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>
53 #include <vnet/pg/pg.h>
55 #ifndef CLIB_MARCH_VARIANT
56 #include <vppinfra/bihash_template.c>
58 #include <vnet/ip/ip6_forward.h>
59 #include <vnet/interface_output.h>
61 /* Flag used by IOAM code. Classifier sets it pop-hop-by-hop checks it */
62 #define OI_DECAP 0x80000000
65 ip6_add_interface_prefix_routes (ip6_main_t * im,
68 ip6_address_t * address, u32 address_length)
70 ip_lookup_main_t *lm = &im->lookup_main;
71 ip_interface_prefix_t *if_prefix;
74 ip_interface_prefix_key_t key = {
76 .fp_len = address_length,
77 .fp_proto = FIB_PROTOCOL_IP6,
80 address->as_u64[0] & im->fib_masks[address_length].as_u64[0],
81 address->as_u64[1] & im->fib_masks[address_length].as_u64[1],
85 .sw_if_index = sw_if_index,
89 /* If prefix already set on interface, just increment ref count & return */
90 if_prefix = ip_get_interface_prefix (lm, &key);
93 if_prefix->ref_count += 1;
97 /* New prefix - allocate a pool entry, initialize it, add to the hash */
98 pool_get (lm->if_prefix_pool, if_prefix);
99 if_prefix->ref_count = 1;
100 clib_memcpy (&if_prefix->key, &key, sizeof (key));
101 mhash_set (&lm->prefix_to_if_prefix_index, &key,
102 if_prefix - lm->if_prefix_pool, 0 /* old value */ );
104 /* length < 128 - add glean */
105 if (address_length < 128)
107 /* set the glean route for the prefix */
108 fib_table_entry_update_one_path (fib_index, &key.prefix,
109 FIB_SOURCE_INTERFACE,
110 (FIB_ENTRY_FLAG_CONNECTED |
111 FIB_ENTRY_FLAG_ATTACHED),
113 /* No next-hop address */
115 /* invalid FIB index */
117 /* no out-label stack */
118 NULL, FIB_ROUTE_PATH_FLAG_NONE);
123 ip6_add_interface_routes (vnet_main_t * vnm, u32 sw_if_index,
124 ip6_main_t * im, u32 fib_index,
125 ip_interface_address_t * a)
127 ip_lookup_main_t *lm = &im->lookup_main;
128 ip6_address_t *address = ip_interface_address_get_address (lm, a);
130 .fp_len = a->address_length,
131 .fp_proto = FIB_PROTOCOL_IP6,
132 .fp_addr.ip6 = *address,
135 /* set special routes for the prefix if needed */
136 ip6_add_interface_prefix_routes (im, sw_if_index, fib_index,
137 address, a->address_length);
140 if (sw_if_index < vec_len (lm->classify_table_index_by_sw_if_index))
142 u32 classify_table_index =
143 lm->classify_table_index_by_sw_if_index[sw_if_index];
144 if (classify_table_index != (u32) ~ 0)
146 dpo_id_t dpo = DPO_INVALID;
151 classify_dpo_create (DPO_PROTO_IP6, classify_table_index));
153 fib_table_entry_special_dpo_add (fib_index,
156 FIB_ENTRY_FLAG_NONE, &dpo);
161 fib_table_entry_update_one_path (fib_index, &pfx,
162 FIB_SOURCE_INTERFACE,
163 (FIB_ENTRY_FLAG_CONNECTED |
164 FIB_ENTRY_FLAG_LOCAL),
168 1, NULL, FIB_ROUTE_PATH_FLAG_NONE);
172 ip6_del_interface_prefix_routes (ip6_main_t * im,
175 ip6_address_t * address, u32 address_length)
177 ip_lookup_main_t *lm = &im->lookup_main;
178 ip_interface_prefix_t *if_prefix;
181 ip_interface_prefix_key_t key = {
183 .fp_len = address_length,
184 .fp_proto = FIB_PROTOCOL_IP6,
187 address->as_u64[0] & im->fib_masks[address_length].as_u64[0],
188 address->as_u64[1] & im->fib_masks[address_length].as_u64[1],
192 .sw_if_index = sw_if_index,
196 if_prefix = ip_get_interface_prefix (lm, &key);
199 clib_warning ("Prefix not found while deleting %U",
200 format_ip4_address_and_length, address, address_length);
204 /* If not deleting last intf addr in prefix, decrement ref count & return */
205 if_prefix->ref_count -= 1;
206 if (if_prefix->ref_count > 0)
209 /* length <= 128, delete glean route */
210 if (address_length <= 128)
212 /* remove glean route for prefix */
213 fib_table_entry_delete (fib_index, &key.prefix, FIB_SOURCE_INTERFACE);
216 mhash_unset (&lm->prefix_to_if_prefix_index, &key, 0 /* old_value */ );
217 pool_put (lm->if_prefix_pool, if_prefix);
221 ip6_del_interface_routes (u32 sw_if_index, ip6_main_t * im,
223 ip6_address_t * address, u32 address_length)
227 .fp_proto = FIB_PROTOCOL_IP6,
228 .fp_addr.ip6 = *address,
231 /* delete special routes for the prefix if needed */
232 ip6_del_interface_prefix_routes (im, sw_if_index, fib_index,
233 address, address_length);
235 fib_table_entry_delete (fib_index, &pfx, FIB_SOURCE_INTERFACE);
238 #ifndef CLIB_MARCH_VARIANT
240 ip6_sw_interface_enable_disable (u32 sw_if_index, u32 is_enable)
242 ip6_main_t *im = &ip6_main;
243 vnet_main_t *vnm = vnet_get_main ();
244 vnet_hw_interface_t *hi = vnet_get_sup_hw_interface (vnm, sw_if_index);
246 vec_validate_init_empty (im->ip_enabled_by_sw_if_index, sw_if_index, 0);
249 * enable/disable only on the 1<->0 transition
253 if (1 != ++im->ip_enabled_by_sw_if_index[sw_if_index])
258 /* The ref count is 0 when an address is removed from an interface that has
259 * no address - this is not a ciritical error */
260 if (0 == im->ip_enabled_by_sw_if_index[sw_if_index] ||
261 0 != --im->ip_enabled_by_sw_if_index[sw_if_index])
265 vnet_feature_enable_disable ("ip6-unicast", "ip6-not-enabled", sw_if_index,
268 vnet_feature_enable_disable ("ip6-multicast", "ip6-not-enabled",
269 sw_if_index, !is_enable, 0, 0);
273 else if (hi->l3_if_count)
277 /* get first interface address */
279 ip6_interface_first_address (ip6_main_t * im, u32 sw_if_index)
281 ip_lookup_main_t *lm = &im->lookup_main;
282 ip_interface_address_t *ia = 0;
283 ip6_address_t *result = 0;
286 foreach_ip_interface_address (lm, ia, sw_if_index,
287 1 /* honor unnumbered */,
289 ip6_address_t * a = ip_interface_address_get_address (lm, ia);
298 ip6_add_del_interface_address (vlib_main_t * vm,
300 ip6_address_t * address,
301 u32 address_length, u32 is_del)
303 vnet_main_t *vnm = vnet_get_main ();
304 ip6_main_t *im = &ip6_main;
305 ip_lookup_main_t *lm = &im->lookup_main;
306 clib_error_t *error = NULL;
307 u32 if_address_index;
308 ip6_address_fib_t ip6_af, *addr_fib = 0;
309 const ip6_address_t *ll_addr;
311 /* local0 interface doesn't support IP addressing */
312 if (sw_if_index == 0)
315 clib_error_create ("local0 interface doesn't support IP addressing");
318 if (ip6_address_is_link_local_unicast (address))
320 if (address_length != 128)
322 vnm->api_errno = VNET_API_ERROR_ADDRESS_LENGTH_MISMATCH;
325 ("prefix length of link-local address must be 128");
331 rv = ip6_link_set_local_address (sw_if_index, address);
336 return clib_error_create ("address not assignable");
341 ll_addr = ip6_get_link_local_address (sw_if_index);
342 if (ip6_address_is_equal (ll_addr, address))
344 vnm->api_errno = VNET_API_ERROR_ADDRESS_NOT_DELETABLE;
345 return clib_error_create ("address not deletable");
349 vnm->api_errno = VNET_API_ERROR_ADDRESS_NOT_FOUND_FOR_INTERFACE;
350 return clib_error_create ("address not found");
357 vec_validate (im->fib_index_by_sw_if_index, sw_if_index);
358 vec_validate (im->mfib_index_by_sw_if_index, sw_if_index);
360 ip6_addr_fib_init (&ip6_af, address,
361 vec_elt (im->fib_index_by_sw_if_index, sw_if_index));
362 vec_add1 (addr_fib, ip6_af);
367 /* When adding an address check that it does not conflict
368 with an existing address on any interface in this table. */
369 ip_interface_address_t *ia;
370 vnet_sw_interface_t *sif;
372 pool_foreach (sif, vnm->interface_main.sw_interfaces)
374 if (im->fib_index_by_sw_if_index[sw_if_index] ==
375 im->fib_index_by_sw_if_index[sif->sw_if_index])
377 foreach_ip_interface_address
378 (&im->lookup_main, ia, sif->sw_if_index,
379 0 /* honor unnumbered */ ,
382 ip_interface_address_get_address
383 (&im->lookup_main, ia);
385 if (ip6_destination_matches_route
386 (im, address, x, ia->address_length) ||
387 ip6_destination_matches_route (im,
392 /* an intf may have >1 addr from the same prefix */
393 if ((sw_if_index == sif->sw_if_index) &&
394 (ia->address_length == address_length) &&
395 !ip6_address_is_equal (x, address))
398 if (ia->flags & IP_INTERFACE_ADDRESS_FLAG_STALE)
399 /* if the address we're comparing against is stale
400 * then the CP has not added this one back yet, maybe
401 * it never will, so we have to assume it won't and
402 * ignore it. if it does add it back, then it will fail
403 * because this one is now present */
406 /* error if the length or intf was different */
407 vnm->api_errno = VNET_API_ERROR_DUPLICATE_IF_ADDRESS;
408 error = clib_error_create
409 ("failed to add %U which conflicts with %U for interface %U",
410 format_ip6_address_and_length, address,
412 format_ip6_address_and_length, x,
414 format_vnet_sw_if_index_name, vnm,
424 if_address_index = ip_interface_address_find (lm, addr_fib, address_length);
428 if (~0 == if_address_index)
430 vnm->api_errno = VNET_API_ERROR_ADDRESS_NOT_FOUND_FOR_INTERFACE;
431 error = clib_error_create ("%U not found for interface %U",
432 lm->format_address_and_length,
433 addr_fib, address_length,
434 format_vnet_sw_if_index_name, vnm,
439 error = ip_interface_address_del (lm, vnm, if_address_index, addr_fib,
440 address_length, sw_if_index);
446 if (~0 != if_address_index)
448 ip_interface_address_t *ia;
450 ia = pool_elt_at_index (lm->if_address_pool, if_address_index);
452 if (ia->flags & IP_INTERFACE_ADDRESS_FLAG_STALE)
454 if (ia->sw_if_index == sw_if_index)
456 /* re-adding an address during the replace action.
457 * consdier this the update. clear the flag and
459 ia->flags &= ~IP_INTERFACE_ADDRESS_FLAG_STALE;
464 /* The prefix is moving from one interface to another.
