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.
66 ip6_lookup_inline (vlib_main_t * vm,
67 vlib_node_runtime_t * node, vlib_frame_t * frame)
69 ip6_main_t *im = &ip6_main;
70 vlib_combined_counter_main_t *cm = &load_balance_main.lbm_to_counters;
71 u32 n_left_from, n_left_to_next, *from, *to_next;
72 ip_lookup_next_t next;
73 u32 thread_index = vlib_get_thread_index ();
75 from = vlib_frame_vector_args (frame);
76 n_left_from = frame->n_vectors;
77 next = node->cached_next_index;
79 while (n_left_from > 0)
81 vlib_get_next_frame (vm, node, next, to_next, n_left_to_next);
83 while (n_left_from >= 4 && n_left_to_next >= 2)
85 vlib_buffer_t *p0, *p1;
86 u32 pi0, pi1, lbi0, lbi1, wrong_next;
87 ip_lookup_next_t next0, next1;
88 ip6_header_t *ip0, *ip1;
89 ip6_address_t *dst_addr0, *dst_addr1;
90 u32 fib_index0, fib_index1;
91 u32 flow_hash_config0, flow_hash_config1;
92 const dpo_id_t *dpo0, *dpo1;
93 const load_balance_t *lb0, *lb1;
95 /* Prefetch next iteration. */
97 vlib_buffer_t *p2, *p3;
99 p2 = vlib_get_buffer (vm, from[2]);
100 p3 = vlib_get_buffer (vm, from[3]);
102 vlib_prefetch_buffer_header (p2, LOAD);
103 vlib_prefetch_buffer_header (p3, LOAD);
104 CLIB_PREFETCH (p2->data, sizeof (ip0[0]), LOAD);
105 CLIB_PREFETCH (p3->data, sizeof (ip0[0]), LOAD);
108 pi0 = to_next[0] = from[0];
109 pi1 = to_next[1] = from[1];
111 p0 = vlib_get_buffer (vm, pi0);
112 p1 = vlib_get_buffer (vm, pi1);
114 ip0 = vlib_buffer_get_current (p0);
115 ip1 = vlib_buffer_get_current (p1);
117 dst_addr0 = &ip0->dst_address;
118 dst_addr1 = &ip1->dst_address;
121 vec_elt (im->fib_index_by_sw_if_index,
122 vnet_buffer (p0)->sw_if_index[VLIB_RX]);
124 vec_elt (im->fib_index_by_sw_if_index,
125 vnet_buffer (p1)->sw_if_index[VLIB_RX]);
127 fib_index0 = (vnet_buffer (p0)->sw_if_index[VLIB_TX] == (u32) ~ 0) ?
128 fib_index0 : vnet_buffer (p0)->sw_if_index[VLIB_TX];
129 fib_index1 = (vnet_buffer (p1)->sw_if_index[VLIB_TX] == (u32) ~ 0) ?
130 fib_index1 : vnet_buffer (p1)->sw_if_index[VLIB_TX];
132 lbi0 = ip6_fib_table_fwding_lookup (im, fib_index0, dst_addr0);
133 lbi1 = ip6_fib_table_fwding_lookup (im, fib_index1, dst_addr1);
135 lb0 = load_balance_get (lbi0);
136 lb1 = load_balance_get (lbi1);
137 ASSERT (lb0->lb_n_buckets > 0);
138 ASSERT (lb1->lb_n_buckets > 0);
139 ASSERT (is_pow2 (lb0->lb_n_buckets));
140 ASSERT (is_pow2 (lb1->lb_n_buckets));
142 vnet_buffer (p0)->ip.flow_hash = vnet_buffer (p1)->ip.flow_hash = 0;
144 if (PREDICT_FALSE (lb0->lb_n_buckets > 1))
146 flow_hash_config0 = lb0->lb_hash_config;
147 vnet_buffer (p0)->ip.flow_hash =
148 ip6_compute_flow_hash (ip0, flow_hash_config0);
150 load_balance_get_fwd_bucket (lb0,
151 (vnet_buffer (p0)->ip.flow_hash &
152 (lb0->lb_n_buckets_minus_1)));
156 dpo0 = load_balance_get_bucket_i (lb0, 0);
158 if (PREDICT_FALSE (lb1->lb_n_buckets > 1))
160 flow_hash_config1 = lb1->lb_hash_config;
161 vnet_buffer (p1)->ip.flow_hash =
162 ip6_compute_flow_hash (ip1, flow_hash_config1);
164 load_balance_get_fwd_bucket (lb1,
165 (vnet_buffer (p1)->ip.flow_hash &
166 (lb1->lb_n_buckets_minus_1)));
170 dpo1 = load_balance_get_bucket_i (lb1, 0);
172 next0 = dpo0->dpoi_next_node;
173 next1 = dpo1->dpoi_next_node;
175 /* Only process the HBH Option Header if explicitly configured to do so */
177 (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
179 next0 = (dpo_is_adj (dpo0) && im->hbh_enabled) ?
180 (ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next0;
183 (ip1->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
185 next1 = (dpo_is_adj (dpo1) && im->hbh_enabled) ?
186 (ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next1;
188 vnet_buffer (p0)->ip.adj_index[VLIB_TX] = dpo0->dpoi_index;
189 vnet_buffer (p1)->ip.adj_index[VLIB_TX] = dpo1->dpoi_index;
191 vlib_increment_combined_counter
192 (cm, thread_index, lbi0, 1, vlib_buffer_length_in_chain (vm, p0));
193 vlib_increment_combined_counter
194 (cm, thread_index, lbi1, 1, vlib_buffer_length_in_chain (vm, p1));
201 wrong_next = (next0 != next) + 2 * (next1 != next);
202 if (PREDICT_FALSE (wrong_next != 0))
211 vlib_set_next_frame_buffer (vm, node, next0, pi0);
218 vlib_set_next_frame_buffer (vm, node, next1, pi1);
225 vlib_set_next_frame_buffer (vm, node, next0, pi0);
226 vlib_set_next_frame_buffer (vm, node, next1, pi1);
230 vlib_put_next_frame (vm, node, next, n_left_to_next);
232 vlib_get_next_frame (vm, node, next, to_next,
239 while (n_left_from > 0 && n_left_to_next > 0)
244 ip_lookup_next_t next0;
246 ip6_address_t *dst_addr0;
247 u32 fib_index0, flow_hash_config0;
248 const dpo_id_t *dpo0;
253 p0 = vlib_get_buffer (vm, pi0);
255 ip0 = vlib_buffer_get_current (p0);
257 dst_addr0 = &ip0->dst_address;
260 vec_elt (im->fib_index_by_sw_if_index,
261 vnet_buffer (p0)->sw_if_index[VLIB_RX]);
263 (vnet_buffer (p0)->sw_if_index[VLIB_TX] ==
264 (u32) ~ 0) ? fib_index0 : vnet_buffer (p0)->sw_if_index[VLIB_TX];
266 lbi0 = ip6_fib_table_fwding_lookup (im, fib_index0, dst_addr0);
268 lb0 = load_balance_get (lbi0);
269 flow_hash_config0 = lb0->lb_hash_config;
271 vnet_buffer (p0)->ip.flow_hash = 0;
272 ASSERT (lb0->lb_n_buckets > 0);
273 ASSERT (is_pow2 (lb0->lb_n_buckets));
275 if (PREDICT_FALSE (lb0->lb_n_buckets > 1))
277 flow_hash_config0 = lb0->lb_hash_config;
278 vnet_buffer (p0)->ip.flow_hash =
279 ip6_compute_flow_hash (ip0, flow_hash_config0);
281 load_balance_get_fwd_bucket (lb0,
282 (vnet_buffer (p0)->ip.flow_hash &
283 (lb0->lb_n_buckets_minus_1)));
287 dpo0 = load_balance_get_bucket_i (lb0, 0);
290 dpo0 = load_balance_get_bucket_i (lb0,
291 (vnet_buffer (p0)->ip.flow_hash &
292 lb0->lb_n_buckets_minus_1));
293 next0 = dpo0->dpoi_next_node;
295 /* Only process the HBH Option Header if explicitly configured to do so */
297 (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
299 next0 = (dpo_is_adj (dpo0) && im->hbh_enabled) ?
300 (ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next0;
302 vnet_buffer (p0)->ip.adj_index[VLIB_TX] = dpo0->dpoi_index;
304 vlib_increment_combined_counter
305 (cm, thread_index, lbi0, 1, vlib_buffer_length_in_chain (vm, p0));
312 if (PREDICT_FALSE (next0 != next))
315 vlib_put_next_frame (vm, node, next, n_left_to_next);
317 vlib_get_next_frame (vm, node, next, to_next, n_left_to_next);
324 vlib_put_next_frame (vm, node, next, n_left_to_next);
327 if (node->flags & VLIB_NODE_FLAG_TRACE)
328 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
330 return frame->n_vectors;
334 ip6_add_interface_routes (vnet_main_t * vnm, u32 sw_if_index,
335 ip6_main_t * im, u32 fib_index,
336 ip_interface_address_t * a)
338 ip_lookup_main_t *lm = &im->lookup_main;
339 ip6_address_t *address = ip_interface_address_get_address (lm, a);
341 .fp_len = a->address_length,
342 .fp_proto = FIB_PROTOCOL_IP6,
343 .fp_addr.ip6 = *address,
346 if (a->address_length < 128)
348 fib_table_entry_update_one_path (fib_index,
350 FIB_SOURCE_INTERFACE,
351 (FIB_ENTRY_FLAG_CONNECTED |
352 FIB_ENTRY_FLAG_ATTACHED),
354 /* No next-hop address */
356 /* invalid FIB index */
359 NULL, FIB_ROUTE_PATH_FLAG_NONE);
363 if (sw_if_index < vec_len (lm->classify_table_index_by_sw_if_index))
365 u32 classify_table_index =
366 lm->classify_table_index_by_sw_if_index[sw_if_index];
367 if (classify_table_index != (u32) ~ 0)
369 dpo_id_t dpo = DPO_INVALID;
374 classify_dpo_create (DPO_PROTO_IP6, classify_table_index));
376 fib_table_entry_special_dpo_add (fib_index,
379 FIB_ENTRY_FLAG_NONE, &dpo);
384 fib_table_entry_update_one_path (fib_index, &pfx,
385 FIB_SOURCE_INTERFACE,
386 (FIB_ENTRY_FLAG_CONNECTED |
387 FIB_ENTRY_FLAG_LOCAL),
391 1, NULL, FIB_ROUTE_PATH_FLAG_NONE);
395 ip6_del_interface_routes (ip6_main_t * im,
397 ip6_address_t * address, u32 address_length)
400 .fp_len = address_length,
401 .fp_proto = FIB_PROTOCOL_IP6,
402 .fp_addr.ip6 = *address,
405 if (pfx.fp_len < 128)
407 fib_table_entry_delete (fib_index, &pfx, FIB_SOURCE_INTERFACE);
412 fib_table_entry_delete (fib_index, &pfx, FIB_SOURCE_INTERFACE);
416 ip6_sw_interface_enable_disable (u32 sw_if_index, u32 is_enable)
418 ip6_main_t *im = &ip6_main;
420 vec_validate_init_empty (im->ip_enabled_by_sw_if_index, sw_if_index, 0);
423 * enable/disable only on the 1<->0 transition
427 if (1 != ++im->ip_enabled_by_sw_if_index[sw_if_index])
432 /* The ref count is 0 when an address is removed from an interface that has
433 * no address - this is not a ciritical error */
434 if (0 == im->ip_enabled_by_sw_if_index[sw_if_index] ||
435 0 != --im->ip_enabled_by_sw_if_index[sw_if_index])
439 vnet_feature_enable_disable ("ip6-unicast", "ip6-drop", sw_if_index,
442 vnet_feature_enable_disable ("ip6-multicast", "ip6-drop", sw_if_index,
446 /* get first interface address */
448 ip6_interface_first_address (ip6_main_t * im, u32 sw_if_index)
450 ip_lookup_main_t *lm = &im->lookup_main;
451 ip_interface_address_t *ia = 0;
452 ip6_address_t *result = 0;
455 foreach_ip_interface_address (lm, ia, sw_if_index,
456 1 /* honor unnumbered */,
458 ip6_address_t * a = ip_interface_address_get_address (lm, ia);
467 ip6_add_del_interface_address (vlib_main_t * vm,
469 ip6_address_t * address,
470 u32 address_length, u32 is_del)
472 vnet_main_t *vnm = vnet_get_main ();
473 ip6_main_t *im = &ip6_main;
474 ip_lookup_main_t *lm = &im->lookup_main;
476 u32 if_address_index;
477 ip6_address_fib_t ip6_af, *addr_fib = 0;
479 /* local0 interface doesn't support IP addressing */
480 if (sw_if_index == 0)
483 clib_error_create ("local0 interface doesn't support IP addressing");
486 vec_validate (im->fib_index_by_sw_if_index, sw_if_index);
487 vec_validate (im->mfib_index_by_sw_if_index, sw_if_index);
489 ip6_addr_fib_init (&ip6_af, address,
490 vec_elt (im->fib_index_by_sw_if_index, sw_if_index));
491 vec_add1 (addr_fib, ip6_af);
494 uword elts_before = pool_elts (lm->if_address_pool);
496 error = ip_interface_address_add_del
497 (lm, sw_if_index, addr_fib, address_length, is_del, &if_address_index);
501 /* Pool did not grow: add duplicate address. */
502 if (elts_before == pool_elts (lm->if_address_pool))
506 ip6_sw_interface_enable_disable (sw_if_index, !is_del);
509 ip6_del_interface_routes (im, ip6_af.fib_index, address, address_length);
511 ip6_add_interface_routes (vnm, sw_if_index,
512 im, ip6_af.fib_index,
513 pool_elt_at_index (lm->if_address_pool,
517 ip6_add_del_interface_address_callback_t *cb;
518 vec_foreach (cb, im->add_del_interface_address_callbacks)
519 cb->function (im, cb->function_opaque, sw_if_index,
