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_urpf_list.h> /* for FIB uRPF check */
46 #include <vnet/fib/ip6_fib.h>
47 #include <vnet/mfib/ip6_mfib.h>
48 #include <vnet/dpo/load_balance_map.h>
49 #include <vnet/dpo/classify_dpo.h>
51 #include <vppinfra/bihash_template.c>
53 /* Flag used by IOAM code. Classifier sets it pop-hop-by-hop checks it */
54 #define OI_DECAP 0x80000000
58 * @brief IPv6 Forwarding.
60 * This file contains the source code for IPv6 forwarding.
64 ip6_forward_next_trace (vlib_main_t * vm,
65 vlib_node_runtime_t * node,
67 vlib_rx_or_tx_t which_adj_index);
70 ip6_lookup_inline (vlib_main_t * vm,
71 vlib_node_runtime_t * node, vlib_frame_t * frame)
73 ip6_main_t *im = &ip6_main;
74 vlib_combined_counter_main_t *cm = &load_balance_main.lbm_to_counters;
75 u32 n_left_from, n_left_to_next, *from, *to_next;
76 ip_lookup_next_t next;
77 u32 thread_index = vlib_get_thread_index ();
79 from = vlib_frame_vector_args (frame);
80 n_left_from = frame->n_vectors;
81 next = node->cached_next_index;
83 while (n_left_from > 0)
85 vlib_get_next_frame (vm, node, next, to_next, n_left_to_next);
87 while (n_left_from >= 4 && n_left_to_next >= 2)
89 vlib_buffer_t *p0, *p1;
90 u32 pi0, pi1, lbi0, lbi1, wrong_next;
91 ip_lookup_next_t next0, next1;
92 ip6_header_t *ip0, *ip1;
93 ip6_address_t *dst_addr0, *dst_addr1;
94 u32 fib_index0, fib_index1;
95 u32 flow_hash_config0, flow_hash_config1;
96 const dpo_id_t *dpo0, *dpo1;
97 const load_balance_t *lb0, *lb1;
99 /* Prefetch next iteration. */
101 vlib_buffer_t *p2, *p3;
103 p2 = vlib_get_buffer (vm, from[2]);
104 p3 = vlib_get_buffer (vm, from[3]);
106 vlib_prefetch_buffer_header (p2, LOAD);
107 vlib_prefetch_buffer_header (p3, LOAD);
108 CLIB_PREFETCH (p2->data, sizeof (ip0[0]), LOAD);
109 CLIB_PREFETCH (p3->data, sizeof (ip0[0]), LOAD);
112 pi0 = to_next[0] = from[0];
113 pi1 = to_next[1] = from[1];
115 p0 = vlib_get_buffer (vm, pi0);
116 p1 = vlib_get_buffer (vm, pi1);
118 ip0 = vlib_buffer_get_current (p0);
119 ip1 = vlib_buffer_get_current (p1);
121 dst_addr0 = &ip0->dst_address;
122 dst_addr1 = &ip1->dst_address;
125 vec_elt (im->fib_index_by_sw_if_index,
126 vnet_buffer (p0)->sw_if_index[VLIB_RX]);
128 vec_elt (im->fib_index_by_sw_if_index,
129 vnet_buffer (p1)->sw_if_index[VLIB_RX]);
131 fib_index0 = (vnet_buffer (p0)->sw_if_index[VLIB_TX] == (u32) ~ 0) ?
132 fib_index0 : vnet_buffer (p0)->sw_if_index[VLIB_TX];
133 fib_index1 = (vnet_buffer (p1)->sw_if_index[VLIB_TX] == (u32) ~ 0) ?
134 fib_index1 : vnet_buffer (p1)->sw_if_index[VLIB_TX];
136 lbi0 = ip6_fib_table_fwding_lookup (im, fib_index0, dst_addr0);
137 lbi1 = ip6_fib_table_fwding_lookup (im, fib_index1, dst_addr1);
139 lb0 = load_balance_get (lbi0);
140 lb1 = load_balance_get (lbi1);
141 ASSERT (lb0->lb_n_buckets > 0);
142 ASSERT (lb1->lb_n_buckets > 0);
143 ASSERT (is_pow2 (lb0->lb_n_buckets));
144 ASSERT (is_pow2 (lb1->lb_n_buckets));
146 vnet_buffer (p0)->ip.flow_hash = vnet_buffer (p1)->ip.flow_hash = 0;
148 if (PREDICT_FALSE (lb0->lb_n_buckets > 1))
150 flow_hash_config0 = lb0->lb_hash_config;
151 vnet_buffer (p0)->ip.flow_hash =
152 ip6_compute_flow_hash (ip0, flow_hash_config0);
154 load_balance_get_fwd_bucket (lb0,
155 (vnet_buffer (p0)->ip.flow_hash &
156 (lb0->lb_n_buckets_minus_1)));
160 dpo0 = load_balance_get_bucket_i (lb0, 0);
162 if (PREDICT_FALSE (lb1->lb_n_buckets > 1))
164 flow_hash_config1 = lb1->lb_hash_config;
165 vnet_buffer (p1)->ip.flow_hash =
166 ip6_compute_flow_hash (ip1, flow_hash_config1);
168 load_balance_get_fwd_bucket (lb1,
169 (vnet_buffer (p1)->ip.flow_hash &
170 (lb1->lb_n_buckets_minus_1)));
174 dpo1 = load_balance_get_bucket_i (lb1, 0);
176 next0 = dpo0->dpoi_next_node;
177 next1 = dpo1->dpoi_next_node;
179 /* Only process the HBH Option Header if explicitly configured to do so */
181 (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
183 next0 = (dpo_is_adj (dpo0) && im->hbh_enabled) ?
184 (ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next0;
187 (ip1->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
189 next1 = (dpo_is_adj (dpo1) && im->hbh_enabled) ?
190 (ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next1;
192 vnet_buffer (p0)->ip.adj_index[VLIB_TX] = dpo0->dpoi_index;
193 vnet_buffer (p1)->ip.adj_index[VLIB_TX] = dpo1->dpoi_index;
195 vlib_increment_combined_counter
196 (cm, thread_index, lbi0, 1, vlib_buffer_length_in_chain (vm, p0));
197 vlib_increment_combined_counter
198 (cm, thread_index, lbi1, 1, vlib_buffer_length_in_chain (vm, p1));
205 wrong_next = (next0 != next) + 2 * (next1 != next);
206 if (PREDICT_FALSE (wrong_next != 0))
215 vlib_set_next_frame_buffer (vm, node, next0, pi0);
222 vlib_set_next_frame_buffer (vm, node, next1, pi1);
229 vlib_set_next_frame_buffer (vm, node, next0, pi0);
230 vlib_set_next_frame_buffer (vm, node, next1, pi1);
234 vlib_put_next_frame (vm, node, next, n_left_to_next);
236 vlib_get_next_frame (vm, node, next, to_next,
243 while (n_left_from > 0 && n_left_to_next > 0)
248 ip_lookup_next_t next0;
250 ip6_address_t *dst_addr0;
251 u32 fib_index0, flow_hash_config0;
252 const dpo_id_t *dpo0;
257 p0 = vlib_get_buffer (vm, pi0);
259 ip0 = vlib_buffer_get_current (p0);
261 dst_addr0 = &ip0->dst_address;
264 vec_elt (im->fib_index_by_sw_if_index,
265 vnet_buffer (p0)->sw_if_index[VLIB_RX]);
267 (vnet_buffer (p0)->sw_if_index[VLIB_TX] ==
268 (u32) ~ 0) ? fib_index0 : vnet_buffer (p0)->sw_if_index[VLIB_TX];
270 lbi0 = ip6_fib_table_fwding_lookup (im, fib_index0, dst_addr0);
272 lb0 = load_balance_get (lbi0);
273 flow_hash_config0 = lb0->lb_hash_config;
275 vnet_buffer (p0)->ip.flow_hash = 0;
276 ASSERT (lb0->lb_n_buckets > 0);
277 ASSERT (is_pow2 (lb0->lb_n_buckets));
279 if (PREDICT_FALSE (lb0->lb_n_buckets > 1))
281 flow_hash_config0 = lb0->lb_hash_config;
282 vnet_buffer (p0)->ip.flow_hash =
283 ip6_compute_flow_hash (ip0, flow_hash_config0);
285 load_balance_get_fwd_bucket (lb0,
286 (vnet_buffer (p0)->ip.flow_hash &
287 (lb0->lb_n_buckets_minus_1)));
291 dpo0 = load_balance_get_bucket_i (lb0, 0);
294 dpo0 = load_balance_get_bucket_i (lb0,
295 (vnet_buffer (p0)->ip.flow_hash &
296 lb0->lb_n_buckets_minus_1));
297 next0 = dpo0->dpoi_next_node;
299 /* Only process the HBH Option Header if explicitly configured to do so */
301 (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
303 next0 = (dpo_is_adj (dpo0) && im->hbh_enabled) ?
304 (ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next0;
306 vnet_buffer (p0)->ip.adj_index[VLIB_TX] = dpo0->dpoi_index;
308 vlib_increment_combined_counter
309 (cm, thread_index, lbi0, 1, vlib_buffer_length_in_chain (vm, p0));
316 if (PREDICT_FALSE (next0 != next))
319 vlib_put_next_frame (vm, node, next, n_left_to_next);
321 vlib_get_next_frame (vm, node, next, to_next, n_left_to_next);
328 vlib_put_next_frame (vm, node, next, n_left_to_next);
331 if (node->flags & VLIB_NODE_FLAG_TRACE)
332 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
334 return frame->n_vectors;
338 ip6_add_interface_routes (vnet_main_t * vnm, u32 sw_if_index,
339 ip6_main_t * im, u32 fib_index,
340 ip_interface_address_t * a)
342 ip_lookup_main_t *lm = &im->lookup_main;
343 ip6_address_t *address = ip_interface_address_get_address (lm, a);
345 .fp_len = a->address_length,
346 .fp_proto = FIB_PROTOCOL_IP6,
347 .fp_addr.ip6 = *address,
350 a->neighbor_probe_adj_index = ~0;
351 if (a->address_length < 128)
353 fib_node_index_t fei;
355 fei = fib_table_entry_update_one_path (fib_index,
357 FIB_SOURCE_INTERFACE,
358 (FIB_ENTRY_FLAG_CONNECTED |
359 FIB_ENTRY_FLAG_ATTACHED),
361 /* No next-hop address */
363 /* invalid FIB index */
366 NULL, FIB_ROUTE_PATH_FLAG_NONE);
367 a->neighbor_probe_adj_index = fib_entry_get_adj (fei);
371 if (sw_if_index < vec_len (lm->classify_table_index_by_sw_if_index))
373 u32 classify_table_index =
374 lm->classify_table_index_by_sw_if_index[sw_if_index];
375 if (classify_table_index != (u32) ~ 0)
377 dpo_id_t dpo = DPO_INVALID;
382 classify_dpo_create (DPO_PROTO_IP6, classify_table_index));
384 fib_table_entry_special_dpo_add (fib_index,
387 FIB_ENTRY_FLAG_NONE, &dpo);
392 fib_table_entry_update_one_path (fib_index, &pfx,
393 FIB_SOURCE_INTERFACE,
394 (FIB_ENTRY_FLAG_CONNECTED |
395 FIB_ENTRY_FLAG_LOCAL),
399 1, NULL, FIB_ROUTE_PATH_FLAG_NONE);
403 ip6_del_interface_routes (ip6_main_t * im,
405 ip6_address_t * address, u32 address_length)
408 .fp_len = address_length,
409 .fp_proto = FIB_PROTOCOL_IP6,
410 .fp_addr.ip6 = *address,
413 if (pfx.fp_len < 128)
415 fib_table_entry_delete (fib_index, &pfx, FIB_SOURCE_INTERFACE);
420 fib_table_entry_delete (fib_index, &pfx, FIB_SOURCE_INTERFACE);
424 ip6_sw_interface_enable_disable (u32 sw_if_index, u32 is_enable)
426 ip6_main_t *im = &ip6_main;
428 vec_validate_init_empty (im->ip_enabled_by_sw_if_index, sw_if_index, 0);
431 * enable/disable only on the 1<->0 transition
435 if (1 != ++im->ip_enabled_by_sw_if_index[sw_if_index])
440 /* The ref count is 0 when an address is removed from an interface that has
441 * no address - this is not a ciritical error */
442 if (0 == im->ip_enabled_by_sw_if_index[sw_if_index] ||
443 0 != --im->ip_enabled_by_sw_if_index[sw_if_index])
447 vnet_feature_enable_disable ("ip6-unicast", "ip6-lookup", sw_if_index,
450 vnet_feature_enable_disable ("ip6-multicast", "ip6-mfib-forward-lookup",
451 sw_if_index, is_enable, 0, 0);
455 /* get first interface address */
457 ip6_interface_first_address (ip6_main_t * im, u32 sw_if_index)
459 ip_lookup_main_t *lm = &im->lookup_main;
460 ip_interface_address_t *ia = 0;
461 ip6_address_t *result = 0;
464 foreach_ip_interface_address (lm, ia, sw_if_index,
465 1 /* honor unnumbered */,
467 ip6_address_t * a = ip_interface_address_get_address (lm, ia);
476 ip6_add_del_interface_address (vlib_main_t * vm,
478 ip6_address_t * address,
479 u32 address_length, u32 is_del)
481 vnet_main_t *vnm = vnet_get_main ();
482 ip6_main_t *im = &ip6_main;
483 ip_lookup_main_t *lm = &im->lookup_main;
485 u32 if_address_index;
486 ip6_address_fib_t ip6_af, *addr_fib = 0;
488 vec_validate (im->fib_index_by_sw_if_index, sw_if_index);
489 vec_validate (im->mfib_index_by_sw_if_index, sw_if_index);
491 ip6_addr_fib_init (&ip6_af, address,
492 vec_elt (im->fib_index_by_sw_if_index, sw_if_index));
493 vec_add1 (addr_fib, ip6_af);
496 uword elts_before = pool_elts (lm->if_address_pool);
498 error = ip_interface_address_add_del
