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_link.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 const 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");
322 rv = ip6_set_link_local_address (sw_if_index, address);
327 return clib_error_create ("address not assignable");
332 ll_addr = ip6_get_link_local_address (sw_if_index);
333 if (ip6_address_is_equal (ll_addr, address))
335 vnm->api_errno = VNET_API_ERROR_ADDRESS_NOT_DELETABLE;
336 return clib_error_create ("address not deletable");
340 vnm->api_errno = VNET_API_ERROR_ADDRESS_NOT_FOUND_FOR_INTERFACE;
341 return clib_error_create ("address not found");
346 vec_validate (im->fib_index_by_sw_if_index, sw_if_index);
347 vec_validate (im->mfib_index_by_sw_if_index, sw_if_index);
349 ip6_addr_fib_init (&ip6_af, address,
350 vec_elt (im->fib_index_by_sw_if_index, sw_if_index));
351 vec_add1 (addr_fib, ip6_af);
356 /* When adding an address check that it does not conflict
357 with an existing address on any interface in this table. */
358 ip_interface_address_t *ia;
359 vnet_sw_interface_t *sif;
361 pool_foreach(sif, vnm->interface_main.sw_interfaces,
363 if (im->fib_index_by_sw_if_index[sw_if_index] ==
364 im->fib_index_by_sw_if_index[sif->sw_if_index])
366 foreach_ip_interface_address
367 (&im->lookup_main, ia, sif->sw_if_index,
368 0 /* honor unnumbered */ ,
371 ip_interface_address_get_address
372 (&im->lookup_main, ia);
373 if (ip6_destination_matches_route
374 (im, address, x, ia->address_length) ||
375 ip6_destination_matches_route (im,
380 /* an intf may have >1 addr from the same prefix */
381 if ((sw_if_index == sif->sw_if_index) &&
382 (ia->address_length == address_length) &&
383 !ip6_address_is_equal (x, address))
386 /* error if the length or intf was different */
387 vnm->api_errno = VNET_API_ERROR_DUPLICATE_IF_ADDRESS;
390 ("failed to add %U which conflicts with %U for interface %U",
391 format_ip6_address_and_length, address,
393 format_ip6_address_and_length, x,
395 format_vnet_sw_if_index_name, vnm,
405 uword elts_before = pool_elts (lm->if_address_pool);
407 error = ip_interface_address_add_del
408 (lm, sw_if_index, addr_fib, address_length, is_del, &if_address_index);
412 /* Pool did not grow: add duplicate address. */
413 if (elts_before == pool_elts (lm->if_address_pool))
417 ip6_sw_interface_enable_disable (sw_if_index, !is_del);
419 ip6_link_enable (sw_if_index);
421 /* intf addr routes are added/deleted on admin up/down */
422 if (vnet_sw_interface_is_admin_up (vnm, sw_if_index))
425 ip6_del_interface_routes (sw_if_index,
426 im, ip6_af.fib_index, address,
429 ip6_add_interface_routes (vnm, sw_if_index,
430 im, ip6_af.fib_index,
431 pool_elt_at_index (lm->if_address_pool,
435 ip6_add_del_interface_address_callback_t *cb;
436 vec_foreach (cb, im->add_del_interface_address_callbacks)
437 cb->function (im, cb->function_opaque, sw_if_index,
438 address, address_length, if_address_index, is_del);
441 ip6_link_disable (sw_if_index);
450 static clib_error_t *
451 ip6_sw_interface_admin_up_down (vnet_main_t * vnm, u32 sw_if_index, u32 flags)
453 ip6_main_t *im = &ip6_main;
454 ip_interface_address_t *ia;
456 u32 is_admin_up, fib_index;
458 /* Fill in lookup tables with default table (0). */
459 vec_validate (im->fib_index_by_sw_if_index, sw_if_index);
461 vec_validate_init_empty (im->
462 lookup_main.if_address_pool_index_by_sw_if_index,
465 is_admin_up = (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) != 0;
467 fib_index = vec_elt (im->fib_index_by_sw_if_index, sw_if_index);
470 foreach_ip_interface_address (&im->lookup_main, ia, sw_if_index,
471 0 /* honor unnumbered */,
473 a = ip_interface_address_get_address (&im->lookup_main, ia);
475 ip6_add_interface_routes (vnm, sw_if_index,
479 ip6_del_interface_routes (sw_if_index, im, fib_index,
480 a, ia->address_length);
487 VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION (ip6_sw_interface_admin_up_down);
489 /* Built-in ip6 unicast rx feature path definition */
491 VNET_FEATURE_ARC_INIT (ip6_unicast, static) =
493 .arc_name = "ip6-unicast",
494 .start_nodes = VNET_FEATURES ("ip6-input"),
495 .last_in_arc = "ip6-lookup",
496 .arc_index_ptr = &ip6_main.lookup_main.ucast_feature_arc_index,
499 VNET_FEATURE_INIT (ip6_flow_classify, static) =
501 .arc_name = "ip6-unicast",
502 .node_name = "ip6-flow-classify",
503 .runs_before = VNET_FEATURES ("ip6-inacl"),
506 VNET_FEATURE_INIT (ip6_inacl, static) =
508 .arc_name = "ip6-unicast",
509 .node_name = "ip6-inacl",
510 .runs_before = VNET_FEATURES ("ip6-policer-classify"),
513 VNET_FEATURE_INIT (ip6_policer_classify, static) =
515 .arc_name = "ip6-unicast",
516 .node_name = "ip6-policer-classify",
517 .runs_before = VNET_FEATURES ("ipsec6-input-feature"),
520 VNET_FEATURE_INIT (ip6_ipsec, static) =
522 .arc_name = "ip6-unicast",
523 .node_name = "ipsec6-input-feature",
524 .runs_before = VNET_FEATURES ("l2tp-decap"),
527 VNET_FEATURE_INIT (ip6_l2tp, static) =
529 .arc_name = "ip6-unicast",
530 .node_name = "l2tp-decap",
531 .runs_before = VNET_FEATURES ("vpath-input-ip6"),
534 VNET_FEATURE_INIT (ip6_vpath, static) =
536 .arc_name = "ip6-unicast",
537 .node_name = "vpath-input-ip6",
538 .runs_before = VNET_FEATURES ("ip6-vxlan-bypass"),
541 VNET_FEATURE_INIT (ip6_vxlan_bypass, static) =
543 .arc_name = "ip6-unicast",
544 .node_name = "ip6-vxlan-bypass",
545 .runs_before = VNET_FEATURES ("ip6-lookup"),
548 VNET_FEATURE_INIT (ip6_not_enabled, static) =
550 .arc_name = "ip6-unicast",
551 .node_name = "ip6-not-enabled",
552 .runs_before = VNET_FEATURES ("ip6-lookup"),
555 VNET_FEATURE_INIT (ip6_lookup, static) =
557 .arc_name = "ip6-unicast",
558 .node_name = "ip6-lookup",
559 .runs_before = 0, /*last feature*/
562 /* Built-in ip6 multicast rx feature path definition (none now) */
563 VNET_FEATURE_ARC_INIT (ip6_multicast, static) =
565 .arc_name = "ip6-multicast",
566 .start_nodes = VNET_FEATURES ("ip6-input"),
567 .last_in_arc = "ip6-mfib-forward-lookup",
568 .arc_index_ptr = &ip6_main.lookup_main.mcast_feature_arc_index,
571 VNET_FEATURE_INIT (ip6_vpath_mc, static) = {
572 .arc_name = "ip6-multicast",
573 .node_name = "vpath-input-ip6",
574 .runs_before = VNET_FEATURES ("ip6-mfib-forward-lookup"),
577 VNET_FEATURE_INIT (ip6_not_enabled_mc, static) = {
578 .arc_name = "ip6-multicast",
579 .node_name = "ip6-not-enabled",
580 .runs_before = VNET_FEATURES ("ip6-mfib-forward-lookup"),
583 VNET_FEATURE_INIT (ip6_mc_lookup, static) = {
584 .arc_name = "ip6-multicast",
585 .node_name = "ip6-mfib-forward-lookup",
586 .runs_before = 0, /* last feature */
589 /* Built-in ip4 tx feature path definition */
590 VNET_FEATURE_ARC_INIT (ip6_output, static) =
592 .arc_name = "ip6-output",
593 .start_nodes = VNET_FEATURES ("ip6-rewrite", "ip6-midchain", "ip6-dvr-dpo"),
594 .last_in_arc = "interface-output",
595 .arc_index_ptr = &ip6_main.lookup_main.output_feature_arc_index,
598 VNET_FEATURE_INIT (ip6_outacl, static) = {
599 .arc_name = "ip6-output",
600 .node_name = "ip6-outacl",
601 .runs_before = VNET_FEATURES ("ipsec6-output-feature"),
604 VNET_FEATURE_INIT (ip6_ipsec_output, static) = {
605 .arc_name = "ip6-output",
606 .node_name = "ipsec6-output-feature",
607 .runs_before = VNET_FEATURES ("interface-output"),
610 VNET_FEATURE_INIT (ip6_interface_output, static) = {
611 .arc_name = "ip6-output",
612 .node_name = "interface-output",
613 .runs_before = 0, /* not before any other features */
617 static clib_error_t *
618 ip6_sw_interface_add_del (vnet_main_t * vnm, u32 sw_if_index, u32 is_add)
620 ip6_main_t *im = &ip6_main;
622 vec_validate (im->fib_index_by_sw_if_index, sw_if_index);
623 vec_validate (im->mfib_index_by_sw_if_index, sw_if_index);
627 /* Ensure that IPv6 is disabled */
628 ip6_main_t *im6 = &ip6_main;
629 ip_lookup_main_t *lm6 = &im6->lookup_main;
630 ip_interface_address_t *ia = 0;
631 ip6_address_t *address;
632 vlib_main_t *vm = vlib_get_main ();
634 vnet_sw_interface_update_unnumbered (sw_if_index, ~0, 0);
636 foreach_ip_interface_address (lm6, ia, sw_if_index, 0,
638 address = ip_interface_address_get_address (lm6, ia);
639 ip6_add_del_interface_address(vm, sw_if_index, address, ia->address_length, 1);
642 ip6_mfib_interface_enable_disable (sw_if_index, 0);
645 vnet_feature_enable_disable ("ip6-unicast", "ip6-not-enabled", sw_if_index,
648 vnet_feature_enable_disable ("ip6-multicast", "ip6-not-enabled",
649 sw_if_index, is_add, 0, 0);
651 return /* no error */ 0;
654 VNET_SW_INTERFACE_ADD_DEL_FUNCTION (ip6_sw_interface_add_del);
656 VLIB_NODE_FN (ip6_lookup_node) (vlib_main_t * vm,
657 vlib_node_runtime_t * node,
658 vlib_frame_t * frame)
660 return ip6_lookup_inline (vm, node, frame);
663 static u8 *format_ip6_lookup_trace (u8 * s, va_list * args);
666 VLIB_REGISTER_NODE (ip6_lookup_node) =
668 .name = "ip6-lookup",
669 .vector_size = sizeof (u32),
670 .format_trace = format_ip6_lookup_trace,
671 .n_next_nodes = IP6_LOOKUP_N_NEXT,
672 .next_nodes = IP6_LOOKUP_NEXT_NODES,
676 VLIB_NODE_FN (ip6_load_balance_node) (vlib_main_t * vm,
677 vlib_node_runtime_t * node,
678 vlib_frame_t * frame)
680 vlib_combined_counter_main_t *cm = &load_balance_main.lbm_via_counters;
682 u32 thread_index = vm->thread_index;
683 ip6_main_t *im = &ip6_main;
684 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs;
685 u16 nexts[VLIB_FRAME_SIZE], *next;
687 from = vlib_frame_vector_args (frame);
688 n_left = frame->n_vectors;
691 vlib_get_buffers (vm, from, bufs, n_left);
695 const load_balance_t *lb0, *lb1;
696 const ip6_header_t *ip0, *ip1;
697 u32 lbi0, hc0, lbi1, hc1;
698 const dpo_id_t *dpo0, *dpo1;
700 /* Prefetch next iteration. */
702 vlib_prefetch_buffer_header (b[2], STORE);
703 vlib_prefetch_buffer_header (b[3], STORE);
705 CLIB_PREFETCH (b[2]->data, sizeof (ip0[0]), STORE);
706 CLIB_PREFETCH (b[3]->data, sizeof (ip0[0]), STORE);
709 ip0 = vlib_buffer_get_current (b[0]);
710 ip1 = vlib_buffer_get_current (b[1]);
711 lbi0 = vnet_buffer (b[0])->ip.adj_index[VLIB_TX];
712 lbi1 = vnet_buffer (b[1])->ip.adj_index[VLIB_TX];
714 lb0 = load_balance_get (lbi0);
715 lb1 = load_balance_get (lbi1);
718 * this node is for via FIBs we can re-use the hash value from the
719 * to node if present.
