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_host_byte_order;
1027 u32 headers_size = sizeof (ip0[0]);
1028 u8 *data_this_buffer;
1030 ASSERT (bogus_lengthp);
1033 /* Initialize checksum with ip header. */
1034 sum0 = ip0->payload_length + clib_host_to_net_u16 (ip0->protocol);
1035 payload_length_host_byte_order = clib_net_to_host_u16 (ip0->payload_length);
1036 data_this_buffer = (u8 *) (ip0 + 1);
1038 for (i = 0; i < ARRAY_LEN (ip0->src_address.as_uword); i++)
1040 sum0 = ip_csum_with_carry
1041 (sum0, clib_mem_unaligned (&ip0->src_address.as_uword[i], uword));
1042 sum0 = ip_csum_with_carry
1043 (sum0, clib_mem_unaligned (&ip0->dst_address.as_uword[i], uword));
1046 /* some icmp packets may come with a "router alert" hop-by-hop extension header (e.g., mldv2 packets)
1047 * or UDP-Ping packets */
1048 if (PREDICT_FALSE (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
1051 ip6_hop_by_hop_ext_t *ext_hdr =
1052 (ip6_hop_by_hop_ext_t *) data_this_buffer;
1054 /* validate really icmp6 next */
1055 ASSERT ((ext_hdr->next_hdr == IP_PROTOCOL_ICMP6)
1056 || (ext_hdr->next_hdr == IP_PROTOCOL_UDP));
1058 skip_bytes = 8 * (1 + ext_hdr->n_data_u64s);
1059 data_this_buffer = (void *) ((u8 *) data_this_buffer + skip_bytes);
1061 payload_length_host_byte_order -= skip_bytes;
1062 headers_size += skip_bytes;
1066 return ip_calculate_l4_checksum (vm, p0, sum0,
1067 payload_length_host_byte_order,
1068 (u8 *) ip0, headers_size, NULL);
1070 return ip_calculate_l4_checksum (vm, 0, sum0,
1071 payload_length_host_byte_order, NULL, 0,
1076 ip6_tcp_udp_icmp_validate_checksum (vlib_main_t * vm, vlib_buffer_t * p0)
1078 ip6_header_t *ip0 = vlib_buffer_get_current (p0);
1083 /* some icmp packets may come with a "router alert" hop-by-hop extension header (e.g., mldv2 packets) */
1084 ASSERT (ip0->protocol == IP_PROTOCOL_TCP
1085 || ip0->protocol == IP_PROTOCOL_ICMP6
1086 || ip0->protocol == IP_PROTOCOL_UDP
1087 || ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS);
1089 udp0 = (void *) (ip0 + 1);
1090 if (ip0->protocol == IP_PROTOCOL_UDP && udp0->checksum == 0)
1092 p0->flags |= (VNET_BUFFER_F_L4_CHECKSUM_COMPUTED
1093 | VNET_BUFFER_F_L4_CHECKSUM_CORRECT);
1097 sum16 = ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip0, &bogus_length);
1099 p0->flags |= (VNET_BUFFER_F_L4_CHECKSUM_COMPUTED
1100 | ((sum16 == 0) << VNET_BUFFER_F_LOG2_L4_CHECKSUM_CORRECT));
1107 * @brief returns number of links on which src is reachable.
1110 ip6_urpf_loose_check (ip6_main_t * im, vlib_buffer_t * b, ip6_header_t * i)
1112 const load_balance_t *lb0;
1116 fib_index = vec_elt (im->fib_index_by_sw_if_index,
1117 vnet_buffer (b)->sw_if_index[VLIB_RX]);
1119 (vnet_buffer (b)->sw_if_index[VLIB_TX] == (u32) ~ 0) ?
1120 fib_index : vnet_buffer (b)->sw_if_index[VLIB_TX];
1122 lbi = ip6_fib_table_fwding_lookup (fib_index, &i->src_address);
1123 lb0 = load_balance_get (lbi);
1125 return (fib_urpf_check_size (lb0->lb_urpf));
1129 ip6_next_proto_is_tcp_udp (vlib_buffer_t * p0, ip6_header_t * ip0,
1133 proto0 = ip6_locate_header (p0, ip0, IP_PROTOCOL_UDP, udp_offset0);
1134 if (proto0 != IP_PROTOCOL_UDP)
1136 proto0 = ip6_locate_header (p0, ip0, IP_PROTOCOL_TCP, udp_offset0);
1137 proto0 = (proto0 == IP_PROTOCOL_TCP) ? proto0 : 0;
1143 VNET_FEATURE_ARC_INIT (ip6_local) =
1145 .arc_name = "ip6-local",
1146 .start_nodes = VNET_FEATURES ("ip6-local"),
1150 static_always_inline u8
1151 ip6_tcp_udp_icmp_bad_length (vlib_main_t * vm, vlib_buffer_t * p0)
1154 u16 payload_length_host_byte_order;
1155 u32 n_this_buffer, n_bytes_left;
1156 ip6_header_t *ip0 = vlib_buffer_get_current (p0);
1157 u32 headers_size = sizeof (ip0[0]);
1158 u8 *data_this_buffer;
1161 data_this_buffer = (u8 *) (ip0 + 1);
1163 ip6_hop_by_hop_ext_t *ext_hdr = (ip6_hop_by_hop_ext_t *) data_this_buffer;
1165 /* validate really icmp6 next */
1167 if (!(ext_hdr->next_hdr == IP_PROTOCOL_ICMP6)
1168 || (ext_hdr->next_hdr == IP_PROTOCOL_UDP))
1172 payload_length_host_byte_order = clib_net_to_host_u16 (ip0->payload_length);
1173 n_bytes_left = n_this_buffer = payload_length_host_byte_order;
1176 u32 n_ip_bytes_this_buffer =
1177 p0->current_length - (((u8 *) ip0 - p0->data) - p0->current_data);
1178 if (n_this_buffer + headers_size > n_ip_bytes_this_buffer)
1180 n_this_buffer = p0->current_length > headers_size ?
1181 n_ip_bytes_this_buffer - headers_size : 0;
1184 n_bytes_left -= n_this_buffer;
1185 n_bytes_left -= p0->total_length_not_including_first_buffer;
1187 if (n_bytes_left == 0)
1195 ip6_local_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
1196 vlib_frame_t * frame, int head_of_feature_arc)
1198 ip6_main_t *im = &ip6_main;
1199 ip_lookup_main_t *lm = &im->lookup_main;
1200 u32 *from, n_left_from;
1201 vlib_node_runtime_t *error_node =
1202 vlib_node_get_runtime (vm, ip6_input_node.index);
1203 u8 arc_index = vnet_feat_arc_ip6_local.feature_arc_index;
1204 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
1205 u16 nexts[VLIB_FRAME_SIZE], *next;
1207 from = vlib_frame_vector_args (frame);
1208 n_left_from = frame->n_vectors;
1210 if (node->flags & VLIB_NODE_FLAG_TRACE)
1211 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
1213 vlib_get_buffers (vm, from, bufs, n_left_from);
1217 while (n_left_from > 2)
1219 /* Prefetch next iteration. */
1220 if (n_left_from >= 6)
1222 vlib_prefetch_buffer_header (b[4], STORE);
1223 vlib_prefetch_buffer_header (b[5], STORE);
1224 vlib_prefetch_buffer_data (b[2], LOAD);
1225 vlib_prefetch_buffer_data (b[3], LOAD);
1229 error[0] = IP6_ERROR_UNKNOWN_PROTOCOL;
1230 error[1] = IP6_ERROR_UNKNOWN_PROTOCOL;
1232 ip6_header_t *ip[2];
1233 ip[0] = vlib_buffer_get_current (b[0]);
1234 ip[1] = vlib_buffer_get_current (b[1]);
1236 if (head_of_feature_arc)
1238 vnet_buffer (b[0])->l3_hdr_offset = b[0]->current_data;
1239 vnet_buffer (b[1])->l3_hdr_offset = b[1]->current_data;
1242 type[0] = lm->builtin_protocol_by_ip_protocol[ip[0]->protocol];
1243 type[1] = lm->builtin_protocol_by_ip_protocol[ip[1]->protocol];
1246 flags[0] = b[0]->flags;
1247 flags[1] = b[1]->flags;
1249 u32 good_l4_csum[2];
1251 flags[0] & (VNET_BUFFER_F_L4_CHECKSUM_CORRECT |
1252 VNET_BUFFER_F_OFFLOAD_TCP_CKSUM |
1253 VNET_BUFFER_F_OFFLOAD_UDP_CKSUM);
1255 flags[1] & (VNET_BUFFER_F_L4_CHECKSUM_CORRECT |
1256 VNET_BUFFER_F_OFFLOAD_TCP_CKSUM |
1257 VNET_BUFFER_F_OFFLOAD_UDP_CKSUM);
1259 u32 udp_offset[2] = { };
1262 ip6_next_proto_is_tcp_udp (b[0], ip[0], &udp_offset[0]);
1264 ip6_next_proto_is_tcp_udp (b[1], ip[1], &udp_offset[1]);
1265 i16 len_diff[2] = { 0 };
1266 if (PREDICT_TRUE (is_tcp_udp[0]))
1269 (udp_header_t *) ((u8 *) ip[0] + udp_offset[0]);
1270 good_l4_csum[0] |= type[0] == IP_BUILTIN_PROTOCOL_UDP
1271 && udp->checksum == 0;