520 address, address_length, if_address_index, is_del);
529 ip6_sw_interface_admin_up_down (vnet_main_t * vnm, u32 sw_if_index, u32 flags)
531 ip6_main_t *im = &ip6_main;
532 ip_interface_address_t *ia;
534 u32 is_admin_up, fib_index;
536 /* Fill in lookup tables with default table (0). */
537 vec_validate (im->fib_index_by_sw_if_index, sw_if_index);
539 vec_validate_init_empty (im->
540 lookup_main.if_address_pool_index_by_sw_if_index,
543 is_admin_up = (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) != 0;
545 fib_index = vec_elt (im->fib_index_by_sw_if_index, sw_if_index);
548 foreach_ip_interface_address (&im->lookup_main, ia, sw_if_index,
549 0 /* honor unnumbered */,
551 a = ip_interface_address_get_address (&im->lookup_main, ia);
553 ip6_add_interface_routes (vnm, sw_if_index,
557 ip6_del_interface_routes (im, fib_index,
558 a, ia->address_length);
565 VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION (ip6_sw_interface_admin_up_down);
567 /* Built-in ip6 unicast rx feature path definition */
569 VNET_FEATURE_ARC_INIT (ip6_unicast, static) =
571 .arc_name = "ip6-unicast",
572 .start_nodes = VNET_FEATURES ("ip6-input"),
573 .arc_index_ptr = &ip6_main.lookup_main.ucast_feature_arc_index,
576 VNET_FEATURE_INIT (ip6_flow_classify, static) =
578 .arc_name = "ip6-unicast",
579 .node_name = "ip6-flow-classify",
580 .runs_before = VNET_FEATURES ("ip6-inacl"),
583 VNET_FEATURE_INIT (ip6_inacl, static) =
585 .arc_name = "ip6-unicast",
586 .node_name = "ip6-inacl",
587 .runs_before = VNET_FEATURES ("ip6-policer-classify"),
590 VNET_FEATURE_INIT (ip6_policer_classify, static) =
592 .arc_name = "ip6-unicast",
593 .node_name = "ip6-policer-classify",
594 .runs_before = VNET_FEATURES ("ipsec-input-ip6"),
597 VNET_FEATURE_INIT (ip6_ipsec, static) =
599 .arc_name = "ip6-unicast",
600 .node_name = "ipsec-input-ip6",
601 .runs_before = VNET_FEATURES ("l2tp-decap"),
604 VNET_FEATURE_INIT (ip6_l2tp, static) =
606 .arc_name = "ip6-unicast",
607 .node_name = "l2tp-decap",
608 .runs_before = VNET_FEATURES ("vpath-input-ip6"),
611 VNET_FEATURE_INIT (ip6_vpath, static) =
613 .arc_name = "ip6-unicast",
614 .node_name = "vpath-input-ip6",
615 .runs_before = VNET_FEATURES ("ip6-vxlan-bypass"),
618 VNET_FEATURE_INIT (ip6_vxlan_bypass, static) =
620 .arc_name = "ip6-unicast",
621 .node_name = "ip6-vxlan-bypass",
622 .runs_before = VNET_FEATURES ("ip6-lookup"),
625 VNET_FEATURE_INIT (ip6_drop, static) =
627 .arc_name = "ip6-unicast",
628 .node_name = "ip6-drop",
629 .runs_before = VNET_FEATURES ("ip6-lookup"),
632 VNET_FEATURE_INIT (ip6_lookup, static) =
634 .arc_name = "ip6-unicast",
635 .node_name = "ip6-lookup",
636 .runs_before = 0, /*last feature*/
639 /* Built-in ip6 multicast rx feature path definition (none now) */
640 VNET_FEATURE_ARC_INIT (ip6_multicast, static) =
642 .arc_name = "ip6-multicast",
643 .start_nodes = VNET_FEATURES ("ip6-input"),
644 .arc_index_ptr = &ip6_main.lookup_main.mcast_feature_arc_index,
647 VNET_FEATURE_INIT (ip6_vpath_mc, static) = {
648 .arc_name = "ip6-multicast",
649 .node_name = "vpath-input-ip6",
650 .runs_before = VNET_FEATURES ("ip6-mfib-forward-lookup"),
653 VNET_FEATURE_INIT (ip6_drop_mc, static) = {
654 .arc_name = "ip6-multicast",
655 .node_name = "ip6-drop",
656 .runs_before = VNET_FEATURES ("ip6-mfib-forward-lookup"),
659 VNET_FEATURE_INIT (ip6_mc_lookup, static) = {
660 .arc_name = "ip6-multicast",
661 .node_name = "ip6-mfib-forward-lookup",
662 .runs_before = 0, /* last feature */
665 /* Built-in ip4 tx feature path definition */
666 VNET_FEATURE_ARC_INIT (ip6_output, static) =
668 .arc_name = "ip6-output",
669 .start_nodes = VNET_FEATURES ("ip6-rewrite", "ip6-midchain"),
670 .arc_index_ptr = &ip6_main.lookup_main.output_feature_arc_index,
673 VNET_FEATURE_INIT (ip6_ipsec_output, static) = {
674 .arc_name = "ip6-output",
675 .node_name = "ipsec-output-ip6",
676 .runs_before = VNET_FEATURES ("interface-output"),
679 VNET_FEATURE_INIT (ip6_interface_output, static) = {
680 .arc_name = "ip6-output",
681 .node_name = "interface-output",
682 .runs_before = 0, /* not before any other features */
687 ip6_sw_interface_add_del (vnet_main_t * vnm, u32 sw_if_index, u32 is_add)
689 ip6_main_t *im = &ip6_main;
691 vec_validate (im->fib_index_by_sw_if_index, sw_if_index);
692 vec_validate (im->mfib_index_by_sw_if_index, sw_if_index);
696 /* Ensure that IPv6 is disabled */
697 ip6_main_t *im6 = &ip6_main;
698 ip_lookup_main_t *lm6 = &im6->lookup_main;
699 ip_interface_address_t *ia = 0;
700 ip6_address_t *address;
701 vlib_main_t *vm = vlib_get_main ();
703 ip6_neighbor_sw_interface_add_del (vnm, sw_if_index, 0 /* is_add */ );
705 foreach_ip_interface_address (lm6, ia, sw_if_index, 1 /* honor unnumbered */,
707 address = ip_interface_address_get_address (lm6, ia);
708 ip6_add_del_interface_address(vm, sw_if_index, address, ia->address_length, 1);
711 ip6_mfib_interface_enable_disable (sw_if_index, 0);
714 vnet_feature_enable_disable ("ip6-unicast", "ip6-drop", sw_if_index,
717 vnet_feature_enable_disable ("ip6-multicast", "ip6-drop", sw_if_index,
720 return /* no error */ 0;
723 VNET_SW_INTERFACE_ADD_DEL_FUNCTION (ip6_sw_interface_add_del);
726 ip6_lookup (vlib_main_t * vm,
727 vlib_node_runtime_t * node, vlib_frame_t * frame)
729 return ip6_lookup_inline (vm, node, frame);
732 static u8 *format_ip6_lookup_trace (u8 * s, va_list * args);
735 VLIB_REGISTER_NODE (ip6_lookup_node) =
737 .function = ip6_lookup,
738 .name = "ip6-lookup",
739 .vector_size = sizeof (u32),
740 .format_trace = format_ip6_lookup_trace,
741 .n_next_nodes = IP6_LOOKUP_N_NEXT,
742 .next_nodes = IP6_LOOKUP_NEXT_NODES,
746 VLIB_NODE_FUNCTION_MULTIARCH (ip6_lookup_node, ip6_lookup);
749 ip6_load_balance (vlib_main_t * vm,
750 vlib_node_runtime_t * node, vlib_frame_t * frame)
752 vlib_combined_counter_main_t *cm = &load_balance_main.lbm_via_counters;
753 u32 n_left_from, n_left_to_next, *from, *to_next;
754 ip_lookup_next_t next;
755 u32 thread_index = vlib_get_thread_index ();
756 ip6_main_t *im = &ip6_main;
758 from = vlib_frame_vector_args (frame);
759 n_left_from = frame->n_vectors;
760 next = node->cached_next_index;
762 if (node->flags & VLIB_NODE_FLAG_TRACE)
763 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
765 while (n_left_from > 0)
767 vlib_get_next_frame (vm, node, next, to_next, n_left_to_next);
770 while (n_left_from >= 4 && n_left_to_next >= 2)
772 ip_lookup_next_t next0, next1;
773 const load_balance_t *lb0, *lb1;
774 vlib_buffer_t *p0, *p1;
775 u32 pi0, lbi0, hc0, pi1, lbi1, hc1;
776 const ip6_header_t *ip0, *ip1;
777 const dpo_id_t *dpo0, *dpo1;
779 /* Prefetch next iteration. */
781 vlib_buffer_t *p2, *p3;
783 p2 = vlib_get_buffer (vm, from[2]);
784 p3 = vlib_get_buffer (vm, from[3]);
786 vlib_prefetch_buffer_header (p2, STORE);
787 vlib_prefetch_buffer_header (p3, STORE);
789 CLIB_PREFETCH (p2->data, sizeof (ip0[0]), STORE);
790 CLIB_PREFETCH (p3->data, sizeof (ip0[0]), STORE);
793 pi0 = to_next[0] = from[0];
794 pi1 = to_next[1] = from[1];
801 p0 = vlib_get_buffer (vm, pi0);
802 p1 = vlib_get_buffer (vm, pi1);
804 ip0 = vlib_buffer_get_current (p0);
805 ip1 = vlib_buffer_get_current (p1);
806 lbi0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
807 lbi1 = vnet_buffer (p1)->ip.adj_index[VLIB_TX];
809 lb0 = load_balance_get (lbi0);
810 lb1 = load_balance_get (lbi1);
813 * this node is for via FIBs we can re-use the hash value from the
814 * to node if present.
815 * We don't want to use the same hash value at each level in the recursion
816 * graph as that would lead to polarisation
820 if (PREDICT_FALSE (lb0->lb_n_buckets > 1))
822 if (PREDICT_TRUE (vnet_buffer (p0)->ip.flow_hash))
824 hc0 = vnet_buffer (p0)->ip.flow_hash =
825 vnet_buffer (p0)->ip.flow_hash >> 1;
829 hc0 = vnet_buffer (p0)->ip.flow_hash =
830 ip6_compute_flow_hash (ip0, lb0->lb_hash_config);
833 load_balance_get_fwd_bucket (lb0,
835 lb0->lb_n_buckets_minus_1));
839 dpo0 = load_balance_get_bucket_i (lb0, 0);
841 if (PREDICT_FALSE (lb1->lb_n_buckets > 1))
843 if (PREDICT_TRUE (vnet_buffer (p1)->ip.flow_hash))
845 hc1 = vnet_buffer (p1)->ip.flow_hash =
846 vnet_buffer (p1)->ip.flow_hash >> 1;
850 hc1 = vnet_buffer (p1)->ip.flow_hash =
851 ip6_compute_flow_hash (ip1, lb1->lb_hash_config);
854 load_balance_get_fwd_bucket (lb1,
856 lb1->lb_n_buckets_minus_1));
860 dpo1 = load_balance_get_bucket_i (lb1, 0);
863 next0 = dpo0->dpoi_next_node;
864 next1 = dpo1->dpoi_next_node;
866 /* Only process the HBH Option Header if explicitly configured to do so */
868 (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
870 next0 = (dpo_is_adj (dpo0) && im->hbh_enabled) ?
871 (ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next0;
873 /* Only process the HBH Option Header if explicitly configured to do so */
875 (ip1->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
877 next1 = (dpo_is_adj (dpo1) && im->hbh_enabled) ?
878 (ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next1;
881 vnet_buffer (p0)->ip.adj_index[VLIB_TX] = dpo0->dpoi_index;
882 vnet_buffer (p1)->ip.adj_index[VLIB_TX] = dpo1->dpoi_index;
884 vlib_increment_combined_counter
885 (cm, thread_index, lbi0, 1, vlib_buffer_length_in_chain (vm, p0));
886 vlib_increment_combined_counter
887 (cm, thread_index, lbi1, 1, vlib_buffer_length_in_chain (vm, p1));
889 vlib_validate_buffer_enqueue_x2 (vm, node, next,
890 to_next, n_left_to_next,
891 pi0, pi1, next0, next1);
894 while (n_left_from > 0 && n_left_to_next > 0)
896 ip_lookup_next_t next0;
897 const load_balance_t *lb0;
900 const ip6_header_t *ip0;
901 const dpo_id_t *dpo0;
910 p0 = vlib_get_buffer (vm, pi0);
912 ip0 = vlib_buffer_get_current (p0);
913 lbi0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
915 lb0 = load_balance_get (lbi0);
918 if (PREDICT_FALSE (lb0->lb_n_buckets > 1))
920 if (PREDICT_TRUE (vnet_buffer (p0)->ip.flow_hash))
922 hc0 = vnet_buffer (p0)->ip.flow_hash =
923 vnet_buffer (p0)->ip.flow_hash >> 1;
927 hc0 = vnet_buffer (p0)->ip.flow_hash =
928 ip6_compute_flow_hash (ip0, lb0->lb_hash_config);
931 load_balance_get_fwd_bucket (lb0,
933 lb0->lb_n_buckets_minus_1));
937 dpo0 = load_balance_get_bucket_i (lb0, 0);
940 next0 = dpo0->dpoi_next_node;
941 vnet_buffer (p0)->ip.adj_index[VLIB_TX] = dpo0->dpoi_index;
943 /* Only process the HBH Option Header if explicitly configured to do so */
945 (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
947 next0 = (dpo_is_adj (dpo0) && im->hbh_enabled) ?
