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/fib_table.h>
46 #include <vnet/fib/ip6_fib.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 ASSERT (im->ip_enabled_by_sw_if_index[sw_if_index] > 0);
408 if (0 != --im->ip_enabled_by_sw_if_index[sw_if_index])
412 vnet_feature_enable_disable ("ip6-unicast", "ip6-lookup", sw_if_index,
415 vnet_feature_enable_disable ("ip6-multicast", "ip6-lookup", sw_if_index,
420 /* get first interface address */
422 ip6_interface_first_address (ip6_main_t * im,
424 ip_interface_address_t ** result_ia)
426 ip_lookup_main_t *lm = &im->lookup_main;
427 ip_interface_address_t *ia = 0;
428 ip6_address_t *result = 0;
431 foreach_ip_interface_address (lm, ia, sw_if_index,
432 1 /* honor unnumbered */,
434 ip6_address_t * a = ip_interface_address_get_address (lm, ia);
440 *result_ia = result ? ia : 0;
445 ip6_add_del_interface_address (vlib_main_t * vm,
447 ip6_address_t * address,
448 u32 address_length, u32 is_del)
450 vnet_main_t *vnm = vnet_get_main ();
451 ip6_main_t *im = &ip6_main;
452 ip_lookup_main_t *lm = &im->lookup_main;
454 u32 if_address_index;
455 ip6_address_fib_t ip6_af, *addr_fib = 0;
457 vec_validate (im->fib_index_by_sw_if_index, sw_if_index);
458 ip6_addr_fib_init (&ip6_af, address,
459 vec_elt (im->fib_index_by_sw_if_index, sw_if_index));
460 vec_add1 (addr_fib, ip6_af);
463 uword elts_before = pool_elts (lm->if_address_pool);
465 error = ip_interface_address_add_del
466 (lm, sw_if_index, addr_fib, address_length, is_del, &if_address_index);
470 /* Pool did not grow: add duplicate address. */
471 if (elts_before == pool_elts (lm->if_address_pool))
475 ip6_sw_interface_enable_disable (sw_if_index, !is_del);
478 ip6_del_interface_routes (im, ip6_af.fib_index, address, address_length);
480 ip6_add_interface_routes (vnm, sw_if_index,
481 im, ip6_af.fib_index,
482 pool_elt_at_index (lm->if_address_pool,
486 ip6_add_del_interface_address_callback_t *cb;
487 vec_foreach (cb, im->add_del_interface_address_callbacks)
488 cb->function (im, cb->function_opaque, sw_if_index,
489 address, address_length, if_address_index, is_del);
498 ip6_sw_interface_admin_up_down (vnet_main_t * vnm, u32 sw_if_index, u32 flags)
500 ip6_main_t *im = &ip6_main;
501 ip_interface_address_t *ia;
503 u32 is_admin_up, fib_index;
505 /* Fill in lookup tables with default table (0). */
506 vec_validate (im->fib_index_by_sw_if_index, sw_if_index);
508 vec_validate_init_empty (im->
509 lookup_main.if_address_pool_index_by_sw_if_index,
512 is_admin_up = (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) != 0;
514 fib_index = vec_elt (im->fib_index_by_sw_if_index, sw_if_index);
517 foreach_ip_interface_address (&im->lookup_main, ia, sw_if_index,
518 0 /* honor unnumbered */,
520 a = ip_interface_address_get_address (&im->lookup_main, ia);
522 ip6_add_interface_routes (vnm, sw_if_index,
526 ip6_del_interface_routes (im, fib_index,
527 a, ia->address_length);
534 VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION (ip6_sw_interface_admin_up_down);
536 /* Built-in ip6 unicast rx feature path definition */
538 VNET_FEATURE_ARC_INIT (ip6_unicast, static) =
540 .arc_name = "ip6-unicast",
541 .start_nodes = VNET_FEATURES ("ip6-input"),
542 .arc_index_ptr = &ip6_main.lookup_main.ucast_feature_arc_index,
545 VNET_FEATURE_INIT (ip6_flow_classify, static) =
547 .arc_name = "ip6-unicast",
548 .node_name = "ip6-flow-classify",
549 .runs_before = VNET_FEATURES ("ip6-inacl"),
552 VNET_FEATURE_INIT (ip6_inacl, static) =
554 .arc_name = "ip6-unicast",
555 .node_name = "ip6-inacl",
556 .runs_before = VNET_FEATURES ("ip6-policer-classify"),
559 VNET_FEATURE_INIT (ip6_policer_classify, static) =
561 .arc_name = "ip6-unicast",
562 .node_name = "ip6-policer-classify",
563 .runs_before = VNET_FEATURES ("ipsec-input-ip6"),
566 VNET_FEATURE_INIT (ip6_ipsec, static) =
568 .arc_name = "ip6-unicast",
569 .node_name = "ipsec-input-ip6",
570 .runs_before = VNET_FEATURES ("l2tp-decap"),
573 VNET_FEATURE_INIT (ip6_l2tp, static) =
575 .arc_name = "ip6-unicast",
576 .node_name = "l2tp-decap",
577 .runs_before = VNET_FEATURES ("vpath-input-ip6"),
580 VNET_FEATURE_INIT (ip6_vpath, static) =
582 .arc_name = "ip6-unicast",
583 .node_name = "vpath-input-ip6",
584 .runs_before = VNET_FEATURES ("ip6-lookup"),
587 VNET_FEATURE_INIT (ip6_lookup, static) =
589 .arc_name = "ip6-unicast",
590 .node_name = "ip6-lookup",
591 .runs_before = VNET_FEATURES ("ip6-drop"),
594 VNET_FEATURE_INIT (ip6_drop, static) =
596 .arc_name = "ip6-unicast",
597 .node_name = "ip6-drop",
598 .runs_before = 0, /*last feature*/
601 /* Built-in ip6 multicast rx feature path definition (none now) */
602 VNET_FEATURE_ARC_INIT (ip6_multicast, static) =
604 .arc_name = "ip6-multicast",
605 .start_nodes = VNET_FEATURES ("ip6-input"),
606 .arc_index_ptr = &ip6_main.lookup_main.mcast_feature_arc_index,
609 VNET_FEATURE_INIT (ip6_vpath_mc, static) = {
610 .arc_name = "ip6-multicast",
611 .node_name = "vpath-input-ip6",
612 .runs_before = VNET_FEATURES ("ip6-lookup"),
615 VNET_FEATURE_INIT (ip6_mc_lookup, static) = {
616 .arc_name = "ip6-multicast",
617 .node_name = "ip6-lookup",
618 .runs_before = VNET_FEATURES ("ip6-drop"),
621 VNET_FEATURE_INIT (ip6_drop_mc, static) = {
622 .arc_name = "ip6-multicast",
623 .node_name = "ip6-drop",
624 .runs_before = 0, /* last feature */
627 /* Built-in ip4 tx feature path definition */
628 VNET_FEATURE_ARC_INIT (ip6_output, static) =
630 .arc_name = "ip6-output",
631 .start_nodes = VNET_FEATURES ("ip6-rewrite", "ip6-midchain"),
632 .arc_index_ptr = &ip6_main.lookup_main.output_feature_arc_index,
635 VNET_FEATURE_INIT (ip6_ipsec_output, static) = {
636 .arc_name = "ip6-output",
637 .node_name = "ipsec-output-ip6",
638 .runs_before = VNET_FEATURES ("interface-output"),
641 VNET_FEATURE_INIT (ip6_interface_output, static) = {
642 .arc_name = "ip6-output",
643 .node_name = "interface-output",
644 .runs_before = 0, /* not before any other features */
649 ip6_sw_interface_add_del (vnet_main_t * vnm, u32 sw_if_index, u32 is_add)
651 vnet_feature_enable_disable ("ip6-unicast", "ip6-drop", sw_if_index,
654 vnet_feature_enable_disable ("ip6-multicast", "ip6-drop", sw_if_index,
657 vnet_feature_enable_disable ("ip6-output", "interface-output", sw_if_index,
660 return /* no error */ 0;
663 VNET_SW_INTERFACE_ADD_DEL_FUNCTION (ip6_sw_interface_add_del);
666 ip6_lookup (vlib_main_t * vm,
667 vlib_node_runtime_t * node, vlib_frame_t * frame)
669 return ip6_lookup_inline (vm, node, frame);
672 static u8 *format_ip6_lookup_trace (u8 * s, va_list * args);
675 VLIB_REGISTER_NODE (ip6_lookup_node) =
677 .function = ip6_lookup,
678 .name = "ip6-lookup",
679 .vector_size = sizeof (u32),
680 .format_trace = format_ip6_lookup_trace,
681 .n_next_nodes = IP6_LOOKUP_N_NEXT,
682 .next_nodes = IP6_LOOKUP_NEXT_NODES,
686 VLIB_NODE_FUNCTION_MULTIARCH (ip6_lookup_node, ip6_lookup);
689 ip6_load_balance (vlib_main_t * vm,
690 vlib_node_runtime_t * node, vlib_frame_t * frame)
692 vlib_combined_counter_main_t *cm = &load_balance_main.lbm_via_counters;
693 u32 n_left_from, n_left_to_next, *from, *to_next;
694 ip_lookup_next_t next;
695 u32 cpu_index = os_get_cpu_number ();
696 ip6_main_t *im = &ip6_main;
698 from = vlib_frame_vector_args (frame);
699 n_left_from = frame->n_vectors;
700 next = node->cached_next_index;
702 if (node->flags & VLIB_NODE_FLAG_TRACE)
703 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
705 while (n_left_from > 0)
707 vlib_get_next_frame (vm, node, next, to_next, n_left_to_next);
710 while (n_left_from >= 4 && n_left_to_next >= 2)
712 ip_lookup_next_t next0, next1;
713 const load_balance_t *lb0, *lb1;
714 vlib_buffer_t *p0, *p1;
715 u32 pi0, lbi0, hc0, pi1, lbi1, hc1;
716 const ip6_header_t *ip0, *ip1;
717 const dpo_id_t *dpo0, *dpo1;
719 /* Prefetch next iteration. */
721 vlib_buffer_t *p2, *p3;
723 p2 = vlib_get_buffer (vm, from[2]);
724 p3 = vlib_get_buffer (vm, from[3]);
726 vlib_prefetch_buffer_header (p2, STORE);
727 vlib_prefetch_buffer_header (p3, STORE);
729 CLIB_PREFETCH (p2->data, sizeof (ip0[0]), STORE);
730 CLIB_PREFETCH (p3->data, sizeof (ip0[0]), STORE);
733 pi0 = to_next[0] = from[0];
734 pi1 = to_next[1] = from[1];
741 p0 = vlib_get_buffer (vm, pi0);
742 p1 = vlib_get_buffer (vm, pi1);
744 ip0 = vlib_buffer_get_current (p0);
745 ip1 = vlib_buffer_get_current (p1);
746 lbi0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
747 lbi1 = vnet_buffer (p1)->ip.adj_index[VLIB_TX];
749 lb0 = load_balance_get (lbi0);
750 lb1 = load_balance_get (lbi1);
753 * this node is for via FIBs we can re-use the hash value from the
754 * to node if present.
755 * We don't want to use the same hash value at each level in the recursion
756 * graph as that would lead to polarisation
758 hc0 = vnet_buffer (p0)->ip.flow_hash = 0;
759 hc1 = vnet_buffer (p1)->ip.flow_hash = 0;
761 if (PREDICT_FALSE (lb0->lb_n_buckets > 1))
763 if (PREDICT_TRUE (vnet_buffer (p0)->ip.flow_hash))
765 hc0 = vnet_buffer (p0)->ip.flow_hash =
766 vnet_buffer (p0)->ip.flow_hash >> 1;
770 hc0 = vnet_buffer (p0)->ip.flow_hash =
771 ip6_compute_flow_hash (ip0, hc0);
774 if (PREDICT_FALSE (lb1->lb_n_buckets > 1))
776 if (PREDICT_TRUE (vnet_buffer (p1)->ip.flow_hash))
778 hc1 = vnet_buffer (p1)->ip.flow_hash =
779 vnet_buffer (p1)->ip.flow_hash >> 1;
783 hc1 = vnet_buffer (p1)->ip.flow_hash =
784 ip6_compute_flow_hash (ip1, hc1);
789 load_balance_get_bucket_i (lb0,
790 hc0 & (lb0->lb_n_buckets_minus_1));
792 load_balance_get_bucket_i (lb1,
793 hc1 & (lb1->lb_n_buckets_minus_1));
795 next0 = dpo0->dpoi_next_node;
796 next1 = dpo1->dpoi_next_node;
798 /* Only process the HBH Option Header if explicitly configured to do so */
800 (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
802 next0 = (dpo_is_adj (dpo0) && im->hbh_enabled) ?
