0->protocol == IP_PROTOCOL_TCP
994 || ip0->protocol == IP_PROTOCOL_ICMP6
995 || ip0->protocol == IP_PROTOCOL_UDP
996 || ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS);
998 udp0 = (void *) (ip0 + 1);
999 if (ip0->protocol == IP_PROTOCOL_UDP && udp0->checksum == 0)
1001 p0->flags |= (VNET_BUFFER_F_L4_CHECKSUM_COMPUTED
1002 | VNET_BUFFER_F_L4_CHECKSUM_CORRECT);
1006 sum16 = ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip0, &bogus_length);
1008 p0->flags |= (VNET_BUFFER_F_L4_CHECKSUM_COMPUTED
1009 | ((sum16 == 0) << VNET_BUFFER_F_LOG2_L4_CHECKSUM_CORRECT));
1015 * @brief returns number of links on which src is reachable.
1018 ip6_urpf_loose_check (ip6_main_t * im, vlib_buffer_t * b, ip6_header_t * i)
1020 const load_balance_t *lb0;
1024 fib_index = vec_elt (im->fib_index_by_sw_if_index,
1025 vnet_buffer (b)->sw_if_index[VLIB_RX]);
1027 (vnet_buffer (b)->sw_if_index[VLIB_TX] == (u32) ~ 0) ?
1028 fib_index : vnet_buffer (b)->sw_if_index[VLIB_TX];
1030 lbi = ip6_fib_table_fwding_lookup (im, fib_index, &i->src_address);
1031 lb0 = load_balance_get (lbi);
1033 return (fib_urpf_check_size (lb0->lb_urpf));
1037 ip6_next_proto_is_tcp_udp (vlib_buffer_t * p0, ip6_header_t * ip0,
1041 proto0 = ip6_locate_header (p0, ip0, IP_PROTOCOL_UDP, udp_offset0);
1042 if (proto0 != IP_PROTOCOL_UDP)
1044 proto0 = ip6_locate_header (p0, ip0, IP_PROTOCOL_TCP, udp_offset0);
1045 proto0 = (proto0 == IP_PROTOCOL_TCP) ? proto0 : 0;
1051 VNET_FEATURE_ARC_INIT (ip6_local) =
1053 .arc_name = "ip6-local",
1054 .start_nodes = VNET_FEATURES ("ip6-local"),
1059 ip6_local_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
1060 vlib_frame_t * frame, int head_of_feature_arc)
1062 ip6_main_t *im = &ip6_main;
1063 ip_lookup_main_t *lm = &im->lookup_main;
1064 ip_local_next_t next_index;
1065 u32 *from, *to_next, n_left_from, n_left_to_next;
1066 vlib_node_runtime_t *error_node =
1067 vlib_node_get_runtime (vm, ip6_input_node.index);
1068 u8 arc_index = vnet_feat_arc_ip6_local.feature_arc_index;
1070 from = vlib_frame_vector_args (frame);
1071 n_left_from = frame->n_vectors;
1072 next_index = node->cached_next_index;
1074 if (node->flags & VLIB_NODE_FLAG_TRACE)
1075 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
1077 while (n_left_from > 0)
1079 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1081 while (n_left_from >= 4 && n_left_to_next >= 2)
1083 vlib_buffer_t *p0, *p1;
1084 ip6_header_t *ip0, *ip1;
1085 udp_header_t *udp0, *udp1;
1086 u32 pi0, ip_len0, udp_len0, flags0, next0;
1087 u32 pi1, ip_len1, udp_len1, flags1, next1;
1088 i32 len_diff0, len_diff1;
1089 u8 error0, type0, good_l4_csum0, is_tcp_udp0;
1090 u8 error1, type1, good_l4_csum1, is_tcp_udp1;
1091 u32 udp_offset0, udp_offset1;
1093 pi0 = to_next[0] = from[0];
1094 pi1 = to_next[1] = from[1];
1098 n_left_to_next -= 2;
1100 error0 = error1 = IP6_ERROR_UNKNOWN_PROTOCOL;
1102 p0 = vlib_get_buffer (vm, pi0);
1103 p1 = vlib_get_buffer (vm, pi1);
1105 ip0 = vlib_buffer_get_current (p0);
1106 ip1 = vlib_buffer_get_current (p1);
1108 if (head_of_feature_arc == 0)
1111 vnet_buffer (p0)->l3_hdr_offset = p0->current_data;
1112 vnet_buffer (p1)->l3_hdr_offset = p1->current_data;
1114 type0 = lm->builtin_protocol_by_ip_protocol[ip0->protocol];
1115 type1 = lm->builtin_protocol_by_ip_protocol[ip1->protocol];
1120 is_tcp_udp0 = ip6_next_proto_is_tcp_udp (p0, ip0, &udp_offset0);
1121 is_tcp_udp1 = ip6_next_proto_is_tcp_udp (p1, ip1, &udp_offset1);
1123 good_l4_csum0 = (flags0 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT
1124 || (flags0 & VNET_BUFFER_F_OFFLOAD_TCP_CKSUM
1125 || flags0 & VNET_BUFFER_F_OFFLOAD_UDP_CKSUM))
1127 good_l4_csum1 = (flags1 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT
1128 || (flags1 & VNET_BUFFER_F_OFFLOAD_TCP_CKSUM
1129 || flags1 & VNET_BUFFER_F_OFFLOAD_UDP_CKSUM))
1134 if (PREDICT_TRUE (is_tcp_udp0))
1136 udp0 = (udp_header_t *) ((u8 *) ip0 + udp_offset0);
1137 /* Don't verify UDP checksum for packets with explicit zero checksum. */
1138 good_l4_csum0 |= type0 == IP_BUILTIN_PROTOCOL_UDP
1139 && udp0->checksum == 0;
1140 /* Verify UDP length. */
1141 if (is_tcp_udp0 == IP_PROTOCOL_UDP)
1143 ip_len0 = clib_net_to_host_u16 (ip0->payload_length);
1144 udp_len0 = clib_net_to_host_u16 (udp0->length);
1145 len_diff0 = ip_len0 - udp_len0;
1148 if (PREDICT_TRUE (is_tcp_udp1))
1150 udp1 = (udp_header_t *) ((u8 *) ip1 + udp_offset1);
1151 /* Don't verify UDP checksum for packets with explicit zero checksum. */
1152 good_l4_csum1 |= type1 == IP_BUILTIN_PROTOCOL_UDP
1153 && udp1->checksum == 0;
1154 /* Verify UDP length. */
1155 if (is_tcp_udp1 == IP_PROTOCOL_UDP)
1157 ip_len1 = clib_net_to_host_u16 (ip1->payload_length);
1158 udp_len1 = clib_net_to_host_u16 (udp1->length);
1159 len_diff1 = ip_len1 - udp_len1;
1163 good_l4_csum0 |= type0 == IP_BUILTIN_PROTOCOL_UNKNOWN;
1164 good_l4_csum1 |= type1 == IP_BUILTIN_PROTOCOL_UNKNOWN;
1166 len_diff0 = type0 == IP_BUILTIN_PROTOCOL_UDP ? len_diff0 : 0;
1167 len_diff1 = type1 == IP_BUILTIN_PROTOCOL_UDP ? len_diff1 : 0;
1169 if (PREDICT_FALSE (type0 != IP_BUILTIN_PROTOCOL_UNKNOWN
1172 VNET_BUFFER_F_L4_CHECKSUM_COMPUTED)))
1174 flags0 = ip6_tcp_udp_icmp_validate_checksum (vm, p0);
1176 (flags0 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0;
1178 if (PREDICT_FALSE (type1 != IP_BUILTIN_PROTOCOL_UNKNOWN
1181 VNET_BUFFER_F_L4_CHECKSUM_COMPUTED)))
1183 flags1 = ip6_tcp_udp_icmp_validate_checksum (vm, p1);
1185 (flags1 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0;
1188 error0 = error1 = IP6_ERROR_UNKNOWN_PROTOCOL;
1189 error0 = len_diff0 < 0 ? IP6_ERROR_UDP_LENGTH : error0;
1190 error1 = len_diff1 < 0 ? IP6_ERROR_UDP_LENGTH : error1;
1192 ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_UDP ==
1193 IP6_ERROR_UDP_CHECKSUM);
1194 ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_ICMP ==
1195 IP6_ERROR_ICMP_CHECKSUM);
1196 error0 = (!good_l4_csum0 ? IP6_ERROR_UDP_CHECKSUM + type0 : error0);
1197 error1 = (!good_l4_csum1 ? IP6_ERROR_UDP_CHECKSUM + type1 : error1);
1199 /* Drop packets from unroutable hosts. */
1200 /* If this is a neighbor solicitation (ICMP), skip source RPF check */
1201 if (error0 == IP6_ERROR_UNKNOWN_PROTOCOL &&
1202 type0 != IP_BUILTIN_PROTOCOL_ICMP &&
1203 !ip6_address_is_link_local_unicast (&ip0->src_address))
1205 error0 = (!ip6_urpf_loose_check (im, p0, ip0)
1206 ? IP6_ERROR_SRC_LOOKUP_MISS : error0);
1208 if (error1 == IP6_ERROR_UNKNOWN_PROTOCOL &&
1209 type1 != IP_BUILTIN_PROTOCOL_ICMP &&
1210 !ip6_address_is_link_local_unicast (&ip1->src_address))
1212 error1 = (!ip6_urpf_loose_check (im, p1, ip1)
1213 ? IP6_ERROR_SRC_LOOKUP_MISS : error1);
1216 /* TODO maybe move to lookup? */
1217 vnet_buffer (p0)->ip.fib_index =
1218 vec_elt (im->fib_index_by_sw_if_index,
1219 vnet_buffer (p0)->sw_if_index[VLIB_RX]);
1220 vnet_buffer (p0)->ip.fib_index =
1221 (vnet_buffer (p0)->sw_if_index[VLIB_TX] ==
1222 (u32) ~ 0) ? vnet_buffer (p0)->ip.
