2 * Copyright (c) 2016 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
16 * ip/ip6_forward.c: IP v6 forwarding
18 * Copyright (c) 2008 Eliot Dresselhaus
20 * Permission is hereby granted, free of charge, to any person obtaining
21 * a copy of this software and associated documentation files (the
22 * "Software"), to deal in the Software without restriction, including
23 * without limitation the rights to use, copy, modify, merge, publish,
24 * distribute, sublicense, and/or sell copies of the Software, and to
25 * permit persons to whom the Software is furnished to do so, subject to
26 * the following conditions:
28 * The above copyright notice and this permission notice shall be
29 * included in all copies or substantial portions of the Software.
31 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
32 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
33 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
34 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
35 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
36 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
37 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
40 #include <vnet/vnet.h>
41 #include <vnet/ip/ip.h>
42 #include <vnet/ethernet/ethernet.h> /* for ethernet_header_t */
43 #include <vnet/srp/srp.h> /* for srp_hw_interface_class */
44 #include <vppinfra/cache.h>
45 #include <vnet/fib/fib_table.h>
46 #include <vnet/fib/ip6_fib.h>
47 #include <vnet/dpo/load_balance.h>
48 #include <vnet/dpo/classify_dpo.h>
50 #include <vppinfra/bihash_template.c>
54 * @brief IPv6 Forwarding.
56 * This file contains the source code for IPv6 forwarding.
60 ip6_forward_next_trace (vlib_main_t * vm,
61 vlib_node_runtime_t * node,
63 vlib_rx_or_tx_t which_adj_index);
66 ip6_lookup_inline (vlib_main_t * vm,
67 vlib_node_runtime_t * node, vlib_frame_t * frame)
69 ip6_main_t *im = &ip6_main;
70 vlib_combined_counter_main_t *cm = &load_balance_main.lbm_to_counters;
71 u32 n_left_from, n_left_to_next, *from, *to_next;
72 ip_lookup_next_t next;
73 u32 cpu_index = os_get_cpu_number ();
75 from = vlib_frame_vector_args (frame);
76 n_left_from = frame->n_vectors;
77 next = node->cached_next_index;
79 while (n_left_from > 0)
81 vlib_get_next_frame (vm, node, next, to_next, n_left_to_next);
83 while (n_left_from >= 4 && n_left_to_next >= 2)
85 vlib_buffer_t *p0, *p1;
86 u32 pi0, pi1, lbi0, lbi1, wrong_next;
87 ip_lookup_next_t next0, next1;
88 ip6_header_t *ip0, *ip1;
89 ip6_address_t *dst_addr0, *dst_addr1;
90 u32 fib_index0, fib_index1;
91 u32 flow_hash_config0, flow_hash_config1;
92 const dpo_id_t *dpo0, *dpo1;
93 const load_balance_t *lb0, *lb1;
95 /* Prefetch next iteration. */
97 vlib_buffer_t *p2, *p3;
99 p2 = vlib_get_buffer (vm, from[2]);
100 p3 = vlib_get_buffer (vm, from[3]);
102 vlib_prefetch_buffer_header (p2, LOAD);
103 vlib_prefetch_buffer_header (p3, LOAD);
104 CLIB_PREFETCH (p2->data, sizeof (ip0[0]), LOAD);
105 CLIB_PREFETCH (p3->data, sizeof (ip0[0]), LOAD);
108 pi0 = to_next[0] = from[0];
109 pi1 = to_next[1] = from[1];
111 p0 = vlib_get_buffer (vm, pi0);
112 p1 = vlib_get_buffer (vm, pi1);
114 ip0 = vlib_buffer_get_current (p0);
115 ip1 = vlib_buffer_get_current (p1);
117 dst_addr0 = &ip0->dst_address;
118 dst_addr1 = &ip1->dst_address;
121 vec_elt (im->fib_index_by_sw_if_index,
122 vnet_buffer (p0)->sw_if_index[VLIB_RX]);
124 vec_elt (im->fib_index_by_sw_if_index,
125 vnet_buffer (p1)->sw_if_index[VLIB_RX]);
127 fib_index0 = (vnet_buffer (p0)->sw_if_index[VLIB_TX] == (u32) ~ 0) ?
128 fib_index0 : vnet_buffer (p0)->sw_if_index[VLIB_TX];
129 fib_index1 = (vnet_buffer (p1)->sw_if_index[VLIB_TX] == (u32) ~ 0) ?
130 fib_index1 : vnet_buffer (p1)->sw_if_index[VLIB_TX];
132 lbi0 = ip6_fib_table_fwding_lookup (im, fib_index0, dst_addr0);
133 lbi1 = ip6_fib_table_fwding_lookup (im, fib_index1, dst_addr1);
135 lb0 = load_balance_get (lbi0);
136 lb1 = load_balance_get (lbi1);
138 vnet_buffer (p0)->ip.flow_hash = vnet_buffer (p1)->ip.flow_hash = 0;
140 if (PREDICT_FALSE (lb0->lb_n_buckets > 1))
142 flow_hash_config0 = lb0->lb_hash_config;
143 vnet_buffer (p0)->ip.flow_hash =
144 ip6_compute_flow_hash (ip0, flow_hash_config0);
146 if (PREDICT_FALSE (lb1->lb_n_buckets > 1))
148 flow_hash_config1 = lb1->lb_hash_config;
149 vnet_buffer (p1)->ip.flow_hash =
150 ip6_compute_flow_hash (ip1, flow_hash_config1);
153 ASSERT (lb0->lb_n_buckets > 0);
154 ASSERT (lb1->lb_n_buckets > 0);
155 ASSERT (is_pow2 (lb0->lb_n_buckets));
156 ASSERT (is_pow2 (lb1->lb_n_buckets));
157 dpo0 = load_balance_get_bucket_i (lb0,
158 (vnet_buffer (p0)->ip.flow_hash &
159 lb0->lb_n_buckets_minus_1));
160 dpo1 = load_balance_get_bucket_i (lb1,
161 (vnet_buffer (p1)->ip.flow_hash &
162 lb1->lb_n_buckets_minus_1));
164 next0 = dpo0->dpoi_next_node;
165 next1 = dpo1->dpoi_next_node;
167 /* Only process the HBH Option Header if explicitly configured to do so */
169 (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
171 next0 = (dpo_is_adj (dpo0) && im->hbh_enabled) ?
172 (ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next0;
175 (ip1->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
177 next1 = (dpo_is_adj (dpo1) && im->hbh_enabled) ?
178 (ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next1;
180 vnet_buffer (p0)->ip.adj_index[VLIB_TX] = dpo0->dpoi_index;
181 vnet_buffer (p1)->ip.adj_index[VLIB_TX] = dpo1->dpoi_index;
183 vlib_increment_combined_counter
184 (cm, cpu_index, lbi0, 1, vlib_buffer_length_in_chain (vm, p0));
185 vlib_increment_combined_counter
186 (cm, cpu_index, lbi1, 1, vlib_buffer_length_in_chain (vm, p1));
193 wrong_next = (next0 != next) + 2 * (next1 != next);
194 if (PREDICT_FALSE (wrong_next != 0))
203 vlib_set_next_frame_buffer (vm, node, next0, pi0);
210 vlib_set_next_frame_buffer (vm, node, next1, pi1);
217 vlib_set_next_frame_buffer (vm, node, next0, pi0);
218 vlib_set_next_frame_buffer (vm, node, next1, pi1);
222 vlib_put_next_frame (vm, node, next, n_left_to_next);
224 vlib_get_next_frame (vm, node, next, to_next,
231 while (n_left_from > 0 && n_left_to_next > 0)
236 ip_lookup_next_t next0;
238 ip6_address_t *dst_addr0;
239 u32 fib_index0, flow_hash_config0;
240 const dpo_id_t *dpo0;
245 p0 = vlib_get_buffer (vm, pi0);
247 ip0 = vlib_buffer_get_current (p0);
249 dst_addr0 = &ip0->dst_address;
252 vec_elt (im->fib_index_by_sw_if_index,
253 vnet_buffer (p0)->sw_if_index[VLIB_RX]);
255 (vnet_buffer (p0)->sw_if_index[VLIB_TX] ==
256 (u32) ~ 0) ? fib_index0 : vnet_buffer (p0)->sw_if_index[VLIB_TX];
258 flow_hash_config0 = ip6_fib_get (fib_index0)->flow_hash_config;
260 lbi0 = ip6_fib_table_fwding_lookup (im, fib_index0, dst_addr0);
262 lb0 = load_balance_get (lbi0);
264 vnet_buffer (p0)->ip.flow_hash = 0;
266 if (PREDICT_FALSE (lb0->lb_n_buckets > 1))
268 flow_hash_config0 = lb0->lb_hash_config;
269 vnet_buffer (p0)->ip.flow_hash =
270 ip6_compute_flow_hash (ip0, flow_hash_config0);
273 ASSERT (lb0->lb_n_buckets > 0);
274 ASSERT (is_pow2 (lb0->lb_n_buckets));
275 dpo0 = load_balance_get_bucket_i (lb0,
276 (vnet_buffer (p0)->ip.flow_hash &
277 lb0->lb_n_buckets_minus_1));
278 next0 = dpo0->dpoi_next_node;
280 /* Only process the HBH Option Header if explicitly configured to do so */
282 (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
284 next0 = (dpo_is_adj (dpo0) && im->hbh_enabled) ?
285 (ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next0;
287 vnet_buffer (p0)->ip.adj_index[VLIB_TX] = dpo0->dpoi_index;
289 vlib_increment_combined_counter
290 (cm, cpu_index, lbi0, 1, vlib_buffer_length_in_chain (vm, p0));
297 if (PREDICT_FALSE (next0 != next))
300 vlib_put_next_frame (vm, node, next, n_left_to_next);
302 vlib_get_next_frame (vm, node, next, to_next, n_left_to_next);
309 vlib_put_next_frame (vm, node, next, n_left_to_next);
312 if (node->flags & VLIB_NODE_FLAG_TRACE)
313 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
315 return frame->n_vectors;
319 ip6_add_interface_routes (vnet_main_t * vnm, u32 sw_if_index,
320 ip6_main_t * im, u32 fib_index,
321 ip_interface_address_t * a)
323 ip_lookup_main_t *lm = &im->lookup_main;
324 ip6_address_t *address = ip_interface_address_get_address (lm, a);
326 .fp_len = a->address_length,
327 .fp_proto = FIB_PROTOCOL_IP6,
328 .fp_addr.ip6 = *address,
331 a->neighbor_probe_adj_index = ~0;
332 if (a->address_length < 128)
334 fib_node_index_t fei;
336 fei = fib_table_entry_update_one_path (fib_index, &pfx, FIB_SOURCE_INTERFACE, (FIB_ENTRY_FLAG_CONNECTED | FIB_ENTRY_FLAG_ATTACHED), FIB_PROTOCOL_IP6, NULL, /* No next-hop address */
337 sw_if_index, ~0, // invalid FIB index
338 1, NULL, // no label stack
339 FIB_ROUTE_PATH_FLAG_NONE);
340 a->neighbor_probe_adj_index = fib_entry_get_adj (fei);
344 if (sw_if_index < vec_len (lm->classify_table_index_by_sw_if_index))
346 u32 classify_table_index =
347 lm->classify_table_index_by_sw_if_index[sw_if_index];
348 if (classify_table_index != (u32) ~ 0)
350 dpo_id_t dpo = DPO_INVALID;
355 classify_dpo_create (DPO_PROTO_IP6, classify_table_index));
357 fib_table_entry_special_dpo_add (fib_index,
360 FIB_ENTRY_FLAG_NONE, &dpo);
365 fib_table_entry_update_one_path (fib_index, &pfx, FIB_SOURCE_INTERFACE, (FIB_ENTRY_FLAG_CONNECTED | FIB_ENTRY_FLAG_LOCAL), FIB_PROTOCOL_IP6, &pfx.fp_addr, sw_if_index, ~0, // invalid FIB index
366 1, NULL, FIB_ROUTE_PATH_FLAG_NONE);
370 ip6_del_interface_routes (ip6_main_t * im,
372 ip6_address_t * address, u32 address_length)
375 .fp_len = address_length,
376 .fp_proto = FIB_PROTOCOL_IP6,
377 .fp_addr.ip6 = *address,
380 if (pfx.fp_len < 128)
382 fib_table_entry_delete (fib_index, &pfx, FIB_SOURCE_INTERFACE);
387 fib_table_entry_delete (fib_index, &pfx, FIB_SOURCE_INTERFACE);
391 ip6_sw_interface_enable_disable (u32 sw_if_index, u32 is_enable)
393 ip6_main_t *im = &ip6_main;
395 vec_validate_init_empty (im->ip_enabled_by_sw_if_index, sw_if_index, 0);
398 * enable/disable only on the 1<->0 transition
402 if (1 != ++im->ip_enabled_by_sw_if_index[sw_if_index])
407 /* The ref count is 0 when an address is removed from an interface that has
408 * no address - this is not a ciritical error */
409 if (0 == im->ip_enabled_by_sw_if_index[sw_if_index] ||
410 0 != --im->ip_enabled_by_sw_if_index[sw_if_index])
414 vnet_feature_enable_disable ("ip6-unicast", "ip6-lookup", sw_if_index,
417 vnet_feature_enable_disable ("ip6-multicast", "ip6-lookup", sw_if_index,
422 /* get first interface address */
424 ip6_interface_first_address (ip6_main_t * im,
426 ip_interface_address_t ** result_ia)
428 ip_lookup_main_t *lm = &im->lookup_main;
429 ip_interface_address_t *ia = 0;
430 ip6_address_t *result = 0;
