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>
52 #include <vnet/classify/vnet_classify.h>
54 #ifndef CLIB_MARCH_VARIANT
55 #include <vppinfra/bihash_template.c>
57 #include <vnet/ip/ip6_forward.h>
58 #include <vnet/interface_output.h>
60 /* Flag used by IOAM code. Classifier sets it pop-hop-by-hop checks it */
61 #define OI_DECAP 0x80000000
64 ip6_add_interface_prefix_routes (ip6_main_t * im,
67 ip6_address_t * address, u32 address_length)
69 ip_lookup_main_t *lm = &im->lookup_main;
70 ip_interface_prefix_t *if_prefix;
73 ip_interface_prefix_key_t key = {
75 .fp_len = address_length,
76 .fp_proto = FIB_PROTOCOL_IP6,
79 address->as_u64[0] & im->fib_masks[address_length].as_u64[0],
80 address->as_u64[1] & im->fib_masks[address_length].as_u64[1],
84 .sw_if_index = sw_if_index,
88 /* If prefix already set on interface, just increment ref count & return */
89 if_prefix = ip_get_interface_prefix (lm, &key);
92 if_prefix->ref_count += 1;
96 /* New prefix - allocate a pool entry, initialize it, add to the hash */
97 pool_get (lm->if_prefix_pool, if_prefix);
98 if_prefix->ref_count = 1;
99 clib_memcpy (&if_prefix->key, &key, sizeof (key));
100 mhash_set (&lm->prefix_to_if_prefix_index, &key,
101 if_prefix - lm->if_prefix_pool, 0 /* old value */ );
103 /* length < 128 - add glean */
104 if (address_length < 128)
106 /* set the glean route for the prefix */
107 fib_table_entry_update_one_path (fib_index, &key.prefix,
108 FIB_SOURCE_INTERFACE,
109 (FIB_ENTRY_FLAG_CONNECTED |
110 FIB_ENTRY_FLAG_ATTACHED),
112 /* No next-hop address */
114 /* invalid FIB index */
116 /* no out-label stack */
117 NULL, FIB_ROUTE_PATH_FLAG_NONE);
122 ip6_add_interface_routes (vnet_main_t * vnm, u32 sw_if_index,
123 ip6_main_t * im, u32 fib_index,
124 ip_interface_address_t * a)
126 ip_lookup_main_t *lm = &im->lookup_main;
127 ip6_address_t *address = ip_interface_address_get_address (lm, a);
129 .fp_len = a->address_length,
130 .fp_proto = FIB_PROTOCOL_IP6,
131 .fp_addr.ip6 = *address,
134 /* set special routes for the prefix if needed */
135 ip6_add_interface_prefix_routes (im, sw_if_index, fib_index,
136 address, a->address_length);
139 if (sw_if_index < vec_len (lm->classify_table_index_by_sw_if_index))
141 u32 classify_table_index =
142 lm->classify_table_index_by_sw_if_index[sw_if_index];
143 if (classify_table_index != (u32) ~ 0)
145 dpo_id_t dpo = DPO_INVALID;
150 classify_dpo_create (DPO_PROTO_IP6, classify_table_index));
152 fib_table_entry_special_dpo_add (fib_index,
155 FIB_ENTRY_FLAG_NONE, &dpo);
160 fib_table_entry_update_one_path (fib_index, &pfx,
161 FIB_SOURCE_INTERFACE,
162 (FIB_ENTRY_FLAG_CONNECTED |
163 FIB_ENTRY_FLAG_LOCAL),
167 1, NULL, FIB_ROUTE_PATH_FLAG_NONE);
171 ip6_del_interface_prefix_routes (ip6_main_t * im,
174 ip6_address_t * address, u32 address_length)
176 ip_lookup_main_t *lm = &im->lookup_main;
177 ip_interface_prefix_t *if_prefix;
180 ip_interface_prefix_key_t key = {
182 .fp_len = address_length,
183 .fp_proto = FIB_PROTOCOL_IP6,
186 address->as_u64[0] & im->fib_masks[address_length].as_u64[0],
187 address->as_u64[1] & im->fib_masks[address_length].as_u64[1],
191 .sw_if_index = sw_if_index,
195 if_prefix = ip_get_interface_prefix (lm, &key);
198 clib_warning ("Prefix not found while deleting %U",
199 format_ip4_address_and_length, address, address_length);
203 /* If not deleting last intf addr in prefix, decrement ref count & return */
204 if_prefix->ref_count -= 1;
205 if (if_prefix->ref_count > 0)
208 /* length <= 128, delete glean route */
209 if (address_length <= 128)
211 /* remove glean route for prefix */
212 fib_table_entry_delete (fib_index, &key.prefix, FIB_SOURCE_INTERFACE);
215 mhash_unset (&lm->prefix_to_if_prefix_index, &key, 0 /* old_value */ );
216 pool_put (lm->if_prefix_pool, if_prefix);
220 ip6_del_interface_routes (u32 sw_if_index, ip6_main_t * im,
222 ip6_address_t * address, u32 address_length)
226 .fp_proto = FIB_PROTOCOL_IP6,
227 .fp_addr.ip6 = *address,
230 /* delete special routes for the prefix if needed */
231 ip6_del_interface_prefix_routes (im, sw_if_index, fib_index,
232 address, address_length);
234 fib_table_entry_delete (fib_index, &pfx, FIB_SOURCE_INTERFACE);
237 #ifndef CLIB_MARCH_VARIANT
239 ip6_sw_interface_enable_disable (u32 sw_if_index, u32 is_enable)
241 ip6_main_t *im = &ip6_main;
243 vec_validate_init_empty (im->ip_enabled_by_sw_if_index, sw_if_index, 0);
246 * enable/disable only on the 1<->0 transition
250 if (1 != ++im->ip_enabled_by_sw_if_index[sw_if_index])
255 /* The ref count is 0 when an address is removed from an interface that has
256 * no address - this is not a ciritical error */
257 if (0 == im->ip_enabled_by_sw_if_index[sw_if_index] ||
258 0 != --im->ip_enabled_by_sw_if_index[sw_if_index])
262 vnet_feature_enable_disable ("ip6-unicast", "ip6-not-enabled", sw_if_index,
265 vnet_feature_enable_disable ("ip6-multicast", "ip6-not-enabled",
266 sw_if_index, !is_enable, 0, 0);
269 /* get first interface address */
271 ip6_interface_first_address (ip6_main_t * im, u32 sw_if_index)
273 ip_lookup_main_t *lm = &im->lookup_main;
274 ip_interface_address_t *ia = 0;
275 ip6_address_t *result = 0;
278 foreach_ip_interface_address (lm, ia, sw_if_index,
279 1 /* honor unnumbered */,
281 ip6_address_t * a = ip_interface_address_get_address (lm, ia);
290 ip6_add_del_interface_address (vlib_main_t * vm,
292 ip6_address_t * address,
293 u32 address_length, u32 is_del)
295 vnet_main_t *vnm = vnet_get_main ();
296 ip6_main_t *im = &ip6_main;
297 ip_lookup_main_t *lm = &im->lookup_main;
299 u32 if_address_index;
300 ip6_address_fib_t ip6_af, *addr_fib = 0;
301 const ip6_address_t *ll_addr;
303 /* local0 interface doesn't support IP addressing */
304 if (sw_if_index == 0)
307 clib_error_create ("local0 interface doesn't support IP addressing");
310 if (ip6_address_is_link_local_unicast (address))
312 if (address_length != 128)
314 vnm->api_errno = VNET_API_ERROR_ADDRESS_LENGTH_MISMATCH;
317 ("prefix length of link-local address must be 128");
323 rv = ip6_set_link_local_address (sw_if_index, address);
328 return clib_error_create ("address not assignable");
333 ll_addr = ip6_get_link_local_address (sw_if_index);
334 if (ip6_address_is_equal (ll_addr, address))
336 vnm->api_errno = VNET_API_ERROR_ADDRESS_NOT_DELETABLE;
337 return clib_error_create ("address not deletable");
341 vnm->api_errno = VNET_API_ERROR_ADDRESS_NOT_FOUND_FOR_INTERFACE;
342 return clib_error_create ("address not found");
347 vec_validate (im->fib_index_by_sw_if_index, sw_if_index);
348 vec_validate (im->mfib_index_by_sw_if_index, sw_if_index);
350 ip6_addr_fib_init (&ip6_af, address,
351 vec_elt (im->fib_index_by_sw_if_index, sw_if_index));
352 vec_add1 (addr_fib, ip6_af);
357 /* When adding an address check that it does not conflict
358 with an existing address on any interface in this table. */
359 ip_interface_address_t *ia;
360 vnet_sw_interface_t *sif;
362 pool_foreach(sif, vnm->interface_main.sw_interfaces,
364 if (im->fib_index_by_sw_if_index[sw_if_index] ==
365 im->fib_index_by_sw_if_index[sif->sw_if_index])
367 foreach_ip_interface_address
368 (&im->lookup_main, ia, sif->sw_if_index,
369 0 /* honor unnumbered */ ,
372 ip_interface_address_get_address
373 (&im->lookup_main, ia);
374 if (ip6_destination_matches_route
375 (im, address, x, ia->address_length) ||
376 ip6_destination_matches_route (im,
381 /* an intf may have >1 addr from the same prefix */
382 if ((sw_if_index == sif->sw_if_index) &&
383 (ia->address_length == address_length) &&
384 !ip6_address_is_equal (x, address))
387 /* error if the length or intf was different */
388 vnm->api_errno = VNET_API_ERROR_DUPLICATE_IF_ADDRESS;
391 ("failed to add %U which conflicts with %U for interface %U",
392 format_ip6_address_and_length, address,
394 format_ip6_address_and_length, x,
396 format_vnet_sw_if_index_name, vnm,
406 uword elts_before = pool_elts (lm->if_address_pool);
408 error = ip_interface_address_add_del
409 (lm, sw_if_index, addr_fib, address_length, is_del, &if_address_index);
413 /* Pool did not grow: add duplicate address. */
414 if (elts_before == pool_elts (lm->if_address_pool))
418 ip6_sw_interface_enable_disable (sw_if_index, !is_del);
420 ip6_link_enable (sw_if_index);
422 /* intf addr routes are added/deleted on admin up/down */
423 if (vnet_sw_interface_is_admin_up (vnm, sw_if_index))
426 ip6_del_interface_routes (sw_if_index,
427 im, ip6_af.fib_index, address,
430 ip6_add_interface_routes (vnm, sw_if_index,
431 im, ip6_af.fib_index,
432 pool_elt_at_index (lm->if_address_pool,
436 ip6_add_del_interface_address_callback_t *cb;
437 vec_foreach (cb, im->add_del_interface_address_callbacks)
438 cb->function (im, cb->function_opaque, sw_if_index,
439 address, address_length, if_address_index, is_del);
442 ip6_link_disable (sw_if_index);
451 static clib_error_t *
452 ip6_sw_interface_admin_up_down (vnet_main_t * vnm, u32 sw_if_index, u32 flags)
454 ip6_main_t *im = &ip6_main;
455 ip_interface_address_t *ia;
457 u32 is_admin_up, fib_index;
459 /* Fill in lookup tables with default table (0). */
460 vec_validate (im->fib_index_by_sw_if_index, sw_if_index);
462 vec_validate_init_empty (im->
463 lookup_main.if_address_pool_index_by_sw_if_index,
466 is_admin_up = (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) != 0;
468 fib_index = vec_elt (im->fib_index_by_sw_if_index, sw_if_index);
471 foreach_ip_interface_address (&im->lookup_main, ia, sw_if_index,
472 0 /* honor unnumbered */,