720 * We don't want to use the same hash value at each level in the recursion
721 * graph as that would lead to polarisation
725 if (PREDICT_FALSE (lb0->lb_n_buckets > 1))
727 if (PREDICT_TRUE (vnet_buffer (b[0])->ip.flow_hash))
729 hc0 = vnet_buffer (b[0])->ip.flow_hash =
730 vnet_buffer (b[0])->ip.flow_hash >> 1;
734 hc0 = vnet_buffer (b[0])->ip.flow_hash =
735 ip6_compute_flow_hash (ip0, lb0->lb_hash_config);
737 dpo0 = load_balance_get_fwd_bucket
738 (lb0, (hc0 & (lb0->lb_n_buckets_minus_1)));
742 dpo0 = load_balance_get_bucket_i (lb0, 0);
744 if (PREDICT_FALSE (lb1->lb_n_buckets > 1))
746 if (PREDICT_TRUE (vnet_buffer (b[1])->ip.flow_hash))
748 hc1 = vnet_buffer (b[1])->ip.flow_hash =
749 vnet_buffer (b[1])->ip.flow_hash >> 1;
753 hc1 = vnet_buffer (b[1])->ip.flow_hash =
754 ip6_compute_flow_hash (ip1, lb1->lb_hash_config);
756 dpo1 = load_balance_get_fwd_bucket
757 (lb1, (hc1 & (lb1->lb_n_buckets_minus_1)));
761 dpo1 = load_balance_get_bucket_i (lb1, 0);
764 next[0] = dpo0->dpoi_next_node;
765 next[1] = dpo1->dpoi_next_node;
767 /* Only process the HBH Option Header if explicitly configured to do so */
768 if (PREDICT_FALSE (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
770 next[0] = (dpo_is_adj (dpo0) && im->hbh_enabled) ?
771 (ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next[0];
773 /* Only process the HBH Option Header if explicitly configured to do so */
774 if (PREDICT_FALSE (ip1->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
776 next[1] = (dpo_is_adj (dpo1) && im->hbh_enabled) ?
777 (ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next[1];
780 vnet_buffer (b[0])->ip.adj_index[VLIB_TX] = dpo0->dpoi_index;
781 vnet_buffer (b[1])->ip.adj_index[VLIB_TX] = dpo1->dpoi_index;
783 vlib_increment_combined_counter
784 (cm, thread_index, lbi0, 1, vlib_buffer_length_in_chain (vm, b[0]));
785 vlib_increment_combined_counter
786 (cm, thread_index, lbi1, 1, vlib_buffer_length_in_chain (vm, b[1]));
795 const load_balance_t *lb0;
796 const ip6_header_t *ip0;
797 const dpo_id_t *dpo0;
800 ip0 = vlib_buffer_get_current (b[0]);
801 lbi0 = vnet_buffer (b[0])->ip.adj_index[VLIB_TX];
803 lb0 = load_balance_get (lbi0);
806 if (PREDICT_FALSE (lb0->lb_n_buckets > 1))
808 if (PREDICT_TRUE (vnet_buffer (b[0])->ip.flow_hash))
810 hc0 = vnet_buffer (b[0])->ip.flow_hash =
811 vnet_buffer (b[0])->ip.flow_hash >> 1;
815 hc0 = vnet_buffer (b[0])->ip.flow_hash =
816 ip6_compute_flow_hash (ip0, lb0->lb_hash_config);
818 dpo0 = load_balance_get_fwd_bucket
819 (lb0, (hc0 & (lb0->lb_n_buckets_minus_1)));
823 dpo0 = load_balance_get_bucket_i (lb0, 0);
826 next[0] = dpo0->dpoi_next_node;
827 vnet_buffer (b[0])->ip.adj_index[VLIB_TX] = dpo0->dpoi_index;
829 /* Only process the HBH Option Header if explicitly configured to do so */
830 if (PREDICT_FALSE (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
832 next[0] = (dpo_is_adj (dpo0) && im->hbh_enabled) ?
833 (ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next[0];
836 vlib_increment_combined_counter
837 (cm, thread_index, lbi0, 1, vlib_buffer_length_in_chain (vm, b[0]));
844 vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors);
846 if (node->flags & VLIB_NODE_FLAG_TRACE)
847 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
849 return frame->n_vectors;
853 VLIB_REGISTER_NODE (ip6_load_balance_node) =
855 .name = "ip6-load-balance",
856 .vector_size = sizeof (u32),
857 .sibling_of = "ip6-lookup",
858 .format_trace = format_ip6_lookup_trace,
864 /* Adjacency taken. */
869 /* Packet data, possibly *after* rewrite. */
870 u8 packet_data[128 - 1 * sizeof (u32)];
872 ip6_forward_next_trace_t;
874 #ifndef CLIB_MARCH_VARIANT
876 format_ip6_forward_next_trace (u8 * s, va_list * args)
878 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
879 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
880 ip6_forward_next_trace_t *t = va_arg (*args, ip6_forward_next_trace_t *);
881 u32 indent = format_get_indent (s);
883 s = format (s, "%U%U",
884 format_white_space, indent,
885 format_ip6_header, t->packet_data, sizeof (t->packet_data));
891 format_ip6_lookup_trace (u8 * s, va_list * args)
893 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
894 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
895 ip6_forward_next_trace_t *t = va_arg (*args, ip6_forward_next_trace_t *);
896 u32 indent = format_get_indent (s);
898 s = format (s, "fib %d dpo-idx %d flow hash: 0x%08x",
899 t->fib_index, t->adj_index, t->flow_hash);
900 s = format (s, "\n%U%U",
901 format_white_space, indent,
902 format_ip6_header, t->packet_data, sizeof (t->packet_data));
908 format_ip6_rewrite_trace (u8 * s, va_list * args)
910 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
911 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
912 ip6_forward_next_trace_t *t = va_arg (*args, ip6_forward_next_trace_t *);
913 u32 indent = format_get_indent (s);
915 s = format (s, "tx_sw_if_index %d adj-idx %d : %U flow hash: 0x%08x",
916 t->fib_index, t->adj_index, format_ip_adjacency,
917 t->adj_index, FORMAT_IP_ADJACENCY_NONE, t->flow_hash);
918 s = format (s, "\n%U%U",
919 format_white_space, indent,
920 format_ip_adjacency_packet_data,
921 t->packet_data, sizeof (t->packet_data));
925 /* Common trace function for all ip6-forward next nodes. */
926 #ifndef CLIB_MARCH_VARIANT
928 ip6_forward_next_trace (vlib_main_t * vm,
929 vlib_node_runtime_t * node,
930 vlib_frame_t * frame, vlib_rx_or_tx_t which_adj_index)
933 ip6_main_t *im = &ip6_main;
935 n_left = frame->n_vectors;
936 from = vlib_frame_vector_args (frame);
941 vlib_buffer_t *b0, *b1;
942 ip6_forward_next_trace_t *t0, *t1;
944 /* Prefetch next iteration. */
945 vlib_prefetch_buffer_with_index (vm, from[2], LOAD);
946 vlib_prefetch_buffer_with_index (vm, from[3], LOAD);
951 b0 = vlib_get_buffer (vm, bi0);
952 b1 = vlib_get_buffer (vm, bi1);
954 if (b0->flags & VLIB_BUFFER_IS_TRACED)
956 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
957 t0->adj_index = vnet_buffer (b0)->ip.adj_index[which_adj_index];
958 t0->flow_hash = vnet_buffer (b0)->ip.flow_hash;
960 (vnet_buffer (b0)->sw_if_index[VLIB_TX] !=
961 (u32) ~ 0) ? vnet_buffer (b0)->sw_if_index[VLIB_TX] :
962 vec_elt (im->fib_index_by_sw_if_index,
963 vnet_buffer (b0)->sw_if_index[VLIB_RX]);
965 clib_memcpy_fast (t0->packet_data,
966 vlib_buffer_get_current (b0),
967 sizeof (t0->packet_data));
969 if (b1->flags & VLIB_BUFFER_IS_TRACED)
971 t1 = vlib_add_trace (vm, node, b1, sizeof (t1[0]));
972 t1->adj_index = vnet_buffer (b1)->ip.adj_index[which_adj_index];
973 t1->flow_hash = vnet_buffer (b1)->ip.flow_hash;
975 (vnet_buffer (b1)->sw_if_index[VLIB_TX] !=
976 (u32) ~ 0) ? vnet_buffer (b1)->sw_if_index[VLIB_TX] :
977 vec_elt (im->fib_index_by_sw_if_index,
978 vnet_buffer (b1)->sw_if_index[VLIB_RX]);
980 clib_memcpy_fast (t1->packet_data,
981 vlib_buffer_get_current (b1),
982 sizeof (t1->packet_data));
992 ip6_forward_next_trace_t *t0;
996 b0 = vlib_get_buffer (vm, bi0);
998 if (b0->flags & VLIB_BUFFER_IS_TRACED)
1000 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
1001 t0->adj_index = vnet_buffer (b0)->ip.adj_index[which_adj_index];
1002 t0->flow_hash = vnet_buffer (b0)->ip.flow_hash;
1004 (vnet_buffer (b0)->sw_if_index[VLIB_TX] !=
1005 (u32) ~ 0) ? vnet_buffer (b0)->sw_if_index[VLIB_TX] :
1006 vec_elt (im->fib_index_by_sw_if_index,
1007 vnet_buffer (b0)->sw_if_index[VLIB_RX]);
1009 clib_memcpy_fast (t0->packet_data,
1010 vlib_buffer_get_current (b0),
1011 sizeof (t0->packet_data));
1018 /* Compute TCP/UDP/ICMP6 checksum in software. */
1020 ip6_tcp_udp_icmp_compute_checksum (vlib_main_t * vm, vlib_buffer_t * p0,
1021 ip6_header_t * ip0, int *bogus_lengthp)
1024 u16 payload_length_host_byte_order;
1026 u32 headers_size = sizeof (ip0[0]);
1027 u8 *data_this_buffer;
1029 ASSERT (bogus_lengthp);
1032 /* Initialize checksum with ip header. */
1033 sum0 = ip0->payload_length + clib_host_to_net_u16 (ip0->protocol);
1034 payload_length_host_byte_order = clib_net_to_host_u16 (ip0->payload_length);
1035 data_this_buffer = (u8 *) (ip0 + 1);
1037 for (i = 0; i < ARRAY_LEN (ip0->src_address.as_uword); i++)
1039 sum0 = ip_csum_with_carry
1040 (sum0, clib_mem_unaligned (&ip0->src_address.as_uword[i], uword));
1041 sum0 = ip_csum_with_carry
1042 (sum0, clib_mem_unaligned (&ip0->dst_address.as_uword[i], uword));
1045 /* some icmp packets may come with a "router alert" hop-by-hop extension header (e.g., mldv2 packets)
1046 * or UDP-Ping packets */
1047 if (PREDICT_FALSE (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
1050 ip6_hop_by_hop_ext_t *ext_hdr =
1051 (ip6_hop_by_hop_ext_t *) data_this_buffer;
1053 /* validate really icmp6 next */
1054 ASSERT ((ext_hdr->next_hdr == IP_PROTOCOL_ICMP6)
1055 || (ext_hdr->next_hdr == IP_PROTOCOL_UDP));
1057 skip_bytes = 8 * (1 + ext_hdr->n_data_u64s);
1058 data_this_buffer = (void *) ((u8 *) data_this_buffer + skip_bytes);
1060 payload_length_host_byte_order -= skip_bytes;
1061 headers_size += skip_bytes;
1065 return ip_calculate_l4_checksum (vm, p0, sum0,
1066 payload_length_host_byte_order,
1067 (u8 *) ip0, headers_size, NULL);
1069 return ip_calculate_l4_checksum (vm, 0, sum0,
1070 payload_length_host_byte_order, NULL, 0,
1075 ip6_tcp_udp_icmp_validate_checksum (vlib_main_t * vm, vlib_buffer_t * p0)
1077 ip6_header_t *ip0 = vlib_buffer_get_current (p0);
1082 /* some icmp packets may come with a "router alert" hop-by-hop extension header (e.g., mldv2 packets) */
1083 ASSERT (ip0->protocol == IP_PROTOCOL_TCP
1084 || ip0->protocol == IP_PROTOCOL_ICMP6
1085 || ip0->protocol == IP_PROTOCOL_UDP
1086 || ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS);
1088 udp0 = (void *) (ip0 + 1);
1089 if (ip0->protocol == IP_PROTOCOL_UDP && udp0->checksum == 0)
1091 p0->flags |= (VNET_BUFFER_F_L4_CHECKSUM_COMPUTED
1092 | VNET_BUFFER_F_L4_CHECKSUM_CORRECT);
1096 sum16 = ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip0, &bogus_length);
1098 p0->flags |= (VNET_BUFFER_F_L4_CHECKSUM_COMPUTED
1099 | ((sum16 == 0) << VNET_BUFFER_F_LOG2_L4_CHECKSUM_CORRECT));
1106 * @brief returns number of links on which src is reachable.
