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"),
1139 static_always_inline u8
1140 ip6_tcp_udp_icmp_bad_length (vlib_main_t * vm, vlib_buffer_t * p0)
1143 u16 payload_length_host_byte_order;
1144 u32 n_this_buffer, n_bytes_left;
1145 ip6_header_t *ip0 = vlib_buffer_get_current (p0);
1146 u32 headers_size = sizeof (ip0[0]);
1147 u8 *data_this_buffer;
1150 data_this_buffer = (u8 *) (ip0 + 1);
1152 ip6_hop_by_hop_ext_t *ext_hdr = (ip6_hop_by_hop_ext_t *) data_this_buffer;
1154 /* validate really icmp6 next */
1156 if (!(ext_hdr->next_hdr == IP_PROTOCOL_ICMP6)
1157 || (ext_hdr->next_hdr == IP_PROTOCOL_UDP))
1161 payload_length_host_byte_order = clib_net_to_host_u16 (ip0->payload_length);
1162 n_bytes_left = n_this_buffer = payload_length_host_byte_order;
1165 u32 n_ip_bytes_this_buffer =
1166 p0->current_length - (((u8 *) ip0 - p0->data) - p0->current_data);
1167 if (n_this_buffer + headers_size > n_ip_bytes_this_buffer)
1169 n_this_buffer = p0->current_length > headers_size ?
1170 n_ip_bytes_this_buffer - headers_size : 0;
1173 n_bytes_left -= n_this_buffer;
1174 n_bytes_left -= p0->total_length_not_including_first_buffer;
1176 if (n_bytes_left == 0)
1184 ip6_local_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
1185 vlib_frame_t * frame, int head_of_feature_arc)
1187 ip6_main_t *im = &ip6_main;
1188 ip_lookup_main_t *lm = &im->lookup_main;
1189 u32 *from, n_left_from;
1190 vlib_node_runtime_t *error_node =
1191 vlib_node_get_runtime (vm, ip6_input_node.index);
1192 u8 arc_index = vnet_feat_arc_ip6_local.feature_arc_index;
1193 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
1194 u16 nexts[VLIB_FRAME_SIZE], *next;
1196 from = vlib_frame_vector_args (frame);
1197 n_left_from = frame->n_vectors;
1199 if (node->flags & VLIB_NODE_FLAG_TRACE)
1200 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
1202 vlib_get_buffers (vm, from, bufs, n_left_from);
1206 while (n_left_from > 2)
1208 /* Prefetch next iteration. */
1209 if (n_left_from >= 6)
1211 vlib_prefetch_buffer_header (b[4], STORE);
1212 vlib_prefetch_buffer_header (b[5], STORE);
1213 vlib_prefetch_buffer_data (b[2], LOAD);
1214 vlib_prefetch_buffer_data (b[3], LOAD);
1218 error[0] = IP6_ERROR_UNKNOWN_PROTOCOL;
1219 error[1] = IP6_ERROR_UNKNOWN_PROTOCOL;
1221 ip6_header_t *ip[2];
1222 ip[0] = vlib_buffer_get_current (b[0]);
1223 ip[1] = vlib_buffer_get_current (b[1]);
1225 if (head_of_feature_arc)
1227 vnet_buffer (b[0])->l3_hdr_offset = b[0]->current_data;
1228 vnet_buffer (b[1])->l3_hdr_offset = b[1]->current_data;
1231 type[0] = lm->builtin_protocol_by_ip_protocol[ip[0]->protocol];
1232 type[1] = lm->builtin_protocol_by_ip_protocol[ip[1]->protocol];
1235 flags[0] = b[0]->flags;
1236 flags[1] = b[1]->flags;
1238 u32 good_l4_csum[2];
1240 flags[0] & (VNET_BUFFER_F_L4_CHECKSUM_CORRECT |
1241 VNET_BUFFER_F_OFFLOAD_TCP_CKSUM |
1242 VNET_BUFFER_F_OFFLOAD_UDP_CKSUM);
1244 flags[1] & (VNET_BUFFER_F_L4_CHECKSUM_CORRECT |
1245 VNET_BUFFER_F_OFFLOAD_TCP_CKSUM |
1246 VNET_BUFFER_F_OFFLOAD_UDP_CKSUM);
1248 u32 udp_offset[2] = { };
1251 ip6_next_proto_is_tcp_udp (b[0], ip[0], &udp_offset[0]);
1253 ip6_next_proto_is_tcp_udp (b[1], ip[1], &udp_offset[1]);
1254 i16 len_diff[2] = { 0 };
1255 if (PREDICT_TRUE (is_tcp_udp[0]))
1258 (udp_header_t *) ((u8 *) ip[0] + udp_offset[0]);
1259 good_l4_csum[0] |= type[0] == IP_BUILTIN_PROTOCOL_UDP
1260 && udp->checksum == 0;
1261 /* optimistically verify UDP length. */
1262 u16 ip_len, udp_len;
1263 ip_len = clib_net_to_host_u16 (ip[0]->payload_length);
1264 udp_len = clib_net_to_host_u16 (udp->length);
1265 len_diff[0] = ip_len - udp_len;
1267 if (PREDICT_TRUE (is_tcp_udp[1]))
1270 (udp_header_t *) ((u8 *) ip[1] + udp_offset[1]);
1271 good_l4_csum[1] |= type[1] == IP_BUILTIN_PROTOCOL_UDP
1272 && udp->checksum == 0;
1273 /* optimistically verify UDP length. */
1274 u16 ip_len, udp_len;
1275 ip_len = clib_net_to_host_u16 (ip[1]->payload_length);
1276 udp_len = clib_net_to_host_u16 (udp->length);
1277 len_diff[1] = ip_len - udp_len;
1280 good_l4_csum[0] |= type[0] == IP_BUILTIN_PROTOCOL_UNKNOWN;
1281 good_l4_csum[1] |= type[1] == IP_BUILTIN_PROTOCOL_UNKNOWN;
1283 len_diff[0] = type[0] == IP_BUILTIN_PROTOCOL_UDP ? len_diff[0] : 0;
1284 len_diff[1] = type[1] == IP_BUILTIN_PROTOCOL_UDP ? len_diff[1] : 0;
1287 need_csum[0] = type[0] != IP_BUILTIN_PROTOCOL_UNKNOWN
1289 && !(flags[0] & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED);
1290 need_csum[1] = type[1] != IP_BUILTIN_PROTOCOL_UNKNOWN
1292 && !(flags[1] & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED);
1293 if (PREDICT_FALSE (need_csum[0]))
1295 flags[0] = ip6_tcp_udp_icmp_validate_checksum (vm, b[0]);
1296 good_l4_csum[0] = flags[0] & VNET_BUFFER_F_L4_CHECKSUM_CORRECT;
1297 error[0] = IP6_ERROR_UNKNOWN_PROTOCOL;
1301 if (ip6_tcp_udp_icmp_bad_length (vm, b[0]))
1302 error[0] = IP6_ERROR_BAD_LENGTH;
1304 if (PREDICT_FALSE (need_csum[1]))
1306 flags[1] = ip6_tcp_udp_icmp_validate_checksum (vm, b[1]);
1307 good_l4_csum[1] = flags[1] & VNET_BUFFER_F_L4_CHECKSUM_CORRECT;
1308 error[1] = IP6_ERROR_UNKNOWN_PROTOCOL;
1312 if (ip6_tcp_udp_icmp_bad_length (vm, b[1]))
1313 error[1] = IP6_ERROR_BAD_LENGTH;
1317 error[0] = len_diff[0] < 0 ? IP6_ERROR_UDP_LENGTH : error[0];
1319 error[1] = len_diff[1] < 0 ? IP6_ERROR_UDP_LENGTH : error[1];
1321 STATIC_ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_UDP ==
1322 IP6_ERROR_UDP_CHECKSUM,
1323 "Wrong IP6 errors constants");
1324 STATIC_ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_ICMP ==
1325 IP6_ERROR_ICMP_CHECKSUM,
1326 "Wrong IP6 errors constants");
1329 !good_l4_csum[0] ? IP6_ERROR_UDP_CHECKSUM + type[0] : error[0];
1331 !good_l4_csum[1] ? IP6_ERROR_UDP_CHECKSUM + type[1] : error[1];
1333 /* Drop packets from unroutable hosts. */
1334 /* If this is a neighbor solicitation (ICMP), skip source RPF check */
1336 unroutable[0] = error[0] == IP6_ERROR_UNKNOWN_PROTOCOL
1337 && type[0] != IP_BUILTIN_PROTOCOL_ICMP
1338 && !ip6_address_is_link_local_unicast (&ip[0]->src_address);
1339 unroutable[1] = error[1] == IP6_ERROR_UNKNOWN_PROTOCOL
1340 && type[1] != IP_BUILTIN_PROTOCOL_ICMP
1341 && !ip6_address_is_link_local_unicast (&ip[1]->src_address);
1342 if (PREDICT_FALSE (unroutable[0]))
1345 !ip6_urpf_loose_check (im, b[0],
1346 ip[0]) ? IP6_ERROR_SRC_LOOKUP_MISS
1349 if (PREDICT_FALSE (unroutable[1]))
1352 !ip6_urpf_loose_check (im, b[1],
1353 ip[1]) ? IP6_ERROR_SRC_LOOKUP_MISS
1357 vnet_buffer (b[0])->ip.fib_index =
1358 vnet_buffer (b[0])->sw_if_index[VLIB_TX] != ~0 ?
