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/ethernet/ethernet.h> /* for ethernet_header_t */
43 #include <vnet/srp/srp.h> /* for srp_hw_interface_class */
44 #include <vppinfra/cache.h>
45 #include <vnet/fib/ip6_fib.h>
46 #include <vnet/mfib/ip6_mfib.h>
47 #include <vnet/dpo/load_balance.h>
48 #include <vnet/dpo/classify_dpo.h>
50 #include <vppinfra/bihash_template.c>
54 * @brief IPv6 Forwarding.
56 * This file contains the source code for IPv6 forwarding.
60 ip6_forward_next_trace (vlib_main_t * vm,
61 vlib_node_runtime_t * node,
63 vlib_rx_or_tx_t which_adj_index);
66 ip6_lookup_inline (vlib_main_t * vm,
67 vlib_node_runtime_t * node, vlib_frame_t * frame)
69 ip6_main_t *im = &ip6_main;
70 vlib_combined_counter_main_t *cm = &load_balance_main.lbm_to_counters;
71 u32 n_left_from, n_left_to_next, *from, *to_next;
72 ip_lookup_next_t next;
73 u32 cpu_index = os_get_cpu_number ();
75 from = vlib_frame_vector_args (frame);
76 n_left_from = frame->n_vectors;
77 next = node->cached_next_index;
79 while (n_left_from > 0)
81 vlib_get_next_frame (vm, node, next, to_next, n_left_to_next);
83 while (n_left_from >= 4 && n_left_to_next >= 2)
85 vlib_buffer_t *p0, *p1;
86 u32 pi0, pi1, lbi0, lbi1, wrong_next;
87 ip_lookup_next_t next0, next1;
88 ip6_header_t *ip0, *ip1;
89 ip6_address_t *dst_addr0, *dst_addr1;
90 u32 fib_index0, fib_index1;
91 u32 flow_hash_config0, flow_hash_config1;
92 const dpo_id_t *dpo0, *dpo1;
93 const load_balance_t *lb0, *lb1;
95 /* Prefetch next iteration. */
97 vlib_buffer_t *p2, *p3;
99 p2 = vlib_get_buffer (vm, from[2]);
100 p3 = vlib_get_buffer (vm, from[3]);
102 vlib_prefetch_buffer_header (p2, LOAD);
103 vlib_prefetch_buffer_header (p3, LOAD);
104 CLIB_PREFETCH (p2->data, sizeof (ip0[0]), LOAD);
105 CLIB_PREFETCH (p3->data, sizeof (ip0[0]), LOAD);
108 pi0 = to_next[0] = from[0];
109 pi1 = to_next[1] = from[1];
111 p0 = vlib_get_buffer (vm, pi0);
112 p1 = vlib_get_buffer (vm, pi1);
114 ip0 = vlib_buffer_get_current (p0);
115 ip1 = vlib_buffer_get_current (p1);
117 dst_addr0 = &ip0->dst_address;
118 dst_addr1 = &ip1->dst_address;
121 vec_elt (im->fib_index_by_sw_if_index,
122 vnet_buffer (p0)->sw_if_index[VLIB_RX]);
124 vec_elt (im->fib_index_by_sw_if_index,
125 vnet_buffer (p1)->sw_if_index[VLIB_RX]);
127 fib_index0 = (vnet_buffer (p0)->sw_if_index[VLIB_TX] == (u32) ~ 0) ?
128 fib_index0 : vnet_buffer (p0)->sw_if_index[VLIB_TX];
129 fib_index1 = (vnet_buffer (p1)->sw_if_index[VLIB_TX] == (u32) ~ 0) ?
130 fib_index1 : vnet_buffer (p1)->sw_if_index[VLIB_TX];
132 lbi0 = ip6_fib_table_fwding_lookup (im, fib_index0, dst_addr0);
133 lbi1 = ip6_fib_table_fwding_lookup (im, fib_index1, dst_addr1);
135 lb0 = load_balance_get (lbi0);
136 lb1 = load_balance_get (lbi1);
138 vnet_buffer (p0)->ip.flow_hash = vnet_buffer (p1)->ip.flow_hash = 0;
140 if (PREDICT_FALSE (lb0->lb_n_buckets > 1))
142 flow_hash_config0 = lb0->lb_hash_config;
143 vnet_buffer (p0)->ip.flow_hash =
144 ip6_compute_flow_hash (ip0, flow_hash_config0);
146 if (PREDICT_FALSE (lb1->lb_n_buckets > 1))
148 flow_hash_config1 = lb1->lb_hash_config;
149 vnet_buffer (p1)->ip.flow_hash =
150 ip6_compute_flow_hash (ip1, flow_hash_config1);
153 ASSERT (lb0->lb_n_buckets > 0);
154 ASSERT (lb1->lb_n_buckets > 0);
155 ASSERT (is_pow2 (lb0->lb_n_buckets));
156 ASSERT (is_pow2 (lb1->lb_n_buckets));
157 dpo0 = load_balance_get_bucket_i (lb0,
158 (vnet_buffer (p0)->ip.flow_hash &
159 lb0->lb_n_buckets_minus_1));
160 dpo1 = load_balance_get_bucket_i (lb1,
161 (vnet_buffer (p1)->ip.flow_hash &
162 lb1->lb_n_buckets_minus_1));
164 next0 = dpo0->dpoi_next_node;
165 next1 = dpo1->dpoi_next_node;
167 /* Only process the HBH Option Header if explicitly configured to do so */
169 (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
171 next0 = (dpo_is_adj (dpo0) && im->hbh_enabled) ?
172 (ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next0;
175 (ip1->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
177 next1 = (dpo_is_adj (dpo1) && im->hbh_enabled) ?
178 (ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next1;
180 vnet_buffer (p0)->ip.adj_index[VLIB_TX] = dpo0->dpoi_index;
181 vnet_buffer (p1)->ip.adj_index[VLIB_TX] = dpo1->dpoi_index;
183 vlib_increment_combined_counter
184 (cm, cpu_index, lbi0, 1, vlib_buffer_length_in_chain (vm, p0));
185 vlib_increment_combined_counter
186 (cm, cpu_index, lbi1, 1, vlib_buffer_length_in_chain (vm, p1));
193 wrong_next = (next0 != next) + 2 * (next1 != next);
194 if (PREDICT_FALSE (wrong_next != 0))
203 vlib_set_next_frame_buffer (vm, node, next0, pi0);
210 vlib_set_next_frame_buffer (vm, node, next1, pi1);
217 vlib_set_next_frame_buffer (vm, node, next0, pi0);
218 vlib_set_next_frame_buffer (vm, node, next1, pi1);
222 vlib_put_next_frame (vm, node, next, n_left_to_next);
224 vlib_get_next_frame (vm, node, next, to_next,
231 while (n_left_from > 0 && n_left_to_next > 0)
236 ip_lookup_next_t next0;
238 ip6_address_t *dst_addr0;
239 u32 fib_index0, flow_hash_config0;
240 const dpo_id_t *dpo0;
245 p0 = vlib_get_buffer (vm, pi0);
247 ip0 = vlib_buffer_get_current (p0);
249 dst_addr0 = &ip0->dst_address;
252 vec_elt (im->fib_index_by_sw_if_index,
253 vnet_buffer (p0)->sw_if_index[VLIB_RX]);
255 (vnet_buffer (p0)->sw_if_index[VLIB_TX] ==
256 (u32) ~ 0) ? fib_index0 : vnet_buffer (p0)->sw_if_index[VLIB_TX];
258 flow_hash_config0 = ip6_fib_get (fib_index0)->flow_hash_config;
260 lbi0 = ip6_fib_table_fwding_lookup (im, fib_index0, dst_addr0);
262 lb0 = load_balance_get (lbi0);
264 vnet_buffer (p0)->ip.flow_hash = 0;
266 if (PREDICT_FALSE (lb0->lb_n_buckets > 1))
268 flow_hash_config0 = lb0->lb_hash_config;
269 vnet_buffer (p0)->ip.flow_hash =
270 ip6_compute_flow_hash (ip0, flow_hash_config0);
273 ASSERT (lb0->lb_n_buckets > 0);
274 ASSERT (is_pow2 (lb0->lb_n_buckets));
275 dpo0 = load_balance_get_bucket_i (lb0,
276 (vnet_buffer (p0)->ip.flow_hash &
277 lb0->lb_n_buckets_minus_1));
278 next0 = dpo0->dpoi_next_node;
280 /* Only process the HBH Option Header if explicitly configured to do so */
282 (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
284 next0 = (dpo_is_adj (dpo0) && im->hbh_enabled) ?
285 (ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next0;
287 vnet_buffer (p0)->ip.adj_index[VLIB_TX] = dpo0->dpoi_index;
289 vlib_increment_combined_counter
290 (cm, cpu_index, lbi0, 1, vlib_buffer_length_in_chain (vm, p0));
297 if (PREDICT_FALSE (next0 != next))
300 vlib_put_next_frame (vm, node, next, n_left_to_next);
302 vlib_get_next_frame (vm, node, next, to_next, n_left_to_next);
309 vlib_put_next_frame (vm, node, next, n_left_to_next);
312 if (node->flags & VLIB_NODE_FLAG_TRACE)
313 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
315 return frame->n_vectors;
319 ip6_add_interface_routes (vnet_main_t * vnm, u32 sw_if_index,
320 ip6_main_t * im, u32 fib_index,
321 ip_interface_address_t * a)
323 ip_lookup_main_t *lm = &im->lookup_main;
324 ip6_address_t *address = ip_interface_address_get_address (lm, a);
326 .fp_len = a->address_length,
327 .fp_proto = FIB_PROTOCOL_IP6,
328 .fp_addr.ip6 = *address,
331 a->neighbor_probe_adj_index = ~0;
332 if (a->address_length < 128)
334 fib_node_index_t fei;
336 fei = fib_table_entry_update_one_path (fib_index, &pfx, FIB_SOURCE_INTERFACE, (FIB_ENTRY_FLAG_CONNECTED | FIB_ENTRY_FLAG_ATTACHED), FIB_PROTOCOL_IP6, NULL, /* No next-hop address */
337 sw_if_index, ~0, // invalid FIB index
338 1, NULL, // no label stack
339 FIB_ROUTE_PATH_FLAG_NONE);
340 a->neighbor_probe_adj_index = fib_entry_get_adj (fei);
344 if (sw_if_index < vec_len (lm->classify_table_index_by_sw_if_index))
346 u32 classify_table_index =
347 lm->classify_table_index_by_sw_if_index[sw_if_index];
348 if (classify_table_index != (u32) ~ 0)
350 dpo_id_t dpo = DPO_INVALID;
355 classify_dpo_create (DPO_PROTO_IP6, classify_table_index));
357 fib_table_entry_special_dpo_add (fib_index,
360 FIB_ENTRY_FLAG_NONE, &dpo);
365 fib_table_entry_update_one_path (fib_index, &pfx, FIB_SOURCE_INTERFACE, (FIB_ENTRY_FLAG_CONNECTED | FIB_ENTRY_FLAG_LOCAL), FIB_PROTOCOL_IP6, &pfx.fp_addr, sw_if_index, ~0, // invalid FIB index
366 1, NULL, FIB_ROUTE_PATH_FLAG_NONE);
370 ip6_del_interface_routes (ip6_main_t * im,
372 ip6_address_t * address, u32 address_length)
375 .fp_len = address_length,
376 .fp_proto = FIB_PROTOCOL_IP6,
377 .fp_addr.ip6 = *address,
380 if (pfx.fp_len < 128)
382 fib_table_entry_delete (fib_index, &pfx, FIB_SOURCE_INTERFACE);
387 fib_table_entry_delete (fib_index, &pfx, FIB_SOURCE_INTERFACE);
391 ip6_sw_interface_enable_disable (u32 sw_if_index, u32 is_enable)
393 ip6_main_t *im = &ip6_main;
395 vec_validate_init_empty (im->ip_enabled_by_sw_if_index, sw_if_index, 0);
398 * enable/disable only on the 1<->0 transition
402 if (1 != ++im->ip_enabled_by_sw_if_index[sw_if_index])
407 /* The ref count is 0 when an address is removed from an interface that has
408 * no address - this is not a ciritical error */
409 if (0 == im->ip_enabled_by_sw_if_index[sw_if_index] ||
410 0 != --im->ip_enabled_by_sw_if_index[sw_if_index])
414 if (sw_if_index != 0)
415 ip6_mfib_interface_enable_disable (sw_if_index, is_enable);
417 vnet_feature_enable_disable ("ip6-unicast", "ip6-lookup", sw_if_index,
420 vnet_feature_enable_disable ("ip6-multicast", "ip6-mfib-forward-lookup",
421 sw_if_index, is_enable, 0, 0);
425 /* get first interface address */
427 ip6_interface_first_address (ip6_main_t * im,
429 ip_interface_address_t ** result_ia)
431 ip_lookup_main_t *lm = &im->lookup_main;
432 ip_interface_address_t *ia = 0;
433 ip6_address_t *result = 0;
436 foreach_ip_interface_address (lm, ia, sw_if_index,
437 1 /* honor unnumbered */,
439 ip6_address_t * a = ip_interface_address_get_address (lm, ia);
445 *result_ia = result ? ia : 0;
450 ip6_add_del_interface_address (vlib_main_t * vm,
452 ip6_address_t * address,
453 u32 address_length, u32 is_del)
455 vnet_main_t *vnm = vnet_get_main ();
456 ip6_main_t *im = &ip6_main;
457 ip_lookup_main_t *lm = &im->lookup_main;
459 u32 if_address_index;
460 ip6_address_fib_t ip6_af, *addr_fib = 0;
462 vec_validate (im->fib_index_by_sw_if_index, sw_if_index);
463 vec_validate (im->mfib_index_by_sw_if_index, sw_if_index);
465 ip6_addr_fib_init (&ip6_af, address,
466 vec_elt (im->fib_index_by_sw_if_index, sw_if_index));