1109 ip6_urpf_loose_check (ip6_main_t * im, vlib_buffer_t * b, ip6_header_t * i)
1111 const load_balance_t *lb0;
1115 fib_index = vec_elt (im->fib_index_by_sw_if_index,
1116 vnet_buffer (b)->sw_if_index[VLIB_RX]);
1118 (vnet_buffer (b)->sw_if_index[VLIB_TX] == (u32) ~ 0) ?
1119 fib_index : vnet_buffer (b)->sw_if_index[VLIB_TX];
1121 lbi = ip6_fib_table_fwding_lookup (fib_index, &i->src_address);
1122 lb0 = load_balance_get (lbi);
1124 return (fib_urpf_check_size (lb0->lb_urpf));
1128 ip6_next_proto_is_tcp_udp (vlib_buffer_t * p0, ip6_header_t * ip0,
1132 proto0 = ip6_locate_header (p0, ip0, IP_PROTOCOL_UDP, udp_offset0);
1133 if (proto0 != IP_PROTOCOL_UDP)
1135 proto0 = ip6_locate_header (p0, ip0, IP_PROTOCOL_TCP, udp_offset0);
1136 proto0 = (proto0 == IP_PROTOCOL_TCP) ? proto0 : 0;
1142 VNET_FEATURE_ARC_INIT (ip6_local) =
1144 .arc_name = "ip6-local",
1145 .start_nodes = VNET_FEATURES ("ip6-local"),
1149 static_always_inline u8
1150 ip6_tcp_udp_icmp_bad_length (vlib_main_t * vm, vlib_buffer_t * p0)
1153 u16 payload_length_host_byte_order;
1154 u32 n_this_buffer, n_bytes_left;
1155 ip6_header_t *ip0 = vlib_buffer_get_current (p0);
1156 u32 headers_size = sizeof (ip0[0]);
1157 u8 *data_this_buffer;
1160 data_this_buffer = (u8 *) (ip0 + 1);
1162 ip6_hop_by_hop_ext_t *ext_hdr = (ip6_hop_by_hop_ext_t *) data_this_buffer;
1164 /* validate really icmp6 next */
1166 if (!(ext_hdr->next_hdr == IP_PROTOCOL_ICMP6)
1167 || (ext_hdr->next_hdr == IP_PROTOCOL_UDP))
1171 payload_length_host_byte_order = clib_net_to_host_u16 (ip0->payload_length);
1172 n_bytes_left = n_this_buffer = payload_length_host_byte_order;
1175 u32 n_ip_bytes_this_buffer =
1176 p0->current_length - (((u8 *) ip0 - p0->data) - p0->current_data);
1177 if (n_this_buffer + headers_size > n_ip_bytes_this_buffer)
1179 n_this_buffer = p0->current_length > headers_size ?
1180 n_ip_bytes_this_buffer - headers_size : 0;
1183 n_bytes_left -= n_this_buffer;
1184 n_bytes_left -= p0->total_length_not_including_first_buffer;
1186 if (n_bytes_left == 0)
1194 ip6_local_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
1195 vlib_frame_t * frame, int head_of_feature_arc)
1197 ip6_main_t *im = &ip6_main;
1198 ip_lookup_main_t *lm = &im->lookup_main;
1199 u32 *from, n_left_from;
1200 vlib_node_runtime_t *error_node =
1201 vlib_node_get_runtime (vm, ip6_input_node.index);
1202 u8 arc_index = vnet_feat_arc_ip6_local.feature_arc_index;
1203 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
1204 u16 nexts[VLIB_FRAME_SIZE], *next;
1206 from = vlib_frame_vector_args (frame);
1207 n_left_from = frame->n_vectors;
1209 if (node->flags & VLIB_NODE_FLAG_TRACE)
1210 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
1212 vlib_get_buffers (vm, from, bufs, n_left_from);
1216 while (n_left_from > 2)
1218 /* Prefetch next iteration. */
1219 if (n_left_from >= 6)
1221 vlib_prefetch_buffer_header (b[4], STORE);
1222 vlib_prefetch_buffer_header (b[5], STORE);
1223 vlib_prefetch_buffer_data (b[2], LOAD);
1224 vlib_prefetch_buffer_data (b[3], LOAD);
1228 error[0] = IP6_ERROR_UNKNOWN_PROTOCOL;
1229 error[1] = IP6_ERROR_UNKNOWN_PROTOCOL;
1231 ip6_header_t *ip[2];
1232 ip[0] = vlib_buffer_get_current (b[0]);
1233 ip[1] = vlib_buffer_get_current (b[1]);
1235 if (head_of_feature_arc)
1237 vnet_buffer (b[0])->l3_hdr_offset = b[0]->current_data;
1238 vnet_buffer (b[1])->l3_hdr_offset = b[1]->current_data;
1241 type[0] = lm->builtin_protocol_by_ip_protocol[ip[0]->protocol];
1242 type[1] = lm->builtin_protocol_by_ip_protocol[ip[1]->protocol];
1245 flags[0] = b[0]->flags;
1246 flags[1] = b[1]->flags;
1248 u32 good_l4_csum[2];
1250 flags[0] & (VNET_BUFFER_F_L4_CHECKSUM_CORRECT |
1251 VNET_BUFFER_F_OFFLOAD_TCP_CKSUM |
1252 VNET_BUFFER_F_OFFLOAD_UDP_CKSUM);
1254 flags[1] & (VNET_BUFFER_F_L4_CHECKSUM_CORRECT |
1255 VNET_BUFFER_F_OFFLOAD_TCP_CKSUM |
1256 VNET_BUFFER_F_OFFLOAD_UDP_CKSUM);
1258 u32 udp_offset[2] = { };
1261 ip6_next_proto_is_tcp_udp (b[0], ip[0], &udp_offset[0]);
1263 ip6_next_proto_is_tcp_udp (b[1], ip[1], &udp_offset[1]);
1264 i16 len_diff[2] = { 0 };
1265 if (PREDICT_TRUE (is_tcp_udp[0]))
1268 (udp_header_t *) ((u8 *) ip[0] + udp_offset[0]);
1269 good_l4_csum[0] |= type[0] == IP_BUILTIN_PROTOCOL_UDP
1270 && udp->checksum == 0;
1271 /* optimistically verify UDP length. */
1272 u16 ip_len, udp_len;
1273 ip_len = clib_net_to_host_u16 (ip[0]->payload_length);
1274 udp_len = clib_net_to_host_u16 (udp->length);
1275 len_diff[0] = ip_len - udp_len;
1277 if (PREDICT_TRUE (is_tcp_udp[1]))
1280 (udp_header_t *) ((u8 *) ip[1] + udp_offset[1]);
1281 good_l4_csum[1] |= type[1] == IP_BUILTIN_PROTOCOL_UDP
1282 && udp->checksum == 0;
1283 /* optimistically verify UDP length. */
1284 u16 ip_len, udp_len;
1285 ip_len = clib_net_to_host_u16 (ip[1]->payload_length);
1286 udp_len = clib_net_to_host_u16 (udp->length);
1287 len_diff[1] = ip_len - udp_len;
1290 good_l4_csum[0] |= type[0] == IP_BUILTIN_PROTOCOL_UNKNOWN;
1291 good_l4_csum[1] |= type[1] == IP_BUILTIN_PROTOCOL_UNKNOWN;
1293 len_diff[0] = type[0] == IP_BUILTIN_PROTOCOL_UDP ? len_diff[0] : 0;
1294 len_diff[1] = type[1] == IP_BUILTIN_PROTOCOL_UDP ? len_diff[1] : 0;
1297 need_csum[0] = type[0] != IP_BUILTIN_PROTOCOL_UNKNOWN
1299 && !(flags[0] & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED);
1300 need_csum[1] = type[1] != IP_BUILTIN_PROTOCOL_UNKNOWN
1302 && !(flags[1] & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED);
1303 if (PREDICT_FALSE (need_csum[0]))
1305 flags[0] = ip6_tcp_udp_icmp_validate_checksum (vm, b[0]);
1306 good_l4_csum[0] = flags[0] & VNET_BUFFER_F_L4_CHECKSUM_CORRECT;
1307 error[0] = IP6_ERROR_UNKNOWN_PROTOCOL;
1311 if (ip6_tcp_udp_icmp_bad_length (vm, b[0]))
1312 error[0] = IP6_ERROR_BAD_LENGTH;
1314 if (PREDICT_FALSE (need_csum[1]))
1316 flags[1] = ip6_tcp_udp_icmp_validate_checksum (vm, b[1]);
1317 good_l4_csum[1] = flags[1] & VNET_BUFFER_F_L4_CHECKSUM_CORRECT;
1318 error[1] = IP6_ERROR_UNKNOWN_PROTOCOL;
1322 if (ip6_tcp_udp_icmp_bad_length (vm, b[1]))
1323 error[1] = IP6_ERROR_BAD_LENGTH;
1327 error[0] = len_diff[0] < 0 ? IP6_ERROR_UDP_LENGTH : error[0];
1329 error[1] = len_diff[1] < 0 ? IP6_ERROR_UDP_LENGTH : error[1];
1331 STATIC_ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_UDP ==
1332 IP6_ERROR_UDP_CHECKSUM,
1333 "Wrong IP6 errors constants");
1334 STATIC_ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_ICMP ==
1335 IP6_ERROR_ICMP_CHECKSUM,
1336 "Wrong IP6 errors constants");
1339 !good_l4_csum[0] ? IP6_ERROR_UDP_CHECKSUM + type[0] : error[0];
1341 !good_l4_csum[1] ? IP6_ERROR_UDP_CHECKSUM + type[1] : error[1];
1343 /* Drop packets from unroutable hosts. */
1344 /* If this is a neighbor solicitation (ICMP), skip source RPF check */
1346 unroutable[0] = error[0] == IP6_ERROR_UNKNOWN_PROTOCOL
1347 && type[0] != IP_BUILTIN_PROTOCOL_ICMP
1348 && !ip6_address_is_link_local_unicast (&ip[0]->src_address);
1349 unroutable[1] = error[1] == IP6_ERROR_UNKNOWN_PROTOCOL
1350 && type[1] != IP_BUILTIN_PROTOCOL_ICMP
1351 && !ip6_address_is_link_local_unicast (&ip[1]->src_address);
1352 if (PREDICT_FALSE (unroutable[0]))
1355 !ip6_urpf_loose_check (im, b[0],
1356 ip[0]) ? IP6_ERROR_SRC_LOOKUP_MISS
1359 if (PREDICT_FALSE (unroutable[1]))
1362 !ip6_urpf_loose_check (im, b[1],
1363 ip[1]) ? IP6_ERROR_SRC_LOOKUP_MISS
1367 vnet_buffer (b[0])->ip.fib_index =
1368 vnet_buffer (b[0])->sw_if_index[VLIB_TX] != ~0 ?
