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 vnet_buffer (p0)->ip.fib_index =
1217 vnet_buffer (p0)->sw_if_index[VLIB_TX] != ~0 ?
1218 vnet_buffer (p0)->sw_if_index[VLIB_TX] :
1219 vnet_buffer (p0)->ip.fib_index;
1221 vnet_buffer (p1)->ip.fib_index =
1222 vnet_buffer (p1)->sw_if_index[VLIB_TX] != ~0 ?
1223 vnet_buffer (p1)->sw_if_index[VLIB_TX] :
1224 vnet_buffer (p1)->ip.fib_index;
1228 next0 = lm->local_next_by_ip_protocol[ip0->protocol];
1229 next1 = lm->local_next_by_ip_protocol[ip1->protocol];
1232 error0 != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next0;
1234 error1 != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next1;
1236 p0->error = error_node->errors[error0];
1237 p1->error = error_node->errors[error1];
1239 if (head_of_feature_arc)
1241 if (PREDICT_TRUE (error0 == (u8) IP6_ERROR_UNKNOWN_PROTOCOL))
1242 vnet_feature_arc_start (arc_index,
1243 vnet_buffer (p0)->sw_if_index
1244 [VLIB_RX], &next0, p0);
1245 if (PREDICT_TRUE (error1 == (u8) IP6_ERROR_UNKNOWN_PROTOCOL))
1246 vnet_feature_arc_start (arc_index,
1247 vnet_buffer (p1)->sw_if_index
1248 [VLIB_RX], &next1, p1);
1251 vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
1252 to_next, n_left_to_next,
1253 pi0, pi1, next0, next1);
1256 while (n_left_from > 0 && n_left_to_next > 0)
1261 u32 pi0, ip_len0, udp_len0, flags0, next0;
1263 u8 error0, type0, good_l4_csum0;
1267 pi0 = to_next[0] = from[0];
1271 n_left_to_next -= 1;
1273 error0 = IP6_ERROR_UNKNOWN_PROTOCOL;
1275 p0 = vlib_get_buffer (vm, pi0);
1276 ip0 = vlib_buffer_get_current (p0);
1278 if (head_of_feature_arc == 0)
1281 vnet_buffer (p0)->l3_hdr_offset = p0->current_data;
1283 type0 = lm->builtin_protocol_by_ip_protocol[ip0->protocol];
1285 is_tcp_udp0 = ip6_next_proto_is_tcp_udp (p0, ip0, &udp_offset0);
1286 good_l4_csum0 = (flags0 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT
1287 || (flags0 & VNET_BUFFER_F_OFFLOAD_TCP_CKSUM
1288 || flags0 & VNET_BUFFER_F_OFFLOAD_UDP_CKSUM))
1292 if (PREDICT_TRUE (is_tcp_udp0))
1294 udp0 = (udp_header_t *) ((u8 *) ip0 + udp_offset0);
1295 /* Don't verify UDP checksum for packets with explicit zero
1297 good_l4_csum0 |= type0 == IP_BUILTIN_PROTOCOL_UDP
1298 && udp0->checksum == 0;
1299 /* Verify UDP length. */
1300 if (is_tcp_udp0 == IP_PROTOCOL_UDP)
1302 ip_len0 = clib_net_to_host_u16 (ip0->payload_length);
1303 udp_len0 = clib_net_to_host_u16 (udp0->length);
1304 len_diff0 = ip_len0 - udp_len0;
1308 good_l4_csum0 |= type0 == IP_BUILTIN_PROTOCOL_UNKNOWN;
1309 len_diff0 = type0 == IP_BUILTIN_PROTOCOL_UDP ? len_diff0 : 0;
1311 if (PREDICT_FALSE (type0 != IP_BUILTIN_PROTOCOL_UNKNOWN
1314 VNET_BUFFER_F_L4_CHECKSUM_COMPUTED)))
1316 flags0 = ip6_tcp_udp_icmp_validate_checksum (vm, p0);
1318 (flags0 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0;
1321 error0 = IP6_ERROR_UNKNOWN_PROTOCOL;
1322 error0 = len_diff0 < 0 ? IP6_ERROR_UDP_LENGTH : error0;
1324 ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_UDP ==
1325 IP6_ERROR_UDP_CHECKSUM);
1326 ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_ICMP ==
1327 IP6_ERROR_ICMP_CHECKSUM);
1328 error0 = (!good_l4_csum0 ? IP6_ERROR_UDP_CHECKSUM + type0 : error0);
1330 /* If this is a neighbor solicitation (ICMP), skip src RPF check */
1331 if (error0 == IP6_ERROR_UNKNOWN_PROTOCOL &&
1332 type0 != IP_BUILTIN_PROTOCOL_ICMP &&
1333 !ip6_address_is_link_local_unicast (&ip0->src_address))
1335 error0 = (!ip6_urpf_loose_check (im, p0, ip0)
1336 ? IP6_ERROR_SRC_LOOKUP_MISS : error0);
1339 vnet_buffer (p0)->ip.fib_index =
1340 vnet_buffer (p0)->sw_if_index[VLIB_TX] != ~0 ?
1341 vnet_buffer (p0)->sw_if_index[VLIB_TX] :
1342 vnet_buffer (p0)->ip.fib_index;
1346 next0 = lm->local_next_by_ip_protocol[ip0->protocol];
1348 error0 != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next0;
1350 p0->error = error_node->errors[error0];
1352 if (head_of_feature_arc)
1354 if (PREDICT_TRUE (error0 == (u8) IP6_ERROR_UNKNOWN_PROTOCOL))
1355 vnet_feature_arc_start (arc_index,
1356 vnet_buffer (p0)->sw_if_index
1357 [VLIB_RX], &next0, p0);
1360 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1361 to_next, n_left_to_next,
1365 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1368 return frame->n_vectors;
1372 ip6_local (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
1374 return ip6_local_inline (vm, node, frame, 1 /* head of feature arc */ );
1378 VLIB_REGISTER_NODE (ip6_local_node, static) =
1380 .function = ip6_local,
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",
1395 VLIB_NODE_FUNCTION_MULTIARCH (ip6_local_node, ip6_local);
1399 ip6_local_end_of_arc (vlib_main_t * vm,
1400 vlib_node_runtime_t * node, vlib_frame_t * frame)
1402 return ip6_local_inline (vm, node, frame, 0 /* head of feature arc */ );
1406 VLIB_REGISTER_NODE (ip6_local_end_of_arc_node,static) = {
1407 .function = ip6_local_end_of_arc,
1408 .name = "ip6-local-end-of-arc",
1409 .vector_size = sizeof (u32),
1411 .format_trace = format_ip6_forward_next_trace,
1412 .sibling_of = "ip6-local",
1415 VLIB_NODE_FUNCTION_MULTIARCH (ip6_local_end_of_arc_node, ip6_local_end_of_arc)
1417 VNET_FEATURE_INIT (ip6_local_end_of_arc, static) = {
1418 .arc_name = "ip6-local",
1419 .node_name = "ip6-local-end-of-arc",
1420 .runs_before = 0, /* not before any other features */
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)
1439 vnet_main_t *vnm = vnet_get_main ();
1440 ip6_main_t *im = &ip6_main;
1441 icmp6_neighbor_solicitation_header_t *h;
1443 ip_interface_address_t *ia;
1444 ip_adjacency_t *adj;
1445 vnet_hw_interface_t *hi;
1446 vnet_sw_interface_t *si;
1452 si = vnet_get_sw_interface (vnm, sw_if_index);
1454 if (!(si->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP))
1456 return clib_error_return (0, "%U: interface %U down",
1457 format_ip6_address, dst,