474 a = ip_interface_address_get_address (&im->lookup_main, ia);
476 ip6_add_interface_routes (vnm, sw_if_index,
480 ip6_del_interface_routes (sw_if_index, im, fib_index,
481 a, ia->address_length);
488 VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION (ip6_sw_interface_admin_up_down);
490 /* Built-in ip6 unicast rx feature path definition */
492 VNET_FEATURE_ARC_INIT (ip6_unicast, static) =
494 .arc_name = "ip6-unicast",
495 .start_nodes = VNET_FEATURES ("ip6-input"),
496 .last_in_arc = "ip6-lookup",
497 .arc_index_ptr = &ip6_main.lookup_main.ucast_feature_arc_index,
500 VNET_FEATURE_INIT (ip6_flow_classify, static) =
502 .arc_name = "ip6-unicast",
503 .node_name = "ip6-flow-classify",
504 .runs_before = VNET_FEATURES ("ip6-inacl"),
507 VNET_FEATURE_INIT (ip6_inacl, static) =
509 .arc_name = "ip6-unicast",
510 .node_name = "ip6-inacl",
511 .runs_before = VNET_FEATURES ("ip6-policer-classify"),
514 VNET_FEATURE_INIT (ip6_policer_classify, static) =
516 .arc_name = "ip6-unicast",
517 .node_name = "ip6-policer-classify",
518 .runs_before = VNET_FEATURES ("ipsec6-input-feature"),
521 VNET_FEATURE_INIT (ip6_ipsec, static) =
523 .arc_name = "ip6-unicast",
524 .node_name = "ipsec6-input-feature",
525 .runs_before = VNET_FEATURES ("l2tp-decap"),
528 VNET_FEATURE_INIT (ip6_l2tp, static) =
530 .arc_name = "ip6-unicast",
531 .node_name = "l2tp-decap",
532 .runs_before = VNET_FEATURES ("vpath-input-ip6"),
535 VNET_FEATURE_INIT (ip6_vpath, static) =
537 .arc_name = "ip6-unicast",
538 .node_name = "vpath-input-ip6",
539 .runs_before = VNET_FEATURES ("ip6-vxlan-bypass"),
542 VNET_FEATURE_INIT (ip6_vxlan_bypass, static) =
544 .arc_name = "ip6-unicast",
545 .node_name = "ip6-vxlan-bypass",
546 .runs_before = VNET_FEATURES ("ip6-lookup"),
549 VNET_FEATURE_INIT (ip6_not_enabled, static) =
551 .arc_name = "ip6-unicast",
552 .node_name = "ip6-not-enabled",
553 .runs_before = VNET_FEATURES ("ip6-lookup"),
556 VNET_FEATURE_INIT (ip6_lookup, static) =
558 .arc_name = "ip6-unicast",
559 .node_name = "ip6-lookup",
560 .runs_before = 0, /*last feature*/
563 /* Built-in ip6 multicast rx feature path definition (none now) */
564 VNET_FEATURE_ARC_INIT (ip6_multicast, static) =
566 .arc_name = "ip6-multicast",
567 .start_nodes = VNET_FEATURES ("ip6-input"),
568 .last_in_arc = "ip6-mfib-forward-lookup",
569 .arc_index_ptr = &ip6_main.lookup_main.mcast_feature_arc_index,
572 VNET_FEATURE_INIT (ip6_vpath_mc, static) = {
573 .arc_name = "ip6-multicast",
574 .node_name = "vpath-input-ip6",
575 .runs_before = VNET_FEATURES ("ip6-mfib-forward-lookup"),
578 VNET_FEATURE_INIT (ip6_not_enabled_mc, static) = {
579 .arc_name = "ip6-multicast",
580 .node_name = "ip6-not-enabled",
581 .runs_before = VNET_FEATURES ("ip6-mfib-forward-lookup"),
584 VNET_FEATURE_INIT (ip6_mc_lookup, static) = {
585 .arc_name = "ip6-multicast",
586 .node_name = "ip6-mfib-forward-lookup",
587 .runs_before = 0, /* last feature */
590 /* Built-in ip4 tx feature path definition */
591 VNET_FEATURE_ARC_INIT (ip6_output, static) =
593 .arc_name = "ip6-output",
594 .start_nodes = VNET_FEATURES ("ip6-rewrite", "ip6-midchain", "ip6-dvr-dpo"),
595 .last_in_arc = "interface-output",
596 .arc_index_ptr = &ip6_main.lookup_main.output_feature_arc_index,
599 VNET_FEATURE_INIT (ip6_outacl, static) = {
600 .arc_name = "ip6-output",
601 .node_name = "ip6-outacl",
602 .runs_before = VNET_FEATURES ("ipsec6-output-feature"),
605 VNET_FEATURE_INIT (ip6_ipsec_output, static) = {
606 .arc_name = "ip6-output",
607 .node_name = "ipsec6-output-feature",
608 .runs_before = VNET_FEATURES ("interface-output"),
611 VNET_FEATURE_INIT (ip6_interface_output, static) = {
612 .arc_name = "ip6-output",
613 .node_name = "interface-output",
614 .runs_before = 0, /* not before any other features */
618 static clib_error_t *
619 ip6_sw_interface_add_del (vnet_main_t * vnm, u32 sw_if_index, u32 is_add)
621 ip6_main_t *im = &ip6_main;
623 vec_validate (im->fib_index_by_sw_if_index, sw_if_index);
624 vec_validate (im->mfib_index_by_sw_if_index, sw_if_index);
628 /* Ensure that IPv6 is disabled */
629 ip6_main_t *im6 = &ip6_main;
630 ip_lookup_main_t *lm6 = &im6->lookup_main;
631 ip_interface_address_t *ia = 0;
632 ip6_address_t *address;
633 vlib_main_t *vm = vlib_get_main ();
635 vnet_sw_interface_update_unnumbered (sw_if_index, ~0, 0);
637 foreach_ip_interface_address (lm6, ia, sw_if_index, 0,
639 address = ip_interface_address_get_address (lm6, ia);
640 ip6_add_del_interface_address(vm, sw_if_index, address, ia->address_length, 1);
643 ip6_mfib_interface_enable_disable (sw_if_index, 0);
646 vnet_feature_enable_disable ("ip6-unicast", "ip6-not-enabled", sw_if_index,
649 vnet_feature_enable_disable ("ip6-multicast", "ip6-not-enabled",
650 sw_if_index, is_add, 0, 0);
652 return /* no error */ 0;
655 VNET_SW_INTERFACE_ADD_DEL_FUNCTION (ip6_sw_interface_add_del);
657 VLIB_NODE_FN (ip6_lookup_node) (vlib_main_t * vm,
658 vlib_node_runtime_t * node,
659 vlib_frame_t * frame)
661 return ip6_lookup_inline (vm, node, frame);
664 static u8 *format_ip6_lookup_trace (u8 * s, va_list * args);
667 VLIB_REGISTER_NODE (ip6_lookup_node) =
669 .name = "ip6-lookup",
670 .vector_size = sizeof (u32),
671 .format_trace = format_ip6_lookup_trace,
672 .n_next_nodes = IP6_LOOKUP_N_NEXT,
673 .next_nodes = IP6_LOOKUP_NEXT_NODES,
677 VLIB_NODE_FN (ip6_load_balance_node) (vlib_main_t * vm,
678 vlib_node_runtime_t * node,
679 vlib_frame_t * frame)
681 vlib_combined_counter_main_t *cm = &load_balance_main.lbm_via_counters;
683 u32 thread_index = vm->thread_index;
684 ip6_main_t *im = &ip6_main;
685 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs;
686 u16 nexts[VLIB_FRAME_SIZE], *next;
688 from = vlib_frame_vector_args (frame);
689 n_left = frame->n_vectors;
692 vlib_get_buffers (vm, from, bufs, n_left);
696 const load_balance_t *lb0, *lb1;
697 const ip6_header_t *ip0, *ip1;
698 u32 lbi0, hc0, lbi1, hc1;
699 const dpo_id_t *dpo0, *dpo1;
701 /* Prefetch next iteration. */
703 vlib_prefetch_buffer_header (b[2], STORE);
704 vlib_prefetch_buffer_header (b[3], STORE);
706 CLIB_PREFETCH (b[2]->data, sizeof (ip0[0]), STORE);
707 CLIB_PREFETCH (b[3]->data, sizeof (ip0[0]), STORE);
710 ip0 = vlib_buffer_get_current (b[0]);
711 ip1 = vlib_buffer_get_current (b[1]);
712 lbi0 = vnet_buffer (b[0])->ip.adj_index[VLIB_TX];
713 lbi1 = vnet_buffer (b[1])->ip.adj_index[VLIB_TX];
715 lb0 = load_balance_get (lbi0);
716 lb1 = load_balance_get (lbi1);
719 * this node is for via FIBs we can re-use the hash value from the
720 * to node if present.
721 * We don't want to use the same hash value at each level in the recursion
722 * graph as that would lead to polarisation
726 if (PREDICT_FALSE (lb0->lb_n_buckets > 1))
728 if (PREDICT_TRUE (vnet_buffer (b[0])->ip.flow_hash))
730 hc0 = vnet_buffer (b[0])->ip.flow_hash =
731 vnet_buffer (b[0])->ip.flow_hash >> 1;
735 hc0 = vnet_buffer (b[0])->ip.flow_hash =
736 ip6_compute_flow_hash (ip0, lb0->lb_hash_config);
738 dpo0 = load_balance_get_fwd_bucket
739 (lb0, (hc0 & (lb0->lb_n_buckets_minus_1)));
743 dpo0 = load_balance_get_bucket_i (lb0, 0);
745 if (PREDICT_FALSE (lb1->lb_n_buckets > 1))
747 if (PREDICT_TRUE (vnet_buffer (b[1])->ip.flow_hash))
749 hc1 = vnet_buffer (b[1])->ip.flow_hash =
750 vnet_buffer (b[1])->ip.flow_hash >> 1;
754 hc1 = vnet_buffer (b[1])->ip.flow_hash =
755 ip6_compute_flow_hash (ip1, lb1->lb_hash_config);
757 dpo1 = load_balance_get_fwd_bucket
758 (lb1, (hc1 & (lb1->lb_n_buckets_minus_1)));
762 dpo1 = load_balance_get_bucket_i (lb1, 0);
765 next[0] = dpo0->dpoi_next_node;
766 next[1] = dpo1->dpoi_next_node;
768 /* Only process the HBH Option Header if explicitly configured to do so */
769 if (PREDICT_FALSE (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
771 next[0] = (dpo_is_adj (dpo0) && im->hbh_enabled) ?
772 (ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next[0];
774 /* Only process the HBH Option Header if explicitly configured to do so */
775 if (PREDICT_FALSE (ip1->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
777 next[1] = (dpo_is_adj (dpo1) && im->hbh_enabled) ?
778 (ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next[1];
781 vnet_buffer (b[0])->ip.adj_index[VLIB_TX] = dpo0->dpoi_index;
782 vnet_buffer (b[1])->ip.adj_index[VLIB_TX] = dpo1->dpoi_index;
784 vlib_increment_combined_counter
785 (cm, thread_index, lbi0, 1, vlib_buffer_length_in_chain (vm, b[0]));
786 vlib_increment_combined_counter
787 (cm, thread_index, lbi1, 1, vlib_buffer_length_in_chain (vm, b[1]));
796 const load_balance_t *lb0;
797 const ip6_header_t *ip0;
798 const dpo_id_t *dpo0;
801 ip0 = vlib_buffer_get_current (b[0]);
802 lbi0 = vnet_buffer (b[0])->ip.adj_index[VLIB_TX];
804 lb0 = load_balance_get (lbi0);
807 if (PREDICT_FALSE (lb0->lb_n_buckets > 1))
809 if (PREDICT_TRUE (vnet_buffer (b[0])->ip.flow_hash))
811 hc0 = vnet_buffer (b[0])->ip.flow_hash =
812 vnet_buffer (b[0])->ip.flow_hash >> 1;
816 hc0 = vnet_buffer (b[0])->ip.flow_hash =
817 ip6_compute_flow_hash (ip0, lb0->lb_hash_config);
819 dpo0 = load_balance_get_fwd_bucket
820 (lb0, (hc0 & (lb0->lb_n_buckets_minus_1)));
824 dpo0 = load_balance_get_bucket_i (lb0, 0);
827 next[0] = dpo0->dpoi_next_node;
828 vnet_buffer (b[0])->ip.adj_index[VLIB_TX] = dpo0->dpoi_index;
830 /* Only process the HBH Option Header if explicitly configured to do so */
831 if (PREDICT_FALSE (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
833 next[0] = (dpo_is_adj (dpo0) && im->hbh_enabled) ?