467 vec_add1 (addr_fib, ip6_af);
470 uword elts_before = pool_elts (lm->if_address_pool);
472 error = ip_interface_address_add_del
473 (lm, sw_if_index, addr_fib, address_length, is_del, &if_address_index);
477 /* Pool did not grow: add duplicate address. */
478 if (elts_before == pool_elts (lm->if_address_pool))
482 ip6_sw_interface_enable_disable (sw_if_index, !is_del);
485 ip6_del_interface_routes (im, ip6_af.fib_index, address, address_length);
487 ip6_add_interface_routes (vnm, sw_if_index,
488 im, ip6_af.fib_index,
489 pool_elt_at_index (lm->if_address_pool,
493 ip6_add_del_interface_address_callback_t *cb;
494 vec_foreach (cb, im->add_del_interface_address_callbacks)
495 cb->function (im, cb->function_opaque, sw_if_index,
496 address, address_length, if_address_index, is_del);
505 ip6_sw_interface_admin_up_down (vnet_main_t * vnm, u32 sw_if_index, u32 flags)
507 ip6_main_t *im = &ip6_main;
508 ip_interface_address_t *ia;
510 u32 is_admin_up, fib_index;
512 /* Fill in lookup tables with default table (0). */
513 vec_validate (im->fib_index_by_sw_if_index, sw_if_index);
515 vec_validate_init_empty (im->
516 lookup_main.if_address_pool_index_by_sw_if_index,
519 is_admin_up = (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) != 0;
521 fib_index = vec_elt (im->fib_index_by_sw_if_index, sw_if_index);
524 foreach_ip_interface_address (&im->lookup_main, ia, sw_if_index,
525 0 /* honor unnumbered */,
527 a = ip_interface_address_get_address (&im->lookup_main, ia);
529 ip6_add_interface_routes (vnm, sw_if_index,
533 ip6_del_interface_routes (im, fib_index,
534 a, ia->address_length);
541 VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION (ip6_sw_interface_admin_up_down);
543 /* Built-in ip6 unicast rx feature path definition */
545 VNET_FEATURE_ARC_INIT (ip6_unicast, static) =
547 .arc_name = "ip6-unicast",
548 .start_nodes = VNET_FEATURES ("ip6-input"),
549 .arc_index_ptr = &ip6_main.lookup_main.ucast_feature_arc_index,
552 VNET_FEATURE_INIT (ip6_flow_classify, static) =
554 .arc_name = "ip6-unicast",
555 .node_name = "ip6-flow-classify",
556 .runs_before = VNET_FEATURES ("ip6-inacl"),
559 VNET_FEATURE_INIT (ip6_inacl, static) =
561 .arc_name = "ip6-unicast",
562 .node_name = "ip6-inacl",
563 .runs_before = VNET_FEATURES ("ip6-policer-classify"),
566 VNET_FEATURE_INIT (ip6_policer_classify, static) =
568 .arc_name = "ip6-unicast",
569 .node_name = "ip6-policer-classify",
570 .runs_before = VNET_FEATURES ("ipsec-input-ip6"),
573 VNET_FEATURE_INIT (ip6_ipsec, static) =
575 .arc_name = "ip6-unicast",
576 .node_name = "ipsec-input-ip6",
577 .runs_before = VNET_FEATURES ("l2tp-decap"),
580 VNET_FEATURE_INIT (ip6_l2tp, static) =
582 .arc_name = "ip6-unicast",
583 .node_name = "l2tp-decap",
584 .runs_before = VNET_FEATURES ("vpath-input-ip6"),
587 VNET_FEATURE_INIT (ip6_vpath, static) =
589 .arc_name = "ip6-unicast",
590 .node_name = "vpath-input-ip6",
591 .runs_before = VNET_FEATURES ("ip6-lookup"),
594 VNET_FEATURE_INIT (ip6_lookup, static) =
596 .arc_name = "ip6-unicast",
597 .node_name = "ip6-lookup",
598 .runs_before = VNET_FEATURES ("ip6-drop"),
601 VNET_FEATURE_INIT (ip6_drop, static) =
603 .arc_name = "ip6-unicast",
604 .node_name = "ip6-drop",
605 .runs_before = 0, /*last feature*/
608 /* Built-in ip6 multicast rx feature path definition (none now) */
609 VNET_FEATURE_ARC_INIT (ip6_multicast, static) =
611 .arc_name = "ip6-multicast",
612 .start_nodes = VNET_FEATURES ("ip6-input"),
613 .arc_index_ptr = &ip6_main.lookup_main.mcast_feature_arc_index,
616 VNET_FEATURE_INIT (ip6_vpath_mc, static) = {
617 .arc_name = "ip6-multicast",
618 .node_name = "vpath-input-ip6",
619 .runs_before = VNET_FEATURES ("ip6-mfib-forward-lookup"),
622 VNET_FEATURE_INIT (ip6_mc_lookup, static) = {
623 .arc_name = "ip6-multicast",
624 .node_name = "ip6-mfib-forward-lookup",
625 .runs_before = VNET_FEATURES ("ip6-drop"),
628 VNET_FEATURE_INIT (ip6_drop_mc, static) = {
629 .arc_name = "ip6-multicast",
630 .node_name = "ip6-drop",
631 .runs_before = 0, /* last feature */
634 /* Built-in ip4 tx feature path definition */
635 VNET_FEATURE_ARC_INIT (ip6_output, static) =
637 .arc_name = "ip6-output",
638 .start_nodes = VNET_FEATURES ("ip6-rewrite", "ip6-midchain"),
639 .arc_index_ptr = &ip6_main.lookup_main.output_feature_arc_index,
642 VNET_FEATURE_INIT (ip6_ipsec_output, static) = {
643 .arc_name = "ip6-output",
644 .node_name = "ipsec-output-ip6",
645 .runs_before = VNET_FEATURES ("interface-output"),
648 VNET_FEATURE_INIT (ip6_interface_output, static) = {
649 .arc_name = "ip6-output",
650 .node_name = "interface-output",
651 .runs_before = 0, /* not before any other features */
656 ip6_sw_interface_add_del (vnet_main_t * vnm, u32 sw_if_index, u32 is_add)
658 vnet_feature_enable_disable ("ip6-unicast", "ip6-drop", sw_if_index,
661 vnet_feature_enable_disable ("ip6-multicast", "ip6-drop", sw_if_index,
664 vnet_feature_enable_disable ("ip6-output", "interface-output", sw_if_index,
667 return /* no error */ 0;
670 VNET_SW_INTERFACE_ADD_DEL_FUNCTION (ip6_sw_interface_add_del);
673 ip6_lookup (vlib_main_t * vm,
674 vlib_node_runtime_t * node, vlib_frame_t * frame)
676 return ip6_lookup_inline (vm, node, frame);
679 static u8 *format_ip6_lookup_trace (u8 * s, va_list * args);
682 VLIB_REGISTER_NODE (ip6_lookup_node) =
684 .function = ip6_lookup,
685 .name = "ip6-lookup",
686 .vector_size = sizeof (u32),
687 .format_trace = format_ip6_lookup_trace,
688 .n_next_nodes = IP6_LOOKUP_N_NEXT,
689 .next_nodes = IP6_LOOKUP_NEXT_NODES,
693 VLIB_NODE_FUNCTION_MULTIARCH (ip6_lookup_node, ip6_lookup);
696 ip6_load_balance (vlib_main_t * vm,
697 vlib_node_runtime_t * node, vlib_frame_t * frame)
699 vlib_combined_counter_main_t *cm = &load_balance_main.lbm_via_counters;
700 u32 n_left_from, n_left_to_next, *from, *to_next;
701 ip_lookup_next_t next;
702 u32 cpu_index = os_get_cpu_number ();
703 ip6_main_t *im = &ip6_main;
705 from = vlib_frame_vector_args (frame);
706 n_left_from = frame->n_vectors;
707 next = node->cached_next_index;
709 if (node->flags & VLIB_NODE_FLAG_TRACE)
710 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
712 while (n_left_from > 0)
714 vlib_get_next_frame (vm, node, next, to_next, n_left_to_next);
717 while (n_left_from >= 4 && n_left_to_next >= 2)
719 ip_lookup_next_t next0, next1;
720 const load_balance_t *lb0, *lb1;
721 vlib_buffer_t *p0, *p1;
722 u32 pi0, lbi0, hc0, pi1, lbi1, hc1;
723 const ip6_header_t *ip0, *ip1;
724 const dpo_id_t *dpo0, *dpo1;
726 /* Prefetch next iteration. */
728 vlib_buffer_t *p2, *p3;
730 p2 = vlib_get_buffer (vm, from[2]);
731 p3 = vlib_get_buffer (vm, from[3]);
733 vlib_prefetch_buffer_header (p2, STORE);
734 vlib_prefetch_buffer_header (p3, STORE);
736 CLIB_PREFETCH (p2->data, sizeof (ip0[0]), STORE);
737 CLIB_PREFETCH (p3->data, sizeof (ip0[0]), STORE);
740 pi0 = to_next[0] = from[0];
741 pi1 = to_next[1] = from[1];
748 p0 = vlib_get_buffer (vm, pi0);
749 p1 = vlib_get_buffer (vm, pi1);
751 ip0 = vlib_buffer_get_current (p0);
752 ip1 = vlib_buffer_get_current (p1);
753 lbi0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
754 lbi1 = vnet_buffer (p1)->ip.adj_index[VLIB_TX];
756 lb0 = load_balance_get (lbi0);
757 lb1 = load_balance_get (lbi1);
760 * this node is for via FIBs we can re-use the hash value from the
761 * to node if present.
762 * We don't want to use the same hash value at each level in the recursion
763 * graph as that would lead to polarisation
765 hc0 = vnet_buffer (p0)->ip.flow_hash = 0;
766 hc1 = vnet_buffer (p1)->ip.flow_hash = 0;
768 if (PREDICT_FALSE (lb0->lb_n_buckets > 1))
770 if (PREDICT_TRUE (vnet_buffer (p0)->ip.flow_hash))
772 hc0 = vnet_buffer (p0)->ip.flow_hash =
773 vnet_buffer (p0)->ip.flow_hash >> 1;
777 hc0 = vnet_buffer (p0)->ip.flow_hash =
778 ip6_compute_flow_hash (ip0, hc0);
781 if (PREDICT_FALSE (lb1->lb_n_buckets > 1))
783 if (PREDICT_TRUE (vnet_buffer (p1)->ip.flow_hash))
785 hc1 = vnet_buffer (p1)->ip.flow_hash =
786 vnet_buffer (p1)->ip.flow_hash >> 1;
790 hc1 = vnet_buffer (p1)->ip.flow_hash =
791 ip6_compute_flow_hash (ip1, hc1);
796 load_balance_get_bucket_i (lb0,
797 hc0 & (lb0->lb_n_buckets_minus_1));
799 load_balance_get_bucket_i (lb1,
800 hc1 & (lb1->lb_n_buckets_minus_1));
802 next0 = dpo0->dpoi_next_node;
803 next1 = dpo1->dpoi_next_node;
805 /* Only process the HBH Option Header if explicitly configured to do so */
807 (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
809 next0 = (dpo_is_adj (dpo0) && im->hbh_enabled) ?
810 (ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next0;
812 /* Only process the HBH Option Header if explicitly configured to do so */
814 (ip1->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
816 next1 = (dpo_is_adj (dpo1) && im->hbh_enabled) ?
817 (ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next1;
820 vnet_buffer (p0)->ip.adj_index[VLIB_TX] = dpo0->dpoi_index;
821 vnet_buffer (p1)->ip.adj_index[VLIB_TX] = dpo1->dpoi_index;
823 vlib_increment_combined_counter
824 (cm, cpu_index, lbi0, 1, vlib_buffer_length_in_chain (vm, p0));
825 vlib_increment_combined_counter
826 (cm, cpu_index, lbi1, 1, vlib_buffer_length_in_chain (vm, p1));
828 vlib_validate_buffer_enqueue_x2 (vm, node, next,
829 to_next, n_left_to_next,
830 pi0, pi1, next0, next1);
833 while (n_left_from > 0 && n_left_to_next > 0)
835 ip_lookup_next_t next0;
836 const load_balance_t *lb0;
839 const ip6_header_t *ip0;
840 const dpo_id_t *dpo0;
849 p0 = vlib_get_buffer (vm, pi0);
851 ip0 = vlib_buffer_get_current (p0);
852 lbi0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
854 lb0 = load_balance_get (lbi0);
856 hc0 = vnet_buffer (p0)->ip.flow_hash = 0;
857 if (PREDICT_FALSE (lb0->lb_n_buckets > 1))
859 if (PREDICT_TRUE (vnet_buffer (p0)->ip.flow_hash))
861 hc0 = vnet_buffer (p0)->ip.flow_hash =
862 vnet_buffer (p0)->ip.flow_hash >> 1;
866 hc0 = vnet_buffer (p0)->ip.flow_hash =
867 ip6_compute_flow_hash (ip0, hc0);
871 load_balance_get_bucket_i (lb0,
872 hc0 & (lb0->lb_n_buckets_minus_1));
874 next0 = dpo0->dpoi_next_node;
875 vnet_buffer (p0)->ip.adj_index[VLIB_TX] = dpo0->dpoi_index;
877 /* Only process the HBH Option Header if explicitly configured to do so */
879 (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
881 next0 = (dpo_is_adj (dpo0) && im->hbh_enabled) ?