1458 format_vnet_sw_if_index_name, vnm,
1463 ip6_interface_address_matching_destination (im, dst, sw_if_index, &ia);
1466 vnm->api_errno = VNET_API_ERROR_NO_MATCHING_INTERFACE;
1467 return clib_error_return
1468 (0, "no matching interface address for destination %U (interface %U)",
1469 format_ip6_address, dst,
1470 format_vnet_sw_if_index_name, vnm, sw_if_index);
1474 vlib_packet_template_get_packet (vm,
1475 &im->discover_neighbor_packet_template,
1478 hi = vnet_get_sup_hw_interface (vnm, sw_if_index);
1480 /* Destination address is a solicited node multicast address. We need to fill in
1481 the low 24 bits with low 24 bits of target's address. */
1482 h->ip.dst_address.as_u8[13] = dst->as_u8[13];
1483 h->ip.dst_address.as_u8[14] = dst->as_u8[14];
1484 h->ip.dst_address.as_u8[15] = dst->as_u8[15];
1486 h->ip.src_address = src[0];
1487 h->neighbor.target_address = dst[0];
1489 if (PREDICT_FALSE (!hi->hw_address))
1491 return clib_error_return (0, "%U: interface %U do not support ip probe",
1492 format_ip6_address, dst,
1493 format_vnet_sw_if_index_name, vnm,
1497 clib_memcpy (h->link_layer_option.ethernet_address, hi->hw_address,
1498 vec_len (hi->hw_address));
1500 h->neighbor.icmp.checksum =
1501 ip6_tcp_udp_icmp_compute_checksum (vm, 0, &h->ip, &bogus_length);
1502 ASSERT (bogus_length == 0);
1504 b = vlib_get_buffer (vm, bi);
1505 vnet_buffer (b)->sw_if_index[VLIB_RX] =
1506 vnet_buffer (b)->sw_if_index[VLIB_TX] = sw_if_index;
1508 /* Add encapsulation string for software interface (e.g. ethernet header). */
1509 ip46_address_t nh = {
1513 ai = adj_nbr_add_or_lock (FIB_PROTOCOL_IP6,
1514 VNET_LINK_IP6, &nh, sw_if_index);
1517 /* Peer has been previously resolved, retrieve glean adj instead */
1518 if (adj->lookup_next_index == IP_LOOKUP_NEXT_REWRITE)
1521 ai = adj_glean_add_or_lock (FIB_PROTOCOL_IP6,
1522 VNET_LINK_IP6, sw_if_index, &nh);
1526 vnet_rewrite_one_header (adj[0], h, sizeof (ethernet_header_t));
1527 vlib_buffer_advance (b, -adj->rewrite_header.data_bytes);
1530 vlib_frame_t *f = vlib_get_frame_to_node (vm, hi->output_node_index);
1531 u32 *to_next = vlib_frame_vector_args (f);
1534 vlib_put_frame_to_node (vm, hi->output_node_index, f);
1538 return /* no error */ 0;
1543 IP6_REWRITE_NEXT_DROP,
1544 IP6_REWRITE_NEXT_ICMP_ERROR,
1545 } ip6_rewrite_next_t;
1548 * This bits of an IPv6 address to mask to construct a multicast
1551 #define IP6_MCAST_ADDR_MASK 0xffffffff
1554 ip6_mtu_check (vlib_buffer_t * b, u16 packet_bytes,
1555 u16 adj_packet_bytes, u32 * next, u32 * error)
1557 if (adj_packet_bytes >= 1280 && packet_bytes > adj_packet_bytes)
1559 *error = IP6_ERROR_MTU_EXCEEDED;
1560 icmp6_error_set_vnet_buffer (b, ICMP6_packet_too_big, 0,
1562 *next = IP6_REWRITE_NEXT_ICMP_ERROR;
1567 ip6_rewrite_inline (vlib_main_t * vm,
1568 vlib_node_runtime_t * node,
1569 vlib_frame_t * frame,
1570 int do_counters, int is_midchain, int is_mcast)
1572 ip_lookup_main_t *lm = &ip6_main.lookup_main;
1573 u32 *from = vlib_frame_vector_args (frame);
1574 u32 n_left_from, n_left_to_next, *to_next, next_index;
1575 vlib_node_runtime_t *error_node =
1576 vlib_node_get_runtime (vm, ip6_input_node.index);
1578 n_left_from = frame->n_vectors;
1579 next_index = node->cached_next_index;
1580 u32 thread_index = vlib_get_thread_index ();
1582 while (n_left_from > 0)
1584 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1586 while (n_left_from >= 4 && n_left_to_next >= 2)
1588 ip_adjacency_t *adj0, *adj1;
1589 vlib_buffer_t *p0, *p1;
1590 ip6_header_t *ip0, *ip1;
1591 u32 pi0, rw_len0, next0, error0, adj_index0;
1592 u32 pi1, rw_len1, next1, error1, adj_index1;
1593 u32 tx_sw_if_index0, tx_sw_if_index1;
1595 /* Prefetch next iteration. */
1597 vlib_buffer_t *p2, *p3;
1599 p2 = vlib_get_buffer (vm, from[2]);
1600 p3 = vlib_get_buffer (vm, from[3]);
1602 vlib_prefetch_buffer_header (p2, LOAD);
1603 vlib_prefetch_buffer_header (p3, LOAD);
1605 CLIB_PREFETCH (p2->pre_data, 32, STORE);
1606 CLIB_PREFETCH (p3->pre_data, 32, STORE);
1608 CLIB_PREFETCH (p2->data, sizeof (ip0[0]), STORE);
1609 CLIB_PREFETCH (p3->data, sizeof (ip0[0]), STORE);
1612 pi0 = to_next[0] = from[0];
1613 pi1 = to_next[1] = from[1];
1618 n_left_to_next -= 2;
1620 p0 = vlib_get_buffer (vm, pi0);
1621 p1 = vlib_get_buffer (vm, pi1);
1623 adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
1624 adj_index1 = vnet_buffer (p1)->ip.adj_index[VLIB_TX];
1626 ip0 = vlib_buffer_get_current (p0);
1627 ip1 = vlib_buffer_get_current (p1);
1629 error0 = error1 = IP6_ERROR_NONE;
1630 next0 = next1 = IP6_REWRITE_NEXT_DROP;
1632 if (PREDICT_TRUE (!(p0->flags & VNET_BUFFER_F_LOCALLY_ORIGINATED)))
1634 i32 hop_limit0 = ip0->hop_limit;
1636 /* Input node should have reject packets with hop limit 0. */
1637 ASSERT (ip0->hop_limit > 0);
1641 ip0->hop_limit = hop_limit0;
1644 * If the hop count drops below 1 when forwarding, generate
1647 if (PREDICT_FALSE (hop_limit0 <= 0))
1649 error0 = IP6_ERROR_TIME_EXPIRED;
1650 next0 = IP6_REWRITE_NEXT_ICMP_ERROR;
1651 vnet_buffer (p0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
1652 icmp6_error_set_vnet_buffer (p0, ICMP6_time_exceeded,
1653 ICMP6_time_exceeded_ttl_exceeded_in_transit,
1659 p0->flags &= ~VNET_BUFFER_F_LOCALLY_ORIGINATED;
1661 if (PREDICT_TRUE (!(p1->flags & VNET_BUFFER_F_LOCALLY_ORIGINATED)))
1663 i32 hop_limit1 = ip1->hop_limit;
1665 /* Input node should have reject packets with hop limit 0. */
1666 ASSERT (ip1->hop_limit > 0);
1670 ip1->hop_limit = hop_limit1;
1673 * If the hop count drops below 1 when forwarding, generate
1676 if (PREDICT_FALSE (hop_limit1 <= 0))
1678 error1 = IP6_ERROR_TIME_EXPIRED;
1679 next1 = IP6_REWRITE_NEXT_ICMP_ERROR;
1680 vnet_buffer (p1)->sw_if_index[VLIB_TX] = (u32) ~ 0;
1681 icmp6_error_set_vnet_buffer (p1, ICMP6_time_exceeded,
