2 * Copyright (c) 2016 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
16 * ip/ip6_forward.c: IP v6 forwarding
18 * Copyright (c) 2008 Eliot Dresselhaus
20 * Permission is hereby granted, free of charge, to any person obtaining
21 * a copy of this software and associated documentation files (the
22 * "Software"), to deal in the Software without restriction, including
23 * without limitation the rights to use, copy, modify, merge, publish,
24 * distribute, sublicense, and/or sell copies of the Software, and to
25 * permit persons to whom the Software is furnished to do so, subject to
26 * the following conditions:
28 * The above copyright notice and this permission notice shall be
29 * included in all copies or substantial portions of the Software.
31 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
32 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
33 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
34 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
35 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
36 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
37 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
40 #include <vnet/vnet.h>
41 #include <vnet/ip/ip.h>
42 #include <vnet/ip/ip6_neighbor.h>
43 #include <vnet/ethernet/ethernet.h> /* for ethernet_header_t */
44 #include <vnet/srp/srp.h> /* for srp_hw_interface_class */
45 #include <vppinfra/cache.h>
46 #include <vnet/fib/fib_urpf_list.h> /* for FIB uRPF check */
47 #include <vnet/fib/ip6_fib.h>
48 #include <vnet/mfib/ip6_mfib.h>
49 #include <vnet/dpo/load_balance_map.h>
50 #include <vnet/dpo/classify_dpo.h>
52 #include <vppinfra/bihash_template.c>
54 /* Flag used by IOAM code. Classifier sets it pop-hop-by-hop checks it */
55 #define OI_DECAP 0x80000000
59 * @brief IPv6 Forwarding.
61 * This file contains the source code for IPv6 forwarding.
65 ip6_forward_next_trace (vlib_main_t * vm,
66 vlib_node_runtime_t * node,
68 vlib_rx_or_tx_t which_adj_index);
71 ip6_lookup_inline (vlib_main_t * vm,
72 vlib_node_runtime_t * node, vlib_frame_t * frame)
74 ip6_main_t *im = &ip6_main;
75 vlib_combined_counter_main_t *cm = &load_balance_main.lbm_to_counters;
76 u32 n_left_from, n_left_to_next, *from, *to_next;
77 ip_lookup_next_t next;
78 u32 thread_index = vlib_get_thread_index ();
80 from = vlib_frame_vector_args (frame);
81 n_left_from = frame->n_vectors;
82 next = node->cached_next_index;
84 while (n_left_from > 0)
86 vlib_get_next_frame (vm, node, next, to_next, n_left_to_next);
88 while (n_left_from >= 4 && n_left_to_next >= 2)
90 vlib_buffer_t *p0, *p1;
91 u32 pi0, pi1, lbi0, lbi1, wrong_next;
92 ip_lookup_next_t next0, next1;
93 ip6_header_t *ip0, *ip1;
94 ip6_address_t *dst_addr0, *dst_addr1;
95 u32 fib_index0, fib_index1;
96 u32 flow_hash_config0, flow_hash_config1;
97 const dpo_id_t *dpo0, *dpo1;
98 const load_balance_t *lb0, *lb1;
100 /* Prefetch next iteration. */
102 vlib_buffer_t *p2, *p3;
104 p2 = vlib_get_buffer (vm, from[2]);
105 p3 = vlib_get_buffer (vm, from[3]);
107 vlib_prefetch_buffer_header (p2, LOAD);
108 vlib_prefetch_buffer_header (p3, LOAD);
109 CLIB_PREFETCH (p2->data, sizeof (ip0[0]), LOAD);
110 CLIB_PREFETCH (p3->data, sizeof (ip0[0]), LOAD);
113 pi0 = to_next[0] = from[0];
114 pi1 = to_next[1] = from[1];
116 p0 = vlib_get_buffer (vm, pi0);
117 p1 = vlib_get_buffer (vm, pi1);
119 ip0 = vlib_buffer_get_current (p0);
120 ip1 = vlib_buffer_get_current (p1);
122 dst_addr0 = &ip0->dst_address;
123 dst_addr1 = &ip1->dst_address;
126 vec_elt (im->fib_index_by_sw_if_index,
127 vnet_buffer (p0)->sw_if_index[VLIB_RX]);
129 vec_elt (im->fib_index_by_sw_if_index,
130 vnet_buffer (p1)->sw_if_index[VLIB_RX]);
132 fib_index0 = (vnet_buffer (p0)->sw_if_index[VLIB_TX] == (u32) ~ 0) ?
133 fib_index0 : vnet_buffer (p0)->sw_if_index[VLIB_TX];
134 fib_index1 = (vnet_buffer (p1)->sw_if_index[VLIB_TX] == (u32) ~ 0) ?
135 fib_index1 : vnet_buffer (p1)->sw_if_index[VLIB_TX];
137 lbi0 = ip6_fib_table_fwding_lookup (im, fib_index0, dst_addr0);
138 lbi1 = ip6_fib_table_fwding_lookup (im, fib_index1, dst_addr1);
140 lb0 = load_balance_get (lbi0);
141 lb1 = load_balance_get (lbi1);
142 ASSERT (lb0->lb_n_buckets > 0);
143 ASSERT (lb1->lb_n_buckets > 0);
144 ASSERT (is_pow2 (lb0->lb_n_buckets));
145 ASSERT (is_pow2 (lb1->lb_n_buckets));
147 vnet_buffer (p0)->ip.flow_hash = vnet_buffer (p1)->ip.flow_hash = 0;
149 if (PREDICT_FALSE (lb0->lb_n_buckets > 1))
151 flow_hash_config0 = lb0->lb_hash_config;
152 vnet_buffer (p0)->ip.flow_hash =
153 ip6_compute_flow_hash (ip0, flow_hash_config0);
155 load_balance_get_fwd_bucket (lb0,
156 (vnet_buffer (p0)->ip.flow_hash &
157 (lb0->lb_n_buckets_minus_1)));
161 dpo0 = load_balance_get_bucket_i (lb0, 0);
163 if (PREDICT_FALSE (lb1->lb_n_buckets > 1))
165 flow_hash_config1 = lb1->lb_hash_config;
166 vnet_buffer (p1)->ip.flow_hash =
167 ip6_compute_flow_hash (ip1, flow_hash_config1);
169 load_balance_get_fwd_bucket (lb1,
170 (vnet_buffer (p1)->ip.flow_hash &
171 (lb1->lb_n_buckets_minus_1)));
175 dpo1 = load_balance_get_bucket_i (lb1, 0);
177 next0 = dpo0->dpoi_next_node;
178 next1 = dpo1->dpoi_next_node;
180 /* Only process the HBH Option Header if explicitly configured to do so */
182 (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
184 next0 = (dpo_is_adj (dpo0) && im->hbh_enabled) ?
185 (ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next0;
188 (ip1->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
190 next1 = (dpo_is_adj (dpo1) && im->hbh_enabled) ?
191 (ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next1;
193 vnet_buffer (p0)->ip.adj_index[VLIB_TX] = dpo0->dpoi_index;
194 vnet_buffer (p1)->ip.adj_index[VLIB_TX] = dpo1->dpoi_index;
196 vlib_increment_combined_counter
197 (cm, thread_index, lbi0, 1, vlib_buffer_length_in_chain (vm, p0));
198 vlib_increment_combined_counter
199 (cm, thread_index, lbi1, 1, vlib_buffer_length_in_chain (vm, p1));
206 wrong_next = (next0 != next) + 2 * (next1 != next);
207 if (PREDICT_FALSE (wrong_next != 0))
216 vlib_set_next_frame_buffer (vm, node, next0, pi0);
223 vlib_set_next_frame_buffer (vm, node, next1, pi1);
230 vlib_set_next_frame_buffer (vm, node, next0, pi0);
231 vlib_set_next_frame_buffer (vm, node, next1, pi1);
235 vlib_put_next_frame (vm, node, next, n_left_to_next);
237 vlib_get_next_frame (vm, node, next, to_next,
244 while (n_left_from > 0 && n_left_to_next > 0)
249 ip_lookup_next_t next0;
251 ip6_address_t *dst_addr0;
252 u32 fib_index0, flow_hash_config0;
253 const dpo_id_t *dpo0;
258 p0 = vlib_get_buffer (vm, pi0);
260 ip0 = vlib_buffer_get_current (p0);
262 dst_addr0 = &ip0->dst_address;
265 vec_elt (im->fib_index_by_sw_if_index,
266 vnet_buffer (p0)->sw_if_index[VLIB_RX]);
268 (vnet_buffer (p0)->sw_if_index[VLIB_TX] ==
269 (u32) ~ 0) ? fib_index0 : vnet_buffer (p0)->sw_if_index[VLIB_TX];
271 lbi0 = ip6_fib_table_fwding_lookup (im, fib_index0, dst_addr0);
273 lb0 = load_balance_get (lbi0);
274 flow_hash_config0 = lb0->lb_hash_config;
276 vnet_buffer (p0)->ip.flow_hash = 0;
277 ASSERT (lb0->lb_n_buckets > 0);
278 ASSERT (is_pow2 (lb0->lb_n_buckets));
280 if (PREDICT_FALSE (lb0->lb_n_buckets > 1))
282 flow_hash_config0 = lb0->lb_hash_config;
283 vnet_buffer (p0)->ip.flow_hash =
284 ip6_compute_flow_hash (ip0, flow_hash_config0);
286 load_balance_get_fwd_bucket (lb0,
287 (vnet_buffer (p0)->ip.flow_hash &
288 (lb0->lb_n_buckets_minus_1)));
292 dpo0 = load_balance_get_bucket_i (lb0, 0);
295 dpo0 = load_balance_get_bucket_i (lb0,
296 (vnet_buffer (p0)->ip.flow_hash &
297 lb0->lb_n_buckets_minus_1));
298 next0 = dpo0->dpoi_next_node;
300 /* Only process the HBH Option Header if explicitly configured to do so */
302 (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
304 next0 = (dpo_is_adj (dpo0) && im->hbh_enabled) ?
