2 * Copyright (c) 2016 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
16 * ip/ip6_forward.c: IP v6 forwarding
18 * Copyright (c) 2008 Eliot Dresselhaus
20 * Permission is hereby granted, free of charge, to any person obtaining
21 * a copy of this software and associated documentation files (the
22 * "Software"), to deal in the Software without restriction, including
23 * without limitation the rights to use, copy, modify, merge, publish,
24 * distribute, sublicense, and/or sell copies of the Software, and to
25 * permit persons to whom the Software is furnished to do so, subject to
26 * the following conditions:
28 * The above copyright notice and this permission notice shall be
29 * included in all copies or substantial portions of the Software.
31 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
32 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
33 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
34 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
35 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
36 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
37 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
40 #include <vnet/vnet.h>
41 #include <vnet/ip/ip.h>
42 #include <vnet/ip/ip6_neighbor.h>
43 #include <vnet/ethernet/ethernet.h> /* for ethernet_header_t */
44 #include <vnet/srp/srp.h> /* for srp_hw_interface_class */
45 #include <vppinfra/cache.h>
46 #include <vnet/fib/fib_urpf_list.h> /* for FIB uRPF check */
47 #include <vnet/fib/ip6_fib.h>
48 #include <vnet/mfib/ip6_mfib.h>
49 #include <vnet/dpo/load_balance_map.h>
50 #include <vnet/dpo/classify_dpo.h>
52 #include <vppinfra/bihash_template.c>
53 #include <vnet/ip/ip6_forward.h>
55 /* Flag used by IOAM code. Classifier sets it pop-hop-by-hop checks it */
56 #define OI_DECAP 0x80000000
59 ip6_add_interface_routes (vnet_main_t * vnm, u32 sw_if_index,
60 ip6_main_t * im, u32 fib_index,
61 ip_interface_address_t * a)
63 ip_lookup_main_t *lm = &im->lookup_main;
64 ip6_address_t *address = ip_interface_address_get_address (lm, a);
66 .fp_len = a->address_length,
67 .fp_proto = FIB_PROTOCOL_IP6,
68 .fp_addr.ip6 = *address,
71 if (a->address_length < 128)
73 fib_table_entry_update_one_path (fib_index,
76 (FIB_ENTRY_FLAG_CONNECTED |
77 FIB_ENTRY_FLAG_ATTACHED),
79 /* No next-hop address */
81 /* invalid FIB index */
84 NULL, FIB_ROUTE_PATH_FLAG_NONE);
88 if (sw_if_index < vec_len (lm->classify_table_index_by_sw_if_index))
90 u32 classify_table_index =
91 lm->classify_table_index_by_sw_if_index[sw_if_index];
92 if (classify_table_index != (u32) ~ 0)
94 dpo_id_t dpo = DPO_INVALID;
99 classify_dpo_create (DPO_PROTO_IP6, classify_table_index));
101 fib_table_entry_special_dpo_add (fib_index,
104 FIB_ENTRY_FLAG_NONE, &dpo);
109 fib_table_entry_update_one_path (fib_index, &pfx,
110 FIB_SOURCE_INTERFACE,
111 (FIB_ENTRY_FLAG_CONNECTED |
112 FIB_ENTRY_FLAG_LOCAL),
116 1, NULL, FIB_ROUTE_PATH_FLAG_NONE);
120 ip6_del_interface_routes (ip6_main_t * im,
122 ip6_address_t * address, u32 address_length)
125 .fp_len = address_length,
126 .fp_proto = FIB_PROTOCOL_IP6,
127 .fp_addr.ip6 = *address,
130 if (pfx.fp_len < 128)
132 fib_table_entry_delete (fib_index, &pfx, FIB_SOURCE_INTERFACE);
137 fib_table_entry_delete (fib_index, &pfx, FIB_SOURCE_INTERFACE);
141 ip6_sw_interface_enable_disable (u32 sw_if_index, u32 is_enable)
143 ip6_main_t *im = &ip6_main;
145 vec_validate_init_empty (im->ip_enabled_by_sw_if_index, sw_if_index, 0);
148 * enable/disable only on the 1<->0 transition
152 if (1 != ++im->ip_enabled_by_sw_if_index[sw_if_index])
157 /* The ref count is 0 when an address is removed from an interface that has
158 * no address - this is not a ciritical error */
159 if (0 == im->ip_enabled_by_sw_if_index[sw_if_index] ||
160 0 != --im->ip_enabled_by_sw_if_index[sw_if_index])
164 vnet_feature_enable_disable ("ip6-unicast", "ip6-not-enabled", sw_if_index,
167 vnet_feature_enable_disable ("ip6-multicast", "ip6-not-enabled",
168 sw_if_index, !is_enable, 0, 0);
171 /* get first interface address */
173 ip6_interface_first_address (ip6_main_t * im, u32 sw_if_index)
175 ip_lookup_main_t *lm = &im->lookup_main;
176 ip_interface_address_t *ia = 0;
177 ip6_address_t *result = 0;
180 foreach_ip_interface_address (lm, ia, sw_if_index,
181 1 /* honor unnumbered */,
183 ip6_address_t * a = ip_interface_address_get_address (lm, ia);
192 ip6_add_del_interface_address (vlib_main_t * vm,
194 ip6_address_t * address,
195 u32 address_length, u32 is_del)
197 vnet_main_t *vnm = vnet_get_main ();
198 ip6_main_t *im = &ip6_main;
199 ip_lookup_main_t *lm = &im->lookup_main;
201 u32 if_address_index;
202 ip6_address_fib_t ip6_af, *addr_fib = 0;
204 /* local0 interface doesn't support IP addressing */
205 if (sw_if_index == 0)
208 clib_error_create ("local0 interface doesn't support IP addressing");
211 vec_validate (im->fib_index_by_sw_if_index, sw_if_index);
212 vec_validate (im->mfib_index_by_sw_if_index, sw_if_index);
214 ip6_addr_fib_init (&ip6_af, address,
215 vec_elt (im->fib_index_by_sw_if_index, sw_if_index));
216 vec_add1 (addr_fib, ip6_af);
219 uword elts_before = pool_elts (lm->if_address_pool);
221 error = ip_interface_address_add_del
222 (lm, sw_if_index, addr_fib, address_length, is_del, &if_address_index);
226 /* Pool did not grow: add duplicate address. */
227 if (elts_before == pool_elts (lm->if_address_pool))
231 ip6_sw_interface_enable_disable (sw_if_index, !is_del);
234 ip6_del_interface_routes (im, ip6_af.fib_index, address, address_length);
236 ip6_add_interface_routes (vnm, sw_if_index,
237 im, ip6_af.fib_index,
238 pool_elt_at_index (lm->if_address_pool,
242 ip6_add_del_interface_address_callback_t *cb;
243 vec_foreach (cb, im->add_del_interface_address_callbacks)
244 cb->function (im, cb->function_opaque, sw_if_index,
245 address, address_length, if_address_index, is_del);
254 ip6_sw_interface_admin_up_down (vnet_main_t * vnm, u32 sw_if_index, u32 flags)
256 ip6_main_t *im = &ip6_main;
257 ip_interface_address_t *ia;
259 u32 is_admin_up, fib_index;
261 /* Fill in lookup tables with default table (0). */
262 vec_validate (im->fib_index_by_sw_if_index, sw_if_index);
264 vec_validate_init_empty (im->
265 lookup_main.if_address_pool_index_by_sw_if_index,
268 is_admin_up = (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) != 0;
270 fib_index = vec_elt (im->fib_index_by_sw_if_index, sw_if_index);
273 foreach_ip_interface_address (&im->lookup_main, ia, sw_if_index,
274 0 /* honor unnumbered */,
276 a = ip_interface_address_get_address (&im->lookup_main, ia);
278 ip6_add_interface_routes (vnm, sw_if_index,
282 ip6_del_interface_routes (im, fib_index,
283 a, ia->address_length);
290 VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION (ip6_sw_interface_admin_up_down);
292 /* Built-in ip6 unicast rx feature path definition */
294 VNET_FEATURE_ARC_INIT (ip6_unicast, static) =
296 .arc_name = "ip6-unicast",
297 .start_nodes = VNET_FEATURES ("ip6-input"),
298 .arc_index_ptr = &ip6_main.lookup_main.ucast_feature_arc_index,
301 VNET_FEATURE_INIT (ip6_flow_classify, static) =
303 .arc_name = "ip6-unicast",
304 .node_name = "ip6-flow-classify",
305 .runs_before = VNET_FEATURES ("ip6-inacl"),
308 VNET_FEATURE_INIT (ip6_inacl, static) =
310 .arc_name = "ip6-unicast",
311 .node_name = "ip6-inacl",
312 .runs_before = VNET_FEATURES ("ip6-policer-classify"),
315 VNET_FEATURE_INIT (ip6_policer_classify, static) =
317 .arc_name = "ip6-unicast",
318 .node_name = "ip6-policer-classify",
319 .runs_before = VNET_FEATURES ("ipsec-input-ip6"),
322 VNET_FEATURE_INIT (ip6_ipsec, static) =
324 .arc_name = "ip6-unicast",
325 .node_name = "ipsec-input-ip6",
326 .runs_before = VNET_FEATURES ("l2tp-decap"),
329 VNET_FEATURE_INIT (ip6_l2tp, static) =
331 .arc_name = "ip6-unicast",
332 .node_name = "l2tp-decap",
333 .runs_before = VNET_FEATURES ("vpath-input-ip6"),
336 VNET_FEATURE_INIT (ip6_vpath, static) =
338 .arc_name = "ip6-unicast",
339 .node_name = "vpath-input-ip6",
340 .runs_before = VNET_FEATURES ("ip6-vxlan-bypass"),
343 VNET_FEATURE_INIT (ip6_vxlan_bypass, static) =
345 .arc_name = "ip6-unicast",
346 .node_name = "ip6-vxlan-bypass",
347 .runs_before = VNET_FEATURES ("ip6-lookup"),
350 VNET_FEATURE_INIT (ip6_not_enabled, static) =
352 .arc_name = "ip6-unicast",
353 .node_name = "ip6-not-enabled",
354 .runs_before = VNET_FEATURES ("ip6-lookup"),
357 VNET_FEATURE_INIT (ip6_lookup, static) =
359 .arc_name = "ip6-unicast",
360 .node_name = "ip6-lookup",
361 .runs_before = 0, /*last feature*/
364 /* Built-in ip6 multicast rx feature path definition (none now) */
365 VNET_FEATURE_ARC_INIT (ip6_multicast, static) =
367 .arc_name = "ip6-multicast",
368 .start_nodes = VNET_FEATURES ("ip6-input"),
369 .arc_index_ptr = &ip6_main.lookup_main.mcast_feature_arc_index,
372 VNET_FEATURE_INIT (ip6_vpath_mc, static) = {
373 .arc_name = "ip6-multicast",
374 .node_name = "vpath-input-ip6",
375 .runs_before = VNET_FEATURES ("ip6-mfib-forward-lookup"),
378 VNET_FEATURE_INIT (ip6_not_enabled_mc, static) = {
379 .arc_name = "ip6-multicast",
380 .node_name = "ip6-not-enabled",
381 .runs_before = VNET_FEATURES ("ip6-mfib-forward-lookup"),
384 VNET_FEATURE_INIT (ip6_mc_lookup, static) = {
385 .arc_name = "ip6-multicast",
386 .node_name = "ip6-mfib-forward-lookup",
387 .runs_before = 0, /* last feature */
390 /* Built-in ip4 tx feature path definition */
391 VNET_FEATURE_ARC_INIT (ip6_output, static) =
393 .arc_name = "ip6-output",
394 .start_nodes = VNET_FEATURES ("ip6-rewrite", "ip6-midchain", "ip6-dvr-dpo"),
395 .arc_index_ptr = &ip6_main.lookup_main.output_feature_arc_index,
398 VNET_FEATURE_INIT (ip6_outacl, static) = {
399 .arc_name = "ip6-output",
400 .node_name = "ip6-outacl",
401 .runs_before = VNET_FEATURES ("ipsec-output-ip6"),
404 VNET_FEATURE_INIT (ip6_ipsec_output, static) = {
405 .arc_name = "ip6-output",
406 .node_name = "ipsec-output-ip6",
407 .runs_before = VNET_FEATURES ("interface-output"),
410 VNET_FEATURE_INIT (ip6_interface_output, static) = {
411 .arc_name = "ip6-output",
412 .node_name = "interface-output",
413 .runs_before = 0, /* not before any other features */
418 ip6_sw_interface_add_del (vnet_main_t * vnm, u32 sw_if_index, u32 is_add)
420 ip6_main_t *im = &ip6_main;
422 vec_validate (im->fib_index_by_sw_if_index, sw_if_index);
423 vec_validate (im->mfib_index_by_sw_if_index, sw_if_index);
427 /* Ensure that IPv6 is disabled */
428 ip6_main_t *im6 = &ip6_main;
429 ip_lookup_main_t *lm6 = &im6->lookup_main;
430 ip_interface_address_t *ia = 0;
431 ip6_address_t *address;
432 vlib_main_t *vm = vlib_get_main ();
434 ip6_neighbor_sw_interface_add_del (vnm, sw_if_index, 0 /* is_add */ );
436 foreach_ip_interface_address (lm6, ia, sw_if_index, 1 /* honor unnumbered */,
438 address = ip_interface_address_get_address (lm6, ia);
439 ip6_add_del_interface_address(vm, sw_if_index, address, ia->address_length, 1);
442 ip6_mfib_interface_enable_disable (sw_if_index, 0);
445 vnet_feature_enable_disable ("ip6-unicast", "ip6-not-enabled", sw_if_index,
448 vnet_feature_enable_disable ("ip6-multicast", "ip6-not-enabled",
449 sw_if_index, is_add, 0, 0);
451 return /* no error */ 0;
454 VNET_SW_INTERFACE_ADD_DEL_FUNCTION (ip6_sw_interface_add_del);
457 ip6_lookup (vlib_main_t * vm,
458 vlib_node_runtime_t * node, vlib_frame_t * frame)
460 return ip6_lookup_inline (vm, node, frame);
463 static u8 *format_ip6_lookup_trace (u8 * s, va_list * args);
466 VLIB_REGISTER_NODE (ip6_lookup_node) =
468 .function = ip6_lookup,
469 .name = "ip6-lookup",
470 .vector_size = sizeof (u32),
471 .format_trace = format_ip6_lookup_trace,
472 .n_next_nodes = IP6_LOOKUP_N_NEXT,
473 .next_nodes = IP6_LOOKUP_NEXT_NODES,
477 VLIB_NODE_FUNCTION_MULTIARCH (ip6_lookup_node, ip6_lookup);
480 ip6_load_balance (vlib_main_t * vm,
481 vlib_node_runtime_t * node, vlib_frame_t * frame)
483 vlib_combined_counter_main_t *cm = &load_balance_main.lbm_via_counters;
484 u32 n_left_from, n_left_to_next, *from, *to_next;
485 ip_lookup_next_t next;
486 u32 thread_index = vlib_get_thread_index ();
487 ip6_main_t *im = &ip6_main;
489 from = vlib_frame_vector_args (frame);
490 n_left_from = frame->n_vectors;
491 next = node->cached_next_index;
493 if (node->flags & VLIB_NODE_FLAG_TRACE)
494 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
496 while (n_left_from > 0)
498 vlib_get_next_frame (vm, node, next, to_next, n_left_to_next);
501 while (n_left_from >= 4 && n_left_to_next >= 2)
503 ip_lookup_next_t next0, next1;
504 const load_balance_t *lb0, *lb1;
505 vlib_buffer_t *p0, *p1;
506 u32 pi0, lbi0, hc0, pi1, lbi1, hc1;
507 const ip6_header_t *ip0, *ip1;
508 const dpo_id_t *dpo0, *dpo1;
510 /* Prefetch next iteration. */
512 vlib_buffer_t *p2, *p3;
514 p2 = vlib_get_buffer (vm, from[2]);
515 p3 = vlib_get_buffer (vm, from[3]);
517 vlib_prefetch_buffer_header (p2, STORE);
518 vlib_prefetch_buffer_header (p3, STORE);
520 CLIB_PREFETCH (p2->data, sizeof (ip0[0]), STORE);
521 CLIB_PREFETCH (p3->data, sizeof (ip0[0]), STORE);
524 pi0 = to_next[0] = from[0];
525 pi1 = to_next[1] = from[1];
532 p0 = vlib_get_buffer (vm, pi0);
533 p1 = vlib_get_buffer (vm, pi1);
535 ip0 = vlib_buffer_get_current (p0);
536 ip1 = vlib_buffer_get_current (p1);
537 lbi0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
538 lbi1 = vnet_buffer (p1)->ip.adj_index[VLIB_TX];
540 lb0 = load_balance_get (lbi0);
541 lb1 = load_balance_get (lbi1);
544 * this node is for via FIBs we can re-use the hash value from the
545 * to node if present.
