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 type0 = lm->builtin_protocol_by_ip_protocol[ip0->protocol];
1367 type1 = lm->builtin_protocol_by_ip_protocol[ip1->protocol];
1369 next0 = lm->local_next_by_ip_protocol[ip0->protocol];
1370 next1 = lm->local_next_by_ip_protocol[ip1->protocol];
1375 good_l4_checksum0 = (flags0 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0;
1376 good_l4_checksum1 = (flags1 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0;
1380 /* Skip HBH local processing */
1382 (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
1384 ip6_hop_by_hop_ext_t *ext_hdr =
1385 (ip6_hop_by_hop_ext_t *) ip6_next_header (ip0);
1386 next0 = lm->local_next_by_ip_protocol[ext_hdr->next_hdr];
1387 type0 = lm->builtin_protocol_by_ip_protocol[ext_hdr->next_hdr];
1390 (ip1->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
1392 ip6_hop_by_hop_ext_t *ext_hdr =
1393 (ip6_hop_by_hop_ext_t *) ip6_next_header (ip1);
1394 next1 = lm->local_next_by_ip_protocol[ext_hdr->next_hdr];
1395 type1 = lm->builtin_protocol_by_ip_protocol[ext_hdr->next_hdr];
1397 if (PREDICT_TRUE (IP_PROTOCOL_UDP == ip6_locate_header (p0, ip0,
1401 udp0 = (udp_header_t *) ((u8 *) ip0 + udp_offset0);
1402 /* Don't verify UDP checksum for packets with explicit zero checksum. */
1403 good_l4_checksum0 |= type0 == IP_BUILTIN_PROTOCOL_UDP
1404 && udp0->checksum == 0;
1405 /* Verify UDP length. */
1406 ip_len0 = clib_net_to_host_u16 (ip0->payload_length);
1407 udp_len0 = clib_net_to_host_u16 (udp0->length);
1408 len_diff0 = ip_len0 - udp_len0;
1410 if (PREDICT_TRUE (IP_PROTOCOL_UDP == ip6_locate_header (p1, ip1,
1414 udp1 = (udp_header_t *) ((u8 *) ip1 + udp_offset1);
1415 /* Don't verify UDP checksum for packets with explicit zero checksum. */
1416 good_l4_checksum1 |= type1 == IP_BUILTIN_PROTOCOL_UDP
1417 && udp1->checksum == 0;
1418 /* Verify UDP length. */
1419 ip_len1 = clib_net_to_host_u16 (ip1->payload_length);
1420 udp_len1 = clib_net_to_host_u16 (udp1->length);
1421 len_diff1 = ip_len1 - udp_len1;
1424 good_l4_checksum0 |= type0 == IP_BUILTIN_PROTOCOL_UNKNOWN;
1425 good_l4_checksum1 |= type1 == IP_BUILTIN_PROTOCOL_UNKNOWN;
1427 len_diff0 = type0 == IP_BUILTIN_PROTOCOL_UDP ? len_diff0 : 0;
1428 len_diff1 = type1 == IP_BUILTIN_PROTOCOL_UDP ? len_diff1 : 0;
1430 if (PREDICT_FALSE (type0 != IP_BUILTIN_PROTOCOL_UNKNOWN
1431 && !good_l4_checksum0
1432 && !(flags0 & IP_BUFFER_L4_CHECKSUM_COMPUTED)))
1434 flags0 = ip6_tcp_udp_icmp_validate_checksum (vm, p0);
1436 (flags0 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0;
1438 if (PREDICT_FALSE (type1 != IP_BUILTIN_PROTOCOL_UNKNOWN
1439 && !good_l4_checksum1
1440 && !(flags1 & IP_BUFFER_L4_CHECKSUM_COMPUTED)))
1442 flags1 = ip6_tcp_udp_icmp_validate_checksum (vm, p1);
1444 (flags1 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0;
1447 error0 = error1 = IP6_ERROR_UNKNOWN_PROTOCOL;
1449 error0 = len_diff0 < 0 ? IP6_ERROR_UDP_LENGTH : error0;
1450 error1 = len_diff1 < 0 ? IP6_ERROR_UDP_LENGTH : error1;
1452 ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_UDP ==
1453 IP6_ERROR_UDP_CHECKSUM);
1454 ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_ICMP ==
1455 IP6_ERROR_ICMP_CHECKSUM);
1457 (!good_l4_checksum0 ? IP6_ERROR_UDP_CHECKSUM + type0 : error0);
1459 (!good_l4_checksum1 ? IP6_ERROR_UDP_CHECKSUM + type1 : error1);
1461 /* Drop packets from unroutable hosts. */
1462 /* If this is a neighbor solicitation (ICMP), skip source RPF check */
1463 if (error0 == IP6_ERROR_UNKNOWN_PROTOCOL &&
1464 type0 != IP_BUILTIN_PROTOCOL_ICMP &&
1465 !ip6_address_is_link_local_unicast (&ip0->src_address))
1467 u32 src_adj_index0 = ip6_src_lookup_for_packet (im, p0, ip0);
1468 error0 = (ADJ_INDEX_INVALID == src_adj_index0
1469 ? IP6_ERROR_SRC_LOOKUP_MISS : error0);
1471 if (error1 == IP6_ERROR_UNKNOWN_PROTOCOL &&
1472 type1 != IP_BUILTIN_PROTOCOL_ICMP &&
1473 !ip6_address_is_link_local_unicast (&ip1->src_address))
1475 u32 src_adj_index1 = ip6_src_lookup_for_packet (im, p1, ip1);
1476 error1 = (ADJ_INDEX_INVALID == src_adj_index1
1477 ? IP6_ERROR_SRC_LOOKUP_MISS : error1);
1481 error0 != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next0;
1483 error1 != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next1;
1485 p0->error = error_node->errors[error0];
1486 p1->error = error_node->errors[error1];
1488 vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
1489 to_next, n_left_to_next,
1490 pi0, pi1, next0, next1);
1493 while (n_left_from > 0 && n_left_to_next > 0)
1498 u32 pi0, ip_len0, udp_len0, flags0, next0;
1500 u8 error0, type0, good_l4_checksum0;
1503 pi0 = to_next[0] = from[0];
1507 n_left_to_next -= 1;
1509 p0 = vlib_get_buffer (vm, pi0);
1511 ip0 = vlib_buffer_get_current (p0);
1513 type0 = lm->builtin_protocol_by_ip_protocol[ip0->protocol];
1514 next0 = lm->local_next_by_ip_protocol[ip0->protocol];
1518 good_l4_checksum0 = (flags0 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0;
1521 /* Skip HBH local processing */
1523 (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
1525 ip6_hop_by_hop_ext_t *ext_hdr =
1526 (ip6_hop_by_hop_ext_t *) ip6_next_header (ip0);
1527 next0 = lm->local_next_by_ip_protocol[ext_hdr->next_hdr];
1528 type0 = lm->builtin_protocol_by_ip_protocol[ext_hdr->next_hdr];
1530 if (PREDICT_TRUE (IP_PROTOCOL_UDP == ip6_locate_header (p0, ip0,
1534 udp0 = (udp_header_t *) ((u8 *) ip0 + udp_offset0);
1535 /* Don't verify UDP checksum for packets with explicit zero checksum. */
1536 good_l4_checksum0 |= type0 == IP_BUILTIN_PROTOCOL_UDP
1537 && udp0->checksum == 0;
1538 /* Verify UDP length. */
1539 ip_len0 = clib_net_to_host_u16 (ip0->payload_length);
1540 udp_len0 = clib_net_to_host_u16 (udp0->length);
1541 len_diff0 = ip_len0 - udp_len0;
1544 good_l4_checksum0 |= type0 == IP_BUILTIN_PROTOCOL_UNKNOWN;
1545 len_diff0 = type0 == IP_BUILTIN_PROTOCOL_UDP ? len_diff0 : 0;
1547 if (PREDICT_FALSE (type0 != IP_BUILTIN_PROTOCOL_UNKNOWN