834 (ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next[0];
837 vlib_increment_combined_counter
838 (cm, thread_index, lbi0, 1, vlib_buffer_length_in_chain (vm, b[0]));
845 vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors);
847 if (node->flags & VLIB_NODE_FLAG_TRACE)
848 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
850 return frame->n_vectors;
854 VLIB_REGISTER_NODE (ip6_load_balance_node) =
856 .name = "ip6-load-balance",
857 .vector_size = sizeof (u32),
858 .sibling_of = "ip6-lookup",
859 .format_trace = format_ip6_lookup_trace,
865 /* Adjacency taken. */
870 /* Packet data, possibly *after* rewrite. */
871 u8 packet_data[128 - 1 * sizeof (u32)];
873 ip6_forward_next_trace_t;
875 #ifndef CLIB_MARCH_VARIANT
877 format_ip6_forward_next_trace (u8 * s, va_list * args)
879 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
880 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
881 ip6_forward_next_trace_t *t = va_arg (*args, ip6_forward_next_trace_t *);
882 u32 indent = format_get_indent (s);
884 s = format (s, "%U%U",
885 format_white_space, indent,
886 format_ip6_header, t->packet_data, sizeof (t->packet_data));
892 format_ip6_lookup_trace (u8 * s, va_list * args)
894 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
895 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
896 ip6_forward_next_trace_t *t = va_arg (*args, ip6_forward_next_trace_t *);
897 u32 indent = format_get_indent (s);
899 s = format (s, "fib %d dpo-idx %d flow hash: 0x%08x",
900 t->fib_index, t->adj_index, t->flow_hash);
901 s = format (s, "\n%U%U",
902 format_white_space, indent,
903 format_ip6_header, t->packet_data, sizeof (t->packet_data));
909 format_ip6_rewrite_trace (u8 * s, va_list * args)
911 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
912 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
913 ip6_forward_next_trace_t *t = va_arg (*args, ip6_forward_next_trace_t *);
914 u32 indent = format_get_indent (s);
916 s = format (s, "tx_sw_if_index %d adj-idx %d : %U flow hash: 0x%08x",
917 t->fib_index, t->adj_index, format_ip_adjacency,
918 t->adj_index, FORMAT_IP_ADJACENCY_NONE, t->flow_hash);
919 s = format (s, "\n%U%U",
920 format_white_space, indent,
921 format_ip_adjacency_packet_data,
922 t->packet_data, sizeof (t->packet_data));
926 /* Common trace function for all ip6-forward next nodes. */
927 #ifndef CLIB_MARCH_VARIANT
929 ip6_forward_next_trace (vlib_main_t * vm,
930 vlib_node_runtime_t * node,
931 vlib_frame_t * frame, vlib_rx_or_tx_t which_adj_index)
934 ip6_main_t *im = &ip6_main;
936 n_left = frame->n_vectors;
937 from = vlib_frame_vector_args (frame);
942 vlib_buffer_t *b0, *b1;
943 ip6_forward_next_trace_t *t0, *t1;
945 /* Prefetch next iteration. */
946 vlib_prefetch_buffer_with_index (vm, from[2], LOAD);
947 vlib_prefetch_buffer_with_index (vm, from[3], LOAD);
952 b0 = vlib_get_buffer (vm, bi0);
953 b1 = vlib_get_buffer (vm, bi1);
955 if (b0->flags & VLIB_BUFFER_IS_TRACED)
957 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
958 t0->adj_index = vnet_buffer (b0)->ip.adj_index[which_adj_index];
959 t0->flow_hash = vnet_buffer (b0)->ip.flow_hash;
961 (vnet_buffer (b0)->sw_if_index[VLIB_TX] !=
962 (u32) ~ 0) ? vnet_buffer (b0)->sw_if_index[VLIB_TX] :
963 vec_elt (im->fib_index_by_sw_if_index,
964 vnet_buffer (b0)->sw_if_index[VLIB_RX]);
966 clib_memcpy_fast (t0->packet_data,
967 vlib_buffer_get_current (b0),
968 sizeof (t0->packet_data));
970 if (b1->flags & VLIB_BUFFER_IS_TRACED)
972 t1 = vlib_add_trace (vm, node, b1, sizeof (t1[0]));
973 t1->adj_index = vnet_buffer (b1)->ip.adj_index[which_adj_index];
974 t1->flow_hash = vnet_buffer (b1)->ip.flow_hash;
976 (vnet_buffer (b1)->sw_if_index[VLIB_TX] !=
977 (u32) ~ 0) ? vnet_buffer (b1)->sw_if_index[VLIB_TX] :
978 vec_elt (im->fib_index_by_sw_if_index,
979 vnet_buffer (b1)->sw_if_index[VLIB_RX]);
981 clib_memcpy_fast (t1->packet_data,
982 vlib_buffer_get_current (b1),
983 sizeof (t1->packet_data));
993 ip6_forward_next_trace_t *t0;
997 b0 = vlib_get_buffer (vm, bi0);
999 if (b0->flags & VLIB_BUFFER_IS_TRACED)
1001 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
1002 t0->adj_index = vnet_buffer (b0)->ip.adj_index[which_adj_index];
1003 t0->flow_hash = vnet_buffer (b0)->ip.flow_hash;
1005 (vnet_buffer (b0)->sw_if_index[VLIB_TX] !=
1006 (u32) ~ 0) ? vnet_buffer (b0)->sw_if_index[VLIB_TX] :
1007 vec_elt (im->fib_index_by_sw_if_index,
1008 vnet_buffer (b0)->sw_if_index[VLIB_RX]);
1010 clib_memcpy_fast (t0->packet_data,
1011 vlib_buffer_get_current (b0),
1012 sizeof (t0->packet_data));
1019 /* Compute TCP/UDP/ICMP6 checksum in software. */
1021 ip6_tcp_udp_icmp_compute_checksum (vlib_main_t * vm, vlib_buffer_t * p0,
1022 ip6_header_t * ip0, int *bogus_lengthp)
1025 u16 payload_length, payload_length_host_byte_order;
1027 u32 headers_size = sizeof (ip0[0]);
1028 u8 *data_this_buffer;
1029 u8 next_hdr = ip0->protocol;
1031 ASSERT (bogus_lengthp);
1034 payload_length_host_byte_order = clib_net_to_host_u16 (ip0->payload_length);
1035 data_this_buffer = (u8 *) (ip0 + 1);
1036 payload_length = ip0->payload_length;
1038 /* some icmp packets may come with a "router alert" hop-by-hop extension header (e.g., mldv2 packets)
1039 * or UDP-Ping packets */
1040 if (PREDICT_FALSE (next_hdr == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
1043 ip6_hop_by_hop_ext_t *ext_hdr =
1044 (ip6_hop_by_hop_ext_t *) data_this_buffer;
1046 /* validate really icmp6 next */
1047 ASSERT ((ext_hdr->next_hdr == IP_PROTOCOL_ICMP6)
1048 || (ext_hdr->next_hdr == IP_PROTOCOL_UDP));
1050 skip_bytes = 8 * (1 + ext_hdr->n_data_u64s);
1051 data_this_buffer = (void *) ((u8 *) data_this_buffer + skip_bytes);
1053 payload_length_host_byte_order -= skip_bytes;
1054 headers_size += skip_bytes;
1056 /* pseudo-header adjustments:
1057 * exclude ext header bytes from payload length
1058 * use payload IP proto rather than ext header IP proto
1060 payload_length = clib_host_to_net_u16 (payload_length_host_byte_order);
1061 next_hdr = ext_hdr->next_hdr;
1064 /* Initialize checksum with ip pseudo-header. */
1065 sum0 = payload_length + clib_host_to_net_u16 (next_hdr);
1067 for (i = 0; i < ARRAY_LEN (ip0->src_address.as_uword); i++)
1069 sum0 = ip_csum_with_carry
1070 (sum0, clib_mem_unaligned (&ip0->src_address.as_uword[i], uword));
1071 sum0 = ip_csum_with_carry
1072 (sum0, clib_mem_unaligned (&ip0->dst_address.as_uword[i], uword));
1076 return ip_calculate_l4_checksum (vm, p0, sum0,
1077 payload_length_host_byte_order,
1078 (u8 *) ip0, headers_size, NULL);
1080 return ip_calculate_l4_checksum (vm, 0, sum0,
1081 payload_length_host_byte_order, NULL, 0,
1086 ip6_tcp_udp_icmp_validate_checksum (vlib_main_t * vm, vlib_buffer_t * p0)
1088 ip6_header_t *ip0 = vlib_buffer_get_current (p0);
1093 /* some icmp packets may come with a "router alert" hop-by-hop extension header (e.g., mldv2 packets) */
1094 ASSERT (ip0->protocol == IP_PROTOCOL_TCP
1095 || ip0->protocol == IP_PROTOCOL_ICMP6
1096 || ip0->protocol == IP_PROTOCOL_UDP
1097 || ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS);
1099 udp0 = (void *) (ip0 + 1);
1100 if (ip0->protocol == IP_PROTOCOL_UDP && udp0->checksum == 0)
1102 p0->flags |= (VNET_BUFFER_F_L4_CHECKSUM_COMPUTED
1103 | VNET_BUFFER_F_L4_CHECKSUM_CORRECT);
1107 sum16 = ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip0, &bogus_length);
1109 p0->flags |= (VNET_BUFFER_F_L4_CHECKSUM_COMPUTED
1110 | ((sum16 == 0) << VNET_BUFFER_F_LOG2_L4_CHECKSUM_CORRECT));
1117 * @brief returns number of links on which src is reachable.
1120 ip6_urpf_loose_check (ip6_main_t * im, vlib_buffer_t * b, ip6_header_t * i)
1122 const load_balance_t *lb0;
1126 fib_index = vec_elt (im->fib_index_by_sw_if_index,
1127 vnet_buffer (b)->sw_if_index[VLIB_RX]);
1129 (vnet_buffer (b)->sw_if_index[VLIB_TX] == (u32) ~ 0) ?
1130 fib_index : vnet_buffer (b)->sw_if_index[VLIB_TX];
1132 lbi = ip6_fib_table_fwding_lookup (fib_index, &i->src_address);
1133 lb0 = load_balance_get (lbi);
1135 return (fib_urpf_check_size (lb0->lb_urpf));
1139 ip6_next_proto_is_tcp_udp (vlib_buffer_t * p0, ip6_header_t * ip0,
1143 proto0 = ip6_locate_header (p0, ip0, IP_PROTOCOL_UDP, udp_offset0);
1144 if (proto0 != IP_PROTOCOL_UDP)
1146 proto0 = ip6_locate_header (p0, ip0, IP_PROTOCOL_TCP, udp_offset0);
1147 proto0 = (proto0 == IP_PROTOCOL_TCP) ? proto0 : 0;
1153 VNET_FEATURE_ARC_INIT (ip6_local) =
1155 .arc_name = "ip6-local",
1156 .start_nodes = VNET_FEATURES ("ip6-local"),
1160 static_always_inline u8
1161 ip6_tcp_udp_icmp_bad_length (vlib_main_t * vm, vlib_buffer_t * p0)
1164 u16 payload_length_host_byte_order;
1165 u32 n_this_buffer, n_bytes_left;
1166 ip6_header_t *ip0 = vlib_buffer_get_current (p0);
1167 u32 headers_size = sizeof (ip0[0]);
1168 u8 *data_this_buffer;
1171 data_this_buffer = (u8 *) (ip0 + 1);
1173 ip6_hop_by_hop_ext_t *ext_hdr = (ip6_hop_by_hop_ext_t *) data_this_buffer;
1175 /* validate really icmp6 next */
1177 if (!(ext_hdr->next_hdr == IP_PROTOCOL_ICMP6)
1178 || (ext_hdr->next_hdr == IP_PROTOCOL_UDP))
1182 payload_length_host_byte_order = clib_net_to_host_u16 (ip0->payload_length);
1183 n_bytes_left = n_this_buffer = payload_length_host_byte_order;
1186 u32 n_ip_bytes_this_buffer =
1187 p0->current_length - (((u8 *) ip0 - p0->data) - p0->current_data);
1188 if (n_this_buffer + headers_size > n_ip_bytes_this_buffer)
1190 n_this_buffer = p0->current_length > headers_size ?