433 foreach_ip_interface_address (lm, ia, sw_if_index,
434 1 /* honor unnumbered */,
436 ip6_address_t * a = ip_interface_address_get_address (lm, ia);
442 *result_ia = result ? ia : 0;
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 ip6_addr_fib_init (&ip6_af, address,
461 vec_elt (im->fib_index_by_sw_if_index, sw_if_index));
462 vec_add1 (addr_fib, ip6_af);
465 uword elts_before = pool_elts (lm->if_address_pool);
467 error = ip_interface_address_add_del
468 (lm, sw_if_index, addr_fib, address_length, is_del, &if_address_index);
472 /* Pool did not grow: add duplicate address. */
473 if (elts_before == pool_elts (lm->if_address_pool))
477 ip6_sw_interface_enable_disable (sw_if_index, !is_del);
480 ip6_del_interface_routes (im, ip6_af.fib_index, address, address_length);
482 ip6_add_interface_routes (vnm, sw_if_index,
483 im, ip6_af.fib_index,
484 pool_elt_at_index (lm->if_address_pool,
488 ip6_add_del_interface_address_callback_t *cb;
489 vec_foreach (cb, im->add_del_interface_address_callbacks)
490 cb->function (im, cb->function_opaque, sw_if_index,
491 address, address_length, if_address_index, is_del);
500 ip6_sw_interface_admin_up_down (vnet_main_t * vnm, u32 sw_if_index, u32 flags)
502 ip6_main_t *im = &ip6_main;
503 ip_interface_address_t *ia;
505 u32 is_admin_up, fib_index;
507 /* Fill in lookup tables with default table (0). */
508 vec_validate (im->fib_index_by_sw_if_index, sw_if_index);
510 vec_validate_init_empty (im->
511 lookup_main.if_address_pool_index_by_sw_if_index,
514 is_admin_up = (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) != 0;
516 fib_index = vec_elt (im->fib_index_by_sw_if_index, sw_if_index);
519 foreach_ip_interface_address (&im->lookup_main, ia, sw_if_index,
520 0 /* honor unnumbered */,
522 a = ip_interface_address_get_address (&im->lookup_main, ia);
524 ip6_add_interface_routes (vnm, sw_if_index,
528 ip6_del_interface_routes (im, fib_index,
529 a, ia->address_length);
536 VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION (ip6_sw_interface_admin_up_down);
538 /* Built-in ip6 unicast rx feature path definition */
540 VNET_FEATURE_ARC_INIT (ip6_unicast, static) =
542 .arc_name = "ip6-unicast",
543 .start_nodes = VNET_FEATURES ("ip6-input"),
544 .arc_index_ptr = &ip6_main.lookup_main.ucast_feature_arc_index,
547 VNET_FEATURE_INIT (ip6_flow_classify, static) =
549 .arc_name = "ip6-unicast",
550 .node_name = "ip6-flow-classify",
551 .runs_before = VNET_FEATURES ("ip6-inacl"),
554 VNET_FEATURE_INIT (ip6_inacl, static) =
556 .arc_name = "ip6-unicast",
557 .node_name = "ip6-inacl",
558 .runs_before = VNET_FEATURES ("ip6-policer-classify"),
561 VNET_FEATURE_INIT (ip6_policer_classify, static) =
563 .arc_name = "ip6-unicast",
564 .node_name = "ip6-policer-classify",
565 .runs_before = VNET_FEATURES ("ipsec-input-ip6"),
568 VNET_FEATURE_INIT (ip6_ipsec, static) =
570 .arc_name = "ip6-unicast",
571 .node_name = "ipsec-input-ip6",
572 .runs_before = VNET_FEATURES ("l2tp-decap"),
575 VNET_FEATURE_INIT (ip6_l2tp, static) =
577 .arc_name = "ip6-unicast",
578 .node_name = "l2tp-decap",
579 .runs_before = VNET_FEATURES ("vpath-input-ip6"),
582 VNET_FEATURE_INIT (ip6_vpath, static) =
584 .arc_name = "ip6-unicast",
585 .node_name = "vpath-input-ip6",
586 .runs_before = VNET_FEATURES ("ip6-lookup"),
589 VNET_FEATURE_INIT (ip6_lookup, static) =
591 .arc_name = "ip6-unicast",
592 .node_name = "ip6-lookup",
593 .runs_before = VNET_FEATURES ("ip6-drop"),
596 VNET_FEATURE_INIT (ip6_drop, static) =
598 .arc_name = "ip6-unicast",
599 .node_name = "ip6-drop",
600 .runs_before = 0, /*last feature*/
603 /* Built-in ip6 multicast rx feature path definition (none now) */
604 VNET_FEATURE_ARC_INIT (ip6_multicast, static) =
606 .arc_name = "ip6-multicast",
607 .start_nodes = VNET_FEATURES ("ip6-input"),
608 .arc_index_ptr = &ip6_main.lookup_main.mcast_feature_arc_index,
611 VNET_FEATURE_INIT (ip6_vpath_mc, static) = {
612 .arc_name = "ip6-multicast",
613 .node_name = "vpath-input-ip6",
614 .runs_before = VNET_FEATURES ("ip6-lookup"),
617 VNET_FEATURE_INIT (ip6_mc_lookup, static) = {
618 .arc_name = "ip6-multicast",
619 .node_name = "ip6-lookup",
620 .runs_before = VNET_FEATURES ("ip6-drop"),
623 VNET_FEATURE_INIT (ip6_drop_mc, static) = {
624 .arc_name = "ip6-multicast",
625 .node_name = "ip6-drop",
626 .runs_before = 0, /* last feature */
629 /* Built-in ip4 tx feature path definition */
630 VNET_FEATURE_ARC_INIT (ip6_output, static) =
632 .arc_name = "ip6-output",
633 .start_nodes = VNET_FEATURES ("ip6-rewrite", "ip6-midchain"),
634 .arc_index_ptr = &ip6_main.lookup_main.output_feature_arc_index,
637 VNET_FEATURE_INIT (ip6_ipsec_output, static) = {
638 .arc_name = "ip6-output",
639 .node_name = "ipsec-output-ip6",
640 .runs_before = VNET_FEATURES ("interface-output"),
643 VNET_FEATURE_INIT (ip6_interface_output, static) = {
644 .arc_name = "ip6-output",
645 .node_name = "interface-output",
646 .runs_before = 0, /* not before any other features */
651 ip6_sw_interface_add_del (vnet_main_t * vnm, u32 sw_if_index, u32 is_add)
653 vnet_feature_enable_disable ("ip6-unicast", "ip6-drop", sw_if_index,
656 vnet_feature_enable_disable ("ip6-multicast", "ip6-drop", sw_if_index,
659 vnet_feature_enable_disable ("ip6-output", "interface-output", sw_if_index,
662 return /* no error */ 0;
665 VNET_SW_INTERFACE_ADD_DEL_FUNCTION (ip6_sw_interface_add_del);
668 ip6_lookup (vlib_main_t * vm,
669 vlib_node_runtime_t * node, vlib_frame_t * frame)
671 return ip6_lookup_inline (vm, node, frame);
674 static u8 *format_ip6_lookup_trace (u8 * s, va_list * args);
677 VLIB_REGISTER_NODE (ip6_lookup_node) =
679 .function = ip6_lookup,
680 .name = "ip6-lookup",
681 .vector_size = sizeof (u32),
682 .format_trace = format_ip6_lookup_trace,
683 .n_next_nodes = IP6_LOOKUP_N_NEXT,
684 .next_nodes = IP6_LOOKUP_NEXT_NODES,
688 VLIB_NODE_FUNCTION_MULTIARCH (ip6_lookup_node, ip6_lookup);
691 ip6_load_balance (vlib_main_t * vm,
692 vlib_node_runtime_t * node, vlib_frame_t * frame)
694 vlib_combined_counter_main_t *cm = &load_balance_main.lbm_via_counters;
695 u32 n_left_from, n_left_to_next, *from, *to_next;
696 ip_lookup_next_t next;
697 u32 cpu_index = os_get_cpu_number ();
698 ip6_main_t *im = &ip6_main;
700 from = vlib_frame_vector_args (frame);
701 n_left_from = frame->n_vectors;
702 next = node->cached_next_index;
704 if (node->flags & VLIB_NODE_FLAG_TRACE)
705 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
707 while (n_left_from > 0)
709 vlib_get_next_frame (vm, node, next, to_next, n_left_to_next);
712 while (n_left_from >= 4 && n_left_to_next >= 2)
714 ip_lookup_next_t next0, next1;
715 const load_balance_t *lb0, *lb1;
716 vlib_buffer_t *p0, *p1;
717 u32 pi0, lbi0, hc0, pi1, lbi1, hc1;
718 const ip6_header_t *ip0, *ip1;
719 const dpo_id_t *dpo0, *dpo1;
721 /* Prefetch next iteration. */
723 vlib_buffer_t *p2, *p3;
725 p2 = vlib_get_buffer (vm, from[2]);
726 p3 = vlib_get_buffer (vm, from[3]);
728 vlib_prefetch_buffer_header (p2, STORE);
729 vlib_prefetch_buffer_header (p3, STORE);
731 CLIB_PREFETCH (p2->data, sizeof (ip0[0]), STORE);
732 CLIB_PREFETCH (p3->data, sizeof (ip0[0]), STORE);
735 pi0 = to_next[0] = from[0];
736 pi1 = to_next[1] = from[1];
743 p0 = vlib_get_buffer (vm, pi0);
744 p1 = vlib_get_buffer (vm, pi1);
746 ip0 = vlib_buffer_get_current (p0);
747 ip1 = vlib_buffer_get_current (p1);
748 lbi0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
749 lbi1 = vnet_buffer (p1)->ip.adj_index[VLIB_TX];
751 lb0 = load_balance_get (lbi0);
752 lb1 = load_balance_get (lbi1);
755 * this node is for via FIBs we can re-use the hash value from the
756 * to node if present.
757 * We don't want to use the same hash value at each level in the recursion
758 * graph as that would lead to polarisation
760 hc0 = vnet_buffer (p0)->ip.flow_hash = 0;
761 hc1 = vnet_buffer (p1)->ip.flow_hash = 0;
763 if (PREDICT_FALSE (lb0->lb_n_buckets > 1))
765 if (PREDICT_TRUE (vnet_buffer (p0)->ip.flow_hash))
767 hc0 = vnet_buffer (p0)->ip.flow_hash =
768 vnet_buffer (p0)->ip.flow_hash >> 1;
772 hc0 = vnet_buffer (p0)->ip.flow_hash =
773 ip6_compute_flow_hash (ip0, hc0);
776 if (PREDICT_FALSE (lb1->lb_n_buckets > 1))
778 if (PREDICT_TRUE (vnet_buffer (p1)->ip.flow_hash))
780 hc1 = vnet_buffer (p1)->ip.flow_hash =
781 vnet_buffer (p1)->ip.flow_hash >> 1;
785 hc1 = vnet_buffer (p1)->ip.flow_hash =
786 ip6_compute_flow_hash (ip1, hc1);
791 load_balance_get_bucket_i (lb0,
792 hc0 & (lb0->lb_n_buckets_minus_1));
794 load_balance_get_bucket_i (lb1,
795 hc1 & (lb1->lb_n_buckets_minus_1));
797 next0 = dpo0->dpoi_next_node;
798 next1 = dpo1->dpoi_next_node;
800 /* Only process the HBH Option Header if explicitly configured to do so */
802 (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
804 next0 = (dpo_is_adj (dpo0) && im->hbh_enabled) ?
805 (ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next0;
807 /* Only process the HBH Option Header if explicitly configured to do so */
809 (ip1->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
811 next1 = (dpo_is_adj (dpo1) && im->hbh_enabled) ?
812 (ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next1;
815 vnet_buffer (p0)->ip.adj_index[VLIB_TX] = dpo0->dpoi_index;
816 vnet_buffer (p1)->ip.adj_index[VLIB_TX] = dpo1->dpoi_index;
818 vlib_increment_combined_counter
819 (cm, cpu_index, lbi0, 1, vlib_buffer_length_in_chain (vm, p0));
820 vlib_increment_combined_counter
821 (cm, cpu_index, lbi1, 1, vlib_buffer_length_in_chain (vm, p1));
823 vlib_validate_buffer_enqueue_x2 (vm, node, next,
824 to_next, n_left_to_next,
825 pi0, pi1, next0, next1);
828 while (n_left_from > 0 && n_left_to_next > 0)
830 ip_lookup_next_t next0;
831 const load_balance_t *lb0;
834 const ip6_header_t *ip0;
835 const dpo_id_t *dpo0;
844 p0 = vlib_get_buffer (vm, pi0);
846 ip0 = vlib_buffer_get_current (p0);
847 lbi0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
849 lb0 = load_balance_get (lbi0);
851 hc0 = vnet_buffer (p0)->ip.flow_hash = 0;
852 if (PREDICT_FALSE (lb0->lb_n_buckets > 1))
854 if (PREDICT_TRUE (vnet_buffer (p0)->ip.flow_hash))
856 hc0 = vnet_buffer (p0)->ip.flow_hash =
857 vnet_buffer (p0)->ip.flow_hash >> 1;
861 hc0 = vnet_buffer (p0)->ip.flow_hash =
862 ip6_compute_flow_hash (ip0, hc0);
866 load_balance_get_bucket_i (lb0,
867 hc0 & (lb0->lb_n_buckets_minus_1));
869 next0 = dpo0->dpoi_next_node;
870 vnet_buffer (p0)->ip.adj_index[VLIB_TX] = dpo0->dpoi_index;
872 /* Only process the HBH Option Header if explicitly configured to do so */
874 (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
876 next0 = (dpo_is_adj (dpo0) && im->hbh_enabled) ?