499 (lm, sw_if_index, addr_fib, address_length, is_del, &if_address_index);
503 /* Pool did not grow: add duplicate address. */
504 if (elts_before == pool_elts (lm->if_address_pool))
508 ip6_sw_interface_enable_disable (sw_if_index, !is_del);
511 ip6_del_interface_routes (im, ip6_af.fib_index, address, address_length);
513 ip6_add_interface_routes (vnm, sw_if_index,
514 im, ip6_af.fib_index,
515 pool_elt_at_index (lm->if_address_pool,
519 ip6_add_del_interface_address_callback_t *cb;
520 vec_foreach (cb, im->add_del_interface_address_callbacks)
521 cb->function (im, cb->function_opaque, sw_if_index,
522 address, address_length, if_address_index, is_del);
531 ip6_sw_interface_admin_up_down (vnet_main_t * vnm, u32 sw_if_index, u32 flags)
533 ip6_main_t *im = &ip6_main;
534 ip_interface_address_t *ia;
536 u32 is_admin_up, fib_index;
538 /* Fill in lookup tables with default table (0). */
539 vec_validate (im->fib_index_by_sw_if_index, sw_if_index);
541 vec_validate_init_empty (im->
542 lookup_main.if_address_pool_index_by_sw_if_index,
545 is_admin_up = (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) != 0;
547 fib_index = vec_elt (im->fib_index_by_sw_if_index, sw_if_index);
550 foreach_ip_interface_address (&im->lookup_main, ia, sw_if_index,
551 0 /* honor unnumbered */,
553 a = ip_interface_address_get_address (&im->lookup_main, ia);
555 ip6_add_interface_routes (vnm, sw_if_index,
559 ip6_del_interface_routes (im, fib_index,
560 a, ia->address_length);
567 VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION (ip6_sw_interface_admin_up_down);
569 /* Built-in ip6 unicast rx feature path definition */
571 VNET_FEATURE_ARC_INIT (ip6_unicast, static) =
573 .arc_name = "ip6-unicast",
574 .start_nodes = VNET_FEATURES ("ip6-input"),
575 .arc_index_ptr = &ip6_main.lookup_main.ucast_feature_arc_index,
578 VNET_FEATURE_INIT (ip6_flow_classify, static) =
580 .arc_name = "ip6-unicast",
581 .node_name = "ip6-flow-classify",
582 .runs_before = VNET_FEATURES ("ip6-inacl"),
585 VNET_FEATURE_INIT (ip6_inacl, static) =
587 .arc_name = "ip6-unicast",
588 .node_name = "ip6-inacl",
589 .runs_before = VNET_FEATURES ("ip6-policer-classify"),
592 VNET_FEATURE_INIT (ip6_policer_classify, static) =
594 .arc_name = "ip6-unicast",
595 .node_name = "ip6-policer-classify",
596 .runs_before = VNET_FEATURES ("ipsec-input-ip6"),
599 VNET_FEATURE_INIT (ip6_ipsec, static) =
601 .arc_name = "ip6-unicast",
602 .node_name = "ipsec-input-ip6",
603 .runs_before = VNET_FEATURES ("l2tp-decap"),
606 VNET_FEATURE_INIT (ip6_l2tp, static) =
608 .arc_name = "ip6-unicast",
609 .node_name = "l2tp-decap",
610 .runs_before = VNET_FEATURES ("vpath-input-ip6"),
613 VNET_FEATURE_INIT (ip6_vpath, static) =
615 .arc_name = "ip6-unicast",
616 .node_name = "vpath-input-ip6",
617 .runs_before = VNET_FEATURES ("ip6-vxlan-bypass"),
620 VNET_FEATURE_INIT (ip6_vxlan_bypass, static) =
622 .arc_name = "ip6-unicast",
623 .node_name = "ip6-vxlan-bypass",
624 .runs_before = VNET_FEATURES ("ip6-lookup"),
627 VNET_FEATURE_INIT (ip6_lookup, static) =
629 .arc_name = "ip6-unicast",
630 .node_name = "ip6-lookup",
631 .runs_before = VNET_FEATURES ("ip6-drop"),
634 VNET_FEATURE_INIT (ip6_drop, static) =
636 .arc_name = "ip6-unicast",
637 .node_name = "ip6-drop",
638 .runs_before = 0, /*last feature*/
641 /* Built-in ip6 multicast rx feature path definition (none now) */
642 VNET_FEATURE_ARC_INIT (ip6_multicast, static) =
644 .arc_name = "ip6-multicast",
645 .start_nodes = VNET_FEATURES ("ip6-input"),
646 .arc_index_ptr = &ip6_main.lookup_main.mcast_feature_arc_index,
649 VNET_FEATURE_INIT (ip6_vpath_mc, static) = {
650 .arc_name = "ip6-multicast",
651 .node_name = "vpath-input-ip6",
652 .runs_before = VNET_FEATURES ("ip6-mfib-forward-lookup"),
655 VNET_FEATURE_INIT (ip6_mc_lookup, static) = {
656 .arc_name = "ip6-multicast",
657 .node_name = "ip6-mfib-forward-lookup",
658 .runs_before = VNET_FEATURES ("ip6-drop"),
661 VNET_FEATURE_INIT (ip6_drop_mc, static) = {
662 .arc_name = "ip6-multicast",
663 .node_name = "ip6-drop",
664 .runs_before = 0, /* last feature */
667 /* Built-in ip4 tx feature path definition */
668 VNET_FEATURE_ARC_INIT (ip6_output, static) =
670 .arc_name = "ip6-output",
671 .start_nodes = VNET_FEATURES ("ip6-rewrite", "ip6-midchain"),
672 .arc_index_ptr = &ip6_main.lookup_main.output_feature_arc_index,
675 VNET_FEATURE_INIT (ip6_ipsec_output, static) = {
676 .arc_name = "ip6-output",
677 .node_name = "ipsec-output-ip6",
678 .runs_before = VNET_FEATURES ("interface-output"),
681 VNET_FEATURE_INIT (ip6_interface_output, static) = {
682 .arc_name = "ip6-output",
683 .node_name = "interface-output",
684 .runs_before = 0, /* not before any other features */
689 ip6_sw_interface_add_del (vnet_main_t * vnm, u32 sw_if_index, u32 is_add)
691 vnet_feature_enable_disable ("ip6-unicast", "ip6-drop", sw_if_index,
694 vnet_feature_enable_disable ("ip6-multicast", "ip6-drop", sw_if_index,
697 vnet_feature_enable_disable ("ip6-output", "interface-output", sw_if_index,
700 return /* no error */ 0;
703 VNET_SW_INTERFACE_ADD_DEL_FUNCTION (ip6_sw_interface_add_del);
706 ip6_lookup (vlib_main_t * vm,
707 vlib_node_runtime_t * node, vlib_frame_t * frame)
709 return ip6_lookup_inline (vm, node, frame);
712 static u8 *format_ip6_lookup_trace (u8 * s, va_list * args);
715 VLIB_REGISTER_NODE (ip6_lookup_node) =
717 .function = ip6_lookup,
718 .name = "ip6-lookup",
719 .vector_size = sizeof (u32),
720 .format_trace = format_ip6_lookup_trace,
721 .n_next_nodes = IP6_LOOKUP_N_NEXT,
722 .next_nodes = IP6_LOOKUP_NEXT_NODES,
726 VLIB_NODE_FUNCTION_MULTIARCH (ip6_lookup_node, ip6_lookup);
729 ip6_load_balance (vlib_main_t * vm,
730 vlib_node_runtime_t * node, vlib_frame_t * frame)
732 vlib_combined_counter_main_t *cm = &load_balance_main.lbm_via_counters;
733 u32 n_left_from, n_left_to_next, *from, *to_next;
734 ip_lookup_next_t next;
735 u32 thread_index = vlib_get_thread_index ();
736 ip6_main_t *im = &ip6_main;
738 from = vlib_frame_vector_args (frame);
739 n_left_from = frame->n_vectors;
740 next = node->cached_next_index;
742 if (node->flags & VLIB_NODE_FLAG_TRACE)
743 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
745 while (n_left_from > 0)
747 vlib_get_next_frame (vm, node, next, to_next, n_left_to_next);
750 while (n_left_from >= 4 && n_left_to_next >= 2)
752 ip_lookup_next_t next0, next1;
753 const load_balance_t *lb0, *lb1;
754 vlib_buffer_t *p0, *p1;
755 u32 pi0, lbi0, hc0, pi1, lbi1, hc1;
756 const ip6_header_t *ip0, *ip1;
757 const dpo_id_t *dpo0, *dpo1;
759 /* Prefetch next iteration. */
761 vlib_buffer_t *p2, *p3;
763 p2 = vlib_get_buffer (vm, from[2]);
764 p3 = vlib_get_buffer (vm, from[3]);
766 vlib_prefetch_buffer_header (p2, STORE);
767 vlib_prefetch_buffer_header (p3, STORE);
769 CLIB_PREFETCH (p2->data, sizeof (ip0[0]), STORE);
770 CLIB_PREFETCH (p3->data, sizeof (ip0[0]), STORE);
773 pi0 = to_next[0] = from[0];
774 pi1 = to_next[1] = from[1];
781 p0 = vlib_get_buffer (vm, pi0);
782 p1 = vlib_get_buffer (vm, pi1);
784 ip0 = vlib_buffer_get_current (p0);
785 ip1 = vlib_buffer_get_current (p1);
786 lbi0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
787 lbi1 = vnet_buffer (p1)->ip.adj_index[VLIB_TX];
789 lb0 = load_balance_get (lbi0);
790 lb1 = load_balance_get (lbi1);
793 * this node is for via FIBs we can re-use the hash value from the
794 * to node if present.
795 * We don't want to use the same hash value at each level in the recursion
796 * graph as that would lead to polarisation
800 if (PREDICT_FALSE (lb0->lb_n_buckets > 1))
802 if (PREDICT_TRUE (vnet_buffer (p0)->ip.flow_hash))
804 hc0 = vnet_buffer (p0)->ip.flow_hash =
805 vnet_buffer (p0)->ip.flow_hash >> 1;
809 hc0 = vnet_buffer (p0)->ip.flow_hash =
810 ip6_compute_flow_hash (ip0, lb0->lb_hash_config);
813 load_balance_get_fwd_bucket (lb0,
815 lb0->lb_n_buckets_minus_1));
819 dpo0 = load_balance_get_bucket_i (lb0, 0);
821 if (PREDICT_FALSE (lb1->lb_n_buckets > 1))
823 if (PREDICT_TRUE (vnet_buffer (p1)->ip.flow_hash))
825 hc1 = vnet_buffer (p1)->ip.flow_hash =
826 vnet_buffer (p1)->ip.flow_hash >> 1;
830 hc1 = vnet_buffer (p1)->ip.flow_hash =
831 ip6_compute_flow_hash (ip1, lb1->lb_hash_config);
834 load_balance_get_fwd_bucket (lb1,
836 lb1->lb_n_buckets_minus_1));
840 dpo1 = load_balance_get_bucket_i (lb1, 0);
843 next0 = dpo0->dpoi_next_node;
844 next1 = dpo1->dpoi_next_node;
846 /* Only process the HBH Option Header if explicitly configured to do so */
848 (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
850 next0 = (dpo_is_adj (dpo0) && im->hbh_enabled) ?
851 (ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next0;
853 /* Only process the HBH Option Header if explicitly configured to do so */
855 (ip1->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
857 next1 = (dpo_is_adj (dpo1) && im->hbh_enabled) ?
858 (ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next1;
861 vnet_buffer (p0)->ip.adj_index[VLIB_TX] = dpo0->dpoi_index;
862 vnet_buffer (p1)->ip.adj_index[VLIB_TX] = dpo1->dpoi_index;
864 vlib_increment_combined_counter
865 (cm, thread_index, lbi0, 1, vlib_buffer_length_in_chain (vm, p0));
866 vlib_increment_combined_counter
867 (cm, thread_index, lbi1, 1, vlib_buffer_length_in_chain (vm, p1));
869 vlib_validate_buffer_enqueue_x2 (vm, node, next,
870 to_next, n_left_to_next,
871 pi0, pi1, next0, next1);
874 while (n_left_from > 0 && n_left_to_next > 0)
876 ip_lookup_next_t next0;
877 const load_balance_t *lb0;
880 const ip6_header_t *ip0;
881 const dpo_id_t *dpo0;
890 p0 = vlib_get_buffer (vm, pi0);
892 ip0 = vlib_buffer_get_current (p0);
893 lbi0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
895 lb0 = load_balance_get (lbi0);
898 if (PREDICT_FALSE (lb0->lb_n_buckets > 1))
900 if (PREDICT_TRUE (vnet_buffer (p0)->ip.flow_hash))
902 hc0 = vnet_buffer (p0)->ip.flow_hash =
903 vnet_buffer (p0)->ip.flow_hash >> 1;
907 hc0 = vnet_buffer (p0)->ip.flow_hash =
908 ip6_compute_flow_hash (ip0, lb0->lb_hash_config);
911 load_balance_get_fwd_bucket (lb0,
913 lb0->lb_n_buckets_minus_1));
917 dpo0 = load_balance_get_bucket_i (lb0, 0);
920 next0 = dpo0->dpoi_next_node;
921 vnet_buffer (p0)->ip.adj_index[VLIB_TX] = dpo0->dpoi_index;
923 /* Only process the HBH Option Header if explicitly configured to do so */
925 (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
927 next0 = (dpo_is_adj (dpo0) && im->hbh_enabled) ?
