2 * Copyright (c) 2016 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
16 * ip/ip6_forward.c: IP v6 forwarding
18 * Copyright (c) 2008 Eliot Dresselhaus
20 * Permission is hereby granted, free of charge, to any person obtaining
21 * a copy of this software and associated documentation files (the
22 * "Software"), to deal in the Software without restriction, including
23 * without limitation the rights to use, copy, modify, merge, publish,
24 * distribute, sublicense, and/or sell copies of the Software, and to
25 * permit persons to whom the Software is furnished to do so, subject to
26 * the following conditions:
28 * The above copyright notice and this permission notice shall be
29 * included in all copies or substantial portions of the Software.
31 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
32 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
33 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
34 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
35 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
36 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
37 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
40 #include <vnet/vnet.h>
41 #include <vnet/ip/ip.h>
42 #include <vnet/ethernet/ethernet.h> /* for ethernet_header_t */
43 #include <vnet/srp/srp.h> /* for srp_hw_interface_class */
44 #include <vppinfra/cache.h>
45 #include <vnet/fib/fib_urpf_list.h> /* for FIB uRPF check */
46 #include <vnet/fib/ip6_fib.h>
47 #include <vnet/mfib/ip6_mfib.h>
48 #include <vnet/dpo/load_balance.h>
49 #include <vnet/dpo/classify_dpo.h>
51 #include <vppinfra/bihash_template.c>
53 /* Flag used by IOAM code. Classifier sets it pop-hop-by-hop checks it */
54 #define OI_DECAP 0x80000000
58 * @brief IPv6 Forwarding.
60 * This file contains the source code for IPv6 forwarding.
64 ip6_forward_next_trace (vlib_main_t * vm,
65 vlib_node_runtime_t * node,
67 vlib_rx_or_tx_t which_adj_index);
70 ip6_lookup_inline (vlib_main_t * vm,
71 vlib_node_runtime_t * node, vlib_frame_t * frame)
73 ip6_main_t *im = &ip6_main;
74 vlib_combined_counter_main_t *cm = &load_balance_main.lbm_to_counters;
75 u32 n_left_from, n_left_to_next, *from, *to_next;
76 ip_lookup_next_t next;
77 u32 cpu_index = os_get_cpu_number ();
79 from = vlib_frame_vector_args (frame);
80 n_left_from = frame->n_vectors;
81 next = node->cached_next_index;
83 while (n_left_from > 0)
85 vlib_get_next_frame (vm, node, next, to_next, n_left_to_next);
87 while (n_left_from >= 4 && n_left_to_next >= 2)
89 vlib_buffer_t *p0, *p1;
90 u32 pi0, pi1, lbi0, lbi1, wrong_next;
91 ip_lookup_next_t next0, next1;
92 ip6_header_t *ip0, *ip1;
93 ip6_address_t *dst_addr0, *dst_addr1;
94 u32 fib_index0, fib_index1;
95 u32 flow_hash_config0, flow_hash_config1;
96 const dpo_id_t *dpo0, *dpo1;
97 const load_balance_t *lb0, *lb1;
99 /* Prefetch next iteration. */
101 vlib_buffer_t *p2, *p3;
103 p2 = vlib_get_buffer (vm, from[2]);
104 p3 = vlib_get_buffer (vm, from[3]);
106 vlib_prefetch_buffer_header (p2, LOAD);
107 vlib_prefetch_buffer_header (p3, LOAD);
108 CLIB_PREFETCH (p2->data, sizeof (ip0[0]), LOAD);
109 CLIB_PREFETCH (p3->data, sizeof (ip0[0]), LOAD);
112 pi0 = to_next[0] = from[0];
113 pi1 = to_next[1] = from[1];
115 p0 = vlib_get_buffer (vm, pi0);
116 p1 = vlib_get_buffer (vm, pi1);
118 ip0 = vlib_buffer_get_current (p0);
119 ip1 = vlib_buffer_get_current (p1);
121 dst_addr0 = &ip0->dst_address;
122 dst_addr1 = &ip1->dst_address;
125 vec_elt (im->fib_index_by_sw_if_index,
126 vnet_buffer (p0)->sw_if_index[VLIB_RX]);
128 vec_elt (im->fib_index_by_sw_if_index,
129 vnet_buffer (p1)->sw_if_index[VLIB_RX]);
131 fib_index0 = (vnet_buffer (p0)->sw_if_index[VLIB_TX] == (u32) ~ 0) ?
132 fib_index0 : vnet_buffer (p0)->sw_if_index[VLIB_TX];
133 fib_index1 = (vnet_buffer (p1)->sw_if_index[VLIB_TX] == (u32) ~ 0) ?
134 fib_index1 : vnet_buffer (p1)->sw_if_index[VLIB_TX];
136 lbi0 = ip6_fib_table_fwding_lookup (im, fib_index0, dst_addr0);
137 lbi1 = ip6_fib_table_fwding_lookup (im, fib_index1, dst_addr1);
139 lb0 = load_balance_get (lbi0);
140 lb1 = load_balance_get (lbi1);
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 if (PREDICT_FALSE (lb1->lb_n_buckets > 1))
152 flow_hash_config1 = lb1->lb_hash_config;
153 vnet_buffer (p1)->ip.flow_hash =
154 ip6_compute_flow_hash (ip1, flow_hash_config1);
157 ASSERT (lb0->lb_n_buckets > 0);
158 ASSERT (lb1->lb_n_buckets > 0);
159 ASSERT (is_pow2 (lb0->lb_n_buckets));
160 ASSERT (is_pow2 (lb1->lb_n_buckets));
161 dpo0 = load_balance_get_bucket_i (lb0,
162 (vnet_buffer (p0)->ip.flow_hash &
163 lb0->lb_n_buckets_minus_1));
164 dpo1 = load_balance_get_bucket_i (lb1,
165 (vnet_buffer (p1)->ip.flow_hash &
166 lb1->lb_n_buckets_minus_1));
168 next0 = dpo0->dpoi_next_node;
169 next1 = dpo1->dpoi_next_node;
171 /* Only process the HBH Option Header if explicitly configured to do so */
173 (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
175 next0 = (dpo_is_adj (dpo0) && im->hbh_enabled) ?
176 (ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next0;
179 (ip1->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
181 next1 = (dpo_is_adj (dpo1) && im->hbh_enabled) ?
182 (ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next1;
184 vnet_buffer (p0)->ip.adj_index[VLIB_TX] = dpo0->dpoi_index;
185 vnet_buffer (p1)->ip.adj_index[VLIB_TX] = dpo1->dpoi_index;
187 vlib_increment_combined_counter
188 (cm, cpu_index, lbi0, 1, vlib_buffer_length_in_chain (vm, p0));
189 vlib_increment_combined_counter
190 (cm, cpu_index, lbi1, 1, vlib_buffer_length_in_chain (vm, p1));
197 wrong_next = (next0 != next) + 2 * (next1 != next);
198 if (PREDICT_FALSE (wrong_next != 0))
207 vlib_set_next_frame_buffer (vm, node, next0, pi0);
214 vlib_set_next_frame_buffer (vm, node, next1, pi1);
221 vlib_set_next_frame_buffer (vm, node, next0, pi0);
222 vlib_set_next_frame_buffer (vm, node, next1, pi1);
226 vlib_put_next_frame (vm, node, next, n_left_to_next);
228 vlib_get_next_frame (vm, node, next, to_next,
235 while (n_left_from > 0 && n_left_to_next > 0)
240 ip_lookup_next_t next0;
242 ip6_address_t *dst_addr0;
243 u32 fib_index0, flow_hash_config0;
244 const dpo_id_t *dpo0;
249 p0 = vlib_get_buffer (vm, pi0);
251 ip0 = vlib_buffer_get_current (p0);
253 dst_addr0 = &ip0->dst_address;
256 vec_elt (im->fib_index_by_sw_if_index,
257 vnet_buffer (p0)->sw_if_index[VLIB_RX]);
259 (vnet_buffer (p0)->sw_if_index[VLIB_TX] ==
260 (u32) ~ 0) ? fib_index0 : vnet_buffer (p0)->sw_if_index[VLIB_TX];
262 flow_hash_config0 = ip6_fib_get (fib_index0)->flow_hash_config;
264 lbi0 = ip6_fib_table_fwding_lookup (im, fib_index0, dst_addr0);
266 lb0 = load_balance_get (lbi0);
268 vnet_buffer (p0)->ip.flow_hash = 0;
270 if (PREDICT_FALSE (lb0->lb_n_buckets > 1))
272 flow_hash_config0 = lb0->lb_hash_config;
273 vnet_buffer (p0)->ip.flow_hash =
274 ip6_compute_flow_hash (ip0, flow_hash_config0);
277 ASSERT (lb0->lb_n_buckets > 0);
278 ASSERT (is_pow2 (lb0->lb_n_buckets));
279 dpo0 = load_balance_get_bucket_i (lb0,
280 (vnet_buffer (p0)->ip.flow_hash &
281 lb0->lb_n_buckets_minus_1));
282 next0 = dpo0->dpoi_next_node;
284 /* Only process the HBH Option Header if explicitly configured to do so */
286 (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
288 next0 = (dpo_is_adj (dpo0) && im->hbh_enabled) ?
289 (ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next0;
291 vnet_buffer (p0)->ip.adj_index[VLIB_TX] = dpo0->dpoi_index;
293 vlib_increment_combined_counter
294 (cm, cpu_index, lbi0, 1, vlib_buffer_length_in_chain (vm, p0));
301 if (PREDICT_FALSE (next0 != next))
304 vlib_put_next_frame (vm, node, next, n_left_to_next);
306 vlib_get_next_frame (vm, node, next, to_next, n_left_to_next);
313 vlib_put_next_frame (vm, node, next, n_left_to_next);
316 if (node->flags & VLIB_NODE_FLAG_TRACE)
317 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
319 return frame->n_vectors;
323 ip6_add_interface_routes (vnet_main_t * vnm, u32 sw_if_index,
324 ip6_main_t * im, u32 fib_index,
325 ip_interface_address_t * a)
327 ip_lookup_main_t *lm = &im->lookup_main;
328 ip6_address_t *address = ip_interface_address_get_address (lm, a);
330 .fp_len = a->address_length,
331 .fp_proto = FIB_PROTOCOL_IP6,
332 .fp_addr.ip6 = *address,
335 a->neighbor_probe_adj_index = ~0;
336 if (a->address_length < 128)
338 fib_node_index_t fei;
340 fei = fib_table_entry_update_one_path (fib_index, &pfx, FIB_SOURCE_INTERFACE, (FIB_ENTRY_FLAG_CONNECTED | FIB_ENTRY_FLAG_ATTACHED), FIB_PROTOCOL_IP6, NULL, /* No next-hop address */
341 sw_if_index, ~0, // invalid FIB index
342 1, NULL, // no label stack
343 FIB_ROUTE_PATH_FLAG_NONE);
344 a->neighbor_probe_adj_index = fib_entry_get_adj (fei);
348 if (sw_if_index < vec_len (lm->classify_table_index_by_sw_if_index))
350 u32 classify_table_index =
351 lm->classify_table_index_by_sw_if_index[sw_if_index];
352 if (classify_table_index != (u32) ~ 0)
354 dpo_id_t dpo = DPO_INVALID;
359 classify_dpo_create (DPO_PROTO_IP6, classify_table_index));
361 fib_table_entry_special_dpo_add (fib_index,
364 FIB_ENTRY_FLAG_NONE, &dpo);
369 fib_table_entry_update_one_path (fib_index, &pfx, FIB_SOURCE_INTERFACE, (FIB_ENTRY_FLAG_CONNECTED | FIB_ENTRY_FLAG_LOCAL), FIB_PROTOCOL_IP6, &pfx.fp_addr, sw_if_index, ~0, // invalid FIB index
370 1, NULL, FIB_ROUTE_PATH_FLAG_NONE);
374 ip6_del_interface_routes (ip6_main_t * im,
376 ip6_address_t * address, u32 address_length)
379 .fp_len = address_length,
380 .fp_proto = FIB_PROTOCOL_IP6,
381 .fp_addr.ip6 = *address,
384 if (pfx.fp_len < 128)
386 fib_table_entry_delete (fib_index, &pfx, FIB_SOURCE_INTERFACE);
391 fib_table_entry_delete (fib_index, &pfx, FIB_SOURCE_INTERFACE);
395 ip6_sw_interface_enable_disable (u32 sw_if_index, u32 is_enable)
397 ip6_main_t *im = &ip6_main;
399 vec_validate_init_empty (im->ip_enabled_by_sw_if_index, sw_if_index, 0);
402 * enable/disable only on the 1<->0 transition
406 if (1 != ++im->ip_enabled_by_sw_if_index[sw_if_index])
411 /* The ref count is 0 when an address is removed from an interface that has
412 * no address - this is not a ciritical error */
413 if (0 == im->ip_enabled_by_sw_if_index[sw_if_index] ||
414 0 != --im->ip_enabled_by_sw_if_index[sw_if_index])
418 vnet_feature_enable_disable ("ip6-unicast", "ip6-lookup", sw_if_index,
421 vnet_feature_enable_disable ("ip6-multicast", "ip6-mfib-forward-lookup",
422 sw_if_index, is_enable, 0, 0);
426 /* get first interface address */
428 ip6_interface_first_address (ip6_main_t * im, u32 sw_if_index)
430 ip_lookup_main_t *lm = &im->lookup_main;
431 ip_interface_address_t *ia = 0;
432 ip6_address_t *result = 0;
435 foreach_ip_interface_address (lm, ia, sw_if_index,
436 1 /* honor unnumbered */,
438 ip6_address_t * a = ip_interface_address_get_address (lm, ia);
447 ip6_add_del_interface_address (vlib_main_t * vm,
449 ip6_address_t * address,
