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/ip_frag.h>
43 #include <vnet/ip/ip6_neighbor.h>
44 #include <vnet/ethernet/ethernet.h> /* for ethernet_header_t */
45 #include <vnet/srp/srp.h> /* for srp_hw_interface_class */
46 #include <vppinfra/cache.h>
47 #include <vnet/fib/fib_urpf_list.h> /* for FIB uRPF check */
48 #include <vnet/fib/ip6_fib.h>
49 #include <vnet/mfib/ip6_mfib.h>
50 #include <vnet/dpo/load_balance_map.h>
51 #include <vnet/dpo/classify_dpo.h>
53 #ifndef CLIB_MARCH_VARIANT
54 #include <vppinfra/bihash_template.c>
56 #include <vnet/ip/ip6_forward.h>
57 #include <vnet/interface_output.h>
59 /* Flag used by IOAM code. Classifier sets it pop-hop-by-hop checks it */
60 #define OI_DECAP 0x80000000
63 ip6_add_interface_prefix_routes (ip6_main_t * im,
66 ip6_address_t * address, u32 address_length)
68 ip_lookup_main_t *lm = &im->lookup_main;
69 ip_interface_prefix_t *if_prefix;
72 ip_interface_prefix_key_t key = {
74 .fp_len = address_length,
75 .fp_proto = FIB_PROTOCOL_IP6,
78 address->as_u64[0] & im->fib_masks[address_length].as_u64[0],
79 address->as_u64[1] & im->fib_masks[address_length].as_u64[1],
83 .sw_if_index = sw_if_index,
87 /* If prefix already set on interface, just increment ref count & return */
88 if_prefix = ip_get_interface_prefix (lm, &key);
91 if_prefix->ref_count += 1;
95 /* New prefix - allocate a pool entry, initialize it, add to the hash */
96 pool_get (lm->if_prefix_pool, if_prefix);
97 if_prefix->ref_count = 1;
98 clib_memcpy (&if_prefix->key, &key, sizeof (key));
99 mhash_set (&lm->prefix_to_if_prefix_index, &key,
100 if_prefix - lm->if_prefix_pool, 0 /* old value */ );
102 /* length < 128 - add glean */
103 if (address_length < 128)
105 /* set the glean route for the prefix */
106 fib_table_entry_update_one_path (fib_index, &key.prefix,
107 FIB_SOURCE_INTERFACE,
108 (FIB_ENTRY_FLAG_CONNECTED |
109 FIB_ENTRY_FLAG_ATTACHED),
111 /* No next-hop address */
113 /* invalid FIB index */
115 /* no out-label stack */
116 NULL, FIB_ROUTE_PATH_FLAG_NONE);
121 ip6_add_interface_routes (vnet_main_t * vnm, u32 sw_if_index,
122 ip6_main_t * im, u32 fib_index,
123 ip_interface_address_t * a)
125 ip_lookup_main_t *lm = &im->lookup_main;
126 ip6_address_t *address = ip_interface_address_get_address (lm, a);
128 .fp_len = a->address_length,
129 .fp_proto = FIB_PROTOCOL_IP6,
130 .fp_addr.ip6 = *address,
133 /* set special routes for the prefix if needed */
134 ip6_add_interface_prefix_routes (im, sw_if_index, fib_index,
135 address, a->address_length);
138 if (sw_if_index < vec_len (lm->classify_table_index_by_sw_if_index))
140 u32 classify_table_index =
141 lm->classify_table_index_by_sw_if_index[sw_if_index];
142 if (classify_table_index != (u32) ~ 0)
144 dpo_id_t dpo = DPO_INVALID;
149 classify_dpo_create (DPO_PROTO_IP6, classify_table_index));
151 fib_table_entry_special_dpo_add (fib_index,
154 FIB_ENTRY_FLAG_NONE, &dpo);
159 fib_table_entry_update_one_path (fib_index, &pfx,
160 FIB_SOURCE_INTERFACE,
161 (FIB_ENTRY_FLAG_CONNECTED |
162 FIB_ENTRY_FLAG_LOCAL),
166 1, NULL, FIB_ROUTE_PATH_FLAG_NONE);
170 ip6_del_interface_prefix_routes (ip6_main_t * im,
173 ip6_address_t * address, u32 address_length)
175 ip_lookup_main_t *lm = &im->lookup_main;
176 ip_interface_prefix_t *if_prefix;
179 ip_interface_prefix_key_t key = {
181 .fp_len = address_length,
182 .fp_proto = FIB_PROTOCOL_IP6,
185 address->as_u64[0] & im->fib_masks[address_length].as_u64[0],
186 address->as_u64[1] & im->fib_masks[address_length].as_u64[1],
190 .sw_if_index = sw_if_index,
194 if_prefix = ip_get_interface_prefix (lm, &key);
197 clib_warning ("Prefix not found while deleting %U",
198 format_ip4_address_and_length, address, address_length);
202 /* If not deleting last intf addr in prefix, decrement ref count & return */
203 if_prefix->ref_count -= 1;
204 if (if_prefix->ref_count > 0)
207 /* length <= 128, delete glean route */
208 if (address_length <= 128)
210 /* remove glean route for prefix */
211 fib_table_entry_delete (fib_index, &key.prefix, FIB_SOURCE_INTERFACE);
214 mhash_unset (&lm->prefix_to_if_prefix_index, &key, 0 /* old_value */ );
215 pool_put (lm->if_prefix_pool, if_prefix);
219 ip6_del_interface_routes (u32 sw_if_index, ip6_main_t * im,
221 ip6_address_t * address, u32 address_length)
225 .fp_proto = FIB_PROTOCOL_IP6,
226 .fp_addr.ip6 = *address,
229 /* delete special routes for the prefix if needed */
230 ip6_del_interface_prefix_routes (im, sw_if_index, fib_index,
231 address, address_length);
233 fib_table_entry_delete (fib_index, &pfx, FIB_SOURCE_INTERFACE);
236 #ifndef CLIB_MARCH_VARIANT
238 ip6_sw_interface_enable_disable (u32 sw_if_index, u32 is_enable)
240 ip6_main_t *im = &ip6_main;
242 vec_validate_init_empty (im->ip_enabled_by_sw_if_index, sw_if_index, 0);
245 * enable/disable only on the 1<->0 transition
249 if (1 != ++im->ip_enabled_by_sw_if_index[sw_if_index])
254 /* The ref count is 0 when an address is removed from an interface that has
255 * no address - this is not a ciritical error */
256 if (0 == im->ip_enabled_by_sw_if_index[sw_if_index] ||
257 0 != --im->ip_enabled_by_sw_if_index[sw_if_index])
261 vnet_feature_enable_disable ("ip6-unicast", "ip6-not-enabled", sw_if_index,
264 vnet_feature_enable_disable ("ip6-multicast", "ip6-not-enabled",
265 sw_if_index, !is_enable, 0, 0);
268 /* get first interface address */
270 ip6_interface_first_address (ip6_main_t * im, u32 sw_if_index)
272 ip_lookup_main_t *lm = &im->lookup_main;
273 ip_interface_address_t *ia = 0;
274 ip6_address_t *result = 0;
277 foreach_ip_interface_address (lm, ia, sw_if_index,
278 1 /* honor unnumbered */,
280 ip6_address_t * a = ip_interface_address_get_address (lm, ia);
289 ip6_add_del_interface_address (vlib_main_t * vm,
291 ip6_address_t * address,
292 u32 address_length, u32 is_del)
294 vnet_main_t *vnm = vnet_get_main ();
295 ip6_main_t *im = &ip6_main;
296 ip_lookup_main_t *lm = &im->lookup_main;
298 u32 if_address_index;
299 ip6_address_fib_t ip6_af, *addr_fib = 0;
300 ip6_address_t ll_addr;
302 /* local0 interface doesn't support IP addressing */
303 if (sw_if_index == 0)
306 clib_error_create ("local0 interface doesn't support IP addressing");
309 if (ip6_address_is_link_local_unicast (address))
311 if (address_length != 128)
313 vnm->api_errno = VNET_API_ERROR_ADDRESS_LENGTH_MISMATCH;
316 ("prefix length of link-local address must be 128");
320 return ip6_neighbor_set_link_local_address (vm, sw_if_index,
325 ll_addr = ip6_neighbor_get_link_local_address (sw_if_index);
326 if (ip6_address_is_equal (&ll_addr, address))
328 vnm->api_errno = VNET_API_ERROR_ADDRESS_NOT_DELETABLE;
329 return clib_error_create ("address not deletable");
333 vnm->api_errno = VNET_API_ERROR_ADDRESS_NOT_FOUND_FOR_INTERFACE;
334 return clib_error_create ("address not found");
339 vec_validate (im->fib_index_by_sw_if_index, sw_if_index);
340 vec_validate (im->mfib_index_by_sw_if_index, sw_if_index);
342 ip6_addr_fib_init (&ip6_af, address,
343 vec_elt (im->fib_index_by_sw_if_index, sw_if_index));
344 vec_add1 (addr_fib, ip6_af);
349 /* When adding an address check that it does not conflict
350 with an existing address on any interface in this table. */
351 ip_interface_address_t *ia;
352 vnet_sw_interface_t *sif;
354 pool_foreach(sif, vnm->interface_main.sw_interfaces,
356 if (im->fib_index_by_sw_if_index[sw_if_index] ==
357 im->fib_index_by_sw_if_index[sif->sw_if_index])
359 foreach_ip_interface_address
360 (&im->lookup_main, ia, sif->sw_if_index,
361 0 /* honor unnumbered */ ,
364 ip_interface_address_get_address
365 (&im->lookup_main, ia);
366 if (ip6_destination_matches_route
367 (im, address, x, ia->address_length) ||
368 ip6_destination_matches_route (im,
373 /* an intf may have >1 addr from the same prefix */
374 if ((sw_if_index == sif->sw_if_index) &&
375 (ia->address_length == address_length) &&
376 !ip6_address_is_equal (x, address))
379 /* error if the length or intf was different */
380 vnm->api_errno = VNET_API_ERROR_DUPLICATE_IF_ADDRESS;
383 ("failed to add %U which conflicts with %U for interface %U",
384 format_ip6_address_and_length, address,
386 format_ip6_address_and_length, x,
388 format_vnet_sw_if_index_name, vnm,
398 uword elts_before = pool_elts (lm->if_address_pool);
400 error = ip_interface_address_add_del
401 (lm, sw_if_index, addr_fib, address_length, is_del, &if_address_index);
405 /* Pool did not grow: add duplicate address. */
406 if (elts_before == pool_elts (lm->if_address_pool))
410 ip6_sw_interface_enable_disable (sw_if_index, !is_del);
412 /* intf addr routes are added/deleted on admin up/down */
413 if (vnet_sw_interface_is_admin_up (vnm, sw_if_index))
416 ip6_del_interface_routes (sw_if_index,
417 im, ip6_af.fib_index, address,
420 ip6_add_interface_routes (vnm, sw_if_index,
421 im, ip6_af.fib_index,
422 pool_elt_at_index (lm->if_address_pool,
426 ip6_add_del_interface_address_callback_t *cb;
427 vec_foreach (cb, im->add_del_interface_address_callbacks)
428 cb->function (im, cb->function_opaque, sw_if_index,
429 address, address_length, if_address_index, is_del);
439 static clib_error_t *
440 ip6_sw_interface_admin_up_down (vnet_main_t * vnm, u32 sw_if_index, u32 flags)
442 ip6_main_t *im = &ip6_main;
443 ip_interface_address_t *ia;
445 u32 is_admin_up, fib_index;
447 /* Fill in lookup tables with default table (0). */
448 vec_validate (im->fib_index_by_sw_if_index, sw_if_index);
450 vec_validate_init_empty (im->
451 lookup_main.if_address_pool_index_by_sw_if_index,
454 is_admin_up = (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) != 0;
456 fib_index = vec_elt (im->fib_index_by_sw_if_index, sw_if_index);