1272 /* optimistically verify UDP length. */
1273 u16 ip_len, udp_len;
1274 ip_len = clib_net_to_host_u16 (ip[0]->payload_length);
1275 udp_len = clib_net_to_host_u16 (udp->length);
1276 len_diff[0] = ip_len - udp_len;
1278 if (PREDICT_TRUE (is_tcp_udp[1]))
1281 (udp_header_t *) ((u8 *) ip[1] + udp_offset[1]);
1282 good_l4_csum[1] |= type[1] == IP_BUILTIN_PROTOCOL_UDP
1283 && udp->checksum == 0;
1284 /* optimistically verify UDP length. */
1285 u16 ip_len, udp_len;
1286 ip_len = clib_net_to_host_u16 (ip[1]->payload_length);
1287 udp_len = clib_net_to_host_u16 (udp->length);
1288 len_diff[1] = ip_len - udp_len;
1291 good_l4_csum[0] |= type[0] == IP_BUILTIN_PROTOCOL_UNKNOWN;
1292 good_l4_csum[1] |= type[1] == IP_BUILTIN_PROTOCOL_UNKNOWN;
1294 len_diff[0] = type[0] == IP_BUILTIN_PROTOCOL_UDP ? len_diff[0] : 0;
1295 len_diff[1] = type[1] == IP_BUILTIN_PROTOCOL_UDP ? len_diff[1] : 0;
1298 need_csum[0] = type[0] != IP_BUILTIN_PROTOCOL_UNKNOWN
1300 && !(flags[0] & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED);
1301 need_csum[1] = type[1] != IP_BUILTIN_PROTOCOL_UNKNOWN
1303 && !(flags[1] & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED);
1304 if (PREDICT_FALSE (need_csum[0]))
1306 flags[0] = ip6_tcp_udp_icmp_validate_checksum (vm, b[0]);
1307 good_l4_csum[0] = flags[0] & VNET_BUFFER_F_L4_CHECKSUM_CORRECT;
1308 error[0] = IP6_ERROR_UNKNOWN_PROTOCOL;
1312 if (ip6_tcp_udp_icmp_bad_length (vm, b[0]))
1313 error[0] = IP6_ERROR_BAD_LENGTH;
1315 if (PREDICT_FALSE (need_csum[1]))
1317 flags[1] = ip6_tcp_udp_icmp_validate_checksum (vm, b[1]);
1318 good_l4_csum[1] = flags[1] & VNET_BUFFER_F_L4_CHECKSUM_CORRECT;
1319 error[1] = IP6_ERROR_UNKNOWN_PROTOCOL;
1323 if (ip6_tcp_udp_icmp_bad_length (vm, b[1]))
1324 error[1] = IP6_ERROR_BAD_LENGTH;
1328 error[0] = len_diff[0] < 0 ? IP6_ERROR_UDP_LENGTH : error[0];
1330 error[1] = len_diff[1] < 0 ? IP6_ERROR_UDP_LENGTH : error[1];
1332 STATIC_ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_UDP ==
1333 IP6_ERROR_UDP_CHECKSUM,
1334 "Wrong IP6 errors constants");
1335 STATIC_ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_ICMP ==
1336 IP6_ERROR_ICMP_CHECKSUM,
1337 "Wrong IP6 errors constants");
1340 !good_l4_csum[0] ? IP6_ERROR_UDP_CHECKSUM + type[0] : error[0];
1342 !good_l4_csum[1] ? IP6_ERROR_UDP_CHECKSUM + type[1] : error[1];
1344 /* Drop packets from unroutable hosts. */
1345 /* If this is a neighbor solicitation (ICMP), skip source RPF check */
1347 unroutable[0] = error[0] == IP6_ERROR_UNKNOWN_PROTOCOL
1348 && type[0] != IP_BUILTIN_PROTOCOL_ICMP
1349 && !ip6_address_is_link_local_unicast (&ip[0]->src_address);
1350 unroutable[1] = error[1] == IP6_ERROR_UNKNOWN_PROTOCOL
1351 && type[1] != IP_BUILTIN_PROTOCOL_ICMP
1352 && !ip6_address_is_link_local_unicast (&ip[1]->src_address);
1353 if (PREDICT_FALSE (unroutable[0]))
1356 !ip6_urpf_loose_check (im, b[0],
1357 ip[0]) ? IP6_ERROR_SRC_LOOKUP_MISS
1360 if (PREDICT_FALSE (unroutable[1]))
1363 !ip6_urpf_loose_check (im, b[1],
1364 ip[1]) ? IP6_ERROR_SRC_LOOKUP_MISS
1368 vnet_buffer (b[0])->ip.fib_index =
1369 vnet_buffer (b[0])->sw_if_index[VLIB_TX] != ~0 ?
1370 vnet_buffer (b[0])->sw_if_index[VLIB_TX] :
1371 vnet_buffer (b[0])->ip.fib_index;
1372 vnet_buffer (b[1])->ip.fib_index =
1373 vnet_buffer (b[1])->sw_if_index[VLIB_TX] != ~0 ?
1374 vnet_buffer (b[1])->sw_if_index[VLIB_TX] :
1375 vnet_buffer (b[1])->ip.fib_index;
1376 } /* head_of_feature_arc */
1378 next[0] = lm->local_next_by_ip_protocol[ip[0]->protocol];
1380 error[0] != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next[0];
1381 next[1] = lm->local_next_by_ip_protocol[ip[1]->protocol];
1383 error[1] != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next[1];
1385 b[0]->error = error_node->errors[0];
1386 b[1]->error = error_node->errors[1];
1388 if (head_of_feature_arc)
1391 ip6_unknown[0] = error[0] == (u8) IP6_ERROR_UNKNOWN_PROTOCOL;
1392 ip6_unknown[1] = error[1] == (u8) IP6_ERROR_UNKNOWN_PROTOCOL;
1393 if (PREDICT_TRUE (ip6_unknown[0]))
1395 u32 next32 = next[0];
1396 vnet_feature_arc_start (arc_index,
1397 vnet_buffer (b[0])->sw_if_index
1398 [VLIB_RX], &next32, b[0]);
1401 if (PREDICT_TRUE (ip6_unknown[1]))
1403 u32 next32 = next[1];
1404 vnet_feature_arc_start (arc_index,
1405 vnet_buffer (b[1])->sw_if_index
1406 [VLIB_RX], &next32, b[1]);
1420 error = IP6_ERROR_UNKNOWN_PROTOCOL;
1423 ip = vlib_buffer_get_current (b[0]);
1425 if (head_of_feature_arc)
1427 vnet_buffer (b[0])->l3_hdr_offset = b[0]->current_data;
1428 u8 type = lm->builtin_protocol_by_ip_protocol[ip->protocol];
1430 u32 flags = b[0]->flags;
1432 flags & (VNET_BUFFER_F_L4_CHECKSUM_CORRECT |
1433 VNET_BUFFER_F_OFFLOAD_TCP_CKSUM |
1434 VNET_BUFFER_F_OFFLOAD_UDP_CKSUM);
1438 u8 is_tcp_udp = ip6_next_proto_is_tcp_udp (b[0], ip, &udp_offset);
1439 if (PREDICT_TRUE (is_tcp_udp))
1441 udp_header_t *udp = (udp_header_t *) ((u8 *) ip + udp_offset);
1442 /* Don't verify UDP checksum for packets with explicit zero checksum. */
1443 good_l4_csum |= type == IP_BUILTIN_PROTOCOL_UDP
1444 && udp->checksum == 0;
1445 /* optimistically verify UDP length. */
1446 u16 ip_len, udp_len;
1447 ip_len = clib_net_to_host_u16 (ip->payload_length);
1448 udp_len = clib_net_to_host_u16 (udp->length);
1449 len_diff = ip_len - udp_len;
1452 good_l4_csum |= type == IP_BUILTIN_PROTOCOL_UNKNOWN;
1453 len_diff = type == IP_BUILTIN_PROTOCOL_UDP ? len_diff : 0;
1455 u8 need_csum = type != IP_BUILTIN_PROTOCOL_UNKNOWN && !good_l4_csum
1456 && !(flags & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED);
1457 if (PREDICT_FALSE (need_csum))
1459 flags = ip6_tcp_udp_icmp_validate_checksum (vm, b[0]);
1460 good_l4_csum = flags & VNET_BUFFER_F_L4_CHECKSUM_CORRECT;
1461 error = IP6_ERROR_UNKNOWN_PROTOCOL;
1465 if (ip6_tcp_udp_icmp_bad_length (vm, b[0]))
1466 error = IP6_ERROR_BAD_LENGTH;
1471 error = len_diff < 0 ? IP6_ERROR_UDP_LENGTH : error;
1473 STATIC_ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_UDP ==
1474 IP6_ERROR_UDP_CHECKSUM,
1475 "Wrong IP6 errors constants");
1476 STATIC_ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_ICMP ==
1477 IP6_ERROR_ICMP_CHECKSUM,
1478 "Wrong IP6 errors constants");
1480 error = !good_l4_csum ? IP6_ERROR_UDP_CHECKSUM + type : error;
1482 /* Drop packets from unroutable hosts. */
1483 /* If this is a neighbor solicitation (ICMP), skip source RPF check */
1484 u8 unroutable = error == IP6_ERROR_UNKNOWN_PROTOCOL
1485 && type != IP_BUILTIN_PROTOCOL_ICMP
1486 && !ip6_address_is_link_local_unicast (&ip->src_address);
1487 if (PREDICT_FALSE (unroutable))
1490 !ip6_urpf_loose_check (im, b[0],
1491 ip) ? IP6_ERROR_SRC_LOOKUP_MISS :
1495 vnet_buffer (b[0])->ip.fib_index =
1496 vnet_buffer (b[0])->sw_if_index[VLIB_TX] != ~0 ?