450 u32 address_length, u32 is_del)
452 vnet_main_t *vnm = vnet_get_main ();
453 ip6_main_t *im = &ip6_main;
454 ip_lookup_main_t *lm = &im->lookup_main;
456 u32 if_address_index;
457 ip6_address_fib_t ip6_af, *addr_fib = 0;
459 vec_validate (im->fib_index_by_sw_if_index, sw_if_index);
460 vec_validate (im->mfib_index_by_sw_if_index, sw_if_index);
462 ip6_addr_fib_init (&ip6_af, address,
463 vec_elt (im->fib_index_by_sw_if_index, sw_if_index));
464 vec_add1 (addr_fib, ip6_af);
467 uword elts_before = pool_elts (lm->if_address_pool);
469 error = ip_interface_address_add_del
470 (lm, sw_if_index, addr_fib, address_length, is_del, &if_address_index);
474 /* Pool did not grow: add duplicate address. */
475 if (elts_before == pool_elts (lm->if_address_pool))
479 ip6_sw_interface_enable_disable (sw_if_index, !is_del);
482 ip6_del_interface_routes (im, ip6_af.fib_index, address, address_length);
484 ip6_add_interface_routes (vnm, sw_if_index,
485 im, ip6_af.fib_index,
486 pool_elt_at_index (lm->if_address_pool,
490 ip6_add_del_interface_address_callback_t *cb;
491 vec_foreach (cb, im->add_del_interface_address_callbacks)
492 cb->function (im, cb->function_opaque, sw_if_index,
493 address, address_length, if_address_index, is_del);
502 ip6_sw_interface_admin_up_down (vnet_main_t * vnm, u32 sw_if_index, u32 flags)
504 ip6_main_t *im = &ip6_main;
505 ip_interface_address_t *ia;
507 u32 is_admin_up, fib_index;
509 /* Fill in lookup tables with default table (0). */
510 vec_validate (im->fib_index_by_sw_if_index, sw_if_index);
512 vec_validate_init_empty (im->
513 lookup_main.if_address_pool_index_by_sw_if_index,
516 is_admin_up = (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) != 0;
518 fib_index = vec_elt (im->fib_index_by_sw_if_index, sw_if_index);
521 foreach_ip_interface_address (&im->lookup_main, ia, sw_if_index,
522 0 /* honor unnumbered */,
524 a = ip_interface_address_get_address (&im->lookup_main, ia);
526 ip6_add_interface_routes (vnm, sw_if_index,
530 ip6_del_interface_routes (im, fib_index,
531 a, ia->address_length);
538 VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION (ip6_sw_interface_admin_up_down);
540 /* Built-in ip6 unicast rx feature path definition */
542 VNET_FEATURE_ARC_INIT (ip6_unicast, static) =
544 .arc_name = "ip6-unicast",
545 .start_nodes = VNET_FEATURES ("ip6-input"),
546 .arc_index_ptr = &ip6_main.lookup_main.ucast_feature_arc_index,
549 VNET_FEATURE_INIT (ip6_flow_classify, static) =
551 .arc_name = "ip6-unicast",
552 .node_name = "ip6-flow-classify",
553 .runs_before = VNET_FEATURES ("ip6-inacl"),
556 VNET_FEATURE_INIT (ip6_inacl, static) =
558 .arc_name = "ip6-unicast",
559 .node_name = "ip6-inacl",
560 .runs_before = VNET_FEATURES ("ip6-policer-classify"),
563 VNET_FEATURE_INIT (ip6_policer_classify, static) =
565 .arc_name = "ip6-unicast",
566 .node_name = "ip6-policer-classify",
567 .runs_before = VNET_FEATURES ("ipsec-input-ip6"),
570 VNET_FEATURE_INIT (ip6_ipsec, static) =
572 .arc_name = "ip6-unicast",
573 .node_name = "ipsec-input-ip6",
574 .runs_before = VNET_FEATURES ("l2tp-decap"),
577 VNET_FEATURE_INIT (ip6_l2tp, static) =
579 .arc_name = "ip6-unicast",
580 .node_name = "l2tp-decap",
581 .runs_before = VNET_FEATURES ("vpath-input-ip6"),
584 VNET_FEATURE_INIT (ip6_vpath, static) =
586 .arc_name = "ip6-unicast",
587 .node_name = "vpath-input-ip6",
588 .runs_before = VNET_FEATURES ("ip6-vxlan-bypass"),
591 VNET_FEATURE_INIT (ip6_vxlan_bypass, static) =
593 .arc_name = "ip6-unicast",
594 .node_name = "ip6-vxlan-bypass",
595 .runs_before = VNET_FEATURES ("ip6-lookup"),
598 VNET_FEATURE_INIT (ip6_lookup, static) =
600 .arc_name = "ip6-unicast",
601 .node_name = "ip6-lookup",
602 .runs_before = VNET_FEATURES ("ip6-drop"),
605 VNET_FEATURE_INIT (ip6_drop, static) =
607 .arc_name = "ip6-unicast",
608 .node_name = "ip6-drop",
609 .runs_before = 0, /*last feature*/
612 /* Built-in ip6 multicast rx feature path definition (none now) */
613 VNET_FEATURE_ARC_INIT (ip6_multicast, static) =
615 .arc_name = "ip6-multicast",
616 .start_nodes = VNET_FEATURES ("ip6-input"),
617 .arc_index_ptr = &ip6_main.lookup_main.mcast_feature_arc_index,
620 VNET_FEATURE_INIT (ip6_vpath_mc, static) = {
621 .arc_name = "ip6-multicast",
622 .node_name = "vpath-input-ip6",
623 .runs_before = VNET_FEATURES ("ip6-mfib-forward-lookup"),
626 VNET_FEATURE_INIT (ip6_mc_lookup, static) = {
627 .arc_name = "ip6-multicast",
628 .node_name = "ip6-mfib-forward-lookup",
629 .runs_before = VNET_FEATURES ("ip6-drop"),
632 VNET_FEATURE_INIT (ip6_drop_mc, static) = {
633 .arc_name = "ip6-multicast",
634 .node_name = "ip6-drop",
635 .runs_before = 0, /* last feature */
638 /* Built-in ip4 tx feature path definition */
639 VNET_FEATURE_ARC_INIT (ip6_output, static) =
641 .arc_name = "ip6-output",
642 .start_nodes = VNET_FEATURES ("ip6-rewrite", "ip6-midchain"),
643 .arc_index_ptr = &ip6_main.lookup_main.output_feature_arc_index,
646 VNET_FEATURE_INIT (ip6_ipsec_output, static) = {
647 .arc_name = "ip6-output",
648 .node_name = "ipsec-output-ip6",
649 .runs_before = VNET_FEATURES ("interface-output"),
652 VNET_FEATURE_INIT (ip6_interface_output, static) = {
653 .arc_name = "ip6-output",
654 .node_name = "interface-output",
655 .runs_before = 0, /* not before any other features */
660 ip6_sw_interface_add_del (vnet_main_t * vnm, u32 sw_if_index, u32 is_add)
662 vnet_feature_enable_disable ("ip6-unicast", "ip6-drop", sw_if_index,
665 vnet_feature_enable_disable ("ip6-multicast", "ip6-drop", sw_if_index,
668 vnet_feature_enable_disable ("ip6-output", "interface-output", sw_if_index,
671 return /* no error */ 0;
674 VNET_SW_INTERFACE_ADD_DEL_FUNCTION (ip6_sw_interface_add_del);
677 ip6_lookup (vlib_main_t * vm,
678 vlib_node_runtime_t * node, vlib_frame_t * frame)
680 return ip6_lookup_inline (vm, node, frame);
683 static u8 *format_ip6_lookup_trace (u8 * s, va_list * args);
686 VLIB_REGISTER_NODE (ip6_lookup_node) =
688 .function = ip6_lookup,
689 .name = "ip6-lookup",
690 .vector_size = sizeof (u32),
691 .format_trace = format_ip6_lookup_trace,
692 .n_next_nodes = IP6_LOOKUP_N_NEXT,
693 .next_nodes = IP6_LOOKUP_NEXT_NODES,
697 VLIB_NODE_FUNCTION_MULTIARCH (ip6_lookup_node, ip6_lookup);
700 ip6_load_balance (vlib_main_t * vm,
701 vlib_node_runtime_t * node, vlib_frame_t * frame)
703 vlib_combined_counter_main_t *cm = &load_balance_main.lbm_via_counters;
704 u32 n_left_from, n_left_to_next, *from, *to_next;
705 ip_lookup_next_t next;
706 u32 cpu_index = os_get_cpu_number ();
707 ip6_main_t *im = &ip6_main;
709 from = vlib_frame_vector_args (frame);
710 n_left_from = frame->n_vectors;
711 next = node->cached_next_index;
713 if (node->flags & VLIB_NODE_FLAG_TRACE)
714 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
716 while (n_left_from > 0)
718 vlib_get_next_frame (vm, node, next, to_next, n_left_to_next);
721 while (n_left_from >= 4 && n_left_to_next >= 2)
723 ip_lookup_next_t next0, next1;
724 const load_balance_t *lb0, *lb1;
725 vlib_buffer_t *p0, *p1;
726 u32 pi0, lbi0, hc0, pi1, lbi1, hc1;
727 const ip6_header_t *ip0, *ip1;
728 const dpo_id_t *dpo0, *dpo1;
730 /* Prefetch next iteration. */
732 vlib_buffer_t *p2, *p3;
734 p2 = vlib_get_buffer (vm, from[2]);
735 p3 = vlib_get_buffer (vm, from[3]);
737 vlib_prefetch_buffer_header (p2, STORE);
738 vlib_prefetch_buffer_header (p3, STORE);
740 CLIB_PREFETCH (p2->data, sizeof (ip0[0]), STORE);
741 CLIB_PREFETCH (p3->data, sizeof (ip0[0]), STORE);
744 pi0 = to_next[0] = from[0];
745 pi1 = to_next[1] = from[1];
752 p0 = vlib_get_buffer (vm, pi0);
753 p1 = vlib_get_buffer (vm, pi1);
755 ip0 = vlib_buffer_get_current (p0);
756 ip1 = vlib_buffer_get_current (p1);
757 lbi0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
758 lbi1 = vnet_buffer (p1)->ip.adj_index[VLIB_TX];
760 lb0 = load_balance_get (lbi0);
761 lb1 = load_balance_get (lbi1);
764 * this node is for via FIBs we can re-use the hash value from the
765 * to node if present.
766 * We don't want to use the same hash value at each level in the recursion
767 * graph as that would lead to polarisation
771 if (PREDICT_FALSE (lb0->lb_n_buckets > 1))
773 if (PREDICT_TRUE (vnet_buffer (p0)->ip.flow_hash))
775 hc0 = vnet_buffer (p0)->ip.flow_hash =
776 vnet_buffer (p0)->ip.flow_hash >> 1;
780 hc0 = vnet_buffer (p0)->ip.flow_hash =
781 ip6_compute_flow_hash (ip0, lb0->lb_hash_config);
784 if (PREDICT_FALSE (lb1->lb_n_buckets > 1))
786 if (PREDICT_TRUE (vnet_buffer (p1)->ip.flow_hash))
788 hc1 = vnet_buffer (p1)->ip.flow_hash =
789 vnet_buffer (p1)->ip.flow_hash >> 1;
793 hc1 = vnet_buffer (p1)->ip.flow_hash =
794 ip6_compute_flow_hash (ip1, lb1->lb_hash_config);
799 load_balance_get_bucket_i (lb0,
800 hc0 & (lb0->lb_n_buckets_minus_1));
802 load_balance_get_bucket_i (lb1,
803 hc1 & (lb1->lb_n_buckets_minus_1));
805 next0 = dpo0->dpoi_next_node;
806 next1 = dpo1->dpoi_next_node;
808 /* Only process the HBH Option Header if explicitly configured to do so */
810 (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
812 next0 = (dpo_is_adj (dpo0) && im->hbh_enabled) ?
813 (ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next0;
815 /* Only process the HBH Option Header if explicitly configured to do so */
817 (ip1->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
819 next1 = (dpo_is_adj (dpo1) && im->hbh_enabled) ?
820 (ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next1;
823 vnet_buffer (p0)->ip.adj_index[VLIB_TX] = dpo0->dpoi_index;
824 vnet_buffer (p1)->ip.adj_index[VLIB_TX] = dpo1->dpoi_index;
826 vlib_increment_combined_counter
827 (cm, cpu_index, lbi0, 1, vlib_buffer_length_in_chain (vm, p0));
828 vlib_increment_combined_counter
829 (cm, cpu_index, lbi1, 1, vlib_buffer_length_in_chain (vm, p1));
831 vlib_validate_buffer_enqueue_x2 (vm, node, next,
832 to_next, n_left_to_next,
833 pi0, pi1, next0, next1);
836 while (n_left_from > 0 && n_left_to_next > 0)
838 ip_lookup_next_t next0;
839 const load_balance_t *lb0;
842 const ip6_header_t *ip0;
843 const dpo_id_t *dpo0;
852 p0 = vlib_get_buffer (vm, pi0);
854 ip0 = vlib_buffer_get_current (p0);
855 lbi0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
857 lb0 = load_balance_get (lbi0);
860 if (PREDICT_FALSE (lb0->lb_n_buckets > 1))
862 if (PREDICT_TRUE (vnet_buffer (p0)->ip.flow_hash))
864 hc0 = vnet_buffer (p0)->ip.flow_hash =
865 vnet_buffer (p0)->ip.flow_hash >> 1;
869 hc0 = vnet_buffer (p0)->ip.flow_hash =
870 ip6_compute_flow_hash (ip0, lb0->lb_hash_config);
874 load_balance_get_bucket_i (lb0,
875 hc0 & (lb0->lb_n_buckets_minus_1));
877 next0 = dpo0->dpoi_next_node;
878 vnet_buffer (p0)->ip.adj_index[VLIB_TX] = dpo0->dpoi_index;
880 /* Only process the HBH Option Header if explicitly configured to do so */
882 (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
884 next0 = (dpo_is_adj (dpo0) && im->hbh_enabled) ?
