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;
298 clib_error_t *error = NULL;
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_link_set_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");
349 vec_validate (im->fib_index_by_sw_if_index, sw_if_index);
350 vec_validate (im->mfib_index_by_sw_if_index, sw_if_index);
352 ip6_addr_fib_init (&ip6_af, address,
353 vec_elt (im->fib_index_by_sw_if_index, sw_if_index));
354 vec_add1 (addr_fib, ip6_af);
359 /* When adding an address check that it does not conflict
360 with an existing address on any interface in this table. */
361 ip_interface_address_t *ia;
362 vnet_sw_interface_t *sif;
364 pool_foreach(sif, vnm->interface_main.sw_interfaces,
366 if (im->fib_index_by_sw_if_index[sw_if_index] ==
367 im->fib_index_by_sw_if_index[sif->sw_if_index])
369 foreach_ip_interface_address
370 (&im->lookup_main, ia, sif->sw_if_index,
371 0 /* honor unnumbered */ ,
374 ip_interface_address_get_address
375 (&im->lookup_main, ia);
377 if (ip6_destination_matches_route
378 (im, address, x, ia->address_length) ||
379 ip6_destination_matches_route (im,
384 /* an intf may have >1 addr from the same prefix */
385 if ((sw_if_index == sif->sw_if_index) &&
386 (ia->address_length == address_length) &&
387 !ip6_address_is_equal (x, address))
390 if (ia->flags & IP_INTERFACE_ADDRESS_FLAG_STALE)
391 /* if the address we're comparing against is stale
392 * then the CP has not added this one back yet, maybe
393 * it never will, so we have to assume it won't and
394 * ignore it. if it does add it back, then it will fail
395 * because this one is now present */
398 /* error if the length or intf was different */
399 vnm->api_errno = VNET_API_ERROR_DUPLICATE_IF_ADDRESS;
400 error = clib_error_create
401 ("failed to add %U which conflicts with %U for interface %U",
402 format_ip6_address_and_length, address,
404 format_ip6_address_and_length, x,
406 format_vnet_sw_if_index_name, vnm,
416 if_address_index = ip_interface_address_find (lm, addr_fib, address_length);
420 if (~0 == if_address_index)
422 vnm->api_errno = VNET_API_ERROR_ADDRESS_NOT_FOUND_FOR_INTERFACE;
423 error = clib_error_create ("%U not found for interface %U",
424 lm->format_address_and_length,
425 addr_fib, address_length,
426 format_vnet_sw_if_index_name, vnm,
431 ip_interface_address_del (lm, if_address_index, addr_fib);
435 if (~0 != if_address_index)
437 ip_interface_address_t *ia;
439 ia = pool_elt_at_index (lm->if_address_pool, if_address_index);
441 if (ia->flags & IP_INTERFACE_ADDRESS_FLAG_STALE)
443 if (ia->sw_if_index == sw_if_index)
445 /* re-adding an address during the replace action.
446 * consdier this the update. clear the flag and
448 ia->flags &= ~IP_INTERFACE_ADDRESS_FLAG_STALE;
453 /* The prefix is moving from one interface to another.
454 * delete the stale and add the new */
455 ip6_add_del_interface_address (vm,
457 address, address_length, 1);
459 error = ip_interface_address_add (lm, sw_if_index,
460 addr_fib, address_length,
466 vnm->api_errno = VNET_API_ERROR_DUPLICATE_IF_ADDRESS;
467 error = clib_error_create
468 ("Prefix %U already found on interface %U",
469 lm->format_address_and_length, addr_fib, address_length,
470 format_vnet_sw_if_index_name, vnm, ia->sw_if_index);
474 error = ip_interface_address_add (lm, sw_if_index,
475 addr_fib, address_length,
482 ip6_sw_interface_enable_disable (sw_if_index, !is_del);
484 ip6_link_enable (sw_if_index, NULL);
486 /* intf addr routes are added/deleted on admin up/down */
487 if (vnet_sw_interface_is_admin_up (vnm, sw_if_index))
490 ip6_del_interface_routes (sw_if_index,
491 im, ip6_af.fib_index, address,
494 ip6_add_interface_routes (vnm, sw_if_index,
495 im, ip6_af.fib_index,
496 pool_elt_at_index (lm->if_address_pool,
500 ip6_add_del_interface_address_callback_t *cb;
501 vec_foreach (cb, im->add_del_interface_address_callbacks)
502 cb->function (im, cb->function_opaque, sw_if_index,
503 address, address_length, if_address_index, is_del);
506 ip6_link_disable (sw_if_index);
515 static clib_error_t *
516 ip6_sw_interface_admin_up_down (vnet_main_t * vnm, u32 sw_if_index, u32 flags)
518 ip6_main_t *im = &ip6_main;
519 ip_interface_address_t *ia;
521 u32 is_admin_up, fib_index;
523 /* Fill in lookup tables with default table (0). */
524 vec_validate (im->fib_index_by_sw_if_index, sw_if_index);
526 vec_validate_init_empty (im->
527 lookup_main.if_address_pool_index_by_sw_if_index,
530 is_admin_up = (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) != 0;
532 fib_index = vec_elt (im->fib_index_by_sw_if_index, sw_if_index);
535 foreach_ip_interface_address (&im->lookup_main, ia, sw_if_index,
536 0 /* honor unnumbered */,
538 a = ip_interface_address_get_address (&im->lookup_main, ia);
540 ip6_add_interface_routes (vnm, sw_if_index,
544 ip6_del_interface_routes (sw_if_index, im, fib_index,
545 a, ia->address_length);
552 VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION (ip6_sw_interface_admin_up_down);
554 /* Built-in ip6 unicast rx feature path definition */
556 VNET_FEATURE_ARC_INIT (ip6_unicast, static) =
558 .arc_name = "ip6-unicast",
559 .start_nodes = VNET_FEATURES ("ip6-input"),
560 .last_in_arc = "ip6-lookup",
561 .arc_index_ptr = &ip6_main.lookup_main.ucast_feature_arc_index,
564 VNET_FEATURE_INIT (ip6_flow_classify, static) =
566 .arc_name = "ip6-unicast",
567 .node_name = "ip6-flow-classify",
568 .runs_before = VNET_FEATURES ("ip6-inacl"),
571 VNET_FEATURE_INIT (ip6_inacl, static) =
573 .arc_name = "ip6-unicast",
574 .node_name = "ip6-inacl",
575 .runs_before = VNET_FEATURES ("ip6-policer-classify"),
578 VNET_FEATURE_INIT (ip6_policer_classify, static) =
580 .arc_name = "ip6-unicast",
581 .node_name = "ip6-policer-classify",
582 .runs_before = VNET_FEATURES ("ipsec6-input-feature"),
585 VNET_FEATURE_INIT (ip6_ipsec, static) =
587 .arc_name = "ip6-unicast",
588 .node_name = "ipsec6-input-feature",
589 .runs_before = VNET_FEATURES ("l2tp-decap"),
592 VNET_FEATURE_INIT (ip6_l2tp, static) =
594 .arc_name = "ip6-unicast",
595 .node_name = "l2tp-decap",
596 .runs_before = VNET_FEATURES ("vpath-input-ip6"),
599 VNET_FEATURE_INIT (ip6_vpath, static) =
601 .arc_name = "ip6-unicast",
602 .node_name = "vpath-input-ip6",
603 .runs_before = VNET_FEATURES ("ip6-vxlan-bypass"),
606 VNET_FEATURE_INIT (ip6_vxlan_bypass, static) =
608 .arc_name = "ip6-unicast",
609 .node_name = "ip6-vxlan-bypass",
610 .runs_before = VNET_FEATURES ("ip6-lookup"),
613 VNET_FEATURE_INIT (ip6_not_enabled, static) =
615 .arc_name = "ip6-unicast",
616 .node_name = "ip6-not-enabled",
617 .runs_before = VNET_FEATURES ("ip6-lookup"),
620 VNET_FEATURE_INIT (ip6_lookup, static) =
622 .arc_name = "ip6-unicast",
623 .node_name = "ip6-lookup",
624 .runs_before = 0, /*last feature*/
627 /* Built-in ip6 multicast rx feature path definition (none now) */
628 VNET_FEATURE_ARC_INIT (ip6_multicast, static) =
630 .arc_name = "ip6-multicast",
631 .start_nodes = VNET_FEATURES ("ip6-input"),
632 .last_in_arc = "ip6-mfib-forward-lookup",
633 .arc_index_ptr = &ip6_main.lookup_main.mcast_feature_arc_index,
636 VNET_FEATURE_INIT (ip6_vpath_mc, static) = {
637 .arc_name = "ip6-multicast",
638 .node_name = "vpath-input-ip6",
639 .runs_before = VNET_FEATURES ("ip6-mfib-forward-lookup"),
642 VNET_FEATURE_INIT (ip6_not_enabled_mc, static) = {
643 .arc_name = "ip6-multicast",
644 .node_name = "ip6-not-enabled",
645 .runs_before = VNET_FEATURES ("ip6-mfib-forward-lookup"),
648 VNET_FEATURE_INIT (ip6_mc_lookup, static) = {
649 .arc_name = "ip6-multicast",
650 .node_name = "ip6-mfib-forward-lookup",
651 .runs_before = 0, /* last feature */
654 /* Built-in ip4 tx feature path definition */
655 VNET_FEATURE_ARC_INIT (ip6_output, static) =
657 .arc_name = "ip6-output",
658 .start_nodes = VNET_FEATURES ("ip6-rewrite", "ip6-midchain", "ip6-dvr-dpo"),
659 .last_in_arc = "interface-output",
660 .arc_index_ptr = &ip6_main.lookup_main.output_feature_arc_index,
663 VNET_FEATURE_INIT (ip6_outacl, static) = {
664 .arc_name = "ip6-output",
665 .node_name = "ip6-outacl",
666 .runs_before = VNET_FEATURES ("ipsec6-output-feature"),
669 VNET_FEATURE_INIT (ip6_ipsec_output, static) = {
670 .arc_name = "ip6-output",
671 .node_name = "ipsec6-output-feature",
672 .runs_before = VNET_FEATURES ("interface-output"),
675 VNET_FEATURE_INIT (ip6_interface_output, static) = {
676 .arc_name = "ip6-output",
677 .node_name = "interface-output",
678 .runs_before = 0, /* not before any other features */
682 static clib_error_t *
683 ip6_sw_interface_add_del (vnet_main_t * vnm, u32 sw_if_index, u32 is_add)
685 ip6_main_t *im = &ip6_main;
687 vec_validate (im->fib_index_by_sw_if_index, sw_if_index);
688 vec_validate (im->mfib_index_by_sw_if_index, sw_if_index);
692 /* Ensure that IPv6 is disabled */
693 ip6_main_t *im6 = &ip6_main;
694 ip_lookup_main_t *lm6 = &im6->lookup_main;
695 ip_interface_address_t *ia = 0;
696 ip6_address_t *address;
697 vlib_main_t *vm = vlib_get_main ();
699 vnet_sw_interface_update_unnumbered (sw_if_index, ~0, 0);
701 foreach_ip_interface_address (lm6, ia, sw_if_index, 0,
703 address = ip_interface_address_get_address (lm6, ia);
704 ip6_add_del_interface_address(vm, sw_if_index, address, ia->address_length, 1);
707 ip6_mfib_interface_enable_disable (sw_if_index, 0);
710 vnet_feature_enable_disable ("ip6-unicast", "ip6-not-enabled", sw_if_index,
713 vnet_feature_enable_disable ("ip6-multicast", "ip6-not-enabled",
714 sw_if_index, is_add, 0, 0);
716 return /* no error */ 0;
719 VNET_SW_INTERFACE_ADD_DEL_FUNCTION (ip6_sw_interface_add_del);
721 VLIB_NODE_FN (ip6_lookup_node) (vlib_main_t * vm,
722 vlib_node_runtime_t * node,
723 vlib_frame_t * frame)
725 return ip6_lookup_inline (vm, node, frame);
728 static u8 *format_ip6_lookup_trace (u8 * s, va_list * args);
731 VLIB_REGISTER_NODE (ip6_lookup_node) =
733 .name = "ip6-lookup",
734 .vector_size = sizeof (u32),
735 .format_trace = format_ip6_lookup_trace,
736 .n_next_nodes = IP6_LOOKUP_N_NEXT,
737 .next_nodes = IP6_LOOKUP_NEXT_NODES,
741 VLIB_NODE_FN (ip6_load_balance_node) (vlib_main_t * vm,
742 vlib_node_runtime_t * node,
743 vlib_frame_t * frame)
745 vlib_combined_counter_main_t *cm = &load_balance_main.lbm_via_counters;
747 u32 thread_index = vm->thread_index;
748 ip6_main_t *im = &ip6_main;
749 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs;
750 u16 nexts[VLIB_FRAME_SIZE], *next;
752 from = vlib_frame_vector_args (frame);
753 n_left = frame->n_vectors;
756 vlib_get_buffers (vm, from, bufs, n_left);
760 const load_balance_t *lb0, *lb1;
761 const ip6_header_t *ip0, *ip1;
762 u32 lbi0, hc0, lbi1, hc1;
763 const dpo_id_t *dpo0, *dpo1;
765 /* Prefetch next iteration. */
767 vlib_prefetch_buffer_header (b[2], STORE);
768 vlib_prefetch_buffer_header (b[3], STORE);
770 CLIB_PREFETCH (b[2]->data, sizeof (ip0[0]), STORE);
771 CLIB_PREFETCH (b[3]->data, sizeof (ip0[0]), STORE);
774 ip0 = vlib_buffer_get_current (b[0]);
775 ip1 = vlib_buffer_get_current (b[1]);
776 lbi0 = vnet_buffer (b[0])->ip.adj_index[VLIB_TX];
777 lbi1 = vnet_buffer (b[1])->ip.adj_index[VLIB_TX];
779 lb0 = load_balance_get (lbi0);
780 lb1 = load_balance_get (lbi1);
783 * this node is for via FIBs we can re-use the hash value from the
784 * to node if present.