882 (ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next0;
885 vlib_increment_combined_counter
886 (cm, cpu_index, lbi0, 1, vlib_buffer_length_in_chain (vm, p0));
888 vlib_validate_buffer_enqueue_x1 (vm, node, next,
889 to_next, n_left_to_next,
893 vlib_put_next_frame (vm, node, next, n_left_to_next);
896 return frame->n_vectors;
900 VLIB_REGISTER_NODE (ip6_load_balance_node) =
902 .function = ip6_load_balance,
903 .name = "ip6-load-balance",
904 .vector_size = sizeof (u32),
905 .sibling_of = "ip6-lookup",
906 .format_trace = format_ip6_lookup_trace,
910 VLIB_NODE_FUNCTION_MULTIARCH (ip6_load_balance_node, ip6_load_balance);
914 /* Adjacency taken. */
919 /* Packet data, possibly *after* rewrite. */
920 u8 packet_data[128 - 1 * sizeof (u32)];
922 ip6_forward_next_trace_t;
925 format_ip6_forward_next_trace (u8 * s, va_list * args)
927 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
928 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
929 ip6_forward_next_trace_t *t = va_arg (*args, ip6_forward_next_trace_t *);
930 uword indent = format_get_indent (s);
932 s = format (s, "%U%U",
933 format_white_space, indent,
934 format_ip6_header, t->packet_data, sizeof (t->packet_data));
939 format_ip6_lookup_trace (u8 * s, va_list * args)
941 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
942 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
943 ip6_forward_next_trace_t *t = va_arg (*args, ip6_forward_next_trace_t *);
944 uword indent = format_get_indent (s);
946 s = format (s, "fib %d dpo-idx %d flow hash: 0x%08x",
947 t->fib_index, t->adj_index, t->flow_hash);
948 s = format (s, "\n%U%U",
949 format_white_space, indent,
950 format_ip6_header, t->packet_data, sizeof (t->packet_data));
956 format_ip6_rewrite_trace (u8 * s, va_list * args)
958 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
959 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
960 ip6_forward_next_trace_t *t = va_arg (*args, ip6_forward_next_trace_t *);
961 vnet_main_t *vnm = vnet_get_main ();
962 uword indent = format_get_indent (s);
964 s = format (s, "tx_sw_if_index %d adj-idx %d : %U flow hash: 0x%08x",
965 t->fib_index, t->adj_index, format_ip_adjacency,
966 t->adj_index, FORMAT_IP_ADJACENCY_NONE, t->flow_hash);
967 s = format (s, "\n%U%U",
968 format_white_space, indent,
969 format_ip_adjacency_packet_data,
970 vnm, t->adj_index, t->packet_data, sizeof (t->packet_data));
974 /* Common trace function for all ip6-forward next nodes. */
976 ip6_forward_next_trace (vlib_main_t * vm,
977 vlib_node_runtime_t * node,
978 vlib_frame_t * frame, vlib_rx_or_tx_t which_adj_index)
981 ip6_main_t *im = &ip6_main;
983 n_left = frame->n_vectors;
984 from = vlib_frame_vector_args (frame);
989 vlib_buffer_t *b0, *b1;
990 ip6_forward_next_trace_t *t0, *t1;
992 /* Prefetch next iteration. */
993 vlib_prefetch_buffer_with_index (vm, from[2], LOAD);
994 vlib_prefetch_buffer_with_index (vm, from[3], LOAD);
999 b0 = vlib_get_buffer (vm, bi0);
1000 b1 = vlib_get_buffer (vm, bi1);
1002 if (b0->flags & VLIB_BUFFER_IS_TRACED)
1004 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
1005 t0->adj_index = vnet_buffer (b0)->ip.adj_index[which_adj_index];
1006 t0->flow_hash = vnet_buffer (b0)->ip.flow_hash;
1008 (vnet_buffer (b0)->sw_if_index[VLIB_TX] !=
1009 (u32) ~ 0) ? vnet_buffer (b0)->sw_if_index[VLIB_TX] :
1010 vec_elt (im->fib_index_by_sw_if_index,
1011 vnet_buffer (b0)->sw_if_index[VLIB_RX]);
1013 clib_memcpy (t0->packet_data,
1014 vlib_buffer_get_current (b0),
1015 sizeof (t0->packet_data));
1017 if (b1->flags & VLIB_BUFFER_IS_TRACED)
1019 t1 = vlib_add_trace (vm, node, b1, sizeof (t1[0]));
1020 t1->adj_index = vnet_buffer (b1)->ip.adj_index[which_adj_index];
1021 t1->flow_hash = vnet_buffer (b1)->ip.flow_hash;
1023 (vnet_buffer (b1)->sw_if_index[VLIB_TX] !=
1024 (u32) ~ 0) ? vnet_buffer (b1)->sw_if_index[VLIB_TX] :
1025 vec_elt (im->fib_index_by_sw_if_index,
1026 vnet_buffer (b1)->sw_if_index[VLIB_RX]);
1028 clib_memcpy (t1->packet_data,
1029 vlib_buffer_get_current (b1),
1030 sizeof (t1->packet_data));
1040 ip6_forward_next_trace_t *t0;
1044 b0 = vlib_get_buffer (vm, bi0);
1046 if (b0->flags & VLIB_BUFFER_IS_TRACED)
1048 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
1049 t0->adj_index = vnet_buffer (b0)->ip.adj_index[which_adj_index];
1050 t0->flow_hash = vnet_buffer (b0)->ip.flow_hash;
1052 (vnet_buffer (b0)->sw_if_index[VLIB_TX] !=
1053 (u32) ~ 0) ? vnet_buffer (b0)->sw_if_index[VLIB_TX] :
1054 vec_elt (im->fib_index_by_sw_if_index,
1055 vnet_buffer (b0)->sw_if_index[VLIB_RX]);
1057 clib_memcpy (t0->packet_data,
1058 vlib_buffer_get_current (b0),
1059 sizeof (t0->packet_data));
1067 ip6_drop_or_punt (vlib_main_t * vm,
1068 vlib_node_runtime_t * node,
1069 vlib_frame_t * frame, ip6_error_t error_code)
1071 u32 *buffers = vlib_frame_vector_args (frame);
1072 uword n_packets = frame->n_vectors;
1074 vlib_error_drop_buffers (vm, node, buffers,
1078 ip6_input_node.index, error_code);
1080 if (node->flags & VLIB_NODE_FLAG_TRACE)
1081 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
1087 ip6_drop (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
1089 return ip6_drop_or_punt (vm, node, frame, IP6_ERROR_ADJACENCY_DROP);
1093 ip6_punt (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
1095 return ip6_drop_or_punt (vm, node, frame, IP6_ERROR_ADJACENCY_PUNT);
1099 VLIB_REGISTER_NODE (ip6_drop_node, static) =
1101 .function = ip6_drop,
1103 .vector_size = sizeof (u32),
1104 .format_trace = format_ip6_forward_next_trace,
1108 [0] = "error-drop",},
1112 VLIB_NODE_FUNCTION_MULTIARCH (ip6_drop_node, ip6_drop);
1115 VLIB_REGISTER_NODE (ip6_punt_node, static) =
1117 .function = ip6_punt,
1119 .vector_size = sizeof (u32),
1120 .format_trace = format_ip6_forward_next_trace,
1124 [0] = "error-punt",},
1128 VLIB_NODE_FUNCTION_MULTIARCH (ip6_punt_node, ip6_punt);
1130 /* Compute TCP/UDP/ICMP6 checksum in software. */
1132 ip6_tcp_udp_icmp_compute_checksum (vlib_main_t * vm, vlib_buffer_t * p0,
1133 ip6_header_t * ip0, int *bogus_lengthp)
1136 u16 sum16, payload_length_host_byte_order;
1137 u32 i, n_this_buffer, n_bytes_left;
1138 u32 headers_size = sizeof (ip0[0]);
1139 void *data_this_buffer;
1141 ASSERT (bogus_lengthp);
1144 /* Initialize checksum with ip header. */
1145 sum0 = ip0->payload_length + clib_host_to_net_u16 (ip0->protocol);
1146 payload_length_host_byte_order = clib_net_to_host_u16 (ip0->payload_length);
1147 data_this_buffer = (void *) (ip0 + 1);
1149 for (i = 0; i < ARRAY_LEN (ip0->src_address.as_uword); i++)
1151 sum0 = ip_csum_with_carry (sum0,
1152 clib_mem_unaligned (&ip0->
1153 src_address.as_uword[i],
1156 ip_csum_with_carry (sum0,
1157 clib_mem_unaligned (&ip0->dst_address.as_uword[i],
1161 /* some icmp packets may come with a "router alert" hop-by-hop extension header (e.g., mldv2 packets) */
1162 if (PREDICT_FALSE (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
1165 ip6_hop_by_hop_ext_t *ext_hdr =
1166 (ip6_hop_by_hop_ext_t *) data_this_buffer;
1168 /* validate really icmp6 next */
1169 ASSERT (ext_hdr->next_hdr == IP_PROTOCOL_ICMP6);
1171 skip_bytes = 8 * (1 + ext_hdr->n_data_u64s);
1172 data_this_buffer = (void *) ((u8 *) data_this_buffer + skip_bytes);
1174 payload_length_host_byte_order -= skip_bytes;
1175 headers_size += skip_bytes;
1178 n_bytes_left = n_this_buffer = payload_length_host_byte_order;
1179 if (p0 && n_this_buffer + headers_size > p0->current_length)
1181 p0->current_length >
1182 headers_size ? p0->current_length - headers_size : 0;
1185 sum0 = ip_incremental_checksum (sum0, data_this_buffer, n_this_buffer);
1186 n_bytes_left -= n_this_buffer;
1187 if (n_bytes_left == 0)
1190 if (!(p0->flags & VLIB_BUFFER_NEXT_PRESENT))
1195 p0 = vlib_get_buffer (vm, p0->next_buffer);
1196 data_this_buffer = vlib_buffer_get_current (p0);
1197 n_this_buffer = p0->current_length;
1200 sum16 = ~ip_csum_fold (sum0);
1206 ip6_tcp_udp_icmp_validate_checksum (vlib_main_t * vm, vlib_buffer_t * p0)
1208 ip6_header_t *ip0 = vlib_buffer_get_current (p0);
1213 /* some icmp packets may come with a "router alert" hop-by-hop extension header (e.g., mldv2 packets) */
1214 ASSERT (ip0->protocol == IP_PROTOCOL_TCP
1215 || ip0->protocol == IP_PROTOCOL_ICMP6
1216 || ip0->protocol == IP_PROTOCOL_UDP
1217 || ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS);
1219 udp0 = (void *) (ip0 + 1);
1220 if (ip0->protocol == IP_PROTOCOL_UDP && udp0->checksum == 0)
1222 p0->flags |= (IP_BUFFER_L4_CHECKSUM_COMPUTED
1223 | IP_BUFFER_L4_CHECKSUM_CORRECT);
1227 sum16 = ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip0, &bogus_length);
1229 p0->flags |= (IP_BUFFER_L4_CHECKSUM_COMPUTED
1230 | ((sum16 == 0) << LOG2_IP_BUFFER_L4_CHECKSUM_CORRECT));
1235 /* ip6_locate_header
1237 * This function is to search for the header specified by the find_hdr number.
1238 * 1. If the find_hdr < 0 then it finds and returns the protocol number and
1239 * offset stored in *offset of the transport or ESP header in the chain if
1241 * 2. If a header with find_hdr > 0 protocol number is found then the
1242 * offset is stored in *offset and protocol number of the header is
1244 * 3. If find_hdr header is not found or packet is malformed or
1245 * it is a non-first fragment -1 is returned.