465 * delete the stale and add the new */
466 ip6_add_del_interface_address (vm,
468 address, address_length, 1);
470 error = ip_interface_address_add (lm, sw_if_index,
471 addr_fib, address_length,
477 vnm->api_errno = VNET_API_ERROR_DUPLICATE_IF_ADDRESS;
478 error = clib_error_create
479 ("Prefix %U already found on interface %U",
480 lm->format_address_and_length, addr_fib, address_length,
481 format_vnet_sw_if_index_name, vnm, ia->sw_if_index);
485 error = ip_interface_address_add (lm, sw_if_index,
486 addr_fib, address_length,
493 ip6_sw_interface_enable_disable (sw_if_index, !is_del);
495 ip6_link_enable (sw_if_index, NULL);
497 /* intf addr routes are added/deleted on admin up/down */
498 if (vnet_sw_interface_is_admin_up (vnm, sw_if_index))
501 ip6_del_interface_routes (sw_if_index,
502 im, ip6_af.fib_index, address,
505 ip6_add_interface_routes (vnm, sw_if_index,
506 im, ip6_af.fib_index,
507 pool_elt_at_index (lm->if_address_pool,
511 ip6_add_del_interface_address_callback_t *cb;
512 vec_foreach (cb, im->add_del_interface_address_callbacks)
513 cb->function (im, cb->function_opaque, sw_if_index,
514 address, address_length, if_address_index, is_del);
517 ip6_link_disable (sw_if_index);
526 static clib_error_t *
527 ip6_sw_interface_admin_up_down (vnet_main_t * vnm, u32 sw_if_index, u32 flags)
529 ip6_main_t *im = &ip6_main;
530 ip_interface_address_t *ia;
532 u32 is_admin_up, fib_index;
534 /* Fill in lookup tables with default table (0). */
535 vec_validate (im->fib_index_by_sw_if_index, sw_if_index);
537 vec_validate_init_empty (im->
538 lookup_main.if_address_pool_index_by_sw_if_index,
541 is_admin_up = (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) != 0;
543 fib_index = vec_elt (im->fib_index_by_sw_if_index, sw_if_index);
546 foreach_ip_interface_address (&im->lookup_main, ia, sw_if_index,
547 0 /* honor unnumbered */,
549 a = ip_interface_address_get_address (&im->lookup_main, ia);
551 ip6_add_interface_routes (vnm, sw_if_index,
555 ip6_del_interface_routes (sw_if_index, im, fib_index,
556 a, ia->address_length);
563 VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION (ip6_sw_interface_admin_up_down);
565 /* Built-in ip6 unicast rx feature path definition */
567 VNET_FEATURE_ARC_INIT (ip6_unicast, static) =
569 .arc_name = "ip6-unicast",
570 .start_nodes = VNET_FEATURES ("ip6-input"),
571 .last_in_arc = "ip6-lookup",
572 .arc_index_ptr = &ip6_main.lookup_main.ucast_feature_arc_index,
575 VNET_FEATURE_INIT (ip6_flow_classify, static) =
577 .arc_name = "ip6-unicast",
578 .node_name = "ip6-flow-classify",
579 .runs_before = VNET_FEATURES ("ip6-inacl"),
582 VNET_FEATURE_INIT (ip6_inacl, static) =
584 .arc_name = "ip6-unicast",
585 .node_name = "ip6-inacl",
586 .runs_before = VNET_FEATURES ("ip6-policer-classify"),
589 VNET_FEATURE_INIT (ip6_policer_classify, static) =
591 .arc_name = "ip6-unicast",
592 .node_name = "ip6-policer-classify",
593 .runs_before = VNET_FEATURES ("ipsec6-input-feature"),
596 VNET_FEATURE_INIT (ip6_ipsec, static) =
598 .arc_name = "ip6-unicast",
599 .node_name = "ipsec6-input-feature",
600 .runs_before = VNET_FEATURES ("l2tp-decap"),
603 VNET_FEATURE_INIT (ip6_l2tp, static) =
605 .arc_name = "ip6-unicast",
606 .node_name = "l2tp-decap",
607 .runs_before = VNET_FEATURES ("vpath-input-ip6"),
610 VNET_FEATURE_INIT (ip6_vpath, static) =
612 .arc_name = "ip6-unicast",
613 .node_name = "vpath-input-ip6",
614 .runs_before = VNET_FEATURES ("ip6-vxlan-bypass"),
617 VNET_FEATURE_INIT (ip6_vxlan_bypass, static) =
619 .arc_name = "ip6-unicast",
620 .node_name = "ip6-vxlan-bypass",
621 .runs_before = VNET_FEATURES ("ip6-lookup"),
624 VNET_FEATURE_INIT (ip6_not_enabled, static) =
626 .arc_name = "ip6-unicast",
627 .node_name = "ip6-not-enabled",
628 .runs_before = VNET_FEATURES ("ip6-lookup"),
631 VNET_FEATURE_INIT (ip6_lookup, static) =
633 .arc_name = "ip6-unicast",
634 .node_name = "ip6-lookup",
635 .runs_before = 0, /*last feature*/
638 /* Built-in ip6 multicast rx feature path definition (none now) */
639 VNET_FEATURE_ARC_INIT (ip6_multicast, static) =
641 .arc_name = "ip6-multicast",
642 .start_nodes = VNET_FEATURES ("ip6-input"),
643 .last_in_arc = "ip6-mfib-forward-lookup",
644 .arc_index_ptr = &ip6_main.lookup_main.mcast_feature_arc_index,
647 VNET_FEATURE_INIT (ip6_vpath_mc, static) = {
648 .arc_name = "ip6-multicast",
649 .node_name = "vpath-input-ip6",
650 .runs_before = VNET_FEATURES ("ip6-mfib-forward-lookup"),
653 VNET_FEATURE_INIT (ip6_not_enabled_mc, static) = {
654 .arc_name = "ip6-multicast",
655 .node_name = "ip6-not-enabled",
656 .runs_before = VNET_FEATURES ("ip6-mfib-forward-lookup"),
659 VNET_FEATURE_INIT (ip6_mc_lookup, static) = {
660 .arc_name = "ip6-multicast",
661 .node_name = "ip6-mfib-forward-lookup",
662 .runs_before = 0, /* last feature */
665 /* Built-in ip4 tx feature path definition */
666 VNET_FEATURE_ARC_INIT (ip6_output, static) =
668 .arc_name = "ip6-output",
669 .start_nodes = VNET_FEATURES ("ip6-rewrite", "ip6-midchain", "ip6-dvr-dpo"),
670 .last_in_arc = "interface-output",
671 .arc_index_ptr = &ip6_main.lookup_main.output_feature_arc_index,
674 VNET_FEATURE_INIT (ip6_outacl, static) = {
675 .arc_name = "ip6-output",
676 .node_name = "ip6-outacl",
677 .runs_before = VNET_FEATURES ("ipsec6-output-feature"),
680 VNET_FEATURE_INIT (ip6_ipsec_output, static) = {
681 .arc_name = "ip6-output",
682 .node_name = "ipsec6-output-feature",
683 .runs_before = VNET_FEATURES ("interface-output"),
686 VNET_FEATURE_INIT (ip6_interface_output, static) = {
687 .arc_name = "ip6-output",
688 .node_name = "interface-output",
689 .runs_before = 0, /* not before any other features */
693 static clib_error_t *
694 ip6_sw_interface_add_del (vnet_main_t * vnm, u32 sw_if_index, u32 is_add)
696 ip6_main_t *im = &ip6_main;
698 vec_validate (im->fib_index_by_sw_if_index, sw_if_index);
699 vec_validate (im->mfib_index_by_sw_if_index, sw_if_index);
703 /* Ensure that IPv6 is disabled */
704 ip6_main_t *im6 = &ip6_main;
705 ip_lookup_main_t *lm6 = &im6->lookup_main;
706 ip_interface_address_t *ia = 0;
707 ip6_address_t *address;
708 vlib_main_t *vm = vlib_get_main ();
710 vnet_sw_interface_update_unnumbered (sw_if_index, ~0, 0);
712 foreach_ip_interface_address (lm6, ia, sw_if_index, 0,
714 address = ip_interface_address_get_address (lm6, ia);
715 ip6_add_del_interface_address(vm, sw_if_index, address, ia->address_length, 1);
718 ip6_mfib_interface_enable_disable (sw_if_index, 0);
721 vnet_feature_enable_disable ("ip6-unicast", "ip6-not-enabled", sw_if_index,
724 vnet_feature_enable_disable ("ip6-multicast", "ip6-not-enabled",
725 sw_if_index, is_add, 0, 0);
727 return /* no error */ 0;
730 VNET_SW_INTERFACE_ADD_DEL_FUNCTION (ip6_sw_interface_add_del);
732 VLIB_NODE_FN (ip6_lookup_node) (vlib_main_t * vm,
733 vlib_node_runtime_t * node,
734 vlib_frame_t * frame)
736 return ip6_lookup_inline (vm, node, frame);
739 static u8 *format_ip6_lookup_trace (u8 * s, va_list * args);
742 VLIB_REGISTER_NODE (ip6_lookup_node) =
744 .name = "ip6-lookup",
745 .vector_size = sizeof (u32),
746 .format_trace = format_ip6_lookup_trace,
747 .n_next_nodes = IP6_LOOKUP_N_NEXT,
748 .next_nodes = IP6_LOOKUP_NEXT_NODES,
752 VLIB_NODE_FN (ip6_load_balance_node) (vlib_main_t * vm,
753 vlib_node_runtime_t * node,
754 vlib_frame_t * frame)
756 vlib_combined_counter_main_t *cm = &load_balance_main.lbm_via_counters;
758 u32 thread_index = vm->thread_index;
759 ip6_main_t *im = &ip6_main;
760 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs;
761 u16 nexts[VLIB_FRAME_SIZE], *next;
763 from = vlib_frame_vector_args (frame);
764 n_left = frame->n_vectors;
767 vlib_get_buffers (vm, from, bufs, n_left);
771 const load_balance_t *lb0, *lb1;
772 const ip6_header_t *ip0, *ip1;
773 u32 lbi0, hc0, lbi1, hc1;
774 const dpo_id_t *dpo0, *dpo1;
776 /* Prefetch next iteration. */
778 vlib_prefetch_buffer_header (b[2], STORE);
779 vlib_prefetch_buffer_header (b[3], STORE);
781 CLIB_PREFETCH (b[2]->data, sizeof (ip0[0]), STORE);
782 CLIB_PREFETCH (b[3]->data, sizeof (ip0[0]), STORE);
785 ip0 = vlib_buffer_get_current (b[0]);
786 ip1 = vlib_buffer_get_current (b[1]);
787 lbi0 = vnet_buffer (b[0])->ip.adj_index[VLIB_TX];
788 lbi1 = vnet_buffer (b[1])->ip.adj_index[VLIB_TX];
790 lb0 = load_balance_get (lbi0);
791 lb1 = load_balance_get (lbi1);
794 * this node is for via FIBs we can re-use the hash value from the
795 * to node if present.
796 * We don't want to use the same hash value at each level in the recursion
797 * graph as that would lead to polarisation
801 if (PREDICT_FALSE (lb0->lb_n_buckets > 1))
803 if (PREDICT_TRUE (vnet_buffer (b[0])->ip.flow_hash))
805 hc0 = vnet_buffer (b[0])->ip.flow_hash =
806 vnet_buffer (b[0])->ip.flow_hash >> 1;
810 hc0 = vnet_buffer (b[0])->ip.flow_hash =
811 ip6_compute_flow_hash (ip0, lb0->lb_hash_config);
813 dpo0 = load_balance_get_fwd_bucket
814 (lb0, (hc0 & (lb0->lb_n_buckets_minus_1)));
818 dpo0 = load_balance_get_bucket_i (lb0, 0);
820 if (PREDICT_FALSE (lb1->lb_n_buckets > 1))
822 if (PREDICT_TRUE (vnet_buffer (b[1])->ip.flow_hash))
824 hc1 = vnet_buffer (b[1])->ip.flow_hash =
825 vnet_buffer (b[1])->ip.flow_hash >> 1;
829 hc1 = vnet_buffer (b[1])->ip.flow_hash =
830 ip6_compute_flow_hash (ip1, lb1->lb_hash_config);
832 dpo1 = load_balance_get_fwd_bucket
833 (lb1, (hc1 & (lb1->lb_n_buckets_minus_1)));
837 dpo1 = load_balance_get_bucket_i (lb1, 0);
840 next[0] = dpo0->dpoi_next_node;
841 next[1] = dpo1->dpoi_next_node;
843 /* Only process the HBH Option Header if explicitly configured to do so */
844 if (PREDICT_FALSE (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
846 next[0] = (dpo_is_adj (dpo0) && im->hbh_enabled) ?
847 (ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next[0];
849 /* Only process the HBH Option Header if explicitly configured to do so */
850 if (PREDICT_FALSE (ip1->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
852 next[1] = (dpo_is_adj (dpo1) && im->hbh_enabled) ?