785 * We don't want to use the same hash value at each level in the recursion
786 * graph as that would lead to polarisation
790 if (PREDICT_FALSE (lb0->lb_n_buckets > 1))
792 if (PREDICT_TRUE (vnet_buffer (b[0])->ip.flow_hash))
794 hc0 = vnet_buffer (b[0])->ip.flow_hash =
795 vnet_buffer (b[0])->ip.flow_hash >> 1;
799 hc0 = vnet_buffer (b[0])->ip.flow_hash =
800 ip6_compute_flow_hash (ip0, lb0->lb_hash_config);
802 dpo0 = load_balance_get_fwd_bucket
803 (lb0, (hc0 & (lb0->lb_n_buckets_minus_1)));
807 dpo0 = load_balance_get_bucket_i (lb0, 0);
809 if (PREDICT_FALSE (lb1->lb_n_buckets > 1))
811 if (PREDICT_TRUE (vnet_buffer (b[1])->ip.flow_hash))
813 hc1 = vnet_buffer (b[1])->ip.flow_hash =
814 vnet_buffer (b[1])->ip.flow_hash >> 1;
818 hc1 = vnet_buffer (b[1])->ip.flow_hash =
819 ip6_compute_flow_hash (ip1, lb1->lb_hash_config);
821 dpo1 = load_balance_get_fwd_bucket
822 (lb1, (hc1 & (lb1->lb_n_buckets_minus_1)));
826 dpo1 = load_balance_get_bucket_i (lb1, 0);
829 next[0] = dpo0->dpoi_next_node;
830 next[1] = dpo1->dpoi_next_node;
832 /* Only process the HBH Option Header if explicitly configured to do so */
833 if (PREDICT_FALSE (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
835 next[0] = (dpo_is_adj (dpo0) && im->hbh_enabled) ?
836 (ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next[0];
838 /* Only process the HBH Option Header if explicitly configured to do so */
839 if (PREDICT_FALSE (ip1->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
841 next[1] = (dpo_is_adj (dpo1) && im->hbh_enabled) ?
842 (ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next[1];
845 vnet_buffer (b[0])->ip.adj_index[VLIB_TX] = dpo0->dpoi_index;
846 vnet_buffer (b[1])->ip.adj_index[VLIB_TX] = dpo1->dpoi_index;
848 vlib_increment_combined_counter
849 (cm, thread_index, lbi0, 1, vlib_buffer_length_in_chain (vm, b[0]));
850 vlib_increment_combined_counter
851 (cm, thread_index, lbi1, 1, vlib_buffer_length_in_chain (vm, b[1]));
860 const load_balance_t *lb0;
861 const ip6_header_t *ip0;
862 const dpo_id_t *dpo0;
865 ip0 = vlib_buffer_get_current (b[0]);
866 lbi0 = vnet_buffer (b[0])->ip.adj_index[VLIB_TX];
868 lb0 = load_balance_get (lbi0);
871 if (PREDICT_FALSE (lb0->lb_n_buckets > 1))
873 if (PREDICT_TRUE (vnet_buffer (b[0])->ip.flow_hash))
875 hc0 = vnet_buffer (b[0])->ip.flow_hash =
876 vnet_buffer (b[0])->ip.flow_hash >> 1;
880 hc0 = vnet_buffer (b[0])->ip.flow_hash =
881 ip6_compute_flow_hash (ip0, lb0->lb_hash_config);
883 dpo0 = load_balance_get_fwd_bucket
884 (lb0, (hc0 & (lb0->lb_n_buckets_minus_1)));
888 dpo0 = load_balance_get_bucket_i (lb0, 0);
891 next[0] = dpo0->dpoi_next_node;
892 vnet_buffer (b[0])->ip.adj_index[VLIB_TX] = dpo0->dpoi_index;
894 /* Only process the HBH Option Header if explicitly configured to do so */
895 if (PREDICT_FALSE (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
897 next[0] = (dpo_is_adj (dpo0) && im->hbh_enabled) ?
898 (ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next[0];
901 vlib_increment_combined_counter
902 (cm, thread_index, lbi0, 1, vlib_buffer_length_in_chain (vm, b[0]));
909 vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors);
911 if (node->flags & VLIB_NODE_FLAG_TRACE)
912 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
914 return frame->n_vectors;
918 VLIB_REGISTER_NODE (ip6_load_balance_node) =
920 .name = "ip6-load-balance",
921 .vector_size = sizeof (u32),
922 .sibling_of = "ip6-lookup",
923 .format_trace = format_ip6_lookup_trace,
929 /* Adjacency taken. */
934 /* Packet data, possibly *after* rewrite. */
935 u8 packet_data[128 - 1 * sizeof (u32)];
937 ip6_forward_next_trace_t;
939 #ifndef CLIB_MARCH_VARIANT
941 format_ip6_forward_next_trace (u8 * s, va_list * args)
943 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
944 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
945 ip6_forward_next_trace_t *t = va_arg (*args, ip6_forward_next_trace_t *);
946 u32 indent = format_get_indent (s);
948 s = format (s, "%U%U",
949 format_white_space, indent,
950 format_ip6_header, t->packet_data, sizeof (t->packet_data));
956 format_ip6_lookup_trace (u8 * s, va_list * args)
958 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
959 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
960 ip6_forward_next_trace_t *t = va_arg (*args, ip6_forward_next_trace_t *);
961 u32 indent = format_get_indent (s);
963 s = format (s, "fib %d dpo-idx %d flow hash: 0x%08x",
964 t->fib_index, t->adj_index, t->flow_hash);
965 s = format (s, "\n%U%U",
966 format_white_space, indent,
967 format_ip6_header, t->packet_data, sizeof (t->packet_data));
973 format_ip6_rewrite_trace (u8 * s, va_list * args)
975 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
976 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
977 ip6_forward_next_trace_t *t = va_arg (*args, ip6_forward_next_trace_t *);
978 u32 indent = format_get_indent (s);
980 s = format (s, "tx_sw_if_index %d adj-idx %d : %U flow hash: 0x%08x",
981 t->fib_index, t->adj_index, format_ip_adjacency,
982 t->adj_index, FORMAT_IP_ADJACENCY_NONE, t->flow_hash);
983 s = format (s, "\n%U%U",
984 format_white_space, indent,
985 format_ip_adjacency_packet_data,
986 t->packet_data, sizeof (t->packet_data));
990 /* Common trace function for all ip6-forward next nodes. */
991 #ifndef CLIB_MARCH_VARIANT
993 ip6_forward_next_trace (vlib_main_t * vm,
994 vlib_node_runtime_t * node,
995 vlib_frame_t * frame, vlib_rx_or_tx_t which_adj_index)
998 ip6_main_t *im = &ip6_main;
1000 n_left = frame->n_vectors;
1001 from = vlib_frame_vector_args (frame);
1006 vlib_buffer_t *b0, *b1;
1007 ip6_forward_next_trace_t *t0, *t1;
1009 /* Prefetch next iteration. */
1010 vlib_prefetch_buffer_with_index (vm, from[2], LOAD);
1011 vlib_prefetch_buffer_with_index (vm, from[3], LOAD);
1016 b0 = vlib_get_buffer (vm, bi0);
1017 b1 = vlib_get_buffer (vm, bi1);
1019 if (b0->flags & VLIB_BUFFER_IS_TRACED)
1021 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
1022 t0->adj_index = vnet_buffer (b0)->ip.adj_index[which_adj_index];
1023 t0->flow_hash = vnet_buffer (b0)->ip.flow_hash;
1025 (vnet_buffer (b0)->sw_if_index[VLIB_TX] !=
1026 (u32) ~ 0) ? vnet_buffer (b0)->sw_if_index[VLIB_TX] :
1027 vec_elt (im->fib_index_by_sw_if_index,
1028 vnet_buffer (b0)->sw_if_index[VLIB_RX]);
1030 clib_memcpy_fast (t0->packet_data,
1031 vlib_buffer_get_current (b0),
1032 sizeof (t0->packet_data));
1034 if (b1->flags & VLIB_BUFFER_IS_TRACED)
1036 t1 = vlib_add_trace (vm, node, b1, sizeof (t1[0]));
1037 t1->adj_index = vnet_buffer (b1)->ip.adj_index[which_adj_index];
1038 t1->flow_hash = vnet_buffer (b1)->ip.flow_hash;
1040 (vnet_buffer (b1)->sw_if_index[VLIB_TX] !=
1041 (u32) ~ 0) ? vnet_buffer (b1)->sw_if_index[VLIB_TX] :
1042 vec_elt (im->fib_index_by_sw_if_index,
1043 vnet_buffer (b1)->sw_if_index[VLIB_RX]);
1045 clib_memcpy_fast (t1->packet_data,
1046 vlib_buffer_get_current (b1),
1047 sizeof (t1->packet_data));
1057 ip6_forward_next_trace_t *t0;
1061 b0 = vlib_get_buffer (vm, bi0);
1063 if (b0->flags & VLIB_BUFFER_IS_TRACED)
1065 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
1066 t0->adj_index = vnet_buffer (b0)->ip.adj_index[which_adj_index];
1067 t0->flow_hash = vnet_buffer (b0)->ip.flow_hash;
1069 (vnet_buffer (b0)->sw_if_index[VLIB_TX] !=
1070 (u32) ~ 0) ? vnet_buffer (b0)->sw_if_index[VLIB_TX] :
1071 vec_elt (im->fib_index_by_sw_if_index,
1072 vnet_buffer (b0)->sw_if_index[VLIB_RX]);
1074 clib_memcpy_fast (t0->packet_data,
1075 vlib_buffer_get_current (b0),
1076 sizeof (t0->packet_data));
1083 /* Compute TCP/UDP/ICMP6 checksum in software. */
1085 ip6_tcp_udp_icmp_compute_checksum (vlib_main_t * vm, vlib_buffer_t * p0,
1086 ip6_header_t * ip0, int *bogus_lengthp)
1089 u16 payload_length, payload_length_host_byte_order;
1091 u32 headers_size = sizeof (ip0[0]);
1092 u8 *data_this_buffer;
1093 u8 next_hdr = ip0->protocol;
1095 ASSERT (bogus_lengthp);
1098 payload_length_host_byte_order = clib_net_to_host_u16 (ip0->payload_length);
1099 data_this_buffer = (u8 *) (ip0 + 1);
1100 payload_length = ip0->payload_length;
1102 /* some icmp packets may come with a "router alert" hop-by-hop extension header (e.g., mldv2 packets)
1103 * or UDP-Ping packets */
1104 if (PREDICT_FALSE (next_hdr == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
1107 ip6_hop_by_hop_ext_t *ext_hdr =
1108 (ip6_hop_by_hop_ext_t *) data_this_buffer;
1110 /* validate really icmp6 next */
1111 ASSERT ((ext_hdr->next_hdr == IP_PROTOCOL_ICMP6)
1112 || (ext_hdr->next_hdr == IP_PROTOCOL_UDP));
1114 skip_bytes = 8 * (1 + ext_hdr->n_data_u64s);
1115 data_this_buffer = (void *) ((u8 *) data_this_buffer + skip_bytes);
1117 payload_length_host_byte_order -= skip_bytes;
1118 headers_size += skip_bytes;
1120 /* pseudo-header adjustments:
1121 * exclude ext header bytes from payload length
1122 * use payload IP proto rather than ext header IP proto
1124 payload_length = clib_host_to_net_u16 (payload_length_host_byte_order);