546 * We don't want to use the same hash value at each level in the recursion
547 * graph as that would lead to polarisation
551 if (PREDICT_FALSE (lb0->lb_n_buckets > 1))
553 if (PREDICT_TRUE (vnet_buffer (p0)->ip.flow_hash))
555 hc0 = vnet_buffer (p0)->ip.flow_hash =
556 vnet_buffer (p0)->ip.flow_hash >> 1;
560 hc0 = vnet_buffer (p0)->ip.flow_hash =
561 ip6_compute_flow_hash (ip0, lb0->lb_hash_config);
564 load_balance_get_fwd_bucket (lb0,
566 lb0->lb_n_buckets_minus_1));
570 dpo0 = load_balance_get_bucket_i (lb0, 0);
572 if (PREDICT_FALSE (lb1->lb_n_buckets > 1))
574 if (PREDICT_TRUE (vnet_buffer (p1)->ip.flow_hash))
576 hc1 = vnet_buffer (p1)->ip.flow_hash =
577 vnet_buffer (p1)->ip.flow_hash >> 1;
581 hc1 = vnet_buffer (p1)->ip.flow_hash =
582 ip6_compute_flow_hash (ip1, lb1->lb_hash_config);
585 load_balance_get_fwd_bucket (lb1,
587 lb1->lb_n_buckets_minus_1));
591 dpo1 = load_balance_get_bucket_i (lb1, 0);
594 next0 = dpo0->dpoi_next_node;
595 next1 = dpo1->dpoi_next_node;
597 /* Only process the HBH Option Header if explicitly configured to do so */
599 (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
601 next0 = (dpo_is_adj (dpo0) && im->hbh_enabled) ?
602 (ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next0;
604 /* Only process the HBH Option Header if explicitly configured to do so */
606 (ip1->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
608 next1 = (dpo_is_adj (dpo1) && im->hbh_enabled) ?
609 (ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next1;
612 vnet_buffer (p0)->ip.adj_index[VLIB_TX] = dpo0->dpoi_index;
613 vnet_buffer (p1)->ip.adj_index[VLIB_TX] = dpo1->dpoi_index;
615 vlib_increment_combined_counter
616 (cm, thread_index, lbi0, 1, vlib_buffer_length_in_chain (vm, p0));
617 vlib_increment_combined_counter
618 (cm, thread_index, lbi1, 1, vlib_buffer_length_in_chain (vm, p1));
620 vlib_validate_buffer_enqueue_x2 (vm, node, next,
621 to_next, n_left_to_next,
622 pi0, pi1, next0, next1);
625 while (n_left_from > 0 && n_left_to_next > 0)
627 ip_lookup_next_t next0;
628 const load_balance_t *lb0;
631 const ip6_header_t *ip0;
632 const dpo_id_t *dpo0;
641 p0 = vlib_get_buffer (vm, pi0);
643 ip0 = vlib_buffer_get_current (p0);
644 lbi0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
646 lb0 = load_balance_get (lbi0);
649 if (PREDICT_FALSE (lb0->lb_n_buckets > 1))
651 if (PREDICT_TRUE (vnet_buffer (p0)->ip.flow_hash))
653 hc0 = vnet_buffer (p0)->ip.flow_hash =
654 vnet_buffer (p0)->ip.flow_hash >> 1;
658 hc0 = vnet_buffer (p0)->ip.flow_hash =
659 ip6_compute_flow_hash (ip0, lb0->lb_hash_config);
662 load_balance_get_fwd_bucket (lb0,
664 lb0->lb_n_buckets_minus_1));
668 dpo0 = load_balance_get_bucket_i (lb0, 0);
671 next0 = dpo0->dpoi_next_node;
672 vnet_buffer (p0)->ip.adj_index[VLIB_TX] = dpo0->dpoi_index;
674 /* Only process the HBH Option Header if explicitly configured to do so */
676 (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
678 next0 = (dpo_is_adj (dpo0) && im->hbh_enabled) ?
679 (ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next0;
682 vlib_increment_combined_counter
683 (cm, thread_index, lbi0, 1, vlib_buffer_length_in_chain (vm, p0));
685 vlib_validate_buffer_enqueue_x1 (vm, node, next,
686 to_next, n_left_to_next,
690 vlib_put_next_frame (vm, node, next, n_left_to_next);
693 return frame->n_vectors;
697 VLIB_REGISTER_NODE (ip6_load_balance_node) =
699 .function = ip6_load_balance,
700 .name = "ip6-load-balance",
701 .vector_size = sizeof (u32),
702 .sibling_of = "ip6-lookup",
703 .format_trace = format_ip6_lookup_trace,
707 VLIB_NODE_FUNCTION_MULTIARCH (ip6_load_balance_node, ip6_load_balance);
711 /* Adjacency taken. */
716 /* Packet data, possibly *after* rewrite. */
717 u8 packet_data[128 - 1 * sizeof (u32)];
719 ip6_forward_next_trace_t;
722 format_ip6_forward_next_trace (u8 * s, va_list * args)
724 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
725 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
726 ip6_forward_next_trace_t *t = va_arg (*args, ip6_forward_next_trace_t *);
727 u32 indent = format_get_indent (s);
729 s = format (s, "%U%U",
730 format_white_space, indent,
731 format_ip6_header, t->packet_data, sizeof (t->packet_data));
736 format_ip6_lookup_trace (u8 * s, va_list * args)
738 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
739 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
740 ip6_forward_next_trace_t *t = va_arg (*args, ip6_forward_next_trace_t *);
741 u32 indent = format_get_indent (s);
743 s = format (s, "fib %d dpo-idx %d flow hash: 0x%08x",
744 t->fib_index, t->adj_index, t->flow_hash);
745 s = format (s, "\n%U%U",
746 format_white_space, indent,
747 format_ip6_header, t->packet_data, sizeof (t->packet_data));
753 format_ip6_rewrite_trace (u8 * s, va_list * args)
755 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
756 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
757 ip6_forward_next_trace_t *t = va_arg (*args, ip6_forward_next_trace_t *);
758 u32 indent = format_get_indent (s);
760 s = format (s, "tx_sw_if_index %d adj-idx %d : %U flow hash: 0x%08x",
761 t->fib_index, t->adj_index, format_ip_adjacency,
762 t->adj_index, FORMAT_IP_ADJACENCY_NONE, t->flow_hash);
763 s = format (s, "\n%U%U",
764 format_white_space, indent,
765 format_ip_adjacency_packet_data,
766 t->adj_index, t->packet_data, sizeof (t->packet_data));
770 /* Common trace function for all ip6-forward next nodes. */
772 ip6_forward_next_trace (vlib_main_t * vm,
773 vlib_node_runtime_t * node,
774 vlib_frame_t * frame, vlib_rx_or_tx_t which_adj_index)
777 ip6_main_t *im = &ip6_main;
779 n_left = frame->n_vectors;
780 from = vlib_frame_vector_args (frame);
785 vlib_buffer_t *b0, *b1;
786 ip6_forward_next_trace_t *t0, *t1;
788 /* Prefetch next iteration. */
789 vlib_prefetch_buffer_with_index (vm, from[2], LOAD);
790 vlib_prefetch_buffer_with_index (vm, from[3], LOAD);
795 b0 = vlib_get_buffer (vm, bi0);
796 b1 = vlib_get_buffer (vm, bi1);
798 if (b0->flags & VLIB_BUFFER_IS_TRACED)
800 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
801 t0->adj_index = vnet_buffer (b0)->ip.adj_index[which_adj_index];
802 t0->flow_hash = vnet_buffer (b0)->ip.flow_hash;
804 (vnet_buffer (b0)->sw_if_index[VLIB_TX] !=
805 (u32) ~ 0) ? vnet_buffer (b0)->sw_if_index[VLIB_TX] :
806 vec_elt (im->fib_index_by_sw_if_index,
807 vnet_buffer (b0)->sw_if_index[VLIB_RX]);
809 clib_memcpy (t0->packet_data,
810 vlib_buffer_get_current (b0),
811 sizeof (t0->packet_data));
813 if (b1->flags & VLIB_BUFFER_IS_TRACED)
815 t1 = vlib_add_trace (vm, node, b1, sizeof (t1[0]));
816 t1->adj_index = vnet_buffer (b1)->ip.adj_index[which_adj_index];
817 t1->flow_hash = vnet_buffer (b1)->ip.flow_hash;
819 (vnet_buffer (b1)->sw_if_index[VLIB_TX] !=
820 (u32) ~ 0) ? vnet_buffer (b1)->sw_if_index[VLIB_TX] :
821 vec_elt (im->fib_index_by_sw_if_index,
822 vnet_buffer (b1)->sw_if_index[VLIB_RX]);
824 clib_memcpy (t1->packet_data,
825 vlib_buffer_get_current (b1),
826 sizeof (t1->packet_data));
836 ip6_forward_next_trace_t *t0;
840 b0 = vlib_get_buffer (vm, bi0);
842 if (b0->flags & VLIB_BUFFER_IS_TRACED)
844 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
845 t0->adj_index = vnet_buffer (b0)->ip.adj_index[which_adj_index];
846 t0->flow_hash = vnet_buffer (b0)->ip.flow_hash;
848 (vnet_buffer (b0)->sw_if_index[VLIB_TX] !=
849 (u32) ~ 0) ? vnet_buffer (b0)->sw_if_index[VLIB_TX] :
850 vec_elt (im->fib_index_by_sw_if_index,
851 vnet_buffer (b0)->sw_if_index[VLIB_RX]);
853 clib_memcpy (t0->packet_data,
854 vlib_buffer_get_current (b0),
855 sizeof (t0->packet_data));
862 /* Compute TCP/UDP/ICMP6 checksum in software. */
864 ip6_tcp_udp_icmp_compute_checksum (vlib_main_t * vm, vlib_buffer_t * p0,
865 ip6_header_t * ip0, int *bogus_lengthp)
868 u16 sum16, payload_length_host_byte_order;
869 u32 i, n_this_buffer, n_bytes_left;
870 u32 headers_size = sizeof (ip0[0]);
871 void *data_this_buffer;
873 ASSERT (bogus_lengthp);
876 /* Initialize checksum with ip header. */
877 sum0 = ip0->payload_length + clib_host_to_net_u16 (ip0->protocol);
878 payload_length_host_byte_order = clib_net_to_host_u16 (ip0->payload_length);
879 data_this_buffer = (void *) (ip0 + 1);
881 for (i = 0; i < ARRAY_LEN (ip0->src_address.as_uword); i++)
883 sum0 = ip_csum_with_carry (sum0,
884 clib_mem_unaligned (&ip0->
885 src_address.as_uword[i],
888 ip_csum_with_carry (sum0,
889 clib_mem_unaligned (&ip0->dst_address.as_uword[i],
893 /* some icmp packets may come with a "router alert" hop-by-hop extension header (e.g., mldv2 packets)
894 * or UDP-Ping packets */
895 if (PREDICT_FALSE (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
898 ip6_hop_by_hop_ext_t *ext_hdr =
899 (ip6_hop_by_hop_ext_t *) data_this_buffer;
901 /* validate really icmp6 next */
902 ASSERT ((ext_hdr->next_hdr == IP_PROTOCOL_ICMP6)
903 || (ext_hdr->next_hdr == IP_PROTOCOL_UDP));
905 skip_bytes = 8 * (1 + ext_hdr->n_data_u64s);
906 data_this_buffer = (void *) ((u8 *) data_this_buffer + skip_bytes);
908 payload_length_host_byte_order -= skip_bytes;
909 headers_size += skip_bytes;
912 n_bytes_left = n_this_buffer = payload_length_host_byte_order;
913 if (p0 && n_this_buffer + headers_size > p0->current_length)
916 headers_size ? p0->current_length - headers_size : 0;
919 sum0 = ip_incremental_checksum (sum0, data_this_buffer, n_this_buffer);
920 n_bytes_left -= n_this_buffer;
921 if (n_bytes_left == 0)
924 if (!(p0->flags & VLIB_BUFFER_NEXT_PRESENT))
929 p0 = vlib_get_buffer (vm, p0->next_buffer);
930 data_this_buffer = vlib_buffer_get_current (p0);
931 n_this_buffer = p0->current_length;
934 sum16 = ~ip_csum_fold (sum0);
940 ip6_tcp_udp_icmp_validate_checksum (vlib_main_t * vm, vlib_buffer_t * p0)
942 ip6_header_t *ip0 = vlib_buffer_get_current (p0);
947 /* some icmp packets may come with a "router alert" hop-by-hop extension header (e.g., mldv2 packets) */
948 ASSERT (ip0->protocol == IP_PROTOCOL_TCP
949 || ip0->protocol == IP_PROTOCOL_ICMP6
950 || ip0->protocol == IP_PROTOCOL_UDP
951 || ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS);
953 udp0 = (void *) (ip0 + 1);
954 if (ip0->protocol == IP_PROTOCOL_UDP && udp0->checksum == 0)
956 p0->flags |= (VNET_BUFFER_F_L4_CHECKSUM_COMPUTED
957 | VNET_BUFFER_F_L4_CHECKSUM_CORRECT);
961 sum16 = ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip0, &bogus_length);
963 p0->flags |= (VNET_BUFFER_F_L4_CHECKSUM_COMPUTED
964 | ((sum16 == 0) << VNET_BUFFER_F_LOG2_L4_CHECKSUM_CORRECT));
970 * @brief returns number of links on which src is reachable.