948 (ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next0;
951 vlib_increment_combined_counter
952 (cm, thread_index, lbi0, 1, vlib_buffer_length_in_chain (vm, p0));
954 vlib_validate_buffer_enqueue_x1 (vm, node, next,
955 to_next, n_left_to_next,
959 vlib_put_next_frame (vm, node, next, n_left_to_next);
962 return frame->n_vectors;
966 VLIB_REGISTER_NODE (ip6_load_balance_node) =
968 .function = ip6_load_balance,
969 .name = "ip6-load-balance",
970 .vector_size = sizeof (u32),
971 .sibling_of = "ip6-lookup",
972 .format_trace = format_ip6_lookup_trace,
976 VLIB_NODE_FUNCTION_MULTIARCH (ip6_load_balance_node, ip6_load_balance);
980 /* Adjacency taken. */
985 /* Packet data, possibly *after* rewrite. */
986 u8 packet_data[128 - 1 * sizeof (u32)];
988 ip6_forward_next_trace_t;
991 format_ip6_forward_next_trace (u8 * s, va_list * args)
993 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
994 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
995 ip6_forward_next_trace_t *t = va_arg (*args, ip6_forward_next_trace_t *);
996 u32 indent = format_get_indent (s);
998 s = format (s, "%U%U",
999 format_white_space, indent,
1000 format_ip6_header, t->packet_data, sizeof (t->packet_data));
1005 format_ip6_lookup_trace (u8 * s, va_list * args)
1007 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
1008 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
1009 ip6_forward_next_trace_t *t = va_arg (*args, ip6_forward_next_trace_t *);
1010 u32 indent = format_get_indent (s);
1012 s = format (s, "fib %d dpo-idx %d flow hash: 0x%08x",
1013 t->fib_index, t->adj_index, t->flow_hash);
1014 s = format (s, "\n%U%U",
1015 format_white_space, indent,
1016 format_ip6_header, t->packet_data, sizeof (t->packet_data));
1022 format_ip6_rewrite_trace (u8 * s, va_list * args)
1024 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
1025 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
1026 ip6_forward_next_trace_t *t = va_arg (*args, ip6_forward_next_trace_t *);
1027 u32 indent = format_get_indent (s);
1029 s = format (s, "tx_sw_if_index %d adj-idx %d : %U flow hash: 0x%08x",
1030 t->fib_index, t->adj_index, format_ip_adjacency,
1031 t->adj_index, FORMAT_IP_ADJACENCY_NONE, t->flow_hash);
1032 s = format (s, "\n%U%U",
1033 format_white_space, indent,
1034 format_ip_adjacency_packet_data,
1035 t->adj_index, t->packet_data, sizeof (t->packet_data));
1039 /* Common trace function for all ip6-forward next nodes. */
1041 ip6_forward_next_trace (vlib_main_t * vm,
1042 vlib_node_runtime_t * node,
1043 vlib_frame_t * frame, vlib_rx_or_tx_t which_adj_index)
1046 ip6_main_t *im = &ip6_main;
1048 n_left = frame->n_vectors;
1049 from = vlib_frame_vector_args (frame);
1054 vlib_buffer_t *b0, *b1;
1055 ip6_forward_next_trace_t *t0, *t1;
1057 /* Prefetch next iteration. */
1058 vlib_prefetch_buffer_with_index (vm, from[2], LOAD);
1059 vlib_prefetch_buffer_with_index (vm, from[3], LOAD);
1064 b0 = vlib_get_buffer (vm, bi0);
1065 b1 = vlib_get_buffer (vm, bi1);
1067 if (b0->flags & VLIB_BUFFER_IS_TRACED)
1069 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
1070 t0->adj_index = vnet_buffer (b0)->ip.adj_index[which_adj_index];
1071 t0->flow_hash = vnet_buffer (b0)->ip.flow_hash;
1073 (vnet_buffer (b0)->sw_if_index[VLIB_TX] !=
1074 (u32) ~ 0) ? vnet_buffer (b0)->sw_if_index[VLIB_TX] :
1075 vec_elt (im->fib_index_by_sw_if_index,
1076 vnet_buffer (b0)->sw_if_index[VLIB_RX]);
1078 clib_memcpy (t0->packet_data,
1079 vlib_buffer_get_current (b0),
1080 sizeof (t0->packet_data));
1082 if (b1->flags & VLIB_BUFFER_IS_TRACED)
1084 t1 = vlib_add_trace (vm, node, b1, sizeof (t1[0]));
1085 t1->adj_index = vnet_buffer (b1)->ip.adj_index[which_adj_index];
1086 t1->flow_hash = vnet_buffer (b1)->ip.flow_hash;
1088 (vnet_buffer (b1)->sw_if_index[VLIB_TX] !=
1089 (u32) ~ 0) ? vnet_buffer (b1)->sw_if_index[VLIB_TX] :
1090 vec_elt (im->fib_index_by_sw_if_index,
1091 vnet_buffer (b1)->sw_if_index[VLIB_RX]);
1093 clib_memcpy (t1->packet_data,
1094 vlib_buffer_get_current (b1),
1095 sizeof (t1->packet_data));
1105 ip6_forward_next_trace_t *t0;
1109 b0 = vlib_get_buffer (vm, bi0);
1111 if (b0->flags & VLIB_BUFFER_IS_TRACED)
1113 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
1114 t0->adj_index = vnet_buffer (b0)->ip.adj_index[which_adj_index];
1115 t0->flow_hash = vnet_buffer (b0)->ip.flow_hash;
1117 (vnet_buffer (b0)->sw_if_index[VLIB_TX] !=
1118 (u32) ~ 0) ? vnet_buffer (b0)->sw_if_index[VLIB_TX] :
1119 vec_elt (im->fib_index_by_sw_if_index,
1120 vnet_buffer (b0)->sw_if_index[VLIB_RX]);
1122 clib_memcpy (t0->packet_data,
1123 vlib_buffer_get_current (b0),
1124 sizeof (t0->packet_data));
1131 /* Compute TCP/UDP/ICMP6 checksum in software. */
1133 ip6_tcp_udp_icmp_compute_checksum (vlib_main_t * vm, vlib_buffer_t * p0,
1134 ip6_header_t * ip0, int *bogus_lengthp)
1137 u16 sum16, payload_length_host_byte_order;
1138 u32 i, n_this_buffer, n_bytes_left;
1139 u32 headers_size = sizeof (ip0[0]);
1140 void *data_this_buffer;
1142 ASSERT (bogus_lengthp);
1145 /* Initialize checksum with ip header. */
1146 sum0 = ip0->payload_length + clib_host_to_net_u16 (ip0->protocol);
1147 payload_length_host_byte_order = clib_net_to_host_u16 (ip0->payload_length);
1148 data_this_buffer = (void *) (ip0 + 1);
1150 for (i = 0; i < ARRAY_LEN (ip0->src_address.as_uword); i++)
1152 sum0 = ip_csum_with_carry (sum0,
1153 clib_mem_unaligned (&ip0->
1154 src_address.as_uword[i],
1157 ip_csum_with_carry (sum0,
1158 clib_mem_unaligned (&ip0->dst_address.as_uword[i],
1162 /* some icmp packets may come with a "router alert" hop-by-hop extension header (e.g., mldv2 packets)
1163 * or UDP-Ping packets */
1164 if (PREDICT_FALSE (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
1167 ip6_hop_by_hop_ext_t *ext_hdr =
1168 (ip6_hop_by_hop_ext_t *) data_this_buffer;
1170 /* validate really icmp6 next */
1171 ASSERT ((ext_hdr->next_hdr == IP_PROTOCOL_ICMP6)
1172 || (ext_hdr->next_hdr == IP_PROTOCOL_UDP));
1174 skip_bytes = 8 * (1 + ext_hdr->n_data_u64s);
1175 data_this_buffer = (void *) ((u8 *) data_this_buffer + skip_bytes);
1177 payload_length_host_byte_order -= skip_bytes;
1178 headers_size += skip_bytes;
1181 n_bytes_left = n_this_buffer = payload_length_host_byte_order;
1182 if (p0 && n_this_buffer + headers_size > p0->current_length)
1184 p0->current_length >
1185 headers_size ? p0->current_length - headers_size : 0;
1188 sum0 = ip_incremental_checksum (sum0, data_this_buffer, n_this_buffer);
1189 n_bytes_left -= n_this_buffer;
1190 if (n_bytes_left == 0)
1193 if (!(p0->flags & VLIB_BUFFER_NEXT_PRESENT))
1198 p0 = vlib_get_buffer (vm, p0->next_buffer);
1199 data_this_buffer = vlib_buffer_get_current (p0);
1200 n_this_buffer = p0->current_length;
1203 sum16 = ~ip_csum_fold (sum0);
1209 ip6_tcp_udp_icmp_validate_checksum (vlib_main_t * vm, vlib_buffer_t * p0)
1211 ip6_header_t *ip0 = vlib_buffer_get_current (p0);
1216 /* some icmp packets may come with a "router alert" hop-by-hop extension header (e.g., mldv2 packets) */
1217 ASSERT (ip0->protocol == IP_PROTOCOL_TCP
1218 || ip0->protocol == IP_PROTOCOL_ICMP6
1219 || ip0->protocol == IP_PROTOCOL_UDP
1220 || ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS);
1222 udp0 = (void *) (ip0 + 1);
1223 if (ip0->protocol == IP_PROTOCOL_UDP && udp0->checksum == 0)
1225 p0->flags |= (VNET_BUFFER_F_L4_CHECKSUM_COMPUTED
1226 | VNET_BUFFER_F_L4_CHECKSUM_CORRECT);
1230 sum16 = ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip0, &bogus_length);
1232 p0->flags |= (VNET_BUFFER_F_L4_CHECKSUM_COMPUTED
1233 | ((sum16 == 0) << VNET_BUFFER_F_LOG2_L4_CHECKSUM_CORRECT));
1239 * @brief returns number of links on which src is reachable.