885 (ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next0;
888 vlib_increment_combined_counter
889 (cm, cpu_index, lbi0, 1, vlib_buffer_length_in_chain (vm, p0));
891 vlib_validate_buffer_enqueue_x1 (vm, node, next,
892 to_next, n_left_to_next,
896 vlib_put_next_frame (vm, node, next, n_left_to_next);
899 return frame->n_vectors;
903 VLIB_REGISTER_NODE (ip6_load_balance_node) =
905 .function = ip6_load_balance,
906 .name = "ip6-load-balance",
907 .vector_size = sizeof (u32),
908 .sibling_of = "ip6-lookup",
909 .format_trace = format_ip6_lookup_trace,
913 VLIB_NODE_FUNCTION_MULTIARCH (ip6_load_balance_node, ip6_load_balance);
917 /* Adjacency taken. */
922 /* Packet data, possibly *after* rewrite. */
923 u8 packet_data[128 - 1 * sizeof (u32)];
925 ip6_forward_next_trace_t;
928 format_ip6_forward_next_trace (u8 * s, va_list * args)
930 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
931 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
932 ip6_forward_next_trace_t *t = va_arg (*args, ip6_forward_next_trace_t *);
933 uword indent = format_get_indent (s);
935 s = format (s, "%U%U",
936 format_white_space, indent,
937 format_ip6_header, t->packet_data, sizeof (t->packet_data));
942 format_ip6_lookup_trace (u8 * s, va_list * args)
944 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
945 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
946 ip6_forward_next_trace_t *t = va_arg (*args, ip6_forward_next_trace_t *);
947 uword indent = format_get_indent (s);
949 s = format (s, "fib %d dpo-idx %d flow hash: 0x%08x",
950 t->fib_index, t->adj_index, t->flow_hash);
951 s = format (s, "\n%U%U",
952 format_white_space, indent,
953 format_ip6_header, t->packet_data, sizeof (t->packet_data));
959 format_ip6_rewrite_trace (u8 * s, va_list * args)
961 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
962 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
963 ip6_forward_next_trace_t *t = va_arg (*args, ip6_forward_next_trace_t *);
964 vnet_main_t *vnm = vnet_get_main ();
965 uword indent = format_get_indent (s);
967 s = format (s, "tx_sw_if_index %d adj-idx %d : %U flow hash: 0x%08x",
968 t->fib_index, t->adj_index, format_ip_adjacency,
969 t->adj_index, FORMAT_IP_ADJACENCY_NONE, t->flow_hash);
970 s = format (s, "\n%U%U",
971 format_white_space, indent,
972 format_ip_adjacency_packet_data,
973 vnm, t->adj_index, t->packet_data, sizeof (t->packet_data));
977 /* Common trace function for all ip6-forward next nodes. */
979 ip6_forward_next_trace (vlib_main_t * vm,
980 vlib_node_runtime_t * node,
981 vlib_frame_t * frame, vlib_rx_or_tx_t which_adj_index)
984 ip6_main_t *im = &ip6_main;
986 n_left = frame->n_vectors;
987 from = vlib_frame_vector_args (frame);
992 vlib_buffer_t *b0, *b1;
993 ip6_forward_next_trace_t *t0, *t1;
995 /* Prefetch next iteration. */
996 vlib_prefetch_buffer_with_index (vm, from[2], LOAD);
997 vlib_prefetch_buffer_with_index (vm, from[3], LOAD);
1002 b0 = vlib_get_buffer (vm, bi0);
1003 b1 = vlib_get_buffer (vm, bi1);
1005 if (b0->flags & VLIB_BUFFER_IS_TRACED)
1007 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
1008 t0->adj_index = vnet_buffer (b0)->ip.adj_index[which_adj_index];
1009 t0->flow_hash = vnet_buffer (b0)->ip.flow_hash;
1011 (vnet_buffer (b0)->sw_if_index[VLIB_TX] !=
1012 (u32) ~ 0) ? vnet_buffer (b0)->sw_if_index[VLIB_TX] :
1013 vec_elt (im->fib_index_by_sw_if_index,
1014 vnet_buffer (b0)->sw_if_index[VLIB_RX]);
1016 clib_memcpy (t0->packet_data,
1017 vlib_buffer_get_current (b0),
1018 sizeof (t0->packet_data));
1020 if (b1->flags & VLIB_BUFFER_IS_TRACED)
1022 t1 = vlib_add_trace (vm, node, b1, sizeof (t1[0]));
1023 t1->adj_index = vnet_buffer (b1)->ip.adj_index[which_adj_index];
1024 t1->flow_hash = vnet_buffer (b1)->ip.flow_hash;
1026 (vnet_buffer (b1)->sw_if_index[VLIB_TX] !=
1027 (u32) ~ 0) ? vnet_buffer (b1)->sw_if_index[VLIB_TX] :
1028 vec_elt (im->fib_index_by_sw_if_index,
1029 vnet_buffer (b1)->sw_if_index[VLIB_RX]);
1031 clib_memcpy (t1->packet_data,
1032 vlib_buffer_get_current (b1),
1033 sizeof (t1->packet_data));
1043 ip6_forward_next_trace_t *t0;
1047 b0 = vlib_get_buffer (vm, bi0);
1049 if (b0->flags & VLIB_BUFFER_IS_TRACED)
1051 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
1052 t0->adj_index = vnet_buffer (b0)->ip.adj_index[which_adj_index];
1053 t0->flow_hash = vnet_buffer (b0)->ip.flow_hash;
1055 (vnet_buffer (b0)->sw_if_index[VLIB_TX] !=
1056 (u32) ~ 0) ? vnet_buffer (b0)->sw_if_index[VLIB_TX] :
1057 vec_elt (im->fib_index_by_sw_if_index,
1058 vnet_buffer (b0)->sw_if_index[VLIB_RX]);
1060 clib_memcpy (t0->packet_data,
1061 vlib_buffer_get_current (b0),
1062 sizeof (t0->packet_data));
1070 ip6_drop_or_punt (vlib_main_t * vm,
1071 vlib_node_runtime_t * node,
1072 vlib_frame_t * frame, ip6_error_t error_code)
1074 u32 *buffers = vlib_frame_vector_args (frame);
1075 uword n_packets = frame->n_vectors;
1077 vlib_error_drop_buffers (vm, node, buffers,
1081 ip6_input_node.index, error_code);
1083 if (node->flags & VLIB_NODE_FLAG_TRACE)
1084 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
1090 ip6_drop (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
1092 return ip6_drop_or_punt (vm, node, frame, IP6_ERROR_ADJACENCY_DROP);
1096 ip6_punt (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
1098 return ip6_drop_or_punt (vm, node, frame, IP6_ERROR_ADJACENCY_PUNT);
1102 VLIB_REGISTER_NODE (ip6_drop_node, static) =
1104 .function = ip6_drop,
1106 .vector_size = sizeof (u32),
1107 .format_trace = format_ip6_forward_next_trace,
1111 [0] = "error-drop",},
1115 VLIB_NODE_FUNCTION_MULTIARCH (ip6_drop_node, ip6_drop);
1118 VLIB_REGISTER_NODE (ip6_punt_node, static) =
1120 .function = ip6_punt,
1122 .vector_size = sizeof (u32),
1123 .format_trace = format_ip6_forward_next_trace,
1127 [0] = "error-punt",},
1131 VLIB_NODE_FUNCTION_MULTIARCH (ip6_punt_node, ip6_punt);
1133 /* Compute TCP/UDP/ICMP6 checksum in software. */
1135 ip6_tcp_udp_icmp_compute_checksum (vlib_main_t * vm, vlib_buffer_t * p0,
1136 ip6_header_t * ip0, int *bogus_lengthp)
1139 u16 sum16, payload_length_host_byte_order;
1140 u32 i, n_this_buffer, n_bytes_left;
1141 u32 headers_size = sizeof (ip0[0]);
1142 void *data_this_buffer;
1144 ASSERT (bogus_lengthp);
1147 /* Initialize checksum with ip header. */
1148 sum0 = ip0->payload_length + clib_host_to_net_u16 (ip0->protocol);
1149 payload_length_host_byte_order = clib_net_to_host_u16 (ip0->payload_length);
1150 data_this_buffer = (void *) (ip0 + 1);
1152 for (i = 0; i < ARRAY_LEN (ip0->src_address.as_uword); i++)
1154 sum0 = ip_csum_with_carry (sum0,
1155 clib_mem_unaligned (&ip0->
1156 src_address.as_uword[i],
1159 ip_csum_with_carry (sum0,
1160 clib_mem_unaligned (&ip0->dst_address.as_uword[i],
1164 /* some icmp packets may come with a "router alert" hop-by-hop extension header (e.g., mldv2 packets) */
1165 if (PREDICT_FALSE (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
1168 ip6_hop_by_hop_ext_t *ext_hdr =
1169 (ip6_hop_by_hop_ext_t *) data_this_buffer;
1171 /* validate really icmp6 next */
1172 ASSERT (ext_hdr->next_hdr == IP_PROTOCOL_ICMP6);
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 |= (IP_BUFFER_L4_CHECKSUM_COMPUTED
1226 | IP_BUFFER_L4_CHECKSUM_CORRECT);
1230 sum16 = ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip0, &bogus_length);
1232 p0->flags |= (IP_BUFFER_L4_CHECKSUM_COMPUTED
1233 | ((sum16 == 0) << LOG2_IP_BUFFER_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_local (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
1260 ip6_main_t *im = &ip6_main;
1261 ip_lookup_main_t *lm = &im->lookup_main;
1262 ip_local_next_t next_index;
1263 u32 *from, *to_next, n_left_from, n_left_to_next;
1264 vlib_node_runtime_t *error_node =
1265 vlib_node_get_runtime (vm, ip6_input_node.index);
1267 from = vlib_frame_vector_args (frame);
1268 n_left_from = frame->n_vectors;
1269 next_index = node->cached_next_index;
1271 if (node->flags & VLIB_NODE_FLAG_TRACE)
1272 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
1274 while (n_left_from > 0)
1276 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1278 while (n_left_from >= 4 && n_left_to_next >= 2)
1280 vlib_buffer_t *p0, *p1;
1281 ip6_header_t *ip0, *ip1;
1282 udp_header_t *udp0, *udp1;
1283 u32 pi0, ip_len0, udp_len0, flags0, next0;
1284 u32 pi1, ip_len1, udp_len1, flags1, next1;
1285 i32 len_diff0, len_diff1;
1286 u8 error0, type0, good_l4_checksum0;
1287 u8 error1, type1, good_l4_checksum1;
1288 u32 udp_offset0, udp_offset1;
1290 pi0 = to_next[0] = from[0];
1291 pi1 = to_next[1] = from[1];
1295 n_left_to_next -= 2;
1297 p0 = vlib_get_buffer (vm, pi0);
1298 p1 = vlib_get_buffer (vm, pi1);
1300 ip0 = vlib_buffer_get_current (p0);
1301 ip1 = vlib_buffer_get_current (p1);
1303 vnet_buffer (p0)->ip.start_of_ip_header = p0->current_data;
1304 vnet_buffer (p1)->ip.start_of_ip_header = p1->current_data;
1306 type0 = lm->builtin_protocol_by_ip_protocol[ip0->protocol];
1307 type1 = lm->builtin_protocol_by_ip_protocol[ip1->protocol];
1309 next0 = lm->local_next_by_ip_protocol[ip0->protocol];
1310 next1 = lm->local_next_by_ip_protocol[ip1->protocol];
1315 good_l4_checksum0 = (flags0 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0;
1316 good_l4_checksum1 = (flags1 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0;
1320 /* Skip HBH local processing */
1322 (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
1324 ip6_hop_by_hop_ext_t *ext_hdr =
1325 (ip6_hop_by_hop_ext_t *) ip6_next_header (ip0);
1326 next0 = lm->local_next_by_ip_protocol[ext_hdr->next_hdr];
1327 type0 = lm->builtin_protocol_by_ip_protocol[ext_hdr->next_hdr];
1330 (ip1->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
1332 ip6_hop_by_hop_ext_t *ext_hdr =
1333 (ip6_hop_by_hop_ext_t *) ip6_next_header (ip1);
1334 next1 = lm->local_next_by_ip_protocol[ext_hdr->next_hdr];
1335 type1 = lm->builtin_protocol_by_ip_protocol[ext_hdr->next_hdr];
1337 if (PREDICT_TRUE (IP_PROTOCOL_UDP == ip6_locate_header (p0, ip0,
1341 udp0 = (udp_header_t *) ((u8 *) ip0 + udp_offset0);