877 (ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next0;
880 vlib_increment_combined_counter
881 (cm, cpu_index, lbi0, 1, vlib_buffer_length_in_chain (vm, p0));
883 vlib_validate_buffer_enqueue_x1 (vm, node, next,
884 to_next, n_left_to_next,
888 vlib_put_next_frame (vm, node, next, n_left_to_next);
891 return frame->n_vectors;
895 VLIB_REGISTER_NODE (ip6_load_balance_node) =
897 .function = ip6_load_balance,
898 .name = "ip6-load-balance",
899 .vector_size = sizeof (u32),
900 .sibling_of = "ip6-lookup",
901 .format_trace = format_ip6_lookup_trace,
905 VLIB_NODE_FUNCTION_MULTIARCH (ip6_load_balance_node, ip6_load_balance);
909 /* Adjacency taken. */
914 /* Packet data, possibly *after* rewrite. */
915 u8 packet_data[128 - 1 * sizeof (u32)];
917 ip6_forward_next_trace_t;
920 format_ip6_forward_next_trace (u8 * s, va_list * args)
922 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
923 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
924 ip6_forward_next_trace_t *t = va_arg (*args, ip6_forward_next_trace_t *);
925 uword indent = format_get_indent (s);
927 s = format (s, "%U%U",
928 format_white_space, indent,
929 format_ip6_header, t->packet_data, sizeof (t->packet_data));
934 format_ip6_lookup_trace (u8 * s, va_list * args)
936 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
937 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
938 ip6_forward_next_trace_t *t = va_arg (*args, ip6_forward_next_trace_t *);
939 uword indent = format_get_indent (s);
941 s = format (s, "fib %d dpo-idx %d flow hash: 0x%08x",
942 t->fib_index, t->adj_index, t->flow_hash);
943 s = format (s, "\n%U%U",
944 format_white_space, indent,
945 format_ip6_header, t->packet_data, sizeof (t->packet_data));
951 format_ip6_rewrite_trace (u8 * s, va_list * args)
953 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
954 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
955 ip6_forward_next_trace_t *t = va_arg (*args, ip6_forward_next_trace_t *);
956 vnet_main_t *vnm = vnet_get_main ();
957 uword indent = format_get_indent (s);
959 s = format (s, "tx_sw_if_index %d adj-idx %d : %U flow hash: 0x%08x",
960 t->fib_index, t->adj_index, format_ip_adjacency,
961 t->adj_index, FORMAT_IP_ADJACENCY_NONE, t->flow_hash);
962 s = format (s, "\n%U%U",
963 format_white_space, indent,
964 format_ip_adjacency_packet_data,
965 vnm, t->adj_index, t->packet_data, sizeof (t->packet_data));
969 /* Common trace function for all ip6-forward next nodes. */
971 ip6_forward_next_trace (vlib_main_t * vm,
972 vlib_node_runtime_t * node,
973 vlib_frame_t * frame, vlib_rx_or_tx_t which_adj_index)
976 ip6_main_t *im = &ip6_main;
978 n_left = frame->n_vectors;
979 from = vlib_frame_vector_args (frame);
984 vlib_buffer_t *b0, *b1;
985 ip6_forward_next_trace_t *t0, *t1;
987 /* Prefetch next iteration. */
988 vlib_prefetch_buffer_with_index (vm, from[2], LOAD);
989 vlib_prefetch_buffer_with_index (vm, from[3], LOAD);
994 b0 = vlib_get_buffer (vm, bi0);
995 b1 = vlib_get_buffer (vm, bi1);
997 if (b0->flags & VLIB_BUFFER_IS_TRACED)
999 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
1000 t0->adj_index = vnet_buffer (b0)->ip.adj_index[which_adj_index];
1001 t0->flow_hash = vnet_buffer (b0)->ip.flow_hash;
1003 (vnet_buffer (b0)->sw_if_index[VLIB_TX] !=
1004 (u32) ~ 0) ? vnet_buffer (b0)->sw_if_index[VLIB_TX] :
1005 vec_elt (im->fib_index_by_sw_if_index,
1006 vnet_buffer (b0)->sw_if_index[VLIB_RX]);
1008 clib_memcpy (t0->packet_data,
1009 vlib_buffer_get_current (b0),
1010 sizeof (t0->packet_data));
1012 if (b1->flags & VLIB_BUFFER_IS_TRACED)
1014 t1 = vlib_add_trace (vm, node, b1, sizeof (t1[0]));
1015 t1->adj_index = vnet_buffer (b1)->ip.adj_index[which_adj_index];
1016 t1->flow_hash = vnet_buffer (b1)->ip.flow_hash;
1018 (vnet_buffer (b1)->sw_if_index[VLIB_TX] !=
1019 (u32) ~ 0) ? vnet_buffer (b1)->sw_if_index[VLIB_TX] :
1020 vec_elt (im->fib_index_by_sw_if_index,
1021 vnet_buffer (b1)->sw_if_index[VLIB_RX]);
1023 clib_memcpy (t1->packet_data,
1024 vlib_buffer_get_current (b1),
1025 sizeof (t1->packet_data));
1035 ip6_forward_next_trace_t *t0;
1039 b0 = vlib_get_buffer (vm, bi0);
1041 if (b0->flags & VLIB_BUFFER_IS_TRACED)
1043 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
1044 t0->adj_index = vnet_buffer (b0)->ip.adj_index[which_adj_index];
1045 t0->flow_hash = vnet_buffer (b0)->ip.flow_hash;
1047 (vnet_buffer (b0)->sw_if_index[VLIB_TX] !=
1048 (u32) ~ 0) ? vnet_buffer (b0)->sw_if_index[VLIB_TX] :
1049 vec_elt (im->fib_index_by_sw_if_index,
1050 vnet_buffer (b0)->sw_if_index[VLIB_RX]);
1052 clib_memcpy (t0->packet_data,
1053 vlib_buffer_get_current (b0),
1054 sizeof (t0->packet_data));
1062 ip6_drop_or_punt (vlib_main_t * vm,
1063 vlib_node_runtime_t * node,
1064 vlib_frame_t * frame, ip6_error_t error_code)
1066 u32 *buffers = vlib_frame_vector_args (frame);
1067 uword n_packets = frame->n_vectors;
1069 vlib_error_drop_buffers (vm, node, buffers,
1073 ip6_input_node.index, error_code);
1075 if (node->flags & VLIB_NODE_FLAG_TRACE)
1076 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
1082 ip6_drop (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
1084 return ip6_drop_or_punt (vm, node, frame, IP6_ERROR_ADJACENCY_DROP);
1088 ip6_punt (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
1090 return ip6_drop_or_punt (vm, node, frame, IP6_ERROR_ADJACENCY_PUNT);
1094 VLIB_REGISTER_NODE (ip6_drop_node, static) =
1096 .function = ip6_drop,
1098 .vector_size = sizeof (u32),
1099 .format_trace = format_ip6_forward_next_trace,
1103 [0] = "error-drop",},
1107 VLIB_NODE_FUNCTION_MULTIARCH (ip6_drop_node, ip6_drop);
1110 VLIB_REGISTER_NODE (ip6_punt_node, static) =
1112 .function = ip6_punt,
1114 .vector_size = sizeof (u32),
1115 .format_trace = format_ip6_forward_next_trace,
1119 [0] = "error-punt",},
1123 VLIB_NODE_FUNCTION_MULTIARCH (ip6_punt_node, ip6_punt);
1126 VLIB_REGISTER_NODE (ip6_multicast_node, static) =
1128 .function = ip6_drop,
1129 .name = "ip6-multicast",
1130 .vector_size = sizeof (u32),
1131 .format_trace = format_ip6_forward_next_trace,
1141 /* Compute TCP/UDP/ICMP6 checksum in software. */
1143 ip6_tcp_udp_icmp_compute_checksum (vlib_main_t * vm, vlib_buffer_t * p0,
1144 ip6_header_t * ip0, int *bogus_lengthp)
1147 u16 sum16, payload_length_host_byte_order;
1148 u32 i, n_this_buffer, n_bytes_left;
1149 u32 headers_size = sizeof (ip0[0]);
1150 void *data_this_buffer;
1152 ASSERT (bogus_lengthp);
1155 /* Initialize checksum with ip header. */
1156 sum0 = ip0->payload_length + clib_host_to_net_u16 (ip0->protocol);
1157 payload_length_host_byte_order = clib_net_to_host_u16 (ip0->payload_length);
1158 data_this_buffer = (void *) (ip0 + 1);
1160 for (i = 0; i < ARRAY_LEN (ip0->src_address.as_uword); i++)
1162 sum0 = ip_csum_with_carry (sum0,
1163 clib_mem_unaligned (&ip0->
1164 src_address.as_uword[i],
1167 ip_csum_with_carry (sum0,
1168 clib_mem_unaligned (&ip0->dst_address.as_uword[i],
1172 /* some icmp packets may come with a "router alert" hop-by-hop extension header (e.g., mldv2 packets) */
1173 if (PREDICT_FALSE (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
1176 ip6_hop_by_hop_ext_t *ext_hdr =
1177 (ip6_hop_by_hop_ext_t *) data_this_buffer;
1179 /* validate really icmp6 next */
1180 ASSERT (ext_hdr->next_hdr == IP_PROTOCOL_ICMP6);
1182 skip_bytes = 8 * (1 + ext_hdr->n_data_u64s);
1183 data_this_buffer = (void *) ((u8 *) data_this_buffer + skip_bytes);
1185 payload_length_host_byte_order -= skip_bytes;
1186 headers_size += skip_bytes;
1189 n_bytes_left = n_this_buffer = payload_length_host_byte_order;
1190 if (p0 && n_this_buffer + headers_size > p0->current_length)
1192 p0->current_length >
1193 headers_size ? p0->current_length - headers_size : 0;
1196 sum0 = ip_incremental_checksum (sum0, data_this_buffer, n_this_buffer);
1197 n_bytes_left -= n_this_buffer;
1198 if (n_bytes_left == 0)
1201 if (!(p0->flags & VLIB_BUFFER_NEXT_PRESENT))
1206 p0 = vlib_get_buffer (vm, p0->next_buffer);
1207 data_this_buffer = vlib_buffer_get_current (p0);
1208 n_this_buffer = p0->current_length;
1211 sum16 = ~ip_csum_fold (sum0);
1217 ip6_tcp_udp_icmp_validate_checksum (vlib_main_t * vm, vlib_buffer_t * p0)
1219 ip6_header_t *ip0 = vlib_buffer_get_current (p0);
1224 /* some icmp packets may come with a "router alert" hop-by-hop extension header (e.g., mldv2 packets) */
1225 ASSERT (ip0->protocol == IP_PROTOCOL_TCP
1226 || ip0->protocol == IP_PROTOCOL_ICMP6
1227 || ip0->protocol == IP_PROTOCOL_UDP
1228 || ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS);
1230 udp0 = (void *) (ip0 + 1);
1231 if (ip0->protocol == IP_PROTOCOL_UDP && udp0->checksum == 0)
1233 p0->flags |= (IP_BUFFER_L4_CHECKSUM_COMPUTED
1234 | IP_BUFFER_L4_CHECKSUM_CORRECT);
1238 sum16 = ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip0, &bogus_length);
1240 p0->flags |= (IP_BUFFER_L4_CHECKSUM_COMPUTED
1241 | ((sum16 == 0) << LOG2_IP_BUFFER_L4_CHECKSUM_CORRECT));
1246 /* ip6_locate_header
1248 * This function is to search for the header specified by the find_hdr number.
1249 * 1. If the find_hdr < 0 then it finds and returns the protocol number and
1250 * offset stored in *offset of the transport or ESP header in the chain if
1252 * 2. If a header with find_hdr > 0 protocol number is found then the
1253 * offset is stored in *offset and protocol number of the header is
1255 * 3. If find_hdr header is not found or packet is malformed or
1256 * it is a non-first fragment -1 is returned.