1248 ip6_locate_header (vlib_buffer_t * p0,
1249 ip6_header_t * ip0, int find_hdr, u32 * offset)
1251 u8 next_proto = ip0->protocol;
1255 u8 *temp_nxthdr = 0;
1258 next_header = ip6_next_header (ip0);
1259 cur_offset = sizeof (ip6_header_t);
1262 done = (next_proto == find_hdr);
1265 (u8 *) vlib_buffer_get_current (p0) + p0->current_length))
1267 //A malicious packet could set an extension header with a too big size
1272 if ((!ip6_ext_hdr (next_proto)) || next_proto == IP_PROTOCOL_IP6_NONXT)
1278 if (next_proto == IP_PROTOCOL_IPV6_FRAGMENTATION)
1280 ip6_frag_hdr_t *frag_hdr = (ip6_frag_hdr_t *) next_header;
1281 u16 frag_off = ip6_frag_hdr_offset (frag_hdr);
1282 /* Non first fragment return -1 */
1285 exthdr_len = sizeof (ip6_frag_hdr_t);
1286 temp_nxthdr = next_header + exthdr_len;
1288 else if (next_proto == IP_PROTOCOL_IPSEC_AH)
1291 ip6_ext_authhdr_len (((ip6_ext_header_t *) next_header));
1292 temp_nxthdr = next_header + exthdr_len;
1297 ip6_ext_header_len (((ip6_ext_header_t *) next_header));
1298 temp_nxthdr = next_header + exthdr_len;
1300 next_proto = ((ip6_ext_header_t *) next_header)->next_hdr;
1301 next_header = temp_nxthdr;
1302 cur_offset += exthdr_len;
1305 *offset = cur_offset;
1306 return (next_proto);
1310 ip6_local (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
1312 ip6_main_t *im = &ip6_main;
1313 ip_lookup_main_t *lm = &im->lookup_main;
1314 ip_local_next_t next_index;
1315 u32 *from, *to_next, n_left_from, n_left_to_next;
1316 vlib_node_runtime_t *error_node =
1317 vlib_node_get_runtime (vm, ip6_input_node.index);
1319 from = vlib_frame_vector_args (frame);
1320 n_left_from = frame->n_vectors;
1321 next_index = node->cached_next_index;
1323 if (node->flags & VLIB_NODE_FLAG_TRACE)
1324 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
1326 while (n_left_from > 0)
1328 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1330 while (n_left_from >= 4 && n_left_to_next >= 2)
1332 vlib_buffer_t *p0, *p1;
1333 ip6_header_t *ip0, *ip1;
1334 udp_header_t *udp0, *udp1;
1335 u32 pi0, ip_len0, udp_len0, flags0, next0;
1336 u32 pi1, ip_len1, udp_len1, flags1, next1;
1337 i32 len_diff0, len_diff1;
1338 u8 error0, type0, good_l4_checksum0;
1339 u8 error1, type1, good_l4_checksum1;
1340 u32 udp_offset0, udp_offset1;
1342 pi0 = to_next[0] = from[0];
1343 pi1 = to_next[1] = from[1];
1347 n_left_to_next -= 2;
1349 p0 = vlib_get_buffer (vm, pi0);
1350 p1 = vlib_get_buffer (vm, pi1);
1352 ip0 = vlib_buffer_get_current (p0);
1353 ip1 = vlib_buffer_get_current (p1);
1355 vnet_buffer (p0)->ip.start_of_ip_header = p0->current_data;
1356 vnet_buffer (p1)->ip.start_of_ip_header = p1->current_data;
1358 type0 = lm->builtin_protocol_by_ip_protocol[ip0->protocol];
1359 type1 = lm->builtin_protocol_by_ip_protocol[ip1->protocol];
1361 next0 = lm->local_next_by_ip_protocol[ip0->protocol];
1362 next1 = lm->local_next_by_ip_protocol[ip1->protocol];
1367 good_l4_checksum0 = (flags0 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0;
1368 good_l4_checksum1 = (flags1 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0;
1372 /* Skip HBH local processing */
1374 (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
1376 ip6_hop_by_hop_ext_t *ext_hdr =
1377 (ip6_hop_by_hop_ext_t *) ip6_next_header (ip0);
1378 next0 = lm->local_next_by_ip_protocol[ext_hdr->next_hdr];
1379 type0 = lm->builtin_protocol_by_ip_protocol[ext_hdr->next_hdr];
1382 (ip1->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
1384 ip6_hop_by_hop_ext_t *ext_hdr =
1385 (ip6_hop_by_hop_ext_t *) ip6_next_header (ip1);
1386 next1 = lm->local_next_by_ip_protocol[ext_hdr->next_hdr];
1387 type1 = lm->builtin_protocol_by_ip_protocol[ext_hdr->next_hdr];
1389 if (PREDICT_TRUE (IP_PROTOCOL_UDP == ip6_locate_header (p0, ip0,
1393 udp0 = (udp_header_t *) ((u8 *) ip0 + udp_offset0);
1394 /* Don't verify UDP checksum for packets with explicit zero checksum. */
1395 good_l4_checksum0 |= type0 == IP_BUILTIN_PROTOCOL_UDP
1396 && udp0->checksum == 0;
1397 /* Verify UDP length. */
1398 ip_len0 = clib_net_to_host_u16 (ip0->payload_length);
1399 udp_len0 = clib_net_to_host_u16 (udp0->length);
1400 len_diff0 = ip_len0 - udp_len0;
1402 if (PREDICT_TRUE (IP_PROTOCOL_UDP == ip6_locate_header (p1, ip1,
1406 udp1 = (udp_header_t *) ((u8 *) ip1 + udp_offset1);
1407 /* Don't verify UDP checksum for packets with explicit zero checksum. */
1408 good_l4_checksum1 |= type1 == IP_BUILTIN_PROTOCOL_UDP
1409 && udp1->checksum == 0;
1410 /* Verify UDP length. */
1411 ip_len1 = clib_net_to_host_u16 (ip1->payload_length);
1412 udp_len1 = clib_net_to_host_u16 (udp1->length);
1413 len_diff1 = ip_len1 - udp_len1;
1416 good_l4_checksum0 |= type0 == IP_BUILTIN_PROTOCOL_UNKNOWN;
1417 good_l4_checksum1 |= type1 == IP_BUILTIN_PROTOCOL_UNKNOWN;
1419 len_diff0 = type0 == IP_BUILTIN_PROTOCOL_UDP ? len_diff0 : 0;
1420 len_diff1 = type1 == IP_BUILTIN_PROTOCOL_UDP ? len_diff1 : 0;
1422 if (PREDICT_FALSE (type0 != IP_BUILTIN_PROTOCOL_UNKNOWN
1423 && !good_l4_checksum0
1424 && !(flags0 & IP_BUFFER_L4_CHECKSUM_COMPUTED)))
1426 flags0 = ip6_tcp_udp_icmp_validate_checksum (vm, p0);
1428 (flags0 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0;
1430 if (PREDICT_FALSE (type1 != IP_BUILTIN_PROTOCOL_UNKNOWN
1431 && !good_l4_checksum1
1432 && !(flags1 & IP_BUFFER_L4_CHECKSUM_COMPUTED)))
1434 flags1 = ip6_tcp_udp_icmp_validate_checksum (vm, p1);
1436 (flags1 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0;
1439 error0 = error1 = IP6_ERROR_UNKNOWN_PROTOCOL;
1441 error0 = len_diff0 < 0 ? IP6_ERROR_UDP_LENGTH : error0;
1442 error1 = len_diff1 < 0 ? IP6_ERROR_UDP_LENGTH : error1;
1444 ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_UDP ==
1445 IP6_ERROR_UDP_CHECKSUM);
1446 ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_ICMP ==
1447 IP6_ERROR_ICMP_CHECKSUM);
1449 (!good_l4_checksum0 ? IP6_ERROR_UDP_CHECKSUM + type0 : error0);
1451 (!good_l4_checksum1 ? IP6_ERROR_UDP_CHECKSUM + type1 : error1);
1453 /* Drop packets from unroutable hosts. */
1454 /* If this is a neighbor solicitation (ICMP), skip source RPF check */
1455 if (error0 == IP6_ERROR_UNKNOWN_PROTOCOL &&
1456 type0 != IP_BUILTIN_PROTOCOL_ICMP &&
1457 !ip6_address_is_link_local_unicast (&ip0->src_address))
1459 u32 src_adj_index0 = ip6_src_lookup_for_packet (im, p0, ip0);
1460 error0 = (ADJ_INDEX_INVALID == src_adj_index0
1461 ? IP6_ERROR_SRC_LOOKUP_MISS : error0);
1463 if (error1 == IP6_ERROR_UNKNOWN_PROTOCOL &&
1464 type1 != IP_BUILTIN_PROTOCOL_ICMP &&
1465 !ip6_address_is_link_local_unicast (&ip1->src_address))
1467 u32 src_adj_index1 = ip6_src_lookup_for_packet (im, p1, ip1);
1468 error1 = (ADJ_INDEX_INVALID == src_adj_index1
1469 ? IP6_ERROR_SRC_LOOKUP_MISS : error1);
1473 error0 != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next0;
1475 error1 != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next1;
1477 p0->error = error_node->errors[error0];
1478 p1->error = error_node->errors[error1];
1480 vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
1481 to_next, n_left_to_next,
1482 pi0, pi1, next0, next1);
1485 while (n_left_from > 0 && n_left_to_next > 0)
1490 u32 pi0, ip_len0, udp_len0, flags0, next0;
1492 u8 error0, type0, good_l4_checksum0;
1495 pi0 = to_next[0] = from[0];
1499 n_left_to_next -= 1;
1501 p0 = vlib_get_buffer (vm, pi0);
1503 ip0 = vlib_buffer_get_current (p0);
1505 vnet_buffer (p0)->ip.start_of_ip_header = p0->current_data;
1507 type0 = lm->builtin_protocol_by_ip_protocol[ip0->protocol];
1508 next0 = lm->local_next_by_ip_protocol[ip0->protocol];
1512 good_l4_checksum0 = (flags0 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0;
1515 /* Skip HBH local processing */
1517 (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
1519 ip6_hop_by_hop_ext_t *ext_hdr =
1520 (ip6_hop_by_hop_ext_t *) ip6_next_header (ip0);
1521 next0 = lm->local_next_by_ip_protocol[ext_hdr->next_hdr];
1522 type0 = lm->builtin_protocol_by_ip_protocol[ext_hdr->next_hdr];
1524 if (PREDICT_TRUE (IP_PROTOCOL_UDP == ip6_locate_header (p0, ip0,
1528 udp0 = (udp_header_t *) ((u8 *) ip0 + udp_offset0);
1529 /* Don't verify UDP checksum for packets with explicit zero checksum. */
1530 good_l4_checksum0 |= type0 == IP_BUILTIN_PROTOCOL_UDP
1531 && udp0->checksum == 0;
1532 /* Verify UDP length. */
1533 ip_len0 = clib_net_to_host_u16 (ip0->payload_length);
1534 udp_len0 = clib_net_to_host_u16 (udp0->length);
1535 len_diff0 = ip_len0 - udp_len0;
1538 good_l4_checksum0 |= type0 == IP_BUILTIN_PROTOCOL_UNKNOWN;
1539 len_diff0 = type0 == IP_BUILTIN_PROTOCOL_UDP ? len_diff0 : 0;
1541 if (PREDICT_FALSE (type0 != IP_BUILTIN_PROTOCOL_UNKNOWN
1542 && !good_l4_checksum0
1543 && !(flags0 & IP_BUFFER_L4_CHECKSUM_COMPUTED)))
1545 flags0 = ip6_tcp_udp_icmp_validate_checksum (vm, p0);
1547 (flags0 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0;
1550 error0 = IP6_ERROR_UNKNOWN_PROTOCOL;
1552 error0 = len_diff0 < 0 ? IP6_ERROR_UDP_LENGTH : error0;
1554 ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_UDP ==
1555 IP6_ERROR_UDP_CHECKSUM);
1556 ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_ICMP ==
1557 IP6_ERROR_ICMP_CHECKSUM);
1559 (!good_l4_checksum0 ? IP6_ERROR_UDP_CHECKSUM + type0 : error0);
1561 /* If this is a neighbor solicitation (ICMP), skip source RPF check */
1562 if (error0 == IP6_ERROR_UNKNOWN_PROTOCOL &&
1563 type0 != IP_BUILTIN_PROTOCOL_ICMP &&
1564 !ip6_address_is_link_local_unicast (&ip0->src_address))
1566 u32 src_adj_index0 = ip6_src_lookup_for_packet (im, p0, ip0);
1567 error0 = (ADJ_INDEX_INVALID == src_adj_index0
1568 ? IP6_ERROR_SRC_LOOKUP_MISS : error0);
1572 error0 != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next0;
1574 p0->error = error_node->errors[error0];
1576 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1577 to_next, n_left_to_next,
1581 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1584 return frame->n_vectors;
1588 VLIB_REGISTER_NODE (ip6_local_node, static) =
1590 .function = ip6_local,
1591 .name = "ip6-local",
1592 .vector_size = sizeof (u32),
1593 .format_trace = format_ip6_forward_next_trace,
1594 .n_next_nodes = IP_LOCAL_N_NEXT,
1597 [IP_LOCAL_NEXT_DROP] = "error-drop",
1598 [IP_LOCAL_NEXT_PUNT] = "error-punt",
1599 [IP_LOCAL_NEXT_UDP_LOOKUP] = "ip6-udp-lookup",
1600 [IP_LOCAL_NEXT_ICMP] = "ip6-icmp-input",
1605 VLIB_NODE_FUNCTION_MULTIARCH (ip6_local_node, ip6_local);
1608 ip6_register_protocol (u32 protocol, u32 node_index)
1610 vlib_main_t *vm = vlib_get_main ();
1611 ip6_main_t *im = &ip6_main;
1612 ip_lookup_main_t *lm = &im->lookup_main;
1614 ASSERT (protocol < ARRAY_LEN (lm->local_next_by_ip_protocol));
1615 lm->local_next_by_ip_protocol[protocol] =
1616 vlib_node_add_next (vm, ip6_local_node.index, node_index);
1621 IP6_DISCOVER_NEIGHBOR_NEXT_DROP,
1622 IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX,
1623 IP6_DISCOVER_NEIGHBOR_N_NEXT,
1624 } ip6_discover_neighbor_next_t;
1628 IP6_DISCOVER_NEIGHBOR_ERROR_DROP,
1629 IP6_DISCOVER_NEIGHBOR_ERROR_REQUEST_SENT,
1630 IP6_DISCOVER_NEIGHBOR_ERROR_NO_SOURCE_ADDRESS,
1631 } ip6_discover_neighbor_error_t;
1634 ip6_discover_neighbor_inline (vlib_main_t * vm,
1635 vlib_node_runtime_t * node,
1636 vlib_frame_t * frame, int is_glean)
1638 vnet_main_t *vnm = vnet_get_main ();
1639 ip6_main_t *im = &ip6_main;
1640 ip_lookup_main_t *lm = &im->lookup_main;
1641 u32 *from, *to_next_drop;
1642 uword n_left_from, n_left_to_next_drop;
1643 static f64 time_last_seed_change = -1e100;
1644 static u32 hash_seeds[3];
1645 static uword hash_bitmap[256 / BITS (uword)];
1649 if (node->flags & VLIB_NODE_FLAG_TRACE)
1650 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
1652 time_now = vlib_time_now (vm);
1653 if (time_now - time_last_seed_change > 1e-3)
1656 u32 *r = clib_random_buffer_get_data (&vm->random_buffer,
1657 sizeof (hash_seeds));
1658 for (i = 0; i < ARRAY_LEN (hash_seeds); i++)
1659 hash_seeds[i] = r[i];
1661 /* Mark all hash keys as been not-seen before. */
1662 for (i = 0; i < ARRAY_LEN (hash_bitmap); i++)
1665 time_last_seed_change = time_now;
1668 from = vlib_frame_vector_args (frame);
1669 n_left_from = frame->n_vectors;
1671 while (n_left_from > 0)
1673 vlib_get_next_frame (vm, node, IP6_DISCOVER_NEIGHBOR_NEXT_DROP,
1674 to_next_drop, n_left_to_next_drop);
1676 while (n_left_from > 0 && n_left_to_next_drop > 0)
1680 u32 pi0, adj_index0, a0, b0, c0, m0, sw_if_index0, drop0;
1682 ip_adjacency_t *adj0;
1683 vnet_hw_interface_t *hw_if0;
1688 p0 = vlib_get_buffer (vm, pi0);
1690 adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
1692 ip0 = vlib_buffer_get_current (p0);
1694 adj0 = ip_get_adjacency (lm, adj_index0);
1698 ip0->dst_address.as_u64[0] =
1699 adj0->sub_type.nbr.next_hop.ip6.as_u64[0];
1700 ip0->dst_address.as_u64[1] =
1701 adj0->sub_type.nbr.next_hop.ip6.as_u64[1];
1708 sw_if_index0 = adj0->rewrite_header.sw_if_index;
1709 vnet_buffer (p0)->sw_if_index[VLIB_TX] = sw_if_index0;
1712 b0 ^= ip0->dst_address.as_u32[0];
1713 c0 ^= ip0->dst_address.as_u32[1];
1715 hash_v3_mix32 (a0, b0, c0);
1717 b0 ^= ip0->dst_address.as_u32[2];
1718 c0 ^= ip0->dst_address.as_u32[3];
1720 hash_v3_finalize32 (a0, b0, c0);
1722 c0 &= BITS (hash_bitmap) - 1;
1723 c0 = c0 / BITS (uword);
1724 m0 = (uword) 1 << (c0 % BITS (uword));
1726 bm0 = hash_bitmap[c0];
1727 drop0 = (bm0 & m0) != 0;
1729 /* Mark it as seen. */
1730 hash_bitmap[c0] = bm0 | m0;
1734 to_next_drop[0] = pi0;
1736 n_left_to_next_drop -= 1;
1738 hw_if0 = vnet_get_sup_hw_interface (vnm, sw_if_index0);
1740 /* If the interface is link-down, drop the pkt */
1741 if (!(hw_if0->flags & VNET_HW_INTERFACE_FLAG_LINK_UP))
1745 node->errors[drop0 ? IP6_DISCOVER_NEIGHBOR_ERROR_DROP
1746 : IP6_DISCOVER_NEIGHBOR_ERROR_REQUEST_SENT];
1751 * the adj has been updated to a rewrite but the node the DPO that got
1752 * us here hasn't - yet. no big deal. we'll drop while we wait.