459 foreach_ip_interface_address (&im->lookup_main, ia, sw_if_index,
460 0 /* honor unnumbered */,
462 a = ip_interface_address_get_address (&im->lookup_main, ia);
464 ip6_add_interface_routes (vnm, sw_if_index,
468 ip6_del_interface_routes (sw_if_index, im, fib_index,
469 a, ia->address_length);
476 VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION (ip6_sw_interface_admin_up_down);
478 /* Built-in ip6 unicast rx feature path definition */
480 VNET_FEATURE_ARC_INIT (ip6_unicast, static) =
482 .arc_name = "ip6-unicast",
483 .start_nodes = VNET_FEATURES ("ip6-input"),
484 .last_in_arc = "ip6-lookup",
485 .arc_index_ptr = &ip6_main.lookup_main.ucast_feature_arc_index,
488 VNET_FEATURE_INIT (ip6_flow_classify, static) =
490 .arc_name = "ip6-unicast",
491 .node_name = "ip6-flow-classify",
492 .runs_before = VNET_FEATURES ("ip6-inacl"),
495 VNET_FEATURE_INIT (ip6_inacl, static) =
497 .arc_name = "ip6-unicast",
498 .node_name = "ip6-inacl",
499 .runs_before = VNET_FEATURES ("ip6-policer-classify"),
502 VNET_FEATURE_INIT (ip6_policer_classify, static) =
504 .arc_name = "ip6-unicast",
505 .node_name = "ip6-policer-classify",
506 .runs_before = VNET_FEATURES ("ipsec6-input-feature"),
509 VNET_FEATURE_INIT (ip6_ipsec, static) =
511 .arc_name = "ip6-unicast",
512 .node_name = "ipsec6-input-feature",
513 .runs_before = VNET_FEATURES ("l2tp-decap"),
516 VNET_FEATURE_INIT (ip6_l2tp, static) =
518 .arc_name = "ip6-unicast",
519 .node_name = "l2tp-decap",
520 .runs_before = VNET_FEATURES ("vpath-input-ip6"),
523 VNET_FEATURE_INIT (ip6_vpath, static) =
525 .arc_name = "ip6-unicast",
526 .node_name = "vpath-input-ip6",
527 .runs_before = VNET_FEATURES ("ip6-vxlan-bypass"),
530 VNET_FEATURE_INIT (ip6_vxlan_bypass, static) =
532 .arc_name = "ip6-unicast",
533 .node_name = "ip6-vxlan-bypass",
534 .runs_before = VNET_FEATURES ("ip6-lookup"),
537 VNET_FEATURE_INIT (ip6_not_enabled, static) =
539 .arc_name = "ip6-unicast",
540 .node_name = "ip6-not-enabled",
541 .runs_before = VNET_FEATURES ("ip6-lookup"),
544 VNET_FEATURE_INIT (ip6_lookup, static) =
546 .arc_name = "ip6-unicast",
547 .node_name = "ip6-lookup",
548 .runs_before = 0, /*last feature*/
551 /* Built-in ip6 multicast rx feature path definition (none now) */
552 VNET_FEATURE_ARC_INIT (ip6_multicast, static) =
554 .arc_name = "ip6-multicast",
555 .start_nodes = VNET_FEATURES ("ip6-input"),
556 .last_in_arc = "ip6-mfib-forward-lookup",
557 .arc_index_ptr = &ip6_main.lookup_main.mcast_feature_arc_index,
560 VNET_FEATURE_INIT (ip6_vpath_mc, static) = {
561 .arc_name = "ip6-multicast",
562 .node_name = "vpath-input-ip6",
563 .runs_before = VNET_FEATURES ("ip6-mfib-forward-lookup"),
566 VNET_FEATURE_INIT (ip6_not_enabled_mc, static) = {
567 .arc_name = "ip6-multicast",
568 .node_name = "ip6-not-enabled",
569 .runs_before = VNET_FEATURES ("ip6-mfib-forward-lookup"),
572 VNET_FEATURE_INIT (ip6_mc_lookup, static) = {
573 .arc_name = "ip6-multicast",
574 .node_name = "ip6-mfib-forward-lookup",
575 .runs_before = 0, /* last feature */
578 /* Built-in ip4 tx feature path definition */
579 VNET_FEATURE_ARC_INIT (ip6_output, static) =
581 .arc_name = "ip6-output",
582 .start_nodes = VNET_FEATURES ("ip6-rewrite", "ip6-midchain", "ip6-dvr-dpo"),
583 .last_in_arc = "interface-output",
584 .arc_index_ptr = &ip6_main.lookup_main.output_feature_arc_index,
587 VNET_FEATURE_INIT (ip6_outacl, static) = {
588 .arc_name = "ip6-output",
589 .node_name = "ip6-outacl",
590 .runs_before = VNET_FEATURES ("ipsec6-output-feature"),
593 VNET_FEATURE_INIT (ip6_ipsec_output, static) = {
594 .arc_name = "ip6-output",
595 .node_name = "ipsec6-output-feature",
596 .runs_before = VNET_FEATURES ("interface-output"),
599 VNET_FEATURE_INIT (ip6_interface_output, static) = {
600 .arc_name = "ip6-output",
601 .node_name = "interface-output",
602 .runs_before = 0, /* not before any other features */
606 static clib_error_t *
607 ip6_sw_interface_add_del (vnet_main_t * vnm, u32 sw_if_index, u32 is_add)
609 ip6_main_t *im = &ip6_main;
611 vec_validate (im->fib_index_by_sw_if_index, sw_if_index);
612 vec_validate (im->mfib_index_by_sw_if_index, sw_if_index);
616 /* Ensure that IPv6 is disabled */
617 ip6_main_t *im6 = &ip6_main;
618 ip_lookup_main_t *lm6 = &im6->lookup_main;
619 ip_interface_address_t *ia = 0;
620 ip6_address_t *address;
621 vlib_main_t *vm = vlib_get_main ();
623 ip6_neighbor_sw_interface_add_del (vnm, sw_if_index, 0 /* is_add */ );
624 vnet_sw_interface_update_unnumbered (sw_if_index, ~0, 0);
626 foreach_ip_interface_address (lm6, ia, sw_if_index, 0,
628 address = ip_interface_address_get_address (lm6, ia);
629 ip6_add_del_interface_address(vm, sw_if_index, address, ia->address_length, 1);
632 ip6_mfib_interface_enable_disable (sw_if_index, 0);
635 vnet_feature_enable_disable ("ip6-unicast", "ip6-not-enabled", sw_if_index,
638 vnet_feature_enable_disable ("ip6-multicast", "ip6-not-enabled",
639 sw_if_index, is_add, 0, 0);
641 return /* no error */ 0;
644 VNET_SW_INTERFACE_ADD_DEL_FUNCTION (ip6_sw_interface_add_del);
646 VLIB_NODE_FN (ip6_lookup_node) (vlib_main_t * vm,
647 vlib_node_runtime_t * node,
648 vlib_frame_t * frame)
650 return ip6_lookup_inline (vm, node, frame);
653 static u8 *format_ip6_lookup_trace (u8 * s, va_list * args);
656 VLIB_REGISTER_NODE (ip6_lookup_node) =
658 .name = "ip6-lookup",
659 .vector_size = sizeof (u32),
660 .format_trace = format_ip6_lookup_trace,
661 .n_next_nodes = IP6_LOOKUP_N_NEXT,
662 .next_nodes = IP6_LOOKUP_NEXT_NODES,
666 VLIB_NODE_FN (ip6_load_balance_node) (vlib_main_t * vm,
667 vlib_node_runtime_t * node,
668 vlib_frame_t * frame)
670 vlib_combined_counter_main_t *cm = &load_balance_main.lbm_via_counters;
672 u32 thread_index = vm->thread_index;
673 ip6_main_t *im = &ip6_main;
674 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs;
675 u16 nexts[VLIB_FRAME_SIZE], *next;
677 from = vlib_frame_vector_args (frame);
678 n_left = frame->n_vectors;
681 vlib_get_buffers (vm, from, bufs, n_left);
685 const load_balance_t *lb0, *lb1;
686 const ip6_header_t *ip0, *ip1;
687 u32 lbi0, hc0, lbi1, hc1;
688 const dpo_id_t *dpo0, *dpo1;
690 /* Prefetch next iteration. */
692 vlib_prefetch_buffer_header (b[2], STORE);
693 vlib_prefetch_buffer_header (b[3], STORE);
695 CLIB_PREFETCH (b[2]->data, sizeof (ip0[0]), STORE);
696 CLIB_PREFETCH (b[3]->data, sizeof (ip0[0]), STORE);
699 ip0 = vlib_buffer_get_current (b[0]);
700 ip1 = vlib_buffer_get_current (b[1]);
701 lbi0 = vnet_buffer (b[0])->ip.adj_index[VLIB_TX];
702 lbi1 = vnet_buffer (b[1])->ip.adj_index[VLIB_TX];
704 lb0 = load_balance_get (lbi0);
705 lb1 = load_balance_get (lbi1);
708 * this node is for via FIBs we can re-use the hash value from the
709 * to node if present.
710 * We don't want to use the same hash value at each level in the recursion
711 * graph as that would lead to polarisation
715 if (PREDICT_FALSE (lb0->lb_n_buckets > 1))
717 if (PREDICT_TRUE (vnet_buffer (b[0])->ip.flow_hash))
719 hc0 = vnet_buffer (b[0])->ip.flow_hash =
720 vnet_buffer (b[0])->ip.flow_hash >> 1;
724 hc0 = vnet_buffer (b[0])->ip.flow_hash =
725 ip6_compute_flow_hash (ip0, lb0->lb_hash_config);
727 dpo0 = load_balance_get_fwd_bucket
728 (lb0, (hc0 & (lb0->lb_n_buckets_minus_1)));
732 dpo0 = load_balance_get_bucket_i (lb0, 0);
734 if (PREDICT_FALSE (lb1->lb_n_buckets > 1))
736 if (PREDICT_TRUE (vnet_buffer (b[1])->ip.flow_hash))
738 hc1 = vnet_buffer (b[1])->ip.flow_hash =
739 vnet_buffer (b[1])->ip.flow_hash >> 1;
743 hc1 = vnet_buffer (b[1])->ip.flow_hash =
744 ip6_compute_flow_hash (ip1, lb1->lb_hash_config);
746 dpo1 = load_balance_get_fwd_bucket
747 (lb1, (hc1 & (lb1->lb_n_buckets_minus_1)));
751 dpo1 = load_balance_get_bucket_i (lb1, 0);
754 next[0] = dpo0->dpoi_next_node;
755 next[1] = dpo1->dpoi_next_node;
757 /* Only process the HBH Option Header if explicitly configured to do so */
758 if (PREDICT_FALSE (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
760 next[0] = (dpo_is_adj (dpo0) && im->hbh_enabled) ?
761 (ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next[0];
763 /* Only process the HBH Option Header if explicitly configured to do so */
764 if (PREDICT_FALSE (ip1->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
766 next[1] = (dpo_is_adj (dpo1) && im->hbh_enabled) ?
767 (ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next[1];
770 vnet_buffer (b[0])->ip.adj_index[VLIB_TX] = dpo0->dpoi_index;
771 vnet_buffer (b[1])->ip.adj_index[VLIB_TX] = dpo1->dpoi_index;
773 vlib_increment_combined_counter
774 (cm, thread_index, lbi0, 1, vlib_buffer_length_in_chain (vm, b[0]));
775 vlib_increment_combined_counter
776 (cm, thread_index, lbi1, 1, vlib_buffer_length_in_chain (vm, b[1]));
785 const load_balance_t *lb0;
786 const ip6_header_t *ip0;
787 const dpo_id_t *dpo0;
790 ip0 = vlib_buffer_get_current (b[0]);
791 lbi0 = vnet_buffer (b[0])->ip.adj_index[VLIB_TX];
793 lb0 = load_balance_get (lbi0);
796 if (PREDICT_FALSE (lb0->lb_n_buckets > 1))
798 if (PREDICT_TRUE (vnet_buffer (b[0])->ip.flow_hash))
800 hc0 = vnet_buffer (b[0])->ip.flow_hash =
801 vnet_buffer (b[0])->ip.flow_hash >> 1;
805 hc0 = vnet_buffer (b[0])->ip.flow_hash =
806 ip6_compute_flow_hash (ip0, lb0->lb_hash_config);
808 dpo0 = load_balance_get_fwd_bucket
809 (lb0, (hc0 & (lb0->lb_n_buckets_minus_1)));
813 dpo0 = load_balance_get_bucket_i (lb0, 0);
816 next[0] = dpo0->dpoi_next_node;
817 vnet_buffer (b[0])->ip.adj_index[VLIB_TX] = dpo0->dpoi_index;
819 /* Only process the HBH Option Header if explicitly configured to do so */
820 if (PREDICT_FALSE (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
822 next[0] = (dpo_is_adj (dpo0) && im->hbh_enabled) ?