853 (ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next[1];
856 vnet_buffer (b[0])->ip.adj_index[VLIB_TX] = dpo0->dpoi_index;
857 vnet_buffer (b[1])->ip.adj_index[VLIB_TX] = dpo1->dpoi_index;
859 vlib_increment_combined_counter
860 (cm, thread_index, lbi0, 1, vlib_buffer_length_in_chain (vm, b[0]));
861 vlib_increment_combined_counter
862 (cm, thread_index, lbi1, 1, vlib_buffer_length_in_chain (vm, b[1]));
871 const load_balance_t *lb0;
872 const ip6_header_t *ip0;
873 const dpo_id_t *dpo0;
876 ip0 = vlib_buffer_get_current (b[0]);
877 lbi0 = vnet_buffer (b[0])->ip.adj_index[VLIB_TX];
879 lb0 = load_balance_get (lbi0);
882 if (PREDICT_FALSE (lb0->lb_n_buckets > 1))
884 if (PREDICT_TRUE (vnet_buffer (b[0])->ip.flow_hash))
886 hc0 = vnet_buffer (b[0])->ip.flow_hash =
887 vnet_buffer (b[0])->ip.flow_hash >> 1;
891 hc0 = vnet_buffer (b[0])->ip.flow_hash =
892 ip6_compute_flow_hash (ip0, lb0->lb_hash_config);
894 dpo0 = load_balance_get_fwd_bucket
895 (lb0, (hc0 & (lb0->lb_n_buckets_minus_1)));
899 dpo0 = load_balance_get_bucket_i (lb0, 0);
902 next[0] = dpo0->dpoi_next_node;
903 vnet_buffer (b[0])->ip.adj_index[VLIB_TX] = dpo0->dpoi_index;
905 /* Only process the HBH Option Header if explicitly configured to do so */
906 if (PREDICT_FALSE (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
908 next[0] = (dpo_is_adj (dpo0) && im->hbh_enabled) ?
909 (ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next[0];
912 vlib_increment_combined_counter
913 (cm, thread_index, lbi0, 1, vlib_buffer_length_in_chain (vm, b[0]));
920 vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors);
922 if (node->flags & VLIB_NODE_FLAG_TRACE)
923 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
925 return frame->n_vectors;
929 VLIB_REGISTER_NODE (ip6_load_balance_node) =
931 .name = "ip6-load-balance",
932 .vector_size = sizeof (u32),
933 .sibling_of = "ip6-lookup",
934 .format_trace = format_ip6_lookup_trace,
940 /* Adjacency taken. */
945 /* Packet data, possibly *after* rewrite. */
946 u8 packet_data[128 - 1 * sizeof (u32)];
948 ip6_forward_next_trace_t;
950 #ifndef CLIB_MARCH_VARIANT
952 format_ip6_forward_next_trace (u8 * s, va_list * args)
954 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
955 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
956 ip6_forward_next_trace_t *t = va_arg (*args, ip6_forward_next_trace_t *);
957 u32 indent = format_get_indent (s);
959 s = format (s, "%Ufib:%d adj:%d flow:%d",
960 format_white_space, indent,
961 t->fib_index, t->adj_index, t->flow_hash);
962 s = format (s, "\n%U%U",
963 format_white_space, indent,
964 format_ip6_header, t->packet_data, sizeof (t->packet_data));
970 format_ip6_lookup_trace (u8 * s, va_list * args)
972 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
973 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
974 ip6_forward_next_trace_t *t = va_arg (*args, ip6_forward_next_trace_t *);
975 u32 indent = format_get_indent (s);
977 s = format (s, "fib %d dpo-idx %d flow hash: 0x%08x",
978 t->fib_index, t->adj_index, t->flow_hash);
979 s = format (s, "\n%U%U",
980 format_white_space, indent,
981 format_ip6_header, t->packet_data, sizeof (t->packet_data));
987 format_ip6_rewrite_trace (u8 * s, va_list * args)
989 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
990 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
991 ip6_forward_next_trace_t *t = va_arg (*args, ip6_forward_next_trace_t *);
992 u32 indent = format_get_indent (s);
994 s = format (s, "tx_sw_if_index %d adj-idx %d : %U flow hash: 0x%08x",
995 t->fib_index, t->adj_index, format_ip_adjacency,
996 t->adj_index, FORMAT_IP_ADJACENCY_NONE, t->flow_hash);
997 s = format (s, "\n%U%U",
998 format_white_space, indent,
999 format_ip_adjacency_packet_data,
1000 t->packet_data, sizeof (t->packet_data));
1004 /* Common trace function for all ip6-forward next nodes. */
1005 #ifndef CLIB_MARCH_VARIANT
1007 ip6_forward_next_trace (vlib_main_t * vm,
1008 vlib_node_runtime_t * node,
1009 vlib_frame_t * frame, vlib_rx_or_tx_t which_adj_index)
1012 ip6_main_t *im = &ip6_main;
1014 n_left = frame->n_vectors;
1015 from = vlib_frame_vector_args (frame);
1020 vlib_buffer_t *b0, *b1;
1021 ip6_forward_next_trace_t *t0, *t1;
1023 /* Prefetch next iteration. */
1024 vlib_prefetch_buffer_with_index (vm, from[2], LOAD);
1025 vlib_prefetch_buffer_with_index (vm, from[3], LOAD);
1030 b0 = vlib_get_buffer (vm, bi0);
1031 b1 = vlib_get_buffer (vm, bi1);
1033 if (b0->flags & VLIB_BUFFER_IS_TRACED)
1035 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
1036 t0->adj_index = vnet_buffer (b0)->ip.adj_index[which_adj_index];
1037 t0->flow_hash = vnet_buffer (b0)->ip.flow_hash;
1039 (vnet_buffer (b0)->sw_if_index[VLIB_TX] !=
1040 (u32) ~ 0) ? vnet_buffer (b0)->sw_if_index[VLIB_TX] :
1041 vec_elt (im->fib_index_by_sw_if_index,
1042 vnet_buffer (b0)->sw_if_index[VLIB_RX]);
1044 clib_memcpy_fast (t0->packet_data,
1045 vlib_buffer_get_current (b0),
1046 sizeof (t0->packet_data));
1048 if (b1->flags & VLIB_BUFFER_IS_TRACED)
1050 t1 = vlib_add_trace (vm, node, b1, sizeof (t1[0]));
1051 t1->adj_index = vnet_buffer (b1)->ip.adj_index[which_adj_index];
1052 t1->flow_hash = vnet_buffer (b1)->ip.flow_hash;
1054 (vnet_buffer (b1)->sw_if_index[VLIB_TX] !=
1055 (u32) ~ 0) ? vnet_buffer (b1)->sw_if_index[VLIB_TX] :
1056 vec_elt (im->fib_index_by_sw_if_index,
1057 vnet_buffer (b1)->sw_if_index[VLIB_RX]);
1059 clib_memcpy_fast (t1->packet_data,
1060 vlib_buffer_get_current (b1),
1061 sizeof (t1->packet_data));
1071 ip6_forward_next_trace_t *t0;
1075 b0 = vlib_get_buffer (vm, bi0);
1077 if (b0->flags & VLIB_BUFFER_IS_TRACED)
1079 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
1080 t0->adj_index = vnet_buffer (b0)->ip.adj_index[which_adj_index];
1081 t0->flow_hash = vnet_buffer (b0)->ip.flow_hash;
1083 (vnet_buffer (b0)->sw_if_index[VLIB_TX] !=
1084 (u32) ~ 0) ? vnet_buffer (b0)->sw_if_index[VLIB_TX] :
1085 vec_elt (im->fib_index_by_sw_if_index,
1086 vnet_buffer (b0)->sw_if_index[VLIB_RX]);
1088 clib_memcpy_fast (t0->packet_data,
1089 vlib_buffer_get_current (b0),
1090 sizeof (t0->packet_data));
1097 /* Compute TCP/UDP/ICMP6 checksum in software. */
1099 ip6_tcp_udp_icmp_compute_checksum (vlib_main_t * vm, vlib_buffer_t * p0,
1100 ip6_header_t * ip0, int *bogus_lengthp)
1103 u16 payload_length, payload_length_host_byte_order;
1105 u32 headers_size = sizeof (ip0[0]);
1106 u8 *data_this_buffer;
1107 u8 next_hdr = ip0->protocol;
1109 ASSERT (bogus_lengthp);
1112 payload_length_host_byte_order = clib_net_to_host_u16 (ip0->payload_length);
1113 data_this_buffer = (u8 *) (ip0 + 1);
1114 payload_length = ip0->payload_length;
1116 /* some icmp packets may come with a "router alert" hop-by-hop extension header (e.g., mldv2 packets)
1117 * or UDP-Ping packets */
1118 if (PREDICT_FALSE (next_hdr == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
1121 ip6_hop_by_hop_ext_t *ext_hdr =
1122 (ip6_hop_by_hop_ext_t *) data_this_buffer;
1124 /* validate really icmp6 next */
1125 ASSERT ((ext_hdr->next_hdr == IP_PROTOCOL_ICMP6)
1126 || (ext_hdr->next_hdr == IP_PROTOCOL_UDP));
1128 skip_bytes = 8 * (1 + ext_hdr->n_data_u64s);
1129 data_this_buffer = (void *) ((u8 *) data_this_buffer + skip_bytes);
1131 payload_length_host_byte_order -= skip_bytes;
1132 headers_size += skip_bytes;
1134 /* pseudo-header adjustments:
1135 * exclude ext header bytes from payload length
1136 * use payload IP proto rather than ext header IP proto
1138 payload_length = clib_host_to_net_u16 (payload_length_host_byte_order);
1139 next_hdr = ext_hdr->next_hdr;
1142 /* Initialize checksum with ip pseudo-header. */
1143 sum0 = payload_length + clib_host_to_net_u16 (next_hdr);
1145 for (i = 0; i < ARRAY_LEN (ip0->src_address.as_uword); i++)
1147 sum0 = ip_csum_with_carry
1148 (sum0, clib_mem_unaligned (&ip0->src_address.as_uword[i], uword));
1149 sum0 = ip_csum_with_carry
1150 (sum0, clib_mem_unaligned (&ip0->dst_address.as_uword[i], uword));
1154 return ip_calculate_l4_checksum (vm, p0, sum0,
1155 payload_length_host_byte_order,
1156 (u8 *) ip0, headers_size, NULL);
1158 return ip_calculate_l4_checksum (vm, 0, sum0,
1159 payload_length_host_byte_order, NULL, 0,
1164 ip6_tcp_udp_icmp_validate_checksum (vlib_main_t * vm, vlib_buffer_t * p0)
1166 ip6_header_t *ip0 = vlib_buffer_get_current (p0);
1171 /* some icmp packets may come with a "router alert" hop-by-hop extension header (e.g., mldv2 packets) */
1172 ASSERT (ip0->protocol == IP_PROTOCOL_TCP
1173 || ip0->protocol == IP_PROTOCOL_ICMP6
1174 || ip0->protocol == IP_PROTOCOL_UDP
1175 || ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS);
1177 udp0 = (void *) (ip0 + 1);
1178 if (ip0->protocol == IP_PROTOCOL_UDP && udp0->checksum == 0)
1180 p0->flags |= (VNET_BUFFER_F_L4_CHECKSUM_COMPUTED
1181 | VNET_BUFFER_F_L4_CHECKSUM_CORRECT);
1185 sum16 = ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip0, &bogus_length);
1187 p0->flags |= (VNET_BUFFER_F_L4_CHECKSUM_COMPUTED
1188 | ((sum16 == 0) << VNET_BUFFER_F_LOG2_L4_CHECKSUM_CORRECT));
1195 * @brief returns number of links on which src is reachable.
1198 ip6_urpf_loose_check (ip6_main_t * im, vlib_buffer_t * b, ip6_header_t * i)
1200 const load_balance_t *lb0;
1204 fib_index = vec_elt (im->fib_index_by_sw_if_index,
1205 vnet_buffer (b)->sw_if_index[VLIB_RX]);
1207 (vnet_buffer (b)->sw_if_index[VLIB_TX] == (u32) ~ 0) ?
1208 fib_index : vnet_buffer (b)->sw_if_index[VLIB_TX];
1210 lbi = ip6_fib_table_fwding_lookup (fib_index, &i->src_address);
1211 lb0 = load_balance_get (lbi);
1213 return (fib_urpf_check_size (lb0->lb_urpf));
1217 ip6_next_proto_is_tcp_udp (vlib_buffer_t * p0, ip6_header_t * ip0,
1221 proto0 = ip6_locate_header (p0, ip0, IP_PROTOCOL_UDP, udp_offset0);
1222 if (proto0 != IP_PROTOCOL_UDP)
1224 proto0 = ip6_locate_header (p0, ip0, IP_PROTOCOL_TCP, udp_offset0);
1225 proto0 = (proto0 == IP_PROTOCOL_TCP) ? proto0 : 0;
1231 VNET_FEATURE_ARC_INIT (ip6_local) =
1233 .arc_name = "ip6-local",
1234 .start_nodes = VNET_FEATURES ("ip6-local"),
1238 static_always_inline u8
1239 ip6_tcp_udp_icmp_bad_length (vlib_main_t * vm, vlib_buffer_t * p0)
1242 u16 payload_length_host_byte_order;
1243 u32 n_this_buffer, n_bytes_left;
1244 ip6_header_t *ip0 = vlib_buffer_get_current (p0);
1245 u32 headers_size = sizeof (ip0[0]);
1246 u8 *data_this_buffer;
1249 data_this_buffer = (u8 *) (ip0 + 1);
1251 ip6_hop_by_hop_ext_t *ext_hdr = (ip6_hop_by_hop_ext_t *) data_this_buffer;
1253 /* validate really icmp6 next */
1255 if (!(ext_hdr->next_hdr == IP_PROTOCOL_ICMP6)
1256 || (ext_hdr->next_hdr == IP_PROTOCOL_UDP))
1260 payload_length_host_byte_order = clib_net_to_host_u16 (ip0->payload_length);
1261 n_bytes_left = n_this_buffer = payload_length_host_byte_order;
1264 u32 n_ip_bytes_this_buffer =
1265 p0->current_length - (((u8 *) ip0 - p0->data) - p0->current_data);
1266 if (n_this_buffer + headers_size > n_ip_bytes_this_buffer)
1268 n_this_buffer = p0->current_length > headers_size ?