1369 vnet_buffer (b[0])->sw_if_index[VLIB_TX] :
1370 vnet_buffer (b[0])->ip.fib_index;
1371 vnet_buffer (b[1])->ip.fib_index =
1372 vnet_buffer (b[1])->sw_if_index[VLIB_TX] != ~0 ?
1373 vnet_buffer (b[1])->sw_if_index[VLIB_TX] :
1374 vnet_buffer (b[1])->ip.fib_index;
1375 } /* head_of_feature_arc */
1377 next[0] = lm->local_next_by_ip_protocol[ip[0]->protocol];
1379 error[0] != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next[0];
1380 next[1] = lm->local_next_by_ip_protocol[ip[1]->protocol];
1382 error[1] != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next[1];
1384 b[0]->error = error_node->errors[0];
1385 b[1]->error = error_node->errors[1];
1387 if (head_of_feature_arc)
1390 ip6_unknown[0] = error[0] == (u8) IP6_ERROR_UNKNOWN_PROTOCOL;
1391 ip6_unknown[1] = error[1] == (u8) IP6_ERROR_UNKNOWN_PROTOCOL;
1392 if (PREDICT_TRUE (ip6_unknown[0]))
1394 u32 next32 = next[0];
1395 vnet_feature_arc_start (arc_index,
1396 vnet_buffer (b[0])->sw_if_index
1397 [VLIB_RX], &next32, b[0]);
1400 if (PREDICT_TRUE (ip6_unknown[1]))
1402 u32 next32 = next[1];
1403 vnet_feature_arc_start (arc_index,
1404 vnet_buffer (b[1])->sw_if_index
1405 [VLIB_RX], &next32, b[1]);
1419 error = IP6_ERROR_UNKNOWN_PROTOCOL;
1422 ip = vlib_buffer_get_current (b[0]);
1424 if (head_of_feature_arc)
1426 vnet_buffer (b[0])->l3_hdr_offset = b[0]->current_data;
1427 u8 type = lm->builtin_protocol_by_ip_protocol[ip->protocol];
1429 u32 flags = b[0]->flags;
1431 flags & (VNET_BUFFER_F_L4_CHECKSUM_CORRECT |
1432 VNET_BUFFER_F_OFFLOAD_TCP_CKSUM |
1433 VNET_BUFFER_F_OFFLOAD_UDP_CKSUM);
1437 u8 is_tcp_udp = ip6_next_proto_is_tcp_udp (b[0], ip, &udp_offset);
1438 if (PREDICT_TRUE (is_tcp_udp))
1440 udp_header_t *udp = (udp_header_t *) ((u8 *) ip + udp_offset);
1441 /* Don't verify UDP checksum for packets with explicit zero checksum. */
1442 good_l4_csum |= type == IP_BUILTIN_PROTOCOL_UDP
1443 && udp->checksum == 0;
1444 /* optimistically verify UDP length. */
1445 u16 ip_len, udp_len;
1446 ip_len = clib_net_to_host_u16 (ip->payload_length);
1447 udp_len = clib_net_to_host_u16 (udp->length);
1448 len_diff = ip_len - udp_len;
1451 good_l4_csum |= type == IP_BUILTIN_PROTOCOL_UNKNOWN;
1452 len_diff = type == IP_BUILTIN_PROTOCOL_UDP ? len_diff : 0;
1454 u8 need_csum = type != IP_BUILTIN_PROTOCOL_UNKNOWN && !good_l4_csum
1455 && !(flags & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED);
1456 if (PREDICT_FALSE (need_csum))
1458 flags = ip6_tcp_udp_icmp_validate_checksum (vm, b[0]);
1459 good_l4_csum = flags & VNET_BUFFER_F_L4_CHECKSUM_CORRECT;
1460 error = IP6_ERROR_UNKNOWN_PROTOCOL;
1464 if (ip6_tcp_udp_icmp_bad_length (vm, b[0]))
1465 error = IP6_ERROR_BAD_LENGTH;
1470 error = len_diff < 0 ? IP6_ERROR_UDP_LENGTH : error;
1472 STATIC_ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_UDP ==
1473 IP6_ERROR_UDP_CHECKSUM,
1474 "Wrong IP6 errors constants");
1475 STATIC_ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_ICMP ==
1476 IP6_ERROR_ICMP_CHECKSUM,
1477 "Wrong IP6 errors constants");
1479 error = !good_l4_csum ? IP6_ERROR_UDP_CHECKSUM + type : error;
1481 /* Drop packets from unroutable hosts. */
1482 /* If this is a neighbor solicitation (ICMP), skip source RPF check */
1483 u8 unroutable = error == IP6_ERROR_UNKNOWN_PROTOCOL
1484 && type != IP_BUILTIN_PROTOCOL_ICMP
1485 && !ip6_address_is_link_local_unicast (&ip->src_address);
1486 if (PREDICT_FALSE (unroutable))
1489 !ip6_urpf_loose_check (im, b[0],
1490 ip) ? IP6_ERROR_SRC_LOOKUP_MISS :
1494 vnet_buffer (b[0])->ip.fib_index =
1495 vnet_buffer (b[0])->sw_if_index[VLIB_TX] != ~0 ?
1496 vnet_buffer (b[0])->sw_if_index[VLIB_TX] :
1497 vnet_buffer (b[0])->ip.fib_index;
1498 } /* head_of_feature_arc */
1500 next[0] = lm->local_next_by_ip_protocol[ip->protocol];
1502 error != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next[0];
1504 b[0]->error = error_node->errors[0];
1506 if (head_of_feature_arc)
1508 if (PREDICT_TRUE (error == (u8) IP6_ERROR_UNKNOWN_PROTOCOL))
1510 u32 next32 = next[0];
1511 vnet_feature_arc_start (arc_index,
1512 vnet_buffer (b[0])->sw_if_index
1513 [VLIB_RX], &next32, b[0]);
1524 vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors);
1525 return frame->n_vectors;
1528 VLIB_NODE_FN (ip6_local_node) (vlib_main_t * vm, vlib_node_runtime_t * node,
1529 vlib_frame_t * frame)
1531 return ip6_local_inline (vm, node, frame, 1 /* head of feature arc */ );
1535 VLIB_REGISTER_NODE (ip6_local_node) =
1537 .name = "ip6-local",
1538 .vector_size = sizeof (u32),
1539 .format_trace = format_ip6_forward_next_trace,
1540 .n_next_nodes = IP_LOCAL_N_NEXT,
1543 [IP_LOCAL_NEXT_DROP] = "ip6-drop",
1544 [IP_LOCAL_NEXT_PUNT] = "ip6-punt",
1545 [IP_LOCAL_NEXT_UDP_LOOKUP] = "ip6-udp-lookup",
1546 [IP_LOCAL_NEXT_ICMP] = "ip6-icmp-input",
1547 [IP_LOCAL_NEXT_REASSEMBLY] = "ip6-full-reassembly",
1552 VLIB_NODE_FN (ip6_local_end_of_arc_node) (vlib_main_t * vm,
1553 vlib_node_runtime_t * node,
1554 vlib_frame_t * frame)
1556 return ip6_local_inline (vm, node, frame, 0 /* head of feature arc */ );
1560 VLIB_REGISTER_NODE (ip6_local_end_of_arc_node) = {
1561 .name = "ip6-local-end-of-arc",
1562 .vector_size = sizeof (u32),
1564 .format_trace = format_ip6_forward_next_trace,
1565 .sibling_of = "ip6-local",
1568 VNET_FEATURE_INIT (ip6_local_end_of_arc, static) = {
1569 .arc_name = "ip6-local",
1570 .node_name = "ip6-local-end-of-arc",
1571 .runs_before = 0, /* not before any other features */
1575 #ifdef CLIB_MARCH_VARIANT
1576 extern vlib_node_registration_t ip6_local_node;
1579 ip6_register_protocol (u32 protocol, u32 node_index)
1581 vlib_main_t *vm = vlib_get_main ();
1582 ip6_main_t *im = &ip6_main;
1583 ip_lookup_main_t *lm = &im->lookup_main;
1585 ASSERT (protocol < ARRAY_LEN (lm->local_next_by_ip_protocol));
1586 lm->local_next_by_ip_protocol[protocol] =
1587 vlib_node_add_next (vm, ip6_local_node.index, node_index);
1591 ip6_unregister_protocol (u32 protocol)
1593 ip6_main_t *im = &ip6_main;
1594 ip_lookup_main_t *lm = &im->lookup_main;
1596 ASSERT (protocol < ARRAY_LEN (lm->local_next_by_ip_protocol));
1597 lm->local_next_by_ip_protocol[protocol] = IP_LOCAL_NEXT_PUNT;
1603 IP6_REWRITE_NEXT_DROP,
1604 IP6_REWRITE_NEXT_ICMP_ERROR,
1605 IP6_REWRITE_NEXT_FRAGMENT,
1606 IP6_REWRITE_N_NEXT /* Last */
1607 } ip6_rewrite_next_t;
1610 * This bits of an IPv6 address to mask to construct a multicast
1613 #define IP6_MCAST_ADDR_MASK 0xffffffff
1616 ip6_mtu_check (vlib_buffer_t * b, u16 packet_bytes,
1617 u16 adj_packet_bytes, bool is_locally_generated,
1618 u32 * next, u8 is_midchain, u32 * error)
1620 if (adj_packet_bytes >= 1280 && packet_bytes > adj_packet_bytes)
1622 if (is_locally_generated)
1624 /* IP fragmentation */
1625 ip_frag_set_vnet_buffer (b, adj_packet_bytes,
1627 IP_FRAG_NEXT_IP_REWRITE_MIDCHAIN :
1628 IP_FRAG_NEXT_IP_REWRITE), 0);
1629 *next = IP6_REWRITE_NEXT_FRAGMENT;
1630 *error = IP6_ERROR_MTU_EXCEEDED;
1634 *error = IP6_ERROR_MTU_EXCEEDED;
1635 icmp6_error_set_vnet_buffer (b, ICMP6_packet_too_big, 0,
1637 *next = IP6_REWRITE_NEXT_ICMP_ERROR;
1643 ip6_rewrite_inline_with_gso (vlib_main_t * vm,
1644 vlib_node_runtime_t * node,
1645 vlib_frame_t * frame,
1646 int do_counters, int is_midchain, int is_mcast)
1648 ip_lookup_main_t *lm = &ip6_main.lookup_main;
1649 u32 *from = vlib_frame_vector_args (frame);
1650 u32 n_left_from, n_left_to_next, *to_next, next_index;
1651 vlib_node_runtime_t *error_node =
1652 vlib_node_get_runtime (vm, ip6_input_node.index);
1654 n_left_from = frame->n_vectors;
1655 next_index = node->cached_next_index;
1656 u32 thread_index = vm->thread_index;
1658 while (n_left_from > 0)
1660 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1662 while (n_left_from >= 4 && n_left_to_next >= 2)
1664 const ip_adjacency_t *adj0, *adj1;
1665 vlib_buffer_t *p0, *p1;
1666 ip6_header_t *ip0, *ip1;
1667 u32 pi0, rw_len0, next0, error0, adj_index0;
1668 u32 pi1, rw_len1, next1, error1, adj_index1;
1669 u32 tx_sw_if_index0, tx_sw_if_index1;
1670 bool is_locally_originated0, is_locally_originated1;
1672 /* Prefetch next iteration. */
1674 vlib_buffer_t *p2, *p3;
1676 p2 = vlib_get_buffer (vm, from[2]);
1677 p3 = vlib_get_buffer (vm, from[3]);
1679 vlib_prefetch_buffer_header (p2, LOAD);
1680 vlib_prefetch_buffer_header (p3, LOAD);
1682 CLIB_PREFETCH (p2->pre_data, 32, STORE);
1683 CLIB_PREFETCH (p3->pre_data, 32, STORE);
1685 CLIB_PREFETCH (p2->data, sizeof (ip0[0]), STORE);
1686 CLIB_PREFETCH (p3->data, sizeof (ip0[0]), STORE);
1689 pi0 = to_next[0] = from[0];
1690 pi1 = to_next[1] = from[1];
1695 n_left_to_next -= 2;
1697 p0 = vlib_get_buffer (vm, pi0);
1698 p1 = vlib_get_buffer (vm, pi1);
1700 adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
1701 adj_index1 = vnet_buffer (p1)->ip.adj_index[VLIB_TX];
1703 ip0 = vlib_buffer_get_current (p0);
1704 ip1 = vlib_buffer_get_current (p1);
1706 error0 = error1 = IP6_ERROR_NONE;