1223 fib_index : vnet_buffer (p0)->sw_if_index[VLIB_TX];
1225 vnet_buffer (p1)->ip.fib_index =
1226 vec_elt (im->fib_index_by_sw_if_index,
1227 vnet_buffer (p1)->sw_if_index[VLIB_RX]);
1228 vnet_buffer (p1)->ip.fib_index =
1229 (vnet_buffer (p1)->sw_if_index[VLIB_TX] ==
1230 (u32) ~ 0) ? vnet_buffer (p1)->ip.
1231 fib_index : vnet_buffer (p1)->sw_if_index[VLIB_TX];
1236 next0 = lm->local_next_by_ip_protocol[ip0->protocol];
1237 next1 = lm->local_next_by_ip_protocol[ip1->protocol];
1240 error0 != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next0;
1242 error1 != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next1;
1244 p0->error = error_node->errors[error0];
1245 p1->error = error_node->errors[error1];
1247 if (head_of_feature_arc)
1249 if (PREDICT_TRUE (error0 == (u8) IP6_ERROR_UNKNOWN_PROTOCOL))
1250 vnet_feature_arc_start (arc_index,
1251 vnet_buffer (p0)->sw_if_index
1252 [VLIB_RX], &next0, p0);
1253 if (PREDICT_TRUE (error1 == (u8) IP6_ERROR_UNKNOWN_PROTOCOL))
1254 vnet_feature_arc_start (arc_index,
1255 vnet_buffer (p1)->sw_if_index
1256 [VLIB_RX], &next1, p1);
1259 vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
1260 to_next, n_left_to_next,
1261 pi0, pi1, next0, next1);
1264 while (n_left_from > 0 && n_left_to_next > 0)
1269 u32 pi0, ip_len0, udp_len0, flags0, next0;
1271 u8 error0, type0, good_l4_csum0;
1275 pi0 = to_next[0] = from[0];
1279 n_left_to_next -= 1;
1281 error0 = IP6_ERROR_UNKNOWN_PROTOCOL;
1283 p0 = vlib_get_buffer (vm, pi0);
1284 ip0 = vlib_buffer_get_current (p0);
1286 if (head_of_feature_arc == 0)
1289 vnet_buffer (p0)->l3_hdr_offset = p0->current_data;
1291 type0 = lm->builtin_protocol_by_ip_protocol[ip0->protocol];
1293 is_tcp_udp0 = ip6_next_proto_is_tcp_udp (p0, ip0, &udp_offset0);
1294 good_l4_csum0 = (flags0 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT
1295 || (flags0 & VNET_BUFFER_F_OFFLOAD_TCP_CKSUM
1296 || flags0 & VNET_BUFFER_F_OFFLOAD_UDP_CKSUM))
1300 if (PREDICT_TRUE (is_tcp_udp0))
1302 udp0 = (udp_header_t *) ((u8 *) ip0 + udp_offset0);
1303 /* Don't verify UDP checksum for packets with explicit zero
1305 good_l4_csum0 |= type0 == IP_BUILTIN_PROTOCOL_UDP
1306 && udp0->checksum == 0;
1307 /* Verify UDP length. */
1308 if (is_tcp_udp0 == IP_PROTOCOL_UDP)
1310 ip_len0 = clib_net_to_host_u16 (ip0->payload_length);
1311 udp_len0 = clib_net_to_host_u16 (udp0->length);
1312 len_diff0 = ip_len0 - udp_len0;
1316 good_l4_csum0 |= type0 == IP_BUILTIN_PROTOCOL_UNKNOWN;
1317 len_diff0 = type0 == IP_BUILTIN_PROTOCOL_UDP ? len_diff0 : 0;
1319 if (PREDICT_FALSE (type0 != IP_BUILTIN_PROTOCOL_UNKNOWN
1322 VNET_BUFFER_F_L4_CHECKSUM_COMPUTED)))
1324 flags0 = ip6_tcp_udp_icmp_validate_checksum (vm, p0);
1326 (flags0 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0;
1329 error0 = IP6_ERROR_UNKNOWN_PROTOCOL;
1330 error0 = len_diff0 < 0 ? IP6_ERROR_UDP_LENGTH : error0;
1332 ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_UDP ==
1333 IP6_ERROR_UDP_CHECKSUM);
1334 ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_ICMP ==
1335 IP6_ERROR_ICMP_CHECKSUM);
1336 error0 = (!good_l4_csum0 ? IP6_ERROR_UDP_CHECKSUM + type0 : error0);
1338 /* If this is a neighbor solicitation (ICMP), skip src RPF check */
1339 if (error0 == IP6_ERROR_UNKNOWN_PROTOCOL &&
1340 type0 != IP_BUILTIN_PROTOCOL_ICMP &&
1341 !ip6_address_is_link_local_unicast (&ip0->src_address))
1343 error0 = (!ip6_urpf_loose_check (im, p0, ip0)
1344 ? IP6_ERROR_SRC_LOOKUP_MISS : error0);
1347 vnet_buffer (p0)->ip.fib_index =
1348 vec_elt (im->fib_index_by_sw_if_index,
1349 vnet_buffer (p0)->sw_if_index[VLIB_RX]);
1350 vnet_buffer (p0)->ip.fib_index =
1351 (vnet_buffer (p0)->sw_if_index[VLIB_TX] ==
1352 (u32) ~ 0) ? vnet_buffer (p0)->ip.