1497 vnet_buffer (b[0])->sw_if_index[VLIB_TX] :
1498 vnet_buffer (b[0])->ip.fib_index;
1499 } /* head_of_feature_arc */
1501 next[0] = lm->local_next_by_ip_protocol[ip->protocol];
1503 error != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next[0];
1505 b[0]->error = error_node->errors[0];
1507 if (head_of_feature_arc)
1509 if (PREDICT_TRUE (error == (u8) IP6_ERROR_UNKNOWN_PROTOCOL))
1511 u32 next32 = next[0];
1512 vnet_feature_arc_start (arc_index,
1513 vnet_buffer (b[0])->sw_if_index
1514 [VLIB_RX], &next32, b[0]);
1525 vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors);
1526 return frame->n_vectors;
1529 VLIB_NODE_FN (ip6_local_node) (vlib_main_t * vm, vlib_node_runtime_t * node,
1530 vlib_frame_t * frame)
1532 return ip6_local_inline (vm, node, frame, 1 /* head of feature arc */ );
1536 VLIB_REGISTER_NODE (ip6_local_node) =
1538 .name = "ip6-local",
1539 .vector_size = sizeof (u32),
1540 .format_trace = format_ip6_forward_next_trace,
1541 .n_next_nodes = IP_LOCAL_N_NEXT,
1544 [IP_LOCAL_NEXT_DROP] = "ip6-drop",
1545 [IP_LOCAL_NEXT_PUNT] = "ip6-punt",
1546 [IP_LOCAL_NEXT_UDP_LOOKUP] = "ip6-udp-lookup",
1547 [IP_LOCAL_NEXT_ICMP] = "ip6-icmp-input",
1548 [IP_LOCAL_NEXT_REASSEMBLY] = "ip6-full-reassembly",
1553 VLIB_NODE_FN (ip6_local_end_of_arc_node) (vlib_main_t * vm,
1554 vlib_node_runtime_t * node,
1555 vlib_frame_t * frame)
1557 return ip6_local_inline (vm, node, frame, 0 /* head of feature arc */ );
1561 VLIB_REGISTER_NODE (ip6_local_end_of_arc_node) = {
1562 .name = "ip6-local-end-of-arc",
1563 .vector_size = sizeof (u32),
1565 .format_trace = format_ip6_forward_next_trace,
1566 .sibling_of = "ip6-local",
1569 VNET_FEATURE_INIT (ip6_local_end_of_arc, static) = {
1570 .arc_name = "ip6-local",
1571 .node_name = "ip6-local-end-of-arc",
1572 .runs_before = 0, /* not before any other features */
1576 #ifdef CLIB_MARCH_VARIANT
1577 extern vlib_node_registration_t ip6_local_node;
1580 ip6_register_protocol (u32 protocol, u32 node_index)
1582 vlib_main_t *vm = vlib_get_main ();
1583 ip6_main_t *im = &ip6_main;
1584 ip_lookup_main_t *lm = &im->lookup_main;
1586 ASSERT (protocol < ARRAY_LEN (lm->local_next_by_ip_protocol));
1587 lm->local_next_by_ip_protocol[protocol] =
1588 vlib_node_add_next (vm, ip6_local_node.index, node_index);
1592 ip6_unregister_protocol (u32 protocol)
1594 ip6_main_t *im = &ip6_main;
1595 ip_lookup_main_t *lm = &im->lookup_main;
1597 ASSERT (protocol < ARRAY_LEN (lm->local_next_by_ip_protocol));
1598 lm->local_next_by_ip_protocol[protocol] = IP_LOCAL_NEXT_PUNT;
1604 IP6_REWRITE_NEXT_DROP,
1605 IP6_REWRITE_NEXT_ICMP_ERROR,
1606 IP6_REWRITE_NEXT_FRAGMENT,
1607 IP6_REWRITE_N_NEXT /* Last */
1608 } ip6_rewrite_next_t;
1611 * This bits of an IPv6 address to mask to construct a multicast
1614 #define IP6_MCAST_ADDR_MASK 0xffffffff
1617 ip6_mtu_check (vlib_buffer_t * b, u16 packet_bytes,
1618 u16 adj_packet_bytes, bool is_locally_generated,
1619 u32 * next, u8 is_midchain, u32 * error)
1621 if (adj_packet_bytes >= 1280 && packet_bytes > adj_packet_bytes)
1623 if (is_locally_generated)
1625 /* IP fragmentation */
1626 ip_frag_set_vnet_buffer (b, adj_packet_bytes,
1628 IP_FRAG_NEXT_IP_REWRITE_MIDCHAIN :
1629 IP_FRAG_NEXT_IP_REWRITE), 0);
1630 *next = IP6_REWRITE_NEXT_FRAGMENT;
1631 *error = IP6_ERROR_MTU_EXCEEDED;
1635 *error = IP6_ERROR_MTU_EXCEEDED;
1636 icmp6_error_set_vnet_buffer (b, ICMP6_packet_too_big, 0,
1638 *next = IP6_REWRITE_NEXT_ICMP_ERROR;
1644 ip6_rewrite_inline_with_gso (vlib_main_t * vm,
1645 vlib_node_runtime_t * node,
1646 vlib_frame_t * frame,
1647 int do_counters, int is_midchain, int is_mcast)
1649 ip_lookup_main_t *lm = &ip6_main.lookup_main;
1650 u32 *from = vlib_frame_vector_args (frame);
1651 u32 n_left_from, n_left_to_next, *to_next, next_index;
1652 vlib_node_runtime_t *error_node =
1653 vlib_node_get_runtime (vm, ip6_input_node.index);
1655 n_left_from = frame->n_vectors;
1656 next_index = node->cached_next_index;
1657 u32 thread_index = vm->thread_index;
1659 while (n_left_from > 0)
1661 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1663 while (n_left_from >= 4 && n_left_to_next >= 2)
1665 const ip_adjacency_t *adj0, *adj1;
1666 vlib_buffer_t *p0, *p1;
1667 ip6_header_t *ip0, *ip1;
1668 u32 pi0, rw_len0, next0, error0, adj_index0;
1669 u32 pi1, rw_len1, next1, error1, adj_index1;
1670 u32 tx_sw_if_index0, tx_sw_if_index1;
1671 bool is_locally_originated0, is_locally_originated1;
1673 /* Prefetch next iteration. */
1675 vlib_buffer_t *p2, *p3;
1677 p2 = vlib_get_buffer (vm, from[2]);
1678 p3 = vlib_get_buffer (vm, from[3]);
1680 vlib_prefetch_buffer_header (p2, LOAD);
1681 vlib_prefetch_buffer_header (p3, LOAD);
1683 CLIB_PREFETCH (p2->pre_data, 32, STORE);
1684 CLIB_PREFETCH (p3->pre_data, 32, STORE);
1686 CLIB_PREFETCH (p2->data, sizeof (ip0[0]), STORE);
1687 CLIB_PREFETCH (p3->data, sizeof (ip0[0]), STORE);
1690 pi0 = to_next[0] = from[0];
1691 pi1 = to_next[1] = from[1];
1696 n_left_to_next -= 2;
1698 p0 = vlib_get_buffer (vm, pi0);
1699 p1 = vlib_get_buffer (vm, pi1);
1701 adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
1702 adj_index1 = vnet_buffer (p1)->ip.adj_index[VLIB_TX];
1704 ip0 = vlib_buffer_get_current (p0);
1705 ip1 = vlib_buffer_get_current (p1);
1707 error0 = error1 = IP6_ERROR_NONE;
1708 next0 = next1 = IP6_REWRITE_NEXT_DROP;
1710 is_locally_originated0 =
1711 p0->flags & VNET_BUFFER_F_LOCALLY_ORIGINATED;
1712 if (PREDICT_TRUE (!is_locally_originated0))
1714 i32 hop_limit0 = ip0->hop_limit;
1716 /* Input node should have reject packets with hop limit 0. */
1717 ASSERT (ip0->hop_limit > 0);
1721 ip0->hop_limit = hop_limit0;
1724 * If the hop count drops below 1 when forwarding, generate
1727 if (PREDICT_FALSE (hop_limit0 <= 0))
1729 error0 = IP6_ERROR_TIME_EXPIRED;
1730 next0 = IP6_REWRITE_NEXT_ICMP_ERROR;
1731 vnet_buffer (p0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
1732 icmp6_error_set_vnet_buffer (p0, ICMP6_time_exceeded,
1733 ICMP6_time_exceeded_ttl_exceeded_in_transit,
1739 p0->flags &= ~VNET_BUFFER_F_LOCALLY_ORIGINATED;
1741 is_locally_originated1 =
1742 p1->flags & VNET_BUFFER_F_LOCALLY_ORIGINATED;
1743 if (PREDICT_TRUE (!is_locally_originated1))
1745 i32 hop_limit1 = ip1->hop_limit;
1747 /* Input node should have reject packets with hop limit 0. */
1748 ASSERT (ip1->hop_limit > 0);
1752 ip1->hop_limit = hop_limit1;