1242 ip6_urpf_loose_check (ip6_main_t * im, vlib_buffer_t * b, ip6_header_t * i)
1244 const load_balance_t *lb0;
1247 lbi = ip6_fib_table_fwding_lookup_with_if_index (im,
1249 (b)->sw_if_index[VLIB_RX],
1252 lb0 = load_balance_get (lbi);
1254 return (fib_urpf_check_size (lb0->lb_urpf));
1258 ip6_next_proto_is_tcp_udp (vlib_buffer_t * p0, ip6_header_t * ip0,
1262 proto0 = ip6_locate_header (p0, ip0, IP_PROTOCOL_UDP, udp_offset0);
1263 if (proto0 != IP_PROTOCOL_UDP)
1265 proto0 = ip6_locate_header (p0, ip0, IP_PROTOCOL_TCP, udp_offset0);
1266 proto0 = (proto0 == IP_PROTOCOL_TCP) ? proto0 : 0;
1272 VNET_FEATURE_ARC_INIT (ip6_local) =
1274 .arc_name = "ip6-local",
1275 .start_nodes = VNET_FEATURES ("ip6-local"),
1280 ip6_local_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
1281 vlib_frame_t * frame, int head_of_feature_arc)
1283 ip6_main_t *im = &ip6_main;
1284 ip_lookup_main_t *lm = &im->lookup_main;
1285 ip_local_next_t next_index;
1286 u32 *from, *to_next, n_left_from, n_left_to_next;
1287 vlib_node_runtime_t *error_node =
1288 vlib_node_get_runtime (vm, ip6_input_node.index);
1289 u8 arc_index = vnet_feat_arc_ip6_local.feature_arc_index;
1291 from = vlib_frame_vector_args (frame);
1292 n_left_from = frame->n_vectors;
1293 next_index = node->cached_next_index;
1295 if (node->flags & VLIB_NODE_FLAG_TRACE)
1296 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
1298 while (n_left_from > 0)
1300 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1302 while (n_left_from >= 4 && n_left_to_next >= 2)
1304 vlib_buffer_t *p0, *p1;
1305 ip6_header_t *ip0, *ip1;
1306 udp_header_t *udp0, *udp1;
1307 u32 pi0, ip_len0, udp_len0, flags0, next0;
1308 u32 pi1, ip_len1, udp_len1, flags1, next1;
1309 i32 len_diff0, len_diff1;
1310 u8 error0, type0, good_l4_csum0, is_tcp_udp0;
1311 u8 error1, type1, good_l4_csum1, is_tcp_udp1;
1312 u32 udp_offset0, udp_offset1;
1314 pi0 = to_next[0] = from[0];
1315 pi1 = to_next[1] = from[1];
1319 n_left_to_next -= 2;
1321 error0 = error1 = IP6_ERROR_UNKNOWN_PROTOCOL;
1323 p0 = vlib_get_buffer (vm, pi0);
1324 p1 = vlib_get_buffer (vm, pi1);
1326 ip0 = vlib_buffer_get_current (p0);
1327 ip1 = vlib_buffer_get_current (p1);
1329 if (head_of_feature_arc == 0)
1332 vnet_buffer (p0)->l3_hdr_offset = p0->current_data;
1333 vnet_buffer (p1)->l3_hdr_offset = p1->current_data;
1335 type0 = lm->builtin_protocol_by_ip_protocol[ip0->protocol];
1336 type1 = lm->builtin_protocol_by_ip_protocol[ip1->protocol];
1341 is_tcp_udp0 = ip6_next_proto_is_tcp_udp (p0, ip0, &udp_offset0);
1342 is_tcp_udp1 = ip6_next_proto_is_tcp_udp (p1, ip1, &udp_offset1);
1344 good_l4_csum0 = (flags0 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0;
1345 good_l4_csum1 = (flags1 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0;
1349 if (PREDICT_TRUE (is_tcp_udp0))
1351 udp0 = (udp_header_t *) ((u8 *) ip0 + udp_offset0);
1352 /* Don't verify UDP checksum for packets with explicit zero checksum. */
1353 good_l4_csum0 |= type0 == IP_BUILTIN_PROTOCOL_UDP
1354 && udp0->checksum == 0;
1355 /* Verify UDP length. */
1356 if (is_tcp_udp0 == IP_PROTOCOL_UDP)
1358 ip_len0 = clib_net_to_host_u16 (ip0->payload_length);
1359 udp_len0 = clib_net_to_host_u16 (udp0->length);
1360 len_diff0 = ip_len0 - udp_len0;
1363 if (PREDICT_TRUE (is_tcp_udp1))
1365 udp1 = (udp_header_t *) ((u8 *) ip1 + udp_offset1);
1366 /* Don't verify UDP checksum for packets with explicit zero checksum. */
1367 good_l4_csum1 |= type1 == IP_BUILTIN_PROTOCOL_UDP
1368 && udp1->checksum == 0;
1369 /* Verify UDP length. */
1370 if (is_tcp_udp1 == IP_PROTOCOL_UDP)
1372 ip_len1 = clib_net_to_host_u16 (ip1->payload_length);
1373 udp_len1 = clib_net_to_host_u16 (udp1->length);
1374 len_diff1 = ip_len1 - udp_len1;
1378 good_l4_csum0 |= type0 == IP_BUILTIN_PROTOCOL_UNKNOWN;
1379 good_l4_csum1 |= type1 == IP_BUILTIN_PROTOCOL_UNKNOWN;
1381 len_diff0 = type0 == IP_BUILTIN_PROTOCOL_UDP ? len_diff0 : 0;
1382 len_diff1 = type1 == IP_BUILTIN_PROTOCOL_UDP ? len_diff1 : 0;
1384 if (PREDICT_FALSE (type0 != IP_BUILTIN_PROTOCOL_UNKNOWN
1387 VNET_BUFFER_F_L4_CHECKSUM_COMPUTED)))
1389 flags0 = ip6_tcp_udp_icmp_validate_checksum (vm, p0);
1391 (flags0 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0;
1393 if (PREDICT_FALSE (type1 != IP_BUILTIN_PROTOCOL_UNKNOWN
1396 VNET_BUFFER_F_L4_CHECKSUM_COMPUTED)))
1398 flags1 = ip6_tcp_udp_icmp_validate_checksum (vm, p1);
1400 (flags1 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0;
1403 error0 = error1 = IP6_ERROR_UNKNOWN_PROTOCOL;
1404 error0 = len_diff0 < 0 ? IP6_ERROR_UDP_LENGTH : error0;
1405 error1 = len_diff1 < 0 ? IP6_ERROR_UDP_LENGTH : error1;
1407 ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_UDP ==
1408 IP6_ERROR_UDP_CHECKSUM);
1409 ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_ICMP ==
1410 IP6_ERROR_ICMP_CHECKSUM);
1411 error0 = (!good_l4_csum0 ? IP6_ERROR_UDP_CHECKSUM + type0 : error0);
1412 error1 = (!good_l4_csum1 ? IP6_ERROR_UDP_CHECKSUM + type1 : error1);
1414 /* Drop packets from unroutable hosts. */
1415 /* If this is a neighbor solicitation (ICMP), skip source RPF check */
1416 if (error0 == IP6_ERROR_UNKNOWN_PROTOCOL &&
1417 type0 != IP_BUILTIN_PROTOCOL_ICMP &&
1418 !ip6_address_is_link_local_unicast (&ip0->src_address))
1420 error0 = (!ip6_urpf_loose_check (im, p0, ip0)
1421 ? IP6_ERROR_SRC_LOOKUP_MISS : error0);
1423 if (error1 == IP6_ERROR_UNKNOWN_PROTOCOL &&
1424 type1 != IP_BUILTIN_PROTOCOL_ICMP &&
1425 !ip6_address_is_link_local_unicast (&ip1->src_address))
1427 error1 = (!ip6_urpf_loose_check (im, p1, ip1)
1428 ? IP6_ERROR_SRC_LOOKUP_MISS : error1);
1433 next0 = lm->local_next_by_ip_protocol[ip0->protocol];
1434 next1 = lm->local_next_by_ip_protocol[ip1->protocol];
1437 error0 != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next0;
1439 error1 != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next1;
1441 p0->error = error_node->errors[error0];
1442 p1->error = error_node->errors[error1];
1444 if (head_of_feature_arc)
1446 if (PREDICT_TRUE (error0 == (u8) IP6_ERROR_UNKNOWN_PROTOCOL))
1447 vnet_feature_arc_start (arc_index,
1448 vnet_buffer (p0)->sw_if_index
1449 [VLIB_RX], &next0, p0);
1450 if (PREDICT_TRUE (error1 == (u8) IP6_ERROR_UNKNOWN_PROTOCOL))
1451 vnet_feature_arc_start (arc_index,
1452 vnet_buffer (p1)->sw_if_index
1453 [VLIB_RX], &next1, p1);
1456 vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
1457 to_next, n_left_to_next,
1458 pi0, pi1, next0, next1);
1461 while (n_left_from > 0 && n_left_to_next > 0)
1466 u32 pi0, ip_len0, udp_len0, flags0, next0;
1468 u8 error0, type0, good_l4_csum0;
1472 pi0 = to_next[0] = from[0];
1476 n_left_to_next -= 1;
1478 error0 = IP6_ERROR_UNKNOWN_PROTOCOL;
1480 p0 = vlib_get_buffer (vm, pi0);
1481 ip0 = vlib_buffer_get_current (p0);
1483 if (head_of_feature_arc == 0)
1486 vnet_buffer (p0)->l3_hdr_offset = p0->current_data;
1488 type0 = lm->builtin_protocol_by_ip_protocol[ip0->protocol];
1490 is_tcp_udp0 = ip6_next_proto_is_tcp_udp (p0, ip0, &udp_offset0);
1491 good_l4_csum0 = (flags0 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0;
1494 if (PREDICT_TRUE (is_tcp_udp0))
1496 udp0 = (udp_header_t *) ((u8 *) ip0 + udp_offset0);
1497 /* Don't verify UDP checksum for packets with explicit zero
1499 good_l4_csum0 |= type0 == IP_BUILTIN_PROTOCOL_UDP
1500 && udp0->checksum == 0;
1501 /* Verify UDP length. */
1502 if (is_tcp_udp0 == IP_PROTOCOL_UDP)
1504 ip_len0 = clib_net_to_host_u16 (ip0->payload_length);
1505 udp_len0 = clib_net_to_host_u16 (udp0->length);
1506 len_diff0 = ip_len0 - udp_len0;
1510 good_l4_csum0 |= type0 == IP_BUILTIN_PROTOCOL_UNKNOWN;
1511 len_diff0 = type0 == IP_BUILTIN_PROTOCOL_UDP ? len_diff0 : 0;
1513 if (PREDICT_FALSE (type0 != IP_BUILTIN_PROTOCOL_UNKNOWN
1516 VNET_BUFFER_F_L4_CHECKSUM_COMPUTED)))
1518 flags0 = ip6_tcp_udp_icmp_validate_checksum (vm, p0);
1520 (flags0 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0;
1523 error0 = IP6_ERROR_UNKNOWN_PROTOCOL;
1524 error0 = len_diff0 < 0 ? IP6_ERROR_UDP_LENGTH : error0;
1526 ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_UDP ==
1527 IP6_ERROR_UDP_CHECKSUM);
1528 ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_ICMP ==
1529 IP6_ERROR_ICMP_CHECKSUM);
1530 error0 = (!good_l4_csum0 ? IP6_ERROR_UDP_CHECKSUM + type0 : error0);
1532 /* If this is a neighbor solicitation (ICMP), skip src RPF check */
1533 if (error0 == IP6_ERROR_UNKNOWN_PROTOCOL &&
1534 type0 != IP_BUILTIN_PROTOCOL_ICMP &&
1535 !ip6_address_is_link_local_unicast (&ip0->src_address))
1537 error0 = (!ip6_urpf_loose_check (im, p0, ip0)
1538 ? IP6_ERROR_SRC_LOOKUP_MISS : error0);
1543 next0 = lm->local_next_by_ip_protocol[ip0->protocol];
1545 error0 != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next0;
1546 p0->error = error_node->errors[error0];
1548 if (head_of_feature_arc)
1550 if (PREDICT_TRUE (error0 == (u8) IP6_ERROR_UNKNOWN_PROTOCOL))
1551 vnet_feature_arc_start (arc_index,
1552 vnet_buffer (p0)->sw_if_index
1553 [VLIB_RX], &next0, p0);
1556 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1557 to_next, n_left_to_next,
1561 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1564 return frame->n_vectors;
1568 ip6_local (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
1570 return ip6_local_inline (vm, node, frame, 1 /* head of feature arc */ );
1574 VLIB_REGISTER_NODE (ip6_local_node, static) =
1576 .function = ip6_local,
1577 .name = "ip6-local",
1578 .vector_size = sizeof (u32),
1579 .format_trace = format_ip6_forward_next_trace,
1580 .n_next_nodes = IP_LOCAL_N_NEXT,
1583 [IP_LOCAL_NEXT_DROP] = "ip6-drop",
1584 [IP_LOCAL_NEXT_PUNT] = "ip6-punt",
1585 [IP_LOCAL_NEXT_UDP_LOOKUP] = "ip6-udp-lookup",
1586 [IP_LOCAL_NEXT_ICMP] = "ip6-icmp-input",
1591 VLIB_NODE_FUNCTION_MULTIARCH (ip6_local_node, ip6_local);
1595 ip6_local_end_of_arc (vlib_main_t * vm,
1596 vlib_node_runtime_t * node, vlib_frame_t * frame)
1598 return ip6_local_inline (vm, node, frame, 0 /* head of feature arc */ );
1602 VLIB_REGISTER_NODE (ip6_local_end_of_arc_node,static) = {
1603 .function = ip6_local_end_of_arc,
1604 .name = "ip6-local-end-of-arc",
1605 .vector_size = sizeof (u32),
1607 .format_trace = format_ip6_forward_next_trace,
1608 .sibling_of = "ip6-local",
1611 VLIB_NODE_FUNCTION_MULTIARCH (ip6_local_end_of_arc_node, ip6_local_end_of_arc)
1613 VNET_FEATURE_INIT (ip6_local_end_of_arc, static) = {
1614 .arc_name = "ip6-local",
1615 .node_name = "ip6-local-end-of-arc",
1616 .runs_before = 0, /* not before any other features */
1621 ip6_register_protocol (u32 protocol, u32 node_index)
1623 vlib_main_t *vm = vlib_get_main ();
1624 ip6_main_t *im = &ip6_main;
1625 ip_lookup_main_t *lm = &im->lookup_main;
1627 ASSERT (protocol < ARRAY_LEN (lm->local_next_by_ip_protocol));
1628 lm->local_next_by_ip_protocol[protocol] =
1629 vlib_node_add_next (vm, ip6_local_node.index, node_index);
1634 IP6_DISCOVER_NEIGHBOR_NEXT_DROP,
1635 IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX,
1636 IP6_DISCOVER_NEIGHBOR_N_NEXT,
1637 } ip6_discover_neighbor_next_t;
1641 IP6_DISCOVER_NEIGHBOR_ERROR_DROP,
1642 IP6_DISCOVER_NEIGHBOR_ERROR_REQUEST_SENT,
1643 IP6_DISCOVER_NEIGHBOR_ERROR_NO_SOURCE_ADDRESS,
1644 } ip6_discover_neighbor_error_t;
1647 ip6_discover_neighbor_inline (vlib_main_t * vm,
1648 vlib_node_runtime_t * node,
1649 vlib_frame_t * frame, int is_glean)
1651 vnet_main_t *vnm = vnet_get_main ();
1652 ip6_main_t *im = &ip6_main;
1653 ip_lookup_main_t *lm = &im->lookup_main;
1654 u32 *from, *to_next_drop;
1655 uword n_left_from, n_left_to_next_drop;
1656 static f64 time_last_seed_change = -1e100;
1657 static u32 hash_seeds[3];
1658 static uword hash_bitmap[256 / BITS (uword)];
1662 if (node->flags & VLIB_NODE_FLAG_TRACE)
1663 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
1665 time_now = vlib_time_now (vm);
1666 if (time_now - time_last_seed_change > 1e-3)
1669 u32 *r = clib_random_buffer_get_data (&vm->random_buffer,
1670 sizeof (hash_seeds));
1671 for (i = 0; i < ARRAY_LEN (hash_seeds); i++)
1672 hash_seeds[i] = r[i];
1674 /* Mark all hash keys as been not-seen before. */
1675 for (i = 0; i < ARRAY_LEN (hash_bitmap); i++)
1678 time_last_seed_change = time_now;
1681 from = vlib_frame_vector_args (frame);
1682 n_left_from = frame->n_vectors;
1684 while (n_left_from > 0)
1686 vlib_get_next_frame (vm, node, IP6_DISCOVER_NEIGHBOR_NEXT_DROP,
1687 to_next_drop, n_left_to_next_drop);
1689 while (n_left_from > 0 && n_left_to_next_drop > 0)
1693 u32 pi0, adj_index0, a0, b0, c0, m0, sw_if_index0, drop0;
1695 ip_adjacency_t *adj0;
1696 vnet_hw_interface_t *hw_if0;
1701 p0 = vlib_get_buffer (vm, pi0);
1703 adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
1705 ip0 = vlib_buffer_get_current (p0);
1707 adj0 = adj_get (adj_index0);
1711 ip0->dst_address.as_u64[0] =
1712 adj0->sub_type.nbr.next_hop.ip6.as_u64[0];
1713 ip0->dst_address.as_u64[1] =
1714 adj0->sub_type.nbr.next_hop.ip6.as_u64[1];
1721 sw_if_index0 = adj0->rewrite_header.sw_if_index;
1722 vnet_buffer (p0)->sw_if_index[VLIB_TX] = sw_if_index0;
1725 b0 ^= ip0->dst_address.as_u32[0];
1726 c0 ^= ip0->dst_address.as_u32[1];
1728 hash_v3_mix32 (a0, b0, c0);
1730 b0 ^= ip0->dst_address.as_u32[2];
1731 c0 ^= ip0->dst_address.as_u32[3];
1733 hash_v3_finalize32 (a0, b0, c0);
1735 c0 &= BITS (hash_bitmap) - 1;
1736 c0 = c0 / BITS (uword);
1737 m0 = (uword) 1 << (c0 % BITS (uword));
1739 bm0 = hash_bitmap[c0];
1740 drop0 = (bm0 & m0) != 0;
1742 /* Mark it as seen. */
1743 hash_bitmap[c0] = bm0 | m0;
1747 to_next_drop[0] = pi0;
1749 n_left_to_next_drop -= 1;
1751 hw_if0 = vnet_get_sup_hw_interface (vnm, sw_if_index0);
1753 /* If the interface is link-down, drop the pkt */
1754 if (!(hw_if0->flags & VNET_HW_INTERFACE_FLAG_LINK_UP))
1758 node->errors[drop0 ? IP6_DISCOVER_NEIGHBOR_ERROR_DROP
1759 : IP6_DISCOVER_NEIGHBOR_ERROR_REQUEST_SENT];
1764 * the adj has been updated to a rewrite but the node the DPO that got
1765 * us here hasn't - yet. no big deal. we'll drop while we wait.