928 (ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next0;
931 vlib_increment_combined_counter
932 (cm, thread_index, lbi0, 1, vlib_buffer_length_in_chain (vm, p0));
934 vlib_validate_buffer_enqueue_x1 (vm, node, next,
935 to_next, n_left_to_next,
939 vlib_put_next_frame (vm, node, next, n_left_to_next);
942 return frame->n_vectors;
946 VLIB_REGISTER_NODE (ip6_load_balance_node) =
948 .function = ip6_load_balance,
949 .name = "ip6-load-balance",
950 .vector_size = sizeof (u32),
951 .sibling_of = "ip6-lookup",
952 .format_trace = format_ip6_lookup_trace,
956 VLIB_NODE_FUNCTION_MULTIARCH (ip6_load_balance_node, ip6_load_balance);
960 /* Adjacency taken. */
965 /* Packet data, possibly *after* rewrite. */
966 u8 packet_data[128 - 1 * sizeof (u32)];
968 ip6_forward_next_trace_t;
971 format_ip6_forward_next_trace (u8 * s, va_list * args)
973 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
974 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
975 ip6_forward_next_trace_t *t = va_arg (*args, ip6_forward_next_trace_t *);
976 uword indent = format_get_indent (s);
978 s = format (s, "%U%U",
979 format_white_space, indent,
980 format_ip6_header, t->packet_data, sizeof (t->packet_data));
985 format_ip6_lookup_trace (u8 * s, va_list * args)
987 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
988 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
989 ip6_forward_next_trace_t *t = va_arg (*args, ip6_forward_next_trace_t *);
990 uword indent = format_get_indent (s);
992 s = format (s, "fib %d dpo-idx %d flow hash: 0x%08x",
993 t->fib_index, t->adj_index, t->flow_hash);
994 s = format (s, "\n%U%U",
995 format_white_space, indent,
996 format_ip6_header, t->packet_data, sizeof (t->packet_data));
1002 format_ip6_rewrite_trace (u8 * s, va_list * args)
1004 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
1005 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
1006 ip6_forward_next_trace_t *t = va_arg (*args, ip6_forward_next_trace_t *);
1007 uword indent = format_get_indent (s);
1009 s = format (s, "tx_sw_if_index %d adj-idx %d : %U flow hash: 0x%08x",
1010 t->fib_index, t->adj_index, format_ip_adjacency,
1011 t->adj_index, FORMAT_IP_ADJACENCY_NONE, t->flow_hash);
1012 s = format (s, "\n%U%U",
1013 format_white_space, indent,
1014 format_ip_adjacency_packet_data,
1015 t->adj_index, t->packet_data, sizeof (t->packet_data));
1019 /* Common trace function for all ip6-forward next nodes. */
1021 ip6_forward_next_trace (vlib_main_t * vm,
1022 vlib_node_runtime_t * node,
1023 vlib_frame_t * frame, vlib_rx_or_tx_t which_adj_index)
1026 ip6_main_t *im = &ip6_main;
1028 n_left = frame->n_vectors;
1029 from = vlib_frame_vector_args (frame);
1034 vlib_buffer_t *b0, *b1;
1035 ip6_forward_next_trace_t *t0, *t1;
1037 /* Prefetch next iteration. */
1038 vlib_prefetch_buffer_with_index (vm, from[2], LOAD);
1039 vlib_prefetch_buffer_with_index (vm, from[3], LOAD);
1044 b0 = vlib_get_buffer (vm, bi0);
1045 b1 = vlib_get_buffer (vm, bi1);
1047 if (b0->flags & VLIB_BUFFER_IS_TRACED)
1049 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
1050 t0->adj_index = vnet_buffer (b0)->ip.adj_index[which_adj_index];
1051 t0->flow_hash = vnet_buffer (b0)->ip.flow_hash;
1053 (vnet_buffer (b0)->sw_if_index[VLIB_TX] !=
1054 (u32) ~ 0) ? vnet_buffer (b0)->sw_if_index[VLIB_TX] :
1055 vec_elt (im->fib_index_by_sw_if_index,
1056 vnet_buffer (b0)->sw_if_index[VLIB_RX]);
1058 clib_memcpy (t0->packet_data,
1059 vlib_buffer_get_current (b0),
1060 sizeof (t0->packet_data));
1062 if (b1->flags & VLIB_BUFFER_IS_TRACED)
1064 t1 = vlib_add_trace (vm, node, b1, sizeof (t1[0]));
1065 t1->adj_index = vnet_buffer (b1)->ip.adj_index[which_adj_index];
1066 t1->flow_hash = vnet_buffer (b1)->ip.flow_hash;
1068 (vnet_buffer (b1)->sw_if_index[VLIB_TX] !=
1069 (u32) ~ 0) ? vnet_buffer (b1)->sw_if_index[VLIB_TX] :
1070 vec_elt (im->fib_index_by_sw_if_index,
1071 vnet_buffer (b1)->sw_if_index[VLIB_RX]);
1073 clib_memcpy (t1->packet_data,
1074 vlib_buffer_get_current (b1),
1075 sizeof (t1->packet_data));
1085 ip6_forward_next_trace_t *t0;
1089 b0 = vlib_get_buffer (vm, bi0);
1091 if (b0->flags & VLIB_BUFFER_IS_TRACED)
1093 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
1094 t0->adj_index = vnet_buffer (b0)->ip.adj_index[which_adj_index];
1095 t0->flow_hash = vnet_buffer (b0)->ip.flow_hash;
1097 (vnet_buffer (b0)->sw_if_index[VLIB_TX] !=
1098 (u32) ~ 0) ? vnet_buffer (b0)->sw_if_index[VLIB_TX] :
1099 vec_elt (im->fib_index_by_sw_if_index,
1100 vnet_buffer (b0)->sw_if_index[VLIB_RX]);
1102 clib_memcpy (t0->packet_data,
1103 vlib_buffer_get_current (b0),
1104 sizeof (t0->packet_data));
1112 ip6_drop_or_punt (vlib_main_t * vm,
1113 vlib_node_runtime_t * node,
1114 vlib_frame_t * frame, ip6_error_t error_code)
1116 u32 *buffers = vlib_frame_vector_args (frame);
1117 uword n_packets = frame->n_vectors;
1119 vlib_error_drop_buffers (vm, node, buffers,
1123 ip6_input_node.index, error_code);
1125 if (node->flags & VLIB_NODE_FLAG_TRACE)
1126 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
1132 ip6_drop (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
1134 return ip6_drop_or_punt (vm, node, frame, IP6_ERROR_ADJACENCY_DROP);
1138 ip6_punt (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
1140 return ip6_drop_or_punt (vm, node, frame, IP6_ERROR_ADJACENCY_PUNT);
1144 VLIB_REGISTER_NODE (ip6_drop_node, static) =
1146 .function = ip6_drop,
1148 .vector_size = sizeof (u32),
1149 .format_trace = format_ip6_forward_next_trace,
1153 [0] = "error-drop",},
1157 VLIB_NODE_FUNCTION_MULTIARCH (ip6_drop_node, ip6_drop);
1160 VLIB_REGISTER_NODE (ip6_punt_node, static) =
1162 .function = ip6_punt,
1164 .vector_size = sizeof (u32),
1165 .format_trace = format_ip6_forward_next_trace,
1169 [0] = "error-punt",},
1173 VLIB_NODE_FUNCTION_MULTIARCH (ip6_punt_node, ip6_punt);
1175 /* Compute TCP/UDP/ICMP6 checksum in software. */
1177 ip6_tcp_udp_icmp_compute_checksum (vlib_main_t * vm, vlib_buffer_t * p0,
1178 ip6_header_t * ip0, int *bogus_lengthp)
1181 u16 sum16, payload_length_host_byte_order;
1182 u32 i, n_this_buffer, n_bytes_left;
1183 u32 headers_size = sizeof (ip0[0]);
1184 void *data_this_buffer;
1186 ASSERT (bogus_lengthp);
1189 /* Initialize checksum with ip header. */
1190 sum0 = ip0->payload_length + clib_host_to_net_u16 (ip0->protocol);
1191 payload_length_host_byte_order = clib_net_to_host_u16 (ip0->payload_length);
1192 data_this_buffer = (void *) (ip0 + 1);
1194 for (i = 0; i < ARRAY_LEN (ip0->src_address.as_uword); i++)
1196 sum0 = ip_csum_with_carry (sum0,
1197 clib_mem_unaligned (&ip0->
1198 src_address.as_uword[i],
1201 ip_csum_with_carry (sum0,
1202 clib_mem_unaligned (&ip0->dst_address.as_uword[i],
1206 /* some icmp packets may come with a "router alert" hop-by-hop extension header (e.g., mldv2 packets)
1207 * or UDP-Ping packets */
1208 if (PREDICT_FALSE (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
1211 ip6_hop_by_hop_ext_t *ext_hdr =
1212 (ip6_hop_by_hop_ext_t *) data_this_buffer;
1214 /* validate really icmp6 next */
1215 ASSERT ((ext_hdr->next_hdr == IP_PROTOCOL_ICMP6)
1216 || (ext_hdr->next_hdr == IP_PROTOCOL_UDP));
1218 skip_bytes = 8 * (1 + ext_hdr->n_data_u64s);
1219 data_this_buffer = (void *) ((u8 *) data_this_buffer + skip_bytes);
1221 payload_length_host_byte_order -= skip_bytes;
1222 headers_size += skip_bytes;
1225 n_bytes_left = n_this_buffer = payload_length_host_byte_order;
1226 if (p0 && n_this_buffer + headers_size > p0->current_length)
1228 p0->current_length >
1229 headers_size ? p0->current_length - headers_size : 0;
1232 sum0 = ip_incremental_checksum (sum0, data_this_buffer, n_this_buffer);
1233 n_bytes_left -= n_this_buffer;
1234 if (n_bytes_left == 0)
1237 if (!(p0->flags & VLIB_BUFFER_NEXT_PRESENT))
1242 p0 = vlib_get_buffer (vm, p0->next_buffer);
1243 data_this_buffer = vlib_buffer_get_current (p0);
1244 n_this_buffer = p0->current_length;
1247 sum16 = ~ip_csum_fold (sum0);
1253 ip6_tcp_udp_icmp_validate_checksum (vlib_main_t * vm, vlib_buffer_t * p0)
1255 ip6_header_t *ip0 = vlib_buffer_get_current (p0);
1260 /* some icmp packets may come with a "router alert" hop-by-hop extension header (e.g., mldv2 packets) */
1261 ASSERT (ip0->protocol == IP_PROTOCOL_TCP
1262 || ip0->protocol == IP_PROTOCOL_ICMP6
1263 || ip0->protocol == IP_PROTOCOL_UDP
1264 || ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS);
1266 udp0 = (void *) (ip0 + 1);
1267 if (ip0->protocol == IP_PROTOCOL_UDP && udp0->checksum == 0)
1269 p0->flags |= (IP_BUFFER_L4_CHECKSUM_COMPUTED
1270 | IP_BUFFER_L4_CHECKSUM_CORRECT);
1274 sum16 = ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip0, &bogus_length);
1276 p0->flags |= (IP_BUFFER_L4_CHECKSUM_COMPUTED
1277 | ((sum16 == 0) << LOG2_IP_BUFFER_L4_CHECKSUM_CORRECT));
1283 * @brief returns number of links on which src is reachable.