1359 vnet_buffer (b[0])->sw_if_index[VLIB_TX] :
1360 vnet_buffer (b[0])->ip.fib_index;
1361 vnet_buffer (b[1])->ip.fib_index =
1362 vnet_buffer (b[1])->sw_if_index[VLIB_TX] != ~0 ?
1363 vnet_buffer (b[1])->sw_if_index[VLIB_TX] :
1364 vnet_buffer (b[1])->ip.fib_index;
1365 } /* head_of_feature_arc */
1367 next[0] = lm->local_next_by_ip_protocol[ip[0]->protocol];
1369 error[0] != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next[0];
1370 next[1] = lm->local_next_by_ip_protocol[ip[1]->protocol];
1372 error[1] != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next[1];
1374 b[0]->error = error_node->errors[0];
1375 b[1]->error = error_node->errors[1];
1377 if (head_of_feature_arc)
1380 ip6_unknown[0] = error[0] == (u8) IP6_ERROR_UNKNOWN_PROTOCOL;
1381 ip6_unknown[1] = error[1] == (u8) IP6_ERROR_UNKNOWN_PROTOCOL;
1382 if (PREDICT_TRUE (ip6_unknown[0]))
1384 u32 next32 = next[0];
1385 vnet_feature_arc_start (arc_index,
1386 vnet_buffer (b[0])->sw_if_index
1387 [VLIB_RX], &next32, b[0]);
1390 if (PREDICT_TRUE (ip6_unknown[1]))
1392 u32 next32 = next[1];
1393 vnet_feature_arc_start (arc_index,
1394 vnet_buffer (b[1])->sw_if_index
1395 [VLIB_RX], &next32, b[1]);
1409 error = IP6_ERROR_UNKNOWN_PROTOCOL;
1412 ip = vlib_buffer_get_current (b[0]);
1414 if (head_of_feature_arc)
1416 vnet_buffer (b[0])->l3_hdr_offset = b[0]->current_data;
1417 u8 type = lm->builtin_protocol_by_ip_protocol[ip->protocol];
1419 u32 flags = b[0]->flags;
1421 flags & (VNET_BUFFER_F_L4_CHECKSUM_CORRECT |
1422 VNET_BUFFER_F_OFFLOAD_TCP_CKSUM |
1423 VNET_BUFFER_F_OFFLOAD_UDP_CKSUM);
1427 u8 is_tcp_udp = ip6_next_proto_is_tcp_udp (b[0], ip, &udp_offset);
1428 if (PREDICT_TRUE (is_tcp_udp))
1430 udp_header_t *udp = (udp_header_t *) ((u8 *) ip + udp_offset);
1431 /* Don't verify UDP checksum for packets with explicit zero checksum. */
1432 good_l4_csum |= type == IP_BUILTIN_PROTOCOL_UDP
1433 && udp->checksum == 0;
1434 /* optimistically verify UDP length. */
1435 u16 ip_len, udp_len;
1436 ip_len = clib_net_to_host_u16 (ip->payload_length);
1437 udp_len = clib_net_to_host_u16 (udp->length);
1438 len_diff = ip_len - udp_len;
1441 good_l4_csum |= type == IP_BUILTIN_PROTOCOL_UNKNOWN;
1442 len_diff = type == IP_BUILTIN_PROTOCOL_UDP ? len_diff : 0;
1444 u8 need_csum = type != IP_BUILTIN_PROTOCOL_UNKNOWN && !good_l4_csum
1445 && !(flags & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED);
1446 if (PREDICT_FALSE (need_csum))
1448 flags = ip6_tcp_udp_icmp_validate_checksum (vm, b[0]);
1449 good_l4_csum = flags & VNET_BUFFER_F_L4_CHECKSUM_CORRECT;
1450 error = IP6_ERROR_UNKNOWN_PROTOCOL;
1454 if (ip6_tcp_udp_icmp_bad_length (vm, b[0]))
1455 error = IP6_ERROR_BAD_LENGTH;
1460 error = len_diff < 0 ? IP6_ERROR_UDP_LENGTH : error;
1462 STATIC_ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_UDP ==
1463 IP6_ERROR_UDP_CHECKSUM,
1464 "Wrong IP6 errors constants");
1465 STATIC_ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_ICMP ==
1466 IP6_ERROR_ICMP_CHECKSUM,
1467 "Wrong IP6 errors constants");
1469 error = !good_l4_csum ? IP6_ERROR_UDP_CHECKSUM + type : error;
1471 /* Drop packets from unroutable hosts. */
1472 /* If this is a neighbor solicitation (ICMP), skip source RPF check */
1473 u8 unroutable = error == IP6_ERROR_UNKNOWN_PROTOCOL
1474 && type != IP_BUILTIN_PROTOCOL_ICMP
1475 && !ip6_address_is_link_local_unicast (&ip->src_address);
1476 if (PREDICT_FALSE (unroutable))
1479 !ip6_urpf_loose_check (im, b[0],
1480 ip) ? IP6_ERROR_SRC_LOOKUP_MISS :
1484 vnet_buffer (b[0])->ip.fib_index =
1485 vnet_buffer (b[0])->sw_if_index[VLIB_TX] != ~0 ?
1486 vnet_buffer (b[0])->sw_if_index[VLIB_TX] :
1487 vnet_buffer (b[0])->ip.fib_index;
1488 } /* head_of_feature_arc */
1490 next[0] = lm->local_next_by_ip_protocol[ip->protocol];
1492 error != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next[0];
1494 b[0]->error = error_node->errors[0];
1496 if (head_of_feature_arc)
1498 if (PREDICT_TRUE (error == (u8) IP6_ERROR_UNKNOWN_PROTOCOL))
1500 u32 next32 = next[0];
1501 vnet_feature_arc_start (arc_index,
1502 vnet_buffer (b[0])->sw_if_index
1503 [VLIB_RX], &next32, b[0]);
1514 vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors);
1515 return frame->n_vectors;
1518 VLIB_NODE_FN (ip6_local_node) (vlib_main_t * vm, vlib_node_runtime_t * node,
1519 vlib_frame_t * frame)
1521 return ip6_local_inline (vm, node, frame, 1 /* head of feature arc */ );
1525 VLIB_REGISTER_NODE (ip6_local_node) =
1527 .name = "ip6-local",
1528 .vector_size = sizeof (u32),
1529 .format_trace = format_ip6_forward_next_trace,
1530 .n_next_nodes = IP_LOCAL_N_NEXT,
1533 [IP_LOCAL_NEXT_DROP] = "ip6-drop",
1534 [IP_LOCAL_NEXT_PUNT] = "ip6-punt",
1535 [IP_LOCAL_NEXT_UDP_LOOKUP] = "ip6-udp-lookup",
1536 [IP_LOCAL_NEXT_ICMP] = "ip6-icmp-input",
1537 [IP_LOCAL_NEXT_REASSEMBLY] = "ip6-full-reassembly",
1542 VLIB_NODE_FN (ip6_local_end_of_arc_node) (vlib_main_t * vm,
1543 vlib_node_runtime_t * node,
1544 vlib_frame_t * frame)
1546 return ip6_local_inline (vm, node, frame, 0 /* head of feature arc */ );
1550 VLIB_REGISTER_NODE (ip6_local_end_of_arc_node) = {
1551 .name = "ip6-local-end-of-arc",
1552 .vector_size = sizeof (u32),
1554 .format_trace = format_ip6_forward_next_trace,
1555 .sibling_of = "ip6-local",
1558 VNET_FEATURE_INIT (ip6_local_end_of_arc, static) = {
1559 .arc_name = "ip6-local",
1560 .node_name = "ip6-local-end-of-arc",
1561 .runs_before = 0, /* not before any other features */
1565 #ifdef CLIB_MARCH_VARIANT
1566 extern vlib_node_registration_t ip6_local_node;
1571 ip6_register_protocol (u32 protocol, u32 node_index)
1573 vlib_main_t *vm = vlib_get_main ();
1574 ip6_main_t *im = &ip6_main;
1575 ip_lookup_main_t *lm = &im->lookup_main;
1577 ASSERT (protocol < ARRAY_LEN (lm->local_next_by_ip_protocol));
1578 lm->local_next_by_ip_protocol[protocol] =
1579 vlib_node_add_next (vm, ip6_local_node.index, node_index);
1583 ip6_unregister_protocol (u32 protocol)
1585 ip6_main_t *im = &ip6_main;
1586 ip_lookup_main_t *lm = &im->lookup_main;
1588 ASSERT (protocol < ARRAY_LEN (lm->local_next_by_ip_protocol));
1589 lm->local_next_by_ip_protocol[protocol] = IP_LOCAL_NEXT_PUNT;
1593 ip6_probe_neighbor (vlib_main_t * vm, ip6_address_t * dst, u32 sw_if_index,
1596 vnet_main_t *vnm = vnet_get_main ();
1597 ip6_main_t *im = &ip6_main;
1598 icmp6_neighbor_solicitation_header_t *h;
1600 ip_interface_address_t *ia;
1601 ip_adjacency_t *adj;
