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;
1166 u32 n_ip_bytes_this_buffer =
1167 p0->current_length - (((u8 *) ip0 - p0->data) - p0->current_data);
1168 if (n_this_buffer + headers_size > n_ip_bytes_this_buffer)
1170 n_this_buffer = p0->current_length > headers_size ?
1171 n_ip_bytes_this_buffer - headers_size : 0;
1175 n_bytes_left -= n_this_buffer;
1176 n_bytes_left -= p0->total_length_not_including_first_buffer;
1178 if (n_bytes_left == 0)
1186 ip6_local_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
1187 vlib_frame_t * frame, int head_of_feature_arc)
1189 ip6_main_t *im = &ip6_main;
1190 ip_lookup_main_t *lm = &im->lookup_main;
1191 u32 *from, n_left_from;
1192 vlib_node_runtime_t *error_node =
1193 vlib_node_get_runtime (vm, ip6_input_node.index);
1194 u8 arc_index = vnet_feat_arc_ip6_local.feature_arc_index;
1195 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
1196 u16 nexts[VLIB_FRAME_SIZE], *next;
1198 from = vlib_frame_vector_args (frame);
1199 n_left_from = frame->n_vectors;
1201 if (node->flags & VLIB_NODE_FLAG_TRACE)
1202 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
1204 vlib_get_buffers (vm, from, bufs, n_left_from);
1208 while (n_left_from > 2)
1210 /* Prefetch next iteration. */
1211 if (n_left_from >= 6)
1213 vlib_prefetch_buffer_header (b[4], STORE);
1214 vlib_prefetch_buffer_header (b[5], STORE);
1215 vlib_prefetch_buffer_data (b[2], LOAD);
1216 vlib_prefetch_buffer_data (b[3], LOAD);
1220 error[0] = IP6_ERROR_UNKNOWN_PROTOCOL;
1221 error[1] = IP6_ERROR_UNKNOWN_PROTOCOL;
1223 ip6_header_t *ip[2];
1224 ip[0] = vlib_buffer_get_current (b[0]);
1225 ip[1] = vlib_buffer_get_current (b[1]);
1227 if (head_of_feature_arc)
1229 vnet_buffer (b[0])->l3_hdr_offset = b[0]->current_data;
1230 vnet_buffer (b[1])->l3_hdr_offset = b[1]->current_data;
1233 type[0] = lm->builtin_protocol_by_ip_protocol[ip[0]->protocol];
1234 type[1] = lm->builtin_protocol_by_ip_protocol[ip[1]->protocol];
1237 flags[0] = b[0]->flags;
1238 flags[1] = b[1]->flags;
1240 u32 good_l4_csum[2];
1242 flags[0] & (VNET_BUFFER_F_L4_CHECKSUM_CORRECT |
1243 VNET_BUFFER_F_OFFLOAD_TCP_CKSUM |
1244 VNET_BUFFER_F_OFFLOAD_UDP_CKSUM);
1246 flags[1] & (VNET_BUFFER_F_L4_CHECKSUM_CORRECT |
1247 VNET_BUFFER_F_OFFLOAD_TCP_CKSUM |
1248 VNET_BUFFER_F_OFFLOAD_UDP_CKSUM);
1250 u32 udp_offset[2] = { };
1253 ip6_next_proto_is_tcp_udp (b[0], ip[0], &udp_offset[0]);
1255 ip6_next_proto_is_tcp_udp (b[1], ip[1], &udp_offset[1]);
1256 i16 len_diff[2] = { 0 };
1257 if (PREDICT_TRUE (is_tcp_udp[0]))
1260 (udp_header_t *) ((u8 *) ip[0] + udp_offset[0]);
1261 good_l4_csum[0] |= type[0] == IP_BUILTIN_PROTOCOL_UDP
1262 && udp->checksum == 0;
1263 /* optimistically verify UDP length. */
1264 u16 ip_len, udp_len;
1265 ip_len = clib_net_to_host_u16 (ip[0]->payload_length);
1266 udp_len = clib_net_to_host_u16 (udp->length);
1267 len_diff[0] = ip_len - udp_len;
1269 if (PREDICT_TRUE (is_tcp_udp[1]))
1272 (udp_header_t *) ((u8 *) ip[1] + udp_offset[1]);
1273 good_l4_csum[1] |= type[1] == IP_BUILTIN_PROTOCOL_UDP
1274 && udp->checksum == 0;
1275 /* optimistically verify UDP length. */
1276 u16 ip_len, udp_len;
1277 ip_len = clib_net_to_host_u16 (ip[1]->payload_length);
1278 udp_len = clib_net_to_host_u16 (udp->length);
1279 len_diff[1] = ip_len - udp_len;
1282 good_l4_csum[0] |= type[0] == IP_BUILTIN_PROTOCOL_UNKNOWN;
1283 good_l4_csum[1] |= type[1] == IP_BUILTIN_PROTOCOL_UNKNOWN;
1285 len_diff[0] = type[0] == IP_BUILTIN_PROTOCOL_UDP ? len_diff[0] : 0;
1286 len_diff[1] = type[1] == IP_BUILTIN_PROTOCOL_UDP ? len_diff[1] : 0;
1289 need_csum[0] = type[0] != IP_BUILTIN_PROTOCOL_UNKNOWN
1291 && !(flags[0] & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED);
1292 need_csum[1] = type[1] != IP_BUILTIN_PROTOCOL_UNKNOWN
1294 && !(flags[1] & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED);
1295 if (PREDICT_FALSE (need_csum[0]))
1297 flags[0] = ip6_tcp_udp_icmp_validate_checksum (vm, b[0]);
1298 good_l4_csum[0] = flags[0] & VNET_BUFFER_F_L4_CHECKSUM_CORRECT;
1299 error[0] = IP6_ERROR_UNKNOWN_PROTOCOL;
1303 if (ip6_tcp_udp_icmp_bad_length (vm, b[0]))
1304 error[0] = IP6_ERROR_BAD_LENGTH;
1306 if (PREDICT_FALSE (need_csum[1]))
1308 flags[1] = ip6_tcp_udp_icmp_validate_checksum (vm, b[1]);
1309 good_l4_csum[1] = flags[1] & VNET_BUFFER_F_L4_CHECKSUM_CORRECT;
1310 error[1] = IP6_ERROR_UNKNOWN_PROTOCOL;
1314 if (ip6_tcp_udp_icmp_bad_length (vm, b[1]))
1315 error[1] = IP6_ERROR_BAD_LENGTH;
1319 error[0] = len_diff[0] < 0 ? IP6_ERROR_UDP_LENGTH : error[0];
1321 error[1] = len_diff[1] < 0 ? IP6_ERROR_UDP_LENGTH : error[1];
1323 STATIC_ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_UDP ==
1324 IP6_ERROR_UDP_CHECKSUM,
1325 "Wrong IP6 errors constants");
1326 STATIC_ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_ICMP ==
1327 IP6_ERROR_ICMP_CHECKSUM,
1328 "Wrong IP6 errors constants");
1331 !good_l4_csum[0] ? IP6_ERROR_UDP_CHECKSUM + type[0] : error[0];
1333 !good_l4_csum[1] ? IP6_ERROR_UDP_CHECKSUM + type[1] : error[1];
1335 /* Drop packets from unroutable hosts. */
1336 /* If this is a neighbor solicitation (ICMP), skip source RPF check */
1338 unroutable[0] = error[0] == IP6_ERROR_UNKNOWN_PROTOCOL
1339 && type[0] != IP_BUILTIN_PROTOCOL_ICMP
1340 && !ip6_address_is_link_local_unicast (&ip[0]->src_address);
1341 unroutable[1] = error[1] == IP6_ERROR_UNKNOWN_PROTOCOL
1342 && type[1] != IP_BUILTIN_PROTOCOL_ICMP
1343 && !ip6_address_is_link_local_unicast (&ip[1]->src_address);
1344 if (PREDICT_FALSE (unroutable[0]))
1347 !ip6_urpf_loose_check (im, b[0],
1348 ip[0]) ? IP6_ERROR_SRC_LOOKUP_MISS
1351 if (PREDICT_FALSE (unroutable[1]))
1354 !ip6_urpf_loose_check (im, b[1],
1355 ip[1]) ? IP6_ERROR_SRC_LOOKUP_MISS
1359 vnet_buffer (b[0])->ip.fib_index =
1360 vnet_buffer (b[0])->sw_if_index[VLIB_TX] != ~0 ?
1361 vnet_buffer (b[0])->sw_if_index[VLIB_TX] :
1362 vnet_buffer (b[0])->ip.fib_index;
1363 vnet_buffer (b[1])->ip.fib_index =
1364 vnet_buffer (b[1])->sw_if_index[VLIB_TX] != ~0 ?