823 (ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next[0];
826 vlib_increment_combined_counter
827 (cm, thread_index, lbi0, 1, vlib_buffer_length_in_chain (vm, b[0]));
834 vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors);
836 if (node->flags & VLIB_NODE_FLAG_TRACE)
837 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
839 return frame->n_vectors;
843 VLIB_REGISTER_NODE (ip6_load_balance_node) =
845 .name = "ip6-load-balance",
846 .vector_size = sizeof (u32),
847 .sibling_of = "ip6-lookup",
848 .format_trace = format_ip6_lookup_trace,
854 /* Adjacency taken. */
859 /* Packet data, possibly *after* rewrite. */
860 u8 packet_data[128 - 1 * sizeof (u32)];
862 ip6_forward_next_trace_t;
864 #ifndef CLIB_MARCH_VARIANT
866 format_ip6_forward_next_trace (u8 * s, va_list * args)
868 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
869 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
870 ip6_forward_next_trace_t *t = va_arg (*args, ip6_forward_next_trace_t *);
871 u32 indent = format_get_indent (s);
873 s = format (s, "%U%U",
874 format_white_space, indent,
875 format_ip6_header, t->packet_data, sizeof (t->packet_data));
881 format_ip6_lookup_trace (u8 * s, va_list * args)
883 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
884 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
885 ip6_forward_next_trace_t *t = va_arg (*args, ip6_forward_next_trace_t *);
886 u32 indent = format_get_indent (s);
888 s = format (s, "fib %d dpo-idx %d flow hash: 0x%08x",
889 t->fib_index, t->adj_index, t->flow_hash);
890 s = format (s, "\n%U%U",
891 format_white_space, indent,
892 format_ip6_header, t->packet_data, sizeof (t->packet_data));
898 format_ip6_rewrite_trace (u8 * s, va_list * args)
900 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
901 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
902 ip6_forward_next_trace_t *t = va_arg (*args, ip6_forward_next_trace_t *);
903 u32 indent = format_get_indent (s);
905 s = format (s, "tx_sw_if_index %d adj-idx %d : %U flow hash: 0x%08x",
906 t->fib_index, t->adj_index, format_ip_adjacency,
907 t->adj_index, FORMAT_IP_ADJACENCY_NONE, t->flow_hash);
908 s = format (s, "\n%U%U",
909 format_white_space, indent,
910 format_ip_adjacency_packet_data,
911 t->packet_data, sizeof (t->packet_data));
915 /* Common trace function for all ip6-forward next nodes. */
916 #ifndef CLIB_MARCH_VARIANT
918 ip6_forward_next_trace (vlib_main_t * vm,
919 vlib_node_runtime_t * node,
920 vlib_frame_t * frame, vlib_rx_or_tx_t which_adj_index)
923 ip6_main_t *im = &ip6_main;
925 n_left = frame->n_vectors;
926 from = vlib_frame_vector_args (frame);
931 vlib_buffer_t *b0, *b1;
932 ip6_forward_next_trace_t *t0, *t1;
934 /* Prefetch next iteration. */
935 vlib_prefetch_buffer_with_index (vm, from[2], LOAD);
936 vlib_prefetch_buffer_with_index (vm, from[3], LOAD);
941 b0 = vlib_get_buffer (vm, bi0);
942 b1 = vlib_get_buffer (vm, bi1);
944 if (b0->flags & VLIB_BUFFER_IS_TRACED)
946 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
947 t0->adj_index = vnet_buffer (b0)->ip.adj_index[which_adj_index];
948 t0->flow_hash = vnet_buffer (b0)->ip.flow_hash;
950 (vnet_buffer (b0)->sw_if_index[VLIB_TX] !=
951 (u32) ~ 0) ? vnet_buffer (b0)->sw_if_index[VLIB_TX] :
952 vec_elt (im->fib_index_by_sw_if_index,
953 vnet_buffer (b0)->sw_if_index[VLIB_RX]);
955 clib_memcpy_fast (t0->packet_data,
956 vlib_buffer_get_current (b0),
957 sizeof (t0->packet_data));
959 if (b1->flags & VLIB_BUFFER_IS_TRACED)
961 t1 = vlib_add_trace (vm, node, b1, sizeof (t1[0]));
962 t1->adj_index = vnet_buffer (b1)->ip.adj_index[which_adj_index];
963 t1->flow_hash = vnet_buffer (b1)->ip.flow_hash;
965 (vnet_buffer (b1)->sw_if_index[VLIB_TX] !=
966 (u32) ~ 0) ? vnet_buffer (b1)->sw_if_index[VLIB_TX] :
967 vec_elt (im->fib_index_by_sw_if_index,
968 vnet_buffer (b1)->sw_if_index[VLIB_RX]);
970 clib_memcpy_fast (t1->packet_data,
971 vlib_buffer_get_current (b1),
972 sizeof (t1->packet_data));
982 ip6_forward_next_trace_t *t0;
986 b0 = vlib_get_buffer (vm, bi0);
988 if (b0->flags & VLIB_BUFFER_IS_TRACED)
990 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
991 t0->adj_index = vnet_buffer (b0)->ip.adj_index[which_adj_index];
992 t0->flow_hash = vnet_buffer (b0)->ip.flow_hash;
994 (vnet_buffer (b0)->sw_if_index[VLIB_TX] !=
995 (u32) ~ 0) ? vnet_buffer (b0)->sw_if_index[VLIB_TX] :
996 vec_elt (im->fib_index_by_sw_if_index,
997 vnet_buffer (b0)->sw_if_index[VLIB_RX]);
999 clib_memcpy_fast (t0->packet_data,
1000 vlib_buffer_get_current (b0),
1001 sizeof (t0->packet_data));
1008 /* Compute TCP/UDP/ICMP6 checksum in software. */
1010 ip6_tcp_udp_icmp_compute_checksum (vlib_main_t * vm, vlib_buffer_t * p0,
1011 ip6_header_t * ip0, int *bogus_lengthp)
1014 u16 payload_length_host_byte_order;
1016 u32 headers_size = sizeof (ip0[0]);
1017 u8 *data_this_buffer;
1019 ASSERT (bogus_lengthp);
1022 /* Initialize checksum with ip header. */
1023 sum0 = ip0->payload_length + clib_host_to_net_u16 (ip0->protocol);
1024 payload_length_host_byte_order = clib_net_to_host_u16 (ip0->payload_length);
1025 data_this_buffer = (u8 *) (ip0 + 1);
1027 for (i = 0; i < ARRAY_LEN (ip0->src_address.as_uword); i++)
1029 sum0 = ip_csum_with_carry
1030 (sum0, clib_mem_unaligned (&ip0->src_address.as_uword[i], uword));
1031 sum0 = ip_csum_with_carry
1032 (sum0, clib_mem_unaligned (&ip0->dst_address.as_uword[i], uword));
1035 /* some icmp packets may come with a "router alert" hop-by-hop extension header (e.g., mldv2 packets)
1036 * or UDP-Ping packets */
1037 if (PREDICT_FALSE (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
1040 ip6_hop_by_hop_ext_t *ext_hdr =
1041 (ip6_hop_by_hop_ext_t *) data_this_buffer;
1043 /* validate really icmp6 next */
1044 ASSERT ((ext_hdr->next_hdr == IP_PROTOCOL_ICMP6)
1045 || (ext_hdr->next_hdr == IP_PROTOCOL_UDP));
1047 skip_bytes = 8 * (1 + ext_hdr->n_data_u64s);
1048 data_this_buffer = (void *) ((u8 *) data_this_buffer + skip_bytes);
1050 payload_length_host_byte_order -= skip_bytes;
1051 headers_size += skip_bytes;
1055 return ip_calculate_l4_checksum (vm, p0, sum0,
1056 payload_length_host_byte_order,
1057 (u8 *) ip0, headers_size, NULL);
1059 return ip_calculate_l4_checksum (vm, 0, sum0,
1060 payload_length_host_byte_order, NULL, 0,
1065 ip6_tcp_udp_icmp_validate_checksum (vlib_main_t * vm, vlib_buffer_t * p0)
1067 ip6_header_t *ip0 = vlib_buffer_get_current (p0);
1072 /* some icmp packets may come with a "router alert" hop-by-hop extension header (e.g., mldv2 packets) */
1073 ASSERT (ip0->protocol == IP_PROTOCOL_TCP
1074 || ip0->protocol == IP_PROTOCOL_ICMP6
1075 || ip0->protocol == IP_PROTOCOL_UDP
1076 || ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS);
1078 udp0 = (void *) (ip0 + 1);
1079 if (ip0->protocol == IP_PROTOCOL_UDP && udp0->checksum == 0)
1081 p0->flags |= (VNET_BUFFER_F_L4_CHECKSUM_COMPUTED
1082 | VNET_BUFFER_F_L4_CHECKSUM_CORRECT);
1086 sum16 = ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip0, &bogus_length);
1088 p0->flags |= (VNET_BUFFER_F_L4_CHECKSUM_COMPUTED
1089 | ((sum16 == 0) << VNET_BUFFER_F_LOG2_L4_CHECKSUM_CORRECT));
1096 * @brief returns number of links on which src is reachable.
1099 ip6_urpf_loose_check (ip6_main_t * im, vlib_buffer_t * b, ip6_header_t * i)
1101 const load_balance_t *lb0;
1105 fib_index = vec_elt (im->fib_index_by_sw_if_index,
1106 vnet_buffer (b)->sw_if_index[VLIB_RX]);
1108 (vnet_buffer (b)->sw_if_index[VLIB_TX] == (u32) ~ 0) ?
1109 fib_index : vnet_buffer (b)->sw_if_index[VLIB_TX];
1111 lbi = ip6_fib_table_fwding_lookup (fib_index, &i->src_address);
1112 lb0 = load_balance_get (lbi);
1114 return (fib_urpf_check_size (lb0->lb_urpf));
1118 ip6_next_proto_is_tcp_udp (vlib_buffer_t * p0, ip6_header_t * ip0,
1122 proto0 = ip6_locate_header (p0, ip0, IP_PROTOCOL_UDP, udp_offset0);
1123 if (proto0 != IP_PROTOCOL_UDP)
1125 proto0 = ip6_locate_header (p0, ip0, IP_PROTOCOL_TCP, udp_offset0);
1126 proto0 = (proto0 == IP_PROTOCOL_TCP) ? proto0 : 0;
1132 VNET_FEATURE_ARC_INIT (ip6_local) =
1134 .arc_name = "ip6-local",
1135 .start_nodes = VNET_FEATURES ("ip6-local"),
1140 ip6_local_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
1141 vlib_frame_t * frame, int head_of_feature_arc)
1143 ip6_main_t *im = &ip6_main;
1144 ip_lookup_main_t *lm = &im->lookup_main;
1145 u32 *from, n_left_from;
1146 vlib_node_runtime_t *error_node =
1147 vlib_node_get_runtime (vm, ip6_input_node.index);
1148 u8 arc_index = vnet_feat_arc_ip6_local.feature_arc_index;
1149 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
1150 u16 nexts[VLIB_FRAME_SIZE], *next;
1152 from = vlib_frame_vector_args (frame);
1153 n_left_from = frame->n_vectors;
1155 if (node->flags & VLIB_NODE_FLAG_TRACE)
1156 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
1158 vlib_get_buffers (vm, from, bufs, n_left_from);
1162 while (n_left_from > 2)
1164 /* Prefetch next iteration. */
1165 if (n_left_from >= 6)
1167 vlib_prefetch_buffer_header (b[4], STORE);
1168 vlib_prefetch_buffer_header (b[5], STORE);
1169 vlib_prefetch_buffer_data (b[2], LOAD);
1170 vlib_prefetch_buffer_data (b[3], LOAD);
1174 error[0] = IP6_ERROR_UNKNOWN_PROTOCOL;
1175 error[1] = IP6_ERROR_UNKNOWN_PROTOCOL;
1177 ip6_header_t *ip[2];
1178 ip[0] = vlib_buffer_get_current (b[0]);
1179 ip[1] = vlib_buffer_get_current (b[1]);
1181 if (head_of_feature_arc)
1183 vnet_buffer (b[0])->l3_hdr_offset = b[0]->current_data;
1184 vnet_buffer (b[1])->l3_hdr_offset = b[1]->current_data;
1187 type[0] = lm->builtin_protocol_by_ip_protocol[ip[0]->protocol];
1188 type[1] = lm->builtin_protocol_by_ip_protocol[ip[1]->protocol];
1191 flags[0] = b[0]->flags;
1192 flags[1] = b[1]->flags;
1194 u32 good_l4_csum[2];
1196 flags[0] & (VNET_BUFFER_F_L4_CHECKSUM_CORRECT |
1197 VNET_BUFFER_F_OFFLOAD_TCP_CKSUM |
1198 VNET_BUFFER_F_OFFLOAD_UDP_CKSUM);
1200 flags[1] & (VNET_BUFFER_F_L4_CHECKSUM_CORRECT |
1201 VNET_BUFFER_F_OFFLOAD_TCP_CKSUM |
1202 VNET_BUFFER_F_OFFLOAD_UDP_CKSUM);
1204 u32 udp_offset[2] = { };
1207 ip6_next_proto_is_tcp_udp (b[0], ip[0], &udp_offset[0]);
1209 ip6_next_proto_is_tcp_udp (b[1], ip[1], &udp_offset[1]);
1210 i16 len_diff[2] = { 0 };
1211 if (PREDICT_TRUE (is_tcp_udp[0]))
1214 (udp_header_t *) ((u8 *) ip[0] + udp_offset[0]);
1215 good_l4_csum[0] |= type[0] == IP_BUILTIN_PROTOCOL_UDP
1216 && udp->checksum == 0;
1217 /* optimistically verify UDP length. */
1218 u16 ip_len, udp_len;
1219 ip_len = clib_net_to_host_u16 (ip[0]->payload_length);
1220 udp_len = clib_net_to_host_u16 (udp->length);
1221 len_diff[0] = ip_len - udp_len;
1223 if (PREDICT_TRUE (is_tcp_udp[1]))
1226 (udp_header_t *) ((u8 *) ip[1] + udp_offset[1]);
1227 good_l4_csum[1] |= type[1] == IP_BUILTIN_PROTOCOL_UDP
1228 && udp->checksum == 0;
1229 /* optimistically verify UDP length. */
1230 u16 ip_len, udp_len;
1231 ip_len = clib_net_to_host_u16 (ip[1]->payload_length);
1232 udp_len = clib_net_to_host_u16 (udp->length);
1233 len_diff[1] = ip_len - udp_len;
1236 good_l4_csum[0] |= type[0] == IP_BUILTIN_PROTOCOL_UNKNOWN;
1237 good_l4_csum[1] |= type[1] == IP_BUILTIN_PROTOCOL_UNKNOWN;
1239 len_diff[0] = type[0] == IP_BUILTIN_PROTOCOL_UDP ? len_diff[0] : 0;
1240 len_diff[1] = type[1] == IP_BUILTIN_PROTOCOL_UDP ? len_diff[1] : 0;
1243 need_csum[0] = type[0] != IP_BUILTIN_PROTOCOL_UNKNOWN
1245 && !(flags[0] & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED);
1246 need_csum[1] = type[1] != IP_BUILTIN_PROTOCOL_UNKNOWN
1248 && !(flags[1] & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED);
1249 if (PREDICT_FALSE (need_csum[0]))
1251 flags[0] = ip6_tcp_udp_icmp_validate_checksum (vm, b[0]);
1252 good_l4_csum[0] = flags[0] & VNET_BUFFER_F_L4_CHECKSUM_CORRECT;
1254 if (PREDICT_FALSE (need_csum[1]))
1256 flags[1] = ip6_tcp_udp_icmp_validate_checksum (vm, b[1]);
1257 good_l4_csum[1] = flags[1] & VNET_BUFFER_F_L4_CHECKSUM_CORRECT;
1260 error[0] = IP6_ERROR_UNKNOWN_PROTOCOL;
1261 error[0] = len_diff[0] < 0 ? IP6_ERROR_UDP_LENGTH : error[0];
1262 error[1] = IP6_ERROR_UNKNOWN_PROTOCOL;
1263 error[1] = len_diff[1] < 0 ? IP6_ERROR_UDP_LENGTH : error[1];
1265 STATIC_ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_UDP ==
1266 IP6_ERROR_UDP_CHECKSUM,
1267 "Wrong IP6 errors constants");
1268 STATIC_ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_ICMP ==
1269 IP6_ERROR_ICMP_CHECKSUM,
1270 "Wrong IP6 errors constants");
1273 !good_l4_csum[0] ? IP6_ERROR_UDP_CHECKSUM + type[0] : error[0];
1275 !good_l4_csum[1] ? IP6_ERROR_UDP_CHECKSUM + type[1] : error[1];
1277 /* Drop packets from unroutable hosts. */
1278 /* If this is a neighbor solicitation (ICMP), skip source RPF check */
1280 unroutable[0] = error[0] == IP6_ERROR_UNKNOWN_PROTOCOL
1281 && type[0] != IP_BUILTIN_PROTOCOL_ICMP
1282 && !ip6_address_is_link_local_unicast (&ip[0]->src_address);
1283 unroutable[1] = error[1] == IP6_ERROR_UNKNOWN_PROTOCOL
1284 && type[1] != IP_BUILTIN_PROTOCOL_ICMP
1285 && !ip6_address_is_link_local_unicast (&ip[1]->src_address);
1286 if (PREDICT_FALSE (unroutable[0]))
1289 !ip6_urpf_loose_check (im, b[0],
1290 ip[0]) ? IP6_ERROR_SRC_LOOKUP_MISS
1293 if (PREDICT_FALSE (unroutable[1]))
1296 !ip6_urpf_loose_check (im, b[1],
1297 ip[1]) ? IP6_ERROR_SRC_LOOKUP_MISS
1301 vnet_buffer (b[0])->ip.fib_index =
1302 vnet_buffer (b[0])->sw_if_index[VLIB_TX] != ~0 ?