1353 fib_index : vnet_buffer (p0)->sw_if_index[VLIB_TX];
1357 next0 = lm->local_next_by_ip_protocol[ip0->protocol];
1359 error0 != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next0;
1361 p0->error = error_node->errors[error0];
1363 if (head_of_feature_arc)
1365 if (PREDICT_TRUE (error0 == (u8) IP6_ERROR_UNKNOWN_PROTOCOL))
1366 vnet_feature_arc_start (arc_index,
1367 vnet_buffer (p0)->sw_if_index
1368 [VLIB_RX], &next0, p0);
1371 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1372 to_next, n_left_to_next,
1376 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1379 return frame->n_vectors;
1383 ip6_local (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
1385 return ip6_local_inline (vm, node, frame, 1 /* head of feature arc */ );
1389 VLIB_REGISTER_NODE (ip6_local_node, static) =
1391 .function = ip6_local,
1392 .name = "ip6-local",
1393 .vector_size = sizeof (u32),
1394 .format_trace = format_ip6_forward_next_trace,
1395 .n_next_nodes = IP_LOCAL_N_NEXT,
1398 [IP_LOCAL_NEXT_DROP] = "ip6-drop",
1399 [IP_LOCAL_NEXT_PUNT] = "ip6-punt",
1400 [IP_LOCAL_NEXT_UDP_LOOKUP] = "ip6-udp-lookup",
1401 [IP_LOCAL_NEXT_ICMP] = "ip6-icmp-input",
1406 VLIB_NODE_FUNCTION_MULTIARCH (ip6_local_node, ip6_local);
1410 ip6_local_end_of_arc (vlib_main_t * vm,
1411 vlib_node_runtime_t * node, vlib_frame_t * frame)
1413 return ip6_local_inline (vm, node, frame, 0 /* head of feature arc */ );
1417 VLIB_REGISTER_NODE (ip6_local_end_of_arc_node,static) = {
1418 .function = ip6_local_end_of_arc,
1419 .name = "ip6-local-end-of-arc",
1420 .vector_size = sizeof (u32),
1422 .format_trace = format_ip6_forward_next_trace,
1423 .sibling_of = "ip6-local",
1426 VLIB_NODE_FUNCTION_MULTIARCH (ip6_local_end_of_arc_node, ip6_local_end_of_arc)
1428 VNET_FEATURE_INIT (ip6_local_end_of_arc, static) = {
1429 .arc_name = "ip6-local",
1430 .node_name = "ip6-local-end-of-arc",
1431 .runs_before = 0, /* not before any other features */
1436 ip6_register_protocol (u32 protocol, u32 node_index)
1438 vlib_main_t *vm = vlib_get_main ();
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] =
1444 vlib_node_add_next (vm, ip6_local_node.index, node_index);
1448 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 hi = vnet_get_sup_hw_interface (vnm, sw_if_index);
1491 /* Destination address is a solicited node multicast address. We need to fill in
1492 the low 24 bits with low 24 bits of target's address. */
1493 h->ip.dst_address.as_u8[13] = dst->as_u8[13];
1494 h->ip.dst_address.as_u8[14] = dst->as_u8[14];
1495 h->ip.dst_address.as_u8[15] = dst->as_u8[15];
1497 h->ip.src_address = src[0];
1498 h->neighbor.target_address = dst[0];
1500 if (PREDICT_FALSE (!hi->hw_address))
1502 return clib_error_return (0, "%U: interface %U do not support ip probe",
1503 format_ip6_address, dst,
1504 format_vnet_sw_if_index_name, vnm,
1508 clib_memcpy (h->link_layer_option.ethernet_address, hi->hw_address,
1509 vec_len (hi->hw_address));
1511 h->neighbor.icmp.checksum =
1512 ip6_tcp_udp_icmp_compute_checksum (vm, 0, &h->ip, &bogus_length);
1513 ASSERT (bogus_length == 0);
1515 b = vlib_get_buffer (vm, bi);
1516 vnet_buffer (b)->sw_if_index[VLIB_RX] =
1517 vnet_buffer (b)->sw_if_index[VLIB_TX] = sw_if_index;
1519 /* Add encapsulation string for software interface (e.g. ethernet header). */
1520 ip46_address_t nh = {
1524 ai = adj_nbr_add_or_lock (FIB_PROTOCOL_IP6,
1525 VNET_LINK_IP6, &nh, sw_if_index);
1528 /* Peer has been previously resolved, retrieve glean adj instead */
1529 if (adj->lookup_next_index == IP_LOOKUP_NEXT_REWRITE)
1532 ai = adj_glean_add_or_lock (FIB_PROTOCOL_IP6,
1533 VNET_LINK_IP6, sw_if_index, &nh);
1537 vnet_rewrite_one_header (adj[0], h, sizeof (ethernet_header_t));
1538 vlib_buffer_advance (b, -adj->rewrite_header.data_bytes);
1541 vlib_frame_t *f = vlib_get_frame_to_node (vm, hi->output_node_index);
1542 u32 *to_next = vlib_frame_vector_args (f);
1545 vlib_put_frame_to_node (vm, hi->output_node_index, f);
1549 return /* no error */ 0;
1554 IP6_REWRITE_NEXT_DROP,
1555 IP6_REWRITE_NEXT_ICMP_ERROR,
1556 } ip6_rewrite_next_t;
1559 * This bits of an IPv6 address to mask to construct a multicast
1562 #define IP6_MCAST_ADDR_MASK 0xffffffff
1565 ip6_mtu_check (vlib_buffer_t * b, u16 packet_bytes,
1566 u16 adj_packet_bytes, u32 * next, u32 * error)
1568 if (adj_packet_bytes >= 1280 && packet_bytes > adj_packet_bytes)
1570 *error = IP6_ERROR_MTU_EXCEEDED;
1571 icmp6_error_set_vnet_buffer (b, ICMP6_packet_too_big, 0,
1573 *next = IP6_REWRITE_NEXT_ICMP_ERROR;
1578 ip6_rewrite_inline (vlib_main_t * vm,
1579 vlib_node_runtime_t * node,
1580 vlib_frame_t * frame,
1581 int do_counters, int is_midchain, int is_mcast)
1583 ip_lookup_main_t *lm = &ip6_main.lookup_main;
1584 u32 *from = vlib_frame_vector_args (frame);
1585 u32 n_left_from, n_left_to_next, *to_next, next_index;
1586 vlib_node_runtime_t *error_node =
1587 vlib_node_get_runtime (vm, ip6_input_node.index);
1589 n_left_from = frame->n_vectors;
1590 next_index = node->cached_next_index;
1591 u32 thread_index = vlib_get_thread_index ();
1593 while (n_left_from > 0)
1595 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1597 while (n_left_from >= 4 && n_left_to_next >= 2)
1599 ip_adjacency_t *adj0, *adj1;
1600 vlib_buffer_t *p0, *p1;
1601 ip6_header_t *ip0, *ip1;
1602 u32 pi0, rw_len0, next0, error0, adj_index0;
1603 u32 pi1, rw_len1, next1, error1, adj_index1;
1604 u32 tx_sw_if_index0, tx_sw_if_index1;
1606 /* Prefetch next iteration. */
1608 vlib_buffer_t *p2, *p3;
1610 p2 = vlib_get_buffer (vm, from[2]);
1611 p3 = vlib_get_buffer (vm, from[3]);
1613 vlib_prefetch_buffer_header (p2, LOAD);
1614 vlib_prefetch_buffer_header (p3, LOAD);
1616 CLIB_PREFETCH (p2->pre_data, 32, STORE);
1617 CLIB_PREFETCH (p3->pre_data, 32, STORE);
1619 CLIB_PREFETCH (p2->data, sizeof (ip0[0]), STORE);
1620 CLIB_PREFETCH (p3->data, sizeof (ip0[0]), STORE);
1623 pi0 = to_next[0] = from[0];
1624 pi1 = to_next[1] = from[1];
1629 n_left_to_next -= 2;
1631 p0 = vlib_get_buffer (vm, pi0);
1632 p1 = vlib_get_buffer (vm, pi1);
1634 adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
1635 adj_index1 = vnet_buffer (p1)->ip.adj_index[VLIB_TX];
1637 ip0 = vlib_buffer_get_current (p0);
1638 ip1 = vlib_buffer_get_current (p1);
1640 error0 = error1 = IP6_ERROR_NONE;
1641 next0 = next1 = IP6_REWRITE_NEXT_DROP;
1643 if (PREDICT_TRUE (!(p0->flags & VNET_BUFFER_F_LOCALLY_ORIGINATED)))
1645 i32 hop_limit0 = ip0->hop_limit;
1647 /* Input node should have reject packets with hop limit 0. */
1648 ASSERT (ip0->hop_limit > 0);
1652 ip0->hop_limit = hop_limit0;
1655 * If the hop count drops below 1 when forwarding, generate
1658 if (PREDICT_FALSE (hop_limit0 <= 0))
1660 error0 = IP6_ERROR_TIME_EXPIRED;
