2 * Copyright (c) 2015 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>
53 ip6_forward_next_trace (vlib_main_t * vm,
54 vlib_node_runtime_t * node,
56 vlib_rx_or_tx_t which_adj_index);
59 ip6_lookup_inline (vlib_main_t * vm,
60 vlib_node_runtime_t * node,
63 ip6_main_t * im = &ip6_main;
64 vlib_combined_counter_main_t * cm = &load_balance_main.lbm_to_counters;
65 u32 n_left_from, n_left_to_next, * from, * to_next;
66 ip_lookup_next_t next;
67 u32 cpu_index = os_get_cpu_number();
69 from = vlib_frame_vector_args (frame);
70 n_left_from = frame->n_vectors;
71 next = node->cached_next_index;
73 while (n_left_from > 0)
75 vlib_get_next_frame (vm, node, next,
76 to_next, n_left_to_next);
78 while (n_left_from >= 4 && n_left_to_next >= 2)
80 vlib_buffer_t * p0, * p1;
81 u32 pi0, pi1, lbi0, lbi1, wrong_next;
82 ip_lookup_next_t next0, next1;
83 ip6_header_t * ip0, * ip1;
84 ip6_address_t * dst_addr0, * dst_addr1;
85 u32 fib_index0, fib_index1;
86 u32 flow_hash_config0, flow_hash_config1;
87 const dpo_id_t *dpo0, *dpo1;
88 const load_balance_t *lb0, *lb1;
90 /* Prefetch next iteration. */
92 vlib_buffer_t * p2, * p3;
94 p2 = vlib_get_buffer (vm, from[2]);
95 p3 = vlib_get_buffer (vm, from[3]);
97 vlib_prefetch_buffer_header (p2, LOAD);
98 vlib_prefetch_buffer_header (p3, LOAD);
99 CLIB_PREFETCH (p2->data, sizeof (ip0[0]), LOAD);
100 CLIB_PREFETCH (p3->data, sizeof (ip0[0]), LOAD);
103 pi0 = to_next[0] = from[0];
104 pi1 = to_next[1] = from[1];
106 p0 = vlib_get_buffer (vm, pi0);
107 p1 = vlib_get_buffer (vm, pi1);
109 ip0 = vlib_buffer_get_current (p0);
110 ip1 = vlib_buffer_get_current (p1);
112 dst_addr0 = &ip0->dst_address;
113 dst_addr1 = &ip1->dst_address;
115 fib_index0 = vec_elt (im->fib_index_by_sw_if_index, vnet_buffer (p0)->sw_if_index[VLIB_RX]);
116 fib_index1 = vec_elt (im->fib_index_by_sw_if_index, vnet_buffer (p1)->sw_if_index[VLIB_RX]);
118 fib_index0 = (vnet_buffer(p0)->sw_if_index[VLIB_TX] == (u32)~0) ?
119 fib_index0 : vnet_buffer(p0)->sw_if_index[VLIB_TX];
120 fib_index1 = (vnet_buffer(p1)->sw_if_index[VLIB_TX] == (u32)~0) ?
121 fib_index1 : vnet_buffer(p1)->sw_if_index[VLIB_TX];
123 lbi0 = ip6_fib_table_fwding_lookup (im, fib_index0, dst_addr0);
124 lbi1 = ip6_fib_table_fwding_lookup (im, fib_index1, dst_addr1);
126 lb0 = load_balance_get (lbi0);
127 lb1 = load_balance_get (lbi1);
129 vnet_buffer (p0)->ip.flow_hash =
130 vnet_buffer(p1)->ip.flow_hash = 0;
132 if (PREDICT_FALSE(lb0->lb_n_buckets > 1))
134 flow_hash_config0 = lb0->lb_hash_config;
135 vnet_buffer (p0)->ip.flow_hash =
136 ip6_compute_flow_hash (ip0, flow_hash_config0);
138 if (PREDICT_FALSE(lb1->lb_n_buckets > 1))
140 flow_hash_config1 = lb1->lb_hash_config;
141 vnet_buffer (p1)->ip.flow_hash =
142 ip6_compute_flow_hash (ip1, flow_hash_config1);
145 ASSERT (lb0->lb_n_buckets > 0);
146 ASSERT (lb1->lb_n_buckets > 0);
147 ASSERT (is_pow2 (lb0->lb_n_buckets));
148 ASSERT (is_pow2 (lb1->lb_n_buckets));
149 dpo0 = load_balance_get_bucket_i(lb0,
150 (vnet_buffer (p0)->ip.flow_hash &
151 lb0->lb_n_buckets_minus_1));
152 dpo1 = load_balance_get_bucket_i(lb1,
153 (vnet_buffer (p1)->ip.flow_hash &
154 lb1->lb_n_buckets_minus_1));
156 next0 = dpo0->dpoi_next_node;
157 next1 = dpo1->dpoi_next_node;
159 /* Only process the HBH Option Header if explicitly configured to do so */
160 next0 = ((ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS) &&
162 (ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP :
164 next1 = ((ip1->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS) &&
166 (ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP :
169 vnet_buffer (p0)->ip.adj_index[VLIB_TX] = dpo0->dpoi_index;
170 vnet_buffer (p1)->ip.adj_index[VLIB_TX] = dpo1->dpoi_index;
172 vlib_increment_combined_counter
173 (cm, cpu_index, lbi0, 1,
174 vlib_buffer_length_in_chain (vm, p0));
175 vlib_increment_combined_counter
176 (cm, cpu_index, lbi1, 1,
177 vlib_buffer_length_in_chain (vm, p1));
184 wrong_next = (next0 != next) + 2*(next1 != next);
185 if (PREDICT_FALSE (wrong_next != 0))
194 vlib_set_next_frame_buffer (vm, node, next0, pi0);
201 vlib_set_next_frame_buffer (vm, node, next1, pi1);
208 vlib_set_next_frame_buffer (vm, node, next0, pi0);
209 vlib_set_next_frame_buffer (vm, node, next1, pi1);
213 vlib_put_next_frame (vm, node, next, n_left_to_next);
215 vlib_get_next_frame (vm, node, next, to_next, n_left_to_next);
221 while (n_left_from > 0 && n_left_to_next > 0)
226 ip_lookup_next_t next0;
227 load_balance_t * lb0;
228 ip6_address_t * dst_addr0;
229 u32 fib_index0, flow_hash_config0;
230 const dpo_id_t *dpo0;
235 p0 = vlib_get_buffer (vm, pi0);
237 ip0 = vlib_buffer_get_current (p0);
239 dst_addr0 = &ip0->dst_address;
241 fib_index0 = vec_elt (im->fib_index_by_sw_if_index, vnet_buffer (p0)->sw_if_index[VLIB_RX]);
242 fib_index0 = (vnet_buffer(p0)->sw_if_index[VLIB_TX] == (u32)~0) ?
243 fib_index0 : vnet_buffer(p0)->sw_if_index[VLIB_TX];
246 ip6_fib_get (fib_index0)->flow_hash_config;
248 lbi0 = ip6_fib_table_fwding_lookup (im, fib_index0, dst_addr0);
250 lb0 = load_balance_get (lbi0);
252 vnet_buffer (p0)->ip.flow_hash = 0;
254 if (PREDICT_FALSE(lb0->lb_n_buckets > 1))
256 flow_hash_config0 = lb0->lb_hash_config;
257 vnet_buffer (p0)->ip.flow_hash =
258 ip6_compute_flow_hash (ip0, flow_hash_config0);
261 ASSERT (lb0->lb_n_buckets > 0);
262 ASSERT (is_pow2 (lb0->lb_n_buckets));
263 dpo0 = load_balance_get_bucket_i(lb0,
264 (vnet_buffer (p0)->ip.flow_hash &
265 lb0->lb_n_buckets_minus_1));
266 next0 = dpo0->dpoi_next_node;
267 /* Only process the HBH Option Header if explicitly configured to do so */
268 next0 = ((ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS) &&
270 (ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP :
273 vnet_buffer (p0)->ip.adj_index[VLIB_TX] = dpo0->dpoi_index;
275 vlib_increment_combined_counter
276 (cm, cpu_index, lbi0, 1,
277 vlib_buffer_length_in_chain (vm, p0));
284 if (PREDICT_FALSE (next0 != next))
287 vlib_put_next_frame (vm, node, next, n_left_to_next);
289 vlib_get_next_frame (vm, node, next,
290 to_next, n_left_to_next);
297 vlib_put_next_frame (vm, node, next, n_left_to_next);
300 if (node->flags & VLIB_NODE_FLAG_TRACE)
301 ip6_forward_next_trace(vm, node, frame, VLIB_TX);
303 return frame->n_vectors;
307 ip6_add_interface_routes (vnet_main_t * vnm, u32 sw_if_index,
308 ip6_main_t * im, u32 fib_index,
309 ip_interface_address_t * a)
311 ip_lookup_main_t * lm = &im->lookup_main;
312 ip6_address_t * address = ip_interface_address_get_address (lm, a);
314 .fp_len = a->address_length,
315 .fp_proto = FIB_PROTOCOL_IP6,
316 .fp_addr.ip6 = *address,
319 a->neighbor_probe_adj_index = ~0;
320 if (a->address_length < 128)
322 fib_node_index_t fei;
324 fei = fib_table_entry_update_one_path(fib_index,
326 FIB_SOURCE_INTERFACE,
327 (FIB_ENTRY_FLAG_CONNECTED |
328 FIB_ENTRY_FLAG_ATTACHED),
330 NULL, /* No next-hop address */
332 ~0, // invalid FIB index
335 FIB_ROUTE_PATH_FLAG_NONE);
336 a->neighbor_probe_adj_index = fib_entry_get_adj(fei);
340 if (sw_if_index < vec_len (lm->classify_table_index_by_sw_if_index))
342 u32 classify_table_index =
343 lm->classify_table_index_by_sw_if_index [sw_if_index];
344 if (classify_table_index != (u32) ~0)
346 dpo_id_t dpo = DPO_NULL;
351 classify_dpo_create(FIB_PROTOCOL_IP6,
352 classify_table_index));
354 fib_table_entry_special_dpo_add(fib_index,
363 fib_table_entry_update_one_path(fib_index,
365 FIB_SOURCE_INTERFACE,
366 (FIB_ENTRY_FLAG_CONNECTED |
367 FIB_ENTRY_FLAG_LOCAL),
371 ~0, // invalid FIB index
374 FIB_ROUTE_PATH_FLAG_NONE);
378 ip6_del_interface_routes (ip6_main_t * im,
380 ip6_address_t * address,
384 .fp_len = address_length,
385 .fp_proto = FIB_PROTOCOL_IP6,
386 .fp_addr.ip6 = *address,
389 if (pfx.fp_len < 128)
391 fib_table_entry_delete(fib_index,
393 FIB_SOURCE_INTERFACE);
398 fib_table_entry_delete(fib_index,
400 FIB_SOURCE_INTERFACE);
404 ip6_sw_interface_enable_disable (u32 sw_if_index,
407 vlib_main_t * vm = vlib_get_main();
408 ip6_main_t * im = &ip6_main;
409 ip_lookup_main_t * lm = &im->lookup_main;
411 u32 lookup_feature_index;
413 vec_validate_init_empty (im->ip_enabled_by_sw_if_index, sw_if_index, 0);
416 * enable/disable only on the 1<->0 transition
420 if (1 != ++im->ip_enabled_by_sw_if_index[sw_if_index])
425 ASSERT(im->ip_enabled_by_sw_if_index[sw_if_index] > 0);
426 if (0 != --im->ip_enabled_by_sw_if_index[sw_if_index])
430 for (cast = 0; cast <= VNET_IP_RX_MULTICAST_FEAT; cast++)
432 ip_config_main_t * cm = &lm->feature_config_mains[cast];
433 vnet_config_main_t * vcm = &cm->config_main;
435 vec_validate_init_empty (cm->config_index_by_sw_if_index, sw_if_index, ~0);
436 ci = cm->config_index_by_sw_if_index[sw_if_index];
438 if (cast == VNET_IP_RX_UNICAST_FEAT)
439 lookup_feature_index = im->ip6_unicast_rx_feature_lookup;
441 lookup_feature_index = im->ip6_multicast_rx_feature_lookup;
444 ci = vnet_config_add_feature (vm, vcm,
446 lookup_feature_index,
448 /* # bytes of config data */ 0);
450 ci = vnet_config_del_feature (vm, vcm,
452 lookup_feature_index,
454 /* # bytes of config data */ 0);
456 cm->config_index_by_sw_if_index[sw_if_index] = ci;
460 /* get first interface address */
462 ip6_interface_first_address (ip6_main_t * im,
464 ip_interface_address_t ** result_ia)
466 ip_lookup_main_t * lm = &im->lookup_main;
467 ip_interface_address_t * ia = 0;
468 ip6_address_t * result = 0;
470 foreach_ip_interface_address (lm, ia, sw_if_index,
471 1 /* honor unnumbered */,
473 ip6_address_t * a = ip_interface_address_get_address (lm, ia);
478 *result_ia = result ? ia : 0;
483 ip6_add_del_interface_address (vlib_main_t * vm,
485 ip6_address_t * address,
489 vnet_main_t * vnm = vnet_get_main();
490 ip6_main_t * im = &ip6_main;
491 ip_lookup_main_t * lm = &im->lookup_main;
492 clib_error_t * error;
493 u32 if_address_index;
494 ip6_address_fib_t ip6_af, * addr_fib = 0;
496 vec_validate (im->fib_index_by_sw_if_index, sw_if_index);
497 ip6_addr_fib_init (&ip6_af, address,
498 vec_elt (im->fib_index_by_sw_if_index, sw_if_index));
499 vec_add1 (addr_fib, ip6_af);
502 uword elts_before = pool_elts (lm->if_address_pool);
504 error = ip_interface_address_add_del
514 /* Pool did not grow: add duplicate address. */
515 if (elts_before == pool_elts (lm->if_address_pool))
520 ip6_del_interface_routes (im, ip6_af.fib_index, address,
523 ip6_add_interface_routes (vnm, sw_if_index,
524 im, ip6_af.fib_index,
525 pool_elt_at_index (lm->if_address_pool, if_address_index));
528 ip6_add_del_interface_address_callback_t * cb;
529 vec_foreach (cb, im->add_del_interface_address_callbacks)
530 cb->function (im, cb->function_opaque, sw_if_index,
531 address, address_length,
542 ip6_sw_interface_admin_up_down (vnet_main_t * vnm,
546 ip6_main_t * im = &ip6_main;