305 (ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next0;
307 vnet_buffer (p0)->ip.adj_index[VLIB_TX] = dpo0->dpoi_index;
309 vlib_increment_combined_counter
310 (cm, thread_index, lbi0, 1, vlib_buffer_length_in_chain (vm, p0));
317 if (PREDICT_FALSE (next0 != next))
320 vlib_put_next_frame (vm, node, next, n_left_to_next);
322 vlib_get_next_frame (vm, node, next, to_next, n_left_to_next);
329 vlib_put_next_frame (vm, node, next, n_left_to_next);
332 if (node->flags & VLIB_NODE_FLAG_TRACE)
333 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
335 return frame->n_vectors;
339 ip6_add_interface_routes (vnet_main_t * vnm, u32 sw_if_index,
340 ip6_main_t * im, u32 fib_index,
341 ip_interface_address_t * a)
343 ip_lookup_main_t *lm = &im->lookup_main;
344 ip6_address_t *address = ip_interface_address_get_address (lm, a);
346 .fp_len = a->address_length,
347 .fp_proto = FIB_PROTOCOL_IP6,
348 .fp_addr.ip6 = *address,
351 if (a->address_length < 128)
353 fib_table_entry_update_one_path (fib_index,
355 FIB_SOURCE_INTERFACE,
356 (FIB_ENTRY_FLAG_CONNECTED |
357 FIB_ENTRY_FLAG_ATTACHED),
359 /* No next-hop address */
361 /* invalid FIB index */
364 NULL, FIB_ROUTE_PATH_FLAG_NONE);
368 if (sw_if_index < vec_len (lm->classify_table_index_by_sw_if_index))
370 u32 classify_table_index =
371 lm->classify_table_index_by_sw_if_index[sw_if_index];
372 if (classify_table_index != (u32) ~ 0)
374 dpo_id_t dpo = DPO_INVALID;
379 classify_dpo_create (DPO_PROTO_IP6, classify_table_index));
381 fib_table_entry_special_dpo_add (fib_index,
384 FIB_ENTRY_FLAG_NONE, &dpo);
389 fib_table_entry_update_one_path (fib_index, &pfx,
390 FIB_SOURCE_INTERFACE,
391 (FIB_ENTRY_FLAG_CONNECTED |
392 FIB_ENTRY_FLAG_LOCAL),
396 1, NULL, FIB_ROUTE_PATH_FLAG_NONE);
400 ip6_del_interface_routes (ip6_main_t * im,
402 ip6_address_t * address, u32 address_length)
405 .fp_len = address_length,
406 .fp_proto = FIB_PROTOCOL_IP6,
407 .fp_addr.ip6 = *address,
410 if (pfx.fp_len < 128)
412 fib_table_entry_delete (fib_index, &pfx, FIB_SOURCE_INTERFACE);
417 fib_table_entry_delete (fib_index, &pfx, FIB_SOURCE_INTERFACE);
421 ip6_sw_interface_enable_disable (u32 sw_if_index, u32 is_enable)
423 ip6_main_t *im = &ip6_main;
425 vec_validate_init_empty (im->ip_enabled_by_sw_if_index, sw_if_index, 0);
428 * enable/disable only on the 1<->0 transition
432 if (1 != ++im->ip_enabled_by_sw_if_index[sw_if_index])
437 /* The ref count is 0 when an address is removed from an interface that has
438 * no address - this is not a ciritical error */
439 if (0 == im->ip_enabled_by_sw_if_index[sw_if_index] ||
440 0 != --im->ip_enabled_by_sw_if_index[sw_if_index])
444 vnet_feature_enable_disable ("ip6-unicast", "ip6-drop", sw_if_index,
447 vnet_feature_enable_disable ("ip6-multicast", "ip6-drop", sw_if_index,
451 /* get first interface address */
453 ip6_interface_first_address (ip6_main_t * im, u32 sw_if_index)
455 ip_lookup_main_t *lm = &im->lookup_main;
456 ip_interface_address_t *ia = 0;
457 ip6_address_t *result = 0;
460 foreach_ip_interface_address (lm, ia, sw_if_index,
461 1 /* honor unnumbered */,
463 ip6_address_t * a = ip_interface_address_get_address (lm, ia);
472 ip6_add_del_interface_address (vlib_main_t * vm,
474 ip6_address_t * address,
475 u32 address_length, u32 is_del)
477 vnet_main_t *vnm = vnet_get_main ();
478 ip6_main_t *im = &ip6_main;
479 ip_lookup_main_t *lm = &im->lookup_main;
481 u32 if_address_index;
482 ip6_address_fib_t ip6_af, *addr_fib = 0;
484 vec_validate (im->fib_index_by_sw_if_index, sw_if_index);
485 vec_validate (im->mfib_index_by_sw_if_index, sw_if_index);
487 ip6_addr_fib_init (&ip6_af, address,
488 vec_elt (im->fib_index_by_sw_if_index, sw_if_index));
489 vec_add1 (addr_fib, ip6_af);
492 uword elts_before = pool_elts (lm->if_address_pool);
494 error = ip_interface_address_add_del
495 (lm, sw_if_index, addr_fib, address_length, is_del, &if_address_index);
499 /* Pool did not grow: add duplicate address. */
500 if (elts_before == pool_elts (lm->if_address_pool))
504 ip6_sw_interface_enable_disable (sw_if_index, !is_del);
507 ip6_del_interface_routes (im, ip6_af.fib_index, address, address_length);
509 ip6_add_interface_routes (vnm, sw_if_index,
510 im, ip6_af.fib_index,
511 pool_elt_at_index (lm->if_address_pool,
515 ip6_add_del_interface_address_callback_t *cb;
516 vec_foreach (cb, im->add_del_interface_address_callbacks)
517 cb->function (im, cb->function_opaque, sw_if_index,
518 address, address_length, if_address_index, is_del);
527 ip6_sw_interface_admin_up_down (vnet_main_t * vnm, u32 sw_if_index, u32 flags)
529 ip6_main_t *im = &ip6_main;
530 ip_interface_address_t *ia;
532 u32 is_admin_up, fib_index;
534 /* Fill in lookup tables with default table (0). */
535 vec_validate (im->fib_index_by_sw_if_index, sw_if_index);
537 vec_validate_init_empty (im->
538 lookup_main.if_address_pool_index_by_sw_if_index,
541 is_admin_up = (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) != 0;
543 fib_index = vec_elt (im->fib_index_by_sw_if_index, sw_if_index);
546 foreach_ip_interface_address (&im->lookup_main, ia, sw_if_index,
547 0 /* honor unnumbered */,
549 a = ip_interface_address_get_address (&im->lookup_main, ia);
551 ip6_add_interface_routes (vnm, sw_if_index,
555 ip6_del_interface_routes (im, fib_index,
556 a, ia->address_length);
563 VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION (ip6_sw_interface_admin_up_down);
565 /* Built-in ip6 unicast rx feature path definition */
567 VNET_FEATURE_ARC_INIT (ip6_unicast, static) =
569 .arc_name = "ip6-unicast",
570 .start_nodes = VNET_FEATURES ("ip6-input"),
571 .arc_index_ptr = &ip6_main.lookup_main.ucast_feature_arc_index,
574 VNET_FEATURE_INIT (ip6_flow_classify, static) =
576 .arc_name = "ip6-unicast",
577 .node_name = "ip6-flow-classify",
578 .runs_before = VNET_FEATURES ("ip6-inacl"),
581 VNET_FEATURE_INIT (ip6_inacl, static) =
583 .arc_name = "ip6-unicast",
584 .node_name = "ip6-inacl",
585 .runs_before = VNET_FEATURES ("ip6-policer-classify"),
588 VNET_FEATURE_INIT (ip6_policer_classify, static) =
590 .arc_name = "ip6-unicast",
591 .node_name = "ip6-policer-classify",
592 .runs_before = VNET_FEATURES ("ipsec-input-ip6"),
595 VNET_FEATURE_INIT (ip6_ipsec, static) =
597 .arc_name = "ip6-unicast",
598 .node_name = "ipsec-input-ip6",
599 .runs_before = VNET_FEATURES ("l2tp-decap"),
602 VNET_FEATURE_INIT (ip6_l2tp, static) =
604 .arc_name = "ip6-unicast",
605 .node_name = "l2tp-decap",
606 .runs_before = VNET_FEATURES ("vpath-input-ip6"),
609 VNET_FEATURE_INIT (ip6_vpath, static) =
611 .arc_name = "ip6-unicast",
612 .node_name = "vpath-input-ip6",
613 .runs_before = VNET_FEATURES ("ip6-vxlan-bypass"),
616 VNET_FEATURE_INIT (ip6_vxlan_bypass, static) =
618 .arc_name = "ip6-unicast",
619 .node_name = "ip6-vxlan-bypass",
620 .runs_before = VNET_FEATURES ("ip6-lookup"),
623 VNET_FEATURE_INIT (ip6_drop, static) =
625 .arc_name = "ip6-unicast",
626 .node_name = "ip6-drop",
627 .runs_before = VNET_FEATURES ("ip6-lookup"),
630 VNET_FEATURE_INIT (ip6_lookup, static) =
632 .arc_name = "ip6-unicast",
633 .node_name = "ip6-lookup",
634 .runs_before = 0, /*last feature*/
637 /* Built-in ip6 multicast rx feature path definition (none now) */
638 VNET_FEATURE_ARC_INIT (ip6_multicast, static) =
640 .arc_name = "ip6-multicast",
641 .start_nodes = VNET_FEATURES ("ip6-input"),
642 .arc_index_ptr = &ip6_main.lookup_main.mcast_feature_arc_index,
645 VNET_FEATURE_INIT (ip6_vpath_mc, static) = {
646 .arc_name = "ip6-multicast",
647 .node_name = "vpath-input-ip6",
648 .runs_before = VNET_FEATURES ("ip6-mfib-forward-lookup"),
651 VNET_FEATURE_INIT (ip6_drop_mc, static) = {
652 .arc_name = "ip6-multicast",
653 .node_name = "ip6-drop",
654 .runs_before = VNET_FEATURES ("ip6-mfib-forward-lookup"),
657 VNET_FEATURE_INIT (ip6_mc_lookup, static) = {
658 .arc_name = "ip6-multicast",
659 .node_name = "ip6-mfib-forward-lookup",
660 .runs_before = 0, /* last feature */
663 /* Built-in ip4 tx feature path definition */
664 VNET_FEATURE_ARC_INIT (ip6_output, static) =
666 .arc_name = "ip6-output",
667 .start_nodes = VNET_FEATURES ("ip6-rewrite", "ip6-midchain"),
668 .arc_index_ptr = &ip6_main.lookup_main.output_feature_arc_index,
671 VNET_FEATURE_INIT (ip6_ipsec_output, static) = {
672 .arc_name = "ip6-output",
673 .node_name = "ipsec-output-ip6",
674 .runs_before = VNET_FEATURES ("interface-output"),
677 VNET_FEATURE_INIT (ip6_interface_output, static) = {
678 .arc_name = "ip6-output",
679 .node_name = "interface-output",
680 .runs_before = 0, /* not before any other features */
685 ip6_sw_interface_add_del (vnet_main_t * vnm, u32 sw_if_index, u32 is_add)
687 ip6_main_t *im = &ip6_main;
689 vec_validate (im->fib_index_by_sw_if_index, sw_if_index);
690 vec_validate (im->mfib_index_by_sw_if_index, sw_if_index);
694 /* Ensure that IPv6 is disabled */
695 ip6_main_t *im6 = &ip6_main;
696 ip_lookup_main_t *lm6 = &im6->lookup_main;
697 ip_interface_address_t *ia = 0;
698 ip6_address_t *address;
699 vlib_main_t *vm = vlib_get_main ();
701 ip6_neighbor_sw_interface_add_del (vnm, sw_if_index, 0 /* is_add */ );
703 foreach_ip_interface_address (lm6, ia, sw_if_index, 1 /* honor unnumbered */,
705 address = ip_interface_address_get_address (lm6, ia);
706 ip6_add_del_interface_address(vm, sw_if_index, address, ia->address_length, 1);
709 ip6_mfib_interface_enable_disable (sw_if_index, 0);
712 vnet_feature_enable_disable ("ip6-unicast", "ip6-drop", sw_if_index,
715 vnet_feature_enable_disable ("ip6-multicast", "ip6-drop", sw_if_index,
718 return /* no error */ 0;
721 VNET_SW_INTERFACE_ADD_DEL_FUNCTION (ip6_sw_interface_add_del);
724 ip6_lookup (vlib_main_t * vm,
725 vlib_node_runtime_t * node, vlib_frame_t * frame)
727 return ip6_lookup_inline (vm, node, frame);
730 static u8 *format_ip6_lookup_trace (u8 * s, va_list * args);
733 VLIB_REGISTER_NODE (ip6_lookup_node) =
735 .function = ip6_lookup,
736 .name = "ip6-lookup",
737 .vector_size = sizeof (u32),
738 .format_trace = format_ip6_lookup_trace,
739 .n_next_nodes = IP6_LOOKUP_N_NEXT,
740 .next_nodes = IP6_LOOKUP_NEXT_NODES,
744 VLIB_NODE_FUNCTION_MULTIARCH (ip6_lookup_node, ip6_lookup);
747 ip6_load_balance (vlib_main_t * vm,
748 vlib_node_runtime_t * node, vlib_frame_t * frame)
750 vlib_combined_counter_main_t *cm = &load_balance_main.lbm_via_counters;
751 u32 n_left_from, n_left_to_next, *from, *to_next;
752 ip_lookup_next_t next;
753 u32 thread_index = vlib_get_thread_index ();
754 ip6_main_t *im = &ip6_main;
756 from = vlib_frame_vector_args (frame);
757 n_left_from = frame->n_vectors;
758 next = node->cached_next_index;
760 if (node->flags & VLIB_NODE_FLAG_TRACE)
761 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
763 while (n_left_from > 0)
765 vlib_get_next_frame (vm, node, next, to_next, n_left_to_next);
768 while (n_left_from >= 4 && n_left_to_next >= 2)
770 ip_lookup_next_t next0, next1;
771 const load_balance_t *lb0, *lb1;
772 vlib_buffer_t *p0, *p1;
773 u32 pi0, lbi0, hc0, pi1, lbi1, hc1;
774 const ip6_header_t *ip0, *ip1;
775 const dpo_id_t *dpo0, *dpo1;
777 /* Prefetch next iteration. */
779 vlib_buffer_t *p2, *p3;
781 p2 = vlib_get_buffer (vm, from[2]);
782 p3 = vlib_get_buffer (vm, from[3]);
784 vlib_prefetch_buffer_header (p2, STORE);
785 vlib_prefetch_buffer_header (p3, STORE);
787 CLIB_PREFETCH (p2->data, sizeof (ip0[0]), STORE);
788 CLIB_PREFETCH (p3->data, sizeof (ip0[0]), STORE);
791 pi0 = to_next[0] = from[0];
792 pi1 = to_next[1] = from[1];
799 p0 = vlib_get_buffer (vm, pi0);
800 p1 = vlib_get_buffer (vm, pi1);
802 ip0 = vlib_buffer_get_current (p0);
803 ip1 = vlib_buffer_get_current (p1);
804 lbi0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
805 lbi1 = vnet_buffer (p1)->ip.adj_index[VLIB_TX];
807 lb0 = load_balance_get (lbi0);
808 lb1 = load_balance_get (lbi1);
811 * this node is for via FIBs we can re-use the hash value from the
812 * to node if present.
813 * We don't want to use the same hash value at each level in the recursion
814 * graph as that would lead to polarisation
818 if (PREDICT_FALSE (lb0->lb_n_buckets > 1))
820 if (PREDICT_TRUE (vnet_buffer (p0)->ip.flow_hash))
822 hc0 = vnet_buffer (p0)->ip.flow_hash =
823 vnet_buffer (p0)->ip.flow_hash >> 1;
827 hc0 = vnet_buffer (p0)->ip.flow_hash =
828 ip6_compute_flow_hash (ip0, lb0->lb_hash_config);
831 load_balance_get_fwd_bucket (lb0,
833 lb0->lb_n_buckets_minus_1));
837 dpo0 = load_balance_get_bucket_i (lb0, 0);
839 if (PREDICT_FALSE (lb1->lb_n_buckets > 1))
841 if (PREDICT_TRUE (vnet_buffer (p1)->ip.flow_hash))
843 hc1 = vnet_buffer (p1)->ip.flow_hash =
844 vnet_buffer (p1)->ip.flow_hash >> 1;
848 hc1 = vnet_buffer (p1)->ip.flow_hash =
849 ip6_compute_flow_hash (ip1, lb1->lb_hash_config);
852 load_balance_get_fwd_bucket (lb1,
854 lb1->lb_n_buckets_minus_1));
858 dpo1 = load_balance_get_bucket_i (lb1, 0);
861 next0 = dpo0->dpoi_next_node;
862 next1 = dpo1->dpoi_next_node;
864 /* Only process the HBH Option Header if explicitly configured to do so */
866 (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
868 next0 = (dpo_is_adj (dpo0) && im->hbh_enabled) ?
869 (ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next0;
871 /* Only process the HBH Option Header if explicitly configured to do so */
873 (ip1->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
875 next1 = (dpo_is_adj (dpo1) && im->hbh_enabled) ?
