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/ipsec/ipsec_tun.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 u32 good_l4_csum[2];
1339 flags[0] & (VNET_BUFFER_F_L4_CHECKSUM_CORRECT |
1340 VNET_BUFFER_F_OFFLOAD_TCP_CKSUM |
1341 VNET_BUFFER_F_OFFLOAD_UDP_CKSUM);
1343 flags[1] & (VNET_BUFFER_F_L4_CHECKSUM_CORRECT |
1344 VNET_BUFFER_F_OFFLOAD_TCP_CKSUM |
1345 VNET_BUFFER_F_OFFLOAD_UDP_CKSUM);
1347 u32 udp_offset[2] = { };
1350 ip6_next_proto_is_tcp_udp (b[0], ip[0], &udp_offset[0]);
1352 ip6_next_proto_is_tcp_udp (b[1], ip[1], &udp_offset[1]);
1353 i16 len_diff[2] = { 0 };
1354 if (PREDICT_TRUE (is_tcp_udp[0]))
1357 (udp_header_t *) ((u8 *) ip[0] + udp_offset[0]);
1358 good_l4_csum[0] |= type[0] == IP_BUILTIN_PROTOCOL_UDP
1359 && udp->checksum == 0;
1360 /* optimistically verify UDP length. */
1361 u16 ip_len, udp_len;
1362 ip_len = clib_net_to_host_u16 (ip[0]->payload_length);
1363 udp_len = clib_net_to_host_u16 (udp->length);
1364 len_diff[0] = ip_len - udp_len;
1366 if (PREDICT_TRUE (is_tcp_udp[1]))
1369 (udp_header_t *) ((u8 *) ip[1] + udp_offset[1]);
1370 good_l4_csum[1] |= type[1] == IP_BUILTIN_PROTOCOL_UDP
1371 && udp->checksum == 0;
1372 /* optimistically verify UDP length. */
1373 u16 ip_len, udp_len;
1374 ip_len = clib_net_to_host_u16 (ip[1]->payload_length);
1375 udp_len = clib_net_to_host_u16 (udp->length);
1376 len_diff[1] = ip_len - udp_len;
1379 good_l4_csum[0] |= type[0] == IP_BUILTIN_PROTOCOL_UNKNOWN;
1380 good_l4_csum[1] |= type[1] == IP_BUILTIN_PROTOCOL_UNKNOWN;
1382 len_diff[0] = type[0] == IP_BUILTIN_PROTOCOL_UDP ? len_diff[0] : 0;
1383 len_diff[1] = type[1] == IP_BUILTIN_PROTOCOL_UDP ? len_diff[1] : 0;
1386 need_csum[0] = type[0] != IP_BUILTIN_PROTOCOL_UNKNOWN
1388 && !(flags[0] & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED);
1389 need_csum[1] = type[1] != IP_BUILTIN_PROTOCOL_UNKNOWN
1391 && !(flags[1] & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED);
1392 if (PREDICT_FALSE (need_csum[0]))
1394 flags[0] = ip6_tcp_udp_icmp_validate_checksum (vm, b[0]);
1395 good_l4_csum[0] = flags[0] & VNET_BUFFER_F_L4_CHECKSUM_CORRECT;
1396 error[0] = IP6_ERROR_UNKNOWN_PROTOCOL;
1400 if (ip6_tcp_udp_icmp_bad_length (vm, b[0]))
1401 error[0] = IP6_ERROR_BAD_LENGTH;
1403 if (PREDICT_FALSE (need_csum[1]))
1405 flags[1] = ip6_tcp_udp_icmp_validate_checksum (vm, b[1]);
1406 good_l4_csum[1] = flags[1] & VNET_BUFFER_F_L4_CHECKSUM_CORRECT;
1407 error[1] = IP6_ERROR_UNKNOWN_PROTOCOL;
1411 if (ip6_tcp_udp_icmp_bad_length (vm, b[1]))
1412 error[1] = IP6_ERROR_BAD_LENGTH;
1416 error[0] = len_diff[0] < 0 ? IP6_ERROR_UDP_LENGTH : error[0];
1418 error[1] = len_diff[1] < 0 ? IP6_ERROR_UDP_LENGTH : error[1];
1420 STATIC_ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_UDP ==
1421 IP6_ERROR_UDP_CHECKSUM,
1422 "Wrong IP6 errors constants");
1423 STATIC_ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_ICMP ==
1424 IP6_ERROR_ICMP_CHECKSUM,
1425 "Wrong IP6 errors constants");
1428 !good_l4_csum[0] ? IP6_ERROR_UDP_CHECKSUM + type[0] : error[0];
1430 !good_l4_csum[1] ? IP6_ERROR_UDP_CHECKSUM + type[1] : error[1];
1432 /* Drop packets from unroutable hosts. */
1433 /* If this is a neighbor solicitation (ICMP), skip source RPF check */
1435 unroutable[0] = error[0] == IP6_ERROR_UNKNOWN_PROTOCOL
1436 && type[0] != IP_BUILTIN_PROTOCOL_ICMP
1437 && !ip6_address_is_link_local_unicast (&ip[0]->src_address);
1438 unroutable[1] = error[1] == IP6_ERROR_UNKNOWN_PROTOCOL
1439 && type[1] != IP_BUILTIN_PROTOCOL_ICMP
1440 && !ip6_address_is_link_local_unicast (&ip[1]->src_address);
1441 if (PREDICT_FALSE (unroutable[0]))
1444 !ip6_urpf_loose_check (im, b[0],
1445 ip[0]) ? IP6_ERROR_SRC_LOOKUP_MISS
1448 if (PREDICT_FALSE (unroutable[1]))
1451 !ip6_urpf_loose_check (im, b[1],
1452 ip[1]) ? IP6_ERROR_SRC_LOOKUP_MISS
1456 vnet_buffer (b[0])->ip.fib_index =
1457 vnet_buffer (b[0])->sw_if_index[VLIB_TX] != ~0 ?
1458 vnet_buffer (b[0])->sw_if_index[VLIB_TX] :
1459 vnet_buffer (b[0])->ip.fib_index;
1460 vnet_buffer (b[1])->ip.fib_index =
1461 vnet_buffer (b[1])->sw_if_index[VLIB_TX] != ~0 ?