1755 * If the hop count drops below 1 when forwarding, generate
1758 if (PREDICT_FALSE (hop_limit1 <= 0))
1760 error1 = IP6_ERROR_TIME_EXPIRED;
1761 next1 = IP6_REWRITE_NEXT_ICMP_ERROR;
1762 vnet_buffer (p1)->sw_if_index[VLIB_TX] = (u32) ~ 0;
1763 icmp6_error_set_vnet_buffer (p1, ICMP6_time_exceeded,
1764 ICMP6_time_exceeded_ttl_exceeded_in_transit,
1770 p1->flags &= ~VNET_BUFFER_F_LOCALLY_ORIGINATED;
1772 adj0 = adj_get (adj_index0);
1773 adj1 = adj_get (adj_index1);
1775 rw_len0 = adj0[0].rewrite_header.data_bytes;
1776 rw_len1 = adj1[0].rewrite_header.data_bytes;
1777 vnet_buffer (p0)->ip.save_rewrite_length = rw_len0;
1778 vnet_buffer (p1)->ip.save_rewrite_length = rw_len1;
1782 vlib_increment_combined_counter
1783 (&adjacency_counters,
1784 thread_index, adj_index0, 1,
1785 vlib_buffer_length_in_chain (vm, p0) + rw_len0);
1786 vlib_increment_combined_counter
1787 (&adjacency_counters,
1788 thread_index, adj_index1, 1,
1789 vlib_buffer_length_in_chain (vm, p1) + rw_len1);
1792 /* Check MTU of outgoing interface. */
1794 clib_net_to_host_u16 (ip0->payload_length) +
1795 sizeof (ip6_header_t);
1797 clib_net_to_host_u16 (ip1->payload_length) +
1798 sizeof (ip6_header_t);
1799 if (p0->flags & VNET_BUFFER_F_GSO)
1800 ip0_len = gso_mtu_sz (p0);
1801 if (p1->flags & VNET_BUFFER_F_GSO)
1802 ip1_len = gso_mtu_sz (p1);
1806 ip6_mtu_check (p0, ip0_len,
1807 adj0[0].rewrite_header.max_l3_packet_bytes,
1808 is_locally_originated0, &next0, is_midchain,
1810 ip6_mtu_check (p1, ip1_len,
1811 adj1[0].rewrite_header.max_l3_packet_bytes,
1812 is_locally_originated1, &next1, is_midchain,
1815 /* Don't adjust the buffer for hop count issue; icmp-error node
1816 * wants to see the IP header */
1817 if (PREDICT_TRUE (error0 == IP6_ERROR_NONE))
1819 p0->current_data -= rw_len0;
1820 p0->current_length += rw_len0;
1822 tx_sw_if_index0 = adj0[0].rewrite_header.sw_if_index;
1823 vnet_buffer (p0)->sw_if_index[VLIB_TX] = tx_sw_if_index0;
1824 next0 = adj0[0].rewrite_header.next_index;
1827 (adj0[0].rewrite_header.flags & VNET_REWRITE_HAS_FEATURES))
1828 vnet_feature_arc_start (lm->output_feature_arc_index,
1829 tx_sw_if_index0, &next0, p0);
1833 p0->error = error_node->errors[error0];
1835 if (PREDICT_TRUE (error1 == IP6_ERROR_NONE))
1837 p1->current_data -= rw_len1;
1838 p1->current_length += rw_len1;
1840 tx_sw_if_index1 = adj1[0].rewrite_header.sw_if_index;
1841 vnet_buffer (p1)->sw_if_index[VLIB_TX] = tx_sw_if_index1;
1842 next1 = adj1[0].rewrite_header.next_index;
1845 (adj1[0].rewrite_header.flags & VNET_REWRITE_HAS_FEATURES))
1846 vnet_feature_arc_start (lm->output_feature_arc_index,
1847 tx_sw_if_index1, &next1, p1);
1851 p1->error = error_node->errors[error1];
1856 /* before we paint on the next header, update the L4
1857 * checksums if required, since there's no offload on a tunnel */
1858 calc_checksums (vm, p0);
1859 calc_checksums (vm, p1);
1862 /* Guess we are only writing on simple Ethernet header. */
1863 vnet_rewrite_two_headers (adj0[0], adj1[0],
1864 ip0, ip1, sizeof (ethernet_header_t));
1868 if (adj0->sub_type.midchain.fixup_func)
1869 adj0->sub_type.midchain.fixup_func
1870 (vm, adj0, p0, adj0->sub_type.midchain.fixup_data);
1871 if (adj1->sub_type.midchain.fixup_func)
1872 adj1->sub_type.midchain.fixup_func
1873 (vm, adj1, p1, adj1->sub_type.midchain.fixup_data);
1878 * copy bytes from the IP address into the MAC rewrite
1880 vnet_ip_mcast_fixup_header (IP6_MCAST_ADDR_MASK,
1882 rewrite_header.dst_mcast_offset,
1883 &ip0->dst_address.as_u32[3],
1885 vnet_ip_mcast_fixup_header (IP6_MCAST_ADDR_MASK,
1887 rewrite_header.dst_mcast_offset,
1888 &ip1->dst_address.as_u32[3],
1892 vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
1893 to_next, n_left_to_next,
1894 pi0, pi1, next0, next1);
1897 while (n_left_from > 0 && n_left_to_next > 0)
1899 ip_adjacency_t *adj0;
1903 u32 adj_index0, next0, error0;
1904 u32 tx_sw_if_index0;
1905 bool is_locally_originated0;
1907 pi0 = to_next[0] = from[0];
1909 p0 = vlib_get_buffer (vm, pi0);
1911 adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
1913 adj0 = adj_get (adj_index0);
1915 ip0 = vlib_buffer_get_current (p0);
1917 error0 = IP6_ERROR_NONE;
1918 next0 = IP6_REWRITE_NEXT_DROP;
1920 /* Check hop limit */
1921 is_locally_originated0 =
1922 p0->flags & VNET_BUFFER_F_LOCALLY_ORIGINATED;
1923 if (PREDICT_TRUE (!is_locally_originated0))
1925 i32 hop_limit0 = ip0->hop_limit;
1927 ASSERT (ip0->hop_limit > 0);
1931 ip0->hop_limit = hop_limit0;
1933 if (PREDICT_FALSE (hop_limit0 <= 0))
1936 * If the hop count drops below 1 when forwarding, generate
1939 error0 = IP6_ERROR_TIME_EXPIRED;
1940 next0 = IP6_REWRITE_NEXT_ICMP_ERROR;
1941 vnet_buffer (p0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
1942 icmp6_error_set_vnet_buffer (p0, ICMP6_time_exceeded,
1943 ICMP6_time_exceeded_ttl_exceeded_in_transit,
1949 p0->flags &= ~VNET_BUFFER_F_LOCALLY_ORIGINATED;
1954 calc_checksums (vm, p0);
1957 /* Guess we are only writing on simple Ethernet header. */
1958 vnet_rewrite_one_header (adj0[0], ip0, sizeof (ethernet_header_t));
1960 /* Update packet buffer attributes/set output interface. */
1961 rw_len0 = adj0[0].rewrite_header.data_bytes;
1962 vnet_buffer (p0)->ip.save_rewrite_length = rw_len0;
1966 vlib_increment_combined_counter
1967 (&adjacency_counters,
1968 thread_index, adj_index0, 1,
1969 vlib_buffer_length_in_chain (vm, p0) + rw_len0);
1972 /* Check MTU of outgoing interface. */
1974 clib_net_to_host_u16 (ip0->payload_length) +
1975 sizeof (ip6_header_t);
1976 if (p0->flags & VNET_BUFFER_F_GSO)
1977 ip0_len = gso_mtu_sz (p0);
1979 ip6_mtu_check (p0, ip0_len,
1980 adj0[0].rewrite_header.max_l3_packet_bytes,
1981 is_locally_originated0, &next0, is_midchain,
1984 /* Don't adjust the buffer for hop count issue; icmp-error node
1985 * wants to see the IP header */
1986 if (PREDICT_TRUE (error0 == IP6_ERROR_NONE))
1988 p0->current_data -= rw_len0;
1989 p0->current_length += rw_len0;
1991 tx_sw_if_index0 = adj0[0].rewrite_header.sw_if_index;
1993 vnet_buffer (p0)->sw_if_index[VLIB_TX] = tx_sw_if_index0;
1994 next0 = adj0[0].rewrite_header.next_index;
1997 (adj0[0].rewrite_header.flags & VNET_REWRITE_HAS_FEATURES))
1998 vnet_feature_arc_start (lm->output_feature_arc_index,
1999 tx_sw_if_index0, &next0, p0);
2003 p0->error = error_node->errors[error0];
2008 if (adj0->sub_type.midchain.fixup_func)
2009 adj0->sub_type.midchain.fixup_func