1342 /* Don't verify UDP checksum for packets with explicit zero checksum. */
1343 good_l4_checksum0 |= type0 == IP_BUILTIN_PROTOCOL_UDP
1344 && udp0->checksum == 0;
1345 /* Verify UDP length. */
1346 ip_len0 = clib_net_to_host_u16 (ip0->payload_length);
1347 udp_len0 = clib_net_to_host_u16 (udp0->length);
1348 len_diff0 = ip_len0 - udp_len0;
1350 if (PREDICT_TRUE (IP_PROTOCOL_UDP == ip6_locate_header (p1, ip1,
1354 udp1 = (udp_header_t *) ((u8 *) ip1 + udp_offset1);
1355 /* Don't verify UDP checksum for packets with explicit zero checksum. */
1356 good_l4_checksum1 |= type1 == IP_BUILTIN_PROTOCOL_UDP
1357 && udp1->checksum == 0;
1358 /* Verify UDP length. */
1359 ip_len1 = clib_net_to_host_u16 (ip1->payload_length);
1360 udp_len1 = clib_net_to_host_u16 (udp1->length);
1361 len_diff1 = ip_len1 - udp_len1;
1364 good_l4_checksum0 |= type0 == IP_BUILTIN_PROTOCOL_UNKNOWN;
1365 good_l4_checksum1 |= type1 == IP_BUILTIN_PROTOCOL_UNKNOWN;
1367 len_diff0 = type0 == IP_BUILTIN_PROTOCOL_UDP ? len_diff0 : 0;
1368 len_diff1 = type1 == IP_BUILTIN_PROTOCOL_UDP ? len_diff1 : 0;
1370 if (PREDICT_FALSE (type0 != IP_BUILTIN_PROTOCOL_UNKNOWN
1371 && !good_l4_checksum0
1372 && !(flags0 & IP_BUFFER_L4_CHECKSUM_COMPUTED)))
1374 flags0 = ip6_tcp_udp_icmp_validate_checksum (vm, p0);
1376 (flags0 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0;
1378 if (PREDICT_FALSE (type1 != IP_BUILTIN_PROTOCOL_UNKNOWN
1379 && !good_l4_checksum1
1380 && !(flags1 & IP_BUFFER_L4_CHECKSUM_COMPUTED)))
1382 flags1 = ip6_tcp_udp_icmp_validate_checksum (vm, p1);
1384 (flags1 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0;
1387 error0 = error1 = IP6_ERROR_UNKNOWN_PROTOCOL;
1389 error0 = len_diff0 < 0 ? IP6_ERROR_UDP_LENGTH : error0;
1390 error1 = len_diff1 < 0 ? IP6_ERROR_UDP_LENGTH : error1;
1392 ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_UDP ==
1393 IP6_ERROR_UDP_CHECKSUM);
1394 ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_ICMP ==
1395 IP6_ERROR_ICMP_CHECKSUM);
1397 (!good_l4_checksum0 ? IP6_ERROR_UDP_CHECKSUM + type0 : error0);
1399 (!good_l4_checksum1 ? IP6_ERROR_UDP_CHECKSUM + type1 : error1);
1401 /* Drop packets from unroutable hosts. */
1402 /* If this is a neighbor solicitation (ICMP), skip source RPF check */
1403 if (error0 == IP6_ERROR_UNKNOWN_PROTOCOL &&
1404 type0 != IP_BUILTIN_PROTOCOL_ICMP &&
1405 !ip6_address_is_link_local_unicast (&ip0->src_address))
1407 error0 = (!ip6_urpf_loose_check (im, p0, ip0)
1408 ? IP6_ERROR_SRC_LOOKUP_MISS : error0);
1410 if (error1 == IP6_ERROR_UNKNOWN_PROTOCOL &&
1411 type1 != IP_BUILTIN_PROTOCOL_ICMP &&
1412 !ip6_address_is_link_local_unicast (&ip1->src_address))
1414 error1 = (!ip6_urpf_loose_check (im, p1, ip1)
1415 ? IP6_ERROR_SRC_LOOKUP_MISS : error1);
1419 error0 != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next0;
1421 error1 != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next1;
1423 p0->error = error_node->errors[error0];
1424 p1->error = error_node->errors[error1];
1426 vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
1427 to_next, n_left_to_next,
1428 pi0, pi1, next0, next1);
1431 while (n_left_from > 0 && n_left_to_next > 0)
1436 u32 pi0, ip_len0, udp_len0, flags0, next0;
1438 u8 error0, type0, good_l4_checksum0;
1441 pi0 = to_next[0] = from[0];
1445 n_left_to_next -= 1;
1447 p0 = vlib_get_buffer (vm, pi0);
1449 ip0 = vlib_buffer_get_current (p0);
1451 vnet_buffer (p0)->ip.start_of_ip_header = p0->current_data;
1453 type0 = lm->builtin_protocol_by_ip_protocol[ip0->protocol];
1454 next0 = lm->local_next_by_ip_protocol[ip0->protocol];
1458 good_l4_checksum0 = (flags0 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0;
1461 /* Skip HBH local processing */
1463 (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
1465 ip6_hop_by_hop_ext_t *ext_hdr =
1466 (ip6_hop_by_hop_ext_t *) ip6_next_header (ip0);
1467 next0 = lm->local_next_by_ip_protocol[ext_hdr->next_hdr];
1468 type0 = lm->builtin_protocol_by_ip_protocol[ext_hdr->next_hdr];
1470 if (PREDICT_TRUE (IP_PROTOCOL_UDP == ip6_locate_header (p0, ip0,
1474 udp0 = (udp_header_t *) ((u8 *) ip0 + udp_offset0);
1475 /* Don't verify UDP checksum for packets with explicit zero checksum. */
1476 good_l4_checksum0 |= type0 == IP_BUILTIN_PROTOCOL_UDP
1477 && udp0->checksum == 0;
1478 /* Verify UDP length. */
1479 ip_len0 = clib_net_to_host_u16 (ip0->payload_length);
1480 udp_len0 = clib_net_to_host_u16 (udp0->length);
1481 len_diff0 = ip_len0 - udp_len0;
1484 good_l4_checksum0 |= type0 == IP_BUILTIN_PROTOCOL_UNKNOWN;
1485 len_diff0 = type0 == IP_BUILTIN_PROTOCOL_UDP ? len_diff0 : 0;
1487 if (PREDICT_FALSE (type0 != IP_BUILTIN_PROTOCOL_UNKNOWN
1488 && !good_l4_checksum0
1489 && !(flags0 & IP_BUFFER_L4_CHECKSUM_COMPUTED)))
1491 flags0 = ip6_tcp_udp_icmp_validate_checksum (vm, p0);
1493 (flags0 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0;
1496 error0 = IP6_ERROR_UNKNOWN_PROTOCOL;
1498 error0 = len_diff0 < 0 ? IP6_ERROR_UDP_LENGTH : error0;
1500 ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_UDP ==
1501 IP6_ERROR_UDP_CHECKSUM);
1502 ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_ICMP ==
1503 IP6_ERROR_ICMP_CHECKSUM);
1505 (!good_l4_checksum0 ? IP6_ERROR_UDP_CHECKSUM + type0 : error0);
1507 /* If this is a neighbor solicitation (ICMP), skip source RPF check */
1508 if (error0 == IP6_ERROR_UNKNOWN_PROTOCOL &&
1509 type0 != IP_BUILTIN_PROTOCOL_ICMP &&
1510 !ip6_address_is_link_local_unicast (&ip0->src_address))
1512 error0 = (!ip6_urpf_loose_check (im, p0, ip0)
1513 ? IP6_ERROR_SRC_LOOKUP_MISS : error0);
1517 error0 != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next0;
1519 p0->error = error_node->errors[error0];
1521 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1522 to_next, n_left_to_next,
1526 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1529 return frame->n_vectors;
1533 VLIB_REGISTER_NODE (ip6_local_node, static) =
1535 .function = ip6_local,
1536 .name = "ip6-local",
1537 .vector_size = sizeof (u32),
1538 .format_trace = format_ip6_forward_next_trace,
1539 .n_next_nodes = IP_LOCAL_N_NEXT,
1542 [IP_LOCAL_NEXT_DROP] = "error-drop",
1543 [IP_LOCAL_NEXT_PUNT] = "error-punt",
1544 [IP_LOCAL_NEXT_UDP_LOOKUP] = "ip6-udp-lookup",
1545 [IP_LOCAL_NEXT_ICMP] = "ip6-icmp-input",
1550 VLIB_NODE_FUNCTION_MULTIARCH (ip6_local_node, ip6_local);
1553 ip6_register_protocol (u32 protocol, u32 node_index)
1555 vlib_main_t *vm = vlib_get_main ();
1556 ip6_main_t *im = &ip6_main;
1557 ip_lookup_main_t *lm = &im->lookup_main;
1559 ASSERT (protocol < ARRAY_LEN (lm->local_next_by_ip_protocol));
1560 lm->local_next_by_ip_protocol[protocol] =
1561 vlib_node_add_next (vm, ip6_local_node.index, node_index);
1566 IP6_DISCOVER_NEIGHBOR_NEXT_DROP,
1567 IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX,
1568 IP6_DISCOVER_NEIGHBOR_N_NEXT,
1569 } ip6_discover_neighbor_next_t;
1573 IP6_DISCOVER_NEIGHBOR_ERROR_DROP,
1574 IP6_DISCOVER_NEIGHBOR_ERROR_REQUEST_SENT,
1575 IP6_DISCOVER_NEIGHBOR_ERROR_NO_SOURCE_ADDRESS,
1576 } ip6_discover_neighbor_error_t;
1579 ip6_discover_neighbor_inline (vlib_main_t * vm,
1580 vlib_node_runtime_t * node,
1581 vlib_frame_t * frame, int is_glean)
1583 vnet_main_t *vnm = vnet_get_main ();
1584 ip6_main_t *im = &ip6_main;
1585 ip_lookup_main_t *lm = &im->lookup_main;
1586 u32 *from, *to_next_drop;
1587 uword n_left_from, n_left_to_next_drop;
1588 static f64 time_last_seed_change = -1e100;
1589 static u32 hash_seeds[3];
1590 static uword hash_bitmap[256 / BITS (uword)];
1594 if (node->flags & VLIB_NODE_FLAG_TRACE)
1595 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
1597 time_now = vlib_time_now (vm);
1598 if (time_now - time_last_seed_change > 1e-3)
1601 u32 *r = clib_random_buffer_get_data (&vm->random_buffer,
1602 sizeof (hash_seeds));
1603 for (i = 0; i < ARRAY_LEN (hash_seeds); i++)
1604 hash_seeds[i] = r[i];
1606 /* Mark all hash keys as been not-seen before. */
1607 for (i = 0; i < ARRAY_LEN (hash_bitmap); i++)
1610 time_last_seed_change = time_now;
1613 from = vlib_frame_vector_args (frame);
1614 n_left_from = frame->n_vectors;
1616 while (n_left_from > 0)
1618 vlib_get_next_frame (vm, node, IP6_DISCOVER_NEIGHBOR_NEXT_DROP,
1619 to_next_drop, n_left_to_next_drop);
1621 while (n_left_from > 0 && n_left_to_next_drop > 0)
1625 u32 pi0, adj_index0, a0, b0, c0, m0, sw_if_index0, drop0;
1627 ip_adjacency_t *adj0;
1628 vnet_hw_interface_t *hw_if0;
1633 p0 = vlib_get_buffer (vm, pi0);
1635 adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
1637 ip0 = vlib_buffer_get_current (p0);
1639 adj0 = ip_get_adjacency (lm, adj_index0);
1643 ip0->dst_address.as_u64[0] =
1644 adj0->sub_type.nbr.next_hop.ip6.as_u64[0];
1645 ip0->dst_address.as_u64[1] =
1646 adj0->sub_type.nbr.next_hop.ip6.as_u64[1];
1653 sw_if_index0 = adj0->rewrite_header.sw_if_index;
1654 vnet_buffer (p0)->sw_if_index[VLIB_TX] = sw_if_index0;
1657 b0 ^= ip0->dst_address.as_u32[0];
1658 c0 ^= ip0->dst_address.as_u32[1];
1660 hash_v3_mix32 (a0, b0, c0);
1662 b0 ^= ip0->dst_address.as_u32[2];
1663 c0 ^= ip0->dst_address.as_u32[3];
1665 hash_v3_finalize32 (a0, b0, c0);
1667 c0 &= BITS (hash_bitmap) - 1;
1668 c0 = c0 / BITS (uword);
1669 m0 = (uword) 1 << (c0 % BITS (uword));
1671 bm0 = hash_bitmap[c0];
1672 drop0 = (bm0 & m0) != 0;
1674 /* Mark it as seen. */
1675 hash_bitmap[c0] = bm0 | m0;
1679 to_next_drop[0] = pi0;
1681 n_left_to_next_drop -= 1;
1683 hw_if0 = vnet_get_sup_hw_interface (vnm, sw_if_index0);
1685 /* If the interface is link-down, drop the pkt */
1686 if (!(hw_if0->flags & VNET_HW_INTERFACE_FLAG_LINK_UP))
1690 node->errors[drop0 ? IP6_DISCOVER_NEIGHBOR_ERROR_DROP
1691 : IP6_DISCOVER_NEIGHBOR_ERROR_REQUEST_SENT];
1696 * the adj has been updated to a rewrite but the node the DPO that got
1697 * us here hasn't - yet. no big deal. we'll drop while we wait.
1699 if (IP_LOOKUP_NEXT_REWRITE == adj0->lookup_next_index)
1704 icmp6_neighbor_solicitation_header_t *h0;
1707 h0 = vlib_packet_template_get_packet
1708 (vm, &im->discover_neighbor_packet_template, &bi0);
1711 * Build ethernet header.