547 ip_interface_address_t * ia;
549 u32 is_admin_up, fib_index;
551 /* Fill in lookup tables with default table (0). */
552 vec_validate (im->fib_index_by_sw_if_index, sw_if_index);
554 vec_validate_init_empty (im->lookup_main.if_address_pool_index_by_sw_if_index, sw_if_index, ~0);
556 is_admin_up = (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) != 0;
558 fib_index = vec_elt (im->fib_index_by_sw_if_index, sw_if_index);
560 foreach_ip_interface_address (&im->lookup_main, ia, sw_if_index,
561 0 /* honor unnumbered */,
563 a = ip_interface_address_get_address (&im->lookup_main, ia);
565 ip6_add_interface_routes (vnm, sw_if_index,
569 ip6_del_interface_routes (im, fib_index,
570 a, ia->address_length);
576 VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION (ip6_sw_interface_admin_up_down);
578 /* Built-in ip6 unicast rx feature path definition */
579 VNET_IP6_UNICAST_FEATURE_INIT (ip6_flow_classify, static) = {
580 .node_name = "ip6-flow-classify",
581 .runs_before = ORDER_CONSTRAINTS {"ip6-inacl", 0},
582 .feature_index = &ip6_main.ip6_unicast_rx_feature_flow_classify,
585 VNET_IP6_UNICAST_FEATURE_INIT (ip6_inacl, static) = {
586 .node_name = "ip6-inacl",
587 .runs_before = ORDER_CONSTRAINTS {"ip6-policer-classify", 0},
588 .feature_index = &ip6_main.ip6_unicast_rx_feature_check_access,
591 VNET_IP6_UNICAST_FEATURE_INIT (ip6_policer_classify, static) = {
592 .node_name = "ip6-policer-classify",
593 .runs_before = ORDER_CONSTRAINTS {"ipsec-input-ip6", 0},
594 .feature_index = &ip6_main.ip6_unicast_rx_feature_policer_classify,
597 VNET_IP6_UNICAST_FEATURE_INIT (ip6_ipsec, static) = {
598 .node_name = "ipsec-input-ip6",
599 .runs_before = ORDER_CONSTRAINTS {"l2tp-decap", 0},
600 .feature_index = &ip6_main.ip6_unicast_rx_feature_ipsec,
603 VNET_IP6_UNICAST_FEATURE_INIT (ip6_l2tp, static) = {
604 .node_name = "l2tp-decap",
605 .runs_before = ORDER_CONSTRAINTS {"vpath-input-ip6", 0},
606 .feature_index = &ip6_main.ip6_unicast_rx_feature_l2tp_decap,
609 VNET_IP6_UNICAST_FEATURE_INIT (ip6_vpath, static) = {
610 .node_name = "vpath-input-ip6",
611 .runs_before = ORDER_CONSTRAINTS {"ip6-lookup", 0},
612 .feature_index = &ip6_main.ip6_unicast_rx_feature_vpath,
615 VNET_IP6_UNICAST_FEATURE_INIT (ip6_lookup, static) = {
616 .node_name = "ip6-lookup",
617 .runs_before = ORDER_CONSTRAINTS {"ip6-drop", 0},
618 .feature_index = &ip6_main.ip6_unicast_rx_feature_lookup,
621 VNET_IP6_UNICAST_FEATURE_INIT (ip6_drop, static) = {
622 .node_name = "ip6-drop",
623 .runs_before = 0, /*last feature*/
624 .feature_index = &ip6_main.ip6_unicast_rx_feature_drop,
627 /* Built-in ip6 multicast rx feature path definition (none now) */
628 VNET_IP6_MULTICAST_FEATURE_INIT (ip6_vpath_mc, static) = {
629 .node_name = "vpath-input-ip6",
630 .runs_before = ORDER_CONSTRAINTS {"ip6-lookup", 0},
631 .feature_index = &ip6_main.ip6_multicast_rx_feature_vpath,
634 VNET_IP6_MULTICAST_FEATURE_INIT (ip6_lookup, static) = {
635 .node_name = "ip6-lookup",
636 .runs_before = ORDER_CONSTRAINTS {"ip6-drop", 0},
637 .feature_index = &ip6_main.ip6_multicast_rx_feature_lookup,
640 VNET_IP6_MULTICAST_FEATURE_INIT (ip6_drop_mc, static) = {
641 .node_name = "ip6-drop",
642 .runs_before = 0, /* last feature */
643 .feature_index = &ip6_main.ip6_multicast_rx_feature_drop,
646 static char * rx_feature_start_nodes[] =
649 static char * tx_feature_start_nodes[] =
655 /* Built-in ip4 tx feature path definition */
656 VNET_IP6_TX_FEATURE_INIT (interface_output, static) = {
657 .node_name = "interface-output",
658 .runs_before = 0, /* not before any other features */
659 .feature_index = &ip6_main.ip6_tx_feature_interface_output,
662 static clib_error_t *
663 ip6_feature_init (vlib_main_t * vm, ip6_main_t * im)
665 ip_lookup_main_t * lm = &im->lookup_main;
666 clib_error_t * error;
668 ip_config_main_t * cm;
669 vnet_config_main_t * vcm;
670 char **feature_start_nodes;
671 int feature_start_len;
673 for (cast = 0; cast < VNET_N_IP_FEAT; cast++)
675 cm = &lm->feature_config_mains[cast];
676 vcm = &cm->config_main;
678 if (cast < VNET_IP_TX_FEAT)
680 feature_start_nodes = rx_feature_start_nodes;
681 feature_start_len = ARRAY_LEN(rx_feature_start_nodes);
685 feature_start_nodes = tx_feature_start_nodes;
686 feature_start_len = ARRAY_LEN(tx_feature_start_nodes);
689 if ((error = vnet_feature_arc_init (vm, vcm,
692 im->next_feature[cast],
693 &im->feature_nodes[cast])))
700 ip6_sw_interface_add_del (vnet_main_t * vnm,
704 vlib_main_t * vm = vnm->vlib_main;
705 ip6_main_t * im = &ip6_main;
706 ip_lookup_main_t * lm = &im->lookup_main;
710 for (cast = 0; cast < VNET_N_IP_FEAT; cast++)
712 ip_config_main_t * cm = &lm->feature_config_mains[cast];
713 vnet_config_main_t * vcm = &cm->config_main;
715 vec_validate_init_empty (cm->config_index_by_sw_if_index, sw_if_index, ~0);
716 ci = cm->config_index_by_sw_if_index[sw_if_index];
718 if (cast == VNET_IP_RX_UNICAST_FEAT)
719 feature_index = im->ip6_unicast_rx_feature_drop;
720 else if (cast == VNET_IP_RX_MULTICAST_FEAT)
721 feature_index = im->ip6_multicast_rx_feature_drop;
723 feature_index = im->ip6_tx_feature_interface_output;
726 ci = vnet_config_add_feature (vm, vcm,
730 /* # bytes of config data */ 0);
733 ci = vnet_config_del_feature (vm, vcm, ci,
736 /* # bytes of config data */ 0);
737 if (vec_len(im->ip_enabled_by_sw_if_index) > sw_if_index)
738 im->ip_enabled_by_sw_if_index[sw_if_index] = 0;
740 cm->config_index_by_sw_if_index[sw_if_index] = ci;
742 * note: do not update the tx feature count here.
745 return /* no error */ 0;
748 VNET_SW_INTERFACE_ADD_DEL_FUNCTION (ip6_sw_interface_add_del);
751 ip6_lookup (vlib_main_t * vm,
752 vlib_node_runtime_t * node,
753 vlib_frame_t * frame)
755 return ip6_lookup_inline (vm, node, frame);
758 static u8 * format_ip6_lookup_trace (u8 * s, va_list * args);
760 VLIB_REGISTER_NODE (ip6_lookup_node) = {
761 .function = ip6_lookup,
762 .name = "ip6-lookup",
763 .vector_size = sizeof (u32),
765 .format_trace = format_ip6_lookup_trace,
767 .n_next_nodes = IP6_LOOKUP_N_NEXT,
768 .next_nodes = IP6_LOOKUP_NEXT_NODES,
771 VLIB_NODE_FUNCTION_MULTIARCH (ip6_lookup_node, ip6_lookup)
774 ip6_load_balance (vlib_main_t * vm,
775 vlib_node_runtime_t * node,
776 vlib_frame_t * frame)
778 vlib_combined_counter_main_t * cm = &load_balance_main.lbm_via_counters;
779 u32 n_left_from, n_left_to_next, * from, * to_next;
780 ip_lookup_next_t next;
781 u32 cpu_index = os_get_cpu_number();
783 from = vlib_frame_vector_args (frame);
784 n_left_from = frame->n_vectors;
785 next = node->cached_next_index;
787 if (node->flags & VLIB_NODE_FLAG_TRACE)
788 ip6_forward_next_trace(vm, node, frame, VLIB_TX);
790 while (n_left_from > 0)
792 vlib_get_next_frame (vm, node, next,
793 to_next, n_left_to_next);
796 while (n_left_from > 0 && n_left_to_next > 0)
798 ip_lookup_next_t next0;
799 const load_balance_t *lb0;
802 const ip6_header_t *ip0;
803 const dpo_id_t *dpo0;
808 p0 = vlib_get_buffer (vm, pi0);
810 ip0 = vlib_buffer_get_current (p0);
811 lbi0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
813 lb0 = load_balance_get(lbi0);
814 hc0 = lb0->lb_hash_config;
815 vnet_buffer(p0)->ip.flow_hash = ip6_compute_flow_hash(ip0, hc0);
817 dpo0 = load_balance_get_bucket_i(lb0,
818 vnet_buffer(p0)->ip.flow_hash &
819 (lb0->lb_n_buckets - 1));
821 next0 = dpo0->dpoi_next_node;
822 vnet_buffer (p0)->ip.adj_index[VLIB_TX] = dpo0->dpoi_index;
824 vlib_increment_combined_counter
825 (cm, cpu_index, lbi0, 1,
826 vlib_buffer_length_in_chain (vm, p0));
833 if (PREDICT_FALSE (next0 != next))
836 vlib_put_next_frame (vm, node, next, n_left_to_next);
838 vlib_get_next_frame (vm, node, next,
839 to_next, n_left_to_next);
846 vlib_put_next_frame (vm, node, next, n_left_to_next);
849 return frame->n_vectors;
852 VLIB_REGISTER_NODE (ip6_load_balance_node) = {
853 .function = ip6_load_balance,
854 .name = "ip6-load-balance",
855 .vector_size = sizeof (u32),
856 .sibling_of = "ip6-lookup",
857 .format_trace = format_ip6_lookup_trace,
861 VLIB_NODE_FUNCTION_MULTIARCH (ip6_load_balance_node, ip6_load_balance)
864 /* Adjacency taken. */
869 /* Packet data, possibly *after* rewrite. */
870 u8 packet_data[128 - 1*sizeof(u32)];
871 } ip6_forward_next_trace_t;
873 static u8 * format_ip6_forward_next_trace (u8 * s, va_list * args)
875 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
876 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
877 ip6_forward_next_trace_t * t = va_arg (*args, ip6_forward_next_trace_t *);
878 uword indent = format_get_indent (s);
880 s = format(s, "%U%U",
881 format_white_space, indent,
882 format_ip6_header, t->packet_data, sizeof (t->packet_data));
886 static u8 * format_ip6_lookup_trace (u8 * s, va_list * args)
888 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
889 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
890 ip6_forward_next_trace_t * t = va_arg (*args, ip6_forward_next_trace_t *);
891 uword indent = format_get_indent (s);
893 s = format (s, "fib %d dpo-idx %d flow hash: 0x%08x",
894 t->fib_index, t->adj_index, t->flow_hash);
895 s = format(s, "\n%U%U",
896 format_white_space, indent,
897 format_ip6_header, t->packet_data, sizeof (t->packet_data));
902 static u8 * format_ip6_rewrite_trace (u8 * s, va_list * args)
904 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
905 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
906 ip6_forward_next_trace_t * t = va_arg (*args, ip6_forward_next_trace_t *);
907 vnet_main_t * vnm = vnet_get_main();
908 uword indent = format_get_indent (s);
910 s = format (s, "tx_sw_if_index %d adj-idx %d : %U flow hash: 0x%08x",
911 t->fib_index, t->adj_index, format_ip_adjacency,
912 vnm, t->adj_index, FORMAT_IP_ADJACENCY_NONE,
914 s = format (s, "\n%U%U",
915 format_white_space, indent,
916 format_ip_adjacency_packet_data,
918 t->packet_data, sizeof (t->packet_data));
922 /* Common trace function for all ip6-forward next nodes. */
924 ip6_forward_next_trace (vlib_main_t * vm,
925 vlib_node_runtime_t * node,
926 vlib_frame_t * frame,
927 vlib_rx_or_tx_t which_adj_index)
930 ip6_main_t * im = &ip6_main;
932 n_left = frame->n_vectors;
933 from = vlib_frame_vector_args (frame);
938 vlib_buffer_t * b0, * b1;
939 ip6_forward_next_trace_t * t0, * t1;
941 /* Prefetch next iteration. */
942 vlib_prefetch_buffer_with_index (vm, from[2], LOAD);
943 vlib_prefetch_buffer_with_index (vm, from[3], LOAD);
948 b0 = vlib_get_buffer (vm, bi0);
949 b1 = vlib_get_buffer (vm, bi1);
951 if (b0->flags & VLIB_BUFFER_IS_TRACED)
953 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
954 t0->adj_index = vnet_buffer (b0)->ip.adj_index[which_adj_index];
955 t0->flow_hash = vnet_buffer (b0)->ip.flow_hash;
956 t0->fib_index = (vnet_buffer(b0)->sw_if_index[VLIB_TX] != (u32)~0) ?