1754 if (IP_LOOKUP_NEXT_REWRITE == adj0->lookup_next_index)
1759 icmp6_neighbor_solicitation_header_t *h0;
1762 h0 = vlib_packet_template_get_packet
1763 (vm, &im->discover_neighbor_packet_template, &bi0);
1766 * Build ethernet header.
1767 * Choose source address based on destination lookup
1770 if (ip6_src_address_for_packet (lm,
1772 &h0->ip.src_address))
1774 /* There is no address on the interface */
1776 node->errors[IP6_DISCOVER_NEIGHBOR_ERROR_NO_SOURCE_ADDRESS];
1777 vlib_buffer_free (vm, &bi0, 1);
1782 * Destination address is a solicited node multicast address.
1783 * We need to fill in
1784 * the low 24 bits with low 24 bits of target's address.
1786 h0->ip.dst_address.as_u8[13] = ip0->dst_address.as_u8[13];
1787 h0->ip.dst_address.as_u8[14] = ip0->dst_address.as_u8[14];
1788 h0->ip.dst_address.as_u8[15] = ip0->dst_address.as_u8[15];
1790 h0->neighbor.target_address = ip0->dst_address;
1792 clib_memcpy (h0->link_layer_option.ethernet_address,
1793 hw_if0->hw_address, vec_len (hw_if0->hw_address));
1795 /* $$$$ appears we need this; why is the checksum non-zero? */
1796 h0->neighbor.icmp.checksum = 0;
1797 h0->neighbor.icmp.checksum =
1798 ip6_tcp_udp_icmp_compute_checksum (vm, 0, &h0->ip,
1801 ASSERT (bogus_length == 0);
1803 vlib_buffer_copy_trace_flag (vm, p0, bi0);
1804 b0 = vlib_get_buffer (vm, bi0);
1805 vnet_buffer (b0)->sw_if_index[VLIB_TX]
1806 = vnet_buffer (p0)->sw_if_index[VLIB_TX];
1808 /* Add rewrite/encap string. */
1809 vnet_rewrite_one_header (adj0[0], h0, sizeof (ethernet_header_t));
1810 vlib_buffer_advance (b0, -adj0->rewrite_header.data_bytes);
1812 next0 = IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX;
1814 vlib_set_next_frame_buffer (vm, node, next0, bi0);
1818 vlib_put_next_frame (vm, node, IP6_DISCOVER_NEIGHBOR_NEXT_DROP,
1819 n_left_to_next_drop);
1822 return frame->n_vectors;
1826 ip6_discover_neighbor (vlib_main_t * vm,
1827 vlib_node_runtime_t * node, vlib_frame_t * frame)
1829 return (ip6_discover_neighbor_inline (vm, node, frame, 0));
1833 ip6_glean (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
1835 return (ip6_discover_neighbor_inline (vm, node, frame, 1));
1838 static char *ip6_discover_neighbor_error_strings[] = {
1839 [IP6_DISCOVER_NEIGHBOR_ERROR_DROP] = "address overflow drops",
1840 [IP6_DISCOVER_NEIGHBOR_ERROR_REQUEST_SENT] = "neighbor solicitations sent",
1841 [IP6_DISCOVER_NEIGHBOR_ERROR_NO_SOURCE_ADDRESS]
1842 = "no source address for ND solicitation",
1846 VLIB_REGISTER_NODE (ip6_discover_neighbor_node) =
1848 .function = ip6_discover_neighbor,
1849 .name = "ip6-discover-neighbor",
1850 .vector_size = sizeof (u32),
1851 .format_trace = format_ip6_forward_next_trace,
1852 .n_errors = ARRAY_LEN (ip6_discover_neighbor_error_strings),
1853 .error_strings = ip6_discover_neighbor_error_strings,
1854 .n_next_nodes = IP6_DISCOVER_NEIGHBOR_N_NEXT,
1857 [IP6_DISCOVER_NEIGHBOR_NEXT_DROP] = "error-drop",
1858 [IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX] = "interface-output",
1864 VLIB_REGISTER_NODE (ip6_glean_node) =
1866 .function = ip6_glean,
1867 .name = "ip6-glean",
1868 .vector_size = sizeof (u32),
1869 .format_trace = format_ip6_forward_next_trace,
1870 .n_errors = ARRAY_LEN (ip6_discover_neighbor_error_strings),
1871 .error_strings = ip6_discover_neighbor_error_strings,
1872 .n_next_nodes = IP6_DISCOVER_NEIGHBOR_N_NEXT,
1875 [IP6_DISCOVER_NEIGHBOR_NEXT_DROP] = "error-drop",
1876 [IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX] = "interface-output",
1882 ip6_probe_neighbor (vlib_main_t * vm, ip6_address_t * dst, u32 sw_if_index)
1884 vnet_main_t *vnm = vnet_get_main ();
1885 ip6_main_t *im = &ip6_main;
1886 icmp6_neighbor_solicitation_header_t *h;
1888 ip_interface_address_t *ia;
1889 ip_adjacency_t *adj;
1890 vnet_hw_interface_t *hi;
1891 vnet_sw_interface_t *si;
1896 si = vnet_get_sw_interface (vnm, sw_if_index);
1898 if (!(si->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP))
1900 return clib_error_return (0, "%U: interface %U down",
1901 format_ip6_address, dst,
1902 format_vnet_sw_if_index_name, vnm,
1907 ip6_interface_address_matching_destination (im, dst, sw_if_index, &ia);
1910 vnm->api_errno = VNET_API_ERROR_NO_MATCHING_INTERFACE;
1911 return clib_error_return
1912 (0, "no matching interface address for destination %U (interface %U)",
1913 format_ip6_address, dst,
1914 format_vnet_sw_if_index_name, vnm, sw_if_index);
1918 vlib_packet_template_get_packet (vm,
1919 &im->discover_neighbor_packet_template,
1922 hi = vnet_get_sup_hw_interface (vnm, sw_if_index);
1924 /* Destination address is a solicited node multicast address. We need to fill in
1925 the low 24 bits with low 24 bits of target's address. */
1926 h->ip.dst_address.as_u8[13] = dst->as_u8[13];
1927 h->ip.dst_address.as_u8[14] = dst->as_u8[14];
1928 h->ip.dst_address.as_u8[15] = dst->as_u8[15];
1930 h->ip.src_address = src[0];
1931 h->neighbor.target_address = dst[0];
1933 clib_memcpy (h->link_layer_option.ethernet_address, hi->hw_address,
1934 vec_len (hi->hw_address));
1936 h->neighbor.icmp.checksum =
1937 ip6_tcp_udp_icmp_compute_checksum (vm, 0, &h->ip, &bogus_length);
1938 ASSERT (bogus_length == 0);
1940 b = vlib_get_buffer (vm, bi);
1941 vnet_buffer (b)->sw_if_index[VLIB_RX] =
1942 vnet_buffer (b)->sw_if_index[VLIB_TX] = sw_if_index;
1944 /* Add encapsulation string for software interface (e.g. ethernet header). */
1945 adj = ip_get_adjacency (&im->lookup_main, ia->neighbor_probe_adj_index);
1946 vnet_rewrite_one_header (adj[0], h, sizeof (ethernet_header_t));
1947 vlib_buffer_advance (b, -adj->rewrite_header.data_bytes);
1950 vlib_frame_t *f = vlib_get_frame_to_node (vm, hi->output_node_index);
1951 u32 *to_next = vlib_frame_vector_args (f);
1954 vlib_put_frame_to_node (vm, hi->output_node_index, f);
1957 return /* no error */ 0;
1962 IP6_REWRITE_NEXT_DROP,
1963 IP6_REWRITE_NEXT_ICMP_ERROR,
1964 } ip6_rewrite_next_t;
1967 ip6_rewrite_inline (vlib_main_t * vm,
1968 vlib_node_runtime_t * node,
1969 vlib_frame_t * frame, int is_midchain, int is_mcast)
1971 ip_lookup_main_t *lm = &ip6_main.lookup_main;
1972 u32 *from = vlib_frame_vector_args (frame);
1973 u32 n_left_from, n_left_to_next, *to_next, next_index;
1974 vlib_node_runtime_t *error_node =
1975 vlib_node_get_runtime (vm, ip6_input_node.index);
1977 n_left_from = frame->n_vectors;
1978 next_index = node->cached_next_index;
1979 u32 cpu_index = os_get_cpu_number ();
1981 while (n_left_from > 0)
1983 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1985 while (n_left_from >= 4 && n_left_to_next >= 2)
1987 ip_adjacency_t *adj0, *adj1;
1988 vlib_buffer_t *p0, *p1;
1989 ip6_header_t *ip0, *ip1;
1990 u32 pi0, rw_len0, next0, error0, adj_index0;
1991 u32 pi1, rw_len1, next1, error1, adj_index1;
1992 u32 tx_sw_if_index0, tx_sw_if_index1;
1994 /* Prefetch next iteration. */
1996 vlib_buffer_t *p2, *p3;
1998 p2 = vlib_get_buffer (vm, from[2]);
1999 p3 = vlib_get_buffer (vm, from[3]);
2001 vlib_prefetch_buffer_header (p2, LOAD);
2002 vlib_prefetch_buffer_header (p3, LOAD);
2004 CLIB_PREFETCH (p2->pre_data, 32, STORE);
2005 CLIB_PREFETCH (p3->pre_data, 32, STORE);
2007 CLIB_PREFETCH (p2->data, sizeof (ip0[0]), STORE);
2008 CLIB_PREFETCH (p3->data, sizeof (ip0[0]), STORE);
2011 pi0 = to_next[0] = from[0];
2012 pi1 = to_next[1] = from[1];
2017 n_left_to_next -= 2;
2019 p0 = vlib_get_buffer (vm, pi0);
2020 p1 = vlib_get_buffer (vm, pi1);
2022 adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
2023 adj_index1 = vnet_buffer (p1)->ip.adj_index[VLIB_TX];
2025 /* We should never rewrite a pkt using the MISS adjacency */
2026 ASSERT (adj_index0 && adj_index1);
2028 ip0 = vlib_buffer_get_current (p0);
2029 ip1 = vlib_buffer_get_current (p1);
2031 error0 = error1 = IP6_ERROR_NONE;
2032 next0 = next1 = IP6_REWRITE_NEXT_DROP;
2034 if (PREDICT_TRUE (!(p0->flags & VNET_BUFFER_LOCALLY_ORIGINATED)))
2036 i32 hop_limit0 = ip0->hop_limit;
2038 /* Input node should have reject packets with hop limit 0. */
2039 ASSERT (ip0->hop_limit > 0);
2043 ip0->hop_limit = hop_limit0;
2046 * If the hop count drops below 1 when forwarding, generate
2049 if (PREDICT_FALSE (hop_limit0 <= 0))
2051 error0 = IP6_ERROR_TIME_EXPIRED;
2052 next0 = IP6_REWRITE_NEXT_ICMP_ERROR;
2053 vnet_buffer (p0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
2054 icmp6_error_set_vnet_buffer (p0, ICMP6_time_exceeded,
2055 ICMP6_time_exceeded_ttl_exceeded_in_transit,
2061 p0->flags &= ~VNET_BUFFER_LOCALLY_ORIGINATED;
2063 if (PREDICT_TRUE (!(p1->flags & VNET_BUFFER_LOCALLY_ORIGINATED)))
2065 i32 hop_limit1 = ip1->hop_limit;
2067 /* Input node should have reject packets with hop limit 0. */
2068 ASSERT (ip1->hop_limit > 0);
2072 ip1->hop_limit = hop_limit1;
2075 * If the hop count drops below 1 when forwarding, generate
2078 if (PREDICT_FALSE (hop_limit1 <= 0))
2080 error1 = IP6_ERROR_TIME_EXPIRED;
2081 next1 = IP6_REWRITE_NEXT_ICMP_ERROR;
2082 vnet_buffer (p1)->sw_if_index[VLIB_TX] = (u32) ~ 0;
2083 icmp6_error_set_vnet_buffer (p1, ICMP6_time_exceeded,
2084 ICMP6_time_exceeded_ttl_exceeded_in_transit,
2090 p1->flags &= ~VNET_BUFFER_LOCALLY_ORIGINATED;
2092 adj0 = ip_get_adjacency (lm, adj_index0);
2093 adj1 = ip_get_adjacency (lm, adj_index1);
2095 rw_len0 = adj0[0].rewrite_header.data_bytes;
2096 rw_len1 = adj1[0].rewrite_header.data_bytes;
2097 vnet_buffer (p0)->ip.save_rewrite_length = rw_len0;
2098 vnet_buffer (p1)->ip.save_rewrite_length = rw_len1;
2100 vlib_increment_combined_counter
2101 (&adjacency_counters,
2103 adj_index0, 1, vlib_buffer_length_in_chain (vm, p0) + rw_len0);
2104 vlib_increment_combined_counter
2105 (&adjacency_counters,
2106 cpu_index, adj_index1,
2107 1, vlib_buffer_length_in_chain (vm, p1) + rw_len1);
2109 /* Check MTU of outgoing interface. */
2111 (vlib_buffer_length_in_chain (vm, p0) >
2113 rewrite_header.max_l3_packet_bytes ? IP6_ERROR_MTU_EXCEEDED :
2116 (vlib_buffer_length_in_chain (vm, p1) >
2118 rewrite_header.max_l3_packet_bytes ? IP6_ERROR_MTU_EXCEEDED :
2121 /* Don't adjust the buffer for hop count issue; icmp-error node
2122 * wants to see the IP headerr */
2123 if (PREDICT_TRUE (error0 == IP6_ERROR_NONE))
2125 p0->current_data -= rw_len0;
2126 p0->current_length += rw_len0;
2128 tx_sw_if_index0 = adj0[0].rewrite_header.sw_if_index;
2129 vnet_buffer (p0)->sw_if_index[VLIB_TX] = tx_sw_if_index0;
2130 next0 = adj0[0].rewrite_header.next_index;
2132 vnet_feature_arc_start (lm->output_feature_arc_index,