1462 vnet_buffer (b[1])->sw_if_index[VLIB_TX] :
1463 vnet_buffer (b[1])->ip.fib_index;
1464 } /* head_of_feature_arc */
1466 next[0] = lm->local_next_by_ip_protocol[ip[0]->protocol];
1468 error[0] != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next[0];
1469 next[1] = lm->local_next_by_ip_protocol[ip[1]->protocol];
1471 error[1] != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next[1];
1473 b[0]->error = error_node->errors[0];
1474 b[1]->error = error_node->errors[1];
1476 if (head_of_feature_arc)
1479 ip6_unknown[0] = error[0] == (u8) IP6_ERROR_UNKNOWN_PROTOCOL;
1480 ip6_unknown[1] = error[1] == (u8) IP6_ERROR_UNKNOWN_PROTOCOL;
1481 if (PREDICT_TRUE (ip6_unknown[0]))
1483 u32 next32 = next[0];
1484 vnet_feature_arc_start (arc_index,
1485 vnet_buffer (b[0])->sw_if_index
1486 [VLIB_RX], &next32, b[0]);
1489 if (PREDICT_TRUE (ip6_unknown[1]))
1491 u32 next32 = next[1];
1492 vnet_feature_arc_start (arc_index,
1493 vnet_buffer (b[1])->sw_if_index
1494 [VLIB_RX], &next32, b[1]);
1508 error = IP6_ERROR_UNKNOWN_PROTOCOL;
1511 ip = vlib_buffer_get_current (b[0]);
1513 if (head_of_feature_arc)
1515 vnet_buffer (b[0])->l3_hdr_offset = b[0]->current_data;
1516 u8 type = lm->builtin_protocol_by_ip_protocol[ip->protocol];
1518 u32 flags = b[0]->flags;
1520 flags & (VNET_BUFFER_F_L4_CHECKSUM_CORRECT |
1521 VNET_BUFFER_F_OFFLOAD_TCP_CKSUM |
1522 VNET_BUFFER_F_OFFLOAD_UDP_CKSUM);
1526 u8 is_tcp_udp = ip6_next_proto_is_tcp_udp (b[0], ip, &udp_offset);
1527 if (PREDICT_TRUE (is_tcp_udp))
1529 udp_header_t *udp = (udp_header_t *) ((u8 *) ip + udp_offset);
1530 /* Don't verify UDP checksum for packets with explicit zero checksum. */
1531 good_l4_csum |= type == IP_BUILTIN_PROTOCOL_UDP
1532 && udp->checksum == 0;
1533 /* optimistically verify UDP length. */
1534 u16 ip_len, udp_len;
1535 ip_len = clib_net_to_host_u16 (ip->payload_length);
1536 udp_len = clib_net_to_host_u16 (udp->length);
1537 len_diff = ip_len - udp_len;
1540 good_l4_csum |= type == IP_BUILTIN_PROTOCOL_UNKNOWN;
1541 len_diff = type == IP_BUILTIN_PROTOCOL_UDP ? len_diff : 0;
1543 u8 need_csum = type != IP_BUILTIN_PROTOCOL_UNKNOWN && !good_l4_csum
1544 && !(flags & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED);
1545 if (PREDICT_FALSE (need_csum))
1547 flags = ip6_tcp_udp_icmp_validate_checksum (vm, b[0]);
1548 good_l4_csum = flags & VNET_BUFFER_F_L4_CHECKSUM_CORRECT;
1549 error = IP6_ERROR_UNKNOWN_PROTOCOL;
1553 if (ip6_tcp_udp_icmp_bad_length (vm, b[0]))
1554 error = IP6_ERROR_BAD_LENGTH;
1559 error = len_diff < 0 ? IP6_ERROR_UDP_LENGTH : error;
1561 STATIC_ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_UDP ==
1562 IP6_ERROR_UDP_CHECKSUM,
1563 "Wrong IP6 errors constants");
1564 STATIC_ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_ICMP ==
1565 IP6_ERROR_ICMP_CHECKSUM,
1566 "Wrong IP6 errors constants");
1568 error = !good_l4_csum ? IP6_ERROR_UDP_CHECKSUM + type : error;
1570 /* Drop packets from unroutable hosts. */
1571 /* If this is a neighbor solicitation (ICMP), skip source RPF check */
1572 u8 unroutable = error == IP6_ERROR_UNKNOWN_PROTOCOL
1573 && type != IP_BUILTIN_PROTOCOL_ICMP
1574 && !ip6_address_is_link_local_unicast (&ip->src_address);
1575 if (PREDICT_FALSE (unroutable))
1578 !ip6_urpf_loose_check (im, b[0],
1579 ip) ? IP6_ERROR_SRC_LOOKUP_MISS :
1583 vnet_buffer (b[0])->ip.fib_index =
1584 vnet_buffer (b[0])->sw_if_index[VLIB_TX] != ~0 ?
1585 vnet_buffer (b[0])->sw_if_index[VLIB_TX] :
1586 vnet_buffer (b[0])->ip.fib_index;
1587 } /* head_of_feature_arc */
1589 next[0] = lm->local_next_by_ip_protocol[ip->protocol];
1591 error != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next[0];
1593 b[0]->error = error_node->errors[0];
1595 if (head_of_feature_arc)
1597 if (PREDICT_TRUE (error == (u8) IP6_ERROR_UNKNOWN_PROTOCOL))
1599 u32 next32 = next[0];
1600 vnet_feature_arc_start (arc_index,
1601 vnet_buffer (b[0])->sw_if_index
1602 [VLIB_RX], &next32, b[0]);
1613 vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors);
1614 return frame->n_vectors;
1617 VLIB_NODE_FN (ip6_local_node) (vlib_main_t * vm, vlib_node_runtime_t * node,
1618 vlib_frame_t * frame)
1620 return ip6_local_inline (vm, node, frame, 1 /* head of feature arc */ );
1624 VLIB_REGISTER_NODE (ip6_local_node) =
1626 .name = "ip6-local",
1627 .vector_size = sizeof (u32),
1628 .format_trace = format_ip6_forward_next_trace,
1629 .n_next_nodes = IP_LOCAL_N_NEXT,
1632 [IP_LOCAL_NEXT_DROP] = "ip6-drop",
1633 [IP_LOCAL_NEXT_PUNT] = "ip6-punt",
1634 [IP_LOCAL_NEXT_UDP_LOOKUP] = "ip6-udp-lookup",
1635 [IP_LOCAL_NEXT_ICMP] = "ip6-icmp-input",
1636 [IP_LOCAL_NEXT_REASSEMBLY] = "ip6-full-reassembly",
1641 VLIB_NODE_FN (ip6_local_end_of_arc_node) (vlib_main_t * vm,
1642 vlib_node_runtime_t * node,
1643 vlib_frame_t * frame)
1645 return ip6_local_inline (vm, node, frame, 0 /* head of feature arc */ );
1649 VLIB_REGISTER_NODE (ip6_local_end_of_arc_node) = {
1650 .name = "ip6-local-end-of-arc",
1651 .vector_size = sizeof (u32),
1653 .format_trace = format_ip6_forward_next_trace,
1654 .sibling_of = "ip6-local",
1657 VNET_FEATURE_INIT (ip6_local_end_of_arc, static) = {
1658 .arc_name = "ip6-local",
1659 .node_name = "ip6-local-end-of-arc",
1660 .runs_before = 0, /* not before any other features */