1661 next0 = IP6_REWRITE_NEXT_ICMP_ERROR;
1662 vnet_buffer (p0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
1663 icmp6_error_set_vnet_buffer (p0, ICMP6_time_exceeded,
1664 ICMP6_time_exceeded_ttl_exceeded_in_transit,
1670 p0->flags &= ~VNET_BUFFER_F_LOCALLY_ORIGINATED;
1672 if (PREDICT_TRUE (!(p1->flags & VNET_BUFFER_F_LOCALLY_ORIGINATED)))
1674 i32 hop_limit1 = ip1->hop_limit;
1676 /* Input node should have reject packets with hop limit 0. */
1677 ASSERT (ip1->hop_limit > 0);
1681 ip1->hop_limit = hop_limit1;
1684 * If the hop count drops below 1 when forwarding, generate
1687 if (PREDICT_FALSE (hop_limit1 <= 0))
1689 error1 = IP6_ERROR_TIME_EXPIRED;
1690 next1 = IP6_REWRITE_NEXT_ICMP_ERROR;
1691 vnet_buffer (p1)->sw_if_index[VLIB_TX] = (u32) ~ 0;
1692 icmp6_error_set_vnet_buffer (p1, ICMP6_time_exceeded,
1693 ICMP6_time_exceeded_ttl_exceeded_in_transit,
1699 p1->flags &= ~VNET_BUFFER_F_LOCALLY_ORIGINATED;
1701 adj0 = adj_get (adj_index0);
1702 adj1 = adj_get (adj_index1);
1704 rw_len0 = adj0[0].rewrite_header.data_bytes;
1705 rw_len1 = adj1[0].rewrite_header.data_bytes;
1706 vnet_buffer (p0)->ip.save_rewrite_length = rw_len0;
1707 vnet_buffer (p1)->ip.save_rewrite_length = rw_len1;
1711 vlib_increment_combined_counter
1712 (&adjacency_counters,
1713 thread_index, adj_index0, 1,
1714 vlib_buffer_length_in_chain (vm, p0) + rw_len0);
1715 vlib_increment_combined_counter
1716 (&adjacency_counters,
1717 thread_index, adj_index1, 1,
1718 vlib_buffer_length_in_chain (vm, p1) + rw_len1);
1721 /* Check MTU of outgoing interface. */
1722 ip6_mtu_check (p0, clib_net_to_host_u16 (ip0->payload_length) +
1723 sizeof (ip6_header_t),
1724 adj0[0].rewrite_header.max_l3_packet_bytes,
1726 ip6_mtu_check (p1, clib_net_to_host_u16 (ip1->payload_length) +
1727 sizeof (ip6_header_t),
1728 adj1[0].rewrite_header.max_l3_packet_bytes,
1731 /* Don't adjust the buffer for hop count issue; icmp-error node
1732 * wants to see the IP headerr */
1733 if (PREDICT_TRUE (error0 == IP6_ERROR_NONE))
1735 p0->current_data -= rw_len0;
1736 p0->current_length += rw_len0;
1738 tx_sw_if_index0 = adj0[0].rewrite_header.sw_if_index;
1739 vnet_buffer (p0)->sw_if_index[VLIB_TX] = tx_sw_if_index0;
1740 next0 = adj0[0].rewrite_header.next_index;
1743 (adj0[0].rewrite_header.flags & VNET_REWRITE_HAS_FEATURES))
1744 vnet_feature_arc_start (lm->output_feature_arc_index,
1745 tx_sw_if_index0, &next0, p0);
1747 if (PREDICT_TRUE (error1 == IP6_ERROR_NONE))
1749 p1->current_data -= rw_len1;
1750 p1->current_length += rw_len1;
1752 tx_sw_if_index1 = adj1[0].rewrite_header.sw_if_index;
1753 vnet_buffer (p1)->sw_if_index[VLIB_TX] = tx_sw_if_index1;
1754 next1 = adj1[0].rewrite_header.next_index;
1757 (adj1[0].rewrite_header.flags & VNET_REWRITE_HAS_FEATURES))
1758 vnet_feature_arc_start (lm->output_feature_arc_index,
1759 tx_sw_if_index1, &next1, p1);
1762 /* Guess we are only writing on simple Ethernet header. */
1763 vnet_rewrite_two_headers (adj0[0], adj1[0],
1764 ip0, ip1, sizeof (ethernet_header_t));
1768 adj0->sub_type.midchain.fixup_func
1769 (vm, adj0, p0, adj0->sub_type.midchain.fixup_data);
1770 adj1->sub_type.midchain.fixup_func
1771 (vm, adj1, p1, adj1->sub_type.midchain.fixup_data);
1776 * copy bytes from the IP address into the MAC rewrite
1778 vnet_ip_mcast_fixup_header (IP6_MCAST_ADDR_MASK,
1780 rewrite_header.dst_mcast_offset,
1781 &ip0->dst_address.as_u32[3],
1783 vnet_ip_mcast_fixup_header (IP6_MCAST_ADDR_MASK,
1785 rewrite_header.dst_mcast_offset,
1786 &ip1->dst_address.as_u32[3],
1790 vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
1791 to_next, n_left_to_next,
1792 pi0, pi1, next0, next1);
1795 while (n_left_from > 0 && n_left_to_next > 0)
1797 ip_adjacency_t *adj0;
1801 u32 adj_index0, next0, error0;
1802 u32 tx_sw_if_index0;
1804 pi0 = to_next[0] = from[0];
1806 p0 = vlib_get_buffer (vm, pi0);
1808 adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
1810 adj0 = adj_get (adj_index0);
1812 ip0 = vlib_buffer_get_current (p0);
1814 error0 = IP6_ERROR_NONE;
1815 next0 = IP6_REWRITE_NEXT_DROP;
1817 /* Check hop limit */
1818 if (PREDICT_TRUE (!(p0->flags & VNET_BUFFER_F_LOCALLY_ORIGINATED)))
1820 i32 hop_limit0 = ip0->hop_limit;
1822 ASSERT (ip0->hop_limit > 0);
1826 ip0->hop_limit = hop_limit0;
1828 if (PREDICT_FALSE (hop_limit0 <= 0))
1831 * If the hop count drops below 1 when forwarding, generate
1834 error0 = IP6_ERROR_TIME_EXPIRED;
1835 next0 = IP6_REWRITE_NEXT_ICMP_ERROR;
1836 vnet_buffer (p0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
1837 icmp6_error_set_vnet_buffer (p0, ICMP6_time_exceeded,
1838 ICMP6_time_exceeded_ttl_exceeded_in_transit,
1844 p0->flags &= ~VNET_BUFFER_F_LOCALLY_ORIGINATED;
1847 /* Guess we are only writing on simple Ethernet header. */
1848 vnet_rewrite_one_header (adj0[0], ip0, sizeof (ethernet_header_t));
1850 /* Update packet buffer attributes/set output interface. */
1851 rw_len0 = adj0[0].rewrite_header.data_bytes;
1852 vnet_buffer (p0)->ip.save_rewrite_length = rw_len0;
1856 vlib_increment_combined_counter
1857 (&adjacency_counters,
1858 thread_index, adj_index0, 1,
1859 vlib_buffer_length_in_chain (vm, p0) + rw_len0);
1862 /* Check MTU of outgoing interface. */
1863 ip6_mtu_check (p0, clib_net_to_host_u16 (ip0->payload_length) +
1864 sizeof (ip6_header_t),
1865 adj0[0].rewrite_header.max_l3_packet_bytes,
1868 /* Don't adjust the buffer for hop count issue; icmp-error node
1869 * wants to see the IP header */
1870 if (PREDICT_TRUE (error0 == IP6_ERROR_NONE))
1872 p0->current_data -= rw_len0;
1873 p0->current_length += rw_len0;
1875 tx_sw_if_index0 = adj0[0].rewrite_header.sw_if_index;
1877 vnet_buffer (p0)->sw_if_index[VLIB_TX] = tx_sw_if_index0;
1878 next0 = adj0[0].rewrite_header.next_index;
1881 (adj0[0].rewrite_header.flags & VNET_REWRITE_HAS_FEATURES))
1882 vnet_feature_arc_start (lm->output_feature_arc_index,
1883 tx_sw_if_index0, &next0, p0);
1888 adj0->sub_type.midchain.fixup_func
1889 (vm, adj0, p0, adj0->sub_type.midchain.fixup_data);
1893 vnet_ip_mcast_fixup_header (IP6_MCAST_ADDR_MASK,
1895 rewrite_header.dst_mcast_offset,
1896 &ip0->dst_address.as_u32[3],
1900 p0->error = error_node->errors[error0];
1905 n_left_to_next -= 1;
1907 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1908 to_next, n_left_to_next,
1912 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1915 /* Need to do trace after rewrites to pick up new packet data. */
1916 if (node->flags & VLIB_NODE_FLAG_TRACE)
1917 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
1919 return frame->n_vectors;
1923 ip6_rewrite (vlib_main_t * vm,
1924 vlib_node_runtime_t * node, vlib_frame_t * frame)
1926 if (adj_are_counters_enabled ())
1927 return ip6_rewrite_inline (vm, node, frame, 1, 0, 0);