973 ip6_urpf_loose_check (ip6_main_t * im, vlib_buffer_t * b, ip6_header_t * i)
975 const load_balance_t *lb0;
978 lbi = ip6_fib_table_fwding_lookup_with_if_index (im,
980 (b)->sw_if_index[VLIB_RX],
983 lb0 = load_balance_get (lbi);
985 return (fib_urpf_check_size (lb0->lb_urpf));
989 ip6_next_proto_is_tcp_udp (vlib_buffer_t * p0, ip6_header_t * ip0,
993 proto0 = ip6_locate_header (p0, ip0, IP_PROTOCOL_UDP, udp_offset0);
994 if (proto0 != IP_PROTOCOL_UDP)
996 proto0 = ip6_locate_header (p0, ip0, IP_PROTOCOL_TCP, udp_offset0);
997 proto0 = (proto0 == IP_PROTOCOL_TCP) ? proto0 : 0;
1003 VNET_FEATURE_ARC_INIT (ip6_local) =
1005 .arc_name = "ip6-local",
1006 .start_nodes = VNET_FEATURES ("ip6-local"),
1011 ip6_local_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
1012 vlib_frame_t * frame, int head_of_feature_arc)
1014 ip6_main_t *im = &ip6_main;
1015 ip_lookup_main_t *lm = &im->lookup_main;
1016 ip_local_next_t next_index;
1017 u32 *from, *to_next, n_left_from, n_left_to_next;
1018 vlib_node_runtime_t *error_node =
1019 vlib_node_get_runtime (vm, ip6_input_node.index);
1020 u8 arc_index = vnet_feat_arc_ip6_local.feature_arc_index;
1022 from = vlib_frame_vector_args (frame);
1023 n_left_from = frame->n_vectors;
1024 next_index = node->cached_next_index;
1026 if (node->flags & VLIB_NODE_FLAG_TRACE)
1027 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
1029 while (n_left_from > 0)
1031 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1033 while (n_left_from >= 4 && n_left_to_next >= 2)
1035 vlib_buffer_t *p0, *p1;
1036 ip6_header_t *ip0, *ip1;
1037 udp_header_t *udp0, *udp1;
1038 u32 pi0, ip_len0, udp_len0, flags0, next0;
1039 u32 pi1, ip_len1, udp_len1, flags1, next1;
1040 i32 len_diff0, len_diff1;
1041 u8 error0, type0, good_l4_csum0, is_tcp_udp0;
1042 u8 error1, type1, good_l4_csum1, is_tcp_udp1;
1043 u32 udp_offset0, udp_offset1;
1045 pi0 = to_next[0] = from[0];
1046 pi1 = to_next[1] = from[1];
1050 n_left_to_next -= 2;
1052 error0 = error1 = IP6_ERROR_UNKNOWN_PROTOCOL;
1054 p0 = vlib_get_buffer (vm, pi0);
1055 p1 = vlib_get_buffer (vm, pi1);
1057 ip0 = vlib_buffer_get_current (p0);
1058 ip1 = vlib_buffer_get_current (p1);
1060 if (head_of_feature_arc == 0)
1063 vnet_buffer (p0)->l3_hdr_offset = p0->current_data;
1064 vnet_buffer (p1)->l3_hdr_offset = p1->current_data;
1066 type0 = lm->builtin_protocol_by_ip_protocol[ip0->protocol];
1067 type1 = lm->builtin_protocol_by_ip_protocol[ip1->protocol];
1072 is_tcp_udp0 = ip6_next_proto_is_tcp_udp (p0, ip0, &udp_offset0);
1073 is_tcp_udp1 = ip6_next_proto_is_tcp_udp (p1, ip1, &udp_offset1);
1075 good_l4_csum0 = (flags0 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT
1076 || (flags0 & VNET_BUFFER_F_OFFLOAD_TCP_CKSUM
1077 || flags0 & VNET_BUFFER_F_OFFLOAD_UDP_CKSUM))
1079 good_l4_csum1 = (flags1 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT
1080 || (flags1 & VNET_BUFFER_F_OFFLOAD_TCP_CKSUM
1081 || flags1 & VNET_BUFFER_F_OFFLOAD_UDP_CKSUM))
1086 if (PREDICT_TRUE (is_tcp_udp0))
1088 udp0 = (udp_header_t *) ((u8 *) ip0 + udp_offset0);
1089 /* Don't verify UDP checksum for packets with explicit zero checksum. */
1090 good_l4_csum0 |= type0 == IP_BUILTIN_PROTOCOL_UDP
1091 && udp0->checksum == 0;
1092 /* Verify UDP length. */
1093 if (is_tcp_udp0 == IP_PROTOCOL_UDP)
1095 ip_len0 = clib_net_to_host_u16 (ip0->payload_length);
1096 udp_len0 = clib_net_to_host_u16 (udp0->length);
1097 len_diff0 = ip_len0 - udp_len0;
1100 if (PREDICT_TRUE (is_tcp_udp1))
1102 udp1 = (udp_header_t *) ((u8 *) ip1 + udp_offset1);
1103 /* Don't verify UDP checksum for packets with explicit zero checksum. */
1104 good_l4_csum1 |= type1 == IP_BUILTIN_PROTOCOL_UDP
1105 && udp1->checksum == 0;
1106 /* Verify UDP length. */
1107 if (is_tcp_udp1 == IP_PROTOCOL_UDP)
1109 ip_len1 = clib_net_to_host_u16 (ip1->payload_length);
1110 udp_len1 = clib_net_to_host_u16 (udp1->length);
1111 len_diff1 = ip_len1 - udp_len1;
1115 good_l4_csum0 |= type0 == IP_BUILTIN_PROTOCOL_UNKNOWN;
1116 good_l4_csum1 |= type1 == IP_BUILTIN_PROTOCOL_UNKNOWN;
1118 len_diff0 = type0 == IP_BUILTIN_PROTOCOL_UDP ? len_diff0 : 0;
1119 len_diff1 = type1 == IP_BUILTIN_PROTOCOL_UDP ? len_diff1 : 0;
1121 if (PREDICT_FALSE (type0 != IP_BUILTIN_PROTOCOL_UNKNOWN
1124 VNET_BUFFER_F_L4_CHECKSUM_COMPUTED)))
1126 flags0 = ip6_tcp_udp_icmp_validate_checksum (vm, p0);
1128 (flags0 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0;
1130 if (PREDICT_FALSE (type1 != IP_BUILTIN_PROTOCOL_UNKNOWN
1133 VNET_BUFFER_F_L4_CHECKSUM_COMPUTED)))
1135 flags1 = ip6_tcp_udp_icmp_validate_checksum (vm, p1);
1137 (flags1 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0;
1140 error0 = error1 = IP6_ERROR_UNKNOWN_PROTOCOL;
1141 error0 = len_diff0 < 0 ? IP6_ERROR_UDP_LENGTH : error0;
1142 error1 = len_diff1 < 0 ? IP6_ERROR_UDP_LENGTH : error1;
1144 ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_UDP ==
1145 IP6_ERROR_UDP_CHECKSUM);
1146 ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_ICMP ==
1147 IP6_ERROR_ICMP_CHECKSUM);
1148 error0 = (!good_l4_csum0 ? IP6_ERROR_UDP_CHECKSUM + type0 : error0);
1149 error1 = (!good_l4_csum1 ? IP6_ERROR_UDP_CHECKSUM + type1 : error1);
1151 /* Drop packets from unroutable hosts. */
1152 /* If this is a neighbor solicitation (ICMP), skip source RPF check */
1153 if (error0 == IP6_ERROR_UNKNOWN_PROTOCOL &&
1154 type0 != IP_BUILTIN_PROTOCOL_ICMP &&
1155 !ip6_address_is_link_local_unicast (&ip0->src_address))
1157 error0 = (!ip6_urpf_loose_check (im, p0, ip0)
1158 ? IP6_ERROR_SRC_LOOKUP_MISS : error0);
1160 if (error1 == IP6_ERROR_UNKNOWN_PROTOCOL &&
1161 type1 != IP_BUILTIN_PROTOCOL_ICMP &&
1162 !ip6_address_is_link_local_unicast (&ip1->src_address))
1164 error1 = (!ip6_urpf_loose_check (im, p1, ip1)
1165 ? IP6_ERROR_SRC_LOOKUP_MISS : error1);
1168 /* TODO maybe move to lookup? */
1169 vnet_buffer (p0)->ip.fib_index =
1170 vec_elt (im->fib_index_by_sw_if_index,
1171 vnet_buffer (p0)->sw_if_index[VLIB_RX]);
1172 vnet_buffer (p0)->ip.fib_index =
1173 (vnet_buffer (p0)->sw_if_index[VLIB_TX] ==
1174 (u32) ~ 0) ? vnet_buffer (p0)->ip.
1175 fib_index : vnet_buffer (p0)->sw_if_index[VLIB_TX];
1177 vnet_buffer (p1)->ip.fib_index =
1178 vec_elt (im->fib_index_by_sw_if_index,
1179 vnet_buffer (p1)->sw_if_index[VLIB_RX]);
1180 vnet_buffer (p1)->ip.fib_index =
1181 (vnet_buffer (p1)->sw_if_index[VLIB_TX] ==
1182 (u32) ~ 0) ? vnet_buffer (p1)->ip.