1259 ip6_locate_header (vlib_buffer_t * p0,
1260 ip6_header_t * ip0, int find_hdr, u32 * offset)
1262 u8 next_proto = ip0->protocol;
1266 u8 *temp_nxthdr = 0;
1269 next_header = ip6_next_header (ip0);
1270 cur_offset = sizeof (ip6_header_t);
1273 done = (next_proto == find_hdr);
1276 (u8 *) vlib_buffer_get_current (p0) + p0->current_length))
1278 //A malicious packet could set an extension header with a too big size
1283 if ((!ip6_ext_hdr (next_proto)) || next_proto == IP_PROTOCOL_IP6_NONXT)
1289 if (next_proto == IP_PROTOCOL_IPV6_FRAGMENTATION)
1291 ip6_frag_hdr_t *frag_hdr = (ip6_frag_hdr_t *) next_header;
1292 u16 frag_off = ip6_frag_hdr_offset (frag_hdr);
1293 /* Non first fragment return -1 */
1296 exthdr_len = sizeof (ip6_frag_hdr_t);
1297 temp_nxthdr = next_header + exthdr_len;
1299 else if (next_proto == IP_PROTOCOL_IPSEC_AH)
1302 ip6_ext_authhdr_len (((ip6_ext_header_t *) next_header));
1303 temp_nxthdr = next_header + exthdr_len;
1308 ip6_ext_header_len (((ip6_ext_header_t *) next_header));
1309 temp_nxthdr = next_header + exthdr_len;
1311 next_proto = ((ip6_ext_header_t *) next_header)->next_hdr;
1312 next_header = temp_nxthdr;
1313 cur_offset += exthdr_len;
1316 *offset = cur_offset;
1317 return (next_proto);
1321 ip6_local (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
1323 ip6_main_t *im = &ip6_main;
1324 ip_lookup_main_t *lm = &im->lookup_main;
1325 ip_local_next_t next_index;
1326 u32 *from, *to_next, n_left_from, n_left_to_next;
1327 vlib_node_runtime_t *error_node =
1328 vlib_node_get_runtime (vm, ip6_input_node.index);
1330 from = vlib_frame_vector_args (frame);
1331 n_left_from = frame->n_vectors;
1332 next_index = node->cached_next_index;
1334 if (node->flags & VLIB_NODE_FLAG_TRACE)
1335 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
1337 while (n_left_from > 0)
1339 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1341 while (n_left_from >= 4 && n_left_to_next >= 2)
1343 vlib_buffer_t *p0, *p1;
1344 ip6_header_t *ip0, *ip1;
1345 udp_header_t *udp0, *udp1;
1346 u32 pi0, ip_len0, udp_len0, flags0, next0;
1347 u32 pi1, ip_len1, udp_len1, flags1, next1;
1348 i32 len_diff0, len_diff1;
1349 u8 error0, type0, good_l4_checksum0;
1350 u8 error1, type1, good_l4_checksum1;
1351 u32 udp_offset0, udp_offset1;
1353 pi0 = to_next[0] = from[0];
1354 pi1 = to_next[1] = from[1];
1358 n_left_to_next -= 2;
1360 p0 = vlib_get_buffer (vm, pi0);
1361 p1 = vlib_get_buffer (vm, pi1);
1363 ip0 = vlib_buffer_get_current (p0);
1364 ip1 = vlib_buffer_get_current (p1);
1366 vnet_buffer (p0)->ip.start_of_ip_header = p0->current_data;
1367 vnet_buffer (p1)->ip.start_of_ip_header = p1->current_data;
1369 type0 = lm->builtin_protocol_by_ip_protocol[ip0->protocol];
1370 type1 = lm->builtin_protocol_by_ip_protocol[ip1->protocol];
1372 next0 = lm->local_next_by_ip_protocol[ip0->protocol];
1373 next1 = lm->local_next_by_ip_protocol[ip1->protocol];
1378 good_l4_checksum0 = (flags0 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0;
1379 good_l4_checksum1 = (flags1 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0;
1383 /* Skip HBH local processing */
1385 (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
1387 ip6_hop_by_hop_ext_t *ext_hdr =
1388 (ip6_hop_by_hop_ext_t *) ip6_next_header (ip0);
1389 next0 = lm->local_next_by_ip_protocol[ext_hdr->next_hdr];
1390 type0 = lm->builtin_protocol_by_ip_protocol[ext_hdr->next_hdr];
1393 (ip1->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
1395 ip6_hop_by_hop_ext_t *ext_hdr =
1396 (ip6_hop_by_hop_ext_t *) ip6_next_header (ip1);
1397 next1 = lm->local_next_by_ip_protocol[ext_hdr->next_hdr];
1398 type1 = lm->builtin_protocol_by_ip_protocol[ext_hdr->next_hdr];
1400 if (PREDICT_TRUE (IP_PROTOCOL_UDP == ip6_locate_header (p0, ip0,
1404 udp0 = (udp_header_t *) ((u8 *) ip0 + udp_offset0);
1405 /* Don't verify UDP checksum for packets with explicit zero checksum. */
1406 good_l4_checksum0 |= type0 == IP_BUILTIN_PROTOCOL_UDP
1407 && udp0->checksum == 0;
1408 /* Verify UDP length. */
1409 ip_len0 = clib_net_to_host_u16 (ip0->payload_length);
1410 udp_len0 = clib_net_to_host_u16 (udp0->length);
1411 len_diff0 = ip_len0 - udp_len0;
1413 if (PREDICT_TRUE (IP_PROTOCOL_UDP == ip6_locate_header (p1, ip1,
1417 udp1 = (udp_header_t *) ((u8 *) ip1 + udp_offset1);
1418 /* Don't verify UDP checksum for packets with explicit zero checksum. */
1419 good_l4_checksum1 |= type1 == IP_BUILTIN_PROTOCOL_UDP
1420 && udp1->checksum == 0;
1421 /* Verify UDP length. */
1422 ip_len1 = clib_net_to_host_u16 (ip1->payload_length);
1423 udp_len1 = clib_net_to_host_u16 (udp1->length);
1424 len_diff1 = ip_len1 - udp_len1;
1427 good_l4_checksum0 |= type0 == IP_BUILTIN_PROTOCOL_UNKNOWN;
1428 good_l4_checksum1 |= type1 == IP_BUILTIN_PROTOCOL_UNKNOWN;
1430 len_diff0 = type0 == IP_BUILTIN_PROTOCOL_UDP ? len_diff0 : 0;
1431 len_diff1 = type1 == IP_BUILTIN_PROTOCOL_UDP ? len_diff1 : 0;
1433 if (PREDICT_FALSE (type0 != IP_BUILTIN_PROTOCOL_UNKNOWN
1434 && !good_l4_checksum0
1435 && !(flags0 & IP_BUFFER_L4_CHECKSUM_COMPUTED)))
1437 flags0 = ip6_tcp_udp_icmp_validate_checksum (vm, p0);
1439 (flags0 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0;
1441 if (PREDICT_FALSE (type1 != IP_BUILTIN_PROTOCOL_UNKNOWN
1442 && !good_l4_checksum1
1443 && !(flags1 & IP_BUFFER_L4_CHECKSUM_COMPUTED)))
1445 flags1 = ip6_tcp_udp_icmp_validate_checksum (vm, p1);
1447 (flags1 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0;
1450 error0 = error1 = IP6_ERROR_UNKNOWN_PROTOCOL;
1452 error0 = len_diff0 < 0 ? IP6_ERROR_UDP_LENGTH : error0;
1453 error1 = len_diff1 < 0 ? IP6_ERROR_UDP_LENGTH : error1;
1455 ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_UDP ==
1456 IP6_ERROR_UDP_CHECKSUM);
1457 ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_ICMP ==
1458 IP6_ERROR_ICMP_CHECKSUM);
1460 (!good_l4_checksum0 ? IP6_ERROR_UDP_CHECKSUM + type0 : error0);
1462 (!good_l4_checksum1 ? IP6_ERROR_UDP_CHECKSUM + type1 : error1);
1464 /* Drop packets from unroutable hosts. */
1465 /* If this is a neighbor solicitation (ICMP), skip source RPF check */
1466 if (error0 == IP6_ERROR_UNKNOWN_PROTOCOL &&
1467 type0 != IP_BUILTIN_PROTOCOL_ICMP &&
1468 !ip6_address_is_link_local_unicast (&ip0->src_address))
1470 u32 src_adj_index0 = ip6_src_lookup_for_packet (im, p0, ip0);
1471 error0 = (ADJ_INDEX_INVALID == src_adj_index0
1472 ? IP6_ERROR_SRC_LOOKUP_MISS : error0);
1474 if (error1 == IP6_ERROR_UNKNOWN_PROTOCOL &&
1475 type1 != IP_BUILTIN_PROTOCOL_ICMP &&
1476 !ip6_address_is_link_local_unicast (&ip1->src_address))
1478 u32 src_adj_index1 = ip6_src_lookup_for_packet (im, p1, ip1);
1479 error1 = (ADJ_INDEX_INVALID == src_adj_index1
1480 ? IP6_ERROR_SRC_LOOKUP_MISS : error1);
1484 error0 != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next0;
1486 error1 != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next1;
1488 p0->error = error_node->errors[error0];
1489 p1->error = error_node->errors[error1];
1491 vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
1492 to_next, n_left_to_next,
1493 pi0, pi1, next0, next1);
1496 while (n_left_from > 0 && n_left_to_next > 0)
1501 u32 pi0, ip_len0, udp_len0, flags0, next0;
1503 u8 error0, type0, good_l4_checksum0;
1506 pi0 = to_next[0] = from[0];
1510 n_left_to_next -= 1;
1512 p0 = vlib_get_buffer (vm, pi0);
1514 ip0 = vlib_buffer_get_current (p0);
1516 vnet_buffer (p0)->ip.start_of_ip_header = p0->current_data;
1518 type0 = lm->builtin_protocol_by_ip_protocol[ip0->protocol];
1519 next0 = lm->local_next_by_ip_protocol[ip0->protocol];
1523 good_l4_checksum0 = (flags0 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0;
1526 /* Skip HBH local processing */
1528 (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
1530 ip6_hop_by_hop_ext_t *ext_hdr =
1531 (ip6_hop_by_hop_ext_t *) ip6_next_header (ip0);
1532 next0 = lm->local_next_by_ip_protocol[ext_hdr->next_hdr];
1533 type0 = lm->builtin_protocol_by_ip_protocol[ext_hdr->next_hdr];
1535 if (PREDICT_TRUE (IP_PROTOCOL_UDP == ip6_locate_header (p0, ip0,
1539 udp0 = (udp_header_t *) ((u8 *) ip0 + udp_offset0);
1540 /* Don't verify UDP checksum for packets with explicit zero checksum. */
1541 good_l4_checksum0 |= type0 == IP_BUILTIN_PROTOCOL_UDP
1542 && udp0->checksum == 0;
1543 /* Verify UDP length. */
1544 ip_len0 = clib_net_to_host_u16 (ip0->payload_length);
1545 udp_len0 = clib_net_to_host_u16 (udp0->length);
1546 len_diff0 = ip_len0 - udp_len0;
1549 good_l4_checksum0 |= type0 == IP_BUILTIN_PROTOCOL_UNKNOWN;
1550 len_diff0 = type0 == IP_BUILTIN_PROTOCOL_UDP ? len_diff0 : 0;
1552 if (PREDICT_FALSE (type0 != IP_BUILTIN_PROTOCOL_UNKNOWN
1553 && !good_l4_checksum0
1554 && !(flags0 & IP_BUFFER_L4_CHECKSUM_COMPUTED)))
1556 flags0 = ip6_tcp_udp_icmp_validate_checksum (vm, p0);
1558 (flags0 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0;
1561 error0 = IP6_ERROR_UNKNOWN_PROTOCOL;
1563 error0 = len_diff0 < 0 ? IP6_ERROR_UDP_LENGTH : error0;
1565 ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_UDP ==
1566 IP6_ERROR_UDP_CHECKSUM);
1567 ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_ICMP ==
1568 IP6_ERROR_ICMP_CHECKSUM);
1570 (!good_l4_checksum0 ? IP6_ERROR_UDP_CHECKSUM + type0 : error0);
1572 /* If this is a neighbor solicitation (ICMP), skip source RPF check */
1573 if (error0 == IP6_ERROR_UNKNOWN_PROTOCOL &&
1574 type0 != IP_BUILTIN_PROTOCOL_ICMP &&
1575 !ip6_address_is_link_local_unicast (&ip0->src_address))
1577 u32 src_adj_index0 = ip6_src_lookup_for_packet (im, p0, ip0);
1578 error0 = (ADJ_INDEX_INVALID == src_adj_index0
1579 ? IP6_ERROR_SRC_LOOKUP_MISS : error0);
1583 error0 != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next0;
1585 p0->error = error_node->errors[error0];
1587 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1588 to_next, n_left_to_next,
1592 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1595 return frame->n_vectors;
1599 VLIB_REGISTER_NODE (ip6_local_node, static) =
1601 .function = ip6_local,
1602 .name = "ip6-local",
1603 .vector_size = sizeof (u32),
1604 .format_trace = format_ip6_forward_next_trace,
1605 .n_next_nodes = IP_LOCAL_N_NEXT,
1608 [IP_LOCAL_NEXT_DROP] = "error-drop",
1609 [IP_LOCAL_NEXT_PUNT] = "error-punt",
1610 [IP_LOCAL_NEXT_UDP_LOOKUP] = "ip6-udp-lookup",
1611 [IP_LOCAL_NEXT_ICMP] = "ip6-icmp-input",
1616 VLIB_NODE_FUNCTION_MULTIARCH (ip6_local_node, ip6_local);
1619 ip6_register_protocol (u32 protocol, u32 node_index)
1621 vlib_main_t *vm = vlib_get_main ();
1622 ip6_main_t *im = &ip6_main;
1623 ip_lookup_main_t *lm = &im->lookup_main;
1625 ASSERT (protocol < ARRAY_LEN (lm->local_next_by_ip_protocol));
1626 lm->local_next_by_ip_protocol[protocol] =
1627 vlib_node_add_next (vm, ip6_local_node.index, node_index);
1632 IP6_DISCOVER_NEIGHBOR_NEXT_DROP,
1633 IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX,
1634 IP6_DISCOVER_NEIGHBOR_N_NEXT,
1635 } ip6_discover_neighbor_next_t;
1639 IP6_DISCOVER_NEIGHBOR_ERROR_DROP,
1640 IP6_DISCOVER_NEIGHBOR_ERROR_REQUEST_SENT,
1641 IP6_DISCOVER_NEIGHBOR_ERROR_NO_SOURCE_ADDRESS,
1642 } ip6_discover_neighbor_error_t;
1645 ip6_discover_neighbor_inline (vlib_main_t * vm,
1646 vlib_node_runtime_t * node,
1647 vlib_frame_t * frame, int is_glean)
1649 vnet_main_t *vnm = vnet_get_main ();
1650 ip6_main_t *im = &ip6_main;
1651 ip_lookup_main_t *lm = &im->lookup_main;
1652 u32 *from, *to_next_drop;
1653 uword n_left_from, n_left_to_next_drop;
1654 static f64 time_last_seed_change = -1e100;
1655 static u32 hash_seeds[3];
1656 static uword hash_bitmap[256 / BITS (uword)];
1660 if (node->flags & VLIB_NODE_FLAG_TRACE)
1661 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
1663 time_now = vlib_time_now (vm);
1664 if (time_now - time_last_seed_change > 1e-3)
1667 u32 *r = clib_random_buffer_get_data (&vm->random_buffer,
1668 sizeof (hash_seeds));
1669 for (i = 0; i < ARRAY_LEN (hash_seeds); i++)
1670 hash_seeds[i] = r[i];
1672 /* Mark all hash keys as been not-seen before. */
1673 for (i = 0; i < ARRAY_LEN (hash_bitmap); i++)
1676 time_last_seed_change = time_now;
1679 from = vlib_frame_vector_args (frame);
1680 n_left_from = frame->n_vectors;
1682 while (n_left_from > 0)
1684 vlib_get_next_frame (vm, node, IP6_DISCOVER_NEIGHBOR_NEXT_DROP,
1685 to_next_drop, n_left_to_next_drop);
1687 while (n_left_from > 0 && n_left_to_next_drop > 0)
1691 u32 pi0, adj_index0, a0, b0, c0, m0, sw_if_index0, drop0;
1693 ip_adjacency_t *adj0;
1694 vnet_hw_interface_t *hw_if0;
1699 p0 = vlib_get_buffer (vm, pi0);
1701 adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
1703 ip0 = vlib_buffer_get_current (p0);
1705 adj0 = ip_get_adjacency (lm, adj_index0);
1709 ip0->dst_address.as_u64[0] =
1710 adj0->sub_type.nbr.next_hop.ip6.as_u64[0];
1711 ip0->dst_address.as_u64[1] =
1712 adj0->sub_type.nbr.next_hop.ip6.as_u64[1];
1719 sw_if_index0 = adj0->rewrite_header.sw_if_index;
1720 vnet_buffer (p0)->sw_if_index[VLIB_TX] = sw_if_index0;
1723 b0 ^= ip0->dst_address.as_u32[0];
1724 c0 ^= ip0->dst_address.as_u32[1];
1726 hash_v3_mix32 (a0, b0, c0);
1728 b0 ^= ip0->dst_address.as_u32[2];
1729 c0 ^= ip0->dst_address.as_u32[3];
1731 hash_v3_finalize32 (a0, b0, c0);
1733 c0 &= BITS (hash_bitmap) - 1;
1734 c0 = c0 / BITS (uword);
1735 m0 = (uword) 1 << (c0 % BITS (uword));
1737 bm0 = hash_bitmap[c0];
1738 drop0 = (bm0 & m0) != 0;
1740 /* Mark it as seen. */
1741 hash_bitmap[c0] = bm0 | m0;
1745 to_next_drop[0] = pi0;
1747 n_left_to_next_drop -= 1;
1749 hw_if0 = vnet_get_sup_hw_interface (vnm, sw_if_index0);
1751 /* If the interface is link-down, drop the pkt */
1752 if (!(hw_if0->flags & VNET_HW_INTERFACE_FLAG_LINK_UP))
1756 node->errors[drop0 ? IP6_DISCOVER_NEIGHBOR_ERROR_DROP
1757 : IP6_DISCOVER_NEIGHBOR_ERROR_REQUEST_SENT];
1762 * the adj has been updated to a rewrite but the node the DPO that got
1763 * us here hasn't - yet. no big deal. we'll drop while we wait.