1664 #ifdef CLIB_MARCH_VARIANT
1665 extern vlib_node_registration_t ip6_local_node;
1668 ip6_register_protocol (u32 protocol, u32 node_index)
1670 vlib_main_t *vm = vlib_get_main ();
1671 ip6_main_t *im = &ip6_main;
1672 ip_lookup_main_t *lm = &im->lookup_main;
1674 ASSERT (protocol < ARRAY_LEN (lm->local_next_by_ip_protocol));
1675 lm->local_next_by_ip_protocol[protocol] =
1676 vlib_node_add_next (vm, ip6_local_node.index, node_index);
1680 ip6_unregister_protocol (u32 protocol)
1682 ip6_main_t *im = &ip6_main;
1683 ip_lookup_main_t *lm = &im->lookup_main;
1685 ASSERT (protocol < ARRAY_LEN (lm->local_next_by_ip_protocol));
1686 lm->local_next_by_ip_protocol[protocol] = IP_LOCAL_NEXT_PUNT;
1692 IP6_REWRITE_NEXT_DROP,
1693 IP6_REWRITE_NEXT_ICMP_ERROR,
1694 IP6_REWRITE_NEXT_FRAGMENT,
1695 IP6_REWRITE_N_NEXT /* Last */
1696 } ip6_rewrite_next_t;
1699 * This bits of an IPv6 address to mask to construct a multicast
1702 #define IP6_MCAST_ADDR_MASK 0xffffffff
1705 ip6_mtu_check (vlib_buffer_t * b, u16 packet_bytes,
1706 u16 adj_packet_bytes, bool is_locally_generated,
1707 u32 * next, u8 is_midchain, u32 * error)
1709 if (adj_packet_bytes >= 1280 && packet_bytes > adj_packet_bytes)
1711 if (is_locally_generated)
1713 /* IP fragmentation */
1714 ip_frag_set_vnet_buffer (b, adj_packet_bytes,
1716 IP_FRAG_NEXT_IP_REWRITE_MIDCHAIN :
1717 IP_FRAG_NEXT_IP_REWRITE), 0);
1718 *next = IP6_REWRITE_NEXT_FRAGMENT;
1719 *error = IP6_ERROR_MTU_EXCEEDED;
1723 *error = IP6_ERROR_MTU_EXCEEDED;
1724 icmp6_error_set_vnet_buffer (b, ICMP6_packet_too_big, 0,
1726 *next = IP6_REWRITE_NEXT_ICMP_ERROR;
1732 ip6_rewrite_inline_with_gso (vlib_main_t * vm,
1733 vlib_node_runtime_t * node,
1734 vlib_frame_t * frame,
1735 int do_counters, int is_midchain, int is_mcast)
1737 ip_lookup_main_t *lm = &ip6_main.lookup_main;
1738 u32 *from = vlib_frame_vector_args (frame);
1739 u32 n_left_from, n_left_to_next, *to_next, next_index;
1740 vlib_node_runtime_t *error_node =
1741 vlib_node_get_runtime (vm, ip6_input_node.index);
1743 n_left_from = frame->n_vectors;
1744 next_index = node->cached_next_index;
1745 u32 thread_index = vm->thread_index;
1747 while (n_left_from > 0)
1749 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1751 while (n_left_from >= 4 && n_left_to_next >= 2)
1753 const ip_adjacency_t *adj0, *adj1;
1754 vlib_buffer_t *p0, *p1;
1755 ip6_header_t *ip0, *ip1;
1756 u32 pi0, rw_len0, next0, error0, adj_index0;
1757 u32 pi1, rw_len1, next1, error1, adj_index1;
1758 u32 tx_sw_if_index0, tx_sw_if_index1;
1759 bool is_locally_originated0, is_locally_originated1;
1761 /* Prefetch next iteration. */
1763 vlib_buffer_t *p2, *p3;
1765 p2 = vlib_get_buffer (vm, from[2]);
1766 p3 = vlib_get_buffer (vm, from[3]);
1768 vlib_prefetch_buffer_header (p2, LOAD);
1769 vlib_prefetch_buffer_header (p3, LOAD);
1771 CLIB_PREFETCH (p2->pre_data, 32, STORE);
1772 CLIB_PREFETCH (p3->pre_data, 32, STORE);
1774 CLIB_PREFETCH (p2->data, sizeof (ip0[0]), STORE);
1775 CLIB_PREFETCH (p3->data, sizeof (ip0[0]), STORE);
1778 pi0 = to_next[0] = from[0];
1779 pi1 = to_next[1] = from[1];
1784 n_left_to_next -= 2;
1786 p0 = vlib_get_buffer (vm, pi0);
1787 p1 = vlib_get_buffer (vm, pi1);
1789 adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
1790 adj_index1 = vnet_buffer (p1)->ip.adj_index[VLIB_TX];
1792 ip0 = vlib_buffer_get_current (p0);
1793 ip1 = vlib_buffer_get_current (p1);
1795 error0 = error1 = IP6_ERROR_NONE;
1796 next0 = next1 = IP6_REWRITE_NEXT_DROP;
1798 is_locally_originated0 =
1799 p0->flags & VNET_BUFFER_F_LOCALLY_ORIGINATED;
1800 if (PREDICT_TRUE (!is_locally_originated0))
1802 i32 hop_limit0 = ip0->hop_limit;
1804 /* Input node should have reject packets with hop limit 0. */
1805 ASSERT (ip0->hop_limit > 0);
1809 ip0->hop_limit = hop_limit0;
1812 * If the hop count drops below 1 when forwarding, generate
1815 if (PREDICT_FALSE (hop_limit0 <= 0))
1817 error0 = IP6_ERROR_TIME_EXPIRED;
1818 next0 = IP6_REWRITE_NEXT_ICMP_ERROR;
1819 vnet_buffer (p0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
1820 icmp6_error_set_vnet_buffer (p0, ICMP6_time_exceeded,
1821 ICMP6_time_exceeded_ttl_exceeded_in_transit,
1826 is_locally_originated1 =
1827 p1->flags & VNET_BUFFER_F_LOCALLY_ORIGINATED;
1828 if (PREDICT_TRUE (!is_locally_originated1))
1830 i32 hop_limit1 = ip1->hop_limit;
1832 /* Input node should have reject packets with hop limit 0. */
1833 ASSERT (ip1->hop_limit > 0);
1837 ip1->hop_limit = hop_limit1;
1840 * If the hop count drops below 1 when forwarding, generate
1843 if (PREDICT_FALSE (hop_limit1 <= 0))
1845 error1 = IP6_ERROR_TIME_EXPIRED;
1846 next1 = IP6_REWRITE_NEXT_ICMP_ERROR;
1847 vnet_buffer (p1)->sw_if_index[VLIB_TX] = (u32) ~ 0;
1848 icmp6_error_set_vnet_buffer (p1, ICMP6_time_exceeded,
1849 ICMP6_time_exceeded_ttl_exceeded_in_transit,
1854 adj0 = adj_get (adj_index0);
1855 adj1 = adj_get (adj_index1);
1857 rw_len0 = adj0[0].rewrite_header.data_bytes;
1858 rw_len1 = adj1[0].rewrite_header.data_bytes;
1859 vnet_buffer (p0)->ip.save_rewrite_length = rw_len0;
1860 vnet_buffer (p1)->ip.save_rewrite_length = rw_len1;
1864 vlib_increment_combined_counter
1865 (&adjacency_counters,
1866 thread_index, adj_index0, 1,
1867 vlib_buffer_length_in_chain (vm, p0) + rw_len0);
1868 vlib_increment_combined_counter