1712 * Choose source address based on destination lookup
1715 if (ip6_src_address_for_packet (lm,
1717 &h0->ip.src_address))
1719 /* There is no address on the interface */
1721 node->errors[IP6_DISCOVER_NEIGHBOR_ERROR_NO_SOURCE_ADDRESS];
1722 vlib_buffer_free (vm, &bi0, 1);
1727 * Destination address is a solicited node multicast address.
1728 * We need to fill in
1729 * the low 24 bits with low 24 bits of target's address.
1731 h0->ip.dst_address.as_u8[13] = ip0->dst_address.as_u8[13];
1732 h0->ip.dst_address.as_u8[14] = ip0->dst_address.as_u8[14];
1733 h0->ip.dst_address.as_u8[15] = ip0->dst_address.as_u8[15];
1735 h0->neighbor.target_address = ip0->dst_address;
1737 clib_memcpy (h0->link_layer_option.ethernet_address,
1738 hw_if0->hw_address, vec_len (hw_if0->hw_address));
1740 /* $$$$ appears we need this; why is the checksum non-zero? */
1741 h0->neighbor.icmp.checksum = 0;
1742 h0->neighbor.icmp.checksum =
1743 ip6_tcp_udp_icmp_compute_checksum (vm, 0, &h0->ip,
1746 ASSERT (bogus_length == 0);
1748 vlib_buffer_copy_trace_flag (vm, p0, bi0);
1749 b0 = vlib_get_buffer (vm, bi0);
1750 vnet_buffer (b0)->sw_if_index[VLIB_TX]
1751 = vnet_buffer (p0)->sw_if_index[VLIB_TX];
1753 /* Add rewrite/encap string. */
1754 vnet_rewrite_one_header (adj0[0], h0, sizeof (ethernet_header_t));
1755 vlib_buffer_advance (b0, -adj0->rewrite_header.data_bytes);
1757 next0 = IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX;
1759 vlib_set_next_frame_buffer (vm, node, next0, bi0);
1763 vlib_put_next_frame (vm, node, IP6_DISCOVER_NEIGHBOR_NEXT_DROP,
1764 n_left_to_next_drop);
1767 return frame->n_vectors;
1771 ip6_discover_neighbor (vlib_main_t * vm,
1772 vlib_node_runtime_t * node, vlib_frame_t * frame)
1774 return (ip6_discover_neighbor_inline (vm, node, frame, 0));
1778 ip6_glean (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
1780 return (ip6_discover_neighbor_inline (vm, node, frame, 1));
1783 static char *ip6_discover_neighbor_error_strings[] = {
1784 [IP6_DISCOVER_NEIGHBOR_ERROR_DROP] = "address overflow drops",
1785 [IP6_DISCOVER_NEIGHBOR_ERROR_REQUEST_SENT] = "neighbor solicitations sent",
1786 [IP6_DISCOVER_NEIGHBOR_ERROR_NO_SOURCE_ADDRESS]
1787 = "no source address for ND solicitation",
1791 VLIB_REGISTER_NODE (ip6_discover_neighbor_node) =
1793 .function = ip6_discover_neighbor,
1794 .name = "ip6-discover-neighbor",
1795 .vector_size = sizeof (u32),
1796 .format_trace = format_ip6_forward_next_trace,
1797 .n_errors = ARRAY_LEN (ip6_discover_neighbor_error_strings),
1798 .error_strings = ip6_discover_neighbor_error_strings,
1799 .n_next_nodes = IP6_DISCOVER_NEIGHBOR_N_NEXT,
1802 [IP6_DISCOVER_NEIGHBOR_NEXT_DROP] = "error-drop",
1803 [IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX] = "interface-output",
1809 VLIB_REGISTER_NODE (ip6_glean_node) =
1811 .function = ip6_glean,
1812 .name = "ip6-glean",
1813 .vector_size = sizeof (u32),
1814 .format_trace = format_ip6_forward_next_trace,
1815 .n_errors = ARRAY_LEN (ip6_discover_neighbor_error_strings),
1816 .error_strings = ip6_discover_neighbor_error_strings,
1817 .n_next_nodes = IP6_DISCOVER_NEIGHBOR_N_NEXT,
1820 [IP6_DISCOVER_NEIGHBOR_NEXT_DROP] = "error-drop",
1821 [IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX] = "interface-output",
1827 ip6_probe_neighbor (vlib_main_t * vm, ip6_address_t * dst, u32 sw_if_index)
1829 vnet_main_t *vnm = vnet_get_main ();
1830 ip6_main_t *im = &ip6_main;
1831 icmp6_neighbor_solicitation_header_t *h;
1833 ip_interface_address_t *ia;
1834 ip_adjacency_t *adj;
1835 vnet_hw_interface_t *hi;
1836 vnet_sw_interface_t *si;
1841 si = vnet_get_sw_interface (vnm, sw_if_index);
1843 if (!(si->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP))
1845 return clib_error_return (0, "%U: interface %U down",
1846 format_ip6_address, dst,
1847 format_vnet_sw_if_index_name, vnm,
1852 ip6_interface_address_matching_destination (im, dst, sw_if_index, &ia);
1855 vnm->api_errno = VNET_API_ERROR_NO_MATCHING_INTERFACE;
1856 return clib_error_return
1857 (0, "no matching interface address for destination %U (interface %U)",
1858 format_ip6_address, dst,
1859 format_vnet_sw_if_index_name, vnm, sw_if_index);
1863 vlib_packet_template_get_packet (vm,
1864 &im->discover_neighbor_packet_template,
1867 hi = vnet_get_sup_hw_interface (vnm, sw_if_index);
1869 /* Destination address is a solicited node multicast address. We need to fill in
1870 the low 24 bits with low 24 bits of target's address. */
1871 h->ip.dst_address.as_u8[13] = dst->as_u8[13];
1872 h->ip.dst_address.as_u8[14] = dst->as_u8[14];
1873 h->ip.dst_address.as_u8[15] = dst->as_u8[15];
1875 h->ip.src_address = src[0];
1876 h->neighbor.target_address = dst[0];
1878 clib_memcpy (h->link_layer_option.ethernet_address, hi->hw_address,
1879 vec_len (hi->hw_address));
1881 h->neighbor.icmp.checksum =
1882 ip6_tcp_udp_icmp_compute_checksum (vm, 0, &h->ip, &bogus_length);
1883 ASSERT (bogus_length == 0);
1885 b = vlib_get_buffer (vm, bi);
1886 vnet_buffer (b)->sw_if_index[VLIB_RX] =
1887 vnet_buffer (b)->sw_if_index[VLIB_TX] = sw_if_index;
1889 /* Add encapsulation string for software interface (e.g. ethernet header). */
1890 adj = ip_get_adjacency (&im->lookup_main, ia->neighbor_probe_adj_index);
1891 vnet_rewrite_one_header (adj[0], h, sizeof (ethernet_header_t));
1892 vlib_buffer_advance (b, -adj->rewrite_header.data_bytes);
1895 vlib_frame_t *f = vlib_get_frame_to_node (vm, hi->output_node_index);
1896 u32 *to_next = vlib_frame_vector_args (f);
1899 vlib_put_frame_to_node (vm, hi->output_node_index, f);
1902 return /* no error */ 0;
1907 IP6_REWRITE_NEXT_DROP,
1908 IP6_REWRITE_NEXT_ICMP_ERROR,
1909 } ip6_rewrite_next_t;
1912 ip6_rewrite_inline (vlib_main_t * vm,
1913 vlib_node_runtime_t * node,
1914 vlib_frame_t * frame, int is_midchain, int is_mcast)
1916 ip_lookup_main_t *lm = &ip6_main.lookup_main;
1917 u32 *from = vlib_frame_vector_args (frame);
1918 u32 n_left_from, n_left_to_next, *to_next, next_index;
1919 vlib_node_runtime_t *error_node =
1920 vlib_node_get_runtime (vm, ip6_input_node.index);
1922 n_left_from = frame->n_vectors;
1923 next_index = node->cached_next_index;
1924 u32 cpu_index = os_get_cpu_number ();
1926 while (n_left_from > 0)
1928 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1930 while (n_left_from >= 4 && n_left_to_next >= 2)
1932 ip_adjacency_t *adj0, *adj1;
1933 vlib_buffer_t *p0, *p1;
1934 ip6_header_t *ip0, *ip1;
1935 u32 pi0, rw_len0, next0, error0, adj_index0;
1936 u32 pi1, rw_len1, next1, error1, adj_index1;
1937 u32 tx_sw_if_index0, tx_sw_if_index1;
1939 /* Prefetch next iteration. */
1941 vlib_buffer_t *p2, *p3;
1943 p2 = vlib_get_buffer (vm, from[2]);
1944 p3 = vlib_get_buffer (vm, from[3]);
1946 vlib_prefetch_buffer_header (p2, LOAD);
1947 vlib_prefetch_buffer_header (p3, LOAD);
1949 CLIB_PREFETCH (p2->pre_data, 32, STORE);
1950 CLIB_PREFETCH (p3->pre_data, 32, STORE);
1952 CLIB_PREFETCH (p2->data, sizeof (ip0[0]), STORE);
1953 CLIB_PREFETCH (p3->data, sizeof (ip0[0]), STORE);
1956 pi0 = to_next[0] = from[0];
1957 pi1 = to_next[1] = from[1];
1962 n_left_to_next -= 2;
1964 p0 = vlib_get_buffer (vm, pi0);
1965 p1 = vlib_get_buffer (vm, pi1);
1967 adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
1968 adj_index1 = vnet_buffer (p1)->ip.adj_index[VLIB_TX];
1970 /* We should never rewrite a pkt using the MISS adjacency */
1971 ASSERT (adj_index0 && adj_index1);
1973 ip0 = vlib_buffer_get_current (p0);
1974 ip1 = vlib_buffer_get_current (p1);
1976 error0 = error1 = IP6_ERROR_NONE;
1977 next0 = next1 = IP6_REWRITE_NEXT_DROP;
1979 if (PREDICT_TRUE (!(p0->flags & VNET_BUFFER_LOCALLY_ORIGINATED)))
1981 i32 hop_limit0 = ip0->hop_limit;
1983 /* Input node should have reject packets with hop limit 0. */
1984 ASSERT (ip0->hop_limit > 0);
1988 ip0->hop_limit = hop_limit0;
1991 * If the hop count drops below 1 when forwarding, generate
1994 if (PREDICT_FALSE (hop_limit0 <= 0))
1996 error0 = IP6_ERROR_TIME_EXPIRED;
1997 next0 = IP6_REWRITE_NEXT_ICMP_ERROR;
1998 vnet_buffer (p0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
1999 icmp6_error_set_vnet_buffer (p0, ICMP6_time_exceeded,
2000 ICMP6_time_exceeded_ttl_exceeded_in_transit,
2006 p0->flags &= ~VNET_BUFFER_LOCALLY_ORIGINATED;
2008 if (PREDICT_TRUE (!(p1->flags & VNET_BUFFER_LOCALLY_ORIGINATED)))
2010 i32 hop_limit1 = ip1->hop_limit;
2012 /* Input node should have reject packets with hop limit 0. */
2013 ASSERT (ip1->hop_limit > 0);
2017 ip1->hop_limit = hop_limit1;
2020 * If the hop count drops below 1 when forwarding, generate
2023 if (PREDICT_FALSE (hop_limit1 <= 0))
2025 error1 = IP6_ERROR_TIME_EXPIRED;
2026 next1 = IP6_REWRITE_NEXT_ICMP_ERROR;
2027 vnet_buffer (p1)->sw_if_index[VLIB_TX] = (u32) ~ 0;
2028 icmp6_error_set_vnet_buffer (p1, ICMP6_time_exceeded,
2029 ICMP6_time_exceeded_ttl_exceeded_in_transit,
2035 p1->flags &= ~VNET_BUFFER_LOCALLY_ORIGINATED;
2037 adj0 = ip_get_adjacency (lm, adj_index0);
2038 adj1 = ip_get_adjacency (lm, adj_index1);
2040 rw_len0 = adj0[0].rewrite_header.data_bytes;
2041 rw_len1 = adj1[0].rewrite_header.data_bytes;
2042 vnet_buffer (p0)->ip.save_rewrite_length = rw_len0;
2043 vnet_buffer (p1)->ip.save_rewrite_length = rw_len1;
2045 vlib_increment_combined_counter
2046 (&adjacency_counters,
2048 adj_index0, 1, vlib_buffer_length_in_chain (vm, p0) + rw_len0);
2049 vlib_increment_combined_counter
2050 (&adjacency_counters,
2051 cpu_index, adj_index1,
2052 1, vlib_buffer_length_in_chain (vm, p1) + rw_len1);
2054 /* Check MTU of outgoing interface. */
2056 (vlib_buffer_length_in_chain (vm, p0) >
2058 rewrite_header.max_l3_packet_bytes ? IP6_ERROR_MTU_EXCEEDED :
2061 (vlib_buffer_length_in_chain (vm, p1) >
2063 rewrite_header.max_l3_packet_bytes ? IP6_ERROR_MTU_EXCEEDED :
2066 /* Don't adjust the buffer for hop count issue; icmp-error node
2067 * wants to see the IP headerr */
2068 if (PREDICT_TRUE (error0 == IP6_ERROR_NONE))
2070 p0->current_data -= rw_len0;
2071 p0->current_length += rw_len0;
2073 tx_sw_if_index0 = adj0[0].rewrite_header.sw_if_index;
2074 vnet_buffer (p0)->sw_if_index[VLIB_TX] = tx_sw_if_index0;
2075 next0 = adj0[0].rewrite_header.next_index;
2077 vnet_feature_arc_start (lm->output_feature_arc_index,
2078 tx_sw_if_index0, &next0, p0);
2080 if (PREDICT_TRUE (error1 == IP6_ERROR_NONE))
2082 p1->current_data -= rw_len1;
2083 p1->current_length += rw_len1;
2085 tx_sw_if_index1 = adj1[0].rewrite_header.sw_if_index;
2086 vnet_buffer (p1)->sw_if_index[VLIB_TX] = tx_sw_if_index1;
2087 next1 = adj1[0].rewrite_header.next_index;
2089 vnet_feature_arc_start (lm->output_feature_arc_index,
2090 tx_sw_if_index1, &next1, p1);
2093 /* Guess we are only writing on simple Ethernet header. */
2094 vnet_rewrite_two_headers (adj0[0], adj1[0],
2095 ip0, ip1, sizeof (ethernet_header_t));
2099 adj0->sub_type.midchain.fixup_func (vm, adj0, p0);
2100 adj1->sub_type.midchain.fixup_func (vm, adj1, p1);