1365 vnet_buffer (b[1])->sw_if_index[VLIB_TX] :
1366 vnet_buffer (b[1])->ip.fib_index;
1367 } /* head_of_feature_arc */
1369 next[0] = lm->local_next_by_ip_protocol[ip[0]->protocol];
1371 error[0] != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next[0];
1372 next[1] = lm->local_next_by_ip_protocol[ip[1]->protocol];
1374 error[1] != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next[1];
1376 b[0]->error = error_node->errors[0];
1377 b[1]->error = error_node->errors[1];
1379 if (head_of_feature_arc)
1382 ip6_unknown[0] = error[0] == (u8) IP6_ERROR_UNKNOWN_PROTOCOL;
1383 ip6_unknown[1] = error[1] == (u8) IP6_ERROR_UNKNOWN_PROTOCOL;
1384 if (PREDICT_TRUE (ip6_unknown[0]))
1386 u32 next32 = next[0];
1387 vnet_feature_arc_start (arc_index,
1388 vnet_buffer (b[0])->sw_if_index
1389 [VLIB_RX], &next32, b[0]);
1392 if (PREDICT_TRUE (ip6_unknown[1]))
1394 u32 next32 = next[1];
1395 vnet_feature_arc_start (arc_index,
1396 vnet_buffer (b[1])->sw_if_index
1397 [VLIB_RX], &next32, b[1]);
1411 error = IP6_ERROR_UNKNOWN_PROTOCOL;
1414 ip = vlib_buffer_get_current (b[0]);
1416 if (head_of_feature_arc)
1418 vnet_buffer (b[0])->l3_hdr_offset = b[0]->current_data;
1419 u8 type = lm->builtin_protocol_by_ip_protocol[ip->protocol];
1421 u32 flags = b[0]->flags;
1423 flags & (VNET_BUFFER_F_L4_CHECKSUM_CORRECT |
1424 VNET_BUFFER_F_OFFLOAD_TCP_CKSUM |
1425 VNET_BUFFER_F_OFFLOAD_UDP_CKSUM);
1429 u8 is_tcp_udp = ip6_next_proto_is_tcp_udp (b[0], ip, &udp_offset);
1430 if (PREDICT_TRUE (is_tcp_udp))
1432 udp_header_t *udp = (udp_header_t *) ((u8 *) ip + udp_offset);
1433 /* Don't verify UDP checksum for packets with explicit zero checksum. */
1434 good_l4_csum |= type == IP_BUILTIN_PROTOCOL_UDP
1435 && udp->checksum == 0;
1436 /* optimistically verify UDP length. */
1437 u16 ip_len, udp_len;
1438 ip_len = clib_net_to_host_u16 (ip->payload_length);
1439 udp_len = clib_net_to_host_u16 (udp->length);
1440 len_diff = ip_len - udp_len;
1443 good_l4_csum |= type == IP_BUILTIN_PROTOCOL_UNKNOWN;
1444 len_diff = type == IP_BUILTIN_PROTOCOL_UDP ? len_diff : 0;
1446 u8 need_csum = type != IP_BUILTIN_PROTOCOL_UNKNOWN && !good_l4_csum
1447 && !(flags & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED);
1448 if (PREDICT_FALSE (need_csum))
1450 flags = ip6_tcp_udp_icmp_validate_checksum (vm, b[0]);
1451 good_l4_csum = flags & VNET_BUFFER_F_L4_CHECKSUM_CORRECT;
1452 error = IP6_ERROR_UNKNOWN_PROTOCOL;
1456 if (ip6_tcp_udp_icmp_bad_length (vm, b[0]))
1457 error = IP6_ERROR_BAD_LENGTH;
1462 error = len_diff < 0 ? IP6_ERROR_UDP_LENGTH : error;
1464 STATIC_ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_UDP ==
1465 IP6_ERROR_UDP_CHECKSUM,
1466 "Wrong IP6 errors constants");
1467 STATIC_ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_ICMP ==
1468 IP6_ERROR_ICMP_CHECKSUM,
1469 "Wrong IP6 errors constants");
1471 error = !good_l4_csum ? IP6_ERROR_UDP_CHECKSUM + type : error;
1473 /* Drop packets from unroutable hosts. */
1474 /* If this is a neighbor solicitation (ICMP), skip source RPF check */
1475 u8 unroutable = error == IP6_ERROR_UNKNOWN_PROTOCOL
1476 && type != IP_BUILTIN_PROTOCOL_ICMP
1477 && !ip6_address_is_link_local_unicast (&ip->src_address);
1478 if (PREDICT_FALSE (unroutable))
1481 !ip6_urpf_loose_check (im, b[0],
1482 ip) ? IP6_ERROR_SRC_LOOKUP_MISS :
1486 vnet_buffer (b[0])->ip.fib_index =
1487 vnet_buffer (b[0])->sw_if_index[VLIB_TX] != ~0 ?
1488 vnet_buffer (b[0])->sw_if_index[VLIB_TX] :
1489 vnet_buffer (b[0])->ip.fib_index;
1490 } /* head_of_feature_arc */
1492 next[0] = lm->local_next_by_ip_protocol[ip->protocol];
1494 error != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next[0];
1496 b[0]->error = error_node->errors[0];
1498 if (head_of_feature_arc)
1500 if (PREDICT_TRUE (error == (u8) IP6_ERROR_UNKNOWN_PROTOCOL))
1502 u32 next32 = next[0];
1503 vnet_feature_arc_start (arc_index,
1504 vnet_buffer (b[0])->sw_if_index
1505 [VLIB_RX], &next32, b[0]);
1516 vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors);
1517 return frame->n_vectors;
1520 VLIB_NODE_FN (ip6_local_node) (vlib_main_t * vm, vlib_node_runtime_t * node,
1521 vlib_frame_t * frame)
1523 return ip6_local_inline (vm, node, frame, 1 /* head of feature arc */ );
1527 VLIB_REGISTER_NODE (ip6_local_node) =
1529 .name = "ip6-local",
1530 .vector_size = sizeof (u32),
1531 .format_trace = format_ip6_forward_next_trace,
1532 .n_next_nodes = IP_LOCAL_N_NEXT,
1535 [IP_LOCAL_NEXT_DROP] = "ip6-drop",
1536 [IP_LOCAL_NEXT_PUNT] = "ip6-punt",
1537 [IP_LOCAL_NEXT_UDP_LOOKUP] = "ip6-udp-lookup",
1538 [IP_LOCAL_NEXT_ICMP] = "ip6-icmp-input",
1539 [IP_LOCAL_NEXT_REASSEMBLY] = "ip6-full-reassembly",
1544 VLIB_NODE_FN (ip6_local_end_of_arc_node) (vlib_main_t * vm,
1545 vlib_node_runtime_t * node,
1546 vlib_frame_t * frame)
1548 return ip6_local_inline (vm, node, frame, 0 /* head of feature arc */ );
1552 VLIB_REGISTER_NODE (ip6_local_end_of_arc_node) = {
1553 .name = "ip6-local-end-of-arc",
1554 .vector_size = sizeof (u32),
1556 .format_trace = format_ip6_forward_next_trace,
1557 .sibling_of = "ip6-local",
1560 VNET_FEATURE_INIT (ip6_local_end_of_arc, static) = {
1561 .arc_name = "ip6-local",
1562 .node_name = "ip6-local-end-of-arc",
1563 .runs_before = 0, /* not before any other features */
1567 #ifdef CLIB_MARCH_VARIANT
1568 extern vlib_node_registration_t ip6_local_node;
1573 ip6_register_protocol (u32 protocol, u32 node_index)
1575 vlib_main_t *vm = vlib_get_main ();
1576 ip6_main_t *im = &ip6_main;
1577 ip_lookup_main_t *lm = &im->lookup_main;
1579 ASSERT (protocol < ARRAY_LEN (lm->local_next_by_ip_protocol));
1580 lm->local_next_by_ip_protocol[protocol] =
1581 vlib_node_add_next (vm, ip6_local_node.index, node_index);
1585 ip6_unregister_protocol (u32 protocol)
1587 ip6_main_t *im = &ip6_main;
1588 ip_lookup_main_t *lm = &im->lookup_main;
1590 ASSERT (protocol < ARRAY_LEN (lm->local_next_by_ip_protocol));
1591 lm->local_next_by_ip_protocol[protocol] = IP_LOCAL_NEXT_PUNT;
1595 ip6_probe_neighbor (vlib_main_t * vm, ip6_address_t * dst, u32 sw_if_index,
1598 vnet_main_t *vnm = vnet_get_main ();
1599 ip6_main_t *im = &ip6_main;
1600 icmp6_neighbor_solicitation_header_t *h;
1602 ip_interface_address_t *ia;
1603 ip_adjacency_t *adj;
1604 vnet_hw_interface_t *hi;
1605 vnet_sw_interface_t *si;
1611 si = vnet_get_sw_interface (vnm, sw_if_index);