1682 ICMP6_time_exceeded_ttl_exceeded_in_transit,
1688 p1->flags &= ~VNET_BUFFER_F_LOCALLY_ORIGINATED;
1690 adj0 = adj_get (adj_index0);
1691 adj1 = adj_get (adj_index1);
1693 rw_len0 = adj0[0].rewrite_header.data_bytes;
1694 rw_len1 = adj1[0].rewrite_header.data_bytes;
1695 vnet_buffer (p0)->ip.save_rewrite_length = rw_len0;
1696 vnet_buffer (p1)->ip.save_rewrite_length = rw_len1;
1700 vlib_increment_combined_counter
1701 (&adjacency_counters,
1702 thread_index, adj_index0, 1,
1703 vlib_buffer_length_in_chain (vm, p0) + rw_len0);
1704 vlib_increment_combined_counter
1705 (&adjacency_counters,
1706 thread_index, adj_index1, 1,
1707 vlib_buffer_length_in_chain (vm, p1) + rw_len1);
1710 /* Check MTU of outgoing interface. */
1711 ip6_mtu_check (p0, clib_net_to_host_u16 (ip0->payload_length) +
1712 sizeof (ip6_header_t),
1713 adj0[0].rewrite_header.max_l3_packet_bytes,
1715 ip6_mtu_check (p1, clib_net_to_host_u16 (ip1->payload_length) +
1716 sizeof (ip6_header_t),
1717 adj1[0].rewrite_header.max_l3_packet_bytes,
1720 /* Don't adjust the buffer for hop count issue; icmp-error node
1721 * wants to see the IP headerr */
1722 if (PREDICT_TRUE (error0 == IP6_ERROR_NONE))
1724 p0->current_data -= rw_len0;
1725 p0->current_length += rw_len0;
1727 tx_sw_if_index0 = adj0[0].rewrite_header.sw_if_index;
1728 vnet_buffer (p0)->sw_if_index[VLIB_TX] = tx_sw_if_index0;
1729 next0 = adj0[0].rewrite_header.next_index;
1732 (adj0[0].rewrite_header.flags & VNET_REWRITE_HAS_FEATURES))
1733 vnet_feature_arc_start (lm->output_feature_arc_index,
1734 tx_sw_if_index0, &next0, p0);
1736 if (PREDICT_TRUE (error1 == IP6_ERROR_NONE))
1738 p1->current_data -= rw_len1;
1739 p1->current_length += rw_len1;
1741 tx_sw_if_index1 = adj1[0].rewrite_header.sw_if_index;
1742 vnet_buffer (p1)->sw_if_index[VLIB_TX] = tx_sw_if_index1;
1743 next1 = adj1[0].rewrite_header.next_index;
1746 (adj1[0].rewrite_header.flags & VNET_REWRITE_HAS_FEATURES))
1747 vnet_feature_arc_start (lm->output_feature_arc_index,
1748 tx_sw_if_index1, &next1, p1);
1751 /* Guess we are only writing on simple Ethernet header. */
1752 vnet_rewrite_two_headers (adj0[0], adj1[0],
1753 ip0, ip1, sizeof (ethernet_header_t));
1757 adj0->sub_type.midchain.fixup_func
1758 (vm, adj0, p0, adj0->sub_type.midchain.fixup_data);
1759 adj1->sub_type.midchain.fixup_func
1760 (vm, adj1, p1, adj1->sub_type.midchain.fixup_data);
1765 * copy bytes from the IP address into the MAC rewrite
1767 vnet_ip_mcast_fixup_header (IP6_MCAST_ADDR_MASK,
1769 rewrite_header.dst_mcast_offset,
1770 &ip0->dst_address.as_u32[3],
1772 vnet_ip_mcast_fixup_header (IP6_MCAST_ADDR_MASK,
1774 rewrite_header.dst_mcast_offset,
1775 &ip1->dst_address.as_u32[3],
1779 vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
1780 to_next, n_left_to_next,
1781 pi0, pi1, next0, next1);
1784 while (n_left_from > 0 && n_left_to_next > 0)
1786 ip_adjacency_t *adj0;
1790 u32 adj_index0, next0, error0;
1791 u32 tx_sw_if_index0;
1793 pi0 = to_next[0] = from[0];
1795 p0 = vlib_get_buffer (vm, pi0);
1797 adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
1799 adj0 = adj_get (adj_index0);
1801 ip0 = vlib_buffer_get_current (p0);
1803 error0 = IP6_ERROR_NONE;
1804 next0 = IP6_REWRITE_NEXT_DROP;
1806 /* Check hop limit */
1807 if (PREDICT_TRUE (!(p0->flags & VNET_BUFFER_F_LOCALLY_ORIGINATED)))
1809 i32 hop_limit0 = ip0->hop_limit;
1811 ASSERT (ip0->hop_limit > 0);
1815 ip0->hop_limit = hop_limit0;
1817 if (PREDICT_FALSE (hop_limit0 <= 0))
1820 * If the hop count drops below 1 when forwarding, generate
1823 error0 = IP6_ERROR_TIME_EXPIRED;
1824 next0 = IP6_REWRITE_NEXT_ICMP_ERROR;
1825 vnet_buffer (p0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
1826 icmp6_error_set_vnet_buffer (p0, ICMP6_time_exceeded,
1827 ICMP6_time_exceeded_ttl_exceeded_in_transit,
1833 p0->flags &= ~VNET_BUFFER_F_LOCALLY_ORIGINATED;
1836 /* Guess we are only writing on simple Ethernet header. */
1837 vnet_rewrite_one_header (adj0[0], ip0, sizeof (ethernet_header_t));
1839 /* Update packet buffer attributes/set output interface. */
1840 rw_len0 = adj0[0].rewrite_header.data_bytes;
1841 vnet_buffer (p0)->ip.save_rewrite_length = rw_len0;
1845 vlib_increment_combined_counter
1846 (&adjacency_counters,
1847 thread_index, adj_index0, 1,
1848 vlib_buffer_length_in_chain (vm, p0) + rw_len0);
1851 /* Check MTU of outgoing interface. */
1852 ip6_mtu_check (p0, clib_net_to_host_u16 (ip0->payload_length) +
1853 sizeof (ip6_header_t),
1854 adj0[0].rewrite_header.max_l3_packet_bytes,
1857 /* Don't adjust the buffer for hop count issue; icmp-error node
1858 * wants to see the IP header */
1859 if (PREDICT_TRUE (error0 == IP6_ERROR_NONE))
1861 p0->current_data -= rw_len0;
1862 p0->current_length += rw_len0;
1864 tx_sw_if_index0 = adj0[0].rewrite_header.sw_if_index;
1866 vnet_buffer (p0)->sw_if_index[VLIB_TX] = tx_sw_if_index0;
1867 next0 = adj0[0].rewrite_header.next_index;
1870 (adj0[0].rewrite_header.flags & VNET_REWRITE_HAS_FEATURES))
1871 vnet_feature_arc_start (lm->output_feature_arc_index,
1872 tx_sw_if_index0, &next0, p0);
1877 adj0->sub_type.midchain.fixup_func
1878 (vm, adj0, p0, adj0->sub_type.midchain.fixup_data);
1882 vnet_ip_mcast_fixup_header (IP6_MCAST_ADDR_MASK,
1884 rewrite_header.dst_mcast_offset,
1885 &ip0->dst_address.as_u32[3],
1889 p0->error = error_node->errors[error0];
1894 n_left_to_next -= 1;
1896 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1897 to_next, n_left_to_next,
1901 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1904 /* Need to do trace after rewrites to pick up new packet data. */
1905 if (node->flags & VLIB_NODE_FLAG_TRACE)
1906 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
1908 return frame->n_vectors;
1912 ip6_rewrite (vlib_main_t * vm,