1125 next_hdr = ext_hdr->next_hdr;
1128 /* Initialize checksum with ip pseudo-header. */
1129 sum0 = payload_length + clib_host_to_net_u16 (next_hdr);
1131 for (i = 0; i < ARRAY_LEN (ip0->src_address.as_uword); i++)
1133 sum0 = ip_csum_with_carry
1134 (sum0, clib_mem_unaligned (&ip0->src_address.as_uword[i], uword));
1135 sum0 = ip_csum_with_carry
1136 (sum0, clib_mem_unaligned (&ip0->dst_address.as_uword[i], uword));
1140 return ip_calculate_l4_checksum (vm, p0, sum0,
1141 payload_length_host_byte_order,
1142 (u8 *) ip0, headers_size, NULL);
1144 return ip_calculate_l4_checksum (vm, 0, sum0,
1145 payload_length_host_byte_order, NULL, 0,
1150 ip6_tcp_udp_icmp_validate_checksum (vlib_main_t * vm, vlib_buffer_t * p0)
1152 ip6_header_t *ip0 = vlib_buffer_get_current (p0);
1157 /* some icmp packets may come with a "router alert" hop-by-hop extension header (e.g., mldv2 packets) */
1158 ASSERT (ip0->protocol == IP_PROTOCOL_TCP
1159 || ip0->protocol == IP_PROTOCOL_ICMP6
1160 || ip0->protocol == IP_PROTOCOL_UDP
1161 || ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS);
1163 udp0 = (void *) (ip0 + 1);
1164 if (ip0->protocol == IP_PROTOCOL_UDP && udp0->checksum == 0)
1166 p0->flags |= (VNET_BUFFER_F_L4_CHECKSUM_COMPUTED
1167 | VNET_BUFFER_F_L4_CHECKSUM_CORRECT);
1171 sum16 = ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip0, &bogus_length);
1173 p0->flags |= (VNET_BUFFER_F_L4_CHECKSUM_COMPUTED
1174 | ((sum16 == 0) << VNET_BUFFER_F_LOG2_L4_CHECKSUM_CORRECT));
1181 * @brief returns number of links on which src is reachable.
1184 ip6_urpf_loose_check (ip6_main_t * im, vlib_buffer_t * b, ip6_header_t * i)
1186 const load_balance_t *lb0;
1190 fib_index = vec_elt (im->fib_index_by_sw_if_index,
1191 vnet_buffer (b)->sw_if_index[VLIB_RX]);
1193 (vnet_buffer (b)->sw_if_index[VLIB_TX] == (u32) ~ 0) ?
1194 fib_index : vnet_buffer (b)->sw_if_index[VLIB_TX];
1196 lbi = ip6_fib_table_fwding_lookup (fib_index, &i->src_address);
1197 lb0 = load_balance_get (lbi);
1199 return (fib_urpf_check_size (lb0->lb_urpf));
1203 ip6_next_proto_is_tcp_udp (vlib_buffer_t * p0, ip6_header_t * ip0,
1207 proto0 = ip6_locate_header (p0, ip0, IP_PROTOCOL_UDP, udp_offset0);
1208 if (proto0 != IP_PROTOCOL_UDP)
1210 proto0 = ip6_locate_header (p0, ip0, IP_PROTOCOL_TCP, udp_offset0);
1211 proto0 = (proto0 == IP_PROTOCOL_TCP) ? proto0 : 0;
1217 VNET_FEATURE_ARC_INIT (ip6_local) =
1219 .arc_name = "ip6-local",
1220 .start_nodes = VNET_FEATURES ("ip6-local"),
1224 static_always_inline u8
1225 ip6_tcp_udp_icmp_bad_length (vlib_main_t * vm, vlib_buffer_t * p0)
1228 u16 payload_length_host_byte_order;
1229 u32 n_this_buffer, n_bytes_left;
1230 ip6_header_t *ip0 = vlib_buffer_get_current (p0);
1231 u32 headers_size = sizeof (ip0[0]);
1232 u8 *data_this_buffer;
1235 data_this_buffer = (u8 *) (ip0 + 1);
1237 ip6_hop_by_hop_ext_t *ext_hdr = (ip6_hop_by_hop_ext_t *) data_this_buffer;
1239 /* validate really icmp6 next */
1241 if (!(ext_hdr->next_hdr == IP_PROTOCOL_ICMP6)
1242 || (ext_hdr->next_hdr == IP_PROTOCOL_UDP))
1246 payload_length_host_byte_order = clib_net_to_host_u16 (ip0->payload_length);
1247 n_bytes_left = n_this_buffer = payload_length_host_byte_order;
1250 u32 n_ip_bytes_this_buffer =
1251 p0->current_length - (((u8 *) ip0 - p0->data) - p0->current_data);
1252 if (n_this_buffer + headers_size > n_ip_bytes_this_buffer)
1254 n_this_buffer = p0->current_length > headers_size ?
1255 n_ip_bytes_this_buffer - headers_size : 0;
1258 n_bytes_left -= n_this_buffer;
1259 n_bytes_left -= p0->total_length_not_including_first_buffer;
1261 if (n_bytes_left == 0)
1269 ip6_local_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
1270 vlib_frame_t * frame, int head_of_feature_arc)
1272 ip6_main_t *im = &ip6_main;
1273 ip_lookup_main_t *lm = &im->lookup_main;
1274 u32 *from, n_left_from;
1275 vlib_node_runtime_t *error_node =
1276 vlib_node_get_runtime (vm, ip6_input_node.index);
1277 u8 arc_index = vnet_feat_arc_ip6_local.feature_arc_index;
1278 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
1279 u16 nexts[VLIB_FRAME_SIZE], *next;
1281 from = vlib_frame_vector_args (frame);
1282 n_left_from = frame->n_vectors;
1284 if (node->flags & VLIB_NODE_FLAG_TRACE)
1285 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
1287 vlib_get_buffers (vm, from, bufs, n_left_from);
1291 while (n_left_from > 2)
1293 /* Prefetch next iteration. */
1294 if (n_left_from >= 6)
1296 vlib_prefetch_buffer_header (b[4], STORE);
1297 vlib_prefetch_buffer_header (b[5], STORE);
1298 vlib_prefetch_buffer_data (b[2], LOAD);
1299 vlib_prefetch_buffer_data (b[3], LOAD);
1303 error[0] = IP6_ERROR_UNKNOWN_PROTOCOL;
1304 error[1] = IP6_ERROR_UNKNOWN_PROTOCOL;
1306 ip6_header_t *ip[2];
1307 ip[0] = vlib_buffer_get_current (b[0]);
1308 ip[1] = vlib_buffer_get_current (b[1]);
1310 if (head_of_feature_arc)
1312 vnet_buffer (b[0])->l3_hdr_offset = b[0]->current_data;
1313 vnet_buffer (b[1])->l3_hdr_offset = b[1]->current_data;
1316 type[0] = lm->builtin_protocol_by_ip_protocol[ip[0]->protocol];
1317 type[1] = lm->builtin_protocol_by_ip_protocol[ip[1]->protocol];
1320 flags[0] = b[0]->flags;
1321 flags[1] = b[1]->flags;
1323 u32 good_l4_csum[2];
1325 flags[0] & (VNET_BUFFER_F_L4_CHECKSUM_CORRECT |
1326 VNET_BUFFER_F_OFFLOAD_TCP_CKSUM |
1327 VNET_BUFFER_F_OFFLOAD_UDP_CKSUM);
1329 flags[1] & (VNET_BUFFER_F_L4_CHECKSUM_CORRECT |
1330 VNET_BUFFER_F_OFFLOAD_TCP_CKSUM |
1331 VNET_BUFFER_F_OFFLOAD_UDP_CKSUM);
1333 u32 udp_offset[2] = { };
1336 ip6_next_proto_is_tcp_udp (b[0], ip[0], &udp_offset[0]);
1338 ip6_next_proto_is_tcp_udp (b[1], ip[1], &udp_offset[1]);
1339 i16 len_diff[2] = { 0 };
1340 if (PREDICT_TRUE (is_tcp_udp[0]))
1343 (udp_header_t *) ((u8 *) ip[0] + udp_offset[0]);
1344 good_l4_csum[0] |= type[0] == IP_BUILTIN_PROTOCOL_UDP
1345 && udp->checksum == 0;
1346 /* optimistically verify UDP length. */
1347 u16 ip_len, udp_len;
1348 ip_len = clib_net_to_host_u16 (ip[0]->payload_length);
1349 udp_len = clib_net_to_host_u16 (udp->length);
1350 len_diff[0] = ip_len - udp_len;
1352 if (PREDICT_TRUE (is_tcp_udp[1]))
1355 (udp_header_t *) ((u8 *) ip[1] + udp_offset[1]);
1356 good_l4_csum[1] |= type[1] == IP_BUILTIN_PROTOCOL_UDP
1357 && udp->checksum == 0;
1358 /* optimistically verify UDP length. */
1359 u16 ip_len, udp_len;
1360 ip_len = clib_net_to_host_u16 (ip[1]->payload_length);
1361 udp_len = clib_net_to_host_u16 (udp->length);
1362 len_diff[1] = ip_len - udp_len;
1365 good_l4_csum[0] |= type[0] == IP_BUILTIN_PROTOCOL_UNKNOWN;
1366 good_l4_csum[1] |= type[1] == IP_BUILTIN_PROTOCOL_UNKNOWN;
1368 len_diff[0] = type[0] == IP_BUILTIN_PROTOCOL_UDP ? len_diff[0] : 0;
1369 len_diff[1] = type[1] == IP_BUILTIN_PROTOCOL_UDP ? len_diff[1] : 0;
1372 need_csum[0] = type[0] != IP_BUILTIN_PROTOCOL_UNKNOWN
1374 && !(flags[0] & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED);
1375 need_csum[1] = type[1] != IP_BUILTIN_PROTOCOL_UNKNOWN
1377 && !(flags[1] & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED);
1378 if (PREDICT_FALSE (need_csum[0]))
1380 flags[0] = ip6_tcp_udp_icmp_validate_checksum (vm, b[0]);
1381 good_l4_csum[0] = flags[0] & VNET_BUFFER_F_L4_CHECKSUM_CORRECT;
1382 error[0] = IP6_ERROR_UNKNOWN_PROTOCOL;
1386 if (ip6_tcp_udp_icmp_bad_length (vm, b[0]))
1387 error[0] = IP6_ERROR_BAD_LENGTH;
1389 if (PREDICT_FALSE (need_csum[1]))
1391 flags[1] = ip6_tcp_udp_icmp_validate_checksum (vm, b[1]);
1392 good_l4_csum[1] = flags[1] & VNET_BUFFER_F_L4_CHECKSUM_CORRECT;
1393 error[1] = IP6_ERROR_UNKNOWN_PROTOCOL;
1397 if (ip6_tcp_udp_icmp_bad_length (vm, b[1]))
1398 error[1] = IP6_ERROR_BAD_LENGTH;
1402 error[0] = len_diff[0] < 0 ? IP6_ERROR_UDP_LENGTH : error[0];
1404 error[1] = len_diff[1] < 0 ? IP6_ERROR_UDP_LENGTH : error[1];
1406 STATIC_ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_UDP ==
1407 IP6_ERROR_UDP_CHECKSUM,
1408 "Wrong IP6 errors constants");
1409 STATIC_ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_ICMP ==
1410 IP6_ERROR_ICMP_CHECKSUM,
1411 "Wrong IP6 errors constants");
1414 !good_l4_csum[0] ? IP6_ERROR_UDP_CHECKSUM + type[0] : error[0];
1416 !good_l4_csum[1] ? IP6_ERROR_UDP_CHECKSUM + type[1] : error[1];
1418 /* Drop packets from unroutable hosts. */
1419 /* If this is a neighbor solicitation (ICMP), skip source RPF check */
1421 unroutable[0] = error[0] == IP6_ERROR_UNKNOWN_PROTOCOL
1422 && type[0] != IP_BUILTIN_PROTOCOL_ICMP
1423 && !ip6_address_is_link_local_unicast (&ip[0]->src_address);
1424 unroutable[1] = error[1] == IP6_ERROR_UNKNOWN_PROTOCOL
1425 && type[1] != IP_BUILTIN_PROTOCOL_ICMP
1426 && !ip6_address_is_link_local_unicast (&ip[1]->src_address);
1427 if (PREDICT_FALSE (unroutable[0]))
1430 !ip6_urpf_loose_check (im, b[0],
1431 ip[0]) ? IP6_ERROR_SRC_LOOKUP_MISS
1434 if (PREDICT_FALSE (unroutable[1]))
1437 !ip6_urpf_loose_check (im, b[1],
1438 ip[1]) ? IP6_ERROR_SRC_LOOKUP_MISS
1442 vnet_buffer (b[0])->ip.fib_index =
1443 vnet_buffer (b[0])->sw_if_index[VLIB_TX] != ~0 ?