1548 && !good_l4_checksum0
1549 && !(flags0 & IP_BUFFER_L4_CHECKSUM_COMPUTED)))
1551 flags0 = ip6_tcp_udp_icmp_validate_checksum (vm, p0);
1553 (flags0 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0;
1556 error0 = IP6_ERROR_UNKNOWN_PROTOCOL;
1558 error0 = len_diff0 < 0 ? IP6_ERROR_UDP_LENGTH : error0;
1560 ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_UDP ==
1561 IP6_ERROR_UDP_CHECKSUM);
1562 ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_ICMP ==
1563 IP6_ERROR_ICMP_CHECKSUM);
1565 (!good_l4_checksum0 ? IP6_ERROR_UDP_CHECKSUM + type0 : error0);
1567 /* If this is a neighbor solicitation (ICMP), skip source RPF check */
1568 if (error0 == IP6_ERROR_UNKNOWN_PROTOCOL &&
1569 type0 != IP_BUILTIN_PROTOCOL_ICMP &&
1570 !ip6_address_is_link_local_unicast (&ip0->src_address))
1572 u32 src_adj_index0 = ip6_src_lookup_for_packet (im, p0, ip0);
1573 error0 = (ADJ_INDEX_INVALID == src_adj_index0
1574 ? IP6_ERROR_SRC_LOOKUP_MISS : error0);
1578 error0 != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next0;
1580 p0->error = error_node->errors[error0];
1582 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1583 to_next, n_left_to_next,
1587 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1590 return frame->n_vectors;
1594 VLIB_REGISTER_NODE (ip6_local_node, static) =
1596 .function = ip6_local,
1597 .name = "ip6-local",
1598 .vector_size = sizeof (u32),
1599 .format_trace = format_ip6_forward_next_trace,
1600 .n_next_nodes = IP_LOCAL_N_NEXT,
1603 [IP_LOCAL_NEXT_DROP] = "error-drop",
1604 [IP_LOCAL_NEXT_PUNT] = "error-punt",
1605 [IP_LOCAL_NEXT_UDP_LOOKUP] = "ip6-udp-lookup",
1606 [IP_LOCAL_NEXT_ICMP] = "ip6-icmp-input",
1611 VLIB_NODE_FUNCTION_MULTIARCH (ip6_local_node, ip6_local);
1614 ip6_register_protocol (u32 protocol, u32 node_index)
1616 vlib_main_t *vm = vlib_get_main ();
1617 ip6_main_t *im = &ip6_main;
1618 ip_lookup_main_t *lm = &im->lookup_main;
1620 ASSERT (protocol < ARRAY_LEN (lm->local_next_by_ip_protocol));
1621 lm->local_next_by_ip_protocol[protocol] =
1622 vlib_node_add_next (vm, ip6_local_node.index, node_index);
1627 IP6_DISCOVER_NEIGHBOR_NEXT_DROP,
1628 IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX,
1629 IP6_DISCOVER_NEIGHBOR_N_NEXT,
1630 } ip6_discover_neighbor_next_t;
1634 IP6_DISCOVER_NEIGHBOR_ERROR_DROP,
1635 IP6_DISCOVER_NEIGHBOR_ERROR_REQUEST_SENT,
1636 IP6_DISCOVER_NEIGHBOR_ERROR_NO_SOURCE_ADDRESS,
1637 } ip6_discover_neighbor_error_t;
1640 ip6_discover_neighbor_inline (vlib_main_t * vm,
1641 vlib_node_runtime_t * node,
1642 vlib_frame_t * frame, int is_glean)
1644 vnet_main_t *vnm = vnet_get_main ();
1645 ip6_main_t *im = &ip6_main;
1646 ip_lookup_main_t *lm = &im->lookup_main;
1647 u32 *from, *to_next_drop;
1648 uword n_left_from, n_left_to_next_drop;
1649 static f64 time_last_seed_change = -1e100;
1650 static u32 hash_seeds[3];
1651 static uword hash_bitmap[256 / BITS (uword)];
1655 if (node->flags & VLIB_NODE_FLAG_TRACE)
1656 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
1658 time_now = vlib_time_now (vm);
1659 if (time_now - time_last_seed_change > 1e-3)
1662 u32 *r = clib_random_buffer_get_data (&vm->random_buffer,
1663 sizeof (hash_seeds));
1664 for (i = 0; i < ARRAY_LEN (hash_seeds); i++)
1665 hash_seeds[i] = r[i];
1667 /* Mark all hash keys as been not-seen before. */
1668 for (i = 0; i < ARRAY_LEN (hash_bitmap); i++)
1671 time_last_seed_change = time_now;
1674 from = vlib_frame_vector_args (frame);
1675 n_left_from = frame->n_vectors;
1677 while (n_left_from > 0)
1679 vlib_get_next_frame (vm, node, IP6_DISCOVER_NEIGHBOR_NEXT_DROP,
1680 to_next_drop, n_left_to_next_drop);
1682 while (n_left_from > 0 && n_left_to_next_drop > 0)
1686 u32 pi0, adj_index0, a0, b0, c0, m0, sw_if_index0, drop0;
1688 ip_adjacency_t *adj0;
1689 vnet_hw_interface_t *hw_if0;
1694 p0 = vlib_get_buffer (vm, pi0);
1696 adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
1698 ip0 = vlib_buffer_get_current (p0);
1700 adj0 = ip_get_adjacency (lm, adj_index0);
1704 ip0->dst_address.as_u64[0] =
1705 adj0->sub_type.nbr.next_hop.ip6.as_u64[0];
1706 ip0->dst_address.as_u64[1] =
1707 adj0->sub_type.nbr.next_hop.ip6.as_u64[1];
1714 sw_if_index0 = adj0->rewrite_header.sw_if_index;
1715 vnet_buffer (p0)->sw_if_index[VLIB_TX] = sw_if_index0;
1718 b0 ^= ip0->dst_address.as_u32[0];
1719 c0 ^= ip0->dst_address.as_u32[1];
1721 hash_v3_mix32 (a0, b0, c0);
1723 b0 ^= ip0->dst_address.as_u32[2];
1724 c0 ^= ip0->dst_address.as_u32[3];
1726 hash_v3_finalize32 (a0, b0, c0);
1728 c0 &= BITS (hash_bitmap) - 1;
1729 c0 = c0 / BITS (uword);
1730 m0 = (uword) 1 << (c0 % BITS (uword));
1732 bm0 = hash_bitmap[c0];
1733 drop0 = (bm0 & m0) != 0;
1735 /* Mark it as seen. */
1736 hash_bitmap[c0] = bm0 | m0;
1740 to_next_drop[0] = pi0;
1742 n_left_to_next_drop -= 1;
1744 hw_if0 = vnet_get_sup_hw_interface (vnm, sw_if_index0);
1746 /* If the interface is link-down, drop the pkt */
1747 if (!(hw_if0->flags & VNET_HW_INTERFACE_FLAG_LINK_UP))
1751 node->errors[drop0 ? IP6_DISCOVER_NEIGHBOR_ERROR_DROP
1752 : IP6_DISCOVER_NEIGHBOR_ERROR_REQUEST_SENT];
1757 * the adj has been updated to a rewrite but the node the DPO that got
1758 * us here hasn't - yet. no big deal. we'll drop while we wait.
1760 if (IP_LOOKUP_NEXT_REWRITE == adj0->lookup_next_index)
1765 icmp6_neighbor_solicitation_header_t *h0;
1768 h0 = vlib_packet_template_get_packet
1769 (vm, &im->discover_neighbor_packet_template, &bi0);
1772 * Build ethernet header.
1773 * Choose source address based on destination lookup
1776 if (ip6_src_address_for_packet (lm,
1778 &h0->ip.src_address))
1780 /* There is no address on the interface */
1782 node->errors[IP6_DISCOVER_NEIGHBOR_ERROR_NO_SOURCE_ADDRESS];
1783 vlib_buffer_free (vm, &bi0, 1);
1788 * Destination address is a solicited node multicast address.
1789 * We need to fill in
1790 * the low 24 bits with low 24 bits of target's address.