1913 vlib_node_runtime_t * node, vlib_frame_t * frame)
1915 if (adj_are_counters_enabled ())
1916 return ip6_rewrite_inline (vm, node, frame, 1, 0, 0);
1918 return ip6_rewrite_inline (vm, node, frame, 0, 0, 0);
1922 ip6_rewrite_mcast (vlib_main_t * vm,
1923 vlib_node_runtime_t * node, vlib_frame_t * frame)
1925 if (adj_are_counters_enabled ())
1926 return ip6_rewrite_inline (vm, node, frame, 1, 0, 1);
1928 return ip6_rewrite_inline (vm, node, frame, 0, 0, 1);
1932 ip6_midchain (vlib_main_t * vm,
1933 vlib_node_runtime_t * node, vlib_frame_t * frame)
1935 if (adj_are_counters_enabled ())
1936 return ip6_rewrite_inline (vm, node, frame, 1, 1, 0);
1938 return ip6_rewrite_inline (vm, node, frame, 0, 1, 0);
1942 ip6_mcast_midchain (vlib_main_t * vm,
1943 vlib_node_runtime_t * node, vlib_frame_t * frame)
1945 if (adj_are_counters_enabled ())
1946 return ip6_rewrite_inline (vm, node, frame, 1, 1, 1);
1948 return ip6_rewrite_inline (vm, node, frame, 0, 1, 1);
1952 VLIB_REGISTER_NODE (ip6_midchain_node) =
1954 .function = ip6_midchain,
1955 .name = "ip6-midchain",
1956 .vector_size = sizeof (u32),
1957 .format_trace = format_ip6_forward_next_trace,
1958 .sibling_of = "ip6-rewrite",
1962 VLIB_NODE_FUNCTION_MULTIARCH (ip6_midchain_node, ip6_midchain);
1965 VLIB_REGISTER_NODE (ip6_rewrite_node) =
1967 .function = ip6_rewrite,
1968 .name = "ip6-rewrite",
1969 .vector_size = sizeof (u32),
1970 .format_trace = format_ip6_rewrite_trace,
1974 [IP6_REWRITE_NEXT_DROP] = "ip6-drop",
1975 [IP6_REWRITE_NEXT_ICMP_ERROR] = "ip6-icmp-error",
1980 VLIB_NODE_FUNCTION_MULTIARCH (ip6_rewrite_node, ip6_rewrite);
1983 VLIB_REGISTER_NODE (ip6_rewrite_mcast_node) =
1985 .function = ip6_rewrite_mcast,
1986 .name = "ip6-rewrite-mcast",
1987 .vector_size = sizeof (u32),
1988 .format_trace = format_ip6_rewrite_trace,
1989 .sibling_of = "ip6-rewrite",
1993 VLIB_NODE_FUNCTION_MULTIARCH (ip6_rewrite_mcast_node, ip6_rewrite_mcast);
1996 VLIB_REGISTER_NODE (ip6_mcast_midchain_node, static) =
1998 .function = ip6_mcast_midchain,
1999 .name = "ip6-mcast-midchain",
2000 .vector_size = sizeof (u32),
2001 .format_trace = format_ip6_rewrite_trace,
2002 .sibling_of = "ip6-rewrite",
2006 VLIB_NODE_FUNCTION_MULTIARCH (ip6_mcast_midchain_node, ip6_mcast_midchain);
2009 * Hop-by-Hop handling
2011 ip6_hop_by_hop_main_t ip6_hop_by_hop_main;
2013 #define foreach_ip6_hop_by_hop_error \
2014 _(PROCESSED, "pkts with ip6 hop-by-hop options") \
2015 _(FORMAT, "incorrectly formatted hop-by-hop options") \
2016 _(UNKNOWN_OPTION, "unknown ip6 hop-by-hop options")
2021 #define _(sym,str) IP6_HOP_BY_HOP_ERROR_##sym,
2022 foreach_ip6_hop_by_hop_error
2024 IP6_HOP_BY_HOP_N_ERROR,
2025 } ip6_hop_by_hop_error_t;
2029 * Primary h-b-h handler trace support
2030 * We work pretty hard on the problem for obvious reasons
2036 u8 option_data[256];
2037 } ip6_hop_by_hop_trace_t;
2039 vlib_node_registration_t ip6_hop_by_hop_node;
2041 static char *ip6_hop_by_hop_error_strings[] = {
2042 #define _(sym,string) string,
2043 foreach_ip6_hop_by_hop_error
2048 format_ip6_hop_by_hop_ext_hdr (u8 * s, va_list * args)
2050 ip6_hop_by_hop_header_t *hbh0 = va_arg (*args, ip6_hop_by_hop_header_t *);
2051 int total_len = va_arg (*args, int);
2052 ip6_hop_by_hop_option_t *opt0, *limit0;
2053 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2056 s = format (s, "IP6_HOP_BY_HOP: next protocol %d len %d total %d",
2057 hbh0->protocol, (hbh0->length + 1) << 3, total_len);
2059 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2060 limit0 = (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 + total_len);
2062 while (opt0 < limit0)
2067 case 0: /* Pad, just stop */
2068 opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0 + 1);
2072 if (hm->trace[type0])
2074 s = (*hm->trace[type0]) (s, opt0);
2079 format (s, "\n unrecognized option %d length %d", type0,
2083 (ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length +
2084 sizeof (ip6_hop_by_hop_option_t));
2092 format_ip6_hop_by_hop_trace (u8 * s, va_list * args)
2094 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
2095 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
2096 ip6_hop_by_hop_trace_t *t = va_arg (*args, ip6_hop_by_hop_trace_t *);
2097 ip6_hop_by_hop_header_t *hbh0;
2098 ip6_hop_by_hop_option_t *opt0, *limit0;
2099 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2103 hbh0 = (ip6_hop_by_hop_header_t *) t->option_data;
2105 s = format (s, "IP6_HOP_BY_HOP: next index %d len %d traced %d",
2106 t->next_index, (hbh0->length + 1) << 3, t->trace_len);
2108 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2109 limit0 = (ip6_hop_by_hop_option_t *) ((u8 *) hbh0) + t->trace_len;
2111 while (opt0 < limit0)
2116 case 0: /* Pad, just stop */
2117 opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0) + 1;
2121 if (hm->trace[type0])
2123 s = (*hm->trace[type0]) (s, opt0);
2128 format (s, "\n unrecognized option %d length %d", type0,
2132 (ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length +
2133 sizeof (ip6_hop_by_hop_option_t));
2141 ip6_scan_hbh_options (vlib_buffer_t * b0,
2143 ip6_hop_by_hop_header_t * hbh0,
2144 ip6_hop_by_hop_option_t * opt0,
2145 ip6_hop_by_hop_option_t * limit0, u32 * next0)
2147 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2151 while (opt0 < limit0)
2157 opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0) + 1;
2162 if (hm->options[type0])
2164 if ((*hm->options[type0]) (b0, ip0, opt0) < 0)
2166 error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2172 /* Unrecognized mandatory option, check the two high order bits */
2173 switch (opt0->type & HBH_OPTION_TYPE_HIGH_ORDER_BITS)
2175 case HBH_OPTION_TYPE_SKIP_UNKNOWN:
2177 case HBH_OPTION_TYPE_DISCARD_UNKNOWN:
2178 error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2179 *next0 = IP_LOOKUP_NEXT_DROP;