1444 vnet_buffer (b[0])->sw_if_index[VLIB_TX] :
1445 vnet_buffer (b[0])->ip.fib_index;
1446 vnet_buffer (b[1])->ip.fib_index =
1447 vnet_buffer (b[1])->sw_if_index[VLIB_TX] != ~0 ?
1448 vnet_buffer (b[1])->sw_if_index[VLIB_TX] :
1449 vnet_buffer (b[1])->ip.fib_index;
1450 } /* head_of_feature_arc */
1452 next[0] = lm->local_next_by_ip_protocol[ip[0]->protocol];
1454 error[0] != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next[0];
1455 next[1] = lm->local_next_by_ip_protocol[ip[1]->protocol];
1457 error[1] != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next[1];
1459 b[0]->error = error_node->errors[0];
1460 b[1]->error = error_node->errors[1];
1462 if (head_of_feature_arc)
1465 ip6_unknown[0] = error[0] == (u8) IP6_ERROR_UNKNOWN_PROTOCOL;
1466 ip6_unknown[1] = error[1] == (u8) IP6_ERROR_UNKNOWN_PROTOCOL;
1467 if (PREDICT_TRUE (ip6_unknown[0]))
1469 u32 next32 = next[0];
1470 vnet_feature_arc_start (arc_index,
1471 vnet_buffer (b[0])->sw_if_index
1472 [VLIB_RX], &next32, b[0]);
1475 if (PREDICT_TRUE (ip6_unknown[1]))
1477 u32 next32 = next[1];
1478 vnet_feature_arc_start (arc_index,
1479 vnet_buffer (b[1])->sw_if_index
1480 [VLIB_RX], &next32, b[1]);
1494 error = IP6_ERROR_UNKNOWN_PROTOCOL;
1497 ip = vlib_buffer_get_current (b[0]);
1499 if (head_of_feature_arc)
1501 vnet_buffer (b[0])->l3_hdr_offset = b[0]->current_data;
1502 u8 type = lm->builtin_protocol_by_ip_protocol[ip->protocol];
1504 u32 flags = b[0]->flags;
1506 flags & (VNET_BUFFER_F_L4_CHECKSUM_CORRECT |
1507 VNET_BUFFER_F_OFFLOAD_TCP_CKSUM |
1508 VNET_BUFFER_F_OFFLOAD_UDP_CKSUM);
1512 u8 is_tcp_udp = ip6_next_proto_is_tcp_udp (b[0], ip, &udp_offset);
1513 if (PREDICT_TRUE (is_tcp_udp))
1515 udp_header_t *udp = (udp_header_t *) ((u8 *) ip + udp_offset);
1516 /* Don't verify UDP checksum for packets with explicit zero checksum. */
1517 good_l4_csum |= type == IP_BUILTIN_PROTOCOL_UDP
1518 && udp->checksum == 0;
1519 /* optimistically verify UDP length. */
1520 u16 ip_len, udp_len;
1521 ip_len = clib_net_to_host_u16 (ip->payload_length);
1522 udp_len = clib_net_to_host_u16 (udp->length);
1523 len_diff = ip_len - udp_len;
1526 good_l4_csum |= type == IP_BUILTIN_PROTOCOL_UNKNOWN;
1527 len_diff = type == IP_BUILTIN_PROTOCOL_UDP ? len_diff : 0;
1529 u8 need_csum = type != IP_BUILTIN_PROTOCOL_UNKNOWN && !good_l4_csum
1530 && !(flags & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED);
1531 if (PREDICT_FALSE (need_csum))
1533 flags = ip6_tcp_udp_icmp_validate_checksum (vm, b[0]);
1534 good_l4_csum = flags & VNET_BUFFER_F_L4_CHECKSUM_CORRECT;
1535 error = IP6_ERROR_UNKNOWN_PROTOCOL;
1539 if (ip6_tcp_udp_icmp_bad_length (vm, b[0]))
1540 error = IP6_ERROR_BAD_LENGTH;
1545 error = len_diff < 0 ? IP6_ERROR_UDP_LENGTH : error;
1547 STATIC_ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_UDP ==
1548 IP6_ERROR_UDP_CHECKSUM,
1549 "Wrong IP6 errors constants");
1550 STATIC_ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_ICMP ==
1551 IP6_ERROR_ICMP_CHECKSUM,
1552 "Wrong IP6 errors constants");
1554 error = !good_l4_csum ? IP6_ERROR_UDP_CHECKSUM + type : error;
1556 /* Drop packets from unroutable hosts. */
1557 /* If this is a neighbor solicitation (ICMP), skip source RPF check */
1558 u8 unroutable = error == IP6_ERROR_UNKNOWN_PROTOCOL
1559 && type != IP_BUILTIN_PROTOCOL_ICMP
1560 && !ip6_address_is_link_local_unicast (&ip->src_address);
1561 if (PREDICT_FALSE (unroutable))
1564 !ip6_urpf_loose_check (im, b[0],
1565 ip) ? IP6_ERROR_SRC_LOOKUP_MISS :
1569 vnet_buffer (b[0])->ip.fib_index =
1570 vnet_buffer (b[0])->sw_if_index[VLIB_TX] != ~0 ?