1929 return ip6_rewrite_inline (vm, node, frame, 0, 0, 0);
1933 ip6_rewrite_mcast (vlib_main_t * vm,
1934 vlib_node_runtime_t * node, vlib_frame_t * frame)
1936 if (adj_are_counters_enabled ())
1937 return ip6_rewrite_inline (vm, node, frame, 1, 0, 1);
1939 return ip6_rewrite_inline (vm, node, frame, 0, 0, 1);
1943 ip6_midchain (vlib_main_t * vm,
1944 vlib_node_runtime_t * node, vlib_frame_t * frame)
1946 if (adj_are_counters_enabled ())
1947 return ip6_rewrite_inline (vm, node, frame, 1, 1, 0);
1949 return ip6_rewrite_inline (vm, node, frame, 0, 1, 0);
1953 ip6_mcast_midchain (vlib_main_t * vm,
1954 vlib_node_runtime_t * node, vlib_frame_t * frame)
1956 if (adj_are_counters_enabled ())
1957 return ip6_rewrite_inline (vm, node, frame, 1, 1, 1);
1959 return ip6_rewrite_inline (vm, node, frame, 0, 1, 1);
1963 VLIB_REGISTER_NODE (ip6_midchain_node) =
1965 .function = ip6_midchain,
1966 .name = "ip6-midchain",
1967 .vector_size = sizeof (u32),
1968 .format_trace = format_ip6_forward_next_trace,
1969 .sibling_of = "ip6-rewrite",
1973 VLIB_NODE_FUNCTION_MULTIARCH (ip6_midchain_node, ip6_midchain);
1976 VLIB_REGISTER_NODE (ip6_rewrite_node) =
1978 .function = ip6_rewrite,
1979 .name = "ip6-rewrite",
1980 .vector_size = sizeof (u32),
1981 .format_trace = format_ip6_rewrite_trace,
1985 [IP6_REWRITE_NEXT_DROP] = "ip6-drop",
1986 [IP6_REWRITE_NEXT_ICMP_ERROR] = "ip6-icmp-error",
1991 VLIB_NODE_FUNCTION_MULTIARCH (ip6_rewrite_node, ip6_rewrite);
1994 VLIB_REGISTER_NODE (ip6_rewrite_mcast_node) =
1996 .function = ip6_rewrite_mcast,
1997 .name = "ip6-rewrite-mcast",
1998 .vector_size = sizeof (u32),
1999 .format_trace = format_ip6_rewrite_trace,
2000 .sibling_of = "ip6-rewrite",
2004 VLIB_NODE_FUNCTION_MULTIARCH (ip6_rewrite_mcast_node, ip6_rewrite_mcast);
2007 VLIB_REGISTER_NODE (ip6_mcast_midchain_node, static) =
2009 .function = ip6_mcast_midchain,
2010 .name = "ip6-mcast-midchain",
2011 .vector_size = sizeof (u32),
2012 .format_trace = format_ip6_rewrite_trace,
2013 .sibling_of = "ip6-rewrite",
2017 VLIB_NODE_FUNCTION_MULTIARCH (ip6_mcast_midchain_node, ip6_mcast_midchain);
2020 * Hop-by-Hop handling
2022 ip6_hop_by_hop_main_t ip6_hop_by_hop_main;
2024 #define foreach_ip6_hop_by_hop_error \
2025 _(PROCESSED, "pkts with ip6 hop-by-hop options") \
2026 _(FORMAT, "incorrectly formatted hop-by-hop options") \
2027 _(UNKNOWN_OPTION, "unknown ip6 hop-by-hop options")
2032 #define _(sym,str) IP6_HOP_BY_HOP_ERROR_##sym,
2033 foreach_ip6_hop_by_hop_error
2035 IP6_HOP_BY_HOP_N_ERROR,
2036 } ip6_hop_by_hop_error_t;
2040 * Primary h-b-h handler trace support
2041 * We work pretty hard on the problem for obvious reasons
2047 u8 option_data[256];
2048 } ip6_hop_by_hop_trace_t;
2050 vlib_node_registration_t ip6_hop_by_hop_node;
2052 static char *ip6_hop_by_hop_error_strings[] = {
2053 #define _(sym,string) string,
2054 foreach_ip6_hop_by_hop_error
2059 format_ip6_hop_by_hop_ext_hdr (u8 * s, va_list * args)
2061 ip6_hop_by_hop_header_t *hbh0 = va_arg (*args, ip6_hop_by_hop_header_t *);
2062 int total_len = va_arg (*args, int);
2063 ip6_hop_by_hop_option_t *opt0, *limit0;
2064 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2067 s = format (s, "IP6_HOP_BY_HOP: next protocol %d len %d total %d",
2068 hbh0->protocol, (hbh0->length + 1) << 3, total_len);
2070 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2071 limit0 = (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 + total_len);
2073 while (opt0 < limit0)
2078 case 0: /* Pad, just stop */
2079 opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0 + 1);
2083 if (hm->trace[type0])
2085 s = (*hm->trace[type0]) (s, opt0);
2090 format (s, "\n unrecognized option %d length %d", type0,
2094 (ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length +
2095 sizeof (ip6_hop_by_hop_option_t));
2103 format_ip6_hop_by_hop_trace (u8 * s, va_list * args)
2105 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
2106 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
2107 ip6_hop_by_hop_trace_t *t = va_arg (*args, ip6_hop_by_hop_trace_t *);
2108 ip6_hop_by_hop_header_t *hbh0;
2109 ip6_hop_by_hop_option_t *opt0, *limit0;
2110 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2114 hbh0 = (ip6_hop_by_hop_header_t *) t->option_data;
2116 s = format (s, "IP6_HOP_BY_HOP: next index %d len %d traced %d",
2117 t->next_index, (hbh0->length + 1) << 3, t->trace_len);
2119 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2120 limit0 = (ip6_hop_by_hop_option_t *) ((u8 *) hbh0) + t->trace_len;
2122 while (opt0 < limit0)
2127 case 0: /* Pad, just stop */
2128 opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0) + 1;
2132 if (hm->trace[type0])
2134 s = (*hm->trace[type0]) (s, opt0);
2139 format (s, "\n unrecognized option %d length %d", type0,
2143 (ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length +
2144 sizeof (ip6_hop_by_hop_option_t));
2152 ip6_scan_hbh_options (vlib_buffer_t * b0,
2154 ip6_hop_by_hop_header_t * hbh0,
2155 ip6_hop_by_hop_option_t * opt0,
2156 ip6_hop_by_hop_option_t * limit0, u32 * next0)
2158 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2162 while (opt0 < limit0)
2168 opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0) + 1;
2173 if (hm->options[type0])
2175 if ((*hm->options[type0]) (b0, ip0, opt0) < 0)
2177 error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2183 /* Unrecognized mandatory option, check the two high order bits */
2184 switch (opt0->type & HBH_OPTION_TYPE_HIGH_ORDER_BITS)
2186 case HBH_OPTION_TYPE_SKIP_UNKNOWN:
2188 case HBH_OPTION_TYPE_DISCARD_UNKNOWN:
2189 error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2190 *next0 = IP_LOOKUP_NEXT_DROP;
2192 case HBH_OPTION_TYPE_DISCARD_UNKNOWN_ICMP:
2193 error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2194 *next0 = IP_LOOKUP_NEXT_ICMP_ERROR;
2195 icmp6_error_set_vnet_buffer (b0, ICMP6_parameter_problem,
2196 ICMP6_parameter_problem_unrecognized_option,
2197 (u8 *) opt0 - (u8 *) ip0);
2199 case HBH_OPTION_TYPE_DISCARD_UNKNOWN_ICMP_NOT_MCAST:
2200 error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2201 if (!ip6_address_is_multicast (&ip0->dst_address))
2203 *next0 = IP_LOOKUP_NEXT_ICMP_ERROR;
2204 icmp6_error_set_vnet_buffer (b0,
2205 ICMP6_parameter_problem,
2206 ICMP6_parameter_problem_unrecognized_option,
2207 (u8 *) opt0 - (u8 *) ip0);
2211 *next0 = IP_LOOKUP_NEXT_DROP;
2219 (ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length +
2220 sizeof (ip6_hop_by_hop_option_t));
2226 * Process the Hop-by-Hop Options header
2229 ip6_hop_by_hop (vlib_main_t * vm,
2230 vlib_node_runtime_t * node, vlib_frame_t * frame)
2232 vlib_node_runtime_t *error_node =
2233 vlib_node_get_runtime (vm, ip6_hop_by_hop_node.index);