876 (ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next1;
879 vnet_buffer (p0)->ip.adj_index[VLIB_TX] = dpo0->dpoi_index;
880 vnet_buffer (p1)->ip.adj_index[VLIB_TX] = dpo1->dpoi_index;
882 vlib_increment_combined_counter
883 (cm, thread_index, lbi0, 1, vlib_buffer_length_in_chain (vm, p0));
884 vlib_increment_combined_counter
885 (cm, thread_index, lbi1, 1, vlib_buffer_length_in_chain (vm, p1));
887 vlib_validate_buffer_enqueue_x2 (vm, node, next,
888 to_next, n_left_to_next,
889 pi0, pi1, next0, next1);
892 while (n_left_from > 0 && n_left_to_next > 0)
894 ip_lookup_next_t next0;
895 const load_balance_t *lb0;
898 const ip6_header_t *ip0;
899 const dpo_id_t *dpo0;
908 p0 = vlib_get_buffer (vm, pi0);
910 ip0 = vlib_buffer_get_current (p0);
911 lbi0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
913 lb0 = load_balance_get (lbi0);
916 if (PREDICT_FALSE (lb0->lb_n_buckets > 1))
918 if (PREDICT_TRUE (vnet_buffer (p0)->ip.flow_hash))
920 hc0 = vnet_buffer (p0)->ip.flow_hash =
921 vnet_buffer (p0)->ip.flow_hash >> 1;
925 hc0 = vnet_buffer (p0)->ip.flow_hash =
926 ip6_compute_flow_hash (ip0, lb0->lb_hash_config);
929 load_balance_get_fwd_bucket (lb0,
931 lb0->lb_n_buckets_minus_1));
935 dpo0 = load_balance_get_bucket_i (lb0, 0);
938 next0 = dpo0->dpoi_next_node;
939 vnet_buffer (p0)->ip.adj_index[VLIB_TX] = dpo0->dpoi_index;
941 /* Only process the HBH Option Header if explicitly configured to do so */
943 (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
945 next0 = (dpo_is_adj (dpo0) && im->hbh_enabled) ?
946 (ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next0;
949 vlib_increment_combined_counter
950 (cm, thread_index, lbi0, 1, vlib_buffer_length_in_chain (vm, p0));
952 vlib_validate_buffer_enqueue_x1 (vm, node, next,
953 to_next, n_left_to_next,
957 vlib_put_next_frame (vm, node, next, n_left_to_next);
960 return frame->n_vectors;
964 VLIB_REGISTER_NODE (ip6_load_balance_node) =
966 .function = ip6_load_balance,
967 .name = "ip6-load-balance",
968 .vector_size = sizeof (u32),
969 .sibling_of = "ip6-lookup",
970 .format_trace = format_ip6_lookup_trace,
974 VLIB_NODE_FUNCTION_MULTIARCH (ip6_load_balance_node, ip6_load_balance);
978 /* Adjacency taken. */
983 /* Packet data, possibly *after* rewrite. */
984 u8 packet_data[128 - 1 * sizeof (u32)];
986 ip6_forward_next_trace_t;
989 format_ip6_forward_next_trace (u8 * s, va_list * args)
991 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
992 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
993 ip6_forward_next_trace_t *t = va_arg (*args, ip6_forward_next_trace_t *);
994 uword indent = format_get_indent (s);
996 s = format (s, "%U%U",
997 format_white_space, indent,
998 format_ip6_header, t->packet_data, sizeof (t->packet_data));
1003 format_ip6_lookup_trace (u8 * s, va_list * args)
1005 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
1006 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
1007 ip6_forward_next_trace_t *t = va_arg (*args, ip6_forward_next_trace_t *);
1008 uword indent = format_get_indent (s);
1010 s = format (s, "fib %d dpo-idx %d flow hash: 0x%08x",
1011 t->fib_index, t->adj_index, t->flow_hash);
1012 s = format (s, "\n%U%U",
1013 format_white_space, indent,
1014 format_ip6_header, t->packet_data, sizeof (t->packet_data));
1020 format_ip6_rewrite_trace (u8 * s, va_list * args)
1022 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
1023 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
1024 ip6_forward_next_trace_t *t = va_arg (*args, ip6_forward_next_trace_t *);
1025 uword indent = format_get_indent (s);
1027 s = format (s, "tx_sw_if_index %d adj-idx %d : %U flow hash: 0x%08x",
1028 t->fib_index, t->adj_index, format_ip_adjacency,
1029 t->adj_index, FORMAT_IP_ADJACENCY_NONE, t->flow_hash);
1030 s = format (s, "\n%U%U",
1031 format_white_space, indent,
1032 format_ip_adjacency_packet_data,
1033 t->adj_index, t->packet_data, sizeof (t->packet_data));
1037 /* Common trace function for all ip6-forward next nodes. */
1039 ip6_forward_next_trace (vlib_main_t * vm,
1040 vlib_node_runtime_t * node,
1041 vlib_frame_t * frame, vlib_rx_or_tx_t which_adj_index)
1044 ip6_main_t *im = &ip6_main;
1046 n_left = frame->n_vectors;
1047 from = vlib_frame_vector_args (frame);
1052 vlib_buffer_t *b0, *b1;
1053 ip6_forward_next_trace_t *t0, *t1;
1055 /* Prefetch next iteration. */
1056 vlib_prefetch_buffer_with_index (vm, from[2], LOAD);
1057 vlib_prefetch_buffer_with_index (vm, from[3], LOAD);
1062 b0 = vlib_get_buffer (vm, bi0);
1063 b1 = vlib_get_buffer (vm, bi1);
1065 if (b0->flags & VLIB_BUFFER_IS_TRACED)
1067 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
1068 t0->adj_index = vnet_buffer (b0)->ip.adj_index[which_adj_index];
1069 t0->flow_hash = vnet_buffer (b0)->ip.flow_hash;
1071 (vnet_buffer (b0)->sw_if_index[VLIB_TX] !=
1072 (u32) ~ 0) ? vnet_buffer (b0)->sw_if_index[VLIB_TX] :
1073 vec_elt (im->fib_index_by_sw_if_index,
1074 vnet_buffer (b0)->sw_if_index[VLIB_RX]);
1076 clib_memcpy (t0->packet_data,
1077 vlib_buffer_get_current (b0),
1078 sizeof (t0->packet_data));
1080 if (b1->flags & VLIB_BUFFER_IS_TRACED)
1082 t1 = vlib_add_trace (vm, node, b1, sizeof (t1[0]));
1083 t1->adj_index = vnet_buffer (b1)->ip.adj_index[which_adj_index];
1084 t1->flow_hash = vnet_buffer (b1)->ip.flow_hash;
1086 (vnet_buffer (b1)->sw_if_index[VLIB_TX] !=
1087 (u32) ~ 0) ? vnet_buffer (b1)->sw_if_index[VLIB_TX] :
1088 vec_elt (im->fib_index_by_sw_if_index,
1089 vnet_buffer (b1)->sw_if_index[VLIB_RX]);
1091 clib_memcpy (t1->packet_data,
1092 vlib_buffer_get_current (b1),
1093 sizeof (t1->packet_data));
1103 ip6_forward_next_trace_t *t0;
1107 b0 = vlib_get_buffer (vm, bi0);
1109 if (b0->flags & VLIB_BUFFER_IS_TRACED)
1111 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
1112 t0->adj_index = vnet_buffer (b0)->ip.adj_index[which_adj_index];
1113 t0->flow_hash = vnet_buffer (b0)->ip.flow_hash;
1115 (vnet_buffer (b0)->sw_if_index[VLIB_TX] !=
1116 (u32) ~ 0) ? vnet_buffer (b0)->sw_if_index[VLIB_TX] :
1117 vec_elt (im->fib_index_by_sw_if_index,
1118 vnet_buffer (b0)->sw_if_index[VLIB_RX]);
1120 clib_memcpy (t0->packet_data,
1121 vlib_buffer_get_current (b0),
1122 sizeof (t0->packet_data));
1130 ip6_drop_or_punt (vlib_main_t * vm,
1131 vlib_node_runtime_t * node,
1132 vlib_frame_t * frame, ip6_error_t error_code)
1134 u32 *buffers = vlib_frame_vector_args (frame);
1135 uword n_packets = frame->n_vectors;
1137 vlib_error_drop_buffers (vm, node, buffers,
1141 ip6_input_node.index, error_code);
1143 if (node->flags & VLIB_NODE_FLAG_TRACE)
1144 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
1150 ip6_drop (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
1152 return ip6_drop_or_punt (vm, node, frame, IP6_ERROR_ADJACENCY_DROP);
1156 ip6_punt (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
1158 return ip6_drop_or_punt (vm, node, frame, IP6_ERROR_ADJACENCY_PUNT);
1162 VLIB_REGISTER_NODE (ip6_drop_node, static) =
1164 .function = ip6_drop,
1166 .vector_size = sizeof (u32),
1167 .format_trace = format_ip6_forward_next_trace,
1171 [0] = "error-drop",},
1175 VLIB_NODE_FUNCTION_MULTIARCH (ip6_drop_node, ip6_drop);
1178 VLIB_REGISTER_NODE (ip6_punt_node, static) =
1180 .function = ip6_punt,
1182 .vector_size = sizeof (u32),
1183 .format_trace = format_ip6_forward_next_trace,
1187 [0] = "error-punt",},
1191 VLIB_NODE_FUNCTION_MULTIARCH (ip6_punt_node, ip6_punt);
1193 /* Compute TCP/UDP/ICMP6 checksum in software. */
1195 ip6_tcp_udp_icmp_compute_checksum (vlib_main_t * vm, vlib_buffer_t * p0,
1196 ip6_header_t * ip0, int *bogus_lengthp)
1199 u16 sum16, payload_length_host_byte_order;
1200 u32 i, n_this_buffer, n_bytes_left;
1201 u32 headers_size = sizeof (ip0[0]);
1202 void *data_this_buffer;
1204 ASSERT (bogus_lengthp);
1207 /* Initialize checksum with ip header. */
1208 sum0 = ip0->payload_length + clib_host_to_net_u16 (ip0->protocol);
1209 payload_length_host_byte_order = clib_net_to_host_u16 (ip0->payload_length);
1210 data_this_buffer = (void *) (ip0 + 1);
1212 for (i = 0; i < ARRAY_LEN (ip0->src_address.as_uword); i++)
1214 sum0 = ip_csum_with_carry (sum0,
1215 clib_mem_unaligned (&ip0->
1216 src_address.as_uword[i],
1219 ip_csum_with_carry (sum0,
1220 clib_mem_unaligned (&ip0->dst_address.as_uword[i],
1224 /* some icmp packets may come with a "router alert" hop-by-hop extension header (e.g., mldv2 packets)
1225 * or UDP-Ping packets */
1226 if (PREDICT_FALSE (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
1229 ip6_hop_by_hop_ext_t *ext_hdr =
1230 (ip6_hop_by_hop_ext_t *) data_this_buffer;
1232 /* validate really icmp6 next */
1233 ASSERT ((ext_hdr->next_hdr == IP_PROTOCOL_ICMP6)
1234 || (ext_hdr->next_hdr == IP_PROTOCOL_UDP));
1236 skip_bytes = 8 * (1 + ext_hdr->n_data_u64s);
1237 data_this_buffer = (void *) ((u8 *) data_this_buffer + skip_bytes);
1239 payload_length_host_byte_order -= skip_bytes;
1240 headers_size += skip_bytes;
1243 n_bytes_left = n_this_buffer = payload_length_host_byte_order;
1244 if (p0 && n_this_buffer + headers_size > p0->current_length)
1246 p0->current_length >
1247 headers_size ? p0->current_length - headers_size : 0;
1250 sum0 = ip_incremental_checksum (sum0, data_this_buffer, n_this_buffer);
1251 n_bytes_left -= n_this_buffer;
1252 if (n_bytes_left == 0)
1255 if (!(p0->flags & VLIB_BUFFER_NEXT_PRESENT))
1260 p0 = vlib_get_buffer (vm, p0->next_buffer);
1261 data_this_buffer = vlib_buffer_get_current (p0);
1262 n_this_buffer = p0->current_length;
1265 sum16 = ~ip_csum_fold (sum0);
1271 ip6_tcp_udp_icmp_validate_checksum (vlib_main_t * vm, vlib_buffer_t * p0)
1273 ip6_header_t *ip0 = vlib_buffer_get_current (p0);
1278 /* some icmp packets may come with a "router alert" hop-by-hop extension header (e.g., mldv2 packets) */
1279 ASSERT (ip0->protocol == IP_PROTOCOL_TCP
1280 || ip0->protocol == IP_PROTOCOL_ICMP6
1281 || ip0->protocol == IP_PROTOCOL_UDP
1282 || ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS);
1284 udp0 = (void *) (ip0 + 1);
1285 if (ip0->protocol == IP_PROTOCOL_UDP && udp0->checksum == 0)
1287 p0->flags |= (VNET_BUFFER_F_L4_CHECKSUM_COMPUTED
1288 | VNET_BUFFER_F_L4_CHECKSUM_CORRECT);
1292 sum16 = ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip0, &bogus_length);
1294 p0->flags |= (VNET_BUFFER_F_L4_CHECKSUM_COMPUTED
1295 | ((sum16 == 0) << VNET_BUFFER_F_LOG2_L4_CHECKSUM_CORRECT));
1301 * @brief returns number of links on which src is reachable.