1183 fib_index : vnet_buffer (p1)->sw_if_index[VLIB_TX];
1188 next0 = lm->local_next_by_ip_protocol[ip0->protocol];
1189 next1 = lm->local_next_by_ip_protocol[ip1->protocol];
1192 error0 != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next0;
1194 error1 != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next1;
1196 p0->error = error_node->errors[error0];
1197 p1->error = error_node->errors[error1];
1199 if (head_of_feature_arc)
1201 if (PREDICT_TRUE (error0 == (u8) IP6_ERROR_UNKNOWN_PROTOCOL))
1202 vnet_feature_arc_start (arc_index,
1203 vnet_buffer (p0)->sw_if_index
1204 [VLIB_RX], &next0, p0);
1205 if (PREDICT_TRUE (error1 == (u8) IP6_ERROR_UNKNOWN_PROTOCOL))
1206 vnet_feature_arc_start (arc_index,
1207 vnet_buffer (p1)->sw_if_index
1208 [VLIB_RX], &next1, p1);
1211 vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
1212 to_next, n_left_to_next,
1213 pi0, pi1, next0, next1);
1216 while (n_left_from > 0 && n_left_to_next > 0)
1221 u32 pi0, ip_len0, udp_len0, flags0, next0;
1223 u8 error0, type0, good_l4_csum0;
1227 pi0 = to_next[0] = from[0];
1231 n_left_to_next -= 1;
1233 error0 = IP6_ERROR_UNKNOWN_PROTOCOL;
1235 p0 = vlib_get_buffer (vm, pi0);
1236 ip0 = vlib_buffer_get_current (p0);
1238 if (head_of_feature_arc == 0)
1241 vnet_buffer (p0)->l3_hdr_offset = p0->current_data;
1243 type0 = lm->builtin_protocol_by_ip_protocol[ip0->protocol];
1245 is_tcp_udp0 = ip6_next_proto_is_tcp_udp (p0, ip0, &udp_offset0);
1246 good_l4_csum0 = (flags0 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT
1247 || (flags0 & VNET_BUFFER_F_OFFLOAD_TCP_CKSUM
1248 || flags0 & VNET_BUFFER_F_OFFLOAD_UDP_CKSUM))
1252 if (PREDICT_TRUE (is_tcp_udp0))
1254 udp0 = (udp_header_t *) ((u8 *) ip0 + udp_offset0);
1255 /* Don't verify UDP checksum for packets with explicit zero
1257 good_l4_csum0 |= type0 == IP_BUILTIN_PROTOCOL_UDP
1258 && udp0->checksum == 0;
1259 /* Verify UDP length. */
1260 if (is_tcp_udp0 == IP_PROTOCOL_UDP)
1262 ip_len0 = clib_net_to_host_u16 (ip0->payload_length);
1263 udp_len0 = clib_net_to_host_u16 (udp0->length);
1264 len_diff0 = ip_len0 - udp_len0;
1268 good_l4_csum0 |= type0 == IP_BUILTIN_PROTOCOL_UNKNOWN;
1269 len_diff0 = type0 == IP_BUILTIN_PROTOCOL_UDP ? len_diff0 : 0;
1271 if (PREDICT_FALSE (type0 != IP_BUILTIN_PROTOCOL_UNKNOWN
1274 VNET_BUFFER_F_L4_CHECKSUM_COMPUTED)))
1276 flags0 = ip6_tcp_udp_icmp_validate_checksum (vm, p0);
1278 (flags0 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0;
1281 error0 = IP6_ERROR_UNKNOWN_PROTOCOL;
1282 error0 = len_diff0 < 0 ? IP6_ERROR_UDP_LENGTH : error0;
1284 ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_UDP ==
1285 IP6_ERROR_UDP_CHECKSUM);
1286 ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_ICMP ==
1287 IP6_ERROR_ICMP_CHECKSUM);
1288 error0 = (!good_l4_csum0 ? IP6_ERROR_UDP_CHECKSUM + type0 : error0);
1290 /* If this is a neighbor solicitation (ICMP), skip src RPF check */
1291 if (error0 == IP6_ERROR_UNKNOWN_PROTOCOL &&
1292 type0 != IP_BUILTIN_PROTOCOL_ICMP &&
1293 !ip6_address_is_link_local_unicast (&ip0->src_address))
1295 error0 = (!ip6_urpf_loose_check (im, p0, ip0)
1296 ? IP6_ERROR_SRC_LOOKUP_MISS : error0);
1299 vnet_buffer (p0)->ip.fib_index =
1300 vec_elt (im->fib_index_by_sw_if_index,
1301 vnet_buffer (p0)->sw_if_index[VLIB_RX]);
1302 vnet_buffer (p0)->ip.fib_index =
1303 (vnet_buffer (p0)->sw_if_index[VLIB_TX] ==
1304 (u32) ~ 0) ? vnet_buffer (p0)->ip.
1305 fib_index : vnet_buffer (p0)->sw_if_index[VLIB_TX];
1309 next0 = lm->local_next_by_ip_protocol[ip0->protocol];
1311 error0 != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next0;
1313 p0->error = error_node->errors[error0];
1315 if (head_of_feature_arc)
1317 if (PREDICT_TRUE (error0 == (u8) IP6_ERROR_UNKNOWN_PROTOCOL))
1318 vnet_feature_arc_start (arc_index,
1319 vnet_buffer (p0)->sw_if_index
1320 [VLIB_RX], &next0, p0);
1323 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1324 to_next, n_left_to_next,
1328 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1331 return frame->n_vectors;
1335 ip6_local (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
1337 return ip6_local_inline (vm, node, frame, 1 /* head of feature arc */ );
1341 VLIB_REGISTER_NODE (ip6_local_node, static) =
1343 .function = ip6_local,
1344 .name = "ip6-local",
1345 .vector_size = sizeof (u32),
1346 .format_trace = format_ip6_forward_next_trace,
1347 .n_next_nodes = IP_LOCAL_N_NEXT,
1350 [IP_LOCAL_NEXT_DROP] = "ip6-drop",
1351 [IP_LOCAL_NEXT_PUNT] = "ip6-punt",
1352 [IP_LOCAL_NEXT_UDP_LOOKUP] = "ip6-udp-lookup",
1353 [IP_LOCAL_NEXT_ICMP] = "ip6-icmp-input",
1354 [IP_LOCAL_NEXT_REASSEMBLY] = "ip6-reassembly",
1359 VLIB_NODE_FUNCTION_MULTIARCH (ip6_local_node, ip6_local);
1363 ip6_local_end_of_arc (vlib_main_t * vm,
1364 vlib_node_runtime_t * node, vlib_frame_t * frame)
1366 return ip6_local_inline (vm, node, frame, 0 /* head of feature arc */ );
1370 VLIB_REGISTER_NODE (ip6_local_end_of_arc_node,static) = {
1371 .function = ip6_local_end_of_arc,
1372 .name = "ip6-local-end-of-arc",
1373 .vector_size = sizeof (u32),
1375 .format_trace = format_ip6_forward_next_trace,
1376 .sibling_of = "ip6-local",
1379 VLIB_NODE_FUNCTION_MULTIARCH (ip6_local_end_of_arc_node, ip6_local_end_of_arc)
1381 VNET_FEATURE_INIT (ip6_local_end_of_arc, static) = {
1382 .arc_name = "ip6-local",
1383 .node_name = "ip6-local-end-of-arc",
1384 .runs_before = 0, /* not before any other features */
1389 ip6_register_protocol (u32 protocol, u32 node_index)
1391 vlib_main_t *vm = vlib_get_main ();
1392 ip6_main_t *im = &ip6_main;
1393 ip_lookup_main_t *lm = &im->lookup_main;
1395 ASSERT (protocol < ARRAY_LEN (lm->local_next_by_ip_protocol));
1396 lm->local_next_by_ip_protocol[protocol] =
1397 vlib_node_add_next (vm, ip6_local_node.index, node_index);
1402 IP6_DISCOVER_NEIGHBOR_NEXT_DROP,
1403 IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX,
1404 IP6_DISCOVER_NEIGHBOR_N_NEXT,
1405 } ip6_discover_neighbor_next_t;
1409 IP6_DISCOVER_NEIGHBOR_ERROR_DROP,
1410 IP6_DISCOVER_NEIGHBOR_ERROR_REQUEST_SENT,
1411 IP6_DISCOVER_NEIGHBOR_ERROR_NO_SOURCE_ADDRESS,
1412 } ip6_discover_neighbor_error_t;
1415 ip6_discover_neighbor_inline (vlib_main_t * vm,
1416 vlib_node_runtime_t * node,
1417 vlib_frame_t * frame, int is_glean)
1419 vnet_main_t *vnm = vnet_get_main ();
1420 ip6_main_t *im = &ip6_main;
1421 ip_lookup_main_t *lm = &im->lookup_main;
1422 u32 *from, *to_next_drop;
1423 uword n_left_from, n_left_to_next_drop;
1424 static f64 time_last_seed_change = -1e100;
1425 static u32 hash_seeds[3];
1426 static uword hash_bitmap[256 / BITS (uword)];
1430 if (node->flags & VLIB_NODE_FLAG_TRACE)
1431 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
1433 time_now = vlib_time_now (vm);
1434 if (time_now - time_last_seed_change > 1e-3)
1437 u32 *r = clib_random_buffer_get_data (&vm->random_buffer,
1438 sizeof (hash_seeds));
1439 for (i = 0; i < ARRAY_LEN (hash_seeds); i++)
1440 hash_seeds[i] = r[i];
1442 /* Mark all hash keys as been not-seen before. */
1443 for (i = 0; i < ARRAY_LEN (hash_bitmap); i++)
1446 time_last_seed_change = time_now;
1449 from = vlib_frame_vector_args (frame);
1450 n_left_from = frame->n_vectors;
1452 while (n_left_from > 0)
1454 vlib_get_next_frame (vm, node, IP6_DISCOVER_NEIGHBOR_NEXT_DROP,
1455 to_next_drop, n_left_to_next_drop);
1457 while (n_left_from > 0 && n_left_to_next_drop > 0)
1461 u32 pi0, adj_index0, a0, b0, c0, m0, sw_if_index0, drop0;
1463 ip_adjacency_t *adj0;
1464 vnet_hw_interface_t *hw_if0;
1469 p0 = vlib_get_buffer (vm, pi0);
1471 adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
1473 ip0 = vlib_buffer_get_current (p0);
1475 adj0 = adj_get (adj_index0);
1479 ip0->dst_address.as_u64[0] =
1480 adj0->sub_type.nbr.next_hop.ip6.as_u64[0];
1481 ip0->dst_address.as_u64[1] =
1482 adj0->sub_type.nbr.next_hop.ip6.as_u64[1];
1489 sw_if_index0 = adj0->rewrite_header.sw_if_index;
1490 vnet_buffer (p0)->sw_if_index[VLIB_TX] = sw_if_index0;
1493 b0 ^= ip0->dst_address.as_u32[0];
1494 c0 ^= ip0->dst_address.as_u32[1];
1496 hash_v3_mix32 (a0, b0, c0);
1498 b0 ^= ip0->dst_address.as_u32[2];
1499 c0 ^= ip0->dst_address.as_u32[3];
1501 hash_v3_finalize32 (a0, b0, c0);
1503 c0 &= BITS (hash_bitmap) - 1;
1504 c0 = c0 / BITS (uword);
1505 m0 = (uword) 1 << (c0 % BITS (uword));
1507 bm0 = hash_bitmap[c0];
1508 drop0 = (bm0 & m0) != 0;
1510 /* Mark it as seen. */
1511 hash_bitmap[c0] = bm0 | m0;
1515 to_next_drop[0] = pi0;
1517 n_left_to_next_drop -= 1;
1519 hw_if0 = vnet_get_sup_hw_interface (vnm, sw_if_index0);
1521 /* If the interface is link-down, drop the pkt */
1522 if (!(hw_if0->flags & VNET_HW_INTERFACE_FLAG_LINK_UP))
1526 node->errors[drop0 ? IP6_DISCOVER_NEIGHBOR_ERROR_DROP
1527 : IP6_DISCOVER_NEIGHBOR_ERROR_REQUEST_SENT];
1532 * the adj has been updated to a rewrite but the node the DPO that got
1533 * us here hasn't - yet. no big deal. we'll drop while we wait.
1535 if (IP_LOOKUP_NEXT_REWRITE == adj0->lookup_next_index)
1540 icmp6_neighbor_solicitation_header_t *h0;
1543 h0 = vlib_packet_template_get_packet
1544 (vm, &im->discover_neighbor_packet_template, &bi0);
1547 * Build ethernet header.
1548 * Choose source address based on destination lookup
1551 if (ip6_src_address_for_packet (lm,
1553 &h0->ip.src_address))
1555 /* There is no address on the interface */
1557 node->errors[IP6_DISCOVER_NEIGHBOR_ERROR_NO_SOURCE_ADDRESS];
1558 vlib_buffer_free (vm, &bi0, 1);
1563 * Destination address is a solicited node multicast address.
1564 * We need to fill in
1565 * the low 24 bits with low 24 bits of target's address.