1269 n_ip_bytes_this_buffer - headers_size : 0;
1272 n_bytes_left -= n_this_buffer;
1273 n_bytes_left -= p0->total_length_not_including_first_buffer;
1275 if (n_bytes_left == 0)
1283 ip6_local_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
1284 vlib_frame_t * frame, int head_of_feature_arc)
1286 ip6_main_t *im = &ip6_main;
1287 ip_lookup_main_t *lm = &im->lookup_main;
1288 u32 *from, n_left_from;
1289 vlib_node_runtime_t *error_node =
1290 vlib_node_get_runtime (vm, ip6_input_node.index);
1291 u8 arc_index = vnet_feat_arc_ip6_local.feature_arc_index;
1292 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
1293 u16 nexts[VLIB_FRAME_SIZE], *next;
1295 from = vlib_frame_vector_args (frame);
1296 n_left_from = frame->n_vectors;
1298 if (node->flags & VLIB_NODE_FLAG_TRACE)
1299 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
1301 vlib_get_buffers (vm, from, bufs, n_left_from);
1305 while (n_left_from > 2)
1307 /* Prefetch next iteration. */
1308 if (n_left_from >= 6)
1310 vlib_prefetch_buffer_header (b[4], STORE);
1311 vlib_prefetch_buffer_header (b[5], STORE);
1312 vlib_prefetch_buffer_data (b[2], LOAD);
1313 vlib_prefetch_buffer_data (b[3], LOAD);
1316 ip6_error_t error[2];
1317 error[0] = IP6_ERROR_UNKNOWN_PROTOCOL;
1318 error[1] = IP6_ERROR_UNKNOWN_PROTOCOL;
1320 ip6_header_t *ip[2];
1321 ip[0] = vlib_buffer_get_current (b[0]);
1322 ip[1] = vlib_buffer_get_current (b[1]);
1324 if (head_of_feature_arc)
1326 vnet_buffer (b[0])->l3_hdr_offset = b[0]->current_data;
1327 vnet_buffer (b[1])->l3_hdr_offset = b[1]->current_data;
1330 type[0] = lm->builtin_protocol_by_ip_protocol[ip[0]->protocol];
1331 type[1] = lm->builtin_protocol_by_ip_protocol[ip[1]->protocol];
1334 flags[0] = b[0]->flags;
1335 flags[1] = b[1]->flags;
1337 vnet_buffer_oflags_t oflags[2];
1338 oflags[0] = vnet_buffer (b[0])->oflags;
1339 oflags[1] = vnet_buffer (b[1])->oflags;
1342 l4_offload[0] = (flags[0] & VNET_BUFFER_F_OFFLOAD) &&
1343 (oflags[0] & (VNET_BUFFER_OFFLOAD_F_TCP_CKSUM |
1344 VNET_BUFFER_OFFLOAD_F_UDP_CKSUM));
1345 l4_offload[1] = (flags[1] & VNET_BUFFER_F_OFFLOAD) &&
1346 (oflags[1] & (VNET_BUFFER_OFFLOAD_F_TCP_CKSUM |
1347 VNET_BUFFER_OFFLOAD_F_UDP_CKSUM));
1349 u32 good_l4_csum[2];
1351 (flags[0] & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) | l4_offload[0];
1353 (flags[1] & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) | l4_offload[1];
1355 u32 udp_offset[2] = { };
1358 ip6_next_proto_is_tcp_udp (b[0], ip[0], &udp_offset[0]);
1360 ip6_next_proto_is_tcp_udp (b[1], ip[1], &udp_offset[1]);
1361 i16 len_diff[2] = { 0 };
1362 if (PREDICT_TRUE (is_tcp_udp[0]))
1365 (udp_header_t *) ((u8 *) ip[0] + udp_offset[0]);
1366 good_l4_csum[0] |= type[0] == IP_BUILTIN_PROTOCOL_UDP
1367 && udp->checksum == 0;
1368 /* optimistically verify UDP length. */
1369 u16 ip_len, udp_len;
1370 ip_len = clib_net_to_host_u16 (ip[0]->payload_length);
1371 udp_len = clib_net_to_host_u16 (udp->length);
1372 len_diff[0] = ip_len - udp_len;
1374 if (PREDICT_TRUE (is_tcp_udp[1]))
1377 (udp_header_t *) ((u8 *) ip[1] + udp_offset[1]);
1378 good_l4_csum[1] |= type[1] == IP_BUILTIN_PROTOCOL_UDP
1379 && udp->checksum == 0;
1380 /* optimistically verify UDP length. */
1381 u16 ip_len, udp_len;
1382 ip_len = clib_net_to_host_u16 (ip[1]->payload_length);
1383 udp_len = clib_net_to_host_u16 (udp->length);
1384 len_diff[1] = ip_len - udp_len;
1387 good_l4_csum[0] |= type[0] == IP_BUILTIN_PROTOCOL_UNKNOWN;
1388 good_l4_csum[1] |= type[1] == IP_BUILTIN_PROTOCOL_UNKNOWN;
1390 len_diff[0] = type[0] == IP_BUILTIN_PROTOCOL_UDP ? len_diff[0] : 0;
1391 len_diff[1] = type[1] == IP_BUILTIN_PROTOCOL_UDP ? len_diff[1] : 0;
1394 need_csum[0] = type[0] != IP_BUILTIN_PROTOCOL_UNKNOWN
1396 && !(flags[0] & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED);
1397 need_csum[1] = type[1] != IP_BUILTIN_PROTOCOL_UNKNOWN
1399 && !(flags[1] & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED);
1400 if (PREDICT_FALSE (need_csum[0]))
1402 flags[0] = ip6_tcp_udp_icmp_validate_checksum (vm, b[0]);
1403 good_l4_csum[0] = flags[0] & VNET_BUFFER_F_L4_CHECKSUM_CORRECT;
1404 error[0] = IP6_ERROR_UNKNOWN_PROTOCOL;
1408 if (ip6_tcp_udp_icmp_bad_length (vm, b[0]))
1409 error[0] = IP6_ERROR_BAD_LENGTH;
1411 if (PREDICT_FALSE (need_csum[1]))
1413 flags[1] = ip6_tcp_udp_icmp_validate_checksum (vm, b[1]);
1414 good_l4_csum[1] = flags[1] & VNET_BUFFER_F_L4_CHECKSUM_CORRECT;
1415 error[1] = IP6_ERROR_UNKNOWN_PROTOCOL;
1419 if (ip6_tcp_udp_icmp_bad_length (vm, b[1]))
1420 error[1] = IP6_ERROR_BAD_LENGTH;
1424 error[0] = len_diff[0] < 0 ? IP6_ERROR_UDP_LENGTH : error[0];
1426 error[1] = len_diff[1] < 0 ? IP6_ERROR_UDP_LENGTH : error[1];
1428 STATIC_ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_UDP ==
1429 IP6_ERROR_UDP_CHECKSUM,
1430 "Wrong IP6 errors constants");
1431 STATIC_ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_ICMP ==
1432 IP6_ERROR_ICMP_CHECKSUM,
1433 "Wrong IP6 errors constants");
1436 !good_l4_csum[0] ? IP6_ERROR_UDP_CHECKSUM + type[0] : error[0];
1438 !good_l4_csum[1] ? IP6_ERROR_UDP_CHECKSUM + type[1] : error[1];
1440 /* Drop packets from unroutable hosts. */
1441 /* If this is a neighbor solicitation (ICMP), skip source RPF check */
1443 unroutable[0] = error[0] == IP6_ERROR_UNKNOWN_PROTOCOL
1444 && type[0] != IP_BUILTIN_PROTOCOL_ICMP
1445 && !ip6_address_is_link_local_unicast (&ip[0]->src_address);
1446 unroutable[1] = error[1] == IP6_ERROR_UNKNOWN_PROTOCOL
1447 && type[1] != IP_BUILTIN_PROTOCOL_ICMP
1448 && !ip6_address_is_link_local_unicast (&ip[1]->src_address);
1449 if (PREDICT_FALSE (unroutable[0]))
1452 !ip6_urpf_loose_check (im, b[0],
1453 ip[0]) ? IP6_ERROR_SRC_LOOKUP_MISS
1456 if (PREDICT_FALSE (unroutable[1]))
1459 !ip6_urpf_loose_check (im, b[1],
1460 ip[1]) ? IP6_ERROR_SRC_LOOKUP_MISS
1464 vnet_buffer (b[0])->ip.fib_index =
1465 vnet_buffer (b[0])->sw_if_index[VLIB_TX] != ~0 ?
1466 vnet_buffer (b[0])->sw_if_index[VLIB_TX] :
1467 vnet_buffer (b[0])->ip.fib_index;
1468 vnet_buffer (b[1])->ip.fib_index =
1469 vnet_buffer (b[1])->sw_if_index[VLIB_TX] != ~0 ?
1470 vnet_buffer (b[1])->sw_if_index[VLIB_TX] :
1471 vnet_buffer (b[1])->ip.fib_index;
1472 } /* head_of_feature_arc */
1474 next[0] = lm->local_next_by_ip_protocol[ip[0]->protocol];
1476 error[0] != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next[0];
1477 next[1] = lm->local_next_by_ip_protocol[ip[1]->protocol];
1479 error[1] != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next[1];
1481 b[0]->error = error_node->errors[error[0]];
1482 b[1]->error = error_node->errors[error[1]];
1484 if (head_of_feature_arc)
1487 ip6_unknown[0] = error[0] == (u8) IP6_ERROR_UNKNOWN_PROTOCOL;
1488 ip6_unknown[1] = error[1] == (u8) IP6_ERROR_UNKNOWN_PROTOCOL;
1489 if (PREDICT_TRUE (ip6_unknown[0]))
1491 u32 next32 = next[0];
1492 vnet_feature_arc_start (arc_index,
1493 vnet_buffer (b[0])->sw_if_index
1494 [VLIB_RX], &next32, b[0]);
1497 if (PREDICT_TRUE (ip6_unknown[1]))
1499 u32 next32 = next[1];
1500 vnet_feature_arc_start (arc_index,
1501 vnet_buffer (b[1])->sw_if_index
1502 [VLIB_RX], &next32, b[1]);
1516 error = IP6_ERROR_UNKNOWN_PROTOCOL;
1519 ip = vlib_buffer_get_current (b[0]);
1521 if (head_of_feature_arc)
1523 vnet_buffer (b[0])->l3_hdr_offset = b[0]->current_data;
1524 u8 type = lm->builtin_protocol_by_ip_protocol[ip->protocol];
1526 u32 flags = b[0]->flags;
1528 vnet_buffer_oflags_t oflags = vnet_buffer (b[0])->oflags;
1530 u32 l4_offload = (flags & VNET_BUFFER_F_OFFLOAD) &&
1531 (oflags & (VNET_BUFFER_OFFLOAD_F_TCP_CKSUM |
1532 VNET_BUFFER_OFFLOAD_F_UDP_CKSUM));
1535 (flags & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) | l4_offload;
1538 u8 is_tcp_udp = ip6_next_proto_is_tcp_udp (b[0], ip, &udp_offset);
1539 if (PREDICT_TRUE (is_tcp_udp))
1541 udp_header_t *udp = (udp_header_t *) ((u8 *) ip + udp_offset);
1542 /* Don't verify UDP checksum for packets with explicit zero checksum. */
1543 good_l4_csum |= type == IP_BUILTIN_PROTOCOL_UDP
1544 && udp->checksum == 0;
1545 /* optimistically verify UDP length. */
1546 u16 ip_len, udp_len;
1547 ip_len = clib_net_to_host_u16 (ip->payload_length);
1548 udp_len = clib_net_to_host_u16 (udp->length);
1549 len_diff = ip_len - udp_len;
1552 good_l4_csum |= type == IP_BUILTIN_PROTOCOL_UNKNOWN;
1553 len_diff = type == IP_BUILTIN_PROTOCOL_UDP ? len_diff : 0;
1555 u8 need_csum = type != IP_BUILTIN_PROTOCOL_UNKNOWN &&
1557 !(flags & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED);
1558 if (PREDICT_FALSE (need_csum))
1560 flags = ip6_tcp_udp_icmp_validate_checksum (vm, b[0]);
1561 good_l4_csum = flags & VNET_BUFFER_F_L4_CHECKSUM_CORRECT;
1562 error = IP6_ERROR_UNKNOWN_PROTOCOL;
1566 if (ip6_tcp_udp_icmp_bad_length (vm, b[0]))
1567 error = IP6_ERROR_BAD_LENGTH;
1572 error = len_diff < 0 ? IP6_ERROR_UDP_LENGTH : error;
1573 STATIC_ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_UDP ==
1574 IP6_ERROR_UDP_CHECKSUM,
1575 "Wrong IP6 errors constants");
1576 STATIC_ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_ICMP ==
1577 IP6_ERROR_ICMP_CHECKSUM,
1578 "Wrong IP6 errors constants");
1580 error = !good_l4_csum ? IP6_ERROR_UDP_CHECKSUM + type : error;
1582 /* Drop packets from unroutable hosts. */
1583 /* If this is a neighbor solicitation (ICMP), skip source RPF check */
1584 u8 unroutable = error == IP6_ERROR_UNKNOWN_PROTOCOL
1585 && type != IP_BUILTIN_PROTOCOL_ICMP
1586 && !ip6_address_is_link_local_unicast (&ip->src_address);
1587 if (PREDICT_FALSE (unroutable))
1590 !ip6_urpf_loose_check (im, b[0],
1591 ip) ? IP6_ERROR_SRC_LOOKUP_MISS :
1595 vnet_buffer (b[0])->ip.fib_index =
1596 vnet_buffer (b[0])->sw_if_index[VLIB_TX] != ~0 ?