957 vnet_buffer(b0)->sw_if_index[VLIB_TX] :
958 vec_elt (im->fib_index_by_sw_if_index,
959 vnet_buffer(b0)->sw_if_index[VLIB_RX]);
961 clib_memcpy (t0->packet_data,
962 vlib_buffer_get_current (b0),
963 sizeof (t0->packet_data));
965 if (b1->flags & VLIB_BUFFER_IS_TRACED)
967 t1 = vlib_add_trace (vm, node, b1, sizeof (t1[0]));
968 t1->adj_index = vnet_buffer (b1)->ip.adj_index[which_adj_index];
969 t1->flow_hash = vnet_buffer (b1)->ip.flow_hash;
970 t1->fib_index = (vnet_buffer(b1)->sw_if_index[VLIB_TX] != (u32)~0) ?
971 vnet_buffer(b1)->sw_if_index[VLIB_TX] :
972 vec_elt (im->fib_index_by_sw_if_index,
973 vnet_buffer(b1)->sw_if_index[VLIB_RX]);
975 clib_memcpy (t1->packet_data,
976 vlib_buffer_get_current (b1),
977 sizeof (t1->packet_data));
987 ip6_forward_next_trace_t * t0;
991 b0 = vlib_get_buffer (vm, bi0);
993 if (b0->flags & VLIB_BUFFER_IS_TRACED)
995 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
996 t0->adj_index = vnet_buffer (b0)->ip.adj_index[which_adj_index];
997 t0->flow_hash = vnet_buffer (b0)->ip.flow_hash;
998 t0->fib_index = (vnet_buffer(b0)->sw_if_index[VLIB_TX] != (u32)~0) ?
999 vnet_buffer(b0)->sw_if_index[VLIB_TX] :
1000 vec_elt (im->fib_index_by_sw_if_index,
1001 vnet_buffer(b0)->sw_if_index[VLIB_RX]);
1003 clib_memcpy (t0->packet_data,
1004 vlib_buffer_get_current (b0),
1005 sizeof (t0->packet_data));
1013 ip6_drop_or_punt (vlib_main_t * vm,
1014 vlib_node_runtime_t * node,
1015 vlib_frame_t * frame,
1016 ip6_error_t error_code)
1018 u32 * buffers = vlib_frame_vector_args (frame);
1019 uword n_packets = frame->n_vectors;
1021 vlib_error_drop_buffers (vm, node,
1026 ip6_input_node.index,
1029 if (node->flags & VLIB_NODE_FLAG_TRACE)
1030 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
1036 ip6_drop (vlib_main_t * vm,
1037 vlib_node_runtime_t * node,
1038 vlib_frame_t * frame)
1039 { return ip6_drop_or_punt (vm, node, frame, IP6_ERROR_ADJACENCY_DROP); }
1042 ip6_punt (vlib_main_t * vm,
1043 vlib_node_runtime_t * node,
1044 vlib_frame_t * frame)
1045 { return ip6_drop_or_punt (vm, node, frame, IP6_ERROR_ADJACENCY_PUNT); }
1047 VLIB_REGISTER_NODE (ip6_drop_node,static) = {
1048 .function = ip6_drop,
1050 .vector_size = sizeof (u32),
1052 .format_trace = format_ip6_forward_next_trace,
1060 VLIB_NODE_FUNCTION_MULTIARCH (ip6_drop_node, ip6_drop)
1062 VLIB_REGISTER_NODE (ip6_punt_node,static) = {
1063 .function = ip6_punt,
1065 .vector_size = sizeof (u32),
1067 .format_trace = format_ip6_forward_next_trace,
1075 VLIB_NODE_FUNCTION_MULTIARCH (ip6_punt_node, ip6_punt)
1077 VLIB_REGISTER_NODE (ip6_multicast_node,static) = {
1078 .function = ip6_drop,
1079 .name = "ip6-multicast",
1080 .vector_size = sizeof (u32),
1082 .format_trace = format_ip6_forward_next_trace,
1090 /* Compute TCP/UDP/ICMP6 checksum in software. */
1091 u16 ip6_tcp_udp_icmp_compute_checksum (vlib_main_t * vm, vlib_buffer_t * p0, ip6_header_t * ip0, int *bogus_lengthp)
1094 u16 sum16, payload_length_host_byte_order;
1095 u32 i, n_this_buffer, n_bytes_left;
1096 u32 headers_size = sizeof(ip0[0]);
1097 void * data_this_buffer;
1099 ASSERT(bogus_lengthp);
1102 /* Initialize checksum with ip header. */
1103 sum0 = ip0->payload_length + clib_host_to_net_u16 (ip0->protocol);
1104 payload_length_host_byte_order = clib_net_to_host_u16 (ip0->payload_length);
1105 data_this_buffer = (void *) (ip0 + 1);
1107 for (i = 0; i < ARRAY_LEN (ip0->src_address.as_uword); i++)
1109 sum0 = ip_csum_with_carry (sum0,
1110 clib_mem_unaligned (&ip0->src_address.as_uword[i], uword));
1111 sum0 = ip_csum_with_carry (sum0,
1112 clib_mem_unaligned (&ip0->dst_address.as_uword[i], uword));
1115 /* some icmp packets may come with a "router alert" hop-by-hop extension header (e.g., mldv2 packets) */
1116 if (PREDICT_FALSE (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
1119 ip6_hop_by_hop_ext_t *ext_hdr = (ip6_hop_by_hop_ext_t *)data_this_buffer;
1121 /* validate really icmp6 next */
1122 ASSERT(ext_hdr->next_hdr == IP_PROTOCOL_ICMP6);
1124 skip_bytes = 8* (1 + ext_hdr->n_data_u64s);
1125 data_this_buffer = (void *)((u8 *)data_this_buffer + skip_bytes);
1127 payload_length_host_byte_order -= skip_bytes;
1128 headers_size += skip_bytes;
1131 n_bytes_left = n_this_buffer = payload_length_host_byte_order;
1133 if (p0 && n_this_buffer + headers_size > p0->current_length)
1135 struct rte_mbuf *mb = rte_mbuf_from_vlib_buffer(p0);
1136 u8 nb_segs = mb->nb_segs;
1138 n_this_buffer = (p0->current_length > headers_size ?
1139 p0->current_length - headers_size : 0);
1140 while (n_bytes_left)
1142 sum0 = ip_incremental_checksum (sum0, data_this_buffer, n_this_buffer);
1143 n_bytes_left -= n_this_buffer;
1147 if ((nb_segs == 0) || (mb == 0))
1150 data_this_buffer = rte_ctrlmbuf_data(mb);
1151 n_this_buffer = mb->data_len;
1153 if (n_bytes_left || nb_segs)
1159 else sum0 = ip_incremental_checksum (sum0, data_this_buffer, n_this_buffer);
1161 if (p0 && n_this_buffer + headers_size > p0->current_length)
1162 n_this_buffer = p0->current_length > headers_size ? p0->current_length - headers_size : 0;
1165 sum0 = ip_incremental_checksum (sum0, data_this_buffer, n_this_buffer);
1166 n_bytes_left -= n_this_buffer;
1167 if (n_bytes_left == 0)
1170 if (!(p0->flags & VLIB_BUFFER_NEXT_PRESENT))
1175 p0 = vlib_get_buffer (vm, p0->next_buffer);
1176 data_this_buffer = vlib_buffer_get_current (p0);
1177 n_this_buffer = p0->current_length;
1181 sum16 = ~ ip_csum_fold (sum0);
1186 u32 ip6_tcp_udp_icmp_validate_checksum (vlib_main_t * vm, vlib_buffer_t * p0)
1188 ip6_header_t * ip0 = vlib_buffer_get_current (p0);
1189 udp_header_t * udp0;
1193 /* some icmp packets may come with a "router alert" hop-by-hop extension header (e.g., mldv2 packets) */
1194 ASSERT (ip0->protocol == IP_PROTOCOL_TCP
1195 || ip0->protocol == IP_PROTOCOL_ICMP6
1196 || ip0->protocol == IP_PROTOCOL_UDP
1197 || ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS);
1199 udp0 = (void *) (ip0 + 1);
1200 if (ip0->protocol == IP_PROTOCOL_UDP && udp0->checksum == 0)
1202 p0->flags |= (IP_BUFFER_L4_CHECKSUM_COMPUTED
1203 | IP_BUFFER_L4_CHECKSUM_CORRECT);
1207 sum16 = ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip0, &bogus_length);
1209 p0->flags |= (IP_BUFFER_L4_CHECKSUM_COMPUTED
1210 | ((sum16 == 0) << LOG2_IP_BUFFER_L4_CHECKSUM_CORRECT));
1216 ip6_local (vlib_main_t * vm,
1217 vlib_node_runtime_t * node,
1218 vlib_frame_t * frame)
1220 ip6_main_t * im = &ip6_main;
1221 ip_lookup_main_t * lm = &im->lookup_main;
1222 ip_local_next_t next_index;
1223 u32 * from, * to_next, n_left_from, n_left_to_next;
1224 vlib_node_runtime_t * error_node = vlib_node_get_runtime (vm, ip6_input_node.index);
1226 from = vlib_frame_vector_args (frame);
1227 n_left_from = frame->n_vectors;
1228 next_index = node->cached_next_index;
1230 if (node->flags & VLIB_NODE_FLAG_TRACE)
1231 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
1233 while (n_left_from > 0)
1235 vlib_get_next_frame (vm, node, next_index,
1236 to_next, n_left_to_next);
1238 while (n_left_from >= 4 && n_left_to_next >= 2)
1240 vlib_buffer_t * p0, * p1;
1241 ip6_header_t * ip0, * ip1;
1242 udp_header_t * udp0, * udp1;
1243 u32 pi0, ip_len0, udp_len0, flags0, next0;
1244 u32 pi1, ip_len1, udp_len1, flags1, next1;
1245 i32 len_diff0, len_diff1;
1246 u8 error0, type0, good_l4_checksum0;
1247 u8 error1, type1, good_l4_checksum1;
1249 pi0 = to_next[0] = from[0];
1250 pi1 = to_next[1] = from[1];
1254 n_left_to_next -= 2;
1256 p0 = vlib_get_buffer (vm, pi0);
1257 p1 = vlib_get_buffer (vm, pi1);
1259 ip0 = vlib_buffer_get_current (p0);
1260 ip1 = vlib_buffer_get_current (p1);
1262 type0 = lm->builtin_protocol_by_ip_protocol[ip0->protocol];
1263 type1 = lm->builtin_protocol_by_ip_protocol[ip1->protocol];
1265 next0 = lm->local_next_by_ip_protocol[ip0->protocol];
1266 next1 = lm->local_next_by_ip_protocol[ip1->protocol];
1271 good_l4_checksum0 = (flags0 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0;
1272 good_l4_checksum1 = (flags1 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0;
1274 udp0 = ip6_next_header (ip0);
1275 udp1 = ip6_next_header (ip1);
1277 /* Don't verify UDP checksum for packets with explicit zero checksum. */
1278 good_l4_checksum0 |= type0 == IP_BUILTIN_PROTOCOL_UDP && udp0->checksum == 0;
1279 good_l4_checksum1 |= type1 == IP_BUILTIN_PROTOCOL_UDP && udp1->checksum == 0;
1281 good_l4_checksum0 |= type0 == IP_BUILTIN_PROTOCOL_UNKNOWN;
1282 good_l4_checksum1 |= type1 == IP_BUILTIN_PROTOCOL_UNKNOWN;
1284 /* Verify UDP length. */
1285 ip_len0 = clib_net_to_host_u16 (ip0->payload_length);
1286 ip_len1 = clib_net_to_host_u16 (ip1->payload_length);
1287 udp_len0 = clib_net_to_host_u16 (udp0->length);
1288 udp_len1 = clib_net_to_host_u16 (udp1->length);