1602 vnet_hw_interface_t *hi;
1603 vnet_sw_interface_t *si;
1609 si = vnet_get_sw_interface (vnm, sw_if_index);
1611 if (!(si->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP))
1613 return clib_error_return (0, "%U: interface %U down",
1614 format_ip6_address, dst,
1615 format_vnet_sw_if_index_name, vnm,
1620 ip6_interface_address_matching_destination (im, dst, sw_if_index, &ia);
1623 vnm->api_errno = VNET_API_ERROR_NO_MATCHING_INTERFACE;
1624 return clib_error_return
1625 (0, "no matching interface address for destination %U (interface %U)",
1626 format_ip6_address, dst,
1627 format_vnet_sw_if_index_name, vnm, sw_if_index);
1631 vlib_packet_template_get_packet (vm,
1632 &im->discover_neighbor_packet_template,
1635 return clib_error_return (0, "ICMP6 NS packet allocation failed");
1637 hi = vnet_get_sup_hw_interface (vnm, sw_if_index);
1639 /* Destination address is a solicited node multicast address. We need to fill in
1640 the low 24 bits with low 24 bits of target's address. */
1641 h->ip.dst_address.as_u8[13] = dst->as_u8[13];
1642 h->ip.dst_address.as_u8[14] = dst->as_u8[14];
1643 h->ip.dst_address.as_u8[15] = dst->as_u8[15];
1645 h->ip.src_address = src[0];
1646 h->neighbor.target_address = dst[0];
1648 if (PREDICT_FALSE (!hi->hw_address))
1650 return clib_error_return (0, "%U: interface %U do not support ip probe",
1651 format_ip6_address, dst,
1652 format_vnet_sw_if_index_name, vnm,
1656 clib_memcpy_fast (h->link_layer_option.ethernet_address, hi->hw_address,
1657 vec_len (hi->hw_address));
1659 h->neighbor.icmp.checksum =
1660 ip6_tcp_udp_icmp_compute_checksum (vm, 0, &h->ip, &bogus_length);
1661 ASSERT (bogus_length == 0);
1663 b = vlib_get_buffer (vm, bi);
1664 vnet_buffer (b)->sw_if_index[VLIB_RX] =
1665 vnet_buffer (b)->sw_if_index[VLIB_TX] = sw_if_index;
1667 /* Add encapsulation string for software interface (e.g. ethernet header). */
1668 ip46_address_t nh = {
1672 ai = adj_nbr_add_or_lock (FIB_PROTOCOL_IP6,
1673 VNET_LINK_IP6, &nh, sw_if_index);
1676 /* Peer has been previously resolved, retrieve glean adj instead */
1677 if (adj->lookup_next_index == IP_LOOKUP_NEXT_REWRITE && refresh == 0)
1680 ai = adj_glean_add_or_lock (FIB_PROTOCOL_IP6,
1681 VNET_LINK_IP6, sw_if_index, &nh);
1685 vnet_rewrite_one_header (adj[0], h, sizeof (ethernet_header_t));
1686 vlib_buffer_advance (b, -adj->rewrite_header.data_bytes);
1689 vlib_frame_t *f = vlib_get_frame_to_node (vm, hi->output_node_index);
1690 u32 *to_next = vlib_frame_vector_args (f);
1693 vlib_put_frame_to_node (vm, hi->output_node_index, f);
1697 return /* no error */ 0;
1703 IP6_REWRITE_NEXT_DROP,
1704 IP6_REWRITE_NEXT_ICMP_ERROR,
1705 IP6_REWRITE_NEXT_FRAGMENT,
1706 IP6_REWRITE_N_NEXT /* Last */
1707 } ip6_rewrite_next_t;
1710 * This bits of an IPv6 address to mask to construct a multicast
1713 #define IP6_MCAST_ADDR_MASK 0xffffffff
1716 ip6_mtu_check (vlib_buffer_t * b, u16 packet_bytes,
1717 u16 adj_packet_bytes, bool is_locally_generated,
1718 u32 * next, u8 is_midchain, u32 * error)
1720 if (adj_packet_bytes >= 1280 && packet_bytes > adj_packet_bytes)
1722 if (is_locally_generated)
1724 /* IP fragmentation */
1725 ip_frag_set_vnet_buffer (b, adj_packet_bytes,
1727 IP_FRAG_NEXT_IP_REWRITE_MIDCHAIN :
1728 IP_FRAG_NEXT_IP_REWRITE), 0);
1729 *next = IP6_REWRITE_NEXT_FRAGMENT;
1730 *error = IP6_ERROR_MTU_EXCEEDED;
1734 *error = IP6_ERROR_MTU_EXCEEDED;
1735 icmp6_error_set_vnet_buffer (b, ICMP6_packet_too_big, 0,
1737 *next = IP6_REWRITE_NEXT_ICMP_ERROR;
1743 ip6_rewrite_inline_with_gso (vlib_main_t * vm,
1744 vlib_node_runtime_t * node,
1745 vlib_frame_t * frame,
1746 int do_counters, int is_midchain, int is_mcast)
1748 ip_lookup_main_t *lm = &ip6_main.lookup_main;
1749 u32 *from = vlib_frame_vector_args (frame);
1750 u32 n_left_from, n_left_to_next, *to_next, next_index;
1751 vlib_node_runtime_t *error_node =
1752 vlib_node_get_runtime (vm, ip6_input_node.index);
1754 n_left_from = frame->n_vectors;
1755 next_index = node->cached_next_index;
1756 u32 thread_index = vm->thread_index;
1758 while (n_left_from > 0)
1760 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1762 while (n_left_from >= 4 && n_left_to_next >= 2)
1764 const ip_adjacency_t *adj0, *adj1;
1765 vlib_buffer_t *p0, *p1;
1766 ip6_header_t *ip0, *ip1;
1767 u32 pi0, rw_len0, next0, error0, adj_index0;
1768 u32 pi1, rw_len1, next1, error1, adj_index1;
1769 u32 tx_sw_if_index0, tx_sw_if_index1;
1770 bool is_locally_originated0, is_locally_originated1;
1772 /* Prefetch next iteration. */
1774 vlib_buffer_t *p2, *p3;
1776 p2 = vlib_get_buffer (vm, from[2]);
1777 p3 = vlib_get_buffer (vm, from[3]);
1779 vlib_prefetch_buffer_header (p2, LOAD);
1780 vlib_prefetch_buffer_header (p3, LOAD);
1782 CLIB_PREFETCH (p2->pre_data, 32, STORE);
1783 CLIB_PREFETCH (p3->pre_data, 32, STORE);
1785 CLIB_PREFETCH (p2->data, sizeof (ip0[0]), STORE);
1786 CLIB_PREFETCH (p3->data, sizeof (ip0[0]), STORE);
1789 pi0 = to_next[0] = from[0];
1790 pi1 = to_next[1] = from[1];
1795 n_left_to_next -= 2;
1797 p0 = vlib_get_buffer (vm, pi0);
1798 p1 = vlib_get_buffer (vm, pi1);
1800 adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
1801 adj_index1 = vnet_buffer (p1)->ip.adj_index[VLIB_TX];
1803 ip0 = vlib_buffer_get_current (p0);
1804 ip1 = vlib_buffer_get_current (p1);
1806 error0 = error1 = IP6_ERROR_NONE;
1807 next0 = next1 = IP6_REWRITE_NEXT_DROP;
1809 is_locally_originated0 =
1810 p0->flags & VNET_BUFFER_F_LOCALLY_ORIGINATED;
1811 if (PREDICT_TRUE (!is_locally_originated0))
1813 i32 hop_limit0 = ip0->hop_limit;
1815 /* Input node should have reject packets with hop limit 0. */
1816 ASSERT (ip0->hop_limit > 0);
1820 ip0->hop_limit = hop_limit0;
1823 * If the hop count drops below 1 when forwarding, generate
1826 if (PREDICT_FALSE (hop_limit0 <= 0))
1828 error0 = IP6_ERROR_TIME_EXPIRED;
1829 next0 = IP6_REWRITE_NEXT_ICMP_ERROR;
1830 vnet_buffer (p0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
1831 icmp6_error_set_vnet_buffer (p0, ICMP6_time_exceeded,
1832 ICMP6_time_exceeded_ttl_exceeded_in_transit,
1838 p0->flags &= ~VNET_BUFFER_F_LOCALLY_ORIGINATED;
1840 is_locally_originated1 =
1841 p1->flags & VNET_BUFFER_F_LOCALLY_ORIGINATED;
1842 if (PREDICT_TRUE (!is_locally_originated1))
1844 i32 hop_limit1 = ip1->hop_limit;
1846 /* Input node should have reject packets with hop limit 0. */
1847 ASSERT (ip1->hop_limit > 0);
1851 ip1->hop_limit = hop_limit1;