1765 if (IP_LOOKUP_NEXT_REWRITE == adj0->lookup_next_index)
1770 icmp6_neighbor_solicitation_header_t *h0;
1773 h0 = vlib_packet_template_get_packet
1774 (vm, &im->discover_neighbor_packet_template, &bi0);
1777 * Build ethernet header.
1778 * Choose source address based on destination lookup
1781 if (ip6_src_address_for_packet (lm,
1783 &h0->ip.src_address))
1785 /* There is no address on the interface */
1787 node->errors[IP6_DISCOVER_NEIGHBOR_ERROR_NO_SOURCE_ADDRESS];
1788 vlib_buffer_free (vm, &bi0, 1);
1793 * Destination address is a solicited node multicast address.
1794 * We need to fill in
1795 * the low 24 bits with low 24 bits of target's address.
1797 h0->ip.dst_address.as_u8[13] = ip0->dst_address.as_u8[13];
1798 h0->ip.dst_address.as_u8[14] = ip0->dst_address.as_u8[14];
1799 h0->ip.dst_address.as_u8[15] = ip0->dst_address.as_u8[15];
1801 h0->neighbor.target_address = ip0->dst_address;
1803 clib_memcpy (h0->link_layer_option.ethernet_address,
1804 hw_if0->hw_address, vec_len (hw_if0->hw_address));
1806 /* $$$$ appears we need this; why is the checksum non-zero? */
1807 h0->neighbor.icmp.checksum = 0;
1808 h0->neighbor.icmp.checksum =
1809 ip6_tcp_udp_icmp_compute_checksum (vm, 0, &h0->ip,
1812 ASSERT (bogus_length == 0);
1814 vlib_buffer_copy_trace_flag (vm, p0, bi0);
1815 b0 = vlib_get_buffer (vm, bi0);
1816 vnet_buffer (b0)->sw_if_index[VLIB_TX]
1817 = vnet_buffer (p0)->sw_if_index[VLIB_TX];
1819 /* Add rewrite/encap string. */
1820 vnet_rewrite_one_header (adj0[0], h0, sizeof (ethernet_header_t));
1821 vlib_buffer_advance (b0, -adj0->rewrite_header.data_bytes);
1823 next0 = IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX;
1825 vlib_set_next_frame_buffer (vm, node, next0, bi0);
1829 vlib_put_next_frame (vm, node, IP6_DISCOVER_NEIGHBOR_NEXT_DROP,
1830 n_left_to_next_drop);
1833 return frame->n_vectors;
1837 ip6_discover_neighbor (vlib_main_t * vm,
1838 vlib_node_runtime_t * node, vlib_frame_t * frame)
1840 return (ip6_discover_neighbor_inline (vm, node, frame, 0));
1844 ip6_glean (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
1846 return (ip6_discover_neighbor_inline (vm, node, frame, 1));
1849 static char *ip6_discover_neighbor_error_strings[] = {
1850 [IP6_DISCOVER_NEIGHBOR_ERROR_DROP] = "address overflow drops",
1851 [IP6_DISCOVER_NEIGHBOR_ERROR_REQUEST_SENT] = "neighbor solicitations sent",
1852 [IP6_DISCOVER_NEIGHBOR_ERROR_NO_SOURCE_ADDRESS]
1853 = "no source address for ND solicitation",
1857 VLIB_REGISTER_NODE (ip6_discover_neighbor_node) =
1859 .function = ip6_discover_neighbor,
1860 .name = "ip6-discover-neighbor",
1861 .vector_size = sizeof (u32),
1862 .format_trace = format_ip6_forward_next_trace,
1863 .n_errors = ARRAY_LEN (ip6_discover_neighbor_error_strings),
1864 .error_strings = ip6_discover_neighbor_error_strings,
1865 .n_next_nodes = IP6_DISCOVER_NEIGHBOR_N_NEXT,
1868 [IP6_DISCOVER_NEIGHBOR_NEXT_DROP] = "error-drop",
1869 [IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX] = "interface-output",
1875 VLIB_REGISTER_NODE (ip6_glean_node) =
1877 .function = ip6_glean,
1878 .name = "ip6-glean",
1879 .vector_size = sizeof (u32),
1880 .format_trace = format_ip6_forward_next_trace,
1881 .n_errors = ARRAY_LEN (ip6_discover_neighbor_error_strings),
1882 .error_strings = ip6_discover_neighbor_error_strings,
1883 .n_next_nodes = IP6_DISCOVER_NEIGHBOR_N_NEXT,
1886 [IP6_DISCOVER_NEIGHBOR_NEXT_DROP] = "error-drop",
1887 [IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX] = "interface-output",
1893 ip6_probe_neighbor (vlib_main_t * vm, ip6_address_t * dst, u32 sw_if_index)
1895 vnet_main_t *vnm = vnet_get_main ();
1896 ip6_main_t *im = &ip6_main;
1897 icmp6_neighbor_solicitation_header_t *h;
1899 ip_interface_address_t *ia;
1900 ip_adjacency_t *adj;
1901 vnet_hw_interface_t *hi;
1902 vnet_sw_interface_t *si;
1907 si = vnet_get_sw_interface (vnm, sw_if_index);
1909 if (!(si->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP))
1911 return clib_error_return (0, "%U: interface %U down",
1912 format_ip6_address, dst,
1913 format_vnet_sw_if_index_name, vnm,
1918 ip6_interface_address_matching_destination (im, dst, sw_if_index, &ia);
1921 vnm->api_errno = VNET_API_ERROR_NO_MATCHING_INTERFACE;
1922 return clib_error_return
1923 (0, "no matching interface address for destination %U (interface %U)",
1924 format_ip6_address, dst,
1925 format_vnet_sw_if_index_name, vnm, sw_if_index);
1929 vlib_packet_template_get_packet (vm,
1930 &im->discover_neighbor_packet_template,
1933 hi = vnet_get_sup_hw_interface (vnm, sw_if_index);
1935 /* Destination address is a solicited node multicast address. We need to fill in
1936 the low 24 bits with low 24 bits of target's address. */
1937 h->ip.dst_address.as_u8[13] = dst->as_u8[13];
1938 h->ip.dst_address.as_u8[14] = dst->as_u8[14];
1939 h->ip.dst_address.as_u8[15] = dst->as_u8[15];
1941 h->ip.src_address = src[0];
1942 h->neighbor.target_address = dst[0];
1944 clib_memcpy (h->link_layer_option.ethernet_address, hi->hw_address,
1945 vec_len (hi->hw_address));
1947 h->neighbor.icmp.checksum =
1948 ip6_tcp_udp_icmp_compute_checksum (vm, 0, &h->ip, &bogus_length);
1949 ASSERT (bogus_length == 0);
1951 b = vlib_get_buffer (vm, bi);
1952 vnet_buffer (b)->sw_if_index[VLIB_RX] =
1953 vnet_buffer (b)->sw_if_index[VLIB_TX] = sw_if_index;
1955 /* Add encapsulation string for software interface (e.g. ethernet header). */
1956 adj = ip_get_adjacency (&im->lookup_main, ia->neighbor_probe_adj_index);
1957 vnet_rewrite_one_header (adj[0], h, sizeof (ethernet_header_t));
1958 vlib_buffer_advance (b, -adj->rewrite_header.data_bytes);
1961 vlib_frame_t *f = vlib_get_frame_to_node (vm, hi->output_node_index);
1962 u32 *to_next = vlib_frame_vector_args (f);
1965 vlib_put_frame_to_node (vm, hi->output_node_index, f);
1968 return /* no error */ 0;
1973 IP6_REWRITE_NEXT_DROP,
1974 IP6_REWRITE_NEXT_ICMP_ERROR,
1975 } ip6_rewrite_next_t;
1978 ip6_rewrite_inline (vlib_main_t * vm,
1979 vlib_node_runtime_t * node,
1980 vlib_frame_t * frame, int is_midchain)
1982 ip_lookup_main_t *lm = &ip6_main.lookup_main;
1983 u32 *from = vlib_frame_vector_args (frame);
1984 u32 n_left_from, n_left_to_next, *to_next, next_index;
1985 vlib_node_runtime_t *error_node =
1986 vlib_node_get_runtime (vm, ip6_input_node.index);
1988 n_left_from = frame->n_vectors;
1989 next_index = node->cached_next_index;
1990 u32 cpu_index = os_get_cpu_number ();
1992 while (n_left_from > 0)
1994 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1996 while (n_left_from >= 4 && n_left_to_next >= 2)
1998 ip_adjacency_t *adj0, *adj1;
1999 vlib_buffer_t *p0, *p1;
2000 ip6_header_t *ip0, *ip1;
2001 u32 pi0, rw_len0, next0, error0, adj_index0;
2002 u32 pi1, rw_len1, next1, error1, adj_index1;
2003 u32 tx_sw_if_index0, tx_sw_if_index1;
2005 /* Prefetch next iteration. */
2007 vlib_buffer_t *p2, *p3;
2009 p2 = vlib_get_buffer (vm, from[2]);
2010 p3 = vlib_get_buffer (vm, from[3]);
2012 vlib_prefetch_buffer_header (p2, LOAD);
2013 vlib_prefetch_buffer_header (p3, LOAD);
2015 CLIB_PREFETCH (p2->pre_data, 32, STORE);
2016 CLIB_PREFETCH (p3->pre_data, 32, STORE);
2018 CLIB_PREFETCH (p2->data, sizeof (ip0[0]), STORE);
2019 CLIB_PREFETCH (p3->data, sizeof (ip0[0]), STORE);
2022 pi0 = to_next[0] = from[0];
2023 pi1 = to_next[1] = from[1];
2028 n_left_to_next -= 2;
2030 p0 = vlib_get_buffer (vm, pi0);
2031 p1 = vlib_get_buffer (vm, pi1);
2033 adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
2034 adj_index1 = vnet_buffer (p1)->ip.adj_index[VLIB_TX];
2036 /* We should never rewrite a pkt using the MISS adjacency */
2037 ASSERT (adj_index0 && adj_index1);
2039 ip0 = vlib_buffer_get_current (p0);
2040 ip1 = vlib_buffer_get_current (p1);
2042 error0 = error1 = IP6_ERROR_NONE;
2043 next0 = next1 = IP6_REWRITE_NEXT_DROP;
2045 if (PREDICT_TRUE (!(p0->flags & VNET_BUFFER_LOCALLY_ORIGINATED)))
2047 i32 hop_limit0 = ip0->hop_limit;
2049 /* Input node should have reject packets with hop limit 0. */
2050 ASSERT (ip0->hop_limit > 0);
2054 ip0->hop_limit = hop_limit0;
2057 * If the hop count drops below 1 when forwarding, generate
2060 if (PREDICT_FALSE (hop_limit0 <= 0))
2062 error0 = IP6_ERROR_TIME_EXPIRED;
2063 next0 = IP6_REWRITE_NEXT_ICMP_ERROR;
2064 vnet_buffer (p0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
2065 icmp6_error_set_vnet_buffer (p0, ICMP6_time_exceeded,
2066 ICMP6_time_exceeded_ttl_exceeded_in_transit,
2072 p0->flags &= ~VNET_BUFFER_LOCALLY_ORIGINATED;
2074 if (PREDICT_TRUE (!(p1->flags & VNET_BUFFER_LOCALLY_ORIGINATED)))
2076 i32 hop_limit1 = ip1->hop_limit;
2078 /* Input node should have reject packets with hop limit 0. */
2079 ASSERT (ip1->hop_limit > 0);
2083 ip1->hop_limit = hop_limit1;
2086 * If the hop count drops below 1 when forwarding, generate
2089 if (PREDICT_FALSE (hop_limit1 <= 0))
2091 error1 = IP6_ERROR_TIME_EXPIRED;
2092 next1 = IP6_REWRITE_NEXT_ICMP_ERROR;
2093 vnet_buffer (p1)->sw_if_index[VLIB_TX] = (u32) ~ 0;
2094 icmp6_error_set_vnet_buffer (p1, ICMP6_time_exceeded,
2095 ICMP6_time_exceeded_ttl_exceeded_in_transit,
2101 p1->flags &= ~VNET_BUFFER_LOCALLY_ORIGINATED;
2103 adj0 = ip_get_adjacency (lm, adj_index0);
2104 adj1 = ip_get_adjacency (lm, adj_index1);
2106 rw_len0 = adj0[0].rewrite_header.data_bytes;
2107 rw_len1 = adj1[0].rewrite_header.data_bytes;
2108 vnet_buffer (p0)->ip.save_rewrite_length = rw_len0;
2109 vnet_buffer (p1)->ip.save_rewrite_length = rw_len1;
2111 vlib_increment_combined_counter
2112 (&adjacency_counters,
2114 adj_index0, 1, vlib_buffer_length_in_chain (vm, p0) + rw_len0);
2115 vlib_increment_combined_counter
2116 (&adjacency_counters,
2117 cpu_index, adj_index1,
2118 1, vlib_buffer_length_in_chain (vm, p1) + rw_len1);
2120 /* Check MTU of outgoing interface. */
2122 (vlib_buffer_length_in_chain (vm, p0) >
2124 rewrite_header.max_l3_packet_bytes ? IP6_ERROR_MTU_EXCEEDED :
2127 (vlib_buffer_length_in_chain (vm, p1) >
2129 rewrite_header.max_l3_packet_bytes ? IP6_ERROR_MTU_EXCEEDED :
2132 /* Don't adjust the buffer for hop count issue; icmp-error node
2133 * wants to see the IP headerr */
2134 if (PREDICT_TRUE (error0 == IP6_ERROR_NONE))