1290 len_diff0 = ip_len0 - udp_len0;
1291 len_diff1 = ip_len1 - udp_len1;
1293 len_diff0 = type0 == IP_BUILTIN_PROTOCOL_UDP ? len_diff0 : 0;
1294 len_diff1 = type1 == IP_BUILTIN_PROTOCOL_UDP ? len_diff1 : 0;
1296 if (PREDICT_FALSE (type0 != IP_BUILTIN_PROTOCOL_UNKNOWN
1297 && ! good_l4_checksum0
1298 && ! (flags0 & IP_BUFFER_L4_CHECKSUM_COMPUTED)))
1300 flags0 = ip6_tcp_udp_icmp_validate_checksum (vm, p0);
1302 (flags0 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0;
1304 if (PREDICT_FALSE (type1 != IP_BUILTIN_PROTOCOL_UNKNOWN
1305 && ! good_l4_checksum1
1306 && ! (flags1 & IP_BUFFER_L4_CHECKSUM_COMPUTED)))
1308 flags1 = ip6_tcp_udp_icmp_validate_checksum (vm, p1);
1310 (flags1 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0;
1313 error0 = error1 = IP6_ERROR_UNKNOWN_PROTOCOL;
1315 error0 = len_diff0 < 0 ? IP6_ERROR_UDP_LENGTH : error0;
1316 error1 = len_diff1 < 0 ? IP6_ERROR_UDP_LENGTH : error1;
1318 ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_UDP == IP6_ERROR_UDP_CHECKSUM);
1319 ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_ICMP == IP6_ERROR_ICMP_CHECKSUM);
1320 error0 = (! good_l4_checksum0
1321 ? IP6_ERROR_UDP_CHECKSUM + type0
1323 error1 = (! good_l4_checksum1
1324 ? IP6_ERROR_UDP_CHECKSUM + type1
1327 /* Drop packets from unroutable hosts. */
1328 /* If this is a neighbor solicitation (ICMP), skip source RPF check */
1329 if (error0 == IP6_ERROR_UNKNOWN_PROTOCOL &&
1330 type0 != IP_BUILTIN_PROTOCOL_ICMP &&
1331 !ip6_address_is_link_local_unicast(&ip0->src_address))
1333 u32 src_adj_index0 = ip6_src_lookup_for_packet (im, p0, ip0);
1334 error0 = (ADJ_INDEX_INVALID == src_adj_index0
1335 ? IP6_ERROR_SRC_LOOKUP_MISS
1338 if (error1 == IP6_ERROR_UNKNOWN_PROTOCOL &&
1339 type1 != IP_BUILTIN_PROTOCOL_ICMP &&
1340 !ip6_address_is_link_local_unicast(&ip1->src_address))
1342 u32 src_adj_index1 = ip6_src_lookup_for_packet (im, p1, ip1);
1343 error1 = (ADJ_INDEX_INVALID == src_adj_index1
1344 ? IP6_ERROR_SRC_LOOKUP_MISS
1348 next0 = error0 != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next0;
1349 next1 = error1 != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next1;
1351 p0->error = error_node->errors[error0];
1352 p1->error = error_node->errors[error1];
1354 vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
1355 to_next, n_left_to_next,
1356 pi0, pi1, next0, next1);
1359 while (n_left_from > 0 && n_left_to_next > 0)
1363 udp_header_t * udp0;
1364 u32 pi0, ip_len0, udp_len0, flags0, next0;
1366 u8 error0, type0, good_l4_checksum0;
1368 pi0 = to_next[0] = from[0];
1372 n_left_to_next -= 1;
1374 p0 = vlib_get_buffer (vm, pi0);
1376 ip0 = vlib_buffer_get_current (p0);
1378 type0 = lm->builtin_protocol_by_ip_protocol[ip0->protocol];
1379 next0 = lm->local_next_by_ip_protocol[ip0->protocol];
1383 good_l4_checksum0 = (flags0 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0;
1385 udp0 = ip6_next_header (ip0);
1387 /* Don't verify UDP checksum for packets with explicit zero checksum. */
1388 good_l4_checksum0 |= type0 == IP_BUILTIN_PROTOCOL_UDP && udp0->checksum == 0;
1390 good_l4_checksum0 |= type0 == IP_BUILTIN_PROTOCOL_UNKNOWN;
1392 /* Verify UDP length. */
1393 ip_len0 = clib_net_to_host_u16 (ip0->payload_length);
1394 udp_len0 = clib_net_to_host_u16 (udp0->length);
1396 len_diff0 = ip_len0 - udp_len0;
1398 len_diff0 = type0 == IP_BUILTIN_PROTOCOL_UDP ? len_diff0 : 0;
1400 if (PREDICT_FALSE (type0 != IP_BUILTIN_PROTOCOL_UNKNOWN
1401 && ! good_l4_checksum0
1402 && ! (flags0 & IP_BUFFER_L4_CHECKSUM_COMPUTED)))
1404 flags0 = ip6_tcp_udp_icmp_validate_checksum (vm, p0);
1406 (flags0 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0;
1409 error0 = IP6_ERROR_UNKNOWN_PROTOCOL;
1411 error0 = len_diff0 < 0 ? IP6_ERROR_UDP_LENGTH : error0;
1413 ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_UDP == IP6_ERROR_UDP_CHECKSUM);
1414 ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_ICMP == IP6_ERROR_ICMP_CHECKSUM);
1415 error0 = (! good_l4_checksum0
1416 ? IP6_ERROR_UDP_CHECKSUM + type0
1419 /* If this is a neighbor solicitation (ICMP), skip source RPF check */
1420 if (error0 == IP6_ERROR_UNKNOWN_PROTOCOL &&
1421 type0 != IP_BUILTIN_PROTOCOL_ICMP &&
1422 !ip6_address_is_link_local_unicast(&ip0->src_address))
1424 u32 src_adj_index0 = ip6_src_lookup_for_packet (im, p0, ip0);
1425 error0 = (ADJ_INDEX_INVALID == src_adj_index0
1426 ? IP6_ERROR_SRC_LOOKUP_MISS
1430 next0 = error0 != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next0;
1432 p0->error = error_node->errors[error0];
1434 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1435 to_next, n_left_to_next,
1439 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1442 return frame->n_vectors;
1445 VLIB_REGISTER_NODE (ip6_local_node,static) = {
1446 .function = ip6_local,
1447 .name = "ip6-local",
1448 .vector_size = sizeof (u32),
1450 .format_trace = format_ip6_forward_next_trace,
1452 .n_next_nodes = IP_LOCAL_N_NEXT,
1454 [IP_LOCAL_NEXT_DROP] = "error-drop",
1455 [IP_LOCAL_NEXT_PUNT] = "error-punt",
1456 [IP_LOCAL_NEXT_UDP_LOOKUP] = "ip6-udp-lookup",
1457 [IP_LOCAL_NEXT_ICMP] = "ip6-icmp-input",
1461 VLIB_NODE_FUNCTION_MULTIARCH (ip6_local_node, ip6_local)
1463 void ip6_register_protocol (u32 protocol, u32 node_index)
1465 vlib_main_t * vm = vlib_get_main();
1466 ip6_main_t * im = &ip6_main;
1467 ip_lookup_main_t * lm = &im->lookup_main;
1469 ASSERT (protocol < ARRAY_LEN (lm->local_next_by_ip_protocol));
1470 lm->local_next_by_ip_protocol[protocol] = vlib_node_add_next (vm, ip6_local_node.index, node_index);
1474 IP6_DISCOVER_NEIGHBOR_NEXT_DROP,
1475 IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX,
1476 IP6_DISCOVER_NEIGHBOR_N_NEXT,
1477 } ip6_discover_neighbor_next_t;
1480 IP6_DISCOVER_NEIGHBOR_ERROR_DROP,
1481 IP6_DISCOVER_NEIGHBOR_ERROR_REQUEST_SENT,
1482 IP6_DISCOVER_NEIGHBOR_ERROR_NO_SOURCE_ADDRESS,
1483 } ip6_discover_neighbor_error_t;
1486 ip6_discover_neighbor_inline (vlib_main_t * vm,
1487 vlib_node_runtime_t * node,
1488 vlib_frame_t * frame,
1491 vnet_main_t * vnm = vnet_get_main();
1492 ip6_main_t * im = &ip6_main;
1493 ip_lookup_main_t * lm = &im->lookup_main;
1494 u32 * from, * to_next_drop;
1495 uword n_left_from, n_left_to_next_drop;
1496 static f64 time_last_seed_change = -1e100;
1497 static u32 hash_seeds[3];
1498 static uword hash_bitmap[256 / BITS (uword)];
1502 if (node->flags & VLIB_NODE_FLAG_TRACE)
1503 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
1505 time_now = vlib_time_now (vm);
1506 if (time_now - time_last_seed_change > 1e-3)
1509 u32 * r = clib_random_buffer_get_data (&vm->random_buffer,
1510 sizeof (hash_seeds));
1511 for (i = 0; i < ARRAY_LEN (hash_seeds); i++)
1512 hash_seeds[i] = r[i];
1514 /* Mark all hash keys as been not-seen before. */
1515 for (i = 0; i < ARRAY_LEN (hash_bitmap); i++)
1518 time_last_seed_change = time_now;
1521 from = vlib_frame_vector_args (frame);
1522 n_left_from = frame->n_vectors;
1524 while (n_left_from > 0)
1526 vlib_get_next_frame (vm, node, IP6_DISCOVER_NEIGHBOR_NEXT_DROP,
1527 to_next_drop, n_left_to_next_drop);
1529 while (n_left_from > 0 && n_left_to_next_drop > 0)
1533 u32 pi0, adj_index0, a0, b0, c0, m0, sw_if_index0, drop0;
1535 ip_adjacency_t * adj0;
1536 vnet_hw_interface_t * hw_if0;
1541 p0 = vlib_get_buffer (vm, pi0);
1543 adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
1545 ip0 = vlib_buffer_get_current (p0);
1547 adj0 = ip_get_adjacency (lm, adj_index0);
1551 ip0->dst_address.as_u64[0] = adj0->sub_type.nbr.next_hop.ip6.as_u64[0];
1552 ip0->dst_address.as_u64[1] = adj0->sub_type.nbr.next_hop.ip6.as_u64[1];
1559 sw_if_index0 = adj0->rewrite_header.sw_if_index;
1560 vnet_buffer (p0)->sw_if_index[VLIB_TX] = sw_if_index0;
1563 b0 ^= ip0->dst_address.as_u32[0];
1564 c0 ^= ip0->dst_address.as_u32[1];
1566 hash_v3_mix32 (a0, b0, c0);
1568 b0 ^= ip0->dst_address.as_u32[2];
1569 c0 ^= ip0->dst_address.as_u32[3];
1571 hash_v3_finalize32 (a0, b0, c0);
1573 c0 &= BITS (hash_bitmap) - 1;
1574 c0 = c0 / BITS (uword);
1575 m0 = (uword) 1 << (c0 % BITS (uword));
1577 bm0 = hash_bitmap[c0];
1578 drop0 = (bm0 & m0) != 0;
1580 /* Mark it as seen. */
1581 hash_bitmap[c0] = bm0 | m0;
1585 to_next_drop[0] = pi0;
1587 n_left_to_next_drop -= 1;
1589 hw_if0 = vnet_get_sup_hw_interface (vnm, sw_if_index0);
1591 /* If the interface is link-down, drop the pkt */
1592 if (!(hw_if0->flags & VNET_HW_INTERFACE_FLAG_LINK_UP))
1596 node->errors[drop0 ? IP6_DISCOVER_NEIGHBOR_ERROR_DROP
1597 : IP6_DISCOVER_NEIGHBOR_ERROR_REQUEST_SENT];
1603 icmp6_neighbor_solicitation_header_t * h0;
1606 h0 = vlib_packet_template_get_packet
1607 (vm, &im->discover_neighbor_packet_template, &bi0);
1610 * Build ethernet header.