1854 * If the hop count drops below 1 when forwarding, generate
1857 if (PREDICT_FALSE (hop_limit1 <= 0))
1859 error1 = IP6_ERROR_TIME_EXPIRED;
1860 next1 = IP6_REWRITE_NEXT_ICMP_ERROR;
1861 vnet_buffer (p1)->sw_if_index[VLIB_TX] = (u32) ~ 0;
1862 icmp6_error_set_vnet_buffer (p1, ICMP6_time_exceeded,
1863 ICMP6_time_exceeded_ttl_exceeded_in_transit,
1869 p1->flags &= ~VNET_BUFFER_F_LOCALLY_ORIGINATED;
1871 adj0 = adj_get (adj_index0);
1872 adj1 = adj_get (adj_index1);
1874 rw_len0 = adj0[0].rewrite_header.data_bytes;
1875 rw_len1 = adj1[0].rewrite_header.data_bytes;
1876 vnet_buffer (p0)->ip.save_rewrite_length = rw_len0;
1877 vnet_buffer (p1)->ip.save_rewrite_length = rw_len1;
1881 vlib_increment_combined_counter
1882 (&adjacency_counters,
1883 thread_index, adj_index0, 1,
1884 vlib_buffer_length_in_chain (vm, p0) + rw_len0);
1885 vlib_increment_combined_counter
1886 (&adjacency_counters,
1887 thread_index, adj_index1, 1,
1888 vlib_buffer_length_in_chain (vm, p1) + rw_len1);
1891 /* Check MTU of outgoing interface. */
1893 clib_net_to_host_u16 (ip0->payload_length) +
1894 sizeof (ip6_header_t);
1896 clib_net_to_host_u16 (ip1->payload_length) +
1897 sizeof (ip6_header_t);
1898 if (p0->flags & VNET_BUFFER_F_GSO)
1899 ip0_len = gso_mtu_sz (p0);
1900 if (p1->flags & VNET_BUFFER_F_GSO)
1901 ip1_len = gso_mtu_sz (p1);
1905 ip6_mtu_check (p0, ip0_len,
1906 adj0[0].rewrite_header.max_l3_packet_bytes,
1907 is_locally_originated0, &next0, is_midchain,
1909 ip6_mtu_check (p1, ip1_len,
1910 adj1[0].rewrite_header.max_l3_packet_bytes,
1911 is_locally_originated1, &next1, is_midchain,
1914 /* Don't adjust the buffer for hop count issue; icmp-error node
1915 * wants to see the IP header */
1916 if (PREDICT_TRUE (error0 == IP6_ERROR_NONE))
1918 p0->current_data -= rw_len0;
1919 p0->current_length += rw_len0;
1921 tx_sw_if_index0 = adj0[0].rewrite_header.sw_if_index;
1922 vnet_buffer (p0)->sw_if_index[VLIB_TX] = tx_sw_if_index0;
1923 next0 = adj0[0].rewrite_header.next_index;
1926 (adj0[0].rewrite_header.flags & VNET_REWRITE_HAS_FEATURES))
1927 vnet_feature_arc_start (lm->output_feature_arc_index,
1928 tx_sw_if_index0, &next0, p0);
1932 p0->error = error_node->errors[error0];
1934 if (PREDICT_TRUE (error1 == IP6_ERROR_NONE))
1936 p1->current_data -= rw_len1;
1937 p1->current_length += rw_len1;
1939 tx_sw_if_index1 = adj1[0].rewrite_header.sw_if_index;
1940 vnet_buffer (p1)->sw_if_index[VLIB_TX] = tx_sw_if_index1;
1941 next1 = adj1[0].rewrite_header.next_index;
1944 (adj1[0].rewrite_header.flags & VNET_REWRITE_HAS_FEATURES))
1945 vnet_feature_arc_start (lm->output_feature_arc_index,
1946 tx_sw_if_index1, &next1, p1);
1950 p1->error = error_node->errors[error1];
1955 /* before we paint on the next header, update the L4
1956 * checksums if required, since there's no offload on a tunnel */
1957 calc_checksums (vm, p0);
1958 calc_checksums (vm, p1);
1961 /* Guess we are only writing on simple Ethernet header. */
1962 vnet_rewrite_two_headers (adj0[0], adj1[0],
1963 ip0, ip1, sizeof (ethernet_header_t));
1967 if (adj0->sub_type.midchain.fixup_func)
1968 adj0->sub_type.midchain.fixup_func
1969 (vm, adj0, p0, adj0->sub_type.midchain.fixup_data);
1970 if (adj1->sub_type.midchain.fixup_func)
1971 adj1->sub_type.midchain.fixup_func
1972 (vm, adj1, p1, adj1->sub_type.midchain.fixup_data);
1977 * copy bytes from the IP address into the MAC rewrite
1979 vnet_ip_mcast_fixup_header (IP6_MCAST_ADDR_MASK,
1981 rewrite_header.dst_mcast_offset,
1982 &ip0->dst_address.as_u32[3],
1984 vnet_ip_mcast_fixup_header (IP6_MCAST_ADDR_MASK,
1986 rewrite_header.dst_mcast_offset,
1987 &ip1->dst_address.as_u32[3],
1991 vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
1992 to_next, n_left_to_next,
1993 pi0, pi1, next0, next1);
1996 while (n_left_from > 0 && n_left_to_next > 0)
1998 ip_adjacency_t *adj0;
2002 u32 adj_index0, next0, error0;
2003 u32 tx_sw_if_index0;
2004 bool is_locally_originated0;
2006 pi0 = to_next[0] = from[0];
2008 p0 = vlib_get_buffer (vm, pi0);
2010 adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
2012 adj0 = adj_get (adj_index0);
2014 ip0 = vlib_buffer_get_current (p0);
2016 error0 = IP6_ERROR_NONE;
2017 next0 = IP6_REWRITE_NEXT_DROP;
2019 /* Check hop limit */
2020 is_locally_originated0 =
2021 p0->flags & VNET_BUFFER_F_LOCALLY_ORIGINATED;
2022 if (PREDICT_TRUE (!is_locally_originated0))
2024 i32 hop_limit0 = ip0->hop_limit;
2026 ASSERT (ip0->hop_limit > 0);
2030 ip0->hop_limit = hop_limit0;
2032 if (PREDICT_FALSE (hop_limit0 <= 0))
2035 * If the hop count drops below 1 when forwarding, generate
2038 error0 = IP6_ERROR_TIME_EXPIRED;
2039 next0 = IP6_REWRITE_NEXT_ICMP_ERROR;
2040 vnet_buffer (p0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
2041 icmp6_error_set_vnet_buffer (p0, ICMP6_time_exceeded,
2042 ICMP6_time_exceeded_ttl_exceeded_in_transit,
2048 p0->flags &= ~VNET_BUFFER_F_LOCALLY_ORIGINATED;
2053 calc_checksums (vm, p0);
2056 /* Guess we are only writing on simple Ethernet header. */
2057 vnet_rewrite_one_header (adj0[0], ip0, sizeof (ethernet_header_t));
2059 /* Update packet buffer attributes/set output interface. */
2060 rw_len0 = adj0[0].rewrite_header.data_bytes;
2061 vnet_buffer (p0)->ip.save_rewrite_length = rw_len0;
2065 vlib_increment_combined_counter
2066 (&adjacency_counters,
2067 thread_index, adj_index0, 1,
2068 vlib_buffer_length_in_chain (vm, p0) + rw_len0);
2071 /* Check MTU of outgoing interface. */
2073 clib_net_to_host_u16 (ip0->payload_length) +
2074 sizeof (ip6_header_t);
2075 if (p0->flags & VNET_BUFFER_F_GSO)
2076 ip0_len = gso_mtu_sz (p0);
2078 ip6_mtu_check (p0, ip0_len,
2079 adj0[0].rewrite_header.max_l3_packet_bytes,
2080 is_locally_originated0, &next0, is_midchain,
2083 /* Don't adjust the buffer for hop count issue; icmp-error node
2084 * wants to see the IP header */
2085 if (PREDICT_TRUE (error0 == IP6_ERROR_NONE))
2087 p0->current_data -= rw_len0;
2088 p0->current_length += rw_len0;
2090 tx_sw_if_index0 = adj0[0].rewrite_header.sw_if_index;
2092 vnet_buffer (p0)->sw_if_index[VLIB_TX] = tx_sw_if_index0;
2093 next0 = adj0[0].rewrite_header.next_index;
2096 (adj0[0].rewrite_header.flags & VNET_REWRITE_HAS_FEATURES))
2097 vnet_feature_arc_start (lm->output_feature_arc_index,
2098 tx_sw_if_index0, &next0, p0);
2102 p0->error = error_node->errors[error0];
2107 if (adj0->sub_type.midchain.fixup_func)
2108 adj0->sub_type.midchain.fixup_func