1613 if (!(si->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP))
1615 return clib_error_return (0, "%U: interface %U down",
1616 format_ip6_address, dst,
1617 format_vnet_sw_if_index_name, vnm,
1622 ip6_interface_address_matching_destination (im, dst, sw_if_index, &ia);
1625 vnm->api_errno = VNET_API_ERROR_NO_MATCHING_INTERFACE;
1626 return clib_error_return
1627 (0, "no matching interface address for destination %U (interface %U)",
1628 format_ip6_address, dst,
1629 format_vnet_sw_if_index_name, vnm, sw_if_index);
1633 vlib_packet_template_get_packet (vm,
1634 &im->discover_neighbor_packet_template,
1637 return clib_error_return (0, "ICMP6 NS packet allocation failed");
1639 hi = vnet_get_sup_hw_interface (vnm, sw_if_index);
1641 /* Destination address is a solicited node multicast address. We need to fill in
1642 the low 24 bits with low 24 bits of target's address. */
1643 h->ip.dst_address.as_u8[13] = dst->as_u8[13];
1644 h->ip.dst_address.as_u8[14] = dst->as_u8[14];
1645 h->ip.dst_address.as_u8[15] = dst->as_u8[15];
1647 h->ip.src_address = src[0];
1648 h->neighbor.target_address = dst[0];
1650 if (PREDICT_FALSE (!hi->hw_address))
1652 return clib_error_return (0, "%U: interface %U do not support ip probe",
1653 format_ip6_address, dst,
1654 format_vnet_sw_if_index_name, vnm,
1658 clib_memcpy_fast (h->link_layer_option.ethernet_address, hi->hw_address,
1659 vec_len (hi->hw_address));
1661 h->neighbor.icmp.checksum =
1662 ip6_tcp_udp_icmp_compute_checksum (vm, 0, &h->ip, &bogus_length);
1663 ASSERT (bogus_length == 0);
1665 b = vlib_get_buffer (vm, bi);
1666 vnet_buffer (b)->sw_if_index[VLIB_RX] =
1667 vnet_buffer (b)->sw_if_index[VLIB_TX] = sw_if_index;
1669 /* Add encapsulation string for software interface (e.g. ethernet header). */
1670 ip46_address_t nh = {
1674 ai = adj_nbr_add_or_lock (FIB_PROTOCOL_IP6,
1675 VNET_LINK_IP6, &nh, sw_if_index);
1678 /* Peer has been previously resolved, retrieve glean adj instead */
1679 if (adj->lookup_next_index == IP_LOOKUP_NEXT_REWRITE && refresh == 0)
1682 ai = adj_glean_add_or_lock (FIB_PROTOCOL_IP6,
1683 VNET_LINK_IP6, sw_if_index, &nh);
1687 vnet_rewrite_one_header (adj[0], h, sizeof (ethernet_header_t));
1688 vlib_buffer_advance (b, -adj->rewrite_header.data_bytes);
1691 vlib_frame_t *f = vlib_get_frame_to_node (vm, hi->output_node_index);
1692 u32 *to_next = vlib_frame_vector_args (f);
1695 vlib_put_frame_to_node (vm, hi->output_node_index, f);
1699 return /* no error */ 0;
1705 IP6_REWRITE_NEXT_DROP,
1706 IP6_REWRITE_NEXT_ICMP_ERROR,
1707 IP6_REWRITE_NEXT_FRAGMENT,
1708 IP6_REWRITE_N_NEXT /* Last */
1709 } ip6_rewrite_next_t;
1712 * This bits of an IPv6 address to mask to construct a multicast
1715 #define IP6_MCAST_ADDR_MASK 0xffffffff
1718 ip6_mtu_check (vlib_buffer_t * b, u16 packet_bytes,
1719 u16 adj_packet_bytes, bool is_locally_generated,
1720 u32 * next, u8 is_midchain, u32 * error)
1722 if (adj_packet_bytes >= 1280 && packet_bytes > adj_packet_bytes)
1724 if (is_locally_generated)
1726 /* IP fragmentation */
1727 ip_frag_set_vnet_buffer (b, adj_packet_bytes,
1729 IP_FRAG_NEXT_IP_REWRITE_MIDCHAIN :
1730 IP_FRAG_NEXT_IP_REWRITE), 0);
1731 *next = IP6_REWRITE_NEXT_FRAGMENT;
1732 *error = IP6_ERROR_MTU_EXCEEDED;
1736 *error = IP6_ERROR_MTU_EXCEEDED;
1737 icmp6_error_set_vnet_buffer (b, ICMP6_packet_too_big, 0,
1739 *next = IP6_REWRITE_NEXT_ICMP_ERROR;
1745 ip6_rewrite_inline_with_gso (vlib_main_t * vm,
1746 vlib_node_runtime_t * node,
1747 vlib_frame_t * frame,
1748 int do_counters, int is_midchain, int is_mcast)
1750 ip_lookup_main_t *lm = &ip6_main.lookup_main;
1751 u32 *from = vlib_frame_vector_args (frame);
1752 u32 n_left_from, n_left_to_next, *to_next, next_index;
1753 vlib_node_runtime_t *error_node =
1754 vlib_node_get_runtime (vm, ip6_input_node.index);
1756 n_left_from = frame->n_vectors;
1757 next_index = node->cached_next_index;
1758 u32 thread_index = vm->thread_index;
1760 while (n_left_from > 0)
1762 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1764 while (n_left_from >= 4 && n_left_to_next >= 2)
1766 const ip_adjacency_t *adj0, *adj1;
1767 vlib_buffer_t *p0, *p1;
1768 ip6_header_t *ip0, *ip1;
1769 u32 pi0, rw_len0, next0, error0, adj_index0;
1770 u32 pi1, rw_len1, next1, error1, adj_index1;
1771 u32 tx_sw_if_index0, tx_sw_if_index1;
1772 bool is_locally_originated0, is_locally_originated1;
1774 /* Prefetch next iteration. */
1776 vlib_buffer_t *p2, *p3;
1778 p2 = vlib_get_buffer (vm, from[2]);
1779 p3 = vlib_get_buffer (vm, from[3]);
1781 vlib_prefetch_buffer_header (p2, LOAD);
1782 vlib_prefetch_buffer_header (p3, LOAD);
1784 CLIB_PREFETCH (p2->pre_data, 32, STORE);
1785 CLIB_PREFETCH (p3->pre_data, 32, STORE);
1787 CLIB_PREFETCH (p2->data, sizeof (ip0[0]), STORE);
1788 CLIB_PREFETCH (p3->data, sizeof (ip0[0]), STORE);
1791 pi0 = to_next[0] = from[0];
1792 pi1 = to_next[1] = from[1];
1797 n_left_to_next -= 2;
1799 p0 = vlib_get_buffer (vm, pi0);
1800 p1 = vlib_get_buffer (vm, pi1);
1802 adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
1803 adj_index1 = vnet_buffer (p1)->ip.adj_index[VLIB_TX];
1805 ip0 = vlib_buffer_get_current (p0);
1806 ip1 = vlib_buffer_get_current (p1);
1808 error0 = error1 = IP6_ERROR_NONE;
1809 next0 = next1 = IP6_REWRITE_NEXT_DROP;
1811 is_locally_originated0 =
1812 p0->flags & VNET_BUFFER_F_LOCALLY_ORIGINATED;
1813 if (PREDICT_TRUE (!is_locally_originated0))
1815 i32 hop_limit0 = ip0->hop_limit;
1817 /* Input node should have reject packets with hop limit 0. */
1818 ASSERT (ip0->hop_limit > 0);
1822 ip0->hop_limit = hop_limit0;
1825 * If the hop count drops below 1 when forwarding, generate
1828 if (PREDICT_FALSE (hop_limit0 <= 0))
1830 error0 = IP6_ERROR_TIME_EXPIRED;
1831 next0 = IP6_REWRITE_NEXT_ICMP_ERROR;
1832 vnet_buffer (p0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
1833 icmp6_error_set_vnet_buffer (p0, ICMP6_time_exceeded,
1834 ICMP6_time_exceeded_ttl_exceeded_in_transit,
1840 p0->flags &= ~VNET_BUFFER_F_LOCALLY_ORIGINATED;
1842 is_locally_originated1 =
1843 p1->flags & VNET_BUFFER_F_LOCALLY_ORIGINATED;
1844 if (PREDICT_TRUE (!is_locally_originated1))
1846 i32 hop_limit1 = ip1->hop_limit;
1848 /* Input node should have reject packets with hop limit 0. */
1849 ASSERT (ip1->hop_limit > 0);
1853 ip1->hop_limit = hop_limit1;
1856 * If the hop count drops below 1 when forwarding, generate
1859 if (PREDICT_FALSE (hop_limit1 <= 0))