1303 vnet_buffer (b[0])->sw_if_index[VLIB_TX] :
1304 vnet_buffer (b[0])->ip.fib_index;
1305 vnet_buffer (b[1])->ip.fib_index =
1306 vnet_buffer (b[1])->sw_if_index[VLIB_TX] != ~0 ?
1307 vnet_buffer (b[1])->sw_if_index[VLIB_TX] :
1308 vnet_buffer (b[1])->ip.fib_index;
1309 } /* head_of_feature_arc */
1311 next[0] = lm->local_next_by_ip_protocol[ip[0]->protocol];
1313 error[0] != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next[0];
1314 next[1] = lm->local_next_by_ip_protocol[ip[1]->protocol];
1316 error[1] != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next[1];
1318 b[0]->error = error_node->errors[0];
1319 b[1]->error = error_node->errors[1];
1321 if (head_of_feature_arc)
1324 ip6_unknown[0] = error[0] == (u8) IP6_ERROR_UNKNOWN_PROTOCOL;
1325 ip6_unknown[1] = error[1] == (u8) IP6_ERROR_UNKNOWN_PROTOCOL;
1326 if (PREDICT_TRUE (ip6_unknown[0]))
1328 u32 next32 = next[0];
1329 vnet_feature_arc_start (arc_index,
1330 vnet_buffer (b[0])->sw_if_index
1331 [VLIB_RX], &next32, b[0]);
1334 if (PREDICT_TRUE (ip6_unknown[1]))
1336 u32 next32 = next[1];
1337 vnet_feature_arc_start (arc_index,
1338 vnet_buffer (b[1])->sw_if_index
1339 [VLIB_RX], &next32, b[1]);
1353 error = IP6_ERROR_UNKNOWN_PROTOCOL;
1356 ip = vlib_buffer_get_current (b[0]);
1358 if (head_of_feature_arc)
1360 vnet_buffer (b[0])->l3_hdr_offset = b[0]->current_data;
1361 u8 type = lm->builtin_protocol_by_ip_protocol[ip->protocol];
1363 u32 flags = b[0]->flags;
1365 flags & (VNET_BUFFER_F_L4_CHECKSUM_CORRECT |
1366 VNET_BUFFER_F_OFFLOAD_TCP_CKSUM |
1367 VNET_BUFFER_F_OFFLOAD_UDP_CKSUM);
1371 u8 is_tcp_udp = ip6_next_proto_is_tcp_udp (b[0], ip, &udp_offset);
1372 if (PREDICT_TRUE (is_tcp_udp))
1374 udp_header_t *udp = (udp_header_t *) ((u8 *) ip + udp_offset);
1375 /* Don't verify UDP checksum for packets with explicit zero checksum. */
1376 good_l4_csum |= type == IP_BUILTIN_PROTOCOL_UDP
1377 && udp->checksum == 0;
1378 /* optimistically verify UDP length. */
1379 u16 ip_len, udp_len;
1380 ip_len = clib_net_to_host_u16 (ip->payload_length);
1381 udp_len = clib_net_to_host_u16 (udp->length);
1382 len_diff = ip_len - udp_len;
1385 good_l4_csum |= type == IP_BUILTIN_PROTOCOL_UNKNOWN;
1386 len_diff = type == IP_BUILTIN_PROTOCOL_UDP ? len_diff : 0;
1388 u8 need_csum = type != IP_BUILTIN_PROTOCOL_UNKNOWN && !good_l4_csum
1389 && !(flags & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED);
1390 if (PREDICT_FALSE (need_csum))
1392 flags = ip6_tcp_udp_icmp_validate_checksum (vm, b[0]);
1393 good_l4_csum = flags & VNET_BUFFER_F_L4_CHECKSUM_CORRECT;
1396 error = IP6_ERROR_UNKNOWN_PROTOCOL;
1397 error = len_diff < 0 ? IP6_ERROR_UDP_LENGTH : error;
1399 STATIC_ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_UDP ==
1400 IP6_ERROR_UDP_CHECKSUM,
1401 "Wrong IP6 errors constants");
1402 STATIC_ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_ICMP ==
1403 IP6_ERROR_ICMP_CHECKSUM,
1404 "Wrong IP6 errors constants");
1406 error = !good_l4_csum ? IP6_ERROR_UDP_CHECKSUM + type : error;
1408 /* Drop packets from unroutable hosts. */
1409 /* If this is a neighbor solicitation (ICMP), skip source RPF check */
1410 u8 unroutable = error == IP6_ERROR_UNKNOWN_PROTOCOL
1411 && type != IP_BUILTIN_PROTOCOL_ICMP
1412 && !ip6_address_is_link_local_unicast (&ip->src_address);
1413 if (PREDICT_FALSE (unroutable))
1416 !ip6_urpf_loose_check (im, b[0],
1417 ip) ? IP6_ERROR_SRC_LOOKUP_MISS :
1421 vnet_buffer (b[0])->ip.fib_index =
1422 vnet_buffer (b[0])->sw_if_index[VLIB_TX] != ~0 ?
1423 vnet_buffer (b[0])->sw_if_index[VLIB_TX] :
1424 vnet_buffer (b[0])->ip.fib_index;
1425 } /* head_of_feature_arc */
1427 next[0] = lm->local_next_by_ip_protocol[ip->protocol];
1429 error != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next[0];
1431 b[0]->error = error_node->errors[0];
1433 if (head_of_feature_arc)
1435 if (PREDICT_TRUE (error == (u8) IP6_ERROR_UNKNOWN_PROTOCOL))
1437 u32 next32 = next[0];
1438 vnet_feature_arc_start (arc_index,
1439 vnet_buffer (b[0])->sw_if_index
1440 [VLIB_RX], &next32, b[0]);
1451 vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors);
1452 return frame->n_vectors;
1455 VLIB_NODE_FN (ip6_local_node) (vlib_main_t * vm, vlib_node_runtime_t * node,
1456 vlib_frame_t * frame)
1458 return ip6_local_inline (vm, node, frame, 1 /* head of feature arc */ );
1462 VLIB_REGISTER_NODE (ip6_local_node) =
1464 .name = "ip6-local",
1465 .vector_size = sizeof (u32),
1466 .format_trace = format_ip6_forward_next_trace,
1467 .n_next_nodes = IP_LOCAL_N_NEXT,
1470 [IP_LOCAL_NEXT_DROP] = "ip6-drop",
1471 [IP_LOCAL_NEXT_PUNT] = "ip6-punt",
1472 [IP_LOCAL_NEXT_UDP_LOOKUP] = "ip6-udp-lookup",
1473 [IP_LOCAL_NEXT_ICMP] = "ip6-icmp-input",
1474 [IP_LOCAL_NEXT_REASSEMBLY] = "ip6-full-reassembly",
1479 VLIB_NODE_FN (ip6_local_end_of_arc_node) (vlib_main_t * vm,
1480 vlib_node_runtime_t * node,
1481 vlib_frame_t * frame)
1483 return ip6_local_inline (vm, node, frame, 0 /* head of feature arc */ );
1487 VLIB_REGISTER_NODE (ip6_local_end_of_arc_node) = {
1488 .name = "ip6-local-end-of-arc",
1489 .vector_size = sizeof (u32),
1491 .format_trace = format_ip6_forward_next_trace,
1492 .sibling_of = "ip6-local",
1495 VNET_FEATURE_INIT (ip6_local_end_of_arc, static) = {
1496 .arc_name = "ip6-local",
1497 .node_name = "ip6-local-end-of-arc",
1498 .runs_before = 0, /* not before any other features */
1502 #ifdef CLIB_MARCH_VARIANT
1503 extern vlib_node_registration_t ip6_local_node;
1508 ip6_register_protocol (u32 protocol, u32 node_index)
1510 vlib_main_t *vm = vlib_get_main ();
1511 ip6_main_t *im = &ip6_main;
1512 ip_lookup_main_t *lm = &im->lookup_main;
1514 ASSERT (protocol < ARRAY_LEN (lm->local_next_by_ip_protocol));
1515 lm->local_next_by_ip_protocol[protocol] =
1516 vlib_node_add_next (vm, ip6_local_node.index, node_index);
1520 ip6_unregister_protocol (u32 protocol)
1522 ip6_main_t *im = &ip6_main;
1523 ip_lookup_main_t *lm = &im->lookup_main;
1525 ASSERT (protocol < ARRAY_LEN (lm->local_next_by_ip_protocol));
1526 lm->local_next_by_ip_protocol[protocol] = IP_LOCAL_NEXT_PUNT;
1530 ip6_probe_neighbor (vlib_main_t * vm, ip6_address_t * dst, u32 sw_if_index,
1533 vnet_main_t *vnm = vnet_get_main ();
1534 ip6_main_t *im = &ip6_main;
1535 icmp6_neighbor_solicitation_header_t *h;
1537 ip_interface_address_t *ia;
1538 ip_adjacency_t *adj;
1539 vnet_hw_interface_t *hi;
1540 vnet_sw_interface_t *si;
1546 si = vnet_get_sw_interface (vnm, sw_if_index);
1548 if (!(si->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP))
1550 return clib_error_return (0, "%U: interface %U down",
1551 format_ip6_address, dst,
1552 format_vnet_sw_if_index_name, vnm,
1557 ip6_interface_address_matching_destination (im, dst, sw_if_index, &ia);
1560 vnm->api_errno = VNET_API_ERROR_NO_MATCHING_INTERFACE;
1561 return clib_error_return
1562 (0, "no matching interface address for destination %U (interface %U)",
1563 format_ip6_address, dst,
1564 format_vnet_sw_if_index_name, vnm, sw_if_index);
1568 vlib_packet_template_get_packet (vm,
1569 &im->discover_neighbor_packet_template,
1572 return clib_error_return (0, "ICMP6 NS packet allocation failed");
1574 hi = vnet_get_sup_hw_interface (vnm, sw_if_index);
1576 /* Destination address is a solicited node multicast address. We need to fill in
1577 the low 24 bits with low 24 bits of target's address. */
1578 h->ip.dst_address.as_u8[13] = dst->as_u8[13];
1579 h->ip.dst_address.as_u8[14] = dst->as_u8[14];
1580 h->ip.dst_address.as_u8[15] = dst->as_u8[15];
1582 h->ip.src_address = src[0];
1583 h->neighbor.target_address = dst[0];
1585 if (PREDICT_FALSE (!hi->hw_address))
1587 return clib_error_return (0, "%U: interface %U do not support ip probe",
1588 format_ip6_address, dst,
1589 format_vnet_sw_if_index_name, vnm,
1593 clib_memcpy_fast (h->link_layer_option.ethernet_address, hi->hw_address,
1594 vec_len (hi->hw_address));
1596 h->neighbor.icmp.checksum =
1597 ip6_tcp_udp_icmp_compute_checksum (vm, 0, &h->ip, &bogus_length);
1598 ASSERT (bogus_length == 0);
1600 b = vlib_get_buffer (vm, bi);
1601 vnet_buffer (b)->sw_if_index[VLIB_RX] =
1602 vnet_buffer (b)->sw_if_index[VLIB_TX] = sw_if_index;
1604 /* Add encapsulation string for software interface (e.g. ethernet header). */
1605 ip46_address_t nh = {
1609 ai = adj_nbr_add_or_lock (FIB_PROTOCOL_IP6,
1610 VNET_LINK_IP6, &nh, sw_if_index);
1613 /* Peer has been previously resolved, retrieve glean adj instead */
1614 if (adj->lookup_next_index == IP_LOOKUP_NEXT_REWRITE && refresh == 0)
1617 ai = adj_glean_add_or_lock (FIB_PROTOCOL_IP6,
1618 VNET_LINK_IP6, sw_if_index, &nh);
1622 vnet_rewrite_one_header (adj[0], h, sizeof (ethernet_header_t));
1623 vlib_buffer_advance (b, -adj->rewrite_header.data_bytes);
1626 vlib_frame_t *f = vlib_get_frame_to_node (vm, hi->output_node_index);
1627 u32 *to_next = vlib_frame_vector_args (f);
1630 vlib_put_frame_to_node (vm, hi->output_node_index, f);
1634 return /* no error */ 0;
1640 IP6_REWRITE_NEXT_DROP,
1641 IP6_REWRITE_NEXT_ICMP_ERROR,
1642 IP6_REWRITE_NEXT_FRAGMENT,
1643 IP6_REWRITE_N_NEXT /* Last */
1644 } ip6_rewrite_next_t;
1647 * This bits of an IPv6 address to mask to construct a multicast
1650 #define IP6_MCAST_ADDR_MASK 0xffffffff
1653 ip6_mtu_check (vlib_buffer_t * b, u16 packet_bytes,
1654 u16 adj_packet_bytes, bool is_locally_generated,
1655 u32 * next, u8 is_midchain, u32 * error)
1657 if (adj_packet_bytes >= 1280 && packet_bytes > adj_packet_bytes)