1191 n_ip_bytes_this_buffer - headers_size : 0;
1194 n_bytes_left -= n_this_buffer;
1195 n_bytes_left -= p0->total_length_not_including_first_buffer;
1197 if (n_bytes_left == 0)
1205 ip6_local_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
1206 vlib_frame_t * frame, int head_of_feature_arc)
1208 ip6_main_t *im = &ip6_main;
1209 ip_lookup_main_t *lm = &im->lookup_main;
1210 u32 *from, n_left_from;
1211 vlib_node_runtime_t *error_node =
1212 vlib_node_get_runtime (vm, ip6_input_node.index);
1213 u8 arc_index = vnet_feat_arc_ip6_local.feature_arc_index;
1214 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
1215 u16 nexts[VLIB_FRAME_SIZE], *next;
1217 from = vlib_frame_vector_args (frame);
1218 n_left_from = frame->n_vectors;
1220 if (node->flags & VLIB_NODE_FLAG_TRACE)
1221 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
1223 vlib_get_buffers (vm, from, bufs, n_left_from);
1227 while (n_left_from > 2)
1229 /* Prefetch next iteration. */
1230 if (n_left_from >= 6)
1232 vlib_prefetch_buffer_header (b[4], STORE);
1233 vlib_prefetch_buffer_header (b[5], STORE);
1234 vlib_prefetch_buffer_data (b[2], LOAD);
1235 vlib_prefetch_buffer_data (b[3], LOAD);
1239 error[0] = IP6_ERROR_UNKNOWN_PROTOCOL;
1240 error[1] = IP6_ERROR_UNKNOWN_PROTOCOL;
1242 ip6_header_t *ip[2];
1243 ip[0] = vlib_buffer_get_current (b[0]);
1244 ip[1] = vlib_buffer_get_current (b[1]);
1246 if (head_of_feature_arc)
1248 vnet_buffer (b[0])->l3_hdr_offset = b[0]->current_data;
1249 vnet_buffer (b[1])->l3_hdr_offset = b[1]->current_data;
1252 type[0] = lm->builtin_protocol_by_ip_protocol[ip[0]->protocol];
1253 type[1] = lm->builtin_protocol_by_ip_protocol[ip[1]->protocol];
1256 flags[0] = b[0]->flags;
1257 flags[1] = b[1]->flags;
1259 u32 good_l4_csum[2];
1261 flags[0] & (VNET_BUFFER_F_L4_CHECKSUM_CORRECT |
1262 VNET_BUFFER_F_OFFLOAD_TCP_CKSUM |
1263 VNET_BUFFER_F_OFFLOAD_UDP_CKSUM);
1265 flags[1] & (VNET_BUFFER_F_L4_CHECKSUM_CORRECT |
1266 VNET_BUFFER_F_OFFLOAD_TCP_CKSUM |
1267 VNET_BUFFER_F_OFFLOAD_UDP_CKSUM);
1269 u32 udp_offset[2] = { };
1272 ip6_next_proto_is_tcp_udp (b[0], ip[0], &udp_offset[0]);
1274 ip6_next_proto_is_tcp_udp (b[1], ip[1], &udp_offset[1]);
1275 i16 len_diff[2] = { 0 };
1276 if (PREDICT_TRUE (is_tcp_udp[0]))
1279 (udp_header_t *) ((u8 *) ip[0] + udp_offset[0]);
1280 good_l4_csum[0] |= type[0] == IP_BUILTIN_PROTOCOL_UDP
1281 && udp->checksum == 0;
1282 /* optimistically verify UDP length. */
1283 u16 ip_len, udp_len;
1284 ip_len = clib_net_to_host_u16 (ip[0]->payload_length);
1285 udp_len = clib_net_to_host_u16 (udp->length);
1286 len_diff[0] = ip_len - udp_len;
1288 if (PREDICT_TRUE (is_tcp_udp[1]))
1291 (udp_header_t *) ((u8 *) ip[1] + udp_offset[1]);
1292 good_l4_csum[1] |= type[1] == IP_BUILTIN_PROTOCOL_UDP
1293 && udp->checksum == 0;
1294 /* optimistically verify UDP length. */
1295 u16 ip_len, udp_len;
1296 ip_len = clib_net_to_host_u16 (ip[1]->payload_length);
1297 udp_len = clib_net_to_host_u16 (udp->length);
1298 len_diff[1] = ip_len - udp_len;
1301 good_l4_csum[0] |= type[0] == IP_BUILTIN_PROTOCOL_UNKNOWN;
1302 good_l4_csum[1] |= type[1] == IP_BUILTIN_PROTOCOL_UNKNOWN;
1304 len_diff[0] = type[0] == IP_BUILTIN_PROTOCOL_UDP ? len_diff[0] : 0;
1305 len_diff[1] = type[1] == IP_BUILTIN_PROTOCOL_UDP ? len_diff[1] : 0;
1308 need_csum[0] = type[0] != IP_BUILTIN_PROTOCOL_UNKNOWN
1310 && !(flags[0] & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED);
1311 need_csum[1] = type[1] != IP_BUILTIN_PROTOCOL_UNKNOWN
1313 && !(flags[1] & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED);
1314 if (PREDICT_FALSE (need_csum[0]))
1316 flags[0] = ip6_tcp_udp_icmp_validate_checksum (vm, b[0]);
1317 good_l4_csum[0] = flags[0] & VNET_BUFFER_F_L4_CHECKSUM_CORRECT;
1318 error[0] = IP6_ERROR_UNKNOWN_PROTOCOL;
1322 if (ip6_tcp_udp_icmp_bad_length (vm, b[0]))
1323 error[0] = IP6_ERROR_BAD_LENGTH;
1325 if (PREDICT_FALSE (need_csum[1]))
1327 flags[1] = ip6_tcp_udp_icmp_validate_checksum (vm, b[1]);
1328 good_l4_csum[1] = flags[1] & VNET_BUFFER_F_L4_CHECKSUM_CORRECT;
1329 error[1] = IP6_ERROR_UNKNOWN_PROTOCOL;
1333 if (ip6_tcp_udp_icmp_bad_length (vm, b[1]))
1334 error[1] = IP6_ERROR_BAD_LENGTH;
1338 error[0] = len_diff[0] < 0 ? IP6_ERROR_UDP_LENGTH : error[0];
1340 error[1] = len_diff[1] < 0 ? IP6_ERROR_UDP_LENGTH : error[1];
1342 STATIC_ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_UDP ==
1343 IP6_ERROR_UDP_CHECKSUM,
1344 "Wrong IP6 errors constants");
1345 STATIC_ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_ICMP ==
1346 IP6_ERROR_ICMP_CHECKSUM,
1347 "Wrong IP6 errors constants");
1350 !good_l4_csum[0] ? IP6_ERROR_UDP_CHECKSUM + type[0] : error[0];
1352 !good_l4_csum[1] ? IP6_ERROR_UDP_CHECKSUM + type[1] : error[1];
1354 /* Drop packets from unroutable hosts. */
1355 /* If this is a neighbor solicitation (ICMP), skip source RPF check */
1357 unroutable[0] = error[0] == IP6_ERROR_UNKNOWN_PROTOCOL
1358 && type[0] != IP_BUILTIN_PROTOCOL_ICMP
1359 && !ip6_address_is_link_local_unicast (&ip[0]->src_address);
1360 unroutable[1] = error[1] == IP6_ERROR_UNKNOWN_PROTOCOL
1361 && type[1] != IP_BUILTIN_PROTOCOL_ICMP
1362 && !ip6_address_is_link_local_unicast (&ip[1]->src_address);
1363 if (PREDICT_FALSE (unroutable[0]))
1366 !ip6_urpf_loose_check (im, b[0],
1367 ip[0]) ? IP6_ERROR_SRC_LOOKUP_MISS
1370 if (PREDICT_FALSE (unroutable[1]))
1373 !ip6_urpf_loose_check (im, b[1],
1374 ip[1]) ? IP6_ERROR_SRC_LOOKUP_MISS
1378 vnet_buffer (b[0])->ip.fib_index =
1379 vnet_buffer (b[0])->sw_if_index[VLIB_TX] != ~0 ?
1380 vnet_buffer (b[0])->sw_if_index[VLIB_TX] :
1381 vnet_buffer (b[0])->ip.fib_index;
1382 vnet_buffer (b[1])->ip.fib_index =
1383 vnet_buffer (b[1])->sw_if_index[VLIB_TX] != ~0 ?
1384 vnet_buffer (b[1])->sw_if_index[VLIB_TX] :
1385 vnet_buffer (b[1])->ip.fib_index;
1386 } /* head_of_feature_arc */
1388 next[0] = lm->local_next_by_ip_protocol[ip[0]->protocol];
1390 error[0] != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next[0];
1391 next[1] = lm->local_next_by_ip_protocol[ip[1]->protocol];
1393 error[1] != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next[1];
1395 b[0]->error = error_node->errors[0];
1396 b[1]->error = error_node->errors[1];
1398 if (head_of_feature_arc)
1401 ip6_unknown[0] = error[0] == (u8) IP6_ERROR_UNKNOWN_PROTOCOL;
1402 ip6_unknown[1] = error[1] == (u8) IP6_ERROR_UNKNOWN_PROTOCOL;
1403 if (PREDICT_TRUE (ip6_unknown[0]))
1405 u32 next32 = next[0];
1406 vnet_feature_arc_start (arc_index,
1407 vnet_buffer (b[0])->sw_if_index
1408 [VLIB_RX], &next32, b[0]);
1411 if (PREDICT_TRUE (ip6_unknown[1]))
1413 u32 next32 = next[1];
1414 vnet_feature_arc_start (arc_index,
1415 vnet_buffer (b[1])->sw_if_index
1416 [VLIB_RX], &next32, b[1]);
1430 error = IP6_ERROR_UNKNOWN_PROTOCOL;
1433 ip = vlib_buffer_get_current (b[0]);
1435 if (head_of_feature_arc)
1437 vnet_buffer (b[0])->l3_hdr_offset = b[0]->current_data;
1438 u8 type = lm->builtin_protocol_by_ip_protocol[ip->protocol];
1440 u32 flags = b[0]->flags;
1442 flags & (VNET_BUFFER_F_L4_CHECKSUM_CORRECT |
1443 VNET_BUFFER_F_OFFLOAD_TCP_CKSUM |
1444 VNET_BUFFER_F_OFFLOAD_UDP_CKSUM);
1448 u8 is_tcp_udp = ip6_next_proto_is_tcp_udp (b[0], ip, &udp_offset);
1449 if (PREDICT_TRUE (is_tcp_udp))
1451 udp_header_t *udp = (udp_header_t *) ((u8 *) ip + udp_offset);
1452 /* Don't verify UDP checksum for packets with explicit zero checksum. */
1453 good_l4_csum |= type == IP_BUILTIN_PROTOCOL_UDP
1454 && udp->checksum == 0;
1455 /* optimistically verify UDP length. */
1456 u16 ip_len, udp_len;
1457 ip_len = clib_net_to_host_u16 (ip->payload_length);
1458 udp_len = clib_net_to_host_u16 (udp->length);
1459 len_diff = ip_len - udp_len;
1462 good_l4_csum |= type == IP_BUILTIN_PROTOCOL_UNKNOWN;
1463 len_diff = type == IP_BUILTIN_PROTOCOL_UDP ? len_diff : 0;
1465 u8 need_csum = type != IP_BUILTIN_PROTOCOL_UNKNOWN && !good_l4_csum
1466 && !(flags & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED);
1467 if (PREDICT_FALSE (need_csum))
1469 flags = ip6_tcp_udp_icmp_validate_checksum (vm, b[0]);
1470 good_l4_csum = flags & VNET_BUFFER_F_L4_CHECKSUM_CORRECT;
1471 error = IP6_ERROR_UNKNOWN_PROTOCOL;
1475 if (ip6_tcp_udp_icmp_bad_length (vm, b[0]))
1476 error = IP6_ERROR_BAD_LENGTH;
1481 error = len_diff < 0 ? IP6_ERROR_UDP_LENGTH : error;
1483 STATIC_ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_UDP ==
1484 IP6_ERROR_UDP_CHECKSUM,
1485 "Wrong IP6 errors constants");
1486 STATIC_ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_ICMP ==
1487 IP6_ERROR_ICMP_CHECKSUM,
1488 "Wrong IP6 errors constants");
1490 error = !good_l4_csum ? IP6_ERROR_UDP_CHECKSUM + type : error;
1492 /* Drop packets from unroutable hosts. */
1493 /* If this is a neighbor solicitation (ICMP), skip source RPF check */
1494 u8 unroutable = error == IP6_ERROR_UNKNOWN_PROTOCOL
1495 && type != IP_BUILTIN_PROTOCOL_ICMP
1496 && !ip6_address_is_link_local_unicast (&ip->src_address);
1497 if (PREDICT_FALSE (unroutable))
1500 !ip6_urpf_loose_check (im, b[0],
1501 ip) ? IP6_ERROR_SRC_LOOKUP_MISS :
1505 vnet_buffer (b[0])->ip.fib_index =
1506 vnet_buffer (b[0])->sw_if_index[VLIB_TX] != ~0 ?