1707 next0 = next1 = IP6_REWRITE_NEXT_DROP;
1709 is_locally_originated0 =
1710 p0->flags & VNET_BUFFER_F_LOCALLY_ORIGINATED;
1711 if (PREDICT_TRUE (!is_locally_originated0))
1713 i32 hop_limit0 = ip0->hop_limit;
1715 /* Input node should have reject packets with hop limit 0. */
1716 ASSERT (ip0->hop_limit > 0);
1720 ip0->hop_limit = hop_limit0;
1723 * If the hop count drops below 1 when forwarding, generate
1726 if (PREDICT_FALSE (hop_limit0 <= 0))
1728 error0 = IP6_ERROR_TIME_EXPIRED;
1729 next0 = IP6_REWRITE_NEXT_ICMP_ERROR;
1730 vnet_buffer (p0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
1731 icmp6_error_set_vnet_buffer (p0, ICMP6_time_exceeded,
1732 ICMP6_time_exceeded_ttl_exceeded_in_transit,
1738 p0->flags &= ~VNET_BUFFER_F_LOCALLY_ORIGINATED;
1740 is_locally_originated1 =
1741 p1->flags & VNET_BUFFER_F_LOCALLY_ORIGINATED;
1742 if (PREDICT_TRUE (!is_locally_originated1))
1744 i32 hop_limit1 = ip1->hop_limit;
1746 /* Input node should have reject packets with hop limit 0. */
1747 ASSERT (ip1->hop_limit > 0);
1751 ip1->hop_limit = hop_limit1;
1754 * If the hop count drops below 1 when forwarding, generate
1757 if (PREDICT_FALSE (hop_limit1 <= 0))
1759 error1 = IP6_ERROR_TIME_EXPIRED;
1760 next1 = IP6_REWRITE_NEXT_ICMP_ERROR;
1761 vnet_buffer (p1)->sw_if_index[VLIB_TX] = (u32) ~ 0;
1762 icmp6_error_set_vnet_buffer (p1, ICMP6_time_exceeded,
1763 ICMP6_time_exceeded_ttl_exceeded_in_transit,
1769 p1->flags &= ~VNET_BUFFER_F_LOCALLY_ORIGINATED;
1771 adj0 = adj_get (adj_index0);
1772 adj1 = adj_get (adj_index1);
1774 rw_len0 = adj0[0].rewrite_header.data_bytes;
1775 rw_len1 = adj1[0].rewrite_header.data_bytes;
1776 vnet_buffer (p0)->ip.save_rewrite_length = rw_len0;
1777 vnet_buffer (p1)->ip.save_rewrite_length = rw_len1;
1781 vlib_increment_combined_counter
1782 (&adjacency_counters,
1783 thread_index, adj_index0, 1,
1784 vlib_buffer_length_in_chain (vm, p0) + rw_len0);
1785 vlib_increment_combined_counter
1786 (&adjacency_counters,
1787 thread_index, adj_index1, 1,
1788 vlib_buffer_length_in_chain (vm, p1) + rw_len1);
1791 /* Check MTU of outgoing interface. */
1793 clib_net_to_host_u16 (ip0->payload_length) +
1794 sizeof (ip6_header_t);
1796 clib_net_to_host_u16 (ip1->payload_length) +
1797 sizeof (ip6_header_t);
1798 if (p0->flags & VNET_BUFFER_F_GSO)
1799 ip0_len = gso_mtu_sz (p0);
1800 if (p1->flags & VNET_BUFFER_F_GSO)
1801 ip1_len = gso_mtu_sz (p1);
1805 ip6_mtu_check (p0, ip0_len,
1806 adj0[0].rewrite_header.max_l3_packet_bytes,
1807 is_locally_originated0, &next0, is_midchain,
1809 ip6_mtu_check (p1, ip1_len,
1810 adj1[0].rewrite_header.max_l3_packet_bytes,
1811 is_locally_originated1, &next1, is_midchain,
1814 /* Don't adjust the buffer for hop count issue; icmp-error node
1815 * wants to see the IP header */
1816 if (PREDICT_TRUE (error0 == IP6_ERROR_NONE))
1818 p0->current_data -= rw_len0;
1819 p0->current_length += rw_len0;
1821 tx_sw_if_index0 = adj0[0].rewrite_header.sw_if_index;
1822 vnet_buffer (p0)->sw_if_index[VLIB_TX] = tx_sw_if_index0;
1823 next0 = adj0[0].rewrite_header.next_index;
1826 (adj0[0].rewrite_header.flags & VNET_REWRITE_HAS_FEATURES))
1827 vnet_feature_arc_start (lm->output_feature_arc_index,
1828 tx_sw_if_index0, &next0, p0);
1832 p0->error = error_node->errors[error0];
1834 if (PREDICT_TRUE (error1 == IP6_ERROR_NONE))
1836 p1->current_data -= rw_len1;
1837 p1->current_length += rw_len1;
1839 tx_sw_if_index1 = adj1[0].rewrite_header.sw_if_index;
1840 vnet_buffer (p1)->sw_if_index[VLIB_TX] = tx_sw_if_index1;
1841 next1 = adj1[0].rewrite_header.next_index;
1844 (adj1[0].rewrite_header.flags & VNET_REWRITE_HAS_FEATURES))
1845 vnet_feature_arc_start (lm->output_feature_arc_index,
1846 tx_sw_if_index1, &next1, p1);
1850 p1->error = error_node->errors[error1];
1855 /* before we paint on the next header, update the L4
1856 * checksums if required, since there's no offload on a tunnel */
1857 calc_checksums (vm, p0);
1858 calc_checksums (vm, p1);
1861 /* Guess we are only writing on simple Ethernet header. */
1862 vnet_rewrite_two_headers (adj0[0], adj1[0],
1863 ip0, ip1, sizeof (ethernet_header_t));
1867 if (adj0->sub_type.midchain.fixup_func)
1868 adj0->sub_type.midchain.fixup_func
1869 (vm, adj0, p0, adj0->sub_type.midchain.fixup_data);
1870 if (adj1->sub_type.midchain.fixup_func)
1871 adj1->sub_type.midchain.fixup_func
1872 (vm, adj1, p1, adj1->sub_type.midchain.fixup_data);
1877 * copy bytes from the IP address into the MAC rewrite
1879 vnet_ip_mcast_fixup_header (IP6_MCAST_ADDR_MASK,
1881 rewrite_header.dst_mcast_offset,
1882 &ip0->dst_address.as_u32[3],
1884 vnet_ip_mcast_fixup_header (IP6_MCAST_ADDR_MASK,
1886 rewrite_header.dst_mcast_offset,
1887 &ip1->dst_address.as_u32[3],
1891 vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
1892 to_next, n_left_to_next,
1893 pi0, pi1, next0, next1);
1896 while (n_left_from > 0 && n_left_to_next > 0)
1898 ip_adjacency_t *adj0;
1902 u32 adj_index0, next0, error0;
1903 u32 tx_sw_if_index0;
1904 bool is_locally_originated0;
1906 pi0 = to_next[0] = from[0];
1908 p0 = vlib_get_buffer (vm, pi0);
1910 adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
1912 adj0 = adj_get (adj_index0);
1914 ip0 = vlib_buffer_get_current (p0);
1916 error0 = IP6_ERROR_NONE;
1917 next0 = IP6_REWRITE_NEXT_DROP;
1919 /* Check hop limit */
1920 is_locally_originated0 =
1921 p0->flags & VNET_BUFFER_F_LOCALLY_ORIGINATED;
1922 if (PREDICT_TRUE (!is_locally_originated0))
1924 i32 hop_limit0 = ip0->hop_limit;
1926 ASSERT (ip0->hop_limit > 0);
1930 ip0->hop_limit = hop_limit0;
1932 if (PREDICT_FALSE (hop_limit0 <= 0))
1935 * If the hop count drops below 1 when forwarding, generate
1938 error0 = IP6_ERROR_TIME_EXPIRED;
1939 next0 = IP6_REWRITE_NEXT_ICMP_ERROR;
1940 vnet_buffer (p0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
1941 icmp6_error_set_vnet_buffer (p0, ICMP6_time_exceeded,
1942 ICMP6_time_exceeded_ttl_exceeded_in_transit,
1948 p0->flags &= ~VNET_BUFFER_F_LOCALLY_ORIGINATED;
1953 calc_checksums (vm, p0);
1956 /* Guess we are only writing on simple Ethernet header. */
1957 vnet_rewrite_one_header (adj0[0], ip0, sizeof (ethernet_header_t));
1959 /* Update packet buffer attributes/set output interface. */
1960 rw_len0 = adj0[0].rewrite_header.data_bytes;
1961 vnet_buffer (p0)->ip.save_rewrite_length = rw_len0;
1965 vlib_increment_combined_counter
1966 (&adjacency_counters,
1967 thread_index, adj_index0, 1,
1968 vlib_buffer_length_in_chain (vm, p0) + rw_len0);
1971 /* Check MTU of outgoing interface. */
1973 clib_net_to_host_u16 (ip0->payload_length) +
1974 sizeof (ip6_header_t);
1975 if (p0->flags & VNET_BUFFER_F_GSO)
1976 ip0_len = gso_mtu_sz (p0);
1978 ip6_mtu_check (p0, ip0_len,
1979 adj0[0].rewrite_header.max_l3_packet_bytes,
1980 is_locally_originated0, &next0, is_midchain,
1983 /* Don't adjust the buffer for hop count issue; icmp-error node
1984 * wants to see the IP header */
1985 if (PREDICT_TRUE (error0 == IP6_ERROR_NONE))
1987 p0->current_data -= rw_len0;
1988 p0->current_length += rw_len0;
1990 tx_sw_if_index0 = adj0[0].rewrite_header.sw_if_index;
1992 vnet_buffer (p0)->sw_if_index[VLIB_TX] = tx_sw_if_index0;
1993 next0 = adj0[0].rewrite_header.next_index;
1996 (adj0[0].rewrite_header.flags & VNET_REWRITE_HAS_FEATURES))
1997 vnet_feature_arc_start (lm->output_feature_arc_index,
1998 tx_sw_if_index0, &next0, p0);
2002 p0->error = error_node->errors[error0];
2007 if (adj0->sub_type.midchain.fixup_func)
2008 adj0->sub_type.midchain.fixup_func
2009 (vm, adj0, p0, adj0->sub_type.midchain.fixup_data);
2013 vnet_ip_mcast_fixup_header (IP6_MCAST_ADDR_MASK,
2015 rewrite_header.dst_mcast_offset,
2016 &ip0->dst_address.as_u32[3],
2023 n_left_to_next -= 1;
2025 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
2026 to_next, n_left_to_next,
2030 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2033 /* Need to do trace after rewrites to pick up new packet data. */
2034 if (node->flags & VLIB_NODE_FLAG_TRACE)
2035 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
2037 return frame->n_vectors;
2041 ip6_rewrite_inline (vlib_main_t * vm,
2042 vlib_node_runtime_t * node,
2043 vlib_frame_t * frame,
2044 int do_counters, int is_midchain, int is_mcast)
2046 return ip6_rewrite_inline_with_gso (vm, node, frame, do_counters,
2047 is_midchain, is_mcast);
2050 VLIB_NODE_FN (ip6_rewrite_node) (vlib_main_t * vm,
2051 vlib_node_runtime_t * node,
2052 vlib_frame_t * frame)
2054 if (adj_are_counters_enabled ())
2055 return ip6_rewrite_inline (vm, node, frame, 1, 0, 0);
2057 return ip6_rewrite_inline (vm, node, frame, 0, 0, 0);
2060 VLIB_NODE_FN (ip6_rewrite_bcast_node) (vlib_main_t * vm,
2061 vlib_node_runtime_t * node,
2062 vlib_frame_t * frame)
2064 if (adj_are_counters_enabled ())
2065 return ip6_rewrite_inline (vm, node, frame, 1, 0, 0);
2067 return ip6_rewrite_inline (vm, node, frame, 0, 0, 0);