1792 h0->ip.dst_address.as_u8[13] = ip0->dst_address.as_u8[13];
1793 h0->ip.dst_address.as_u8[14] = ip0->dst_address.as_u8[14];
1794 h0->ip.dst_address.as_u8[15] = ip0->dst_address.as_u8[15];
1796 h0->neighbor.target_address = ip0->dst_address;
1798 clib_memcpy (h0->link_layer_option.ethernet_address,
1799 hw_if0->hw_address, vec_len (hw_if0->hw_address));
1801 /* $$$$ appears we need this; why is the checksum non-zero? */
1802 h0->neighbor.icmp.checksum = 0;
1803 h0->neighbor.icmp.checksum =
1804 ip6_tcp_udp_icmp_compute_checksum (vm, 0, &h0->ip,
1807 ASSERT (bogus_length == 0);
1809 vlib_buffer_copy_trace_flag (vm, p0, bi0);
1810 b0 = vlib_get_buffer (vm, bi0);
1811 vnet_buffer (b0)->sw_if_index[VLIB_TX]
1812 = vnet_buffer (p0)->sw_if_index[VLIB_TX];
1814 /* Add rewrite/encap string. */
1815 vnet_rewrite_one_header (adj0[0], h0, sizeof (ethernet_header_t));
1816 vlib_buffer_advance (b0, -adj0->rewrite_header.data_bytes);
1818 next0 = IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX;
1820 vlib_set_next_frame_buffer (vm, node, next0, bi0);
1824 vlib_put_next_frame (vm, node, IP6_DISCOVER_NEIGHBOR_NEXT_DROP,
1825 n_left_to_next_drop);
1828 return frame->n_vectors;
1832 ip6_discover_neighbor (vlib_main_t * vm,
1833 vlib_node_runtime_t * node, vlib_frame_t * frame)
1835 return (ip6_discover_neighbor_inline (vm, node, frame, 0));
1839 ip6_glean (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
1841 return (ip6_discover_neighbor_inline (vm, node, frame, 1));
1844 static char *ip6_discover_neighbor_error_strings[] = {
1845 [IP6_DISCOVER_NEIGHBOR_ERROR_DROP] = "address overflow drops",
1846 [IP6_DISCOVER_NEIGHBOR_ERROR_REQUEST_SENT] = "neighbor solicitations sent",
1847 [IP6_DISCOVER_NEIGHBOR_ERROR_NO_SOURCE_ADDRESS]
1848 = "no source address for ND solicitation",
1852 VLIB_REGISTER_NODE (ip6_discover_neighbor_node) =
1854 .function = ip6_discover_neighbor,
1855 .name = "ip6-discover-neighbor",
1856 .vector_size = sizeof (u32),
1857 .format_trace = format_ip6_forward_next_trace,
1858 .n_errors = ARRAY_LEN (ip6_discover_neighbor_error_strings),
1859 .error_strings = ip6_discover_neighbor_error_strings,
1860 .n_next_nodes = IP6_DISCOVER_NEIGHBOR_N_NEXT,
1863 [IP6_DISCOVER_NEIGHBOR_NEXT_DROP] = "error-drop",
1864 [IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX] = "interface-output",
1870 VLIB_REGISTER_NODE (ip6_glean_node) =
1872 .function = ip6_glean,
1873 .name = "ip6-glean",
1874 .vector_size = sizeof (u32),
1875 .format_trace = format_ip6_forward_next_trace,
1876 .n_errors = ARRAY_LEN (ip6_discover_neighbor_error_strings),
1877 .error_strings = ip6_discover_neighbor_error_strings,
1878 .n_next_nodes = IP6_DISCOVER_NEIGHBOR_N_NEXT,
1881 [IP6_DISCOVER_NEIGHBOR_NEXT_DROP] = "error-drop",
1882 [IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX] = "interface-output",
1888 ip6_probe_neighbor (vlib_main_t * vm, ip6_address_t * dst, u32 sw_if_index)
1890 vnet_main_t *vnm = vnet_get_main ();
1891 ip6_main_t *im = &ip6_main;
1892 icmp6_neighbor_solicitation_header_t *h;
1894 ip_interface_address_t *ia;
1895 ip_adjacency_t *adj;
1896 vnet_hw_interface_t *hi;
1897 vnet_sw_interface_t *si;
1902 si = vnet_get_sw_interface (vnm, sw_if_index);
1904 if (!(si->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP))
1906 return clib_error_return (0, "%U: interface %U down",
1907 format_ip6_address, dst,
1908 format_vnet_sw_if_index_name, vnm,
1913 ip6_interface_address_matching_destination (im, dst, sw_if_index, &ia);
1916 vnm->api_errno = VNET_API_ERROR_NO_MATCHING_INTERFACE;
1917 return clib_error_return
1918 (0, "no matching interface address for destination %U (interface %U)",
1919 format_ip6_address, dst,
1920 format_vnet_sw_if_index_name, vnm, sw_if_index);
1924 vlib_packet_template_get_packet (vm,
1925 &im->discover_neighbor_packet_template,
1928 hi = vnet_get_sup_hw_interface (vnm, sw_if_index);
1930 /* Destination address is a solicited node multicast address. We need to fill in
1931 the low 24 bits with low 24 bits of target's address. */
1932 h->ip.dst_address.as_u8[13] = dst->as_u8[13];
1933 h->ip.dst_address.as_u8[14] = dst->as_u8[14];
1934 h->ip.dst_address.as_u8[15] = dst->as_u8[15];
1936 h->ip.src_address = src[0];
1937 h->neighbor.target_address = dst[0];
1939 clib_memcpy (h->link_layer_option.ethernet_address, hi->hw_address,
1940 vec_len (hi->hw_address));
1942 h->neighbor.icmp.checksum =
1943 ip6_tcp_udp_icmp_compute_checksum (vm, 0, &h->ip, &bogus_length);
1944 ASSERT (bogus_length == 0);
1946 b = vlib_get_buffer (vm, bi);
1947 vnet_buffer (b)->sw_if_index[VLIB_RX] =
1948 vnet_buffer (b)->sw_if_index[VLIB_TX] = sw_if_index;
1950 /* Add encapsulation string for software interface (e.g. ethernet header). */
1951 adj = ip_get_adjacency (&im->lookup_main, ia->neighbor_probe_adj_index);
1952 vnet_rewrite_one_header (adj[0], h, sizeof (ethernet_header_t));
1953 vlib_buffer_advance (b, -adj->rewrite_header.data_bytes);
1956 vlib_frame_t *f = vlib_get_frame_to_node (vm, hi->output_node_index);
1957 u32 *to_next = vlib_frame_vector_args (f);
1960 vlib_put_frame_to_node (vm, hi->output_node_index, f);
1963 return /* no error */ 0;
1968 IP6_REWRITE_NEXT_DROP,
1969 IP6_REWRITE_NEXT_ICMP_ERROR,
1970 } ip6_rewrite_next_t;
1973 ip6_rewrite_inline (vlib_main_t * vm,
1974 vlib_node_runtime_t * node,
1975 vlib_frame_t * frame, int is_midchain)
1977 ip_lookup_main_t *lm = &ip6_main.lookup_main;
1978 u32 *from = vlib_frame_vector_args (frame);
1979 u32 n_left_from, n_left_to_next, *to_next, next_index;
1980 vlib_node_runtime_t *error_node =
1981 vlib_node_get_runtime (vm, ip6_input_node.index);
1983 n_left_from = frame->n_vectors;
1984 next_index = node->cached_next_index;
1985 u32 cpu_index = os_get_cpu_number ();
1987 while (n_left_from > 0)
1989 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1991 while (n_left_from >= 4 && n_left_to_next >= 2)
1993 ip_adjacency_t *adj0, *adj1;
1994 vlib_buffer_t *p0, *p1;
1995 ip6_header_t *ip0, *ip1;
1996 u32 pi0, rw_len0, next0, error0, adj_index0;
1997 u32 pi1, rw_len1, next1, error1, adj_index1;
1998 u32 tx_sw_if_index0, tx_sw_if_index1;
2000 /* Prefetch next iteration. */
2002 vlib_buffer_t *p2, *p3;
2004 p2 = vlib_get_buffer (vm, from[2]);
2005 p3 = vlib_get_buffer (vm, from[3]);
2007 vlib_prefetch_buffer_header (p2, LOAD);
2008 vlib_prefetch_buffer_header (p3, LOAD);
2010 CLIB_PREFETCH (p2->pre_data, 32, STORE);
2011 CLIB_PREFETCH (p3->pre_data, 32, STORE);
2013 CLIB_PREFETCH (p2->data, sizeof (ip0[0]), STORE);
2014 CLIB_PREFETCH (p3->data, sizeof (ip0[0]), STORE);
2017 pi0 = to_next[0] = from[0];
2018 pi1 = to_next[1] = from[1];
2023 n_left_to_next -= 2;