1869 (&adjacency_counters,
1870 thread_index, adj_index1, 1,
1871 vlib_buffer_length_in_chain (vm, p1) + rw_len1);
1874 /* Check MTU of outgoing interface. */
1876 clib_net_to_host_u16 (ip0->payload_length) +
1877 sizeof (ip6_header_t);
1879 clib_net_to_host_u16 (ip1->payload_length) +
1880 sizeof (ip6_header_t);
1881 if (p0->flags & VNET_BUFFER_F_GSO)
1882 ip0_len = gso_mtu_sz (p0);
1883 if (p1->flags & VNET_BUFFER_F_GSO)
1884 ip1_len = gso_mtu_sz (p1);
1888 ip6_mtu_check (p0, ip0_len,
1889 adj0[0].rewrite_header.max_l3_packet_bytes,
1890 is_locally_originated0, &next0, is_midchain,
1892 ip6_mtu_check (p1, ip1_len,
1893 adj1[0].rewrite_header.max_l3_packet_bytes,
1894 is_locally_originated1, &next1, is_midchain,
1897 /* Don't adjust the buffer for hop count issue; icmp-error node
1898 * wants to see the IP header */
1899 if (PREDICT_TRUE (error0 == IP6_ERROR_NONE))
1901 p0->current_data -= rw_len0;
1902 p0->current_length += rw_len0;
1904 tx_sw_if_index0 = adj0[0].rewrite_header.sw_if_index;
1905 vnet_buffer (p0)->sw_if_index[VLIB_TX] = tx_sw_if_index0;
1906 next0 = adj0[0].rewrite_header.next_index;
1909 (adj0[0].rewrite_header.flags & VNET_REWRITE_HAS_FEATURES))
1910 vnet_feature_arc_start_w_cfg_index
1911 (lm->output_feature_arc_index, tx_sw_if_index0, &next0, p0,
1912 adj0->ia_cfg_index);
1916 p0->error = error_node->errors[error0];
1918 if (PREDICT_TRUE (error1 == IP6_ERROR_NONE))
1920 p1->current_data -= rw_len1;
1921 p1->current_length += rw_len1;
1923 tx_sw_if_index1 = adj1[0].rewrite_header.sw_if_index;
1924 vnet_buffer (p1)->sw_if_index[VLIB_TX] = tx_sw_if_index1;
1925 next1 = adj1[0].rewrite_header.next_index;
1928 (adj1[0].rewrite_header.flags & VNET_REWRITE_HAS_FEATURES))
1929 vnet_feature_arc_start_w_cfg_index
1930 (lm->output_feature_arc_index, tx_sw_if_index1, &next1, p1,
1931 adj1->ia_cfg_index);
1935 p1->error = error_node->errors[error1];
1940 /* before we paint on the next header, update the L4
1941 * checksums if required, since there's no offload on a tunnel */
1942 vnet_calc_checksums_inline (vm, p0, 0 /* is_ip4 */ ,
1944 vnet_calc_checksums_inline (vm, p1, 0 /* is_ip4 */ ,
1947 /* Guess we are only writing on ipv6 header. */
1948 vnet_rewrite_two_headers (adj0[0], adj1[0],
1949 ip0, ip1, sizeof (ip6_header_t));
1952 /* Guess we are only writing on simple Ethernet header. */
1953 vnet_rewrite_two_headers (adj0[0], adj1[0],
1954 ip0, ip1, sizeof (ethernet_header_t));
1958 if (adj0->sub_type.midchain.fixup_func)
1959 adj0->sub_type.midchain.fixup_func
1960 (vm, adj0, p0, adj0->sub_type.midchain.fixup_data);
1961 if (adj1->sub_type.midchain.fixup_func)
1962 adj1->sub_type.midchain.fixup_func
1963 (vm, adj1, p1, adj1->sub_type.midchain.fixup_data);
1968 * copy bytes from the IP address into the MAC rewrite
1970 vnet_ip_mcast_fixup_header (IP6_MCAST_ADDR_MASK,
1972 rewrite_header.dst_mcast_offset,
1973 &ip0->dst_address.as_u32[3],
1975 vnet_ip_mcast_fixup_header (IP6_MCAST_ADDR_MASK,
1977 rewrite_header.dst_mcast_offset,
1978 &ip1->dst_address.as_u32[3],
1982 vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
1983 to_next, n_left_to_next,
1984 pi0, pi1, next0, next1);
1987 while (n_left_from > 0 && n_left_to_next > 0)
1989 ip_adjacency_t *adj0;
1993 u32 adj_index0, next0, error0;
1994 u32 tx_sw_if_index0;
1995 bool is_locally_originated0;
1997 pi0 = to_next[0] = from[0];
1999 p0 = vlib_get_buffer (vm, pi0);
2001 adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
2003 adj0 = adj_get (adj_index0);
2005 ip0 = vlib_buffer_get_current (p0);
2007 error0 = IP6_ERROR_NONE;
2008 next0 = IP6_REWRITE_NEXT_DROP;
2010 /* Check hop limit */
2011 is_locally_originated0 =
2012 p0->flags & VNET_BUFFER_F_LOCALLY_ORIGINATED;
2013 if (PREDICT_TRUE (!is_locally_originated0))
2015 i32 hop_limit0 = ip0->hop_limit;
2017 ASSERT (ip0->hop_limit > 0);
2021 ip0->hop_limit = hop_limit0;
2023 if (PREDICT_FALSE (hop_limit0 <= 0))
2026 * If the hop count drops below 1 when forwarding, generate
2029 error0 = IP6_ERROR_TIME_EXPIRED;
2030 next0 = IP6_REWRITE_NEXT_ICMP_ERROR;
2031 vnet_buffer (p0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
2032 icmp6_error_set_vnet_buffer (p0, ICMP6_time_exceeded,
2033 ICMP6_time_exceeded_ttl_exceeded_in_transit,
2040 vnet_calc_checksums_inline (vm, p0, 0 /* is_ip4 */ ,
2043 /* Guess we are only writing on ip6 header. */
2044 vnet_rewrite_one_header (adj0[0], ip0, sizeof (ip6_header_t));
2047 /* Guess we are only writing on simple Ethernet header. */
2048 vnet_rewrite_one_header (adj0[0], ip0,
2049 sizeof (ethernet_header_t));
2051 /* Update packet buffer attributes/set output interface. */
2052 rw_len0 = adj0[0].rewrite_header.data_bytes;
2053 vnet_buffer (p0)->ip.save_rewrite_length = rw_len0;
2057 vlib_increment_combined_counter
2058 (&adjacency_counters,
2059 thread_index, adj_index0, 1,
2060 vlib_buffer_length_in_chain (vm, p0) + rw_len0);
2063 /* Check MTU of outgoing interface. */
2065 clib_net_to_host_u16 (ip0->payload_length) +
2066 sizeof (ip6_header_t);
2067 if (p0->flags & VNET_BUFFER_F_GSO)
2068 ip0_len = gso_mtu_sz (p0);
2070 ip6_mtu_check (p0, ip0_len,
2071 adj0[0].rewrite_header.max_l3_packet_bytes,
2072 is_locally_originated0, &next0, is_midchain,
2075 /* Don't adjust the buffer for hop count issue; icmp-error node