2136 p0->current_data -= rw_len0;
2137 p0->current_length += rw_len0;
2139 tx_sw_if_index0 = adj0[0].rewrite_header.sw_if_index;
2140 vnet_buffer (p0)->sw_if_index[VLIB_TX] = tx_sw_if_index0;
2141 next0 = adj0[0].rewrite_header.next_index;
2143 vnet_feature_arc_start (lm->output_feature_arc_index,
2144 tx_sw_if_index0, &next0, p0);
2146 if (PREDICT_TRUE (error1 == IP6_ERROR_NONE))
2148 p1->current_data -= rw_len1;
2149 p1->current_length += rw_len1;
2151 tx_sw_if_index1 = adj1[0].rewrite_header.sw_if_index;
2152 vnet_buffer (p1)->sw_if_index[VLIB_TX] = tx_sw_if_index1;
2153 next1 = adj1[0].rewrite_header.next_index;
2155 vnet_feature_arc_start (lm->output_feature_arc_index,
2156 tx_sw_if_index1, &next1, p1);
2159 /* Guess we are only writing on simple Ethernet header. */
2160 vnet_rewrite_two_headers (adj0[0], adj1[0],
2161 ip0, ip1, sizeof (ethernet_header_t));
2165 adj0->sub_type.midchain.fixup_func (vm, adj0, p0);
2166 adj1->sub_type.midchain.fixup_func (vm, adj1, p1);
2169 vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
2170 to_next, n_left_to_next,
2171 pi0, pi1, next0, next1);
2174 while (n_left_from > 0 && n_left_to_next > 0)
2176 ip_adjacency_t *adj0;
2180 u32 adj_index0, next0, error0;
2181 u32 tx_sw_if_index0;
2183 pi0 = to_next[0] = from[0];
2185 p0 = vlib_get_buffer (vm, pi0);
2187 adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
2189 /* We should never rewrite a pkt using the MISS adjacency */
2190 ASSERT (adj_index0);
2192 adj0 = ip_get_adjacency (lm, adj_index0);
2194 ip0 = vlib_buffer_get_current (p0);
2196 error0 = IP6_ERROR_NONE;
2197 next0 = IP6_REWRITE_NEXT_DROP;
2199 /* Check hop limit */
2200 if (PREDICT_TRUE (!(p0->flags & VNET_BUFFER_LOCALLY_ORIGINATED)))
2202 i32 hop_limit0 = ip0->hop_limit;
2204 ASSERT (ip0->hop_limit > 0);
2208 ip0->hop_limit = hop_limit0;
2210 if (PREDICT_FALSE (hop_limit0 <= 0))
2213 * If the hop count drops below 1 when forwarding, generate
2216 error0 = IP6_ERROR_TIME_EXPIRED;
2217 next0 = IP6_REWRITE_NEXT_ICMP_ERROR;
2218 vnet_buffer (p0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
2219 icmp6_error_set_vnet_buffer (p0, ICMP6_time_exceeded,
2220 ICMP6_time_exceeded_ttl_exceeded_in_transit,
2226 p0->flags &= ~VNET_BUFFER_LOCALLY_ORIGINATED;
2229 /* Guess we are only writing on simple Ethernet header. */
2230 vnet_rewrite_one_header (adj0[0], ip0, sizeof (ethernet_header_t));
2232 /* Update packet buffer attributes/set output interface. */
2233 rw_len0 = adj0[0].rewrite_header.data_bytes;
2234 vnet_buffer (p0)->ip.save_rewrite_length = rw_len0;
2236 vlib_increment_combined_counter
2237 (&adjacency_counters,
2239 adj_index0, 1, vlib_buffer_length_in_chain (vm, p0) + rw_len0);
2241 /* Check MTU of outgoing interface. */
2243 (vlib_buffer_length_in_chain (vm, p0) >
2245 rewrite_header.max_l3_packet_bytes ? IP6_ERROR_MTU_EXCEEDED :
2248 /* Don't adjust the buffer for hop count issue; icmp-error node
2249 * wants to see the IP headerr */
2250 if (PREDICT_TRUE (error0 == IP6_ERROR_NONE))
2252 p0->current_data -= rw_len0;
2253 p0->current_length += rw_len0;
2255 tx_sw_if_index0 = adj0[0].rewrite_header.sw_if_index;
2257 vnet_buffer (p0)->sw_if_index[VLIB_TX] = tx_sw_if_index0;
2258 next0 = adj0[0].rewrite_header.next_index;
2260 vnet_feature_arc_start (lm->output_feature_arc_index,
2261 tx_sw_if_index0, &next0, p0);
2266 adj0->sub_type.midchain.fixup_func (vm, adj0, p0);
2269 p0->error = error_node->errors[error0];
2274 n_left_to_next -= 1;
2276 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
2277 to_next, n_left_to_next,
2281 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2284 /* Need to do trace after rewrites to pick up new packet data. */
2285 if (node->flags & VLIB_NODE_FLAG_TRACE)
2286 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
2288 return frame->n_vectors;
2292 ip6_rewrite (vlib_main_t * vm,
2293 vlib_node_runtime_t * node, vlib_frame_t * frame)
2295 return ip6_rewrite_inline (vm, node, frame,
2300 ip6_midchain (vlib_main_t * vm,
2301 vlib_node_runtime_t * node, vlib_frame_t * frame)
2303 return ip6_rewrite_inline (vm, node, frame,
2308 VLIB_REGISTER_NODE (ip6_midchain_node) =
2310 .function = ip6_midchain,
2311 .name = "ip6-midchain",
2312 .vector_size = sizeof (u32),
2313 .format_trace = format_ip6_forward_next_trace,
2314 .sibling_of = "ip6-rewrite",
2318 VLIB_NODE_FUNCTION_MULTIARCH (ip6_midchain_node, ip6_midchain);
2321 VLIB_REGISTER_NODE (ip6_rewrite_node) =
2323 .function = ip6_rewrite,
2324 .name = "ip6-rewrite",
2325 .vector_size = sizeof (u32),
2326 .format_trace = format_ip6_rewrite_trace,
2330 [IP6_REWRITE_NEXT_DROP] = "error-drop",
2331 [IP6_REWRITE_NEXT_ICMP_ERROR] = "ip6-icmp-error",
2336 VLIB_NODE_FUNCTION_MULTIARCH (ip6_rewrite_node, ip6_rewrite);
2339 * Hop-by-Hop handling
2342 ip6_hop_by_hop_main_t ip6_hop_by_hop_main;
2344 #define foreach_ip6_hop_by_hop_error \
2345 _(PROCESSED, "pkts with ip6 hop-by-hop options") \
2346 _(FORMAT, "incorrectly formatted hop-by-hop options") \
2347 _(UNKNOWN_OPTION, "unknown ip6 hop-by-hop options")
2351 #define _(sym,str) IP6_HOP_BY_HOP_ERROR_##sym,
2352 foreach_ip6_hop_by_hop_error
2354 IP6_HOP_BY_HOP_N_ERROR,
2355 } ip6_hop_by_hop_error_t;
2358 * Primary h-b-h handler trace support
2359 * We work pretty hard on the problem for obvious reasons
2365 u8 option_data[256];
2366 } ip6_hop_by_hop_trace_t;
2368 vlib_node_registration_t ip6_hop_by_hop_node;
2370 static char *ip6_hop_by_hop_error_strings[] = {
2371 #define _(sym,string) string,
2372 foreach_ip6_hop_by_hop_error
2377 format_ip6_hop_by_hop_trace (u8 * s, va_list * args)
2379 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
2380 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
2381 ip6_hop_by_hop_trace_t *t = va_arg (*args, ip6_hop_by_hop_trace_t *);
2382 ip6_hop_by_hop_header_t *hbh0;
2383 ip6_hop_by_hop_option_t *opt0, *limit0;
2384 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2388 hbh0 = (ip6_hop_by_hop_header_t *) t->option_data;
2390 s = format (s, "IP6_HOP_BY_HOP: next index %d len %d traced %d",
2391 t->next_index, (hbh0->length + 1) << 3, t->trace_len);
2393 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2394 limit0 = (ip6_hop_by_hop_option_t *) ((u8 *) hbh0) + t->trace_len;
2396 while (opt0 < limit0)
2401 case 0: /* Pad, just stop */
2402 opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0) + 1;
2406 if (hm->trace[type0])
2408 s = (*hm->trace[type0]) (s, opt0);
2413 format (s, "\n unrecognized option %d length %d", type0,
2417 (ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length +
2418 sizeof (ip6_hop_by_hop_option_t));
2426 ip6_scan_hbh_options (vlib_buffer_t * b0,
2428 ip6_hop_by_hop_header_t * hbh0,
2429 ip6_hop_by_hop_option_t * opt0,
2430 ip6_hop_by_hop_option_t * limit0, u32 * next0)
2432 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2436 while (opt0 < limit0)
2442 opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0) + 1;
2447 if (hm->options[type0])
2449 if ((*hm->options[type0]) (b0, ip0, opt0) < 0)
2451 error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2457 /* Unrecognized mandatory option, check the two high order bits */
2458 switch (opt0->type & HBH_OPTION_TYPE_HIGH_ORDER_BITS)
2460 case HBH_OPTION_TYPE_SKIP_UNKNOWN:
2462 case HBH_OPTION_TYPE_DISCARD_UNKNOWN:
2463 error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2464 *next0 = IP_LOOKUP_NEXT_DROP;
2466 case HBH_OPTION_TYPE_DISCARD_UNKNOWN_ICMP:
2467 error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2468 *next0 = IP_LOOKUP_NEXT_ICMP_ERROR;
2469 icmp6_error_set_vnet_buffer (b0, ICMP6_parameter_problem,
2470 ICMP6_parameter_problem_unrecognized_option,
2471 (u8 *) opt0 - (u8 *) ip0);
2473 case HBH_OPTION_TYPE_DISCARD_UNKNOWN_ICMP_NOT_MCAST:
2474 error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2475 if (!ip6_address_is_multicast (&ip0->dst_address))
2477 *next0 = IP_LOOKUP_NEXT_ICMP_ERROR;
2478 icmp6_error_set_vnet_buffer (b0,
2479 ICMP6_parameter_problem,
2480 ICMP6_parameter_problem_unrecognized_option,
2481 (u8 *) opt0 - (u8 *) ip0);
2485 *next0 = IP_LOOKUP_NEXT_DROP;
2493 (ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length +
2494 sizeof (ip6_hop_by_hop_option_t));
2500 * Process the Hop-by-Hop Options header
2503 ip6_hop_by_hop (vlib_main_t * vm,
2504 vlib_node_runtime_t * node, vlib_frame_t * frame)
2506 vlib_node_runtime_t *error_node =
2507 vlib_node_get_runtime (vm, ip6_hop_by_hop_node.index);
2508 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2509 u32 n_left_from, *from, *to_next;
2510 ip_lookup_next_t next_index;
2511 ip6_main_t *im = &ip6_main;
2512 ip_lookup_main_t *lm = &im->lookup_main;
2514 from = vlib_frame_vector_args (frame);
2515 n_left_from = frame->n_vectors;
2516 next_index = node->cached_next_index;
2518 while (n_left_from > 0)
2522 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
2524 while (n_left_from >= 4 && n_left_to_next >= 2)
2527 vlib_buffer_t *b0, *b1;
2529 ip6_header_t *ip0, *ip1;
2530 ip6_hop_by_hop_header_t *hbh0, *hbh1;
2531 ip6_hop_by_hop_option_t *opt0, *limit0, *opt1, *limit1;
2532 u8 error0 = 0, error1 = 0;
2534 /* Prefetch next iteration. */
2536 vlib_buffer_t *p2, *p3;
2538 p2 = vlib_get_buffer (vm, from[2]);
2539 p3 = vlib_get_buffer (vm, from[3]);
2541 vlib_prefetch_buffer_header (p2, LOAD);
2542 vlib_prefetch_buffer_header (p3, LOAD);
2544 CLIB_PREFETCH (p2->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
2545 CLIB_PREFETCH (p3->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
2548 /* Speculatively enqueue b0, b1 to the current next frame */
2549 to_next[0] = bi0 = from[0];
2550 to_next[1] = bi1 = from[1];
2554 n_left_to_next -= 2;
2556 b0 = vlib_get_buffer (vm, bi0);
2557 b1 = vlib_get_buffer (vm, bi1);
2559 /* Default use the next_index from the adjacency. A HBH option rarely redirects to a different node */
2560 u32 adj_index0 = vnet_buffer (b0)->ip.adj_index[VLIB_TX];
2561 ip_adjacency_t *adj0 = ip_get_adjacency (lm, adj_index0);
2562 u32 adj_index1 = vnet_buffer (b1)->ip.adj_index[VLIB_TX];
2563 ip_adjacency_t *adj1 = ip_get_adjacency (lm, adj_index1);