2109 (vm, adj0, p0, adj0->sub_type.midchain.fixup_data);
2113 vnet_ip_mcast_fixup_header (IP6_MCAST_ADDR_MASK,
2115 rewrite_header.dst_mcast_offset,
2116 &ip0->dst_address.as_u32[3],
2123 n_left_to_next -= 1;
2125 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
2126 to_next, n_left_to_next,
2130 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2133 /* Need to do trace after rewrites to pick up new packet data. */
2134 if (node->flags & VLIB_NODE_FLAG_TRACE)
2135 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
2137 return frame->n_vectors;
2141 ip6_rewrite_inline (vlib_main_t * vm,
2142 vlib_node_runtime_t * node,
2143 vlib_frame_t * frame,
2144 int do_counters, int is_midchain, int is_mcast)
2146 return ip6_rewrite_inline_with_gso (vm, node, frame, do_counters,
2147 is_midchain, is_mcast);
2150 VLIB_NODE_FN (ip6_rewrite_node) (vlib_main_t * vm,
2151 vlib_node_runtime_t * node,
2152 vlib_frame_t * frame)
2154 if (adj_are_counters_enabled ())
2155 return ip6_rewrite_inline (vm, node, frame, 1, 0, 0);
2157 return ip6_rewrite_inline (vm, node, frame, 0, 0, 0);
2160 VLIB_NODE_FN (ip6_rewrite_bcast_node) (vlib_main_t * vm,
2161 vlib_node_runtime_t * node,
2162 vlib_frame_t * frame)
2164 if (adj_are_counters_enabled ())
2165 return ip6_rewrite_inline (vm, node, frame, 1, 0, 0);
2167 return ip6_rewrite_inline (vm, node, frame, 0, 0, 0);
2170 VLIB_NODE_FN (ip6_rewrite_mcast_node) (vlib_main_t * vm,
2171 vlib_node_runtime_t * node,
2172 vlib_frame_t * frame)
2174 if (adj_are_counters_enabled ())
2175 return ip6_rewrite_inline (vm, node, frame, 1, 0, 1);
2177 return ip6_rewrite_inline (vm, node, frame, 0, 0, 1);
2180 VLIB_NODE_FN (ip6_midchain_node) (vlib_main_t * vm,
2181 vlib_node_runtime_t * node,
2182 vlib_frame_t * frame)
2184 if (adj_are_counters_enabled ())
2185 return ip6_rewrite_inline (vm, node, frame, 1, 1, 0);
2187 return ip6_rewrite_inline (vm, node, frame, 0, 1, 0);
2190 VLIB_NODE_FN (ip6_mcast_midchain_node) (vlib_main_t * vm,
2191 vlib_node_runtime_t * node,
2192 vlib_frame_t * frame)
2194 if (adj_are_counters_enabled ())
2195 return ip6_rewrite_inline (vm, node, frame, 1, 1, 1);
2197 return ip6_rewrite_inline (vm, node, frame, 0, 1, 1);
2201 VLIB_REGISTER_NODE (ip6_midchain_node) =
2203 .name = "ip6-midchain",
2204 .vector_size = sizeof (u32),
2205 .format_trace = format_ip6_forward_next_trace,
2206 .sibling_of = "ip6-rewrite",
2209 VLIB_REGISTER_NODE (ip6_rewrite_node) =
2211 .name = "ip6-rewrite",
2212 .vector_size = sizeof (u32),
2213 .format_trace = format_ip6_rewrite_trace,
2214 .n_next_nodes = IP6_REWRITE_N_NEXT,
2217 [IP6_REWRITE_NEXT_DROP] = "ip6-drop",
2218 [IP6_REWRITE_NEXT_ICMP_ERROR] = "ip6-icmp-error",
2219 [IP6_REWRITE_NEXT_FRAGMENT] = "ip6-frag",
2223 VLIB_REGISTER_NODE (ip6_rewrite_bcast_node) = {
2224 .name = "ip6-rewrite-bcast",
2225 .vector_size = sizeof (u32),
2227 .format_trace = format_ip6_rewrite_trace,
2228 .sibling_of = "ip6-rewrite",
2231 VLIB_REGISTER_NODE (ip6_rewrite_mcast_node) =
2233 .name = "ip6-rewrite-mcast",
2234 .vector_size = sizeof (u32),
2235 .format_trace = format_ip6_rewrite_trace,
2236 .sibling_of = "ip6-rewrite",
2240 VLIB_REGISTER_NODE (ip6_mcast_midchain_node) =
2242 .name = "ip6-mcast-midchain",
2243 .vector_size = sizeof (u32),
2244 .format_trace = format_ip6_rewrite_trace,
2245 .sibling_of = "ip6-rewrite",
2251 * Hop-by-Hop handling
2253 #ifndef CLIB_MARCH_VARIANT
2254 ip6_hop_by_hop_main_t ip6_hop_by_hop_main;
2255 #endif /* CLIB_MARCH_VARIANT */
2257 #define foreach_ip6_hop_by_hop_error \
2258 _(PROCESSED, "pkts with ip6 hop-by-hop options") \
2259 _(FORMAT, "incorrectly formatted hop-by-hop options") \
2260 _(UNKNOWN_OPTION, "unknown ip6 hop-by-hop options")
2265 #define _(sym,str) IP6_HOP_BY_HOP_ERROR_##sym,
2266 foreach_ip6_hop_by_hop_error
2268 IP6_HOP_BY_HOP_N_ERROR,
2269 } ip6_hop_by_hop_error_t;
2273 * Primary h-b-h handler trace support
2274 * We work pretty hard on the problem for obvious reasons
2280 u8 option_data[256];
2281 } ip6_hop_by_hop_trace_t;
2283 extern vlib_node_registration_t ip6_hop_by_hop_node;
2285 static char *ip6_hop_by_hop_error_strings[] = {
2286 #define _(sym,string) string,
2287 foreach_ip6_hop_by_hop_error
2291 #ifndef CLIB_MARCH_VARIANT
2293 format_ip6_hop_by_hop_ext_hdr (u8 * s, va_list * args)
2295 ip6_hop_by_hop_header_t *hbh0 = va_arg (*args, ip6_hop_by_hop_header_t *);
2296 int total_len = va_arg (*args, int);
2297 ip6_hop_by_hop_option_t *opt0, *limit0;
2298 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2301 s = format (s, "IP6_HOP_BY_HOP: next protocol %d len %d total %d",
2302 hbh0->protocol, (hbh0->length + 1) << 3, total_len);
2304 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2305 limit0 = (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 + total_len);
2307 while (opt0 < limit0)
2312 case 0: /* Pad, just stop */
2313 opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0 + 1);
2317 if (hm->trace[type0])
2319 s = (*hm->trace[type0]) (s, opt0);
2324 format (s, "\n unrecognized option %d length %d", type0,
2328 (ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length +
2329 sizeof (ip6_hop_by_hop_option_t));
2338 format_ip6_hop_by_hop_trace (u8 * s, va_list * args)
2340 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
2341 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
2342 ip6_hop_by_hop_trace_t *t = va_arg (*args, ip6_hop_by_hop_trace_t *);
2343 ip6_hop_by_hop_header_t *hbh0;
2344 ip6_hop_by_hop_option_t *opt0, *limit0;
2345 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2349 hbh0 = (ip6_hop_by_hop_header_t *) t->option_data;
2351 s = format (s, "IP6_HOP_BY_HOP: next index %d len %d traced %d",
2352 t->next_index, (hbh0->length + 1) << 3, t->trace_len);
2354 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2355 limit0 = (ip6_hop_by_hop_option_t *) ((u8 *) hbh0) + t->trace_len;
2357 while (opt0 < limit0)
2362 case 0: /* Pad, just stop */
2363 opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0) + 1;
2367 if (hm->trace[type0])
2369 s = (*hm->trace[type0]) (s, opt0);
2374 format (s, "\n unrecognized option %d length %d", type0,
2378 (ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length +
2379 sizeof (ip6_hop_by_hop_option_t));
2387 ip6_scan_hbh_options (vlib_buffer_t * b0,
2389 ip6_hop_by_hop_header_t * hbh0,
2390 ip6_hop_by_hop_option_t * opt0,
2391 ip6_hop_by_hop_option_t * limit0, u32 * next0)