1286 ip6_urpf_loose_check (ip6_main_t * im, vlib_buffer_t * b, ip6_header_t * i)
1288 const load_balance_t *lb0;
1291 lbi = ip6_fib_table_fwding_lookup_with_if_index (im,
1293 (b)->sw_if_index[VLIB_RX],
1296 lb0 = load_balance_get (lbi);
1298 return (fib_urpf_check_size (lb0->lb_urpf));
1302 ip6_local (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
1304 ip6_main_t *im = &ip6_main;
1305 ip_lookup_main_t *lm = &im->lookup_main;
1306 ip_local_next_t next_index;
1307 u32 *from, *to_next, n_left_from, n_left_to_next;
1308 vlib_node_runtime_t *error_node =
1309 vlib_node_get_runtime (vm, ip6_input_node.index);
1311 from = vlib_frame_vector_args (frame);
1312 n_left_from = frame->n_vectors;
1313 next_index = node->cached_next_index;
1315 if (node->flags & VLIB_NODE_FLAG_TRACE)
1316 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
1318 while (n_left_from > 0)
1320 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1322 while (n_left_from >= 4 && n_left_to_next >= 2)
1324 vlib_buffer_t *p0, *p1;
1325 ip6_header_t *ip0, *ip1;
1326 udp_header_t *udp0, *udp1;
1327 u32 pi0, ip_len0, udp_len0, flags0, next0;
1328 u32 pi1, ip_len1, udp_len1, flags1, next1;
1329 i32 len_diff0, len_diff1;
1330 u8 error0, type0, good_l4_checksum0;
1331 u8 error1, type1, good_l4_checksum1;
1332 u32 udp_offset0, udp_offset1;
1334 pi0 = to_next[0] = from[0];
1335 pi1 = to_next[1] = from[1];
1339 n_left_to_next -= 2;
1341 p0 = vlib_get_buffer (vm, pi0);
1342 p1 = vlib_get_buffer (vm, pi1);
1344 ip0 = vlib_buffer_get_current (p0);
1345 ip1 = vlib_buffer_get_current (p1);
1347 vnet_buffer (p0)->ip.start_of_ip_header = p0->current_data;
1348 vnet_buffer (p1)->ip.start_of_ip_header = p1->current_data;
1350 type0 = lm->builtin_protocol_by_ip_protocol[ip0->protocol];
1351 type1 = lm->builtin_protocol_by_ip_protocol[ip1->protocol];
1353 next0 = lm->local_next_by_ip_protocol[ip0->protocol];
1354 next1 = lm->local_next_by_ip_protocol[ip1->protocol];
1359 good_l4_checksum0 = (flags0 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0;
1360 good_l4_checksum1 = (flags1 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0;
1364 if (PREDICT_TRUE (IP_PROTOCOL_UDP == ip6_locate_header (p0, ip0,
1368 udp0 = (udp_header_t *) ((u8 *) ip0 + udp_offset0);
1369 /* Don't verify UDP checksum for packets with explicit zero checksum. */
1370 good_l4_checksum0 |= type0 == IP_BUILTIN_PROTOCOL_UDP
1371 && udp0->checksum == 0;
1372 /* Verify UDP length. */
1373 ip_len0 = clib_net_to_host_u16 (ip0->payload_length);
1374 udp_len0 = clib_net_to_host_u16 (udp0->length);
1375 len_diff0 = ip_len0 - udp_len0;
1377 if (PREDICT_TRUE (IP_PROTOCOL_UDP == ip6_locate_header (p1, ip1,
1381 udp1 = (udp_header_t *) ((u8 *) ip1 + udp_offset1);
1382 /* Don't verify UDP checksum for packets with explicit zero checksum. */
1383 good_l4_checksum1 |= type1 == IP_BUILTIN_PROTOCOL_UDP
1384 && udp1->checksum == 0;
1385 /* Verify UDP length. */
1386 ip_len1 = clib_net_to_host_u16 (ip1->payload_length);
1387 udp_len1 = clib_net_to_host_u16 (udp1->length);
1388 len_diff1 = ip_len1 - udp_len1;
1391 good_l4_checksum0 |= type0 == IP_BUILTIN_PROTOCOL_UNKNOWN;
1392 good_l4_checksum1 |= type1 == IP_BUILTIN_PROTOCOL_UNKNOWN;
1394 len_diff0 = type0 == IP_BUILTIN_PROTOCOL_UDP ? len_diff0 : 0;
1395 len_diff1 = type1 == IP_BUILTIN_PROTOCOL_UDP ? len_diff1 : 0;
1397 if (PREDICT_FALSE (type0 != IP_BUILTIN_PROTOCOL_UNKNOWN
1398 && !good_l4_checksum0
1399 && !(flags0 & IP_BUFFER_L4_CHECKSUM_COMPUTED)))
1401 flags0 = ip6_tcp_udp_icmp_validate_checksum (vm, p0);
1403 (flags0 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0;
1405 if (PREDICT_FALSE (type1 != IP_BUILTIN_PROTOCOL_UNKNOWN
1406 && !good_l4_checksum1
1407 && !(flags1 & IP_BUFFER_L4_CHECKSUM_COMPUTED)))
1409 flags1 = ip6_tcp_udp_icmp_validate_checksum (vm, p1);
1411 (flags1 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0;
1414 error0 = error1 = IP6_ERROR_UNKNOWN_PROTOCOL;
1416 error0 = len_diff0 < 0 ? IP6_ERROR_UDP_LENGTH : error0;
1417 error1 = len_diff1 < 0 ? IP6_ERROR_UDP_LENGTH : error1;
1419 ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_UDP ==
1420 IP6_ERROR_UDP_CHECKSUM);
1421 ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_ICMP ==
1422 IP6_ERROR_ICMP_CHECKSUM);
1424 (!good_l4_checksum0 ? IP6_ERROR_UDP_CHECKSUM + type0 : error0);
1426 (!good_l4_checksum1 ? IP6_ERROR_UDP_CHECKSUM + type1 : error1);
1428 /* Drop packets from unroutable hosts. */
1429 /* If this is a neighbor solicitation (ICMP), skip source RPF check */
1430 if (error0 == IP6_ERROR_UNKNOWN_PROTOCOL &&
1431 type0 != IP_BUILTIN_PROTOCOL_ICMP &&
1432 !ip6_address_is_link_local_unicast (&ip0->src_address))
1434 error0 = (!ip6_urpf_loose_check (im, p0, ip0)
1435 ? IP6_ERROR_SRC_LOOKUP_MISS : error0);
1437 if (error1 == IP6_ERROR_UNKNOWN_PROTOCOL &&
1438 type1 != IP_BUILTIN_PROTOCOL_ICMP &&
1439 !ip6_address_is_link_local_unicast (&ip1->src_address))
1441 error1 = (!ip6_urpf_loose_check (im, p1, ip1)
1442 ? IP6_ERROR_SRC_LOOKUP_MISS : error1);
1446 error0 != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next0;
1448 error1 != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next1;
1450 p0->error = error_node->errors[error0];
1451 p1->error = error_node->errors[error1];
1453 vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
1454 to_next, n_left_to_next,
1455 pi0, pi1, next0, next1);
1458 while (n_left_from > 0 && n_left_to_next > 0)
1463 u32 pi0, ip_len0, udp_len0, flags0, next0;
1465 u8 error0, type0, good_l4_checksum0;
1468 pi0 = to_next[0] = from[0];
1472 n_left_to_next -= 1;
1474 p0 = vlib_get_buffer (vm, pi0);
1476 ip0 = vlib_buffer_get_current (p0);
1478 vnet_buffer (p0)->ip.start_of_ip_header = p0->current_data;
1480 type0 = lm->builtin_protocol_by_ip_protocol[ip0->protocol];
1481 next0 = lm->local_next_by_ip_protocol[ip0->protocol];
1485 good_l4_checksum0 = (flags0 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0;
1488 if (PREDICT_TRUE (IP_PROTOCOL_UDP == ip6_locate_header (p0, ip0,
1492 udp0 = (udp_header_t *) ((u8 *) ip0 + udp_offset0);
1493 /* Don't verify UDP checksum for packets with explicit zero checksum. */
1494 good_l4_checksum0 |= type0 == IP_BUILTIN_PROTOCOL_UDP
1495 && udp0->checksum == 0;
1496 /* Verify UDP length. */
1497 ip_len0 = clib_net_to_host_u16 (ip0->payload_length);
1498 udp_len0 = clib_net_to_host_u16 (udp0->length);
1499 len_diff0 = ip_len0 - udp_len0;
1502 good_l4_checksum0 |= type0 == IP_BUILTIN_PROTOCOL_UNKNOWN;
1503 len_diff0 = type0 == IP_BUILTIN_PROTOCOL_UDP ? len_diff0 : 0;
1505 if (PREDICT_FALSE (type0 != IP_BUILTIN_PROTOCOL_UNKNOWN
1506 && !good_l4_checksum0
1507 && !(flags0 & IP_BUFFER_L4_CHECKSUM_COMPUTED)))
1509 flags0 = ip6_tcp_udp_icmp_validate_checksum (vm, p0);
1511 (flags0 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0;
1514 error0 = IP6_ERROR_UNKNOWN_PROTOCOL;
1516 error0 = len_diff0 < 0 ? IP6_ERROR_UDP_LENGTH : error0;
1518 ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_UDP ==
1519 IP6_ERROR_UDP_CHECKSUM);
1520 ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_ICMP ==
1521 IP6_ERROR_ICMP_CHECKSUM);
1523 (!good_l4_checksum0 ? IP6_ERROR_UDP_CHECKSUM + type0 : error0);
1525 /* If this is a neighbor solicitation (ICMP), skip source RPF check */
1526 if (error0 == IP6_ERROR_UNKNOWN_PROTOCOL &&
1527 type0 != IP_BUILTIN_PROTOCOL_ICMP &&
1528 !ip6_address_is_link_local_unicast (&ip0->src_address))
1530 error0 = (!ip6_urpf_loose_check (im, p0, ip0)
1531 ? IP6_ERROR_SRC_LOOKUP_MISS : error0);
1535 error0 != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next0;
1537 p0->error = error_node->errors[error0];
1539 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1540 to_next, n_left_to_next,
1544 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1547 return frame->n_vectors;
1551 VLIB_REGISTER_NODE (ip6_local_node, static) =
1553 .function = ip6_local,
1554 .name = "ip6-local",
1555 .vector_size = sizeof (u32),
1556 .format_trace = format_ip6_forward_next_trace,
1557 .n_next_nodes = IP_LOCAL_N_NEXT,
1560 [IP_LOCAL_NEXT_DROP] = "error-drop",
1561 [IP_LOCAL_NEXT_PUNT] = "error-punt",
1562 [IP_LOCAL_NEXT_UDP_LOOKUP] = "ip6-udp-lookup",
1563 [IP_LOCAL_NEXT_ICMP] = "ip6-icmp-input",
1568 VLIB_NODE_FUNCTION_MULTIARCH (ip6_local_node, ip6_local);
1571 ip6_register_protocol (u32 protocol, u32 node_index)
1573 vlib_main_t *vm = vlib_get_main ();
1574 ip6_main_t *im = &ip6_main;
1575 ip_lookup_main_t *lm = &im->lookup_main;
1577 ASSERT (protocol < ARRAY_LEN (lm->local_next_by_ip_protocol));
1578 lm->local_next_by_ip_protocol[protocol] =
1579 vlib_node_add_next (vm, ip6_local_node.index, node_index);
1584 IP6_DISCOVER_NEIGHBOR_NEXT_DROP,
1585 IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX,
1586 IP6_DISCOVER_NEIGHBOR_N_NEXT,
1587 } ip6_discover_neighbor_next_t;
1591 IP6_DISCOVER_NEIGHBOR_ERROR_DROP,
1592 IP6_DISCOVER_NEIGHBOR_ERROR_REQUEST_SENT,
1593 IP6_DISCOVER_NEIGHBOR_ERROR_NO_SOURCE_ADDRESS,
1594 } ip6_discover_neighbor_error_t;
1597 ip6_discover_neighbor_inline (vlib_main_t * vm,
1598 vlib_node_runtime_t * node,
1599 vlib_frame_t * frame, int is_glean)
1601 vnet_main_t *vnm = vnet_get_main ();
1602 ip6_main_t *im = &ip6_main;
1603 ip_lookup_main_t *lm = &im->lookup_main;
1604 u32 *from, *to_next_drop;
1605 uword n_left_from, n_left_to_next_drop;
1606 static f64 time_last_seed_change = -1e100;
1607 static u32 hash_seeds[3];
1608 static uword hash_bitmap[256 / BITS (uword)];
1612 if (node->flags & VLIB_NODE_FLAG_TRACE)
1613 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
1615 time_now = vlib_time_now (vm);
1616 if (time_now - time_last_seed_change > 1e-3)
1619 u32 *r = clib_random_buffer_get_data (&vm->random_buffer,
1620 sizeof (hash_seeds));
1621 for (i = 0; i < ARRAY_LEN (hash_seeds); i++)
1622 hash_seeds[i] = r[i];
1624 /* Mark all hash keys as been not-seen before. */
1625 for (i = 0; i < ARRAY_LEN (hash_bitmap); i++)
1628 time_last_seed_change = time_now;
1631 from = vlib_frame_vector_args (frame);
1632 n_left_from = frame->n_vectors;
1634 while (n_left_from > 0)
1636 vlib_get_next_frame (vm, node, IP6_DISCOVER_NEIGHBOR_NEXT_DROP,
1637 to_next_drop, n_left_to_next_drop);
1639 while (n_left_from > 0 && n_left_to_next_drop > 0)
1643 u32 pi0, adj_index0, a0, b0, c0, m0, sw_if_index0, drop0;
1645 ip_adjacency_t *adj0;
1646 vnet_hw_interface_t *hw_if0;
1651 p0 = vlib_get_buffer (vm, pi0);
1653 adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
1655 ip0 = vlib_buffer_get_current (p0);
1657 adj0 = adj_get (adj_index0);
1661 ip0->dst_address.as_u64[0] =
1662 adj0->sub_type.nbr.next_hop.ip6.as_u64[0];
1663 ip0->dst_address.as_u64[1] =
1664 adj0->sub_type.nbr.next_hop.ip6.as_u64[1];
1671 sw_if_index0 = adj0->rewrite_header.sw_if_index;
1672 vnet_buffer (p0)->sw_if_index[VLIB_TX] = sw_if_index0;
1675 b0 ^= ip0->dst_address.as_u32[0];
1676 c0 ^= ip0->dst_address.as_u32[1];
1678 hash_v3_mix32 (a0, b0, c0);
1680 b0 ^= ip0->dst_address.as_u32[2];
1681 c0 ^= ip0->dst_address.as_u32[3];
1683 hash_v3_finalize32 (a0, b0, c0);
1685 c0 &= BITS (hash_bitmap) - 1;
1686 c0 = c0 / BITS (uword);
1687 m0 = (uword) 1 << (c0 % BITS (uword));
1689 bm0 = hash_bitmap[c0];
1690 drop0 = (bm0 & m0) != 0;
1692 /* Mark it as seen. */
1693 hash_bitmap[c0] = bm0 | m0;
1697 to_next_drop[0] = pi0;
1699 n_left_to_next_drop -= 1;
1701 hw_if0 = vnet_get_sup_hw_interface (vnm, sw_if_index0);
1703 /* If the interface is link-down, drop the pkt */
1704 if (!(hw_if0->flags & VNET_HW_INTERFACE_FLAG_LINK_UP))
1708 node->errors[drop0 ? IP6_DISCOVER_NEIGHBOR_ERROR_DROP
1709 : IP6_DISCOVER_NEIGHBOR_ERROR_REQUEST_SENT];
1714 * the adj has been updated to a rewrite but the node the DPO that got
1715 * us here hasn't - yet. no big deal. we'll drop while we wait.
1717 if (IP_LOOKUP_NEXT_REWRITE == adj0->lookup_next_index)
1722 icmp6_neighbor_solicitation_header_t *h0;
1725 h0 = vlib_packet_template_get_packet
1726 (vm, &im->discover_neighbor_packet_template, &bi0);
1729 * Build ethernet header.