1597 vnet_buffer (b[0])->sw_if_index[VLIB_TX] :
1598 vnet_buffer (b[0])->ip.fib_index;
1599 } /* head_of_feature_arc */
1601 next[0] = lm->local_next_by_ip_protocol[ip->protocol];
1603 error != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next[0];
1605 b[0]->error = error_node->errors[error];
1607 if (head_of_feature_arc)
1609 if (PREDICT_TRUE (error == (u8) IP6_ERROR_UNKNOWN_PROTOCOL))
1611 u32 next32 = next[0];
1612 vnet_feature_arc_start (arc_index,
1613 vnet_buffer (b[0])->sw_if_index
1614 [VLIB_RX], &next32, b[0]);
1625 vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors);
1626 return frame->n_vectors;
1629 VLIB_NODE_FN (ip6_local_node) (vlib_main_t * vm, vlib_node_runtime_t * node,
1630 vlib_frame_t * frame)
1632 return ip6_local_inline (vm, node, frame, 1 /* head of feature arc */ );
1636 VLIB_REGISTER_NODE (ip6_local_node) =
1638 .name = "ip6-local",
1639 .vector_size = sizeof (u32),
1640 .format_trace = format_ip6_forward_next_trace,
1641 .n_next_nodes = IP_LOCAL_N_NEXT,
1644 [IP_LOCAL_NEXT_DROP] = "ip6-drop",
1645 [IP_LOCAL_NEXT_PUNT] = "ip6-punt",
1646 [IP_LOCAL_NEXT_UDP_LOOKUP] = "ip6-udp-lookup",
1647 [IP_LOCAL_NEXT_ICMP] = "ip6-icmp-input",
1648 [IP_LOCAL_NEXT_REASSEMBLY] = "ip6-full-reassembly",
1653 VLIB_NODE_FN (ip6_local_end_of_arc_node) (vlib_main_t * vm,
1654 vlib_node_runtime_t * node,
1655 vlib_frame_t * frame)
1657 return ip6_local_inline (vm, node, frame, 0 /* head of feature arc */ );
1661 VLIB_REGISTER_NODE (ip6_local_end_of_arc_node) = {
1662 .name = "ip6-local-end-of-arc",
1663 .vector_size = sizeof (u32),
1665 .format_trace = format_ip6_forward_next_trace,
1666 .sibling_of = "ip6-local",
1669 VNET_FEATURE_INIT (ip6_local_end_of_arc, static) = {
1670 .arc_name = "ip6-local",
1671 .node_name = "ip6-local-end-of-arc",
1672 .runs_before = 0, /* not before any other features */
1676 #ifdef CLIB_MARCH_VARIANT
1677 extern vlib_node_registration_t ip6_local_node;
1680 ip6_register_protocol (u32 protocol, u32 node_index)
1682 vlib_main_t *vm = vlib_get_main ();
1683 ip6_main_t *im = &ip6_main;
1684 ip_lookup_main_t *lm = &im->lookup_main;
1686 ASSERT (protocol < ARRAY_LEN (lm->local_next_by_ip_protocol));
1687 lm->local_next_by_ip_protocol[protocol] =
1688 vlib_node_add_next (vm, ip6_local_node.index, node_index);
1692 ip6_unregister_protocol (u32 protocol)
1694 ip6_main_t *im = &ip6_main;
1695 ip_lookup_main_t *lm = &im->lookup_main;
1697 ASSERT (protocol < ARRAY_LEN (lm->local_next_by_ip_protocol));
1698 lm->local_next_by_ip_protocol[protocol] = IP_LOCAL_NEXT_PUNT;
1704 IP6_REWRITE_NEXT_DROP,
1705 IP6_REWRITE_NEXT_ICMP_ERROR,
1706 IP6_REWRITE_NEXT_FRAGMENT,
1707 IP6_REWRITE_N_NEXT /* Last */
1708 } ip6_rewrite_next_t;
1711 * This bits of an IPv6 address to mask to construct a multicast
1714 #define IP6_MCAST_ADDR_MASK 0xffffffff
1717 ip6_mtu_check (vlib_buffer_t * b, u16 packet_bytes,
1718 u16 adj_packet_bytes, bool is_locally_generated,
1719 u32 * next, u8 is_midchain, u32 * error)
1721 if (adj_packet_bytes >= 1280 && packet_bytes > adj_packet_bytes)
1723 if (is_locally_generated)
1725 /* IP fragmentation */
1726 ip_frag_set_vnet_buffer (b, adj_packet_bytes,
1728 IP_FRAG_NEXT_IP_REWRITE_MIDCHAIN :
1729 IP_FRAG_NEXT_IP_REWRITE), 0);
1730 *next = IP6_REWRITE_NEXT_FRAGMENT;
1731 *error = IP6_ERROR_MTU_EXCEEDED;
1735 *error = IP6_ERROR_MTU_EXCEEDED;
1736 icmp6_error_set_vnet_buffer (b, ICMP6_packet_too_big, 0,
1738 *next = IP6_REWRITE_NEXT_ICMP_ERROR;
1744 ip6_rewrite_inline_with_gso (vlib_main_t * vm,
1745 vlib_node_runtime_t * node,
1746 vlib_frame_t * frame,
1747 int do_counters, int is_midchain, int is_mcast)
1749 ip_lookup_main_t *lm = &ip6_main.lookup_main;
1750 u32 *from = vlib_frame_vector_args (frame);
1751 u32 n_left_from, n_left_to_next, *to_next, next_index;
1752 vlib_node_runtime_t *error_node =
1753 vlib_node_get_runtime (vm, ip6_input_node.index);
1755 n_left_from = frame->n_vectors;
1756 next_index = node->cached_next_index;
1757 u32 thread_index = vm->thread_index;
1759 while (n_left_from > 0)
1761 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1763 while (n_left_from >= 4 && n_left_to_next >= 2)
1765 const ip_adjacency_t *adj0, *adj1;
1766 vlib_buffer_t *p0, *p1;
1767 ip6_header_t *ip0, *ip1;
1768 u32 pi0, rw_len0, next0, error0, adj_index0;
1769 u32 pi1, rw_len1, next1, error1, adj_index1;
1770 u32 tx_sw_if_index0, tx_sw_if_index1;
1771 bool is_locally_originated0, is_locally_originated1;
1773 /* Prefetch next iteration. */
1775 vlib_buffer_t *p2, *p3;
1777 p2 = vlib_get_buffer (vm, from[2]);
1778 p3 = vlib_get_buffer (vm, from[3]);
1780 vlib_prefetch_buffer_header (p2, LOAD);
1781 vlib_prefetch_buffer_header (p3, LOAD);
1783 clib_prefetch_store (p2->pre_data);
1784 clib_prefetch_store (p3->pre_data);
1786 CLIB_PREFETCH (p2->data, sizeof (ip0[0]), STORE);
1787 CLIB_PREFETCH (p3->data, sizeof (ip0[0]), STORE);
1790 pi0 = to_next[0] = from[0];
1791 pi1 = to_next[1] = from[1];
1796 n_left_to_next -= 2;
1798 p0 = vlib_get_buffer (vm, pi0);
1799 p1 = vlib_get_buffer (vm, pi1);
1801 adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
1802 adj_index1 = vnet_buffer (p1)->ip.adj_index[VLIB_TX];
1804 ip0 = vlib_buffer_get_current (p0);
1805 ip1 = vlib_buffer_get_current (p1);
1807 error0 = error1 = IP6_ERROR_NONE;
1808 next0 = next1 = IP6_REWRITE_NEXT_DROP;
1810 is_locally_originated0 =
1811 p0->flags & VNET_BUFFER_F_LOCALLY_ORIGINATED;
1812 if (PREDICT_TRUE (!is_locally_originated0))
1814 i32 hop_limit0 = ip0->hop_limit;
1816 /* Input node should have reject packets with hop limit 0. */
1817 ASSERT (ip0->hop_limit > 0);
1821 ip0->hop_limit = hop_limit0;
1824 * If the hop count drops below 1 when forwarding, generate
1827 if (PREDICT_FALSE (hop_limit0 <= 0))
1829 error0 = IP6_ERROR_TIME_EXPIRED;
1830 next0 = IP6_REWRITE_NEXT_ICMP_ERROR;
1831 vnet_buffer (p0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
1832 icmp6_error_set_vnet_buffer (p0, ICMP6_time_exceeded,
1833 ICMP6_time_exceeded_ttl_exceeded_in_transit,
1838 is_locally_originated1 =
1839 p1->flags & VNET_BUFFER_F_LOCALLY_ORIGINATED;
1840 if (PREDICT_TRUE (!is_locally_originated1))
1842 i32 hop_limit1 = ip1->hop_limit;
1844 /* Input node should have reject packets with hop limit 0. */
1845 ASSERT (ip1->hop_limit > 0);
1849 ip1->hop_limit = hop_limit1;
1852 * If the hop count drops below 1 when forwarding, generate
1855 if (PREDICT_FALSE (hop_limit1 <= 0))
1857 error1 = IP6_ERROR_TIME_EXPIRED;
1858 next1 = IP6_REWRITE_NEXT_ICMP_ERROR;
1859 vnet_buffer (p1)->sw_if_index[VLIB_TX] = (u32) ~ 0;
1860 icmp6_error_set_vnet_buffer (p1, ICMP6_time_exceeded,
1861 ICMP6_time_exceeded_ttl_exceeded_in_transit,
1866 adj0 = adj_get (adj_index0);
1867 adj1 = adj_get (adj_index1);
1869 rw_len0 = adj0[0].rewrite_header.data_bytes;
1870 rw_len1 = adj1[0].rewrite_header.data_bytes;
1871 vnet_buffer (p0)->ip.save_rewrite_length = rw_len0;
1872 vnet_buffer (p1)->ip.save_rewrite_length = rw_len1;
1876 vlib_increment_combined_counter
1877 (&adjacency_counters,
1878 thread_index, adj_index0, 1,
1879 vlib_buffer_length_in_chain (vm, p0) + rw_len0);
1880 vlib_increment_combined_counter
1881 (&adjacency_counters,
1882 thread_index, adj_index1, 1,
1883 vlib_buffer_length_in_chain (vm, p1) + rw_len1);
1886 /* Check MTU of outgoing interface. */
1888 clib_net_to_host_u16 (ip0->payload_length) +
1889 sizeof (ip6_header_t);
1891 clib_net_to_host_u16 (ip1->payload_length) +
1892 sizeof (ip6_header_t);
1893 if (p0->flags & VNET_BUFFER_F_GSO)
1894 ip0_len = gso_mtu_sz (p0);
1895 if (p1->flags & VNET_BUFFER_F_GSO)
1896 ip1_len = gso_mtu_sz (p1);
1898 ip6_mtu_check (p0, ip0_len,
1899 adj0[0].rewrite_header.max_l3_packet_bytes,
1900 is_locally_originated0, &next0, is_midchain,
1902 ip6_mtu_check (p1, ip1_len,
1903 adj1[0].rewrite_header.max_l3_packet_bytes,
1904 is_locally_originated1, &next1, is_midchain,
1906 /* Don't adjust the buffer for hop count issue; icmp-error node
1907 * wants to see the IP header */
1908 if (PREDICT_TRUE (error0 == IP6_ERROR_NONE))
1910 p0->current_data -= rw_len0;
1911 p0->current_length += rw_len0;
1912 tx_sw_if_index0 = adj0[0].rewrite_header.sw_if_index;
1913 vnet_buffer (p0)->sw_if_index[VLIB_TX] = tx_sw_if_index0;
1914 next0 = adj0[0].rewrite_header.next_index;
1916 (adj0[0].rewrite_header.flags & VNET_REWRITE_HAS_FEATURES))
1917 vnet_feature_arc_start_w_cfg_index
1918 (lm->output_feature_arc_index, tx_sw_if_index0, &next0, p0,
1919 adj0->ia_cfg_index);
1923 p0->error = error_node->errors[error0];