1861 error1 = IP6_ERROR_TIME_EXPIRED;
1862 next1 = IP6_REWRITE_NEXT_ICMP_ERROR;
1863 vnet_buffer (p1)->sw_if_index[VLIB_TX] = (u32) ~ 0;
1864 icmp6_error_set_vnet_buffer (p1, ICMP6_time_exceeded,
1865 ICMP6_time_exceeded_ttl_exceeded_in_transit,
1871 p1->flags &= ~VNET_BUFFER_F_LOCALLY_ORIGINATED;
1873 adj0 = adj_get (adj_index0);
1874 adj1 = adj_get (adj_index1);
1876 rw_len0 = adj0[0].rewrite_header.data_bytes;
1877 rw_len1 = adj1[0].rewrite_header.data_bytes;
1878 vnet_buffer (p0)->ip.save_rewrite_length = rw_len0;
1879 vnet_buffer (p1)->ip.save_rewrite_length = rw_len1;
1883 vlib_increment_combined_counter
1884 (&adjacency_counters,
1885 thread_index, adj_index0, 1,
1886 vlib_buffer_length_in_chain (vm, p0) + rw_len0);
1887 vlib_increment_combined_counter
1888 (&adjacency_counters,
1889 thread_index, adj_index1, 1,
1890 vlib_buffer_length_in_chain (vm, p1) + rw_len1);
1893 /* Check MTU of outgoing interface. */
1895 clib_net_to_host_u16 (ip0->payload_length) +
1896 sizeof (ip6_header_t);
1898 clib_net_to_host_u16 (ip1->payload_length) +
1899 sizeof (ip6_header_t);
1900 if (p0->flags & VNET_BUFFER_F_GSO)
1901 ip0_len = gso_mtu_sz (p0);
1902 if (p1->flags & VNET_BUFFER_F_GSO)
1903 ip1_len = gso_mtu_sz (p1);
1907 ip6_mtu_check (p0, ip0_len,
1908 adj0[0].rewrite_header.max_l3_packet_bytes,
1909 is_locally_originated0, &next0, is_midchain,
1911 ip6_mtu_check (p1, ip1_len,
1912 adj1[0].rewrite_header.max_l3_packet_bytes,
1913 is_locally_originated1, &next1, is_midchain,
1916 /* Don't adjust the buffer for hop count issue; icmp-error node
1917 * wants to see the IP header */
1918 if (PREDICT_TRUE (error0 == IP6_ERROR_NONE))
1920 p0->current_data -= rw_len0;
1921 p0->current_length += rw_len0;
1923 tx_sw_if_index0 = adj0[0].rewrite_header.sw_if_index;
1924 vnet_buffer (p0)->sw_if_index[VLIB_TX] = tx_sw_if_index0;
1925 next0 = adj0[0].rewrite_header.next_index;
1928 (adj0[0].rewrite_header.flags & VNET_REWRITE_HAS_FEATURES))
1929 vnet_feature_arc_start (lm->output_feature_arc_index,
1930 tx_sw_if_index0, &next0, p0);
1934 p0->error = error_node->errors[error0];
1936 if (PREDICT_TRUE (error1 == IP6_ERROR_NONE))
1938 p1->current_data -= rw_len1;
1939 p1->current_length += rw_len1;
1941 tx_sw_if_index1 = adj1[0].rewrite_header.sw_if_index;
1942 vnet_buffer (p1)->sw_if_index[VLIB_TX] = tx_sw_if_index1;
1943 next1 = adj1[0].rewrite_header.next_index;
1946 (adj1[0].rewrite_header.flags & VNET_REWRITE_HAS_FEATURES))
1947 vnet_feature_arc_start (lm->output_feature_arc_index,
1948 tx_sw_if_index1, &next1, p1);
1952 p1->error = error_node->errors[error1];
1957 /* before we paint on the next header, update the L4
1958 * checksums if required, since there's no offload on a tunnel */
1959 calc_checksums (vm, p0);
1960 calc_checksums (vm, p1);
1963 /* Guess we are only writing on simple Ethernet header. */
1964 vnet_rewrite_two_headers (adj0[0], adj1[0],
1965 ip0, ip1, sizeof (ethernet_header_t));
1969 if (adj0->sub_type.midchain.fixup_func)
1970 adj0->sub_type.midchain.fixup_func
1971 (vm, adj0, p0, adj0->sub_type.midchain.fixup_data);
1972 if (adj1->sub_type.midchain.fixup_func)
1973 adj1->sub_type.midchain.fixup_func
1974 (vm, adj1, p1, adj1->sub_type.midchain.fixup_data);
1979 * copy bytes from the IP address into the MAC rewrite
1981 vnet_ip_mcast_fixup_header (IP6_MCAST_ADDR_MASK,
1983 rewrite_header.dst_mcast_offset,
1984 &ip0->dst_address.as_u32[3],
1986 vnet_ip_mcast_fixup_header (IP6_MCAST_ADDR_MASK,
1988 rewrite_header.dst_mcast_offset,
1989 &ip1->dst_address.as_u32[3],
1993 vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
1994 to_next, n_left_to_next,
1995 pi0, pi1, next0, next1);
1998 while (n_left_from > 0 && n_left_to_next > 0)
2000 ip_adjacency_t *adj0;
2004 u32 adj_index0, next0, error0;
2005 u32 tx_sw_if_index0;
2006 bool is_locally_originated0;
2008 pi0 = to_next[0] = from[0];
2010 p0 = vlib_get_buffer (vm, pi0);
2012 adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
2014 adj0 = adj_get (adj_index0);
2016 ip0 = vlib_buffer_get_current (p0);
2018 error0 = IP6_ERROR_NONE;
2019 next0 = IP6_REWRITE_NEXT_DROP;
2021 /* Check hop limit */
2022 is_locally_originated0 =
2023 p0->flags & VNET_BUFFER_F_LOCALLY_ORIGINATED;
2024 if (PREDICT_TRUE (!is_locally_originated0))
2026 i32 hop_limit0 = ip0->hop_limit;
2028 ASSERT (ip0->hop_limit > 0);
2032 ip0->hop_limit = hop_limit0;
2034 if (PREDICT_FALSE (hop_limit0 <= 0))
2037 * If the hop count drops below 1 when forwarding, generate
2040 error0 = IP6_ERROR_TIME_EXPIRED;
2041 next0 = IP6_REWRITE_NEXT_ICMP_ERROR;
2042 vnet_buffer (p0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
2043 icmp6_error_set_vnet_buffer (p0, ICMP6_time_exceeded,
2044 ICMP6_time_exceeded_ttl_exceeded_in_transit,
2050 p0->flags &= ~VNET_BUFFER_F_LOCALLY_ORIGINATED;
2055 calc_checksums (vm, p0);
2058 /* Guess we are only writing on simple Ethernet header. */
2059 vnet_rewrite_one_header (adj0[0], ip0, sizeof (ethernet_header_t));
2061 /* Update packet buffer attributes/set output interface. */
2062 rw_len0 = adj0[0].rewrite_header.data_bytes;
2063 vnet_buffer (p0)->ip.save_rewrite_length = rw_len0;
2067 vlib_increment_combined_counter
2068 (&adjacency_counters,
2069 thread_index, adj_index0, 1,
2070 vlib_buffer_length_in_chain (vm, p0) + rw_len0);
2073 /* Check MTU of outgoing interface. */
2075 clib_net_to_host_u16 (ip0->payload_length) +
2076 sizeof (ip6_header_t);
2077 if (p0->flags & VNET_BUFFER_F_GSO)
2078 ip0_len = gso_mtu_sz (p0);
2080 ip6_mtu_check (p0, ip0_len,
2081 adj0[0].rewrite_header.max_l3_packet_bytes,
2082 is_locally_originated0, &next0, is_midchain,
2085 /* Don't adjust the buffer for hop count issue; icmp-error node
2086 * wants to see the IP header */
2087 if (PREDICT_TRUE (error0 == IP6_ERROR_NONE))
2089 p0->current_data -= rw_len0;
2090 p0->current_length += rw_len0;
2092 tx_sw_if_index0 = adj0[0].rewrite_header.sw_if_index;
2094 vnet_buffer (p0)->sw_if_index[VLIB_TX] = tx_sw_if_index0;
2095 next0 = adj0[0].rewrite_header.next_index;
2098 (adj0[0].rewrite_header.flags & VNET_REWRITE_HAS_FEATURES))
2099 vnet_feature_arc_start (lm->output_feature_arc_index,
2100 tx_sw_if_index0, &next0, p0);
2104 p0->error = error_node->errors[error0];
2109 if (adj0->sub_type.midchain.fixup_func)
2110 adj0->sub_type.midchain.fixup_func
2111 (vm, adj0, p0, adj0->sub_type.midchain.fixup_data);