1730 * Choose source address based on destination lookup
1733 if (ip6_src_address_for_packet (lm,
1735 &h0->ip.src_address))
1737 /* There is no address on the interface */
1739 node->errors[IP6_DISCOVER_NEIGHBOR_ERROR_NO_SOURCE_ADDRESS];
1740 vlib_buffer_free (vm, &bi0, 1);
1745 * Destination address is a solicited node multicast address.
1746 * We need to fill in
1747 * the low 24 bits with low 24 bits of target's address.
1749 h0->ip.dst_address.as_u8[13] = ip0->dst_address.as_u8[13];
1750 h0->ip.dst_address.as_u8[14] = ip0->dst_address.as_u8[14];
1751 h0->ip.dst_address.as_u8[15] = ip0->dst_address.as_u8[15];
1753 h0->neighbor.target_address = ip0->dst_address;
1755 clib_memcpy (h0->link_layer_option.ethernet_address,
1756 hw_if0->hw_address, vec_len (hw_if0->hw_address));
1758 /* $$$$ appears we need this; why is the checksum non-zero? */
1759 h0->neighbor.icmp.checksum = 0;
1760 h0->neighbor.icmp.checksum =
1761 ip6_tcp_udp_icmp_compute_checksum (vm, 0, &h0->ip,
1764 ASSERT (bogus_length == 0);
1766 vlib_buffer_copy_trace_flag (vm, p0, bi0);
1767 b0 = vlib_get_buffer (vm, bi0);
1768 vnet_buffer (b0)->sw_if_index[VLIB_TX]
1769 = vnet_buffer (p0)->sw_if_index[VLIB_TX];
1771 /* Add rewrite/encap string. */
1772 vnet_rewrite_one_header (adj0[0], h0, sizeof (ethernet_header_t));
1773 vlib_buffer_advance (b0, -adj0->rewrite_header.data_bytes);
1775 next0 = IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX;
1777 vlib_set_next_frame_buffer (vm, node, next0, bi0);
1781 vlib_put_next_frame (vm, node, IP6_DISCOVER_NEIGHBOR_NEXT_DROP,
1782 n_left_to_next_drop);
1785 return frame->n_vectors;
1789 ip6_discover_neighbor (vlib_main_t * vm,
1790 vlib_node_runtime_t * node, vlib_frame_t * frame)
1792 return (ip6_discover_neighbor_inline (vm, node, frame, 0));
1796 ip6_glean (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
1798 return (ip6_discover_neighbor_inline (vm, node, frame, 1));
1801 static char *ip6_discover_neighbor_error_strings[] = {
1802 [IP6_DISCOVER_NEIGHBOR_ERROR_DROP] = "address overflow drops",
1803 [IP6_DISCOVER_NEIGHBOR_ERROR_REQUEST_SENT] = "neighbor solicitations sent",
1804 [IP6_DISCOVER_NEIGHBOR_ERROR_NO_SOURCE_ADDRESS]
1805 = "no source address for ND solicitation",
1809 VLIB_REGISTER_NODE (ip6_discover_neighbor_node) =
1811 .function = ip6_discover_neighbor,
1812 .name = "ip6-discover-neighbor",
1813 .vector_size = sizeof (u32),
1814 .format_trace = format_ip6_forward_next_trace,
1815 .n_errors = ARRAY_LEN (ip6_discover_neighbor_error_strings),
1816 .error_strings = ip6_discover_neighbor_error_strings,
1817 .n_next_nodes = IP6_DISCOVER_NEIGHBOR_N_NEXT,
1820 [IP6_DISCOVER_NEIGHBOR_NEXT_DROP] = "error-drop",
1821 [IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX] = "interface-output",
1827 VLIB_REGISTER_NODE (ip6_glean_node) =
1829 .function = ip6_glean,
1830 .name = "ip6-glean",
1831 .vector_size = sizeof (u32),
1832 .format_trace = format_ip6_forward_next_trace,
1833 .n_errors = ARRAY_LEN (ip6_discover_neighbor_error_strings),
1834 .error_strings = ip6_discover_neighbor_error_strings,
1835 .n_next_nodes = IP6_DISCOVER_NEIGHBOR_N_NEXT,
1838 [IP6_DISCOVER_NEIGHBOR_NEXT_DROP] = "error-drop",
1839 [IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX] = "interface-output",
1845 ip6_probe_neighbor (vlib_main_t * vm, ip6_address_t * dst, u32 sw_if_index)
1847 vnet_main_t *vnm = vnet_get_main ();
1848 ip6_main_t *im = &ip6_main;
1849 icmp6_neighbor_solicitation_header_t *h;
1851 ip_interface_address_t *ia;
1852 ip_adjacency_t *adj;
1853 vnet_hw_interface_t *hi;
1854 vnet_sw_interface_t *si;
1859 si = vnet_get_sw_interface (vnm, sw_if_index);
1861 if (!(si->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP))
1863 return clib_error_return (0, "%U: interface %U down",
1864 format_ip6_address, dst,
1865 format_vnet_sw_if_index_name, vnm,
1870 ip6_interface_address_matching_destination (im, dst, sw_if_index, &ia);
1873 vnm->api_errno = VNET_API_ERROR_NO_MATCHING_INTERFACE;
1874 return clib_error_return
1875 (0, "no matching interface address for destination %U (interface %U)",
1876 format_ip6_address, dst,
1877 format_vnet_sw_if_index_name, vnm, sw_if_index);
1881 vlib_packet_template_get_packet (vm,
1882 &im->discover_neighbor_packet_template,
1885 hi = vnet_get_sup_hw_interface (vnm, sw_if_index);
1887 /* Destination address is a solicited node multicast address. We need to fill in
1888 the low 24 bits with low 24 bits of target's address. */
1889 h->ip.dst_address.as_u8[13] = dst->as_u8[13];
1890 h->ip.dst_address.as_u8[14] = dst->as_u8[14];
1891 h->ip.dst_address.as_u8[15] = dst->as_u8[15];
1893 h->ip.src_address = src[0];
1894 h->neighbor.target_address = dst[0];
1896 clib_memcpy (h->link_layer_option.ethernet_address, hi->hw_address,
1897 vec_len (hi->hw_address));
1899 h->neighbor.icmp.checksum =
1900 ip6_tcp_udp_icmp_compute_checksum (vm, 0, &h->ip, &bogus_length);
1901 ASSERT (bogus_length == 0);
1903 b = vlib_get_buffer (vm, bi);
1904 vnet_buffer (b)->sw_if_index[VLIB_RX] =
1905 vnet_buffer (b)->sw_if_index[VLIB_TX] = sw_if_index;
1907 /* Add encapsulation string for software interface (e.g. ethernet header). */
1908 adj = adj_get (ia->neighbor_probe_adj_index);
1909 vnet_rewrite_one_header (adj[0], h, sizeof (ethernet_header_t));
1910 vlib_buffer_advance (b, -adj->rewrite_header.data_bytes);
1913 vlib_frame_t *f = vlib_get_frame_to_node (vm, hi->output_node_index);
1914 u32 *to_next = vlib_frame_vector_args (f);
1917 vlib_put_frame_to_node (vm, hi->output_node_index, f);
1920 return /* no error */ 0;
1925 IP6_REWRITE_NEXT_DROP,
1926 IP6_REWRITE_NEXT_ICMP_ERROR,
1927 } ip6_rewrite_next_t;
1930 ip6_rewrite_inline (vlib_main_t * vm,
1931 vlib_node_runtime_t * node,
1932 vlib_frame_t * frame,
1933 int do_counters, int is_midchain, int is_mcast)
1935 ip_lookup_main_t *lm = &ip6_main.lookup_main;
1936 u32 *from = vlib_frame_vector_args (frame);
1937 u32 n_left_from, n_left_to_next, *to_next, next_index;
1938 vlib_node_runtime_t *error_node =
1939 vlib_node_get_runtime (vm, ip6_input_node.index);
1941 n_left_from = frame->n_vectors;
1942 next_index = node->cached_next_index;
1943 u32 thread_index = vlib_get_thread_index ();
1945 while (n_left_from > 0)
1947 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1949 while (n_left_from >= 4 && n_left_to_next >= 2)
1951 ip_adjacency_t *adj0, *adj1;
1952 vlib_buffer_t *p0, *p1;
1953 ip6_header_t *ip0, *ip1;
1954 u32 pi0, rw_len0, next0, error0, adj_index0;
1955 u32 pi1, rw_len1, next1, error1, adj_index1;
1956 u32 tx_sw_if_index0, tx_sw_if_index1;
1958 /* Prefetch next iteration. */
1960 vlib_buffer_t *p2, *p3;
1962 p2 = vlib_get_buffer (vm, from[2]);
1963 p3 = vlib_get_buffer (vm, from[3]);
1965 vlib_prefetch_buffer_header (p2, LOAD);
1966 vlib_prefetch_buffer_header (p3, LOAD);
1968 CLIB_PREFETCH (p2->pre_data, 32, STORE);
1969 CLIB_PREFETCH (p3->pre_data, 32, STORE);
1971 CLIB_PREFETCH (p2->data, sizeof (ip0[0]), STORE);
1972 CLIB_PREFETCH (p3->data, sizeof (ip0[0]), STORE);
1975 pi0 = to_next[0] = from[0];
1976 pi1 = to_next[1] = from[1];
1981 n_left_to_next -= 2;
1983 p0 = vlib_get_buffer (vm, pi0);
1984 p1 = vlib_get_buffer (vm, pi1);
1986 adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
1987 adj_index1 = vnet_buffer (p1)->ip.adj_index[VLIB_TX];
1989 ip0 = vlib_buffer_get_current (p0);
1990 ip1 = vlib_buffer_get_current (p1);
1992 error0 = error1 = IP6_ERROR_NONE;
1993 next0 = next1 = IP6_REWRITE_NEXT_DROP;
1995 if (PREDICT_TRUE (!(p0->flags & VNET_BUFFER_LOCALLY_ORIGINATED)))
1997 i32 hop_limit0 = ip0->hop_limit;
1999 /* Input node should have reject packets with hop limit 0. */
2000 ASSERT (ip0->hop_limit > 0);
2004 ip0->hop_limit = hop_limit0;
2007 * If the hop count drops below 1 when forwarding, generate
2010 if (PREDICT_FALSE (hop_limit0 <= 0))
2012 error0 = IP6_ERROR_TIME_EXPIRED;
2013 next0 = IP6_REWRITE_NEXT_ICMP_ERROR;
2014 vnet_buffer (p0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
2015 icmp6_error_set_vnet_buffer (p0, ICMP6_time_exceeded,
2016 ICMP6_time_exceeded_ttl_exceeded_in_transit,
2022 p0->flags &= ~VNET_BUFFER_LOCALLY_ORIGINATED;
2024 if (PREDICT_TRUE (!(p1->flags & VNET_BUFFER_LOCALLY_ORIGINATED)))
2026 i32 hop_limit1 = ip1->hop_limit;
2028 /* Input node should have reject packets with hop limit 0. */
2029 ASSERT (ip1->hop_limit > 0);
2033 ip1->hop_limit = hop_limit1;
2036 * If the hop count drops below 1 when forwarding, generate
2039 if (PREDICT_FALSE (hop_limit1 <= 0))
2041 error1 = IP6_ERROR_TIME_EXPIRED;
2042 next1 = IP6_REWRITE_NEXT_ICMP_ERROR;
2043 vnet_buffer (p1)->sw_if_index[VLIB_TX] = (u32) ~ 0;
2044 icmp6_error_set_vnet_buffer (p1, ICMP6_time_exceeded,
2045 ICMP6_time_exceeded_ttl_exceeded_in_transit,
2051 p1->flags &= ~VNET_BUFFER_LOCALLY_ORIGINATED;
2053 adj0 = adj_get (adj_index0);
2054 adj1 = adj_get (adj_index1);
2056 rw_len0 = adj0[0].rewrite_header.data_bytes;
2057 rw_len1 = adj1[0].rewrite_header.data_bytes;
2058 vnet_buffer (p0)->ip.save_rewrite_length = rw_len0;
2059 vnet_buffer (p1)->ip.save_rewrite_length = rw_len1;
2063 vlib_increment_combined_counter
2064 (&adjacency_counters,
2065 thread_index, adj_index0, 1,
2066 vlib_buffer_length_in_chain (vm, p0) + rw_len0);
2067 vlib_increment_combined_counter
2068 (&adjacency_counters,
2069 thread_index, adj_index1, 1,
2070 vlib_buffer_length_in_chain (vm, p1) + rw_len1);
2073 /* Check MTU of outgoing interface. */
2075 (vlib_buffer_length_in_chain (vm, p0) >
2077 rewrite_header.max_l3_packet_bytes ? IP6_ERROR_MTU_EXCEEDED :
2080 (vlib_buffer_length_in_chain (vm, p1) >
2082 rewrite_header.max_l3_packet_bytes ? IP6_ERROR_MTU_EXCEEDED :
2085 /* Don't adjust the buffer for hop count issue; icmp-error node
2086 * wants to see the IP headerr */
2087 if (PREDICT_TRUE (error0 == IP6_ERROR_NONE))
2089 p0->current_data -= rw_len0;
2090 p0->current_length += rw_len0;
2092 tx_sw_if_index0 = adj0[0].rewrite_header.sw_if_index;
2093 vnet_buffer (p0)->sw_if_index[VLIB_TX] = tx_sw_if_index0;
2094 next0 = adj0[0].rewrite_header.next_index;
2097 (adj0[0].rewrite_header.flags & VNET_REWRITE_HAS_FEATURES))
2098 vnet_feature_arc_start (lm->output_feature_arc_index,
2099 tx_sw_if_index0, &next0, p0);
2101 if (PREDICT_TRUE (error1 == IP6_ERROR_NONE))
2103 p1->current_data -= rw_len1;
2104 p1->current_length += rw_len1;
2106 tx_sw_if_index1 = adj1[0].rewrite_header.sw_if_index;
2107 vnet_buffer (p1)->sw_if_index[VLIB_TX] = tx_sw_if_index1;
2108 next1 = adj1[0].rewrite_header.next_index;
2111 (adj1[0].rewrite_header.flags & VNET_REWRITE_HAS_FEATURES))
2112 vnet_feature_arc_start (lm->output_feature_arc_index,
2113 tx_sw_if_index1, &next1, p1);
2116 /* Guess we are only writing on simple Ethernet header. */
2117 vnet_rewrite_two_headers (adj0[0], adj1[0],
2118 ip0, ip1, sizeof (ethernet_header_t));