1925 if (PREDICT_TRUE (error1 == IP6_ERROR_NONE))
1927 p1->current_data -= rw_len1;
1928 p1->current_length += rw_len1;
1930 tx_sw_if_index1 = adj1[0].rewrite_header.sw_if_index;
1931 vnet_buffer (p1)->sw_if_index[VLIB_TX] = tx_sw_if_index1;
1932 next1 = adj1[0].rewrite_header.next_index;
1935 (adj1[0].rewrite_header.flags & VNET_REWRITE_HAS_FEATURES))
1936 vnet_feature_arc_start_w_cfg_index
1937 (lm->output_feature_arc_index, tx_sw_if_index1, &next1, p1,
1938 adj1->ia_cfg_index);
1942 p1->error = error_node->errors[error1];
1947 /* before we paint on the next header, update the L4
1948 * checksums if required, since there's no offload on a tunnel */
1949 vnet_calc_checksums_inline (vm, p0, 0 /* is_ip4 */ ,
1951 vnet_calc_checksums_inline (vm, p1, 0 /* is_ip4 */ ,
1954 /* Guess we are only writing on ipv6 header. */
1955 vnet_rewrite_two_headers (adj0[0], adj1[0],
1956 ip0, ip1, sizeof (ip6_header_t));
1959 /* Guess we are only writing on simple Ethernet header. */
1960 vnet_rewrite_two_headers (adj0[0], adj1[0],
1961 ip0, ip1, sizeof (ethernet_header_t));
1965 if (adj0->sub_type.midchain.fixup_func)
1966 adj0->sub_type.midchain.fixup_func
1967 (vm, adj0, p0, adj0->sub_type.midchain.fixup_data);
1968 if (adj1->sub_type.midchain.fixup_func)
1969 adj1->sub_type.midchain.fixup_func
1970 (vm, adj1, p1, adj1->sub_type.midchain.fixup_data);
1975 * copy bytes from the IP address into the MAC rewrite
1977 vnet_ip_mcast_fixup_header (IP6_MCAST_ADDR_MASK,
1979 rewrite_header.dst_mcast_offset,
1980 &ip0->dst_address.as_u32[3],
1982 vnet_ip_mcast_fixup_header (IP6_MCAST_ADDR_MASK,
1984 rewrite_header.dst_mcast_offset,
1985 &ip1->dst_address.as_u32[3],
1989 vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
1990 to_next, n_left_to_next,
1991 pi0, pi1, next0, next1);
1994 while (n_left_from > 0 && n_left_to_next > 0)
1996 ip_adjacency_t *adj0;
2000 u32 adj_index0, next0, error0;
2001 u32 tx_sw_if_index0;
2002 bool is_locally_originated0;
2004 pi0 = to_next[0] = from[0];
2006 p0 = vlib_get_buffer (vm, pi0);
2008 adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
2010 adj0 = adj_get (adj_index0);
2012 ip0 = vlib_buffer_get_current (p0);
2014 error0 = IP6_ERROR_NONE;
2015 next0 = IP6_REWRITE_NEXT_DROP;
2017 /* Check hop limit */
2018 is_locally_originated0 =
2019 p0->flags & VNET_BUFFER_F_LOCALLY_ORIGINATED;
2020 if (PREDICT_TRUE (!is_locally_originated0))
2022 i32 hop_limit0 = ip0->hop_limit;
2024 ASSERT (ip0->hop_limit > 0);
2028 ip0->hop_limit = hop_limit0;
2030 if (PREDICT_FALSE (hop_limit0 <= 0))
2033 * If the hop count drops below 1 when forwarding, generate
2036 error0 = IP6_ERROR_TIME_EXPIRED;
2037 next0 = IP6_REWRITE_NEXT_ICMP_ERROR;
2038 vnet_buffer (p0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
2039 icmp6_error_set_vnet_buffer (p0, ICMP6_time_exceeded,
2040 ICMP6_time_exceeded_ttl_exceeded_in_transit,
2047 vnet_calc_checksums_inline (vm, p0, 0 /* is_ip4 */ ,
2050 /* Guess we are only writing on ip6 header. */
2051 vnet_rewrite_one_header (adj0[0], ip0, sizeof (ip6_header_t));
2054 /* Guess we are only writing on simple Ethernet header. */
2055 vnet_rewrite_one_header (adj0[0], ip0,
2056 sizeof (ethernet_header_t));
2058 /* Update packet buffer attributes/set output interface. */
2059 rw_len0 = adj0[0].rewrite_header.data_bytes;
2060 vnet_buffer (p0)->ip.save_rewrite_length = rw_len0;
2064 vlib_increment_combined_counter
2065 (&adjacency_counters,
2066 thread_index, adj_index0, 1,
2067 vlib_buffer_length_in_chain (vm, p0) + rw_len0);
2070 /* Check MTU of outgoing interface. */
2072 clib_net_to_host_u16 (ip0->payload_length) +
2073 sizeof (ip6_header_t);
2074 if (p0->flags & VNET_BUFFER_F_GSO)
2075 ip0_len = gso_mtu_sz (p0);
2077 ip6_mtu_check (p0, ip0_len,
2078 adj0[0].rewrite_header.max_l3_packet_bytes,
2079 is_locally_originated0, &next0, is_midchain,
2081 /* Don't adjust the buffer for hop count issue; icmp-error node
2082 * wants to see the IP header */
2083 if (PREDICT_TRUE (error0 == IP6_ERROR_NONE))
2085 p0->current_data -= rw_len0;
2086 p0->current_length += rw_len0;
2088 tx_sw_if_index0 = adj0[0].rewrite_header.sw_if_index;
2090 vnet_buffer (p0)->sw_if_index[VLIB_TX] = tx_sw_if_index0;
2091 next0 = adj0[0].rewrite_header.next_index;
2094 (adj0[0].rewrite_header.flags & VNET_REWRITE_HAS_FEATURES))
2095 vnet_feature_arc_start_w_cfg_index
2096 (lm->output_feature_arc_index, tx_sw_if_index0, &next0, p0,
2097 adj0->ia_cfg_index);
2101 p0->error = error_node->errors[error0];
2106 if (adj0->sub_type.midchain.fixup_func)
2107 adj0->sub_type.midchain.fixup_func
2108 (vm, adj0, p0, adj0->sub_type.midchain.fixup_data);
2112 vnet_ip_mcast_fixup_header (IP6_MCAST_ADDR_MASK,
2114 rewrite_header.dst_mcast_offset,
2115 &ip0->dst_address.as_u32[3],
2122 n_left_to_next -= 1;
2124 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
2125 to_next, n_left_to_next,
2129 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2132 /* Need to do trace after rewrites to pick up new packet data. */
2133 if (node->flags & VLIB_NODE_FLAG_TRACE)
2134 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
2136 return frame->n_vectors;
2140 ip6_rewrite_inline (vlib_main_t * vm,
2141 vlib_node_runtime_t * node,
2142 vlib_frame_t * frame,
2143 int do_counters, int is_midchain, int is_mcast)
2145 return ip6_rewrite_inline_with_gso (vm, node, frame, do_counters,
2146 is_midchain, is_mcast);
2149 VLIB_NODE_FN (ip6_rewrite_node) (vlib_main_t * vm,
2150 vlib_node_runtime_t * node,
2151 vlib_frame_t * frame)
2153 if (adj_are_counters_enabled ())
2154 return ip6_rewrite_inline (vm, node, frame, 1, 0, 0);
2156 return ip6_rewrite_inline (vm, node, frame, 0, 0, 0);
2159 VLIB_NODE_FN (ip6_rewrite_bcast_node) (vlib_main_t * vm,
2160 vlib_node_runtime_t * node,
2161 vlib_frame_t * frame)
2163 if (adj_are_counters_enabled ())
2164 return ip6_rewrite_inline (vm, node, frame, 1, 0, 0);
2166 return ip6_rewrite_inline (vm, node, frame, 0, 0, 0);
2169 VLIB_NODE_FN (ip6_rewrite_mcast_node) (vlib_main_t * vm,
2170 vlib_node_runtime_t * node,
2171 vlib_frame_t * frame)
2173 if (adj_are_counters_enabled ())
2174 return ip6_rewrite_inline (vm, node, frame, 1, 0, 1);
2176 return ip6_rewrite_inline (vm, node, frame, 0, 0, 1);
2179 VLIB_NODE_FN (ip6_midchain_node) (vlib_main_t * vm,
2180 vlib_node_runtime_t * node,
2181 vlib_frame_t * frame)
2183 if (adj_are_counters_enabled ())
2184 return ip6_rewrite_inline (vm, node, frame, 1, 1, 0);
2186 return ip6_rewrite_inline (vm, node, frame, 0, 1, 0);
2189 VLIB_NODE_FN (ip6_mcast_midchain_node) (vlib_main_t * vm,
2190 vlib_node_runtime_t * node,
2191 vlib_frame_t * frame)
2193 if (adj_are_counters_enabled ())
2194 return ip6_rewrite_inline (vm, node, frame, 1, 1, 1);
2196 return ip6_rewrite_inline (vm, node, frame, 0, 1, 1);
2200 VLIB_REGISTER_NODE (ip6_midchain_node) =
2202 .name = "ip6-midchain",
2203 .vector_size = sizeof (u32),
2204 .format_trace = format_ip6_forward_next_trace,
2205 .sibling_of = "ip6-rewrite",
2208 VLIB_REGISTER_NODE (ip6_rewrite_node) =
2210 .name = "ip6-rewrite",
2211 .vector_size = sizeof (u32),
2212 .format_trace = format_ip6_rewrite_trace,
2213 .n_next_nodes = IP6_REWRITE_N_NEXT,
2216 [IP6_REWRITE_NEXT_DROP] = "ip6-drop",
2217 [IP6_REWRITE_NEXT_ICMP_ERROR] = "ip6-icmp-error",
2218 [IP6_REWRITE_NEXT_FRAGMENT] = "ip6-frag",
2222 VLIB_REGISTER_NODE (ip6_rewrite_bcast_node) = {
2223 .name = "ip6-rewrite-bcast",
2224 .vector_size = sizeof (u32),
2226 .format_trace = format_ip6_rewrite_trace,
2227 .sibling_of = "ip6-rewrite",
2230 VLIB_REGISTER_NODE (ip6_rewrite_mcast_node) =
2232 .name = "ip6-rewrite-mcast",
2233 .vector_size = sizeof (u32),
2234 .format_trace = format_ip6_rewrite_trace,
2235 .sibling_of = "ip6-rewrite",
2239 VLIB_REGISTER_NODE (ip6_mcast_midchain_node) =
2241 .name = "ip6-mcast-midchain",
2242 .vector_size = sizeof (u32),
2243 .format_trace = format_ip6_rewrite_trace,
2244 .sibling_of = "ip6-rewrite",
2250 * Hop-by-Hop handling
2252 #ifndef CLIB_MARCH_VARIANT
2253 ip6_hop_by_hop_main_t ip6_hop_by_hop_main;
2254 #endif /* CLIB_MARCH_VARIANT */
2256 #define foreach_ip6_hop_by_hop_error \
2257 _(PROCESSED, "pkts with ip6 hop-by-hop options") \
2258 _(FORMAT, "incorrectly formatted hop-by-hop options") \
2259 _(UNKNOWN_OPTION, "unknown ip6 hop-by-hop options")
2264 #define _(sym,str) IP6_HOP_BY_HOP_ERROR_##sym,
2265 foreach_ip6_hop_by_hop_error
2267 IP6_HOP_BY_HOP_N_ERROR,
2268 } ip6_hop_by_hop_error_t;
2272 * Primary h-b-h handler trace support
2273 * We work pretty hard on the problem for obvious reasons