2393 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2397 while (opt0 < limit0)
2403 opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0) + 1;
2408 if (hm->options[type0])
2410 if ((*hm->options[type0]) (b0, ip0, opt0) < 0)
2412 error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2418 /* Unrecognized mandatory option, check the two high order bits */
2419 switch (opt0->type & HBH_OPTION_TYPE_HIGH_ORDER_BITS)
2421 case HBH_OPTION_TYPE_SKIP_UNKNOWN:
2423 case HBH_OPTION_TYPE_DISCARD_UNKNOWN:
2424 error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2425 *next0 = IP_LOOKUP_NEXT_DROP;
2427 case HBH_OPTION_TYPE_DISCARD_UNKNOWN_ICMP:
2428 error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2429 *next0 = IP_LOOKUP_NEXT_ICMP_ERROR;
2430 icmp6_error_set_vnet_buffer (b0, ICMP6_parameter_problem,
2431 ICMP6_parameter_problem_unrecognized_option,
2432 (u8 *) opt0 - (u8 *) ip0);
2434 case HBH_OPTION_TYPE_DISCARD_UNKNOWN_ICMP_NOT_MCAST:
2435 error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2436 if (!ip6_address_is_multicast (&ip0->dst_address))
2438 *next0 = IP_LOOKUP_NEXT_ICMP_ERROR;
2439 icmp6_error_set_vnet_buffer (b0,
2440 ICMP6_parameter_problem,
2441 ICMP6_parameter_problem_unrecognized_option,
2442 (u8 *) opt0 - (u8 *) ip0);
2446 *next0 = IP_LOOKUP_NEXT_DROP;
2454 (ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length +
2455 sizeof (ip6_hop_by_hop_option_t));
2461 * Process the Hop-by-Hop Options header
2463 VLIB_NODE_FN (ip6_hop_by_hop_node) (vlib_main_t * vm,
2464 vlib_node_runtime_t * node,
2465 vlib_frame_t * frame)
2467 vlib_node_runtime_t *error_node =
2468 vlib_node_get_runtime (vm, ip6_hop_by_hop_node.index);
2469 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2470 u32 n_left_from, *from, *to_next;
2471 ip_lookup_next_t next_index;
2473 from = vlib_frame_vector_args (frame);
2474 n_left_from = frame->n_vectors;
2475 next_index = node->cached_next_index;
2477 while (n_left_from > 0)
2481 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
2483 while (n_left_from >= 4 && n_left_to_next >= 2)
2486 vlib_buffer_t *b0, *b1;
2488 ip6_header_t *ip0, *ip1;
2489 ip6_hop_by_hop_header_t *hbh0, *hbh1;
2490 ip6_hop_by_hop_option_t *opt0, *limit0, *opt1, *limit1;
2491 u8 error0 = 0, error1 = 0;
2493 /* Prefetch next iteration. */
2495 vlib_buffer_t *p2, *p3;
2497 p2 = vlib_get_buffer (vm, from[2]);
2498 p3 = vlib_get_buffer (vm, from[3]);
2500 vlib_prefetch_buffer_header (p2, LOAD);
2501 vlib_prefetch_buffer_header (p3, LOAD);
2503 CLIB_PREFETCH (p2->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
2504 CLIB_PREFETCH (p3->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
2507 /* Speculatively enqueue b0, b1 to the current next frame */
2508 to_next[0] = bi0 = from[0];
2509 to_next[1] = bi1 = from[1];
2513 n_left_to_next -= 2;
2515 b0 = vlib_get_buffer (vm, bi0);
2516 b1 = vlib_get_buffer (vm, bi1);
2518 /* Default use the next_index from the adjacency. A HBH option rarely redirects to a different node */
2519 u32 adj_index0 = vnet_buffer (b0)->ip.adj_index[VLIB_TX];
2520 ip_adjacency_t *adj0 = adj_get (adj_index0);
2521 u32 adj_index1 = vnet_buffer (b1)->ip.adj_index[VLIB_TX];
2522 ip_adjacency_t *adj1 = adj_get (adj_index1);
2524 /* Default use the next_index from the adjacency. A HBH option rarely redirects to a different node */
2525 next0 = adj0->lookup_next_index;
2526 next1 = adj1->lookup_next_index;
2528 ip0 = vlib_buffer_get_current (b0);
2529 ip1 = vlib_buffer_get_current (b1);
2530 hbh0 = (ip6_hop_by_hop_header_t *) (ip0 + 1);
2531 hbh1 = (ip6_hop_by_hop_header_t *) (ip1 + 1);
2532 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2533 opt1 = (ip6_hop_by_hop_option_t *) (hbh1 + 1);
2535 (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 +
2536 ((hbh0->length + 1) << 3));
2538 (ip6_hop_by_hop_option_t *) ((u8 *) hbh1 +
2539 ((hbh1->length + 1) << 3));
2542 * Basic validity checks
2544 if ((hbh0->length + 1) << 3 >
2545 clib_net_to_host_u16 (ip0->payload_length))
2547 error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2548 next0 = IP_LOOKUP_NEXT_DROP;
2551 /* Scan the set of h-b-h options, process ones that we understand */
2552 error0 = ip6_scan_hbh_options (b0, ip0, hbh0, opt0, limit0, &next0);
2554 if ((hbh1->length + 1) << 3 >
2555 clib_net_to_host_u16 (ip1->payload_length))
2557 error1 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2558 next1 = IP_LOOKUP_NEXT_DROP;
2561 /* Scan the set of h-b-h options, process ones that we understand */
2562 error1 = ip6_scan_hbh_options (b1, ip1, hbh1, opt1, limit1, &next1);
2565 /* Has the classifier flagged this buffer for special treatment? */
2568 && (vnet_buffer (b0)->l2_classify.opaque_index & OI_DECAP)))
2569 next0 = hm->next_override;
2571 /* Has the classifier flagged this buffer for special treatment? */
2574 && (vnet_buffer (b1)->l2_classify.opaque_index & OI_DECAP)))
2575 next1 = hm->next_override;
2577 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)))
2579 if (b0->flags & VLIB_BUFFER_IS_TRACED)
2581 ip6_hop_by_hop_trace_t *t =
2582 vlib_add_trace (vm, node, b0, sizeof (*t));
2583 u32 trace_len = (hbh0->length + 1) << 3;
2584 t->next_index = next0;
2585 /* Capture the h-b-h option verbatim */
2588 ARRAY_LEN (t->option_data) ? trace_len :
2589 ARRAY_LEN (t->option_data);
2590 t->trace_len = trace_len;
2591 clib_memcpy_fast (t->option_data, hbh0, trace_len);
2593 if (b1->flags & VLIB_BUFFER_IS_TRACED)
2595 ip6_hop_by_hop_trace_t *t =
2596 vlib_add_trace (vm, node, b1, sizeof (*t));
2597 u32 trace_len = (hbh1->length + 1) << 3;
2598 t->next_index = next1;
2599 /* Capture the h-b-h option verbatim */
2602 ARRAY_LEN (t->option_data) ? trace_len :
2603 ARRAY_LEN (t->option_data);
2604 t->trace_len = trace_len;
2605 clib_memcpy_fast (t->option_data, hbh1, trace_len);
2610 b0->error = error_node->errors[error0];
2611 b1->error = error_node->errors[error1];
2613 /* verify speculative enqueue, maybe switch current next frame */
2614 vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
2615 n_left_to_next, bi0, bi1, next0,
2619 while (n_left_from > 0 && n_left_to_next > 0)
2625 ip6_hop_by_hop_header_t *hbh0;
2626 ip6_hop_by_hop_option_t *opt0, *limit0;
2629 /* Speculatively enqueue b0 to the current next frame */
2635 n_left_to_next -= 1;
2637 b0 = vlib_get_buffer (vm, bi0);
2639 * Default use the next_index from the adjacency.