1304 ip6_urpf_loose_check (ip6_main_t * im, vlib_buffer_t * b, ip6_header_t * i)
1306 const load_balance_t *lb0;
1309 lbi = ip6_fib_table_fwding_lookup_with_if_index (im,
1311 (b)->sw_if_index[VLIB_RX],
1314 lb0 = load_balance_get (lbi);
1316 return (fib_urpf_check_size (lb0->lb_urpf));
1320 ip6_local (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
1322 ip6_main_t *im = &ip6_main;
1323 ip_lookup_main_t *lm = &im->lookup_main;
1324 ip_local_next_t next_index;
1325 u32 *from, *to_next, n_left_from, n_left_to_next;
1326 vlib_node_runtime_t *error_node =
1327 vlib_node_get_runtime (vm, ip6_input_node.index);
1329 from = vlib_frame_vector_args (frame);
1330 n_left_from = frame->n_vectors;
1331 next_index = node->cached_next_index;
1333 if (node->flags & VLIB_NODE_FLAG_TRACE)
1334 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
1336 while (n_left_from > 0)
1338 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1340 while (n_left_from >= 4 && n_left_to_next >= 2)
1342 vlib_buffer_t *p0, *p1;
1343 ip6_header_t *ip0, *ip1;
1344 udp_header_t *udp0, *udp1;
1345 u32 pi0, ip_len0, udp_len0, flags0, next0;
1346 u32 pi1, ip_len1, udp_len1, flags1, next1;
1347 i32 len_diff0, len_diff1;
1348 u8 error0, type0, good_l4_checksum0;
1349 u8 error1, type1, good_l4_checksum1;
1350 u32 udp_offset0, udp_offset1;
1352 pi0 = to_next[0] = from[0];
1353 pi1 = to_next[1] = from[1];
1357 n_left_to_next -= 2;
1359 p0 = vlib_get_buffer (vm, pi0);
1360 p1 = vlib_get_buffer (vm, pi1);
1362 ip0 = vlib_buffer_get_current (p0);
1363 ip1 = vlib_buffer_get_current (p1);
1365 vnet_buffer (p0)->l3_hdr_offset = p0->current_data;
1366 vnet_buffer (p1)->l3_hdr_offset = p1->current_data;
1368 type0 = lm->builtin_protocol_by_ip_protocol[ip0->protocol];
1369 type1 = lm->builtin_protocol_by_ip_protocol[ip1->protocol];
1371 next0 = lm->local_next_by_ip_protocol[ip0->protocol];
1372 next1 = lm->local_next_by_ip_protocol[ip1->protocol];
1378 (flags0 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0;
1380 (flags1 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0;
1384 if (PREDICT_TRUE (IP_PROTOCOL_UDP == ip6_locate_header (p0, ip0,
1388 udp0 = (udp_header_t *) ((u8 *) ip0 + udp_offset0);
1389 /* Don't verify UDP checksum for packets with explicit zero checksum. */
1390 good_l4_checksum0 |= type0 == IP_BUILTIN_PROTOCOL_UDP
1391 && udp0->checksum == 0;
1392 /* Verify UDP length. */
1393 ip_len0 = clib_net_to_host_u16 (ip0->payload_length);
1394 udp_len0 = clib_net_to_host_u16 (udp0->length);
1395 len_diff0 = ip_len0 - udp_len0;
1397 if (PREDICT_TRUE (IP_PROTOCOL_UDP == ip6_locate_header (p1, ip1,
1401 udp1 = (udp_header_t *) ((u8 *) ip1 + udp_offset1);
1402 /* Don't verify UDP checksum for packets with explicit zero checksum. */
1403 good_l4_checksum1 |= type1 == IP_BUILTIN_PROTOCOL_UDP
1404 && udp1->checksum == 0;
1405 /* Verify UDP length. */
1406 ip_len1 = clib_net_to_host_u16 (ip1->payload_length);
1407 udp_len1 = clib_net_to_host_u16 (udp1->length);
1408 len_diff1 = ip_len1 - udp_len1;
1411 good_l4_checksum0 |= type0 == IP_BUILTIN_PROTOCOL_UNKNOWN;
1412 good_l4_checksum1 |= type1 == IP_BUILTIN_PROTOCOL_UNKNOWN;
1414 len_diff0 = type0 == IP_BUILTIN_PROTOCOL_UDP ? len_diff0 : 0;
1415 len_diff1 = type1 == IP_BUILTIN_PROTOCOL_UDP ? len_diff1 : 0;
1417 if (PREDICT_FALSE (type0 != IP_BUILTIN_PROTOCOL_UNKNOWN
1418 && !good_l4_checksum0
1420 VNET_BUFFER_F_L4_CHECKSUM_COMPUTED)))
1422 flags0 = ip6_tcp_udp_icmp_validate_checksum (vm, p0);
1424 (flags0 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0;
1426 if (PREDICT_FALSE (type1 != IP_BUILTIN_PROTOCOL_UNKNOWN
1427 && !good_l4_checksum1
1429 VNET_BUFFER_F_L4_CHECKSUM_COMPUTED)))
1431 flags1 = ip6_tcp_udp_icmp_validate_checksum (vm, p1);
1433 (flags1 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0;
1436 error0 = error1 = IP6_ERROR_UNKNOWN_PROTOCOL;
1438 error0 = len_diff0 < 0 ? IP6_ERROR_UDP_LENGTH : error0;
1439 error1 = len_diff1 < 0 ? IP6_ERROR_UDP_LENGTH : error1;
1441 ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_UDP ==
1442 IP6_ERROR_UDP_CHECKSUM);
1443 ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_ICMP ==
1444 IP6_ERROR_ICMP_CHECKSUM);
1446 (!good_l4_checksum0 ? IP6_ERROR_UDP_CHECKSUM + type0 : error0);
1448 (!good_l4_checksum1 ? IP6_ERROR_UDP_CHECKSUM + type1 : error1);
1450 /* Drop packets from unroutable hosts. */
1451 /* If this is a neighbor solicitation (ICMP), skip source RPF check */
1452 if (error0 == IP6_ERROR_UNKNOWN_PROTOCOL &&
1453 type0 != IP_BUILTIN_PROTOCOL_ICMP &&
1454 !ip6_address_is_link_local_unicast (&ip0->src_address))
1456 error0 = (!ip6_urpf_loose_check (im, p0, ip0)
1457 ? IP6_ERROR_SRC_LOOKUP_MISS : error0);
1459 if (error1 == IP6_ERROR_UNKNOWN_PROTOCOL &&
1460 type1 != IP_BUILTIN_PROTOCOL_ICMP &&
1461 !ip6_address_is_link_local_unicast (&ip1->src_address))
1463 error1 = (!ip6_urpf_loose_check (im, p1, ip1)
1464 ? IP6_ERROR_SRC_LOOKUP_MISS : error1);
1468 error0 != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next0;
1470 error1 != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next1;
1472 p0->error = error_node->errors[error0];
1473 p1->error = error_node->errors[error1];
1475 vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
1476 to_next, n_left_to_next,
1477 pi0, pi1, next0, next1);
1480 while (n_left_from > 0 && n_left_to_next > 0)
1485 u32 pi0, ip_len0, udp_len0, flags0, next0;
1487 u8 error0, type0, good_l4_checksum0;
1490 pi0 = to_next[0] = from[0];
1494 n_left_to_next -= 1;
1496 p0 = vlib_get_buffer (vm, pi0);
1498 ip0 = vlib_buffer_get_current (p0);
1500 vnet_buffer (p0)->l3_hdr_offset = p0->current_data;
1502 type0 = lm->builtin_protocol_by_ip_protocol[ip0->protocol];
1503 next0 = lm->local_next_by_ip_protocol[ip0->protocol];
1508 (flags0 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0;
1511 if (PREDICT_TRUE (IP_PROTOCOL_UDP == ip6_locate_header (p0, ip0,
1515 udp0 = (udp_header_t *) ((u8 *) ip0 + udp_offset0);
1516 /* Don't verify UDP checksum for packets with explicit zero checksum. */
1517 good_l4_checksum0 |= type0 == IP_BUILTIN_PROTOCOL_UDP
1518 && udp0->checksum == 0;
1519 /* Verify UDP length. */
1520 ip_len0 = clib_net_to_host_u16 (ip0->payload_length);
1521 udp_len0 = clib_net_to_host_u16 (udp0->length);
1522 len_diff0 = ip_len0 - udp_len0;
1525 good_l4_checksum0 |= type0 == IP_BUILTIN_PROTOCOL_UNKNOWN;
1526 len_diff0 = type0 == IP_BUILTIN_PROTOCOL_UDP ? len_diff0 : 0;
1528 if (PREDICT_FALSE (type0 != IP_BUILTIN_PROTOCOL_UNKNOWN
1529 && !good_l4_checksum0
1531 VNET_BUFFER_F_L4_CHECKSUM_COMPUTED)))
1533 flags0 = ip6_tcp_udp_icmp_validate_checksum (vm, p0);
1535 (flags0 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0;
1538 error0 = IP6_ERROR_UNKNOWN_PROTOCOL;
1540 error0 = len_diff0 < 0 ? IP6_ERROR_UDP_LENGTH : error0;
1542 ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_UDP ==
1543 IP6_ERROR_UDP_CHECKSUM);
1544 ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_ICMP ==
1545 IP6_ERROR_ICMP_CHECKSUM);
1547 (!good_l4_checksum0 ? IP6_ERROR_UDP_CHECKSUM + type0 : error0);
1549 /* If this is a neighbor solicitation (ICMP), skip source RPF check */
1550 if (error0 == IP6_ERROR_UNKNOWN_PROTOCOL &&
1551 type0 != IP_BUILTIN_PROTOCOL_ICMP &&
1552 !ip6_address_is_link_local_unicast (&ip0->src_address))
1554 error0 = (!ip6_urpf_loose_check (im, p0, ip0)
1555 ? IP6_ERROR_SRC_LOOKUP_MISS : error0);
1559 error0 != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next0;
1561 p0->error = error_node->errors[error0];
1563 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1564 to_next, n_left_to_next,
1568 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1571 return frame->n_vectors;
1575 VLIB_REGISTER_NODE (ip6_local_node, static) =
1577 .function = ip6_local,
1578 .name = "ip6-local",
1579 .vector_size = sizeof (u32),
1580 .format_trace = format_ip6_forward_next_trace,
1581 .n_next_nodes = IP_LOCAL_N_NEXT,
1584 [IP_LOCAL_NEXT_DROP] = "error-drop",
1585 [IP_LOCAL_NEXT_PUNT] = "error-punt",
1586 [IP_LOCAL_NEXT_UDP_LOOKUP] = "ip6-udp-lookup",
1587 [IP_LOCAL_NEXT_ICMP] = "ip6-icmp-input",
1592 VLIB_NODE_FUNCTION_MULTIARCH (ip6_local_node, ip6_local);
1595 ip6_register_protocol (u32 protocol, u32 node_index)
1597 vlib_main_t *vm = vlib_get_main ();
1598 ip6_main_t *im = &ip6_main;
1599 ip_lookup_main_t *lm = &im->lookup_main;
1601 ASSERT (protocol < ARRAY_LEN (lm->local_next_by_ip_protocol));
1602 lm->local_next_by_ip_protocol[protocol] =
1603 vlib_node_add_next (vm, ip6_local_node.index, node_index);
1608 IP6_DISCOVER_NEIGHBOR_NEXT_DROP,
1609 IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX,
1610 IP6_DISCOVER_NEIGHBOR_N_NEXT,
1611 } ip6_discover_neighbor_next_t;
1615 IP6_DISCOVER_NEIGHBOR_ERROR_DROP,
1616 IP6_DISCOVER_NEIGHBOR_ERROR_REQUEST_SENT,
1617 IP6_DISCOVER_NEIGHBOR_ERROR_NO_SOURCE_ADDRESS,
1618 } ip6_discover_neighbor_error_t;
1621 ip6_discover_neighbor_inline (vlib_main_t * vm,
1622 vlib_node_runtime_t * node,
1623 vlib_frame_t * frame, int is_glean)
1625 vnet_main_t *vnm = vnet_get_main ();
1626 ip6_main_t *im = &ip6_main;
1627 ip_lookup_main_t *lm = &im->lookup_main;
1628 u32 *from, *to_next_drop;
1629 uword n_left_from, n_left_to_next_drop;
1630 static f64 time_last_seed_change = -1e100;
1631 static u32 hash_seeds[3];
1632 static uword hash_bitmap[256 / BITS (uword)];
1636 if (node->flags & VLIB_NODE_FLAG_TRACE)
1637 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
1639 time_now = vlib_time_now (vm);
1640 if (time_now - time_last_seed_change > 1e-3)
1643 u32 *r = clib_random_buffer_get_data (&vm->random_buffer,
1644 sizeof (hash_seeds));
1645 for (i = 0; i < ARRAY_LEN (hash_seeds); i++)
1646 hash_seeds[i] = r[i];
1648 /* Mark all hash keys as been not-seen before. */
1649 for (i = 0; i < ARRAY_LEN (hash_bitmap); i++)
1652 time_last_seed_change = time_now;
1655 from = vlib_frame_vector_args (frame);
1656 n_left_from = frame->n_vectors;
1658 while (n_left_from > 0)
1660 vlib_get_next_frame (vm, node, IP6_DISCOVER_NEIGHBOR_NEXT_DROP,
1661 to_next_drop, n_left_to_next_drop);
1663 while (n_left_from > 0 && n_left_to_next_drop > 0)
1667 u32 pi0, adj_index0, a0, b0, c0, m0, sw_if_index0, drop0;
1669 ip_adjacency_t *adj0;
1670 vnet_hw_interface_t *hw_if0;
1675 p0 = vlib_get_buffer (vm, pi0);
1677 adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
1679 ip0 = vlib_buffer_get_current (p0);
1681 adj0 = adj_get (adj_index0);
1685 ip0->dst_address.as_u64[0] =
1686 adj0->sub_type.nbr.next_hop.ip6.as_u64[0];
1687 ip0->dst_address.as_u64[1] =
1688 adj0->sub_type.nbr.next_hop.ip6.as_u64[1];
1695 sw_if_index0 = adj0->rewrite_header.sw_if_index;
1696 vnet_buffer (p0)->sw_if_index[VLIB_TX] = sw_if_index0;
1699 b0 ^= ip0->dst_address.as_u32[0];
1700 c0 ^= ip0->dst_address.as_u32[1];
1702 hash_v3_mix32 (a0, b0, c0);
1704 b0 ^= ip0->dst_address.as_u32[2];
1705 c0 ^= ip0->dst_address.as_u32[3];
1707 hash_v3_finalize32 (a0, b0, c0);
1709 c0 &= BITS (hash_bitmap) - 1;
1710 c0 = c0 / BITS (uword);
1711 m0 = (uword) 1 << (c0 % BITS (uword));
1713 bm0 = hash_bitmap[c0];
1714 drop0 = (bm0 & m0) != 0;
1716 /* Mark it as seen. */
1717 hash_bitmap[c0] = bm0 | m0;
1721 to_next_drop[0] = pi0;
1723 n_left_to_next_drop -= 1;
1725 hw_if0 = vnet_get_sup_hw_interface (vnm, sw_if_index0);
1727 /* If the interface is link-down, drop the pkt */
1728 if (!(hw_if0->flags & VNET_HW_INTERFACE_FLAG_LINK_UP))
1732 node->errors[drop0 ? IP6_DISCOVER_NEIGHBOR_ERROR_DROP
1733 : IP6_DISCOVER_NEIGHBOR_ERROR_REQUEST_SENT];
1738 * the adj has been updated to a rewrite but the node the DPO that got
1739 * us here hasn't - yet. no big deal. we'll drop while we wait.