2181 case HBH_OPTION_TYPE_DISCARD_UNKNOWN_ICMP:
2182 error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2183 *next0 = IP_LOOKUP_NEXT_ICMP_ERROR;
2184 icmp6_error_set_vnet_buffer (b0, ICMP6_parameter_problem,
2185 ICMP6_parameter_problem_unrecognized_option,
2186 (u8 *) opt0 - (u8 *) ip0);
2188 case HBH_OPTION_TYPE_DISCARD_UNKNOWN_ICMP_NOT_MCAST:
2189 error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2190 if (!ip6_address_is_multicast (&ip0->dst_address))
2192 *next0 = IP_LOOKUP_NEXT_ICMP_ERROR;
2193 icmp6_error_set_vnet_buffer (b0,
2194 ICMP6_parameter_problem,
2195 ICMP6_parameter_problem_unrecognized_option,
2196 (u8 *) opt0 - (u8 *) ip0);
2200 *next0 = IP_LOOKUP_NEXT_DROP;
2208 (ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length +
2209 sizeof (ip6_hop_by_hop_option_t));
2215 * Process the Hop-by-Hop Options header
2218 ip6_hop_by_hop (vlib_main_t * vm,
2219 vlib_node_runtime_t * node, vlib_frame_t * frame)
2221 vlib_node_runtime_t *error_node =
2222 vlib_node_get_runtime (vm, ip6_hop_by_hop_node.index);
2223 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2224 u32 n_left_from, *from, *to_next;
2225 ip_lookup_next_t next_index;
2227 from = vlib_frame_vector_args (frame);
2228 n_left_from = frame->n_vectors;
2229 next_index = node->cached_next_index;
2231 while (n_left_from > 0)
2235 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
2237 while (n_left_from >= 4 && n_left_to_next >= 2)
2240 vlib_buffer_t *b0, *b1;
2242 ip6_header_t *ip0, *ip1;
2243 ip6_hop_by_hop_header_t *hbh0, *hbh1;
2244 ip6_hop_by_hop_option_t *opt0, *limit0, *opt1, *limit1;
2245 u8 error0 = 0, error1 = 0;
2247 /* Prefetch next iteration. */
2249 vlib_buffer_t *p2, *p3;
2251 p2 = vlib_get_buffer (vm, from[2]);
2252 p3 = vlib_get_buffer (vm, from[3]);
2254 vlib_prefetch_buffer_header (p2, LOAD);
2255 vlib_prefetch_buffer_header (p3, LOAD);
2257 CLIB_PREFETCH (p2->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
2258 CLIB_PREFETCH (p3->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
2261 /* Speculatively enqueue b0, b1 to the current next frame */
2262 to_next[0] = bi0 = from[0];
2263 to_next[1] = bi1 = from[1];
2267 n_left_to_next -= 2;
2269 b0 = vlib_get_buffer (vm, bi0);
2270 b1 = vlib_get_buffer (vm, bi1);
2272 /* Default use the next_index from the adjacency. A HBH option rarely redirects to a different node */
2273 u32 adj_index0 = vnet_buffer (b0)->ip.adj_index[VLIB_TX];
2274 ip_adjacency_t *adj0 = adj_get (adj_index0);
2275 u32 adj_index1 = vnet_buffer (b1)->ip.adj_index[VLIB_TX];
2276 ip_adjacency_t *adj1 = adj_get (adj_index1);
2278 /* Default use the next_index from the adjacency. A HBH option rarely redirects to a different node */
2279 next0 = adj0->lookup_next_index;
2280 next1 = adj1->lookup_next_index;
2282 ip0 = vlib_buffer_get_current (b0);
2283 ip1 = vlib_buffer_get_current (b1);
2284 hbh0 = (ip6_hop_by_hop_header_t *) (ip0 + 1);
2285 hbh1 = (ip6_hop_by_hop_header_t *) (ip1 + 1);
2286 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2287 opt1 = (ip6_hop_by_hop_option_t *) (hbh1 + 1);
2289 (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 +
2290 ((hbh0->length + 1) << 3));
2292 (ip6_hop_by_hop_option_t *) ((u8 *) hbh1 +
2293 ((hbh1->length + 1) << 3));
2296 * Basic validity checks
2298 if ((hbh0->length + 1) << 3 >
2299 clib_net_to_host_u16 (ip0->payload_length))
2301 error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2302 next0 = IP_LOOKUP_NEXT_DROP;
2305 /* Scan the set of h-b-h options, process ones that we understand */
2306 error0 = ip6_scan_hbh_options (b0, ip0, hbh0, opt0, limit0, &next0);
2308 if ((hbh1->length + 1) << 3 >
2309 clib_net_to_host_u16 (ip1->payload_length))
2311 error1 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2312 next1 = IP_LOOKUP_NEXT_DROP;
2315 /* Scan the set of h-b-h options, process ones that we understand */
2316 error1 = ip6_scan_hbh_options (b1, ip1, hbh1, opt1, limit1, &next1);
2319 /* Has the classifier flagged this buffer for special treatment? */
2322 && (vnet_buffer (b0)->l2_classify.opaque_index & OI_DECAP)))
2323 next0 = hm->next_override;
2325 /* Has the classifier flagged this buffer for special treatment? */
2328 && (vnet_buffer (b1)->l2_classify.opaque_index & OI_DECAP)))
2329 next1 = hm->next_override;
2331 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)))
2333 if (b0->flags & VLIB_BUFFER_IS_TRACED)
2335 ip6_hop_by_hop_trace_t *t =
2336 vlib_add_trace (vm, node, b0, sizeof (*t));
2337 u32 trace_len = (hbh0->length + 1) << 3;
2338 t->next_index = next0;
2339 /* Capture the h-b-h option verbatim */
2342 ARRAY_LEN (t->option_data) ? trace_len :
2343 ARRAY_LEN (t->option_data);
2344 t->trace_len = trace_len;
2345 clib_memcpy (t->option_data, hbh0, trace_len);
2347 if (b1->flags & VLIB_BUFFER_IS_TRACED)
2349 ip6_hop_by_hop_trace_t *t =
2350 vlib_add_trace (vm, node, b1, sizeof (*t));
2351 u32 trace_len = (hbh1->length + 1) << 3;
2352 t->next_index = next1;
2353 /* Capture the h-b-h option verbatim */
2356 ARRAY_LEN (t->option_data) ? trace_len :
2357 ARRAY_LEN (t->option_data);
2358 t->trace_len = trace_len;
2359 clib_memcpy (t->option_data, hbh1, trace_len);
2364 b0->error = error_node->errors[error0];
2365 b1->error = error_node->errors[error1];
2367 /* verify speculative enqueue, maybe switch current next frame */
2368 vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
2369 n_left_to_next, bi0, bi1, next0,
2373 while (n_left_from > 0 && n_left_to_next > 0)
2379 ip6_hop_by_hop_header_t *hbh0;
2380 ip6_hop_by_hop_option_t *opt0, *limit0;
2383 /* Speculatively enqueue b0 to the current next frame */
2389 n_left_to_next -= 1;
2391 b0 = vlib_get_buffer (vm, bi0);
2393 * Default use the next_index from the adjacency.