2105 * copy bytes from the IP address into the MAC rewrite
2107 vnet_fixup_one_header (adj0[0], &ip0->dst_address, ip0, 0);
2108 vnet_fixup_one_header (adj1[0], &ip1->dst_address, ip1, 0);
2111 vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
2112 to_next, n_left_to_next,
2113 pi0, pi1, next0, next1);
2116 while (n_left_from > 0 && n_left_to_next > 0)
2118 ip_adjacency_t *adj0;
2122 u32 adj_index0, next0, error0;
2123 u32 tx_sw_if_index0;
2125 pi0 = to_next[0] = from[0];
2127 p0 = vlib_get_buffer (vm, pi0);
2129 adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
2131 /* We should never rewrite a pkt using the MISS adjacency */
2132 ASSERT (adj_index0);
2134 adj0 = ip_get_adjacency (lm, adj_index0);
2136 ip0 = vlib_buffer_get_current (p0);
2138 error0 = IP6_ERROR_NONE;
2139 next0 = IP6_REWRITE_NEXT_DROP;
2141 /* Check hop limit */
2142 if (PREDICT_TRUE (!(p0->flags & VNET_BUFFER_LOCALLY_ORIGINATED)))
2144 i32 hop_limit0 = ip0->hop_limit;
2146 ASSERT (ip0->hop_limit > 0);
2150 ip0->hop_limit = hop_limit0;
2152 if (PREDICT_FALSE (hop_limit0 <= 0))
2155 * If the hop count drops below 1 when forwarding, generate
2158 error0 = IP6_ERROR_TIME_EXPIRED;
2159 next0 = IP6_REWRITE_NEXT_ICMP_ERROR;
2160 vnet_buffer (p0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
2161 icmp6_error_set_vnet_buffer (p0, ICMP6_time_exceeded,
2162 ICMP6_time_exceeded_ttl_exceeded_in_transit,
2168 p0->flags &= ~VNET_BUFFER_LOCALLY_ORIGINATED;
2171 /* Guess we are only writing on simple Ethernet header. */
2172 vnet_rewrite_one_header (adj0[0], ip0, sizeof (ethernet_header_t));
2174 /* Update packet buffer attributes/set output interface. */
2175 rw_len0 = adj0[0].rewrite_header.data_bytes;
2176 vnet_buffer (p0)->ip.save_rewrite_length = rw_len0;
2178 vlib_increment_combined_counter
2179 (&adjacency_counters,
2181 adj_index0, 1, vlib_buffer_length_in_chain (vm, p0) + rw_len0);
2183 /* Check MTU of outgoing interface. */
2185 (vlib_buffer_length_in_chain (vm, p0) >
2187 rewrite_header.max_l3_packet_bytes ? IP6_ERROR_MTU_EXCEEDED :
2190 /* Don't adjust the buffer for hop count issue; icmp-error node
2191 * wants to see the IP headerr */
2192 if (PREDICT_TRUE (error0 == IP6_ERROR_NONE))
2194 p0->current_data -= rw_len0;
2195 p0->current_length += rw_len0;
2197 tx_sw_if_index0 = adj0[0].rewrite_header.sw_if_index;
2199 vnet_buffer (p0)->sw_if_index[VLIB_TX] = tx_sw_if_index0;
2200 next0 = adj0[0].rewrite_header.next_index;
2202 vnet_feature_arc_start (lm->output_feature_arc_index,
2203 tx_sw_if_index0, &next0, p0);
2208 adj0->sub_type.midchain.fixup_func (vm, adj0, p0);
2212 vnet_fixup_one_header (adj0[0], &ip0->dst_address, ip0, 0);
2215 p0->error = error_node->errors[error0];
2220 n_left_to_next -= 1;
2222 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
2223 to_next, n_left_to_next,
2227 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2230 /* Need to do trace after rewrites to pick up new packet data. */
2231 if (node->flags & VLIB_NODE_FLAG_TRACE)
2232 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
2234 return frame->n_vectors;
2238 ip6_rewrite (vlib_main_t * vm,
2239 vlib_node_runtime_t * node, vlib_frame_t * frame)
2241 return ip6_rewrite_inline (vm, node, frame, 0, 0);
2245 ip6_rewrite_mcast (vlib_main_t * vm,
2246 vlib_node_runtime_t * node, vlib_frame_t * frame)
2248 return ip6_rewrite_inline (vm, node, frame, 0, 1);
2252 ip6_midchain (vlib_main_t * vm,
2253 vlib_node_runtime_t * node, vlib_frame_t * frame)
2255 return ip6_rewrite_inline (vm, node, frame, 1, 0);
2259 VLIB_REGISTER_NODE (ip6_midchain_node) =
2261 .function = ip6_midchain,
2262 .name = "ip6-midchain",
2263 .vector_size = sizeof (u32),
2264 .format_trace = format_ip6_forward_next_trace,
2265 .sibling_of = "ip6-rewrite",
2269 VLIB_NODE_FUNCTION_MULTIARCH (ip6_midchain_node, ip6_midchain);
2272 VLIB_REGISTER_NODE (ip6_rewrite_node) =
2274 .function = ip6_rewrite,
2275 .name = "ip6-rewrite",
2276 .vector_size = sizeof (u32),
2277 .format_trace = format_ip6_rewrite_trace,
2281 [IP6_REWRITE_NEXT_DROP] = "error-drop",
2282 [IP6_REWRITE_NEXT_ICMP_ERROR] = "ip6-icmp-error",
2287 VLIB_NODE_FUNCTION_MULTIARCH (ip6_rewrite_node, ip6_rewrite);
2290 VLIB_REGISTER_NODE (ip6_rewrite_mcast_node) =
2292 .function = ip6_rewrite_mcast,
2293 .name = "ip6-rewrite-mcast",
2294 .vector_size = sizeof (u32),
2295 .format_trace = format_ip6_rewrite_trace,
2296 .sibling_of = "ip6-rewrite",
2300 VLIB_NODE_FUNCTION_MULTIARCH (ip6_rewrite_mcast_node, ip6_rewrite_mcast);
2303 * Hop-by-Hop handling
2305 ip6_hop_by_hop_main_t ip6_hop_by_hop_main;
2307 #define foreach_ip6_hop_by_hop_error \
2308 _(PROCESSED, "pkts with ip6 hop-by-hop options") \
2309 _(FORMAT, "incorrectly formatted hop-by-hop options") \
2310 _(UNKNOWN_OPTION, "unknown ip6 hop-by-hop options")
2315 #define _(sym,str) IP6_HOP_BY_HOP_ERROR_##sym,
2316 foreach_ip6_hop_by_hop_error
2318 IP6_HOP_BY_HOP_N_ERROR,
2319 } ip6_hop_by_hop_error_t;
2323 * Primary h-b-h handler trace support
2324 * We work pretty hard on the problem for obvious reasons
2330 u8 option_data[256];
2331 } ip6_hop_by_hop_trace_t;
2333 vlib_node_registration_t ip6_hop_by_hop_node;
2335 static char *ip6_hop_by_hop_error_strings[] = {
2336 #define _(sym,string) string,
2337 foreach_ip6_hop_by_hop_error
2342 format_ip6_hop_by_hop_ext_hdr (u8 * s, va_list * args)
2344 ip6_hop_by_hop_header_t *hbh0 = va_arg (*args, ip6_hop_by_hop_header_t *);
2345 int total_len = va_arg (*args, int);
2346 ip6_hop_by_hop_option_t *opt0, *limit0;
2347 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2350 s = format (s, "IP6_HOP_BY_HOP: next protocol %d len %d total %d",
2351 hbh0->protocol, (hbh0->length + 1) << 3, total_len);
2353 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2354 limit0 = (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 + total_len);
2356 while (opt0 < limit0)
2361 case 0: /* Pad, just stop */
2362 opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0 + 1);
2366 if (hm->trace[type0])
2368 s = (*hm->trace[type0]) (s, opt0);
2373 format (s, "\n unrecognized option %d length %d", type0,
2377 (ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length +
2378 sizeof (ip6_hop_by_hop_option_t));
2386 format_ip6_hop_by_hop_trace (u8 * s, va_list * args)
2388 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
2389 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
2390 ip6_hop_by_hop_trace_t *t = va_arg (*args, ip6_hop_by_hop_trace_t *);
2391 ip6_hop_by_hop_header_t *hbh0;
2392 ip6_hop_by_hop_option_t *opt0, *limit0;
2393 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2397 hbh0 = (ip6_hop_by_hop_header_t *) t->option_data;
2399 s = format (s, "IP6_HOP_BY_HOP: next index %d len %d traced %d",
2400 t->next_index, (hbh0->length + 1) << 3, t->trace_len);
2402 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2403 limit0 = (ip6_hop_by_hop_option_t *) ((u8 *) hbh0) + t->trace_len;
2405 while (opt0 < limit0)
2410 case 0: /* Pad, just stop */
2411 opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0) + 1;
2415 if (hm->trace[type0])
2417 s = (*hm->trace[type0]) (s, opt0);
2422 format (s, "\n unrecognized option %d length %d", type0,
2426 (ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length +
2427 sizeof (ip6_hop_by_hop_option_t));
2435 ip6_scan_hbh_options (vlib_buffer_t * b0,
2437 ip6_hop_by_hop_header_t * hbh0,
2438 ip6_hop_by_hop_option_t * opt0,
2439 ip6_hop_by_hop_option_t * limit0, u32 * next0)
2441 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2445 while (opt0 < limit0)
2451 opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0) + 1;
2456 if (hm->options[type0])
2458 if ((*hm->options[type0]) (b0, ip0, opt0) < 0)
2460 error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2466 /* Unrecognized mandatory option, check the two high order bits */
2467 switch (opt0->type & HBH_OPTION_TYPE_HIGH_ORDER_BITS)
2469 case HBH_OPTION_TYPE_SKIP_UNKNOWN:
2471 case HBH_OPTION_TYPE_DISCARD_UNKNOWN:
2472 error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2473 *next0 = IP_LOOKUP_NEXT_DROP;
2475 case HBH_OPTION_TYPE_DISCARD_UNKNOWN_ICMP:
2476 error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2477 *next0 = IP_LOOKUP_NEXT_ICMP_ERROR;
2478 icmp6_error_set_vnet_buffer (b0, ICMP6_parameter_problem,
2479 ICMP6_parameter_problem_unrecognized_option,
2480 (u8 *) opt0 - (u8 *) ip0);
2482 case HBH_OPTION_TYPE_DISCARD_UNKNOWN_ICMP_NOT_MCAST:
2483 error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2484 if (!ip6_address_is_multicast (&ip0->dst_address))
2486 *next0 = IP_LOOKUP_NEXT_ICMP_ERROR;
2487 icmp6_error_set_vnet_buffer (b0,
2488 ICMP6_parameter_problem,
2489 ICMP6_parameter_problem_unrecognized_option,
2490 (u8 *) opt0 - (u8 *) ip0);
2494 *next0 = IP_LOOKUP_NEXT_DROP;
2502 (ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length +
2503 sizeof (ip6_hop_by_hop_option_t));
2509 * Process the Hop-by-Hop Options header
2512 ip6_hop_by_hop (vlib_main_t * vm,
2513 vlib_node_runtime_t * node, vlib_frame_t * frame)
2515 vlib_node_runtime_t *error_node =
2516 vlib_node_get_runtime (vm, ip6_hop_by_hop_node.index);
2517 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2518 u32 n_left_from, *from, *to_next;
2519 ip_lookup_next_t next_index;
2520 ip6_main_t *im = &ip6_main;
2521 ip_lookup_main_t *lm = &im->lookup_main;
2523 from = vlib_frame_vector_args (frame);
2524 n_left_from = frame->n_vectors;
2525 next_index = node->cached_next_index;
2527 while (n_left_from > 0)
2531 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
2533 while (n_left_from >= 4 && n_left_to_next >= 2)
2536 vlib_buffer_t *b0, *b1;
2538 ip6_header_t *ip0, *ip1;
2539 ip6_hop_by_hop_header_t *hbh0, *hbh1;
2540 ip6_hop_by_hop_option_t *opt0, *limit0, *opt1, *limit1;
2541 u8 error0 = 0, error1 = 0;
2543 /* Prefetch next iteration. */
2545 vlib_buffer_t *p2, *p3;
2547 p2 = vlib_get_buffer (vm, from[2]);
2548 p3 = vlib_get_buffer (vm, from[3]);
2550 vlib_prefetch_buffer_header (p2, LOAD);
2551 vlib_prefetch_buffer_header (p3, LOAD);
2553 CLIB_PREFETCH (p2->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
2554 CLIB_PREFETCH (p3->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
2557 /* Speculatively enqueue b0, b1 to the current next frame */
2558 to_next[0] = bi0 = from[0];
2559 to_next[1] = bi1 = from[1];
2563 n_left_to_next -= 2;
2565 b0 = vlib_get_buffer (vm, bi0);
2566 b1 = vlib_get_buffer (vm, bi1);
2568 /* Default use the next_index from the adjacency. A HBH option rarely redirects to a different node */
2569 u32 adj_index0 = vnet_buffer (b0)->ip.adj_index[VLIB_TX];
2570 ip_adjacency_t *adj0 = ip_get_adjacency (lm, adj_index0);
2571 u32 adj_index1 = vnet_buffer (b1)->ip.adj_index[VLIB_TX];
2572 ip_adjacency_t *adj1 = ip_get_adjacency (lm, adj_index1);
2574 /* Default use the next_index from the adjacency. A HBH option rarely redirects to a different node */