1611 * Choose source address based on destination lookup
1614 if (ip6_src_address_for_packet (lm,
1616 &h0->ip.src_address))
1618 /* There is no address on the interface */
1619 p0->error = node->errors[IP6_DISCOVER_NEIGHBOR_ERROR_NO_SOURCE_ADDRESS];
1620 vlib_buffer_free(vm, &bi0, 1);
1625 * Destination address is a solicited node multicast address.
1626 * We need to fill in
1627 * the low 24 bits with low 24 bits of target's address.
1629 h0->ip.dst_address.as_u8[13] = ip0->dst_address.as_u8[13];
1630 h0->ip.dst_address.as_u8[14] = ip0->dst_address.as_u8[14];
1631 h0->ip.dst_address.as_u8[15] = ip0->dst_address.as_u8[15];
1633 h0->neighbor.target_address = ip0->dst_address;
1635 clib_memcpy (h0->link_layer_option.ethernet_address,
1636 hw_if0->hw_address, vec_len (hw_if0->hw_address));
1638 /* $$$$ appears we need this; why is the checksum non-zero? */
1639 h0->neighbor.icmp.checksum = 0;
1640 h0->neighbor.icmp.checksum =
1641 ip6_tcp_udp_icmp_compute_checksum (vm, 0, &h0->ip,
1644 ASSERT (bogus_length == 0);
1646 vlib_buffer_copy_trace_flag (vm, p0, bi0);
1647 b0 = vlib_get_buffer (vm, bi0);
1648 vnet_buffer (b0)->sw_if_index[VLIB_TX]
1649 = vnet_buffer (p0)->sw_if_index[VLIB_TX];
1651 /* Add rewrite/encap string. */
1652 vnet_rewrite_one_header (adj0[0], h0,
1653 sizeof (ethernet_header_t));
1654 vlib_buffer_advance (b0, -adj0->rewrite_header.data_bytes);
1656 next0 = IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX;
1658 vlib_set_next_frame_buffer (vm, node, next0, bi0);
1662 vlib_put_next_frame (vm, node, IP6_DISCOVER_NEIGHBOR_NEXT_DROP,
1663 n_left_to_next_drop);
1666 return frame->n_vectors;
1670 ip6_discover_neighbor (vlib_main_t * vm,
1671 vlib_node_runtime_t * node,
1672 vlib_frame_t * frame)
1674 return (ip6_discover_neighbor_inline(vm, node, frame, 0));
1678 ip6_glean (vlib_main_t * vm,
1679 vlib_node_runtime_t * node,
1680 vlib_frame_t * frame)
1682 return (ip6_discover_neighbor_inline(vm, node, frame, 1));
1685 static char * ip6_discover_neighbor_error_strings[] = {
1686 [IP6_DISCOVER_NEIGHBOR_ERROR_DROP] = "address overflow drops",
1687 [IP6_DISCOVER_NEIGHBOR_ERROR_REQUEST_SENT]
1688 = "neighbor solicitations sent",
1689 [IP6_DISCOVER_NEIGHBOR_ERROR_NO_SOURCE_ADDRESS]
1690 = "no source address for ND solicitation",
1693 VLIB_REGISTER_NODE (ip6_discover_neighbor_node) = {
1694 .function = ip6_discover_neighbor,
1695 .name = "ip6-discover-neighbor",
1696 .vector_size = sizeof (u32),
1698 .format_trace = format_ip6_forward_next_trace,
1700 .n_errors = ARRAY_LEN (ip6_discover_neighbor_error_strings),
1701 .error_strings = ip6_discover_neighbor_error_strings,
1703 .n_next_nodes = IP6_DISCOVER_NEIGHBOR_N_NEXT,
1705 [IP6_DISCOVER_NEIGHBOR_NEXT_DROP] = "error-drop",
1706 [IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX] = "interface-output",
1710 VLIB_REGISTER_NODE (ip6_glean_node) = {
1711 .function = ip6_glean,
1712 .name = "ip6-glean",
1713 .vector_size = sizeof (u32),
1715 .format_trace = format_ip6_forward_next_trace,
1717 .n_errors = ARRAY_LEN (ip6_discover_neighbor_error_strings),
1718 .error_strings = ip6_discover_neighbor_error_strings,
1720 .n_next_nodes = IP6_DISCOVER_NEIGHBOR_N_NEXT,
1722 [IP6_DISCOVER_NEIGHBOR_NEXT_DROP] = "error-drop",
1723 [IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX] = "interface-output",
1728 ip6_probe_neighbor (vlib_main_t * vm, ip6_address_t * dst, u32 sw_if_index)
1730 vnet_main_t * vnm = vnet_get_main();
1731 ip6_main_t * im = &ip6_main;
1732 icmp6_neighbor_solicitation_header_t * h;
1733 ip6_address_t * src;
1734 ip_interface_address_t * ia;
1735 ip_adjacency_t * adj;
1736 vnet_hw_interface_t * hi;
1737 vnet_sw_interface_t * si;
1742 si = vnet_get_sw_interface (vnm, sw_if_index);
1744 if (!(si->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP))
1746 return clib_error_return (0, "%U: interface %U down",
1747 format_ip6_address, dst,
1748 format_vnet_sw_if_index_name, vnm,
1752 src = ip6_interface_address_matching_destination (im, dst, sw_if_index, &ia);
1755 vnm->api_errno = VNET_API_ERROR_NO_MATCHING_INTERFACE;
1756 return clib_error_return
1757 (0, "no matching interface address for destination %U (interface %U)",
1758 format_ip6_address, dst,
1759 format_vnet_sw_if_index_name, vnm, sw_if_index);
1762 h = vlib_packet_template_get_packet (vm, &im->discover_neighbor_packet_template, &bi);
1764 hi = vnet_get_sup_hw_interface (vnm, sw_if_index);
1766 /* Destination address is a solicited node multicast address. We need to fill in
1767 the low 24 bits with low 24 bits of target's address. */
1768 h->ip.dst_address.as_u8[13] = dst->as_u8[13];
1769 h->ip.dst_address.as_u8[14] = dst->as_u8[14];
1770 h->ip.dst_address.as_u8[15] = dst->as_u8[15];
1772 h->ip.src_address = src[0];
1773 h->neighbor.target_address = dst[0];
1775 clib_memcpy (h->link_layer_option.ethernet_address, hi->hw_address, vec_len (hi->hw_address));
1777 h->neighbor.icmp.checksum =
1778 ip6_tcp_udp_icmp_compute_checksum (vm, 0, &h->ip, &bogus_length);
1779 ASSERT(bogus_length == 0);
1781 b = vlib_get_buffer (vm, bi);
1782 vnet_buffer (b)->sw_if_index[VLIB_RX] = vnet_buffer (b)->sw_if_index[VLIB_TX] = sw_if_index;
1784 /* Add encapsulation string for software interface (e.g. ethernet header). */
1785 adj = ip_get_adjacency (&im->lookup_main, ia->neighbor_probe_adj_index);
1786 vnet_rewrite_one_header (adj[0], h, sizeof (ethernet_header_t));
1787 vlib_buffer_advance (b, -adj->rewrite_header.data_bytes);
1790 vlib_frame_t * f = vlib_get_frame_to_node (vm, hi->output_node_index);
1791 u32 * to_next = vlib_frame_vector_args (f);
1794 vlib_put_frame_to_node (vm, hi->output_node_index, f);
1797 return /* no error */ 0;
1801 IP6_REWRITE_NEXT_DROP,
1802 IP6_REWRITE_NEXT_ICMP_ERROR,
1803 } ip6_rewrite_next_t;
1806 ip6_rewrite_inline (vlib_main_t * vm,
1807 vlib_node_runtime_t * node,
1808 vlib_frame_t * frame,
1809 int rewrite_for_locally_received_packets,
1812 ip_lookup_main_t * lm = &ip6_main.lookup_main;
1813 u32 * from = vlib_frame_vector_args (frame);
1814 u32 n_left_from, n_left_to_next, * to_next, next_index;
1815 vlib_node_runtime_t * error_node = vlib_node_get_runtime (vm, ip6_input_node.index);
1816 vlib_rx_or_tx_t adj_rx_tx = rewrite_for_locally_received_packets ? VLIB_RX : VLIB_TX;
1817 ip_config_main_t * cm = &lm->feature_config_mains[VNET_IP_TX_FEAT];
1819 n_left_from = frame->n_vectors;
1820 next_index = node->cached_next_index;
1821 u32 cpu_index = os_get_cpu_number();
1823 while (n_left_from > 0)
1825 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1827 while (n_left_from >= 4 && n_left_to_next >= 2)
1829 ip_adjacency_t * adj0, * adj1;
1830 vlib_buffer_t * p0, * p1;
1831 ip6_header_t * ip0, * ip1;
1832 u32 pi0, rw_len0, next0, error0, adj_index0;
1833 u32 pi1, rw_len1, next1, error1, adj_index1;
1834 u32 tx_sw_if_index0, tx_sw_if_index1;
1836 /* Prefetch next iteration. */
1838 vlib_buffer_t * p2, * p3;
1840 p2 = vlib_get_buffer (vm, from[2]);
1841 p3 = vlib_get_buffer (vm, from[3]);
1843 vlib_prefetch_buffer_header (p2, LOAD);
1844 vlib_prefetch_buffer_header (p3, LOAD);
1846 CLIB_PREFETCH (p2->pre_data, 32, STORE);
1847 CLIB_PREFETCH (p3->pre_data, 32, STORE);
1849 CLIB_PREFETCH (p2->data, sizeof (ip0[0]), STORE);
1850 CLIB_PREFETCH (p3->data, sizeof (ip0[0]), STORE);
1853 pi0 = to_next[0] = from[0];
1854 pi1 = to_next[1] = from[1];
1859 n_left_to_next -= 2;
1861 p0 = vlib_get_buffer (vm, pi0);
1862 p1 = vlib_get_buffer (vm, pi1);
1864 adj_index0 = vnet_buffer (p0)->ip.adj_index[adj_rx_tx];
1865 adj_index1 = vnet_buffer (p1)->ip.adj_index[adj_rx_tx];
1867 /* We should never rewrite a pkt using the MISS adjacency */
1868 ASSERT(adj_index0 && adj_index1);
1870 ip0 = vlib_buffer_get_current (p0);
1871 ip1 = vlib_buffer_get_current (p1);
1873 error0 = error1 = IP6_ERROR_NONE;
1874 next0 = next1 = IP6_REWRITE_NEXT_DROP;
1876 if (! rewrite_for_locally_received_packets)
1878 i32 hop_limit0 = ip0->hop_limit, hop_limit1 = ip1->hop_limit;
1880 /* Input node should have reject packets with hop limit 0. */
1881 ASSERT (ip0->hop_limit > 0);
1882 ASSERT (ip1->hop_limit > 0);
1887 ip0->hop_limit = hop_limit0;
1888 ip1->hop_limit = hop_limit1;
1891 * If the hop count drops below 1 when forwarding, generate
1894 if (PREDICT_FALSE(hop_limit0 <= 0))
1896 error0 = IP6_ERROR_TIME_EXPIRED;
1897 next0 = IP6_REWRITE_NEXT_ICMP_ERROR;
1898 vnet_buffer (p0)->sw_if_index[VLIB_TX] = (u32)~0;
1899 icmp6_error_set_vnet_buffer(p0, ICMP6_time_exceeded,
1900 ICMP6_time_exceeded_ttl_exceeded_in_transit, 0);
1902 if (PREDICT_FALSE(hop_limit1 <= 0))
1904 error1 = IP6_ERROR_TIME_EXPIRED;
1905 next1 = IP6_REWRITE_NEXT_ICMP_ERROR;
1906 vnet_buffer (p1)->sw_if_index[VLIB_TX] = (u32)~0;
1907 icmp6_error_set_vnet_buffer(p1, ICMP6_time_exceeded,
1908 ICMP6_time_exceeded_ttl_exceeded_in_transit, 0);
1912 adj0 = ip_get_adjacency (lm, adj_index0);
1913 adj1 = ip_get_adjacency (lm, adj_index1);
1915 rw_len0 = adj0[0].rewrite_header.data_bytes;
1916 rw_len1 = adj1[0].rewrite_header.data_bytes;
1917 vnet_buffer(p0)->ip.save_rewrite_length = rw_len0;
1918 vnet_buffer(p1)->ip.save_rewrite_length = rw_len1;
1920 vlib_increment_combined_counter (&adjacency_counters,
1923 /* packet increment */ 0,
1924 /* byte increment */ rw_len0);
1925 vlib_increment_combined_counter (&adjacency_counters,
1928 /* packet increment */ 0,
1929 /* byte increment */ rw_len1);
1931 /* Check MTU of outgoing interface. */
1932 error0 = (vlib_buffer_length_in_chain (vm, p0) > adj0[0].rewrite_header.max_l3_packet_bytes
1933 ? IP6_ERROR_MTU_EXCEEDED