1767 if (IP_LOOKUP_NEXT_REWRITE == adj0->lookup_next_index)
1772 icmp6_neighbor_solicitation_header_t *h0;
1775 h0 = vlib_packet_template_get_packet
1776 (vm, &im->discover_neighbor_packet_template, &bi0);
1779 * Build ethernet header.
1780 * Choose source address based on destination lookup
1783 if (ip6_src_address_for_packet (lm,
1785 &h0->ip.src_address))
1787 /* There is no address on the interface */
1789 node->errors[IP6_DISCOVER_NEIGHBOR_ERROR_NO_SOURCE_ADDRESS];
1790 vlib_buffer_free (vm, &bi0, 1);
1795 * Destination address is a solicited node multicast address.
1796 * We need to fill in
1797 * the low 24 bits with low 24 bits of target's address.
1799 h0->ip.dst_address.as_u8[13] = ip0->dst_address.as_u8[13];
1800 h0->ip.dst_address.as_u8[14] = ip0->dst_address.as_u8[14];
1801 h0->ip.dst_address.as_u8[15] = ip0->dst_address.as_u8[15];
1803 h0->neighbor.target_address = ip0->dst_address;
1805 clib_memcpy (h0->link_layer_option.ethernet_address,
1806 hw_if0->hw_address, vec_len (hw_if0->hw_address));
1808 /* $$$$ appears we need this; why is the checksum non-zero? */
1809 h0->neighbor.icmp.checksum = 0;
1810 h0->neighbor.icmp.checksum =
1811 ip6_tcp_udp_icmp_compute_checksum (vm, 0, &h0->ip,
1814 ASSERT (bogus_length == 0);
1816 vlib_buffer_copy_trace_flag (vm, p0, bi0);
1817 b0 = vlib_get_buffer (vm, bi0);
1818 vnet_buffer (b0)->sw_if_index[VLIB_TX]
1819 = vnet_buffer (p0)->sw_if_index[VLIB_TX];
1821 /* Add rewrite/encap string. */
1822 vnet_rewrite_one_header (adj0[0], h0, sizeof (ethernet_header_t));
1823 vlib_buffer_advance (b0, -adj0->rewrite_header.data_bytes);
1825 next0 = IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX;
1827 vlib_set_next_frame_buffer (vm, node, next0, bi0);
1831 vlib_put_next_frame (vm, node, IP6_DISCOVER_NEIGHBOR_NEXT_DROP,
1832 n_left_to_next_drop);
1835 return frame->n_vectors;
1839 ip6_discover_neighbor (vlib_main_t * vm,
1840 vlib_node_runtime_t * node, vlib_frame_t * frame)
1842 return (ip6_discover_neighbor_inline (vm, node, frame, 0));
1846 ip6_glean (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
1848 return (ip6_discover_neighbor_inline (vm, node, frame, 1));
1851 static char *ip6_discover_neighbor_error_strings[] = {
1852 [IP6_DISCOVER_NEIGHBOR_ERROR_DROP] = "address overflow drops",
1853 [IP6_DISCOVER_NEIGHBOR_ERROR_REQUEST_SENT] = "neighbor solicitations sent",
1854 [IP6_DISCOVER_NEIGHBOR_ERROR_NO_SOURCE_ADDRESS]
1855 = "no source address for ND solicitation",
1859 VLIB_REGISTER_NODE (ip6_discover_neighbor_node) =
1861 .function = ip6_discover_neighbor,
1862 .name = "ip6-discover-neighbor",
1863 .vector_size = sizeof (u32),
1864 .format_trace = format_ip6_forward_next_trace,
1865 .n_errors = ARRAY_LEN (ip6_discover_neighbor_error_strings),
1866 .error_strings = ip6_discover_neighbor_error_strings,
1867 .n_next_nodes = IP6_DISCOVER_NEIGHBOR_N_NEXT,
1870 [IP6_DISCOVER_NEIGHBOR_NEXT_DROP] = "error-drop",
1871 [IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX] = "interface-output",
1877 VLIB_REGISTER_NODE (ip6_glean_node) =
1879 .function = ip6_glean,
1880 .name = "ip6-glean",
1881 .vector_size = sizeof (u32),
1882 .format_trace = format_ip6_forward_next_trace,
1883 .n_errors = ARRAY_LEN (ip6_discover_neighbor_error_strings),
1884 .error_strings = ip6_discover_neighbor_error_strings,
1885 .n_next_nodes = IP6_DISCOVER_NEIGHBOR_N_NEXT,
1888 [IP6_DISCOVER_NEIGHBOR_NEXT_DROP] = "error-drop",
1889 [IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX] = "interface-output",
1895 ip6_probe_neighbor (vlib_main_t * vm, ip6_address_t * dst, u32 sw_if_index)
1897 vnet_main_t *vnm = vnet_get_main ();
1898 ip6_main_t *im = &ip6_main;
1899 icmp6_neighbor_solicitation_header_t *h;
1901 ip_interface_address_t *ia;
1902 ip_adjacency_t *adj;
1903 vnet_hw_interface_t *hi;
1904 vnet_sw_interface_t *si;
1910 si = vnet_get_sw_interface (vnm, sw_if_index);
1912 if (!(si->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP))
1914 return clib_error_return (0, "%U: interface %U down",
1915 format_ip6_address, dst,
1916 format_vnet_sw_if_index_name, vnm,
1921 ip6_interface_address_matching_destination (im, dst, sw_if_index, &ia);
1924 vnm->api_errno = VNET_API_ERROR_NO_MATCHING_INTERFACE;
1925 return clib_error_return
1926 (0, "no matching interface address for destination %U (interface %U)",
1927 format_ip6_address, dst,
1928 format_vnet_sw_if_index_name, vnm, sw_if_index);
1932 vlib_packet_template_get_packet (vm,
1933 &im->discover_neighbor_packet_template,
1936 hi = vnet_get_sup_hw_interface (vnm, sw_if_index);
1938 /* Destination address is a solicited node multicast address. We need to fill in
1939 the low 24 bits with low 24 bits of target's address. */
1940 h->ip.dst_address.as_u8[13] = dst->as_u8[13];
1941 h->ip.dst_address.as_u8[14] = dst->as_u8[14];
1942 h->ip.dst_address.as_u8[15] = dst->as_u8[15];
1944 h->ip.src_address = src[0];
1945 h->neighbor.target_address = dst[0];
1947 if (PREDICT_FALSE (!hi->hw_address))
1949 return clib_error_return (0, "%U: interface %U do not support ip probe",
1950 format_ip6_address, dst,
1951 format_vnet_sw_if_index_name, vnm,
1955 clib_memcpy (h->link_layer_option.ethernet_address, hi->hw_address,
1956 vec_len (hi->hw_address));
1958 h->neighbor.icmp.checksum =
1959 ip6_tcp_udp_icmp_compute_checksum (vm, 0, &h->ip, &bogus_length);
1960 ASSERT (bogus_length == 0);
1962 b = vlib_get_buffer (vm, bi);
1963 vnet_buffer (b)->sw_if_index[VLIB_RX] =
1964 vnet_buffer (b)->sw_if_index[VLIB_TX] = sw_if_index;
1966 /* Add encapsulation string for software interface (e.g. ethernet header). */
1967 ip46_address_t nh = {
1971 ai = adj_nbr_add_or_lock (FIB_PROTOCOL_IP6,
1972 VNET_LINK_IP6, &nh, sw_if_index);
1975 /* Peer has been previously resolved, retrieve glean adj instead */
1976 if (adj->lookup_next_index == IP_LOOKUP_NEXT_REWRITE)
1979 ai = adj_glean_add_or_lock (FIB_PROTOCOL_IP6, sw_if_index, &nh);
1983 vnet_rewrite_one_header (adj[0], h, sizeof (ethernet_header_t));
1984 vlib_buffer_advance (b, -adj->rewrite_header.data_bytes);
1987 vlib_frame_t *f = vlib_get_frame_to_node (vm, hi->output_node_index);
1988 u32 *to_next = vlib_frame_vector_args (f);
1991 vlib_put_frame_to_node (vm, hi->output_node_index, f);
1995 return /* no error */ 0;
2000 IP6_REWRITE_NEXT_DROP,
2001 IP6_REWRITE_NEXT_ICMP_ERROR,
2002 } ip6_rewrite_next_t;
2005 ip6_rewrite_inline (vlib_main_t * vm,
2006 vlib_node_runtime_t * node,
2007 vlib_frame_t * frame,
2008 int do_counters, int is_midchain, int is_mcast)
2010 ip_lookup_main_t *lm = &ip6_main.lookup_main;
2011 u32 *from = vlib_frame_vector_args (frame);
2012 u32 n_left_from, n_left_to_next, *to_next, next_index;
2013 vlib_node_runtime_t *error_node =
2014 vlib_node_get_runtime (vm, ip6_input_node.index);
2016 n_left_from = frame->n_vectors;
2017 next_index = node->cached_next_index;
2018 u32 thread_index = vlib_get_thread_index ();
2020 while (n_left_from > 0)
2022 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
2024 while (n_left_from >= 4 && n_left_to_next >= 2)
2026 ip_adjacency_t *adj0, *adj1;
2027 vlib_buffer_t *p0, *p1;
2028 ip6_header_t *ip0, *ip1;
2029 u32 pi0, rw_len0, next0, error0, adj_index0;
2030 u32 pi1, rw_len1, next1, error1, adj_index1;
2031 u32 tx_sw_if_index0, tx_sw_if_index1;
2033 /* Prefetch next iteration. */
2035 vlib_buffer_t *p2, *p3;
2037 p2 = vlib_get_buffer (vm, from[2]);
2038 p3 = vlib_get_buffer (vm, from[3]);
2040 vlib_prefetch_buffer_header (p2, LOAD);
2041 vlib_prefetch_buffer_header (p3, LOAD);
2043 CLIB_PREFETCH (p2->pre_data, 32, STORE);
2044 CLIB_PREFETCH (p3->pre_data, 32, STORE);
2046 CLIB_PREFETCH (p2->data, sizeof (ip0[0]), STORE);
2047 CLIB_PREFETCH (p3->data, sizeof (ip0[0]), STORE);
2050 pi0 = to_next[0] = from[0];
2051 pi1 = to_next[1] = from[1];
2056 n_left_to_next -= 2;
2058 p0 = vlib_get_buffer (vm, pi0);
2059 p1 = vlib_get_buffer (vm, pi1);
2061 adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
2062 adj_index1 = vnet_buffer (p1)->ip.adj_index[VLIB_TX];
2064 ip0 = vlib_buffer_get_current (p0);
2065 ip1 = vlib_buffer_get_current (p1);
2067 error0 = error1 = IP6_ERROR_NONE;
2068 next0 = next1 = IP6_REWRITE_NEXT_DROP;
2070 if (PREDICT_TRUE (!(p0->flags & VNET_BUFFER_F_LOCALLY_ORIGINATED)))
2072 i32 hop_limit0 = ip0->hop_limit;
2074 /* Input node should have reject packets with hop limit 0. */
2075 ASSERT (ip0->hop_limit > 0);
2079 ip0->hop_limit = hop_limit0;
2082 * If the hop count drops below 1 when forwarding, generate
2085 if (PREDICT_FALSE (hop_limit0 <= 0))
2087 error0 = IP6_ERROR_TIME_EXPIRED;
2088 next0 = IP6_REWRITE_NEXT_ICMP_ERROR;
2089 vnet_buffer (p0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
2090 icmp6_error_set_vnet_buffer (p0, ICMP6_time_exceeded,
2091 ICMP6_time_exceeded_ttl_exceeded_in_transit,
2097 p0->flags &= ~VNET_BUFFER_F_LOCALLY_ORIGINATED;
2099 if (PREDICT_TRUE (!(p1->flags & VNET_BUFFER_F_LOCALLY_ORIGINATED)))
2101 i32 hop_limit1 = ip1->hop_limit;
2103 /* Input node should have reject packets with hop limit 0. */
2104 ASSERT (ip1->hop_limit > 0);
2108 ip1->hop_limit = hop_limit1;
2111 * If the hop count drops below 1 when forwarding, generate
2114 if (PREDICT_FALSE (hop_limit1 <= 0))
2116 error1 = IP6_ERROR_TIME_EXPIRED;
2117 next1 = IP6_REWRITE_NEXT_ICMP_ERROR;
2118 vnet_buffer (p1)->sw_if_index[VLIB_TX] = (u32) ~ 0;
2119 icmp6_error_set_vnet_buffer (p1, ICMP6_time_exceeded,
2120 ICMP6_time_exceeded_ttl_exceeded_in_transit,
2126 p1->flags &= ~VNET_BUFFER_F_LOCALLY_ORIGINATED;
2128 adj0 = adj_get (adj_index0);
2129 adj1 = adj_get (adj_index1);
2131 rw_len0 = adj0[0].rewrite_header.data_bytes;
2132 rw_len1 = adj1[0].rewrite_header.data_bytes;
2133 vnet_buffer (p0)->ip.save_rewrite_length = rw_len0;
2134 vnet_buffer (p1)->ip.save_rewrite_length = rw_len1;
2138 vlib_increment_combined_counter
2139 (&adjacency_counters,
2140 thread_index, adj_index0, 1,
2141 vlib_buffer_length_in_chain (vm, p0) + rw_len0);
2142 vlib_increment_combined_counter
2143 (&adjacency_counters,
2144 thread_index, adj_index1, 1,
2145 vlib_buffer_length_in_chain (vm, p1) + rw_len1);
2148 /* Check MTU of outgoing interface. */
2150 (vlib_buffer_length_in_chain (vm, p0) >
2152 rewrite_header.max_l3_packet_bytes ? IP6_ERROR_MTU_EXCEEDED :
2155 (vlib_buffer_length_in_chain (vm, p1) >
2157 rewrite_header.max_l3_packet_bytes ? IP6_ERROR_MTU_EXCEEDED :
2160 /* Don't adjust the buffer for hop count issue; icmp-error node
2161 * wants to see the IP headerr */
2162 if (PREDICT_TRUE (error0 == IP6_ERROR_NONE))