1507 vnet_buffer (b[0])->sw_if_index[VLIB_TX] :
1508 vnet_buffer (b[0])->ip.fib_index;
1509 } /* head_of_feature_arc */
1511 next[0] = lm->local_next_by_ip_protocol[ip->protocol];
1513 error != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next[0];
1515 b[0]->error = error_node->errors[0];
1517 if (head_of_feature_arc)
1519 if (PREDICT_TRUE (error == (u8) IP6_ERROR_UNKNOWN_PROTOCOL))
1521 u32 next32 = next[0];
1522 vnet_feature_arc_start (arc_index,
1523 vnet_buffer (b[0])->sw_if_index
1524 [VLIB_RX], &next32, b[0]);
1535 vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors);
1536 return frame->n_vectors;
1539 VLIB_NODE_FN (ip6_local_node) (vlib_main_t * vm, vlib_node_runtime_t * node,
1540 vlib_frame_t * frame)
1542 return ip6_local_inline (vm, node, frame, 1 /* head of feature arc */ );
1546 VLIB_REGISTER_NODE (ip6_local_node) =
1548 .name = "ip6-local",
1549 .vector_size = sizeof (u32),
1550 .format_trace = format_ip6_forward_next_trace,
1551 .n_next_nodes = IP_LOCAL_N_NEXT,
1554 [IP_LOCAL_NEXT_DROP] = "ip6-drop",
1555 [IP_LOCAL_NEXT_PUNT] = "ip6-punt",
1556 [IP_LOCAL_NEXT_UDP_LOOKUP] = "ip6-udp-lookup",
1557 [IP_LOCAL_NEXT_ICMP] = "ip6-icmp-input",
1558 [IP_LOCAL_NEXT_REASSEMBLY] = "ip6-full-reassembly",
1563 VLIB_NODE_FN (ip6_local_end_of_arc_node) (vlib_main_t * vm,
1564 vlib_node_runtime_t * node,
1565 vlib_frame_t * frame)
1567 return ip6_local_inline (vm, node, frame, 0 /* head of feature arc */ );
1571 VLIB_REGISTER_NODE (ip6_local_end_of_arc_node) = {
1572 .name = "ip6-local-end-of-arc",
1573 .vector_size = sizeof (u32),
1575 .format_trace = format_ip6_forward_next_trace,
1576 .sibling_of = "ip6-local",
1579 VNET_FEATURE_INIT (ip6_local_end_of_arc, static) = {
1580 .arc_name = "ip6-local",
1581 .node_name = "ip6-local-end-of-arc",
1582 .runs_before = 0, /* not before any other features */
1586 #ifdef CLIB_MARCH_VARIANT
1587 extern vlib_node_registration_t ip6_local_node;
1590 ip6_register_protocol (u32 protocol, u32 node_index)
1592 vlib_main_t *vm = vlib_get_main ();
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] =
1598 vlib_node_add_next (vm, ip6_local_node.index, node_index);
1602 ip6_unregister_protocol (u32 protocol)
1604 ip6_main_t *im = &ip6_main;
1605 ip_lookup_main_t *lm = &im->lookup_main;
1607 ASSERT (protocol < ARRAY_LEN (lm->local_next_by_ip_protocol));
1608 lm->local_next_by_ip_protocol[protocol] = IP_LOCAL_NEXT_PUNT;
1614 IP6_REWRITE_NEXT_DROP,
1615 IP6_REWRITE_NEXT_ICMP_ERROR,
1616 IP6_REWRITE_NEXT_FRAGMENT,
1617 IP6_REWRITE_N_NEXT /* Last */
1618 } ip6_rewrite_next_t;
1621 * This bits of an IPv6 address to mask to construct a multicast
1624 #define IP6_MCAST_ADDR_MASK 0xffffffff
1627 ip6_mtu_check (vlib_buffer_t * b, u16 packet_bytes,
1628 u16 adj_packet_bytes, bool is_locally_generated,
1629 u32 * next, u8 is_midchain, u32 * error)
1631 if (adj_packet_bytes >= 1280 && packet_bytes > adj_packet_bytes)
1633 if (is_locally_generated)
1635 /* IP fragmentation */
1636 ip_frag_set_vnet_buffer (b, adj_packet_bytes,
1638 IP_FRAG_NEXT_IP_REWRITE_MIDCHAIN :
1639 IP_FRAG_NEXT_IP_REWRITE), 0);
1640 *next = IP6_REWRITE_NEXT_FRAGMENT;
1641 *error = IP6_ERROR_MTU_EXCEEDED;
1645 *error = IP6_ERROR_MTU_EXCEEDED;
1646 icmp6_error_set_vnet_buffer (b, ICMP6_packet_too_big, 0,
1648 *next = IP6_REWRITE_NEXT_ICMP_ERROR;
1654 ip6_rewrite_inline_with_gso (vlib_main_t * vm,
1655 vlib_node_runtime_t * node,
1656 vlib_frame_t * frame,
1657 int do_counters, int is_midchain, int is_mcast)
1659 ip_lookup_main_t *lm = &ip6_main.lookup_main;
1660 u32 *from = vlib_frame_vector_args (frame);
1661 u32 n_left_from, n_left_to_next, *to_next, next_index;
1662 vlib_node_runtime_t *error_node =
1663 vlib_node_get_runtime (vm, ip6_input_node.index);
1665 n_left_from = frame->n_vectors;
1666 next_index = node->cached_next_index;
1667 u32 thread_index = vm->thread_index;
1669 while (n_left_from > 0)
1671 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1673 while (n_left_from >= 4 && n_left_to_next >= 2)
1675 const ip_adjacency_t *adj0, *adj1;
1676 vlib_buffer_t *p0, *p1;
1677 ip6_header_t *ip0, *ip1;
1678 u32 pi0, rw_len0, next0, error0, adj_index0;
1679 u32 pi1, rw_len1, next1, error1, adj_index1;
1680 u32 tx_sw_if_index0, tx_sw_if_index1;
1681 bool is_locally_originated0, is_locally_originated1;
1683 /* Prefetch next iteration. */
1685 vlib_buffer_t *p2, *p3;
1687 p2 = vlib_get_buffer (vm, from[2]);
1688 p3 = vlib_get_buffer (vm, from[3]);
1690 vlib_prefetch_buffer_header (p2, LOAD);
1691 vlib_prefetch_buffer_header (p3, LOAD);
1693 CLIB_PREFETCH (p2->pre_data, 32, STORE);
1694 CLIB_PREFETCH (p3->pre_data, 32, STORE);
1696 CLIB_PREFETCH (p2->data, sizeof (ip0[0]), STORE);
1697 CLIB_PREFETCH (p3->data, sizeof (ip0[0]), STORE);
1700 pi0 = to_next[0] = from[0];
1701 pi1 = to_next[1] = from[1];
1706 n_left_to_next -= 2;
1708 p0 = vlib_get_buffer (vm, pi0);
1709 p1 = vlib_get_buffer (vm, pi1);
1711 adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
1712 adj_index1 = vnet_buffer (p1)->ip.adj_index[VLIB_TX];
1714 ip0 = vlib_buffer_get_current (p0);
1715 ip1 = vlib_buffer_get_current (p1);
1717 error0 = error1 = IP6_ERROR_NONE;
1718 next0 = next1 = IP6_REWRITE_NEXT_DROP;
1720 is_locally_originated0 =
1721 p0->flags & VNET_BUFFER_F_LOCALLY_ORIGINATED;
1722 if (PREDICT_TRUE (!is_locally_originated0))
1724 i32 hop_limit0 = ip0->hop_limit;
1726 /* Input node should have reject packets with hop limit 0. */
1727 ASSERT (ip0->hop_limit > 0);
1731 ip0->hop_limit = hop_limit0;
1734 * If the hop count drops below 1 when forwarding, generate
1737 if (PREDICT_FALSE (hop_limit0 <= 0))
1739 error0 = IP6_ERROR_TIME_EXPIRED;
1740 next0 = IP6_REWRITE_NEXT_ICMP_ERROR;
1741 vnet_buffer (p0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
1742 icmp6_error_set_vnet_buffer (p0, ICMP6_time_exceeded,
1743 ICMP6_time_exceeded_ttl_exceeded_in_transit,
1748 is_locally_originated1 =
1749 p1->flags & VNET_BUFFER_F_LOCALLY_ORIGINATED;
1750 if (PREDICT_TRUE (!is_locally_originated1))
1752 i32 hop_limit1 = ip1->hop_limit;
1754 /* Input node should have reject packets with hop limit 0. */
1755 ASSERT (ip1->hop_limit > 0);
1759 ip1->hop_limit = hop_limit1;
1762 * If the hop count drops below 1 when forwarding, generate
1765 if (PREDICT_FALSE (hop_limit1 <= 0))
1767 error1 = IP6_ERROR_TIME_EXPIRED;
1768 next1 = IP6_REWRITE_NEXT_ICMP_ERROR;
1769 vnet_buffer (p1)->sw_if_index[VLIB_TX] = (u32) ~ 0;
1770 icmp6_error_set_vnet_buffer (p1, ICMP6_time_exceeded,
1771 ICMP6_time_exceeded_ttl_exceeded_in_transit,
1776 adj0 = adj_get (adj_index0);
1777 adj1 = adj_get (adj_index1);
1779 rw_len0 = adj0[0].rewrite_header.data_bytes;
1780 rw_len1 = adj1[0].rewrite_header.data_bytes;
1781 vnet_buffer (p0)->ip.save_rewrite_length = rw_len0;
1782 vnet_buffer (p1)->ip.save_rewrite_length = rw_len1;
1786 vlib_increment_combined_counter
1787 (&adjacency_counters,
1788 thread_index, adj_index0, 1,
1789 vlib_buffer_length_in_chain (vm, p0) + rw_len0);
1790 vlib_increment_combined_counter
1791 (&adjacency_counters,
1792 thread_index, adj_index1, 1,
1793 vlib_buffer_length_in_chain (vm, p1) + rw_len1);
1796 /* Check MTU of outgoing interface. */
1798 clib_net_to_host_u16 (ip0->payload_length) +
1799 sizeof (ip6_header_t);
1801 clib_net_to_host_u16 (ip1->payload_length) +
1802 sizeof (ip6_header_t);
1803 if (p0->flags & VNET_BUFFER_F_GSO)
1804 ip0_len = gso_mtu_sz (p0);
1805 if (p1->flags & VNET_BUFFER_F_GSO)
1806 ip1_len = gso_mtu_sz (p1);
1810 ip6_mtu_check (p0, ip0_len,
1811 adj0[0].rewrite_header.max_l3_packet_bytes,
1812 is_locally_originated0, &next0, is_midchain,
1814 ip6_mtu_check (p1, ip1_len,
1815 adj1[0].rewrite_header.max_l3_packet_bytes,
1816 is_locally_originated1, &next1, is_midchain,
1819 /* Don't adjust the buffer for hop count issue; icmp-error node
1820 * wants to see the IP header */
1821 if (PREDICT_TRUE (error0 == IP6_ERROR_NONE))
1823 p0->current_data -= rw_len0;
1824 p0->current_length += rw_len0;
1826 tx_sw_if_index0 = adj0[0].rewrite_header.sw_if_index;
1827 vnet_buffer (p0)->sw_if_index[VLIB_TX] = tx_sw_if_index0;
1828 next0 = adj0[0].rewrite_header.next_index;
1831 (adj0[0].rewrite_header.flags & VNET_REWRITE_HAS_FEATURES))
1832 vnet_feature_arc_start (lm->output_feature_arc_index,
1833 tx_sw_if_index0, &next0, p0);
1837 p0->error = error_node->errors[error0];
1839 if (PREDICT_TRUE (error1 == IP6_ERROR_NONE))
1841 p1->current_data -= rw_len1;
1842 p1->current_length += rw_len1;
1844 tx_sw_if_index1 = adj1[0].rewrite_header.sw_if_index;
1845 vnet_buffer (p1)->sw_if_index[VLIB_TX] = tx_sw_if_index1;
1846 next1 = adj1[0].rewrite_header.next_index;
1849 (adj1[0].rewrite_header.flags & VNET_REWRITE_HAS_FEATURES))
1850 vnet_feature_arc_start (lm->output_feature_arc_index,
1851 tx_sw_if_index1, &next1, p1);
1855 p1->error = error_node->errors[error1];
1860 /* before we paint on the next header, update the L4
1861 * checksums if required, since there's no offload on a tunnel */
1862 vnet_calc_checksums_inline (vm, p0, 0 /* is_ip4 */ ,
1865 vnet_calc_checksums_inline (vm, p1, 0 /* is_ip4 */ ,
1870 /* Guess we are only writing on simple Ethernet header. */
1871 vnet_rewrite_two_headers (adj0[0], adj1[0],
1872 ip0, ip1, sizeof (ethernet_header_t));
1876 if (adj0->sub_type.midchain.fixup_func)
1877 adj0->sub_type.midchain.fixup_func
1878 (vm, adj0, p0, adj0->sub_type.midchain.fixup_data);
1879 if (adj1->sub_type.midchain.fixup_func)
1880 adj1->sub_type.midchain.fixup_func
1881 (vm, adj1, p1, adj1->sub_type.midchain.fixup_data);
1886 * copy bytes from the IP address into the MAC rewrite
1888 vnet_ip_mcast_fixup_header (IP6_MCAST_ADDR_MASK,
1890 rewrite_header.dst_mcast_offset,
1891 &ip0->dst_address.as_u32[3],
1893 vnet_ip_mcast_fixup_header (IP6_MCAST_ADDR_MASK,
1895 rewrite_header.dst_mcast_offset,
1896 &ip1->dst_address.as_u32[3],
1900 vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
1901 to_next, n_left_to_next,
1902 pi0, pi1, next0, next1);
1905 while (n_left_from > 0 && n_left_to_next > 0)
1907 ip_adjacency_t *adj0;
1911 u32 adj_index0, next0, error0;
1912 u32 tx_sw_if_index0;
1913 bool is_locally_originated0;
1915 pi0 = to_next[0] = from[0];
1917 p0 = vlib_get_buffer (vm, pi0);
1919 adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
1921 adj0 = adj_get (adj_index0);
1923 ip0 = vlib_buffer_get_current (p0);
1925 error0 = IP6_ERROR_NONE;
1926 next0 = IP6_REWRITE_NEXT_DROP;
1928 /* Check hop limit */
1929 is_locally_originated0 =