2076 * wants to see the IP header */
2077 if (PREDICT_TRUE (error0 == IP6_ERROR_NONE))
2079 p0->current_data -= rw_len0;
2080 p0->current_length += rw_len0;
2082 tx_sw_if_index0 = adj0[0].rewrite_header.sw_if_index;
2084 vnet_buffer (p0)->sw_if_index[VLIB_TX] = tx_sw_if_index0;
2085 next0 = adj0[0].rewrite_header.next_index;
2088 (adj0[0].rewrite_header.flags & VNET_REWRITE_HAS_FEATURES))
2089 vnet_feature_arc_start_w_cfg_index
2090 (lm->output_feature_arc_index, tx_sw_if_index0, &next0, p0,
2091 adj0->ia_cfg_index);
2095 p0->error = error_node->errors[error0];
2100 if (adj0->sub_type.midchain.fixup_func)
2101 adj0->sub_type.midchain.fixup_func
2102 (vm, adj0, p0, adj0->sub_type.midchain.fixup_data);
2106 vnet_ip_mcast_fixup_header (IP6_MCAST_ADDR_MASK,
2108 rewrite_header.dst_mcast_offset,
2109 &ip0->dst_address.as_u32[3],
2116 n_left_to_next -= 1;
2118 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
2119 to_next, n_left_to_next,
2123 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2126 /* Need to do trace after rewrites to pick up new packet data. */
2127 if (node->flags & VLIB_NODE_FLAG_TRACE)
2128 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
2130 return frame->n_vectors;
2134 ip6_rewrite_inline (vlib_main_t * vm,
2135 vlib_node_runtime_t * node,
2136 vlib_frame_t * frame,
2137 int do_counters, int is_midchain, int is_mcast)
2139 return ip6_rewrite_inline_with_gso (vm, node, frame, do_counters,
2140 is_midchain, is_mcast);
2143 VLIB_NODE_FN (ip6_rewrite_node) (vlib_main_t * vm,
2144 vlib_node_runtime_t * node,
2145 vlib_frame_t * frame)
2147 if (adj_are_counters_enabled ())
2148 return ip6_rewrite_inline (vm, node, frame, 1, 0, 0);
2150 return ip6_rewrite_inline (vm, node, frame, 0, 0, 0);
2153 VLIB_NODE_FN (ip6_rewrite_bcast_node) (vlib_main_t * vm,
2154 vlib_node_runtime_t * node,
2155 vlib_frame_t * frame)
2157 if (adj_are_counters_enabled ())
2158 return ip6_rewrite_inline (vm, node, frame, 1, 0, 0);
2160 return ip6_rewrite_inline (vm, node, frame, 0, 0, 0);
2163 VLIB_NODE_FN (ip6_rewrite_mcast_node) (vlib_main_t * vm,
2164 vlib_node_runtime_t * node,
2165 vlib_frame_t * frame)
2167 if (adj_are_counters_enabled ())
2168 return ip6_rewrite_inline (vm, node, frame, 1, 0, 1);
2170 return ip6_rewrite_inline (vm, node, frame, 0, 0, 1);
2173 VLIB_NODE_FN (ip6_midchain_node) (vlib_main_t * vm,
2174 vlib_node_runtime_t * node,
2175 vlib_frame_t * frame)
2177 if (adj_are_counters_enabled ())
2178 return ip6_rewrite_inline (vm, node, frame, 1, 1, 0);
2180 return ip6_rewrite_inline (vm, node, frame, 0, 1, 0);
2183 VLIB_NODE_FN (ip6_mcast_midchain_node) (vlib_main_t * vm,
2184 vlib_node_runtime_t * node,
2185 vlib_frame_t * frame)
2187 if (adj_are_counters_enabled ())
2188 return ip6_rewrite_inline (vm, node, frame, 1, 1, 1);
2190 return ip6_rewrite_inline (vm, node, frame, 0, 1, 1);
2194 VLIB_REGISTER_NODE (ip6_midchain_node) =
2196 .name = "ip6-midchain",
2197 .vector_size = sizeof (u32),
2198 .format_trace = format_ip6_forward_next_trace,
2199 .sibling_of = "ip6-rewrite",
2202 VLIB_REGISTER_NODE (ip6_rewrite_node) =
2204 .name = "ip6-rewrite",
2205 .vector_size = sizeof (u32),
2206 .format_trace = format_ip6_rewrite_trace,
2207 .n_next_nodes = IP6_REWRITE_N_NEXT,
2210 [IP6_REWRITE_NEXT_DROP] = "ip6-drop",
2211 [IP6_REWRITE_NEXT_ICMP_ERROR] = "ip6-icmp-error",
2212 [IP6_REWRITE_NEXT_FRAGMENT] = "ip6-frag",
2216 VLIB_REGISTER_NODE (ip6_rewrite_bcast_node) = {
2217 .name = "ip6-rewrite-bcast",
2218 .vector_size = sizeof (u32),
2220 .format_trace = format_ip6_rewrite_trace,
2221 .sibling_of = "ip6-rewrite",
2224 VLIB_REGISTER_NODE (ip6_rewrite_mcast_node) =
2226 .name = "ip6-rewrite-mcast",
2227 .vector_size = sizeof (u32),
2228 .format_trace = format_ip6_rewrite_trace,
2229 .sibling_of = "ip6-rewrite",
2233 VLIB_REGISTER_NODE (ip6_mcast_midchain_node) =
2235 .name = "ip6-mcast-midchain",
2236 .vector_size = sizeof (u32),
2237 .format_trace = format_ip6_rewrite_trace,
2238 .sibling_of = "ip6-rewrite",
2244 * Hop-by-Hop handling
2246 #ifndef CLIB_MARCH_VARIANT
2247 ip6_hop_by_hop_main_t ip6_hop_by_hop_main;
2248 #endif /* CLIB_MARCH_VARIANT */
2250 #define foreach_ip6_hop_by_hop_error \
2251 _(PROCESSED, "pkts with ip6 hop-by-hop options") \
2252 _(FORMAT, "incorrectly formatted hop-by-hop options") \
2253 _(UNKNOWN_OPTION, "unknown ip6 hop-by-hop options")
2258 #define _(sym,str) IP6_HOP_BY_HOP_ERROR_##sym,
2259 foreach_ip6_hop_by_hop_error
2261 IP6_HOP_BY_HOP_N_ERROR,
2262 } ip6_hop_by_hop_error_t;
2266 * Primary h-b-h handler trace support
2267 * We work pretty hard on the problem for obvious reasons
2273 u8 option_data[256];
2274 } ip6_hop_by_hop_trace_t;
2276 extern vlib_node_registration_t ip6_hop_by_hop_node;
2278 static char *ip6_hop_by_hop_error_strings[] = {
2279 #define _(sym,string) string,
2280 foreach_ip6_hop_by_hop_error
2284 #ifndef CLIB_MARCH_VARIANT
2286 format_ip6_hop_by_hop_ext_hdr (u8 * s, va_list * args)
2288 ip6_hop_by_hop_header_t *hbh0 = va_arg (*args, ip6_hop_by_hop_header_t *);
2289 int total_len = va_arg (*args, int);
2290 ip6_hop_by_hop_option_t *opt0, *limit0;
2291 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2294 s = format (s, "IP6_HOP_BY_HOP: next protocol %d len %d total %d",