2640 * A HBH option rarely redirects to a different node
2642 u32 adj_index0 = vnet_buffer (b0)->ip.adj_index[VLIB_TX];
2643 ip_adjacency_t *adj0 = adj_get (adj_index0);
2644 next0 = adj0->lookup_next_index;
2646 ip0 = vlib_buffer_get_current (b0);
2647 hbh0 = (ip6_hop_by_hop_header_t *) (ip0 + 1);
2648 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2650 (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 +
2651 ((hbh0->length + 1) << 3));
2654 * Basic validity checks
2656 if ((hbh0->length + 1) << 3 >
2657 clib_net_to_host_u16 (ip0->payload_length))
2659 error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2660 next0 = IP_LOOKUP_NEXT_DROP;
2664 /* Scan the set of h-b-h options, process ones that we understand */
2665 error0 = ip6_scan_hbh_options (b0, ip0, hbh0, opt0, limit0, &next0);
2668 /* Has the classifier flagged this buffer for special treatment? */
2671 && (vnet_buffer (b0)->l2_classify.opaque_index & OI_DECAP)))
2672 next0 = hm->next_override;
2674 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
2676 ip6_hop_by_hop_trace_t *t =
2677 vlib_add_trace (vm, node, b0, sizeof (*t));
2678 u32 trace_len = (hbh0->length + 1) << 3;
2679 t->next_index = next0;
2680 /* Capture the h-b-h option verbatim */
2683 ARRAY_LEN (t->option_data) ? trace_len :
2684 ARRAY_LEN (t->option_data);
2685 t->trace_len = trace_len;
2686 clib_memcpy_fast (t->option_data, hbh0, trace_len);
2689 b0->error = error_node->errors[error0];
2691 /* verify speculative enqueue, maybe switch current next frame */
2692 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
2693 n_left_to_next, bi0, next0);
2695 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2697 return frame->n_vectors;
2701 VLIB_REGISTER_NODE (ip6_hop_by_hop_node) =
2703 .name = "ip6-hop-by-hop",
2704 .sibling_of = "ip6-lookup",
2705 .vector_size = sizeof (u32),
2706 .format_trace = format_ip6_hop_by_hop_trace,
2707 .type = VLIB_NODE_TYPE_INTERNAL,
2708 .n_errors = ARRAY_LEN (ip6_hop_by_hop_error_strings),
2709 .error_strings = ip6_hop_by_hop_error_strings,
2714 static clib_error_t *
2715 ip6_hop_by_hop_init (vlib_main_t * vm)
2717 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2718 clib_memset (hm->options, 0, sizeof (hm->options));
2719 clib_memset (hm->trace, 0, sizeof (hm->trace));
2720 hm->next_override = IP6_LOOKUP_NEXT_POP_HOP_BY_HOP;
2724 VLIB_INIT_FUNCTION (ip6_hop_by_hop_init);
2726 #ifndef CLIB_MARCH_VARIANT
2728 ip6_hbh_set_next_override (uword next)
2730 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2732 hm->next_override = next;
2736 ip6_hbh_register_option (u8 option,
2737 int options (vlib_buffer_t * b, ip6_header_t * ip,
2738 ip6_hop_by_hop_option_t * opt),
2739 u8 * trace (u8 * s, ip6_hop_by_hop_option_t * opt))
2741 ip6_main_t *im = &ip6_main;
2742 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2744 ASSERT ((u32) option < ARRAY_LEN (hm->options));
2746 /* Already registered */
2747 if (hm->options[option])
2750 hm->options[option] = options;
2751 hm->trace[option] = trace;
2753 /* Set global variable */
2754 im->hbh_enabled = 1;
2760 ip6_hbh_unregister_option (u8 option)
2762 ip6_main_t *im = &ip6_main;
2763 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2765 ASSERT ((u32) option < ARRAY_LEN (hm->options));
2767 /* Not registered */
2768 if (!hm->options[option])
2771 hm->options[option] = NULL;
2772 hm->trace[option] = NULL;
2774 /* Disable global knob if this was the last option configured */
2777 for (i = 0; i < 256; i++)
2779 if (hm->options[option])
2786 im->hbh_enabled = 0;
2791 /* Global IP6 main. */
2792 ip6_main_t ip6_main;
2795 static clib_error_t *
2796 ip6_lookup_init (vlib_main_t * vm)
2798 ip6_main_t *im = &ip6_main;
2799 clib_error_t *error;
2802 if ((error = vlib_call_init_function (vm, vnet_feature_init)))
2805 for (i = 0; i < ARRAY_LEN (im->fib_masks); i++)
2812 for (j = 0; j < i0; j++)
2813 im->fib_masks[i].as_u32[j] = ~0;
2816 im->fib_masks[i].as_u32[i0] =
2817 clib_host_to_net_u32 (pow2_mask (i1) << (32 - i1));
2820 ip_lookup_init (&im->lookup_main, /* is_ip6 */ 1);
2822 if (im->lookup_table_nbuckets == 0)
2823 im->lookup_table_nbuckets = IP6_FIB_DEFAULT_HASH_NUM_BUCKETS;
2825 im->lookup_table_nbuckets = 1 << max_log2 (im->lookup_table_nbuckets);
2827 if (im->lookup_table_size == 0)
2828 im->lookup_table_size = IP6_FIB_DEFAULT_HASH_MEMORY_SIZE;
2830 clib_bihash_init_24_8 (&(im->ip6_table[IP6_FIB_TABLE_FWDING].ip6_hash),
2831 "ip6 FIB fwding table",
2832 im->lookup_table_nbuckets, im->lookup_table_size);
2833 clib_bihash_init_24_8 (&im->ip6_table[IP6_FIB_TABLE_NON_FWDING].ip6_hash,
2834 "ip6 FIB non-fwding table",
2835 im->lookup_table_nbuckets, im->lookup_table_size);
2836 clib_bihash_init_40_8 (&im->ip6_mtable.ip6_mhash,
2838 im->lookup_table_nbuckets, im->lookup_table_size);
2840 /* Create FIB with index 0 and table id of 0. */
2841 fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6, 0,
2842 FIB_SOURCE_DEFAULT_ROUTE);
2843 mfib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6, 0,
2844 MFIB_SOURCE_DEFAULT_ROUTE);
2848 pn = pg_get_node (ip6_lookup_node.index);
2849 pn->unformat_edit = unformat_pg_ip6_header;
2852 /* Unless explicitly configured, don't process HBH options */
2853 im->hbh_enabled = 0;
2856 icmp6_neighbor_solicitation_header_t p;
2858 clib_memset (&p, 0, sizeof (p));
2860 p.ip.ip_version_traffic_class_and_flow_label =
2861 clib_host_to_net_u32 (0x6 << 28);
2862 p.ip.payload_length =
2863 clib_host_to_net_u16 (sizeof (p) -
2865 (icmp6_neighbor_solicitation_header_t, neighbor));
2866 p.ip.protocol = IP_PROTOCOL_ICMP6;
2867 p.ip.hop_limit = 255;
2868 ip6_set_solicited_node_multicast_address (&p.ip.dst_address, 0);
2870 p.neighbor.icmp.type = ICMP6_neighbor_solicitation;
2872 p.link_layer_option.header.type =
2873 ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address;
2874 p.link_layer_option.header.n_data_u64s =
2875 sizeof (p.link_layer_option) / sizeof (u64);
2877 vlib_packet_template_init (vm,
2878 &im->discover_neighbor_packet_template,
2880 /* alloc chunk size */ 8,
2881 "ip6 neighbor discovery");
2887 VLIB_INIT_FUNCTION (ip6_lookup_init);
2889 static clib_error_t *
2890 test_ip6_link_command_fn (vlib_main_t * vm,
2891 unformat_input_t * input, vlib_cli_command_t * cmd)
2894 ip6_address_t _a, *a = &_a;
2896 if (unformat (input, "%U", unformat_ethernet_address, mac))
2898 ip6_link_local_address_from_ethernet_mac_address (a, mac);
2899 vlib_cli_output (vm, "Link local address: %U", format_ip6_address, a);
2900 ip6_ethernet_mac_address_from_link_local_address (mac, a);
2901 vlib_cli_output (vm, "Original MAC address: %U",
2902 format_ethernet_address, mac);
2909 * This command converts the given MAC Address into an IPv6 link-local
2913 * Example of how to create an IPv6 link-local address:
2914 * @cliexstart{test ip6 link 16:d9:e0:91:79:86}
2915 * Link local address: fe80::14d9:e0ff:fe91:7986
2916 * Original MAC address: 16:d9:e0:91:79:86
2920 VLIB_CLI_COMMAND (test_link_command, static) =
2922 .path = "test ip6 link",
2923 .function = test_ip6_link_command_fn,
2924 .short_help = "test ip6 link <mac-address>",
2928 #ifndef CLIB_MARCH_VARIANT
2930 vnet_set_ip6_flow_hash (u32 table_id, u32 flow_hash_config)
2934 fib_index = fib_table_find (FIB_PROTOCOL_IP6, table_id);
2936 if (~0 == fib_index)
2937 return VNET_API_ERROR_NO_SUCH_FIB;
2939 fib_table_set_flow_hash_config (fib_index, FIB_PROTOCOL_IP6,
2946 static clib_error_t *
2947 set_ip6_flow_hash_command_fn (vlib_main_t * vm,
2948 unformat_input_t * input,
2949 vlib_cli_command_t * cmd)
2953 u32 flow_hash_config = 0;
2956 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
2958 if (unformat (input, "table %d", &table_id))
2961 else if (unformat (input, #a)) { flow_hash_config |= v; matched=1;}
2962 foreach_flow_hash_bit
2969 return clib_error_return (0, "unknown input `%U'",
2970 format_unformat_error, input);
2972 rv = vnet_set_ip6_flow_hash (table_id, flow_hash_config);
2979 return clib_error_return (0, "no such FIB table %d", table_id);
2982 clib_warning ("BUG: illegal flow hash config 0x%x", flow_hash_config);
2990 * Configure the set of IPv6 fields used by the flow hash.