2025 p0 = vlib_get_buffer (vm, pi0);
2026 p1 = vlib_get_buffer (vm, pi1);
2028 adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
2029 adj_index1 = vnet_buffer (p1)->ip.adj_index[VLIB_TX];
2031 /* We should never rewrite a pkt using the MISS adjacency */
2032 ASSERT (adj_index0 && adj_index1);
2034 ip0 = vlib_buffer_get_current (p0);
2035 ip1 = vlib_buffer_get_current (p1);
2037 error0 = error1 = IP6_ERROR_NONE;
2038 next0 = next1 = IP6_REWRITE_NEXT_DROP;
2040 if (PREDICT_TRUE (!(p0->flags & VNET_BUFFER_LOCALLY_ORIGINATED)))
2042 i32 hop_limit0 = ip0->hop_limit;
2044 /* Input node should have reject packets with hop limit 0. */
2045 ASSERT (ip0->hop_limit > 0);
2049 ip0->hop_limit = hop_limit0;
2052 * If the hop count drops below 1 when forwarding, generate
2055 if (PREDICT_FALSE (hop_limit0 <= 0))
2057 error0 = IP6_ERROR_TIME_EXPIRED;
2058 next0 = IP6_REWRITE_NEXT_ICMP_ERROR;
2059 vnet_buffer (p0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
2060 icmp6_error_set_vnet_buffer (p0, ICMP6_time_exceeded,
2061 ICMP6_time_exceeded_ttl_exceeded_in_transit,
2067 p0->flags &= ~VNET_BUFFER_LOCALLY_ORIGINATED;
2069 if (PREDICT_TRUE (!(p1->flags & VNET_BUFFER_LOCALLY_ORIGINATED)))
2071 i32 hop_limit1 = ip1->hop_limit;
2073 /* Input node should have reject packets with hop limit 0. */
2074 ASSERT (ip1->hop_limit > 0);
2078 ip1->hop_limit = hop_limit1;
2081 * If the hop count drops below 1 when forwarding, generate
2084 if (PREDICT_FALSE (hop_limit1 <= 0))
2086 error1 = IP6_ERROR_TIME_EXPIRED;
2087 next1 = IP6_REWRITE_NEXT_ICMP_ERROR;
2088 vnet_buffer (p1)->sw_if_index[VLIB_TX] = (u32) ~ 0;
2089 icmp6_error_set_vnet_buffer (p1, ICMP6_time_exceeded,
2090 ICMP6_time_exceeded_ttl_exceeded_in_transit,
2096 p1->flags &= ~VNET_BUFFER_LOCALLY_ORIGINATED;
2098 adj0 = ip_get_adjacency (lm, adj_index0);
2099 adj1 = ip_get_adjacency (lm, adj_index1);
2101 rw_len0 = adj0[0].rewrite_header.data_bytes;
2102 rw_len1 = adj1[0].rewrite_header.data_bytes;
2103 vnet_buffer (p0)->ip.save_rewrite_length = rw_len0;
2104 vnet_buffer (p1)->ip.save_rewrite_length = rw_len1;
2106 vlib_increment_combined_counter (&adjacency_counters,
2107 cpu_index, adj_index0,
2108 /* packet increment */ 0,
2109 /* byte increment */ rw_len0);
2110 vlib_increment_combined_counter (&adjacency_counters,
2111 cpu_index, adj_index1,
2112 /* packet increment */ 0,
2113 /* byte increment */ rw_len1);
2115 /* Check MTU of outgoing interface. */
2117 (vlib_buffer_length_in_chain (vm, p0) >
2119 rewrite_header.max_l3_packet_bytes ? IP6_ERROR_MTU_EXCEEDED :
2122 (vlib_buffer_length_in_chain (vm, p1) >
2124 rewrite_header.max_l3_packet_bytes ? IP6_ERROR_MTU_EXCEEDED :
2127 /* Don't adjust the buffer for hop count issue; icmp-error node
2128 * wants to see the IP headerr */
2129 if (PREDICT_TRUE (error0 == IP6_ERROR_NONE))
2131 p0->current_data -= rw_len0;
2132 p0->current_length += rw_len0;
2134 tx_sw_if_index0 = adj0[0].rewrite_header.sw_if_index;
2135 vnet_buffer (p0)->sw_if_index[VLIB_TX] = tx_sw_if_index0;
2136 next0 = adj0[0].rewrite_header.next_index;
2138 vnet_feature_arc_start (lm->output_feature_arc_index,
2139 tx_sw_if_index0, &next0, p0);
2141 if (PREDICT_TRUE (error1 == IP6_ERROR_NONE))
2143 p1->current_data -= rw_len1;
2144 p1->current_length += rw_len1;
2146 tx_sw_if_index1 = adj1[0].rewrite_header.sw_if_index;
2147 vnet_buffer (p1)->sw_if_index[VLIB_TX] = tx_sw_if_index1;
2148 next1 = adj1[0].rewrite_header.next_index;
2150 vnet_feature_arc_start (lm->output_feature_arc_index,
2151 tx_sw_if_index1, &next1, p1);
2154 /* Guess we are only writing on simple Ethernet header. */
2155 vnet_rewrite_two_headers (adj0[0], adj1[0],
2156 ip0, ip1, sizeof (ethernet_header_t));
2160 adj0->sub_type.midchain.fixup_func (vm, adj0, p0);
2161 adj1->sub_type.midchain.fixup_func (vm, adj1, p1);
2164 vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
2165 to_next, n_left_to_next,
2166 pi0, pi1, next0, next1);
2169 while (n_left_from > 0 && n_left_to_next > 0)
2171 ip_adjacency_t *adj0;
2175 u32 adj_index0, next0, error0;
2176 u32 tx_sw_if_index0;
2178 pi0 = to_next[0] = from[0];
2180 p0 = vlib_get_buffer (vm, pi0);
2182 adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
2184 /* We should never rewrite a pkt using the MISS adjacency */
2185 ASSERT (adj_index0);
2187 adj0 = ip_get_adjacency (lm, adj_index0);
2189 ip0 = vlib_buffer_get_current (p0);
2191 error0 = IP6_ERROR_NONE;
2192 next0 = IP6_REWRITE_NEXT_DROP;
2194 /* Check hop limit */
2195 if (PREDICT_TRUE (!(p0->flags & VNET_BUFFER_LOCALLY_ORIGINATED)))
2197 i32 hop_limit0 = ip0->hop_limit;
2199 ASSERT (ip0->hop_limit > 0);
2203 ip0->hop_limit = hop_limit0;
2205 if (PREDICT_FALSE (hop_limit0 <= 0))
2208 * If the hop count drops below 1 when forwarding, generate
2211 error0 = IP6_ERROR_TIME_EXPIRED;
2212 next0 = IP6_REWRITE_NEXT_ICMP_ERROR;
2213 vnet_buffer (p0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
2214 icmp6_error_set_vnet_buffer (p0, ICMP6_time_exceeded,
2215 ICMP6_time_exceeded_ttl_exceeded_in_transit,
2221 p0->flags &= ~VNET_BUFFER_LOCALLY_ORIGINATED;
2224 /* Guess we are only writing on simple Ethernet header. */
2225 vnet_rewrite_one_header (adj0[0], ip0, sizeof (ethernet_header_t));
2227 /* Update packet buffer attributes/set output interface. */
2228 rw_len0 = adj0[0].rewrite_header.data_bytes;
2229 vnet_buffer (p0)->ip.save_rewrite_length = rw_len0;
2231 vlib_increment_combined_counter (&adjacency_counters,
2232 cpu_index, adj_index0,
2233 /* packet increment */ 0,
2234 /* byte increment */ rw_len0);
2236 /* Check MTU of outgoing interface. */
2238 (vlib_buffer_length_in_chain (vm, p0) >
2240 rewrite_header.max_l3_packet_bytes ? IP6_ERROR_MTU_EXCEEDED :
2243 /* Don't adjust the buffer for hop count issue; icmp-error node
2244 * wants to see the IP headerr */
2245 if (PREDICT_TRUE (error0 == IP6_ERROR_NONE))
2247 p0->current_data -= rw_len0;
2248 p0->current_length += rw_len0;
2250 tx_sw_if_index0 = adj0[0].rewrite_header.sw_if_index;
2252 vnet_buffer (p0)->sw_if_index[VLIB_TX] = tx_sw_if_index0;
2253 next0 = adj0[0].rewrite_header.next_index;
2255 vnet_feature_arc_start (lm->output_feature_arc_index,
2256 tx_sw_if_index0, &next0, p0);
2261 adj0->sub_type.midchain.fixup_func (vm, adj0, p0);
2264 p0->error = error_node->errors[error0];
2269 n_left_to_next -= 1;
2271 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
2272 to_next, n_left_to_next,
2276 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2279 /* Need to do trace after rewrites to pick up new packet data. */
2280 if (node->flags & VLIB_NODE_FLAG_TRACE)
2281 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
2283 return frame->n_vectors;