1567 h0->ip.dst_address.as_u8[13] = ip0->dst_address.as_u8[13];
1568 h0->ip.dst_address.as_u8[14] = ip0->dst_address.as_u8[14];
1569 h0->ip.dst_address.as_u8[15] = ip0->dst_address.as_u8[15];
1571 h0->neighbor.target_address = ip0->dst_address;
1573 clib_memcpy (h0->link_layer_option.ethernet_address,
1574 hw_if0->hw_address, vec_len (hw_if0->hw_address));
1576 /* $$$$ appears we need this; why is the checksum non-zero? */
1577 h0->neighbor.icmp.checksum = 0;
1578 h0->neighbor.icmp.checksum =
1579 ip6_tcp_udp_icmp_compute_checksum (vm, 0, &h0->ip,
1582 ASSERT (bogus_length == 0);
1584 vlib_buffer_copy_trace_flag (vm, p0, bi0);
1585 b0 = vlib_get_buffer (vm, bi0);
1586 vnet_buffer (b0)->sw_if_index[VLIB_TX]
1587 = vnet_buffer (p0)->sw_if_index[VLIB_TX];
1589 /* Add rewrite/encap string. */
1590 vnet_rewrite_one_header (adj0[0], h0, sizeof (ethernet_header_t));
1591 vlib_buffer_advance (b0, -adj0->rewrite_header.data_bytes);
1593 next0 = IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX;
1595 vlib_set_next_frame_buffer (vm, node, next0, bi0);
1599 vlib_put_next_frame (vm, node, IP6_DISCOVER_NEIGHBOR_NEXT_DROP,
1600 n_left_to_next_drop);
1603 return frame->n_vectors;
1607 ip6_discover_neighbor (vlib_main_t * vm,
1608 vlib_node_runtime_t * node, vlib_frame_t * frame)
1610 return (ip6_discover_neighbor_inline (vm, node, frame, 0));
1614 ip6_glean (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
1616 return (ip6_discover_neighbor_inline (vm, node, frame, 1));
1619 static char *ip6_discover_neighbor_error_strings[] = {
1620 [IP6_DISCOVER_NEIGHBOR_ERROR_DROP] = "address overflow drops",
1621 [IP6_DISCOVER_NEIGHBOR_ERROR_REQUEST_SENT] = "neighbor solicitations sent",
1622 [IP6_DISCOVER_NEIGHBOR_ERROR_NO_SOURCE_ADDRESS]
1623 = "no source address for ND solicitation",
1627 VLIB_REGISTER_NODE (ip6_discover_neighbor_node) =
1629 .function = ip6_discover_neighbor,
1630 .name = "ip6-discover-neighbor",
1631 .vector_size = sizeof (u32),
1632 .format_trace = format_ip6_forward_next_trace,
1633 .n_errors = ARRAY_LEN (ip6_discover_neighbor_error_strings),
1634 .error_strings = ip6_discover_neighbor_error_strings,
1635 .n_next_nodes = IP6_DISCOVER_NEIGHBOR_N_NEXT,
1638 [IP6_DISCOVER_NEIGHBOR_NEXT_DROP] = "ip6-drop",
1639 [IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX] = "interface-output",
1645 VLIB_REGISTER_NODE (ip6_glean_node) =
1647 .function = ip6_glean,
1648 .name = "ip6-glean",
1649 .vector_size = sizeof (u32),
1650 .format_trace = format_ip6_forward_next_trace,
1651 .n_errors = ARRAY_LEN (ip6_discover_neighbor_error_strings),
1652 .error_strings = ip6_discover_neighbor_error_strings,
1653 .n_next_nodes = IP6_DISCOVER_NEIGHBOR_N_NEXT,
1656 [IP6_DISCOVER_NEIGHBOR_NEXT_DROP] = "ip6-drop",
1657 [IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX] = "interface-output",
1663 ip6_probe_neighbor (vlib_main_t * vm, ip6_address_t * dst, u32 sw_if_index)
1665 vnet_main_t *vnm = vnet_get_main ();
1666 ip6_main_t *im = &ip6_main;
1667 icmp6_neighbor_solicitation_header_t *h;
1669 ip_interface_address_t *ia;
1670 ip_adjacency_t *adj;
1671 vnet_hw_interface_t *hi;
1672 vnet_sw_interface_t *si;
1678 si = vnet_get_sw_interface (vnm, sw_if_index);
1680 if (!(si->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP))
1682 return clib_error_return (0, "%U: interface %U down",
1683 format_ip6_address, dst,
1684 format_vnet_sw_if_index_name, vnm,
1689 ip6_interface_address_matching_destination (im, dst, sw_if_index, &ia);
1692 vnm->api_errno = VNET_API_ERROR_NO_MATCHING_INTERFACE;
1693 return clib_error_return
1694 (0, "no matching interface address for destination %U (interface %U)",
1695 format_ip6_address, dst,
1696 format_vnet_sw_if_index_name, vnm, sw_if_index);
1700 vlib_packet_template_get_packet (vm,
1701 &im->discover_neighbor_packet_template,
1704 hi = vnet_get_sup_hw_interface (vnm, sw_if_index);
1706 /* Destination address is a solicited node multicast address. We need to fill in
1707 the low 24 bits with low 24 bits of target's address. */
1708 h->ip.dst_address.as_u8[13] = dst->as_u8[13];
1709 h->ip.dst_address.as_u8[14] = dst->as_u8[14];
1710 h->ip.dst_address.as_u8[15] = dst->as_u8[15];
1712 h->ip.src_address = src[0];
1713 h->neighbor.target_address = dst[0];
1715 if (PREDICT_FALSE (!hi->hw_address))
1717 return clib_error_return (0, "%U: interface %U do not support ip probe",
1718 format_ip6_address, dst,
1719 format_vnet_sw_if_index_name, vnm,
1723 clib_memcpy (h->link_layer_option.ethernet_address, hi->hw_address,
1724 vec_len (hi->hw_address));
1726 h->neighbor.icmp.checksum =
1727 ip6_tcp_udp_icmp_compute_checksum (vm, 0, &h->ip, &bogus_length);
1728 ASSERT (bogus_length == 0);
1730 b = vlib_get_buffer (vm, bi);
1731 vnet_buffer (b)->sw_if_index[VLIB_RX] =
1732 vnet_buffer (b)->sw_if_index[VLIB_TX] = sw_if_index;
1734 /* Add encapsulation string for software interface (e.g. ethernet header). */
1735 ip46_address_t nh = {
1739 ai = adj_nbr_add_or_lock (FIB_PROTOCOL_IP6,
1740 VNET_LINK_IP6, &nh, sw_if_index);
1743 /* Peer has been previously resolved, retrieve glean adj instead */
1744 if (adj->lookup_next_index == IP_LOOKUP_NEXT_REWRITE)
1747 ai = adj_glean_add_or_lock (FIB_PROTOCOL_IP6, sw_if_index, &nh);
1751 vnet_rewrite_one_header (adj[0], h, sizeof (ethernet_header_t));
1752 vlib_buffer_advance (b, -adj->rewrite_header.data_bytes);
1755 vlib_frame_t *f = vlib_get_frame_to_node (vm, hi->output_node_index);
1756 u32 *to_next = vlib_frame_vector_args (f);
1759 vlib_put_frame_to_node (vm, hi->output_node_index, f);
1763 return /* no error */ 0;
1768 IP6_REWRITE_NEXT_DROP,
1769 IP6_REWRITE_NEXT_ICMP_ERROR,
1770 } ip6_rewrite_next_t;
1773 ip6_rewrite_inline (vlib_main_t * vm,
1774 vlib_node_runtime_t * node,
1775 vlib_frame_t * frame,
1776 int do_counters, int is_midchain, int is_mcast)
1778 ip_lookup_main_t *lm = &ip6_main.lookup_main;
1779 u32 *from = vlib_frame_vector_args (frame);
1780 u32 n_left_from, n_left_to_next, *to_next, next_index;
1781 vlib_node_runtime_t *error_node =
1782 vlib_node_get_runtime (vm, ip6_input_node.index);
1784 n_left_from = frame->n_vectors;
1785 next_index = node->cached_next_index;
1786 u32 thread_index = vlib_get_thread_index ();
1788 while (n_left_from > 0)
1790 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1792 while (n_left_from >= 4 && n_left_to_next >= 2)
1794 ip_adjacency_t *adj0, *adj1;
1795 vlib_buffer_t *p0, *p1;
1796 ip6_header_t *ip0, *ip1;
1797 u32 pi0, rw_len0, next0, error0, adj_index0;
1798 u32 pi1, rw_len1, next1, error1, adj_index1;
1799 u32 tx_sw_if_index0, tx_sw_if_index1;
1801 /* Prefetch next iteration. */
1803 vlib_buffer_t *p2, *p3;
1805 p2 = vlib_get_buffer (vm, from[2]);
1806 p3 = vlib_get_buffer (vm, from[3]);
1808 vlib_prefetch_buffer_header (p2, LOAD);
1809 vlib_prefetch_buffer_header (p3, LOAD);
1811 CLIB_PREFETCH (p2->pre_data, 32, STORE);
1812 CLIB_PREFETCH (p3->pre_data, 32, STORE);
1814 CLIB_PREFETCH (p2->data, sizeof (ip0[0]), STORE);
1815 CLIB_PREFETCH (p3->data, sizeof (ip0[0]), STORE);
1818 pi0 = to_next[0] = from[0];
1819 pi1 = to_next[1] = from[1];
1824 n_left_to_next -= 2;
1826 p0 = vlib_get_buffer (vm, pi0);
1827 p1 = vlib_get_buffer (vm, pi1);
1829 adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
1830 adj_index1 = vnet_buffer (p1)->ip.adj_index[VLIB_TX];
1832 ip0 = vlib_buffer_get_current (p0);
1833 ip1 = vlib_buffer_get_current (p1);
1835 error0 = error1 = IP6_ERROR_NONE;
1836 next0 = next1 = IP6_REWRITE_NEXT_DROP;
1838 if (PREDICT_TRUE (!(p0->flags & VNET_BUFFER_F_LOCALLY_ORIGINATED)))
1840 i32 hop_limit0 = ip0->hop_limit;
1842 /* Input node should have reject packets with hop limit 0. */
1843 ASSERT (ip0->hop_limit > 0);
1847 ip0->hop_limit = hop_limit0;
1850 * If the hop count drops below 1 when forwarding, generate
1853 if (PREDICT_FALSE (hop_limit0 <= 0))
1855 error0 = IP6_ERROR_TIME_EXPIRED;
1856 next0 = IP6_REWRITE_NEXT_ICMP_ERROR;
1857 vnet_buffer (p0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
1858 icmp6_error_set_vnet_buffer (p0, ICMP6_time_exceeded,
1859 ICMP6_time_exceeded_ttl_exceeded_in_transit,
1865 p0->flags &= ~VNET_BUFFER_F_LOCALLY_ORIGINATED;
1867 if (PREDICT_TRUE (!(p1->flags & VNET_BUFFER_F_LOCALLY_ORIGINATED)))
1869 i32 hop_limit1 = ip1->hop_limit;
1871 /* Input node should have reject packets with hop limit 0. */
1872 ASSERT (ip1->hop_limit > 0);
1876 ip1->hop_limit = hop_limit1;
1879 * If the hop count drops below 1 when forwarding, generate
1882 if (PREDICT_FALSE (hop_limit1 <= 0))
1884 error1 = IP6_ERROR_TIME_EXPIRED;
1885 next1 = IP6_REWRITE_NEXT_ICMP_ERROR;
1886 vnet_buffer (p1)->sw_if_index[VLIB_TX] = (u32) ~ 0;
1887 icmp6_error_set_vnet_buffer (p1, ICMP6_time_exceeded,
1888 ICMP6_time_exceeded_ttl_exceeded_in_transit,
1894 p1->flags &= ~VNET_BUFFER_F_LOCALLY_ORIGINATED;
1896 adj0 = adj_get (adj_index0);
1897 adj1 = adj_get (adj_index1);
1899 rw_len0 = adj0[0].rewrite_header.data_bytes;
1900 rw_len1 = adj1[0].rewrite_header.data_bytes;
1901 vnet_buffer (p0)->ip.save_rewrite_length = rw_len0;
1902 vnet_buffer (p1)->ip.save_rewrite_length = rw_len1;
1906 vlib_increment_combined_counter
1907 (&adjacency_counters,
1908 thread_index, adj_index0, 1,
1909 vlib_buffer_length_in_chain (vm, p0) + rw_len0);
1910 vlib_increment_combined_counter
1911 (&adjacency_counters,
1912 thread_index, adj_index1, 1,
1913 vlib_buffer_length_in_chain (vm, p1) + rw_len1);
1916 /* Check MTU of outgoing interface. */
1918 (vlib_buffer_length_in_chain (vm, p0) >
1920 rewrite_header.max_l3_packet_bytes ? IP6_ERROR_MTU_EXCEEDED :
1923 (vlib_buffer_length_in_chain (vm, p1) >
1925 rewrite_header.max_l3_packet_bytes ? IP6_ERROR_MTU_EXCEEDED :
1928 /* Don't adjust the buffer for hop count issue; icmp-error node
1929 * wants to see the IP headerr */
1930 if (PREDICT_TRUE (error0 == IP6_ERROR_NONE))
1932 p0->current_data -= rw_len0;
1933 p0->current_length += rw_len0;
1935 tx_sw_if_index0 = adj0[0].rewrite_header.sw_if_index;
1936 vnet_buffer (p0)->sw_if_index[VLIB_TX] = tx_sw_if_index0;
1937 next0 = adj0[0].rewrite_header.next_index;
1940 (adj0[0].rewrite_header.flags & VNET_REWRITE_HAS_FEATURES))
1941 vnet_feature_arc_start (lm->output_feature_arc_index,
1942 tx_sw_if_index0, &next0, p0);
1944 if (PREDICT_TRUE (error1 == IP6_ERROR_NONE))