1659 if (is_locally_generated)
1661 /* IP fragmentation */
1662 ip_frag_set_vnet_buffer (b, adj_packet_bytes,
1664 IP_FRAG_NEXT_IP_REWRITE_MIDCHAIN :
1665 IP_FRAG_NEXT_IP_REWRITE), 0);
1666 *next = IP6_REWRITE_NEXT_FRAGMENT;
1667 *error = IP6_ERROR_MTU_EXCEEDED;
1671 *error = IP6_ERROR_MTU_EXCEEDED;
1672 icmp6_error_set_vnet_buffer (b, ICMP6_packet_too_big, 0,
1674 *next = IP6_REWRITE_NEXT_ICMP_ERROR;
1680 ip6_rewrite_inline_with_gso (vlib_main_t * vm,
1681 vlib_node_runtime_t * node,
1682 vlib_frame_t * frame,
1683 int do_counters, int is_midchain, int is_mcast,
1686 ip_lookup_main_t *lm = &ip6_main.lookup_main;
1687 u32 *from = vlib_frame_vector_args (frame);
1688 u32 n_left_from, n_left_to_next, *to_next, next_index;
1689 vlib_node_runtime_t *error_node =
1690 vlib_node_get_runtime (vm, ip6_input_node.index);
1692 n_left_from = frame->n_vectors;
1693 next_index = node->cached_next_index;
1694 u32 thread_index = vm->thread_index;
1696 while (n_left_from > 0)
1698 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1700 while (n_left_from >= 4 && n_left_to_next >= 2)
1702 const ip_adjacency_t *adj0, *adj1;
1703 vlib_buffer_t *p0, *p1;
1704 ip6_header_t *ip0, *ip1;
1705 u32 pi0, rw_len0, next0, error0, adj_index0;
1706 u32 pi1, rw_len1, next1, error1, adj_index1;
1707 u32 tx_sw_if_index0, tx_sw_if_index1;
1708 bool is_locally_originated0, is_locally_originated1;
1710 /* Prefetch next iteration. */
1712 vlib_buffer_t *p2, *p3;
1714 p2 = vlib_get_buffer (vm, from[2]);
1715 p3 = vlib_get_buffer (vm, from[3]);
1717 vlib_prefetch_buffer_header (p2, LOAD);
1718 vlib_prefetch_buffer_header (p3, LOAD);
1720 CLIB_PREFETCH (p2->pre_data, 32, STORE);
1721 CLIB_PREFETCH (p3->pre_data, 32, STORE);
1723 CLIB_PREFETCH (p2->data, sizeof (ip0[0]), STORE);
1724 CLIB_PREFETCH (p3->data, sizeof (ip0[0]), STORE);
1727 pi0 = to_next[0] = from[0];
1728 pi1 = to_next[1] = from[1];
1733 n_left_to_next -= 2;
1735 p0 = vlib_get_buffer (vm, pi0);
1736 p1 = vlib_get_buffer (vm, pi1);
1738 adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
1739 adj_index1 = vnet_buffer (p1)->ip.adj_index[VLIB_TX];
1741 ip0 = vlib_buffer_get_current (p0);
1742 ip1 = vlib_buffer_get_current (p1);
1744 error0 = error1 = IP6_ERROR_NONE;
1745 next0 = next1 = IP6_REWRITE_NEXT_DROP;
1747 is_locally_originated0 =
1748 p0->flags & VNET_BUFFER_F_LOCALLY_ORIGINATED;
1749 if (PREDICT_TRUE (!is_locally_originated0))
1751 i32 hop_limit0 = ip0->hop_limit;
1753 /* Input node should have reject packets with hop limit 0. */
1754 ASSERT (ip0->hop_limit > 0);
1758 ip0->hop_limit = hop_limit0;
1761 * If the hop count drops below 1 when forwarding, generate
1764 if (PREDICT_FALSE (hop_limit0 <= 0))
1766 error0 = IP6_ERROR_TIME_EXPIRED;
1767 next0 = IP6_REWRITE_NEXT_ICMP_ERROR;
1768 vnet_buffer (p0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
1769 icmp6_error_set_vnet_buffer (p0, ICMP6_time_exceeded,
1770 ICMP6_time_exceeded_ttl_exceeded_in_transit,
1776 p0->flags &= ~VNET_BUFFER_F_LOCALLY_ORIGINATED;
1778 is_locally_originated1 =
1779 p1->flags & VNET_BUFFER_F_LOCALLY_ORIGINATED;
1780 if (PREDICT_TRUE (!is_locally_originated1))
1782 i32 hop_limit1 = ip1->hop_limit;
1784 /* Input node should have reject packets with hop limit 0. */
1785 ASSERT (ip1->hop_limit > 0);
1789 ip1->hop_limit = hop_limit1;
1792 * If the hop count drops below 1 when forwarding, generate
1795 if (PREDICT_FALSE (hop_limit1 <= 0))
1797 error1 = IP6_ERROR_TIME_EXPIRED;
1798 next1 = IP6_REWRITE_NEXT_ICMP_ERROR;
1799 vnet_buffer (p1)->sw_if_index[VLIB_TX] = (u32) ~ 0;
1800 icmp6_error_set_vnet_buffer (p1, ICMP6_time_exceeded,
1801 ICMP6_time_exceeded_ttl_exceeded_in_transit,
1807 p1->flags &= ~VNET_BUFFER_F_LOCALLY_ORIGINATED;
1809 adj0 = adj_get (adj_index0);
1810 adj1 = adj_get (adj_index1);
1812 rw_len0 = adj0[0].rewrite_header.data_bytes;
1813 rw_len1 = adj1[0].rewrite_header.data_bytes;
1814 vnet_buffer (p0)->ip.save_rewrite_length = rw_len0;
1815 vnet_buffer (p1)->ip.save_rewrite_length = rw_len1;
1819 vlib_increment_combined_counter
1820 (&adjacency_counters,
1821 thread_index, adj_index0, 1,
1822 vlib_buffer_length_in_chain (vm, p0) + rw_len0);
1823 vlib_increment_combined_counter
1824 (&adjacency_counters,
1825 thread_index, adj_index1, 1,
1826 vlib_buffer_length_in_chain (vm, p1) + rw_len1);
1829 /* Check MTU of outgoing interface. */
1831 clib_net_to_host_u16 (ip0->payload_length) +
1832 sizeof (ip6_header_t);
1834 clib_net_to_host_u16 (ip1->payload_length) +
1835 sizeof (ip6_header_t);
1836 if (do_gso && (p0->flags & VNET_BUFFER_F_GSO))
1837 ip0_len = gso_mtu_sz (p0);
1838 if (do_gso && (p1->flags & VNET_BUFFER_F_GSO))
1839 ip1_len = gso_mtu_sz (p1);
1843 ip6_mtu_check (p0, ip0_len,
1844 adj0[0].rewrite_header.max_l3_packet_bytes,
1845 is_locally_originated0, &next0, is_midchain,
1847 ip6_mtu_check (p1, ip1_len,
1848 adj1[0].rewrite_header.max_l3_packet_bytes,
1849 is_locally_originated1, &next1, is_midchain,
1852 /* Don't adjust the buffer for hop count issue; icmp-error node
1853 * wants to see the IP header */
1854 if (PREDICT_TRUE (error0 == IP6_ERROR_NONE))
1856 p0->current_data -= rw_len0;
1857 p0->current_length += rw_len0;
1859 tx_sw_if_index0 = adj0[0].rewrite_header.sw_if_index;
1860 vnet_buffer (p0)->sw_if_index[VLIB_TX] = tx_sw_if_index0;
1861 next0 = adj0[0].rewrite_header.next_index;
1864 (adj0[0].rewrite_header.flags & VNET_REWRITE_HAS_FEATURES))
1865 vnet_feature_arc_start (lm->output_feature_arc_index,
1866 tx_sw_if_index0, &next0, p0);
1870 p0->error = error_node->errors[error0];
1872 if (PREDICT_TRUE (error1 == IP6_ERROR_NONE))
1874 p1->current_data -= rw_len1;
1875 p1->current_length += rw_len1;
1877 tx_sw_if_index1 = adj1[0].rewrite_header.sw_if_index;
1878 vnet_buffer (p1)->sw_if_index[VLIB_TX] = tx_sw_if_index1;
1879 next1 = adj1[0].rewrite_header.next_index;
1882 (adj1[0].rewrite_header.flags & VNET_REWRITE_HAS_FEATURES))
1883 vnet_feature_arc_start (lm->output_feature_arc_index,
1884 tx_sw_if_index1, &next1, p1);
1888 p1->error = error_node->errors[error1];
1893 /* before we paint on the next header, update the L4
1894 * checksums if required, since there's no offload on a tunnel */
1895 calc_checksums (vm, p0);
1896 calc_checksums (vm, p1);
1899 /* Guess we are only writing on simple Ethernet header. */
1900 vnet_rewrite_two_headers (adj0[0], adj1[0],
1901 ip0, ip1, sizeof (ethernet_header_t));
1905 if (adj0->sub_type.midchain.fixup_func)
1906 adj0->sub_type.midchain.fixup_func
1907 (vm, adj0, p0, adj0->sub_type.midchain.fixup_data);
1908 if (adj1->sub_type.midchain.fixup_func)
1909 adj1->sub_type.midchain.fixup_func
1910 (vm, adj1, p1, adj1->sub_type.midchain.fixup_data);
1915 * copy bytes from the IP address into the MAC rewrite
1917 vnet_ip_mcast_fixup_header (IP6_MCAST_ADDR_MASK,
1919 rewrite_header.dst_mcast_offset,
1920 &ip0->dst_address.as_u32[3],
1922 vnet_ip_mcast_fixup_header (IP6_MCAST_ADDR_MASK,
1924 rewrite_header.dst_mcast_offset,
1925 &ip1->dst_address.as_u32[3],
1929 vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
1930 to_next, n_left_to_next,
1931 pi0, pi1, next0, next1);
1934 while (n_left_from > 0 && n_left_to_next > 0)
1936 ip_adjacency_t *adj0;
1940 u32 adj_index0, next0, error0;
1941 u32 tx_sw_if_index0;
1942 bool is_locally_originated0;
1944 pi0 = to_next[0] = from[0];
1946 p0 = vlib_get_buffer (vm, pi0);
1948 adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
1950 adj0 = adj_get (adj_index0);
1952 ip0 = vlib_buffer_get_current (p0);
1954 error0 = IP6_ERROR_NONE;
1955 next0 = IP6_REWRITE_NEXT_DROP;
1957 /* Check hop limit */
1958 is_locally_originated0 =
1959 p0->flags & VNET_BUFFER_F_LOCALLY_ORIGINATED;
1960 if (PREDICT_TRUE (!is_locally_originated0))
1962 i32 hop_limit0 = ip0->hop_limit;
1964 ASSERT (ip0->hop_limit > 0);
1968 ip0->hop_limit = hop_limit0;
1970 if (PREDICT_FALSE (hop_limit0 <= 0))
1973 * If the hop count drops below 1 when forwarding, generate
1976 error0 = IP6_ERROR_TIME_EXPIRED;
1977 next0 = IP6_REWRITE_NEXT_ICMP_ERROR;
1978 vnet_buffer (p0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
1979 icmp6_error_set_vnet_buffer (p0, ICMP6_time_exceeded,
1980 ICMP6_time_exceeded_ttl_exceeded_in_transit,
1986 p0->flags &= ~VNET_BUFFER_F_LOCALLY_ORIGINATED;
1991 calc_checksums (vm, p0);
1994 /* Guess we are only writing on simple Ethernet header. */
1995 vnet_rewrite_one_header (adj0[0], ip0, sizeof (ethernet_header_t));
1997 /* Update packet buffer attributes/set output interface. */
1998 rw_len0 = adj0[0].rewrite_header.data_bytes;
1999 vnet_buffer (p0)->ip.save_rewrite_length = rw_len0;
2003 vlib_increment_combined_counter
2004 (&adjacency_counters,
2005 thread_index, adj_index0, 1,
2006 vlib_buffer_length_in_chain (vm, p0) + rw_len0);
2009 /* Check MTU of outgoing interface. */
2011 clib_net_to_host_u16 (ip0->payload_length) +
2012 sizeof (ip6_header_t);
2013 if (do_gso && (p0->flags & VNET_BUFFER_F_GSO))
2014 ip0_len = gso_mtu_sz (p0);
2016 ip6_mtu_check (p0, ip0_len,
2017 adj0[0].rewrite_header.max_l3_packet_bytes,
2018 is_locally_originated0, &next0, is_midchain,
2021 /* Don't adjust the buffer for hop count issue; icmp-error node
2022 * wants to see the IP header */
2023 if (PREDICT_TRUE (error0 == IP6_ERROR_NONE))
2025 p0->current_data -= rw_len0;
2026 p0->current_length += rw_len0;
2028 tx_sw_if_index0 = adj0[0].rewrite_header.sw_if_index;