2295 hbh0->protocol, (hbh0->length + 1) << 3, total_len);
2297 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2298 limit0 = (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 + total_len);
2300 while (opt0 < limit0)
2305 case 0: /* Pad, just stop */
2306 opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0 + 1);
2310 if (hm->trace[type0])
2312 s = (*hm->trace[type0]) (s, opt0);
2317 format (s, "\n unrecognized option %d length %d", type0,
2321 (ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length +
2322 sizeof (ip6_hop_by_hop_option_t));
2331 format_ip6_hop_by_hop_trace (u8 * s, va_list * args)
2333 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
2334 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
2335 ip6_hop_by_hop_trace_t *t = va_arg (*args, ip6_hop_by_hop_trace_t *);
2336 ip6_hop_by_hop_header_t *hbh0;
2337 ip6_hop_by_hop_option_t *opt0, *limit0;
2338 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2342 hbh0 = (ip6_hop_by_hop_header_t *) t->option_data;
2344 s = format (s, "IP6_HOP_BY_HOP: next index %d len %d traced %d",
2345 t->next_index, (hbh0->length + 1) << 3, t->trace_len);
2347 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2348 limit0 = (ip6_hop_by_hop_option_t *) ((u8 *) hbh0) + t->trace_len;
2350 while (opt0 < limit0)
2355 case 0: /* Pad, just stop */
2356 opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0) + 1;
2360 if (hm->trace[type0])
2362 s = (*hm->trace[type0]) (s, opt0);
2367 format (s, "\n unrecognized option %d length %d", type0,
2371 (ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length +
2372 sizeof (ip6_hop_by_hop_option_t));
2380 ip6_scan_hbh_options (vlib_buffer_t * b0,
2382 ip6_hop_by_hop_header_t * hbh0,
2383 ip6_hop_by_hop_option_t * opt0,
2384 ip6_hop_by_hop_option_t * limit0, u32 * next0)
2386 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2390 while (opt0 < limit0)
2396 opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0) + 1;
2401 if (hm->options[type0])
2403 if ((*hm->options[type0]) (b0, ip0, opt0) < 0)
2405 error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2411 /* Unrecognized mandatory option, check the two high order bits */
2412 switch (opt0->type & HBH_OPTION_TYPE_HIGH_ORDER_BITS)
2414 case HBH_OPTION_TYPE_SKIP_UNKNOWN:
2416 case HBH_OPTION_TYPE_DISCARD_UNKNOWN:
2417 error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2418 *next0 = IP_LOOKUP_NEXT_DROP;
2420 case HBH_OPTION_TYPE_DISCARD_UNKNOWN_ICMP:
2421 error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2422 *next0 = IP_LOOKUP_NEXT_ICMP_ERROR;
2423 icmp6_error_set_vnet_buffer (b0, ICMP6_parameter_problem,
2424 ICMP6_parameter_problem_unrecognized_option,
2425 (u8 *) opt0 - (u8 *) ip0);
2427 case HBH_OPTION_TYPE_DISCARD_UNKNOWN_ICMP_NOT_MCAST:
2428 error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2429 if (!ip6_address_is_multicast (&ip0->dst_address))
2431 *next0 = IP_LOOKUP_NEXT_ICMP_ERROR;
2432 icmp6_error_set_vnet_buffer (b0,
2433 ICMP6_parameter_problem,
2434 ICMP6_parameter_problem_unrecognized_option,
2435 (u8 *) opt0 - (u8 *) ip0);
2439 *next0 = IP_LOOKUP_NEXT_DROP;
2447 (ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length +
2448 sizeof (ip6_hop_by_hop_option_t));
2454 * Process the Hop-by-Hop Options header
2456 VLIB_NODE_FN (ip6_hop_by_hop_node) (vlib_main_t * vm,
2457 vlib_node_runtime_t * node,
2458 vlib_frame_t * frame)
2460 vlib_node_runtime_t *error_node =
2461 vlib_node_get_runtime (vm, ip6_hop_by_hop_node.index);
2462 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2463 u32 n_left_from, *from, *to_next;
2464 ip_lookup_next_t next_index;
2466 from = vlib_frame_vector_args (frame);
2467 n_left_from = frame->n_vectors;
2468 next_index = node->cached_next_index;
2470 while (n_left_from > 0)
2474 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
2476 while (n_left_from >= 4 && n_left_to_next >= 2)
2479 vlib_buffer_t *b0, *b1;
2481 ip6_header_t *ip0, *ip1;
2482 ip6_hop_by_hop_header_t *hbh0, *hbh1;
2483 ip6_hop_by_hop_option_t *opt0, *limit0, *opt1, *limit1;
2484 u8 error0 = 0, error1 = 0;
2486 /* Prefetch next iteration. */
2488 vlib_buffer_t *p2, *p3;
2490 p2 = vlib_get_buffer (vm, from[2]);
2491 p3 = vlib_get_buffer (vm, from[3]);
2493 vlib_prefetch_buffer_header (p2, LOAD);
2494 vlib_prefetch_buffer_header (p3, LOAD);
2496 CLIB_PREFETCH (p2->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
2497 CLIB_PREFETCH (p3->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
2500 /* Speculatively enqueue b0, b1 to the current next frame */
2501 to_next[0] = bi0 = from[0];
2502 to_next[1] = bi1 = from[1];
2506 n_left_to_next -= 2;
2508 b0 = vlib_get_buffer (vm, bi0);
2509 b1 = vlib_get_buffer (vm, bi1);
2511 /* Default use the next_index from the adjacency. A HBH option rarely redirects to a different node */
2512 u32 adj_index0 = vnet_buffer (b0)->ip.adj_index[VLIB_TX];
2513 ip_adjacency_t *adj0 = adj_get (adj_index0);
2514 u32 adj_index1 = vnet_buffer (b1)->ip.adj_index[VLIB_TX];
2515 ip_adjacency_t *adj1 = adj_get (adj_index1);
2517 /* Default use the next_index from the adjacency. A HBH option rarely redirects to a different node */
2518 next0 = adj0->lookup_next_index;
2519 next1 = adj1->lookup_next_index;
2521 ip0 = vlib_buffer_get_current (b0);