2279 u8 option_data[256];
2280 } ip6_hop_by_hop_trace_t;
2282 extern vlib_node_registration_t ip6_hop_by_hop_node;
2284 static char *ip6_hop_by_hop_error_strings[] = {
2285 #define _(sym,string) string,
2286 foreach_ip6_hop_by_hop_error
2290 #ifndef CLIB_MARCH_VARIANT
2292 format_ip6_hop_by_hop_ext_hdr (u8 * s, va_list * args)
2294 ip6_hop_by_hop_header_t *hbh0 = va_arg (*args, ip6_hop_by_hop_header_t *);
2295 int total_len = va_arg (*args, int);
2296 ip6_hop_by_hop_option_t *opt0, *limit0;
2297 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2299 s = format (s, "IP6_HOP_BY_HOP: next protocol %d len %d total %d",
2300 hbh0->protocol, (hbh0->length + 1) << 3, total_len);
2302 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2303 limit0 = (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 + total_len);
2305 while (opt0 < limit0)
2310 case 0: /* Pad, just stop */
2311 opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0 + 1);
2315 if (hm->trace[type0])
2317 s = (*hm->trace[type0]) (s, opt0);
2321 s = format (s, "\n unrecognized option %d length %d", type0,
2325 (ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length +
2326 sizeof (ip6_hop_by_hop_option_t));
2335 format_ip6_hop_by_hop_trace (u8 * s, va_list * args)
2337 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
2338 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
2339 ip6_hop_by_hop_trace_t *t = va_arg (*args, ip6_hop_by_hop_trace_t *);
2340 ip6_hop_by_hop_header_t *hbh0;
2341 ip6_hop_by_hop_option_t *opt0, *limit0;
2342 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2346 hbh0 = (ip6_hop_by_hop_header_t *) t->option_data;
2348 s = format (s, "IP6_HOP_BY_HOP: next index %d len %d traced %d",
2349 t->next_index, (hbh0->length + 1) << 3, t->trace_len);
2351 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2352 limit0 = (ip6_hop_by_hop_option_t *) ((u8 *) hbh0) + t->trace_len;
2354 while (opt0 < limit0)
2359 case 0: /* Pad, just stop */
2360 opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0) + 1;
2364 if (hm->trace[type0])
2366 s = (*hm->trace[type0]) (s, opt0);
2370 s = format (s, "\n unrecognized option %d length %d", type0,
2374 (ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length +
2375 sizeof (ip6_hop_by_hop_option_t));
2383 ip6_scan_hbh_options (vlib_buffer_t * b0,
2385 ip6_hop_by_hop_header_t * hbh0,
2386 ip6_hop_by_hop_option_t * opt0,
2387 ip6_hop_by_hop_option_t * limit0, u32 * next0)
2389 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2393 while (opt0 < limit0)
2399 opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0) + 1;
2404 if (hm->options[type0])
2406 if ((*hm->options[type0]) (b0, ip0, opt0) < 0)
2408 error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2414 /* Unrecognized mandatory option, check the two high order bits */
2415 switch (opt0->type & HBH_OPTION_TYPE_HIGH_ORDER_BITS)
2417 case HBH_OPTION_TYPE_SKIP_UNKNOWN:
2419 case HBH_OPTION_TYPE_DISCARD_UNKNOWN:
2420 error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2421 *next0 = IP_LOOKUP_NEXT_DROP;
2423 case HBH_OPTION_TYPE_DISCARD_UNKNOWN_ICMP:
2424 error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2425 *next0 = IP_LOOKUP_NEXT_ICMP_ERROR;
2426 icmp6_error_set_vnet_buffer (b0, ICMP6_parameter_problem,
2427 ICMP6_parameter_problem_unrecognized_option,
2428 (u8 *) opt0 - (u8 *) ip0);
2430 case HBH_OPTION_TYPE_DISCARD_UNKNOWN_ICMP_NOT_MCAST:
2431 error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2432 if (!ip6_address_is_multicast (&ip0->dst_address))
2434 *next0 = IP_LOOKUP_NEXT_ICMP_ERROR;
2435 icmp6_error_set_vnet_buffer (b0,
2436 ICMP6_parameter_problem,
2437 ICMP6_parameter_problem_unrecognized_option,
2438 (u8 *) opt0 - (u8 *) ip0);
2442 *next0 = IP_LOOKUP_NEXT_DROP;
2450 (ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length +
2451 sizeof (ip6_hop_by_hop_option_t));
2457 * Process the Hop-by-Hop Options header
2459 VLIB_NODE_FN (ip6_hop_by_hop_node) (vlib_main_t * vm,
2460 vlib_node_runtime_t * node,
2461 vlib_frame_t * frame)
2463 vlib_node_runtime_t *error_node =
2464 vlib_node_get_runtime (vm, ip6_hop_by_hop_node.index);
2465 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2466 u32 n_left_from, *from, *to_next;
2467 ip_lookup_next_t next_index;
2469 from = vlib_frame_vector_args (frame);
2470 n_left_from = frame->n_vectors;
2471 next_index = node->cached_next_index;
2473 while (n_left_from > 0)
2477 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
2479 while (n_left_from >= 4 && n_left_to_next >= 2)
2482 vlib_buffer_t *b0, *b1;
2484 ip6_header_t *ip0, *ip1;
2485 ip6_hop_by_hop_header_t *hbh0, *hbh1;
2486 ip6_hop_by_hop_option_t *opt0, *limit0, *opt1, *limit1;
2487 u8 error0 = 0, error1 = 0;
2489 /* Prefetch next iteration. */
2491 vlib_buffer_t *p2, *p3;
2493 p2 = vlib_get_buffer (vm, from[2]);
2494 p3 = vlib_get_buffer (vm, from[3]);
2496 vlib_prefetch_buffer_header (p2, LOAD);
2497 vlib_prefetch_buffer_header (p3, LOAD);
2499 CLIB_PREFETCH (p2->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
2500 CLIB_PREFETCH (p3->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
2503 /* Speculatively enqueue b0, b1 to the current next frame */
2504 to_next[0] = bi0 = from[0];
2505 to_next[1] = bi1 = from[1];
2509 n_left_to_next -= 2;
2511 b0 = vlib_get_buffer (vm, bi0);
2512 b1 = vlib_get_buffer (vm, bi1);
2514 /* Default use the next_index from the adjacency. A HBH option rarely redirects to a different node */
2515 u32 adj_index0 = vnet_buffer (b0)->ip.adj_index[VLIB_TX];
2516 ip_adjacency_t *adj0 = adj_get (adj_index0);
2517 u32 adj_index1 = vnet_buffer (b1)->ip.adj_index[VLIB_TX];
2518 ip_adjacency_t *adj1 = adj_get (adj_index1);
2520 /* Default use the next_index from the adjacency. A HBH option rarely redirects to a different node */
2521 next0 = adj0->lookup_next_index;
2522 next1 = adj1->lookup_next_index;
2524 ip0 = vlib_buffer_get_current (b0);
2525 ip1 = vlib_buffer_get_current (b1);
2526 hbh0 = (ip6_hop_by_hop_header_t *) (ip0 + 1);
2527 hbh1 = (ip6_hop_by_hop_header_t *) (ip1 + 1);
2528 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2529 opt1 = (ip6_hop_by_hop_option_t *) (hbh1 + 1);
2531 (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 +
2532 ((hbh0->length + 1) << 3));
2534 (ip6_hop_by_hop_option_t *) ((u8 *) hbh1 +
2535 ((hbh1->length + 1) << 3));
2538 * Basic validity checks
2540 if ((hbh0->length + 1) << 3 >
2541 clib_net_to_host_u16 (ip0->payload_length))
2543 error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2544 next0 = IP_LOOKUP_NEXT_DROP;
2547 /* Scan the set of h-b-h options, process ones that we understand */
2548 error0 = ip6_scan_hbh_options (b0, ip0, hbh0, opt0, limit0, &next0);
2550 if ((hbh1->length + 1) << 3 >
2551 clib_net_to_host_u16 (ip1->payload_length))
2553 error1 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2554 next1 = IP_LOOKUP_NEXT_DROP;
2557 /* Scan the set of h-b-h options, process ones that we understand */
2558 error1 = ip6_scan_hbh_options (b1, ip1, hbh1, opt1, limit1, &next1);
2561 /* Has the classifier flagged this buffer for special treatment? */
2564 && (vnet_buffer (b0)->l2_classify.opaque_index & OI_DECAP)))
2565 next0 = hm->next_override;
2567 /* Has the classifier flagged this buffer for special treatment? */
2570 && (vnet_buffer (b1)->l2_classify.opaque_index & OI_DECAP)))
2571 next1 = hm->next_override;
2573 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)))
2575 if (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);
2589 if (b1->flags & VLIB_BUFFER_IS_TRACED)
2591 ip6_hop_by_hop_trace_t *t =
2592 vlib_add_trace (vm, node, b1, sizeof (*t));
2593 u32 trace_len = (hbh1->length + 1) << 3;
2594 t->next_index = next1;
2595 /* Capture the h-b-h option verbatim */
2598 ARRAY_LEN (t->option_data) ? trace_len :
2599 ARRAY_LEN (t->option_data);
2600 t->trace_len = trace_len;
2601 clib_memcpy_fast (t->option_data, hbh1, trace_len);
2606 b0->error = error_node->errors[error0];
2607 b1->error = error_node->errors[error1];
2609 /* verify speculative enqueue, maybe switch current next frame */
2610 vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
2611 n_left_to_next, bi0, bi1, next0,
2615 while (n_left_from > 0 && n_left_to_next > 0)
2621 ip6_hop_by_hop_header_t *hbh0;
2622 ip6_hop_by_hop_option_t *opt0, *limit0;
2625 /* Speculatively enqueue b0 to the current next frame */
2631 n_left_to_next -= 1;
2633 b0 = vlib_get_buffer (vm, bi0);
2635 * Default use the next_index from the adjacency.