2234 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2235 u32 n_left_from, *from, *to_next;
2236 ip_lookup_next_t next_index;
2238 from = vlib_frame_vector_args (frame);
2239 n_left_from = frame->n_vectors;
2240 next_index = node->cached_next_index;
2242 while (n_left_from > 0)
2246 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
2248 while (n_left_from >= 4 && n_left_to_next >= 2)
2251 vlib_buffer_t *b0, *b1;
2253 ip6_header_t *ip0, *ip1;
2254 ip6_hop_by_hop_header_t *hbh0, *hbh1;
2255 ip6_hop_by_hop_option_t *opt0, *limit0, *opt1, *limit1;
2256 u8 error0 = 0, error1 = 0;
2258 /* Prefetch next iteration. */
2260 vlib_buffer_t *p2, *p3;
2262 p2 = vlib_get_buffer (vm, from[2]);
2263 p3 = vlib_get_buffer (vm, from[3]);
2265 vlib_prefetch_buffer_header (p2, LOAD);
2266 vlib_prefetch_buffer_header (p3, LOAD);
2268 CLIB_PREFETCH (p2->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
2269 CLIB_PREFETCH (p3->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
2272 /* Speculatively enqueue b0, b1 to the current next frame */
2273 to_next[0] = bi0 = from[0];
2274 to_next[1] = bi1 = from[1];
2278 n_left_to_next -= 2;
2280 b0 = vlib_get_buffer (vm, bi0);
2281 b1 = vlib_get_buffer (vm, bi1);
2283 /* Default use the next_index from the adjacency. A HBH option rarely redirects to a different node */
2284 u32 adj_index0 = vnet_buffer (b0)->ip.adj_index[VLIB_TX];
2285 ip_adjacency_t *adj0 = adj_get (adj_index0);
2286 u32 adj_index1 = vnet_buffer (b1)->ip.adj_index[VLIB_TX];
2287 ip_adjacency_t *adj1 = adj_get (adj_index1);
2289 /* Default use the next_index from the adjacency. A HBH option rarely redirects to a different node */
2290 next0 = adj0->lookup_next_index;
2291 next1 = adj1->lookup_next_index;
2293 ip0 = vlib_buffer_get_current (b0);
2294 ip1 = vlib_buffer_get_current (b1);
2295 hbh0 = (ip6_hop_by_hop_header_t *) (ip0 + 1);
2296 hbh1 = (ip6_hop_by_hop_header_t *) (ip1 + 1);
2297 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2298 opt1 = (ip6_hop_by_hop_option_t *) (hbh1 + 1);
2300 (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 +
2301 ((hbh0->length + 1) << 3));
2303 (ip6_hop_by_hop_option_t *) ((u8 *) hbh1 +
2304 ((hbh1->length + 1) << 3));
2307 * Basic validity checks
2309 if ((hbh0->length + 1) << 3 >
2310 clib_net_to_host_u16 (ip0->payload_length))
2312 error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2313 next0 = IP_LOOKUP_NEXT_DROP;
2316 /* Scan the set of h-b-h options, process ones that we understand */
2317 error0 = ip6_scan_hbh_options (b0, ip0, hbh0, opt0, limit0, &next0);
2319 if ((hbh1->length + 1) << 3 >
2320 clib_net_to_host_u16 (ip1->payload_length))
2322 error1 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2323 next1 = IP_LOOKUP_NEXT_DROP;
2326 /* Scan the set of h-b-h options, process ones that we understand */
2327 error1 = ip6_scan_hbh_options (b1, ip1, hbh1, opt1, limit1, &next1);
2330 /* Has the classifier flagged this buffer for special treatment? */
2333 && (vnet_buffer (b0)->l2_classify.opaque_index & OI_DECAP)))
2334 next0 = hm->next_override;
2336 /* Has the classifier flagged this buffer for special treatment? */
2339 && (vnet_buffer (b1)->l2_classify.opaque_index & OI_DECAP)))
2340 next1 = hm->next_override;
2342 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)))
2344 if (b0->flags & VLIB_BUFFER_IS_TRACED)
2346 ip6_hop_by_hop_trace_t *t =
2347 vlib_add_trace (vm, node, b0, sizeof (*t));
2348 u32 trace_len = (hbh0->length + 1) << 3;
2349 t->next_index = next0;
2350 /* Capture the h-b-h option verbatim */
2353 ARRAY_LEN (t->option_data) ? trace_len :
2354 ARRAY_LEN (t->option_data);
2355 t->trace_len = trace_len;
2356 clib_memcpy (t->option_data, hbh0, trace_len);
2358 if (b1->flags & VLIB_BUFFER_IS_TRACED)
2360 ip6_hop_by_hop_trace_t *t =
2361 vlib_add_trace (vm, node, b1, sizeof (*t));
2362 u32 trace_len = (hbh1->length + 1) << 3;
2363 t->next_index = next1;
2364 /* Capture the h-b-h option verbatim */
2367 ARRAY_LEN (t->option_data) ? trace_len :
2368 ARRAY_LEN (t->option_data);
2369 t->trace_len = trace_len;
2370 clib_memcpy (t->option_data, hbh1, trace_len);
2375 b0->error = error_node->errors[error0];
2376 b1->error = error_node->errors[error1];
2378 /* verify speculative enqueue, maybe switch current next frame */
2379 vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
2380 n_left_to_next, bi0, bi1, next0,
2384 while (n_left_from > 0 && n_left_to_next > 0)
2390 ip6_hop_by_hop_header_t *hbh0;
2391 ip6_hop_by_hop_option_t *opt0, *limit0;
2394 /* Speculatively enqueue b0 to the current next frame */
2400 n_left_to_next -= 1;
2402 b0 = vlib_get_buffer (vm, bi0);
2404 * Default use the next_index from the adjacency.
2405 * A HBH option rarely redirects to a different node
2407 u32 adj_index0 = vnet_buffer (b0)->ip.adj_index[VLIB_TX];
2408 ip_adjacency_t *adj0 = adj_get (adj_index0);
2409 next0 = adj0->lookup_next_index;
2411 ip0 = vlib_buffer_get_current (b0);
2412 hbh0 = (ip6_hop_by_hop_header_t *) (ip0 + 1);
2413 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2415 (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 +
2416 ((hbh0->length + 1) << 3));
2419 * Basic validity checks
2421 if ((hbh0->length + 1) << 3 >
2422 clib_net_to_host_u16 (ip0->payload_length))
2424 error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2425 next0 = IP_LOOKUP_NEXT_DROP;
2429 /* Scan the set of h-b-h options, process ones that we understand */
2430 error0 = ip6_scan_hbh_options (b0, ip0, hbh0, opt0, limit0, &next0);
2433 /* Has the classifier flagged this buffer for special treatment? */
2436 && (vnet_buffer (b0)->l2_classify.opaque_index & OI_DECAP)))
2437 next0 = hm->next_override;
2439 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
2441 ip6_hop_by_hop_trace_t *t =
2442 vlib_add_trace (vm, node, b0, sizeof (*t));
2443 u32 trace_len = (hbh0->length + 1) << 3;
2444 t->next_index = next0;
2445 /* Capture the h-b-h option verbatim */
2448 ARRAY_LEN (t->option_data) ? trace_len :
2449 ARRAY_LEN (t->option_data);
2450 t->trace_len = trace_len;
2451 clib_memcpy (t->option_data, hbh0, trace_len);
2454 b0->error = error_node->errors[error0];
2456 /* verify speculative enqueue, maybe switch current next frame */
2457 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
2458 n_left_to_next, bi0, next0);
2460 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2462 return frame->n_vectors;
2466 VLIB_REGISTER_NODE (ip6_hop_by_hop_node) =
2468 .function = ip6_hop_by_hop,
2469 .name = "ip6-hop-by-hop",
2470 .sibling_of = "ip6-lookup",
2471 .vector_size = sizeof (u32),
2472 .format_trace = format_ip6_hop_by_hop_trace,
2473 .type = VLIB_NODE_TYPE_INTERNAL,
2474 .n_errors = ARRAY_LEN (ip6_hop_by_hop_error_strings),