2030 vnet_buffer (p0)->sw_if_index[VLIB_TX] = tx_sw_if_index0;
2031 next0 = adj0[0].rewrite_header.next_index;
2034 (adj0[0].rewrite_header.flags & VNET_REWRITE_HAS_FEATURES))
2035 vnet_feature_arc_start (lm->output_feature_arc_index,
2036 tx_sw_if_index0, &next0, p0);
2040 p0->error = error_node->errors[error0];
2045 if (adj0->sub_type.midchain.fixup_func)
2046 adj0->sub_type.midchain.fixup_func
2047 (vm, adj0, p0, adj0->sub_type.midchain.fixup_data);
2051 vnet_ip_mcast_fixup_header (IP6_MCAST_ADDR_MASK,
2053 rewrite_header.dst_mcast_offset,
2054 &ip0->dst_address.as_u32[3],
2061 n_left_to_next -= 1;
2063 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
2064 to_next, n_left_to_next,
2068 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2071 /* Need to do trace after rewrites to pick up new packet data. */
2072 if (node->flags & VLIB_NODE_FLAG_TRACE)
2073 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
2075 return frame->n_vectors;
2079 ip6_rewrite_inline (vlib_main_t * vm,
2080 vlib_node_runtime_t * node,
2081 vlib_frame_t * frame,
2082 int do_counters, int is_midchain, int is_mcast)
2084 vnet_main_t *vnm = vnet_get_main ();
2085 if (PREDICT_FALSE (vnm->interface_main.gso_interface_count > 0))
2086 return ip6_rewrite_inline_with_gso (vm, node, frame, do_counters,
2087 is_midchain, is_mcast,
2090 return ip6_rewrite_inline_with_gso (vm, node, frame, do_counters,
2091 is_midchain, is_mcast,
2092 0 /* no do_gso */ );
2095 VLIB_NODE_FN (ip6_rewrite_node) (vlib_main_t * vm,
2096 vlib_node_runtime_t * node,
2097 vlib_frame_t * frame)
2099 if (adj_are_counters_enabled ())
2100 return ip6_rewrite_inline (vm, node, frame, 1, 0, 0);
2102 return ip6_rewrite_inline (vm, node, frame, 0, 0, 0);
2105 VLIB_NODE_FN (ip6_rewrite_bcast_node) (vlib_main_t * vm,
2106 vlib_node_runtime_t * node,
2107 vlib_frame_t * frame)
2109 if (adj_are_counters_enabled ())
2110 return ip6_rewrite_inline (vm, node, frame, 1, 0, 0);
2112 return ip6_rewrite_inline (vm, node, frame, 0, 0, 0);
2115 VLIB_NODE_FN (ip6_rewrite_mcast_node) (vlib_main_t * vm,
2116 vlib_node_runtime_t * node,
2117 vlib_frame_t * frame)
2119 if (adj_are_counters_enabled ())
2120 return ip6_rewrite_inline (vm, node, frame, 1, 0, 1);
2122 return ip6_rewrite_inline (vm, node, frame, 0, 0, 1);
2125 VLIB_NODE_FN (ip6_midchain_node) (vlib_main_t * vm,
2126 vlib_node_runtime_t * node,
2127 vlib_frame_t * frame)
2129 if (adj_are_counters_enabled ())
2130 return ip6_rewrite_inline (vm, node, frame, 1, 1, 0);
2132 return ip6_rewrite_inline (vm, node, frame, 0, 1, 0);
2135 VLIB_NODE_FN (ip6_mcast_midchain_node) (vlib_main_t * vm,
2136 vlib_node_runtime_t * node,
2137 vlib_frame_t * frame)
2139 if (adj_are_counters_enabled ())
2140 return ip6_rewrite_inline (vm, node, frame, 1, 1, 1);
2142 return ip6_rewrite_inline (vm, node, frame, 0, 1, 1);
2146 VLIB_REGISTER_NODE (ip6_midchain_node) =
2148 .name = "ip6-midchain",
2149 .vector_size = sizeof (u32),
2150 .format_trace = format_ip6_forward_next_trace,
2151 .sibling_of = "ip6-rewrite",
2154 VLIB_REGISTER_NODE (ip6_rewrite_node) =
2156 .name = "ip6-rewrite",
2157 .vector_size = sizeof (u32),
2158 .format_trace = format_ip6_rewrite_trace,
2159 .n_next_nodes = IP6_REWRITE_N_NEXT,
2162 [IP6_REWRITE_NEXT_DROP] = "ip6-drop",
2163 [IP6_REWRITE_NEXT_ICMP_ERROR] = "ip6-icmp-error",
2164 [IP6_REWRITE_NEXT_FRAGMENT] = "ip6-frag",
2168 VLIB_REGISTER_NODE (ip6_rewrite_bcast_node) = {
2169 .name = "ip6-rewrite-bcast",
2170 .vector_size = sizeof (u32),
2172 .format_trace = format_ip6_rewrite_trace,
2173 .sibling_of = "ip6-rewrite",
2176 VLIB_REGISTER_NODE (ip6_rewrite_mcast_node) =
2178 .name = "ip6-rewrite-mcast",
2179 .vector_size = sizeof (u32),
2180 .format_trace = format_ip6_rewrite_trace,
2181 .sibling_of = "ip6-rewrite",
2185 VLIB_REGISTER_NODE (ip6_mcast_midchain_node) =
2187 .name = "ip6-mcast-midchain",
2188 .vector_size = sizeof (u32),
2189 .format_trace = format_ip6_rewrite_trace,
2190 .sibling_of = "ip6-rewrite",
2196 * Hop-by-Hop handling
2198 #ifndef CLIB_MARCH_VARIANT
2199 ip6_hop_by_hop_main_t ip6_hop_by_hop_main;
2200 #endif /* CLIB_MARCH_VARIANT */
2202 #define foreach_ip6_hop_by_hop_error \
2203 _(PROCESSED, "pkts with ip6 hop-by-hop options") \
2204 _(FORMAT, "incorrectly formatted hop-by-hop options") \
2205 _(UNKNOWN_OPTION, "unknown ip6 hop-by-hop options")
2210 #define _(sym,str) IP6_HOP_BY_HOP_ERROR_##sym,
2211 foreach_ip6_hop_by_hop_error
2213 IP6_HOP_BY_HOP_N_ERROR,
2214 } ip6_hop_by_hop_error_t;
2218 * Primary h-b-h handler trace support
2219 * We work pretty hard on the problem for obvious reasons
2225 u8 option_data[256];
2226 } ip6_hop_by_hop_trace_t;
2228 extern vlib_node_registration_t ip6_hop_by_hop_node;
2230 static char *ip6_hop_by_hop_error_strings[] = {
2231 #define _(sym,string) string,
2232 foreach_ip6_hop_by_hop_error
2236 #ifndef CLIB_MARCH_VARIANT
2238 format_ip6_hop_by_hop_ext_hdr (u8 * s, va_list * args)
2240 ip6_hop_by_hop_header_t *hbh0 = va_arg (*args, ip6_hop_by_hop_header_t *);
2241 int total_len = va_arg (*args, int);
2242 ip6_hop_by_hop_option_t *opt0, *limit0;
2243 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2246 s = format (s, "IP6_HOP_BY_HOP: next protocol %d len %d total %d",
2247 hbh0->protocol, (hbh0->length + 1) << 3, total_len);
2249 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2250 limit0 = (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 + total_len);
2252 while (opt0 < limit0)
2257 case 0: /* Pad, just stop */
2258 opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0 + 1);
2262 if (hm->trace[type0])
2264 s = (*hm->trace[type0]) (s, opt0);
2269 format (s, "\n unrecognized option %d length %d", type0,
2273 (ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length +
2274 sizeof (ip6_hop_by_hop_option_t));
2283 format_ip6_hop_by_hop_trace (u8 * s, va_list * args)
2285 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
2286 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
2287 ip6_hop_by_hop_trace_t *t = va_arg (*args, ip6_hop_by_hop_trace_t *);
2288 ip6_hop_by_hop_header_t *hbh0;
2289 ip6_hop_by_hop_option_t *opt0, *limit0;
2290 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2294 hbh0 = (ip6_hop_by_hop_header_t *) t->option_data;
2296 s = format (s, "IP6_HOP_BY_HOP: next index %d len %d traced %d",
2297 t->next_index, (hbh0->length + 1) << 3, t->trace_len);
2299 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2300 limit0 = (ip6_hop_by_hop_option_t *) ((u8 *) hbh0) + t->trace_len;
2302 while (opt0 < limit0)
2307 case 0: /* Pad, just stop */
2308 opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0) + 1;
2312 if (hm->trace[type0])
2314 s = (*hm->trace[type0]) (s, opt0);
2319 format (s, "\n unrecognized option %d length %d", type0,
2323 (ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length +
2324 sizeof (ip6_hop_by_hop_option_t));
2332 ip6_scan_hbh_options (vlib_buffer_t * b0,
2334 ip6_hop_by_hop_header_t * hbh0,
2335 ip6_hop_by_hop_option_t * opt0,
2336 ip6_hop_by_hop_option_t * limit0, u32 * next0)
2338 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2342 while (opt0 < limit0)
2348 opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0) + 1;
2353 if (hm->options[type0])
2355 if ((*hm->options[type0]) (b0, ip0, opt0) < 0)
2357 error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2363 /* Unrecognized mandatory option, check the two high order bits */
2364 switch (opt0->type & HBH_OPTION_TYPE_HIGH_ORDER_BITS)
2366 case HBH_OPTION_TYPE_SKIP_UNKNOWN:
2368 case HBH_OPTION_TYPE_DISCARD_UNKNOWN:
2369 error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2370 *next0 = IP_LOOKUP_NEXT_DROP;
2372 case HBH_OPTION_TYPE_DISCARD_UNKNOWN_ICMP:
2373 error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2374 *next0 = IP_LOOKUP_NEXT_ICMP_ERROR;
2375 icmp6_error_set_vnet_buffer (b0, ICMP6_parameter_problem,
2376 ICMP6_parameter_problem_unrecognized_option,
2377 (u8 *) opt0 - (u8 *) ip0);
2379 case HBH_OPTION_TYPE_DISCARD_UNKNOWN_ICMP_NOT_MCAST:
2380 error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2381 if (!ip6_address_is_multicast (&ip0->dst_address))
2383 *next0 = IP_LOOKUP_NEXT_ICMP_ERROR;
2384 icmp6_error_set_vnet_buffer (b0,
2385 ICMP6_parameter_problem,
2386 ICMP6_parameter_problem_unrecognized_option,
2387 (u8 *) opt0 - (u8 *) ip0);
2391 *next0 = IP_LOOKUP_NEXT_DROP;
2399 (ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length +
2400 sizeof (ip6_hop_by_hop_option_t));
2406 * Process the Hop-by-Hop Options header
2408 VLIB_NODE_FN (ip6_hop_by_hop_node) (vlib_main_t * vm,
2409 vlib_node_runtime_t * node,
2410 vlib_frame_t * frame)
2412 vlib_node_runtime_t *error_node =
2413 vlib_node_get_runtime (vm, ip6_hop_by_hop_node.index);
2414 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2415 u32 n_left_from, *from, *to_next;
2416 ip_lookup_next_t next_index;
2418 from = vlib_frame_vector_args (frame);
2419 n_left_from = frame->n_vectors;
2420 next_index = node->cached_next_index;
2422 while (n_left_from > 0)
2426 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
2428 while (n_left_from >= 4 && n_left_to_next >= 2)
2431 vlib_buffer_t *b0, *b1;
2433 ip6_header_t *ip0, *ip1;
2434 ip6_hop_by_hop_header_t *hbh0, *hbh1;
2435 ip6_hop_by_hop_option_t *opt0, *limit0, *opt1, *limit1;
2436 u8 error0 = 0, error1 = 0;
2438 /* Prefetch next iteration. */
2440 vlib_buffer_t *p2, *p3;