803 (ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next0;
805 /* Only process the HBH Option Header if explicitly configured to do so */
807 (ip1->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
809 next1 = (dpo_is_adj (dpo1) && im->hbh_enabled) ?
810 (ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next1;
813 vnet_buffer (p0)->ip.adj_index[VLIB_TX] = dpo0->dpoi_index;
814 vnet_buffer (p1)->ip.adj_index[VLIB_TX] = dpo1->dpoi_index;
816 vlib_increment_combined_counter
817 (cm, cpu_index, lbi0, 1, vlib_buffer_length_in_chain (vm, p0));
818 vlib_increment_combined_counter
819 (cm, cpu_index, lbi1, 1, vlib_buffer_length_in_chain (vm, p1));
821 vlib_validate_buffer_enqueue_x2 (vm, node, next,
822 to_next, n_left_to_next,
823 pi0, pi1, next0, next1);
826 while (n_left_from > 0 && n_left_to_next > 0)
828 ip_lookup_next_t next0;
829 const load_balance_t *lb0;
832 const ip6_header_t *ip0;
833 const dpo_id_t *dpo0;
842 p0 = vlib_get_buffer (vm, pi0);
844 ip0 = vlib_buffer_get_current (p0);
845 lbi0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
847 lb0 = load_balance_get (lbi0);
849 hc0 = vnet_buffer (p0)->ip.flow_hash = 0;
850 if (PREDICT_FALSE (lb0->lb_n_buckets > 1))
852 if (PREDICT_TRUE (vnet_buffer (p0)->ip.flow_hash))
854 hc0 = vnet_buffer (p0)->ip.flow_hash =
855 vnet_buffer (p0)->ip.flow_hash >> 1;
859 hc0 = vnet_buffer (p0)->ip.flow_hash =
860 ip6_compute_flow_hash (ip0, hc0);
864 load_balance_get_bucket_i (lb0,
865 hc0 & (lb0->lb_n_buckets_minus_1));
867 next0 = dpo0->dpoi_next_node;
868 vnet_buffer (p0)->ip.adj_index[VLIB_TX] = dpo0->dpoi_index;
870 /* Only process the HBH Option Header if explicitly configured to do so */
872 (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
874 next0 = (dpo_is_adj (dpo0) && im->hbh_enabled) ?
875 (ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next0;
878 vlib_increment_combined_counter
879 (cm, cpu_index, lbi0, 1, vlib_buffer_length_in_chain (vm, p0));
881 vlib_validate_buffer_enqueue_x1 (vm, node, next,
882 to_next, n_left_to_next,
886 vlib_put_next_frame (vm, node, next, n_left_to_next);
889 return frame->n_vectors;
893 VLIB_REGISTER_NODE (ip6_load_balance_node) =
895 .function = ip6_load_balance,
896 .name = "ip6-load-balance",
897 .vector_size = sizeof (u32),
898 .sibling_of = "ip6-lookup",
899 .format_trace = format_ip6_lookup_trace,
903 VLIB_NODE_FUNCTION_MULTIARCH (ip6_load_balance_node, ip6_load_balance);
907 /* Adjacency taken. */
912 /* Packet data, possibly *after* rewrite. */
913 u8 packet_data[128 - 1 * sizeof (u32)];
915 ip6_forward_next_trace_t;
918 format_ip6_forward_next_trace (u8 * s, va_list * args)
920 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
921 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
922 ip6_forward_next_trace_t *t = va_arg (*args, ip6_forward_next_trace_t *);
923 uword indent = format_get_indent (s);
925 s = format (s, "%U%U",
926 format_white_space, indent,
927 format_ip6_header, t->packet_data, sizeof (t->packet_data));
932 format_ip6_lookup_trace (u8 * s, va_list * args)
934 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
935 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
936 ip6_forward_next_trace_t *t = va_arg (*args, ip6_forward_next_trace_t *);
937 uword indent = format_get_indent (s);
939 s = format (s, "fib %d dpo-idx %d flow hash: 0x%08x",
940 t->fib_index, t->adj_index, t->flow_hash);
941 s = format (s, "\n%U%U",
942 format_white_space, indent,
943 format_ip6_header, t->packet_data, sizeof (t->packet_data));
949 format_ip6_rewrite_trace (u8 * s, va_list * args)
951 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
952 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
953 ip6_forward_next_trace_t *t = va_arg (*args, ip6_forward_next_trace_t *);
954 vnet_main_t *vnm = vnet_get_main ();
955 uword indent = format_get_indent (s);
957 s = format (s, "tx_sw_if_index %d adj-idx %d : %U flow hash: 0x%08x",
958 t->fib_index, t->adj_index, format_ip_adjacency,
959 t->adj_index, FORMAT_IP_ADJACENCY_NONE, t->flow_hash);
960 s = format (s, "\n%U%U",
961 format_white_space, indent,
962 format_ip_adjacency_packet_data,
963 vnm, t->adj_index, t->packet_data, sizeof (t->packet_data));
967 /* Common trace function for all ip6-forward next nodes. */
969 ip6_forward_next_trace (vlib_main_t * vm,
970 vlib_node_runtime_t * node,
971 vlib_frame_t * frame, vlib_rx_or_tx_t which_adj_index)
974 ip6_main_t *im = &ip6_main;
976 n_left = frame->n_vectors;
977 from = vlib_frame_vector_args (frame);
982 vlib_buffer_t *b0, *b1;
983 ip6_forward_next_trace_t *t0, *t1;
985 /* Prefetch next iteration. */
986 vlib_prefetch_buffer_with_index (vm, from[2], LOAD);
987 vlib_prefetch_buffer_with_index (vm, from[3], LOAD);
992 b0 = vlib_get_buffer (vm, bi0);
993 b1 = vlib_get_buffer (vm, bi1);
995 if (b0->flags & VLIB_BUFFER_IS_TRACED)
997 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
998 t0->adj_index = vnet_buffer (b0)->ip.adj_index[which_adj_index];
999 t0->flow_hash = vnet_buffer (b0)->ip.flow_hash;
1001 (vnet_buffer (b0)->sw_if_index[VLIB_TX] !=
1002 (u32) ~ 0) ? vnet_buffer (b0)->sw_if_index[VLIB_TX] :
1003 vec_elt (im->fib_index_by_sw_if_index,
1004 vnet_buffer (b0)->sw_if_index[VLIB_RX]);
1006 clib_memcpy (t0->packet_data,
1007 vlib_buffer_get_current (b0),
1008 sizeof (t0->packet_data));
1010 if (b1->flags & VLIB_BUFFER_IS_TRACED)
1012 t1 = vlib_add_trace (vm, node, b1, sizeof (t1[0]));
1013 t1->adj_index = vnet_buffer (b1)->ip.adj_index[which_adj_index];
1014 t1->flow_hash = vnet_buffer (b1)->ip.flow_hash;
1016 (vnet_buffer (b1)->sw_if_index[VLIB_TX] !=
1017 (u32) ~ 0) ? vnet_buffer (b1)->sw_if_index[VLIB_TX] :
1018 vec_elt (im->fib_index_by_sw_if_index,
1019 vnet_buffer (b1)->sw_if_index[VLIB_RX]);
1021 clib_memcpy (t1->packet_data,
1022 vlib_buffer_get_current (b1),
1023 sizeof (t1->packet_data));
1033 ip6_forward_next_trace_t *t0;
1037 b0 = vlib_get_buffer (vm, bi0);
1039 if (b0->flags & VLIB_BUFFER_IS_TRACED)
1041 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
1042 t0->adj_index = vnet_buffer (b0)->ip.adj_index[which_adj_index];
1043 t0->flow_hash = vnet_buffer (b0)->ip.flow_hash;
1045 (vnet_buffer (b0)->sw_if_index[VLIB_TX] !=
1046 (u32) ~ 0) ? vnet_buffer (b0)->sw_if_index[VLIB_TX] :
1047 vec_elt (im->fib_index_by_sw_if_index,
1048 vnet_buffer (b0)->sw_if_index[VLIB_RX]);
1050 clib_memcpy (t0->packet_data,
1051 vlib_buffer_get_current (b0),
1052 sizeof (t0->packet_data));
1060 ip6_drop_or_punt (vlib_main_t * vm,
1061 vlib_node_runtime_t * node,
1062 vlib_frame_t * frame, ip6_error_t error_code)
1064 u32 *buffers = vlib_frame_vector_args (frame);
1065 uword n_packets = frame->n_vectors;
1067 vlib_error_drop_buffers (vm, node, buffers,
1071 ip6_input_node.index, error_code);
1073 if (node->flags & VLIB_NODE_FLAG_TRACE)
1074 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
1080 ip6_drop (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
1082 return ip6_drop_or_punt (vm, node, frame, IP6_ERROR_ADJACENCY_DROP);
1086 ip6_punt (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
1088 return ip6_drop_or_punt (vm, node, frame, IP6_ERROR_ADJACENCY_PUNT);
1092 VLIB_REGISTER_NODE (ip6_drop_node, static) =
1094 .function = ip6_drop,
1096 .vector_size = sizeof (u32),
1097 .format_trace = format_ip6_forward_next_trace,
1101 [0] = "error-drop",},
1105 VLIB_NODE_FUNCTION_MULTIARCH (ip6_drop_node, ip6_drop);
1108 VLIB_REGISTER_NODE (ip6_punt_node, static) =
1110 .function = ip6_punt,
1112 .vector_size = sizeof (u32),
1113 .format_trace = format_ip6_forward_next_trace,
1117 [0] = "error-punt",},
1121 VLIB_NODE_FUNCTION_MULTIARCH (ip6_punt_node, ip6_punt);
1124 VLIB_REGISTER_NODE (ip6_multicast_node, static) =
1126 .function = ip6_drop,
1127 .name = "ip6-multicast",
1128 .vector_size = sizeof (u32),
1129 .format_trace = format_ip6_forward_next_trace,
1139 /* Compute TCP/UDP/ICMP6 checksum in software. */
1141 ip6_tcp_udp_icmp_compute_checksum (vlib_main_t * vm, vlib_buffer_t * p0,
1142 ip6_header_t * ip0, int *bogus_lengthp)
1145 u16 sum16, payload_length_host_byte_order;
1146 u32 i, n_this_buffer, n_bytes_left;
1147 u32 headers_size = sizeof (ip0[0]);
1148 void *data_this_buffer;
1150 ASSERT (bogus_lengthp);
1153 /* Initialize checksum with ip header. */
1154 sum0 = ip0->payload_length + clib_host_to_net_u16 (ip0->protocol);
1155 payload_length_host_byte_order = clib_net_to_host_u16 (ip0->payload_length);
1156 data_this_buffer = (void *) (ip0 + 1);
1158 for (i = 0; i < ARRAY_LEN (ip0->src_address.as_uword); i++)
1160 sum0 = ip_csum_with_carry (sum0,
1161 clib_mem_unaligned (&ip0->
1162 src_address.as_uword[i],
1165 ip_csum_with_carry (sum0,
1166 clib_mem_unaligned (&ip0->dst_address.as_uword[i],
1170 /* some icmp packets may come with a "router alert" hop-by-hop extension header (e.g., mldv2 packets) */
1171 if (PREDICT_FALSE (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
1174 ip6_hop_by_hop_ext_t *ext_hdr =
1175 (ip6_hop_by_hop_ext_t *) data_this_buffer;
1177 /* validate really icmp6 next */
1178 ASSERT (ext_hdr->next_hdr == IP_PROTOCOL_ICMP6);
1180 skip_bytes = 8 * (1 + ext_hdr->n_data_u64s);
1181 data_this_buffer = (void *) ((u8 *) data_this_buffer + skip_bytes);
1183 payload_length_host_byte_order -= skip_bytes;
1184 headers_size += skip_bytes;
1187 n_bytes_left = n_this_buffer = payload_length_host_byte_order;
1188 if (p0 && n_this_buffer + headers_size > p0->current_length)
1190 p0->current_length >
1191 headers_size ? p0->current_length - headers_size : 0;
1194 sum0 = ip_incremental_checksum (sum0, data_this_buffer, n_this_buffer);
1195 n_bytes_left -= n_this_buffer;
1196 if (n_bytes_left == 0)
1199 if (!(p0->flags & VLIB_BUFFER_NEXT_PRESENT))
1204 p0 = vlib_get_buffer (vm, p0->next_buffer);
1205 data_this_buffer = vlib_buffer_get_current (p0);
1206 n_this_buffer = p0->current_length;
1209 sum16 = ~ip_csum_fold (sum0);
1215 ip6_tcp_udp_icmp_validate_checksum (vlib_main_t * vm, vlib_buffer_t * p0)
1217 ip6_header_t *ip0 = vlib_buffer_get_current (p0);
1222 /* some icmp packets may come with a "router alert" hop-by-hop extension header (e.g., mldv2 packets) */
1223 ASSERT (ip0->protocol == IP_PROTOCOL_TCP
1224 || ip0->protocol == IP_PROTOCOL_ICMP6
1225 || ip0->protocol == IP_PROTOCOL_UDP
1226 || ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS);
1228 udp0 = (void *) (ip0 + 1);
1229 if (ip0->protocol == IP_PROTOCOL_UDP && udp0->checksum == 0)
1231 p0->flags |= (IP_BUFFER_L4_CHECKSUM_COMPUTED
1232 | IP_BUFFER_L4_CHECKSUM_CORRECT);
1236 sum16 = ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip0, &bogus_length);
1238 p0->flags |= (IP_BUFFER_L4_CHECKSUM_COMPUTED
1239 | ((sum16 == 0) << LOG2_IP_BUFFER_L4_CHECKSUM_CORRECT));
1244 /* ip6_locate_header
1246 * This function is to search for the header specified by the find_hdr number.