1946 p1->current_data -= rw_len1;
1947 p1->current_length += rw_len1;
1949 tx_sw_if_index1 = adj1[0].rewrite_header.sw_if_index;
1950 vnet_buffer (p1)->sw_if_index[VLIB_TX] = tx_sw_if_index1;
1951 next1 = adj1[0].rewrite_header.next_index;
1954 (adj1[0].rewrite_header.flags & VNET_REWRITE_HAS_FEATURES))
1955 vnet_feature_arc_start (lm->output_feature_arc_index,
1956 tx_sw_if_index1, &next1, p1);
1959 /* Guess we are only writing on simple Ethernet header. */
1960 vnet_rewrite_two_headers (adj0[0], adj1[0],
1961 ip0, ip1, sizeof (ethernet_header_t));
1965 adj0->sub_type.midchain.fixup_func
1966 (vm, adj0, p0, adj0->sub_type.midchain.fixup_data);
1967 adj1->sub_type.midchain.fixup_func
1968 (vm, adj1, p1, adj1->sub_type.midchain.fixup_data);
1973 * copy bytes from the IP address into the MAC rewrite
1975 vnet_fixup_one_header (adj0[0], &ip0->dst_address, ip0);
1976 vnet_fixup_one_header (adj1[0], &ip1->dst_address, ip1);
1979 vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
1980 to_next, n_left_to_next,
1981 pi0, pi1, next0, next1);
1984 while (n_left_from > 0 && n_left_to_next > 0)
1986 ip_adjacency_t *adj0;
1990 u32 adj_index0, next0, error0;
1991 u32 tx_sw_if_index0;
1993 pi0 = to_next[0] = from[0];
1995 p0 = vlib_get_buffer (vm, pi0);
1997 adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
1999 adj0 = adj_get (adj_index0);
2001 ip0 = vlib_buffer_get_current (p0);
2003 error0 = IP6_ERROR_NONE;
2004 next0 = IP6_REWRITE_NEXT_DROP;
2006 /* Check hop limit */
2007 if (PREDICT_TRUE (!(p0->flags & VNET_BUFFER_F_LOCALLY_ORIGINATED)))
2009 i32 hop_limit0 = ip0->hop_limit;
2011 ASSERT (ip0->hop_limit > 0);
2015 ip0->hop_limit = hop_limit0;
2017 if (PREDICT_FALSE (hop_limit0 <= 0))
2020 * If the hop count drops below 1 when forwarding, generate
2023 error0 = IP6_ERROR_TIME_EXPIRED;
2024 next0 = IP6_REWRITE_NEXT_ICMP_ERROR;
2025 vnet_buffer (p0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
2026 icmp6_error_set_vnet_buffer (p0, ICMP6_time_exceeded,
2027 ICMP6_time_exceeded_ttl_exceeded_in_transit,
2033 p0->flags &= ~VNET_BUFFER_F_LOCALLY_ORIGINATED;
2036 /* Guess we are only writing on simple Ethernet header. */
2037 vnet_rewrite_one_header (adj0[0], ip0, sizeof (ethernet_header_t));
2039 /* Update packet buffer attributes/set output interface. */
2040 rw_len0 = adj0[0].rewrite_header.data_bytes;
2041 vnet_buffer (p0)->ip.save_rewrite_length = rw_len0;
2045 vlib_increment_combined_counter
2046 (&adjacency_counters,
2047 thread_index, adj_index0, 1,
2048 vlib_buffer_length_in_chain (vm, p0) + rw_len0);
2051 /* Check MTU of outgoing interface. */
2053 (vlib_buffer_length_in_chain (vm, p0) >
2055 rewrite_header.max_l3_packet_bytes ? IP6_ERROR_MTU_EXCEEDED :
2058 /* Don't adjust the buffer for hop count issue; icmp-error node
2059 * wants to see the IP headerr */
2060 if (PREDICT_TRUE (error0 == IP6_ERROR_NONE))
2062 p0->current_data -= rw_len0;
2063 p0->current_length += rw_len0;
2065 tx_sw_if_index0 = adj0[0].rewrite_header.sw_if_index;
2067 vnet_buffer (p0)->sw_if_index[VLIB_TX] = tx_sw_if_index0;
2068 next0 = adj0[0].rewrite_header.next_index;
2071 (adj0[0].rewrite_header.flags & VNET_REWRITE_HAS_FEATURES))
2072 vnet_feature_arc_start (lm->output_feature_arc_index,
2073 tx_sw_if_index0, &next0, p0);
2078 adj0->sub_type.midchain.fixup_func
2079 (vm, adj0, p0, adj0->sub_type.midchain.fixup_data);
2083 vnet_fixup_one_header (adj0[0], &ip0->dst_address, ip0);
2086 p0->error = error_node->errors[error0];
2091 n_left_to_next -= 1;
2093 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
2094 to_next, n_left_to_next,
2098 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2101 /* Need to do trace after rewrites to pick up new packet data. */
2102 if (node->flags & VLIB_NODE_FLAG_TRACE)
2103 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
2105 return frame->n_vectors;
2109 ip6_rewrite (vlib_main_t * vm,
2110 vlib_node_runtime_t * node, vlib_frame_t * frame)
2112 if (adj_are_counters_enabled ())
2113 return ip6_rewrite_inline (vm, node, frame, 1, 0, 0);
2115 return ip6_rewrite_inline (vm, node, frame, 0, 0, 0);
2119 ip6_rewrite_mcast (vlib_main_t * vm,
2120 vlib_node_runtime_t * node, vlib_frame_t * frame)
2122 if (adj_are_counters_enabled ())
2123 return ip6_rewrite_inline (vm, node, frame, 1, 0, 1);
2125 return ip6_rewrite_inline (vm, node, frame, 0, 0, 1);
2129 ip6_midchain (vlib_main_t * vm,
2130 vlib_node_runtime_t * node, vlib_frame_t * frame)
2132 if (adj_are_counters_enabled ())
2133 return ip6_rewrite_inline (vm, node, frame, 1, 1, 0);
2135 return ip6_rewrite_inline (vm, node, frame, 0, 1, 0);
2139 ip6_mcast_midchain (vlib_main_t * vm,
2140 vlib_node_runtime_t * node, vlib_frame_t * frame)
2142 if (adj_are_counters_enabled ())
2143 return ip6_rewrite_inline (vm, node, frame, 1, 1, 1);
2145 return ip6_rewrite_inline (vm, node, frame, 0, 1, 1);
2149 VLIB_REGISTER_NODE (ip6_midchain_node) =
2151 .function = ip6_midchain,
2152 .name = "ip6-midchain",
2153 .vector_size = sizeof (u32),
2154 .format_trace = format_ip6_forward_next_trace,
2155 .sibling_of = "ip6-rewrite",
2159 VLIB_NODE_FUNCTION_MULTIARCH (ip6_midchain_node, ip6_midchain);
2162 VLIB_REGISTER_NODE (ip6_rewrite_node) =
2164 .function = ip6_rewrite,
2165 .name = "ip6-rewrite",
2166 .vector_size = sizeof (u32),
2167 .format_trace = format_ip6_rewrite_trace,
2171 [IP6_REWRITE_NEXT_DROP] = "ip6-drop",
2172 [IP6_REWRITE_NEXT_ICMP_ERROR] = "ip6-icmp-error",
2177 VLIB_NODE_FUNCTION_MULTIARCH (ip6_rewrite_node, ip6_rewrite);
2180 VLIB_REGISTER_NODE (ip6_rewrite_mcast_node) =
2182 .function = ip6_rewrite_mcast,
2183 .name = "ip6-rewrite-mcast",
2184 .vector_size = sizeof (u32),
2185 .format_trace = format_ip6_rewrite_trace,
2186 .sibling_of = "ip6-rewrite",
2190 VLIB_NODE_FUNCTION_MULTIARCH (ip6_rewrite_mcast_node, ip6_rewrite_mcast);
2193 VLIB_REGISTER_NODE (ip6_mcast_midchain_node, static) =
2195 .function = ip6_mcast_midchain,
2196 .name = "ip6-mcast-midchain",
2197 .vector_size = sizeof (u32),
2198 .format_trace = format_ip6_rewrite_trace,
2199 .sibling_of = "ip6-rewrite",
2203 VLIB_NODE_FUNCTION_MULTIARCH (ip6_mcast_midchain_node, ip6_mcast_midchain);
2206 * Hop-by-Hop handling
2208 ip6_hop_by_hop_main_t ip6_hop_by_hop_main;
2210 #define foreach_ip6_hop_by_hop_error \
2211 _(PROCESSED, "pkts with ip6 hop-by-hop options") \
2212 _(FORMAT, "incorrectly formatted hop-by-hop options") \
2213 _(UNKNOWN_OPTION, "unknown ip6 hop-by-hop options")
2218 #define _(sym,str) IP6_HOP_BY_HOP_ERROR_##sym,
2219 foreach_ip6_hop_by_hop_error
2221 IP6_HOP_BY_HOP_N_ERROR,
2222 } ip6_hop_by_hop_error_t;
2226 * Primary h-b-h handler trace support
2227 * We work pretty hard on the problem for obvious reasons
2233 u8 option_data[256];
2234 } ip6_hop_by_hop_trace_t;
2236 vlib_node_registration_t ip6_hop_by_hop_node;
2238 static char *ip6_hop_by_hop_error_strings[] = {
2239 #define _(sym,string) string,
2240 foreach_ip6_hop_by_hop_error
2245 format_ip6_hop_by_hop_ext_hdr (u8 * s, va_list * args)
2247 ip6_hop_by_hop_header_t *hbh0 = va_arg (*args, ip6_hop_by_hop_header_t *);
2248 int total_len = va_arg (*args, int);
2249 ip6_hop_by_hop_option_t *opt0, *limit0;
2250 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2253 s = format (s, "IP6_HOP_BY_HOP: next protocol %d len %d total %d",
2254 hbh0->protocol, (hbh0->length + 1) << 3, total_len);
2256 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2257 limit0 = (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 + total_len);
2259 while (opt0 < limit0)
2264 case 0: /* Pad, just stop */
2265 opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0 + 1);
2269 if (hm->trace[type0])
2271 s = (*hm->trace[type0]) (s, opt0);
2276 format (s, "\n unrecognized option %d length %d", type0,
2280 (ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length +
2281 sizeof (ip6_hop_by_hop_option_t));
2289 format_ip6_hop_by_hop_trace (u8 * s, va_list * args)
2291 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
2292 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
2293 ip6_hop_by_hop_trace_t *t = va_arg (*args, ip6_hop_by_hop_trace_t *);
2294 ip6_hop_by_hop_header_t *hbh0;
2295 ip6_hop_by_hop_option_t *opt0, *limit0;
2296 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2300 hbh0 = (ip6_hop_by_hop_header_t *) t->option_data;
2302 s = format (s, "IP6_HOP_BY_HOP: next index %d len %d traced %d",
2303 t->next_index, (hbh0->length + 1) << 3, t->trace_len);
2305 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2306 limit0 = (ip6_hop_by_hop_option_t *) ((u8 *) hbh0) + t->trace_len;
2308 while (opt0 < limit0)
2313 case 0: /* Pad, just stop */
2314 opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0) + 1;
2318 if (hm->trace[type0])
2320 s = (*hm->trace[type0]) (s, opt0);
2325 format (s, "\n unrecognized option %d length %d", type0,
2329 (ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length +
2330 sizeof (ip6_hop_by_hop_option_t));
2338 ip6_scan_hbh_options (vlib_buffer_t * b0,
2340 ip6_hop_by_hop_header_t * hbh0,
2341 ip6_hop_by_hop_option_t * opt0,
2342 ip6_hop_by_hop_option_t * limit0, u32 * next0)
2344 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2348 while (opt0 < limit0)
2354 opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0) + 1;
2359 if (hm->options[type0])
2361 if ((*hm->options[type0]) (b0, ip0, opt0) < 0)
2363 error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2369 /* Unrecognized mandatory option, check the two high order bits */
2370 switch (opt0->type & HBH_OPTION_TYPE_HIGH_ORDER_BITS)
2372 case HBH_OPTION_TYPE_SKIP_UNKNOWN:
2374 case HBH_OPTION_TYPE_DISCARD_UNKNOWN:
2375 error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2376 *next0 = IP_LOOKUP_NEXT_DROP;
2378 case HBH_OPTION_TYPE_DISCARD_UNKNOWN_ICMP:
2379 error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2380 *next0 = IP_LOOKUP_NEXT_ICMP_ERROR;
2381 icmp6_error_set_vnet_buffer (b0, ICMP6_parameter_problem,
2382 ICMP6_parameter_problem_unrecognized_option,
2383 (u8 *) opt0 - (u8 *) ip0);
2385 case HBH_OPTION_TYPE_DISCARD_UNKNOWN_ICMP_NOT_MCAST:
2386 error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2387 if (!ip6_address_is_multicast (&ip0->dst_address))
2389 *next0 = IP_LOOKUP_NEXT_ICMP_ERROR;
2390 icmp6_error_set_vnet_buffer (b0,
2391 ICMP6_parameter_problem,