2522 ip1 = vlib_buffer_get_current (b1);
2523 hbh0 = (ip6_hop_by_hop_header_t *) (ip0 + 1);
2524 hbh1 = (ip6_hop_by_hop_header_t *) (ip1 + 1);
2525 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2526 opt1 = (ip6_hop_by_hop_option_t *) (hbh1 + 1);
2528 (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 +
2529 ((hbh0->length + 1) << 3));
2531 (ip6_hop_by_hop_option_t *) ((u8 *) hbh1 +
2532 ((hbh1->length + 1) << 3));
2535 * Basic validity checks
2537 if ((hbh0->length + 1) << 3 >
2538 clib_net_to_host_u16 (ip0->payload_length))
2540 error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2541 next0 = IP_LOOKUP_NEXT_DROP;
2544 /* Scan the set of h-b-h options, process ones that we understand */
2545 error0 = ip6_scan_hbh_options (b0, ip0, hbh0, opt0, limit0, &next0);
2547 if ((hbh1->length + 1) << 3 >
2548 clib_net_to_host_u16 (ip1->payload_length))
2550 error1 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2551 next1 = IP_LOOKUP_NEXT_DROP;
2554 /* Scan the set of h-b-h options, process ones that we understand */
2555 error1 = ip6_scan_hbh_options (b1, ip1, hbh1, opt1, limit1, &next1);
2558 /* Has the classifier flagged this buffer for special treatment? */
2561 && (vnet_buffer (b0)->l2_classify.opaque_index & OI_DECAP)))
2562 next0 = hm->next_override;
2564 /* Has the classifier flagged this buffer for special treatment? */
2567 && (vnet_buffer (b1)->l2_classify.opaque_index & OI_DECAP)))
2568 next1 = hm->next_override;
2570 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)))
2572 if (b0->flags & VLIB_BUFFER_IS_TRACED)
2574 ip6_hop_by_hop_trace_t *t =
2575 vlib_add_trace (vm, node, b0, sizeof (*t));
2576 u32 trace_len = (hbh0->length + 1) << 3;
2577 t->next_index = next0;
2578 /* Capture the h-b-h option verbatim */
2581 ARRAY_LEN (t->option_data) ? trace_len :
2582 ARRAY_LEN (t->option_data);
2583 t->trace_len = trace_len;
2584 clib_memcpy_fast (t->option_data, hbh0, trace_len);
2586 if (b1->flags & VLIB_BUFFER_IS_TRACED)
2588 ip6_hop_by_hop_trace_t *t =
2589 vlib_add_trace (vm, node, b1, sizeof (*t));
2590 u32 trace_len = (hbh1->length + 1) << 3;
2591 t->next_index = next1;
2592 /* Capture the h-b-h option verbatim */
2595 ARRAY_LEN (t->option_data) ? trace_len :
2596 ARRAY_LEN (t->option_data);
2597 t->trace_len = trace_len;
2598 clib_memcpy_fast (t->option_data, hbh1, trace_len);
2603 b0->error = error_node->errors[error0];
2604 b1->error = error_node->errors[error1];
2606 /* verify speculative enqueue, maybe switch current next frame */
2607 vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
2608 n_left_to_next, bi0, bi1, next0,
2612 while (n_left_from > 0 && n_left_to_next > 0)
2618 ip6_hop_by_hop_header_t *hbh0;
2619 ip6_hop_by_hop_option_t *opt0, *limit0;
2622 /* Speculatively enqueue b0 to the current next frame */
2628 n_left_to_next -= 1;
2630 b0 = vlib_get_buffer (vm, bi0);
2632 * Default use the next_index from the adjacency.
2633 * A HBH option rarely redirects to a different node
2635 u32 adj_index0 = vnet_buffer (b0)->ip.adj_index[VLIB_TX];
2636 ip_adjacency_t *adj0 = adj_get (adj_index0);
2637 next0 = adj0->lookup_next_index;
2639 ip0 = vlib_buffer_get_current (b0);
2640 hbh0 = (ip6_hop_by_hop_header_t *) (ip0 + 1);
2641 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2643 (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 +
2644 ((hbh0->length + 1) << 3));
2647 * Basic validity checks
2649 if ((hbh0->length + 1) << 3 >
2650 clib_net_to_host_u16 (ip0->payload_length))
2652 error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2653 next0 = IP_LOOKUP_NEXT_DROP;
2657 /* Scan the set of h-b-h options, process ones that we understand */
2658 error0 = ip6_scan_hbh_options (b0, ip0, hbh0, opt0, limit0, &next0);
2661 /* Has the classifier flagged this buffer for special treatment? */
2664 && (vnet_buffer (b0)->l2_classify.opaque_index & OI_DECAP)))
2665 next0 = hm->next_override;
2667 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
2669 ip6_hop_by_hop_trace_t *t =
2670 vlib_add_trace (vm, node, b0, sizeof (*t));
2671 u32 trace_len = (hbh0->length + 1) << 3;
2672 t->next_index = next0;
2673 /* Capture the h-b-h option verbatim */
2676 ARRAY_LEN (t->option_data) ? trace_len :
2677 ARRAY_LEN (t->option_data);
2678 t->trace_len = trace_len;
2679 clib_memcpy_fast (t->option_data, hbh0, trace_len);
2682 b0->error = error_node->errors[error0];
2684 /* verify speculative enqueue, maybe switch current next frame */
2685 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
2686 n_left_to_next, bi0, next0);
2688 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2690 return frame->n_vectors;
2694 VLIB_REGISTER_NODE (ip6_hop_by_hop_node) =
2696 .name = "ip6-hop-by-hop",
2697 .sibling_of = "ip6-lookup",
2698 .vector_size = sizeof (u32),
2699 .format_trace = format_ip6_hop_by_hop_trace,
2700 .type = VLIB_NODE_TYPE_INTERNAL,
2701 .n_errors = ARRAY_LEN (ip6_hop_by_hop_error_strings),
2702 .error_strings = ip6_hop_by_hop_error_strings,
2707 static clib_error_t *
2708 ip6_hop_by_hop_init (vlib_main_t * vm)
2710 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2711 clib_memset (hm->options, 0, sizeof (hm->options));
2712 clib_memset (hm->trace, 0, sizeof (hm->trace));
2713 hm->next_override = IP6_LOOKUP_NEXT_POP_HOP_BY_HOP;