1247 * 1. If the find_hdr < 0 then it finds and returns the protocol number and
1248 * offset stored in *offset of the transport or ESP header in the chain if
1250 * 2. If a header with find_hdr > 0 protocol number is found then the
1251 * offset is stored in *offset and protocol number of the header is
1253 * 3. If find_hdr header is not found or packet is malformed or
1254 * it is a non-first fragment -1 is returned.
1257 ip6_locate_header (vlib_buffer_t * p0,
1258 ip6_header_t * ip0, int find_hdr, u32 * offset)
1260 u8 next_proto = ip0->protocol;
1264 u8 *temp_nxthdr = 0;
1267 next_header = ip6_next_header (ip0);
1268 cur_offset = sizeof (ip6_header_t);
1271 done = (next_proto == find_hdr);
1274 (u8 *) vlib_buffer_get_current (p0) + p0->current_length))
1276 //A malicious packet could set an extension header with a too big size
1281 if ((!ip6_ext_hdr (next_proto)) || next_proto == IP_PROTOCOL_IP6_NONXT)
1287 if (next_proto == IP_PROTOCOL_IPV6_FRAGMENTATION)
1289 ip6_frag_hdr_t *frag_hdr = (ip6_frag_hdr_t *) next_header;
1290 u16 frag_off = ip6_frag_hdr_offset (frag_hdr);
1291 /* Non first fragment return -1 */
1294 exthdr_len = sizeof (ip6_frag_hdr_t);
1295 temp_nxthdr = next_header + exthdr_len;
1297 else if (next_proto == IP_PROTOCOL_IPSEC_AH)
1300 ip6_ext_authhdr_len (((ip6_ext_header_t *) next_header));
1301 temp_nxthdr = next_header + exthdr_len;
1306 ip6_ext_header_len (((ip6_ext_header_t *) next_header));
1307 temp_nxthdr = next_header + exthdr_len;
1309 next_proto = ((ip6_ext_header_t *) next_header)->next_hdr;
1310 next_header = temp_nxthdr;
1311 cur_offset += exthdr_len;
1314 *offset = cur_offset;
1315 return (next_proto);
1319 ip6_local (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
1321 ip6_main_t *im = &ip6_main;
1322 ip_lookup_main_t *lm = &im->lookup_main;
1323 ip_local_next_t next_index;
1324 u32 *from, *to_next, n_left_from, n_left_to_next;
1325 vlib_node_runtime_t *error_node =
1326 vlib_node_get_runtime (vm, ip6_input_node.index);
1328 from = vlib_frame_vector_args (frame);
1329 n_left_from = frame->n_vectors;
1330 next_index = node->cached_next_index;
1332 if (node->flags & VLIB_NODE_FLAG_TRACE)
1333 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
1335 while (n_left_from > 0)
1337 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1339 while (n_left_from >= 4 && n_left_to_next >= 2)
1341 vlib_buffer_t *p0, *p1;
1342 ip6_header_t *ip0, *ip1;
1343 udp_header_t *udp0, *udp1;
1344 u32 pi0, ip_len0, udp_len0, flags0, next0;
1345 u32 pi1, ip_len1, udp_len1, flags1, next1;
1346 i32 len_diff0, len_diff1;
1347 u8 error0, type0, good_l4_checksum0;
1348 u8 error1, type1, good_l4_checksum1;
1349 u32 udp_offset0, udp_offset1;
1351 pi0 = to_next[0] = from[0];
1352 pi1 = to_next[1] = from[1];
1356 n_left_to_next -= 2;
1358 p0 = vlib_get_buffer (vm, pi0);
1359 p1 = vlib_get_buffer (vm, pi1);
1361 ip0 = vlib_buffer_get_current (p0);
1362 ip1 = vlib_buffer_get_current (p1);
1364 type0 = lm->builtin_protocol_by_ip_protocol[ip0->protocol];
1365 type1 = lm->builtin_protocol_by_ip_protocol[ip1->protocol];
1367 next0 = lm->local_next_by_ip_protocol[ip0->protocol];
1368 next1 = lm->local_next_by_ip_protocol[ip1->protocol];
1373 good_l4_checksum0 = (flags0 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0;
1374 good_l4_checksum1 = (flags1 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0;
1378 /* Skip HBH local processing */
1380 (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
1382 ip6_hop_by_hop_ext_t *ext_hdr =
1383 (ip6_hop_by_hop_ext_t *) ip6_next_header (ip0);
1384 next0 = lm->local_next_by_ip_protocol[ext_hdr->next_hdr];
1385 type0 = lm->builtin_protocol_by_ip_protocol[ext_hdr->next_hdr];
1388 (ip1->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
1390 ip6_hop_by_hop_ext_t *ext_hdr =
1391 (ip6_hop_by_hop_ext_t *) ip6_next_header (ip1);
1392 next1 = lm->local_next_by_ip_protocol[ext_hdr->next_hdr];
1393 type1 = lm->builtin_protocol_by_ip_protocol[ext_hdr->next_hdr];
1395 if (PREDICT_TRUE (IP_PROTOCOL_UDP == ip6_locate_header (p0, ip0,
1399 udp0 = (udp_header_t *) ((u8 *) ip0 + udp_offset0);
1400 /* Don't verify UDP checksum for packets with explicit zero checksum. */
1401 good_l4_checksum0 |= type0 == IP_BUILTIN_PROTOCOL_UDP
1402 && udp0->checksum == 0;
1403 /* Verify UDP length. */
1404 ip_len0 = clib_net_to_host_u16 (ip0->payload_length);
1405 udp_len0 = clib_net_to_host_u16 (udp0->length);
1406 len_diff0 = ip_len0 - udp_len0;
1408 if (PREDICT_TRUE (IP_PROTOCOL_UDP == ip6_locate_header (p1, ip1,
1412 udp1 = (udp_header_t *) ((u8 *) ip1 + udp_offset1);
1413 /* Don't verify UDP checksum for packets with explicit zero checksum. */
1414 good_l4_checksum1 |= type1 == IP_BUILTIN_PROTOCOL_UDP
1415 && udp1->checksum == 0;
1416 /* Verify UDP length. */
1417 ip_len1 = clib_net_to_host_u16 (ip1->payload_length);
1418 udp_len1 = clib_net_to_host_u16 (udp1->length);
1419 len_diff1 = ip_len1 - udp_len1;
1422 good_l4_checksum0 |= type0 == IP_BUILTIN_PROTOCOL_UNKNOWN;
1423 good_l4_checksum1 |= type1 == IP_BUILTIN_PROTOCOL_UNKNOWN;
1425 len_diff0 = type0 == IP_BUILTIN_PROTOCOL_UDP ? len_diff0 : 0;
1426 len_diff1 = type1 == IP_BUILTIN_PROTOCOL_UDP ? len_diff1 : 0;
1428 if (PREDICT_FALSE (type0 != IP_BUILTIN_PROTOCOL_UNKNOWN
1429 && !good_l4_checksum0
1430 && !(flags0 & IP_BUFFER_L4_CHECKSUM_COMPUTED)))
1432 flags0 = ip6_tcp_udp_icmp_validate_checksum (vm, p0);
1434 (flags0 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0;
1436 if (PREDICT_FALSE (type1 != IP_BUILTIN_PROTOCOL_UNKNOWN
1437 && !good_l4_checksum1
1438 && !(flags1 & IP_BUFFER_L4_CHECKSUM_COMPUTED)))
1440 flags1 = ip6_tcp_udp_icmp_validate_checksum (vm, p1);
1442 (flags1 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0;
1445 error0 = error1 = IP6_ERROR_UNKNOWN_PROTOCOL;
1447 error0 = len_diff0 < 0 ? IP6_ERROR_UDP_LENGTH : error0;
1448 error1 = len_diff1 < 0 ? IP6_ERROR_UDP_LENGTH : error1;
1450 ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_UDP ==
1451 IP6_ERROR_UDP_CHECKSUM);
1452 ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_ICMP ==
1453 IP6_ERROR_ICMP_CHECKSUM);
1455 (!good_l4_checksum0 ? IP6_ERROR_UDP_CHECKSUM + type0 : error0);
1457 (!good_l4_checksum1 ? IP6_ERROR_UDP_CHECKSUM + type1 : error1);
1459 /* Drop packets from unroutable hosts. */
1460 /* If this is a neighbor solicitation (ICMP), skip source RPF check */
1461 if (error0 == IP6_ERROR_UNKNOWN_PROTOCOL &&
1462 type0 != IP_BUILTIN_PROTOCOL_ICMP &&
1463 !ip6_address_is_link_local_unicast (&ip0->src_address))
1465 u32 src_adj_index0 = ip6_src_lookup_for_packet (im, p0, ip0);
1466 error0 = (ADJ_INDEX_INVALID == src_adj_index0
1467 ? IP6_ERROR_SRC_LOOKUP_MISS : error0);
1469 if (error1 == IP6_ERROR_UNKNOWN_PROTOCOL &&
1470 type1 != IP_BUILTIN_PROTOCOL_ICMP &&
1471 !ip6_address_is_link_local_unicast (&ip1->src_address))
1473 u32 src_adj_index1 = ip6_src_lookup_for_packet (im, p1, ip1);
1474 error1 = (ADJ_INDEX_INVALID == src_adj_index1
1475 ? IP6_ERROR_SRC_LOOKUP_MISS : error1);
1479 error0 != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next0;
1481 error1 != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next1;
1483 p0->error = error_node->errors[error0];
1484 p1->error = error_node->errors[error1];
1486 vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
1487 to_next, n_left_to_next,
1488 pi0, pi1, next0, next1);