2115 vnet_ip_mcast_fixup_header (IP6_MCAST_ADDR_MASK,
2117 rewrite_header.dst_mcast_offset,
2118 &ip0->dst_address.as_u32[3],
2125 n_left_to_next -= 1;
2127 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
2128 to_next, n_left_to_next,
2132 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2135 /* Need to do trace after rewrites to pick up new packet data. */
2136 if (node->flags & VLIB_NODE_FLAG_TRACE)
2137 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
2139 return frame->n_vectors;
2143 ip6_rewrite_inline (vlib_main_t * vm,
2144 vlib_node_runtime_t * node,
2145 vlib_frame_t * frame,
2146 int do_counters, int is_midchain, int is_mcast)
2148 return ip6_rewrite_inline_with_gso (vm, node, frame, do_counters,
2149 is_midchain, is_mcast);
2152 VLIB_NODE_FN (ip6_rewrite_node) (vlib_main_t * vm,
2153 vlib_node_runtime_t * node,
2154 vlib_frame_t * frame)
2156 if (adj_are_counters_enabled ())
2157 return ip6_rewrite_inline (vm, node, frame, 1, 0, 0);
2159 return ip6_rewrite_inline (vm, node, frame, 0, 0, 0);
2162 VLIB_NODE_FN (ip6_rewrite_bcast_node) (vlib_main_t * vm,
2163 vlib_node_runtime_t * node,
2164 vlib_frame_t * frame)
2166 if (adj_are_counters_enabled ())
2167 return ip6_rewrite_inline (vm, node, frame, 1, 0, 0);
2169 return ip6_rewrite_inline (vm, node, frame, 0, 0, 0);
2172 VLIB_NODE_FN (ip6_rewrite_mcast_node) (vlib_main_t * vm,
2173 vlib_node_runtime_t * node,
2174 vlib_frame_t * frame)
2176 if (adj_are_counters_enabled ())
2177 return ip6_rewrite_inline (vm, node, frame, 1, 0, 1);
2179 return ip6_rewrite_inline (vm, node, frame, 0, 0, 1);
2182 VLIB_NODE_FN (ip6_midchain_node) (vlib_main_t * vm,
2183 vlib_node_runtime_t * node,
2184 vlib_frame_t * frame)
2186 if (adj_are_counters_enabled ())
2187 return ip6_rewrite_inline (vm, node, frame, 1, 1, 0);
2189 return ip6_rewrite_inline (vm, node, frame, 0, 1, 0);
2192 VLIB_NODE_FN (ip6_mcast_midchain_node) (vlib_main_t * vm,
2193 vlib_node_runtime_t * node,
2194 vlib_frame_t * frame)
2196 if (adj_are_counters_enabled ())
2197 return ip6_rewrite_inline (vm, node, frame, 1, 1, 1);
2199 return ip6_rewrite_inline (vm, node, frame, 0, 1, 1);
2203 VLIB_REGISTER_NODE (ip6_midchain_node) =
2205 .name = "ip6-midchain",
2206 .vector_size = sizeof (u32),
2207 .format_trace = format_ip6_forward_next_trace,
2208 .sibling_of = "ip6-rewrite",
2211 VLIB_REGISTER_NODE (ip6_rewrite_node) =
2213 .name = "ip6-rewrite",
2214 .vector_size = sizeof (u32),
2215 .format_trace = format_ip6_rewrite_trace,
2216 .n_next_nodes = IP6_REWRITE_N_NEXT,
2219 [IP6_REWRITE_NEXT_DROP] = "ip6-drop",
2220 [IP6_REWRITE_NEXT_ICMP_ERROR] = "ip6-icmp-error",
2221 [IP6_REWRITE_NEXT_FRAGMENT] = "ip6-frag",
2225 VLIB_REGISTER_NODE (ip6_rewrite_bcast_node) = {
2226 .name = "ip6-rewrite-bcast",
2227 .vector_size = sizeof (u32),
2229 .format_trace = format_ip6_rewrite_trace,
2230 .sibling_of = "ip6-rewrite",
2233 VLIB_REGISTER_NODE (ip6_rewrite_mcast_node) =
2235 .name = "ip6-rewrite-mcast",
2236 .vector_size = sizeof (u32),
2237 .format_trace = format_ip6_rewrite_trace,
2238 .sibling_of = "ip6-rewrite",
2242 VLIB_REGISTER_NODE (ip6_mcast_midchain_node) =
2244 .name = "ip6-mcast-midchain",
2245 .vector_size = sizeof (u32),
2246 .format_trace = format_ip6_rewrite_trace,
2247 .sibling_of = "ip6-rewrite",
2253 * Hop-by-Hop handling
2255 #ifndef CLIB_MARCH_VARIANT
2256 ip6_hop_by_hop_main_t ip6_hop_by_hop_main;
2257 #endif /* CLIB_MARCH_VARIANT */
2259 #define foreach_ip6_hop_by_hop_error \
2260 _(PROCESSED, "pkts with ip6 hop-by-hop options") \
2261 _(FORMAT, "incorrectly formatted hop-by-hop options") \
2262 _(UNKNOWN_OPTION, "unknown ip6 hop-by-hop options")
2267 #define _(sym,str) IP6_HOP_BY_HOP_ERROR_##sym,
2268 foreach_ip6_hop_by_hop_error
2270 IP6_HOP_BY_HOP_N_ERROR,
2271 } ip6_hop_by_hop_error_t;
2275 * Primary h-b-h handler trace support
2276 * We work pretty hard on the problem for obvious reasons
2282 u8 option_data[256];
2283 } ip6_hop_by_hop_trace_t;
2285 extern vlib_node_registration_t ip6_hop_by_hop_node;
2287 static char *ip6_hop_by_hop_error_strings[] = {
2288 #define _(sym,string) string,
2289 foreach_ip6_hop_by_hop_error
2293 #ifndef CLIB_MARCH_VARIANT
2295 format_ip6_hop_by_hop_ext_hdr (u8 * s, va_list * args)
2297 ip6_hop_by_hop_header_t *hbh0 = va_arg (*args, ip6_hop_by_hop_header_t *);
2298 int total_len = va_arg (*args, int);
2299 ip6_hop_by_hop_option_t *opt0, *limit0;
2300 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2303 s = format (s, "IP6_HOP_BY_HOP: next protocol %d len %d total %d",
2304 hbh0->protocol, (hbh0->length + 1) << 3, total_len);
2306 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2307 limit0 = (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 + total_len);
2309 while (opt0 < limit0)
2314 case 0: /* Pad, just stop */
2315 opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0 + 1);
2319 if (hm->trace[type0])
2321 s = (*hm->trace[type0]) (s, opt0);
2326 format (s, "\n unrecognized option %d length %d", type0,
2330 (ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length +
2331 sizeof (ip6_hop_by_hop_option_t));
2340 format_ip6_hop_by_hop_trace (u8 * s, va_list * args)
2342 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
2343 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
2344 ip6_hop_by_hop_trace_t *t = va_arg (*args, ip6_hop_by_hop_trace_t *);
2345 ip6_hop_by_hop_header_t *hbh0;
2346 ip6_hop_by_hop_option_t *opt0, *limit0;
2347 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2351 hbh0 = (ip6_hop_by_hop_header_t *) t->option_data;
2353 s = format (s, "IP6_HOP_BY_HOP: next index %d len %d traced %d",
2354 t->next_index, (hbh0->length + 1) << 3, t->trace_len);
2356 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2357 limit0 = (ip6_hop_by_hop_option_t *) ((u8 *) hbh0) + t->trace_len;
2359 while (opt0 < limit0)
2364 case 0: /* Pad, just stop */
2365 opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0) + 1;
2369 if (hm->trace[type0])
2371 s = (*hm->trace[type0]) (s, opt0);
2376 format (s, "\n unrecognized option %d length %d", type0,
2380 (ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length +
2381 sizeof (ip6_hop_by_hop_option_t));
2389 ip6_scan_hbh_options (vlib_buffer_t * b0,
2391 ip6_hop_by_hop_header_t * hbh0,
2392 ip6_hop_by_hop_option_t * opt0,
2393 ip6_hop_by_hop_option_t * limit0, u32 * next0)