2394 * A HBH option rarely redirects to a different node
2396 u32 adj_index0 = vnet_buffer (b0)->ip.adj_index[VLIB_TX];
2397 ip_adjacency_t *adj0 = adj_get (adj_index0);
2398 next0 = adj0->lookup_next_index;
2400 ip0 = vlib_buffer_get_current (b0);
2401 hbh0 = (ip6_hop_by_hop_header_t *) (ip0 + 1);
2402 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2404 (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 +
2405 ((hbh0->length + 1) << 3));
2408 * Basic validity checks
2410 if ((hbh0->length + 1) << 3 >
2411 clib_net_to_host_u16 (ip0->payload_length))
2413 error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2414 next0 = IP_LOOKUP_NEXT_DROP;
2418 /* Scan the set of h-b-h options, process ones that we understand */
2419 error0 = ip6_scan_hbh_options (b0, ip0, hbh0, opt0, limit0, &next0);
2422 /* Has the classifier flagged this buffer for special treatment? */
2425 && (vnet_buffer (b0)->l2_classify.opaque_index & OI_DECAP)))
2426 next0 = hm->next_override;
2428 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
2430 ip6_hop_by_hop_trace_t *t =
2431 vlib_add_trace (vm, node, b0, sizeof (*t));
2432 u32 trace_len = (hbh0->length + 1) << 3;
2433 t->next_index = next0;
2434 /* Capture the h-b-h option verbatim */
2437 ARRAY_LEN (t->option_data) ? trace_len :
2438 ARRAY_LEN (t->option_data);
2439 t->trace_len = trace_len;
2440 clib_memcpy (t->option_data, hbh0, trace_len);
2443 b0->error = error_node->errors[error0];
2445 /* verify speculative enqueue, maybe switch current next frame */
2446 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
2447 n_left_to_next, bi0, next0);
2449 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2451 return frame->n_vectors;
2455 VLIB_REGISTER_NODE (ip6_hop_by_hop_node) =
2457 .function = ip6_hop_by_hop,
2458 .name = "ip6-hop-by-hop",
2459 .sibling_of = "ip6-lookup",
2460 .vector_size = sizeof (u32),
2461 .format_trace = format_ip6_hop_by_hop_trace,
2462 .type = VLIB_NODE_TYPE_INTERNAL,
2463 .n_errors = ARRAY_LEN (ip6_hop_by_hop_error_strings),
2464 .error_strings = ip6_hop_by_hop_error_strings,
2469 VLIB_NODE_FUNCTION_MULTIARCH (ip6_hop_by_hop_node, ip6_hop_by_hop);
2471 static clib_error_t *
2472 ip6_hop_by_hop_init (vlib_main_t * vm)
2474 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2475 memset (hm->options, 0, sizeof (hm->options));
2476 memset (hm->trace, 0, sizeof (hm->trace));
2477 hm->next_override = IP6_LOOKUP_NEXT_POP_HOP_BY_HOP;
2481 VLIB_INIT_FUNCTION (ip6_hop_by_hop_init);
2484 ip6_hbh_set_next_override (uword next)
2486 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2488 hm->next_override = next;
2492 ip6_hbh_register_option (u8 option,
2493 int options (vlib_buffer_t * b, ip6_header_t * ip,
2494 ip6_hop_by_hop_option_t * opt),
2495 u8 * trace (u8 * s, ip6_hop_by_hop_option_t * opt))
2497 ip6_main_t *im = &ip6_main;
2498 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2500 ASSERT ((u32) option < ARRAY_LEN (hm->options));
2502 /* Already registered */
2503 if (hm->options[option])
2506 hm->options[option] = options;
2507 hm->trace[option] = trace;
2509 /* Set global variable */
2510 im->hbh_enabled = 1;
2516 ip6_hbh_unregister_option (u8 option)
2518 ip6_main_t *im = &ip6_main;
2519 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2521 ASSERT ((u32) option < ARRAY_LEN (hm->options));
2523 /* Not registered */
2524 if (!hm->options[option])
2527 hm->options[option] = NULL;
2528 hm->trace[option] = NULL;
2530 /* Disable global knob if this was the last option configured */
2533 for (i = 0; i < 256; i++)
2535 if (hm->options[option])
2542 im->hbh_enabled = 0;
2547 /* Global IP6 main. */
2548 ip6_main_t ip6_main;
2550 static clib_error_t *
2551 ip6_lookup_init (vlib_main_t * vm)
2553 ip6_main_t *im = &ip6_main;
2554 clib_error_t *error;
2557 if ((error = vlib_call_init_function (vm, vnet_feature_init)))
2560 for (i = 0; i < ARRAY_LEN (im->fib_masks); i++)
2567 for (j = 0; j < i0; j++)
2568 im->fib_masks[i].as_u32[j] = ~0;
2571 im->fib_masks[i].as_u32[i0] =
2572 clib_host_to_net_u32 (pow2_mask (i1) << (32 - i1));
2575 ip_lookup_init (&im->lookup_main, /* is_ip6 */ 1);
2577 if (im->lookup_table_nbuckets == 0)
2578 im->lookup_table_nbuckets = IP6_FIB_DEFAULT_HASH_NUM_BUCKETS;
2580 im->lookup_table_nbuckets = 1 << max_log2 (im->lookup_table_nbuckets);
2582 if (im->lookup_table_size == 0)
2583 im->lookup_table_size = IP6_FIB_DEFAULT_HASH_MEMORY_SIZE;