1491 while (n_left_from > 0 && n_left_to_next > 0)
1496 u32 pi0, ip_len0, udp_len0, flags0, next0;
1498 u8 error0, type0, good_l4_checksum0;
1501 pi0 = to_next[0] = from[0];
1505 n_left_to_next -= 1;
1507 p0 = vlib_get_buffer (vm, pi0);
1509 ip0 = vlib_buffer_get_current (p0);
1511 type0 = lm->builtin_protocol_by_ip_protocol[ip0->protocol];
1512 next0 = lm->local_next_by_ip_protocol[ip0->protocol];
1516 good_l4_checksum0 = (flags0 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0;
1519 /* Skip HBH local processing */
1521 (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
1523 ip6_hop_by_hop_ext_t *ext_hdr =
1524 (ip6_hop_by_hop_ext_t *) ip6_next_header (ip0);
1525 next0 = lm->local_next_by_ip_protocol[ext_hdr->next_hdr];
1526 type0 = lm->builtin_protocol_by_ip_protocol[ext_hdr->next_hdr];
1528 if (PREDICT_TRUE (IP_PROTOCOL_UDP == ip6_locate_header (p0, ip0,
1532 udp0 = (udp_header_t *) ((u8 *) ip0 + udp_offset0);
1533 /* Don't verify UDP checksum for packets with explicit zero checksum. */
1534 good_l4_checksum0 |= type0 == IP_BUILTIN_PROTOCOL_UDP
1535 && udp0->checksum == 0;
1536 /* Verify UDP length. */
1537 ip_len0 = clib_net_to_host_u16 (ip0->payload_length);
1538 udp_len0 = clib_net_to_host_u16 (udp0->length);
1539 len_diff0 = ip_len0 - udp_len0;
1542 good_l4_checksum0 |= type0 == IP_BUILTIN_PROTOCOL_UNKNOWN;
1543 len_diff0 = type0 == IP_BUILTIN_PROTOCOL_UDP ? len_diff0 : 0;
1545 if (PREDICT_FALSE (type0 != IP_BUILTIN_PROTOCOL_UNKNOWN
1546 && !good_l4_checksum0
1547 && !(flags0 & IP_BUFFER_L4_CHECKSUM_COMPUTED)))
1549 flags0 = ip6_tcp_udp_icmp_validate_checksum (vm, p0);
1551 (flags0 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0;
1554 error0 = IP6_ERROR_UNKNOWN_PROTOCOL;
1556 error0 = len_diff0 < 0 ? IP6_ERROR_UDP_LENGTH : error0;
1558 ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_UDP ==
1559 IP6_ERROR_UDP_CHECKSUM);
1560 ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_ICMP ==
1561 IP6_ERROR_ICMP_CHECKSUM);
1563 (!good_l4_checksum0 ? IP6_ERROR_UDP_CHECKSUM + type0 : error0);
1565 /* If this is a neighbor solicitation (ICMP), skip source RPF check */
1566 if (error0 == IP6_ERROR_UNKNOWN_PROTOCOL &&
1567 type0 != IP_BUILTIN_PROTOCOL_ICMP &&
1568 !ip6_address_is_link_local_unicast (&ip0->src_address))
1570 u32 src_adj_index0 = ip6_src_lookup_for_packet (im, p0, ip0);
1571 error0 = (ADJ_INDEX_INVALID == src_adj_index0
1572 ? IP6_ERROR_SRC_LOOKUP_MISS : error0);
1576 error0 != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next0;
1578 p0->error = error_node->errors[error0];
1580 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1581 to_next, n_left_to_next,
1585 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1588 return frame->n_vectors;
1592 VLIB_REGISTER_NODE (ip6_local_node, static) =
1594 .function = ip6_local,
1595 .name = "ip6-local",
1596 .vector_size = sizeof (u32),
1597 .format_trace = format_ip6_forward_next_trace,
1598 .n_next_nodes = IP_LOCAL_N_NEXT,
1601 [IP_LOCAL_NEXT_DROP] = "error-drop",
1602 [IP_LOCAL_NEXT_PUNT] = "error-punt",
1603 [IP_LOCAL_NEXT_UDP_LOOKUP] = "ip6-udp-lookup",
1604 [IP_LOCAL_NEXT_ICMP] = "ip6-icmp-input",
1609 VLIB_NODE_FUNCTION_MULTIARCH (ip6_local_node, ip6_local);
1612 ip6_register_protocol (u32 protocol, u32 node_index)
1614 vlib_main_t *vm = vlib_get_main ();
1615 ip6_main_t *im = &ip6_main;
1616 ip_lookup_main_t *lm = &im->lookup_main;
1618 ASSERT (protocol < ARRAY_LEN (lm->local_next_by_ip_protocol));
1619 lm->local_next_by_ip_protocol[protocol] =
1620 vlib_node_add_next (vm, ip6_local_node.index, node_index);
1625 IP6_DISCOVER_NEIGHBOR_NEXT_DROP,
1626 IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX,
1627 IP6_DISCOVER_NEIGHBOR_N_NEXT,
1628 } ip6_discover_neighbor_next_t;
1632 IP6_DISCOVER_NEIGHBOR_ERROR_DROP,
1633 IP6_DISCOVER_NEIGHBOR_ERROR_REQUEST_SENT,
1634 IP6_DISCOVER_NEIGHBOR_ERROR_NO_SOURCE_ADDRESS,
1635 } ip6_discover_neighbor_error_t;
1638 ip6_discover_neighbor_inline (vlib_main_t * vm,
1639 vlib_node_runtime_t * node,
1640 vlib_frame_t * frame, int is_glean)
1642 vnet_main_t *vnm = vnet_get_main ();
1643 ip6_main_t *im = &ip6_main;
1644 ip_lookup_main_t *lm = &im->lookup_main;
1645 u32 *from, *to_next_drop;
1646 uword n_left_from, n_left_to_next_drop;
1647 static f64 time_last_seed_change = -1e100;
1648 static u32 hash_seeds[3];
1649 static uword hash_bitmap[256 / BITS (uword)];
1653 if (node->flags & VLIB_NODE_FLAG_TRACE)
1654 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
1656 time_now = vlib_time_now (vm);
1657 if (time_now - time_last_seed_change > 1e-3)
1660 u32 *r = clib_random_buffer_get_data (&vm->random_buffer,
1661 sizeof (hash_seeds));
1662 for (i = 0; i < ARRAY_LEN (hash_seeds); i++)
1663 hash_seeds[i] = r[i];
1665 /* Mark all hash keys as been not-seen before. */
1666 for (i = 0; i < ARRAY_LEN (hash_bitmap); i++)
1669 time_last_seed_change = time_now;
1672 from = vlib_frame_vector_args (frame);
1673 n_left_from = frame->n_vectors;
1675 while (n_left_from > 0)
1677 vlib_get_next_frame (vm, node, IP6_DISCOVER_NEIGHBOR_NEXT_DROP,
1678 to_next_drop, n_left_to_next_drop);
1680 while (n_left_from > 0 && n_left_to_next_drop > 0)
1684 u32 pi0, adj_index0, a0, b0, c0, m0, sw_if_index0, drop0;
1686 ip_adjacency_t *adj0;
1687 vnet_hw_interface_t *hw_if0;
1692 p0 = vlib_get_buffer (vm, pi0);
1694 adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
1696 ip0 = vlib_buffer_get_current (p0);
1698 adj0 = ip_get_adjacency (lm, adj_index0);
1702 ip0->dst_address.as_u64[0] =
1703 adj0->sub_type.nbr.next_hop.ip6.as_u64[0];
1704 ip0->dst_address.as_u64[1] =
1705 adj0->sub_type.nbr.next_hop.ip6.as_u64[1];
1712 sw_if_index0 = adj0->rewrite_header.sw_if_index;
1713 vnet_buffer (p0)->sw_if_index[VLIB_TX] = sw_if_index0;
1716 b0 ^= ip0->dst_address.as_u32[0];
1717 c0 ^= ip0->dst_address.as_u32[1];
1719 hash_v3_mix32 (a0, b0, c0);
1721 b0 ^= ip0->dst_address.as_u32[2];
1722 c0 ^= ip0->dst_address.as_u32[3];
1724 hash_v3_finalize32 (a0, b0, c0);
1726 c0 &= BITS (hash_bitmap) - 1;
1727 c0 = c0 / BITS (uword);
1728 m0 = (uword) 1 << (c0 % BITS (uword));
1730 bm0 = hash_bitmap[c0];
1731 drop0 = (bm0 & m0) != 0;
1733 /* Mark it as seen. */
1734 hash_bitmap[c0] = bm0 | m0;
1738 to_next_drop[0] = pi0;
1740 n_left_to_next_drop -= 1;
1742 hw_if0 = vnet_get_sup_hw_interface (vnm, sw_if_index0);
1744 /* If the interface is link-down, drop the pkt */
1745 if (!(hw_if0->flags & VNET_HW_INTERFACE_FLAG_LINK_UP))
1749 node->errors[drop0 ? IP6_DISCOVER_NEIGHBOR_ERROR_DROP
1750 : IP6_DISCOVER_NEIGHBOR_ERROR_REQUEST_SENT];
1755 * the adj has been updated to a rewrite but the node the DPO that got
1756 * us here hasn't - yet. no big deal. we'll drop while we wait.
1758 if (IP_LOOKUP_NEXT_REWRITE == adj0->lookup_next_index)
1763 icmp6_neighbor_solicitation_header_t *h0;
1766 h0 = vlib_packet_template_get_packet
1767 (vm, &im->discover_neighbor_packet_template, &bi0);
1770 * Build ethernet header.
1771 * Choose source address based on destination lookup
1774 if (ip6_src_address_for_packet (lm,
1776 &h0->ip.src_address))
1778 /* There is no address on the interface */
1780 node->errors[IP6_DISCOVER_NEIGHBOR_ERROR_NO_SOURCE_ADDRESS];
1781 vlib_buffer_free (vm, &bi0, 1);
1786 * Destination address is a solicited node multicast address.
1787 * We need to fill in
1788 * the low 24 bits with low 24 bits of target's address.