2010 (vm, adj0, p0, adj0->sub_type.midchain.fixup_data);
2014 vnet_ip_mcast_fixup_header (IP6_MCAST_ADDR_MASK,
2016 rewrite_header.dst_mcast_offset,
2017 &ip0->dst_address.as_u32[3],
2024 n_left_to_next -= 1;
2026 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
2027 to_next, n_left_to_next,
2031 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2034 /* Need to do trace after rewrites to pick up new packet data. */
2035 if (node->flags & VLIB_NODE_FLAG_TRACE)
2036 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
2038 return frame->n_vectors;
2042 ip6_rewrite_inline (vlib_main_t * vm,
2043 vlib_node_runtime_t * node,
2044 vlib_frame_t * frame,
2045 int do_counters, int is_midchain, int is_mcast)
2047 return ip6_rewrite_inline_with_gso (vm, node, frame, do_counters,
2048 is_midchain, is_mcast);
2051 VLIB_NODE_FN (ip6_rewrite_node) (vlib_main_t * vm,
2052 vlib_node_runtime_t * node,
2053 vlib_frame_t * frame)
2055 if (adj_are_counters_enabled ())
2056 return ip6_rewrite_inline (vm, node, frame, 1, 0, 0);
2058 return ip6_rewrite_inline (vm, node, frame, 0, 0, 0);
2061 VLIB_NODE_FN (ip6_rewrite_bcast_node) (vlib_main_t * vm,
2062 vlib_node_runtime_t * node,
2063 vlib_frame_t * frame)
2065 if (adj_are_counters_enabled ())
2066 return ip6_rewrite_inline (vm, node, frame, 1, 0, 0);
2068 return ip6_rewrite_inline (vm, node, frame, 0, 0, 0);
2071 VLIB_NODE_FN (ip6_rewrite_mcast_node) (vlib_main_t * vm,
2072 vlib_node_runtime_t * node,
2073 vlib_frame_t * frame)
2075 if (adj_are_counters_enabled ())
2076 return ip6_rewrite_inline (vm, node, frame, 1, 0, 1);
2078 return ip6_rewrite_inline (vm, node, frame, 0, 0, 1);
2081 VLIB_NODE_FN (ip6_midchain_node) (vlib_main_t * vm,
2082 vlib_node_runtime_t * node,
2083 vlib_frame_t * frame)
2085 if (adj_are_counters_enabled ())
2086 return ip6_rewrite_inline (vm, node, frame, 1, 1, 0);
2088 return ip6_rewrite_inline (vm, node, frame, 0, 1, 0);
2091 VLIB_NODE_FN (ip6_mcast_midchain_node) (vlib_main_t * vm,
2092 vlib_node_runtime_t * node,
2093 vlib_frame_t * frame)
2095 if (adj_are_counters_enabled ())
2096 return ip6_rewrite_inline (vm, node, frame, 1, 1, 1);
2098 return ip6_rewrite_inline (vm, node, frame, 0, 1, 1);
2102 VLIB_REGISTER_NODE (ip6_midchain_node) =
2104 .name = "ip6-midchain",
2105 .vector_size = sizeof (u32),
2106 .format_trace = format_ip6_forward_next_trace,
2107 .sibling_of = "ip6-rewrite",
2110 VLIB_REGISTER_NODE (ip6_rewrite_node) =
2112 .name = "ip6-rewrite",
2113 .vector_size = sizeof (u32),
2114 .format_trace = format_ip6_rewrite_trace,
2115 .n_next_nodes = IP6_REWRITE_N_NEXT,
2118 [IP6_REWRITE_NEXT_DROP] = "ip6-drop",
2119 [IP6_REWRITE_NEXT_ICMP_ERROR] = "ip6-icmp-error",
2120 [IP6_REWRITE_NEXT_FRAGMENT] = "ip6-frag",
2124 VLIB_REGISTER_NODE (ip6_rewrite_bcast_node) = {
2125 .name = "ip6-rewrite-bcast",
2126 .vector_size = sizeof (u32),
2128 .format_trace = format_ip6_rewrite_trace,
2129 .sibling_of = "ip6-rewrite",
2132 VLIB_REGISTER_NODE (ip6_rewrite_mcast_node) =
2134 .name = "ip6-rewrite-mcast",
2135 .vector_size = sizeof (u32),
2136 .format_trace = format_ip6_rewrite_trace,
2137 .sibling_of = "ip6-rewrite",
2141 VLIB_REGISTER_NODE (ip6_mcast_midchain_node) =
2143 .name = "ip6-mcast-midchain",
2144 .vector_size = sizeof (u32),
2145 .format_trace = format_ip6_rewrite_trace,
2146 .sibling_of = "ip6-rewrite",
2152 * Hop-by-Hop handling
2154 #ifndef CLIB_MARCH_VARIANT
2155 ip6_hop_by_hop_main_t ip6_hop_by_hop_main;
2156 #endif /* CLIB_MARCH_VARIANT */
2158 #define foreach_ip6_hop_by_hop_error \
2159 _(PROCESSED, "pkts with ip6 hop-by-hop options") \
2160 _(FORMAT, "incorrectly formatted hop-by-hop options") \
2161 _(UNKNOWN_OPTION, "unknown ip6 hop-by-hop options")
2166 #define _(sym,str) IP6_HOP_BY_HOP_ERROR_##sym,
2167 foreach_ip6_hop_by_hop_error
2169 IP6_HOP_BY_HOP_N_ERROR,
2170 } ip6_hop_by_hop_error_t;
2174 * Primary h-b-h handler trace support
2175 * We work pretty hard on the problem for obvious reasons
2181 u8 option_data[256];
2182 } ip6_hop_by_hop_trace_t;
2184 extern vlib_node_registration_t ip6_hop_by_hop_node;
2186 static char *ip6_hop_by_hop_error_strings[] = {
2187 #define _(sym,string) string,
2188 foreach_ip6_hop_by_hop_error
2192 #ifndef CLIB_MARCH_VARIANT
2194 format_ip6_hop_by_hop_ext_hdr (u8 * s, va_list * args)
2196 ip6_hop_by_hop_header_t *hbh0 = va_arg (*args, ip6_hop_by_hop_header_t *);
2197 int total_len = va_arg (*args, int);
2198 ip6_hop_by_hop_option_t *opt0, *limit0;
2199 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2202 s = format (s, "IP6_HOP_BY_HOP: next protocol %d len %d total %d",
2203 hbh0->protocol, (hbh0->length + 1) << 3, total_len);
2205 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2206 limit0 = (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 + total_len);
2208 while (opt0 < limit0)
2213 case 0: /* Pad, just stop */
2214 opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0 + 1);
2218 if (hm->trace[type0])
2220 s = (*hm->trace[type0]) (s, opt0);
2225 format (s, "\n unrecognized option %d length %d", type0,
2229 (ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length +
2230 sizeof (ip6_hop_by_hop_option_t));
2239 format_ip6_hop_by_hop_trace (u8 * s, va_list * args)
2241 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
2242 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
2243 ip6_hop_by_hop_trace_t *t = va_arg (*args, ip6_hop_by_hop_trace_t *);
2244 ip6_hop_by_hop_header_t *hbh0;
2245 ip6_hop_by_hop_option_t *opt0, *limit0;
2246 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2250 hbh0 = (ip6_hop_by_hop_header_t *) t->option_data;
2252 s = format (s, "IP6_HOP_BY_HOP: next index %d len %d traced %d",
2253 t->next_index, (hbh0->length + 1) << 3, t->trace_len);
2255 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2256 limit0 = (ip6_hop_by_hop_option_t *) ((u8 *) hbh0) + t->trace_len;
2258 while (opt0 < limit0)
2263 case 0: /* Pad, just stop */
2264 opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0) + 1;
2268 if (hm->trace[type0])
2270 s = (*hm->trace[type0]) (s, opt0);
2275 format (s, "\n unrecognized option %d length %d", type0,
2279 (ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length +
2280 sizeof (ip6_hop_by_hop_option_t));
2288 ip6_scan_hbh_options (vlib_buffer_t * b0,
2290 ip6_hop_by_hop_header_t * hbh0,
2291 ip6_hop_by_hop_option_t * opt0,
2292 ip6_hop_by_hop_option_t * limit0, u32 * next0)