2122 adj0->sub_type.midchain.fixup_func (vm, adj0, p0);
2123 adj1->sub_type.midchain.fixup_func (vm, adj1, p1);
2128 * copy bytes from the IP address into the MAC rewrite
2130 vnet_fixup_one_header (adj0[0], &ip0->dst_address, ip0);
2131 vnet_fixup_one_header (adj1[0], &ip1->dst_address, ip1);
2134 vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
2135 to_next, n_left_to_next,
2136 pi0, pi1, next0, next1);
2139 while (n_left_from > 0 && n_left_to_next > 0)
2141 ip_adjacency_t *adj0;
2145 u32 adj_index0, next0, error0;
2146 u32 tx_sw_if_index0;
2148 pi0 = to_next[0] = from[0];
2150 p0 = vlib_get_buffer (vm, pi0);
2152 adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
2154 adj0 = adj_get (adj_index0);
2156 ip0 = vlib_buffer_get_current (p0);
2158 error0 = IP6_ERROR_NONE;
2159 next0 = IP6_REWRITE_NEXT_DROP;
2161 /* Check hop limit */
2162 if (PREDICT_TRUE (!(p0->flags & VNET_BUFFER_LOCALLY_ORIGINATED)))
2164 i32 hop_limit0 = ip0->hop_limit;
2166 ASSERT (ip0->hop_limit > 0);
2170 ip0->hop_limit = hop_limit0;
2172 if (PREDICT_FALSE (hop_limit0 <= 0))
2175 * If the hop count drops below 1 when forwarding, generate
2178 error0 = IP6_ERROR_TIME_EXPIRED;
2179 next0 = IP6_REWRITE_NEXT_ICMP_ERROR;
2180 vnet_buffer (p0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
2181 icmp6_error_set_vnet_buffer (p0, ICMP6_time_exceeded,
2182 ICMP6_time_exceeded_ttl_exceeded_in_transit,
2188 p0->flags &= ~VNET_BUFFER_LOCALLY_ORIGINATED;
2191 /* Guess we are only writing on simple Ethernet header. */
2192 vnet_rewrite_one_header (adj0[0], ip0, sizeof (ethernet_header_t));
2194 /* Update packet buffer attributes/set output interface. */
2195 rw_len0 = adj0[0].rewrite_header.data_bytes;
2196 vnet_buffer (p0)->ip.save_rewrite_length = rw_len0;
2200 vlib_increment_combined_counter
2201 (&adjacency_counters,
2202 thread_index, adj_index0, 1,
2203 vlib_buffer_length_in_chain (vm, p0) + rw_len0);
2206 /* Check MTU of outgoing interface. */
2208 (vlib_buffer_length_in_chain (vm, p0) >
2210 rewrite_header.max_l3_packet_bytes ? IP6_ERROR_MTU_EXCEEDED :
2213 /* Don't adjust the buffer for hop count issue; icmp-error node
2214 * wants to see the IP headerr */
2215 if (PREDICT_TRUE (error0 == IP6_ERROR_NONE))
2217 p0->current_data -= rw_len0;
2218 p0->current_length += rw_len0;
2220 tx_sw_if_index0 = adj0[0].rewrite_header.sw_if_index;
2222 vnet_buffer (p0)->sw_if_index[VLIB_TX] = tx_sw_if_index0;
2223 next0 = adj0[0].rewrite_header.next_index;
2226 (adj0[0].rewrite_header.flags & VNET_REWRITE_HAS_FEATURES))
2227 vnet_feature_arc_start (lm->output_feature_arc_index,
2228 tx_sw_if_index0, &next0, p0);
2233 adj0->sub_type.midchain.fixup_func (vm, adj0, p0);
2237 vnet_fixup_one_header (adj0[0], &ip0->dst_address, ip0);
2240 p0->error = error_node->errors[error0];
2245 n_left_to_next -= 1;
2247 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
2248 to_next, n_left_to_next,
2252 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2255 /* Need to do trace after rewrites to pick up new packet data. */
2256 if (node->flags & VLIB_NODE_FLAG_TRACE)
2257 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
2259 return frame->n_vectors;
2263 ip6_rewrite (vlib_main_t * vm,
2264 vlib_node_runtime_t * node, vlib_frame_t * frame)
2266 if (adj_are_counters_enabled ())
2267 return ip6_rewrite_inline (vm, node, frame, 1, 0, 0);
2269 return ip6_rewrite_inline (vm, node, frame, 0, 0, 0);
2273 ip6_rewrite_mcast (vlib_main_t * vm,
2274 vlib_node_runtime_t * node, vlib_frame_t * frame)
2276 if (adj_are_counters_enabled ())
2277 return ip6_rewrite_inline (vm, node, frame, 1, 0, 1);
2279 return ip6_rewrite_inline (vm, node, frame, 0, 0, 1);
2283 ip6_midchain (vlib_main_t * vm,
2284 vlib_node_runtime_t * node, vlib_frame_t * frame)
2286 if (adj_are_counters_enabled ())
2287 return ip6_rewrite_inline (vm, node, frame, 1, 1, 0);
2289 return ip6_rewrite_inline (vm, node, frame, 0, 1, 0);
2293 ip6_mcast_midchain (vlib_main_t * vm,
2294 vlib_node_runtime_t * node, vlib_frame_t * frame)
2296 if (adj_are_counters_enabled ())
2297 return ip6_rewrite_inline (vm, node, frame, 1, 1, 1);
2299 return ip6_rewrite_inline (vm, node, frame, 0, 1, 1);
2303 VLIB_REGISTER_NODE (ip6_midchain_node) =
2305 .function = ip6_midchain,
2306 .name = "ip6-midchain",
2307 .vector_size = sizeof (u32),
2308 .format_trace = format_ip6_forward_next_trace,
2309 .sibling_of = "ip6-rewrite",
2313 VLIB_NODE_FUNCTION_MULTIARCH (ip6_midchain_node, ip6_midchain);
2316 VLIB_REGISTER_NODE (ip6_rewrite_node) =
2318 .function = ip6_rewrite,
2319 .name = "ip6-rewrite",
2320 .vector_size = sizeof (u32),
2321 .format_trace = format_ip6_rewrite_trace,
2325 [IP6_REWRITE_NEXT_DROP] = "error-drop",
2326 [IP6_REWRITE_NEXT_ICMP_ERROR] = "ip6-icmp-error",
2331 VLIB_NODE_FUNCTION_MULTIARCH (ip6_rewrite_node, ip6_rewrite);
2334 VLIB_REGISTER_NODE (ip6_rewrite_mcast_node) =
2336 .function = ip6_rewrite_mcast,
2337 .name = "ip6-rewrite-mcast",
2338 .vector_size = sizeof (u32),
2339 .format_trace = format_ip6_rewrite_trace,
2340 .sibling_of = "ip6-rewrite",
2344 VLIB_NODE_FUNCTION_MULTIARCH (ip6_rewrite_mcast_node, ip6_rewrite_mcast);
2347 VLIB_REGISTER_NODE (ip6_mcast_midchain_node, static) =
2349 .function = ip6_mcast_midchain,
2350 .name = "ip6-mcast-midchain",
2351 .vector_size = sizeof (u32),
2352 .format_trace = format_ip6_rewrite_trace,
2353 .sibling_of = "ip6-rewrite",
2357 VLIB_NODE_FUNCTION_MULTIARCH (ip6_mcast_midchain_node, ip6_mcast_midchain);
2360 * Hop-by-Hop handling
2362 ip6_hop_by_hop_main_t ip6_hop_by_hop_main;
2364 #define foreach_ip6_hop_by_hop_error \
2365 _(PROCESSED, "pkts with ip6 hop-by-hop options") \
2366 _(FORMAT, "incorrectly formatted hop-by-hop options") \
2367 _(UNKNOWN_OPTION, "unknown ip6 hop-by-hop options")
2372 #define _(sym,str) IP6_HOP_BY_HOP_ERROR_##sym,
2373 foreach_ip6_hop_by_hop_error
2375 IP6_HOP_BY_HOP_N_ERROR,
2376 } ip6_hop_by_hop_error_t;
2380 * Primary h-b-h handler trace support
2381 * We work pretty hard on the problem for obvious reasons
2387 u8 option_data[256];
2388 } ip6_hop_by_hop_trace_t;
2390 vlib_node_registration_t ip6_hop_by_hop_node;
2392 static char *ip6_hop_by_hop_error_strings[] = {
2393 #define _(sym,string) string,
2394 foreach_ip6_hop_by_hop_error
2399 format_ip6_hop_by_hop_ext_hdr (u8 * s, va_list * args)
2401 ip6_hop_by_hop_header_t *hbh0 = va_arg (*args, ip6_hop_by_hop_header_t *);
2402 int total_len = va_arg (*args, int);
2403 ip6_hop_by_hop_option_t *opt0, *limit0;
2404 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2407 s = format (s, "IP6_HOP_BY_HOP: next protocol %d len %d total %d",
2408 hbh0->protocol, (hbh0->length + 1) << 3, total_len);
2410 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2411 limit0 = (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 + total_len);
2413 while (opt0 < limit0)
2418 case 0: /* Pad, just stop */
2419 opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0 + 1);
2423 if (hm->trace[type0])
2425 s = (*hm->trace[type0]) (s, opt0);
2430 format (s, "\n unrecognized option %d length %d", type0,
2434 (ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length +
2435 sizeof (ip6_hop_by_hop_option_t));
2443 format_ip6_hop_by_hop_trace (u8 * s, va_list * args)
2445 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
2446 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
2447 ip6_hop_by_hop_trace_t *t = va_arg (*args, ip6_hop_by_hop_trace_t *);
2448 ip6_hop_by_hop_header_t *hbh0;
2449 ip6_hop_by_hop_option_t *opt0, *limit0;
2450 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2454 hbh0 = (ip6_hop_by_hop_header_t *) t->option_data;
2456 s = format (s, "IP6_HOP_BY_HOP: next index %d len %d traced %d",
2457 t->next_index, (hbh0->length + 1) << 3, t->trace_len);
2459 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2460 limit0 = (ip6_hop_by_hop_option_t *) ((u8 *) hbh0) + t->trace_len;
2462 while (opt0 < limit0)
2467 case 0: /* Pad, just stop */
2468 opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0) + 1;
2472 if (hm->trace[type0])
2474 s = (*hm->trace[type0]) (s, opt0);
2479 format (s, "\n unrecognized option %d length %d", type0,
2483 (ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length +
2484 sizeof (ip6_hop_by_hop_option_t));
2492 ip6_scan_hbh_options (vlib_buffer_t * b0,
2494 ip6_hop_by_hop_header_t * hbh0,
2495 ip6_hop_by_hop_option_t * opt0,
2496 ip6_hop_by_hop_option_t * limit0, u32 * next0)
2498 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2502 while (opt0 < limit0)
2508 opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0) + 1;
2513 if (hm->options[type0])
2515 if ((*hm->options[type0]) (b0, ip0, opt0) < 0)
2517 error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2523 /* Unrecognized mandatory option, check the two high order bits */
2524 switch (opt0->type & HBH_OPTION_TYPE_HIGH_ORDER_BITS)
2526 case HBH_OPTION_TYPE_SKIP_UNKNOWN:
2528 case HBH_OPTION_TYPE_DISCARD_UNKNOWN:
2529 error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2530 *next0 = IP_LOOKUP_NEXT_DROP;
2532 case HBH_OPTION_TYPE_DISCARD_UNKNOWN_ICMP:
2533 error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2534 *next0 = IP_LOOKUP_NEXT_ICMP_ERROR;
2535 icmp6_error_set_vnet_buffer (b0, ICMP6_parameter_problem,
2536 ICMP6_parameter_problem_unrecognized_option,
2537 (u8 *) opt0 - (u8 *) ip0);
2539 case HBH_OPTION_TYPE_DISCARD_UNKNOWN_ICMP_NOT_MCAST:
2540 error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2541 if (!ip6_address_is_multicast (&ip0->dst_address))
2543 *next0 = IP_LOOKUP_NEXT_ICMP_ERROR;
2544 icmp6_error_set_vnet_buffer (b0,
2545 ICMP6_parameter_problem,
2546 ICMP6_parameter_problem_unrecognized_option,
2547 (u8 *) opt0 - (u8 *) ip0);
2551 *next0 = IP_LOOKUP_NEXT_DROP;
2559 (ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length +
2560 sizeof (ip6_hop_by_hop_option_t));
2566 * Process the Hop-by-Hop Options header
2569 ip6_hop_by_hop (vlib_main_t * vm,
2570 vlib_node_runtime_t * node, vlib_frame_t * frame)
2572 vlib_node_runtime_t *error_node =
2573 vlib_node_get_runtime (vm, ip6_hop_by_hop_node.index);
2574 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2575 u32 n_left_from, *from, *to_next;
2576 ip_lookup_next_t next_index;
2578 from = vlib_frame_vector_args (frame);
2579 n_left_from = frame->n_vectors;
2580 next_index = node->cached_next_index;
2582 while (n_left_from > 0)
2586 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
2588 while (n_left_from >= 4 && n_left_to_next >= 2)
2591 vlib_buffer_t *b0, *b1;
2593 ip6_header_t *ip0, *ip1;
2594 ip6_hop_by_hop_header_t *hbh0, *hbh1;
2595 ip6_hop_by_hop_option_t *opt0, *limit0, *opt1, *limit1;
2596 u8 error0 = 0, error1 = 0;
2598 /* Prefetch next iteration. */
2600 vlib_buffer_t *p2, *p3;
2602 p2 = vlib_get_buffer (vm, from[2]);
2603 p3 = vlib_get_buffer (vm, from[3]);