2164 p0->current_data -= rw_len0;
2165 p0->current_length += rw_len0;
2167 tx_sw_if_index0 = adj0[0].rewrite_header.sw_if_index;
2168 vnet_buffer (p0)->sw_if_index[VLIB_TX] = tx_sw_if_index0;
2169 next0 = adj0[0].rewrite_header.next_index;
2172 (adj0[0].rewrite_header.flags & VNET_REWRITE_HAS_FEATURES))
2173 vnet_feature_arc_start (lm->output_feature_arc_index,
2174 tx_sw_if_index0, &next0, p0);
2176 if (PREDICT_TRUE (error1 == IP6_ERROR_NONE))
2178 p1->current_data -= rw_len1;
2179 p1->current_length += rw_len1;
2181 tx_sw_if_index1 = adj1[0].rewrite_header.sw_if_index;
2182 vnet_buffer (p1)->sw_if_index[VLIB_TX] = tx_sw_if_index1;
2183 next1 = adj1[0].rewrite_header.next_index;
2186 (adj1[0].rewrite_header.flags & VNET_REWRITE_HAS_FEATURES))
2187 vnet_feature_arc_start (lm->output_feature_arc_index,
2188 tx_sw_if_index1, &next1, p1);
2191 /* Guess we are only writing on simple Ethernet header. */
2192 vnet_rewrite_two_headers (adj0[0], adj1[0],
2193 ip0, ip1, sizeof (ethernet_header_t));
2197 adj0->sub_type.midchain.fixup_func (vm, adj0, p0);
2198 adj1->sub_type.midchain.fixup_func (vm, adj1, p1);
2203 * copy bytes from the IP address into the MAC rewrite
2205 vnet_fixup_one_header (adj0[0], &ip0->dst_address, ip0);
2206 vnet_fixup_one_header (adj1[0], &ip1->dst_address, ip1);
2209 vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
2210 to_next, n_left_to_next,
2211 pi0, pi1, next0, next1);
2214 while (n_left_from > 0 && n_left_to_next > 0)
2216 ip_adjacency_t *adj0;
2220 u32 adj_index0, next0, error0;
2221 u32 tx_sw_if_index0;
2223 pi0 = to_next[0] = from[0];
2225 p0 = vlib_get_buffer (vm, pi0);
2227 adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
2229 adj0 = adj_get (adj_index0);
2231 ip0 = vlib_buffer_get_current (p0);
2233 error0 = IP6_ERROR_NONE;
2234 next0 = IP6_REWRITE_NEXT_DROP;
2236 /* Check hop limit */
2237 if (PREDICT_TRUE (!(p0->flags & VNET_BUFFER_F_LOCALLY_ORIGINATED)))
2239 i32 hop_limit0 = ip0->hop_limit;
2241 ASSERT (ip0->hop_limit > 0);
2245 ip0->hop_limit = hop_limit0;
2247 if (PREDICT_FALSE (hop_limit0 <= 0))
2250 * If the hop count drops below 1 when forwarding, generate
2253 error0 = IP6_ERROR_TIME_EXPIRED;
2254 next0 = IP6_REWRITE_NEXT_ICMP_ERROR;
2255 vnet_buffer (p0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
2256 icmp6_error_set_vnet_buffer (p0, ICMP6_time_exceeded,
2257 ICMP6_time_exceeded_ttl_exceeded_in_transit,
2263 p0->flags &= ~VNET_BUFFER_F_LOCALLY_ORIGINATED;
2266 /* Guess we are only writing on simple Ethernet header. */
2267 vnet_rewrite_one_header (adj0[0], ip0, sizeof (ethernet_header_t));
2269 /* Update packet buffer attributes/set output interface. */
2270 rw_len0 = adj0[0].rewrite_header.data_bytes;
2271 vnet_buffer (p0)->ip.save_rewrite_length = rw_len0;
2275 vlib_increment_combined_counter
2276 (&adjacency_counters,
2277 thread_index, adj_index0, 1,
2278 vlib_buffer_length_in_chain (vm, p0) + rw_len0);
2281 /* Check MTU of outgoing interface. */
2283 (vlib_buffer_length_in_chain (vm, p0) >
2285 rewrite_header.max_l3_packet_bytes ? IP6_ERROR_MTU_EXCEEDED :
2288 /* Don't adjust the buffer for hop count issue; icmp-error node
2289 * wants to see the IP headerr */
2290 if (PREDICT_TRUE (error0 == IP6_ERROR_NONE))
2292 p0->current_data -= rw_len0;
2293 p0->current_length += rw_len0;
2295 tx_sw_if_index0 = adj0[0].rewrite_header.sw_if_index;
2297 vnet_buffer (p0)->sw_if_index[VLIB_TX] = tx_sw_if_index0;
2298 next0 = adj0[0].rewrite_header.next_index;
2301 (adj0[0].rewrite_header.flags & VNET_REWRITE_HAS_FEATURES))
2302 vnet_feature_arc_start (lm->output_feature_arc_index,
2303 tx_sw_if_index0, &next0, p0);
2308 adj0->sub_type.midchain.fixup_func (vm, adj0, p0);
2312 vnet_fixup_one_header (adj0[0], &ip0->dst_address, ip0);
2315 p0->error = error_node->errors[error0];
2320 n_left_to_next -= 1;
2322 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
2323 to_next, n_left_to_next,
2327 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2330 /* Need to do trace after rewrites to pick up new packet data. */
2331 if (node->flags & VLIB_NODE_FLAG_TRACE)
2332 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
2334 return frame->n_vectors;
2338 ip6_rewrite (vlib_main_t * vm,
2339 vlib_node_runtime_t * node, vlib_frame_t * frame)
2341 if (adj_are_counters_enabled ())
2342 return ip6_rewrite_inline (vm, node, frame, 1, 0, 0);
2344 return ip6_rewrite_inline (vm, node, frame, 0, 0, 0);
2348 ip6_rewrite_mcast (vlib_main_t * vm,
2349 vlib_node_runtime_t * node, vlib_frame_t * frame)
2351 if (adj_are_counters_enabled ())
2352 return ip6_rewrite_inline (vm, node, frame, 1, 0, 1);
2354 return ip6_rewrite_inline (vm, node, frame, 0, 0, 1);
2358 ip6_midchain (vlib_main_t * vm,
2359 vlib_node_runtime_t * node, vlib_frame_t * frame)
2361 if (adj_are_counters_enabled ())
2362 return ip6_rewrite_inline (vm, node, frame, 1, 1, 0);
2364 return ip6_rewrite_inline (vm, node, frame, 0, 1, 0);
2368 ip6_mcast_midchain (vlib_main_t * vm,
2369 vlib_node_runtime_t * node, vlib_frame_t * frame)
2371 if (adj_are_counters_enabled ())
2372 return ip6_rewrite_inline (vm, node, frame, 1, 1, 1);
2374 return ip6_rewrite_inline (vm, node, frame, 0, 1, 1);
2378 VLIB_REGISTER_NODE (ip6_midchain_node) =
2380 .function = ip6_midchain,
2381 .name = "ip6-midchain",
2382 .vector_size = sizeof (u32),
2383 .format_trace = format_ip6_forward_next_trace,
2384 .sibling_of = "ip6-rewrite",
2388 VLIB_NODE_FUNCTION_MULTIARCH (ip6_midchain_node, ip6_midchain);
2391 VLIB_REGISTER_NODE (ip6_rewrite_node) =
2393 .function = ip6_rewrite,
2394 .name = "ip6-rewrite",
2395 .vector_size = sizeof (u32),
2396 .format_trace = format_ip6_rewrite_trace,
2400 [IP6_REWRITE_NEXT_DROP] = "error-drop",
2401 [IP6_REWRITE_NEXT_ICMP_ERROR] = "ip6-icmp-error",
2406 VLIB_NODE_FUNCTION_MULTIARCH (ip6_rewrite_node, ip6_rewrite);
2409 VLIB_REGISTER_NODE (ip6_rewrite_mcast_node) =
2411 .function = ip6_rewrite_mcast,
2412 .name = "ip6-rewrite-mcast",
2413 .vector_size = sizeof (u32),
2414 .format_trace = format_ip6_rewrite_trace,
2415 .sibling_of = "ip6-rewrite",
2419 VLIB_NODE_FUNCTION_MULTIARCH (ip6_rewrite_mcast_node, ip6_rewrite_mcast);
2422 VLIB_REGISTER_NODE (ip6_mcast_midchain_node, static) =
2424 .function = ip6_mcast_midchain,
2425 .name = "ip6-mcast-midchain",
2426 .vector_size = sizeof (u32),
2427 .format_trace = format_ip6_rewrite_trace,
2428 .sibling_of = "ip6-rewrite",
2432 VLIB_NODE_FUNCTION_MULTIARCH (ip6_mcast_midchain_node, ip6_mcast_midchain);
2435 * Hop-by-Hop handling
2437 ip6_hop_by_hop_main_t ip6_hop_by_hop_main;
2439 #define foreach_ip6_hop_by_hop_error \
2440 _(PROCESSED, "pkts with ip6 hop-by-hop options") \
2441 _(FORMAT, "incorrectly formatted hop-by-hop options") \
2442 _(UNKNOWN_OPTION, "unknown ip6 hop-by-hop options")
2447 #define _(sym,str) IP6_HOP_BY_HOP_ERROR_##sym,
2448 foreach_ip6_hop_by_hop_error
2450 IP6_HOP_BY_HOP_N_ERROR,
2451 } ip6_hop_by_hop_error_t;
2455 * Primary h-b-h handler trace support
2456 * We work pretty hard on the problem for obvious reasons
2462 u8 option_data[256];
2463 } ip6_hop_by_hop_trace_t;
2465 vlib_node_registration_t ip6_hop_by_hop_node;
2467 static char *ip6_hop_by_hop_error_strings[] = {
2468 #define _(sym,string) string,
2469 foreach_ip6_hop_by_hop_error
2474 format_ip6_hop_by_hop_ext_hdr (u8 * s, va_list * args)
2476 ip6_hop_by_hop_header_t *hbh0 = va_arg (*args, ip6_hop_by_hop_header_t *);
2477 int total_len = va_arg (*args, int);
2478 ip6_hop_by_hop_option_t *opt0, *limit0;
2479 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2482 s = format (s, "IP6_HOP_BY_HOP: next protocol %d len %d total %d",
2483 hbh0->protocol, (hbh0->length + 1) << 3, total_len);
2485 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2486 limit0 = (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 + total_len);
2488 while (opt0 < limit0)
2493 case 0: /* Pad, just stop */
2494 opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0 + 1);
2498 if (hm->trace[type0])
2500 s = (*hm->trace[type0]) (s, opt0);
2505 format (s, "\n unrecognized option %d length %d", type0,
2509 (ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length +
2510 sizeof (ip6_hop_by_hop_option_t));
2518 format_ip6_hop_by_hop_trace (u8 * s, va_list * args)
2520 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
2521 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
2522 ip6_hop_by_hop_trace_t *t = va_arg (*args, ip6_hop_by_hop_trace_t *);
2523 ip6_hop_by_hop_header_t *hbh0;
2524 ip6_hop_by_hop_option_t *opt0, *limit0;
2525 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2529 hbh0 = (ip6_hop_by_hop_header_t *) t->option_data;
2531 s = format (s, "IP6_HOP_BY_HOP: next index %d len %d traced %d",
2532 t->next_index, (hbh0->length + 1) << 3, t->trace_len);
2534 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2535 limit0 = (ip6_hop_by_hop_option_t *) ((u8 *) hbh0) + t->trace_len;
2537 while (opt0 < limit0)
2542 case 0: /* Pad, just stop */
2543 opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0) + 1;
2547 if (hm->trace[type0])
2549 s = (*hm->trace[type0]) (s, opt0);
2554 format (s, "\n unrecognized option %d length %d", type0,
2558 (ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length +
2559 sizeof (ip6_hop_by_hop_option_t));
2567 ip6_scan_hbh_options (vlib_buffer_t * b0,
2569 ip6_hop_by_hop_header_t * hbh0,
2570 ip6_hop_by_hop_option_t * opt0,
2571 ip6_hop_by_hop_option_t * limit0, u32 * next0)
2573 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2577 while (opt0 < limit0)
2583 opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0) + 1;
2588 if (hm->options[type0])
2590 if ((*hm->options[type0]) (b0, ip0, opt0) < 0)
2592 error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2598 /* Unrecognized mandatory option, check the two high order bits */
2599 switch (opt0->type & HBH_OPTION_TYPE_HIGH_ORDER_BITS)
2601 case HBH_OPTION_TYPE_SKIP_UNKNOWN:
2603 case HBH_OPTION_TYPE_DISCARD_UNKNOWN:
2604 error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2605 *next0 = IP_LOOKUP_NEXT_DROP;
2607 case HBH_OPTION_TYPE_DISCARD_UNKNOWN_ICMP:
2608 error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2609 *next0 = IP_LOOKUP_NEXT_ICMP_ERROR;
2610 icmp6_error_set_vnet_buffer (b0, ICMP6_parameter_problem,
2611 ICMP6_parameter_problem_unrecognized_option,
2612 (u8 *) opt0 - (u8 *) ip0);
2614 case HBH_OPTION_TYPE_DISCARD_UNKNOWN_ICMP_NOT_MCAST:
2615 error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2616 if (!ip6_address_is_multicast (&ip0->dst_address))