1741 if (IP_LOOKUP_NEXT_REWRITE == adj0->lookup_next_index)
1746 icmp6_neighbor_solicitation_header_t *h0;
1749 h0 = vlib_packet_template_get_packet
1750 (vm, &im->discover_neighbor_packet_template, &bi0);
1753 * Build ethernet header.
1754 * Choose source address based on destination lookup
1757 if (ip6_src_address_for_packet (lm,
1759 &h0->ip.src_address))
1761 /* There is no address on the interface */
1763 node->errors[IP6_DISCOVER_NEIGHBOR_ERROR_NO_SOURCE_ADDRESS];
1764 vlib_buffer_free (vm, &bi0, 1);
1769 * Destination address is a solicited node multicast address.
1770 * We need to fill in
1771 * the low 24 bits with low 24 bits of target's address.
1773 h0->ip.dst_address.as_u8[13] = ip0->dst_address.as_u8[13];
1774 h0->ip.dst_address.as_u8[14] = ip0->dst_address.as_u8[14];
1775 h0->ip.dst_address.as_u8[15] = ip0->dst_address.as_u8[15];
1777 h0->neighbor.target_address = ip0->dst_address;
1779 clib_memcpy (h0->link_layer_option.ethernet_address,
1780 hw_if0->hw_address, vec_len (hw_if0->hw_address));
1782 /* $$$$ appears we need this; why is the checksum non-zero? */
1783 h0->neighbor.icmp.checksum = 0;
1784 h0->neighbor.icmp.checksum =
1785 ip6_tcp_udp_icmp_compute_checksum (vm, 0, &h0->ip,
1788 ASSERT (bogus_length == 0);
1790 vlib_buffer_copy_trace_flag (vm, p0, bi0);
1791 b0 = vlib_get_buffer (vm, bi0);
1792 vnet_buffer (b0)->sw_if_index[VLIB_TX]
1793 = vnet_buffer (p0)->sw_if_index[VLIB_TX];
1795 /* Add rewrite/encap string. */
1796 vnet_rewrite_one_header (adj0[0], h0, sizeof (ethernet_header_t));
1797 vlib_buffer_advance (b0, -adj0->rewrite_header.data_bytes);
1799 next0 = IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX;
1801 vlib_set_next_frame_buffer (vm, node, next0, bi0);
1805 vlib_put_next_frame (vm, node, IP6_DISCOVER_NEIGHBOR_NEXT_DROP,
1806 n_left_to_next_drop);
1809 return frame->n_vectors;
1813 ip6_discover_neighbor (vlib_main_t * vm,
1814 vlib_node_runtime_t * node, vlib_frame_t * frame)
1816 return (ip6_discover_neighbor_inline (vm, node, frame, 0));
1820 ip6_glean (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
1822 return (ip6_discover_neighbor_inline (vm, node, frame, 1));
1825 static char *ip6_discover_neighbor_error_strings[] = {
1826 [IP6_DISCOVER_NEIGHBOR_ERROR_DROP] = "address overflow drops",
1827 [IP6_DISCOVER_NEIGHBOR_ERROR_REQUEST_SENT] = "neighbor solicitations sent",
1828 [IP6_DISCOVER_NEIGHBOR_ERROR_NO_SOURCE_ADDRESS]
1829 = "no source address for ND solicitation",
1833 VLIB_REGISTER_NODE (ip6_discover_neighbor_node) =
1835 .function = ip6_discover_neighbor,
1836 .name = "ip6-discover-neighbor",
1837 .vector_size = sizeof (u32),
1838 .format_trace = format_ip6_forward_next_trace,
1839 .n_errors = ARRAY_LEN (ip6_discover_neighbor_error_strings),
1840 .error_strings = ip6_discover_neighbor_error_strings,
1841 .n_next_nodes = IP6_DISCOVER_NEIGHBOR_N_NEXT,
1844 [IP6_DISCOVER_NEIGHBOR_NEXT_DROP] = "error-drop",
1845 [IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX] = "interface-output",
1851 VLIB_REGISTER_NODE (ip6_glean_node) =
1853 .function = ip6_glean,
1854 .name = "ip6-glean",
1855 .vector_size = sizeof (u32),
1856 .format_trace = format_ip6_forward_next_trace,
1857 .n_errors = ARRAY_LEN (ip6_discover_neighbor_error_strings),
1858 .error_strings = ip6_discover_neighbor_error_strings,
1859 .n_next_nodes = IP6_DISCOVER_NEIGHBOR_N_NEXT,
1862 [IP6_DISCOVER_NEIGHBOR_NEXT_DROP] = "error-drop",
1863 [IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX] = "interface-output",
1869 ip6_probe_neighbor (vlib_main_t * vm, ip6_address_t * dst, u32 sw_if_index)
1871 vnet_main_t *vnm = vnet_get_main ();
1872 ip6_main_t *im = &ip6_main;
1873 icmp6_neighbor_solicitation_header_t *h;
1875 ip_interface_address_t *ia;
1876 ip_adjacency_t *adj;
1877 vnet_hw_interface_t *hi;
1878 vnet_sw_interface_t *si;
1884 si = vnet_get_sw_interface (vnm, sw_if_index);
1886 if (!(si->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP))
1888 return clib_error_return (0, "%U: interface %U down",
1889 format_ip6_address, dst,
1890 format_vnet_sw_if_index_name, vnm,
1895 ip6_interface_address_matching_destination (im, dst, sw_if_index, &ia);
1898 vnm->api_errno = VNET_API_ERROR_NO_MATCHING_INTERFACE;
1899 return clib_error_return
1900 (0, "no matching interface address for destination %U (interface %U)",
1901 format_ip6_address, dst,
1902 format_vnet_sw_if_index_name, vnm, sw_if_index);
1906 vlib_packet_template_get_packet (vm,
1907 &im->discover_neighbor_packet_template,
1910 hi = vnet_get_sup_hw_interface (vnm, sw_if_index);
1912 /* Destination address is a solicited node multicast address. We need to fill in
1913 the low 24 bits with low 24 bits of target's address. */
1914 h->ip.dst_address.as_u8[13] = dst->as_u8[13];
1915 h->ip.dst_address.as_u8[14] = dst->as_u8[14];
1916 h->ip.dst_address.as_u8[15] = dst->as_u8[15];
1918 h->ip.src_address = src[0];
1919 h->neighbor.target_address = dst[0];
1921 clib_memcpy (h->link_layer_option.ethernet_address, hi->hw_address,
1922 vec_len (hi->hw_address));
1924 h->neighbor.icmp.checksum =
1925 ip6_tcp_udp_icmp_compute_checksum (vm, 0, &h->ip, &bogus_length);
1926 ASSERT (bogus_length == 0);
1928 b = vlib_get_buffer (vm, bi);
1929 vnet_buffer (b)->sw_if_index[VLIB_RX] =
1930 vnet_buffer (b)->sw_if_index[VLIB_TX] = sw_if_index;
1932 /* Add encapsulation string for software interface (e.g. ethernet header). */
1933 ip46_address_t nh = {
1937 ai = adj_nbr_add_or_lock (FIB_PROTOCOL_IP6,
1938 VNET_LINK_IP6, &nh, sw_if_index);
1941 vnet_rewrite_one_header (adj[0], h, sizeof (ethernet_header_t));
1942 vlib_buffer_advance (b, -adj->rewrite_header.data_bytes);
1945 vlib_frame_t *f = vlib_get_frame_to_node (vm, hi->output_node_index);
1946 u32 *to_next = vlib_frame_vector_args (f);
1949 vlib_put_frame_to_node (vm, hi->output_node_index, f);
1953 return /* no error */ 0;
1958 IP6_REWRITE_NEXT_DROP,
1959 IP6_REWRITE_NEXT_ICMP_ERROR,
1960 } ip6_rewrite_next_t;
1963 ip6_rewrite_inline (vlib_main_t * vm,
1964 vlib_node_runtime_t * node,
1965 vlib_frame_t * frame,
1966 int do_counters, int is_midchain, int is_mcast)
1968 ip_lookup_main_t *lm = &ip6_main.lookup_main;
1969 u32 *from = vlib_frame_vector_args (frame);
1970 u32 n_left_from, n_left_to_next, *to_next, next_index;
1971 vlib_node_runtime_t *error_node =
1972 vlib_node_get_runtime (vm, ip6_input_node.index);
1974 n_left_from = frame->n_vectors;
1975 next_index = node->cached_next_index;
1976 u32 thread_index = vlib_get_thread_index ();
1978 while (n_left_from > 0)
1980 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1982 while (n_left_from >= 4 && n_left_to_next >= 2)
1984 ip_adjacency_t *adj0, *adj1;
1985 vlib_buffer_t *p0, *p1;
1986 ip6_header_t *ip0, *ip1;
1987 u32 pi0, rw_len0, next0, error0, adj_index0;
1988 u32 pi1, rw_len1, next1, error1, adj_index1;
1989 u32 tx_sw_if_index0, tx_sw_if_index1;
1991 /* Prefetch next iteration. */
1993 vlib_buffer_t *p2, *p3;
1995 p2 = vlib_get_buffer (vm, from[2]);
1996 p3 = vlib_get_buffer (vm, from[3]);
1998 vlib_prefetch_buffer_header (p2, LOAD);
1999 vlib_prefetch_buffer_header (p3, LOAD);
2001 CLIB_PREFETCH (p2->pre_data, 32, STORE);
2002 CLIB_PREFETCH (p3->pre_data, 32, STORE);
2004 CLIB_PREFETCH (p2->data, sizeof (ip0[0]), STORE);
2005 CLIB_PREFETCH (p3->data, sizeof (ip0[0]), STORE);
2008 pi0 = to_next[0] = from[0];
2009 pi1 = to_next[1] = from[1];
2014 n_left_to_next -= 2;
2016 p0 = vlib_get_buffer (vm, pi0);
2017 p1 = vlib_get_buffer (vm, pi1);
2019 adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
2020 adj_index1 = vnet_buffer (p1)->ip.adj_index[VLIB_TX];
2022 ip0 = vlib_buffer_get_current (p0);
2023 ip1 = vlib_buffer_get_current (p1);
2025 error0 = error1 = IP6_ERROR_NONE;
2026 next0 = next1 = IP6_REWRITE_NEXT_DROP;
2028 if (PREDICT_TRUE (!(p0->flags & VNET_BUFFER_F_LOCALLY_ORIGINATED)))
2030 i32 hop_limit0 = ip0->hop_limit;
2032 /* Input node should have reject packets with hop limit 0. */
2033 ASSERT (ip0->hop_limit > 0);
2037 ip0->hop_limit = hop_limit0;
2040 * If the hop count drops below 1 when forwarding, generate
2043 if (PREDICT_FALSE (hop_limit0 <= 0))
2045 error0 = IP6_ERROR_TIME_EXPIRED;
2046 next0 = IP6_REWRITE_NEXT_ICMP_ERROR;
2047 vnet_buffer (p0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
2048 icmp6_error_set_vnet_buffer (p0, ICMP6_time_exceeded,
2049 ICMP6_time_exceeded_ttl_exceeded_in_transit,
2055 p0->flags &= ~VNET_BUFFER_F_LOCALLY_ORIGINATED;
2057 if (PREDICT_TRUE (!(p1->flags & VNET_BUFFER_F_LOCALLY_ORIGINATED)))
2059 i32 hop_limit1 = ip1->hop_limit;
2061 /* Input node should have reject packets with hop limit 0. */
2062 ASSERT (ip1->hop_limit > 0);
2066 ip1->hop_limit = hop_limit1;
2069 * If the hop count drops below 1 when forwarding, generate
2072 if (PREDICT_FALSE (hop_limit1 <= 0))
2074 error1 = IP6_ERROR_TIME_EXPIRED;
2075 next1 = IP6_REWRITE_NEXT_ICMP_ERROR;
2076 vnet_buffer (p1)->sw_if_index[VLIB_TX] = (u32) ~ 0;
2077 icmp6_error_set_vnet_buffer (p1, ICMP6_time_exceeded,
2078 ICMP6_time_exceeded_ttl_exceeded_in_transit,
2084 p1->flags &= ~VNET_BUFFER_F_LOCALLY_ORIGINATED;
2086 adj0 = adj_get (adj_index0);
2087 adj1 = adj_get (adj_index1);
2089 rw_len0 = adj0[0].rewrite_header.data_bytes;
2090 rw_len1 = adj1[0].rewrite_header.data_bytes;
2091 vnet_buffer (p0)->ip.save_rewrite_length = rw_len0;
2092 vnet_buffer (p1)->ip.save_rewrite_length = rw_len1;
2096 vlib_increment_combined_counter
2097 (&adjacency_counters,
2098 thread_index, adj_index0, 1,
2099 vlib_buffer_length_in_chain (vm, p0) + rw_len0);
2100 vlib_increment_combined_counter
2101 (&adjacency_counters,
2102 thread_index, adj_index1, 1,
2103 vlib_buffer_length_in_chain (vm, p1) + rw_len1);
2106 /* Check MTU of outgoing interface. */
2108 (vlib_buffer_length_in_chain (vm, p0) >
2110 rewrite_header.max_l3_packet_bytes ? IP6_ERROR_MTU_EXCEEDED :
2113 (vlib_buffer_length_in_chain (vm, p1) >
2115 rewrite_header.max_l3_packet_bytes ? IP6_ERROR_MTU_EXCEEDED :
2118 /* Don't adjust the buffer for hop count issue; icmp-error node
2119 * wants to see the IP headerr */
2120 if (PREDICT_TRUE (error0 == IP6_ERROR_NONE))
2122 p0->current_data -= rw_len0;
2123 p0->current_length += rw_len0;
2125 tx_sw_if_index0 = adj0[0].rewrite_header.sw_if_index;
2126 vnet_buffer (p0)->sw_if_index[VLIB_TX] = tx_sw_if_index0;
2127 next0 = adj0[0].rewrite_header.next_index;
2130 (adj0[0].rewrite_header.flags & VNET_REWRITE_HAS_FEATURES))
2131 vnet_feature_arc_start (lm->output_feature_arc_index,
2132 tx_sw_if_index0, &next0, p0);
2134 if (PREDICT_TRUE (error1 == IP6_ERROR_NONE))
2136 p1->current_data -= rw_len1;
2137 p1->current_length += rw_len1;
2139 tx_sw_if_index1 = adj1[0].rewrite_header.sw_if_index;
2140 vnet_buffer (p1)->sw_if_index[VLIB_TX] = tx_sw_if_index1;
2141 next1 = adj1[0].rewrite_header.next_index;
2144 (adj1[0].rewrite_header.flags & VNET_REWRITE_HAS_FEATURES))
2145 vnet_feature_arc_start (lm->output_feature_arc_index,