2585 BV (clib_bihash_init) (&(im->ip6_table[IP6_FIB_TABLE_FWDING].ip6_hash),
2586 "ip6 FIB fwding table",
2587 im->lookup_table_nbuckets, im->lookup_table_size);
2588 BV (clib_bihash_init) (&im->ip6_table[IP6_FIB_TABLE_NON_FWDING].ip6_hash,
2589 "ip6 FIB non-fwding table",
2590 im->lookup_table_nbuckets, im->lookup_table_size);
2592 /* Create FIB with index 0 and table id of 0. */
2593 fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6, 0,
2594 FIB_SOURCE_DEFAULT_ROUTE);
2595 mfib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6, 0,
2596 MFIB_SOURCE_DEFAULT_ROUTE);
2600 pn = pg_get_node (ip6_lookup_node.index);
2601 pn->unformat_edit = unformat_pg_ip6_header;
2604 /* Unless explicitly configured, don't process HBH options */
2605 im->hbh_enabled = 0;
2608 icmp6_neighbor_solicitation_header_t p;
2610 memset (&p, 0, sizeof (p));
2612 p.ip.ip_version_traffic_class_and_flow_label =
2613 clib_host_to_net_u32 (0x6 << 28);
2614 p.ip.payload_length =
2615 clib_host_to_net_u16 (sizeof (p) -
2617 (icmp6_neighbor_solicitation_header_t, neighbor));
2618 p.ip.protocol = IP_PROTOCOL_ICMP6;
2619 p.ip.hop_limit = 255;
2620 ip6_set_solicited_node_multicast_address (&p.ip.dst_address, 0);
2622 p.neighbor.icmp.type = ICMP6_neighbor_solicitation;
2624 p.link_layer_option.header.type =
2625 ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address;
2626 p.link_layer_option.header.n_data_u64s =
2627 sizeof (p.link_layer_option) / sizeof (u64);
2629 vlib_packet_template_init (vm,
2630 &im->discover_neighbor_packet_template,
2632 /* alloc chunk size */ 8,
2633 "ip6 neighbor discovery");
2639 VLIB_INIT_FUNCTION (ip6_lookup_init);
2642 ip6_link_local_address_from_ethernet_mac_address (ip6_address_t * ip,
2645 ip->as_u64[0] = clib_host_to_net_u64 (0xFE80000000000000ULL);
2646 /* Invert the "u" bit */
2647 ip->as_u8[8] = mac[0] ^ (1 << 1);
2648 ip->as_u8[9] = mac[1];
2649 ip->as_u8[10] = mac[2];
2650 ip->as_u8[11] = 0xFF;
2651 ip->as_u8[12] = 0xFE;
2652 ip->as_u8[13] = mac[3];
2653 ip->as_u8[14] = mac[4];
2654 ip->as_u8[15] = mac[5];
2658 ip6_ethernet_mac_address_from_link_local_address (u8 * mac,
2661 /* Invert the previously inverted "u" bit */
2662 mac[0] = ip->as_u8[8] ^ (1 << 1);
2663 mac[1] = ip->as_u8[9];
2664 mac[2] = ip->as_u8[10];
2665 mac[3] = ip->as_u8[13];
2666 mac[4] = ip->as_u8[14];
2667 mac[5] = ip->as_u8[15];
2670 static clib_error_t *
2671 test_ip6_link_command_fn (vlib_main_t * vm,
2672 unformat_input_t * input, vlib_cli_command_t * cmd)
2675 ip6_address_t _a, *a = &_a;
2677 if (unformat (input, "%U", unformat_ethernet_address, mac))
2679 ip6_link_local_address_from_ethernet_mac_address (a, mac);
2680 vlib_cli_output (vm, "Link local address: %U", format_ip6_address, a);
2681 ip6_ethernet_mac_address_from_link_local_address (mac, a);
2682 vlib_cli_output (vm, "Original MAC address: %U",
2683 format_ethernet_address, mac);
2690 * This command converts the given MAC Address into an IPv6 link-local
2694 * Example of how to create an IPv6 link-local address:
2695 * @cliexstart{test ip6 link 16:d9:e0:91:79:86}
2696 * Link local address: fe80::14d9:e0ff:fe91:7986
2697 * Original MAC address: 16:d9:e0:91:79:86
2701 VLIB_CLI_COMMAND (test_link_command, static) =
2703 .path = "test ip6 link",
2704 .function = test_ip6_link_command_fn,
2705 .short_help = "test ip6 link <mac-address>",
2710 vnet_set_ip6_flow_hash (u32 table_id, u32 flow_hash_config)
2714 fib_index = fib_table_find (FIB_PROTOCOL_IP6, table_id);
2716 if (~0 == fib_index)
2717 return VNET_API_ERROR_NO_SUCH_FIB;
2719 fib_table_set_flow_hash_config (fib_index, FIB_PROTOCOL_IP6,
2725 static clib_error_t *
2726 set_ip6_flow_hash_command_fn (vlib_main_t * vm,
2727 unformat_input_t * input,
2728 vlib_cli_command_t * cmd)
2732 u32 flow_hash_config = 0;
2735 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
2737 if (unformat (input, "table %d", &table_id))
2740 else if (unformat (input, #a)) { flow_hash_config |= v; matched=1;}
2741 foreach_flow_hash_bit
2748 return clib_error_return (0, "unknown input `%U'",
2749 format_unformat_error, input);
2751 rv = vnet_set_ip6_flow_hash (table_id, flow_hash_config);
2758 return clib_error_return (0, "no such FIB table %d", table_id);
2761 clib_warning ("BUG: illegal flow hash config 0x%x", flow_hash_config);
2769 * Configure the set of IPv6 fields used by the flow hash.