2395 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2399 while (opt0 < limit0)
2405 opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0) + 1;
2410 if (hm->options[type0])
2412 if ((*hm->options[type0]) (b0, ip0, opt0) < 0)
2414 error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2420 /* Unrecognized mandatory option, check the two high order bits */
2421 switch (opt0->type & HBH_OPTION_TYPE_HIGH_ORDER_BITS)
2423 case HBH_OPTION_TYPE_SKIP_UNKNOWN:
2425 case HBH_OPTION_TYPE_DISCARD_UNKNOWN:
2426 error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2427 *next0 = IP_LOOKUP_NEXT_DROP;
2429 case HBH_OPTION_TYPE_DISCARD_UNKNOWN_ICMP:
2430 error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2431 *next0 = IP_LOOKUP_NEXT_ICMP_ERROR;
2432 icmp6_error_set_vnet_buffer (b0, ICMP6_parameter_problem,
2433 ICMP6_parameter_problem_unrecognized_option,
2434 (u8 *) opt0 - (u8 *) ip0);
2436 case HBH_OPTION_TYPE_DISCARD_UNKNOWN_ICMP_NOT_MCAST:
2437 error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2438 if (!ip6_address_is_multicast (&ip0->dst_address))
2440 *next0 = IP_LOOKUP_NEXT_ICMP_ERROR;
2441 icmp6_error_set_vnet_buffer (b0,
2442 ICMP6_parameter_problem,
2443 ICMP6_parameter_problem_unrecognized_option,
2444 (u8 *) opt0 - (u8 *) ip0);
2448 *next0 = IP_LOOKUP_NEXT_DROP;
2456 (ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length +
2457 sizeof (ip6_hop_by_hop_option_t));
2463 * Process the Hop-by-Hop Options header
2465 VLIB_NODE_FN (ip6_hop_by_hop_node) (vlib_main_t * vm,
2466 vlib_node_runtime_t * node,
2467 vlib_frame_t * frame)
2469 vlib_node_runtime_t *error_node =
2470 vlib_node_get_runtime (vm, ip6_hop_by_hop_node.index);
2471 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2472 u32 n_left_from, *from, *to_next;
2473 ip_lookup_next_t next_index;
2475 from = vlib_frame_vector_args (frame);
2476 n_left_from = frame->n_vectors;
2477 next_index = node->cached_next_index;
2479 while (n_left_from > 0)
2483 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
2485 while (n_left_from >= 4 && n_left_to_next >= 2)
2488 vlib_buffer_t *b0, *b1;
2490 ip6_header_t *ip0, *ip1;
2491 ip6_hop_by_hop_header_t *hbh0, *hbh1;
2492 ip6_hop_by_hop_option_t *opt0, *limit0, *opt1, *limit1;
2493 u8 error0 = 0, error1 = 0;
2495 /* Prefetch next iteration. */
2497 vlib_buffer_t *p2, *p3;
2499 p2 = vlib_get_buffer (vm, from[2]);
2500 p3 = vlib_get_buffer (vm, from[3]);
2502 vlib_prefetch_buffer_header (p2, LOAD);
2503 vlib_prefetch_buffer_header (p3, LOAD);
2505 CLIB_PREFETCH (p2->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
2506 CLIB_PREFETCH (p3->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
2509 /* Speculatively enqueue b0, b1 to the current next frame */
2510 to_next[0] = bi0 = from[0];
2511 to_next[1] = bi1 = from[1];
2515 n_left_to_next -= 2;
2517 b0 = vlib_get_buffer (vm, bi0);
2518 b1 = vlib_get_buffer (vm, bi1);
2520 /* Default use the next_index from the adjacency. A HBH option rarely redirects to a different node */
2521 u32 adj_index0 = vnet_buffer (b0)->ip.adj_index[VLIB_TX];
2522 ip_adjacency_t *adj0 = adj_get (adj_index0);
2523 u32 adj_index1 = vnet_buffer (b1)->ip.adj_index[VLIB_TX];
2524 ip_adjacency_t *adj1 = adj_get (adj_index1);
2526 /* Default use the next_index from the adjacency. A HBH option rarely redirects to a different node */
2527 next0 = adj0->lookup_next_index;
2528 next1 = adj1->lookup_next_index;
2530 ip0 = vlib_buffer_get_current (b0);
2531 ip1 = vlib_buffer_get_current (b1);
2532 hbh0 = (ip6_hop_by_hop_header_t *) (ip0 + 1);
2533 hbh1 = (ip6_hop_by_hop_header_t *) (ip1 + 1);
2534 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2535 opt1 = (ip6_hop_by_hop_option_t *) (hbh1 + 1);
2537 (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 +
2538 ((hbh0->length + 1) << 3));
2540 (ip6_hop_by_hop_option_t *) ((u8 *) hbh1 +
2541 ((hbh1->length + 1) << 3));
2544 * Basic validity checks
2546 if ((hbh0->length + 1) << 3 >
2547 clib_net_to_host_u16 (ip0->payload_length))
2549 error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2550 next0 = IP_LOOKUP_NEXT_DROP;
2553 /* Scan the set of h-b-h options, process ones that we understand */
2554 error0 = ip6_scan_hbh_options (b0, ip0, hbh0, opt0, limit0, &next0);
2556 if ((hbh1->length + 1) << 3 >
2557 clib_net_to_host_u16 (ip1->payload_length))
2559 error1 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2560 next1 = IP_LOOKUP_NEXT_DROP;
2563 /* Scan the set of h-b-h options, process ones that we understand */
2564 error1 = ip6_scan_hbh_options (b1, ip1, hbh1, opt1, limit1, &next1);
2567 /* Has the classifier flagged this buffer for special treatment? */
2570 && (vnet_buffer (b0)->l2_classify.opaque_index & OI_DECAP)))
2571 next0 = hm->next_override;
2573 /* Has the classifier flagged this buffer for special treatment? */
2576 && (vnet_buffer (b1)->l2_classify.opaque_index & OI_DECAP)))
2577 next1 = hm->next_override;
2579 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)))
2581 if (b0->flags & VLIB_BUFFER_IS_TRACED)
2583 ip6_hop_by_hop_trace_t *t =
2584 vlib_add_trace (vm, node, b0, sizeof (*t));
2585 u32 trace_len = (hbh0->length + 1) << 3;
2586 t->next_index = next0;
2587 /* Capture the h-b-h option verbatim */
2590 ARRAY_LEN (t->option_data) ? trace_len :
2591 ARRAY_LEN (t->option_data);
2592 t->trace_len = trace_len;
2593 clib_memcpy_fast (t->option_data, hbh0, trace_len);
2595 if (b1->flags & VLIB_BUFFER_IS_TRACED)
2597 ip6_hop_by_hop_trace_t *t =
2598 vlib_add_trace (vm, node, b1, sizeof (*t));
2599 u32 trace_len = (hbh1->length + 1) << 3;
2600 t->next_index = next1;
2601 /* Capture the h-b-h option verbatim */
2604 ARRAY_LEN (t->option_data) ? trace_len :
2605 ARRAY_LEN (t->option_data);
2606 t->trace_len = trace_len;
2607 clib_memcpy_fast (t->option_data, hbh1, trace_len);
2612 b0->error = error_node->errors[error0];
2613 b1->error = error_node->errors[error1];
2615 /* verify speculative enqueue, maybe switch current next frame */
2616 vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
2617 n_left_to_next, bi0, bi1, next0,
2621 while (n_left_from > 0 && n_left_to_next > 0)
2627 ip6_hop_by_hop_header_t *hbh0;
2628 ip6_hop_by_hop_option_t *opt0, *limit0;
2631 /* Speculatively enqueue b0 to the current next frame */
2637 n_left_to_next -= 1;
2639 b0 = vlib_get_buffer (vm, bi0);
2641 * Default use the next_index from the adjacency.