1930 p0->flags & VNET_BUFFER_F_LOCALLY_ORIGINATED;
1931 if (PREDICT_TRUE (!is_locally_originated0))
1933 i32 hop_limit0 = ip0->hop_limit;
1935 ASSERT (ip0->hop_limit > 0);
1939 ip0->hop_limit = hop_limit0;
1941 if (PREDICT_FALSE (hop_limit0 <= 0))
1944 * If the hop count drops below 1 when forwarding, generate
1947 error0 = IP6_ERROR_TIME_EXPIRED;
1948 next0 = IP6_REWRITE_NEXT_ICMP_ERROR;
1949 vnet_buffer (p0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
1950 icmp6_error_set_vnet_buffer (p0, ICMP6_time_exceeded,
1951 ICMP6_time_exceeded_ttl_exceeded_in_transit,
1958 vnet_calc_checksums_inline (vm, p0, 0 /* is_ip4 */ ,
1963 /* Guess we are only writing on simple Ethernet header. */
1964 vnet_rewrite_one_header (adj0[0], ip0, sizeof (ethernet_header_t));
1966 /* Update packet buffer attributes/set output interface. */
1967 rw_len0 = adj0[0].rewrite_header.data_bytes;
1968 vnet_buffer (p0)->ip.save_rewrite_length = rw_len0;
1972 vlib_increment_combined_counter
1973 (&adjacency_counters,
1974 thread_index, adj_index0, 1,
1975 vlib_buffer_length_in_chain (vm, p0) + rw_len0);
1978 /* Check MTU of outgoing interface. */
1980 clib_net_to_host_u16 (ip0->payload_length) +
1981 sizeof (ip6_header_t);
1982 if (p0->flags & VNET_BUFFER_F_GSO)
1983 ip0_len = gso_mtu_sz (p0);
1985 ip6_mtu_check (p0, ip0_len,
1986 adj0[0].rewrite_header.max_l3_packet_bytes,
1987 is_locally_originated0, &next0, is_midchain,
1990 /* Don't adjust the buffer for hop count issue; icmp-error node
1991 * wants to see the IP header */
1992 if (PREDICT_TRUE (error0 == IP6_ERROR_NONE))
1994 p0->current_data -= rw_len0;
1995 p0->current_length += rw_len0;
1997 tx_sw_if_index0 = adj0[0].rewrite_header.sw_if_index;
1999 vnet_buffer (p0)->sw_if_index[VLIB_TX] = tx_sw_if_index0;
2000 next0 = adj0[0].rewrite_header.next_index;
2003 (adj0[0].rewrite_header.flags & VNET_REWRITE_HAS_FEATURES))
2004 vnet_feature_arc_start (lm->output_feature_arc_index,
2005 tx_sw_if_index0, &next0, p0);
2009 p0->error = error_node->errors[error0];
2014 if (adj0->sub_type.midchain.fixup_func)
2015 adj0->sub_type.midchain.fixup_func
2016 (vm, adj0, p0, adj0->sub_type.midchain.fixup_data);
2020 vnet_ip_mcast_fixup_header (IP6_MCAST_ADDR_MASK,
2022 rewrite_header.dst_mcast_offset,
2023 &ip0->dst_address.as_u32[3],
2030 n_left_to_next -= 1;
2032 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
2033 to_next, n_left_to_next,
2037 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2040 /* Need to do trace after rewrites to pick up new packet data. */
2041 if (node->flags & VLIB_NODE_FLAG_TRACE)
2042 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
2044 return frame->n_vectors;
2048 ip6_rewrite_inline (vlib_main_t * vm,
2049 vlib_node_runtime_t * node,
2050 vlib_frame_t * frame,
2051 int do_counters, int is_midchain, int is_mcast)
2053 return ip6_rewrite_inline_with_gso (vm, node, frame, do_counters,
2054 is_midchain, is_mcast);
2057 VLIB_NODE_FN (ip6_rewrite_node) (vlib_main_t * vm,
2058 vlib_node_runtime_t * node,
2059 vlib_frame_t * frame)
2061 if (adj_are_counters_enabled ())
2062 return ip6_rewrite_inline (vm, node, frame, 1, 0, 0);
2064 return ip6_rewrite_inline (vm, node, frame, 0, 0, 0);
2067 VLIB_NODE_FN (ip6_rewrite_bcast_node) (vlib_main_t * vm,
2068 vlib_node_runtime_t * node,
2069 vlib_frame_t * frame)
2071 if (adj_are_counters_enabled ())
2072 return ip6_rewrite_inline (vm, node, frame, 1, 0, 0);
2074 return ip6_rewrite_inline (vm, node, frame, 0, 0, 0);
2077 VLIB_NODE_FN (ip6_rewrite_mcast_node) (vlib_main_t * vm,
2078 vlib_node_runtime_t * node,
2079 vlib_frame_t * frame)
2081 if (adj_are_counters_enabled ())
2082 return ip6_rewrite_inline (vm, node, frame, 1, 0, 1);
2084 return ip6_rewrite_inline (vm, node, frame, 0, 0, 1);
2087 VLIB_NODE_FN (ip6_midchain_node) (vlib_main_t * vm,
2088 vlib_node_runtime_t * node,
2089 vlib_frame_t * frame)
2091 if (adj_are_counters_enabled ())
2092 return ip6_rewrite_inline (vm, node, frame, 1, 1, 0);
2094 return ip6_rewrite_inline (vm, node, frame, 0, 1, 0);
2097 VLIB_NODE_FN (ip6_mcast_midchain_node) (vlib_main_t * vm,
2098 vlib_node_runtime_t * node,
2099 vlib_frame_t * frame)
2101 if (adj_are_counters_enabled ())
2102 return ip6_rewrite_inline (vm, node, frame, 1, 1, 1);
2104 return ip6_rewrite_inline (vm, node, frame, 0, 1, 1);
2108 VLIB_REGISTER_NODE (ip6_midchain_node) =
2110 .name = "ip6-midchain",
2111 .vector_size = sizeof (u32),
2112 .format_trace = format_ip6_forward_next_trace,
2113 .sibling_of = "ip6-rewrite",
2116 VLIB_REGISTER_NODE (ip6_rewrite_node) =
2118 .name = "ip6-rewrite",
2119 .vector_size = sizeof (u32),
2120 .format_trace = format_ip6_rewrite_trace,
2121 .n_next_nodes = IP6_REWRITE_N_NEXT,
2124 [IP6_REWRITE_NEXT_DROP] = "ip6-drop",
2125 [IP6_REWRITE_NEXT_ICMP_ERROR] = "ip6-icmp-error",
2126 [IP6_REWRITE_NEXT_FRAGMENT] = "ip6-frag",
2130 VLIB_REGISTER_NODE (ip6_rewrite_bcast_node) = {
2131 .name = "ip6-rewrite-bcast",
2132 .vector_size = sizeof (u32),
2134 .format_trace = format_ip6_rewrite_trace,
2135 .sibling_of = "ip6-rewrite",
2138 VLIB_REGISTER_NODE (ip6_rewrite_mcast_node) =
2140 .name = "ip6-rewrite-mcast",
2141 .vector_size = sizeof (u32),
2142 .format_trace = format_ip6_rewrite_trace,
2143 .sibling_of = "ip6-rewrite",
2147 VLIB_REGISTER_NODE (ip6_mcast_midchain_node) =
2149 .name = "ip6-mcast-midchain",
2150 .vector_size = sizeof (u32),
2151 .format_trace = format_ip6_rewrite_trace,
2152 .sibling_of = "ip6-rewrite",
2158 * Hop-by-Hop handling
2160 #ifndef CLIB_MARCH_VARIANT
2161 ip6_hop_by_hop_main_t ip6_hop_by_hop_main;
2162 #endif /* CLIB_MARCH_VARIANT */
2164 #define foreach_ip6_hop_by_hop_error \
2165 _(PROCESSED, "pkts with ip6 hop-by-hop options") \
2166 _(FORMAT, "incorrectly formatted hop-by-hop options") \
2167 _(UNKNOWN_OPTION, "unknown ip6 hop-by-hop options")
2172 #define _(sym,str) IP6_HOP_BY_HOP_ERROR_##sym,
2173 foreach_ip6_hop_by_hop_error
2175 IP6_HOP_BY_HOP_N_ERROR,
2176 } ip6_hop_by_hop_error_t;
2180 * Primary h-b-h handler trace support
2181 * We work pretty hard on the problem for obvious reasons
2187 u8 option_data[256];
2188 } ip6_hop_by_hop_trace_t;
2190 extern vlib_node_registration_t ip6_hop_by_hop_node;
2192 static char *ip6_hop_by_hop_error_strings[] = {
2193 #define _(sym,string) string,
2194 foreach_ip6_hop_by_hop_error
2198 #ifndef CLIB_MARCH_VARIANT
2200 format_ip6_hop_by_hop_ext_hdr (u8 * s, va_list * args)
2202 ip6_hop_by_hop_header_t *hbh0 = va_arg (*args, ip6_hop_by_hop_header_t *);
2203 int total_len = va_arg (*args, int);
2204 ip6_hop_by_hop_option_t *opt0, *limit0;
2205 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2208 s = format (s, "IP6_HOP_BY_HOP: next protocol %d len %d total %d",
2209 hbh0->protocol, (hbh0->length + 1) << 3, total_len);
2211 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2212 limit0 = (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 + total_len);
2214 while (opt0 < limit0)
2219 case 0: /* Pad, just stop */
2220 opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0 + 1);
2224 if (hm->trace[type0])
2226 s = (*hm->trace[type0]) (s, opt0);
2231 format (s, "\n unrecognized option %d length %d", type0,
2235 (ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length +
2236 sizeof (ip6_hop_by_hop_option_t));
2245 format_ip6_hop_by_hop_trace (u8 * s, va_list * args)
2247 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
2248 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
2249 ip6_hop_by_hop_trace_t *t = va_arg (*args, ip6_hop_by_hop_trace_t *);
2250 ip6_hop_by_hop_header_t *hbh0;
2251 ip6_hop_by_hop_option_t *opt0, *limit0;
2252 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2256 hbh0 = (ip6_hop_by_hop_header_t *) t->option_data;
2258 s = format (s, "IP6_HOP_BY_HOP: next index %d len %d traced %d",
2259 t->next_index, (hbh0->length + 1) << 3, t->trace_len);
2261 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2262 limit0 = (ip6_hop_by_hop_option_t *) ((u8 *) hbh0) + t->trace_len;
2264 while (opt0 < limit0)
2269 case 0: /* Pad, just stop */
2270 opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0) + 1;
2274 if (hm->trace[type0])
2276 s = (*hm->trace[type0]) (s, opt0);
2281 format (s, "\n unrecognized option %d length %d", type0,
2285 (ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length +
2286 sizeof (ip6_hop_by_hop_option_t));
2294 ip6_scan_hbh_options (vlib_buffer_t * b0,
2296 ip6_hop_by_hop_header_t * hbh0,
2297 ip6_hop_by_hop_option_t * opt0,
2298 ip6_hop_by_hop_option_t * limit0, u32 * next0)
2300 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2304 while (opt0 < limit0)
2310 opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0) + 1;
2315 if (hm->options[type0])
2317 if ((*hm->options[type0]) (b0, ip0, opt0) < 0)
2319 error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2325 /* Unrecognized mandatory option, check the two high order bits */
2326 switch (opt0->type & HBH_OPTION_TYPE_HIGH_ORDER_BITS)
2328 case HBH_OPTION_TYPE_SKIP_UNKNOWN:
2330 case HBH_OPTION_TYPE_DISCARD_UNKNOWN:
2331 error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2332 *next0 = IP_LOOKUP_NEXT_DROP;
2334 case HBH_OPTION_TYPE_DISCARD_UNKNOWN_ICMP:
2335 error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2336 *next0 = IP_LOOKUP_NEXT_ICMP_ERROR;
2337 icmp6_error_set_vnet_buffer (b0, ICMP6_parameter_problem,
2338 ICMP6_parameter_problem_unrecognized_option,
2339 (u8 *) opt0 - (u8 *) ip0);
2341 case HBH_OPTION_TYPE_DISCARD_UNKNOWN_ICMP_NOT_MCAST:
2342 error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2343 if (!ip6_address_is_multicast (&ip0->dst_address))
2345 *next0 = IP_LOOKUP_NEXT_ICMP_ERROR;
2346 icmp6_error_set_vnet_buffer (b0,
2347 ICMP6_parameter_problem,
2348 ICMP6_parameter_problem_unrecognized_option,
2349 (u8 *) opt0 - (u8 *) ip0);
2353 *next0 = IP_LOOKUP_NEXT_DROP;
2361 (ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length +
2362 sizeof (ip6_hop_by_hop_option_t));
2368 * Process the Hop-by-Hop Options header
2370 VLIB_NODE_FN (ip6_hop_by_hop_node) (vlib_main_t * vm,
2371 vlib_node_runtime_t * node,
2372 vlib_frame_t * frame)
2374 vlib_node_runtime_t *error_node =
2375 vlib_node_get_runtime (vm, ip6_hop_by_hop_node.index);
2376 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2377 u32 n_left_from, *from, *to_next;
2378 ip_lookup_next_t next_index;
2380 from = vlib_frame_vector_args (frame);
2381 n_left_from = frame->n_vectors;
2382 next_index = node->cached_next_index;