2442 p2 = vlib_get_buffer (vm, from[2]);
2443 p3 = vlib_get_buffer (vm, from[3]);
2445 vlib_prefetch_buffer_header (p2, LOAD);
2446 vlib_prefetch_buffer_header (p3, LOAD);
2448 CLIB_PREFETCH (p2->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
2449 CLIB_PREFETCH (p3->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
2452 /* Speculatively enqueue b0, b1 to the current next frame */
2453 to_next[0] = bi0 = from[0];
2454 to_next[1] = bi1 = from[1];
2458 n_left_to_next -= 2;
2460 b0 = vlib_get_buffer (vm, bi0);
2461 b1 = vlib_get_buffer (vm, bi1);
2463 /* Default use the next_index from the adjacency. A HBH option rarely redirects to a different node */
2464 u32 adj_index0 = vnet_buffer (b0)->ip.adj_index[VLIB_TX];
2465 ip_adjacency_t *adj0 = adj_get (adj_index0);
2466 u32 adj_index1 = vnet_buffer (b1)->ip.adj_index[VLIB_TX];
2467 ip_adjacency_t *adj1 = adj_get (adj_index1);
2469 /* Default use the next_index from the adjacency. A HBH option rarely redirects to a different node */
2470 next0 = adj0->lookup_next_index;
2471 next1 = adj1->lookup_next_index;
2473 ip0 = vlib_buffer_get_current (b0);
2474 ip1 = vlib_buffer_get_current (b1);
2475 hbh0 = (ip6_hop_by_hop_header_t *) (ip0 + 1);
2476 hbh1 = (ip6_hop_by_hop_header_t *) (ip1 + 1);
2477 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2478 opt1 = (ip6_hop_by_hop_option_t *) (hbh1 + 1);
2480 (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 +
2481 ((hbh0->length + 1) << 3));
2483 (ip6_hop_by_hop_option_t *) ((u8 *) hbh1 +
2484 ((hbh1->length + 1) << 3));
2487 * Basic validity checks
2489 if ((hbh0->length + 1) << 3 >
2490 clib_net_to_host_u16 (ip0->payload_length))
2492 error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2493 next0 = IP_LOOKUP_NEXT_DROP;
2496 /* Scan the set of h-b-h options, process ones that we understand */
2497 error0 = ip6_scan_hbh_options (b0, ip0, hbh0, opt0, limit0, &next0);
2499 if ((hbh1->length + 1) << 3 >
2500 clib_net_to_host_u16 (ip1->payload_length))
2502 error1 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2503 next1 = IP_LOOKUP_NEXT_DROP;
2506 /* Scan the set of h-b-h options, process ones that we understand */
2507 error1 = ip6_scan_hbh_options (b1, ip1, hbh1, opt1, limit1, &next1);
2510 /* Has the classifier flagged this buffer for special treatment? */
2513 && (vnet_buffer (b0)->l2_classify.opaque_index & OI_DECAP)))
2514 next0 = hm->next_override;
2516 /* Has the classifier flagged this buffer for special treatment? */
2519 && (vnet_buffer (b1)->l2_classify.opaque_index & OI_DECAP)))
2520 next1 = hm->next_override;
2522 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)))
2524 if (b0->flags & VLIB_BUFFER_IS_TRACED)
2526 ip6_hop_by_hop_trace_t *t =
2527 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 */
2533 ARRAY_LEN (t->option_data) ? trace_len :
2534 ARRAY_LEN (t->option_data);
2535 t->trace_len = trace_len;
2536 clib_memcpy_fast (t->option_data, hbh0, trace_len);
2538 if (b1->flags & VLIB_BUFFER_IS_TRACED)
2540 ip6_hop_by_hop_trace_t *t =
2541 vlib_add_trace (vm, node, b1, sizeof (*t));
2542 u32 trace_len = (hbh1->length + 1) << 3;
2543 t->next_index = next1;
2544 /* Capture the h-b-h option verbatim */
2547 ARRAY_LEN (t->option_data) ? trace_len :
2548 ARRAY_LEN (t->option_data);
2549 t->trace_len = trace_len;
2550 clib_memcpy_fast (t->option_data, hbh1, trace_len);
2555 b0->error = error_node->errors[error0];
2556 b1->error = error_node->errors[error1];
2558 /* verify speculative enqueue, maybe switch current next frame */
2559 vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
2560 n_left_to_next, bi0, bi1, next0,
2564 while (n_left_from > 0 && n_left_to_next > 0)
2570 ip6_hop_by_hop_header_t *hbh0;
2571 ip6_hop_by_hop_option_t *opt0, *limit0;
2574 /* Speculatively enqueue b0 to the current next frame */
2580 n_left_to_next -= 1;
2582 b0 = vlib_get_buffer (vm, bi0);
2584 * Default use the next_index from the adjacency.
2585 * A HBH option rarely redirects to a different node
2587 u32 adj_index0 = vnet_buffer (b0)->ip.adj_index[VLIB_TX];
2588 ip_adjacency_t *adj0 = adj_get (adj_index0);
2589 next0 = adj0->lookup_next_index;
2591 ip0 = vlib_buffer_get_current (b0);
2592 hbh0 = (ip6_hop_by_hop_header_t *) (ip0 + 1);
2593 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2595 (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 +
2596 ((hbh0->length + 1) << 3));
2599 * Basic validity checks
2601 if ((hbh0->length + 1) << 3 >
2602 clib_net_to_host_u16 (ip0->payload_length))
2604 error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2605 next0 = IP_LOOKUP_NEXT_DROP;
2609 /* Scan the set of h-b-h options, process ones that we understand */
2610 error0 = ip6_scan_hbh_options (b0, ip0, hbh0, opt0, limit0, &next0);
2613 /* Has the classifier flagged this buffer for special treatment? */
2616 && (vnet_buffer (b0)->l2_classify.opaque_index & OI_DECAP)))
2617 next0 = hm->next_override;
2619 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
2621 ip6_hop_by_hop_trace_t *t =
2622 vlib_add_trace (vm, node, b0, sizeof (*t));
2623 u32 trace_len = (hbh0->length + 1) << 3;
2624 t->next_index = next0;
2625 /* Capture the h-b-h option verbatim */
2628 ARRAY_LEN (t->option_data) ? trace_len :
2629 ARRAY_LEN (t->option_data);
2630 t->trace_len = trace_len;
2631 clib_memcpy_fast (t->option_data, hbh0, trace_len);
2634 b0->error = error_node->errors[error0];
2636 /* verify speculative enqueue, maybe switch current next frame */
2637 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
2638 n_left_to_next, bi0, next0);
2640 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2642 return frame->n_vectors;
2646 VLIB_REGISTER_NODE (ip6_hop_by_hop_node) =
2648 .name = "ip6-hop-by-hop",
2649 .sibling_of = "ip6-lookup",
2650 .vector_size = sizeof (u32),
2651 .format_trace = format_ip6_hop_by_hop_trace,
2652 .type = VLIB_NODE_TYPE_INTERNAL,
2653 .n_errors = ARRAY_LEN (ip6_hop_by_hop_error_strings),
2654 .error_strings = ip6_hop_by_hop_error_strings,
2659 static clib_error_t *
2660 ip6_hop_by_hop_init (vlib_main_t * vm)
2662 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2663 clib_memset (hm->options, 0, sizeof (hm->options));
2664 clib_memset (hm->trace, 0, sizeof (hm->trace));
2665 hm->next_override = IP6_LOOKUP_NEXT_POP_HOP_BY_HOP;
2669 VLIB_INIT_FUNCTION (ip6_hop_by_hop_init);
2671 #ifndef CLIB_MARCH_VARIANT
2673 ip6_hbh_set_next_override (uword next)
2675 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2677 hm->next_override = next;
2681 ip6_hbh_register_option (u8 option,
2682 int options (vlib_buffer_t * b, ip6_header_t * ip,
2683 ip6_hop_by_hop_option_t * opt),
2684 u8 * trace (u8 * s, ip6_hop_by_hop_option_t * opt))
2686 ip6_main_t *im = &ip6_main;
2687 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2689 ASSERT ((u32) option < ARRAY_LEN (hm->options));
2691 /* Already registered */
2692 if (hm->options[option])
2695 hm->options[option] = options;
2696 hm->trace[option] = trace;
2698 /* Set global variable */
2699 im->hbh_enabled = 1;
2705 ip6_hbh_unregister_option (u8 option)
2707 ip6_main_t *im = &ip6_main;
2708 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2710 ASSERT ((u32) option < ARRAY_LEN (hm->options));
2712 /* Not registered */
2713 if (!hm->options[option])
2716 hm->options[option] = NULL;
2717 hm->trace[option] = NULL;
2719 /* Disable global knob if this was the last option configured */
2722 for (i = 0; i < 256; i++)
2724 if (hm->options[option])
2731 im->hbh_enabled = 0;
2736 /* Global IP6 main. */
2737 ip6_main_t ip6_main;
2740 static clib_error_t *
2741 ip6_lookup_init (vlib_main_t * vm)
2743 ip6_main_t *im = &ip6_main;
2744 clib_error_t *error;
2747 if ((error = vlib_call_init_function (vm, vnet_feature_init)))
2750 for (i = 0; i < ARRAY_LEN (im->fib_masks); i++)
2757 for (j = 0; j < i0; j++)
2758 im->fib_masks[i].as_u32[j] = ~0;
2761 im->fib_masks[i].as_u32[i0] =
2762 clib_host_to_net_u32 (pow2_mask (i1) << (32 - i1));
2765 ip_lookup_init (&im->lookup_main, /* is_ip6 */ 1);
2767 if (im->lookup_table_nbuckets == 0)
2768 im->lookup_table_nbuckets = IP6_FIB_DEFAULT_HASH_NUM_BUCKETS;
2770 im->lookup_table_nbuckets = 1 << max_log2 (im->lookup_table_nbuckets);
2772 if (im->lookup_table_size == 0)
2773 im->lookup_table_size = IP6_FIB_DEFAULT_HASH_MEMORY_SIZE;
2775 clib_bihash_init_24_8 (&(im->ip6_table[IP6_FIB_TABLE_FWDING].ip6_hash),
2776 "ip6 FIB fwding table",
2777 im->lookup_table_nbuckets, im->lookup_table_size);
2778 clib_bihash_init_24_8 (&im->ip6_table[IP6_FIB_TABLE_NON_FWDING].ip6_hash,
2779 "ip6 FIB non-fwding table",
2780 im->lookup_table_nbuckets, im->lookup_table_size);
2781 clib_bihash_init_40_8 (&im->ip6_mtable.ip6_mhash,
2783 im->lookup_table_nbuckets, im->lookup_table_size);
2785 /* Create FIB with index 0 and table id of 0. */
2786 fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6, 0,
2787 FIB_SOURCE_DEFAULT_ROUTE);
2788 mfib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6, 0,
2789 MFIB_SOURCE_DEFAULT_ROUTE);
2793 pn = pg_get_node (ip6_lookup_node.index);
2794 pn->unformat_edit = unformat_pg_ip6_header;
2797 /* Unless explicitly configured, don't process HBH options */
2798 im->hbh_enabled = 0;
2801 icmp6_neighbor_solicitation_header_t p;
2803 clib_memset (&p, 0, sizeof (p));
2805 p.ip.ip_version_traffic_class_and_flow_label =
2806 clib_host_to_net_u32 (0x6 << 28);
2807 p.ip.payload_length =