2146 tx_sw_if_index1, &next1, p1);
2149 /* Guess we are only writing on simple Ethernet header. */
2150 vnet_rewrite_two_headers (adj0[0], adj1[0],
2151 ip0, ip1, sizeof (ethernet_header_t));
2155 adj0->sub_type.midchain.fixup_func (vm, adj0, p0);
2156 adj1->sub_type.midchain.fixup_func (vm, adj1, p1);
2161 * copy bytes from the IP address into the MAC rewrite
2163 vnet_fixup_one_header (adj0[0], &ip0->dst_address, ip0);
2164 vnet_fixup_one_header (adj1[0], &ip1->dst_address, ip1);
2167 vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
2168 to_next, n_left_to_next,
2169 pi0, pi1, next0, next1);
2172 while (n_left_from > 0 && n_left_to_next > 0)
2174 ip_adjacency_t *adj0;
2178 u32 adj_index0, next0, error0;
2179 u32 tx_sw_if_index0;
2181 pi0 = to_next[0] = from[0];
2183 p0 = vlib_get_buffer (vm, pi0);
2185 adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
2187 adj0 = adj_get (adj_index0);
2189 ip0 = vlib_buffer_get_current (p0);
2191 error0 = IP6_ERROR_NONE;
2192 next0 = IP6_REWRITE_NEXT_DROP;
2194 /* Check hop limit */
2195 if (PREDICT_TRUE (!(p0->flags & VNET_BUFFER_F_LOCALLY_ORIGINATED)))
2197 i32 hop_limit0 = ip0->hop_limit;
2199 ASSERT (ip0->hop_limit > 0);
2203 ip0->hop_limit = hop_limit0;
2205 if (PREDICT_FALSE (hop_limit0 <= 0))
2208 * If the hop count drops below 1 when forwarding, generate
2211 error0 = IP6_ERROR_TIME_EXPIRED;
2212 next0 = IP6_REWRITE_NEXT_ICMP_ERROR;
2213 vnet_buffer (p0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
2214 icmp6_error_set_vnet_buffer (p0, ICMP6_time_exceeded,
2215 ICMP6_time_exceeded_ttl_exceeded_in_transit,
2221 p0->flags &= ~VNET_BUFFER_F_LOCALLY_ORIGINATED;
2224 /* Guess we are only writing on simple Ethernet header. */
2225 vnet_rewrite_one_header (adj0[0], ip0, sizeof (ethernet_header_t));
2227 /* Update packet buffer attributes/set output interface. */
2228 rw_len0 = adj0[0].rewrite_header.data_bytes;
2229 vnet_buffer (p0)->ip.save_rewrite_length = rw_len0;
2233 vlib_increment_combined_counter
2234 (&adjacency_counters,
2235 thread_index, adj_index0, 1,
2236 vlib_buffer_length_in_chain (vm, p0) + rw_len0);
2239 /* Check MTU of outgoing interface. */
2241 (vlib_buffer_length_in_chain (vm, p0) >
2243 rewrite_header.max_l3_packet_bytes ? IP6_ERROR_MTU_EXCEEDED :
2246 /* Don't adjust the buffer for hop count issue; icmp-error node
2247 * wants to see the IP headerr */
2248 if (PREDICT_TRUE (error0 == IP6_ERROR_NONE))
2250 p0->current_data -= rw_len0;
2251 p0->current_length += rw_len0;
2253 tx_sw_if_index0 = adj0[0].rewrite_header.sw_if_index;
2255 vnet_buffer (p0)->sw_if_index[VLIB_TX] = tx_sw_if_index0;
2256 next0 = adj0[0].rewrite_header.next_index;
2259 (adj0[0].rewrite_header.flags & VNET_REWRITE_HAS_FEATURES))
2260 vnet_feature_arc_start (lm->output_feature_arc_index,
2261 tx_sw_if_index0, &next0, p0);
2266 adj0->sub_type.midchain.fixup_func (vm, adj0, p0);
2270 vnet_fixup_one_header (adj0[0], &ip0->dst_address, ip0);
2273 p0->error = error_node->errors[error0];
2278 n_left_to_next -= 1;
2280 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
2281 to_next, n_left_to_next,
2285 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2288 /* Need to do trace after rewrites to pick up new packet data. */
2289 if (node->flags & VLIB_NODE_FLAG_TRACE)
2290 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
2292 return frame->n_vectors;
2296 ip6_rewrite (vlib_main_t * vm,
2297 vlib_node_runtime_t * node, vlib_frame_t * frame)
2299 if (adj_are_counters_enabled ())
2300 return ip6_rewrite_inline (vm, node, frame, 1, 0, 0);
2302 return ip6_rewrite_inline (vm, node, frame, 0, 0, 0);
2306 ip6_rewrite_mcast (vlib_main_t * vm,
2307 vlib_node_runtime_t * node, vlib_frame_t * frame)
2309 if (adj_are_counters_enabled ())
2310 return ip6_rewrite_inline (vm, node, frame, 1, 0, 1);
2312 return ip6_rewrite_inline (vm, node, frame, 0, 0, 1);
2316 ip6_midchain (vlib_main_t * vm,
2317 vlib_node_runtime_t * node, vlib_frame_t * frame)
2319 if (adj_are_counters_enabled ())
2320 return ip6_rewrite_inline (vm, node, frame, 1, 1, 0);
2322 return ip6_rewrite_inline (vm, node, frame, 0, 1, 0);
2326 ip6_mcast_midchain (vlib_main_t * vm,
2327 vlib_node_runtime_t * node, vlib_frame_t * frame)
2329 if (adj_are_counters_enabled ())
2330 return ip6_rewrite_inline (vm, node, frame, 1, 1, 1);
2332 return ip6_rewrite_inline (vm, node, frame, 0, 1, 1);
2336 VLIB_REGISTER_NODE (ip6_midchain_node) =
2338 .function = ip6_midchain,
2339 .name = "ip6-midchain",
2340 .vector_size = sizeof (u32),
2341 .format_trace = format_ip6_forward_next_trace,
2342 .sibling_of = "ip6-rewrite",
2346 VLIB_NODE_FUNCTION_MULTIARCH (ip6_midchain_node, ip6_midchain);
2349 VLIB_REGISTER_NODE (ip6_rewrite_node) =
2351 .function = ip6_rewrite,
2352 .name = "ip6-rewrite",
2353 .vector_size = sizeof (u32),
2354 .format_trace = format_ip6_rewrite_trace,
2358 [IP6_REWRITE_NEXT_DROP] = "error-drop",
2359 [IP6_REWRITE_NEXT_ICMP_ERROR] = "ip6-icmp-error",
2364 VLIB_NODE_FUNCTION_MULTIARCH (ip6_rewrite_node, ip6_rewrite);
2367 VLIB_REGISTER_NODE (ip6_rewrite_mcast_node) =
2369 .function = ip6_rewrite_mcast,
2370 .name = "ip6-rewrite-mcast",
2371 .vector_size = sizeof (u32),
2372 .format_trace = format_ip6_rewrite_trace,
2373 .sibling_of = "ip6-rewrite",
2377 VLIB_NODE_FUNCTION_MULTIARCH (ip6_rewrite_mcast_node, ip6_rewrite_mcast);
2380 VLIB_REGISTER_NODE (ip6_mcast_midchain_node, static) =
2382 .function = ip6_mcast_midchain,
2383 .name = "ip6-mcast-midchain",
2384 .vector_size = sizeof (u32),
2385 .format_trace = format_ip6_rewrite_trace,
2386 .sibling_of = "ip6-rewrite",
2390 VLIB_NODE_FUNCTION_MULTIARCH (ip6_mcast_midchain_node, ip6_mcast_midchain);
2393 * Hop-by-Hop handling
2395 ip6_hop_by_hop_main_t ip6_hop_by_hop_main;
2397 #define foreach_ip6_hop_by_hop_error \
2398 _(PROCESSED, "pkts with ip6 hop-by-hop options") \
2399 _(FORMAT, "incorrectly formatted hop-by-hop options") \
2400 _(UNKNOWN_OPTION, "unknown ip6 hop-by-hop options")
2405 #define _(sym,str) IP6_HOP_BY_HOP_ERROR_##sym,
2406 foreach_ip6_hop_by_hop_error
2408 IP6_HOP_BY_HOP_N_ERROR,
2409 } ip6_hop_by_hop_error_t;
2413 * Primary h-b-h handler trace support
2414 * We work pretty hard on the problem for obvious reasons
2420 u8 option_data[256];
2421 } ip6_hop_by_hop_trace_t;
2423 vlib_node_registration_t ip6_hop_by_hop_node;
2425 static char *ip6_hop_by_hop_error_strings[] = {
2426 #define _(sym,string) string,
2427 foreach_ip6_hop_by_hop_error
2432 format_ip6_hop_by_hop_ext_hdr (u8 * s, va_list * args)
2434 ip6_hop_by_hop_header_t *hbh0 = va_arg (*args, ip6_hop_by_hop_header_t *);
2435 int total_len = va_arg (*args, int);
2436 ip6_hop_by_hop_option_t *opt0, *limit0;
2437 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2440 s = format (s, "IP6_HOP_BY_HOP: next protocol %d len %d total %d",
2441 hbh0->protocol, (hbh0->length + 1) << 3, total_len);
2443 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2444 limit0 = (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 + total_len);
2446 while (opt0 < limit0)
2451 case 0: /* Pad, just stop */
2452 opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0 + 1);
2456 if (hm->trace[type0])
2458 s = (*hm->trace[type0]) (s, opt0);
2463 format (s, "\n unrecognized option %d length %d", type0,
2467 (ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length +
2468 sizeof (ip6_hop_by_hop_option_t));
2476 format_ip6_hop_by_hop_trace (u8 * s, va_list * args)
2478 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
2479 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
2480 ip6_hop_by_hop_trace_t *t = va_arg (*args, ip6_hop_by_hop_trace_t *);
2481 ip6_hop_by_hop_header_t *hbh0;
2482 ip6_hop_by_hop_option_t *opt0, *limit0;
2483 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2487 hbh0 = (ip6_hop_by_hop_header_t *) t->option_data;
2489 s = format (s, "IP6_HOP_BY_HOP: next index %d len %d traced %d",
2490 t->next_index, (hbh0->length + 1) << 3, t->trace_len);
2492 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2493 limit0 = (ip6_hop_by_hop_option_t *) ((u8 *) hbh0) + t->trace_len;
2495 while (opt0 < limit0)
2500 case 0: /* Pad, just stop */
2501 opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0) + 1;
2505 if (hm->trace[type0])
2507 s = (*hm->trace[type0]) (s, opt0);
2512 format (s, "\n unrecognized option %d length %d", type0,
2516 (ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length +
2517 sizeof (ip6_hop_by_hop_option_t));
2525 ip6_scan_hbh_options (vlib_buffer_t * b0,
2527 ip6_hop_by_hop_header_t * hbh0,
2528 ip6_hop_by_hop_option_t * opt0,
2529 ip6_hop_by_hop_option_t * limit0, u32 * next0)
2531 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2535 while (opt0 < limit0)
2541 opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0) + 1;
2546 if (hm->options[type0])
2548 if ((*hm->options[type0]) (b0, ip0, opt0) < 0)
2550 error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2556 /* Unrecognized mandatory option, check the two high order bits */
2557 switch (opt0->type & HBH_OPTION_TYPE_HIGH_ORDER_BITS)
2559 case HBH_OPTION_TYPE_SKIP_UNKNOWN:
2561 case HBH_OPTION_TYPE_DISCARD_UNKNOWN:
2562 error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2563 *next0 = IP_LOOKUP_NEXT_DROP;
2565 case HBH_OPTION_TYPE_DISCARD_UNKNOWN_ICMP:
2566 error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2567 *next0 = IP_LOOKUP_NEXT_ICMP_ERROR;
2568 icmp6_error_set_vnet_buffer (b0, ICMP6_parameter_problem,
2569 ICMP6_parameter_problem_unrecognized_option,
2570 (u8 *) opt0 - (u8 *) ip0);
2572 case HBH_OPTION_TYPE_DISCARD_UNKNOWN_ICMP_NOT_MCAST:
2573 error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2574 if (!ip6_address_is_multicast (&ip0->dst_address))
2576 *next0 = IP_LOOKUP_NEXT_ICMP_ERROR;
2577 icmp6_error_set_vnet_buffer (b0,
2578 ICMP6_parameter_problem,
2579 ICMP6_parameter_problem_unrecognized_option,
2580 (u8 *) opt0 - (u8 *) ip0);
2584 *next0 = IP_LOOKUP_NEXT_DROP;
2592 (ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length +
2593 sizeof (ip6_hop_by_hop_option_t));
2599 * Process the Hop-by-Hop Options header
2602 ip6_hop_by_hop (vlib_main_t * vm,
2603 vlib_node_runtime_t * node, vlib_frame_t * frame)
2605 vlib_node_runtime_t *error_node =
2606 vlib_node_get_runtime (vm, ip6_hop_by_hop_node.index);
2607 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2608 u32 n_left_from, *from, *to_next;
2609 ip_lookup_next_t next_index;
2611 from = vlib_frame_vector_args (frame);
2612 n_left_from = frame->n_vectors;
2613 next_index = node->cached_next_index;
2615 while (n_left_from > 0)
2619 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
2621 while (n_left_from >= 4 && n_left_to_next >= 2)
2624 vlib_buffer_t *b0, *b1;
2626 ip6_header_t *ip0, *ip1;
2627 ip6_hop_by_hop_header_t *hbh0, *hbh1;
2628 ip6_hop_by_hop_option_t *opt0, *limit0, *opt1, *limit1;
2629 u8 error0 = 0, error1 = 0;
2631 /* Prefetch next iteration. */