2642 * A HBH option rarely redirects to a different node
2644 u32 adj_index0 = vnet_buffer (b0)->ip.adj_index[VLIB_TX];
2645 ip_adjacency_t *adj0 = adj_get (adj_index0);
2646 next0 = adj0->lookup_next_index;
2648 ip0 = vlib_buffer_get_current (b0);
2649 hbh0 = (ip6_hop_by_hop_header_t *) (ip0 + 1);
2650 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2652 (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 +
2653 ((hbh0->length + 1) << 3));
2656 * Basic validity checks
2658 if ((hbh0->length + 1) << 3 >
2659 clib_net_to_host_u16 (ip0->payload_length))
2661 error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2662 next0 = IP_LOOKUP_NEXT_DROP;
2666 /* Scan the set of h-b-h options, process ones that we understand */
2667 error0 = ip6_scan_hbh_options (b0, ip0, hbh0, opt0, limit0, &next0);
2670 /* Has the classifier flagged this buffer for special treatment? */
2673 && (vnet_buffer (b0)->l2_classify.opaque_index & OI_DECAP)))
2674 next0 = hm->next_override;
2676 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
2678 ip6_hop_by_hop_trace_t *t =
2679 vlib_add_trace (vm, node, b0, sizeof (*t));
2680 u32 trace_len = (hbh0->length + 1) << 3;
2681 t->next_index = next0;
2682 /* Capture the h-b-h option verbatim */
2685 ARRAY_LEN (t->option_data) ? trace_len :
2686 ARRAY_LEN (t->option_data);
2687 t->trace_len = trace_len;
2688 clib_memcpy_fast (t->option_data, hbh0, trace_len);
2691 b0->error = error_node->errors[error0];
2693 /* verify speculative enqueue, maybe switch current next frame */
2694 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
2695 n_left_to_next, bi0, next0);
2697 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2699 return frame->n_vectors;
2703 VLIB_REGISTER_NODE (ip6_hop_by_hop_node) =
2705 .name = "ip6-hop-by-hop",
2706 .sibling_of = "ip6-lookup",
2707 .vector_size = sizeof (u32),
2708 .format_trace = format_ip6_hop_by_hop_trace,
2709 .type = VLIB_NODE_TYPE_INTERNAL,
2710 .n_errors = ARRAY_LEN (ip6_hop_by_hop_error_strings),
2711 .error_strings = ip6_hop_by_hop_error_strings,
2716 static clib_error_t *
2717 ip6_hop_by_hop_init (vlib_main_t * vm)
2719 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2720 clib_memset (hm->options, 0, sizeof (hm->options));
2721 clib_memset (hm->trace, 0, sizeof (hm->trace));
2722 hm->next_override = IP6_LOOKUP_NEXT_POP_HOP_BY_HOP;
2726 VLIB_INIT_FUNCTION (ip6_hop_by_hop_init);
2728 #ifndef CLIB_MARCH_VARIANT
2730 ip6_hbh_set_next_override (uword next)
2732 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2734 hm->next_override = next;
2738 ip6_hbh_register_option (u8 option,
2739 int options (vlib_buffer_t * b, ip6_header_t * ip,
2740 ip6_hop_by_hop_option_t * opt),
2741 u8 * trace (u8 * s, ip6_hop_by_hop_option_t * opt))
2743 ip6_main_t *im = &ip6_main;
2744 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2746 ASSERT ((u32) option < ARRAY_LEN (hm->options));
2748 /* Already registered */
2749 if (hm->options[option])
2752 hm->options[option] = options;
2753 hm->trace[option] = trace;
2755 /* Set global variable */
2756 im->hbh_enabled = 1;
2762 ip6_hbh_unregister_option (u8 option)
2764 ip6_main_t *im = &ip6_main;
2765 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2767 ASSERT ((u32) option < ARRAY_LEN (hm->options));
2769 /* Not registered */
2770 if (!hm->options[option])
2773 hm->options[option] = NULL;
2774 hm->trace[option] = NULL;
2776 /* Disable global knob if this was the last option configured */
2779 for (i = 0; i < 256; i++)
2781 if (hm->options[option])
2788 im->hbh_enabled = 0;
2793 /* Global IP6 main. */
2794 ip6_main_t ip6_main;
2797 static clib_error_t *
2798 ip6_lookup_init (vlib_main_t * vm)
2800 ip6_main_t *im = &ip6_main;
2801 clib_error_t *error;
2804 if ((error = vlib_call_init_function (vm, vnet_feature_init)))
2807 for (i = 0; i < ARRAY_LEN (im->fib_masks); i++)
2814 for (j = 0; j < i0; j++)
2815 im->fib_masks[i].as_u32[j] = ~0;
2818 im->fib_masks[i].as_u32[i0] =
2819 clib_host_to_net_u32 (pow2_mask (i1) << (32 - i1));
2822 ip_lookup_init (&im->lookup_main, /* is_ip6 */ 1);
2824 if (im->lookup_table_nbuckets == 0)
2825 im->lookup_table_nbuckets = IP6_FIB_DEFAULT_HASH_NUM_BUCKETS;
2827 im->lookup_table_nbuckets = 1 << max_log2 (im->lookup_table_nbuckets);
2829 if (im->lookup_table_size == 0)
2830 im->lookup_table_size = IP6_FIB_DEFAULT_HASH_MEMORY_SIZE;
2832 clib_bihash_init_24_8 (&(im->ip6_table[IP6_FIB_TABLE_FWDING].ip6_hash),
2833 "ip6 FIB fwding table",
2834 im->lookup_table_nbuckets, im->lookup_table_size);
2835 clib_bihash_init_24_8 (&im->ip6_table[IP6_FIB_TABLE_NON_FWDING].ip6_hash,
2836 "ip6 FIB non-fwding table",
2837 im->lookup_table_nbuckets, im->lookup_table_size);
2838 clib_bihash_init_40_8 (&im->ip6_mtable.ip6_mhash,
2840 im->lookup_table_nbuckets, im->lookup_table_size);
2842 /* Create FIB with index 0 and table id of 0. */
2843 fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6, 0,
2844 FIB_SOURCE_DEFAULT_ROUTE);
2845 mfib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6, 0,
2846 MFIB_SOURCE_DEFAULT_ROUTE);
2850 pn = pg_get_node (ip6_lookup_node.index);
2851 pn->unformat_edit = unformat_pg_ip6_header;
2854 /* Unless explicitly configured, don't process HBH options */
2855 im->hbh_enabled = 0;
2858 icmp6_neighbor_solicitation_header_t p;
2860 clib_memset (&p, 0, sizeof (p));
2862 p.ip.ip_version_traffic_class_and_flow_label =
2863 clib_host_to_net_u32 (0x6 << 28);
2864 p.ip.payload_length =
2865 clib_host_to_net_u16 (sizeof (p) -
2867 (icmp6_neighbor_solicitation_header_t, neighbor));
2868 p.ip.protocol = IP_PROTOCOL_ICMP6;
2869 p.ip.hop_limit = 255;
2870 ip6_set_solicited_node_multicast_address (&p.ip.dst_address, 0);
2872 p.neighbor.icmp.type = ICMP6_neighbor_solicitation;
2874 p.link_layer_option.header.type =
2875 ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address;
2876 p.link_layer_option.header.n_data_u64s =
2877 sizeof (p.link_layer_option) / sizeof (u64);
2879 vlib_packet_template_init (vm,
2880 &im->discover_neighbor_packet_template,
2882 /* alloc chunk size */ 8,
2883 "ip6 neighbor discovery");
2889 VLIB_INIT_FUNCTION (ip6_lookup_init);
2891 static clib_error_t *
2892 test_ip6_link_command_fn (vlib_main_t * vm,
2893 unformat_input_t * input, vlib_cli_command_t * cmd)
2896 ip6_address_t _a, *a = &_a;
2898 if (unformat (input, "%U", unformat_ethernet_address, mac))
2900 ip6_link_local_address_from_ethernet_mac_address (a, mac);
2901 vlib_cli_output (vm, "Link local address: %U", format_ip6_address, a);
2902 ip6_ethernet_mac_address_from_link_local_address (mac, a);
2903 vlib_cli_output (vm, "Original MAC address: %U",
2904 format_ethernet_address, mac);
2911 * This command converts the given MAC Address into an IPv6 link-local
2915 * Example of how to create an IPv6 link-local address:
2916 * @cliexstart{test ip6 link 16:d9:e0:91:79:86}
2917 * Link local address: fe80::14d9:e0ff:fe91:7986
2918 * Original MAC address: 16:d9:e0:91:79:86
2922 VLIB_CLI_COMMAND (test_link_command, static) =
2924 .path = "test ip6 link",
2925 .function = test_ip6_link_command_fn,
2926 .short_help = "test ip6 link <mac-address>",
2930 #ifndef CLIB_MARCH_VARIANT
2932 vnet_set_ip6_flow_hash (u32 table_id, u32 flow_hash_config)
2936 fib_index = fib_table_find (FIB_PROTOCOL_IP6, table_id);
2938 if (~0 == fib_index)
2939 return VNET_API_ERROR_NO_SUCH_FIB;
2941 fib_table_set_flow_hash_config (fib_index, FIB_PROTOCOL_IP6,
2948 static clib_error_t *
2949 set_ip6_flow_hash_command_fn (vlib_main_t * vm,
2950 unformat_input_t * input,
2951 vlib_cli_command_t * cmd)
2955 u32 flow_hash_config = 0;
2958 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
2960 if (unformat (input, "table %d", &table_id))
2963 else if (unformat (input, #a)) { flow_hash_config |= v; matched=1;}
2964 foreach_flow_hash_bit
2971 return clib_error_return (0, "unknown input `%U'",
2972 format_unformat_error, input);
2974 rv = vnet_set_ip6_flow_hash (table_id, flow_hash_config);
2981 return clib_error_return (0, "no such FIB table %d", table_id);
2984 clib_warning ("BUG: illegal flow hash config 0x%x", flow_hash_config);
2992 * Configure the set of IPv6 fields used by the flow hash.