1935 error1 = (vlib_buffer_length_in_chain (vm, p1) > adj1[0].rewrite_header.max_l3_packet_bytes
1936 ? IP6_ERROR_MTU_EXCEEDED
1939 /* Don't adjust the buffer for hop count issue; icmp-error node
1940 * wants to see the IP headerr */
1941 if (PREDICT_TRUE(error0 == IP6_ERROR_NONE))
1943 p0->current_data -= rw_len0;
1944 p0->current_length += rw_len0;
1946 tx_sw_if_index0 = adj0[0].rewrite_header.sw_if_index;
1947 vnet_buffer (p0)->sw_if_index[VLIB_TX] =
1949 next0 = adj0[0].rewrite_header.next_index;
1952 (clib_bitmap_get (lm->tx_sw_if_has_ip_output_features,
1955 p0->current_config_index =
1956 vec_elt (cm->config_index_by_sw_if_index,
1958 vnet_get_config_data (&cm->config_main,
1959 &p0->current_config_index,
1961 /* # bytes of config data */ 0);
1964 if (PREDICT_TRUE(error1 == IP6_ERROR_NONE))
1966 p1->current_data -= rw_len1;
1967 p1->current_length += rw_len1;
1969 tx_sw_if_index1 = adj1[0].rewrite_header.sw_if_index;
1970 vnet_buffer (p1)->sw_if_index[VLIB_TX] =
1972 next1 = adj1[0].rewrite_header.next_index;
1975 (clib_bitmap_get (lm->tx_sw_if_has_ip_output_features,
1978 p1->current_config_index =
1979 vec_elt (cm->config_index_by_sw_if_index,
1981 vnet_get_config_data (&cm->config_main,
1982 &p1->current_config_index,
1984 /* # bytes of config data */ 0);
1988 /* Guess we are only writing on simple Ethernet header. */
1989 vnet_rewrite_two_headers (adj0[0], adj1[0],
1991 sizeof (ethernet_header_t));
1995 adj0->sub_type.midchain.fixup_func(vm, adj0, p0);
1996 adj1->sub_type.midchain.fixup_func(vm, adj1, p1);
1999 vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
2000 to_next, n_left_to_next,
2001 pi0, pi1, next0, next1);
2004 while (n_left_from > 0 && n_left_to_next > 0)
2006 ip_adjacency_t * adj0;
2010 u32 adj_index0, next0, error0;
2011 u32 tx_sw_if_index0;
2013 pi0 = to_next[0] = from[0];
2015 p0 = vlib_get_buffer (vm, pi0);
2017 adj_index0 = vnet_buffer (p0)->ip.adj_index[adj_rx_tx];
2019 /* We should never rewrite a pkt using the MISS adjacency */
2022 adj0 = ip_get_adjacency (lm, adj_index0);
2024 ip0 = vlib_buffer_get_current (p0);
2026 error0 = IP6_ERROR_NONE;
2027 next0 = IP6_REWRITE_NEXT_DROP;
2029 /* Check hop limit */
2030 if (! rewrite_for_locally_received_packets)
2032 i32 hop_limit0 = ip0->hop_limit;
2034 ASSERT (ip0->hop_limit > 0);
2038 ip0->hop_limit = hop_limit0;
2040 if (PREDICT_FALSE(hop_limit0 <= 0))
2043 * If the hop count drops below 1 when forwarding, generate
2046 error0 = IP6_ERROR_TIME_EXPIRED;
2047 next0 = IP6_REWRITE_NEXT_ICMP_ERROR;
2048 vnet_buffer (p0)->sw_if_index[VLIB_TX] = (u32)~0;
2049 icmp6_error_set_vnet_buffer(p0, ICMP6_time_exceeded,
2050 ICMP6_time_exceeded_ttl_exceeded_in_transit, 0);
2054 /* Guess we are only writing on simple Ethernet header. */
2055 vnet_rewrite_one_header (adj0[0], ip0, sizeof (ethernet_header_t));
2057 /* Update packet buffer attributes/set output interface. */
2058 rw_len0 = adj0[0].rewrite_header.data_bytes;
2059 vnet_buffer(p0)->ip.save_rewrite_length = rw_len0;
2061 vlib_increment_combined_counter (&adjacency_counters,
2064 /* packet increment */ 0,
2065 /* byte increment */ rw_len0);
2067 /* Check MTU of outgoing interface. */
2068 error0 = (vlib_buffer_length_in_chain (vm, p0) > adj0[0].rewrite_header.max_l3_packet_bytes
2069 ? IP6_ERROR_MTU_EXCEEDED
2072 /* Don't adjust the buffer for hop count issue; icmp-error node
2073 * wants to see the IP headerr */
2074 if (PREDICT_TRUE(error0 == IP6_ERROR_NONE))
2076 p0->current_data -= rw_len0;
2077 p0->current_length += rw_len0;
2079 tx_sw_if_index0 = adj0[0].rewrite_header.sw_if_index;
2081 vnet_buffer (p0)->sw_if_index[VLIB_TX] = tx_sw_if_index0;
2082 next0 = adj0[0].rewrite_header.next_index;
2085 (clib_bitmap_get (lm->tx_sw_if_has_ip_output_features,
2088 p0->current_config_index =
2089 vec_elt (cm->config_index_by_sw_if_index,
2091 vnet_get_config_data (&cm->config_main,
2092 &p0->current_config_index,
2094 /* # bytes of config data */ 0);
2100 adj0->sub_type.midchain.fixup_func(vm, adj0, p0);
2103 p0->error = error_node->errors[error0];
2108 n_left_to_next -= 1;
2110 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
2111 to_next, n_left_to_next,
2115 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2118 /* Need to do trace after rewrites to pick up new packet data. */
2119 if (node->flags & VLIB_NODE_FLAG_TRACE)
2120 ip6_forward_next_trace (vm, node, frame, adj_rx_tx);
2122 return frame->n_vectors;
2126 ip6_rewrite_transit (vlib_main_t * vm,
2127 vlib_node_runtime_t * node,
2128 vlib_frame_t * frame)
2130 return ip6_rewrite_inline (vm, node, frame,
2131 /* rewrite_for_locally_received_packets */ 0,
2136 ip6_rewrite_local (vlib_main_t * vm,
2137 vlib_node_runtime_t * node,
2138 vlib_frame_t * frame)
2140 return ip6_rewrite_inline (vm, node, frame,
2141 /* rewrite_for_locally_received_packets */ 1,
2146 ip6_midchain (vlib_main_t * vm,
2147 vlib_node_runtime_t * node,
2148 vlib_frame_t * frame)
2150 return ip6_rewrite_inline (vm, node, frame,
2151 /* rewrite_for_locally_received_packets */ 0,
2155 VLIB_REGISTER_NODE (ip6_midchain_node) = {
2156 .function = ip6_midchain,
2157 .name = "ip6-midchain",
2158 .vector_size = sizeof (u32),
2160 .format_trace = format_ip6_forward_next_trace,
2162 .sibling_of = "ip6-rewrite",
2165 [IP6_REWRITE_NEXT_DROP] = "error-drop",
2169 VLIB_NODE_FUNCTION_MULTIARCH (ip6_midchain_node, ip6_midchain)
2171 VLIB_REGISTER_NODE (ip6_rewrite_node) = {
2172 .function = ip6_rewrite_transit,
2173 .name = "ip6-rewrite",
2174 .vector_size = sizeof (u32),
2176 .format_trace = format_ip6_rewrite_trace,
2180 [IP6_REWRITE_NEXT_DROP] = "error-drop",
2181 [IP6_REWRITE_NEXT_ICMP_ERROR] = "ip6-icmp-error",
2185 VLIB_NODE_FUNCTION_MULTIARCH (ip6_rewrite_node, ip6_rewrite_transit);
2187 VLIB_REGISTER_NODE (ip6_rewrite_local_node) = {
2188 .function = ip6_rewrite_local,
2189 .name = "ip6-rewrite-local",
2190 .vector_size = sizeof (u32),
2192 .sibling_of = "ip6-rewrite",
2194 .format_trace = format_ip6_rewrite_trace,
2199 VLIB_NODE_FUNCTION_MULTIARCH (ip6_rewrite_local_node, ip6_rewrite_local);
2202 * Hop-by-Hop handling
2205 ip6_hop_by_hop_main_t ip6_hop_by_hop_main;
2207 #define foreach_ip6_hop_by_hop_error \
2208 _(PROCESSED, "pkts with ip6 hop-by-hop options") \
2209 _(FORMAT, "incorrectly formatted hop-by-hop options") \
2210 _(UNKNOWN_OPTION, "unknown ip6 hop-by-hop options")
2213 #define _(sym,str) IP6_HOP_BY_HOP_ERROR_##sym,
2214 foreach_ip6_hop_by_hop_error
2216 IP6_HOP_BY_HOP_N_ERROR,
2217 } ip6_hop_by_hop_error_t;
2220 * Primary h-b-h handler trace support
2221 * We work pretty hard on the problem for obvious reasons
2226 u8 option_data[256];
2227 } ip6_hop_by_hop_trace_t;
2229 vlib_node_registration_t ip6_hop_by_hop_node;
2231 static char * ip6_hop_by_hop_error_strings[] = {
2232 #define _(sym,string) string,
2233 foreach_ip6_hop_by_hop_error
2238 format_ip6_hop_by_hop_trace (u8 * s, va_list * args)
2240 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
2241 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
2242 ip6_hop_by_hop_trace_t * t = va_arg (*args, ip6_hop_by_hop_trace_t *);
2243 ip6_hop_by_hop_header_t *hbh0;
2244 ip6_hop_by_hop_option_t *opt0, *limit0;
2245 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2249 hbh0 = (ip6_hop_by_hop_header_t *)t->option_data;
2251 s = format (s, "IP6_HOP_BY_HOP: next index %d len %d traced %d",
2252 t->next_index, (hbh0->length+1)<<3, t->trace_len);
2254 opt0 = (ip6_hop_by_hop_option_t *) (hbh0+1);
2255 limit0 = (ip6_hop_by_hop_option_t *) ((u8 *)hbh0) + t->trace_len;
2257 while (opt0 < limit0) {
2260 case 0: /* Pad, just stop */
2261 opt0 = (ip6_hop_by_hop_option_t *) ((u8 *)opt0) + 1;
2265 if (hm->trace[type0]) {
2266 s = (*hm->trace[type0])(s, opt0);
2268 s = format (s, "\n unrecognized option %d length %d", type0, opt0->length);
2270 opt0 = (ip6_hop_by_hop_option_t *) (((u8 *)opt0) + opt0->length + sizeof (ip6_hop_by_hop_option_t));
2277 always_inline u8 ip6_scan_hbh_options (
2280 ip6_hop_by_hop_header_t *hbh0,
2281 ip6_hop_by_hop_option_t *opt0,
2282 ip6_hop_by_hop_option_t *limit0,
2285 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2289 while (opt0 < limit0)
2295 opt0 = (ip6_hop_by_hop_option_t *) ((u8 *)opt0) + 1;
2300 if (hm->options[type0])
2302 if ((*hm->options[type0])(b0, ip0, opt0) < 0)
2304 error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2310 /* Unrecognized mandatory option, check the two high order bits */
2311 switch (opt0->type & HBH_OPTION_TYPE_HIGH_ORDER_BITS)
2313 case HBH_OPTION_TYPE_SKIP_UNKNOWN:
2315 case HBH_OPTION_TYPE_DISCARD_UNKNOWN:
2316 error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2317 *next0 = IP_LOOKUP_NEXT_DROP;
2319 case HBH_OPTION_TYPE_DISCARD_UNKNOWN_ICMP:
2320 error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2321 *next0 = IP_LOOKUP_NEXT_ICMP_ERROR;
2322 icmp6_error_set_vnet_buffer(b0, ICMP6_parameter_problem,
2323 ICMP6_parameter_problem_unrecognized_option, (u8 *)opt0 - (u8 *)ip0);
2325 case HBH_OPTION_TYPE_DISCARD_UNKNOWN_ICMP_NOT_MCAST:
2326 error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2327 if (!ip6_address_is_multicast(&ip0->dst_address))
2329 *next0 = IP_LOOKUP_NEXT_ICMP_ERROR;
2330 icmp6_error_set_vnet_buffer(b0, ICMP6_parameter_problem,
2331 ICMP6_parameter_problem_unrecognized_option, (u8 *)opt0 - (u8 *)ip0);
2335 *next0 = IP_LOOKUP_NEXT_DROP;
2342 opt0 = (ip6_hop_by_hop_option_t *) (((u8 *)opt0) + opt0->length + sizeof (ip6_hop_by_hop_option_t));
2348 * Process the Hop-by-Hop Options header
2351 ip6_hop_by_hop (vlib_main_t * vm,
2352 vlib_node_runtime_t * node,