2633 vlib_buffer_t *p2, *p3;
2635 p2 = vlib_get_buffer (vm, from[2]);
2636 p3 = vlib_get_buffer (vm, from[3]);
2638 vlib_prefetch_buffer_header (p2, LOAD);
2639 vlib_prefetch_buffer_header (p3, LOAD);
2641 CLIB_PREFETCH (p2->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
2642 CLIB_PREFETCH (p3->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
2645 /* Speculatively enqueue b0, b1 to the current next frame */
2646 to_next[0] = bi0 = from[0];
2647 to_next[1] = bi1 = from[1];
2651 n_left_to_next -= 2;
2653 b0 = vlib_get_buffer (vm, bi0);
2654 b1 = vlib_get_buffer (vm, bi1);
2656 /* Default use the next_index from the adjacency. A HBH option rarely redirects to a different node */
2657 u32 adj_index0 = vnet_buffer (b0)->ip.adj_index[VLIB_TX];
2658 ip_adjacency_t *adj0 = adj_get (adj_index0);
2659 u32 adj_index1 = vnet_buffer (b1)->ip.adj_index[VLIB_TX];
2660 ip_adjacency_t *adj1 = adj_get (adj_index1);
2662 /* Default use the next_index from the adjacency. A HBH option rarely redirects to a different node */
2663 next0 = adj0->lookup_next_index;
2664 next1 = adj1->lookup_next_index;
2666 ip0 = vlib_buffer_get_current (b0);
2667 ip1 = vlib_buffer_get_current (b1);
2668 hbh0 = (ip6_hop_by_hop_header_t *) (ip0 + 1);
2669 hbh1 = (ip6_hop_by_hop_header_t *) (ip1 + 1);
2670 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2671 opt1 = (ip6_hop_by_hop_option_t *) (hbh1 + 1);
2673 (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 +
2674 ((hbh0->length + 1) << 3));
2676 (ip6_hop_by_hop_option_t *) ((u8 *) hbh1 +
2677 ((hbh1->length + 1) << 3));
2680 * Basic validity checks
2682 if ((hbh0->length + 1) << 3 >
2683 clib_net_to_host_u16 (ip0->payload_length))
2685 error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2686 next0 = IP_LOOKUP_NEXT_DROP;
2689 /* Scan the set of h-b-h options, process ones that we understand */
2690 error0 = ip6_scan_hbh_options (b0, ip0, hbh0, opt0, limit0, &next0);
2692 if ((hbh1->length + 1) << 3 >
2693 clib_net_to_host_u16 (ip1->payload_length))
2695 error1 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2696 next1 = IP_LOOKUP_NEXT_DROP;
2699 /* Scan the set of h-b-h options, process ones that we understand */
2700 error1 = ip6_scan_hbh_options (b1, ip1, hbh1, opt1, limit1, &next1);
2703 /* Has the classifier flagged this buffer for special treatment? */
2706 && (vnet_buffer (b0)->l2_classify.opaque_index & OI_DECAP)))
2707 next0 = hm->next_override;
2709 /* Has the classifier flagged this buffer for special treatment? */
2712 && (vnet_buffer (b1)->l2_classify.opaque_index & OI_DECAP)))
2713 next1 = hm->next_override;
2715 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)))
2717 if (b0->flags & VLIB_BUFFER_IS_TRACED)
2719 ip6_hop_by_hop_trace_t *t =
2720 vlib_add_trace (vm, node, b0, sizeof (*t));
2721 u32 trace_len = (hbh0->length + 1) << 3;
2722 t->next_index = next0;
2723 /* Capture the h-b-h option verbatim */
2726 ARRAY_LEN (t->option_data) ? trace_len :
2727 ARRAY_LEN (t->option_data);
2728 t->trace_len = trace_len;
2729 clib_memcpy (t->option_data, hbh0, trace_len);
2731 if (b1->flags & VLIB_BUFFER_IS_TRACED)
2733 ip6_hop_by_hop_trace_t *t =
2734 vlib_add_trace (vm, node, b1, sizeof (*t));
2735 u32 trace_len = (hbh1->length + 1) << 3;
2736 t->next_index = next1;
2737 /* Capture the h-b-h option verbatim */
2740 ARRAY_LEN (t->option_data) ? trace_len :
2741 ARRAY_LEN (t->option_data);
2742 t->trace_len = trace_len;
2743 clib_memcpy (t->option_data, hbh1, trace_len);
2748 b0->error = error_node->errors[error0];
2749 b1->error = error_node->errors[error1];
2751 /* verify speculative enqueue, maybe switch current next frame */
2752 vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
2753 n_left_to_next, bi0, bi1, next0,
2757 while (n_left_from > 0 && n_left_to_next > 0)
2763 ip6_hop_by_hop_header_t *hbh0;
2764 ip6_hop_by_hop_option_t *opt0, *limit0;
2767 /* Speculatively enqueue b0 to the current next frame */
2773 n_left_to_next -= 1;
2775 b0 = vlib_get_buffer (vm, bi0);
2777 * Default use the next_index from the adjacency.
2778 * A HBH option rarely redirects to a different node
2780 u32 adj_index0 = vnet_buffer (b0)->ip.adj_index[VLIB_TX];
2781 ip_adjacency_t *adj0 = adj_get (adj_index0);
2782 next0 = adj0->lookup_next_index;
2784 ip0 = vlib_buffer_get_current (b0);
2785 hbh0 = (ip6_hop_by_hop_header_t *) (ip0 + 1);
2786 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2788 (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 +
2789 ((hbh0->length + 1) << 3));
2792 * Basic validity checks
2794 if ((hbh0->length + 1) << 3 >
2795 clib_net_to_host_u16 (ip0->payload_length))
2797 error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2798 next0 = IP_LOOKUP_NEXT_DROP;
2802 /* Scan the set of h-b-h options, process ones that we understand */
2803 error0 = ip6_scan_hbh_options (b0, ip0, hbh0, opt0, limit0, &next0);
2806 /* Has the classifier flagged this buffer for special treatment? */
2809 && (vnet_buffer (b0)->l2_classify.opaque_index & OI_DECAP)))
2810 next0 = hm->next_override;
2812 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
2814 ip6_hop_by_hop_trace_t *t =
2815 vlib_add_trace (vm, node, b0, sizeof (*t));
2816 u32 trace_len = (hbh0->length + 1) << 3;
2817 t->next_index = next0;
2818 /* Capture the h-b-h option verbatim */
2821 ARRAY_LEN (t->option_data) ? trace_len :
2822 ARRAY_LEN (t->option_data);
2823 t->trace_len = trace_len;
2824 clib_memcpy (t->option_data, hbh0, trace_len);
2827 b0->error = error_node->errors[error0];
2829 /* verify speculative enqueue, maybe switch current next frame */
2830 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
2831 n_left_to_next, bi0, next0);
2833 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2835 return frame->n_vectors;
2839 VLIB_REGISTER_NODE (ip6_hop_by_hop_node) =
2841 .function = ip6_hop_by_hop,
2842 .name = "ip6-hop-by-hop",
2843 .sibling_of = "ip6-lookup",
2844 .vector_size = sizeof (u32),
2845 .format_trace = format_ip6_hop_by_hop_trace,
2846 .type = VLIB_NODE_TYPE_INTERNAL,
2847 .n_errors = ARRAY_LEN (ip6_hop_by_hop_error_strings),
2848 .error_strings = ip6_hop_by_hop_error_strings,
2853 VLIB_NODE_FUNCTION_MULTIARCH (ip6_hop_by_hop_node, ip6_hop_by_hop);
2855 static clib_error_t *
2856 ip6_hop_by_hop_init (vlib_main_t * vm)
2858 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2859 memset (hm->options, 0, sizeof (hm->options));
2860 memset (hm->trace, 0, sizeof (hm->trace));
2861 hm->next_override = IP6_LOOKUP_NEXT_POP_HOP_BY_HOP;
2865 VLIB_INIT_FUNCTION (ip6_hop_by_hop_init);
2868 ip6_hbh_set_next_override (uword next)
2870 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2872 hm->next_override = next;
2876 ip6_hbh_register_option (u8 option,
2877 int options (vlib_buffer_t * b, ip6_header_t * ip,
2878 ip6_hop_by_hop_option_t * opt),
2879 u8 * trace (u8 * s, ip6_hop_by_hop_option_t * opt))
2881 ip6_main_t *im = &ip6_main;
2882 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2884 ASSERT (option < ARRAY_LEN (hm->options));
2886 /* Already registered */
2887 if (hm->options[option])
2890 hm->options[option] = options;
2891 hm->trace[option] = trace;
2893 /* Set global variable */
2894 im->hbh_enabled = 1;
2900 ip6_hbh_unregister_option (u8 option)
2902 ip6_main_t *im = &ip6_main;
2903 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2905 ASSERT (option < ARRAY_LEN (hm->options));
2907 /* Not registered */
2908 if (!hm->options[option])
2911 hm->options[option] = NULL;
2912 hm->trace[option] = NULL;
2914 /* Disable global knob if this was the last option configured */
2917 for (i = 0; i < 256; i++)
2919 if (hm->options[option])
2926 im->hbh_enabled = 0;
2931 /* Global IP6 main. */
2932 ip6_main_t ip6_main;
2934 static clib_error_t *
2935 ip6_lookup_init (vlib_main_t * vm)
2937 ip6_main_t *im = &ip6_main;
2938 clib_error_t *error;
2941 if ((error = vlib_call_init_function (vm, vnet_feature_init)))
2944 for (i = 0; i < ARRAY_LEN (im->fib_masks); i++)
2951 for (j = 0; j < i0; j++)
2952 im->fib_masks[i].as_u32[j] = ~0;
2955 im->fib_masks[i].as_u32[i0] =
2956 clib_host_to_net_u32 (pow2_mask (i1) << (32 - i1));
2959 ip_lookup_init (&im->lookup_main, /* is_ip6 */ 1);
2961 if (im->lookup_table_nbuckets == 0)
2962 im->lookup_table_nbuckets = IP6_FIB_DEFAULT_HASH_NUM_BUCKETS;
2964 im->lookup_table_nbuckets = 1 << max_log2 (im->lookup_table_nbuckets);
2966 if (im->lookup_table_size == 0)
2967 im->lookup_table_size = IP6_FIB_DEFAULT_HASH_MEMORY_SIZE;
2969 BV (clib_bihash_init) (&(im->ip6_table[IP6_FIB_TABLE_FWDING].ip6_hash),
2970 "ip6 FIB fwding table",
2971 im->lookup_table_nbuckets, im->lookup_table_size);
2972 BV (clib_bihash_init) (&im->ip6_table[IP6_FIB_TABLE_NON_FWDING].ip6_hash,
2973 "ip6 FIB non-fwding table",
2974 im->lookup_table_nbuckets, im->lookup_table_size);
2976 /* Create FIB with index 0 and table id of 0. */
2977 fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6, 0);
2978 mfib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6, 0);
2982 pn = pg_get_node (ip6_lookup_node.index);
2983 pn->unformat_edit = unformat_pg_ip6_header;
2986 /* Unless explicitly configured, don't process HBH options */
2987 im->hbh_enabled = 0;
2990 icmp6_neighbor_solicitation_header_t p;
2992 memset (&p, 0, sizeof (p));
2994 p.ip.ip_version_traffic_class_and_flow_label =
2995 clib_host_to_net_u32 (0x6 << 28);
2996 p.ip.payload_length =
2997 clib_host_to_net_u16 (sizeof (p) -
2999 (icmp6_neighbor_solicitation_header_t, neighbor));
3000 p.ip.protocol = IP_PROTOCOL_ICMP6;
3001 p.ip.hop_limit = 255;
3002 ip6_set_solicited_node_multicast_address (&p.ip.dst_address, 0);
3004 p.neighbor.icmp.type = ICMP6_neighbor_solicitation;
3006 p.link_layer_option.header.type =
3007 ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address;
3008 p.link_layer_option.header.n_data_u64s =
3009 sizeof (p.link_layer_option) / sizeof (u64);
3011 vlib_packet_template_init (vm,
3012 &im->discover_neighbor_packet_template,
3014 /* alloc chunk size */ 8,
3015 "ip6 neighbor discovery");
3021 VLIB_INIT_FUNCTION (ip6_lookup_init);
3023 static clib_error_t *
3024 add_del_ip6_interface_table (vlib_main_t * vm,
3025 unformat_input_t * input,
3026 vlib_cli_command_t * cmd)
3028 vnet_main_t *vnm = vnet_get_main ();
3029 ip_interface_address_t *ia;
3030 clib_error_t *error = 0;
3031 u32 sw_if_index, table_id;
3035 if (!unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
3037 error = clib_error_return (0, "unknown interface `%U'",
3038 format_unformat_error, input);
3042 if (unformat (input, "%d", &table_id))
3046 error = clib_error_return (0, "expected table id `%U'",
3047 format_unformat_error, input);
3052 * If the interface already has in IP address, then a change int
3053 * VRF is not allowed. The IP address applied must first be removed.
3054 * We do not do that automatically here, since VPP has no knowledge
3055 * of whether thoses subnets are valid in the destination VRF.