2773 * Example of how to set the flow hash on a given table:
2774 * @cliexcmd{set ip6 flow-hash table 8 dst sport dport proto}
2776 * Example of display the configured flow hash:
2777 * @cliexstart{show ip6 fib}
2778 * ipv6-VRF:0, fib_index 0, flow hash: src dst sport dport proto
2781 * [@0]: dpo-load-balance: [index:5 buckets:1 uRPF:5 to:[0:0]]
2782 * [0] [@0]: dpo-drop ip6
2785 * [@0]: dpo-load-balance: [index:10 buckets:1 uRPF:10 to:[0:0]]
2786 * [0] [@2]: dpo-receive
2789 * [@0]: dpo-load-balance: [index:8 buckets:1 uRPF:8 to:[0:0]]
2790 * [0] [@2]: dpo-receive
2793 * [@0]: dpo-load-balance: [index:7 buckets:1 uRPF:7 to:[0:0]]
2794 * [0] [@2]: dpo-receive
2797 * [@0]: dpo-load-balance: [index:9 buckets:1 uRPF:9 to:[0:0]]
2798 * [0] [@2]: dpo-receive
2799 * ff02::1:ff00:0/104
2801 * [@0]: dpo-load-balance: [index:6 buckets:1 uRPF:6 to:[0:0]]
2802 * [0] [@2]: dpo-receive
2803 * ipv6-VRF:8, fib_index 1, flow hash: dst sport dport proto
2806 * [@0]: dpo-load-balance: [index:21 buckets:1 uRPF:20 to:[0:0]]
2807 * [0] [@0]: dpo-drop ip6
2810 * [@0]: dpo-load-balance: [index:27 buckets:1 uRPF:26 to:[0:0]]
2811 * [0] [@4]: ipv6-glean: af_packet0
2814 * [@0]: dpo-load-balance: [index:28 buckets:1 uRPF:27 to:[0:0]]
2815 * [0] [@2]: dpo-receive: @::a:1:1:0:7 on af_packet0
2818 * [@0]: dpo-load-balance: [index:26 buckets:1 uRPF:25 to:[0:0]]
2819 * [0] [@2]: dpo-receive
2820 * fe80::fe:3eff:fe3e:9222/128
2822 * [@0]: dpo-load-balance: [index:29 buckets:1 uRPF:28 to:[0:0]]
2823 * [0] [@2]: dpo-receive: fe80::fe:3eff:fe3e:9222 on af_packet0
2826 * [@0]: dpo-load-balance: [index:24 buckets:1 uRPF:23 to:[0:0]]
2827 * [0] [@2]: dpo-receive
2830 * [@0]: dpo-load-balance: [index:23 buckets:1 uRPF:22 to:[0:0]]
2831 * [0] [@2]: dpo-receive
2834 * [@0]: dpo-load-balance: [index:25 buckets:1 uRPF:24 to:[0:0]]
2835 * [0] [@2]: dpo-receive
2836 * ff02::1:ff00:0/104
2838 * [@0]: dpo-load-balance: [index:22 buckets:1 uRPF:21 to:[0:0]]
2839 * [0] [@2]: dpo-receive
2844 VLIB_CLI_COMMAND (set_ip6_flow_hash_command, static) =
2846 .path = "set ip6 flow-hash",
2848 "set ip6 flow-hash table <table-id> [src] [dst] [sport] [dport] [proto] [reverse]",
2849 .function = set_ip6_flow_hash_command_fn,
2853 static clib_error_t *
2854 show_ip6_local_command_fn (vlib_main_t * vm,
2855 unformat_input_t * input, vlib_cli_command_t * cmd)
2857 ip6_main_t *im = &ip6_main;
2858 ip_lookup_main_t *lm = &im->lookup_main;
2861 vlib_cli_output (vm, "Protocols handled by ip6_local");
2862 for (i = 0; i < ARRAY_LEN (lm->local_next_by_ip_protocol); i++)
2864 if (lm->local_next_by_ip_protocol[i] != IP_LOCAL_NEXT_PUNT)
2867 u32 node_index = vlib_get_node (vm,
2868 ip6_local_node.index)->
2869 next_nodes[lm->local_next_by_ip_protocol[i]];
2870 vlib_cli_output (vm, "%d: %U", i, format_vlib_node_name, vm,
2880 * Display the set of protocols handled by the local IPv6 stack.
2883 * Example of how to display local protocol table:
2884 * @cliexstart{show ip6 local}
2885 * Protocols handled by ip6_local
2893 VLIB_CLI_COMMAND (show_ip6_local, static) =
2895 .path = "show ip6 local",
2896 .function = show_ip6_local_command_fn,
2897 .short_help = "show ip6 local",
2902 vnet_set_ip6_classify_intfc (vlib_main_t * vm, u32 sw_if_index,
2905 vnet_main_t *vnm = vnet_get_main ();
2906 vnet_interface_main_t *im = &vnm->interface_main;
2907 ip6_main_t *ipm = &ip6_main;
2908 ip_lookup_main_t *lm = &ipm->lookup_main;
2909 vnet_classify_main_t *cm = &vnet_classify_main;
2910 ip6_address_t *if_addr;
2912 if (pool_is_free_index (im->sw_interfaces, sw_if_index))
2913 return VNET_API_ERROR_NO_MATCHING_INTERFACE;
2915 if (table_index != ~0 && pool_is_free_index (cm->tables, table_index))
2916 return VNET_API_ERROR_NO_SUCH_ENTRY;
2918 vec_validate (lm->classify_table_index_by_sw_if_index, sw_if_index);
2919 lm->classify_table_index_by_sw_if_index[sw_if_index] = table_index;
2921 if_addr = ip6_interface_first_address (ipm, sw_if_index);
2923 if (NULL != if_addr)
2925 fib_prefix_t pfx = {
2927 .fp_proto = FIB_PROTOCOL_IP6,
2928 .fp_addr.ip6 = *if_addr,
2932 fib_index = fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4,
2936 if (table_index != (u32) ~ 0)
2938 dpo_id_t dpo = DPO_INVALID;
2943 classify_dpo_create (DPO_PROTO_IP6, table_index));
2945 fib_table_entry_special_dpo_add (fib_index,
2947 FIB_SOURCE_CLASSIFY,
2948 FIB_ENTRY_FLAG_NONE, &dpo);
2953 fib_table_entry_special_remove (fib_index,
2954 &pfx, FIB_SOURCE_CLASSIFY);
2961 static clib_error_t *
2962 set_ip6_classify_command_fn (vlib_main_t * vm,
2963 unformat_input_t * input,
2964 vlib_cli_command_t * cmd)
2966 u32 table_index = ~0;
2967 int table_index_set = 0;
2968 u32 sw_if_index = ~0;
2971 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
2973 if (unformat (input, "table-index %d", &table_index))
2974 table_index_set = 1;
2975 else if (unformat (input, "intfc %U", unformat_vnet_sw_interface,
2976 vnet_get_main (), &sw_if_index))
2982 if (table_index_set == 0)
2983 return clib_error_return (0, "classify table-index must be specified");
2985 if (sw_if_index == ~0)
2986 return clib_error_return (0, "interface / subif must be specified");
2988 rv = vnet_set_ip6_classify_intfc (vm, sw_if_index, table_index);
2995 case VNET_API_ERROR_NO_MATCHING_INTERFACE:
2996 return clib_error_return (0, "No such interface");
2998 case VNET_API_ERROR_NO_SUCH_ENTRY:
2999 return clib_error_return (0, "No such classifier table");
3005 * Assign a classification table to an interface. The classification
3006 * table is created using the '<em>classify table</em>' and '<em>classify session</em>'
3007 * commands. Once the table is create, use this command to filter packets
3011 * Example of how to assign a classification table to an interface:
3012 * @cliexcmd{set ip6 classify intfc GigabitEthernet2/0/0 table-index 1}
3015 VLIB_CLI_COMMAND (set_ip6_classify_command, static) =
3017 .path = "set ip6 classify",
3019 "set ip6 classify intfc <interface> table-index <classify-idx>",
3020 .function = set_ip6_classify_command_fn,
3024 static clib_error_t *
3025 ip6_config (vlib_main_t * vm, unformat_input_t * input)
3027 ip6_main_t *im = &ip6_main;
3032 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
3034 if (unformat (input, "hash-buckets %d", &tmp))
3036 else if (unformat (input, "heap-size %U",
3037 unformat_memory_size, &heapsize))
3040 return clib_error_return (0, "unknown input '%U'",
3041 format_unformat_error, input);
3044 im->lookup_table_nbuckets = nbuckets;
3045 im->lookup_table_size = heapsize;
3050 VLIB_EARLY_CONFIG_FUNCTION (ip6_config, "ip6");
3053 * fd.io coding-style-patch-verification: ON
3056 * eval: (c-set-style "gnu")