2294 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2298 while (opt0 < limit0)
2304 opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0) + 1;
2309 if (hm->options[type0])
2311 if ((*hm->options[type0]) (b0, ip0, opt0) < 0)
2313 error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2319 /* Unrecognized mandatory option, check the two high order bits */
2320 switch (opt0->type & HBH_OPTION_TYPE_HIGH_ORDER_BITS)
2322 case HBH_OPTION_TYPE_SKIP_UNKNOWN:
2324 case HBH_OPTION_TYPE_DISCARD_UNKNOWN:
2325 error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2326 *next0 = IP_LOOKUP_NEXT_DROP;
2328 case HBH_OPTION_TYPE_DISCARD_UNKNOWN_ICMP:
2329 error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2330 *next0 = IP_LOOKUP_NEXT_ICMP_ERROR;
2331 icmp6_error_set_vnet_buffer (b0, ICMP6_parameter_problem,
2332 ICMP6_parameter_problem_unrecognized_option,
2333 (u8 *) opt0 - (u8 *) ip0);
2335 case HBH_OPTION_TYPE_DISCARD_UNKNOWN_ICMP_NOT_MCAST:
2336 error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2337 if (!ip6_address_is_multicast (&ip0->dst_address))
2339 *next0 = IP_LOOKUP_NEXT_ICMP_ERROR;
2340 icmp6_error_set_vnet_buffer (b0,
2341 ICMP6_parameter_problem,
2342 ICMP6_parameter_problem_unrecognized_option,
2343 (u8 *) opt0 - (u8 *) ip0);
2347 *next0 = IP_LOOKUP_NEXT_DROP;
2355 (ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length +
2356 sizeof (ip6_hop_by_hop_option_t));
2362 * Process the Hop-by-Hop Options header
2364 VLIB_NODE_FN (ip6_hop_by_hop_node) (vlib_main_t * vm,
2365 vlib_node_runtime_t * node,
2366 vlib_frame_t * frame)
2368 vlib_node_runtime_t *error_node =
2369 vlib_node_get_runtime (vm, ip6_hop_by_hop_node.index);
2370 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2371 u32 n_left_from, *from, *to_next;
2372 ip_lookup_next_t next_index;
2374 from = vlib_frame_vector_args (frame);
2375 n_left_from = frame->n_vectors;
2376 next_index = node->cached_next_index;
2378 while (n_left_from > 0)
2382 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
2384 while (n_left_from >= 4 && n_left_to_next >= 2)
2387 vlib_buffer_t *b0, *b1;
2389 ip6_header_t *ip0, *ip1;
2390 ip6_hop_by_hop_header_t *hbh0, *hbh1;
2391 ip6_hop_by_hop_option_t *opt0, *limit0, *opt1, *limit1;
2392 u8 error0 = 0, error1 = 0;
2394 /* Prefetch next iteration. */
2396 vlib_buffer_t *p2, *p3;
2398 p2 = vlib_get_buffer (vm, from[2]);
2399 p3 = vlib_get_buffer (vm, from[3]);
2401 vlib_prefetch_buffer_header (p2, LOAD);
2402 vlib_prefetch_buffer_header (p3, LOAD);
2404 CLIB_PREFETCH (p2->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
2405 CLIB_PREFETCH (p3->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
2408 /* Speculatively enqueue b0, b1 to the current next frame */
2409 to_next[0] = bi0 = from[0];
2410 to_next[1] = bi1 = from[1];
2414 n_left_to_next -= 2;
2416 b0 = vlib_get_buffer (vm, bi0);
2417 b1 = vlib_get_buffer (vm, bi1);
2419 /* Default use the next_index from the adjacency. A HBH option rarely redirects to a different node */
2420 u32 adj_index0 = vnet_buffer (b0)->ip.adj_index[VLIB_TX];
2421 ip_adjacency_t *adj0 = adj_get (adj_index0);
2422 u32 adj_index1 = vnet_buffer (b1)->ip.adj_index[VLIB_TX];
2423 ip_adjacency_t *adj1 = adj_get (adj_index1);
2425 /* Default use the next_index from the adjacency. A HBH option rarely redirects to a different node */
2426 next0 = adj0->lookup_next_index;
2427 next1 = adj1->lookup_next_index;
2429 ip0 = vlib_buffer_get_current (b0);
2430 ip1 = vlib_buffer_get_current (b1);
2431 hbh0 = (ip6_hop_by_hop_header_t *) (ip0 + 1);
2432 hbh1 = (ip6_hop_by_hop_header_t *) (ip1 + 1);
2433 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2434 opt1 = (ip6_hop_by_hop_option_t *) (hbh1 + 1);
2436 (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 +
2437 ((hbh0->length + 1) << 3));
2439 (ip6_hop_by_hop_option_t *) ((u8 *) hbh1 +
2440 ((hbh1->length + 1) << 3));
2443 * Basic validity checks
2445 if ((hbh0->length + 1) << 3 >
2446 clib_net_to_host_u16 (ip0->payload_length))
2448 error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2449 next0 = IP_LOOKUP_NEXT_DROP;
2452 /* Scan the set of h-b-h options, process ones that we understand */
2453 error0 = ip6_scan_hbh_options (b0, ip0, hbh0, opt0, limit0, &next0);
2455 if ((hbh1->length + 1) << 3 >
2456 clib_net_to_host_u16 (ip1->payload_length))
2458 error1 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2459 next1 = IP_LOOKUP_NEXT_DROP;
2462 /* Scan the set of h-b-h options, process ones that we understand */
2463 error1 = ip6_scan_hbh_options (b1, ip1, hbh1, opt1, limit1, &next1);
2466 /* Has the classifier flagged this buffer for special treatment? */
2469 && (vnet_buffer (b0)->l2_classify.opaque_index & OI_DECAP)))
2470 next0 = hm->next_override;
2472 /* Has the classifier flagged this buffer for special treatment? */
2475 && (vnet_buffer (b1)->l2_classify.opaque_index & OI_DECAP)))
2476 next1 = hm->next_override;
2478 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)))
2480 if (b0->flags & VLIB_BUFFER_IS_TRACED)
2482 ip6_hop_by_hop_trace_t *t =
2483 vlib_add_trace (vm, node, b0, sizeof (*t));
2484 u32 trace_len = (hbh0->length + 1) << 3;
2485 t->next_index = next0;
2486 /* Capture the h-b-h option verbatim */
2489 ARRAY_LEN (t->option_data) ? trace_len :
2490 ARRAY_LEN (t->option_data);
2491 t->trace_len = trace_len;
2492 clib_memcpy_fast (t->option_data, hbh0, trace_len);
2494 if (b1->flags & VLIB_BUFFER_IS_TRACED)
2496 ip6_hop_by_hop_trace_t *t =
2497 vlib_add_trace (vm, node, b1, sizeof (*t));
2498 u32 trace_len = (hbh1->length + 1) << 3;
2499 t->next_index = next1;
2500 /* Capture the h-b-h option verbatim */
2503 ARRAY_LEN (t->option_data) ? trace_len :
2504 ARRAY_LEN (t->option_data);
2505 t->trace_len = trace_len;
2506 clib_memcpy_fast (t->option_data, hbh1, trace_len);
2511 b0->error = error_node->errors[error0];
2512 b1->error = error_node->errors[error1];
2514 /* verify speculative enqueue, maybe switch current next frame */
2515 vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
2516 n_left_to_next, bi0, bi1, next0,
2520 while (n_left_from > 0 && n_left_to_next > 0)
2526 ip6_hop_by_hop_header_t *hbh0;
2527 ip6_hop_by_hop_option_t *opt0, *limit0;
2530 /* Speculatively enqueue b0 to the current next frame */
2536 n_left_to_next -= 1;
2538 b0 = vlib_get_buffer (vm, bi0);
2540 * Default use the next_index from the adjacency.