2636 * A HBH option rarely redirects to a different node
2638 u32 adj_index0 = vnet_buffer (b0)->ip.adj_index[VLIB_TX];
2639 ip_adjacency_t *adj0 = adj_get (adj_index0);
2640 next0 = adj0->lookup_next_index;
2642 ip0 = vlib_buffer_get_current (b0);
2643 hbh0 = (ip6_hop_by_hop_header_t *) (ip0 + 1);
2644 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2646 (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 +
2647 ((hbh0->length + 1) << 3));
2650 * Basic validity checks
2652 if ((hbh0->length + 1) << 3 >
2653 clib_net_to_host_u16 (ip0->payload_length))
2655 error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2656 next0 = IP_LOOKUP_NEXT_DROP;
2660 /* Scan the set of h-b-h options, process ones that we understand */
2661 error0 = ip6_scan_hbh_options (b0, ip0, hbh0, opt0, limit0, &next0);
2664 /* Has the classifier flagged this buffer for special treatment? */
2667 && (vnet_buffer (b0)->l2_classify.opaque_index & OI_DECAP)))
2668 next0 = hm->next_override;
2670 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
2672 ip6_hop_by_hop_trace_t *t =
2673 vlib_add_trace (vm, node, b0, sizeof (*t));
2674 u32 trace_len = (hbh0->length + 1) << 3;
2675 t->next_index = next0;
2676 /* Capture the h-b-h option verbatim */
2679 ARRAY_LEN (t->option_data) ? trace_len :
2680 ARRAY_LEN (t->option_data);
2681 t->trace_len = trace_len;
2682 clib_memcpy_fast (t->option_data, hbh0, trace_len);
2685 b0->error = error_node->errors[error0];
2687 /* verify speculative enqueue, maybe switch current next frame */
2688 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
2689 n_left_to_next, bi0, next0);
2691 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2693 return frame->n_vectors;
2697 VLIB_REGISTER_NODE (ip6_hop_by_hop_node) =
2699 .name = "ip6-hop-by-hop",
2700 .sibling_of = "ip6-lookup",
2701 .vector_size = sizeof (u32),
2702 .format_trace = format_ip6_hop_by_hop_trace,
2703 .type = VLIB_NODE_TYPE_INTERNAL,
2704 .n_errors = ARRAY_LEN (ip6_hop_by_hop_error_strings),
2705 .error_strings = ip6_hop_by_hop_error_strings,
2710 static clib_error_t *
2711 ip6_hop_by_hop_init (vlib_main_t * vm)
2713 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2714 clib_memset (hm->options, 0, sizeof (hm->options));
2715 clib_memset (hm->trace, 0, sizeof (hm->trace));
2716 hm->next_override = IP6_LOOKUP_NEXT_POP_HOP_BY_HOP;
2720 VLIB_INIT_FUNCTION (ip6_hop_by_hop_init);
2722 #ifndef CLIB_MARCH_VARIANT
2724 ip6_hbh_set_next_override (uword next)
2726 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2728 hm->next_override = next;
2732 ip6_hbh_register_option (u8 option,
2733 int options (vlib_buffer_t * b, ip6_header_t * ip,
2734 ip6_hop_by_hop_option_t * opt),
2735 u8 * trace (u8 * s, ip6_hop_by_hop_option_t * opt))
2737 ip6_main_t *im = &ip6_main;
2738 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2740 ASSERT ((u32) option < ARRAY_LEN (hm->options));
2742 /* Already registered */
2743 if (hm->options[option])
2746 hm->options[option] = options;
2747 hm->trace[option] = trace;
2749 /* Set global variable */
2750 im->hbh_enabled = 1;
2756 ip6_hbh_unregister_option (u8 option)
2758 ip6_main_t *im = &ip6_main;
2759 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2761 ASSERT ((u32) option < ARRAY_LEN (hm->options));
2763 /* Not registered */
2764 if (!hm->options[option])
2767 hm->options[option] = NULL;
2768 hm->trace[option] = NULL;
2770 /* Disable global knob if this was the last option configured */
2773 for (i = 0; i < 256; i++)
2775 if (hm->options[option])
2782 im->hbh_enabled = 0;
2787 /* Global IP6 main. */
2788 ip6_main_t ip6_main;
2791 static clib_error_t *
2792 ip6_lookup_init (vlib_main_t * vm)
2794 ip6_main_t *im = &ip6_main;
2795 clib_error_t *error;
2798 if ((error = vlib_call_init_function (vm, vnet_feature_init)))
2801 for (i = 0; i < ARRAY_LEN (im->fib_masks); i++)
2808 for (j = 0; j < i0; j++)
2809 im->fib_masks[i].as_u32[j] = ~0;
2812 im->fib_masks[i].as_u32[i0] =
2813 clib_host_to_net_u32 (pow2_mask (i1) << (32 - i1));
2816 ip_lookup_init (&im->lookup_main, /* is_ip6 */ 1);
2818 /* Create FIB with index 0 and table id of 0. */
2819 fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6, 0,
2820 FIB_SOURCE_DEFAULT_ROUTE);
2821 mfib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6, 0,
2822 MFIB_SOURCE_DEFAULT_ROUTE);
2826 pn = pg_get_node (ip6_lookup_node.index);
2827 pn->unformat_edit = unformat_pg_ip6_header;
2830 /* Unless explicitly configured, don't process HBH options */
2831 im->hbh_enabled = 0;
2836 VLIB_INIT_FUNCTION (ip6_lookup_init);
2838 static clib_error_t *
2839 set_ip6_flow_hash_command_fn (vlib_main_t * vm,
2840 unformat_input_t * input,
2841 vlib_cli_command_t * cmd)
2845 u32 flow_hash_config = 0;
2848 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
2850 if (unformat (input, "table %d", &table_id))
2852 #define _(a, b, v) \
2853 else if (unformat (input, #a)) \
2855 flow_hash_config |= v; \
2858 foreach_flow_hash_bit
2865 return clib_error_return (0, "unknown input `%U'",
2866 format_unformat_error, input);
2868 rv = ip_flow_hash_set (AF_IP6, table_id, flow_hash_config);
2875 return clib_error_return (0, "no such FIB table %d", table_id);
2878 clib_warning ("BUG: illegal flow hash config 0x%x", flow_hash_config);
2886 * Configure the set of IPv6 fields used by the flow hash.
2890 * Example of how to set the flow hash on a given table:
2891 * @cliexcmd{set ip6 flow-hash table 8 dst sport dport proto}
2893 * Example of display the configured flow hash:
2894 * @cliexstart{show ip6 fib}
2895 * ipv6-VRF:0, fib_index 0, flow hash: src dst sport dport proto
2898 * [@0]: dpo-load-balance: [index:5 buckets:1 uRPF:5 to:[0:0]]
2899 * [0] [@0]: dpo-drop ip6
2902 * [@0]: dpo-load-balance: [index:10 buckets:1 uRPF:10 to:[0:0]]
2903 * [0] [@2]: dpo-receive
2906 * [@0]: dpo-load-balance: [index:8 buckets:1 uRPF:8 to:[0:0]]
2907 * [0] [@2]: dpo-receive
2910 * [@0]: dpo-load-balance: [index:7 buckets:1 uRPF:7 to:[0:0]]
2911 * [0] [@2]: dpo-receive
2914 * [@0]: dpo-load-balance: [index:9 buckets:1 uRPF:9 to:[0:0]]
2915 * [0] [@2]: dpo-receive
2916 * ff02::1:ff00:0/104
2918 * [@0]: dpo-load-balance: [index:6 buckets:1 uRPF:6 to:[0:0]]
2919 * [0] [@2]: dpo-receive
2920 * ipv6-VRF:8, fib_index 1, flow hash: dst sport dport proto
2923 * [@0]: dpo-load-balance: [index:21 buckets:1 uRPF:20 to:[0:0]]
2924 * [0] [@0]: dpo-drop ip6
2927 * [@0]: dpo-load-balance: [index:27 buckets:1 uRPF:26 to:[0:0]]
2928 * [0] [@4]: ipv6-glean: af_packet0
2931 * [@0]: dpo-load-balance: [index:28 buckets:1 uRPF:27 to:[0:0]]
2932 * [0] [@2]: dpo-receive: @::a:1:1:0:7 on af_packet0
2935 * [@0]: dpo-load-balance: [index:26 buckets:1 uRPF:25 to:[0:0]]
2936 * [0] [@2]: dpo-receive
2937 * fe80::fe:3eff:fe3e:9222/128
2939 * [@0]: dpo-load-balance: [index:29 buckets:1 uRPF:28 to:[0:0]]
2940 * [0] [@2]: dpo-receive: fe80::fe:3eff:fe3e:9222 on af_packet0
2943 * [@0]: dpo-load-balance: [index:24 buckets:1 uRPF:23 to:[0:0]]
2944 * [0] [@2]: dpo-receive
2947 * [@0]: dpo-load-balance: [index:23 buckets:1 uRPF:22 to:[0:0]]
2948 * [0] [@2]: dpo-receive
2951 * [@0]: dpo-load-balance: [index:25 buckets:1 uRPF:24 to:[0:0]]
2952 * [0] [@2]: dpo-receive
2953 * ff02::1:ff00:0/104
2955 * [@0]: dpo-load-balance: [index:22 buckets:1 uRPF:21 to:[0:0]]
2956 * [0] [@2]: dpo-receive
2961 VLIB_CLI_COMMAND (set_ip6_flow_hash_command, static) = {
2962 .path = "set ip6 flow-hash",
2963 .short_help = "set ip6 flow-hash table <table-id> [src] [dst] [sport] "
2964 "[dport] [proto] [reverse] [flowlabel]",
2965 .function = set_ip6_flow_hash_command_fn,
2969 static clib_error_t *
2970 show_ip6_local_command_fn (vlib_main_t * vm,
2971 unformat_input_t * input, vlib_cli_command_t * cmd)
2973 ip6_main_t *im = &ip6_main;
2974 ip_lookup_main_t *lm = &im->lookup_main;
2977 vlib_cli_output (vm, "Protocols handled by ip6_local");
2978 for (i = 0; i < ARRAY_LEN (lm->local_next_by_ip_protocol); i++)
2980 if (lm->local_next_by_ip_protocol[i] != IP_LOCAL_NEXT_PUNT)
2983 u32 node_index = vlib_get_node (vm,
2984 ip6_local_node.index)->
2985 next_nodes[lm->local_next_by_ip_protocol[i]];
2986 vlib_cli_output (vm, "%d: %U", i, format_vlib_node_name, vm,
2996 * Display the set of protocols handled by the local IPv6 stack.
2999 * Example of how to display local protocol table:
3000 * @cliexstart{show ip6 local}
3001 * Protocols handled by ip6_local
3009 VLIB_CLI_COMMAND (show_ip6_local, static) =
3011 .path = "show ip6 local",
3012 .function = show_ip6_local_command_fn,
3013 .short_help = "show ip6 local",
3017 #ifndef CLIB_MARCH_VARIANT
3019 vnet_set_ip6_classify_intfc (vlib_main_t *vm, u32 sw_if_index, u32 table_index)
3021 vnet_main_t *vnm = vnet_get_main ();
3022 vnet_interface_main_t *im = &vnm->interface_main;
3023 ip6_main_t *ipm = &ip6_main;
3024 ip_lookup_main_t *lm = &ipm->lookup_main;
3025 vnet_classify_main_t *cm = &vnet_classify_main;
3026 ip6_address_t *if_addr;
3028 if (pool_is_free_index (im->sw_interfaces, sw_if_index))
3029 return VNET_API_ERROR_NO_MATCHING_INTERFACE;
3031 if (table_index != ~0 && pool_is_free_index (cm->tables, table_index))
3032 return VNET_API_ERROR_NO_SUCH_ENTRY;
3034 vec_validate (lm->classify_table_index_by_sw_if_index, sw_if_index);
3035 lm->classify_table_index_by_sw_if_index[sw_if_index] = table_index;
3037 if_addr = ip6_interface_first_address (ipm, sw_if_index);
3039 if (NULL != if_addr)
3041 fib_prefix_t pfx = {
3043 .fp_proto = FIB_PROTOCOL_IP6,
3044 .fp_addr.ip6 = *if_addr,
3048 fib_index = fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4,
3050 if (table_index != (u32) ~ 0)
3052 dpo_id_t dpo = DPO_INVALID;
3056 classify_dpo_create (DPO_PROTO_IP6, table_index));
3057 fib_table_entry_special_dpo_add (fib_index,
3059 FIB_SOURCE_CLASSIFY,
3060 FIB_ENTRY_FLAG_NONE, &dpo);
3065 fib_table_entry_special_remove (fib_index,
3066 &pfx, FIB_SOURCE_CLASSIFY);
3074 static clib_error_t *
3075 set_ip6_classify_command_fn (vlib_main_t * vm,
3076 unformat_input_t * input,
3077 vlib_cli_command_t * cmd)
3079 u32 table_index = ~0;
3080 int table_index_set = 0;
3081 u32 sw_if_index = ~0;
3084 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
3086 if (unformat (input, "table-index %d", &table_index))
3087 table_index_set = 1;
3088 else if (unformat (input, "intfc %U", unformat_vnet_sw_interface,
3089 vnet_get_main (), &sw_if_index))
3095 if (table_index_set == 0)
3096 return clib_error_return (0, "classify table-index must be specified");
3098 if (sw_if_index == ~0)
3099 return clib_error_return (0, "interface / subif must be specified");
3101 rv = vnet_set_ip6_classify_intfc (vm, sw_if_index, table_index);
3108 case VNET_API_ERROR_NO_MATCHING_INTERFACE:
3109 return clib_error_return (0, "No such interface");
3111 case VNET_API_ERROR_NO_SUCH_ENTRY:
3112 return clib_error_return (0, "No such classifier table");
3118 * Assign a classification table to an interface. The classification
3119 * table is created using the '<em>classify table</em>' and '<em>classify session</em>'
3120 * commands. Once the table is create, use this command to filter packets
3124 * Example of how to assign a classification table to an interface:
3125 * @cliexcmd{set ip6 classify intfc GigabitEthernet2/0/0 table-index 1}
3128 VLIB_CLI_COMMAND (set_ip6_classify_command, static) =
3130 .path = "set ip6 classify",
3132 "set ip6 classify intfc <interface> table-index <classify-idx>",
3133 .function = set_ip6_classify_command_fn,
3138 * fd.io coding-style-patch-verification: ON
3141 * eval: (c-set-style "gnu")