2605 vlib_prefetch_buffer_header (p2, LOAD);
2606 vlib_prefetch_buffer_header (p3, LOAD);
2608 CLIB_PREFETCH (p2->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
2609 CLIB_PREFETCH (p3->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
2612 /* Speculatively enqueue b0, b1 to the current next frame */
2613 to_next[0] = bi0 = from[0];
2614 to_next[1] = bi1 = from[1];
2618 n_left_to_next -= 2;
2620 b0 = vlib_get_buffer (vm, bi0);
2621 b1 = vlib_get_buffer (vm, bi1);
2623 /* Default use the next_index from the adjacency. A HBH option rarely redirects to a different node */
2624 u32 adj_index0 = vnet_buffer (b0)->ip.adj_index[VLIB_TX];
2625 ip_adjacency_t *adj0 = adj_get (adj_index0);
2626 u32 adj_index1 = vnet_buffer (b1)->ip.adj_index[VLIB_TX];
2627 ip_adjacency_t *adj1 = adj_get (adj_index1);
2629 /* Default use the next_index from the adjacency. A HBH option rarely redirects to a different node */
2630 next0 = adj0->lookup_next_index;
2631 next1 = adj1->lookup_next_index;
2633 ip0 = vlib_buffer_get_current (b0);
2634 ip1 = vlib_buffer_get_current (b1);
2635 hbh0 = (ip6_hop_by_hop_header_t *) (ip0 + 1);
2636 hbh1 = (ip6_hop_by_hop_header_t *) (ip1 + 1);
2637 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2638 opt1 = (ip6_hop_by_hop_option_t *) (hbh1 + 1);
2640 (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 +
2641 ((hbh0->length + 1) << 3));
2643 (ip6_hop_by_hop_option_t *) ((u8 *) hbh1 +
2644 ((hbh1->length + 1) << 3));
2647 * Basic validity checks
2649 if ((hbh0->length + 1) << 3 >
2650 clib_net_to_host_u16 (ip0->payload_length))
2652 error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2653 next0 = IP_LOOKUP_NEXT_DROP;
2656 /* Scan the set of h-b-h options, process ones that we understand */
2657 error0 = ip6_scan_hbh_options (b0, ip0, hbh0, opt0, limit0, &next0);
2659 if ((hbh1->length + 1) << 3 >
2660 clib_net_to_host_u16 (ip1->payload_length))
2662 error1 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2663 next1 = IP_LOOKUP_NEXT_DROP;
2666 /* Scan the set of h-b-h options, process ones that we understand */
2667 error1 = ip6_scan_hbh_options (b1, ip1, hbh1, opt1, limit1, &next1);
2670 /* Has the classifier flagged this buffer for special treatment? */
2673 && (vnet_buffer (b0)->l2_classify.opaque_index & OI_DECAP)))
2674 next0 = hm->next_override;
2676 /* Has the classifier flagged this buffer for special treatment? */
2679 && (vnet_buffer (b1)->l2_classify.opaque_index & OI_DECAP)))
2680 next1 = hm->next_override;
2682 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)))
2684 if (b0->flags & VLIB_BUFFER_IS_TRACED)
2686 ip6_hop_by_hop_trace_t *t =
2687 vlib_add_trace (vm, node, b0, sizeof (*t));
2688 u32 trace_len = (hbh0->length + 1) << 3;
2689 t->next_index = next0;
2690 /* Capture the h-b-h option verbatim */
2693 ARRAY_LEN (t->option_data) ? trace_len :
2694 ARRAY_LEN (t->option_data);
2695 t->trace_len = trace_len;
2696 clib_memcpy (t->option_data, hbh0, trace_len);
2698 if (b1->flags & VLIB_BUFFER_IS_TRACED)
2700 ip6_hop_by_hop_trace_t *t =
2701 vlib_add_trace (vm, node, b1, sizeof (*t));
2702 u32 trace_len = (hbh1->length + 1) << 3;
2703 t->next_index = next1;
2704 /* Capture the h-b-h option verbatim */
2707 ARRAY_LEN (t->option_data) ? trace_len :
2708 ARRAY_LEN (t->option_data);
2709 t->trace_len = trace_len;
2710 clib_memcpy (t->option_data, hbh1, trace_len);
2715 b0->error = error_node->errors[error0];
2716 b1->error = error_node->errors[error1];
2718 /* verify speculative enqueue, maybe switch current next frame */
2719 vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
2720 n_left_to_next, bi0, bi1, next0,
2724 while (n_left_from > 0 && n_left_to_next > 0)
2730 ip6_hop_by_hop_header_t *hbh0;
2731 ip6_hop_by_hop_option_t *opt0, *limit0;
2734 /* Speculatively enqueue b0 to the current next frame */
2740 n_left_to_next -= 1;
2742 b0 = vlib_get_buffer (vm, bi0);
2744 * Default use the next_index from the adjacency.
2745 * A HBH option rarely redirects to a different node
2747 u32 adj_index0 = vnet_buffer (b0)->ip.adj_index[VLIB_TX];
2748 ip_adjacency_t *adj0 = adj_get (adj_index0);
2749 next0 = adj0->lookup_next_index;
2751 ip0 = vlib_buffer_get_current (b0);
2752 hbh0 = (ip6_hop_by_hop_header_t *) (ip0 + 1);
2753 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2755 (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 +
2756 ((hbh0->length + 1) << 3));
2759 * Basic validity checks
2761 if ((hbh0->length + 1) << 3 >
2762 clib_net_to_host_u16 (ip0->payload_length))
2764 error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2765 next0 = IP_LOOKUP_NEXT_DROP;
2769 /* Scan the set of h-b-h options, process ones that we understand */
2770 error0 = ip6_scan_hbh_options (b0, ip0, hbh0, opt0, limit0, &next0);
2773 /* Has the classifier flagged this buffer for special treatment? */
2776 && (vnet_buffer (b0)->l2_classify.opaque_index & OI_DECAP)))
2777 next0 = hm->next_override;
2779 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
2781 ip6_hop_by_hop_trace_t *t =
2782 vlib_add_trace (vm, node, b0, sizeof (*t));
2783 u32 trace_len = (hbh0->length + 1) << 3;
2784 t->next_index = next0;
2785 /* Capture the h-b-h option verbatim */
2788 ARRAY_LEN (t->option_data) ? trace_len :
2789 ARRAY_LEN (t->option_data);
2790 t->trace_len = trace_len;
2791 clib_memcpy (t->option_data, hbh0, trace_len);
2794 b0->error = error_node->errors[error0];
2796 /* verify speculative enqueue, maybe switch current next frame */
2797 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
2798 n_left_to_next, bi0, next0);
2800 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2802 return frame->n_vectors;
2806 VLIB_REGISTER_NODE (ip6_hop_by_hop_node) =
2808 .function = ip6_hop_by_hop,
2809 .name = "ip6-hop-by-hop",
2810 .sibling_of = "ip6-lookup",
2811 .vector_size = sizeof (u32),
2812 .format_trace = format_ip6_hop_by_hop_trace,
2813 .type = VLIB_NODE_TYPE_INTERNAL,
2814 .n_errors = ARRAY_LEN (ip6_hop_by_hop_error_strings),
2815 .error_strings = ip6_hop_by_hop_error_strings,
2820 VLIB_NODE_FUNCTION_MULTIARCH (ip6_hop_by_hop_node, ip6_hop_by_hop);
2822 static clib_error_t *
2823 ip6_hop_by_hop_init (vlib_main_t * vm)
2825 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2826 memset (hm->options, 0, sizeof (hm->options));
2827 memset (hm->trace, 0, sizeof (hm->trace));
2828 hm->next_override = IP6_LOOKUP_NEXT_POP_HOP_BY_HOP;
2832 VLIB_INIT_FUNCTION (ip6_hop_by_hop_init);
2835 ip6_hbh_set_next_override (uword next)
2837 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2839 hm->next_override = next;
2843 ip6_hbh_register_option (u8 option,
2844 int options (vlib_buffer_t * b, ip6_header_t * ip,
2845 ip6_hop_by_hop_option_t * opt),
2846 u8 * trace (u8 * s, ip6_hop_by_hop_option_t * opt))
2848 ip6_main_t *im = &ip6_main;
2849 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2851 ASSERT (option < ARRAY_LEN (hm->options));
2853 /* Already registered */
2854 if (hm->options[option])
2857 hm->options[option] = options;
2858 hm->trace[option] = trace;
2860 /* Set global variable */
2861 im->hbh_enabled = 1;
2867 ip6_hbh_unregister_option (u8 option)
2869 ip6_main_t *im = &ip6_main;
2870 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2872 ASSERT (option < ARRAY_LEN (hm->options));
2874 /* Not registered */
2875 if (!hm->options[option])
2878 hm->options[option] = NULL;
2879 hm->trace[option] = NULL;
2881 /* Disable global knob if this was the last option configured */
2884 for (i = 0; i < 256; i++)
2886 if (hm->options[option])
2893 im->hbh_enabled = 0;
2898 /* Global IP6 main. */
2899 ip6_main_t ip6_main;
2901 static clib_error_t *
2902 ip6_lookup_init (vlib_main_t * vm)
2904 ip6_main_t *im = &ip6_main;
2905 clib_error_t *error;
2908 if ((error = vlib_call_init_function (vm, vnet_feature_init)))
2911 for (i = 0; i < ARRAY_LEN (im->fib_masks); i++)
2918 for (j = 0; j < i0; j++)
2919 im->fib_masks[i].as_u32[j] = ~0;
2922 im->fib_masks[i].as_u32[i0] =
2923 clib_host_to_net_u32 (pow2_mask (i1) << (32 - i1));
2926 ip_lookup_init (&im->lookup_main, /* is_ip6 */ 1);
2928 if (im->lookup_table_nbuckets == 0)
2929 im->lookup_table_nbuckets = IP6_FIB_DEFAULT_HASH_NUM_BUCKETS;
2931 im->lookup_table_nbuckets = 1 << max_log2 (im->lookup_table_nbuckets);
2933 if (im->lookup_table_size == 0)
2934 im->lookup_table_size = IP6_FIB_DEFAULT_HASH_MEMORY_SIZE;
2936 BV (clib_bihash_init) (&(im->ip6_table[IP6_FIB_TABLE_FWDING].ip6_hash),
2937 "ip6 FIB fwding table",
2938 im->lookup_table_nbuckets, im->lookup_table_size);
2939 BV (clib_bihash_init) (&im->ip6_table[IP6_FIB_TABLE_NON_FWDING].ip6_hash,
2940 "ip6 FIB non-fwding table",
2941 im->lookup_table_nbuckets, im->lookup_table_size);
2943 /* Create FIB with index 0 and table id of 0. */
2944 fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6, 0);
2945 mfib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6, 0);
2949 pn = pg_get_node (ip6_lookup_node.index);
2950 pn->unformat_edit = unformat_pg_ip6_header;
2953 /* Unless explicitly configured, don't process HBH options */
2954 im->hbh_enabled = 0;
2957 icmp6_neighbor_solicitation_header_t p;
2959 memset (&p, 0, sizeof (p));
2961 p.ip.ip_version_traffic_class_and_flow_label =
2962 clib_host_to_net_u32 (0x6 << 28);
2963 p.ip.payload_length =
2964 clib_host_to_net_u16 (sizeof (p) -
2966 (icmp6_neighbor_solicitation_header_t, neighbor));
2967 p.ip.protocol = IP_PROTOCOL_ICMP6;
2968 p.ip.hop_limit = 255;
2969 ip6_set_solicited_node_multicast_address (&p.ip.dst_address, 0);
2971 p.neighbor.icmp.type = ICMP6_neighbor_solicitation;
2973 p.link_layer_option.header.type =
2974 ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address;
2975 p.link_layer_option.header.n_data_u64s =
2976 sizeof (p.link_layer_option) / sizeof (u64);
2978 vlib_packet_template_init (vm,
2979 &im->discover_neighbor_packet_template,
2981 /* alloc chunk size */ 8,
2982 "ip6 neighbor discovery");
2988 VLIB_INIT_FUNCTION (ip6_lookup_init);
2990 static clib_error_t *
2991 add_del_ip6_interface_table (vlib_main_t * vm,
2992 unformat_input_t * input,
2993 vlib_cli_command_t * cmd)
2995 vnet_main_t *vnm = vnet_get_main ();
2996 ip_interface_address_t *ia;
2997 clib_error_t *error = 0;
2998 u32 sw_if_index, table_id;
3002 if (!unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
3004 error = clib_error_return (0, "unknown interface `%U'",
3005 format_unformat_error, input);
3009 if (unformat (input, "%d", &table_id))
3013 error = clib_error_return (0, "expected table id `%U'",
3014 format_unformat_error, input);
3019 * If the interface already has in IP address, then a change int
3020 * VRF is not allowed. The IP address applied must first be removed.
3021 * We do not do that automatically here, since VPP has no knowledge
3022 * of whether thoses subnets are valid in the destination VRF.