2392 ICMP6_parameter_problem_unrecognized_option,
2393 (u8 *) opt0 - (u8 *) ip0);
2397 *next0 = IP_LOOKUP_NEXT_DROP;
2405 (ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length +
2406 sizeof (ip6_hop_by_hop_option_t));
2412 * Process the Hop-by-Hop Options header
2415 ip6_hop_by_hop (vlib_main_t * vm,
2416 vlib_node_runtime_t * node, vlib_frame_t * frame)
2418 vlib_node_runtime_t *error_node =
2419 vlib_node_get_runtime (vm, ip6_hop_by_hop_node.index);
2420 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2421 u32 n_left_from, *from, *to_next;
2422 ip_lookup_next_t next_index;
2424 from = vlib_frame_vector_args (frame);
2425 n_left_from = frame->n_vectors;
2426 next_index = node->cached_next_index;
2428 while (n_left_from > 0)
2432 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
2434 while (n_left_from >= 4 && n_left_to_next >= 2)
2437 vlib_buffer_t *b0, *b1;
2439 ip6_header_t *ip0, *ip1;
2440 ip6_hop_by_hop_header_t *hbh0, *hbh1;
2441 ip6_hop_by_hop_option_t *opt0, *limit0, *opt1, *limit1;
2442 u8 error0 = 0, error1 = 0;
2444 /* Prefetch next iteration. */
2446 vlib_buffer_t *p2, *p3;
2448 p2 = vlib_get_buffer (vm, from[2]);
2449 p3 = vlib_get_buffer (vm, from[3]);
2451 vlib_prefetch_buffer_header (p2, LOAD);
2452 vlib_prefetch_buffer_header (p3, LOAD);
2454 CLIB_PREFETCH (p2->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
2455 CLIB_PREFETCH (p3->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
2458 /* Speculatively enqueue b0, b1 to the current next frame */
2459 to_next[0] = bi0 = from[0];
2460 to_next[1] = bi1 = from[1];
2464 n_left_to_next -= 2;
2466 b0 = vlib_get_buffer (vm, bi0);
2467 b1 = vlib_get_buffer (vm, bi1);
2469 /* Default use the next_index from the adjacency. A HBH option rarely redirects to a different node */
2470 u32 adj_index0 = vnet_buffer (b0)->ip.adj_index[VLIB_TX];
2471 ip_adjacency_t *adj0 = adj_get (adj_index0);
2472 u32 adj_index1 = vnet_buffer (b1)->ip.adj_index[VLIB_TX];
2473 ip_adjacency_t *adj1 = adj_get (adj_index1);
2475 /* Default use the next_index from the adjacency. A HBH option rarely redirects to a different node */
2476 next0 = adj0->lookup_next_index;
2477 next1 = adj1->lookup_next_index;
2479 ip0 = vlib_buffer_get_current (b0);
2480 ip1 = vlib_buffer_get_current (b1);
2481 hbh0 = (ip6_hop_by_hop_header_t *) (ip0 + 1);
2482 hbh1 = (ip6_hop_by_hop_header_t *) (ip1 + 1);
2483 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2484 opt1 = (ip6_hop_by_hop_option_t *) (hbh1 + 1);
2486 (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 +
2487 ((hbh0->length + 1) << 3));
2489 (ip6_hop_by_hop_option_t *) ((u8 *) hbh1 +
2490 ((hbh1->length + 1) << 3));
2493 * Basic validity checks
2495 if ((hbh0->length + 1) << 3 >
2496 clib_net_to_host_u16 (ip0->payload_length))
2498 error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2499 next0 = IP_LOOKUP_NEXT_DROP;
2502 /* Scan the set of h-b-h options, process ones that we understand */
2503 error0 = ip6_scan_hbh_options (b0, ip0, hbh0, opt0, limit0, &next0);
2505 if ((hbh1->length + 1) << 3 >
2506 clib_net_to_host_u16 (ip1->payload_length))
2508 error1 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2509 next1 = IP_LOOKUP_NEXT_DROP;
2512 /* Scan the set of h-b-h options, process ones that we understand */
2513 error1 = ip6_scan_hbh_options (b1, ip1, hbh1, opt1, limit1, &next1);
2516 /* Has the classifier flagged this buffer for special treatment? */
2519 && (vnet_buffer (b0)->l2_classify.opaque_index & OI_DECAP)))
2520 next0 = hm->next_override;
2522 /* Has the classifier flagged this buffer for special treatment? */
2525 && (vnet_buffer (b1)->l2_classify.opaque_index & OI_DECAP)))
2526 next1 = hm->next_override;
2528 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)))
2530 if (b0->flags & VLIB_BUFFER_IS_TRACED)
2532 ip6_hop_by_hop_trace_t *t =
2533 vlib_add_trace (vm, node, b0, sizeof (*t));
2534 u32 trace_len = (hbh0->length + 1) << 3;
2535 t->next_index = next0;
2536 /* Capture the h-b-h option verbatim */
2539 ARRAY_LEN (t->option_data) ? trace_len :
2540 ARRAY_LEN (t->option_data);
2541 t->trace_len = trace_len;
2542 clib_memcpy (t->option_data, hbh0, trace_len);
2544 if (b1->flags & VLIB_BUFFER_IS_TRACED)
2546 ip6_hop_by_hop_trace_t *t =
2547 vlib_add_trace (vm, node, b1, sizeof (*t));
2548 u32 trace_len = (hbh1->length + 1) << 3;
2549 t->next_index = next1;
2550 /* Capture the h-b-h option verbatim */
2553 ARRAY_LEN (t->option_data) ? trace_len :
2554 ARRAY_LEN (t->option_data);
2555 t->trace_len = trace_len;
2556 clib_memcpy (t->option_data, hbh1, trace_len);
2561 b0->error = error_node->errors[error0];
2562 b1->error = error_node->errors[error1];
2564 /* verify speculative enqueue, maybe switch current next frame */
2565 vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
2566 n_left_to_next, bi0, bi1, next0,
2570 while (n_left_from > 0 && n_left_to_next > 0)
2576 ip6_hop_by_hop_header_t *hbh0;
2577 ip6_hop_by_hop_option_t *opt0, *limit0;
2580 /* Speculatively enqueue b0 to the current next frame */
2586 n_left_to_next -= 1;
2588 b0 = vlib_get_buffer (vm, bi0);
2590 * Default use the next_index from the adjacency.
2591 * A HBH option rarely redirects to a different node
2593 u32 adj_index0 = vnet_buffer (b0)->ip.adj_index[VLIB_TX];
2594 ip_adjacency_t *adj0 = adj_get (adj_index0);
2595 next0 = adj0->lookup_next_index;
2597 ip0 = vlib_buffer_get_current (b0);
2598 hbh0 = (ip6_hop_by_hop_header_t *) (ip0 + 1);
2599 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2601 (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 +
2602 ((hbh0->length + 1) << 3));
2605 * Basic validity checks
2607 if ((hbh0->length + 1) << 3 >
2608 clib_net_to_host_u16 (ip0->payload_length))
2610 error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2611 next0 = IP_LOOKUP_NEXT_DROP;
2615 /* Scan the set of h-b-h options, process ones that we understand */
2616 error0 = ip6_scan_hbh_options (b0, ip0, hbh0, opt0, limit0, &next0);
2619 /* Has the classifier flagged this buffer for special treatment? */
2622 && (vnet_buffer (b0)->l2_classify.opaque_index & OI_DECAP)))
2623 next0 = hm->next_override;
2625 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
2627 ip6_hop_by_hop_trace_t *t =
2628 vlib_add_trace (vm, node, b0, sizeof (*t));
2629 u32 trace_len = (hbh0->length + 1) << 3;
2630 t->next_index = next0;
2631 /* Capture the h-b-h option verbatim */
2634 ARRAY_LEN (t->option_data) ? trace_len :
2635 ARRAY_LEN (t->option_data);
2636 t->trace_len = trace_len;
2637 clib_memcpy (t->option_data, hbh0, trace_len);
2640 b0->error = error_node->errors[error0];
2642 /* verify speculative enqueue, maybe switch current next frame */
2643 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
2644 n_left_to_next, bi0, next0);
2646 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2648 return frame->n_vectors;
2652 VLIB_REGISTER_NODE (ip6_hop_by_hop_node) =
2654 .function = ip6_hop_by_hop,
2655 .name = "ip6-hop-by-hop",
2656 .sibling_of = "ip6-lookup",
2657 .vector_size = sizeof (u32),
2658 .format_trace = format_ip6_hop_by_hop_trace,
2659 .type = VLIB_NODE_TYPE_INTERNAL,
2660 .n_errors = ARRAY_LEN (ip6_hop_by_hop_error_strings),
2661 .error_strings = ip6_hop_by_hop_error_strings,
2666 VLIB_NODE_FUNCTION_MULTIARCH (ip6_hop_by_hop_node, ip6_hop_by_hop);
2668 static clib_error_t *
2669 ip6_hop_by_hop_init (vlib_main_t * vm)
2671 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2672 memset (hm->options, 0, sizeof (hm->options));
2673 memset (hm->trace, 0, sizeof (hm->trace));
2674 hm->next_override = IP6_LOOKUP_NEXT_POP_HOP_BY_HOP;
2678 VLIB_INIT_FUNCTION (ip6_hop_by_hop_init);
2681 ip6_hbh_set_next_override (uword next)
2683 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2685 hm->next_override = next;
2689 ip6_hbh_register_option (u8 option,
2690 int options (vlib_buffer_t * b, ip6_header_t * ip,
2691 ip6_hop_by_hop_option_t * opt),
2692 u8 * trace (u8 * s, ip6_hop_by_hop_option_t * opt))
2694 ip6_main_t *im = &ip6_main;
2695 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2697 ASSERT (option < ARRAY_LEN (hm->options));
2699 /* Already registered */
2700 if (hm->options[option])
2703 hm->options[option] = options;
2704 hm->trace[option] = trace;
2706 /* Set global variable */
2707 im->hbh_enabled = 1;
2713 ip6_hbh_unregister_option (u8 option)
2715 ip6_main_t *im = &ip6_main;
2716 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2718 ASSERT (option < ARRAY_LEN (hm->options));
2720 /* Not registered */
2721 if (!hm->options[option])
2724 hm->options[option] = NULL;
2725 hm->trace[option] = NULL;
2727 /* Disable global knob if this was the last option configured */
2730 for (i = 0; i < 256; i++)
2732 if (hm->options[option])
2739 im->hbh_enabled = 0;
2744 /* Global IP6 main. */
2745 ip6_main_t ip6_main;
2747 static clib_error_t *
2748 ip6_lookup_init (vlib_main_t * vm)
2750 ip6_main_t *im = &ip6_main;
2751 clib_error_t *error;
2754 if ((error = vlib_call_init_function (vm, vnet_feature_init)))
2757 for (i = 0; i < ARRAY_LEN (im->fib_masks); i++)
2764 for (j = 0; j < i0; j++)
2765 im->fib_masks[i].as_u32[j] = ~0;
2768 im->fib_masks[i].as_u32[i0] =
2769 clib_host_to_net_u32 (pow2_mask (i1) << (32 - i1));
2772 ip_lookup_init (&im->lookup_main, /* is_ip6 */ 1);
2774 if (im->lookup_table_nbuckets == 0)
2775 im->lookup_table_nbuckets = IP6_FIB_DEFAULT_HASH_NUM_BUCKETS;
2777 im->lookup_table_nbuckets = 1 << max_log2 (im->lookup_table_nbuckets);
2779 if (im->lookup_table_size == 0)
2780 im->lookup_table_size = IP6_FIB_DEFAULT_HASH_MEMORY_SIZE;
2782 BV (clib_bihash_init) (&(im->ip6_table[IP6_FIB_TABLE_FWDING].ip6_hash),
2783 "ip6 FIB fwding table",
2784 im->lookup_table_nbuckets, im->lookup_table_size);
2785 BV (clib_bihash_init) (&im->ip6_table[IP6_FIB_TABLE_NON_FWDING].ip6_hash,
2786 "ip6 FIB non-fwding table",
2787 im->lookup_table_nbuckets, im->lookup_table_size);
2789 /* Create FIB with index 0 and table id of 0. */
2790 fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6, 0,
2791 FIB_SOURCE_DEFAULT_ROUTE);
2792 mfib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6, 0,
2793 MFIB_SOURCE_DEFAULT_ROUTE);
2797 pn = pg_get_node (ip6_lookup_node.index);
2798 pn->unformat_edit = unformat_pg_ip6_header;