1790 h0->ip.dst_address.as_u8[13] = ip0->dst_address.as_u8[13];
1791 h0->ip.dst_address.as_u8[14] = ip0->dst_address.as_u8[14];
1792 h0->ip.dst_address.as_u8[15] = ip0->dst_address.as_u8[15];
1794 h0->neighbor.target_address = ip0->dst_address;
1796 clib_memcpy (h0->link_layer_option.ethernet_address,
1797 hw_if0->hw_address, vec_len (hw_if0->hw_address));
1799 /* $$$$ appears we need this; why is the checksum non-zero? */
1800 h0->neighbor.icmp.checksum = 0;
1801 h0->neighbor.icmp.checksum =
1802 ip6_tcp_udp_icmp_compute_checksum (vm, 0, &h0->ip,
1805 ASSERT (bogus_length == 0);
1807 vlib_buffer_copy_trace_flag (vm, p0, bi0);
1808 b0 = vlib_get_buffer (vm, bi0);
1809 vnet_buffer (b0)->sw_if_index[VLIB_TX]
1810 = vnet_buffer (p0)->sw_if_index[VLIB_TX];
1812 /* Add rewrite/encap string. */
1813 vnet_rewrite_one_header (adj0[0], h0, sizeof (ethernet_header_t));
1814 vlib_buffer_advance (b0, -adj0->rewrite_header.data_bytes);
1816 next0 = IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX;
1818 vlib_set_next_frame_buffer (vm, node, next0, bi0);
1822 vlib_put_next_frame (vm, node, IP6_DISCOVER_NEIGHBOR_NEXT_DROP,
1823 n_left_to_next_drop);
1826 return frame->n_vectors;
1830 ip6_discover_neighbor (vlib_main_t * vm,
1831 vlib_node_runtime_t * node, vlib_frame_t * frame)
1833 return (ip6_discover_neighbor_inline (vm, node, frame, 0));
1837 ip6_glean (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
1839 return (ip6_discover_neighbor_inline (vm, node, frame, 1));
1842 static char *ip6_discover_neighbor_error_strings[] = {
1843 [IP6_DISCOVER_NEIGHBOR_ERROR_DROP] = "address overflow drops",
1844 [IP6_DISCOVER_NEIGHBOR_ERROR_REQUEST_SENT] = "neighbor solicitations sent",
1845 [IP6_DISCOVER_NEIGHBOR_ERROR_NO_SOURCE_ADDRESS]
1846 = "no source address for ND solicitation",
1850 VLIB_REGISTER_NODE (ip6_discover_neighbor_node) =
1852 .function = ip6_discover_neighbor,
1853 .name = "ip6-discover-neighbor",
1854 .vector_size = sizeof (u32),
1855 .format_trace = format_ip6_forward_next_trace,
1856 .n_errors = ARRAY_LEN (ip6_discover_neighbor_error_strings),
1857 .error_strings = ip6_discover_neighbor_error_strings,
1858 .n_next_nodes = IP6_DISCOVER_NEIGHBOR_N_NEXT,
1861 [IP6_DISCOVER_NEIGHBOR_NEXT_DROP] = "error-drop",
1862 [IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX] = "interface-output",
1868 VLIB_REGISTER_NODE (ip6_glean_node) =
1870 .function = ip6_glean,
1871 .name = "ip6-glean",
1872 .vector_size = sizeof (u32),
1873 .format_trace = format_ip6_forward_next_trace,
1874 .n_errors = ARRAY_LEN (ip6_discover_neighbor_error_strings),
1875 .error_strings = ip6_discover_neighbor_error_strings,
1876 .n_next_nodes = IP6_DISCOVER_NEIGHBOR_N_NEXT,
1879 [IP6_DISCOVER_NEIGHBOR_NEXT_DROP] = "error-drop",
1880 [IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX] = "interface-output",
1886 ip6_probe_neighbor (vlib_main_t * vm, ip6_address_t * dst, u32 sw_if_index)
1888 vnet_main_t *vnm = vnet_get_main ();
1889 ip6_main_t *im = &ip6_main;
1890 icmp6_neighbor_solicitation_header_t *h;
1892 ip_interface_address_t *ia;
1893 ip_adjacency_t *adj;
1894 vnet_hw_interface_t *hi;
1895 vnet_sw_interface_t *si;
1900 si = vnet_get_sw_interface (vnm, sw_if_index);
1902 if (!(si->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP))
1904 return clib_error_return (0, "%U: interface %U down",
1905 format_ip6_address, dst,
1906 format_vnet_sw_if_index_name, vnm,
1911 ip6_interface_address_matching_destination (im, dst, sw_if_index, &ia);
1914 vnm->api_errno = VNET_API_ERROR_NO_MATCHING_INTERFACE;
1915 return clib_error_return
1916 (0, "no matching interface address for destination %U (interface %U)",
1917 format_ip6_address, dst,
1918 format_vnet_sw_if_index_name, vnm, sw_if_index);
1922 vlib_packet_template_get_packet (vm,
1923 &im->discover_neighbor_packet_template,
1926 hi = vnet_get_sup_hw_interface (vnm, sw_if_index);
1928 /* Destination address is a solicited node multicast address. We need to fill in
1929 the low 24 bits with low 24 bits of target's address. */
1930 h->ip.dst_address.as_u8[13] = dst->as_u8[13];
1931 h->ip.dst_address.as_u8[14] = dst->as_u8[14];
1932 h->ip.dst_address.as_u8[15] = dst->as_u8[15];
1934 h->ip.src_address = src[0];
1935 h->neighbor.target_address = dst[0];
1937 clib_memcpy (h->link_layer_option.ethernet_address, hi->hw_address,
1938 vec_len (hi->hw_address));
1940 h->neighbor.icmp.checksum =
1941 ip6_tcp_udp_icmp_compute_checksum (vm, 0, &h->ip, &bogus_length);
1942 ASSERT (bogus_length == 0);
1944 b = vlib_get_buffer (vm, bi);
1945 vnet_buffer (b)->sw_if_index[VLIB_RX] =
1946 vnet_buffer (b)->sw_if_index[VLIB_TX] = sw_if_index;
1948 /* Add encapsulation string for software interface (e.g. ethernet header). */
1949 adj = ip_get_adjacency (&im->lookup_main, ia->neighbor_probe_adj_index);
1950 vnet_rewrite_one_header (adj[0], h, sizeof (ethernet_header_t));
1951 vlib_buffer_advance (b, -adj->rewrite_header.data_bytes);
1954 vlib_frame_t *f = vlib_get_frame_to_node (vm, hi->output_node_index);
1955 u32 *to_next = vlib_frame_vector_args (f);
1958 vlib_put_frame_to_node (vm, hi->output_node_index, f);
1961 return /* no error */ 0;
1966 IP6_REWRITE_NEXT_DROP,
1967 IP6_REWRITE_NEXT_ICMP_ERROR,
1968 } ip6_rewrite_next_t;
1971 ip6_rewrite_inline (vlib_main_t * vm,
1972 vlib_node_runtime_t * node,
1973 vlib_frame_t * frame, int is_midchain)
1975 ip_lookup_main_t *lm = &ip6_main.lookup_main;
1976 u32 *from = vlib_frame_vector_args (frame);
1977 u32 n_left_from, n_left_to_next, *to_next, next_index;
1978 vlib_node_runtime_t *error_node =
1979 vlib_node_get_runtime (vm, ip6_input_node.index);
1981 n_left_from = frame->n_vectors;
1982 next_index = node->cached_next_index;
1983 u32 cpu_index = os_get_cpu_number ();
1985 while (n_left_from > 0)
1987 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1989 while (n_left_from >= 4 && n_left_to_next >= 2)
1991 ip_adjacency_t *adj0, *adj1;
1992 vlib_buffer_t *p0, *p1;
1993 ip6_header_t *ip0, *ip1;
1994 u32 pi0, rw_len0, next0, error0, adj_index0;
1995 u32 pi1, rw_len1, next1, error1, adj_index1;
1996 u32 tx_sw_if_index0, tx_sw_if_index1;
1998 /* Prefetch next iteration. */
2000 vlib_buffer_t *p2, *p3;
2002 p2 = vlib_get_buffer (vm, from[2]);
2003 p3 = vlib_get_buffer (vm, from[3]);
2005 vlib_prefetch_buffer_header (p2, LOAD);
2006 vlib_prefetch_buffer_header (p3, LOAD);
2008 CLIB_PREFETCH (p2->pre_data, 32, STORE);
2009 CLIB_PREFETCH (p3->pre_data, 32, STORE);
2011 CLIB_PREFETCH (p2->data, sizeof (ip0[0]), STORE);
2012 CLIB_PREFETCH (p3->data, sizeof (ip0[0]), STORE);
2015 pi0 = to_next[0] = from[0];
2016 pi1 = to_next[1] = from[1];
2021 n_left_to_next -= 2;
2023 p0 = vlib_get_buffer (vm, pi0);
2024 p1 = vlib_get_buffer (vm, pi1);
2026 adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
2027 adj_index1 = vnet_buffer (p1)->ip.adj_index[VLIB_TX];
2029 /* We should never rewrite a pkt using the MISS adjacency */
2030 ASSERT (adj_index0 && adj_index1);
2032 ip0 = vlib_buffer_get_current (p0);
2033 ip1 = vlib_buffer_get_current (p1);
2035 error0 = error1 = IP6_ERROR_NONE;
2036 next0 = next1 = IP6_REWRITE_NEXT_DROP;
2038 if (PREDICT_TRUE (!(p0->flags & VNET_BUFFER_LOCALLY_ORIGINATED)))
2040 i32 hop_limit0 = ip0->hop_limit;
2042 /* Input node should have reject packets with hop limit 0. */
2043 ASSERT (ip0->hop_limit > 0);
2047 ip0->hop_limit = hop_limit0;
2050 * If the hop count drops below 1 when forwarding, generate
2053 if (PREDICT_FALSE (hop_limit0 <= 0))
2055 error0 = IP6_ERROR_TIME_EXPIRED;
2056 next0 = IP6_REWRITE_NEXT_ICMP_ERROR;
2057 vnet_buffer (p0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
2058 icmp6_error_set_vnet_buffer (p0, ICMP6_time_exceeded,
2059 ICMP6_time_exceeded_ttl_exceeded_in_transit,
2065 p0->flags &= ~VNET_BUFFER_LOCALLY_ORIGINATED;
2067 if (PREDICT_TRUE (!(p1->flags & VNET_BUFFER_LOCALLY_ORIGINATED)))
2069 i32 hop_limit1 = ip1->hop_limit;
2071 /* Input node should have reject packets with hop limit 0. */
2072 ASSERT (ip1->hop_limit > 0);
2076 ip1->hop_limit = hop_limit1;
2079 * If the hop count drops below 1 when forwarding, generate
2082 if (PREDICT_FALSE (hop_limit1 <= 0))
2084 error1 = IP6_ERROR_TIME_EXPIRED;
2085 next1 = IP6_REWRITE_NEXT_ICMP_ERROR;
2086 vnet_buffer (p1)->sw_if_index[VLIB_TX] = (u32) ~ 0;
2087 icmp6_error_set_vnet_buffer (p1, ICMP6_time_exceeded,
2088 ICMP6_time_exceeded_ttl_exceeded_in_transit,
2094 p1->flags &= ~VNET_BUFFER_LOCALLY_ORIGINATED;
2096 adj0 = ip_get_adjacency (lm, adj_index0);
2097 adj1 = ip_get_adjacency (lm, adj_index1);
2099 rw_len0 = adj0[0].rewrite_header.data_bytes;
2100 rw_len1 = adj1[0].rewrite_header.data_bytes;
2101 vnet_buffer (p0)->ip.save_rewrite_length = rw_len0;
2102 vnet_buffer (p1)->ip.save_rewrite_length = rw_len1;
2104 vlib_increment_combined_counter (&adjacency_counters,
2105 cpu_index, adj_index0,
2106 /* packet increment */ 0,
2107 /* byte increment */ rw_len0);
2108 vlib_increment_combined_counter (&adjacency_counters,
2109 cpu_index, adj_index1,
2110 /* packet increment */ 0,
2111 /* byte increment */ rw_len1);
2113 /* Check MTU of outgoing interface. */
2115 (vlib_buffer_length_in_chain (vm, p0) >
2117 rewrite_header.max_l3_packet_bytes ? IP6_ERROR_MTU_EXCEEDED :
2120 (vlib_buffer_length_in_chain (vm, p1) >
2122 rewrite_header.max_l3_packet_bytes ? IP6_ERROR_MTU_EXCEEDED :
2125 /* Don't adjust the buffer for hop count issue; icmp-error node
2126 * wants to see the IP headerr */
2127 if (PREDICT_TRUE (error0 == IP6_ERROR_NONE))
2129 p0->current_data -= rw_len0;
2130 p0->current_length += rw_len0;
2132 tx_sw_if_index0 = adj0[0].rewrite_header.sw_if_index;
2133 vnet_buffer (p0)->sw_if_index[VLIB_TX] = tx_sw_if_index0;
2134 next0 = adj0[0].rewrite_header.next_index;
2136 vnet_feature_arc_start (lm->output_feature_arc_index,
2137 tx_sw_if_index0, &next0, p0);
2139 if (PREDICT_TRUE (error1 == IP6_ERROR_NONE))
2141 p1->current_data -= rw_len1;
2142 p1->current_length += rw_len1;
2144 tx_sw_if_index1 = adj1[0].rewrite_header.sw_if_index;
2145 vnet_buffer (p1)->sw_if_index[VLIB_TX] = tx_sw_if_index1;
2146 next1 = adj1[0].rewrite_header.next_index;
2148 vnet_feature_arc_start (lm->output_feature_arc_index,
2149 tx_sw_if_index1, &next1, p1);
2152 /* Guess we are only writing on simple Ethernet header. */
2153 vnet_rewrite_two_headers (adj0[0], adj1[0],
2154 ip0, ip1, sizeof (ethernet_header_t));
2158 adj0->sub_type.midchain.fixup_func (vm, adj0, p0);
2159 adj1->sub_type.midchain.fixup_func (vm, adj1, p1);
2162 vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
2163 to_next, n_left_to_next,
2164 pi0, pi1, next0, next1);
2167 while (n_left_from > 0 && n_left_to_next > 0)
2169 ip_adjacency_t *adj0;
2173 u32 adj_index0, next0, error0;
2174 u32 tx_sw_if_index0;
2176 pi0 = to_next[0] = from[0];
2178 p0 = vlib_get_buffer (vm, pi0);
2180 adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
2182 /* We should never rewrite a pkt using the MISS adjacency */
2183 ASSERT (adj_index0);
2185 adj0 = ip_get_adjacency (lm, adj_index0);
2187 ip0 = vlib_buffer_get_current (p0);
2189 error0 = IP6_ERROR_NONE;
2190 next0 = IP6_REWRITE_NEXT_DROP;
2192 /* Check hop limit */
2193 if (PREDICT_TRUE (!(p0->flags & VNET_BUFFER_LOCALLY_ORIGINATED)))
2195 i32 hop_limit0 = ip0->hop_limit;
2197 ASSERT (ip0->hop_limit > 0);
2201 ip0->hop_limit = hop_limit0;
2203 if (PREDICT_FALSE (hop_limit0 <= 0))