2384 while (n_left_from > 0)
2388 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
2390 while (n_left_from >= 4 && n_left_to_next >= 2)
2393 vlib_buffer_t *b0, *b1;
2395 ip6_header_t *ip0, *ip1;
2396 ip6_hop_by_hop_header_t *hbh0, *hbh1;
2397 ip6_hop_by_hop_option_t *opt0, *limit0, *opt1, *limit1;
2398 u8 error0 = 0, error1 = 0;
2400 /* Prefetch next iteration. */
2402 vlib_buffer_t *p2, *p3;
2404 p2 = vlib_get_buffer (vm, from[2]);
2405 p3 = vlib_get_buffer (vm, from[3]);
2407 vlib_prefetch_buffer_header (p2, LOAD);
2408 vlib_prefetch_buffer_header (p3, LOAD);
2410 CLIB_PREFETCH (p2->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
2411 CLIB_PREFETCH (p3->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
2414 /* Speculatively enqueue b0, b1 to the current next frame */
2415 to_next[0] = bi0 = from[0];
2416 to_next[1] = bi1 = from[1];
2420 n_left_to_next -= 2;
2422 b0 = vlib_get_buffer (vm, bi0);
2423 b1 = vlib_get_buffer (vm, bi1);
2425 /* Default use the next_index from the adjacency. A HBH option rarely redirects to a different node */
2426 u32 adj_index0 = vnet_buffer (b0)->ip.adj_index[VLIB_TX];
2427 ip_adjacency_t *adj0 = adj_get (adj_index0);
2428 u32 adj_index1 = vnet_buffer (b1)->ip.adj_index[VLIB_TX];
2429 ip_adjacency_t *adj1 = adj_get (adj_index1);
2431 /* Default use the next_index from the adjacency. A HBH option rarely redirects to a different node */
2432 next0 = adj0->lookup_next_index;
2433 next1 = adj1->lookup_next_index;
2435 ip0 = vlib_buffer_get_current (b0);
2436 ip1 = vlib_buffer_get_current (b1);
2437 hbh0 = (ip6_hop_by_hop_header_t *) (ip0 + 1);
2438 hbh1 = (ip6_hop_by_hop_header_t *) (ip1 + 1);
2439 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2440 opt1 = (ip6_hop_by_hop_option_t *) (hbh1 + 1);
2442 (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 +
2443 ((hbh0->length + 1) << 3));
2445 (ip6_hop_by_hop_option_t *) ((u8 *) hbh1 +
2446 ((hbh1->length + 1) << 3));
2449 * Basic validity checks
2451 if ((hbh0->length + 1) << 3 >
2452 clib_net_to_host_u16 (ip0->payload_length))
2454 error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2455 next0 = IP_LOOKUP_NEXT_DROP;
2458 /* Scan the set of h-b-h options, process ones that we understand */
2459 error0 = ip6_scan_hbh_options (b0, ip0, hbh0, opt0, limit0, &next0);
2461 if ((hbh1->length + 1) << 3 >
2462 clib_net_to_host_u16 (ip1->payload_length))
2464 error1 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2465 next1 = IP_LOOKUP_NEXT_DROP;
2468 /* Scan the set of h-b-h options, process ones that we understand */
2469 error1 = ip6_scan_hbh_options (b1, ip1, hbh1, opt1, limit1, &next1);
2472 /* Has the classifier flagged this buffer for special treatment? */
2475 && (vnet_buffer (b0)->l2_classify.opaque_index & OI_DECAP)))
2476 next0 = hm->next_override;
2478 /* Has the classifier flagged this buffer for special treatment? */
2481 && (vnet_buffer (b1)->l2_classify.opaque_index & OI_DECAP)))
2482 next1 = hm->next_override;
2484 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)))
2486 if (b0->flags & VLIB_BUFFER_IS_TRACED)
2488 ip6_hop_by_hop_trace_t *t =
2489 vlib_add_trace (vm, node, b0, sizeof (*t));
2490 u32 trace_len = (hbh0->length + 1) << 3;
2491 t->next_index = next0;
2492 /* Capture the h-b-h option verbatim */
2495 ARRAY_LEN (t->option_data) ? trace_len :
2496 ARRAY_LEN (t->option_data);
2497 t->trace_len = trace_len;
2498 clib_memcpy_fast (t->option_data, hbh0, trace_len);
2500 if (b1->flags & VLIB_BUFFER_IS_TRACED)
2502 ip6_hop_by_hop_trace_t *t =
2503 vlib_add_trace (vm, node, b1, sizeof (*t));
2504 u32 trace_len = (hbh1->length + 1) << 3;
2505 t->next_index = next1;
2506 /* Capture the h-b-h option verbatim */
2509 ARRAY_LEN (t->option_data) ? trace_len :
2510 ARRAY_LEN (t->option_data);
2511 t->trace_len = trace_len;
2512 clib_memcpy_fast (t->option_data, hbh1, trace_len);
2517 b0->error = error_node->errors[error0];
2518 b1->error = error_node->errors[error1];
2520 /* verify speculative enqueue, maybe switch current next frame */
2521 vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
2522 n_left_to_next, bi0, bi1, next0,
2526 while (n_left_from > 0 && n_left_to_next > 0)
2532 ip6_hop_by_hop_header_t *hbh0;
2533 ip6_hop_by_hop_option_t *opt0, *limit0;
2536 /* Speculatively enqueue b0 to the current next frame */
2542 n_left_to_next -= 1;
2544 b0 = vlib_get_buffer (vm, bi0);
2546 * Default use the next_index from the adjacency.
2547 * A HBH option rarely redirects to a different node
2549 u32 adj_index0 = vnet_buffer (b0)->ip.adj_index[VLIB_TX];
2550 ip_adjacency_t *adj0 = adj_get (adj_index0);
2551 next0 = adj0->lookup_next_index;
2553 ip0 = vlib_buffer_get_current (b0);
2554 hbh0 = (ip6_hop_by_hop_header_t *) (ip0 + 1);
2555 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2557 (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 +
2558 ((hbh0->length + 1) << 3));
2561 * Basic validity checks
2563 if ((hbh0->length + 1) << 3 >
2564 clib_net_to_host_u16 (ip0->payload_length))
2566 error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2567 next0 = IP_LOOKUP_NEXT_DROP;
2571 /* Scan the set of h-b-h options, process ones that we understand */
2572 error0 = ip6_scan_hbh_options (b0, ip0, hbh0, opt0, limit0, &next0);
2575 /* Has the classifier flagged this buffer for special treatment? */
2578 && (vnet_buffer (b0)->l2_classify.opaque_index & OI_DECAP)))
2579 next0 = hm->next_override;
2581 if (PREDICT_FALSE (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);
2596 b0->error = error_node->errors[error0];
2598 /* verify speculative enqueue, maybe switch current next frame */
2599 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
2600 n_left_to_next, bi0, next0);
2602 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2604 return frame->n_vectors;
2608 VLIB_REGISTER_NODE (ip6_hop_by_hop_node) =
2610 .name = "ip6-hop-by-hop",
2611 .sibling_of = "ip6-lookup",
2612 .vector_size = sizeof (u32),
2613 .format_trace = format_ip6_hop_by_hop_trace,
2614 .type = VLIB_NODE_TYPE_INTERNAL,
2615 .n_errors = ARRAY_LEN (ip6_hop_by_hop_error_strings),
2616 .error_strings = ip6_hop_by_hop_error_strings,
2621 static clib_error_t *
2622 ip6_hop_by_hop_init (vlib_main_t * vm)
2624 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2625 clib_memset (hm->options, 0, sizeof (hm->options));
2626 clib_memset (hm->trace, 0, sizeof (hm->trace));
2627 hm->next_override = IP6_LOOKUP_NEXT_POP_HOP_BY_HOP;
2631 VLIB_INIT_FUNCTION (ip6_hop_by_hop_init);
2633 #ifndef CLIB_MARCH_VARIANT
2635 ip6_hbh_set_next_override (uword next)
2637 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2639 hm->next_override = next;
2643 ip6_hbh_register_option (u8 option,
2644 int options (vlib_buffer_t * b, ip6_header_t * ip,
2645 ip6_hop_by_hop_option_t * opt),
2646 u8 * trace (u8 * s, ip6_hop_by_hop_option_t * opt))
2648 ip6_main_t *im = &ip6_main;
2649 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2651 ASSERT ((u32) option < ARRAY_LEN (hm->options));
2653 /* Already registered */
2654 if (hm->options[option])
2657 hm->options[option] = options;
2658 hm->trace[option] = trace;
2660 /* Set global variable */
2661 im->hbh_enabled = 1;
2667 ip6_hbh_unregister_option (u8 option)
2669 ip6_main_t *im = &ip6_main;
2670 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2672 ASSERT ((u32) option < ARRAY_LEN (hm->options));
2674 /* Not registered */
2675 if (!hm->options[option])
2678 hm->options[option] = NULL;
2679 hm->trace[option] = NULL;
2681 /* Disable global knob if this was the last option configured */
2684 for (i = 0; i < 256; i++)
2686 if (hm->options[option])
2693 im->hbh_enabled = 0;
2698 /* Global IP6 main. */
2699 ip6_main_t ip6_main;
2702 static clib_error_t *
2703 ip6_lookup_init (vlib_main_t * vm)
2705 ip6_main_t *im = &ip6_main;
2706 clib_error_t *error;
2709 if ((error = vlib_call_init_function (vm, vnet_feature_init)))
2712 for (i = 0; i < ARRAY_LEN (im->fib_masks); i++)
2719 for (j = 0; j < i0; j++)
2720 im->fib_masks[i].as_u32[j] = ~0;
2723 im->fib_masks[i].as_u32[i0] =
2724 clib_host_to_net_u32 (pow2_mask (i1) << (32 - i1));
2727 ip_lookup_init (&im->lookup_main, /* is_ip6 */ 1);
2729 if (im->lookup_table_nbuckets == 0)
2730 im->lookup_table_nbuckets = IP6_FIB_DEFAULT_HASH_NUM_BUCKETS;
2732 im->lookup_table_nbuckets = 1 << max_log2 (im->lookup_table_nbuckets);
2734 if (im->lookup_table_size == 0)
2735 im->lookup_table_size = IP6_FIB_DEFAULT_HASH_MEMORY_SIZE;
2737 clib_bihash_init_24_8 (&(im->ip6_table[IP6_FIB_TABLE_FWDING].ip6_hash),
2738 "ip6 FIB fwding table",
2739 im->lookup_table_nbuckets, im->lookup_table_size);
2740 clib_bihash_init_24_8 (&im->ip6_table[IP6_FIB_TABLE_NON_FWDING].ip6_hash,
2741 "ip6 FIB non-fwding table",
2742 im->lookup_table_nbuckets, im->lookup_table_size);
2743 clib_bihash_init_40_8 (&im->ip6_mtable.ip6_mhash,
2745 im->lookup_table_nbuckets, im->lookup_table_size);
2747 /* Create FIB with index 0 and table id of 0. */
2748 fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6, 0,
2749 FIB_SOURCE_DEFAULT_ROUTE);
2750 mfib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6, 0,
2751 MFIB_SOURCE_DEFAULT_ROUTE);
2755 pn = pg_get_node (ip6_lookup_node.index);
2756 pn->unformat_edit = unformat_pg_ip6_header;
2759 /* Unless explicitly configured, don't process HBH options */
2760 im->hbh_enabled = 0;
2765 VLIB_INIT_FUNCTION (ip6_lookup_init);
2767 #ifndef CLIB_MARCH_VARIANT
2769 vnet_set_ip6_flow_hash (u32 table_id, u32 flow_hash_config)
2773 fib_index = fib_table_find (FIB_PROTOCOL_IP6, table_id);
2775 if (~0 == fib_index)
2776 return VNET_API_ERROR_NO_SUCH_FIB;
2778 fib_table_set_flow_hash_config (fib_index, FIB_PROTOCOL_IP6,
2785 static clib_error_t *
2786 set_ip6_flow_hash_command_fn (vlib_main_t * vm,
2787 unformat_input_t * input,
2788 vlib_cli_command_t * cmd)
2792 u32 flow_hash_config = 0;
2795 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
2797 if (unformat (input, "table %d", &table_id))
2800 else if (unformat (input, #a)) { flow_hash_config |= v; matched=1;}
2801 foreach_flow_hash_bit
2808 return clib_error_return (0, "unknown input `%U'",
2809 format_unformat_error, input);
2811 rv = vnet_set_ip6_flow_hash (table_id, flow_hash_config);
2818 return clib_error_return (0, "no such FIB table %d", table_id);
2821 clib_warning ("BUG: illegal flow hash config 0x%x", flow_hash_config);
2829 * Configure the set of IPv6 fields used by the flow hash.