2575 next0 = adj0->lookup_next_index;
2576 next1 = adj1->lookup_next_index;
2578 ip0 = vlib_buffer_get_current (b0);
2579 ip1 = vlib_buffer_get_current (b1);
2580 hbh0 = (ip6_hop_by_hop_header_t *) (ip0 + 1);
2581 hbh1 = (ip6_hop_by_hop_header_t *) (ip1 + 1);
2582 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2583 opt1 = (ip6_hop_by_hop_option_t *) (hbh1 + 1);
2585 (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 +
2586 ((hbh0->length + 1) << 3));
2588 (ip6_hop_by_hop_option_t *) ((u8 *) hbh1 +
2589 ((hbh1->length + 1) << 3));
2592 * Basic validity checks
2594 if ((hbh0->length + 1) << 3 >
2595 clib_net_to_host_u16 (ip0->payload_length))
2597 error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2598 next0 = IP_LOOKUP_NEXT_DROP;
2601 /* Scan the set of h-b-h options, process ones that we understand */
2602 error0 = ip6_scan_hbh_options (b0, ip0, hbh0, opt0, limit0, &next0);
2604 if ((hbh1->length + 1) << 3 >
2605 clib_net_to_host_u16 (ip1->payload_length))
2607 error1 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2608 next1 = IP_LOOKUP_NEXT_DROP;
2611 /* Scan the set of h-b-h options, process ones that we understand */
2612 error1 = ip6_scan_hbh_options (b1, ip1, hbh1, opt1, limit1, &next1);
2615 /* Has the classifier flagged this buffer for special treatment? */
2618 && (vnet_buffer (b0)->l2_classify.opaque_index & OI_DECAP)))
2619 next0 = hm->next_override;
2621 /* Has the classifier flagged this buffer for special treatment? */
2624 && (vnet_buffer (b1)->l2_classify.opaque_index & OI_DECAP)))
2625 next1 = hm->next_override;
2627 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)))
2629 if (b0->flags & VLIB_BUFFER_IS_TRACED)
2631 ip6_hop_by_hop_trace_t *t =
2632 vlib_add_trace (vm, node, b0, sizeof (*t));
2633 u32 trace_len = (hbh0->length + 1) << 3;
2634 t->next_index = next0;
2635 /* Capture the h-b-h option verbatim */
2638 ARRAY_LEN (t->option_data) ? trace_len :
2639 ARRAY_LEN (t->option_data);
2640 t->trace_len = trace_len;
2641 clib_memcpy (t->option_data, hbh0, trace_len);
2643 if (b1->flags & VLIB_BUFFER_IS_TRACED)
2645 ip6_hop_by_hop_trace_t *t =
2646 vlib_add_trace (vm, node, b1, sizeof (*t));
2647 u32 trace_len = (hbh1->length + 1) << 3;
2648 t->next_index = next1;
2649 /* Capture the h-b-h option verbatim */
2652 ARRAY_LEN (t->option_data) ? trace_len :
2653 ARRAY_LEN (t->option_data);
2654 t->trace_len = trace_len;
2655 clib_memcpy (t->option_data, hbh1, trace_len);
2660 b0->error = error_node->errors[error0];
2661 b1->error = error_node->errors[error1];
2663 /* verify speculative enqueue, maybe switch current next frame */
2664 vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
2665 n_left_to_next, bi0, bi1, next0,
2669 while (n_left_from > 0 && n_left_to_next > 0)
2675 ip6_hop_by_hop_header_t *hbh0;
2676 ip6_hop_by_hop_option_t *opt0, *limit0;
2679 /* Speculatively enqueue b0 to the current next frame */
2685 n_left_to_next -= 1;
2687 b0 = vlib_get_buffer (vm, bi0);
2689 * Default use the next_index from the adjacency.
2690 * A HBH option rarely redirects to a different node
2692 u32 adj_index0 = vnet_buffer (b0)->ip.adj_index[VLIB_TX];
2693 ip_adjacency_t *adj0 = ip_get_adjacency (lm, adj_index0);
2694 next0 = adj0->lookup_next_index;
2696 ip0 = vlib_buffer_get_current (b0);
2697 hbh0 = (ip6_hop_by_hop_header_t *) (ip0 + 1);
2698 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2700 (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 +
2701 ((hbh0->length + 1) << 3));
2704 * Basic validity checks
2706 if ((hbh0->length + 1) << 3 >
2707 clib_net_to_host_u16 (ip0->payload_length))
2709 error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2710 next0 = IP_LOOKUP_NEXT_DROP;
2714 /* Scan the set of h-b-h options, process ones that we understand */
2715 error0 = ip6_scan_hbh_options (b0, ip0, hbh0, opt0, limit0, &next0);
2718 /* Has the classifier flagged this buffer for special treatment? */
2721 && (vnet_buffer (b0)->l2_classify.opaque_index & OI_DECAP)))
2722 next0 = hm->next_override;
2724 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
2726 ip6_hop_by_hop_trace_t *t =
2727 vlib_add_trace (vm, node, b0, sizeof (*t));
2728 u32 trace_len = (hbh0->length + 1) << 3;
2729 t->next_index = next0;
2730 /* Capture the h-b-h option verbatim */
2733 ARRAY_LEN (t->option_data) ? trace_len :
2734 ARRAY_LEN (t->option_data);
2735 t->trace_len = trace_len;
2736 clib_memcpy (t->option_data, hbh0, trace_len);
2739 b0->error = error_node->errors[error0];
2741 /* verify speculative enqueue, maybe switch current next frame */
2742 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
2743 n_left_to_next, bi0, next0);
2745 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2747 return frame->n_vectors;
2751 VLIB_REGISTER_NODE (ip6_hop_by_hop_node) =
2753 .function = ip6_hop_by_hop,
2754 .name = "ip6-hop-by-hop",
2755 .sibling_of = "ip6-lookup",
2756 .vector_size = sizeof (u32),
2757 .format_trace = format_ip6_hop_by_hop_trace,
2758 .type = VLIB_NODE_TYPE_INTERNAL,
2759 .n_errors = ARRAY_LEN (ip6_hop_by_hop_error_strings),
2760 .error_strings = ip6_hop_by_hop_error_strings,
2765 VLIB_NODE_FUNCTION_MULTIARCH (ip6_hop_by_hop_node, ip6_hop_by_hop);
2767 static clib_error_t *
2768 ip6_hop_by_hop_init (vlib_main_t * vm)
2770 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2771 memset (hm->options, 0, sizeof (hm->options));
2772 memset (hm->trace, 0, sizeof (hm->trace));
2773 hm->next_override = IP6_LOOKUP_NEXT_POP_HOP_BY_HOP;
2777 VLIB_INIT_FUNCTION (ip6_hop_by_hop_init);
2780 ip6_hbh_set_next_override (uword next)
2782 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2784 hm->next_override = next;
2788 ip6_hbh_register_option (u8 option,
2789 int options (vlib_buffer_t * b, ip6_header_t * ip,
2790 ip6_hop_by_hop_option_t * opt),
2791 u8 * trace (u8 * s, ip6_hop_by_hop_option_t * opt))
2793 ip6_main_t *im = &ip6_main;
2794 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2796 ASSERT (option < ARRAY_LEN (hm->options));
2798 /* Already registered */
2799 if (hm->options[option])
2802 hm->options[option] = options;
2803 hm->trace[option] = trace;
2805 /* Set global variable */
2806 im->hbh_enabled = 1;
2812 ip6_hbh_unregister_option (u8 option)
2814 ip6_main_t *im = &ip6_main;
2815 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2817 ASSERT (option < ARRAY_LEN (hm->options));
2819 /* Not registered */
2820 if (!hm->options[option])
2823 hm->options[option] = NULL;
2824 hm->trace[option] = NULL;
2826 /* Disable global knob if this was the last option configured */
2829 for (i = 0; i < 256; i++)
2831 if (hm->options[option])
2838 im->hbh_enabled = 0;
2843 /* Global IP6 main. */
2844 ip6_main_t ip6_main;
2846 static clib_error_t *
2847 ip6_lookup_init (vlib_main_t * vm)
2849 ip6_main_t *im = &ip6_main;
2850 clib_error_t *error;
2853 if ((error = vlib_call_init_function (vm, vnet_feature_init)))
2856 for (i = 0; i < ARRAY_LEN (im->fib_masks); i++)
2863 for (j = 0; j < i0; j++)
2864 im->fib_masks[i].as_u32[j] = ~0;
2867 im->fib_masks[i].as_u32[i0] =
2868 clib_host_to_net_u32 (pow2_mask (i1) << (32 - i1));
2871 ip_lookup_init (&im->lookup_main, /* is_ip6 */ 1);
2873 if (im->lookup_table_nbuckets == 0)
2874 im->lookup_table_nbuckets = IP6_FIB_DEFAULT_HASH_NUM_BUCKETS;
2876 im->lookup_table_nbuckets = 1 << max_log2 (im->lookup_table_nbuckets);
2878 if (im->lookup_table_size == 0)
2879 im->lookup_table_size = IP6_FIB_DEFAULT_HASH_MEMORY_SIZE;
2881 BV (clib_bihash_init) (&(im->ip6_table[IP6_FIB_TABLE_FWDING].ip6_hash),
2882 "ip6 FIB fwding table",
2883 im->lookup_table_nbuckets, im->lookup_table_size);
2884 BV (clib_bihash_init) (&im->ip6_table[IP6_FIB_TABLE_NON_FWDING].ip6_hash,
2885 "ip6 FIB non-fwding table",
2886 im->lookup_table_nbuckets, im->lookup_table_size);
2888 /* Create FIB with index 0 and table id of 0. */
2889 fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6, 0);
2890 mfib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6, 0);
2894 pn = pg_get_node (ip6_lookup_node.index);
2895 pn->unformat_edit = unformat_pg_ip6_header;
2898 /* Unless explicitly configured, don't process HBH options */
2899 im->hbh_enabled = 0;
2902 icmp6_neighbor_solicitation_header_t p;
2904 memset (&p, 0, sizeof (p));
2906 p.ip.ip_version_traffic_class_and_flow_label =
2907 clib_host_to_net_u32 (0x6 << 28);
2908 p.ip.payload_length =
2909 clib_host_to_net_u16 (sizeof (p) -
2911 (icmp6_neighbor_solicitation_header_t, neighbor));
2912 p.ip.protocol = IP_PROTOCOL_ICMP6;
2913 p.ip.hop_limit = 255;
2914 ip6_set_solicited_node_multicast_address (&p.ip.dst_address, 0);
2916 p.neighbor.icmp.type = ICMP6_neighbor_solicitation;
2918 p.link_layer_option.header.type =
2919 ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address;
2920 p.link_layer_option.header.n_data_u64s =
2921 sizeof (p.link_layer_option) / sizeof (u64);
2923 vlib_packet_template_init (vm,
2924 &im->discover_neighbor_packet_template,
2926 /* alloc chunk size */ 8,
2927 "ip6 neighbor discovery");
2933 VLIB_INIT_FUNCTION (ip6_lookup_init);
2935 static clib_error_t *
2936 add_del_ip6_interface_table (vlib_main_t * vm,
2937 unformat_input_t * input,
2938 vlib_cli_command_t * cmd)
2940 vnet_main_t *vnm = vnet_get_main ();
2941 ip_interface_address_t *ia;
2942 clib_error_t *error = 0;
2943 u32 sw_if_index, table_id;
2947 if (!unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
2949 error = clib_error_return (0, "unknown interface `%U'",
2950 format_unformat_error, input);
2954 if (unformat (input, "%d", &table_id))
2958 error = clib_error_return (0, "expected table id `%U'",
2959 format_unformat_error, input);
2964 * If the interface already has in IP address, then a change int
2965 * VRF is not allowed. The IP address applied must first be removed.
2966 * We do not do that automatically here, since VPP has no knowledge
2967 * of whether thoses subnets are valid in the destination VRF.
2970 foreach_ip_interface_address (&ip6_main.lookup_main,
2972 1 /* honor unnumbered */,
2976 a = ip_interface_address_get_address (&ip6_main.lookup_main, ia);
2977 error = clib_error_return (0, "interface %U has address %U",
2978 format_vnet_sw_if_index_name, vnm,
2980 format_ip6_address, a);
2986 u32 fib_index = fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6,
2989 vec_validate (ip6_main.fib_index_by_sw_if_index, sw_if_index);
2990 ip6_main.fib_index_by_sw_if_index[sw_if_index] = fib_index;
2992 fib_index = mfib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6,
2995 vec_validate (ip6_main.mfib_index_by_sw_if_index, sw_if_index);
2996 ip6_main.mfib_index_by_sw_if_index[sw_if_index] = fib_index;
3005 * Place the indicated interface into the supplied IPv6 FIB table (also known
3006 * as a VRF). If the FIB table does not exist, this command creates it. To
3007 * display the current IPv6 FIB table, use the command '<em>show ip6 fib</em>'.