2206 * If the hop count drops below 1 when forwarding, generate
2209 error0 = IP6_ERROR_TIME_EXPIRED;
2210 next0 = IP6_REWRITE_NEXT_ICMP_ERROR;
2211 vnet_buffer (p0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
2212 icmp6_error_set_vnet_buffer (p0, ICMP6_time_exceeded,
2213 ICMP6_time_exceeded_ttl_exceeded_in_transit,
2219 p0->flags &= ~VNET_BUFFER_LOCALLY_ORIGINATED;
2222 /* Guess we are only writing on simple Ethernet header. */
2223 vnet_rewrite_one_header (adj0[0], ip0, sizeof (ethernet_header_t));
2225 /* Update packet buffer attributes/set output interface. */
2226 rw_len0 = adj0[0].rewrite_header.data_bytes;
2227 vnet_buffer (p0)->ip.save_rewrite_length = rw_len0;
2229 vlib_increment_combined_counter (&adjacency_counters,
2230 cpu_index, adj_index0,
2231 /* packet increment */ 0,
2232 /* byte increment */ rw_len0);
2234 /* Check MTU of outgoing interface. */
2236 (vlib_buffer_length_in_chain (vm, p0) >
2238 rewrite_header.max_l3_packet_bytes ? IP6_ERROR_MTU_EXCEEDED :
2241 /* Don't adjust the buffer for hop count issue; icmp-error node
2242 * wants to see the IP headerr */
2243 if (PREDICT_TRUE (error0 == IP6_ERROR_NONE))
2245 p0->current_data -= rw_len0;
2246 p0->current_length += rw_len0;
2248 tx_sw_if_index0 = adj0[0].rewrite_header.sw_if_index;
2250 vnet_buffer (p0)->sw_if_index[VLIB_TX] = tx_sw_if_index0;
2251 next0 = adj0[0].rewrite_header.next_index;
2253 vnet_feature_arc_start (lm->output_feature_arc_index,
2254 tx_sw_if_index0, &next0, p0);
2259 adj0->sub_type.midchain.fixup_func (vm, adj0, p0);
2262 p0->error = error_node->errors[error0];
2267 n_left_to_next -= 1;
2269 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
2270 to_next, n_left_to_next,
2274 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2277 /* Need to do trace after rewrites to pick up new packet data. */
2278 if (node->flags & VLIB_NODE_FLAG_TRACE)
2279 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
2281 return frame->n_vectors;
2285 ip6_rewrite (vlib_main_t * vm,
2286 vlib_node_runtime_t * node, vlib_frame_t * frame)
2288 return ip6_rewrite_inline (vm, node, frame,
2293 ip6_midchain (vlib_main_t * vm,
2294 vlib_node_runtime_t * node, vlib_frame_t * frame)
2296 return ip6_rewrite_inline (vm, node, frame,
2301 VLIB_REGISTER_NODE (ip6_midchain_node) =
2303 .function = ip6_midchain,
2304 .name = "ip6-midchain",
2305 .vector_size = sizeof (u32),
2306 .format_trace = format_ip6_forward_next_trace,
2307 .sibling_of = "ip6-rewrite",
2311 VLIB_NODE_FUNCTION_MULTIARCH (ip6_midchain_node, ip6_midchain);
2314 VLIB_REGISTER_NODE (ip6_rewrite_node) =
2316 .function = ip6_rewrite,
2317 .name = "ip6-rewrite",
2318 .vector_size = sizeof (u32),
2319 .format_trace = format_ip6_rewrite_trace,
2323 [IP6_REWRITE_NEXT_DROP] = "error-drop",
2324 [IP6_REWRITE_NEXT_ICMP_ERROR] = "ip6-icmp-error",
2329 VLIB_NODE_FUNCTION_MULTIARCH (ip6_rewrite_node, ip6_rewrite);
2332 * Hop-by-Hop handling
2335 ip6_hop_by_hop_main_t ip6_hop_by_hop_main;
2337 #define foreach_ip6_hop_by_hop_error \
2338 _(PROCESSED, "pkts with ip6 hop-by-hop options") \
2339 _(FORMAT, "incorrectly formatted hop-by-hop options") \
2340 _(UNKNOWN_OPTION, "unknown ip6 hop-by-hop options")
2344 #define _(sym,str) IP6_HOP_BY_HOP_ERROR_##sym,
2345 foreach_ip6_hop_by_hop_error
2347 IP6_HOP_BY_HOP_N_ERROR,
2348 } ip6_hop_by_hop_error_t;
2351 * Primary h-b-h handler trace support
2352 * We work pretty hard on the problem for obvious reasons
2358 u8 option_data[256];
2359 } ip6_hop_by_hop_trace_t;
2361 vlib_node_registration_t ip6_hop_by_hop_node;
2363 static char *ip6_hop_by_hop_error_strings[] = {
2364 #define _(sym,string) string,
2365 foreach_ip6_hop_by_hop_error
2370 format_ip6_hop_by_hop_trace (u8 * s, va_list * args)
2372 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
2373 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
2374 ip6_hop_by_hop_trace_t *t = va_arg (*args, ip6_hop_by_hop_trace_t *);
2375 ip6_hop_by_hop_header_t *hbh0;
2376 ip6_hop_by_hop_option_t *opt0, *limit0;
2377 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2381 hbh0 = (ip6_hop_by_hop_header_t *) t->option_data;
2383 s = format (s, "IP6_HOP_BY_HOP: next index %d len %d traced %d",
2384 t->next_index, (hbh0->length + 1) << 3, t->trace_len);
2386 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2387 limit0 = (ip6_hop_by_hop_option_t *) ((u8 *) hbh0) + t->trace_len;
2389 while (opt0 < limit0)
2394 case 0: /* Pad, just stop */
2395 opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0) + 1;
2399 if (hm->trace[type0])
2401 s = (*hm->trace[type0]) (s, opt0);
2406 format (s, "\n unrecognized option %d length %d", type0,
2410 (ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length +
2411 sizeof (ip6_hop_by_hop_option_t));
2419 ip6_scan_hbh_options (vlib_buffer_t * b0,
2421 ip6_hop_by_hop_header_t * hbh0,
2422 ip6_hop_by_hop_option_t * opt0,
2423 ip6_hop_by_hop_option_t * limit0, u32 * next0)
2425 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2429 while (opt0 < limit0)
2435 opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0) + 1;
2440 if (hm->options[type0])
2442 if ((*hm->options[type0]) (b0, ip0, opt0) < 0)
2444 error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2450 /* Unrecognized mandatory option, check the two high order bits */
2451 switch (opt0->type & HBH_OPTION_TYPE_HIGH_ORDER_BITS)
2453 case HBH_OPTION_TYPE_SKIP_UNKNOWN:
2455 case HBH_OPTION_TYPE_DISCARD_UNKNOWN:
2456 error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2457 *next0 = IP_LOOKUP_NEXT_DROP;
2459 case HBH_OPTION_TYPE_DISCARD_UNKNOWN_ICMP:
2460 error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2461 *next0 = IP_LOOKUP_NEXT_ICMP_ERROR;
2462 icmp6_error_set_vnet_buffer (b0, ICMP6_parameter_problem,
2463 ICMP6_parameter_problem_unrecognized_option,
2464 (u8 *) opt0 - (u8 *) ip0);
2466 case HBH_OPTION_TYPE_DISCARD_UNKNOWN_ICMP_NOT_MCAST:
2467 error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2468 if (!ip6_address_is_multicast (&ip0->dst_address))
2470 *next0 = IP_LOOKUP_NEXT_ICMP_ERROR;
2471 icmp6_error_set_vnet_buffer (b0,
2472 ICMP6_parameter_problem,
2473 ICMP6_parameter_problem_unrecognized_option,
2474 (u8 *) opt0 - (u8 *) ip0);
2478 *next0 = IP_LOOKUP_NEXT_DROP;
2486 (ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length +
2487 sizeof (ip6_hop_by_hop_option_t));
2493 * Process the Hop-by-Hop Options header
2496 ip6_hop_by_hop (vlib_main_t * vm,
2497 vlib_node_runtime_t * node, vlib_frame_t * frame)
2499 vlib_node_runtime_t *error_node =
2500 vlib_node_get_runtime (vm, ip6_hop_by_hop_node.index);
2501 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2502 u32 n_left_from, *from, *to_next;
2503 ip_lookup_next_t next_index;
2504 ip6_main_t *im = &ip6_main;
2505 ip_lookup_main_t *lm = &im->lookup_main;
2507 from = vlib_frame_vector_args (frame);
2508 n_left_from = frame->n_vectors;
2509 next_index = node->cached_next_index;
2511 while (n_left_from > 0)
2515 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
2517 while (n_left_from >= 4 && n_left_to_next >= 2)
2520 vlib_buffer_t *b0, *b1;
2522 ip6_header_t *ip0, *ip1;
2523 ip6_hop_by_hop_header_t *hbh0, *hbh1;
2524 ip6_hop_by_hop_option_t *opt0, *limit0, *opt1, *limit1;
2525 u8 error0 = 0, error1 = 0;
2527 /* Prefetch next iteration. */
2529 vlib_buffer_t *p2, *p3;
2531 p2 = vlib_get_buffer (vm, from[2]);
2532 p3 = vlib_get_buffer (vm, from[3]);
2534 vlib_prefetch_buffer_header (p2, LOAD);
2535 vlib_prefetch_buffer_header (p3, LOAD);
2537 CLIB_PREFETCH (p2->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
2538 CLIB_PREFETCH (p3->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
2541 /* Speculatively enqueue b0, b1 to the current next frame */
2542 to_next[0] = bi0 = from[0];
2543 to_next[1] = bi1 = from[1];
2547 n_left_to_next -= 2;
2549 b0 = vlib_get_buffer (vm, bi0);
2550 b1 = vlib_get_buffer (vm, bi1);
2552 /* Default use the next_index from the adjacency. A HBH option rarely redirects to a different node */
2553 u32 adj_index0 = vnet_buffer (b0)->ip.adj_index[VLIB_TX];
2554 ip_adjacency_t *adj0 = ip_get_adjacency (lm, adj_index0);
2555 u32 adj_index1 = vnet_buffer (b1)->ip.adj_index[VLIB_TX];
2556 ip_adjacency_t *adj1 = ip_get_adjacency (lm, adj_index1);
2558 /* Default use the next_index from the adjacency. A HBH option rarely redirects to a different node */
2559 next0 = adj0->lookup_next_index;
2560 next1 = adj1->lookup_next_index;
2562 ip0 = vlib_buffer_get_current (b0);
2563 ip1 = vlib_buffer_get_current (b1);
2564 hbh0 = (ip6_hop_by_hop_header_t *) (ip0 + 1);
2565 hbh1 = (ip6_hop_by_hop_header_t *) (ip1 + 1);
2566 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2567 opt1 = (ip6_hop_by_hop_option_t *) (hbh1 + 1);
2569 (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 +
2570 ((hbh0->length + 1) << 3));
2572 (ip6_hop_by_hop_option_t *) ((u8 *) hbh1 +
2573 ((hbh1->length + 1) << 3));
2576 * Basic validity checks
2578 if ((hbh0->length + 1) << 3 >
2579 clib_net_to_host_u16 (ip0->payload_length))
2581 error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2582 next0 = IP_LOOKUP_NEXT_DROP;
2585 /* Scan the set of h-b-h options, process ones that we understand */
2586 error0 = ip6_scan_hbh_options (b0, ip0, hbh0, opt0, limit0, &next0);
2588 if ((hbh1->length + 1) << 3 >
2589 clib_net_to_host_u16 (ip1->payload_length))
2591 error1 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2592 next1 = IP_LOOKUP_NEXT_DROP;
2595 /* Scan the set of h-b-h options, process ones that we understand */
2596 error1 = ip6_scan_hbh_options (b1, ip1, hbh1, opt1, limit1, &next1);
2599 /* Has the classifier flagged this buffer for special treatment? */
2602 && (vnet_buffer (b0)->l2_classify.opaque_index & OI_DECAP)))
2603 next0 = hm->next_override;
2605 /* Has the classifier flagged this buffer for special treatment? */
2608 && (vnet_buffer (b1)->l2_classify.opaque_index & OI_DECAP)))
2609 next1 = hm->next_override;
2611 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)))
2613 if (b0->flags & VLIB_BUFFER_IS_TRACED)
2615 ip6_hop_by_hop_trace_t *t =
2616 vlib_add_trace (vm, node, b0, sizeof (*t));
2617 u32 trace_len = (hbh0->length + 1) << 3;
2618 t->next_index = next0;
2619 /* Capture the h-b-h option verbatim */
2622 ARRAY_LEN (t->option_data) ? trace_len :
2623 ARRAY_LEN (t->option_data);
2624 t->trace_len = trace_len;
2625 clib_memcpy (t->option_data, hbh0, trace_len);
2627 if (b1->flags & VLIB_BUFFER_IS_TRACED)
2629 ip6_hop_by_hop_trace_t *t =
2630 vlib_add_trace (vm, node, b1, sizeof (*t));
2631 u32 trace_len = (hbh1->length + 1) << 3;
2632 t->next_index = next1;
2633 /* Capture the h-b-h option verbatim */
2636 ARRAY_LEN (t->option_data) ? trace_len :
2637 ARRAY_LEN (t->option_data);
2638 t->trace_len = trace_len;
2639 clib_memcpy (t->option_data, hbh1, trace_len);
2644 b0->error = error_node->errors[error0];
2645 b1->error = error_node->errors[error1];
2647 /* verify speculative enqueue, maybe switch current next frame */
2648 vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
2649 n_left_to_next, bi0, bi1, next0,
2653 while (n_left_from > 0 && n_left_to_next > 0)
2659 ip6_hop_by_hop_header_t *hbh0;
2660 ip6_hop_by_hop_option_t *opt0, *limit0;
2663 /* Speculatively enqueue b0 to the current next frame */
2669 n_left_to_next -= 1;
2671 b0 = vlib_get_buffer (vm, bi0);
2673 * Default use the next_index from the adjacency.