2070 VLIB_NODE_FN (ip6_rewrite_mcast_node) (vlib_main_t * vm,
2071 vlib_node_runtime_t * node,
2072 vlib_frame_t * frame)
2074 if (adj_are_counters_enabled ())
2075 return ip6_rewrite_inline (vm, node, frame, 1, 0, 1);
2077 return ip6_rewrite_inline (vm, node, frame, 0, 0, 1);
2080 VLIB_NODE_FN (ip6_midchain_node) (vlib_main_t * vm,
2081 vlib_node_runtime_t * node,
2082 vlib_frame_t * frame)
2084 if (adj_are_counters_enabled ())
2085 return ip6_rewrite_inline (vm, node, frame, 1, 1, 0);
2087 return ip6_rewrite_inline (vm, node, frame, 0, 1, 0);
2090 VLIB_NODE_FN (ip6_mcast_midchain_node) (vlib_main_t * vm,
2091 vlib_node_runtime_t * node,
2092 vlib_frame_t * frame)
2094 if (adj_are_counters_enabled ())
2095 return ip6_rewrite_inline (vm, node, frame, 1, 1, 1);
2097 return ip6_rewrite_inline (vm, node, frame, 0, 1, 1);
2101 VLIB_REGISTER_NODE (ip6_midchain_node) =
2103 .name = "ip6-midchain",
2104 .vector_size = sizeof (u32),
2105 .format_trace = format_ip6_forward_next_trace,
2106 .sibling_of = "ip6-rewrite",
2109 VLIB_REGISTER_NODE (ip6_rewrite_node) =
2111 .name = "ip6-rewrite",
2112 .vector_size = sizeof (u32),
2113 .format_trace = format_ip6_rewrite_trace,
2114 .n_next_nodes = IP6_REWRITE_N_NEXT,
2117 [IP6_REWRITE_NEXT_DROP] = "ip6-drop",
2118 [IP6_REWRITE_NEXT_ICMP_ERROR] = "ip6-icmp-error",
2119 [IP6_REWRITE_NEXT_FRAGMENT] = "ip6-frag",
2123 VLIB_REGISTER_NODE (ip6_rewrite_bcast_node) = {
2124 .name = "ip6-rewrite-bcast",
2125 .vector_size = sizeof (u32),
2127 .format_trace = format_ip6_rewrite_trace,
2128 .sibling_of = "ip6-rewrite",
2131 VLIB_REGISTER_NODE (ip6_rewrite_mcast_node) =
2133 .name = "ip6-rewrite-mcast",
2134 .vector_size = sizeof (u32),
2135 .format_trace = format_ip6_rewrite_trace,
2136 .sibling_of = "ip6-rewrite",
2140 VLIB_REGISTER_NODE (ip6_mcast_midchain_node) =
2142 .name = "ip6-mcast-midchain",
2143 .vector_size = sizeof (u32),
2144 .format_trace = format_ip6_rewrite_trace,
2145 .sibling_of = "ip6-rewrite",
2151 * Hop-by-Hop handling
2153 #ifndef CLIB_MARCH_VARIANT
2154 ip6_hop_by_hop_main_t ip6_hop_by_hop_main;
2155 #endif /* CLIB_MARCH_VARIANT */
2157 #define foreach_ip6_hop_by_hop_error \
2158 _(PROCESSED, "pkts with ip6 hop-by-hop options") \
2159 _(FORMAT, "incorrectly formatted hop-by-hop options") \
2160 _(UNKNOWN_OPTION, "unknown ip6 hop-by-hop options")
2165 #define _(sym,str) IP6_HOP_BY_HOP_ERROR_##sym,
2166 foreach_ip6_hop_by_hop_error
2168 IP6_HOP_BY_HOP_N_ERROR,
2169 } ip6_hop_by_hop_error_t;
2173 * Primary h-b-h handler trace support
2174 * We work pretty hard on the problem for obvious reasons
2180 u8 option_data[256];
2181 } ip6_hop_by_hop_trace_t;
2183 extern vlib_node_registration_t ip6_hop_by_hop_node;
2185 static char *ip6_hop_by_hop_error_strings[] = {
2186 #define _(sym,string) string,
2187 foreach_ip6_hop_by_hop_error
2191 #ifndef CLIB_MARCH_VARIANT
2193 format_ip6_hop_by_hop_ext_hdr (u8 * s, va_list * args)
2195 ip6_hop_by_hop_header_t *hbh0 = va_arg (*args, ip6_hop_by_hop_header_t *);
2196 int total_len = va_arg (*args, int);
2197 ip6_hop_by_hop_option_t *opt0, *limit0;
2198 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2201 s = format (s, "IP6_HOP_BY_HOP: next protocol %d len %d total %d",
2202 hbh0->protocol, (hbh0->length + 1) << 3, total_len);
2204 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2205 limit0 = (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 + total_len);
2207 while (opt0 < limit0)
2212 case 0: /* Pad, just stop */
2213 opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0 + 1);
2217 if (hm->trace[type0])
2219 s = (*hm->trace[type0]) (s, opt0);
2224 format (s, "\n unrecognized option %d length %d", type0,
2228 (ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length +
2229 sizeof (ip6_hop_by_hop_option_t));
2238 format_ip6_hop_by_hop_trace (u8 * s, va_list * args)
2240 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
2241 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
2242 ip6_hop_by_hop_trace_t *t = va_arg (*args, ip6_hop_by_hop_trace_t *);
2243 ip6_hop_by_hop_header_t *hbh0;
2244 ip6_hop_by_hop_option_t *opt0, *limit0;
2245 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2249 hbh0 = (ip6_hop_by_hop_header_t *) t->option_data;
2251 s = format (s, "IP6_HOP_BY_HOP: next index %d len %d traced %d",
2252 t->next_index, (hbh0->length + 1) << 3, t->trace_len);
2254 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2255 limit0 = (ip6_hop_by_hop_option_t *) ((u8 *) hbh0) + t->trace_len;
2257 while (opt0 < limit0)
2262 case 0: /* Pad, just stop */
2263 opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0) + 1;
2267 if (hm->trace[type0])
2269 s = (*hm->trace[type0]) (s, opt0);
2274 format (s, "\n unrecognized option %d length %d", type0,
2278 (ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length +
2279 sizeof (ip6_hop_by_hop_option_t));
2287 ip6_scan_hbh_options (vlib_buffer_t * b0,
2289 ip6_hop_by_hop_header_t * hbh0,
2290 ip6_hop_by_hop_option_t * opt0,
2291 ip6_hop_by_hop_option_t * limit0, u32 * next0)
2293 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2297 while (opt0 < limit0)
2303 opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0) + 1;
2308 if (hm->options[type0])
2310 if ((*hm->options[type0]) (b0, ip0, opt0) < 0)
2312 error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2318 /* Unrecognized mandatory option, check the two high order bits */
2319 switch (opt0->type & HBH_OPTION_TYPE_HIGH_ORDER_BITS)
2321 case HBH_OPTION_TYPE_SKIP_UNKNOWN:
2323 case HBH_OPTION_TYPE_DISCARD_UNKNOWN:
2324 error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2325 *next0 = IP_LOOKUP_NEXT_DROP;
2327 case HBH_OPTION_TYPE_DISCARD_UNKNOWN_ICMP:
2328 error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2329 *next0 = IP_LOOKUP_NEXT_ICMP_ERROR;
2330 icmp6_error_set_vnet_buffer (b0, ICMP6_parameter_problem,
2331 ICMP6_parameter_problem_unrecognized_option,
2332 (u8 *) opt0 - (u8 *) ip0);
2334 case HBH_OPTION_TYPE_DISCARD_UNKNOWN_ICMP_NOT_MCAST:
2335 error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2336 if (!ip6_address_is_multicast (&ip0->dst_address))
2338 *next0 = IP_LOOKUP_NEXT_ICMP_ERROR;
2339 icmp6_error_set_vnet_buffer (b0,
2340 ICMP6_parameter_problem,
2341 ICMP6_parameter_problem_unrecognized_option,
2342 (u8 *) opt0 - (u8 *) ip0);
2346 *next0 = IP_LOOKUP_NEXT_DROP;
2354 (ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length +
2355 sizeof (ip6_hop_by_hop_option_t));
2361 * Process the Hop-by-Hop Options header
2363 VLIB_NODE_FN (ip6_hop_by_hop_node) (vlib_main_t * vm,
2364 vlib_node_runtime_t * node,
2365 vlib_frame_t * frame)
2367 vlib_node_runtime_t *error_node =
2368 vlib_node_get_runtime (vm, ip6_hop_by_hop_node.index);
2369 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2370 u32 n_left_from, *from, *to_next;
2371 ip_lookup_next_t next_index;
2373 from = vlib_frame_vector_args (frame);
2374 n_left_from = frame->n_vectors;
2375 next_index = node->cached_next_index;
2377 while (n_left_from > 0)
2381 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
2383 while (n_left_from >= 4 && n_left_to_next >= 2)
2386 vlib_buffer_t *b0, *b1;
2388 ip6_header_t *ip0, *ip1;
2389 ip6_hop_by_hop_header_t *hbh0, *hbh1;
2390 ip6_hop_by_hop_option_t *opt0, *limit0, *opt1, *limit1;
2391 u8 error0 = 0, error1 = 0;
2393 /* Prefetch next iteration. */
2395 vlib_buffer_t *p2, *p3;
2397 p2 = vlib_get_buffer (vm, from[2]);
2398 p3 = vlib_get_buffer (vm, from[3]);
2400 vlib_prefetch_buffer_header (p2, LOAD);
2401 vlib_prefetch_buffer_header (p3, LOAD);
2403 CLIB_PREFETCH (p2->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
2404 CLIB_PREFETCH (p3->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
2407 /* Speculatively enqueue b0, b1 to the current next frame */
2408 to_next[0] = bi0 = from[0];
2409 to_next[1] = bi1 = from[1];
2413 n_left_to_next -= 2;
2415 b0 = vlib_get_buffer (vm, bi0);
2416 b1 = vlib_get_buffer (vm, bi1);
2418 /* Default use the next_index from the adjacency. A HBH option rarely redirects to a different node */
2419 u32 adj_index0 = vnet_buffer (b0)->ip.adj_index[VLIB_TX];
2420 ip_adjacency_t *adj0 = adj_get (adj_index0);
2421 u32 adj_index1 = vnet_buffer (b1)->ip.adj_index[VLIB_TX];
2422 ip_adjacency_t *adj1 = adj_get (adj_index1);
2424 /* Default use the next_index from the adjacency. A HBH option rarely redirects to a different node */
2425 next0 = adj0->lookup_next_index;
2426 next1 = adj1->lookup_next_index;
2428 ip0 = vlib_buffer_get_current (b0);
2429 ip1 = vlib_buffer_get_current (b1);
2430 hbh0 = (ip6_hop_by_hop_header_t *) (ip0 + 1);
2431 hbh1 = (ip6_hop_by_hop_header_t *) (ip1 + 1);
2432 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2433 opt1 = (ip6_hop_by_hop_option_t *) (hbh1 + 1);
2435 (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 +
2436 ((hbh0->length + 1) << 3));
2438 (ip6_hop_by_hop_option_t *) ((u8 *) hbh1 +