1571 vnet_buffer (b[0])->sw_if_index[VLIB_TX] :
1572 vnet_buffer (b[0])->ip.fib_index;
1573 } /* head_of_feature_arc */
1575 next[0] = lm->local_next_by_ip_protocol[ip->protocol];
1577 error != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next[0];
1579 b[0]->error = error_node->errors[0];
1581 if (head_of_feature_arc)
1583 if (PREDICT_TRUE (error == (u8) IP6_ERROR_UNKNOWN_PROTOCOL))
1585 u32 next32 = next[0];
1586 vnet_feature_arc_start (arc_index,
1587 vnet_buffer (b[0])->sw_if_index
1588 [VLIB_RX], &next32, b[0]);
1599 vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors);
1600 return frame->n_vectors;
1603 VLIB_NODE_FN (ip6_local_node) (vlib_main_t * vm, vlib_node_runtime_t * node,
1604 vlib_frame_t * frame)
1606 return ip6_local_inline (vm, node, frame, 1 /* head of feature arc */ );
1610 VLIB_REGISTER_NODE (ip6_local_node) =
1612 .name = "ip6-local",
1613 .vector_size = sizeof (u32),
1614 .format_trace = format_ip6_forward_next_trace,
1615 .n_next_nodes = IP_LOCAL_N_NEXT,
1618 [IP_LOCAL_NEXT_DROP] = "ip6-drop",
1619 [IP_LOCAL_NEXT_PUNT] = "ip6-punt",
1620 [IP_LOCAL_NEXT_UDP_LOOKUP] = "ip6-udp-lookup",
1621 [IP_LOCAL_NEXT_ICMP] = "ip6-icmp-input",
1622 [IP_LOCAL_NEXT_REASSEMBLY] = "ip6-full-reassembly",
1627 VLIB_NODE_FN (ip6_local_end_of_arc_node) (vlib_main_t * vm,
1628 vlib_node_runtime_t * node,
1629 vlib_frame_t * frame)
1631 return ip6_local_inline (vm, node, frame, 0 /* head of feature arc */ );
1635 VLIB_REGISTER_NODE (ip6_local_end_of_arc_node) = {
1636 .name = "ip6-local-end-of-arc",
1637 .vector_size = sizeof (u32),
1639 .format_trace = format_ip6_forward_next_trace,
1640 .sibling_of = "ip6-local",
1643 VNET_FEATURE_INIT (ip6_local_end_of_arc, static) = {
1644 .arc_name = "ip6-local",
1645 .node_name = "ip6-local-end-of-arc",
1646 .runs_before = 0, /* not before any other features */
1650 #ifdef CLIB_MARCH_VARIANT
1651 extern vlib_node_registration_t ip6_local_node;
1654 ip6_register_protocol (u32 protocol, u32 node_index)
1656 vlib_main_t *vm = vlib_get_main ();
1657 ip6_main_t *im = &ip6_main;
1658 ip_lookup_main_t *lm = &im->lookup_main;
1660 ASSERT (protocol < ARRAY_LEN (lm->local_next_by_ip_protocol));
1661 lm->local_next_by_ip_protocol[protocol] =
1662 vlib_node_add_next (vm, ip6_local_node.index, node_index);
1666 ip6_unregister_protocol (u32 protocol)
1668 ip6_main_t *im = &ip6_main;
1669 ip_lookup_main_t *lm = &im->lookup_main;
1671 ASSERT (protocol < ARRAY_LEN (lm->local_next_by_ip_protocol));
1672 lm->local_next_by_ip_protocol[protocol] = IP_LOCAL_NEXT_PUNT;
1678 IP6_REWRITE_NEXT_DROP,
1679 IP6_REWRITE_NEXT_ICMP_ERROR,
1680 IP6_REWRITE_NEXT_FRAGMENT,
1681 IP6_REWRITE_N_NEXT /* Last */
1682 } ip6_rewrite_next_t;
1685 * This bits of an IPv6 address to mask to construct a multicast
1688 #define IP6_MCAST_ADDR_MASK 0xffffffff
1691 ip6_mtu_check (vlib_buffer_t * b, u16 packet_bytes,
1692 u16 adj_packet_bytes, bool is_locally_generated,
1693 u32 * next, u8 is_midchain, u32 * error)
1695 if (adj_packet_bytes >= 1280 && packet_bytes > adj_packet_bytes)
1697 if (is_locally_generated)
1699 /* IP fragmentation */
1700 ip_frag_set_vnet_buffer (b, adj_packet_bytes,
1702 IP_FRAG_NEXT_IP_REWRITE_MIDCHAIN :
1703 IP_FRAG_NEXT_IP_REWRITE), 0);
1704 *next = IP6_REWRITE_NEXT_FRAGMENT;
1705 *error = IP6_ERROR_MTU_EXCEEDED;
1709 *error = IP6_ERROR_MTU_EXCEEDED;
1710 icmp6_error_set_vnet_buffer (b, ICMP6_packet_too_big, 0,
1712 *next = IP6_REWRITE_NEXT_ICMP_ERROR;
1718 ip6_rewrite_inline_with_gso (vlib_main_t * vm,
1719 vlib_node_runtime_t * node,
1720 vlib_frame_t * frame,
1721 int do_counters, int is_midchain, int is_mcast)
1723 ip_lookup_main_t *lm = &ip6_main.lookup_main;
1724 u32 *from = vlib_frame_vector_args (frame);
1725 u32 n_left_from, n_left_to_next, *to_next, next_index;
1726 vlib_node_runtime_t *error_node =
1727 vlib_node_get_runtime (vm, ip6_input_node.index);
1729 n_left_from = frame->n_vectors;
1730 next_index = node->cached_next_index;
1731 u32 thread_index = vm->thread_index;
1733 while (n_left_from > 0)
1735 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1737 while (n_left_from >= 4 && n_left_to_next >= 2)
1739 const ip_adjacency_t *adj0, *adj1;
1740 vlib_buffer_t *p0, *p1;
1741 ip6_header_t *ip0, *ip1;
1742 u32 pi0, rw_len0, next0, error0, adj_index0;
1743 u32 pi1, rw_len1, next1, error1, adj_index1;
1744 u32 tx_sw_if_index0, tx_sw_if_index1;
1745 bool is_locally_originated0, is_locally_originated1;
1747 /* Prefetch next iteration. */
1749 vlib_buffer_t *p2, *p3;
1751 p2 = vlib_get_buffer (vm, from[2]);
1752 p3 = vlib_get_buffer (vm, from[3]);
1754 vlib_prefetch_buffer_header (p2, LOAD);
1755 vlib_prefetch_buffer_header (p3, LOAD);
1757 CLIB_PREFETCH (p2->pre_data, 32, STORE);
1758 CLIB_PREFETCH (p3->pre_data, 32, STORE);
1760 CLIB_PREFETCH (p2->data, sizeof (ip0[0]), STORE);
1761 CLIB_PREFETCH (p3->data, sizeof (ip0[0]), STORE);
1764 pi0 = to_next[0] = from[0];
1765 pi1 = to_next[1] = from[1];
1770 n_left_to_next -= 2;
1772 p0 = vlib_get_buffer (vm, pi0);
1773 p1 = vlib_get_buffer (vm, pi1);
1775 adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
1776 adj_index1 = vnet_buffer (p1)->ip.adj_index[VLIB_TX];
1778 ip0 = vlib_buffer_get_current (p0);
1779 ip1 = vlib_buffer_get_current (p1);
1781 error0 = error1 = IP6_ERROR_NONE;
1782 next0 = next1 = IP6_REWRITE_NEXT_DROP;
1784 is_locally_originated0 =
1785 p0->flags & VNET_BUFFER_F_LOCALLY_ORIGINATED;
1786 if (PREDICT_TRUE (!is_locally_originated0))
1788 i32 hop_limit0 = ip0->hop_limit;
1790 /* Input node should have reject packets with hop limit 0. */
1791 ASSERT (ip0->hop_limit > 0);
1795 ip0->hop_limit = hop_limit0;
1798 * If the hop count drops below 1 when forwarding, generate
1801 if (PREDICT_FALSE (hop_limit0 <= 0))
1803 error0 = IP6_ERROR_TIME_EXPIRED;
1804 next0 = IP6_REWRITE_NEXT_ICMP_ERROR;
1805 vnet_buffer (p0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
1806 icmp6_error_set_vnet_buffer (p0, ICMP6_time_exceeded,
1807 ICMP6_time_exceeded_ttl_exceeded_in_transit,
1812 is_locally_originated1 =
1813 p1->flags & VNET_BUFFER_F_LOCALLY_ORIGINATED;
1814 if (PREDICT_TRUE (!is_locally_originated1))
1816 i32 hop_limit1 = ip1->hop_limit;
1818 /* Input node should have reject packets with hop limit 0. */
1819 ASSERT (ip1->hop_limit > 0);
1823 ip1->hop_limit = hop_limit1;
1826 * If the hop count drops below 1 when forwarding, generate
1829 if (PREDICT_FALSE (hop_limit1 <= 0))
1831 error1 = IP6_ERROR_TIME_EXPIRED;
1832 next1 = IP6_REWRITE_NEXT_ICMP_ERROR;
1833 vnet_buffer (p1)->sw_if_index[VLIB_TX] = (u32) ~ 0;
1834 icmp6_error_set_vnet_buffer (p1, ICMP6_time_exceeded,
1835 ICMP6_time_exceeded_ttl_exceeded_in_transit,
1840 adj0 = adj_get (adj_index0);
1841 adj1 = adj_get (adj_index1);
1843 rw_len0 = adj0[0].rewrite_header.data_bytes;
1844 rw_len1 = adj1[0].rewrite_header.data_bytes;
1845 vnet_buffer (p0)->ip.save_rewrite_length = rw_len0;
1846 vnet_buffer (p1)->ip.save_rewrite_length = rw_len1;
1850 vlib_increment_combined_counter
1851 (&adjacency_counters,
1852 thread_index, adj_index0, 1,
1853 vlib_buffer_length_in_chain (vm, p0) + rw_len0);
1854 vlib_increment_combined_counter
1855 (&adjacency_counters,
1856 thread_index, adj_index1, 1,
1857 vlib_buffer_length_in_chain (vm, p1) + rw_len1);
1860 /* Check MTU of outgoing interface. */
1862 clib_net_to_host_u16 (ip0->payload_length) +
1863 sizeof (ip6_header_t);
1865 clib_net_to_host_u16 (ip1->payload_length) +
1866 sizeof (ip6_header_t);
1867 if (p0->flags & VNET_BUFFER_F_GSO)
1868 ip0_len = gso_mtu_sz (p0);
1869 if (p1->flags & VNET_BUFFER_F_GSO)
1870 ip1_len = gso_mtu_sz (p1);
1874 ip6_mtu_check (p0, ip0_len,
1875 adj0[0].rewrite_header.max_l3_packet_bytes,
1876 is_locally_originated0, &next0, is_midchain,
1878 ip6_mtu_check (p1, ip1_len,
1879 adj1[0].rewrite_header.max_l3_packet_bytes,
1880 is_locally_originated1, &next1, is_midchain,
1883 /* Don't adjust the buffer for hop count issue; icmp-error node
1884 * wants to see the IP header */
1885 if (PREDICT_TRUE (error0 == IP6_ERROR_NONE))
1887 p0->current_data -= rw_len0;
1888 p0->current_length += rw_len0;
1890 tx_sw_if_index0 = adj0[0].rewrite_header.sw_if_index;
1891 vnet_buffer (p0)->sw_if_index[VLIB_TX] = tx_sw_if_index0;
1892 next0 = adj0[0].rewrite_header.next_index;
1895 (adj0[0].rewrite_header.flags & VNET_REWRITE_HAS_FEATURES))
1896 vnet_feature_arc_start_w_cfg_index
1897 (lm->output_feature_arc_index, tx_sw_if_index0, &next0, p0,
1898 adj0->ia_cfg_index);
1902 p0->error = error_node->errors[error0];
1904 if (PREDICT_TRUE (error1 == IP6_ERROR_NONE))
1906 p1->current_data -= rw_len1;
1907 p1->current_length += rw_len1;
1909 tx_sw_if_index1 = adj1[0].rewrite_header.sw_if_index;
1910 vnet_buffer (p1)->sw_if_index[VLIB_TX] = tx_sw_if_index1;
1911 next1 = adj1[0].rewrite_header.next_index;
1914 (adj1[0].rewrite_header.flags & VNET_REWRITE_HAS_FEATURES))
1915 vnet_feature_arc_start_w_cfg_index
1916 (lm->output_feature_arc_index, tx_sw_if_index1, &next1, p1,
1917 adj1->ia_cfg_index);
1921 p1->error = error_node->errors[error1];
1926 /* before we paint on the next header, update the L4
1927 * checksums if required, since there's no offload on a tunnel */
1928 vnet_calc_checksums_inline (vm, p0, 0 /* is_ip4 */ ,
1931 vnet_calc_checksums_inline (vm, p1, 0 /* is_ip4 */ ,
1935 /* Guess we are only writing on ipv6 header. */
1936 vnet_rewrite_two_headers (adj0[0], adj1[0],
1937 ip0, ip1, sizeof (ip6_header_t));
1940 /* Guess we are only writing on simple Ethernet header. */
1941 vnet_rewrite_two_headers (adj0[0], adj1[0],
1942 ip0, ip1, sizeof (ethernet_header_t));
1946 if (adj0->sub_type.midchain.fixup_func)
1947 adj0->sub_type.midchain.fixup_func
1948 (vm, adj0, p0, adj0->sub_type.midchain.fixup_data);
1949 if (adj1->sub_type.midchain.fixup_func)
1950 adj1->sub_type.midchain.fixup_func
1951 (vm, adj1, p1, adj1->sub_type.midchain.fixup_data);
1956 * copy bytes from the IP address into the MAC rewrite
1958 vnet_ip_mcast_fixup_header (IP6_MCAST_ADDR_MASK,
1960 rewrite_header.dst_mcast_offset,
1961 &ip0->dst_address.as_u32[3],
1963 vnet_ip_mcast_fixup_header (IP6_MCAST_ADDR_MASK,
1965 rewrite_header.dst_mcast_offset,
1966 &ip1->dst_address.as_u32[3],
1970 vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
1971 to_next, n_left_to_next,
1972 pi0, pi1, next0, next1);
1975 while (n_left_from > 0 && n_left_to_next > 0)
1977 ip_adjacency_t *adj0;
1981 u32 adj_index0, next0, error0;
1982 u32 tx_sw_if_index0;
1983 bool is_locally_originated0;
1985 pi0 = to_next[0] = from[0];
1987 p0 = vlib_get_buffer (vm, pi0);
1989 adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
1991 adj0 = adj_get (adj_index0);
1993 ip0 = vlib_buffer_get_current (p0);