2674 * A HBH option rarely redirects to a different node
2676 u32 adj_index0 = vnet_buffer (b0)->ip.adj_index[VLIB_TX];
2677 ip_adjacency_t *adj0 = ip_get_adjacency (lm, adj_index0);
2678 next0 = adj0->lookup_next_index;
2680 ip0 = vlib_buffer_get_current (b0);
2681 hbh0 = (ip6_hop_by_hop_header_t *) (ip0 + 1);
2682 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2684 (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 +
2685 ((hbh0->length + 1) << 3));
2688 * Basic validity checks
2690 if ((hbh0->length + 1) << 3 >
2691 clib_net_to_host_u16 (ip0->payload_length))
2693 error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2694 next0 = IP_LOOKUP_NEXT_DROP;
2698 /* Scan the set of h-b-h options, process ones that we understand */
2699 error0 = ip6_scan_hbh_options (b0, ip0, hbh0, opt0, limit0, &next0);
2702 /* Has the classifier flagged this buffer for special treatment? */
2705 && (vnet_buffer (b0)->l2_classify.opaque_index & OI_DECAP)))
2706 next0 = hm->next_override;
2708 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
2710 ip6_hop_by_hop_trace_t *t =
2711 vlib_add_trace (vm, node, b0, sizeof (*t));
2712 u32 trace_len = (hbh0->length + 1) << 3;
2713 t->next_index = next0;
2714 /* Capture the h-b-h option verbatim */
2717 ARRAY_LEN (t->option_data) ? trace_len :
2718 ARRAY_LEN (t->option_data);
2719 t->trace_len = trace_len;
2720 clib_memcpy (t->option_data, hbh0, trace_len);
2723 b0->error = error_node->errors[error0];
2725 /* verify speculative enqueue, maybe switch current next frame */
2726 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
2727 n_left_to_next, bi0, next0);
2729 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2731 return frame->n_vectors;
2735 VLIB_REGISTER_NODE (ip6_hop_by_hop_node) =
2737 .function = ip6_hop_by_hop,
2738 .name = "ip6-hop-by-hop",
2739 .sibling_of = "ip6-lookup",
2740 .vector_size = sizeof (u32),
2741 .format_trace = format_ip6_hop_by_hop_trace,
2742 .type = VLIB_NODE_TYPE_INTERNAL,
2743 .n_errors = ARRAY_LEN (ip6_hop_by_hop_error_strings),
2744 .error_strings = ip6_hop_by_hop_error_strings,
2749 VLIB_NODE_FUNCTION_MULTIARCH (ip6_hop_by_hop_node, ip6_hop_by_hop);
2751 static clib_error_t *
2752 ip6_hop_by_hop_init (vlib_main_t * vm)
2754 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2755 memset (hm->options, 0, sizeof (hm->options));
2756 memset (hm->trace, 0, sizeof (hm->trace));
2757 hm->next_override = IP6_LOOKUP_NEXT_POP_HOP_BY_HOP;
2761 VLIB_INIT_FUNCTION (ip6_hop_by_hop_init);
2764 ip6_hbh_set_next_override (uword next)
2766 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2768 hm->next_override = next;
2772 ip6_hbh_register_option (u8 option,
2773 int options (vlib_buffer_t * b, ip6_header_t * ip,
2774 ip6_hop_by_hop_option_t * opt),
2775 u8 * trace (u8 * s, ip6_hop_by_hop_option_t * opt))
2777 ip6_main_t *im = &ip6_main;
2778 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2780 ASSERT (option < ARRAY_LEN (hm->options));
2782 /* Already registered */
2783 if (hm->options[option])
2786 hm->options[option] = options;
2787 hm->trace[option] = trace;
2789 /* Set global variable */
2790 im->hbh_enabled = 1;
2796 ip6_hbh_unregister_option (u8 option)
2798 ip6_main_t *im = &ip6_main;
2799 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2801 ASSERT (option < ARRAY_LEN (hm->options));
2803 /* Not registered */
2804 if (!hm->options[option])
2807 hm->options[option] = NULL;
2808 hm->trace[option] = NULL;
2810 /* Disable global knob if this was the last option configured */
2813 for (i = 0; i < 256; i++)
2815 if (hm->options[option])
2822 im->hbh_enabled = 0;
2827 /* Global IP6 main. */
2828 ip6_main_t ip6_main;
2830 static clib_error_t *
2831 ip6_lookup_init (vlib_main_t * vm)
2833 ip6_main_t *im = &ip6_main;
2834 clib_error_t *error;
2837 if ((error = vlib_call_init_function (vm, vnet_feature_init)))
2840 for (i = 0; i < ARRAY_LEN (im->fib_masks); i++)
2847 for (j = 0; j < i0; j++)
2848 im->fib_masks[i].as_u32[j] = ~0;
2851 im->fib_masks[i].as_u32[i0] =
2852 clib_host_to_net_u32 (pow2_mask (i1) << (32 - i1));
2855 ip_lookup_init (&im->lookup_main, /* is_ip6 */ 1);
2857 if (im->lookup_table_nbuckets == 0)
2858 im->lookup_table_nbuckets = IP6_FIB_DEFAULT_HASH_NUM_BUCKETS;
2860 im->lookup_table_nbuckets = 1 << max_log2 (im->lookup_table_nbuckets);
2862 if (im->lookup_table_size == 0)
2863 im->lookup_table_size = IP6_FIB_DEFAULT_HASH_MEMORY_SIZE;
2865 BV (clib_bihash_init) (&(im->ip6_table[IP6_FIB_TABLE_FWDING].ip6_hash),
2866 "ip6 FIB fwding table",
2867 im->lookup_table_nbuckets, im->lookup_table_size);
2868 BV (clib_bihash_init) (&im->ip6_table[IP6_FIB_TABLE_NON_FWDING].ip6_hash,
2869 "ip6 FIB non-fwding table",
2870 im->lookup_table_nbuckets, im->lookup_table_size);
2872 /* Create FIB with index 0 and table id of 0. */
2873 fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6, 0);
2877 pn = pg_get_node (ip6_lookup_node.index);
2878 pn->unformat_edit = unformat_pg_ip6_header;
2881 /* Unless explicitly configured, don't process HBH options */
2882 im->hbh_enabled = 0;
2885 icmp6_neighbor_solicitation_header_t p;
2887 memset (&p, 0, sizeof (p));
2889 p.ip.ip_version_traffic_class_and_flow_label =
2890 clib_host_to_net_u32 (0x6 << 28);
2891 p.ip.payload_length =
2892 clib_host_to_net_u16 (sizeof (p) -
2894 (icmp6_neighbor_solicitation_header_t, neighbor));
2895 p.ip.protocol = IP_PROTOCOL_ICMP6;
2896 p.ip.hop_limit = 255;
2897 ip6_set_solicited_node_multicast_address (&p.ip.dst_address, 0);
2899 p.neighbor.icmp.type = ICMP6_neighbor_solicitation;
2901 p.link_layer_option.header.type =
2902 ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address;
2903 p.link_layer_option.header.n_data_u64s =
2904 sizeof (p.link_layer_option) / sizeof (u64);
2906 vlib_packet_template_init (vm,
2907 &im->discover_neighbor_packet_template,
2909 /* alloc chunk size */ 8,
2910 "ip6 neighbor discovery");
2916 VLIB_INIT_FUNCTION (ip6_lookup_init);
2918 static clib_error_t *
2919 add_del_ip6_interface_table (vlib_main_t * vm,
2920 unformat_input_t * input,
2921 vlib_cli_command_t * cmd)
2923 vnet_main_t *vnm = vnet_get_main ();
2924 clib_error_t *error = 0;
2925 u32 sw_if_index, table_id;
2929 if (!unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
2931 error = clib_error_return (0, "unknown interface `%U'",
2932 format_unformat_error, input);
2936 if (unformat (input, "%d", &table_id))
2940 error = clib_error_return (0, "expected table id `%U'",
2941 format_unformat_error, input);
2946 u32 fib_index = fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6,
2949 vec_validate (ip6_main.fib_index_by_sw_if_index, sw_if_index);
2950 ip6_main.fib_index_by_sw_if_index[sw_if_index] = fib_index;
2959 * Place the indicated interface into the supplied IPv6 FIB table (also known
2960 * as a VRF). If the FIB table does not exist, this command creates it. To
2961 * display the current IPv6 FIB table, use the command '<em>show ip6 fib</em>'.
2962 * FIB table will only be displayed if a route has been added to the table, or
2963 * an IP Address is assigned to an interface in the table (which adds a route
2966 * @note IP addresses added after setting the interface IP table end up in
2967 * the indicated FIB table. If the IP address is added prior to adding the
2968 * interface to the FIB table, it will NOT be part of the FIB table. Predictable
2969 * but potentially counter-intuitive results occur if you provision interface
2970 * addresses in multiple FIBs. Upon RX, packets will be processed in the last
2971 * IP table ID provisioned. It might be marginally useful to evade source RPF
2972 * drops to put an interface address into multiple FIBs.