2808 clib_host_to_net_u16 (sizeof (p) -
2810 (icmp6_neighbor_solicitation_header_t, neighbor));
2811 p.ip.protocol = IP_PROTOCOL_ICMP6;
2812 p.ip.hop_limit = 255;
2813 ip6_set_solicited_node_multicast_address (&p.ip.dst_address, 0);
2815 p.neighbor.icmp.type = ICMP6_neighbor_solicitation;
2817 p.link_layer_option.header.type =
2818 ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address;
2819 p.link_layer_option.header.n_data_u64s =
2820 sizeof (p.link_layer_option) / sizeof (u64);
2822 vlib_packet_template_init (vm,
2823 &im->discover_neighbor_packet_template,
2825 /* alloc chunk size */ 8,
2826 "ip6 neighbor discovery");
2832 VLIB_INIT_FUNCTION (ip6_lookup_init);
2834 static clib_error_t *
2835 test_ip6_link_command_fn (vlib_main_t * vm,
2836 unformat_input_t * input, vlib_cli_command_t * cmd)
2839 ip6_address_t _a, *a = &_a;
2841 if (unformat (input, "%U", unformat_ethernet_address, mac))
2843 ip6_link_local_address_from_ethernet_mac_address (a, mac);
2844 vlib_cli_output (vm, "Link local address: %U", format_ip6_address, a);
2845 ip6_ethernet_mac_address_from_link_local_address (mac, a);
2846 vlib_cli_output (vm, "Original MAC address: %U",
2847 format_ethernet_address, mac);
2854 * This command converts the given MAC Address into an IPv6 link-local
2858 * Example of how to create an IPv6 link-local address:
2859 * @cliexstart{test ip6 link 16:d9:e0:91:79:86}
2860 * Link local address: fe80::14d9:e0ff:fe91:7986
2861 * Original MAC address: 16:d9:e0:91:79:86
2865 VLIB_CLI_COMMAND (test_link_command, static) =
2867 .path = "test ip6 link",
2868 .function = test_ip6_link_command_fn,
2869 .short_help = "test ip6 link <mac-address>",
2873 #ifndef CLIB_MARCH_VARIANT
2875 vnet_set_ip6_flow_hash (u32 table_id, u32 flow_hash_config)
2879 fib_index = fib_table_find (FIB_PROTOCOL_IP6, table_id);
2881 if (~0 == fib_index)
2882 return VNET_API_ERROR_NO_SUCH_FIB;
2884 fib_table_set_flow_hash_config (fib_index, FIB_PROTOCOL_IP6,
2891 static clib_error_t *
2892 set_ip6_flow_hash_command_fn (vlib_main_t * vm,
2893 unformat_input_t * input,
2894 vlib_cli_command_t * cmd)
2898 u32 flow_hash_config = 0;
2901 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
2903 if (unformat (input, "table %d", &table_id))
2906 else if (unformat (input, #a)) { flow_hash_config |= v; matched=1;}
2907 foreach_flow_hash_bit
2914 return clib_error_return (0, "unknown input `%U'",
2915 format_unformat_error, input);
2917 rv = vnet_set_ip6_flow_hash (table_id, flow_hash_config);
2924 return clib_error_return (0, "no such FIB table %d", table_id);
2927 clib_warning ("BUG: illegal flow hash config 0x%x", flow_hash_config);
2935 * Configure the set of IPv6 fields used by the flow hash.
2939 * Example of how to set the flow hash on a given table:
2940 * @cliexcmd{set ip6 flow-hash table 8 dst sport dport proto}
2942 * Example of display the configured flow hash:
2943 * @cliexstart{show ip6 fib}
2944 * ipv6-VRF:0, fib_index 0, flow hash: src dst sport dport proto
2947 * [@0]: dpo-load-balance: [index:5 buckets:1 uRPF:5 to:[0:0]]
2948 * [0] [@0]: dpo-drop ip6
2951 * [@0]: dpo-load-balance: [index:10 buckets:1 uRPF:10 to:[0:0]]
2952 * [0] [@2]: dpo-receive
2955 * [@0]: dpo-load-balance: [index:8 buckets:1 uRPF:8 to:[0:0]]
2956 * [0] [@2]: dpo-receive
2959 * [@0]: dpo-load-balance: [index:7 buckets:1 uRPF:7 to:[0:0]]
2960 * [0] [@2]: dpo-receive
2963 * [@0]: dpo-load-balance: [index:9 buckets:1 uRPF:9 to:[0:0]]
2964 * [0] [@2]: dpo-receive
2965 * ff02::1:ff00:0/104
2967 * [@0]: dpo-load-balance: [index:6 buckets:1 uRPF:6 to:[0:0]]
2968 * [0] [@2]: dpo-receive
2969 * ipv6-VRF:8, fib_index 1, flow hash: dst sport dport proto
2972 * [@0]: dpo-load-balance: [index:21 buckets:1 uRPF:20 to:[0:0]]
2973 * [0] [@0]: dpo-drop ip6
2976 * [@0]: dpo-load-balance: [index:27 buckets:1 uRPF:26 to:[0:0]]
2977 * [0] [@4]: ipv6-glean: af_packet0
2980 * [@0]: dpo-load-balance: [index:28 buckets:1 uRPF:27 to:[0:0]]
2981 * [0] [@2]: dpo-receive: @::a:1:1:0:7 on af_packet0
2984 * [@0]: dpo-load-balance: [index:26 buckets:1 uRPF:25 to:[0:0]]
2985 * [0] [@2]: dpo-receive
2986 * fe80::fe:3eff:fe3e:9222/128
2988 * [@0]: dpo-load-balance: [index:29 buckets:1 uRPF:28 to:[0:0]]
2989 * [0] [@2]: dpo-receive: fe80::fe:3eff:fe3e:9222 on af_packet0
2992 * [@0]: dpo-load-balance: [index:24 buckets:1 uRPF:23 to:[0:0]]
2993 * [0] [@2]: dpo-receive
2996 * [@0]: dpo-load-balance: [index:23 buckets:1 uRPF:22 to:[0:0]]
2997 * [0] [@2]: dpo-receive
3000 * [@0]: dpo-load-balance: [index:25 buckets:1 uRPF:24 to:[0:0]]
3001 * [0] [@2]: dpo-receive
3002 * ff02::1:ff00:0/104
3004 * [@0]: dpo-load-balance: [index:22 buckets:1 uRPF:21 to:[0:0]]
3005 * [0] [@2]: dpo-receive
3010 VLIB_CLI_COMMAND (set_ip6_flow_hash_command, static) =
3012 .path = "set ip6 flow-hash",
3014 "set ip6 flow-hash table <table-id> [src] [dst] [sport] [dport] [proto] [reverse]",
3015 .function = set_ip6_flow_hash_command_fn,
3019 static clib_error_t *
3020 show_ip6_local_command_fn (vlib_main_t * vm,
3021 unformat_input_t * input, vlib_cli_command_t * cmd)
3023 ip6_main_t *im = &ip6_main;
3024 ip_lookup_main_t *lm = &im->lookup_main;
3027 vlib_cli_output (vm, "Protocols handled by ip6_local");
3028 for (i = 0; i < ARRAY_LEN (lm->local_next_by_ip_protocol); i++)
3030 if (lm->local_next_by_ip_protocol[i] != IP_LOCAL_NEXT_PUNT)
3033 u32 node_index = vlib_get_node (vm,
3034 ip6_local_node.index)->
3035 next_nodes[lm->local_next_by_ip_protocol[i]];
3036 vlib_cli_output (vm, "%d: %U", i, format_vlib_node_name, vm,
3046 * Display the set of protocols handled by the local IPv6 stack.
3049 * Example of how to display local protocol table:
3050 * @cliexstart{show ip6 local}
3051 * Protocols handled by ip6_local
3059 VLIB_CLI_COMMAND (show_ip6_local, static) =
3061 .path = "show ip6 local",
3062 .function = show_ip6_local_command_fn,
3063 .short_help = "show ip6 local",
3067 #ifndef CLIB_MARCH_VARIANT
3069 vnet_set_ip6_classify_intfc (vlib_main_t * vm, u32 sw_if_index,
3072 vnet_main_t *vnm = vnet_get_main ();
3073 vnet_interface_main_t *im = &vnm->interface_main;
3074 ip6_main_t *ipm = &ip6_main;
3075 ip_lookup_main_t *lm = &ipm->lookup_main;
3076 vnet_classify_main_t *cm = &vnet_classify_main;
3077 ip6_address_t *if_addr;
3079 if (pool_is_free_index (im->sw_interfaces, sw_if_index))
3080 return VNET_API_ERROR_NO_MATCHING_INTERFACE;
3082 if (table_index != ~0 && pool_is_free_index (cm->tables, table_index))
3083 return VNET_API_ERROR_NO_SUCH_ENTRY;
3085 vec_validate (lm->classify_table_index_by_sw_if_index, sw_if_index);
3086 lm->classify_table_index_by_sw_if_index[sw_if_index] = table_index;
3088 if_addr = ip6_interface_first_address (ipm, sw_if_index);
3090 if (NULL != if_addr)
3092 fib_prefix_t pfx = {
3094 .fp_proto = FIB_PROTOCOL_IP6,
3095 .fp_addr.ip6 = *if_addr,
3099 fib_index = fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4,
3103 if (table_index != (u32) ~ 0)
3105 dpo_id_t dpo = DPO_INVALID;
3110 classify_dpo_create (DPO_PROTO_IP6, table_index));
3112 fib_table_entry_special_dpo_add (fib_index,
3114 FIB_SOURCE_CLASSIFY,
3115 FIB_ENTRY_FLAG_NONE, &dpo);
3120 fib_table_entry_special_remove (fib_index,
3121 &pfx, FIB_SOURCE_CLASSIFY);
3129 static clib_error_t *
3130 set_ip6_classify_command_fn (vlib_main_t * vm,
3131 unformat_input_t * input,
3132 vlib_cli_command_t * cmd)
3134 u32 table_index = ~0;
3135 int table_index_set = 0;
3136 u32 sw_if_index = ~0;
3139 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
3141 if (unformat (input, "table-index %d", &table_index))
3142 table_index_set = 1;
3143 else if (unformat (input, "intfc %U", unformat_vnet_sw_interface,
3144 vnet_get_main (), &sw_if_index))
3150 if (table_index_set == 0)
3151 return clib_error_return (0, "classify table-index must be specified");
3153 if (sw_if_index == ~0)
3154 return clib_error_return (0, "interface / subif must be specified");
3156 rv = vnet_set_ip6_classify_intfc (vm, sw_if_index, table_index);
3163 case VNET_API_ERROR_NO_MATCHING_INTERFACE:
3164 return clib_error_return (0, "No such interface");
3166 case VNET_API_ERROR_NO_SUCH_ENTRY:
3167 return clib_error_return (0, "No such classifier table");
3173 * Assign a classification table to an interface. The classification
3174 * table is created using the '<em>classify table</em>' and '<em>classify session</em>'
3175 * commands. Once the table is create, use this command to filter packets
3179 * Example of how to assign a classification table to an interface:
3180 * @cliexcmd{set ip6 classify intfc GigabitEthernet2/0/0 table-index 1}
3183 VLIB_CLI_COMMAND (set_ip6_classify_command, static) =
3185 .path = "set ip6 classify",
3187 "set ip6 classify intfc <interface> table-index <classify-idx>",
3188 .function = set_ip6_classify_command_fn,
3192 static clib_error_t *
3193 ip6_config (vlib_main_t * vm, unformat_input_t * input)
3195 ip6_main_t *im = &ip6_main;
3200 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
3202 if (unformat (input, "hash-buckets %d", &tmp))
3204 else if (unformat (input, "heap-size %U",
3205 unformat_memory_size, &heapsize))
3208 return clib_error_return (0, "unknown input '%U'",
3209 format_unformat_error, input);
3212 im->lookup_table_nbuckets = nbuckets;
3213 im->lookup_table_size = heapsize;
3218 VLIB_EARLY_CONFIG_FUNCTION (ip6_config, "ip6");
3221 * fd.io coding-style-patch-verification: ON
3224 * eval: (c-set-style "gnu")