3058 foreach_ip_interface_address (&ip6_main.lookup_main,
3060 1 /* honor unnumbered */,
3064 a = ip_interface_address_get_address (&ip6_main.lookup_main, ia);
3065 error = clib_error_return (0, "interface %U has address %U",
3066 format_vnet_sw_if_index_name, vnm,
3068 format_ip6_address, a);
3074 u32 fib_index = fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6,
3077 vec_validate (ip6_main.fib_index_by_sw_if_index, sw_if_index);
3078 ip6_main.fib_index_by_sw_if_index[sw_if_index] = fib_index;
3080 fib_index = mfib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6,
3083 vec_validate (ip6_main.mfib_index_by_sw_if_index, sw_if_index);
3084 ip6_main.mfib_index_by_sw_if_index[sw_if_index] = fib_index;
3093 * Place the indicated interface into the supplied IPv6 FIB table (also known
3094 * as a VRF). If the FIB table does not exist, this command creates it. To
3095 * display the current IPv6 FIB table, use the command '<em>show ip6 fib</em>'.
3096 * FIB table will only be displayed if a route has been added to the table, or
3097 * an IP Address is assigned to an interface in the table (which adds a route
3100 * @note IP addresses added after setting the interface IP table are added to
3101 * the indicated FIB table. If an IP address is added prior to changing the
3102 * table then this is an error. The control plane must remove these addresses
3103 * first and then change the table. VPP will not automatically move the
3104 * addresses from the old to the new table as it does not know the validity
3108 * Example of how to add an interface to an IPv6 FIB table (where 2 is the table-id):
3109 * @cliexcmd{set interface ip6 table GigabitEthernet2/0/0 2}
3112 VLIB_CLI_COMMAND (set_interface_ip6_table_command, static) =
3114 .path = "set interface ip6 table",
3115 .function = add_del_ip6_interface_table,
3116 .short_help = "set interface ip6 table <interface> <table-id>"
3121 ip6_link_local_address_from_ethernet_mac_address (ip6_address_t * ip,
3124 ip->as_u64[0] = clib_host_to_net_u64 (0xFE80000000000000ULL);
3125 /* Invert the "u" bit */
3126 ip->as_u8[8] = mac[0] ^ (1 << 1);
3127 ip->as_u8[9] = mac[1];
3128 ip->as_u8[10] = mac[2];
3129 ip->as_u8[11] = 0xFF;
3130 ip->as_u8[12] = 0xFE;
3131 ip->as_u8[13] = mac[3];
3132 ip->as_u8[14] = mac[4];
3133 ip->as_u8[15] = mac[5];
3137 ip6_ethernet_mac_address_from_link_local_address (u8 * mac,
3140 /* Invert the previously inverted "u" bit */
3141 mac[0] = ip->as_u8[8] ^ (1 << 1);
3142 mac[1] = ip->as_u8[9];
3143 mac[2] = ip->as_u8[10];
3144 mac[3] = ip->as_u8[13];
3145 mac[4] = ip->as_u8[14];
3146 mac[5] = ip->as_u8[15];
3149 static clib_error_t *
3150 test_ip6_link_command_fn (vlib_main_t * vm,
3151 unformat_input_t * input, vlib_cli_command_t * cmd)
3154 ip6_address_t _a, *a = &_a;
3156 if (unformat (input, "%U", unformat_ethernet_address, mac))
3158 ip6_link_local_address_from_ethernet_mac_address (a, mac);
3159 vlib_cli_output (vm, "Link local address: %U", format_ip6_address, a);
3160 ip6_ethernet_mac_address_from_link_local_address (mac, a);
3161 vlib_cli_output (vm, "Original MAC address: %U",
3162 format_ethernet_address, mac);
3169 * This command converts the given MAC Address into an IPv6 link-local
3173 * Example of how to create an IPv6 link-local address:
3174 * @cliexstart{test ip6 link 16:d9:e0:91:79:86}
3175 * Link local address: fe80::14d9:e0ff:fe91:7986
3176 * Original MAC address: 16:d9:e0:91:79:86
3180 VLIB_CLI_COMMAND (test_link_command, static) =
3182 .path = "test ip6 link",
3183 .function = test_ip6_link_command_fn,
3184 .short_help = "test ip6 link <mac-address>",
3189 vnet_set_ip6_flow_hash (u32 table_id, u32 flow_hash_config)
3193 fib_index = fib_table_find (FIB_PROTOCOL_IP6, table_id);
3195 if (~0 == fib_index)
3196 return VNET_API_ERROR_NO_SUCH_FIB;
3198 fib_table_set_flow_hash_config (fib_index, FIB_PROTOCOL_IP6,
3204 static clib_error_t *
3205 set_ip6_flow_hash_command_fn (vlib_main_t * vm,
3206 unformat_input_t * input,
3207 vlib_cli_command_t * cmd)
3211 u32 flow_hash_config = 0;
3214 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
3216 if (unformat (input, "table %d", &table_id))
3219 else if (unformat (input, #a)) { flow_hash_config |= v; matched=1;}
3220 foreach_flow_hash_bit
3227 return clib_error_return (0, "unknown input `%U'",
3228 format_unformat_error, input);
3230 rv = vnet_set_ip6_flow_hash (table_id, flow_hash_config);
3237 return clib_error_return (0, "no such FIB table %d", table_id);
3240 clib_warning ("BUG: illegal flow hash config 0x%x", flow_hash_config);
3248 * Configure the set of IPv6 fields used by the flow hash.
3252 * Example of how to set the flow hash on a given table:
3253 * @cliexcmd{set ip6 flow-hash table 8 dst sport dport proto}
3255 * Example of display the configured flow hash:
3256 * @cliexstart{show ip6 fib}
3257 * ipv6-VRF:0, fib_index 0, flow hash: src dst sport dport proto
3260 * [@0]: dpo-load-balance: [index:5 buckets:1 uRPF:5 to:[0:0]]
3261 * [0] [@0]: dpo-drop ip6
3264 * [@0]: dpo-load-balance: [index:10 buckets:1 uRPF:10 to:[0:0]]
3265 * [0] [@2]: dpo-receive
3268 * [@0]: dpo-load-balance: [index:8 buckets:1 uRPF:8 to:[0:0]]
3269 * [0] [@2]: dpo-receive
3272 * [@0]: dpo-load-balance: [index:7 buckets:1 uRPF:7 to:[0:0]]
3273 * [0] [@2]: dpo-receive
3276 * [@0]: dpo-load-balance: [index:9 buckets:1 uRPF:9 to:[0:0]]
3277 * [0] [@2]: dpo-receive
3278 * ff02::1:ff00:0/104
3280 * [@0]: dpo-load-balance: [index:6 buckets:1 uRPF:6 to:[0:0]]
3281 * [0] [@2]: dpo-receive
3282 * ipv6-VRF:8, fib_index 1, flow hash: dst sport dport proto
3285 * [@0]: dpo-load-balance: [index:21 buckets:1 uRPF:20 to:[0:0]]
3286 * [0] [@0]: dpo-drop ip6
3289 * [@0]: dpo-load-balance: [index:27 buckets:1 uRPF:26 to:[0:0]]
3290 * [0] [@4]: ipv6-glean: af_packet0
3293 * [@0]: dpo-load-balance: [index:28 buckets:1 uRPF:27 to:[0:0]]
3294 * [0] [@2]: dpo-receive: @::a:1:1:0:7 on af_packet0
3297 * [@0]: dpo-load-balance: [index:26 buckets:1 uRPF:25 to:[0:0]]
3298 * [0] [@2]: dpo-receive
3299 * fe80::fe:3eff:fe3e:9222/128
3301 * [@0]: dpo-load-balance: [index:29 buckets:1 uRPF:28 to:[0:0]]
3302 * [0] [@2]: dpo-receive: fe80::fe:3eff:fe3e:9222 on af_packet0
3305 * [@0]: dpo-load-balance: [index:24 buckets:1 uRPF:23 to:[0:0]]
3306 * [0] [@2]: dpo-receive
3309 * [@0]: dpo-load-balance: [index:23 buckets:1 uRPF:22 to:[0:0]]
3310 * [0] [@2]: dpo-receive
3313 * [@0]: dpo-load-balance: [index:25 buckets:1 uRPF:24 to:[0:0]]
3314 * [0] [@2]: dpo-receive
3315 * ff02::1:ff00:0/104
3317 * [@0]: dpo-load-balance: [index:22 buckets:1 uRPF:21 to:[0:0]]
3318 * [0] [@2]: dpo-receive
3323 VLIB_CLI_COMMAND (set_ip6_flow_hash_command, static) =
3325 .path = "set ip6 flow-hash",
3327 "set ip6 flow-hash table <table-id> [src] [dst] [sport] [dport] [proto] [reverse]",
3328 .function = set_ip6_flow_hash_command_fn,
3332 static clib_error_t *
3333 show_ip6_local_command_fn (vlib_main_t * vm,
3334 unformat_input_t * input, vlib_cli_command_t * cmd)
3336 ip6_main_t *im = &ip6_main;
3337 ip_lookup_main_t *lm = &im->lookup_main;
3340 vlib_cli_output (vm, "Protocols handled by ip6_local");
3341 for (i = 0; i < ARRAY_LEN (lm->local_next_by_ip_protocol); i++)
3343 if (lm->local_next_by_ip_protocol[i] != IP_LOCAL_NEXT_PUNT)
3344 vlib_cli_output (vm, "%d", i);
3352 * Display the set of protocols handled by the local IPv6 stack.
3355 * Example of how to display local protocol table:
3356 * @cliexstart{show ip6 local}
3357 * Protocols handled by ip6_local
3365 VLIB_CLI_COMMAND (show_ip6_local, static) =
3367 .path = "show ip6 local",
3368 .function = show_ip6_local_command_fn,
3369 .short_help = "show ip6 local",
3374 vnet_set_ip6_classify_intfc (vlib_main_t * vm, u32 sw_if_index,
3377 vnet_main_t *vnm = vnet_get_main ();
3378 vnet_interface_main_t *im = &vnm->interface_main;
3379 ip6_main_t *ipm = &ip6_main;
3380 ip_lookup_main_t *lm = &ipm->lookup_main;
3381 vnet_classify_main_t *cm = &vnet_classify_main;
3382 ip6_address_t *if_addr;
3384 if (pool_is_free_index (im->sw_interfaces, sw_if_index))
3385 return VNET_API_ERROR_NO_MATCHING_INTERFACE;
3387 if (table_index != ~0 && pool_is_free_index (cm->tables, table_index))
3388 return VNET_API_ERROR_NO_SUCH_ENTRY;
3390 vec_validate (lm->classify_table_index_by_sw_if_index, sw_if_index);
3391 lm->classify_table_index_by_sw_if_index[sw_if_index] = table_index;
3393 if_addr = ip6_interface_first_address (ipm, sw_if_index);
3395 if (NULL != if_addr)
3397 fib_prefix_t pfx = {
3399 .fp_proto = FIB_PROTOCOL_IP6,
3400 .fp_addr.ip6 = *if_addr,
3404 fib_index = fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4,
3408 if (table_index != (u32) ~ 0)
3410 dpo_id_t dpo = DPO_INVALID;
3415 classify_dpo_create (DPO_PROTO_IP6, table_index));
3417 fib_table_entry_special_dpo_add (fib_index,
3419 FIB_SOURCE_CLASSIFY,
3420 FIB_ENTRY_FLAG_NONE, &dpo);
3425 fib_table_entry_special_remove (fib_index,
3426 &pfx, FIB_SOURCE_CLASSIFY);
3433 static clib_error_t *
3434 set_ip6_classify_command_fn (vlib_main_t * vm,
3435 unformat_input_t * input,
3436 vlib_cli_command_t * cmd)
3438 u32 table_index = ~0;
3439 int table_index_set = 0;
3440 u32 sw_if_index = ~0;
3443 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
3445 if (unformat (input, "table-index %d", &table_index))
3446 table_index_set = 1;
3447 else if (unformat (input, "intfc %U", unformat_vnet_sw_interface,
3448 vnet_get_main (), &sw_if_index))
3454 if (table_index_set == 0)
3455 return clib_error_return (0, "classify table-index must be specified");
3457 if (sw_if_index == ~0)
3458 return clib_error_return (0, "interface / subif must be specified");
3460 rv = vnet_set_ip6_classify_intfc (vm, sw_if_index, table_index);
3467 case VNET_API_ERROR_NO_MATCHING_INTERFACE:
3468 return clib_error_return (0, "No such interface");
3470 case VNET_API_ERROR_NO_SUCH_ENTRY:
3471 return clib_error_return (0, "No such classifier table");
3477 * Assign a classification table to an interface. The classification
3478 * table is created using the '<em>classify table</em>' and '<em>classify session</em>'
3479 * commands. Once the table is create, use this command to filter packets
3483 * Example of how to assign a classification table to an interface:
3484 * @cliexcmd{set ip6 classify intfc GigabitEthernet2/0/0 table-index 1}
3487 VLIB_CLI_COMMAND (set_ip6_classify_command, static) =
3489 .path = "set ip6 classify",
3491 "set ip6 classify intfc <interface> table-index <classify-idx>",
3492 .function = set_ip6_classify_command_fn,
3496 static clib_error_t *
3497 ip6_config (vlib_main_t * vm, unformat_input_t * input)
3499 ip6_main_t *im = &ip6_main;
3504 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
3506 if (unformat (input, "hash-buckets %d", &tmp))
3508 else if (unformat (input, "heap-size %dm", &tmp))
3509 heapsize = ((u64) tmp) << 20;
3510 else if (unformat (input, "heap-size %dM", &tmp))
3511 heapsize = ((u64) tmp) << 20;
3512 else if (unformat (input, "heap-size %dg", &tmp))
3513 heapsize = ((u64) tmp) << 30;
3514 else if (unformat (input, "heap-size %dG", &tmp))
3515 heapsize = ((u64) tmp) << 30;
3517 return clib_error_return (0, "unknown input '%U'",
3518 format_unformat_error, input);
3521 im->lookup_table_nbuckets = nbuckets;
3522 im->lookup_table_size = heapsize;
3527 VLIB_EARLY_CONFIG_FUNCTION (ip6_config, "ip6");
3530 * fd.io coding-style-patch-verification: ON
3533 * eval: (c-set-style "gnu")