2287 ip6_rewrite (vlib_main_t * vm,
2288 vlib_node_runtime_t * node, vlib_frame_t * frame)
2290 return ip6_rewrite_inline (vm, node, frame,
2295 ip6_midchain (vlib_main_t * vm,
2296 vlib_node_runtime_t * node, vlib_frame_t * frame)
2298 return ip6_rewrite_inline (vm, node, frame,
2303 VLIB_REGISTER_NODE (ip6_midchain_node) =
2305 .function = ip6_midchain,
2306 .name = "ip6-midchain",
2307 .vector_size = sizeof (u32),
2308 .format_trace = format_ip6_forward_next_trace,
2309 .sibling_of = "ip6-rewrite",
2313 VLIB_NODE_FUNCTION_MULTIARCH (ip6_midchain_node, ip6_midchain);
2316 VLIB_REGISTER_NODE (ip6_rewrite_node) =
2318 .function = ip6_rewrite,
2319 .name = "ip6-rewrite",
2320 .vector_size = sizeof (u32),
2321 .format_trace = format_ip6_rewrite_trace,
2325 [IP6_REWRITE_NEXT_DROP] = "error-drop",
2326 [IP6_REWRITE_NEXT_ICMP_ERROR] = "ip6-icmp-error",
2331 VLIB_NODE_FUNCTION_MULTIARCH (ip6_rewrite_node, ip6_rewrite);
2334 * Hop-by-Hop handling
2337 ip6_hop_by_hop_main_t ip6_hop_by_hop_main;
2339 #define foreach_ip6_hop_by_hop_error \
2340 _(PROCESSED, "pkts with ip6 hop-by-hop options") \
2341 _(FORMAT, "incorrectly formatted hop-by-hop options") \
2342 _(UNKNOWN_OPTION, "unknown ip6 hop-by-hop options")
2346 #define _(sym,str) IP6_HOP_BY_HOP_ERROR_##sym,
2347 foreach_ip6_hop_by_hop_error
2349 IP6_HOP_BY_HOP_N_ERROR,
2350 } ip6_hop_by_hop_error_t;
2353 * Primary h-b-h handler trace support
2354 * We work pretty hard on the problem for obvious reasons
2360 u8 option_data[256];
2361 } ip6_hop_by_hop_trace_t;
2363 vlib_node_registration_t ip6_hop_by_hop_node;
2365 static char *ip6_hop_by_hop_error_strings[] = {
2366 #define _(sym,string) string,
2367 foreach_ip6_hop_by_hop_error
2372 format_ip6_hop_by_hop_trace (u8 * s, va_list * args)
2374 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
2375 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
2376 ip6_hop_by_hop_trace_t *t = va_arg (*args, ip6_hop_by_hop_trace_t *);
2377 ip6_hop_by_hop_header_t *hbh0;
2378 ip6_hop_by_hop_option_t *opt0, *limit0;
2379 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2383 hbh0 = (ip6_hop_by_hop_header_t *) t->option_data;
2385 s = format (s, "IP6_HOP_BY_HOP: next index %d len %d traced %d",
2386 t->next_index, (hbh0->length + 1) << 3, t->trace_len);
2388 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2389 limit0 = (ip6_hop_by_hop_option_t *) ((u8 *) hbh0) + t->trace_len;
2391 while (opt0 < limit0)
2396 case 0: /* Pad, just stop */
2397 opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0) + 1;
2401 if (hm->trace[type0])
2403 s = (*hm->trace[type0]) (s, opt0);
2408 format (s, "\n unrecognized option %d length %d", type0,
2412 (ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length +
2413 sizeof (ip6_hop_by_hop_option_t));
2421 ip6_scan_hbh_options (vlib_buffer_t * b0,
2423 ip6_hop_by_hop_header_t * hbh0,
2424 ip6_hop_by_hop_option_t * opt0,
2425 ip6_hop_by_hop_option_t * limit0, u32 * next0)
2427 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2431 while (opt0 < limit0)
2437 opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0) + 1;
2442 if (hm->options[type0])
2444 if ((*hm->options[type0]) (b0, ip0, opt0) < 0)
2446 error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2452 /* Unrecognized mandatory option, check the two high order bits */
2453 switch (opt0->type & HBH_OPTION_TYPE_HIGH_ORDER_BITS)
2455 case HBH_OPTION_TYPE_SKIP_UNKNOWN:
2457 case HBH_OPTION_TYPE_DISCARD_UNKNOWN:
2458 error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2459 *next0 = IP_LOOKUP_NEXT_DROP;
2461 case HBH_OPTION_TYPE_DISCARD_UNKNOWN_ICMP:
2462 error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2463 *next0 = IP_LOOKUP_NEXT_ICMP_ERROR;
2464 icmp6_error_set_vnet_buffer (b0, ICMP6_parameter_problem,
2465 ICMP6_parameter_problem_unrecognized_option,
2466 (u8 *) opt0 - (u8 *) ip0);
2468 case HBH_OPTION_TYPE_DISCARD_UNKNOWN_ICMP_NOT_MCAST:
2469 error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2470 if (!ip6_address_is_multicast (&ip0->dst_address))
2472 *next0 = IP_LOOKUP_NEXT_ICMP_ERROR;
2473 icmp6_error_set_vnet_buffer (b0,
2474 ICMP6_parameter_problem,
2475 ICMP6_parameter_problem_unrecognized_option,
2476 (u8 *) opt0 - (u8 *) ip0);
2480 *next0 = IP_LOOKUP_NEXT_DROP;
2488 (ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length +
2489 sizeof (ip6_hop_by_hop_option_t));
2495 * Process the Hop-by-Hop Options header
2498 ip6_hop_by_hop (vlib_main_t * vm,
2499 vlib_node_runtime_t * node, vlib_frame_t * frame)
2501 vlib_node_runtime_t *error_node =
2502 vlib_node_get_runtime (vm, ip6_hop_by_hop_node.index);
2503 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2504 u32 n_left_from, *from, *to_next;
2505 ip_lookup_next_t next_index;
2506 ip6_main_t *im = &ip6_main;
2507 ip_lookup_main_t *lm = &im->lookup_main;
2509 from = vlib_frame_vector_args (frame);
2510 n_left_from = frame->n_vectors;
2511 next_index = node->cached_next_index;
2513 while (n_left_from > 0)
2517 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
2519 while (n_left_from >= 4 && n_left_to_next >= 2)
2522 vlib_buffer_t *b0, *b1;
2524 ip6_header_t *ip0, *ip1;
2525 ip6_hop_by_hop_header_t *hbh0, *hbh1;
2526 ip6_hop_by_hop_option_t *opt0, *limit0, *opt1, *limit1;
2527 u8 error0 = 0, error1 = 0;
2529 /* Prefetch next iteration. */
2531 vlib_buffer_t *p2, *p3;
2533 p2 = vlib_get_buffer (vm, from[2]);
2534 p3 = vlib_get_buffer (vm, from[3]);
2536 vlib_prefetch_buffer_header (p2, LOAD);
2537 vlib_prefetch_buffer_header (p3, LOAD);
2539 CLIB_PREFETCH (p2->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
2540 CLIB_PREFETCH (p3->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
2543 /* Speculatively enqueue b0, b1 to the current next frame */
2544 to_next[0] = bi0 = from[0];
2545 to_next[1] = bi1 = from[1];
2549 n_left_to_next -= 2;
2551 b0 = vlib_get_buffer (vm, bi0);
2552 b1 = vlib_get_buffer (vm, bi1);
2554 /* Default use the next_index from the adjacency. A HBH option rarely redirects to a different node */
2555 u32 adj_index0 = vnet_buffer (b0)->ip.adj_index[VLIB_TX];
2556 ip_adjacency_t *adj0 = ip_get_adjacency (lm, adj_index0);
2557 u32 adj_index1 = vnet_buffer (b1)->ip.adj_index[VLIB_TX];
2558 ip_adjacency_t *adj1 = ip_get_adjacency (lm, adj_index1);
2560 /* Default use the next_index from the adjacency. A HBH option rarely redirects to a different node */
2561 next0 = adj0->lookup_next_index;
2562 next1 = adj1->lookup_next_index;
2564 ip0 = vlib_buffer_get_current (b0);
2565 ip1 = vlib_buffer_get_current (b1);
2566 hbh0 = (ip6_hop_by_hop_header_t *) (ip0 + 1);
2567 hbh1 = (ip6_hop_by_hop_header_t *) (ip1 + 1);