2475 .error_strings = ip6_hop_by_hop_error_strings,
2480 VLIB_NODE_FUNCTION_MULTIARCH (ip6_hop_by_hop_node, ip6_hop_by_hop);
2482 static clib_error_t *
2483 ip6_hop_by_hop_init (vlib_main_t * vm)
2485 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2486 memset (hm->options, 0, sizeof (hm->options));
2487 memset (hm->trace, 0, sizeof (hm->trace));
2488 hm->next_override = IP6_LOOKUP_NEXT_POP_HOP_BY_HOP;
2492 VLIB_INIT_FUNCTION (ip6_hop_by_hop_init);
2495 ip6_hbh_set_next_override (uword next)
2497 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2499 hm->next_override = next;
2503 ip6_hbh_register_option (u8 option,
2504 int options (vlib_buffer_t * b, ip6_header_t * ip,
2505 ip6_hop_by_hop_option_t * opt),
2506 u8 * trace (u8 * s, ip6_hop_by_hop_option_t * opt))
2508 ip6_main_t *im = &ip6_main;
2509 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2511 ASSERT ((u32) option < ARRAY_LEN (hm->options));
2513 /* Already registered */
2514 if (hm->options[option])
2517 hm->options[option] = options;
2518 hm->trace[option] = trace;
2520 /* Set global variable */
2521 im->hbh_enabled = 1;
2527 ip6_hbh_unregister_option (u8 option)
2529 ip6_main_t *im = &ip6_main;
2530 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2532 ASSERT ((u32) option < ARRAY_LEN (hm->options));
2534 /* Not registered */
2535 if (!hm->options[option])
2538 hm->options[option] = NULL;
2539 hm->trace[option] = NULL;
2541 /* Disable global knob if this was the last option configured */
2544 for (i = 0; i < 256; i++)
2546 if (hm->options[option])
2553 im->hbh_enabled = 0;
2558 /* Global IP6 main. */
2559 ip6_main_t ip6_main;
2561 static clib_error_t *
2562 ip6_lookup_init (vlib_main_t * vm)
2564 ip6_main_t *im = &ip6_main;
2565 clib_error_t *error;
2568 if ((error = vlib_call_init_function (vm, vnet_feature_init)))
2571 for (i = 0; i < ARRAY_LEN (im->fib_masks); i++)
2578 for (j = 0; j < i0; j++)
2579 im->fib_masks[i].as_u32[j] = ~0;
2582 im->fib_masks[i].as_u32[i0] =
2583 clib_host_to_net_u32 (pow2_mask (i1) << (32 - i1));
2586 ip_lookup_init (&im->lookup_main, /* is_ip6 */ 1);
2588 if (im->lookup_table_nbuckets == 0)
2589 im->lookup_table_nbuckets = IP6_FIB_DEFAULT_HASH_NUM_BUCKETS;
2591 im->lookup_table_nbuckets = 1 << max_log2 (im->lookup_table_nbuckets);
2593 if (im->lookup_table_size == 0)
2594 im->lookup_table_size = IP6_FIB_DEFAULT_HASH_MEMORY_SIZE;
2596 BV (clib_bihash_init) (&(im->ip6_table[IP6_FIB_TABLE_FWDING].ip6_hash),
2597 "ip6 FIB fwding table",
2598 im->lookup_table_nbuckets, im->lookup_table_size);
2599 BV (clib_bihash_init) (&im->ip6_table[IP6_FIB_TABLE_NON_FWDING].ip6_hash,
2600 "ip6 FIB non-fwding table",
2601 im->lookup_table_nbuckets, im->lookup_table_size);
2603 /* Create FIB with index 0 and table id of 0. */
2604 fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6, 0,
2605 FIB_SOURCE_DEFAULT_ROUTE);
2606 mfib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6, 0,
2607 MFIB_SOURCE_DEFAULT_ROUTE);
2611 pn = pg_get_node (ip6_lookup_node.index);
2612 pn->unformat_edit = unformat_pg_ip6_header;
2615 /* Unless explicitly configured, don't process HBH options */
2616 im->hbh_enabled = 0;
2619 icmp6_neighbor_solicitation_header_t p;
2621 memset (&p, 0, sizeof (p));
2623 p.ip.ip_version_traffic_class_and_flow_label =
2624 clib_host_to_net_u32 (0x6 << 28);
2625 p.ip.payload_length =
2626 clib_host_to_net_u16 (sizeof (p) -
2628 (icmp6_neighbor_solicitation_header_t, neighbor));
2629 p.ip.protocol = IP_PROTOCOL_ICMP6;
2630 p.ip.hop_limit = 255;
2631 ip6_set_solicited_node_multicast_address (&p.ip.dst_address, 0);
2633 p.neighbor.icmp.type = ICMP6_neighbor_solicitation;
2635 p.link_layer_option.header.type =
2636 ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address;
2637 p.link_layer_option.header.n_data_u64s =
2638 sizeof (p.link_layer_option) / sizeof (u64);
2640 vlib_packet_template_init (vm,
2641 &im->discover_neighbor_packet_template,
2643 /* alloc chunk size */ 8,
2644 "ip6 neighbor discovery");
2650 VLIB_INIT_FUNCTION (ip6_lookup_init);
2653 ip6_link_local_address_from_ethernet_mac_address (ip6_address_t * ip,
2656 ip->as_u64[0] = clib_host_to_net_u64 (0xFE80000000000000ULL);
2657 /* Invert the "u" bit */
2658 ip->as_u8[8] = mac[0] ^ (1 << 1);
2659 ip->as_u8[9] = mac[1];
2660 ip->as_u8[10] = mac[2];
2661 ip->as_u8[11] = 0xFF;
2662 ip->as_u8[12] = 0xFE;
2663 ip->as_u8[13] = mac[3];
2664 ip->as_u8[14] = mac[4];
2665 ip->as_u8[15] = mac[5];
2669 ip6_ethernet_mac_address_from_link_local_address (u8 * mac,
2672 /* Invert the previously inverted "u" bit */
2673 mac[0] = ip->as_u8[8] ^ (1 << 1);
2674 mac[1] = ip->as_u8[9];
2675 mac[2] = ip->as_u8[10];
2676 mac[3] = ip->as_u8[13];
2677 mac[4] = ip->as_u8[14];
2678 mac[5] = ip->as_u8[15];
2681 static clib_error_t *
2682 test_ip6_link_command_fn (vlib_main_t * vm,
2683 unformat_input_t * input, vlib_cli_command_t * cmd)
2686 ip6_address_t _a, *a = &_a;
2688 if (unformat (input, "%U", unformat_ethernet_address, mac))
2690 ip6_link_local_address_from_ethernet_mac_address (a, mac);
2691 vlib_cli_output (vm, "Link local address: %U", format_ip6_address, a);
2692 ip6_ethernet_mac_address_from_link_local_address (mac, a);
2693 vlib_cli_output (vm, "Original MAC address: %U",
2694 format_ethernet_address, mac);
2701 * This command converts the given MAC Address into an IPv6 link-local
2705 * Example of how to create an IPv6 link-local address:
2706 * @cliexstart{test ip6 link 16:d9:e0:91:79:86}
2707 * Link local address: fe80::14d9:e0ff:fe91:7986
2708 * Original MAC address: 16:d9:e0:91:79:86
2712 VLIB_CLI_COMMAND (test_link_command, static) =
2714 .path = "test ip6 link",
2715 .function = test_ip6_link_command_fn,
2716 .short_help = "test ip6 link <mac-address>",
2721 vnet_set_ip6_flow_hash (u32 table_id, u32 flow_hash_config)
2725 fib_index = fib_table_find (FIB_PROTOCOL_IP6, table_id);
2727 if (~0 == fib_index)
2728 return VNET_API_ERROR_NO_SUCH_FIB;
2730 fib_table_set_flow_hash_config (fib_index, FIB_PROTOCOL_IP6,
2736 static clib_error_t *
2737 set_ip6_flow_hash_command_fn (vlib_main_t * vm,
2738 unformat_input_t * input,
2739 vlib_cli_command_t * cmd)
2743 u32 flow_hash_config = 0;
2746 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
2748 if (unformat (input, "table %d", &table_id))
2751 else if (unformat (input, #a)) { flow_hash_config |= v; matched=1;}
2752 foreach_flow_hash_bit
2759 return clib_error_return (0, "unknown input `%U'",
2760 format_unformat_error, input);
2762 rv = vnet_set_ip6_flow_hash (table_id, flow_hash_config);
2769 return clib_error_return (0, "no such FIB table %d", table_id);
2772 clib_warning ("BUG: illegal flow hash config 0x%x", flow_hash_config);
2780 * Configure the set of IPv6 fields used by the flow hash.