3025 foreach_ip_interface_address (&ip6_main.lookup_main,
3027 1 /* honor unnumbered */,
3031 a = ip_interface_address_get_address (&ip6_main.lookup_main, ia);
3032 error = clib_error_return (0, "interface %U has address %U",
3033 format_vnet_sw_if_index_name, vnm,
3035 format_ip6_address, a);
3041 u32 fib_index = fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6,
3044 vec_validate (ip6_main.fib_index_by_sw_if_index, sw_if_index);
3045 ip6_main.fib_index_by_sw_if_index[sw_if_index] = fib_index;
3047 fib_index = mfib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6,
3050 vec_validate (ip6_main.mfib_index_by_sw_if_index, sw_if_index);
3051 ip6_main.mfib_index_by_sw_if_index[sw_if_index] = fib_index;
3060 * Place the indicated interface into the supplied IPv6 FIB table (also known
3061 * as a VRF). If the FIB table does not exist, this command creates it. To
3062 * display the current IPv6 FIB table, use the command '<em>show ip6 fib</em>'.
3063 * FIB table will only be displayed if a route has been added to the table, or
3064 * an IP Address is assigned to an interface in the table (which adds a route
3067 * @note IP addresses added after setting the interface IP table are added to
3068 * the indicated FIB table. If an IP address is added prior to changing the
3069 * table then this is an error. The control plane must remove these addresses
3070 * first and then change the table. VPP will not automatically move the
3071 * addresses from the old to the new table as it does not know the validity
3075 * Example of how to add an interface to an IPv6 FIB table (where 2 is the table-id):
3076 * @cliexcmd{set interface ip6 table GigabitEthernet2/0/0 2}
3079 VLIB_CLI_COMMAND (set_interface_ip6_table_command, static) =
3081 .path = "set interface ip6 table",
3082 .function = add_del_ip6_interface_table,
3083 .short_help = "set interface ip6 table <interface> <table-id>"
3088 ip6_link_local_address_from_ethernet_mac_address (ip6_address_t * ip,
3091 ip->as_u64[0] = clib_host_to_net_u64 (0xFE80000000000000ULL);
3092 /* Invert the "u" bit */
3093 ip->as_u8[8] = mac[0] ^ (1 << 1);
3094 ip->as_u8[9] = mac[1];
3095 ip->as_u8[10] = mac[2];
3096 ip->as_u8[11] = 0xFF;
3097 ip->as_u8[12] = 0xFE;
3098 ip->as_u8[13] = mac[3];
3099 ip->as_u8[14] = mac[4];
3100 ip->as_u8[15] = mac[5];
3104 ip6_ethernet_mac_address_from_link_local_address (u8 * mac,
3107 /* Invert the previously inverted "u" bit */
3108 mac[0] = ip->as_u8[8] ^ (1 << 1);
3109 mac[1] = ip->as_u8[9];
3110 mac[2] = ip->as_u8[10];
3111 mac[3] = ip->as_u8[13];
3112 mac[4] = ip->as_u8[14];
3113 mac[5] = ip->as_u8[15];
3116 static clib_error_t *
3117 test_ip6_link_command_fn (vlib_main_t * vm,
3118 unformat_input_t * input, vlib_cli_command_t * cmd)
3121 ip6_address_t _a, *a = &_a;
3123 if (unformat (input, "%U", unformat_ethernet_address, mac))
3125 ip6_link_local_address_from_ethernet_mac_address (a, mac);
3126 vlib_cli_output (vm, "Link local address: %U", format_ip6_address, a);
3127 ip6_ethernet_mac_address_from_link_local_address (mac, a);
3128 vlib_cli_output (vm, "Original MAC address: %U",
3129 format_ethernet_address, mac);
3136 * This command converts the given MAC Address into an IPv6 link-local
3140 * Example of how to create an IPv6 link-local address:
3141 * @cliexstart{test ip6 link 16:d9:e0:91:79:86}
3142 * Link local address: fe80::14d9:e0ff:fe91:7986
3143 * Original MAC address: 16:d9:e0:91:79:86
3147 VLIB_CLI_COMMAND (test_link_command, static) =
3149 .path = "test ip6 link",
3150 .function = test_ip6_link_command_fn,
3151 .short_help = "test ip6 link <mac-address>",
3156 vnet_set_ip6_flow_hash (u32 table_id, u32 flow_hash_config)
3160 fib_index = fib_table_find (FIB_PROTOCOL_IP6, table_id);
3162 if (~0 == fib_index)
3163 return VNET_API_ERROR_NO_SUCH_FIB;
3165 fib_table_set_flow_hash_config (fib_index, FIB_PROTOCOL_IP6,
3171 static clib_error_t *
3172 set_ip6_flow_hash_command_fn (vlib_main_t * vm,
3173 unformat_input_t * input,
3174 vlib_cli_command_t * cmd)
3178 u32 flow_hash_config = 0;
3181 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
3183 if (unformat (input, "table %d", &table_id))
3186 else if (unformat (input, #a)) { flow_hash_config |= v; matched=1;}
3187 foreach_flow_hash_bit
3194 return clib_error_return (0, "unknown input `%U'",
3195 format_unformat_error, input);
3197 rv = vnet_set_ip6_flow_hash (table_id, flow_hash_config);
3204 return clib_error_return (0, "no such FIB table %d", table_id);
3207 clib_warning ("BUG: illegal flow hash config 0x%x", flow_hash_config);
3215 * Configure the set of IPv6 fields used by the flow hash.
3219 * Example of how to set the flow hash on a given table:
3220 * @cliexcmd{set ip6 flow-hash table 8 dst sport dport proto}
3222 * Example of display the configured flow hash:
3223 * @cliexstart{show ip6 fib}
3224 * ipv6-VRF:0, fib_index 0, flow hash: src dst sport dport proto
3227 * [@0]: dpo-load-balance: [index:5 buckets:1 uRPF:5 to:[0:0]]
3228 * [0] [@0]: dpo-drop ip6
3231 * [@0]: dpo-load-balance: [index:10 buckets:1 uRPF:10 to:[0:0]]
3232 * [0] [@2]: dpo-receive
3235 * [@0]: dpo-load-balance: [index:8 buckets:1 uRPF:8 to:[0:0]]
3236 * [0] [@2]: dpo-receive
3239 * [@0]: dpo-load-balance: [index:7 buckets:1 uRPF:7 to:[0:0]]
3240 * [0] [@2]: dpo-receive
3243 * [@0]: dpo-load-balance: [index:9 buckets:1 uRPF:9 to:[0:0]]
3244 * [0] [@2]: dpo-receive
3245 * ff02::1:ff00:0/104
3247 * [@0]: dpo-load-balance: [index:6 buckets:1 uRPF:6 to:[0:0]]
3248 * [0] [@2]: dpo-receive
3249 * ipv6-VRF:8, fib_index 1, flow hash: dst sport dport proto
3252 * [@0]: dpo-load-balance: [index:21 buckets:1 uRPF:20 to:[0:0]]
3253 * [0] [@0]: dpo-drop ip6
3256 * [@0]: dpo-load-balance: [index:27 buckets:1 uRPF:26 to:[0:0]]
3257 * [0] [@4]: ipv6-glean: af_packet0
3260 * [@0]: dpo-load-balance: [index:28 buckets:1 uRPF:27 to:[0:0]]
3261 * [0] [@2]: dpo-receive: @::a:1:1:0:7 on af_packet0
3264 * [@0]: dpo-load-balance: [index:26 buckets:1 uRPF:25 to:[0:0]]
3265 * [0] [@2]: dpo-receive
3266 * fe80::fe:3eff:fe3e:9222/128
3268 * [@0]: dpo-load-balance: [index:29 buckets:1 uRPF:28 to:[0:0]]
3269 * [0] [@2]: dpo-receive: fe80::fe:3eff:fe3e:9222 on af_packet0
3272 * [@0]: dpo-load-balance: [index:24 buckets:1 uRPF:23 to:[0:0]]
3273 * [0] [@2]: dpo-receive
3276 * [@0]: dpo-load-balance: [index:23 buckets:1 uRPF:22 to:[0:0]]
3277 * [0] [@2]: dpo-receive
3280 * [@0]: dpo-load-balance: [index:25 buckets:1 uRPF:24 to:[0:0]]
3281 * [0] [@2]: dpo-receive
3282 * ff02::1:ff00:0/104
3284 * [@0]: dpo-load-balance: [index:22 buckets:1 uRPF:21 to:[0:0]]
3285 * [0] [@2]: dpo-receive
3290 VLIB_CLI_COMMAND (set_ip6_flow_hash_command, static) =
3292 .path = "set ip6 flow-hash",
3294 "set ip6 flow-hash table <table-id> [src] [dst] [sport] [dport] [proto] [reverse]",
3295 .function = set_ip6_flow_hash_command_fn,
3299 static clib_error_t *
3300 show_ip6_local_command_fn (vlib_main_t * vm,
3301 unformat_input_t * input, vlib_cli_command_t * cmd)
3303 ip6_main_t *im = &ip6_main;
3304 ip_lookup_main_t *lm = &im->lookup_main;
3307 vlib_cli_output (vm, "Protocols handled by ip6_local");
3308 for (i = 0; i < ARRAY_LEN (lm->local_next_by_ip_protocol); i++)
3310 if (lm->local_next_by_ip_protocol[i] != IP_LOCAL_NEXT_PUNT)
3311 vlib_cli_output (vm, "%d", i);
3319 * Display the set of protocols handled by the local IPv6 stack.
3322 * Example of how to display local protocol table:
3323 * @cliexstart{show ip6 local}
3324 * Protocols handled by ip6_local
3332 VLIB_CLI_COMMAND (show_ip6_local, static) =
3334 .path = "show ip6 local",
3335 .function = show_ip6_local_command_fn,
3336 .short_help = "show ip6 local",
3341 vnet_set_ip6_classify_intfc (vlib_main_t * vm, u32 sw_if_index,
3344 vnet_main_t *vnm = vnet_get_main ();
3345 vnet_interface_main_t *im = &vnm->interface_main;
3346 ip6_main_t *ipm = &ip6_main;
3347 ip_lookup_main_t *lm = &ipm->lookup_main;
3348 vnet_classify_main_t *cm = &vnet_classify_main;
3349 ip6_address_t *if_addr;
3351 if (pool_is_free_index (im->sw_interfaces, sw_if_index))
3352 return VNET_API_ERROR_NO_MATCHING_INTERFACE;
3354 if (table_index != ~0 && pool_is_free_index (cm->tables, table_index))
3355 return VNET_API_ERROR_NO_SUCH_ENTRY;
3357 vec_validate (lm->classify_table_index_by_sw_if_index, sw_if_index);
3358 lm->classify_table_index_by_sw_if_index[sw_if_index] = table_index;
3360 if_addr = ip6_interface_first_address (ipm, sw_if_index);
3362 if (NULL != if_addr)
3364 fib_prefix_t pfx = {
3366 .fp_proto = FIB_PROTOCOL_IP6,
3367 .fp_addr.ip6 = *if_addr,
3371 fib_index = fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4,
3375 if (table_index != (u32) ~ 0)
3377 dpo_id_t dpo = DPO_INVALID;
3382 classify_dpo_create (DPO_PROTO_IP6, table_index));
3384 fib_table_entry_special_dpo_add (fib_index,
3386 FIB_SOURCE_CLASSIFY,
3387 FIB_ENTRY_FLAG_NONE, &dpo);
3392 fib_table_entry_special_remove (fib_index,
3393 &pfx, FIB_SOURCE_CLASSIFY);
3400 static clib_error_t *
3401 set_ip6_classify_command_fn (vlib_main_t * vm,
3402 unformat_input_t * input,
3403 vlib_cli_command_t * cmd)
3405 u32 table_index = ~0;
3406 int table_index_set = 0;
3407 u32 sw_if_index = ~0;
3410 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
3412 if (unformat (input, "table-index %d", &table_index))
3413 table_index_set = 1;
3414 else if (unformat (input, "intfc %U", unformat_vnet_sw_interface,
3415 vnet_get_main (), &sw_if_index))
3421 if (table_index_set == 0)
3422 return clib_error_return (0, "classify table-index must be specified");
3424 if (sw_if_index == ~0)
3425 return clib_error_return (0, "interface / subif must be specified");
3427 rv = vnet_set_ip6_classify_intfc (vm, sw_if_index, table_index);
3434 case VNET_API_ERROR_NO_MATCHING_INTERFACE:
3435 return clib_error_return (0, "No such interface");
3437 case VNET_API_ERROR_NO_SUCH_ENTRY:
3438 return clib_error_return (0, "No such classifier table");
3444 * Assign a classification table to an interface. The classification
3445 * table is created using the '<em>classify table</em>' and '<em>classify session</em>'
3446 * commands. Once the table is create, use this command to filter packets
3450 * Example of how to assign a classification table to an interface:
3451 * @cliexcmd{set ip6 classify intfc GigabitEthernet2/0/0 table-index 1}
3454 VLIB_CLI_COMMAND (set_ip6_classify_command, static) =
3456 .path = "set ip6 classify",
3458 "set ip6 classify intfc <interface> table-index <classify-idx>",
3459 .function = set_ip6_classify_command_fn,
3463 static clib_error_t *
3464 ip6_config (vlib_main_t * vm, unformat_input_t * input)
3466 ip6_main_t *im = &ip6_main;
3471 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
3473 if (unformat (input, "hash-buckets %d", &tmp))
3475 else if (unformat (input, "heap-size %dm", &tmp))
3476 heapsize = ((u64) tmp) << 20;
3477 else if (unformat (input, "heap-size %dM", &tmp))
3478 heapsize = ((u64) tmp) << 20;
3479 else if (unformat (input, "heap-size %dg", &tmp))
3480 heapsize = ((u64) tmp) << 30;
3481 else if (unformat (input, "heap-size %dG", &tmp))
3482 heapsize = ((u64) tmp) << 30;
3484 return clib_error_return (0, "unknown input '%U'",
3485 format_unformat_error, input);
3488 im->lookup_table_nbuckets = nbuckets;
3489 im->lookup_table_size = heapsize;
3494 VLIB_EARLY_CONFIG_FUNCTION (ip6_config, "ip6");
3497 * fd.io coding-style-patch-verification: ON
3500 * eval: (c-set-style "gnu")