2975 * Example of how to add an interface to an IPv6 FIB table (where 2 is the table-id):
2976 * @cliexcmd{set interface ip6 table GigabitEthernet2/0/0 2}
2979 VLIB_CLI_COMMAND (set_interface_ip6_table_command, static) =
2981 .path = "set interface ip6 table",
2982 .function = add_del_ip6_interface_table,
2983 .short_help = "set interface ip6 table <interface> <table-id>"
2988 ip6_link_local_address_from_ethernet_mac_address (ip6_address_t * ip,
2991 ip->as_u64[0] = clib_host_to_net_u64 (0xFE80000000000000ULL);
2992 /* Invert the "u" bit */
2993 ip->as_u8[8] = mac[0] ^ (1 << 1);
2994 ip->as_u8[9] = mac[1];
2995 ip->as_u8[10] = mac[2];
2996 ip->as_u8[11] = 0xFF;
2997 ip->as_u8[12] = 0xFE;
2998 ip->as_u8[13] = mac[3];
2999 ip->as_u8[14] = mac[4];
3000 ip->as_u8[15] = mac[5];
3004 ip6_ethernet_mac_address_from_link_local_address (u8 * mac,
3007 /* Invert the previously inverted "u" bit */
3008 mac[0] = ip->as_u8[8] ^ (1 << 1);
3009 mac[1] = ip->as_u8[9];
3010 mac[2] = ip->as_u8[10];
3011 mac[3] = ip->as_u8[13];
3012 mac[4] = ip->as_u8[14];
3013 mac[5] = ip->as_u8[15];
3016 static clib_error_t *
3017 test_ip6_link_command_fn (vlib_main_t * vm,
3018 unformat_input_t * input, vlib_cli_command_t * cmd)
3021 ip6_address_t _a, *a = &_a;
3023 if (unformat (input, "%U", unformat_ethernet_address, mac))
3025 ip6_link_local_address_from_ethernet_mac_address (a, mac);
3026 vlib_cli_output (vm, "Link local address: %U", format_ip6_address, a);
3027 ip6_ethernet_mac_address_from_link_local_address (mac, a);
3028 vlib_cli_output (vm, "Original MAC address: %U",
3029 format_ethernet_address, mac);
3036 * This command converts the given MAC Address into an IPv6 link-local
3040 * Example of how to create an IPv6 link-local address:
3041 * @cliexstart{test ip6 link 16:d9:e0:91:79:86}
3042 * Link local address: fe80::14d9:e0ff:fe91:7986
3043 * Original MAC address: 16:d9:e0:91:79:86
3047 VLIB_CLI_COMMAND (test_link_command, static) =
3049 .path = "test ip6 link",
3050 .function = test_ip6_link_command_fn,
3051 .short_help = "test ip6 link <mac-address>",
3056 vnet_set_ip6_flow_hash (u32 table_id, u32 flow_hash_config)
3058 ip6_main_t *im6 = &ip6_main;
3060 uword *p = hash_get (im6->fib_index_by_table_id, table_id);
3065 fib = ip6_fib_get (p[0]);
3067 fib->flow_hash_config = flow_hash_config;
3071 static clib_error_t *
3072 set_ip6_flow_hash_command_fn (vlib_main_t * vm,
3073 unformat_input_t * input,
3074 vlib_cli_command_t * cmd)
3078 u32 flow_hash_config = 0;
3081 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
3083 if (unformat (input, "table %d", &table_id))
3086 else if (unformat (input, #a)) { flow_hash_config |= v; matched=1;}
3087 foreach_flow_hash_bit
3094 return clib_error_return (0, "unknown input `%U'",
3095 format_unformat_error, input);
3097 rv = vnet_set_ip6_flow_hash (table_id, flow_hash_config);
3104 return clib_error_return (0, "no such FIB table %d", table_id);
3107 clib_warning ("BUG: illegal flow hash config 0x%x", flow_hash_config);
3115 * Configure the set of IPv6 fields used by the flow hash.
3119 * Example of how to set the flow hash on a given table:
3120 * @cliexcmd{set ip6 flow-hash table 8 dst sport dport proto}
3122 * Example of display the configured flow hash:
3123 * @cliexstart{show ip6 fib}
3124 * ipv6-VRF:0, fib_index 0, flow hash: src dst sport dport proto
3127 * [@0]: dpo-load-balance: [index:5 buckets:1 uRPF:5 to:[0:0]]
3128 * [0] [@0]: dpo-drop ip6
3131 * [@0]: dpo-load-balance: [index:10 buckets:1 uRPF:10 to:[0:0]]
3132 * [0] [@2]: dpo-receive
3135 * [@0]: dpo-load-balance: [index:8 buckets:1 uRPF:8 to:[0:0]]
3136 * [0] [@2]: dpo-receive
3139 * [@0]: dpo-load-balance: [index:7 buckets:1 uRPF:7 to:[0:0]]
3140 * [0] [@2]: dpo-receive
3143 * [@0]: dpo-load-balance: [index:9 buckets:1 uRPF:9 to:[0:0]]
3144 * [0] [@2]: dpo-receive
3145 * ff02::1:ff00:0/104
3147 * [@0]: dpo-load-balance: [index:6 buckets:1 uRPF:6 to:[0:0]]
3148 * [0] [@2]: dpo-receive
3149 * ipv6-VRF:8, fib_index 1, flow hash: dst sport dport proto
3152 * [@0]: dpo-load-balance: [index:21 buckets:1 uRPF:20 to:[0:0]]
3153 * [0] [@0]: dpo-drop ip6
3156 * [@0]: dpo-load-balance: [index:27 buckets:1 uRPF:26 to:[0:0]]
3157 * [0] [@4]: ipv6-glean: af_packet0
3160 * [@0]: dpo-load-balance: [index:28 buckets:1 uRPF:27 to:[0:0]]
3161 * [0] [@2]: dpo-receive: @::a:1:1:0:7 on af_packet0
3164 * [@0]: dpo-load-balance: [index:26 buckets:1 uRPF:25 to:[0:0]]
3165 * [0] [@2]: dpo-receive
3166 * fe80::fe:3eff:fe3e:9222/128
3168 * [@0]: dpo-load-balance: [index:29 buckets:1 uRPF:28 to:[0:0]]
3169 * [0] [@2]: dpo-receive: fe80::fe:3eff:fe3e:9222 on af_packet0
3172 * [@0]: dpo-load-balance: [index:24 buckets:1 uRPF:23 to:[0:0]]
3173 * [0] [@2]: dpo-receive
3176 * [@0]: dpo-load-balance: [index:23 buckets:1 uRPF:22 to:[0:0]]
3177 * [0] [@2]: dpo-receive
3180 * [@0]: dpo-load-balance: [index:25 buckets:1 uRPF:24 to:[0:0]]
3181 * [0] [@2]: dpo-receive
3182 * ff02::1:ff00:0/104
3184 * [@0]: dpo-load-balance: [index:22 buckets:1 uRPF:21 to:[0:0]]
3185 * [0] [@2]: dpo-receive
3190 VLIB_CLI_COMMAND (set_ip6_flow_hash_command, static) =
3192 .path = "set ip6 flow-hash",
3194 "set ip6 flow-hash table <table-id> [src] [dst] [sport] [dport] [proto] [reverse]",
3195 .function = set_ip6_flow_hash_command_fn,
3199 static clib_error_t *
3200 show_ip6_local_command_fn (vlib_main_t * vm,
3201 unformat_input_t * input, vlib_cli_command_t * cmd)
3203 ip6_main_t *im = &ip6_main;
3204 ip_lookup_main_t *lm = &im->lookup_main;
3207 vlib_cli_output (vm, "Protocols handled by ip6_local");
3208 for (i = 0; i < ARRAY_LEN (lm->local_next_by_ip_protocol); i++)
3210 if (lm->local_next_by_ip_protocol[i] != IP_LOCAL_NEXT_PUNT)
3211 vlib_cli_output (vm, "%d", i);
3219 * Display the set of protocols handled by the local IPv6 stack.
3222 * Example of how to display local protocol table:
3223 * @cliexstart{show ip6 local}
3224 * Protocols handled by ip6_local
3232 VLIB_CLI_COMMAND (show_ip6_local, static) =
3234 .path = "show ip6 local",
3235 .function = show_ip6_local_command_fn,
3236 .short_help = "show ip6 local",
3241 vnet_set_ip6_classify_intfc (vlib_main_t * vm, u32 sw_if_index,
3244 vnet_main_t *vnm = vnet_get_main ();
3245 vnet_interface_main_t *im = &vnm->interface_main;
3246 ip6_main_t *ipm = &ip6_main;
3247 ip_lookup_main_t *lm = &ipm->lookup_main;
3248 vnet_classify_main_t *cm = &vnet_classify_main;
3249 ip6_address_t *if_addr;
3251 if (pool_is_free_index (im->sw_interfaces, sw_if_index))
3252 return VNET_API_ERROR_NO_MATCHING_INTERFACE;
3254 if (table_index != ~0 && pool_is_free_index (cm->tables, table_index))
3255 return VNET_API_ERROR_NO_SUCH_ENTRY;
3257 vec_validate (lm->classify_table_index_by_sw_if_index, sw_if_index);
3258 lm->classify_table_index_by_sw_if_index[sw_if_index] = table_index;
3260 if_addr = ip6_interface_first_address (ipm, sw_if_index, NULL);
3262 if (NULL != if_addr)
3264 fib_prefix_t pfx = {
3266 .fp_proto = FIB_PROTOCOL_IP6,
3267 .fp_addr.ip6 = *if_addr,
3271 fib_index = fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4,
3275 if (table_index != (u32) ~ 0)
3277 dpo_id_t dpo = DPO_INVALID;
3282 classify_dpo_create (DPO_PROTO_IP6, table_index));
3284 fib_table_entry_special_dpo_add (fib_index,
3286 FIB_SOURCE_CLASSIFY,
3287 FIB_ENTRY_FLAG_NONE, &dpo);
3292 fib_table_entry_special_remove (fib_index,
3293 &pfx, FIB_SOURCE_CLASSIFY);
3300 static clib_error_t *
3301 set_ip6_classify_command_fn (vlib_main_t * vm,
3302 unformat_input_t * input,
3303 vlib_cli_command_t * cmd)
3305 u32 table_index = ~0;
3306 int table_index_set = 0;
3307 u32 sw_if_index = ~0;
3310 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
3312 if (unformat (input, "table-index %d", &table_index))
3313 table_index_set = 1;
3314 else if (unformat (input, "intfc %U", unformat_vnet_sw_interface,
3315 vnet_get_main (), &sw_if_index))
3321 if (table_index_set == 0)
3322 return clib_error_return (0, "classify table-index must be specified");
3324 if (sw_if_index == ~0)
3325 return clib_error_return (0, "interface / subif must be specified");
3327 rv = vnet_set_ip6_classify_intfc (vm, sw_if_index, table_index);
3334 case VNET_API_ERROR_NO_MATCHING_INTERFACE:
3335 return clib_error_return (0, "No such interface");
3337 case VNET_API_ERROR_NO_SUCH_ENTRY:
3338 return clib_error_return (0, "No such classifier table");
3344 * Assign a classification table to an interface. The classification
3345 * table is created using the '<em>classify table</em>' and '<em>classify session</em>'
3346 * commands. Once the table is create, use this command to filter packets
3350 * Example of how to assign a classification table to an interface:
3351 * @cliexcmd{set ip6 classify intfc GigabitEthernet2/0/0 table-index 1}
3354 VLIB_CLI_COMMAND (set_ip6_classify_command, static) =
3356 .path = "set ip6 classify",
3358 "set ip6 classify intfc <interface> table-index <classify-idx>",
3359 .function = set_ip6_classify_command_fn,
3363 static clib_error_t *
3364 ip6_config (vlib_main_t * vm, unformat_input_t * input)
3366 ip6_main_t *im = &ip6_main;
3371 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
3373 if (unformat (input, "hash-buckets %d", &tmp))
3375 else if (unformat (input, "heap-size %dm", &tmp))
3376 heapsize = ((u64) tmp) << 20;
3377 else if (unformat (input, "heap-size %dM", &tmp))
3378 heapsize = ((u64) tmp) << 20;
3379 else if (unformat (input, "heap-size %dg", &tmp))
3380 heapsize = ((u64) tmp) << 30;
3381 else if (unformat (input, "heap-size %dG", &tmp))
3382 heapsize = ((u64) tmp) << 30;
3384 return clib_error_return (0, "unknown input '%U'",
3385 format_unformat_error, input);
3388 im->lookup_table_nbuckets = nbuckets;
3389 im->lookup_table_size = heapsize;
3394 VLIB_EARLY_CONFIG_FUNCTION (ip6_config, "ip6");
3397 * fd.io coding-style-patch-verification: ON
3400 * eval: (c-set-style "gnu")