2784 * Example of how to set the flow hash on a given table:
2785 * @cliexcmd{set ip6 flow-hash table 8 dst sport dport proto}
2787 * Example of display the configured flow hash:
2788 * @cliexstart{show ip6 fib}
2789 * ipv6-VRF:0, fib_index 0, flow hash: src dst sport dport proto
2792 * [@0]: dpo-load-balance: [index:5 buckets:1 uRPF:5 to:[0:0]]
2793 * [0] [@0]: dpo-drop ip6
2796 * [@0]: dpo-load-balance: [index:10 buckets:1 uRPF:10 to:[0:0]]
2797 * [0] [@2]: dpo-receive
2800 * [@0]: dpo-load-balance: [index:8 buckets:1 uRPF:8 to:[0:0]]
2801 * [0] [@2]: dpo-receive
2804 * [@0]: dpo-load-balance: [index:7 buckets:1 uRPF:7 to:[0:0]]
2805 * [0] [@2]: dpo-receive
2808 * [@0]: dpo-load-balance: [index:9 buckets:1 uRPF:9 to:[0:0]]
2809 * [0] [@2]: dpo-receive
2810 * ff02::1:ff00:0/104
2812 * [@0]: dpo-load-balance: [index:6 buckets:1 uRPF:6 to:[0:0]]
2813 * [0] [@2]: dpo-receive
2814 * ipv6-VRF:8, fib_index 1, flow hash: dst sport dport proto
2817 * [@0]: dpo-load-balance: [index:21 buckets:1 uRPF:20 to:[0:0]]
2818 * [0] [@0]: dpo-drop ip6
2821 * [@0]: dpo-load-balance: [index:27 buckets:1 uRPF:26 to:[0:0]]
2822 * [0] [@4]: ipv6-glean: af_packet0
2825 * [@0]: dpo-load-balance: [index:28 buckets:1 uRPF:27 to:[0:0]]
2826 * [0] [@2]: dpo-receive: @::a:1:1:0:7 on af_packet0
2829 * [@0]: dpo-load-balance: [index:26 buckets:1 uRPF:25 to:[0:0]]
2830 * [0] [@2]: dpo-receive
2831 * fe80::fe:3eff:fe3e:9222/128
2833 * [@0]: dpo-load-balance: [index:29 buckets:1 uRPF:28 to:[0:0]]
2834 * [0] [@2]: dpo-receive: fe80::fe:3eff:fe3e:9222 on af_packet0
2837 * [@0]: dpo-load-balance: [index:24 buckets:1 uRPF:23 to:[0:0]]
2838 * [0] [@2]: dpo-receive
2841 * [@0]: dpo-load-balance: [index:23 buckets:1 uRPF:22 to:[0:0]]
2842 * [0] [@2]: dpo-receive
2845 * [@0]: dpo-load-balance: [index:25 buckets:1 uRPF:24 to:[0:0]]
2846 * [0] [@2]: dpo-receive
2847 * ff02::1:ff00:0/104
2849 * [@0]: dpo-load-balance: [index:22 buckets:1 uRPF:21 to:[0:0]]
2850 * [0] [@2]: dpo-receive
2855 VLIB_CLI_COMMAND (set_ip6_flow_hash_command, static) =
2857 .path = "set ip6 flow-hash",
2859 "set ip6 flow-hash table <table-id> [src] [dst] [sport] [dport] [proto] [reverse]",
2860 .function = set_ip6_flow_hash_command_fn,
2864 static clib_error_t *
2865 show_ip6_local_command_fn (vlib_main_t * vm,
2866 unformat_input_t * input, vlib_cli_command_t * cmd)
2868 ip6_main_t *im = &ip6_main;
2869 ip_lookup_main_t *lm = &im->lookup_main;
2872 vlib_cli_output (vm, "Protocols handled by ip6_local");
2873 for (i = 0; i < ARRAY_LEN (lm->local_next_by_ip_protocol); i++)
2875 if (lm->local_next_by_ip_protocol[i] != IP_LOCAL_NEXT_PUNT)
2878 u32 node_index = vlib_get_node (vm,
2879 ip6_local_node.index)->
2880 next_nodes[lm->local_next_by_ip_protocol[i]];
2881 vlib_cli_output (vm, "%d: %U", i, format_vlib_node_name, vm,
2891 * Display the set of protocols handled by the local IPv6 stack.
2894 * Example of how to display local protocol table:
2895 * @cliexstart{show ip6 local}
2896 * Protocols handled by ip6_local
2904 VLIB_CLI_COMMAND (show_ip6_local, static) =
2906 .path = "show ip6 local",
2907 .function = show_ip6_local_command_fn,
2908 .short_help = "show ip6 local",
2913 vnet_set_ip6_classify_intfc (vlib_main_t * vm, u32 sw_if_index,
2916 vnet_main_t *vnm = vnet_get_main ();
2917 vnet_interface_main_t *im = &vnm->interface_main;
2918 ip6_main_t *ipm = &ip6_main;
2919 ip_lookup_main_t *lm = &ipm->lookup_main;
2920 vnet_classify_main_t *cm = &vnet_classify_main;
2921 ip6_address_t *if_addr;
2923 if (pool_is_free_index (im->sw_interfaces, sw_if_index))
2924 return VNET_API_ERROR_NO_MATCHING_INTERFACE;
2926 if (table_index != ~0 && pool_is_free_index (cm->tables, table_index))
2927 return VNET_API_ERROR_NO_SUCH_ENTRY;
2929 vec_validate (lm->classify_table_index_by_sw_if_index, sw_if_index);
2930 lm->classify_table_index_by_sw_if_index[sw_if_index] = table_index;
2932 if_addr = ip6_interface_first_address (ipm, sw_if_index);
2934 if (NULL != if_addr)
2936 fib_prefix_t pfx = {
2938 .fp_proto = FIB_PROTOCOL_IP6,
2939 .fp_addr.ip6 = *if_addr,
2943 fib_index = fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4,
2947 if (table_index != (u32) ~ 0)
2949 dpo_id_t dpo = DPO_INVALID;
2954 classify_dpo_create (DPO_PROTO_IP6, table_index));
2956 fib_table_entry_special_dpo_add (fib_index,
2958 FIB_SOURCE_CLASSIFY,
2959 FIB_ENTRY_FLAG_NONE, &dpo);
2964 fib_table_entry_special_remove (fib_index,
2965 &pfx, FIB_SOURCE_CLASSIFY);
2972 static clib_error_t *
2973 set_ip6_classify_command_fn (vlib_main_t * vm,
2974 unformat_input_t * input,
2975 vlib_cli_command_t * cmd)
2977 u32 table_index = ~0;
2978 int table_index_set = 0;
2979 u32 sw_if_index = ~0;
2982 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
2984 if (unformat (input, "table-index %d", &table_index))
2985 table_index_set = 1;
2986 else if (unformat (input, "intfc %U", unformat_vnet_sw_interface,
2987 vnet_get_main (), &sw_if_index))
2993 if (table_index_set == 0)
2994 return clib_error_return (0, "classify table-index must be specified");
2996 if (sw_if_index == ~0)
2997 return clib_error_return (0, "interface / subif must be specified");
2999 rv = vnet_set_ip6_classify_intfc (vm, sw_if_index, table_index);
3006 case VNET_API_ERROR_NO_MATCHING_INTERFACE:
3007 return clib_error_return (0, "No such interface");
3009 case VNET_API_ERROR_NO_SUCH_ENTRY:
3010 return clib_error_return (0, "No such classifier table");
3016 * Assign a classification table to an interface. The classification
3017 * table is created using the '<em>classify table</em>' and '<em>classify session</em>'
3018 * commands. Once the table is create, use this command to filter packets
3022 * Example of how to assign a classification table to an interface:
3023 * @cliexcmd{set ip6 classify intfc GigabitEthernet2/0/0 table-index 1}
3026 VLIB_CLI_COMMAND (set_ip6_classify_command, static) =
3028 .path = "set ip6 classify",
3030 "set ip6 classify intfc <interface> table-index <classify-idx>",
3031 .function = set_ip6_classify_command_fn,
3035 static clib_error_t *
3036 ip6_config (vlib_main_t * vm, unformat_input_t * input)
3038 ip6_main_t *im = &ip6_main;
3043 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
3045 if (unformat (input, "hash-buckets %d", &tmp))
3047 else if (unformat (input, "heap-size %U",
3048 unformat_memory_size, &heapsize))
3051 return clib_error_return (0, "unknown input '%U'",
3052 format_unformat_error, input);
3055 im->lookup_table_nbuckets = nbuckets;
3056 im->lookup_table_size = heapsize;
3061 VLIB_EARLY_CONFIG_FUNCTION (ip6_config, "ip6");
3064 * fd.io coding-style-patch-verification: ON
3067 * eval: (c-set-style "gnu")