2133 tx_sw_if_index0, &next0, p0);
2135 if (PREDICT_TRUE (error1 == IP6_ERROR_NONE))
2137 p1->current_data -= rw_len1;
2138 p1->current_length += rw_len1;
2140 tx_sw_if_index1 = adj1[0].rewrite_header.sw_if_index;
2141 vnet_buffer (p1)->sw_if_index[VLIB_TX] = tx_sw_if_index1;
2142 next1 = adj1[0].rewrite_header.next_index;
2144 vnet_feature_arc_start (lm->output_feature_arc_index,
2145 tx_sw_if_index1, &next1, p1);
2148 /* Guess we are only writing on simple Ethernet header. */
2149 vnet_rewrite_two_headers (adj0[0], adj1[0],
2150 ip0, ip1, sizeof (ethernet_header_t));
2154 adj0->sub_type.midchain.fixup_func (vm, adj0, p0);
2155 adj1->sub_type.midchain.fixup_func (vm, adj1, p1);
2160 * copy bytes from the IP address into the MAC rewrite
2162 vnet_fixup_one_header (adj0[0], &ip0->dst_address, ip0, 0);
2163 vnet_fixup_one_header (adj1[0], &ip1->dst_address, ip1, 0);
2166 vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
2167 to_next, n_left_to_next,
2168 pi0, pi1, next0, next1);
2171 while (n_left_from > 0 && n_left_to_next > 0)
2173 ip_adjacency_t *adj0;
2177 u32 adj_index0, next0, error0;
2178 u32 tx_sw_if_index0;
2180 pi0 = to_next[0] = from[0];
2182 p0 = vlib_get_buffer (vm, pi0);
2184 adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
2186 /* We should never rewrite a pkt using the MISS adjacency */
2187 ASSERT (adj_index0);
2189 adj0 = ip_get_adjacency (lm, adj_index0);
2191 ip0 = vlib_buffer_get_current (p0);
2193 error0 = IP6_ERROR_NONE;
2194 next0 = IP6_REWRITE_NEXT_DROP;
2196 /* Check hop limit */
2197 if (PREDICT_TRUE (!(p0->flags & VNET_BUFFER_LOCALLY_ORIGINATED)))
2199 i32 hop_limit0 = ip0->hop_limit;
2201 ASSERT (ip0->hop_limit > 0);
2205 ip0->hop_limit = hop_limit0;
2207 if (PREDICT_FALSE (hop_limit0 <= 0))
2210 * If the hop count drops below 1 when forwarding, generate
2213 error0 = IP6_ERROR_TIME_EXPIRED;
2214 next0 = IP6_REWRITE_NEXT_ICMP_ERROR;
2215 vnet_buffer (p0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
2216 icmp6_error_set_vnet_buffer (p0, ICMP6_time_exceeded,
2217 ICMP6_time_exceeded_ttl_exceeded_in_transit,
2223 p0->flags &= ~VNET_BUFFER_LOCALLY_ORIGINATED;
2226 /* Guess we are only writing on simple Ethernet header. */
2227 vnet_rewrite_one_header (adj0[0], ip0, sizeof (ethernet_header_t));
2229 /* Update packet buffer attributes/set output interface. */
2230 rw_len0 = adj0[0].rewrite_header.data_bytes;
2231 vnet_buffer (p0)->ip.save_rewrite_length = rw_len0;
2233 vlib_increment_combined_counter
2234 (&adjacency_counters,
2236 adj_index0, 1, vlib_buffer_length_in_chain (vm, p0) + rw_len0);
2238 /* Check MTU of outgoing interface. */
2240 (vlib_buffer_length_in_chain (vm, p0) >
2242 rewrite_header.max_l3_packet_bytes ? IP6_ERROR_MTU_EXCEEDED :
2245 /* Don't adjust the buffer for hop count issue; icmp-error node
2246 * wants to see the IP headerr */
2247 if (PREDICT_TRUE (error0 == IP6_ERROR_NONE))
2249 p0->current_data -= rw_len0;
2250 p0->current_length += rw_len0;
2252 tx_sw_if_index0 = adj0[0].rewrite_header.sw_if_index;
2254 vnet_buffer (p0)->sw_if_index[VLIB_TX] = tx_sw_if_index0;
2255 next0 = adj0[0].rewrite_header.next_index;
2257 vnet_feature_arc_start (lm->output_feature_arc_index,
2258 tx_sw_if_index0, &next0, p0);
2263 adj0->sub_type.midchain.fixup_func (vm, adj0, p0);
2267 vnet_fixup_one_header (adj0[0], &ip0->dst_address, ip0, 0);
2270 p0->error = error_node->errors[error0];
2275 n_left_to_next -= 1;
2277 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
2278 to_next, n_left_to_next,
2282 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2285 /* Need to do trace after rewrites to pick up new packet data. */
2286 if (node->flags & VLIB_NODE_FLAG_TRACE)
2287 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
2289 return frame->n_vectors;
2293 ip6_rewrite (vlib_main_t * vm,
2294 vlib_node_runtime_t * node, vlib_frame_t * frame)
2296 return ip6_rewrite_inline (vm, node, frame, 0, 0);
2300 ip6_rewrite_mcast (vlib_main_t * vm,
2301 vlib_node_runtime_t * node, vlib_frame_t * frame)
2303 return ip6_rewrite_inline (vm, node, frame, 0, 1);
2307 ip6_midchain (vlib_main_t * vm,
2308 vlib_node_runtime_t * node, vlib_frame_t * frame)
2310 return ip6_rewrite_inline (vm, node, frame, 1, 0);
2314 VLIB_REGISTER_NODE (ip6_midchain_node) =
2316 .function = ip6_midchain,
2317 .name = "ip6-midchain",
2318 .vector_size = sizeof (u32),
2319 .format_trace = format_ip6_forward_next_trace,
2320 .sibling_of = "ip6-rewrite",
2324 VLIB_NODE_FUNCTION_MULTIARCH (ip6_midchain_node, ip6_midchain);
2327 VLIB_REGISTER_NODE (ip6_rewrite_node) =
2329 .function = ip6_rewrite,
2330 .name = "ip6-rewrite",
2331 .vector_size = sizeof (u32),
2332 .format_trace = format_ip6_rewrite_trace,
2336 [IP6_REWRITE_NEXT_DROP] = "error-drop",
2337 [IP6_REWRITE_NEXT_ICMP_ERROR] = "ip6-icmp-error",
2342 VLIB_NODE_FUNCTION_MULTIARCH (ip6_rewrite_node, ip6_rewrite);
2345 VLIB_REGISTER_NODE (ip6_rewrite_mcast_node) =
2347 .function = ip6_rewrite_mcast,
2348 .name = "ip6-rewrite-mcast",
2349 .vector_size = sizeof (u32),
2350 .format_trace = format_ip6_rewrite_trace,
2351 .sibling_of = "ip6-rewrite",
2355 VLIB_NODE_FUNCTION_MULTIARCH (ip6_rewrite_mcast_node, ip6_rewrite_mcast);
2358 * Hop-by-Hop handling
2360 ip6_hop_by_hop_main_t ip6_hop_by_hop_main;
2362 #define foreach_ip6_hop_by_hop_error \
2363 _(PROCESSED, "pkts with ip6 hop-by-hop options") \
2364 _(FORMAT, "incorrectly formatted hop-by-hop options") \
2365 _(UNKNOWN_OPTION, "unknown ip6 hop-by-hop options")
2370 #define _(sym,str) IP6_HOP_BY_HOP_ERROR_##sym,
2371 foreach_ip6_hop_by_hop_error
2373 IP6_HOP_BY_HOP_N_ERROR,
2374 } ip6_hop_by_hop_error_t;
2378 * Primary h-b-h handler trace support
2379 * We work pretty hard on the problem for obvious reasons
2385 u8 option_data[256];
2386 } ip6_hop_by_hop_trace_t;
2388 vlib_node_registration_t ip6_hop_by_hop_node;
2390 static char *ip6_hop_by_hop_error_strings[] = {
2391 #define _(sym,string) string,
2392 foreach_ip6_hop_by_hop_error
2397 format_ip6_hop_by_hop_trace (u8 * s, va_list * args)
2399 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
2400 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
2401 ip6_hop_by_hop_trace_t *t = va_arg (*args, ip6_hop_by_hop_trace_t *);
2402 ip6_hop_by_hop_header_t *hbh0;
2403 ip6_hop_by_hop_option_t *opt0, *limit0;
2404 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2408 hbh0 = (ip6_hop_by_hop_header_t *) t->option_data;
2410 s = format (s, "IP6_HOP_BY_HOP: next index %d len %d traced %d",
2411 t->next_index, (hbh0->length + 1) << 3, t->trace_len);
2413 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2414 limit0 = (ip6_hop_by_hop_option_t *) ((u8 *) hbh0) + t->trace_len;
2416 while (opt0 < limit0)
2421 case 0: /* Pad, just stop */
2422 opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0) + 1;
2426 if (hm->trace[type0])
2428 s = (*hm->trace[type0]) (s, opt0);
2433 format (s, "\n unrecognized option %d length %d", type0,
2437 (ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length +
2438 sizeof (ip6_hop_by_hop_option_t));
2446 ip6_scan_hbh_options (vlib_buffer_t * b0,
2448 ip6_hop_by_hop_header_t * hbh0,
2449 ip6_hop_by_hop_option_t * opt0,
2450 ip6_hop_by_hop_option_t * limit0, u32 * next0)
2452 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2456 while (opt0 < limit0)
2462 opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0) + 1;
2467 if (hm->options[type0])
2469 if ((*hm->options[type0]) (b0, ip0, opt0) < 0)
2471 error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2477 /* Unrecognized mandatory option, check the two high order bits */
2478 switch (opt0->type & HBH_OPTION_TYPE_HIGH_ORDER_BITS)
2480 case HBH_OPTION_TYPE_SKIP_UNKNOWN:
2482 case HBH_OPTION_TYPE_DISCARD_UNKNOWN:
2483 error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2484 *next0 = IP_LOOKUP_NEXT_DROP;
2486 case HBH_OPTION_TYPE_DISCARD_UNKNOWN_ICMP:
2487 error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2488 *next0 = IP_LOOKUP_NEXT_ICMP_ERROR;
2489 icmp6_error_set_vnet_buffer (b0, ICMP6_parameter_problem,
2490 ICMP6_parameter_problem_unrecognized_option,
2491 (u8 *) opt0 - (u8 *) ip0);
2493 case HBH_OPTION_TYPE_DISCARD_UNKNOWN_ICMP_NOT_MCAST:
2494 error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2495 if (!ip6_address_is_multicast (&ip0->dst_address))
2497 *next0 = IP_LOOKUP_NEXT_ICMP_ERROR;
2498 icmp6_error_set_vnet_buffer (b0,
2499 ICMP6_parameter_problem,
2500 ICMP6_parameter_problem_unrecognized_option,
2501 (u8 *) opt0 - (u8 *) ip0);
2505 *next0 = IP_LOOKUP_NEXT_DROP;
2513 (ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length +
2514 sizeof (ip6_hop_by_hop_option_t));
2520 * Process the Hop-by-Hop Options header
2523 ip6_hop_by_hop (vlib_main_t * vm,
2524 vlib_node_runtime_t * node, vlib_frame_t * frame)
2526 vlib_node_runtime_t *error_node =
2527 vlib_node_get_runtime (vm, ip6_hop_by_hop_node.index);
2528 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2529 u32 n_left_from, *from, *to_next;
2530 ip_lookup_next_t next_index;
2531 ip6_main_t *im = &ip6_main;
2532 ip_lookup_main_t *lm = &im->lookup_main;
2534 from = vlib_frame_vector_args (frame);
2535 n_left_from = frame->n_vectors;
2536 next_index = node->cached_next_index;
2538 while (n_left_from > 0)
2542 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
2544 while (n_left_from >= 4 && n_left_to_next >= 2)
2547 vlib_buffer_t *b0, *b1;
2549 ip6_header_t *ip0, *ip1;
2550 ip6_hop_by_hop_header_t *hbh0, *hbh1;
2551 ip6_hop_by_hop_option_t *opt0, *limit0, *opt1, *limit1;
2552 u8 error0 = 0, error1 = 0;
2554 /* Prefetch next iteration. */
2556 vlib_buffer_t *p2, *p3;
2558 p2 = vlib_get_buffer (vm, from[2]);
2559 p3 = vlib_get_buffer (vm, from[3]);
2561 vlib_prefetch_buffer_header (p2, LOAD);
2562 vlib_prefetch_buffer_header (p3, LOAD);
2564 CLIB_PREFETCH (p2->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
2565 CLIB_PREFETCH (p3->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
2568 /* Speculatively enqueue b0, b1 to the current next frame */
2569 to_next[0] = bi0 = from[0];
2570 to_next[1] = bi1 = from[1];
2574 n_left_to_next -= 2;
2576 b0 = vlib_get_buffer (vm, bi0);
2577 b1 = vlib_get_buffer (vm, bi1);
2579 /* Default use the next_index from the adjacency. A HBH option rarely redirects to a different node */
2580 u32 adj_index0 = vnet_buffer (b0)->ip.adj_index[VLIB_TX];
2581 ip_adjacency_t *adj0 = ip_get_adjacency (lm, adj_index0);
2582 u32 adj_index1 = vnet_buffer (b1)->ip.adj_index[VLIB_TX];