2568 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2569 opt1 = (ip6_hop_by_hop_option_t *) (hbh1 + 1);
2571 (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 +
2572 ((hbh0->length + 1) << 3));
2574 (ip6_hop_by_hop_option_t *) ((u8 *) hbh1 +
2575 ((hbh1->length + 1) << 3));
2578 * Basic validity checks
2580 if ((hbh0->length + 1) << 3 >
2581 clib_net_to_host_u16 (ip0->payload_length))
2583 error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2584 next0 = IP_LOOKUP_NEXT_DROP;
2587 /* Scan the set of h-b-h options, process ones that we understand */
2588 error0 = ip6_scan_hbh_options (b0, ip0, hbh0, opt0, limit0, &next0);
2590 if ((hbh1->length + 1) << 3 >
2591 clib_net_to_host_u16 (ip1->payload_length))
2593 error1 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2594 next1 = IP_LOOKUP_NEXT_DROP;
2597 /* Scan the set of h-b-h options, process ones that we understand */
2598 error1 = ip6_scan_hbh_options (b1, ip1, hbh1, opt1, limit1, &next1);
2601 /* Has the classifier flagged this buffer for special treatment? */
2604 && (vnet_buffer (b0)->l2_classify.opaque_index & OI_DECAP)))
2605 next0 = hm->next_override;
2607 /* Has the classifier flagged this buffer for special treatment? */
2610 && (vnet_buffer (b1)->l2_classify.opaque_index & OI_DECAP)))
2611 next1 = hm->next_override;
2613 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)))
2615 if (b0->flags & VLIB_BUFFER_IS_TRACED)
2617 ip6_hop_by_hop_trace_t *t =
2618 vlib_add_trace (vm, node, b0, sizeof (*t));
2619 u32 trace_len = (hbh0->length + 1) << 3;
2620 t->next_index = next0;
2621 /* Capture the h-b-h option verbatim */
2624 ARRAY_LEN (t->option_data) ? trace_len :
2625 ARRAY_LEN (t->option_data);
2626 t->trace_len = trace_len;
2627 clib_memcpy (t->option_data, hbh0, trace_len);
2629 if (b1->flags & VLIB_BUFFER_IS_TRACED)
2631 ip6_hop_by_hop_trace_t *t =
2632 vlib_add_trace (vm, node, b1, sizeof (*t));
2633 u32 trace_len = (hbh1->length + 1) << 3;
2634 t->next_index = next1;
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, hbh1, trace_len);
2646 b0->error = error_node->errors[error0];
2647 b1->error = error_node->errors[error1];
2649 /* verify speculative enqueue, maybe switch current next frame */
2650 vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
2651 n_left_to_next, bi0, bi1, next0,
2655 while (n_left_from > 0 && n_left_to_next > 0)
2661 ip6_hop_by_hop_header_t *hbh0;
2662 ip6_hop_by_hop_option_t *opt0, *limit0;
2665 /* Speculatively enqueue b0 to the current next frame */
2671 n_left_to_next -= 1;
2673 b0 = vlib_get_buffer (vm, bi0);
2675 * Default use the next_index from the adjacency.
2676 * A HBH option rarely redirects to a different node
2678 u32 adj_index0 = vnet_buffer (b0)->ip.adj_index[VLIB_TX];
2679 ip_adjacency_t *adj0 = ip_get_adjacency (lm, adj_index0);
2680 next0 = adj0->lookup_next_index;
2682 ip0 = vlib_buffer_get_current (b0);
2683 hbh0 = (ip6_hop_by_hop_header_t *) (ip0 + 1);
2684 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2686 (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 +
2687 ((hbh0->length + 1) << 3));
2690 * Basic validity checks
2692 if ((hbh0->length + 1) << 3 >
2693 clib_net_to_host_u16 (ip0->payload_length))
2695 error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2696 next0 = IP_LOOKUP_NEXT_DROP;
2700 /* Scan the set of h-b-h options, process ones that we understand */
2701 error0 = ip6_scan_hbh_options (b0, ip0, hbh0, opt0, limit0, &next0);
2704 /* Has the classifier flagged this buffer for special treatment? */
2707 && (vnet_buffer (b0)->l2_classify.opaque_index & OI_DECAP)))
2708 next0 = hm->next_override;
2710 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
2712 ip6_hop_by_hop_trace_t *t =
2713 vlib_add_trace (vm, node, b0, sizeof (*t));
2714 u32 trace_len = (hbh0->length + 1) << 3;
2715 t->next_index = next0;
2716 /* Capture the h-b-h option verbatim */
2719 ARRAY_LEN (t->option_data) ? trace_len :
2720 ARRAY_LEN (t->option_data);
2721 t->trace_len = trace_len;
2722 clib_memcpy (t->option_data, hbh0, trace_len);
2725 b0->error = error_node->errors[error0];
2727 /* verify speculative enqueue, maybe switch current next frame */
2728 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
2729 n_left_to_next, bi0, next0);
2731 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2733 return frame->n_vectors;
2737 VLIB_REGISTER_NODE (ip6_hop_by_hop_node) =
2739 .function = ip6_hop_by_hop,
2740 .name = "ip6-hop-by-hop",
2741 .sibling_of = "ip6-lookup",
2742 .vector_size = sizeof (u32),
2743 .format_trace = format_ip6_hop_by_hop_trace,
2744 .type = VLIB_NODE_TYPE_INTERNAL,
2745 .n_errors = ARRAY_LEN (ip6_hop_by_hop_error_strings),
2746 .error_strings = ip6_hop_by_hop_error_strings,
2751 VLIB_NODE_FUNCTION_MULTIARCH (ip6_hop_by_hop_node, ip6_hop_by_hop);
2753 static clib_error_t *
2754 ip6_hop_by_hop_init (vlib_main_t * vm)
2756 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2757 memset (hm->options, 0, sizeof (hm->options));
2758 memset (hm->trace, 0, sizeof (hm->trace));
2759 hm->next_override = IP6_LOOKUP_NEXT_POP_HOP_BY_HOP;
2763 VLIB_INIT_FUNCTION (ip6_hop_by_hop_init);
2766 ip6_hbh_set_next_override (uword next)
2768 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2770 hm->next_override = next;
2774 ip6_hbh_register_option (u8 option,
2775 int options (vlib_buffer_t * b, ip6_header_t * ip,
2776 ip6_hop_by_hop_option_t * opt),
2777 u8 * trace (u8 * s, ip6_hop_by_hop_option_t * opt))
2779 ip6_main_t *im = &ip6_main;
2780 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2782 ASSERT (option < ARRAY_LEN (hm->options));
2784 /* Already registered */
2785 if (hm->options[option])
2788 hm->options[option] = options;
2789 hm->trace[option] = trace;
2791 /* Set global variable */
2792 im->hbh_enabled = 1;
2798 ip6_hbh_unregister_option (u8 option)
2800 ip6_main_t *im = &ip6_main;
2801 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2803 ASSERT (option < ARRAY_LEN (hm->options));
2805 /* Not registered */
2806 if (!hm->options[option])
2809 hm->options[option] = NULL;
2810 hm->trace[option] = NULL;
2812 /* Disable global knob if this was the last option configured */
2815 for (i = 0; i < 256; i++)
2817 if (hm->options[option])
2824 im->hbh_enabled = 0;
2829 /* Global IP6 main. */
2830 ip6_main_t ip6_main;
2832 static clib_error_t *
2833 ip6_lookup_init (vlib_main_t * vm)
2835 ip6_main_t *im = &ip6_main;
2836 clib_error_t *error;
2839 if ((error = vlib_call_init_function (vm, vnet_feature_init)))
2842 for (i = 0; i < ARRAY_LEN (im->fib_masks); i++)
2849 for (j = 0; j < i0; j++)
2850 im->fib_masks[i].as_u32[j] = ~0;
2853 im->fib_masks[i].as_u32[i0] =
2854 clib_host_to_net_u32 (pow2_mask (i1) << (32 - i1));