2565 /* Default use the next_index from the adjacency. A HBH option rarely redirects to a different node */
2566 next0 = adj0->lookup_next_index;
2567 next1 = adj1->lookup_next_index;
2569 ip0 = vlib_buffer_get_current (b0);
2570 ip1 = vlib_buffer_get_current (b1);
2571 hbh0 = (ip6_hop_by_hop_header_t *) (ip0 + 1);
2572 hbh1 = (ip6_hop_by_hop_header_t *) (ip1 + 1);
2573 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2574 opt1 = (ip6_hop_by_hop_option_t *) (hbh1 + 1);
2576 (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 +
2577 ((hbh0->length + 1) << 3));
2579 (ip6_hop_by_hop_option_t *) ((u8 *) hbh1 +
2580 ((hbh1->length + 1) << 3));
2583 * Basic validity checks
2585 if ((hbh0->length + 1) << 3 >
2586 clib_net_to_host_u16 (ip0->payload_length))
2588 error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2589 next0 = IP_LOOKUP_NEXT_DROP;
2592 /* Scan the set of h-b-h options, process ones that we understand */
2593 error0 = ip6_scan_hbh_options (b0, ip0, hbh0, opt0, limit0, &next0);
2595 if ((hbh1->length + 1) << 3 >
2596 clib_net_to_host_u16 (ip1->payload_length))
2598 error1 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2599 next1 = IP_LOOKUP_NEXT_DROP;
2602 /* Scan the set of h-b-h options, process ones that we understand */
2603 error1 = ip6_scan_hbh_options (b1, ip1, hbh1, opt1, limit1, &next1);
2606 /* Has the classifier flagged this buffer for special treatment? */
2609 && (vnet_buffer (b0)->l2_classify.opaque_index & OI_DECAP)))
2610 next0 = hm->next_override;
2612 /* Has the classifier flagged this buffer for special treatment? */
2615 && (vnet_buffer (b1)->l2_classify.opaque_index & OI_DECAP)))
2616 next1 = hm->next_override;
2618 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)))
2620 if (b0->flags & VLIB_BUFFER_IS_TRACED)
2622 ip6_hop_by_hop_trace_t *t =
2623 vlib_add_trace (vm, node, b0, sizeof (*t));
2624 u32 trace_len = (hbh0->length + 1) << 3;
2625 t->next_index = next0;
2626 /* Capture the h-b-h option verbatim */
2629 ARRAY_LEN (t->option_data) ? trace_len :
2630 ARRAY_LEN (t->option_data);
2631 t->trace_len = trace_len;
2632 clib_memcpy (t->option_data, hbh0, trace_len);
2634 if (b1->flags & VLIB_BUFFER_IS_TRACED)
2636 ip6_hop_by_hop_trace_t *t =
2637 vlib_add_trace (vm, node, b1, sizeof (*t));
2638 u32 trace_len = (hbh1->length + 1) << 3;
2639 t->next_index = next1;
2640 /* Capture the h-b-h option verbatim */
2643 ARRAY_LEN (t->option_data) ? trace_len :
2644 ARRAY_LEN (t->option_data);
2645 t->trace_len = trace_len;
2646 clib_memcpy (t->option_data, hbh1, trace_len);
2651 b0->error = error_node->errors[error0];
2652 b1->error = error_node->errors[error1];
2654 /* verify speculative enqueue, maybe switch current next frame */
2655 vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
2656 n_left_to_next, bi0, bi1, next0,
2660 while (n_left_from > 0 && n_left_to_next > 0)
2666 ip6_hop_by_hop_header_t *hbh0;
2667 ip6_hop_by_hop_option_t *opt0, *limit0;
2670 /* Speculatively enqueue b0 to the current next frame */
2676 n_left_to_next -= 1;
2678 b0 = vlib_get_buffer (vm, bi0);
2680 * Default use the next_index from the adjacency.
2681 * A HBH option rarely redirects to a different node
2683 u32 adj_index0 = vnet_buffer (b0)->ip.adj_index[VLIB_TX];
2684 ip_adjacency_t *adj0 = ip_get_adjacency (lm, adj_index0);
2685 next0 = adj0->lookup_next_index;
2687 ip0 = vlib_buffer_get_current (b0);
2688 hbh0 = (ip6_hop_by_hop_header_t *) (ip0 + 1);
2689 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2691 (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 +
2692 ((hbh0->length + 1) << 3));
2695 * Basic validity checks
2697 if ((hbh0->length + 1) << 3 >
2698 clib_net_to_host_u16 (ip0->payload_length))
2700 error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2701 next0 = IP_LOOKUP_NEXT_DROP;
2705 /* Scan the set of h-b-h options, process ones that we understand */
2706 error0 = ip6_scan_hbh_options (b0, ip0, hbh0, opt0, limit0, &next0);
2709 /* Has the classifier flagged this buffer for special treatment? */
2712 && (vnet_buffer (b0)->l2_classify.opaque_index & OI_DECAP)))
2713 next0 = hm->next_override;
2715 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
2717 ip6_hop_by_hop_trace_t *t =
2718 vlib_add_trace (vm, node, b0, sizeof (*t));
2719 u32 trace_len = (hbh0->length + 1) << 3;
2720 t->next_index = next0;
2721 /* Capture the h-b-h option verbatim */
2724 ARRAY_LEN (t->option_data) ? trace_len :
2725 ARRAY_LEN (t->option_data);
2726 t->trace_len = trace_len;
2727 clib_memcpy (t->option_data, hbh0, trace_len);
2730 b0->error = error_node->errors[error0];
2732 /* verify speculative enqueue, maybe switch current next frame */
2733 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
2734 n_left_to_next, bi0, next0);
2736 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2738 return frame->n_vectors;
2742 VLIB_REGISTER_NODE (ip6_hop_by_hop_node) =
2744 .function = ip6_hop_by_hop,
2745 .name = "ip6-hop-by-hop",
2746 .sibling_of = "ip6-lookup",
2747 .vector_size = sizeof (u32),
2748 .format_trace = format_ip6_hop_by_hop_trace,
2749 .type = VLIB_NODE_TYPE_INTERNAL,
2750 .n_errors = ARRAY_LEN (ip6_hop_by_hop_error_strings),
2751 .error_strings = ip6_hop_by_hop_error_strings,
2756 VLIB_NODE_FUNCTION_MULTIARCH (ip6_hop_by_hop_node, ip6_hop_by_hop);
2758 static clib_error_t *
2759 ip6_hop_by_hop_init (vlib_main_t * vm)
2761 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2762 memset (hm->options, 0, sizeof (hm->options));
2763 memset (hm->trace, 0, sizeof (hm->trace));
2764 hm->next_override = IP6_LOOKUP_NEXT_POP_HOP_BY_HOP;
2768 VLIB_INIT_FUNCTION (ip6_hop_by_hop_init);
2771 ip6_hbh_set_next_override (uword next)
2773 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2775 hm->next_override = next;
2779 ip6_hbh_register_option (u8 option,
2780 int options (vlib_buffer_t * b, ip6_header_t * ip,
2781 ip6_hop_by_hop_option_t * opt),
2782 u8 * trace (u8 * s, ip6_hop_by_hop_option_t * opt))
2784 ip6_main_t *im = &ip6_main;
2785 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2787 ASSERT (option < ARRAY_LEN (hm->options));
2789 /* Already registered */
2790 if (hm->options[option])
2793 hm->options[option] = options;
2794 hm->trace[option] = trace;
2796 /* Set global variable */
2797 im->hbh_enabled = 1;
2803 ip6_hbh_unregister_option (u8 option)
2805 ip6_main_t *im = &ip6_main;
2806 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2808 ASSERT (option < ARRAY_LEN (hm->options));
2810 /* Not registered */
2811 if (!hm->options[option])
2814 hm->options[option] = NULL;
2815 hm->trace[option] = NULL;
2817 /* Disable global knob if this was the last option configured */
2820 for (i = 0; i < 256; i++)
2822 if (hm->options[option])
2829 im->hbh_enabled = 0;
2834 /* Global IP6 main. */
2835 ip6_main_t ip6_main;
2837 static clib_error_t *
2838 ip6_lookup_init (vlib_main_t * vm)
2840 ip6_main_t *im = &ip6_main;
2841 clib_error_t *error;
2844 if ((error = vlib_call_init_function (vm, vnet_feature_init)))
2847 for (i = 0; i < ARRAY_LEN (im->fib_masks); i++)
2854 for (j = 0; j < i0; j++)
2855 im->fib_masks[i].as_u32[j] = ~0;
2858 im->fib_masks[i].as_u32[i0] =
2859 clib_host_to_net_u32 (pow2_mask (i1) << (32 - i1));
2862 ip_lookup_init (&im->lookup_main, /* is_ip6 */ 1);
2864 if (im->lookup_table_nbuckets == 0)
2865 im->lookup_table_nbuckets = IP6_FIB_DEFAULT_HASH_NUM_BUCKETS;
2867 im->lookup_table_nbuckets = 1 << max_log2 (im->lookup_table_nbuckets);
2869 if (im->lookup_table_size == 0)
2870 im->lookup_table_size = IP6_FIB_DEFAULT_HASH_MEMORY_SIZE;
2872 BV (clib_bihash_init) (&(im->ip6_table[IP6_FIB_TABLE_FWDING].ip6_hash),
2873 "ip6 FIB fwding table",
2874 im->lookup_table_nbuckets, im->lookup_table_size);
2875 BV (clib_bihash_init) (&im->ip6_table[IP6_FIB_TABLE_NON_FWDING].ip6_hash,
2876 "ip6 FIB non-fwding table",
2877 im->lookup_table_nbuckets, im->lookup_table_size);
2879 /* Create FIB with index 0 and table id of 0. */
2880 fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6, 0);
2884 pn = pg_get_node (ip6_lookup_node.index);
2885 pn->unformat_edit = unformat_pg_ip6_header;
2888 /* Unless explicitly configured, don't process HBH options */
2889 im->hbh_enabled = 0;
2892 icmp6_neighbor_solicitation_header_t p;
2894 memset (&p, 0, sizeof (p));
2896 p.ip.ip_version_traffic_class_and_flow_label =
2897 clib_host_to_net_u32 (0x6 << 28);
2898 p.ip.payload_length =
2899 clib_host_to_net_u16 (sizeof (p) -
2901 (icmp6_neighbor_solicitation_header_t, neighbor));
2902 p.ip.protocol = IP_PROTOCOL_ICMP6;
2903 p.ip.hop_limit = 255;
2904 ip6_set_solicited_node_multicast_address (&p.ip.dst_address, 0);
2906 p.neighbor.icmp.type = ICMP6_neighbor_solicitation;
2908 p.link_layer_option.header.type =
2909 ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address;
2910 p.link_layer_option.header.n_data_u64s =
2911 sizeof (p.link_layer_option) / sizeof (u64);
2913 vlib_packet_template_init (vm,
2914 &im->discover_neighbor_packet_template,
2916 /* alloc chunk size */ 8,
2917 "ip6 neighbor discovery");
2923 VLIB_INIT_FUNCTION (ip6_lookup_init);
2925 static clib_error_t *
2926 add_del_ip6_interface_table (vlib_main_t * vm,
2927 unformat_input_t * input,
2928 vlib_cli_command_t * cmd)
2930 vnet_main_t *vnm = vnet_get_main ();
2931 clib_error_t *error = 0;
2932 u32 sw_if_index, table_id;
2936 if (!unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
2938 error = clib_error_return (0, "unknown interface `%U'",
2939 format_unformat_error, input);
2943 if (unformat (input, "%d", &table_id))
2947 error = clib_error_return (0, "expected table id `%U'",
2948 format_unformat_error, input);
2953 u32 fib_index = fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6,
2956 vec_validate (ip6_main.fib_index_by_sw_if_index, sw_if_index);
2957 ip6_main.fib_index_by_sw_if_index[sw_if_index] = fib_index;
2966 * Place the indicated interface into the supplied IPv6 FIB table (also known
2967 * as a VRF). If the FIB table does not exist, this command creates it. To
2968 * display the current IPv6 FIB table, use the command '<em>show ip6 fib</em>'.