2439 ((hbh1->length + 1) << 3));
2442 * Basic validity checks
2444 if ((hbh0->length + 1) << 3 >
2445 clib_net_to_host_u16 (ip0->payload_length))
2447 error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2448 next0 = IP_LOOKUP_NEXT_DROP;
2451 /* Scan the set of h-b-h options, process ones that we understand */
2452 error0 = ip6_scan_hbh_options (b0, ip0, hbh0, opt0, limit0, &next0);
2454 if ((hbh1->length + 1) << 3 >
2455 clib_net_to_host_u16 (ip1->payload_length))
2457 error1 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2458 next1 = IP_LOOKUP_NEXT_DROP;
2461 /* Scan the set of h-b-h options, process ones that we understand */
2462 error1 = ip6_scan_hbh_options (b1, ip1, hbh1, opt1, limit1, &next1);
2465 /* Has the classifier flagged this buffer for special treatment? */
2468 && (vnet_buffer (b0)->l2_classify.opaque_index & OI_DECAP)))
2469 next0 = hm->next_override;
2471 /* Has the classifier flagged this buffer for special treatment? */
2474 && (vnet_buffer (b1)->l2_classify.opaque_index & OI_DECAP)))
2475 next1 = hm->next_override;
2477 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)))
2479 if (b0->flags & VLIB_BUFFER_IS_TRACED)
2481 ip6_hop_by_hop_trace_t *t =
2482 vlib_add_trace (vm, node, b0, sizeof (*t));
2483 u32 trace_len = (hbh0->length + 1) << 3;
2484 t->next_index = next0;
2485 /* Capture the h-b-h option verbatim */
2488 ARRAY_LEN (t->option_data) ? trace_len :
2489 ARRAY_LEN (t->option_data);
2490 t->trace_len = trace_len;
2491 clib_memcpy_fast (t->option_data, hbh0, trace_len);
2493 if (b1->flags & VLIB_BUFFER_IS_TRACED)
2495 ip6_hop_by_hop_trace_t *t =
2496 vlib_add_trace (vm, node, b1, sizeof (*t));
2497 u32 trace_len = (hbh1->length + 1) << 3;
2498 t->next_index = next1;
2499 /* Capture the h-b-h option verbatim */
2502 ARRAY_LEN (t->option_data) ? trace_len :
2503 ARRAY_LEN (t->option_data);
2504 t->trace_len = trace_len;
2505 clib_memcpy_fast (t->option_data, hbh1, trace_len);
2510 b0->error = error_node->errors[error0];
2511 b1->error = error_node->errors[error1];
2513 /* verify speculative enqueue, maybe switch current next frame */
2514 vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
2515 n_left_to_next, bi0, bi1, next0,
2519 while (n_left_from > 0 && n_left_to_next > 0)
2525 ip6_hop_by_hop_header_t *hbh0;
2526 ip6_hop_by_hop_option_t *opt0, *limit0;
2529 /* Speculatively enqueue b0 to the current next frame */
2535 n_left_to_next -= 1;
2537 b0 = vlib_get_buffer (vm, bi0);
2539 * Default use the next_index from the adjacency.
2540 * A HBH option rarely redirects to a different node
2542 u32 adj_index0 = vnet_buffer (b0)->ip.adj_index[VLIB_TX];
2543 ip_adjacency_t *adj0 = adj_get (adj_index0);
2544 next0 = adj0->lookup_next_index;
2546 ip0 = vlib_buffer_get_current (b0);
2547 hbh0 = (ip6_hop_by_hop_header_t *) (ip0 + 1);
2548 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2550 (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 +
2551 ((hbh0->length + 1) << 3));
2554 * Basic validity checks
2556 if ((hbh0->length + 1) << 3 >
2557 clib_net_to_host_u16 (ip0->payload_length))
2559 error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2560 next0 = IP_LOOKUP_NEXT_DROP;
2564 /* Scan the set of h-b-h options, process ones that we understand */
2565 error0 = ip6_scan_hbh_options (b0, ip0, hbh0, opt0, limit0, &next0);
2568 /* Has the classifier flagged this buffer for special treatment? */
2571 && (vnet_buffer (b0)->l2_classify.opaque_index & OI_DECAP)))
2572 next0 = hm->next_override;
2574 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
2576 ip6_hop_by_hop_trace_t *t =
2577 vlib_add_trace (vm, node, b0, sizeof (*t));
2578 u32 trace_len = (hbh0->length + 1) << 3;
2579 t->next_index = next0;
2580 /* Capture the h-b-h option verbatim */
2583 ARRAY_LEN (t->option_data) ? trace_len :
2584 ARRAY_LEN (t->option_data);
2585 t->trace_len = trace_len;
2586 clib_memcpy_fast (t->option_data, hbh0, trace_len);
2589 b0->error = error_node->errors[error0];
2591 /* verify speculative enqueue, maybe switch current next frame */
2592 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
2593 n_left_to_next, bi0, next0);
2595 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2597 return frame->n_vectors;
2601 VLIB_REGISTER_NODE (ip6_hop_by_hop_node) =
2603 .name = "ip6-hop-by-hop",
2604 .sibling_of = "ip6-lookup",
2605 .vector_size = sizeof (u32),
2606 .format_trace = format_ip6_hop_by_hop_trace,
2607 .type = VLIB_NODE_TYPE_INTERNAL,
2608 .n_errors = ARRAY_LEN (ip6_hop_by_hop_error_strings),
2609 .error_strings = ip6_hop_by_hop_error_strings,
2614 static clib_error_t *
2615 ip6_hop_by_hop_init (vlib_main_t * vm)
2617 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2618 clib_memset (hm->options, 0, sizeof (hm->options));
2619 clib_memset (hm->trace, 0, sizeof (hm->trace));
2620 hm->next_override = IP6_LOOKUP_NEXT_POP_HOP_BY_HOP;
2624 VLIB_INIT_FUNCTION (ip6_hop_by_hop_init);
2626 #ifndef CLIB_MARCH_VARIANT
2628 ip6_hbh_set_next_override (uword next)
2630 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2632 hm->next_override = next;
2636 ip6_hbh_register_option (u8 option,
2637 int options (vlib_buffer_t * b, ip6_header_t * ip,
2638 ip6_hop_by_hop_option_t * opt),
2639 u8 * trace (u8 * s, ip6_hop_by_hop_option_t * opt))
2641 ip6_main_t *im = &ip6_main;
2642 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2644 ASSERT ((u32) option < ARRAY_LEN (hm->options));
2646 /* Already registered */
2647 if (hm->options[option])
2650 hm->options[option] = options;
2651 hm->trace[option] = trace;
2653 /* Set global variable */
2654 im->hbh_enabled = 1;
2660 ip6_hbh_unregister_option (u8 option)
2662 ip6_main_t *im = &ip6_main;
2663 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2665 ASSERT ((u32) option < ARRAY_LEN (hm->options));
2667 /* Not registered */
2668 if (!hm->options[option])
2671 hm->options[option] = NULL;
2672 hm->trace[option] = NULL;
2674 /* Disable global knob if this was the last option configured */
2677 for (i = 0; i < 256; i++)
2679 if (hm->options[option])
2686 im->hbh_enabled = 0;
2691 /* Global IP6 main. */
2692 ip6_main_t ip6_main;
2695 static clib_error_t *
2696 ip6_lookup_init (vlib_main_t * vm)
2698 ip6_main_t *im = &ip6_main;
2699 clib_error_t *error;
2702 if ((error = vlib_call_init_function (vm, vnet_feature_init)))
2705 for (i = 0; i < ARRAY_LEN (im->fib_masks); i++)
2712 for (j = 0; j < i0; j++)
2713 im->fib_masks[i].as_u32[j] = ~0;
2716 im->fib_masks[i].as_u32[i0] =
2717 clib_host_to_net_u32 (pow2_mask (i1) << (32 - i1));
2720 ip_lookup_init (&im->lookup_main, /* is_ip6 */ 1);
2722 if (im->lookup_table_nbuckets == 0)
2723 im->lookup_table_nbuckets = IP6_FIB_DEFAULT_HASH_NUM_BUCKETS;
2725 im->lookup_table_nbuckets = 1 << max_log2 (im->lookup_table_nbuckets);
2727 if (im->lookup_table_size == 0)
2728 im->lookup_table_size = IP6_FIB_DEFAULT_HASH_MEMORY_SIZE;
2730 clib_bihash_init_24_8 (&(im->ip6_table[IP6_FIB_TABLE_FWDING].ip6_hash),
2731 "ip6 FIB fwding table",
2732 im->lookup_table_nbuckets, im->lookup_table_size);
2733 clib_bihash_init_24_8 (&im->ip6_table[IP6_FIB_TABLE_NON_FWDING].ip6_hash,
2734 "ip6 FIB non-fwding table",
2735 im->lookup_table_nbuckets, im->lookup_table_size);
2736 clib_bihash_init_40_8 (&im->ip6_mtable.ip6_mhash,
2738 im->lookup_table_nbuckets, im->lookup_table_size);
2740 /* Create FIB with index 0 and table id of 0. */
2741 fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6, 0,
2742 FIB_SOURCE_DEFAULT_ROUTE);
2743 mfib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6, 0,
2744 MFIB_SOURCE_DEFAULT_ROUTE);
2748 pn = pg_get_node (ip6_lookup_node.index);
2749 pn->unformat_edit = unformat_pg_ip6_header;
2752 /* Unless explicitly configured, don't process HBH options */
2753 im->hbh_enabled = 0;
2758 VLIB_INIT_FUNCTION (ip6_lookup_init);
2760 #ifndef CLIB_MARCH_VARIANT
2762 vnet_set_ip6_flow_hash (u32 table_id, u32 flow_hash_config)
2766 fib_index = fib_table_find (FIB_PROTOCOL_IP6, table_id);
2768 if (~0 == fib_index)
2769 return VNET_API_ERROR_NO_SUCH_FIB;
2771 fib_table_set_flow_hash_config (fib_index, FIB_PROTOCOL_IP6,
2778 static clib_error_t *
2779 set_ip6_flow_hash_command_fn (vlib_main_t * vm,
2780 unformat_input_t * input,
2781 vlib_cli_command_t * cmd)
2785 u32 flow_hash_config = 0;
2788 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
2790 if (unformat (input, "table %d", &table_id))
2793 else if (unformat (input, #a)) { flow_hash_config |= v; matched=1;}
2794 foreach_flow_hash_bit
2801 return clib_error_return (0, "unknown input `%U'",
2802 format_unformat_error, input);
2804 rv = vnet_set_ip6_flow_hash (table_id, flow_hash_config);
2811 return clib_error_return (0, "no such FIB table %d", table_id);
2814 clib_warning ("BUG: illegal flow hash config 0x%x", flow_hash_config);
2822 * Configure the set of IPv6 fields used by the flow hash.