2857 ip_lookup_init (&im->lookup_main, /* is_ip6 */ 1);
2859 if (im->lookup_table_nbuckets == 0)
2860 im->lookup_table_nbuckets = IP6_FIB_DEFAULT_HASH_NUM_BUCKETS;
2862 im->lookup_table_nbuckets = 1 << max_log2 (im->lookup_table_nbuckets);
2864 if (im->lookup_table_size == 0)
2865 im->lookup_table_size = IP6_FIB_DEFAULT_HASH_MEMORY_SIZE;
2867 BV (clib_bihash_init) (&(im->ip6_table[IP6_FIB_TABLE_FWDING].ip6_hash),
2868 "ip6 FIB fwding table",
2869 im->lookup_table_nbuckets, im->lookup_table_size);
2870 BV (clib_bihash_init) (&im->ip6_table[IP6_FIB_TABLE_NON_FWDING].ip6_hash,
2871 "ip6 FIB non-fwding table",
2872 im->lookup_table_nbuckets, im->lookup_table_size);
2874 /* Create FIB with index 0 and table id of 0. */
2875 fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6, 0);
2879 pn = pg_get_node (ip6_lookup_node.index);
2880 pn->unformat_edit = unformat_pg_ip6_header;
2883 /* Unless explicitly configured, don't process HBH options */
2884 im->hbh_enabled = 0;
2887 icmp6_neighbor_solicitation_header_t p;
2889 memset (&p, 0, sizeof (p));
2891 p.ip.ip_version_traffic_class_and_flow_label =
2892 clib_host_to_net_u32 (0x6 << 28);
2893 p.ip.payload_length =
2894 clib_host_to_net_u16 (sizeof (p) -
2896 (icmp6_neighbor_solicitation_header_t, neighbor));
2897 p.ip.protocol = IP_PROTOCOL_ICMP6;
2898 p.ip.hop_limit = 255;
2899 ip6_set_solicited_node_multicast_address (&p.ip.dst_address, 0);
2901 p.neighbor.icmp.type = ICMP6_neighbor_solicitation;
2903 p.link_layer_option.header.type =
2904 ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address;
2905 p.link_layer_option.header.n_data_u64s =
2906 sizeof (p.link_layer_option) / sizeof (u64);
2908 vlib_packet_template_init (vm,
2909 &im->discover_neighbor_packet_template,
2911 /* alloc chunk size */ 8,
2912 "ip6 neighbor discovery");
2918 VLIB_INIT_FUNCTION (ip6_lookup_init);
2920 static clib_error_t *
2921 add_del_ip6_interface_table (vlib_main_t * vm,
2922 unformat_input_t * input,
2923 vlib_cli_command_t * cmd)
2925 vnet_main_t *vnm = vnet_get_main ();
2926 clib_error_t *error = 0;
2927 u32 sw_if_index, table_id;
2931 if (!unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
2933 error = clib_error_return (0, "unknown interface `%U'",
2934 format_unformat_error, input);
2938 if (unformat (input, "%d", &table_id))
2942 error = clib_error_return (0, "expected table id `%U'",
2943 format_unformat_error, input);
2948 u32 fib_index = fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6,
2951 vec_validate (ip6_main.fib_index_by_sw_if_index, sw_if_index);
2952 ip6_main.fib_index_by_sw_if_index[sw_if_index] = fib_index;
2961 * Place the indicated interface into the supplied IPv6 FIB table (also known
2962 * as a VRF). If the FIB table does not exist, this command creates it. To
2963 * display the current IPv6 FIB table, use the command '<em>show ip6 fib</em>'.
2964 * FIB table will only be displayed if a route has been added to the table, or
2965 * an IP Address is assigned to an interface in the table (which adds a route
2968 * @note IP addresses added after setting the interface IP table end up in
2969 * the indicated FIB table. If the IP address is added prior to adding the
2970 * interface to the FIB table, it will NOT be part of the FIB table. Predictable
2971 * but potentially counter-intuitive results occur if you provision interface
2972 * addresses in multiple FIBs. Upon RX, packets will be processed in the last
2973 * IP table ID provisioned. It might be marginally useful to evade source RPF
2974 * drops to put an interface address into multiple FIBs.
2977 * Example of how to add an interface to an IPv6 FIB table (where 2 is the table-id):
2978 * @cliexcmd{set interface ip6 table GigabitEthernet2/0/0 2}
2981 VLIB_CLI_COMMAND (set_interface_ip6_table_command, static) =
2983 .path = "set interface ip6 table",
2984 .function = add_del_ip6_interface_table,
2985 .short_help = "set interface ip6 table <interface> <table-id>"
2990 ip6_link_local_address_from_ethernet_mac_address (ip6_address_t * ip,
2993 ip->as_u64[0] = clib_host_to_net_u64 (0xFE80000000000000ULL);
2994 /* Invert the "u" bit */
2995 ip->as_u8[8] = mac[0] ^ (1 << 1);
2996 ip->as_u8[9] = mac[1];
2997 ip->as_u8[10] = mac[2];
2998 ip->as_u8[11] = 0xFF;
2999 ip->as_u8[12] = 0xFE;
3000 ip->as_u8[13] = mac[3];
3001 ip->as_u8[14] = mac[4];
3002 ip->as_u8[15] = mac[5];
3006 ip6_ethernet_mac_address_from_link_local_address (u8 * mac,
3009 /* Invert the previously inverted "u" bit */
3010 mac[0] = ip->as_u8[8] ^ (1 << 1);
3011 mac[1] = ip->as_u8[9];
3012 mac[2] = ip->as_u8[10];
3013 mac[3] = ip->as_u8[13];
3014 mac[4] = ip->as_u8[14];
3015 mac[5] = ip->as_u8[15];
3018 static clib_error_t *
3019 test_ip6_link_command_fn (vlib_main_t * vm,
3020 unformat_input_t * input, vlib_cli_command_t * cmd)
3023 ip6_address_t _a, *a = &_a;
3025 if (unformat (input, "%U", unformat_ethernet_address, mac))
3027 ip6_link_local_address_from_ethernet_mac_address (a, mac);
3028 vlib_cli_output (vm, "Link local address: %U", format_ip6_address, a);
3029 ip6_ethernet_mac_address_from_link_local_address (mac, a);
3030 vlib_cli_output (vm, "Original MAC address: %U",
3031 format_ethernet_address, mac);
3038 * This command converts the given MAC Address into an IPv6 link-local
3042 * Example of how to create an IPv6 link-local address:
3043 * @cliexstart{test ip6 link 16:d9:e0:91:79:86}
3044 * Link local address: fe80::14d9:e0ff:fe91:7986
3045 * Original MAC address: 16:d9:e0:91:79:86
3049 VLIB_CLI_COMMAND (test_link_command, static) =
3051 .path = "test ip6 link",
3052 .function = test_ip6_link_command_fn,
3053 .short_help = "test ip6 link <mac-address>",
3058 vnet_set_ip6_flow_hash (u32 table_id, u32 flow_hash_config)
3060 ip6_main_t *im6 = &ip6_main;
3062 uword *p = hash_get (im6->fib_index_by_table_id, table_id);
3067 fib = ip6_fib_get (p[0]);
3069 fib->flow_hash_config = flow_hash_config;
3073 static clib_error_t *
3074 set_ip6_flow_hash_command_fn (vlib_main_t * vm,
3075 unformat_input_t * input,
3076 vlib_cli_command_t * cmd)
3080 u32 flow_hash_config = 0;
3083 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
3085 if (unformat (input, "table %d", &table_id))
3088 else if (unformat (input, #a)) { flow_hash_config |= v; matched=1;}
3089 foreach_flow_hash_bit
3096 return clib_error_return (0, "unknown input `%U'",
3097 format_unformat_error, input);
3099 rv = vnet_set_ip6_flow_hash (table_id, flow_hash_config);
3106 return clib_error_return (0, "no such FIB table %d", table_id);
3109 clib_warning ("BUG: illegal flow hash config 0x%x", flow_hash_config);
3117 * Configure the set of IPv6 fields used by the flow hash.