2801 /* Unless explicitly configured, don't process HBH options */
2802 im->hbh_enabled = 0;
2805 icmp6_neighbor_solicitation_header_t p;
2807 memset (&p, 0, sizeof (p));
2809 p.ip.ip_version_traffic_class_and_flow_label =
2810 clib_host_to_net_u32 (0x6 << 28);
2811 p.ip.payload_length =
2812 clib_host_to_net_u16 (sizeof (p) -
2814 (icmp6_neighbor_solicitation_header_t, neighbor));
2815 p.ip.protocol = IP_PROTOCOL_ICMP6;
2816 p.ip.hop_limit = 255;
2817 ip6_set_solicited_node_multicast_address (&p.ip.dst_address, 0);
2819 p.neighbor.icmp.type = ICMP6_neighbor_solicitation;
2821 p.link_layer_option.header.type =
2822 ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address;
2823 p.link_layer_option.header.n_data_u64s =
2824 sizeof (p.link_layer_option) / sizeof (u64);
2826 vlib_packet_template_init (vm,
2827 &im->discover_neighbor_packet_template,
2829 /* alloc chunk size */ 8,
2830 "ip6 neighbor discovery");
2836 VLIB_INIT_FUNCTION (ip6_lookup_init);
2839 ip6_link_local_address_from_ethernet_mac_address (ip6_address_t * ip,
2842 ip->as_u64[0] = clib_host_to_net_u64 (0xFE80000000000000ULL);
2843 /* Invert the "u" bit */
2844 ip->as_u8[8] = mac[0] ^ (1 << 1);
2845 ip->as_u8[9] = mac[1];
2846 ip->as_u8[10] = mac[2];
2847 ip->as_u8[11] = 0xFF;
2848 ip->as_u8[12] = 0xFE;
2849 ip->as_u8[13] = mac[3];
2850 ip->as_u8[14] = mac[4];
2851 ip->as_u8[15] = mac[5];
2855 ip6_ethernet_mac_address_from_link_local_address (u8 * mac,
2858 /* Invert the previously inverted "u" bit */
2859 mac[0] = ip->as_u8[8] ^ (1 << 1);
2860 mac[1] = ip->as_u8[9];
2861 mac[2] = ip->as_u8[10];
2862 mac[3] = ip->as_u8[13];
2863 mac[4] = ip->as_u8[14];
2864 mac[5] = ip->as_u8[15];
2867 static clib_error_t *
2868 test_ip6_link_command_fn (vlib_main_t * vm,
2869 unformat_input_t * input, vlib_cli_command_t * cmd)
2872 ip6_address_t _a, *a = &_a;
2874 if (unformat (input, "%U", unformat_ethernet_address, mac))
2876 ip6_link_local_address_from_ethernet_mac_address (a, mac);
2877 vlib_cli_output (vm, "Link local address: %U", format_ip6_address, a);
2878 ip6_ethernet_mac_address_from_link_local_address (mac, a);
2879 vlib_cli_output (vm, "Original MAC address: %U",
2880 format_ethernet_address, mac);
2887 * This command converts the given MAC Address into an IPv6 link-local
2891 * Example of how to create an IPv6 link-local address:
2892 * @cliexstart{test ip6 link 16:d9:e0:91:79:86}
2893 * Link local address: fe80::14d9:e0ff:fe91:7986
2894 * Original MAC address: 16:d9:e0:91:79:86
2898 VLIB_CLI_COMMAND (test_link_command, static) =
2900 .path = "test ip6 link",
2901 .function = test_ip6_link_command_fn,
2902 .short_help = "test ip6 link <mac-address>",
2907 vnet_set_ip6_flow_hash (u32 table_id, u32 flow_hash_config)
2911 fib_index = fib_table_find (FIB_PROTOCOL_IP6, table_id);
2913 if (~0 == fib_index)
2914 return VNET_API_ERROR_NO_SUCH_FIB;
2916 fib_table_set_flow_hash_config (fib_index, FIB_PROTOCOL_IP6,
2922 static clib_error_t *
2923 set_ip6_flow_hash_command_fn (vlib_main_t * vm,
2924 unformat_input_t * input,
2925 vlib_cli_command_t * cmd)
2929 u32 flow_hash_config = 0;
2932 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
2934 if (unformat (input, "table %d", &table_id))
2937 else if (unformat (input, #a)) { flow_hash_config |= v; matched=1;}
2938 foreach_flow_hash_bit
2945 return clib_error_return (0, "unknown input `%U'",
2946 format_unformat_error, input);
2948 rv = vnet_set_ip6_flow_hash (table_id, flow_hash_config);
2955 return clib_error_return (0, "no such FIB table %d", table_id);
2958 clib_warning ("BUG: illegal flow hash config 0x%x", flow_hash_config);
2966 * Configure the set of IPv6 fields used by the flow hash.
2970 * Example of how to set the flow hash on a given table:
2971 * @cliexcmd{set ip6 flow-hash table 8 dst sport dport proto}
2973 * Example of display the configured flow hash:
2974 * @cliexstart{show ip6 fib}
2975 * ipv6-VRF:0, fib_index 0, flow hash: src dst sport dport proto
2978 * [@0]: dpo-load-balance: [index:5 buckets:1 uRPF:5 to:[0:0]]
2979 * [0] [@0]: dpo-drop ip6
2982 * [@0]: dpo-load-balance: [index:10 buckets:1 uRPF:10 to:[0:0]]
2983 * [0] [@2]: dpo-receive
2986 * [@0]: dpo-load-balance: [index:8 buckets:1 uRPF:8 to:[0:0]]
2987 * [0] [@2]: dpo-receive
2990 * [@0]: dpo-load-balance: [index:7 buckets:1 uRPF:7 to:[0:0]]
2991 * [0] [@2]: dpo-receive
2994 * [@0]: dpo-load-balance: [index:9 buckets:1 uRPF:9 to:[0:0]]
2995 * [0] [@2]: dpo-receive
2996 * ff02::1:ff00:0/104
2998 * [@0]: dpo-load-balance: [index:6 buckets:1 uRPF:6 to:[0:0]]
2999 * [0] [@2]: dpo-receive
3000 * ipv6-VRF:8, fib_index 1, flow hash: dst sport dport proto
3003 * [@0]: dpo-load-balance: [index:21 buckets:1 uRPF:20 to:[0:0]]
3004 * [0] [@0]: dpo-drop ip6
3007 * [@0]: dpo-load-balance: [index:27 buckets:1 uRPF:26 to:[0:0]]
3008 * [0] [@4]: ipv6-glean: af_packet0
3011 * [@0]: dpo-load-balance: [index:28 buckets:1 uRPF:27 to:[0:0]]
3012 * [0] [@2]: dpo-receive: @::a:1:1:0:7 on af_packet0
3015 * [@0]: dpo-load-balance: [index:26 buckets:1 uRPF:25 to:[0:0]]
3016 * [0] [@2]: dpo-receive
3017 * fe80::fe:3eff:fe3e:9222/128
3019 * [@0]: dpo-load-balance: [index:29 buckets:1 uRPF:28 to:[0:0]]
3020 * [0] [@2]: dpo-receive: fe80::fe:3eff:fe3e:9222 on af_packet0
3023 * [@0]: dpo-load-balance: [index:24 buckets:1 uRPF:23 to:[0:0]]
3024 * [0] [@2]: dpo-receive
3027 * [@0]: dpo-load-balance: [index:23 buckets:1 uRPF:22 to:[0:0]]
3028 * [0] [@2]: dpo-receive
3031 * [@0]: dpo-load-balance: [index:25 buckets:1 uRPF:24 to:[0:0]]
3032 * [0] [@2]: dpo-receive
3033 * ff02::1:ff00:0/104
3035 * [@0]: dpo-load-balance: [index:22 buckets:1 uRPF:21 to:[0:0]]
3036 * [0] [@2]: dpo-receive
3041 VLIB_CLI_COMMAND (set_ip6_flow_hash_command, static) =
3043 .path = "set ip6 flow-hash",
3045 "set ip6 flow-hash table <table-id> [src] [dst] [sport] [dport] [proto] [reverse]",
3046 .function = set_ip6_flow_hash_command_fn,
3050 static clib_error_t *
3051 show_ip6_local_command_fn (vlib_main_t * vm,
3052 unformat_input_t * input, vlib_cli_command_t * cmd)
3054 ip6_main_t *im = &ip6_main;
3055 ip_lookup_main_t *lm = &im->lookup_main;
3058 vlib_cli_output (vm, "Protocols handled by ip6_local");
3059 for (i = 0; i < ARRAY_LEN (lm->local_next_by_ip_protocol); i++)
3061 if (lm->local_next_by_ip_protocol[i] != IP_LOCAL_NEXT_PUNT)
3064 u32 node_index = vlib_get_node (vm,
3065 ip6_local_node.index)->
3066 next_nodes[lm->local_next_by_ip_protocol[i]];
3067 vlib_cli_output (vm, "%d: %U", i, format_vlib_node_name, vm,
3077 * Display the set of protocols handled by the local IPv6 stack.
3080 * Example of how to display local protocol table:
3081 * @cliexstart{show ip6 local}
3082 * Protocols handled by ip6_local
3090 VLIB_CLI_COMMAND (show_ip6_local, static) =
3092 .path = "show ip6 local",
3093 .function = show_ip6_local_command_fn,
3094 .short_help = "show ip6 local",
3099 vnet_set_ip6_classify_intfc (vlib_main_t * vm, u32 sw_if_index,
3102 vnet_main_t *vnm = vnet_get_main ();
3103 vnet_interface_main_t *im = &vnm->interface_main;
3104 ip6_main_t *ipm = &ip6_main;
3105 ip_lookup_main_t *lm = &ipm->lookup_main;
3106 vnet_classify_main_t *cm = &vnet_classify_main;
3107 ip6_address_t *if_addr;
3109 if (pool_is_free_index (im->sw_interfaces, sw_if_index))
3110 return VNET_API_ERROR_NO_MATCHING_INTERFACE;
3112 if (table_index != ~0 && pool_is_free_index (cm->tables, table_index))
3113 return VNET_API_ERROR_NO_SUCH_ENTRY;
3115 vec_validate (lm->classify_table_index_by_sw_if_index, sw_if_index);
3116 lm->classify_table_index_by_sw_if_index[sw_if_index] = table_index;
3118 if_addr = ip6_interface_first_address (ipm, sw_if_index);
3120 if (NULL != if_addr)
3122 fib_prefix_t pfx = {
3124 .fp_proto = FIB_PROTOCOL_IP6,
3125 .fp_addr.ip6 = *if_addr,
3129 fib_index = fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4,
3133 if (table_index != (u32) ~ 0)
3135 dpo_id_t dpo = DPO_INVALID;
3140 classify_dpo_create (DPO_PROTO_IP6, table_index));
3142 fib_table_entry_special_dpo_add (fib_index,
3144 FIB_SOURCE_CLASSIFY,
3145 FIB_ENTRY_FLAG_NONE, &dpo);
3150 fib_table_entry_special_remove (fib_index,
3151 &pfx, FIB_SOURCE_CLASSIFY);
3158 static clib_error_t *
3159 set_ip6_classify_command_fn (vlib_main_t * vm,
3160 unformat_input_t * input,
3161 vlib_cli_command_t * cmd)
3163 u32 table_index = ~0;
3164 int table_index_set = 0;
3165 u32 sw_if_index = ~0;
3168 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
3170 if (unformat (input, "table-index %d", &table_index))
3171 table_index_set = 1;
3172 else if (unformat (input, "intfc %U", unformat_vnet_sw_interface,
3173 vnet_get_main (), &sw_if_index))
3179 if (table_index_set == 0)
3180 return clib_error_return (0, "classify table-index must be specified");
3182 if (sw_if_index == ~0)
3183 return clib_error_return (0, "interface / subif must be specified");
3185 rv = vnet_set_ip6_classify_intfc (vm, sw_if_index, table_index);
3192 case VNET_API_ERROR_NO_MATCHING_INTERFACE:
3193 return clib_error_return (0, "No such interface");
3195 case VNET_API_ERROR_NO_SUCH_ENTRY:
3196 return clib_error_return (0, "No such classifier table");
3202 * Assign a classification table to an interface. The classification
3203 * table is created using the '<em>classify table</em>' and '<em>classify session</em>'
3204 * commands. Once the table is create, use this command to filter packets
3208 * Example of how to assign a classification table to an interface:
3209 * @cliexcmd{set ip6 classify intfc GigabitEthernet2/0/0 table-index 1}
3212 VLIB_CLI_COMMAND (set_ip6_classify_command, static) =
3214 .path = "set ip6 classify",
3216 "set ip6 classify intfc <interface> table-index <classify-idx>",
3217 .function = set_ip6_classify_command_fn,
3221 static clib_error_t *
3222 ip6_config (vlib_main_t * vm, unformat_input_t * input)
3224 ip6_main_t *im = &ip6_main;
3229 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
3231 if (unformat (input, "hash-buckets %d", &tmp))
3233 else if (unformat (input, "heap-size %U",
3234 unformat_memory_size, &heapsize))
3237 return clib_error_return (0, "unknown input '%U'",
3238 format_unformat_error, input);
3241 im->lookup_table_nbuckets = nbuckets;
3242 im->lookup_table_size = heapsize;
3247 VLIB_EARLY_CONFIG_FUNCTION (ip6_config, "ip6");
3250 * fd.io coding-style-patch-verification: ON
3253 * eval: (c-set-style "gnu")