1995 error0 = IP6_ERROR_NONE;
1996 next0 = IP6_REWRITE_NEXT_DROP;
1998 /* Check hop limit */
1999 is_locally_originated0 =
2000 p0->flags & VNET_BUFFER_F_LOCALLY_ORIGINATED;
2001 if (PREDICT_TRUE (!is_locally_originated0))
2003 i32 hop_limit0 = ip0->hop_limit;
2005 ASSERT (ip0->hop_limit > 0);
2009 ip0->hop_limit = hop_limit0;
2011 if (PREDICT_FALSE (hop_limit0 <= 0))
2014 * If the hop count drops below 1 when forwarding, generate
2017 error0 = IP6_ERROR_TIME_EXPIRED;
2018 next0 = IP6_REWRITE_NEXT_ICMP_ERROR;
2019 vnet_buffer (p0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
2020 icmp6_error_set_vnet_buffer (p0, ICMP6_time_exceeded,
2021 ICMP6_time_exceeded_ttl_exceeded_in_transit,
2028 vnet_calc_checksums_inline (vm, p0, 0 /* is_ip4 */ ,
2032 /* Guess we are only writing on ip6 header. */
2033 vnet_rewrite_one_header (adj0[0], ip0, sizeof (ip6_header_t));
2036 /* Guess we are only writing on simple Ethernet header. */
2037 vnet_rewrite_one_header (adj0[0], ip0,
2038 sizeof (ethernet_header_t));
2040 /* Update packet buffer attributes/set output interface. */
2041 rw_len0 = adj0[0].rewrite_header.data_bytes;
2042 vnet_buffer (p0)->ip.save_rewrite_length = rw_len0;
2046 vlib_increment_combined_counter
2047 (&adjacency_counters,
2048 thread_index, adj_index0, 1,
2049 vlib_buffer_length_in_chain (vm, p0) + rw_len0);
2052 /* Check MTU of outgoing interface. */
2054 clib_net_to_host_u16 (ip0->payload_length) +
2055 sizeof (ip6_header_t);
2056 if (p0->flags & VNET_BUFFER_F_GSO)
2057 ip0_len = gso_mtu_sz (p0);
2059 ip6_mtu_check (p0, ip0_len,
2060 adj0[0].rewrite_header.max_l3_packet_bytes,
2061 is_locally_originated0, &next0, is_midchain,
2064 /* Don't adjust the buffer for hop count issue; icmp-error node
2065 * wants to see the IP header */
2066 if (PREDICT_TRUE (error0 == IP6_ERROR_NONE))
2068 p0->current_data -= rw_len0;
2069 p0->current_length += rw_len0;
2071 tx_sw_if_index0 = adj0[0].rewrite_header.sw_if_index;
2073 vnet_buffer (p0)->sw_if_index[VLIB_TX] = tx_sw_if_index0;
2074 next0 = adj0[0].rewrite_header.next_index;
2077 (adj0[0].rewrite_header.flags & VNET_REWRITE_HAS_FEATURES))
2078 vnet_feature_arc_start_w_cfg_index
2079 (lm->output_feature_arc_index, tx_sw_if_index0, &next0, p0,
2080 adj0->ia_cfg_index);
2084 p0->error = error_node->errors[error0];
2089 if (adj0->sub_type.midchain.fixup_func)
2090 adj0->sub_type.midchain.fixup_func
2091 (vm, adj0, p0, adj0->sub_type.midchain.fixup_data);
2095 vnet_ip_mcast_fixup_header (IP6_MCAST_ADDR_MASK,
2097 rewrite_header.dst_mcast_offset,
2098 &ip0->dst_address.as_u32[3],
2105 n_left_to_next -= 1;
2107 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
2108 to_next, n_left_to_next,
2112 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2115 /* Need to do trace after rewrites to pick up new packet data. */
2116 if (node->flags & VLIB_NODE_FLAG_TRACE)
2117 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
2119 return frame->n_vectors;
2123 ip6_rewrite_inline (vlib_main_t * vm,
2124 vlib_node_runtime_t * node,
2125 vlib_frame_t * frame,
2126 int do_counters, int is_midchain, int is_mcast)
2128 return ip6_rewrite_inline_with_gso (vm, node, frame, do_counters,
2129 is_midchain, is_mcast);
2132 VLIB_NODE_FN (ip6_rewrite_node) (vlib_main_t * vm,
2133 vlib_node_runtime_t * node,
2134 vlib_frame_t * frame)
2136 if (adj_are_counters_enabled ())
2137 return ip6_rewrite_inline (vm, node, frame, 1, 0, 0);
2139 return ip6_rewrite_inline (vm, node, frame, 0, 0, 0);
2142 VLIB_NODE_FN (ip6_rewrite_bcast_node) (vlib_main_t * vm,
2143 vlib_node_runtime_t * node,
2144 vlib_frame_t * frame)
2146 if (adj_are_counters_enabled ())
2147 return ip6_rewrite_inline (vm, node, frame, 1, 0, 0);
2149 return ip6_rewrite_inline (vm, node, frame, 0, 0, 0);
2152 VLIB_NODE_FN (ip6_rewrite_mcast_node) (vlib_main_t * vm,
2153 vlib_node_runtime_t * node,
2154 vlib_frame_t * frame)
2156 if (adj_are_counters_enabled ())
2157 return ip6_rewrite_inline (vm, node, frame, 1, 0, 1);
2159 return ip6_rewrite_inline (vm, node, frame, 0, 0, 1);
2162 VLIB_NODE_FN (ip6_midchain_node) (vlib_main_t * vm,
2163 vlib_node_runtime_t * node,
2164 vlib_frame_t * frame)
2166 if (adj_are_counters_enabled ())
2167 return ip6_rewrite_inline (vm, node, frame, 1, 1, 0);
2169 return ip6_rewrite_inline (vm, node, frame, 0, 1, 0);
2172 VLIB_NODE_FN (ip6_mcast_midchain_node) (vlib_main_t * vm,
2173 vlib_node_runtime_t * node,
2174 vlib_frame_t * frame)
2176 if (adj_are_counters_enabled ())
2177 return ip6_rewrite_inline (vm, node, frame, 1, 1, 1);
2179 return ip6_rewrite_inline (vm, node, frame, 0, 1, 1);
2183 VLIB_REGISTER_NODE (ip6_midchain_node) =
2185 .name = "ip6-midchain",
2186 .vector_size = sizeof (u32),
2187 .format_trace = format_ip6_forward_next_trace,
2188 .sibling_of = "ip6-rewrite",
2191 VLIB_REGISTER_NODE (ip6_rewrite_node) =
2193 .name = "ip6-rewrite",
2194 .vector_size = sizeof (u32),
2195 .format_trace = format_ip6_rewrite_trace,
2196 .n_next_nodes = IP6_REWRITE_N_NEXT,
2199 [IP6_REWRITE_NEXT_DROP] = "ip6-drop",
2200 [IP6_REWRITE_NEXT_ICMP_ERROR] = "ip6-icmp-error",
2201 [IP6_REWRITE_NEXT_FRAGMENT] = "ip6-frag",
2205 VLIB_REGISTER_NODE (ip6_rewrite_bcast_node) = {
2206 .name = "ip6-rewrite-bcast",
2207 .vector_size = sizeof (u32),
2209 .format_trace = format_ip6_rewrite_trace,
2210 .sibling_of = "ip6-rewrite",
2213 VLIB_REGISTER_NODE (ip6_rewrite_mcast_node) =
2215 .name = "ip6-rewrite-mcast",
2216 .vector_size = sizeof (u32),
2217 .format_trace = format_ip6_rewrite_trace,
2218 .sibling_of = "ip6-rewrite",
2222 VLIB_REGISTER_NODE (ip6_mcast_midchain_node) =
2224 .name = "ip6-mcast-midchain",
2225 .vector_size = sizeof (u32),
2226 .format_trace = format_ip6_rewrite_trace,
2227 .sibling_of = "ip6-rewrite",
2233 * Hop-by-Hop handling
2235 #ifndef CLIB_MARCH_VARIANT
2236 ip6_hop_by_hop_main_t ip6_hop_by_hop_main;
2237 #endif /* CLIB_MARCH_VARIANT */
2239 #define foreach_ip6_hop_by_hop_error \
2240 _(PROCESSED, "pkts with ip6 hop-by-hop options") \
2241 _(FORMAT, "incorrectly formatted hop-by-hop options") \
2242 _(UNKNOWN_OPTION, "unknown ip6 hop-by-hop options")
2247 #define _(sym,str) IP6_HOP_BY_HOP_ERROR_##sym,
2248 foreach_ip6_hop_by_hop_error
2250 IP6_HOP_BY_HOP_N_ERROR,
2251 } ip6_hop_by_hop_error_t;
2255 * Primary h-b-h handler trace support
2256 * We work pretty hard on the problem for obvious reasons
2262 u8 option_data[256];
2263 } ip6_hop_by_hop_trace_t;
2265 extern vlib_node_registration_t ip6_hop_by_hop_node;
2267 static char *ip6_hop_by_hop_error_strings[] = {
2268 #define _(sym,string) string,
2269 foreach_ip6_hop_by_hop_error
2273 #ifndef CLIB_MARCH_VARIANT
2275 format_ip6_hop_by_hop_ext_hdr (u8 * s, va_list * args)
2277 ip6_hop_by_hop_header_t *hbh0 = va_arg (*args, ip6_hop_by_hop_header_t *);
2278 int total_len = va_arg (*args, int);
2279 ip6_hop_by_hop_option_t *opt0, *limit0;
2280 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2283 s = format (s, "IP6_HOP_BY_HOP: next protocol %d len %d total %d",
2284 hbh0->protocol, (hbh0->length + 1) << 3, total_len);
2286 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2287 limit0 = (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 + total_len);
2289 while (opt0 < limit0)
2294 case 0: /* Pad, just stop */
2295 opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0 + 1);
2299 if (hm->trace[type0])
2301 s = (*hm->trace[type0]) (s, opt0);
2306 format (s, "\n unrecognized option %d length %d", type0,
2310 (ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length +
2311 sizeof (ip6_hop_by_hop_option_t));
2320 format_ip6_hop_by_hop_trace (u8 * s, va_list * args)
2322 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
2323 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
2324 ip6_hop_by_hop_trace_t *t = va_arg (*args, ip6_hop_by_hop_trace_t *);
2325 ip6_hop_by_hop_header_t *hbh0;
2326 ip6_hop_by_hop_option_t *opt0, *limit0;
2327 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2331 hbh0 = (ip6_hop_by_hop_header_t *) t->option_data;
2333 s = format (s, "IP6_HOP_BY_HOP: next index %d len %d traced %d",
2334 t->next_index, (hbh0->length + 1) << 3, t->trace_len);
2336 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2337 limit0 = (ip6_hop_by_hop_option_t *) ((u8 *) hbh0) + t->trace_len;
2339 while (opt0 < limit0)
2344 case 0: /* Pad, just stop */
2345 opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0) + 1;
2349 if (hm->trace[type0])
2351 s = (*hm->trace[type0]) (s, opt0);
2356 format (s, "\n unrecognized option %d length %d", type0,
2360 (ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length +
2361 sizeof (ip6_hop_by_hop_option_t));
2369 ip6_scan_hbh_options (vlib_buffer_t * b0,
2371 ip6_hop_by_hop_header_t * hbh0,
2372 ip6_hop_by_hop_option_t * opt0,
2373 ip6_hop_by_hop_option_t * limit0, u32 * next0)
2375 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2379 while (opt0 < limit0)
2385 opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0) + 1;
2390 if (hm->options[type0])
2392 if ((*hm->options[type0]) (b0, ip0, opt0) < 0)
2394 error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2400 /* Unrecognized mandatory option, check the two high order bits */
2401 switch (opt0->type & HBH_OPTION_TYPE_HIGH_ORDER_BITS)
2403 case HBH_OPTION_TYPE_SKIP_UNKNOWN:
2405 case HBH_OPTION_TYPE_DISCARD_UNKNOWN:
2406 error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2407 *next0 = IP_LOOKUP_NEXT_DROP;
2409 case HBH_OPTION_TYPE_DISCARD_UNKNOWN_ICMP:
2410 error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2411 *next0 = IP_LOOKUP_NEXT_ICMP_ERROR;
2412 icmp6_error_set_vnet_buffer (b0, ICMP6_parameter_problem,
2413 ICMP6_parameter_problem_unrecognized_option,
2414 (u8 *) opt0 - (u8 *) ip0);
2416 case HBH_OPTION_TYPE_DISCARD_UNKNOWN_ICMP_NOT_MCAST:
2417 error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2418 if (!ip6_address_is_multicast (&ip0->dst_address))
2420 *next0 = IP_LOOKUP_NEXT_ICMP_ERROR;
2421 icmp6_error_set_vnet_buffer (b0,
2422 ICMP6_parameter_problem,
2423 ICMP6_parameter_problem_unrecognized_option,
2424 (u8 *) opt0 - (u8 *) ip0);
2428 *next0 = IP_LOOKUP_NEXT_DROP;
2436 (ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length +
2437 sizeof (ip6_hop_by_hop_option_t));
2443 * Process the Hop-by-Hop Options header
2445 VLIB_NODE_FN (ip6_hop_by_hop_node) (vlib_main_t * vm,
2446 vlib_node_runtime_t * node,
2447 vlib_frame_t * frame)
2449 vlib_node_runtime_t *error_node =
2450 vlib_node_get_runtime (vm, ip6_hop_by_hop_node.index);
2451 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2452 u32 n_left_from, *from, *to_next;
2453 ip_lookup_next_t next_index;
2455 from = vlib_frame_vector_args (frame);
2456 n_left_from = frame->n_vectors;