2353 vlib_frame_t * frame)
2355 vlib_node_runtime_t *error_node = vlib_node_get_runtime(vm, ip6_hop_by_hop_node.index);
2356 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2357 u32 n_left_from, *from, *to_next;
2358 ip_lookup_next_t next_index;
2359 ip6_main_t * im = &ip6_main;
2360 ip_lookup_main_t *lm = &im->lookup_main;
2362 from = vlib_frame_vector_args (frame);
2363 n_left_from = frame->n_vectors;
2364 next_index = node->cached_next_index;
2366 while (n_left_from > 0) {
2369 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
2371 while (n_left_from >= 4 && n_left_to_next >= 2) {
2373 vlib_buffer_t * b0, *b1;
2375 ip6_header_t * ip0, *ip1;
2376 ip6_hop_by_hop_header_t *hbh0, *hbh1;
2377 ip6_hop_by_hop_option_t *opt0, *limit0, *opt1, *limit1;
2378 u8 error0 = 0, error1 = 0;
2380 /* Prefetch next iteration. */
2382 vlib_buffer_t * p2, * p3;
2384 p2 = vlib_get_buffer (vm, from[2]);
2385 p3 = vlib_get_buffer (vm, from[3]);
2387 vlib_prefetch_buffer_header (p2, LOAD);
2388 vlib_prefetch_buffer_header (p3, LOAD);
2390 CLIB_PREFETCH (p2->data, 2*CLIB_CACHE_LINE_BYTES, LOAD);
2391 CLIB_PREFETCH (p3->data, 2*CLIB_CACHE_LINE_BYTES, LOAD);
2394 /* Speculatively enqueue b0, b1 to the current next frame */
2395 to_next[0] = bi0 = from[0];
2396 to_next[1] = bi1 = from[1];
2400 n_left_to_next -= 2;
2402 b0 = vlib_get_buffer (vm, bi0);
2403 b1 = vlib_get_buffer (vm, bi1);
2404 u32 adj_index0 = vnet_buffer(b0)->ip.adj_index[VLIB_TX];
2405 ip_adjacency_t *adj0 = ip_get_adjacency(lm, adj_index0);
2406 u32 adj_index1 = vnet_buffer(b1)->ip.adj_index[VLIB_TX];
2407 ip_adjacency_t *adj1 = ip_get_adjacency(lm, adj_index1);
2409 /* Default use the next_index from the adjacency. A HBH option rarely redirects to a different node */
2410 next0 = adj0->lookup_next_index;
2411 next1 = adj1->lookup_next_index;
2413 ip0 = vlib_buffer_get_current (b0);
2414 ip1 = vlib_buffer_get_current (b1);
2415 hbh0 = (ip6_hop_by_hop_header_t *)(ip0+1);
2416 hbh1 = (ip6_hop_by_hop_header_t *)(ip1+1);
2417 opt0 = (ip6_hop_by_hop_option_t *)(hbh0+1);
2418 opt1 = (ip6_hop_by_hop_option_t *)(hbh1+1);
2419 limit0 = (ip6_hop_by_hop_option_t *)((u8 *)hbh0 + ((hbh0->length + 1) << 3));
2420 limit1 = (ip6_hop_by_hop_option_t *)((u8 *)hbh1 + ((hbh1->length + 1) << 3));
2423 * Basic validity checks
2425 if ((hbh0->length + 1) << 3 > clib_net_to_host_u16(ip0->payload_length)) {
2426 error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2427 next0 = IP_LOOKUP_NEXT_DROP;
2430 /* Scan the set of h-b-h options, process ones that we understand */
2431 error0 = ip6_scan_hbh_options(b0, ip0, hbh0, opt0, limit0, &next0);
2433 if ((hbh1->length + 1) << 3 > clib_net_to_host_u16(ip1->payload_length)) {
2434 error1 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2435 next1 = IP_LOOKUP_NEXT_DROP;
2438 /* Scan the set of h-b-h options, process ones that we understand */
2439 error1 = ip6_scan_hbh_options(b1,ip1,hbh1,opt1,limit1, &next1);
2442 /* Has the classifier flagged this buffer for special treatment? */
2443 if ((error0 == 0) && (vnet_buffer(b0)->l2_classify.opaque_index == OI_DECAP))
2444 next0 = hm->next_override;
2446 /* Has the classifier flagged this buffer for special treatment? */
2447 if ((error1 == 0) && (vnet_buffer(b1)->l2_classify.opaque_index == OI_DECAP))
2448 next1 = hm->next_override;
2450 if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE)))
2452 if (b0->flags & VLIB_BUFFER_IS_TRACED) {
2453 ip6_hop_by_hop_trace_t *t = vlib_add_trace(vm, node, b0, sizeof (*t));
2454 u32 trace_len = (hbh0->length + 1) << 3;
2455 t->next_index = next0;
2456 /* Capture the h-b-h option verbatim */
2457 trace_len = trace_len < ARRAY_LEN(t->option_data) ? trace_len : ARRAY_LEN(t->option_data);
2458 t->trace_len = trace_len;
2459 clib_memcpy(t->option_data, hbh0, trace_len);
2461 if (b1->flags & VLIB_BUFFER_IS_TRACED) {
2462 ip6_hop_by_hop_trace_t *t = vlib_add_trace(vm, node, b1, sizeof (*t));
2463 u32 trace_len = (hbh1->length + 1) << 3;
2464 t->next_index = next1;
2465 /* Capture the h-b-h option verbatim */
2466 trace_len = trace_len < ARRAY_LEN(t->option_data) ? trace_len : ARRAY_LEN(t->option_data);
2467 t->trace_len = trace_len;
2468 clib_memcpy(t->option_data, hbh1, trace_len);
2473 b0->error = error_node->errors[error0];
2474 b1->error = error_node->errors[error1];
2476 /* verify speculative enqueue, maybe switch current next frame */
2477 vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next, n_left_to_next, bi0,
2481 while (n_left_from > 0 && n_left_to_next > 0) {
2486 ip6_hop_by_hop_header_t *hbh0;
2487 ip6_hop_by_hop_option_t *opt0, *limit0;
2490 /* Speculatively enqueue b0 to the current next frame */
2496 n_left_to_next -= 1;
2498 b0 = vlib_get_buffer (vm, bi0);
2499 u32 adj_index0 = vnet_buffer(b0)->ip.adj_index[VLIB_TX];
2500 ip_adjacency_t *adj0 = ip_get_adjacency(lm, adj_index0);
2501 /* Default use the next_index from the adjacency. A HBH option rarely redirects to a different node */
2502 next0 = adj0->lookup_next_index;
2504 ip0 = vlib_buffer_get_current (b0);
2505 hbh0 = (ip6_hop_by_hop_header_t *)(ip0+1);
2506 opt0 = (ip6_hop_by_hop_option_t *)(hbh0+1);
2507 limit0 = (ip6_hop_by_hop_option_t *)((u8 *)hbh0 + ((hbh0->length + 1) << 3));
2510 * Basic validity checks
2512 if ((hbh0->length + 1) << 3 > clib_net_to_host_u16(ip0->payload_length)) {
2513 error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2514 next0 = IP_LOOKUP_NEXT_DROP;
2518 /* Scan the set of h-b-h options, process ones that we understand */
2519 error0 = ip6_scan_hbh_options(b0, ip0, hbh0, opt0, limit0, &next0);
2522 /* Has the classifier flagged this buffer for special treatment? */
2523 if ((error0 == 0) && (vnet_buffer(b0)->l2_classify.opaque_index == OI_DECAP))
2524 next0 = hm->next_override;
2526 if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED)) {
2527 ip6_hop_by_hop_trace_t *t = vlib_add_trace(vm, node, b0, sizeof (*t));
2528 u32 trace_len = (hbh0->length + 1) << 3;
2529 t->next_index = next0;
2530 /* Capture the h-b-h option verbatim */
2531 trace_len = trace_len < ARRAY_LEN(t->option_data) ? trace_len : ARRAY_LEN(t->option_data);
2532 t->trace_len = trace_len;
2533 clib_memcpy(t->option_data, hbh0, trace_len);
2536 b0->error = error_node->errors[error0];
2538 /* verify speculative enqueue, maybe switch current next frame */
2539 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next, n_left_to_next, bi0, next0);
2541 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2543 return frame->n_vectors;
2546 VLIB_REGISTER_NODE (ip6_hop_by_hop_node) = {
2547 .function = ip6_hop_by_hop,
2548 .name = "ip6-hop-by-hop",
2549 .sibling_of = "ip6-lookup",
2550 .vector_size = sizeof (u32),
2551 .format_trace = format_ip6_hop_by_hop_trace,
2552 .type = VLIB_NODE_TYPE_INTERNAL,
2553 .n_errors = ARRAY_LEN(ip6_hop_by_hop_error_strings),
2554 .error_strings = ip6_hop_by_hop_error_strings,
2558 VLIB_NODE_FUNCTION_MULTIARCH (ip6_hop_by_hop_node, ip6_hop_by_hop);
2560 static clib_error_t *
2561 ip6_hop_by_hop_init (vlib_main_t * vm)
2563 ip6_hop_by_hop_main_t * hm = &ip6_hop_by_hop_main;
2564 memset(hm->options, 0, sizeof(hm->options));
2565 memset(hm->trace, 0, sizeof(hm->trace));
2566 hm->next_override = IP6_LOOKUP_NEXT_POP_HOP_BY_HOP;
2570 VLIB_INIT_FUNCTION (ip6_hop_by_hop_init);
2572 void ip6_hbh_set_next_override (uword next)
2574 ip6_hop_by_hop_main_t * hm = &ip6_hop_by_hop_main;
2576 hm->next_override = next;
2580 ip6_hbh_register_option (u8 option,
2581 int options(vlib_buffer_t *b, ip6_header_t *ip, ip6_hop_by_hop_option_t *opt),
2582 u8 *trace(u8 *s, ip6_hop_by_hop_option_t *opt))
2584 ip6_main_t * im = &ip6_main;
2585 ip6_hop_by_hop_main_t * hm = &ip6_hop_by_hop_main;
2587 ASSERT (option < ARRAY_LEN (hm->options));
2589 /* Already registered */
2590 if (hm->options[option])
2593 hm->options[option] = options;
2594 hm->trace[option] = trace;
2596 /* Set global variable */
2597 im->hbh_enabled = 1;
2603 ip6_hbh_unregister_option (u8 option)
2605 ip6_main_t * im = &ip6_main;
2606 ip6_hop_by_hop_main_t * hm = &ip6_hop_by_hop_main;
2608 ASSERT (option < ARRAY_LEN (hm->options));
2610 /* Not registered */
2611 if (!hm->options[option])
2614 hm->options[option] = NULL;
2615 hm->trace[option] = NULL;
2617 /* Disable global knob if this was the last option configured */
2620 for (i = 0; i < 256; i++) {
2621 if (hm->options[option]) {
2627 im->hbh_enabled = 0;
2632 /* Global IP6 main. */
2633 ip6_main_t ip6_main;
2635 static clib_error_t *
2636 ip6_lookup_init (vlib_main_t * vm)
2638 ip6_main_t * im = &ip6_main;
2639 clib_error_t * error;
2642 for (i = 0; i < ARRAY_LEN (im->fib_masks); i++)
2649 for (j = 0; j < i0; j++)
2650 im->fib_masks[i].as_u32[j] = ~0;
2653 im->fib_masks[i].as_u32[i0] = clib_host_to_net_u32 (pow2_mask (i1) << (32 - i1));
2656 ip_lookup_init (&im->lookup_main, /* is_ip6 */ 1);
2658 if (im->lookup_table_nbuckets == 0)
2659 im->lookup_table_nbuckets = IP6_FIB_DEFAULT_HASH_NUM_BUCKETS;
2661 im->lookup_table_nbuckets = 1<< max_log2 (im->lookup_table_nbuckets);
2663 if (im->lookup_table_size == 0)
2664 im->lookup_table_size = IP6_FIB_DEFAULT_HASH_MEMORY_SIZE;
2666 BV(clib_bihash_init) (&(im->ip6_table[IP6_FIB_TABLE_FWDING].ip6_hash),
2667 "ip6 FIB fwding table",
2668 im->lookup_table_nbuckets,
2669 im->lookup_table_size);
2670 BV(clib_bihash_init) (&im->ip6_table[IP6_FIB_TABLE_NON_FWDING].ip6_hash,
2671 "ip6 FIB non-fwding table",
2672 im->lookup_table_nbuckets,
2673 im->lookup_table_size);
2675 /* Create FIB with index 0 and table id of 0. */
2676 fib_table_find_or_create_and_lock(FIB_PROTOCOL_IP6, 0);