2996 * Example of how to set the flow hash on a given table:
2997 * @cliexcmd{set ip6 flow-hash table 8 dst sport dport proto}
2999 * Example of display the configured flow hash:
3000 * @cliexstart{show ip6 fib}
3001 * ipv6-VRF:0, fib_index 0, flow hash: src dst sport dport proto
3004 * [@0]: dpo-load-balance: [index:5 buckets:1 uRPF:5 to:[0:0]]
3005 * [0] [@0]: dpo-drop ip6
3008 * [@0]: dpo-load-balance: [index:10 buckets:1 uRPF:10 to:[0:0]]
3009 * [0] [@2]: dpo-receive
3012 * [@0]: dpo-load-balance: [index:8 buckets:1 uRPF:8 to:[0:0]]
3013 * [0] [@2]: dpo-receive
3016 * [@0]: dpo-load-balance: [index:7 buckets:1 uRPF:7 to:[0:0]]
3017 * [0] [@2]: dpo-receive
3020 * [@0]: dpo-load-balance: [index:9 buckets:1 uRPF:9 to:[0:0]]
3021 * [0] [@2]: dpo-receive
3022 * ff02::1:ff00:0/104
3024 * [@0]: dpo-load-balance: [index:6 buckets:1 uRPF:6 to:[0:0]]
3025 * [0] [@2]: dpo-receive
3026 * ipv6-VRF:8, fib_index 1, flow hash: dst sport dport proto
3029 * [@0]: dpo-load-balance: [index:21 buckets:1 uRPF:20 to:[0:0]]
3030 * [0] [@0]: dpo-drop ip6
3033 * [@0]: dpo-load-balance: [index:27 buckets:1 uRPF:26 to:[0:0]]
3034 * [0] [@4]: ipv6-glean: af_packet0
3037 * [@0]: dpo-load-balance: [index:28 buckets:1 uRPF:27 to:[0:0]]
3038 * [0] [@2]: dpo-receive: @::a:1:1:0:7 on af_packet0
3041 * [@0]: dpo-load-balance: [index:26 buckets:1 uRPF:25 to:[0:0]]
3042 * [0] [@2]: dpo-receive
3043 * fe80::fe:3eff:fe3e:9222/128
3045 * [@0]: dpo-load-balance: [index:29 buckets:1 uRPF:28 to:[0:0]]
3046 * [0] [@2]: dpo-receive: fe80::fe:3eff:fe3e:9222 on af_packet0
3049 * [@0]: dpo-load-balance: [index:24 buckets:1 uRPF:23 to:[0:0]]
3050 * [0] [@2]: dpo-receive
3053 * [@0]: dpo-load-balance: [index:23 buckets:1 uRPF:22 to:[0:0]]
3054 * [0] [@2]: dpo-receive
3057 * [@0]: dpo-load-balance: [index:25 buckets:1 uRPF:24 to:[0:0]]
3058 * [0] [@2]: dpo-receive
3059 * ff02::1:ff00:0/104
3061 * [@0]: dpo-load-balance: [index:22 buckets:1 uRPF:21 to:[0:0]]
3062 * [0] [@2]: dpo-receive
3067 VLIB_CLI_COMMAND (set_ip6_flow_hash_command, static) =
3069 .path = "set ip6 flow-hash",
3071 "set ip6 flow-hash table <table-id> [src] [dst] [sport] [dport] [proto] [reverse]",
3072 .function = set_ip6_flow_hash_command_fn,
3076 static clib_error_t *
3077 show_ip6_local_command_fn (vlib_main_t * vm,
3078 unformat_input_t * input, vlib_cli_command_t * cmd)
3080 ip6_main_t *im = &ip6_main;
3081 ip_lookup_main_t *lm = &im->lookup_main;
3084 vlib_cli_output (vm, "Protocols handled by ip6_local");
3085 for (i = 0; i < ARRAY_LEN (lm->local_next_by_ip_protocol); i++)
3087 if (lm->local_next_by_ip_protocol[i] != IP_LOCAL_NEXT_PUNT)
3090 u32 node_index = vlib_get_node (vm,
3091 ip6_local_node.index)->
3092 next_nodes[lm->local_next_by_ip_protocol[i]];
3093 vlib_cli_output (vm, "%d: %U", i, format_vlib_node_name, vm,
3103 * Display the set of protocols handled by the local IPv6 stack.
3106 * Example of how to display local protocol table:
3107 * @cliexstart{show ip6 local}
3108 * Protocols handled by ip6_local
3116 VLIB_CLI_COMMAND (show_ip6_local, static) =
3118 .path = "show ip6 local",
3119 .function = show_ip6_local_command_fn,
3120 .short_help = "show ip6 local",
3124 #ifndef CLIB_MARCH_VARIANT
3126 vnet_set_ip6_classify_intfc (vlib_main_t * vm, u32 sw_if_index,
3129 vnet_main_t *vnm = vnet_get_main ();
3130 vnet_interface_main_t *im = &vnm->interface_main;
3131 ip6_main_t *ipm = &ip6_main;
3132 ip_lookup_main_t *lm = &ipm->lookup_main;
3133 vnet_classify_main_t *cm = &vnet_classify_main;
3134 ip6_address_t *if_addr;
3136 if (pool_is_free_index (im->sw_interfaces, sw_if_index))
3137 return VNET_API_ERROR_NO_MATCHING_INTERFACE;
3139 if (table_index != ~0 && pool_is_free_index (cm->tables, table_index))
3140 return VNET_API_ERROR_NO_SUCH_ENTRY;
3142 vec_validate (lm->classify_table_index_by_sw_if_index, sw_if_index);
3143 lm->classify_table_index_by_sw_if_index[sw_if_index] = table_index;
3145 if_addr = ip6_interface_first_address (ipm, sw_if_index);
3147 if (NULL != if_addr)
3149 fib_prefix_t pfx = {
3151 .fp_proto = FIB_PROTOCOL_IP6,
3152 .fp_addr.ip6 = *if_addr,
3156 fib_index = fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4,
3160 if (table_index != (u32) ~ 0)
3162 dpo_id_t dpo = DPO_INVALID;
3167 classify_dpo_create (DPO_PROTO_IP6, table_index));
3169 fib_table_entry_special_dpo_add (fib_index,
3171 FIB_SOURCE_CLASSIFY,
3172 FIB_ENTRY_FLAG_NONE, &dpo);
3177 fib_table_entry_special_remove (fib_index,
3178 &pfx, FIB_SOURCE_CLASSIFY);
3186 static clib_error_t *
3187 set_ip6_classify_command_fn (vlib_main_t * vm,
3188 unformat_input_t * input,
3189 vlib_cli_command_t * cmd)
3191 u32 table_index = ~0;
3192 int table_index_set = 0;
3193 u32 sw_if_index = ~0;
3196 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
3198 if (unformat (input, "table-index %d", &table_index))
3199 table_index_set = 1;
3200 else if (unformat (input, "intfc %U", unformat_vnet_sw_interface,
3201 vnet_get_main (), &sw_if_index))
3207 if (table_index_set == 0)
3208 return clib_error_return (0, "classify table-index must be specified");
3210 if (sw_if_index == ~0)
3211 return clib_error_return (0, "interface / subif must be specified");
3213 rv = vnet_set_ip6_classify_intfc (vm, sw_if_index, table_index);
3220 case VNET_API_ERROR_NO_MATCHING_INTERFACE:
3221 return clib_error_return (0, "No such interface");
3223 case VNET_API_ERROR_NO_SUCH_ENTRY:
3224 return clib_error_return (0, "No such classifier table");
3230 * Assign a classification table to an interface. The classification
3231 * table is created using the '<em>classify table</em>' and '<em>classify session</em>'
3232 * commands. Once the table is create, use this command to filter packets
3236 * Example of how to assign a classification table to an interface:
3237 * @cliexcmd{set ip6 classify intfc GigabitEthernet2/0/0 table-index 1}
3240 VLIB_CLI_COMMAND (set_ip6_classify_command, static) =
3242 .path = "set ip6 classify",
3244 "set ip6 classify intfc <interface> table-index <classify-idx>",
3245 .function = set_ip6_classify_command_fn,
3249 static clib_error_t *
3250 ip6_config (vlib_main_t * vm, unformat_input_t * input)
3252 ip6_main_t *im = &ip6_main;
3257 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
3259 if (unformat (input, "hash-buckets %d", &tmp))
3261 else if (unformat (input, "heap-size %U",
3262 unformat_memory_size, &heapsize))
3265 return clib_error_return (0, "unknown input '%U'",
3266 format_unformat_error, input);
3269 im->lookup_table_nbuckets = nbuckets;
3270 im->lookup_table_size = heapsize;
3275 VLIB_EARLY_CONFIG_FUNCTION (ip6_config, "ip6");
3278 * fd.io coding-style-patch-verification: ON
3281 * eval: (c-set-style "gnu")