2618 *next0 = IP_LOOKUP_NEXT_ICMP_ERROR;
2619 icmp6_error_set_vnet_buffer (b0,
2620 ICMP6_parameter_problem,
2621 ICMP6_parameter_problem_unrecognized_option,
2622 (u8 *) opt0 - (u8 *) ip0);
2626 *next0 = IP_LOOKUP_NEXT_DROP;
2634 (ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length +
2635 sizeof (ip6_hop_by_hop_option_t));
2641 * Process the Hop-by-Hop Options header
2644 ip6_hop_by_hop (vlib_main_t * vm,
2645 vlib_node_runtime_t * node, vlib_frame_t * frame)
2647 vlib_node_runtime_t *error_node =
2648 vlib_node_get_runtime (vm, ip6_hop_by_hop_node.index);
2649 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2650 u32 n_left_from, *from, *to_next;
2651 ip_lookup_next_t next_index;
2653 from = vlib_frame_vector_args (frame);
2654 n_left_from = frame->n_vectors;
2655 next_index = node->cached_next_index;
2657 while (n_left_from > 0)
2661 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
2663 while (n_left_from >= 4 && n_left_to_next >= 2)
2666 vlib_buffer_t *b0, *b1;
2668 ip6_header_t *ip0, *ip1;
2669 ip6_hop_by_hop_header_t *hbh0, *hbh1;
2670 ip6_hop_by_hop_option_t *opt0, *limit0, *opt1, *limit1;
2671 u8 error0 = 0, error1 = 0;
2673 /* Prefetch next iteration. */
2675 vlib_buffer_t *p2, *p3;
2677 p2 = vlib_get_buffer (vm, from[2]);
2678 p3 = vlib_get_buffer (vm, from[3]);
2680 vlib_prefetch_buffer_header (p2, LOAD);
2681 vlib_prefetch_buffer_header (p3, LOAD);
2683 CLIB_PREFETCH (p2->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
2684 CLIB_PREFETCH (p3->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
2687 /* Speculatively enqueue b0, b1 to the current next frame */
2688 to_next[0] = bi0 = from[0];
2689 to_next[1] = bi1 = from[1];
2693 n_left_to_next -= 2;
2695 b0 = vlib_get_buffer (vm, bi0);
2696 b1 = vlib_get_buffer (vm, bi1);
2698 /* Default use the next_index from the adjacency. A HBH option rarely redirects to a different node */
2699 u32 adj_index0 = vnet_buffer (b0)->ip.adj_index[VLIB_TX];
2700 ip_adjacency_t *adj0 = adj_get (adj_index0);
2701 u32 adj_index1 = vnet_buffer (b1)->ip.adj_index[VLIB_TX];
2702 ip_adjacency_t *adj1 = adj_get (adj_index1);
2704 /* Default use the next_index from the adjacency. A HBH option rarely redirects to a different node */
2705 next0 = adj0->lookup_next_index;
2706 next1 = adj1->lookup_next_index;
2708 ip0 = vlib_buffer_get_current (b0);
2709 ip1 = vlib_buffer_get_current (b1);
2710 hbh0 = (ip6_hop_by_hop_header_t *) (ip0 + 1);
2711 hbh1 = (ip6_hop_by_hop_header_t *) (ip1 + 1);
2712 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2713 opt1 = (ip6_hop_by_hop_option_t *) (hbh1 + 1);
2715 (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 +
2716 ((hbh0->length + 1) << 3));
2718 (ip6_hop_by_hop_option_t *) ((u8 *) hbh1 +
2719 ((hbh1->length + 1) << 3));
2722 * Basic validity checks
2724 if ((hbh0->length + 1) << 3 >
2725 clib_net_to_host_u16 (ip0->payload_length))
2727 error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2728 next0 = IP_LOOKUP_NEXT_DROP;
2731 /* Scan the set of h-b-h options, process ones that we understand */
2732 error0 = ip6_scan_hbh_options (b0, ip0, hbh0, opt0, limit0, &next0);
2734 if ((hbh1->length + 1) << 3 >
2735 clib_net_to_host_u16 (ip1->payload_length))
2737 error1 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2738 next1 = IP_LOOKUP_NEXT_DROP;
2741 /* Scan the set of h-b-h options, process ones that we understand */
2742 error1 = ip6_scan_hbh_options (b1, ip1, hbh1, opt1, limit1, &next1);
2745 /* Has the classifier flagged this buffer for special treatment? */
2748 && (vnet_buffer (b0)->l2_classify.opaque_index & OI_DECAP)))
2749 next0 = hm->next_override;
2751 /* Has the classifier flagged this buffer for special treatment? */
2754 && (vnet_buffer (b1)->l2_classify.opaque_index & OI_DECAP)))
2755 next1 = hm->next_override;
2757 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)))
2759 if (b0->flags & VLIB_BUFFER_IS_TRACED)
2761 ip6_hop_by_hop_trace_t *t =
2762 vlib_add_trace (vm, node, b0, sizeof (*t));
2763 u32 trace_len = (hbh0->length + 1) << 3;
2764 t->next_index = next0;
2765 /* Capture the h-b-h option verbatim */
2768 ARRAY_LEN (t->option_data) ? trace_len :
2769 ARRAY_LEN (t->option_data);
2770 t->trace_len = trace_len;
2771 clib_memcpy (t->option_data, hbh0, trace_len);
2773 if (b1->flags & VLIB_BUFFER_IS_TRACED)
2775 ip6_hop_by_hop_trace_t *t =
2776 vlib_add_trace (vm, node, b1, sizeof (*t));
2777 u32 trace_len = (hbh1->length + 1) << 3;
2778 t->next_index = next1;
2779 /* Capture the h-b-h option verbatim */
2782 ARRAY_LEN (t->option_data) ? trace_len :
2783 ARRAY_LEN (t->option_data);
2784 t->trace_len = trace_len;
2785 clib_memcpy (t->option_data, hbh1, trace_len);
2790 b0->error = error_node->errors[error0];
2791 b1->error = error_node->errors[error1];
2793 /* verify speculative enqueue, maybe switch current next frame */
2794 vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
2795 n_left_to_next, bi0, bi1, next0,
2799 while (n_left_from > 0 && n_left_to_next > 0)
2805 ip6_hop_by_hop_header_t *hbh0;
2806 ip6_hop_by_hop_option_t *opt0, *limit0;
2809 /* Speculatively enqueue b0 to the current next frame */
2815 n_left_to_next -= 1;
2817 b0 = vlib_get_buffer (vm, bi0);
2819 * Default use the next_index from the adjacency.
2820 * A HBH option rarely redirects to a different node
2822 u32 adj_index0 = vnet_buffer (b0)->ip.adj_index[VLIB_TX];
2823 ip_adjacency_t *adj0 = adj_get (adj_index0);
2824 next0 = adj0->lookup_next_index;
2826 ip0 = vlib_buffer_get_current (b0);
2827 hbh0 = (ip6_hop_by_hop_header_t *) (ip0 + 1);
2828 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2830 (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 +
2831 ((hbh0->length + 1) << 3));
2834 * Basic validity checks
2836 if ((hbh0->length + 1) << 3 >
2837 clib_net_to_host_u16 (ip0->payload_length))
2839 error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2840 next0 = IP_LOOKUP_NEXT_DROP;
2844 /* Scan the set of h-b-h options, process ones that we understand */
2845 error0 = ip6_scan_hbh_options (b0, ip0, hbh0, opt0, limit0, &next0);
2848 /* Has the classifier flagged this buffer for special treatment? */
2851 && (vnet_buffer (b0)->l2_classify.opaque_index & OI_DECAP)))
2852 next0 = hm->next_override;
2854 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
2856 ip6_hop_by_hop_trace_t *t =
2857 vlib_add_trace (vm, node, b0, sizeof (*t));
2858 u32 trace_len = (hbh0->length + 1) << 3;
2859 t->next_index = next0;
2860 /* Capture the h-b-h option verbatim */
2863 ARRAY_LEN (t->option_data) ? trace_len :
2864 ARRAY_LEN (t->option_data);
2865 t->trace_len = trace_len;
2866 clib_memcpy (t->option_data, hbh0, trace_len);
2869 b0->error = error_node->errors[error0];
2871 /* verify speculative enqueue, maybe switch current next frame */
2872 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
2873 n_left_to_next, bi0, next0);
2875 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2877 return frame->n_vectors;
2881 VLIB_REGISTER_NODE (ip6_hop_by_hop_node) =
2883 .function = ip6_hop_by_hop,
2884 .name = "ip6-hop-by-hop",
2885 .sibling_of = "ip6-lookup",
2886 .vector_size = sizeof (u32),
2887 .format_trace = format_ip6_hop_by_hop_trace,
2888 .type = VLIB_NODE_TYPE_INTERNAL,
2889 .n_errors = ARRAY_LEN (ip6_hop_by_hop_error_strings),
2890 .error_strings = ip6_hop_by_hop_error_strings,
2895 VLIB_NODE_FUNCTION_MULTIARCH (ip6_hop_by_hop_node, ip6_hop_by_hop);
2897 static clib_error_t *
2898 ip6_hop_by_hop_init (vlib_main_t * vm)
2900 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2901 memset (hm->options, 0, sizeof (hm->options));
2902 memset (hm->trace, 0, sizeof (hm->trace));
2903 hm->next_override = IP6_LOOKUP_NEXT_POP_HOP_BY_HOP;
2907 VLIB_INIT_FUNCTION (ip6_hop_by_hop_init);
2910 ip6_hbh_set_next_override (uword next)
2912 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2914 hm->next_override = next;
2918 ip6_hbh_register_option (u8 option,
2919 int options (vlib_buffer_t * b, ip6_header_t * ip,
2920 ip6_hop_by_hop_option_t * opt),
2921 u8 * trace (u8 * s, ip6_hop_by_hop_option_t * opt))
2923 ip6_main_t *im = &ip6_main;
2924 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2926 ASSERT (option < ARRAY_LEN (hm->options));
2928 /* Already registered */
2929 if (hm->options[option])
2932 hm->options[option] = options;
2933 hm->trace[option] = trace;
2935 /* Set global variable */
2936 im->hbh_enabled = 1;
2942 ip6_hbh_unregister_option (u8 option)
2944 ip6_main_t *im = &ip6_main;
2945 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2947 ASSERT (option < ARRAY_LEN (hm->options));
2949 /* Not registered */
2950 if (!hm->options[option])
2953 hm->options[option] = NULL;
2954 hm->trace[option] = NULL;
2956 /* Disable global knob if this was the last option configured */
2959 for (i = 0; i < 256; i++)
2961 if (hm->options[option])
2968 im->hbh_enabled = 0;
2973 /* Global IP6 main. */
2974 ip6_main_t ip6_main;
2976 static clib_error_t *
2977 ip6_lookup_init (vlib_main_t * vm)
2979 ip6_main_t *im = &ip6_main;
2980 clib_error_t *error;
2983 if ((error = vlib_call_init_function (vm, vnet_feature_init)))
2986 for (i = 0; i < ARRAY_LEN (im->fib_masks); i++)
2993 for (j = 0; j < i0; j++)
2994 im->fib_masks[i].as_u32[j] = ~0;
2997 im->fib_masks[i].as_u32[i0] =
2998 clib_host_to_net_u32 (pow2_mask (i1) << (32 - i1));
3001 ip_lookup_init (&im->lookup_main, /* is_ip6 */ 1);
3003 if (im->lookup_table_nbuckets == 0)
3004 im->lookup_table_nbuckets = IP6_FIB_DEFAULT_HASH_NUM_BUCKETS;
3006 im->lookup_table_nbuckets = 1 << max_log2 (im->lookup_table_nbuckets);
3008 if (im->lookup_table_size == 0)
3009 im->lookup_table_size = IP6_FIB_DEFAULT_HASH_MEMORY_SIZE;
3011 BV (clib_bihash_init) (&(im->ip6_table[IP6_FIB_TABLE_FWDING].ip6_hash),
3012 "ip6 FIB fwding table",
3013 im->lookup_table_nbuckets, im->lookup_table_size);
3014 BV (clib_bihash_init) (&im->ip6_table[IP6_FIB_TABLE_NON_FWDING].ip6_hash,
3015 "ip6 FIB non-fwding table",
3016 im->lookup_table_nbuckets, im->lookup_table_size);
3018 /* Create FIB with index 0 and table id of 0. */
3019 fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6, 0,
3020 FIB_SOURCE_DEFAULT_ROUTE);
3021 mfib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6, 0,
3022 MFIB_SOURCE_DEFAULT_ROUTE);
3026 pn = pg_get_node (ip6_lookup_node.index);
3027 pn->unformat_edit = unformat_pg_ip6_header;
3030 /* Unless explicitly configured, don't process HBH options */
3031 im->hbh_enabled = 0;