2541 * A HBH option rarely redirects to a different node
2543 u32 adj_index0 = vnet_buffer (b0)->ip.adj_index[VLIB_TX];
2544 ip_adjacency_t *adj0 = adj_get (adj_index0);
2545 next0 = adj0->lookup_next_index;
2547 ip0 = vlib_buffer_get_current (b0);
2548 hbh0 = (ip6_hop_by_hop_header_t *) (ip0 + 1);
2549 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2551 (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 +
2552 ((hbh0->length + 1) << 3));
2555 * Basic validity checks
2557 if ((hbh0->length + 1) << 3 >
2558 clib_net_to_host_u16 (ip0->payload_length))
2560 error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2561 next0 = IP_LOOKUP_NEXT_DROP;
2565 /* Scan the set of h-b-h options, process ones that we understand */
2566 error0 = ip6_scan_hbh_options (b0, ip0, hbh0, opt0, limit0, &next0);
2569 /* Has the classifier flagged this buffer for special treatment? */
2572 && (vnet_buffer (b0)->l2_classify.opaque_index & OI_DECAP)))
2573 next0 = hm->next_override;
2575 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
2577 ip6_hop_by_hop_trace_t *t =
2578 vlib_add_trace (vm, node, b0, sizeof (*t));
2579 u32 trace_len = (hbh0->length + 1) << 3;
2580 t->next_index = next0;
2581 /* Capture the h-b-h option verbatim */
2584 ARRAY_LEN (t->option_data) ? trace_len :
2585 ARRAY_LEN (t->option_data);
2586 t->trace_len = trace_len;
2587 clib_memcpy_fast (t->option_data, hbh0, trace_len);
2590 b0->error = error_node->errors[error0];
2592 /* verify speculative enqueue, maybe switch current next frame */
2593 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
2594 n_left_to_next, bi0, next0);
2596 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2598 return frame->n_vectors;
2602 VLIB_REGISTER_NODE (ip6_hop_by_hop_node) =
2604 .name = "ip6-hop-by-hop",
2605 .sibling_of = "ip6-lookup",
2606 .vector_size = sizeof (u32),
2607 .format_trace = format_ip6_hop_by_hop_trace,
2608 .type = VLIB_NODE_TYPE_INTERNAL,
2609 .n_errors = ARRAY_LEN (ip6_hop_by_hop_error_strings),
2610 .error_strings = ip6_hop_by_hop_error_strings,
2615 static clib_error_t *
2616 ip6_hop_by_hop_init (vlib_main_t * vm)
2618 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2619 clib_memset (hm->options, 0, sizeof (hm->options));
2620 clib_memset (hm->trace, 0, sizeof (hm->trace));
2621 hm->next_override = IP6_LOOKUP_NEXT_POP_HOP_BY_HOP;
2625 VLIB_INIT_FUNCTION (ip6_hop_by_hop_init);
2627 #ifndef CLIB_MARCH_VARIANT
2629 ip6_hbh_set_next_override (uword next)
2631 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2633 hm->next_override = next;
2637 ip6_hbh_register_option (u8 option,
2638 int options (vlib_buffer_t * b, ip6_header_t * ip,
2639 ip6_hop_by_hop_option_t * opt),
2640 u8 * trace (u8 * s, ip6_hop_by_hop_option_t * opt))
2642 ip6_main_t *im = &ip6_main;
2643 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2645 ASSERT ((u32) option < ARRAY_LEN (hm->options));
2647 /* Already registered */
2648 if (hm->options[option])
2651 hm->options[option] = options;
2652 hm->trace[option] = trace;
2654 /* Set global variable */
2655 im->hbh_enabled = 1;
2661 ip6_hbh_unregister_option (u8 option)
2663 ip6_main_t *im = &ip6_main;
2664 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2666 ASSERT ((u32) option < ARRAY_LEN (hm->options));
2668 /* Not registered */
2669 if (!hm->options[option])
2672 hm->options[option] = NULL;
2673 hm->trace[option] = NULL;
2675 /* Disable global knob if this was the last option configured */
2678 for (i = 0; i < 256; i++)
2680 if (hm->options[option])
2687 im->hbh_enabled = 0;
2692 /* Global IP6 main. */
2693 ip6_main_t ip6_main;
2696 static clib_error_t *
2697 ip6_lookup_init (vlib_main_t * vm)
2699 ip6_main_t *im = &ip6_main;
2700 clib_error_t *error;
2703 if ((error = vlib_call_init_function (vm, vnet_feature_init)))
2706 for (i = 0; i < ARRAY_LEN (im->fib_masks); i++)
2713 for (j = 0; j < i0; j++)
2714 im->fib_masks[i].as_u32[j] = ~0;
2717 im->fib_masks[i].as_u32[i0] =
2718 clib_host_to_net_u32 (pow2_mask (i1) << (32 - i1));
2721 ip_lookup_init (&im->lookup_main, /* is_ip6 */ 1);
2723 if (im->lookup_table_nbuckets == 0)
2724 im->lookup_table_nbuckets = IP6_FIB_DEFAULT_HASH_NUM_BUCKETS;
2726 im->lookup_table_nbuckets = 1 << max_log2 (im->lookup_table_nbuckets);
2728 if (im->lookup_table_size == 0)
2729 im->lookup_table_size = IP6_FIB_DEFAULT_HASH_MEMORY_SIZE;
2731 clib_bihash_init_24_8 (&(im->ip6_table[IP6_FIB_TABLE_FWDING].ip6_hash),
2732 "ip6 FIB fwding table",
2733 im->lookup_table_nbuckets, im->lookup_table_size);
2734 clib_bihash_init_24_8 (&im->ip6_table[IP6_FIB_TABLE_NON_FWDING].ip6_hash,
2735 "ip6 FIB non-fwding table",
2736 im->lookup_table_nbuckets, im->lookup_table_size);
2737 clib_bihash_init_40_8 (&im->ip6_mtable.ip6_mhash,
2739 im->lookup_table_nbuckets, im->lookup_table_size);
2741 /* Create FIB with index 0 and table id of 0. */
2742 fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6, 0,
2743 FIB_SOURCE_DEFAULT_ROUTE);
2744 mfib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6, 0,
2745 MFIB_SOURCE_DEFAULT_ROUTE);
2749 pn = pg_get_node (ip6_lookup_node.index);
2750 pn->unformat_edit = unformat_pg_ip6_header;
2753 /* Unless explicitly configured, don't process HBH options */
2754 im->hbh_enabled = 0;
2759 VLIB_INIT_FUNCTION (ip6_lookup_init);
2761 #ifndef CLIB_MARCH_VARIANT
2763 vnet_set_ip6_flow_hash (u32 table_id, u32 flow_hash_config)
2767 fib_index = fib_table_find (FIB_PROTOCOL_IP6, table_id);
2769 if (~0 == fib_index)
2770 return VNET_API_ERROR_NO_SUCH_FIB;
2772 fib_table_set_flow_hash_config (fib_index, FIB_PROTOCOL_IP6,
2779 static clib_error_t *
2780 set_ip6_flow_hash_command_fn (vlib_main_t * vm,
2781 unformat_input_t * input,
2782 vlib_cli_command_t * cmd)
2786 u32 flow_hash_config = 0;
2789 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
2791 if (unformat (input, "table %d", &table_id))
2794 else if (unformat (input, #a)) { flow_hash_config |= v; matched=1;}
2795 foreach_flow_hash_bit
2802 return clib_error_return (0, "unknown input `%U'",
2803 format_unformat_error, input);
2805 rv = vnet_set_ip6_flow_hash (table_id, flow_hash_config);
2812 return clib_error_return (0, "no such FIB table %d", table_id);
2815 clib_warning ("BUG: illegal flow hash config 0x%x", flow_hash_config);
2823 * Configure the set of IPv6 fields used by the flow hash.