2833 * Example of how to set the flow hash on a given table:
2834 * @cliexcmd{set ip6 flow-hash table 8 dst sport dport proto}
2836 * Example of display the configured flow hash:
2837 * @cliexstart{show ip6 fib}
2838 * ipv6-VRF:0, fib_index 0, flow hash: src dst sport dport proto
2841 * [@0]: dpo-load-balance: [index:5 buckets:1 uRPF:5 to:[0:0]]
2842 * [0] [@0]: dpo-drop ip6
2845 * [@0]: dpo-load-balance: [index:10 buckets:1 uRPF:10 to:[0:0]]
2846 * [0] [@2]: dpo-receive
2849 * [@0]: dpo-load-balance: [index:8 buckets:1 uRPF:8 to:[0:0]]
2850 * [0] [@2]: dpo-receive
2853 * [@0]: dpo-load-balance: [index:7 buckets:1 uRPF:7 to:[0:0]]
2854 * [0] [@2]: dpo-receive
2857 * [@0]: dpo-load-balance: [index:9 buckets:1 uRPF:9 to:[0:0]]
2858 * [0] [@2]: dpo-receive
2859 * ff02::1:ff00:0/104
2861 * [@0]: dpo-load-balance: [index:6 buckets:1 uRPF:6 to:[0:0]]
2862 * [0] [@2]: dpo-receive
2863 * ipv6-VRF:8, fib_index 1, flow hash: dst sport dport proto
2866 * [@0]: dpo-load-balance: [index:21 buckets:1 uRPF:20 to:[0:0]]
2867 * [0] [@0]: dpo-drop ip6
2870 * [@0]: dpo-load-balance: [index:27 buckets:1 uRPF:26 to:[0:0]]
2871 * [0] [@4]: ipv6-glean: af_packet0
2874 * [@0]: dpo-load-balance: [index:28 buckets:1 uRPF:27 to:[0:0]]
2875 * [0] [@2]: dpo-receive: @::a:1:1:0:7 on af_packet0
2878 * [@0]: dpo-load-balance: [index:26 buckets:1 uRPF:25 to:[0:0]]
2879 * [0] [@2]: dpo-receive
2880 * fe80::fe:3eff:fe3e:9222/128
2882 * [@0]: dpo-load-balance: [index:29 buckets:1 uRPF:28 to:[0:0]]
2883 * [0] [@2]: dpo-receive: fe80::fe:3eff:fe3e:9222 on af_packet0
2886 * [@0]: dpo-load-balance: [index:24 buckets:1 uRPF:23 to:[0:0]]
2887 * [0] [@2]: dpo-receive
2890 * [@0]: dpo-load-balance: [index:23 buckets:1 uRPF:22 to:[0:0]]
2891 * [0] [@2]: dpo-receive
2894 * [@0]: dpo-load-balance: [index:25 buckets:1 uRPF:24 to:[0:0]]
2895 * [0] [@2]: dpo-receive
2896 * ff02::1:ff00:0/104
2898 * [@0]: dpo-load-balance: [index:22 buckets:1 uRPF:21 to:[0:0]]
2899 * [0] [@2]: dpo-receive
2904 VLIB_CLI_COMMAND (set_ip6_flow_hash_command, static) =
2906 .path = "set ip6 flow-hash",
2908 "set ip6 flow-hash table <table-id> [src] [dst] [sport] [dport] [proto] [reverse]",
2909 .function = set_ip6_flow_hash_command_fn,
2913 static clib_error_t *
2914 show_ip6_local_command_fn (vlib_main_t * vm,
2915 unformat_input_t * input, vlib_cli_command_t * cmd)
2917 ip6_main_t *im = &ip6_main;
2918 ip_lookup_main_t *lm = &im->lookup_main;
2921 vlib_cli_output (vm, "Protocols handled by ip6_local");
2922 for (i = 0; i < ARRAY_LEN (lm->local_next_by_ip_protocol); i++)
2924 if (lm->local_next_by_ip_protocol[i] != IP_LOCAL_NEXT_PUNT)
2927 u32 node_index = vlib_get_node (vm,
2928 ip6_local_node.index)->
2929 next_nodes[lm->local_next_by_ip_protocol[i]];
2930 vlib_cli_output (vm, "%d: %U", i, format_vlib_node_name, vm,
2940 * Display the set of protocols handled by the local IPv6 stack.
2943 * Example of how to display local protocol table:
2944 * @cliexstart{show ip6 local}
2945 * Protocols handled by ip6_local
2953 VLIB_CLI_COMMAND (show_ip6_local, static) =
2955 .path = "show ip6 local",
2956 .function = show_ip6_local_command_fn,
2957 .short_help = "show ip6 local",
2961 #ifndef CLIB_MARCH_VARIANT
2963 vnet_set_ip6_classify_intfc (vlib_main_t * vm, u32 sw_if_index,
2966 vnet_main_t *vnm = vnet_get_main ();
2967 vnet_interface_main_t *im = &vnm->interface_main;
2968 ip6_main_t *ipm = &ip6_main;
2969 ip_lookup_main_t *lm = &ipm->lookup_main;
2970 vnet_classify_main_t *cm = &vnet_classify_main;
2971 ip6_address_t *if_addr;
2973 if (pool_is_free_index (im->sw_interfaces, sw_if_index))
2974 return VNET_API_ERROR_NO_MATCHING_INTERFACE;
2976 if (table_index != ~0 && pool_is_free_index (cm->tables, table_index))
2977 return VNET_API_ERROR_NO_SUCH_ENTRY;
2979 vec_validate (lm->classify_table_index_by_sw_if_index, sw_if_index);
2980 lm->classify_table_index_by_sw_if_index[sw_if_index] = table_index;
2982 if_addr = ip6_interface_first_address (ipm, sw_if_index);
2984 if (NULL != if_addr)
2986 fib_prefix_t pfx = {
2988 .fp_proto = FIB_PROTOCOL_IP6,
2989 .fp_addr.ip6 = *if_addr,
2993 fib_index = fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4,
2997 if (table_index != (u32) ~ 0)
2999 dpo_id_t dpo = DPO_INVALID;
3004 classify_dpo_create (DPO_PROTO_IP6, table_index));
3006 fib_table_entry_special_dpo_add (fib_index,
3008 FIB_SOURCE_CLASSIFY,
3009 FIB_ENTRY_FLAG_NONE, &dpo);
3014 fib_table_entry_special_remove (fib_index,
3015 &pfx, FIB_SOURCE_CLASSIFY);
3023 static clib_error_t *
3024 set_ip6_classify_command_fn (vlib_main_t * vm,
3025 unformat_input_t * input,
3026 vlib_cli_command_t * cmd)
3028 u32 table_index = ~0;
3029 int table_index_set = 0;
3030 u32 sw_if_index = ~0;
3033 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
3035 if (unformat (input, "table-index %d", &table_index))
3036 table_index_set = 1;
3037 else if (unformat (input, "intfc %U", unformat_vnet_sw_interface,
3038 vnet_get_main (), &sw_if_index))
3044 if (table_index_set == 0)
3045 return clib_error_return (0, "classify table-index must be specified");
3047 if (sw_if_index == ~0)
3048 return clib_error_return (0, "interface / subif must be specified");
3050 rv = vnet_set_ip6_classify_intfc (vm, sw_if_index, table_index);
3057 case VNET_API_ERROR_NO_MATCHING_INTERFACE:
3058 return clib_error_return (0, "No such interface");
3060 case VNET_API_ERROR_NO_SUCH_ENTRY:
3061 return clib_error_return (0, "No such classifier table");
3067 * Assign a classification table to an interface. The classification
3068 * table is created using the '<em>classify table</em>' and '<em>classify session</em>'
3069 * commands. Once the table is create, use this command to filter packets
3073 * Example of how to assign a classification table to an interface:
3074 * @cliexcmd{set ip6 classify intfc GigabitEthernet2/0/0 table-index 1}
3077 VLIB_CLI_COMMAND (set_ip6_classify_command, static) =
3079 .path = "set ip6 classify",
3081 "set ip6 classify intfc <interface> table-index <classify-idx>",
3082 .function = set_ip6_classify_command_fn,
3086 static clib_error_t *
3087 ip6_config (vlib_main_t * vm, unformat_input_t * input)
3089 ip6_main_t *im = &ip6_main;
3094 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
3096 if (unformat (input, "hash-buckets %d", &tmp))
3098 else if (unformat (input, "heap-size %U",
3099 unformat_memory_size, &heapsize))
3102 return clib_error_return (0, "unknown input '%U'",
3103 format_unformat_error, input);
3106 im->lookup_table_nbuckets = nbuckets;
3107 im->lookup_table_size = heapsize;
3112 VLIB_EARLY_CONFIG_FUNCTION (ip6_config, "ip6");
3115 * fd.io coding-style-patch-verification: ON
3118 * eval: (c-set-style "gnu")