3008 * FIB table will only be displayed if a route has been added to the table, or
3009 * an IP Address is assigned to an interface in the table (which adds a route
3012 * @note IP addresses added after setting the interface IP table are added to
3013 * the indicated FIB table. If an IP address is added prior to changing the
3014 * table then this is an error. The control plane must remove these addresses
3015 * first and then change the table. VPP will not automatically move the
3016 * addresses from the old to the new table as it does not know the validity
3020 * Example of how to add an interface to an IPv6 FIB table (where 2 is the table-id):
3021 * @cliexcmd{set interface ip6 table GigabitEthernet2/0/0 2}
3024 VLIB_CLI_COMMAND (set_interface_ip6_table_command, static) =
3026 .path = "set interface ip6 table",
3027 .function = add_del_ip6_interface_table,
3028 .short_help = "set interface ip6 table <interface> <table-id>"
3033 ip6_link_local_address_from_ethernet_mac_address (ip6_address_t * ip,
3036 ip->as_u64[0] = clib_host_to_net_u64 (0xFE80000000000000ULL);
3037 /* Invert the "u" bit */
3038 ip->as_u8[8] = mac[0] ^ (1 << 1);
3039 ip->as_u8[9] = mac[1];
3040 ip->as_u8[10] = mac[2];
3041 ip->as_u8[11] = 0xFF;
3042 ip->as_u8[12] = 0xFE;
3043 ip->as_u8[13] = mac[3];
3044 ip->as_u8[14] = mac[4];
3045 ip->as_u8[15] = mac[5];
3049 ip6_ethernet_mac_address_from_link_local_address (u8 * mac,
3052 /* Invert the previously inverted "u" bit */
3053 mac[0] = ip->as_u8[8] ^ (1 << 1);
3054 mac[1] = ip->as_u8[9];
3055 mac[2] = ip->as_u8[10];
3056 mac[3] = ip->as_u8[13];
3057 mac[4] = ip->as_u8[14];
3058 mac[5] = ip->as_u8[15];
3061 static clib_error_t *
3062 test_ip6_link_command_fn (vlib_main_t * vm,
3063 unformat_input_t * input, vlib_cli_command_t * cmd)
3066 ip6_address_t _a, *a = &_a;
3068 if (unformat (input, "%U", unformat_ethernet_address, mac))
3070 ip6_link_local_address_from_ethernet_mac_address (a, mac);
3071 vlib_cli_output (vm, "Link local address: %U", format_ip6_address, a);
3072 ip6_ethernet_mac_address_from_link_local_address (mac, a);
3073 vlib_cli_output (vm, "Original MAC address: %U",
3074 format_ethernet_address, mac);
3081 * This command converts the given MAC Address into an IPv6 link-local
3085 * Example of how to create an IPv6 link-local address:
3086 * @cliexstart{test ip6 link 16:d9:e0:91:79:86}
3087 * Link local address: fe80::14d9:e0ff:fe91:7986
3088 * Original MAC address: 16:d9:e0:91:79:86
3092 VLIB_CLI_COMMAND (test_link_command, static) =
3094 .path = "test ip6 link",
3095 .function = test_ip6_link_command_fn,
3096 .short_help = "test ip6 link <mac-address>",
3101 vnet_set_ip6_flow_hash (u32 table_id, u32 flow_hash_config)
3103 ip6_main_t *im6 = &ip6_main;
3105 uword *p = hash_get (im6->fib_index_by_table_id, table_id);
3110 fib = ip6_fib_get (p[0]);
3112 fib->flow_hash_config = flow_hash_config;
3116 static clib_error_t *
3117 set_ip6_flow_hash_command_fn (vlib_main_t * vm,
3118 unformat_input_t * input,
3119 vlib_cli_command_t * cmd)
3123 u32 flow_hash_config = 0;
3126 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
3128 if (unformat (input, "table %d", &table_id))
3131 else if (unformat (input, #a)) { flow_hash_config |= v; matched=1;}
3132 foreach_flow_hash_bit
3139 return clib_error_return (0, "unknown input `%U'",
3140 format_unformat_error, input);
3142 rv = vnet_set_ip6_flow_hash (table_id, flow_hash_config);
3149 return clib_error_return (0, "no such FIB table %d", table_id);
3152 clib_warning ("BUG: illegal flow hash config 0x%x", flow_hash_config);
3160 * Configure the set of IPv6 fields used by the flow hash.
3164 * Example of how to set the flow hash on a given table:
3165 * @cliexcmd{set ip6 flow-hash table 8 dst sport dport proto}
3167 * Example of display the configured flow hash:
3168 * @cliexstart{show ip6 fib}
3169 * ipv6-VRF:0, fib_index 0, flow hash: src dst sport dport proto
3172 * [@0]: dpo-load-balance: [index:5 buckets:1 uRPF:5 to:[0:0]]
3173 * [0] [@0]: dpo-drop ip6
3176 * [@0]: dpo-load-balance: [index:10 buckets:1 uRPF:10 to:[0:0]]
3177 * [0] [@2]: dpo-receive
3180 * [@0]: dpo-load-balance: [index:8 buckets:1 uRPF:8 to:[0:0]]
3181 * [0] [@2]: dpo-receive
3184 * [@0]: dpo-load-balance: [index:7 buckets:1 uRPF:7 to:[0:0]]
3185 * [0] [@2]: dpo-receive
3188 * [@0]: dpo-load-balance: [index:9 buckets:1 uRPF:9 to:[0:0]]
3189 * [0] [@2]: dpo-receive
3190 * ff02::1:ff00:0/104
3192 * [@0]: dpo-load-balance: [index:6 buckets:1 uRPF:6 to:[0:0]]
3193 * [0] [@2]: dpo-receive
3194 * ipv6-VRF:8, fib_index 1, flow hash: dst sport dport proto
3197 * [@0]: dpo-load-balance: [index:21 buckets:1 uRPF:20 to:[0:0]]
3198 * [0] [@0]: dpo-drop ip6
3201 * [@0]: dpo-load-balance: [index:27 buckets:1 uRPF:26 to:[0:0]]
3202 * [0] [@4]: ipv6-glean: af_packet0
3205 * [@0]: dpo-load-balance: [index:28 buckets:1 uRPF:27 to:[0:0]]
3206 * [0] [@2]: dpo-receive: @::a:1:1:0:7 on af_packet0
3209 * [@0]: dpo-load-balance: [index:26 buckets:1 uRPF:25 to:[0:0]]
3210 * [0] [@2]: dpo-receive
3211 * fe80::fe:3eff:fe3e:9222/128
3213 * [@0]: dpo-load-balance: [index:29 buckets:1 uRPF:28 to:[0:0]]
3214 * [0] [@2]: dpo-receive: fe80::fe:3eff:fe3e:9222 on af_packet0
3217 * [@0]: dpo-load-balance: [index:24 buckets:1 uRPF:23 to:[0:0]]
3218 * [0] [@2]: dpo-receive
3221 * [@0]: dpo-load-balance: [index:23 buckets:1 uRPF:22 to:[0:0]]
3222 * [0] [@2]: dpo-receive
3225 * [@0]: dpo-load-balance: [index:25 buckets:1 uRPF:24 to:[0:0]]
3226 * [0] [@2]: dpo-receive
3227 * ff02::1:ff00:0/104
3229 * [@0]: dpo-load-balance: [index:22 buckets:1 uRPF:21 to:[0:0]]
3230 * [0] [@2]: dpo-receive
3235 VLIB_CLI_COMMAND (set_ip6_flow_hash_command, static) =
3237 .path = "set ip6 flow-hash",
3239 "set ip6 flow-hash table <table-id> [src] [dst] [sport] [dport] [proto] [reverse]",
3240 .function = set_ip6_flow_hash_command_fn,
3244 static clib_error_t *
3245 show_ip6_local_command_fn (vlib_main_t * vm,
3246 unformat_input_t * input, vlib_cli_command_t * cmd)
3248 ip6_main_t *im = &ip6_main;
3249 ip_lookup_main_t *lm = &im->lookup_main;
3252 vlib_cli_output (vm, "Protocols handled by ip6_local");
3253 for (i = 0; i < ARRAY_LEN (lm->local_next_by_ip_protocol); i++)
3255 if (lm->local_next_by_ip_protocol[i] != IP_LOCAL_NEXT_PUNT)
3256 vlib_cli_output (vm, "%d", i);
3264 * Display the set of protocols handled by the local IPv6 stack.
3267 * Example of how to display local protocol table:
3268 * @cliexstart{show ip6 local}
3269 * Protocols handled by ip6_local
3277 VLIB_CLI_COMMAND (show_ip6_local, static) =
3279 .path = "show ip6 local",
3280 .function = show_ip6_local_command_fn,
3281 .short_help = "show ip6 local",
3286 vnet_set_ip6_classify_intfc (vlib_main_t * vm, u32 sw_if_index,
3289 vnet_main_t *vnm = vnet_get_main ();
3290 vnet_interface_main_t *im = &vnm->interface_main;
3291 ip6_main_t *ipm = &ip6_main;
3292 ip_lookup_main_t *lm = &ipm->lookup_main;
3293 vnet_classify_main_t *cm = &vnet_classify_main;
3294 ip6_address_t *if_addr;
3296 if (pool_is_free_index (im->sw_interfaces, sw_if_index))
3297 return VNET_API_ERROR_NO_MATCHING_INTERFACE;
3299 if (table_index != ~0 && pool_is_free_index (cm->tables, table_index))
3300 return VNET_API_ERROR_NO_SUCH_ENTRY;
3302 vec_validate (lm->classify_table_index_by_sw_if_index, sw_if_index);
3303 lm->classify_table_index_by_sw_if_index[sw_if_index] = table_index;
3305 if_addr = ip6_interface_first_address (ipm, sw_if_index);
3307 if (NULL != if_addr)
3309 fib_prefix_t pfx = {
3311 .fp_proto = FIB_PROTOCOL_IP6,
3312 .fp_addr.ip6 = *if_addr,
3316 fib_index = fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4,
3320 if (table_index != (u32) ~ 0)
3322 dpo_id_t dpo = DPO_INVALID;
3327 classify_dpo_create (DPO_PROTO_IP6, table_index));
3329 fib_table_entry_special_dpo_add (fib_index,
3331 FIB_SOURCE_CLASSIFY,
3332 FIB_ENTRY_FLAG_NONE, &dpo);
3337 fib_table_entry_special_remove (fib_index,
3338 &pfx, FIB_SOURCE_CLASSIFY);
3345 static clib_error_t *
3346 set_ip6_classify_command_fn (vlib_main_t * vm,
3347 unformat_input_t * input,
3348 vlib_cli_command_t * cmd)
3350 u32 table_index = ~0;
3351 int table_index_set = 0;
3352 u32 sw_if_index = ~0;
3355 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
3357 if (unformat (input, "table-index %d", &table_index))
3358 table_index_set = 1;
3359 else if (unformat (input, "intfc %U", unformat_vnet_sw_interface,
3360 vnet_get_main (), &sw_if_index))
3366 if (table_index_set == 0)
3367 return clib_error_return (0, "classify table-index must be specified");
3369 if (sw_if_index == ~0)
3370 return clib_error_return (0, "interface / subif must be specified");
3372 rv = vnet_set_ip6_classify_intfc (vm, sw_if_index, table_index);
3379 case VNET_API_ERROR_NO_MATCHING_INTERFACE:
3380 return clib_error_return (0, "No such interface");
3382 case VNET_API_ERROR_NO_SUCH_ENTRY:
3383 return clib_error_return (0, "No such classifier table");
3389 * Assign a classification table to an interface. The classification
3390 * table is created using the '<em>classify table</em>' and '<em>classify session</em>'
3391 * commands. Once the table is create, use this command to filter packets
3395 * Example of how to assign a classification table to an interface:
3396 * @cliexcmd{set ip6 classify intfc GigabitEthernet2/0/0 table-index 1}
3399 VLIB_CLI_COMMAND (set_ip6_classify_command, static) =
3401 .path = "set ip6 classify",
3403 "set ip6 classify intfc <interface> table-index <classify-idx>",
3404 .function = set_ip6_classify_command_fn,
3408 static clib_error_t *
3409 ip6_config (vlib_main_t * vm, unformat_input_t * input)
3411 ip6_main_t *im = &ip6_main;
3416 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
3418 if (unformat (input, "hash-buckets %d", &tmp))
3420 else if (unformat (input, "heap-size %dm", &tmp))
3421 heapsize = ((u64) tmp) << 20;
3422 else if (unformat (input, "heap-size %dM", &tmp))
3423 heapsize = ((u64) tmp) << 20;
3424 else if (unformat (input, "heap-size %dg", &tmp))
3425 heapsize = ((u64) tmp) << 30;
3426 else if (unformat (input, "heap-size %dG", &tmp))
3427 heapsize = ((u64) tmp) << 30;
3429 return clib_error_return (0, "unknown input '%U'",
3430 format_unformat_error, input);
3433 im->lookup_table_nbuckets = nbuckets;
3434 im->lookup_table_size = heapsize;
3439 VLIB_EARLY_CONFIG_FUNCTION (ip6_config, "ip6");
3442 * fd.io coding-style-patch-verification: ON
3445 * eval: (c-set-style "gnu")