2994 * Example of how to set the flow hash on a given table:
2995 * @cliexcmd{set ip6 flow-hash table 8 dst sport dport proto}
2997 * Example of display the configured flow hash:
2998 * @cliexstart{show ip6 fib}
2999 * ipv6-VRF:0, fib_index 0, flow hash: src dst sport dport proto
3002 * [@0]: dpo-load-balance: [index:5 buckets:1 uRPF:5 to:[0:0]]
3003 * [0] [@0]: dpo-drop ip6
3006 * [@0]: dpo-load-balance: [index:10 buckets:1 uRPF:10 to:[0:0]]
3007 * [0] [@2]: dpo-receive
3010 * [@0]: dpo-load-balance: [index:8 buckets:1 uRPF:8 to:[0:0]]
3011 * [0] [@2]: dpo-receive
3014 * [@0]: dpo-load-balance: [index:7 buckets:1 uRPF:7 to:[0:0]]
3015 * [0] [@2]: dpo-receive
3018 * [@0]: dpo-load-balance: [index:9 buckets:1 uRPF:9 to:[0:0]]
3019 * [0] [@2]: dpo-receive
3020 * ff02::1:ff00:0/104
3022 * [@0]: dpo-load-balance: [index:6 buckets:1 uRPF:6 to:[0:0]]
3023 * [0] [@2]: dpo-receive
3024 * ipv6-VRF:8, fib_index 1, flow hash: dst sport dport proto
3027 * [@0]: dpo-load-balance: [index:21 buckets:1 uRPF:20 to:[0:0]]
3028 * [0] [@0]: dpo-drop ip6
3031 * [@0]: dpo-load-balance: [index:27 buckets:1 uRPF:26 to:[0:0]]
3032 * [0] [@4]: ipv6-glean: af_packet0
3035 * [@0]: dpo-load-balance: [index:28 buckets:1 uRPF:27 to:[0:0]]
3036 * [0] [@2]: dpo-receive: @::a:1:1:0:7 on af_packet0
3039 * [@0]: dpo-load-balance: [index:26 buckets:1 uRPF:25 to:[0:0]]
3040 * [0] [@2]: dpo-receive
3041 * fe80::fe:3eff:fe3e:9222/128
3043 * [@0]: dpo-load-balance: [index:29 buckets:1 uRPF:28 to:[0:0]]
3044 * [0] [@2]: dpo-receive: fe80::fe:3eff:fe3e:9222 on af_packet0
3047 * [@0]: dpo-load-balance: [index:24 buckets:1 uRPF:23 to:[0:0]]
3048 * [0] [@2]: dpo-receive
3051 * [@0]: dpo-load-balance: [index:23 buckets:1 uRPF:22 to:[0:0]]
3052 * [0] [@2]: dpo-receive
3055 * [@0]: dpo-load-balance: [index:25 buckets:1 uRPF:24 to:[0:0]]
3056 * [0] [@2]: dpo-receive
3057 * ff02::1:ff00:0/104
3059 * [@0]: dpo-load-balance: [index:22 buckets:1 uRPF:21 to:[0:0]]
3060 * [0] [@2]: dpo-receive
3065 VLIB_CLI_COMMAND (set_ip6_flow_hash_command, static) =
3067 .path = "set ip6 flow-hash",
3069 "set ip6 flow-hash table <table-id> [src] [dst] [sport] [dport] [proto] [reverse]",
3070 .function = set_ip6_flow_hash_command_fn,
3074 static clib_error_t *
3075 show_ip6_local_command_fn (vlib_main_t * vm,
3076 unformat_input_t * input, vlib_cli_command_t * cmd)
3078 ip6_main_t *im = &ip6_main;
3079 ip_lookup_main_t *lm = &im->lookup_main;
3082 vlib_cli_output (vm, "Protocols handled by ip6_local");
3083 for (i = 0; i < ARRAY_LEN (lm->local_next_by_ip_protocol); i++)
3085 if (lm->local_next_by_ip_protocol[i] != IP_LOCAL_NEXT_PUNT)
3088 u32 node_index = vlib_get_node (vm,
3089 ip6_local_node.index)->
3090 next_nodes[lm->local_next_by_ip_protocol[i]];
3091 vlib_cli_output (vm, "%d: %U", i, format_vlib_node_name, vm,
3101 * Display the set of protocols handled by the local IPv6 stack.
3104 * Example of how to display local protocol table:
3105 * @cliexstart{show ip6 local}
3106 * Protocols handled by ip6_local
3114 VLIB_CLI_COMMAND (show_ip6_local, static) =
3116 .path = "show ip6 local",
3117 .function = show_ip6_local_command_fn,
3118 .short_help = "show ip6 local",
3122 #ifndef CLIB_MARCH_VARIANT
3124 vnet_set_ip6_classify_intfc (vlib_main_t * vm, u32 sw_if_index,
3127 vnet_main_t *vnm = vnet_get_main ();
3128 vnet_interface_main_t *im = &vnm->interface_main;
3129 ip6_main_t *ipm = &ip6_main;
3130 ip_lookup_main_t *lm = &ipm->lookup_main;
3131 vnet_classify_main_t *cm = &vnet_classify_main;
3132 ip6_address_t *if_addr;
3134 if (pool_is_free_index (im->sw_interfaces, sw_if_index))
3135 return VNET_API_ERROR_NO_MATCHING_INTERFACE;
3137 if (table_index != ~0 && pool_is_free_index (cm->tables, table_index))
3138 return VNET_API_ERROR_NO_SUCH_ENTRY;
3140 vec_validate (lm->classify_table_index_by_sw_if_index, sw_if_index);
3141 lm->classify_table_index_by_sw_if_index[sw_if_index] = table_index;
3143 if_addr = ip6_interface_first_address (ipm, sw_if_index);
3145 if (NULL != if_addr)
3147 fib_prefix_t pfx = {
3149 .fp_proto = FIB_PROTOCOL_IP6,
3150 .fp_addr.ip6 = *if_addr,
3154 fib_index = fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4,
3158 if (table_index != (u32) ~ 0)
3160 dpo_id_t dpo = DPO_INVALID;
3165 classify_dpo_create (DPO_PROTO_IP6, table_index));
3167 fib_table_entry_special_dpo_add (fib_index,
3169 FIB_SOURCE_CLASSIFY,
3170 FIB_ENTRY_FLAG_NONE, &dpo);
3175 fib_table_entry_special_remove (fib_index,
3176 &pfx, FIB_SOURCE_CLASSIFY);
3184 static clib_error_t *
3185 set_ip6_classify_command_fn (vlib_main_t * vm,
3186 unformat_input_t * input,
3187 vlib_cli_command_t * cmd)
3189 u32 table_index = ~0;
3190 int table_index_set = 0;
3191 u32 sw_if_index = ~0;
3194 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
3196 if (unformat (input, "table-index %d", &table_index))
3197 table_index_set = 1;
3198 else if (unformat (input, "intfc %U", unformat_vnet_sw_interface,
3199 vnet_get_main (), &sw_if_index))
3205 if (table_index_set == 0)
3206 return clib_error_return (0, "classify table-index must be specified");
3208 if (sw_if_index == ~0)
3209 return clib_error_return (0, "interface / subif must be specified");
3211 rv = vnet_set_ip6_classify_intfc (vm, sw_if_index, table_index);
3218 case VNET_API_ERROR_NO_MATCHING_INTERFACE:
3219 return clib_error_return (0, "No such interface");
3221 case VNET_API_ERROR_NO_SUCH_ENTRY:
3222 return clib_error_return (0, "No such classifier table");
3228 * Assign a classification table to an interface. The classification
3229 * table is created using the '<em>classify table</em>' and '<em>classify session</em>'
3230 * commands. Once the table is create, use this command to filter packets
3234 * Example of how to assign a classification table to an interface:
3235 * @cliexcmd{set ip6 classify intfc GigabitEthernet2/0/0 table-index 1}
3238 VLIB_CLI_COMMAND (set_ip6_classify_command, static) =
3240 .path = "set ip6 classify",
3242 "set ip6 classify intfc <interface> table-index <classify-idx>",
3243 .function = set_ip6_classify_command_fn,
3247 static clib_error_t *
3248 ip6_config (vlib_main_t * vm, unformat_input_t * input)
3250 ip6_main_t *im = &ip6_main;
3255 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
3257 if (unformat (input, "hash-buckets %d", &tmp))
3259 else if (unformat (input, "heap-size %U",
3260 unformat_memory_size, &heapsize))
3263 return clib_error_return (0, "unknown input '%U'",
3264 format_unformat_error, input);
3267 im->lookup_table_nbuckets = nbuckets;
3268 im->lookup_table_size = heapsize;
3273 VLIB_EARLY_CONFIG_FUNCTION (ip6_config, "ip6");
3276 * fd.io coding-style-patch-verification: ON
3279 * eval: (c-set-style "gnu")