2457 next_index = node->cached_next_index;
2459 while (n_left_from > 0)
2463 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
2465 while (n_left_from >= 4 && n_left_to_next >= 2)
2468 vlib_buffer_t *b0, *b1;
2470 ip6_header_t *ip0, *ip1;
2471 ip6_hop_by_hop_header_t *hbh0, *hbh1;
2472 ip6_hop_by_hop_option_t *opt0, *limit0, *opt1, *limit1;
2473 u8 error0 = 0, error1 = 0;
2475 /* Prefetch next iteration. */
2477 vlib_buffer_t *p2, *p3;
2479 p2 = vlib_get_buffer (vm, from[2]);
2480 p3 = vlib_get_buffer (vm, from[3]);
2482 vlib_prefetch_buffer_header (p2, LOAD);
2483 vlib_prefetch_buffer_header (p3, LOAD);
2485 CLIB_PREFETCH (p2->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
2486 CLIB_PREFETCH (p3->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
2489 /* Speculatively enqueue b0, b1 to the current next frame */
2490 to_next[0] = bi0 = from[0];
2491 to_next[1] = bi1 = from[1];
2495 n_left_to_next -= 2;
2497 b0 = vlib_get_buffer (vm, bi0);
2498 b1 = vlib_get_buffer (vm, bi1);
2500 /* Default use the next_index from the adjacency. A HBH option rarely redirects to a different node */
2501 u32 adj_index0 = vnet_buffer (b0)->ip.adj_index[VLIB_TX];
2502 ip_adjacency_t *adj0 = adj_get (adj_index0);
2503 u32 adj_index1 = vnet_buffer (b1)->ip.adj_index[VLIB_TX];
2504 ip_adjacency_t *adj1 = adj_get (adj_index1);
2506 /* Default use the next_index from the adjacency. A HBH option rarely redirects to a different node */
2507 next0 = adj0->lookup_next_index;
2508 next1 = adj1->lookup_next_index;
2510 ip0 = vlib_buffer_get_current (b0);
2511 ip1 = vlib_buffer_get_current (b1);
2512 hbh0 = (ip6_hop_by_hop_header_t *) (ip0 + 1);
2513 hbh1 = (ip6_hop_by_hop_header_t *) (ip1 + 1);
2514 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2515 opt1 = (ip6_hop_by_hop_option_t *) (hbh1 + 1);
2517 (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 +
2518 ((hbh0->length + 1) << 3));
2520 (ip6_hop_by_hop_option_t *) ((u8 *) hbh1 +
2521 ((hbh1->length + 1) << 3));
2524 * Basic validity checks
2526 if ((hbh0->length + 1) << 3 >
2527 clib_net_to_host_u16 (ip0->payload_length))
2529 error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2530 next0 = IP_LOOKUP_NEXT_DROP;
2533 /* Scan the set of h-b-h options, process ones that we understand */
2534 error0 = ip6_scan_hbh_options (b0, ip0, hbh0, opt0, limit0, &next0);
2536 if ((hbh1->length + 1) << 3 >
2537 clib_net_to_host_u16 (ip1->payload_length))
2539 error1 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2540 next1 = IP_LOOKUP_NEXT_DROP;
2543 /* Scan the set of h-b-h options, process ones that we understand */
2544 error1 = ip6_scan_hbh_options (b1, ip1, hbh1, opt1, limit1, &next1);
2547 /* Has the classifier flagged this buffer for special treatment? */
2550 && (vnet_buffer (b0)->l2_classify.opaque_index & OI_DECAP)))
2551 next0 = hm->next_override;
2553 /* Has the classifier flagged this buffer for special treatment? */
2556 && (vnet_buffer (b1)->l2_classify.opaque_index & OI_DECAP)))
2557 next1 = hm->next_override;
2559 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)))
2561 if (b0->flags & VLIB_BUFFER_IS_TRACED)
2563 ip6_hop_by_hop_trace_t *t =
2564 vlib_add_trace (vm, node, b0, sizeof (*t));
2565 u32 trace_len = (hbh0->length + 1) << 3;
2566 t->next_index = next0;
2567 /* Capture the h-b-h option verbatim */
2570 ARRAY_LEN (t->option_data) ? trace_len :
2571 ARRAY_LEN (t->option_data);
2572 t->trace_len = trace_len;
2573 clib_memcpy_fast (t->option_data, hbh0, trace_len);
2575 if (b1->flags & VLIB_BUFFER_IS_TRACED)
2577 ip6_hop_by_hop_trace_t *t =
2578 vlib_add_trace (vm, node, b1, sizeof (*t));
2579 u32 trace_len = (hbh1->length + 1) << 3;
2580 t->next_index = next1;
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, hbh1, trace_len);
2592 b0->error = error_node->errors[error0];
2593 b1->error = error_node->errors[error1];
2595 /* verify speculative enqueue, maybe switch current next frame */
2596 vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
2597 n_left_to_next, bi0, bi1, next0,
2601 while (n_left_from > 0 && n_left_to_next > 0)
2607 ip6_hop_by_hop_header_t *hbh0;
2608 ip6_hop_by_hop_option_t *opt0, *limit0;
2611 /* Speculatively enqueue b0 to the current next frame */
2617 n_left_to_next -= 1;
2619 b0 = vlib_get_buffer (vm, bi0);
2621 * Default use the next_index from the adjacency.
2622 * A HBH option rarely redirects to a different node
2624 u32 adj_index0 = vnet_buffer (b0)->ip.adj_index[VLIB_TX];
2625 ip_adjacency_t *adj0 = adj_get (adj_index0);
2626 next0 = adj0->lookup_next_index;
2628 ip0 = vlib_buffer_get_current (b0);
2629 hbh0 = (ip6_hop_by_hop_header_t *) (ip0 + 1);
2630 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2632 (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 +
2633 ((hbh0->length + 1) << 3));
2636 * Basic validity checks
2638 if ((hbh0->length + 1) << 3 >
2639 clib_net_to_host_u16 (ip0->payload_length))
2641 error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2642 next0 = IP_LOOKUP_NEXT_DROP;
2646 /* Scan the set of h-b-h options, process ones that we understand */
2647 error0 = ip6_scan_hbh_options (b0, ip0, hbh0, opt0, limit0, &next0);
2650 /* Has the classifier flagged this buffer for special treatment? */
2653 && (vnet_buffer (b0)->l2_classify.opaque_index & OI_DECAP)))
2654 next0 = hm->next_override;
2656 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
2658 ip6_hop_by_hop_trace_t *t =
2659 vlib_add_trace (vm, node, b0, sizeof (*t));
2660 u32 trace_len = (hbh0->length + 1) << 3;
2661 t->next_index = next0;
2662 /* Capture the h-b-h option verbatim */
2665 ARRAY_LEN (t->option_data) ? trace_len :
2666 ARRAY_LEN (t->option_data);
2667 t->trace_len = trace_len;
2668 clib_memcpy_fast (t->option_data, hbh0, trace_len);
2671 b0->error = error_node->errors[error0];
2673 /* verify speculative enqueue, maybe switch current next frame */
2674 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
2675 n_left_to_next, bi0, next0);
2677 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2679 return frame->n_vectors;
2683 VLIB_REGISTER_NODE (ip6_hop_by_hop_node) =
2685 .name = "ip6-hop-by-hop",
2686 .sibling_of = "ip6-lookup",
2687 .vector_size = sizeof (u32),
2688 .format_trace = format_ip6_hop_by_hop_trace,
2689 .type = VLIB_NODE_TYPE_INTERNAL,
2690 .n_errors = ARRAY_LEN (ip6_hop_by_hop_error_strings),
2691 .error_strings = ip6_hop_by_hop_error_strings,
2696 static clib_error_t *
2697 ip6_hop_by_hop_init (vlib_main_t * vm)
2699 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2700 clib_memset (hm->options, 0, sizeof (hm->options));
2701 clib_memset (hm->trace, 0, sizeof (hm->trace));
2702 hm->next_override = IP6_LOOKUP_NEXT_POP_HOP_BY_HOP;
2706 VLIB_INIT_FUNCTION (ip6_hop_by_hop_init);
2708 #ifndef CLIB_MARCH_VARIANT
2710 ip6_hbh_set_next_override (uword next)
2712 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2714 hm->next_override = next;
2718 ip6_hbh_register_option (u8 option,
2719 int options (vlib_buffer_t * b, ip6_header_t * ip,
2720 ip6_hop_by_hop_option_t * opt),
2721 u8 * trace (u8 * s, ip6_hop_by_hop_option_t * opt))
2723 ip6_main_t *im = &ip6_main;
2724 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2726 ASSERT ((u32) option < ARRAY_LEN (hm->options));
2728 /* Already registered */
2729 if (hm->options[option])
2732 hm->options[option] = options;
2733 hm->trace[option] = trace;
2735 /* Set global variable */
2736 im->hbh_enabled = 1;
2742 ip6_hbh_unregister_option (u8 option)
2744 ip6_main_t *im = &ip6_main;
2745 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2747 ASSERT ((u32) option < ARRAY_LEN (hm->options));
2749 /* Not registered */
2750 if (!hm->options[option])
2753 hm->options[option] = NULL;
2754 hm->trace[option] = NULL;
2756 /* Disable global knob if this was the last option configured */
2759 for (i = 0; i < 256; i++)
2761 if (hm->options[option])
2768 im->hbh_enabled = 0;
2773 /* Global IP6 main. */
2774 ip6_main_t ip6_main;
2777 static clib_error_t *
2778 ip6_lookup_init (vlib_main_t * vm)
2780 ip6_main_t *im = &ip6_main;
2781 clib_error_t *error;
2784 if ((error = vlib_call_init_function (vm, vnet_feature_init)))
2787 for (i = 0; i < ARRAY_LEN (im->fib_masks); i++)
2794 for (j = 0; j < i0; j++)
2795 im->fib_masks[i].as_u32[j] = ~0;
2798 im->fib_masks[i].as_u32[i0] =
2799 clib_host_to_net_u32 (pow2_mask (i1) << (32 - i1));
2802 ip_lookup_init (&im->lookup_main, /* is_ip6 */ 1);
2804 if (im->lookup_table_nbuckets == 0)
2805 im->lookup_table_nbuckets = IP6_FIB_DEFAULT_HASH_NUM_BUCKETS;
2807 im->lookup_table_nbuckets = 1 << max_log2 (im->lookup_table_nbuckets);
2809 if (im->lookup_table_size == 0)
2810 im->lookup_table_size = IP6_FIB_DEFAULT_HASH_MEMORY_SIZE;
2812 clib_bihash_init_24_8 (&(im->ip6_table[IP6_FIB_TABLE_FWDING].ip6_hash),
2813 "ip6 FIB fwding table",
2814 im->lookup_table_nbuckets, im->lookup_table_size);
2815 clib_bihash_init_24_8 (&im->ip6_table[IP6_FIB_TABLE_NON_FWDING].ip6_hash,
2816 "ip6 FIB non-fwding table",
2817 im->lookup_table_nbuckets, im->lookup_table_size);
2818 clib_bihash_init_40_8 (&im->ip6_mtable.ip6_mhash,
2820 im->lookup_table_nbuckets, im->lookup_table_size);
2822 /* Create FIB with index 0 and table id of 0. */
2823 fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6, 0,
2824 FIB_SOURCE_DEFAULT_ROUTE);
2825 mfib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6, 0,
2826 MFIB_SOURCE_DEFAULT_ROUTE);
2830 pn = pg_get_node (ip6_lookup_node.index);
2831 pn->unformat_edit = unformat_pg_ip6_header;
2834 /* Unless explicitly configured, don't process HBH options */
2835 im->hbh_enabled = 0;
2840 VLIB_INIT_FUNCTION (ip6_lookup_init);
2842 #ifndef CLIB_MARCH_VARIANT
2844 vnet_set_ip6_flow_hash (u32 table_id, u32 flow_hash_config)
2848 fib_index = fib_table_find (FIB_PROTOCOL_IP6, table_id);
2850 if (~0 == fib_index)
2851 return VNET_API_ERROR_NO_SUCH_FIB;
2853 fib_table_set_flow_hash_config (fib_index, FIB_PROTOCOL_IP6,
2860 static clib_error_t *
2861 set_ip6_flow_hash_command_fn (vlib_main_t * vm,
2862 unformat_input_t * input,
2863 vlib_cli_command_t * cmd)
2867 u32 flow_hash_config = 0;
2870 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
2872 if (unformat (input, "table %d", &table_id))
2875 else if (unformat (input, #a)) { flow_hash_config |= v; matched=1;}
2876 foreach_flow_hash_bit
2883 return clib_error_return (0, "unknown input `%U'",
2884 format_unformat_error, input);
2886 rv = vnet_set_ip6_flow_hash (table_id, flow_hash_config);
2893 return clib_error_return (0, "no such FIB table %d", table_id);
2896 clib_warning ("BUG: illegal flow hash config 0x%x", flow_hash_config);
2904 * Configure the set of IPv6 fields used by the flow hash.