2969 * FIB table will only be displayed if a route has been added to the table, or
2970 * an IP Address is assigned to an interface in the table (which adds a route
2973 * @note IP addresses added after setting the interface IP table end up in
2974 * the indicated FIB table. If the IP address is added prior to adding the
2975 * interface to the FIB table, it will NOT be part of the FIB table. Predictable
2976 * but potentially counter-intuitive results occur if you provision interface
2977 * addresses in multiple FIBs. Upon RX, packets will be processed in the last
2978 * IP table ID provisioned. It might be marginally useful to evade source RPF
2979 * drops to put an interface address into multiple FIBs.
2982 * Example of how to add an interface to an IPv6 FIB table (where 2 is the table-id):
2983 * @cliexcmd{set interface ip6 table GigabitEthernet2/0/0 2}
2986 VLIB_CLI_COMMAND (set_interface_ip6_table_command, static) =
2988 .path = "set interface ip6 table",
2989 .function = add_del_ip6_interface_table,
2990 .short_help = "set interface ip6 table <interface> <table-id>"
2995 ip6_link_local_address_from_ethernet_mac_address (ip6_address_t * ip,
2998 ip->as_u64[0] = clib_host_to_net_u64 (0xFE80000000000000ULL);
2999 /* Invert the "u" bit */
3000 ip->as_u8[8] = mac[0] ^ (1 << 1);
3001 ip->as_u8[9] = mac[1];
3002 ip->as_u8[10] = mac[2];
3003 ip->as_u8[11] = 0xFF;
3004 ip->as_u8[12] = 0xFE;
3005 ip->as_u8[13] = mac[3];
3006 ip->as_u8[14] = mac[4];
3007 ip->as_u8[15] = mac[5];
3011 ip6_ethernet_mac_address_from_link_local_address (u8 * mac,
3014 /* Invert the previously inverted "u" bit */
3015 mac[0] = ip->as_u8[8] ^ (1 << 1);
3016 mac[1] = ip->as_u8[9];
3017 mac[2] = ip->as_u8[10];
3018 mac[3] = ip->as_u8[13];
3019 mac[4] = ip->as_u8[14];
3020 mac[5] = ip->as_u8[15];
3023 static clib_error_t *
3024 test_ip6_link_command_fn (vlib_main_t * vm,
3025 unformat_input_t * input, vlib_cli_command_t * cmd)
3028 ip6_address_t _a, *a = &_a;
3030 if (unformat (input, "%U", unformat_ethernet_address, mac))
3032 ip6_link_local_address_from_ethernet_mac_address (a, mac);
3033 vlib_cli_output (vm, "Link local address: %U", format_ip6_address, a);
3034 ip6_ethernet_mac_address_from_link_local_address (mac, a);
3035 vlib_cli_output (vm, "Original MAC address: %U",
3036 format_ethernet_address, mac);
3043 * This command converts the given MAC Address into an IPv6 link-local
3047 * Example of how to create an IPv6 link-local address:
3048 * @cliexstart{test ip6 link 16:d9:e0:91:79:86}
3049 * Link local address: fe80::14d9:e0ff:fe91:7986
3050 * Original MAC address: 16:d9:e0:91:79:86
3054 VLIB_CLI_COMMAND (test_link_command, static) =
3056 .path = "test ip6 link",
3057 .function = test_ip6_link_command_fn,
3058 .short_help = "test ip6 link <mac-address>",
3063 vnet_set_ip6_flow_hash (u32 table_id, u32 flow_hash_config)
3065 ip6_main_t *im6 = &ip6_main;
3067 uword *p = hash_get (im6->fib_index_by_table_id, table_id);
3072 fib = ip6_fib_get (p[0]);
3074 fib->flow_hash_config = flow_hash_config;
3078 static clib_error_t *
3079 set_ip6_flow_hash_command_fn (vlib_main_t * vm,
3080 unformat_input_t * input,
3081 vlib_cli_command_t * cmd)
3085 u32 flow_hash_config = 0;
3088 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
3090 if (unformat (input, "table %d", &table_id))
3093 else if (unformat (input, #a)) { flow_hash_config |= v; matched=1;}
3094 foreach_flow_hash_bit
3101 return clib_error_return (0, "unknown input `%U'",
3102 format_unformat_error, input);
3104 rv = vnet_set_ip6_flow_hash (table_id, flow_hash_config);
3111 return clib_error_return (0, "no such FIB table %d", table_id);
3114 clib_warning ("BUG: illegal flow hash config 0x%x", flow_hash_config);
3122 * Configure the set of IPv6 fields used by the flow hash.
3126 * Example of how to set the flow hash on a given table:
3127 * @cliexcmd{set ip6 flow-hash table 8 dst sport dport proto}
3129 * Example of display the configured flow hash:
3130 * @cliexstart{show ip6 fib}
3131 * ipv6-VRF:0, fib_index 0, flow hash: src dst sport dport proto
3134 * [@0]: dpo-load-balance: [index:5 buckets:1 uRPF:5 to:[0:0]]
3135 * [0] [@0]: dpo-drop ip6
3138 * [@0]: dpo-load-balance: [index:10 buckets:1 uRPF:10 to:[0:0]]
3139 * [0] [@2]: dpo-receive
3142 * [@0]: dpo-load-balance: [index:8 buckets:1 uRPF:8 to:[0:0]]
3143 * [0] [@2]: dpo-receive
3146 * [@0]: dpo-load-balance: [index:7 buckets:1 uRPF:7 to:[0:0]]
3147 * [0] [@2]: dpo-receive
3150 * [@0]: dpo-load-balance: [index:9 buckets:1 uRPF:9 to:[0:0]]
3151 * [0] [@2]: dpo-receive
3152 * ff02::1:ff00:0/104
3154 * [@0]: dpo-load-balance: [index:6 buckets:1 uRPF:6 to:[0:0]]
3155 * [0] [@2]: dpo-receive
3156 * ipv6-VRF:8, fib_index 1, flow hash: dst sport dport proto
3159 * [@0]: dpo-load-balance: [index:21 buckets:1 uRPF:20 to:[0:0]]
3160 * [0] [@0]: dpo-drop ip6
3163 * [@0]: dpo-load-balance: [index:27 buckets:1 uRPF:26 to:[0:0]]
3164 * [0] [@4]: ipv6-glean: af_packet0
3167 * [@0]: dpo-load-balance: [index:28 buckets:1 uRPF:27 to:[0:0]]
3168 * [0] [@2]: dpo-receive: @::a:1:1:0:7 on af_packet0
3171 * [@0]: dpo-load-balance: [index:26 buckets:1 uRPF:25 to:[0:0]]
3172 * [0] [@2]: dpo-receive
3173 * fe80::fe:3eff:fe3e:9222/128
3175 * [@0]: dpo-load-balance: [index:29 buckets:1 uRPF:28 to:[0:0]]
3176 * [0] [@2]: dpo-receive: fe80::fe:3eff:fe3e:9222 on af_packet0
3179 * [@0]: dpo-load-balance: [index:24 buckets:1 uRPF:23 to:[0:0]]
3180 * [0] [@2]: dpo-receive
3183 * [@0]: dpo-load-balance: [index:23 buckets:1 uRPF:22 to:[0:0]]
3184 * [0] [@2]: dpo-receive
3187 * [@0]: dpo-load-balance: [index:25 buckets:1 uRPF:24 to:[0:0]]
3188 * [0] [@2]: dpo-receive
3189 * ff02::1:ff00:0/104
3191 * [@0]: dpo-load-balance: [index:22 buckets:1 uRPF:21 to:[0:0]]
3192 * [0] [@2]: dpo-receive
3197 VLIB_CLI_COMMAND (set_ip6_flow_hash_command, static) =
3199 .path = "set ip6 flow-hash",
3201 "set ip6 flow-hash table <table-id> [src] [dst] [sport] [dport] [proto] [reverse]",
3202 .function = set_ip6_flow_hash_command_fn,
3206 static clib_error_t *
3207 show_ip6_local_command_fn (vlib_main_t * vm,
3208 unformat_input_t * input, vlib_cli_command_t * cmd)
3210 ip6_main_t *im = &ip6_main;
3211 ip_lookup_main_t *lm = &im->lookup_main;
3214 vlib_cli_output (vm, "Protocols handled by ip6_local");
3215 for (i = 0; i < ARRAY_LEN (lm->local_next_by_ip_protocol); i++)
3217 if (lm->local_next_by_ip_protocol[i] != IP_LOCAL_NEXT_PUNT)
3218 vlib_cli_output (vm, "%d", i);
3226 * Display the set of protocols handled by the local IPv6 stack.
3229 * Example of how to display local protocol table:
3230 * @cliexstart{show ip6 local}
3231 * Protocols handled by ip6_local
3239 VLIB_CLI_COMMAND (show_ip6_local, static) =
3241 .path = "show ip6 local",
3242 .function = show_ip6_local_command_fn,
3243 .short_help = "show ip6 local",
3248 vnet_set_ip6_classify_intfc (vlib_main_t * vm, u32 sw_if_index,
3251 vnet_main_t *vnm = vnet_get_main ();
3252 vnet_interface_main_t *im = &vnm->interface_main;
3253 ip6_main_t *ipm = &ip6_main;
3254 ip_lookup_main_t *lm = &ipm->lookup_main;
3255 vnet_classify_main_t *cm = &vnet_classify_main;
3256 ip6_address_t *if_addr;
3258 if (pool_is_free_index (im->sw_interfaces, sw_if_index))
3259 return VNET_API_ERROR_NO_MATCHING_INTERFACE;
3261 if (table_index != ~0 && pool_is_free_index (cm->tables, table_index))
3262 return VNET_API_ERROR_NO_SUCH_ENTRY;
3264 vec_validate (lm->classify_table_index_by_sw_if_index, sw_if_index);
3265 lm->classify_table_index_by_sw_if_index[sw_if_index] = table_index;
3267 if_addr = ip6_interface_first_address (ipm, sw_if_index, NULL);
3269 if (NULL != if_addr)
3271 fib_prefix_t pfx = {
3273 .fp_proto = FIB_PROTOCOL_IP6,
3274 .fp_addr.ip6 = *if_addr,
3278 fib_index = fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4,
3282 if (table_index != (u32) ~ 0)
3284 dpo_id_t dpo = DPO_INVALID;
3289 classify_dpo_create (DPO_PROTO_IP6, table_index));
3291 fib_table_entry_special_dpo_add (fib_index,
3293 FIB_SOURCE_CLASSIFY,
3294 FIB_ENTRY_FLAG_NONE, &dpo);
3299 fib_table_entry_special_remove (fib_index,
3300 &pfx, FIB_SOURCE_CLASSIFY);
3307 static clib_error_t *
3308 set_ip6_classify_command_fn (vlib_main_t * vm,
3309 unformat_input_t * input,
3310 vlib_cli_command_t * cmd)
3312 u32 table_index = ~0;
3313 int table_index_set = 0;
3314 u32 sw_if_index = ~0;
3317 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
3319 if (unformat (input, "table-index %d", &table_index))
3320 table_index_set = 1;
3321 else if (unformat (input, "intfc %U", unformat_vnet_sw_interface,
3322 vnet_get_main (), &sw_if_index))
3328 if (table_index_set == 0)
3329 return clib_error_return (0, "classify table-index must be specified");
3331 if (sw_if_index == ~0)
3332 return clib_error_return (0, "interface / subif must be specified");
3334 rv = vnet_set_ip6_classify_intfc (vm, sw_if_index, table_index);
3341 case VNET_API_ERROR_NO_MATCHING_INTERFACE:
3342 return clib_error_return (0, "No such interface");
3344 case VNET_API_ERROR_NO_SUCH_ENTRY:
3345 return clib_error_return (0, "No such classifier table");
3351 * Assign a classification table to an interface. The classification
3352 * table is created using the '<em>classify table</em>' and '<em>classify session</em>'
3353 * commands. Once the table is create, use this command to filter packets
3357 * Example of how to assign a classification table to an interface:
3358 * @cliexcmd{set ip6 classify intfc GigabitEthernet2/0/0 table-index 1}
3361 VLIB_CLI_COMMAND (set_ip6_classify_command, static) =
3363 .path = "set ip6 classify",
3365 "set ip6 classify intfc <interface> table-index <classify-idx>",
3366 .function = set_ip6_classify_command_fn,
3370 static clib_error_t *
3371 ip6_config (vlib_main_t * vm, unformat_input_t * input)
3373 ip6_main_t *im = &ip6_main;
3378 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
3380 if (unformat (input, "hash-buckets %d", &tmp))
3382 else if (unformat (input, "heap-size %dm", &tmp))
3383 heapsize = ((u64) tmp) << 20;
3384 else if (unformat (input, "heap-size %dM", &tmp))
3385 heapsize = ((u64) tmp) << 20;
3386 else if (unformat (input, "heap-size %dg", &tmp))
3387 heapsize = ((u64) tmp) << 30;
3388 else if (unformat (input, "heap-size %dG", &tmp))
3389 heapsize = ((u64) tmp) << 30;
3391 return clib_error_return (0, "unknown input '%U'",
3392 format_unformat_error, input);
3395 im->lookup_table_nbuckets = nbuckets;
3396 im->lookup_table_size = heapsize;
3401 VLIB_EARLY_CONFIG_FUNCTION (ip6_config, "ip6");
3404 * fd.io coding-style-patch-verification: ON
3407 * eval: (c-set-style "gnu")