2583 ip_adjacency_t *adj1 = ip_get_adjacency (lm, adj_index1);
2585 /* Default use the next_index from the adjacency. A HBH option rarely redirects to a different node */
2586 next0 = adj0->lookup_next_index;
2587 next1 = adj1->lookup_next_index;
2589 ip0 = vlib_buffer_get_current (b0);
2590 ip1 = vlib_buffer_get_current (b1);
2591 hbh0 = (ip6_hop_by_hop_header_t *) (ip0 + 1);
2592 hbh1 = (ip6_hop_by_hop_header_t *) (ip1 + 1);
2593 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2594 opt1 = (ip6_hop_by_hop_option_t *) (hbh1 + 1);
2596 (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 +
2597 ((hbh0->length + 1) << 3));
2599 (ip6_hop_by_hop_option_t *) ((u8 *) hbh1 +
2600 ((hbh1->length + 1) << 3));
2603 * Basic validity checks
2605 if ((hbh0->length + 1) << 3 >
2606 clib_net_to_host_u16 (ip0->payload_length))
2608 error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2609 next0 = IP_LOOKUP_NEXT_DROP;
2612 /* Scan the set of h-b-h options, process ones that we understand */
2613 error0 = ip6_scan_hbh_options (b0, ip0, hbh0, opt0, limit0, &next0);
2615 if ((hbh1->length + 1) << 3 >
2616 clib_net_to_host_u16 (ip1->payload_length))
2618 error1 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2619 next1 = IP_LOOKUP_NEXT_DROP;
2622 /* Scan the set of h-b-h options, process ones that we understand */
2623 error1 = ip6_scan_hbh_options (b1, ip1, hbh1, opt1, limit1, &next1);
2626 /* Has the classifier flagged this buffer for special treatment? */
2629 && (vnet_buffer (b0)->l2_classify.opaque_index & OI_DECAP)))
2630 next0 = hm->next_override;
2632 /* Has the classifier flagged this buffer for special treatment? */
2635 && (vnet_buffer (b1)->l2_classify.opaque_index & OI_DECAP)))
2636 next1 = hm->next_override;
2638 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)))
2640 if (b0->flags & VLIB_BUFFER_IS_TRACED)
2642 ip6_hop_by_hop_trace_t *t =
2643 vlib_add_trace (vm, node, b0, sizeof (*t));
2644 u32 trace_len = (hbh0->length + 1) << 3;
2645 t->next_index = next0;
2646 /* Capture the h-b-h option verbatim */
2649 ARRAY_LEN (t->option_data) ? trace_len :
2650 ARRAY_LEN (t->option_data);
2651 t->trace_len = trace_len;
2652 clib_memcpy (t->option_data, hbh0, trace_len);
2654 if (b1->flags & VLIB_BUFFER_IS_TRACED)
2656 ip6_hop_by_hop_trace_t *t =
2657 vlib_add_trace (vm, node, b1, sizeof (*t));
2658 u32 trace_len = (hbh1->length + 1) << 3;
2659 t->next_index = next1;
2660 /* Capture the h-b-h option verbatim */
2663 ARRAY_LEN (t->option_data) ? trace_len :
2664 ARRAY_LEN (t->option_data);
2665 t->trace_len = trace_len;
2666 clib_memcpy (t->option_data, hbh1, trace_len);
2671 b0->error = error_node->errors[error0];
2672 b1->error = error_node->errors[error1];
2674 /* verify speculative enqueue, maybe switch current next frame */
2675 vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
2676 n_left_to_next, bi0, bi1, next0,
2680 while (n_left_from > 0 && n_left_to_next > 0)
2686 ip6_hop_by_hop_header_t *hbh0;
2687 ip6_hop_by_hop_option_t *opt0, *limit0;
2690 /* Speculatively enqueue b0 to the current next frame */
2696 n_left_to_next -= 1;
2698 b0 = vlib_get_buffer (vm, bi0);
2700 * Default use the next_index from the adjacency.
2701 * A HBH option rarely redirects to a different node
2703 u32 adj_index0 = vnet_buffer (b0)->ip.adj_index[VLIB_TX];
2704 ip_adjacency_t *adj0 = ip_get_adjacency (lm, adj_index0);
2705 next0 = adj0->lookup_next_index;
2707 ip0 = vlib_buffer_get_current (b0);
2708 hbh0 = (ip6_hop_by_hop_header_t *) (ip0 + 1);
2709 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2711 (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 +
2712 ((hbh0->length + 1) << 3));
2715 * Basic validity checks
2717 if ((hbh0->length + 1) << 3 >
2718 clib_net_to_host_u16 (ip0->payload_length))
2720 error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2721 next0 = IP_LOOKUP_NEXT_DROP;
2725 /* Scan the set of h-b-h options, process ones that we understand */
2726 error0 = ip6_scan_hbh_options (b0, ip0, hbh0, opt0, limit0, &next0);
2729 /* Has the classifier flagged this buffer for special treatment? */
2732 && (vnet_buffer (b0)->l2_classify.opaque_index & OI_DECAP)))
2733 next0 = hm->next_override;
2735 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
2737 ip6_hop_by_hop_trace_t *t =
2738 vlib_add_trace (vm, node, b0, sizeof (*t));
2739 u32 trace_len = (hbh0->length + 1) << 3;
2740 t->next_index = next0;
2741 /* Capture the h-b-h option verbatim */
2744 ARRAY_LEN (t->option_data) ? trace_len :
2745 ARRAY_LEN (t->option_data);
2746 t->trace_len = trace_len;
2747 clib_memcpy (t->option_data, hbh0, trace_len);
2750 b0->error = error_node->errors[error0];
2752 /* verify speculative enqueue, maybe switch current next frame */
2753 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
2754 n_left_to_next, bi0, next0);
2756 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2758 return frame->n_vectors;
2762 VLIB_REGISTER_NODE (ip6_hop_by_hop_node) =
2764 .function = ip6_hop_by_hop,
2765 .name = "ip6-hop-by-hop",
2766 .sibling_of = "ip6-lookup",
2767 .vector_size = sizeof (u32),
2768 .format_trace = format_ip6_hop_by_hop_trace,
2769 .type = VLIB_NODE_TYPE_INTERNAL,
2770 .n_errors = ARRAY_LEN (ip6_hop_by_hop_error_strings),
2771 .error_strings = ip6_hop_by_hop_error_strings,
2776 VLIB_NODE_FUNCTION_MULTIARCH (ip6_hop_by_hop_node, ip6_hop_by_hop);
2778 static clib_error_t *
2779 ip6_hop_by_hop_init (vlib_main_t * vm)
2781 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2782 memset (hm->options, 0, sizeof (hm->options));
2783 memset (hm->trace, 0, sizeof (hm->trace));
2784 hm->next_override = IP6_LOOKUP_NEXT_POP_HOP_BY_HOP;
2788 VLIB_INIT_FUNCTION (ip6_hop_by_hop_init);
2791 ip6_hbh_set_next_override (uword next)
2793 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2795 hm->next_override = next;
2799 ip6_hbh_register_option (u8 option,
2800 int options (vlib_buffer_t * b, ip6_header_t * ip,
2801 ip6_hop_by_hop_option_t * opt),
2802 u8 * trace (u8 * s, ip6_hop_by_hop_option_t * opt))
2804 ip6_main_t *im = &ip6_main;
2805 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2807 ASSERT (option < ARRAY_LEN (hm->options));
2809 /* Already registered */
2810 if (hm->options[option])
2813 hm->options[option] = options;
2814 hm->trace[option] = trace;
2816 /* Set global variable */
2817 im->hbh_enabled = 1;
2823 ip6_hbh_unregister_option (u8 option)
2825 ip6_main_t *im = &ip6_main;
2826 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2828 ASSERT (option < ARRAY_LEN (hm->options));
2830 /* Not registered */
2831 if (!hm->options[option])
2834 hm->options[option] = NULL;
2835 hm->trace[option] = NULL;
2837 /* Disable global knob if this was the last option configured */
2840 for (i = 0; i < 256; i++)
2842 if (hm->options[option])
2849 im->hbh_enabled = 0;
2854 /* Global IP6 main. */
2855 ip6_main_t ip6_main;
2857 static clib_error_t *
2858 ip6_lookup_init (vlib_main_t * vm)
2860 ip6_main_t *im = &ip6_main;
2861 clib_error_t *error;
2864 if ((error = vlib_call_init_function (vm, vnet_feature_init)))
2867 for (i = 0; i < ARRAY_LEN (im->fib_masks); i++)
2874 for (j = 0; j < i0; j++)
2875 im->fib_masks[i].as_u32[j] = ~0;
2878 im->fib_masks[i].as_u32[i0] =
2879 clib_host_to_net_u32 (pow2_mask (i1) << (32 - i1));
2882 ip_lookup_init (&im->lookup_main, /* is_ip6 */ 1);
2884 if (im->lookup_table_nbuckets == 0)
2885 im->lookup_table_nbuckets = IP6_FIB_DEFAULT_HASH_NUM_BUCKETS;
2887 im->lookup_table_nbuckets = 1 << max_log2 (im->lookup_table_nbuckets);
2889 if (im->lookup_table_size == 0)
2890 im->lookup_table_size = IP6_FIB_DEFAULT_HASH_MEMORY_SIZE;
2892 BV (clib_bihash_init) (&(im->ip6_table[IP6_FIB_TABLE_FWDING].ip6_hash),
2893 "ip6 FIB fwding table",
2894 im->lookup_table_nbuckets, im->lookup_table_size);
2895 BV (clib_bihash_init) (&im->ip6_table[IP6_FIB_TABLE_NON_FWDING].ip6_hash,
2896 "ip6 FIB non-fwding table",
2897 im->lookup_table_nbuckets, im->lookup_table_size);
2899 /* Create FIB with index 0 and table id of 0. */
2900 fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6, 0);
2901 mfib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6, 0);
2905 pn = pg_get_node (ip6_lookup_node.index);
2906 pn->unformat_edit = unformat_pg_ip6_header;
2909 /* Unless explicitly configured, don't process HBH options */
2910 im->hbh_enabled = 0;
2913 icmp6_neighbor_solicitation_header_t p;
2915 memset (&p, 0, sizeof (p));
2917 p.ip.ip_version_traffic_class_and_flow_label =
2918 clib_host_to_net_u32 (0x6 << 28);
2919 p.ip.payload_length =
2920 clib_host_to_net_u16 (sizeof (p) -
2922 (icmp6_neighbor_solicitation_header_t, neighbor));
2923 p.ip.protocol = IP_PROTOCOL_ICMP6;
2924 p.ip.hop_limit = 255;
2925 ip6_set_solicited_node_multicast_address (&p.ip.dst_address, 0);
2927 p.neighbor.icmp.type = ICMP6_neighbor_solicitation;
2929 p.link_layer_option.header.type =
2930 ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address;
2931 p.link_layer_option.header.n_data_u64s =
2932 sizeof (p.link_layer_option) / sizeof (u64);
2934 vlib_packet_template_init (vm,
2935 &im->discover_neighbor_packet_template,
2937 /* alloc chunk size */ 8,
2938 "ip6 neighbor discovery");
2944 VLIB_INIT_FUNCTION (ip6_lookup_init);
2946 static clib_error_t *
2947 add_del_ip6_interface_table (vlib_main_t * vm,
2948 unformat_input_t * input,
2949 vlib_cli_command_t * cmd)
2951 vnet_main_t *vnm = vnet_get_main ();
2952 clib_error_t *error = 0;
2953 u32 sw_if_index, table_id;
2957 if (!unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
2959 error = clib_error_return (0, "unknown interface `%U'",
2960 format_unformat_error, input);
2964 if (unformat (input, "%d", &table_id))
2968 error = clib_error_return (0, "expected table id `%U'",
2969 format_unformat_error, input);
2974 u32 fib_index = fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6,
2977 vec_validate (ip6_main.fib_index_by_sw_if_index, sw_if_index);
2978 ip6_main.fib_index_by_sw_if_index[sw_if_index] = fib_index;
2980 fib_index = mfib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6,
2983 vec_validate (ip6_main.mfib_index_by_sw_if_index, sw_if_index);
2984 ip6_main.mfib_index_by_sw_if_index[sw_if_index] = fib_index;
2993 * Place the indicated interface into the supplied IPv6 FIB table (also known
2994 * as a VRF). If the FIB table does not exist, this command creates it. To
2995 * display the current IPv6 FIB table, use the command '<em>show ip6 fib</em>'.