2680 pn = pg_get_node (ip6_lookup_node.index);
2681 pn->unformat_edit = unformat_pg_ip6_header;
2684 /* Unless explicitly configured, don't process HBH options */
2685 im->hbh_enabled = 0;
2688 icmp6_neighbor_solicitation_header_t p;
2690 memset (&p, 0, sizeof (p));
2692 p.ip.ip_version_traffic_class_and_flow_label = clib_host_to_net_u32 (0x6 << 28);
2693 p.ip.payload_length = clib_host_to_net_u16 (sizeof (p)
2694 - STRUCT_OFFSET_OF (icmp6_neighbor_solicitation_header_t, neighbor));
2695 p.ip.protocol = IP_PROTOCOL_ICMP6;
2696 p.ip.hop_limit = 255;
2697 ip6_set_solicited_node_multicast_address (&p.ip.dst_address, 0);
2699 p.neighbor.icmp.type = ICMP6_neighbor_solicitation;
2701 p.link_layer_option.header.type = ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address;
2702 p.link_layer_option.header.n_data_u64s = sizeof (p.link_layer_option) / sizeof (u64);
2704 vlib_packet_template_init (vm,
2705 &im->discover_neighbor_packet_template,
2707 /* alloc chunk size */ 8,
2708 "ip6 neighbor discovery");
2711 error = ip6_feature_init (vm, im);
2716 VLIB_INIT_FUNCTION (ip6_lookup_init);
2718 static clib_error_t *
2719 add_del_ip6_interface_table (vlib_main_t * vm,
2720 unformat_input_t * input,
2721 vlib_cli_command_t * cmd)
2723 vnet_main_t * vnm = vnet_get_main();
2724 clib_error_t * error = 0;
2725 u32 sw_if_index, table_id;
2729 if (! unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
2731 error = clib_error_return (0, "unknown interface `%U'",
2732 format_unformat_error, input);
2736 if (unformat (input, "%d", &table_id))
2740 error = clib_error_return (0, "expected table id `%U'",
2741 format_unformat_error, input);
2746 u32 fib_index = fib_table_find_or_create_and_lock(FIB_PROTOCOL_IP6,
2749 vec_validate (ip6_main.fib_index_by_sw_if_index, sw_if_index);
2750 ip6_main.fib_index_by_sw_if_index[sw_if_index] = fib_index;
2758 VLIB_CLI_COMMAND (set_interface_ip6_table_command, static) = {
2759 .path = "set interface ip6 table",
2760 .function = add_del_ip6_interface_table,
2761 .short_help = "set interface ip6 table <intfc> <table-id>"
2765 ip6_link_local_address_from_ethernet_mac_address (ip6_address_t *ip,
2768 ip->as_u64[0] = clib_host_to_net_u64 (0xFE80000000000000ULL);
2769 /* Invert the "u" bit */
2770 ip->as_u8 [8] = mac[0] ^ (1<<1);
2771 ip->as_u8 [9] = mac[1];
2772 ip->as_u8 [10] = mac[2];
2773 ip->as_u8 [11] = 0xFF;
2774 ip->as_u8 [12] = 0xFE;
2775 ip->as_u8 [13] = mac[3];
2776 ip->as_u8 [14] = mac[4];
2777 ip->as_u8 [15] = mac[5];
2781 ip6_ethernet_mac_address_from_link_local_address (u8 *mac,
2784 /* Invert the previously inverted "u" bit */
2785 mac[0] = ip->as_u8 [8] ^ (1<<1);
2786 mac[1] = ip->as_u8 [9];
2787 mac[2] = ip->as_u8 [10];
2788 mac[3] = ip->as_u8 [13];
2789 mac[4] = ip->as_u8 [14];
2790 mac[5] = ip->as_u8 [15];
2793 static clib_error_t *
2794 test_ip6_link_command_fn (vlib_main_t * vm,
2795 unformat_input_t * input,
2796 vlib_cli_command_t * cmd)
2799 ip6_address_t _a, *a = &_a;
2801 if (unformat (input, "%U", unformat_ethernet_address, mac))
2803 ip6_link_local_address_from_ethernet_mac_address (a, mac);
2804 vlib_cli_output (vm, "Link local address: %U",
2805 format_ip6_address, a);
2806 ip6_ethernet_mac_address_from_link_local_address (mac, a);
2807 vlib_cli_output (vm, "Original MAC address: %U",
2808 format_ethernet_address, mac);
2814 VLIB_CLI_COMMAND (test_link_command, static) = {
2815 .path = "test ip6 link",
2816 .function = test_ip6_link_command_fn,
2817 .short_help = "test ip6 link <mac-address>",
2820 int vnet_set_ip6_flow_hash (u32 table_id, u32 flow_hash_config)
2822 ip6_main_t * im6 = &ip6_main;
2824 uword * p = hash_get (im6->fib_index_by_table_id, table_id);
2829 fib = ip6_fib_get (p[0]);
2831 fib->flow_hash_config = flow_hash_config;
2835 static clib_error_t *
2836 set_ip6_flow_hash_command_fn (vlib_main_t * vm,
2837 unformat_input_t * input,
2838 vlib_cli_command_t * cmd)
2842 u32 flow_hash_config = 0;
2845 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) {
2846 if (unformat (input, "table %d", &table_id))
2849 else if (unformat (input, #a)) { flow_hash_config |= v; matched=1;}
2850 foreach_flow_hash_bit
2856 return clib_error_return (0, "unknown input `%U'",
2857 format_unformat_error, input);
2859 rv = vnet_set_ip6_flow_hash (table_id, flow_hash_config);
2866 return clib_error_return (0, "no such FIB table %d", table_id);
2869 clib_warning ("BUG: illegal flow hash config 0x%x", flow_hash_config);
2876 VLIB_CLI_COMMAND (set_ip6_flow_hash_command, static) = {
2877 .path = "set ip6 flow-hash",
2879 "set ip table flow-hash table <fib-id> src dst sport dport proto reverse",
2880 .function = set_ip6_flow_hash_command_fn,
2883 static clib_error_t *
2884 show_ip6_local_command_fn (vlib_main_t * vm,
2885 unformat_input_t * input,
2886 vlib_cli_command_t * cmd)
2888 ip6_main_t * im = &ip6_main;
2889 ip_lookup_main_t * lm = &im->lookup_main;
2892 vlib_cli_output (vm, "Protocols handled by ip6_local");
2893 for (i = 0; i < ARRAY_LEN(lm->local_next_by_ip_protocol); i++)
2895 if (lm->local_next_by_ip_protocol[i] != IP_LOCAL_NEXT_PUNT)
2896 vlib_cli_output (vm, "%d", i);
2903 VLIB_CLI_COMMAND (show_ip6_local, static) = {
2904 .path = "show ip6 local",
2905 .function = show_ip6_local_command_fn,
2906 .short_help = "Show ip6 local protocol table",
2909 int vnet_set_ip6_classify_intfc (vlib_main_t * vm, u32 sw_if_index,
2912 vnet_main_t * vnm = vnet_get_main();
2913 vnet_interface_main_t * im = &vnm->interface_main;
2914 ip6_main_t * ipm = &ip6_main;
2915 ip_lookup_main_t * lm = &ipm->lookup_main;
2916 vnet_classify_main_t * cm = &vnet_classify_main;
2917 ip6_address_t *if_addr;
2919 if (pool_is_free_index (im->sw_interfaces, sw_if_index))
2920 return VNET_API_ERROR_NO_MATCHING_INTERFACE;
2922 if (table_index != ~0 && pool_is_free_index (cm->tables, table_index))
2923 return VNET_API_ERROR_NO_SUCH_ENTRY;
2925 vec_validate (lm->classify_table_index_by_sw_if_index, sw_if_index);
2926 lm->classify_table_index_by_sw_if_index [sw_if_index] = table_index;
2928 if_addr = ip6_interface_first_address (ipm, sw_if_index, NULL);
2930 if (NULL != if_addr)
2932 fib_prefix_t pfx = {
2934 .fp_proto = FIB_PROTOCOL_IP6,
2935 .fp_addr.ip6 = *if_addr,
2939 fib_index = fib_table_get_index_for_sw_if_index(FIB_PROTOCOL_IP4,
2943 if (table_index != (u32) ~0)
2945 dpo_id_t dpo = DPO_NULL;
2950 classify_dpo_create(FIB_PROTOCOL_IP4,
2953 fib_table_entry_special_dpo_add(fib_index,
2955 FIB_SOURCE_CLASSIFY,
2956 FIB_ENTRY_FLAG_NONE,
2962 fib_table_entry_special_remove(fib_index,
2964 FIB_SOURCE_CLASSIFY);
2971 static clib_error_t *
2972 set_ip6_classify_command_fn (vlib_main_t * vm,
2973 unformat_input_t * input,
2974 vlib_cli_command_t * cmd)
2976 u32 table_index = ~0;
2977 int table_index_set = 0;
2978 u32 sw_if_index = ~0;
2981 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) {
2982 if (unformat (input, "table-index %d", &table_index))
2983 table_index_set = 1;
2984 else if (unformat (input, "intfc %U", unformat_vnet_sw_interface,
2985 vnet_get_main(), &sw_if_index))
2991 if (table_index_set == 0)
2992 return clib_error_return (0, "classify table-index must be specified");
2994 if (sw_if_index == ~0)
2995 return clib_error_return (0, "interface / subif must be specified");
2997 rv = vnet_set_ip6_classify_intfc (vm, sw_if_index, table_index);
3004 case VNET_API_ERROR_NO_MATCHING_INTERFACE:
3005 return clib_error_return (0, "No such interface");
3007 case VNET_API_ERROR_NO_SUCH_ENTRY:
3008 return clib_error_return (0, "No such classifier table");
3013 VLIB_CLI_COMMAND (set_ip6_classify_command, static) = {
3014 .path = "set ip6 classify",
3016 "set ip6 classify intfc <int> table-index <index>",
3017 .function = set_ip6_classify_command_fn,
3020 static clib_error_t *
3021 ip6_config (vlib_main_t * vm, unformat_input_t * input)
3023 ip6_main_t * im = &ip6_main;
3028 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) {
3029 if (unformat (input, "hash-buckets %d", &tmp))
3031 else if (unformat (input, "heap-size %dm", &tmp))
3032 heapsize = ((u64)tmp) << 20;
3033 else if (unformat (input, "heap-size %dM", &tmp))
3034 heapsize = ((u64)tmp) << 20;
3035 else if (unformat (input, "heap-size %dg", &tmp))
3036 heapsize = ((u64)tmp) << 30;
3037 else if (unformat (input, "heap-size %dG", &tmp))
3038 heapsize = ((u64)tmp) << 30;
3040 return clib_error_return (0, "unknown input '%U'",
3041 format_unformat_error, input);
3044 im->lookup_table_nbuckets = nbuckets;
3045 im->lookup_table_size = heapsize;
3050 VLIB_EARLY_CONFIG_FUNCTION (ip6_config, "ip6");
3055 static clib_error_t *
3056 set_interface_ip6_output_feature_command_fn (vlib_main_t * vm,
3057 unformat_input_t * input,
3058 vlib_cli_command_t * cmd)
3060 vnet_main_t * vnm = vnet_get_main();
3061 u32 sw_if_index = ~0;
3063 ip6_main_t * im = &ip6_main;
3064 ip_lookup_main_t * lm = &im->lookup_main;
3066 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
3068 if (unformat (input, "%U", unformat_vnet_sw_interface, vnm, &sw_if_index))
3070 else if (unformat (input, "del"))
3076 if (sw_if_index == ~0)
3077 return clib_error_return (0, "unknown interface `%U'",
3078 format_unformat_error, input);
3080 lm->tx_sw_if_has_ip_output_features =
3081 clib_bitmap_set (lm->tx_sw_if_has_ip_output_features, sw_if_index, is_add);
3086 VLIB_CLI_COMMAND (set_interface_ip6_output_feature, static) = {
3087 .path = "set interface ip6 output feature",
3088 .function = set_interface_ip6_output_feature_command_fn,
3089 .short_help = "set interface output feature <intfc>",
3091 #endif /* TEST_CODE */