2827 * Example of how to set the flow hash on a given table:
2828 * @cliexcmd{set ip6 flow-hash table 8 dst sport dport proto}
2830 * Example of display the configured flow hash:
2831 * @cliexstart{show ip6 fib}
2832 * ipv6-VRF:0, fib_index 0, flow hash: src dst sport dport proto
2835 * [@0]: dpo-load-balance: [index:5 buckets:1 uRPF:5 to:[0:0]]
2836 * [0] [@0]: dpo-drop ip6
2839 * [@0]: dpo-load-balance: [index:10 buckets:1 uRPF:10 to:[0:0]]
2840 * [0] [@2]: dpo-receive
2843 * [@0]: dpo-load-balance: [index:8 buckets:1 uRPF:8 to:[0:0]]
2844 * [0] [@2]: dpo-receive
2847 * [@0]: dpo-load-balance: [index:7 buckets:1 uRPF:7 to:[0:0]]
2848 * [0] [@2]: dpo-receive
2851 * [@0]: dpo-load-balance: [index:9 buckets:1 uRPF:9 to:[0:0]]
2852 * [0] [@2]: dpo-receive
2853 * ff02::1:ff00:0/104
2855 * [@0]: dpo-load-balance: [index:6 buckets:1 uRPF:6 to:[0:0]]
2856 * [0] [@2]: dpo-receive
2857 * ipv6-VRF:8, fib_index 1, flow hash: dst sport dport proto
2860 * [@0]: dpo-load-balance: [index:21 buckets:1 uRPF:20 to:[0:0]]
2861 * [0] [@0]: dpo-drop ip6
2864 * [@0]: dpo-load-balance: [index:27 buckets:1 uRPF:26 to:[0:0]]
2865 * [0] [@4]: ipv6-glean: af_packet0
2868 * [@0]: dpo-load-balance: [index:28 buckets:1 uRPF:27 to:[0:0]]
2869 * [0] [@2]: dpo-receive: @::a:1:1:0:7 on af_packet0
2872 * [@0]: dpo-load-balance: [index:26 buckets:1 uRPF:25 to:[0:0]]
2873 * [0] [@2]: dpo-receive
2874 * fe80::fe:3eff:fe3e:9222/128
2876 * [@0]: dpo-load-balance: [index:29 buckets:1 uRPF:28 to:[0:0]]
2877 * [0] [@2]: dpo-receive: fe80::fe:3eff:fe3e:9222 on af_packet0
2880 * [@0]: dpo-load-balance: [index:24 buckets:1 uRPF:23 to:[0:0]]
2881 * [0] [@2]: dpo-receive
2884 * [@0]: dpo-load-balance: [index:23 buckets:1 uRPF:22 to:[0:0]]
2885 * [0] [@2]: dpo-receive
2888 * [@0]: dpo-load-balance: [index:25 buckets:1 uRPF:24 to:[0:0]]
2889 * [0] [@2]: dpo-receive
2890 * ff02::1:ff00:0/104
2892 * [@0]: dpo-load-balance: [index:22 buckets:1 uRPF:21 to:[0:0]]
2893 * [0] [@2]: dpo-receive
2898 VLIB_CLI_COMMAND (set_ip6_flow_hash_command, static) =
2900 .path = "set ip6 flow-hash",
2902 "set ip6 flow-hash table <table-id> [src] [dst] [sport] [dport] [proto] [reverse]",
2903 .function = set_ip6_flow_hash_command_fn,
2907 static clib_error_t *
2908 show_ip6_local_command_fn (vlib_main_t * vm,
2909 unformat_input_t * input, vlib_cli_command_t * cmd)
2911 ip6_main_t *im = &ip6_main;
2912 ip_lookup_main_t *lm = &im->lookup_main;
2915 vlib_cli_output (vm, "Protocols handled by ip6_local");
2916 for (i = 0; i < ARRAY_LEN (lm->local_next_by_ip_protocol); i++)
2918 if (lm->local_next_by_ip_protocol[i] != IP_LOCAL_NEXT_PUNT)
2921 u32 node_index = vlib_get_node (vm,
2922 ip6_local_node.index)->
2923 next_nodes[lm->local_next_by_ip_protocol[i]];
2924 vlib_cli_output (vm, "%d: %U", i, format_vlib_node_name, vm,
2934 * Display the set of protocols handled by the local IPv6 stack.
2937 * Example of how to display local protocol table:
2938 * @cliexstart{show ip6 local}
2939 * Protocols handled by ip6_local
2947 VLIB_CLI_COMMAND (show_ip6_local, static) =
2949 .path = "show ip6 local",
2950 .function = show_ip6_local_command_fn,
2951 .short_help = "show ip6 local",
2955 #ifndef CLIB_MARCH_VARIANT
2957 vnet_set_ip6_classify_intfc (vlib_main_t * vm, u32 sw_if_index,
2960 vnet_main_t *vnm = vnet_get_main ();
2961 vnet_interface_main_t *im = &vnm->interface_main;
2962 ip6_main_t *ipm = &ip6_main;
2963 ip_lookup_main_t *lm = &ipm->lookup_main;
2964 vnet_classify_main_t *cm = &vnet_classify_main;
2965 ip6_address_t *if_addr;
2967 if (pool_is_free_index (im->sw_interfaces, sw_if_index))
2968 return VNET_API_ERROR_NO_MATCHING_INTERFACE;
2970 if (table_index != ~0 && pool_is_free_index (cm->tables, table_index))
2971 return VNET_API_ERROR_NO_SUCH_ENTRY;
2973 vec_validate (lm->classify_table_index_by_sw_if_index, sw_if_index);
2974 lm->classify_table_index_by_sw_if_index[sw_if_index] = table_index;
2976 if_addr = ip6_interface_first_address (ipm, sw_if_index);
2978 if (NULL != if_addr)
2980 fib_prefix_t pfx = {
2982 .fp_proto = FIB_PROTOCOL_IP6,
2983 .fp_addr.ip6 = *if_addr,
2987 fib_index = fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4,
2991 if (table_index != (u32) ~ 0)
2993 dpo_id_t dpo = DPO_INVALID;
2998 classify_dpo_create (DPO_PROTO_IP6, table_index));
3000 fib_table_entry_special_dpo_add (fib_index,
3002 FIB_SOURCE_CLASSIFY,
3003 FIB_ENTRY_FLAG_NONE, &dpo);
3008 fib_table_entry_special_remove (fib_index,
3009 &pfx, FIB_SOURCE_CLASSIFY);
3017 static clib_error_t *
3018 set_ip6_classify_command_fn (vlib_main_t * vm,
3019 unformat_input_t * input,
3020 vlib_cli_command_t * cmd)
3022 u32 table_index = ~0;
3023 int table_index_set = 0;
3024 u32 sw_if_index = ~0;
3027 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
3029 if (unformat (input, "table-index %d", &table_index))
3030 table_index_set = 1;
3031 else if (unformat (input, "intfc %U", unformat_vnet_sw_interface,
3032 vnet_get_main (), &sw_if_index))
3038 if (table_index_set == 0)
3039 return clib_error_return (0, "classify table-index must be specified");
3041 if (sw_if_index == ~0)
3042 return clib_error_return (0, "interface / subif must be specified");
3044 rv = vnet_set_ip6_classify_intfc (vm, sw_if_index, table_index);
3051 case VNET_API_ERROR_NO_MATCHING_INTERFACE:
3052 return clib_error_return (0, "No such interface");
3054 case VNET_API_ERROR_NO_SUCH_ENTRY:
3055 return clib_error_return (0, "No such classifier table");
3061 * Assign a classification table to an interface. The classification
3062 * table is created using the '<em>classify table</em>' and '<em>classify session</em>'
3063 * commands. Once the table is create, use this command to filter packets
3067 * Example of how to assign a classification table to an interface:
3068 * @cliexcmd{set ip6 classify intfc GigabitEthernet2/0/0 table-index 1}
3071 VLIB_CLI_COMMAND (set_ip6_classify_command, static) =
3073 .path = "set ip6 classify",
3075 "set ip6 classify intfc <interface> table-index <classify-idx>",
3076 .function = set_ip6_classify_command_fn,
3080 static clib_error_t *
3081 ip6_config (vlib_main_t * vm, unformat_input_t * input)
3083 ip6_main_t *im = &ip6_main;
3088 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
3090 if (unformat (input, "hash-buckets %d", &tmp))
3092 else if (unformat (input, "heap-size %U",
3093 unformat_memory_size, &heapsize))
3096 return clib_error_return (0, "unknown input '%U'",
3097 format_unformat_error, input);
3100 im->lookup_table_nbuckets = nbuckets;
3101 im->lookup_table_size = heapsize;
3106 VLIB_EARLY_CONFIG_FUNCTION (ip6_config, "ip6");
3109 * fd.io coding-style-patch-verification: ON
3112 * eval: (c-set-style "gnu")