2996 * FIB table will only be displayed if a route has been added to the table, or
2997 * an IP Address is assigned to an interface in the table (which adds a route
3000 * @note IP addresses added after setting the interface IP table end up in
3001 * the indicated FIB table. If the IP address is added prior to adding the
3002 * interface to the FIB table, it will NOT be part of the FIB table. Predictable
3003 * but potentially counter-intuitive results occur if you provision interface
3004 * addresses in multiple FIBs. Upon RX, packets will be processed in the last
3005 * IP table ID provisioned. It might be marginally useful to evade source RPF
3006 * drops to put an interface address into multiple FIBs.
3009 * Example of how to add an interface to an IPv6 FIB table (where 2 is the table-id):
3010 * @cliexcmd{set interface ip6 table GigabitEthernet2/0/0 2}
3013 VLIB_CLI_COMMAND (set_interface_ip6_table_command, static) =
3015 .path = "set interface ip6 table",
3016 .function = add_del_ip6_interface_table,
3017 .short_help = "set interface ip6 table <interface> <table-id>"
3022 ip6_link_local_address_from_ethernet_mac_address (ip6_address_t * ip,
3025 ip->as_u64[0] = clib_host_to_net_u64 (0xFE80000000000000ULL);
3026 /* Invert the "u" bit */
3027 ip->as_u8[8] = mac[0] ^ (1 << 1);
3028 ip->as_u8[9] = mac[1];
3029 ip->as_u8[10] = mac[2];
3030 ip->as_u8[11] = 0xFF;
3031 ip->as_u8[12] = 0xFE;
3032 ip->as_u8[13] = mac[3];
3033 ip->as_u8[14] = mac[4];
3034 ip->as_u8[15] = mac[5];
3038 ip6_ethernet_mac_address_from_link_local_address (u8 * mac,
3041 /* Invert the previously inverted "u" bit */
3042 mac[0] = ip->as_u8[8] ^ (1 << 1);
3043 mac[1] = ip->as_u8[9];
3044 mac[2] = ip->as_u8[10];
3045 mac[3] = ip->as_u8[13];
3046 mac[4] = ip->as_u8[14];
3047 mac[5] = ip->as_u8[15];
3050 static clib_error_t *
3051 test_ip6_link_command_fn (vlib_main_t * vm,
3052 unformat_input_t * input, vlib_cli_command_t * cmd)
3055 ip6_address_t _a, *a = &_a;
3057 if (unformat (input, "%U", unformat_ethernet_address, mac))
3059 ip6_link_local_address_from_ethernet_mac_address (a, mac);
3060 vlib_cli_output (vm, "Link local address: %U", format_ip6_address, a);
3061 ip6_ethernet_mac_address_from_link_local_address (mac, a);
3062 vlib_cli_output (vm, "Original MAC address: %U",
3063 format_ethernet_address, mac);
3070 * This command converts the given MAC Address into an IPv6 link-local
3074 * Example of how to create an IPv6 link-local address:
3075 * @cliexstart{test ip6 link 16:d9:e0:91:79:86}
3076 * Link local address: fe80::14d9:e0ff:fe91:7986
3077 * Original MAC address: 16:d9:e0:91:79:86
3081 VLIB_CLI_COMMAND (test_link_command, static) =
3083 .path = "test ip6 link",
3084 .function = test_ip6_link_command_fn,
3085 .short_help = "test ip6 link <mac-address>",
3090 vnet_set_ip6_flow_hash (u32 table_id, u32 flow_hash_config)
3092 ip6_main_t *im6 = &ip6_main;
3094 uword *p = hash_get (im6->fib_index_by_table_id, table_id);
3099 fib = ip6_fib_get (p[0]);
3101 fib->flow_hash_config = flow_hash_config;
3105 static clib_error_t *
3106 set_ip6_flow_hash_command_fn (vlib_main_t * vm,
3107 unformat_input_t * input,
3108 vlib_cli_command_t * cmd)
3112 u32 flow_hash_config = 0;
3115 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
3117 if (unformat (input, "table %d", &table_id))
3120 else if (unformat (input, #a)) { flow_hash_config |= v; matched=1;}
3121 foreach_flow_hash_bit
3128 return clib_error_return (0, "unknown input `%U'",
3129 format_unformat_error, input);
3131 rv = vnet_set_ip6_flow_hash (table_id, flow_hash_config);
3138 return clib_error_return (0, "no such FIB table %d", table_id);
3141 clib_warning ("BUG: illegal flow hash config 0x%x", flow_hash_config);
3149 * Configure the set of IPv6 fields used by the flow hash.
3153 * Example of how to set the flow hash on a given table:
3154 * @cliexcmd{set ip6 flow-hash table 8 dst sport dport proto}
3156 * Example of display the configured flow hash:
3157 * @cliexstart{show ip6 fib}
3158 * ipv6-VRF:0, fib_index 0, flow hash: src dst sport dport proto
3161 * [@0]: dpo-load-balance: [index:5 buckets:1 uRPF:5 to:[0:0]]
3162 * [0] [@0]: dpo-drop ip6
3165 * [@0]: dpo-load-balance: [index:10 buckets:1 uRPF:10 to:[0:0]]
3166 * [0] [@2]: dpo-receive
3169 * [@0]: dpo-load-balance: [index:8 buckets:1 uRPF:8 to:[0:0]]
3170 * [0] [@2]: dpo-receive
3173 * [@0]: dpo-load-balance: [index:7 buckets:1 uRPF:7 to:[0:0]]
3174 * [0] [@2]: dpo-receive
3177 * [@0]: dpo-load-balance: [index:9 buckets:1 uRPF:9 to:[0:0]]
3178 * [0] [@2]: dpo-receive
3179 * ff02::1:ff00:0/104
3181 * [@0]: dpo-load-balance: [index:6 buckets:1 uRPF:6 to:[0:0]]
3182 * [0] [@2]: dpo-receive
3183 * ipv6-VRF:8, fib_index 1, flow hash: dst sport dport proto
3186 * [@0]: dpo-load-balance: [index:21 buckets:1 uRPF:20 to:[0:0]]
3187 * [0] [@0]: dpo-drop ip6
3190 * [@0]: dpo-load-balance: [index:27 buckets:1 uRPF:26 to:[0:0]]
3191 * [0] [@4]: ipv6-glean: af_packet0
3194 * [@0]: dpo-load-balance: [index:28 buckets:1 uRPF:27 to:[0:0]]
3195 * [0] [@2]: dpo-receive: @::a:1:1:0:7 on af_packet0
3198 * [@0]: dpo-load-balance: [index:26 buckets:1 uRPF:25 to:[0:0]]
3199 * [0] [@2]: dpo-receive
3200 * fe80::fe:3eff:fe3e:9222/128
3202 * [@0]: dpo-load-balance: [index:29 buckets:1 uRPF:28 to:[0:0]]
3203 * [0] [@2]: dpo-receive: fe80::fe:3eff:fe3e:9222 on af_packet0
3206 * [@0]: dpo-load-balance: [index:24 buckets:1 uRPF:23 to:[0:0]]
3207 * [0] [@2]: dpo-receive
3210 * [@0]: dpo-load-balance: [index:23 buckets:1 uRPF:22 to:[0:0]]
3211 * [0] [@2]: dpo-receive
3214 * [@0]: dpo-load-balance: [index:25 buckets:1 uRPF:24 to:[0:0]]
3215 * [0] [@2]: dpo-receive
3216 * ff02::1:ff00:0/104
3218 * [@0]: dpo-load-balance: [index:22 buckets:1 uRPF:21 to:[0:0]]
3219 * [0] [@2]: dpo-receive
3224 VLIB_CLI_COMMAND (set_ip6_flow_hash_command, static) =
3226 .path = "set ip6 flow-hash",
3228 "set ip6 flow-hash table <table-id> [src] [dst] [sport] [dport] [proto] [reverse]",
3229 .function = set_ip6_flow_hash_command_fn,
3233 static clib_error_t *
3234 show_ip6_local_command_fn (vlib_main_t * vm,
3235 unformat_input_t * input, vlib_cli_command_t * cmd)
3237 ip6_main_t *im = &ip6_main;
3238 ip_lookup_main_t *lm = &im->lookup_main;
3241 vlib_cli_output (vm, "Protocols handled by ip6_local");
3242 for (i = 0; i < ARRAY_LEN (lm->local_next_by_ip_protocol); i++)
3244 if (lm->local_next_by_ip_protocol[i] != IP_LOCAL_NEXT_PUNT)
3245 vlib_cli_output (vm, "%d", i);
3253 * Display the set of protocols handled by the local IPv6 stack.
3256 * Example of how to display local protocol table:
3257 * @cliexstart{show ip6 local}
3258 * Protocols handled by ip6_local
3266 VLIB_CLI_COMMAND (show_ip6_local, static) =
3268 .path = "show ip6 local",
3269 .function = show_ip6_local_command_fn,
3270 .short_help = "show ip6 local",
3275 vnet_set_ip6_classify_intfc (vlib_main_t * vm, u32 sw_if_index,
3278 vnet_main_t *vnm = vnet_get_main ();
3279 vnet_interface_main_t *im = &vnm->interface_main;
3280 ip6_main_t *ipm = &ip6_main;
3281 ip_lookup_main_t *lm = &ipm->lookup_main;
3282 vnet_classify_main_t *cm = &vnet_classify_main;
3283 ip6_address_t *if_addr;
3285 if (pool_is_free_index (im->sw_interfaces, sw_if_index))
3286 return VNET_API_ERROR_NO_MATCHING_INTERFACE;
3288 if (table_index != ~0 && pool_is_free_index (cm->tables, table_index))
3289 return VNET_API_ERROR_NO_SUCH_ENTRY;
3291 vec_validate (lm->classify_table_index_by_sw_if_index, sw_if_index);
3292 lm->classify_table_index_by_sw_if_index[sw_if_index] = table_index;
3294 if_addr = ip6_interface_first_address (ipm, sw_if_index, NULL);
3296 if (NULL != if_addr)
3298 fib_prefix_t pfx = {
3300 .fp_proto = FIB_PROTOCOL_IP6,
3301 .fp_addr.ip6 = *if_addr,
3305 fib_index = fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4,
3309 if (table_index != (u32) ~ 0)
3311 dpo_id_t dpo = DPO_INVALID;
3316 classify_dpo_create (DPO_PROTO_IP6, table_index));
3318 fib_table_entry_special_dpo_add (fib_index,
3320 FIB_SOURCE_CLASSIFY,
3321 FIB_ENTRY_FLAG_NONE, &dpo);
3326 fib_table_entry_special_remove (fib_index,
3327 &pfx, FIB_SOURCE_CLASSIFY);
3334 static clib_error_t *
3335 set_ip6_classify_command_fn (vlib_main_t * vm,
3336 unformat_input_t * input,
3337 vlib_cli_command_t * cmd)
3339 u32 table_index = ~0;
3340 int table_index_set = 0;
3341 u32 sw_if_index = ~0;
3344 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
3346 if (unformat (input, "table-index %d", &table_index))
3347 table_index_set = 1;
3348 else if (unformat (input, "intfc %U", unformat_vnet_sw_interface,
3349 vnet_get_main (), &sw_if_index))
3355 if (table_index_set == 0)
3356 return clib_error_return (0, "classify table-index must be specified");
3358 if (sw_if_index == ~0)
3359 return clib_error_return (0, "interface / subif must be specified");
3361 rv = vnet_set_ip6_classify_intfc (vm, sw_if_index, table_index);
3368 case VNET_API_ERROR_NO_MATCHING_INTERFACE:
3369 return clib_error_return (0, "No such interface");
3371 case VNET_API_ERROR_NO_SUCH_ENTRY:
3372 return clib_error_return (0, "No such classifier table");
3378 * Assign a classification table to an interface. The classification
3379 * table is created using the '<em>classify table</em>' and '<em>classify session</em>'
3380 * commands. Once the table is create, use this command to filter packets
3384 * Example of how to assign a classification table to an interface:
3385 * @cliexcmd{set ip6 classify intfc GigabitEthernet2/0/0 table-index 1}
3388 VLIB_CLI_COMMAND (set_ip6_classify_command, static) =
3390 .path = "set ip6 classify",
3392 "set ip6 classify intfc <interface> table-index <classify-idx>",
3393 .function = set_ip6_classify_command_fn,
3397 static clib_error_t *
3398 ip6_config (vlib_main_t * vm, unformat_input_t * input)
3400 ip6_main_t *im = &ip6_main;
3405 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
3407 if (unformat (input, "hash-buckets %d", &tmp))
3409 else if (unformat (input, "heap-size %dm", &tmp))
3410 heapsize = ((u64) tmp) << 20;
3411 else if (unformat (input, "heap-size %dM", &tmp))
3412 heapsize = ((u64) tmp) << 20;
3413 else if (unformat (input, "heap-size %dg", &tmp))
3414 heapsize = ((u64) tmp) << 30;
3415 else if (unformat (input, "heap-size %dG", &tmp))
3416 heapsize = ((u64) tmp) << 30;
3418 return clib_error_return (0, "unknown input '%U'",
3419 format_unformat_error, input);
3422 im->lookup_table_nbuckets = nbuckets;
3423 im->lookup_table_size = heapsize;
3428 VLIB_EARLY_CONFIG_FUNCTION (ip6_config, "ip6");
3431 * fd.io coding-style-patch-verification: ON
3434 * eval: (c-set-style "gnu")