2908 * Example of how to set the flow hash on a given table:
2909 * @cliexcmd{set ip6 flow-hash table 8 dst sport dport proto}
2911 * Example of display the configured flow hash:
2912 * @cliexstart{show ip6 fib}
2913 * ipv6-VRF:0, fib_index 0, flow hash: src dst sport dport proto
2916 * [@0]: dpo-load-balance: [index:5 buckets:1 uRPF:5 to:[0:0]]
2917 * [0] [@0]: dpo-drop ip6
2920 * [@0]: dpo-load-balance: [index:10 buckets:1 uRPF:10 to:[0:0]]
2921 * [0] [@2]: dpo-receive
2924 * [@0]: dpo-load-balance: [index:8 buckets:1 uRPF:8 to:[0:0]]
2925 * [0] [@2]: dpo-receive
2928 * [@0]: dpo-load-balance: [index:7 buckets:1 uRPF:7 to:[0:0]]
2929 * [0] [@2]: dpo-receive
2932 * [@0]: dpo-load-balance: [index:9 buckets:1 uRPF:9 to:[0:0]]
2933 * [0] [@2]: dpo-receive
2934 * ff02::1:ff00:0/104
2936 * [@0]: dpo-load-balance: [index:6 buckets:1 uRPF:6 to:[0:0]]
2937 * [0] [@2]: dpo-receive
2938 * ipv6-VRF:8, fib_index 1, flow hash: dst sport dport proto
2941 * [@0]: dpo-load-balance: [index:21 buckets:1 uRPF:20 to:[0:0]]
2942 * [0] [@0]: dpo-drop ip6
2945 * [@0]: dpo-load-balance: [index:27 buckets:1 uRPF:26 to:[0:0]]
2946 * [0] [@4]: ipv6-glean: af_packet0
2949 * [@0]: dpo-load-balance: [index:28 buckets:1 uRPF:27 to:[0:0]]
2950 * [0] [@2]: dpo-receive: @::a:1:1:0:7 on af_packet0
2953 * [@0]: dpo-load-balance: [index:26 buckets:1 uRPF:25 to:[0:0]]
2954 * [0] [@2]: dpo-receive
2955 * fe80::fe:3eff:fe3e:9222/128
2957 * [@0]: dpo-load-balance: [index:29 buckets:1 uRPF:28 to:[0:0]]
2958 * [0] [@2]: dpo-receive: fe80::fe:3eff:fe3e:9222 on af_packet0
2961 * [@0]: dpo-load-balance: [index:24 buckets:1 uRPF:23 to:[0:0]]
2962 * [0] [@2]: dpo-receive
2965 * [@0]: dpo-load-balance: [index:23 buckets:1 uRPF:22 to:[0:0]]
2966 * [0] [@2]: dpo-receive
2969 * [@0]: dpo-load-balance: [index:25 buckets:1 uRPF:24 to:[0:0]]
2970 * [0] [@2]: dpo-receive
2971 * ff02::1:ff00:0/104
2973 * [@0]: dpo-load-balance: [index:22 buckets:1 uRPF:21 to:[0:0]]
2974 * [0] [@2]: dpo-receive
2979 VLIB_CLI_COMMAND (set_ip6_flow_hash_command, static) =
2981 .path = "set ip6 flow-hash",
2983 "set ip6 flow-hash table <table-id> [src] [dst] [sport] [dport] [proto] [reverse]",
2984 .function = set_ip6_flow_hash_command_fn,
2988 static clib_error_t *
2989 show_ip6_local_command_fn (vlib_main_t * vm,
2990 unformat_input_t * input, vlib_cli_command_t * cmd)
2992 ip6_main_t *im = &ip6_main;
2993 ip_lookup_main_t *lm = &im->lookup_main;
2996 vlib_cli_output (vm, "Protocols handled by ip6_local");
2997 for (i = 0; i < ARRAY_LEN (lm->local_next_by_ip_protocol); i++)
2999 if (lm->local_next_by_ip_protocol[i] != IP_LOCAL_NEXT_PUNT)
3002 u32 node_index = vlib_get_node (vm,
3003 ip6_local_node.index)->
3004 next_nodes[lm->local_next_by_ip_protocol[i]];
3005 vlib_cli_output (vm, "%d: %U", i, format_vlib_node_name, vm,
3015 * Display the set of protocols handled by the local IPv6 stack.
3018 * Example of how to display local protocol table:
3019 * @cliexstart{show ip6 local}
3020 * Protocols handled by ip6_local
3028 VLIB_CLI_COMMAND (show_ip6_local, static) =
3030 .path = "show ip6 local",
3031 .function = show_ip6_local_command_fn,
3032 .short_help = "show ip6 local",
3036 #ifndef CLIB_MARCH_VARIANT
3038 vnet_set_ip6_classify_intfc (vlib_main_t * vm, u32 sw_if_index,
3041 vnet_main_t *vnm = vnet_get_main ();
3042 vnet_interface_main_t *im = &vnm->interface_main;
3043 ip6_main_t *ipm = &ip6_main;
3044 ip_lookup_main_t *lm = &ipm->lookup_main;
3045 vnet_classify_main_t *cm = &vnet_classify_main;
3046 ip6_address_t *if_addr;
3048 if (pool_is_free_index (im->sw_interfaces, sw_if_index))
3049 return VNET_API_ERROR_NO_MATCHING_INTERFACE;
3051 if (table_index != ~0 && pool_is_free_index (cm->tables, table_index))
3052 return VNET_API_ERROR_NO_SUCH_ENTRY;
3054 vec_validate (lm->classify_table_index_by_sw_if_index, sw_if_index);
3055 lm->classify_table_index_by_sw_if_index[sw_if_index] = table_index;
3057 if_addr = ip6_interface_first_address (ipm, sw_if_index);
3059 if (NULL != if_addr)
3061 fib_prefix_t pfx = {
3063 .fp_proto = FIB_PROTOCOL_IP6,
3064 .fp_addr.ip6 = *if_addr,
3068 fib_index = fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4,
3072 if (table_index != (u32) ~ 0)
3074 dpo_id_t dpo = DPO_INVALID;
3079 classify_dpo_create (DPO_PROTO_IP6, table_index));
3081 fib_table_entry_special_dpo_add (fib_index,
3083 FIB_SOURCE_CLASSIFY,
3084 FIB_ENTRY_FLAG_NONE, &dpo);
3089 fib_table_entry_special_remove (fib_index,
3090 &pfx, FIB_SOURCE_CLASSIFY);
3098 static clib_error_t *
3099 set_ip6_classify_command_fn (vlib_main_t * vm,
3100 unformat_input_t * input,
3101 vlib_cli_command_t * cmd)
3103 u32 table_index = ~0;
3104 int table_index_set = 0;
3105 u32 sw_if_index = ~0;
3108 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
3110 if (unformat (input, "table-index %d", &table_index))
3111 table_index_set = 1;
3112 else if (unformat (input, "intfc %U", unformat_vnet_sw_interface,
3113 vnet_get_main (), &sw_if_index))
3119 if (table_index_set == 0)
3120 return clib_error_return (0, "classify table-index must be specified");
3122 if (sw_if_index == ~0)
3123 return clib_error_return (0, "interface / subif must be specified");
3125 rv = vnet_set_ip6_classify_intfc (vm, sw_if_index, table_index);
3132 case VNET_API_ERROR_NO_MATCHING_INTERFACE:
3133 return clib_error_return (0, "No such interface");
3135 case VNET_API_ERROR_NO_SUCH_ENTRY:
3136 return clib_error_return (0, "No such classifier table");
3142 * Assign a classification table to an interface. The classification
3143 * table is created using the '<em>classify table</em>' and '<em>classify session</em>'
3144 * commands. Once the table is create, use this command to filter packets
3148 * Example of how to assign a classification table to an interface:
3149 * @cliexcmd{set ip6 classify intfc GigabitEthernet2/0/0 table-index 1}
3152 VLIB_CLI_COMMAND (set_ip6_classify_command, static) =
3154 .path = "set ip6 classify",
3156 "set ip6 classify intfc <interface> table-index <classify-idx>",
3157 .function = set_ip6_classify_command_fn,
3161 static clib_error_t *
3162 ip6_config (vlib_main_t * vm, unformat_input_t * input)
3164 ip6_main_t *im = &ip6_main;
3169 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
3171 if (unformat (input, "hash-buckets %d", &tmp))
3173 else if (unformat (input, "heap-size %U",
3174 unformat_memory_size, &heapsize))
3177 return clib_error_return (0, "unknown input '%U'",
3178 format_unformat_error, input);
3181 im->lookup_table_nbuckets = nbuckets;
3182 im->lookup_table_size = heapsize;
3187 VLIB_EARLY_CONFIG_FUNCTION (ip6_config, "ip6");
3190 * fd.io coding-style-patch-verification: ON
3193 * eval: (c-set-style "gnu")