3034 icmp6_neighbor_solicitation_header_t p;
3036 memset (&p, 0, sizeof (p));
3038 p.ip.ip_version_traffic_class_and_flow_label =
3039 clib_host_to_net_u32 (0x6 << 28);
3040 p.ip.payload_length =
3041 clib_host_to_net_u16 (sizeof (p) -
3043 (icmp6_neighbor_solicitation_header_t, neighbor));
3044 p.ip.protocol = IP_PROTOCOL_ICMP6;
3045 p.ip.hop_limit = 255;
3046 ip6_set_solicited_node_multicast_address (&p.ip.dst_address, 0);
3048 p.neighbor.icmp.type = ICMP6_neighbor_solicitation;
3050 p.link_layer_option.header.type =
3051 ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address;
3052 p.link_layer_option.header.n_data_u64s =
3053 sizeof (p.link_layer_option) / sizeof (u64);
3055 vlib_packet_template_init (vm,
3056 &im->discover_neighbor_packet_template,
3058 /* alloc chunk size */ 8,
3059 "ip6 neighbor discovery");
3065 VLIB_INIT_FUNCTION (ip6_lookup_init);
3068 ip6_link_local_address_from_ethernet_mac_address (ip6_address_t * ip,
3071 ip->as_u64[0] = clib_host_to_net_u64 (0xFE80000000000000ULL);
3072 /* Invert the "u" bit */
3073 ip->as_u8[8] = mac[0] ^ (1 << 1);
3074 ip->as_u8[9] = mac[1];
3075 ip->as_u8[10] = mac[2];
3076 ip->as_u8[11] = 0xFF;
3077 ip->as_u8[12] = 0xFE;
3078 ip->as_u8[13] = mac[3];
3079 ip->as_u8[14] = mac[4];
3080 ip->as_u8[15] = mac[5];
3084 ip6_ethernet_mac_address_from_link_local_address (u8 * mac,
3087 /* Invert the previously inverted "u" bit */
3088 mac[0] = ip->as_u8[8] ^ (1 << 1);
3089 mac[1] = ip->as_u8[9];
3090 mac[2] = ip->as_u8[10];
3091 mac[3] = ip->as_u8[13];
3092 mac[4] = ip->as_u8[14];
3093 mac[5] = ip->as_u8[15];
3096 static clib_error_t *
3097 test_ip6_link_command_fn (vlib_main_t * vm,
3098 unformat_input_t * input, vlib_cli_command_t * cmd)
3101 ip6_address_t _a, *a = &_a;
3103 if (unformat (input, "%U", unformat_ethernet_address, mac))
3105 ip6_link_local_address_from_ethernet_mac_address (a, mac);
3106 vlib_cli_output (vm, "Link local address: %U", format_ip6_address, a);
3107 ip6_ethernet_mac_address_from_link_local_address (mac, a);
3108 vlib_cli_output (vm, "Original MAC address: %U",
3109 format_ethernet_address, mac);
3116 * This command converts the given MAC Address into an IPv6 link-local
3120 * Example of how to create an IPv6 link-local address:
3121 * @cliexstart{test ip6 link 16:d9:e0:91:79:86}
3122 * Link local address: fe80::14d9:e0ff:fe91:7986
3123 * Original MAC address: 16:d9:e0:91:79:86
3127 VLIB_CLI_COMMAND (test_link_command, static) =
3129 .path = "test ip6 link",
3130 .function = test_ip6_link_command_fn,
3131 .short_help = "test ip6 link <mac-address>",
3136 vnet_set_ip6_flow_hash (u32 table_id, u32 flow_hash_config)
3140 fib_index = fib_table_find (FIB_PROTOCOL_IP6, table_id);
3142 if (~0 == fib_index)
3143 return VNET_API_ERROR_NO_SUCH_FIB;
3145 fib_table_set_flow_hash_config (fib_index, FIB_PROTOCOL_IP6,
3151 static clib_error_t *
3152 set_ip6_flow_hash_command_fn (vlib_main_t * vm,
3153 unformat_input_t * input,
3154 vlib_cli_command_t * cmd)
3158 u32 flow_hash_config = 0;
3161 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
3163 if (unformat (input, "table %d", &table_id))
3166 else if (unformat (input, #a)) { flow_hash_config |= v; matched=1;}
3167 foreach_flow_hash_bit
3174 return clib_error_return (0, "unknown input `%U'",
3175 format_unformat_error, input);
3177 rv = vnet_set_ip6_flow_hash (table_id, flow_hash_config);
3184 return clib_error_return (0, "no such FIB table %d", table_id);
3187 clib_warning ("BUG: illegal flow hash config 0x%x", flow_hash_config);
3195 * Configure the set of IPv6 fields used by the flow hash.
3199 * Example of how to set the flow hash on a given table:
3200 * @cliexcmd{set ip6 flow-hash table 8 dst sport dport proto}
3202 * Example of display the configured flow hash:
3203 * @cliexstart{show ip6 fib}
3204 * ipv6-VRF:0, fib_index 0, flow hash: src dst sport dport proto
3207 * [@0]: dpo-load-balance: [index:5 buckets:1 uRPF:5 to:[0:0]]
3208 * [0] [@0]: dpo-drop ip6
3211 * [@0]: dpo-load-balance: [index:10 buckets:1 uRPF:10 to:[0:0]]
3212 * [0] [@2]: dpo-receive
3215 * [@0]: dpo-load-balance: [index:8 buckets:1 uRPF:8 to:[0:0]]
3216 * [0] [@2]: dpo-receive
3219 * [@0]: dpo-load-balance: [index:7 buckets:1 uRPF:7 to:[0:0]]
3220 * [0] [@2]: dpo-receive
3223 * [@0]: dpo-load-balance: [index:9 buckets:1 uRPF:9 to:[0:0]]
3224 * [0] [@2]: dpo-receive
3225 * ff02::1:ff00:0/104
3227 * [@0]: dpo-load-balance: [index:6 buckets:1 uRPF:6 to:[0:0]]
3228 * [0] [@2]: dpo-receive
3229 * ipv6-VRF:8, fib_index 1, flow hash: dst sport dport proto
3232 * [@0]: dpo-load-balance: [index:21 buckets:1 uRPF:20 to:[0:0]]
3233 * [0] [@0]: dpo-drop ip6
3236 * [@0]: dpo-load-balance: [index:27 buckets:1 uRPF:26 to:[0:0]]
3237 * [0] [@4]: ipv6-glean: af_packet0
3240 * [@0]: dpo-load-balance: [index:28 buckets:1 uRPF:27 to:[0:0]]
3241 * [0] [@2]: dpo-receive: @::a:1:1:0:7 on af_packet0
3244 * [@0]: dpo-load-balance: [index:26 buckets:1 uRPF:25 to:[0:0]]
3245 * [0] [@2]: dpo-receive
3246 * fe80::fe:3eff:fe3e:9222/128
3248 * [@0]: dpo-load-balance: [index:29 buckets:1 uRPF:28 to:[0:0]]
3249 * [0] [@2]: dpo-receive: fe80::fe:3eff:fe3e:9222 on af_packet0
3252 * [@0]: dpo-load-balance: [index:24 buckets:1 uRPF:23 to:[0:0]]
3253 * [0] [@2]: dpo-receive
3256 * [@0]: dpo-load-balance: [index:23 buckets:1 uRPF:22 to:[0:0]]
3257 * [0] [@2]: dpo-receive
3260 * [@0]: dpo-load-balance: [index:25 buckets:1 uRPF:24 to:[0:0]]
3261 * [0] [@2]: dpo-receive
3262 * ff02::1:ff00:0/104
3264 * [@0]: dpo-load-balance: [index:22 buckets:1 uRPF:21 to:[0:0]]
3265 * [0] [@2]: dpo-receive
3270 VLIB_CLI_COMMAND (set_ip6_flow_hash_command, static) =
3272 .path = "set ip6 flow-hash",
3274 "set ip6 flow-hash table <table-id> [src] [dst] [sport] [dport] [proto] [reverse]",
3275 .function = set_ip6_flow_hash_command_fn,
3279 static clib_error_t *
3280 show_ip6_local_command_fn (vlib_main_t * vm,
3281 unformat_input_t * input, vlib_cli_command_t * cmd)
3283 ip6_main_t *im = &ip6_main;
3284 ip_lookup_main_t *lm = &im->lookup_main;
3287 vlib_cli_output (vm, "Protocols handled by ip6_local");
3288 for (i = 0; i < ARRAY_LEN (lm->local_next_by_ip_protocol); i++)
3290 if (lm->local_next_by_ip_protocol[i] != IP_LOCAL_NEXT_PUNT)
3293 u32 node_index = vlib_get_node (vm,
3294 ip6_local_node.index)->
3295 next_nodes[lm->local_next_by_ip_protocol[i]];
3296 vlib_cli_output (vm, "%d: %U", i, format_vlib_node_name, vm,
3306 * Display the set of protocols handled by the local IPv6 stack.
3309 * Example of how to display local protocol table:
3310 * @cliexstart{show ip6 local}
3311 * Protocols handled by ip6_local
3319 VLIB_CLI_COMMAND (show_ip6_local, static) =
3321 .path = "show ip6 local",
3322 .function = show_ip6_local_command_fn,
3323 .short_help = "show ip6 local",
3328 vnet_set_ip6_classify_intfc (vlib_main_t * vm, u32 sw_if_index,
3331 vnet_main_t *vnm = vnet_get_main ();
3332 vnet_interface_main_t *im = &vnm->interface_main;
3333 ip6_main_t *ipm = &ip6_main;
3334 ip_lookup_main_t *lm = &ipm->lookup_main;
3335 vnet_classify_main_t *cm = &vnet_classify_main;
3336 ip6_address_t *if_addr;
3338 if (pool_is_free_index (im->sw_interfaces, sw_if_index))
3339 return VNET_API_ERROR_NO_MATCHING_INTERFACE;
3341 if (table_index != ~0 && pool_is_free_index (cm->tables, table_index))
3342 return VNET_API_ERROR_NO_SUCH_ENTRY;
3344 vec_validate (lm->classify_table_index_by_sw_if_index, sw_if_index);
3345 lm->classify_table_index_by_sw_if_index[sw_if_index] = table_index;
3347 if_addr = ip6_interface_first_address (ipm, sw_if_index);
3349 if (NULL != if_addr)
3351 fib_prefix_t pfx = {
3353 .fp_proto = FIB_PROTOCOL_IP6,
3354 .fp_addr.ip6 = *if_addr,
3358 fib_index = fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4,
3362 if (table_index != (u32) ~ 0)
3364 dpo_id_t dpo = DPO_INVALID;
3369 classify_dpo_create (DPO_PROTO_IP6, table_index));
3371 fib_table_entry_special_dpo_add (fib_index,
3373 FIB_SOURCE_CLASSIFY,
3374 FIB_ENTRY_FLAG_NONE, &dpo);
3379 fib_table_entry_special_remove (fib_index,
3380 &pfx, FIB_SOURCE_CLASSIFY);
3387 static clib_error_t *
3388 set_ip6_classify_command_fn (vlib_main_t * vm,
3389 unformat_input_t * input,
3390 vlib_cli_command_t * cmd)
3392 u32 table_index = ~0;
3393 int table_index_set = 0;
3394 u32 sw_if_index = ~0;
3397 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
3399 if (unformat (input, "table-index %d", &table_index))
3400 table_index_set = 1;
3401 else if (unformat (input, "intfc %U", unformat_vnet_sw_interface,
3402 vnet_get_main (), &sw_if_index))
3408 if (table_index_set == 0)
3409 return clib_error_return (0, "classify table-index must be specified");
3411 if (sw_if_index == ~0)
3412 return clib_error_return (0, "interface / subif must be specified");
3414 rv = vnet_set_ip6_classify_intfc (vm, sw_if_index, table_index);
3421 case VNET_API_ERROR_NO_MATCHING_INTERFACE:
3422 return clib_error_return (0, "No such interface");
3424 case VNET_API_ERROR_NO_SUCH_ENTRY:
3425 return clib_error_return (0, "No such classifier table");
3431 * Assign a classification table to an interface. The classification
3432 * table is created using the '<em>classify table</em>' and '<em>classify session</em>'
3433 * commands. Once the table is create, use this command to filter packets
3437 * Example of how to assign a classification table to an interface:
3438 * @cliexcmd{set ip6 classify intfc GigabitEthernet2/0/0 table-index 1}
3441 VLIB_CLI_COMMAND (set_ip6_classify_command, static) =
3443 .path = "set ip6 classify",
3445 "set ip6 classify intfc <interface> table-index <classify-idx>",
3446 .function = set_ip6_classify_command_fn,
3450 static clib_error_t *
3451 ip6_config (vlib_main_t * vm, unformat_input_t * input)
3453 ip6_main_t *im = &ip6_main;
3458 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
3460 if (unformat (input, "hash-buckets %d", &tmp))
3462 else if (unformat (input, "heap-size %dm", &tmp))
3463 heapsize = ((u64) tmp) << 20;
3464 else if (unformat (input, "heap-size %dM", &tmp))
3465 heapsize = ((u64) tmp) << 20;
3466 else if (unformat (input, "heap-size %dg", &tmp))
3467 heapsize = ((u64) tmp) << 30;
3468 else if (unformat (input, "heap-size %dG", &tmp))
3469 heapsize = ((u64) tmp) << 30;
3471 return clib_error_return (0, "unknown input '%U'",
3472 format_unformat_error, input);
3475 im->lookup_table_nbuckets = nbuckets;
3476 im->lookup_table_size = heapsize;
3481 VLIB_EARLY_CONFIG_FUNCTION (ip6_config, "ip6");
3484 * fd.io coding-style-patch-verification: ON
3487 * eval: (c-set-style "gnu")