3121 * Example of how to set the flow hash on a given table:
3122 * @cliexcmd{set ip6 flow-hash table 8 dst sport dport proto}
3124 * Example of display the configured flow hash:
3125 * @cliexstart{show ip6 fib}
3126 * ipv6-VRF:0, fib_index 0, flow hash: src dst sport dport proto
3129 * [@0]: dpo-load-balance: [index:5 buckets:1 uRPF:5 to:[0:0]]
3130 * [0] [@0]: dpo-drop ip6
3133 * [@0]: dpo-load-balance: [index:10 buckets:1 uRPF:10 to:[0:0]]
3134 * [0] [@2]: dpo-receive
3137 * [@0]: dpo-load-balance: [index:8 buckets:1 uRPF:8 to:[0:0]]
3138 * [0] [@2]: dpo-receive
3141 * [@0]: dpo-load-balance: [index:7 buckets:1 uRPF:7 to:[0:0]]
3142 * [0] [@2]: dpo-receive
3145 * [@0]: dpo-load-balance: [index:9 buckets:1 uRPF:9 to:[0:0]]
3146 * [0] [@2]: dpo-receive
3147 * ff02::1:ff00:0/104
3149 * [@0]: dpo-load-balance: [index:6 buckets:1 uRPF:6 to:[0:0]]
3150 * [0] [@2]: dpo-receive
3151 * ipv6-VRF:8, fib_index 1, flow hash: dst sport dport proto
3154 * [@0]: dpo-load-balance: [index:21 buckets:1 uRPF:20 to:[0:0]]
3155 * [0] [@0]: dpo-drop ip6
3158 * [@0]: dpo-load-balance: [index:27 buckets:1 uRPF:26 to:[0:0]]
3159 * [0] [@4]: ipv6-glean: af_packet0
3162 * [@0]: dpo-load-balance: [index:28 buckets:1 uRPF:27 to:[0:0]]
3163 * [0] [@2]: dpo-receive: @::a:1:1:0:7 on af_packet0
3166 * [@0]: dpo-load-balance: [index:26 buckets:1 uRPF:25 to:[0:0]]
3167 * [0] [@2]: dpo-receive
3168 * fe80::fe:3eff:fe3e:9222/128
3170 * [@0]: dpo-load-balance: [index:29 buckets:1 uRPF:28 to:[0:0]]
3171 * [0] [@2]: dpo-receive: fe80::fe:3eff:fe3e:9222 on af_packet0
3174 * [@0]: dpo-load-balance: [index:24 buckets:1 uRPF:23 to:[0:0]]
3175 * [0] [@2]: dpo-receive
3178 * [@0]: dpo-load-balance: [index:23 buckets:1 uRPF:22 to:[0:0]]
3179 * [0] [@2]: dpo-receive
3182 * [@0]: dpo-load-balance: [index:25 buckets:1 uRPF:24 to:[0:0]]
3183 * [0] [@2]: dpo-receive
3184 * ff02::1:ff00:0/104
3186 * [@0]: dpo-load-balance: [index:22 buckets:1 uRPF:21 to:[0:0]]
3187 * [0] [@2]: dpo-receive
3192 VLIB_CLI_COMMAND (set_ip6_flow_hash_command, static) =
3194 .path = "set ip6 flow-hash",
3196 "set ip6 flow-hash table <table-id> [src] [dst] [sport] [dport] [proto] [reverse]",
3197 .function = set_ip6_flow_hash_command_fn,
3201 static clib_error_t *
3202 show_ip6_local_command_fn (vlib_main_t * vm,
3203 unformat_input_t * input, vlib_cli_command_t * cmd)
3205 ip6_main_t *im = &ip6_main;
3206 ip_lookup_main_t *lm = &im->lookup_main;
3209 vlib_cli_output (vm, "Protocols handled by ip6_local");
3210 for (i = 0; i < ARRAY_LEN (lm->local_next_by_ip_protocol); i++)
3212 if (lm->local_next_by_ip_protocol[i] != IP_LOCAL_NEXT_PUNT)
3213 vlib_cli_output (vm, "%d", i);
3221 * Display the set of protocols handled by the local IPv6 stack.
3224 * Example of how to display local protocol table:
3225 * @cliexstart{show ip6 local}
3226 * Protocols handled by ip6_local
3234 VLIB_CLI_COMMAND (show_ip6_local, static) =
3236 .path = "show ip6 local",
3237 .function = show_ip6_local_command_fn,
3238 .short_help = "show ip6 local",
3243 vnet_set_ip6_classify_intfc (vlib_main_t * vm, u32 sw_if_index,
3246 vnet_main_t *vnm = vnet_get_main ();
3247 vnet_interface_main_t *im = &vnm->interface_main;
3248 ip6_main_t *ipm = &ip6_main;
3249 ip_lookup_main_t *lm = &ipm->lookup_main;
3250 vnet_classify_main_t *cm = &vnet_classify_main;
3251 ip6_address_t *if_addr;
3253 if (pool_is_free_index (im->sw_interfaces, sw_if_index))
3254 return VNET_API_ERROR_NO_MATCHING_INTERFACE;
3256 if (table_index != ~0 && pool_is_free_index (cm->tables, table_index))
3257 return VNET_API_ERROR_NO_SUCH_ENTRY;
3259 vec_validate (lm->classify_table_index_by_sw_if_index, sw_if_index);
3260 lm->classify_table_index_by_sw_if_index[sw_if_index] = table_index;
3262 if_addr = ip6_interface_first_address (ipm, sw_if_index, NULL);
3264 if (NULL != if_addr)
3266 fib_prefix_t pfx = {
3268 .fp_proto = FIB_PROTOCOL_IP6,
3269 .fp_addr.ip6 = *if_addr,
3273 fib_index = fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4,
3277 if (table_index != (u32) ~ 0)
3279 dpo_id_t dpo = DPO_INVALID;
3284 classify_dpo_create (DPO_PROTO_IP6, table_index));
3286 fib_table_entry_special_dpo_add (fib_index,
3288 FIB_SOURCE_CLASSIFY,
3289 FIB_ENTRY_FLAG_NONE, &dpo);
3294 fib_table_entry_special_remove (fib_index,
3295 &pfx, FIB_SOURCE_CLASSIFY);
3302 static clib_error_t *
3303 set_ip6_classify_command_fn (vlib_main_t * vm,
3304 unformat_input_t * input,
3305 vlib_cli_command_t * cmd)
3307 u32 table_index = ~0;
3308 int table_index_set = 0;
3309 u32 sw_if_index = ~0;
3312 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
3314 if (unformat (input, "table-index %d", &table_index))
3315 table_index_set = 1;
3316 else if (unformat (input, "intfc %U", unformat_vnet_sw_interface,
3317 vnet_get_main (), &sw_if_index))
3323 if (table_index_set == 0)
3324 return clib_error_return (0, "classify table-index must be specified");
3326 if (sw_if_index == ~0)
3327 return clib_error_return (0, "interface / subif must be specified");
3329 rv = vnet_set_ip6_classify_intfc (vm, sw_if_index, table_index);
3336 case VNET_API_ERROR_NO_MATCHING_INTERFACE:
3337 return clib_error_return (0, "No such interface");
3339 case VNET_API_ERROR_NO_SUCH_ENTRY:
3340 return clib_error_return (0, "No such classifier table");
3346 * Assign a classification table to an interface. The classification
3347 * table is created using the '<em>classify table</em>' and '<em>classify session</em>'
3348 * commands. Once the table is create, use this command to filter packets
3352 * Example of how to assign a classification table to an interface:
3353 * @cliexcmd{set ip6 classify intfc GigabitEthernet2/0/0 table-index 1}
3356 VLIB_CLI_COMMAND (set_ip6_classify_command, static) =
3358 .path = "set ip6 classify",
3360 "set ip6 classify intfc <interface> table-index <classify-idx>",
3361 .function = set_ip6_classify_command_fn,
3365 static clib_error_t *
3366 ip6_config (vlib_main_t * vm, unformat_input_t * input)
3368 ip6_main_t *im = &ip6_main;
3373 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
3375 if (unformat (input, "hash-buckets %d", &tmp))
3377 else if (unformat (input, "heap-size %dm", &tmp))
3378 heapsize = ((u64) tmp) << 20;
3379 else if (unformat (input, "heap-size %dM", &tmp))
3380 heapsize = ((u64) tmp) << 20;
3381 else if (unformat (input, "heap-size %dg", &tmp))
3382 heapsize = ((u64) tmp) << 30;
3383 else if (unformat (input, "heap-size %dG", &tmp))
3384 heapsize = ((u64) tmp) << 30;
3386 return clib_error_return (0, "unknown input '%U'",
3387 format_unformat_error, input);
3390 im->lookup_table_nbuckets = nbuckets;
3391 im->lookup_table_size = heapsize;
3396 VLIB_EARLY_CONFIG_FUNCTION (ip6_config, "ip6");
3399 * fd.io coding-style-patch-verification: ON
3402 * eval: (c-set-style "gnu")