2826 * Example of how to set the flow hash on a given table:
2827 * @cliexcmd{set ip6 flow-hash table 8 dst sport dport proto}
2829 * Example of display the configured flow hash:
2830 * @cliexstart{show ip6 fib}
2831 * ipv6-VRF:0, fib_index 0, flow hash: src dst sport dport proto
2834 * [@0]: dpo-load-balance: [index:5 buckets:1 uRPF:5 to:[0:0]]
2835 * [0] [@0]: dpo-drop ip6
2838 * [@0]: dpo-load-balance: [index:10 buckets:1 uRPF:10 to:[0:0]]
2839 * [0] [@2]: dpo-receive
2842 * [@0]: dpo-load-balance: [index:8 buckets:1 uRPF:8 to:[0:0]]
2843 * [0] [@2]: dpo-receive
2846 * [@0]: dpo-load-balance: [index:7 buckets:1 uRPF:7 to:[0:0]]
2847 * [0] [@2]: dpo-receive
2850 * [@0]: dpo-load-balance: [index:9 buckets:1 uRPF:9 to:[0:0]]
2851 * [0] [@2]: dpo-receive
2852 * ff02::1:ff00:0/104
2854 * [@0]: dpo-load-balance: [index:6 buckets:1 uRPF:6 to:[0:0]]
2855 * [0] [@2]: dpo-receive
2856 * ipv6-VRF:8, fib_index 1, flow hash: dst sport dport proto
2859 * [@0]: dpo-load-balance: [index:21 buckets:1 uRPF:20 to:[0:0]]
2860 * [0] [@0]: dpo-drop ip6
2863 * [@0]: dpo-load-balance: [index:27 buckets:1 uRPF:26 to:[0:0]]
2864 * [0] [@4]: ipv6-glean: af_packet0
2867 * [@0]: dpo-load-balance: [index:28 buckets:1 uRPF:27 to:[0:0]]
2868 * [0] [@2]: dpo-receive: @::a:1:1:0:7 on af_packet0
2871 * [@0]: dpo-load-balance: [index:26 buckets:1 uRPF:25 to:[0:0]]
2872 * [0] [@2]: dpo-receive
2873 * fe80::fe:3eff:fe3e:9222/128
2875 * [@0]: dpo-load-balance: [index:29 buckets:1 uRPF:28 to:[0:0]]
2876 * [0] [@2]: dpo-receive: fe80::fe:3eff:fe3e:9222 on af_packet0
2879 * [@0]: dpo-load-balance: [index:24 buckets:1 uRPF:23 to:[0:0]]
2880 * [0] [@2]: dpo-receive
2883 * [@0]: dpo-load-balance: [index:23 buckets:1 uRPF:22 to:[0:0]]
2884 * [0] [@2]: dpo-receive
2887 * [@0]: dpo-load-balance: [index:25 buckets:1 uRPF:24 to:[0:0]]
2888 * [0] [@2]: dpo-receive
2889 * ff02::1:ff00:0/104
2891 * [@0]: dpo-load-balance: [index:22 buckets:1 uRPF:21 to:[0:0]]
2892 * [0] [@2]: dpo-receive
2897 VLIB_CLI_COMMAND (set_ip6_flow_hash_command, static) =
2899 .path = "set ip6 flow-hash",
2901 "set ip6 flow-hash table <table-id> [src] [dst] [sport] [dport] [proto] [reverse]",
2902 .function = set_ip6_flow_hash_command_fn,
2906 static clib_error_t *
2907 show_ip6_local_command_fn (vlib_main_t * vm,
2908 unformat_input_t * input, vlib_cli_command_t * cmd)
2910 ip6_main_t *im = &ip6_main;
2911 ip_lookup_main_t *lm = &im->lookup_main;
2914 vlib_cli_output (vm, "Protocols handled by ip6_local");
2915 for (i = 0; i < ARRAY_LEN (lm->local_next_by_ip_protocol); i++)
2917 if (lm->local_next_by_ip_protocol[i] != IP_LOCAL_NEXT_PUNT)
2920 u32 node_index = vlib_get_node (vm,
2921 ip6_local_node.index)->
2922 next_nodes[lm->local_next_by_ip_protocol[i]];
2923 vlib_cli_output (vm, "%d: %U", i, format_vlib_node_name, vm,
2933 * Display the set of protocols handled by the local IPv6 stack.
2936 * Example of how to display local protocol table:
2937 * @cliexstart{show ip6 local}
2938 * Protocols handled by ip6_local
2946 VLIB_CLI_COMMAND (show_ip6_local, static) =
2948 .path = "show ip6 local",
2949 .function = show_ip6_local_command_fn,
2950 .short_help = "show ip6 local",
2954 #ifndef CLIB_MARCH_VARIANT
2956 vnet_set_ip6_classify_intfc (vlib_main_t * vm, u32 sw_if_index,
2959 vnet_main_t *vnm = vnet_get_main ();
2960 vnet_interface_main_t *im = &vnm->interface_main;
2961 ip6_main_t *ipm = &ip6_main;
2962 ip_lookup_main_t *lm = &ipm->lookup_main;
2963 vnet_classify_main_t *cm = &vnet_classify_main;
2964 ip6_address_t *if_addr;
2966 if (pool_is_free_index (im->sw_interfaces, sw_if_index))
2967 return VNET_API_ERROR_NO_MATCHING_INTERFACE;
2969 if (table_index != ~0 && pool_is_free_index (cm->tables, table_index))
2970 return VNET_API_ERROR_NO_SUCH_ENTRY;
2972 vec_validate (lm->classify_table_index_by_sw_if_index, sw_if_index);
2973 lm->classify_table_index_by_sw_if_index[sw_if_index] = table_index;
2975 if_addr = ip6_interface_first_address (ipm, sw_if_index);
2977 if (NULL != if_addr)
2979 fib_prefix_t pfx = {
2981 .fp_proto = FIB_PROTOCOL_IP6,
2982 .fp_addr.ip6 = *if_addr,
2986 fib_index = fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4,
2990 if (table_index != (u32) ~ 0)
2992 dpo_id_t dpo = DPO_INVALID;
2997 classify_dpo_create (DPO_PROTO_IP6, table_index));
2999 fib_table_entry_special_dpo_add (fib_index,
3001 FIB_SOURCE_CLASSIFY,
3002 FIB_ENTRY_FLAG_NONE, &dpo);
3007 fib_table_entry_special_remove (fib_index,
3008 &pfx, FIB_SOURCE_CLASSIFY);
3016 static clib_error_t *
3017 set_ip6_classify_command_fn (vlib_main_t * vm,
3018 unformat_input_t * input,
3019 vlib_cli_command_t * cmd)
3021 u32 table_index = ~0;
3022 int table_index_set = 0;
3023 u32 sw_if_index = ~0;
3026 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
3028 if (unformat (input, "table-index %d", &table_index))
3029 table_index_set = 1;
3030 else if (unformat (input, "intfc %U", unformat_vnet_sw_interface,
3031 vnet_get_main (), &sw_if_index))
3037 if (table_index_set == 0)
3038 return clib_error_return (0, "classify table-index must be specified");
3040 if (sw_if_index == ~0)
3041 return clib_error_return (0, "interface / subif must be specified");
3043 rv = vnet_set_ip6_classify_intfc (vm, sw_if_index, table_index);
3050 case VNET_API_ERROR_NO_MATCHING_INTERFACE:
3051 return clib_error_return (0, "No such interface");
3053 case VNET_API_ERROR_NO_SUCH_ENTRY:
3054 return clib_error_return (0, "No such classifier table");
3060 * Assign a classification table to an interface. The classification
3061 * table is created using the '<em>classify table</em>' and '<em>classify session</em>'
3062 * commands. Once the table is create, use this command to filter packets
3066 * Example of how to assign a classification table to an interface:
3067 * @cliexcmd{set ip6 classify intfc GigabitEthernet2/0/0 table-index 1}
3070 VLIB_CLI_COMMAND (set_ip6_classify_command, static) =
3072 .path = "set ip6 classify",
3074 "set ip6 classify intfc <interface> table-index <classify-idx>",
3075 .function = set_ip6_classify_command_fn,
3079 static clib_error_t *
3080 ip6_config (vlib_main_t * vm, unformat_input_t * input)
3082 ip6_main_t *im = &ip6_main;
3087 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
3089 if (unformat (input, "hash-buckets %d", &tmp))
3091 else if (unformat (input, "heap-size %U",
3092 unformat_memory_size, &heapsize))
3095 return clib_error_return (0, "unknown input '%U'",
3096 format_unformat_error, input);
3099 im->lookup_table_nbuckets = nbuckets;
3100 im->lookup_table_size = heapsize;
3105 VLIB_EARLY_CONFIG_FUNCTION (ip6_config, "ip6");
3108 * fd.io coding-style-patch-verification: ON
3111 * eval: (c-set-style "gnu")