2717 VLIB_INIT_FUNCTION (ip6_hop_by_hop_init);
2719 #ifndef CLIB_MARCH_VARIANT
2721 ip6_hbh_set_next_override (uword next)
2723 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2725 hm->next_override = next;
2729 ip6_hbh_register_option (u8 option,
2730 int options (vlib_buffer_t * b, ip6_header_t * ip,
2731 ip6_hop_by_hop_option_t * opt),
2732 u8 * trace (u8 * s, ip6_hop_by_hop_option_t * opt))
2734 ip6_main_t *im = &ip6_main;
2735 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2737 ASSERT ((u32) option < ARRAY_LEN (hm->options));
2739 /* Already registered */
2740 if (hm->options[option])
2743 hm->options[option] = options;
2744 hm->trace[option] = trace;
2746 /* Set global variable */
2747 im->hbh_enabled = 1;
2753 ip6_hbh_unregister_option (u8 option)
2755 ip6_main_t *im = &ip6_main;
2756 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2758 ASSERT ((u32) option < ARRAY_LEN (hm->options));
2760 /* Not registered */
2761 if (!hm->options[option])
2764 hm->options[option] = NULL;
2765 hm->trace[option] = NULL;
2767 /* Disable global knob if this was the last option configured */
2770 for (i = 0; i < 256; i++)
2772 if (hm->options[option])
2779 im->hbh_enabled = 0;
2784 /* Global IP6 main. */
2785 ip6_main_t ip6_main;
2788 static clib_error_t *
2789 ip6_lookup_init (vlib_main_t * vm)
2791 ip6_main_t *im = &ip6_main;
2792 clib_error_t *error;
2795 if ((error = vlib_call_init_function (vm, vnet_feature_init)))
2798 for (i = 0; i < ARRAY_LEN (im->fib_masks); i++)
2805 for (j = 0; j < i0; j++)
2806 im->fib_masks[i].as_u32[j] = ~0;
2809 im->fib_masks[i].as_u32[i0] =
2810 clib_host_to_net_u32 (pow2_mask (i1) << (32 - i1));
2813 ip_lookup_init (&im->lookup_main, /* is_ip6 */ 1);
2815 /* Create FIB with index 0 and table id of 0. */
2816 fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6, 0,
2817 FIB_SOURCE_DEFAULT_ROUTE);
2818 mfib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6, 0,
2819 MFIB_SOURCE_DEFAULT_ROUTE);
2823 pn = pg_get_node (ip6_lookup_node.index);
2824 pn->unformat_edit = unformat_pg_ip6_header;
2827 /* Unless explicitly configured, don't process HBH options */
2828 im->hbh_enabled = 0;
2833 VLIB_INIT_FUNCTION (ip6_lookup_init);
2835 #ifndef CLIB_MARCH_VARIANT
2837 vnet_set_ip6_flow_hash (u32 table_id, u32 flow_hash_config)
2841 fib_index = fib_table_find (FIB_PROTOCOL_IP6, table_id);
2843 if (~0 == fib_index)
2844 return VNET_API_ERROR_NO_SUCH_FIB;
2846 fib_table_set_flow_hash_config (fib_index, FIB_PROTOCOL_IP6,
2853 static clib_error_t *
2854 set_ip6_flow_hash_command_fn (vlib_main_t * vm,
2855 unformat_input_t * input,
2856 vlib_cli_command_t * cmd)
2860 u32 flow_hash_config = 0;
2863 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
2865 if (unformat (input, "table %d", &table_id))
2868 else if (unformat (input, #a)) { flow_hash_config |= v; matched=1;}
2869 foreach_flow_hash_bit
2876 return clib_error_return (0, "unknown input `%U'",
2877 format_unformat_error, input);
2879 rv = vnet_set_ip6_flow_hash (table_id, flow_hash_config);
2886 return clib_error_return (0, "no such FIB table %d", table_id);
2889 clib_warning ("BUG: illegal flow hash config 0x%x", flow_hash_config);
2897 * Configure the set of IPv6 fields used by the flow hash.
2901 * Example of how to set the flow hash on a given table:
2902 * @cliexcmd{set ip6 flow-hash table 8 dst sport dport proto}
2904 * Example of display the configured flow hash:
2905 * @cliexstart{show ip6 fib}
2906 * ipv6-VRF:0, fib_index 0, flow hash: src dst sport dport proto
2909 * [@0]: dpo-load-balance: [index:5 buckets:1 uRPF:5 to:[0:0]]
2910 * [0] [@0]: dpo-drop ip6
2913 * [@0]: dpo-load-balance: [index:10 buckets:1 uRPF:10 to:[0:0]]
2914 * [0] [@2]: dpo-receive
2917 * [@0]: dpo-load-balance: [index:8 buckets:1 uRPF:8 to:[0:0]]
2918 * [0] [@2]: dpo-receive
2921 * [@0]: dpo-load-balance: [index:7 buckets:1 uRPF:7 to:[0:0]]
2922 * [0] [@2]: dpo-receive
2925 * [@0]: dpo-load-balance: [index:9 buckets:1 uRPF:9 to:[0:0]]
2926 * [0] [@2]: dpo-receive
2927 * ff02::1:ff00:0/104
2929 * [@0]: dpo-load-balance: [index:6 buckets:1 uRPF:6 to:[0:0]]
2930 * [0] [@2]: dpo-receive
2931 * ipv6-VRF:8, fib_index 1, flow hash: dst sport dport proto
2934 * [@0]: dpo-load-balance: [index:21 buckets:1 uRPF:20 to:[0:0]]
2935 * [0] [@0]: dpo-drop ip6
2938 * [@0]: dpo-load-balance: [index:27 buckets:1 uRPF:26 to:[0:0]]
2939 * [0] [@4]: ipv6-glean: af_packet0
2942 * [@0]: dpo-load-balance: [index:28 buckets:1 uRPF:27 to:[0:0]]
2943 * [0] [@2]: dpo-receive: @::a:1:1:0:7 on af_packet0
2946 * [@0]: dpo-load-balance: [index:26 buckets:1 uRPF:25 to:[0:0]]
2947 * [0] [@2]: dpo-receive
2948 * fe80::fe:3eff:fe3e:9222/128
2950 * [@0]: dpo-load-balance: [index:29 buckets:1 uRPF:28 to:[0:0]]
2951 * [0] [@2]: dpo-receive: fe80::fe:3eff:fe3e:9222 on af_packet0
2954 * [@0]: dpo-load-balance: [index:24 buckets:1 uRPF:23 to:[0:0]]
2955 * [0] [@2]: dpo-receive
2958 * [@0]: dpo-load-balance: [index:23 buckets:1 uRPF:22 to:[0:0]]
2959 * [0] [@2]: dpo-receive
2962 * [@0]: dpo-load-balance: [index:25 buckets:1 uRPF:24 to:[0:0]]
2963 * [0] [@2]: dpo-receive
2964 * ff02::1:ff00:0/104
2966 * [@0]: dpo-load-balance: [index:22 buckets:1 uRPF:21 to:[0:0]]
2967 * [0] [@2]: dpo-receive
2972 VLIB_CLI_COMMAND (set_ip6_flow_hash_command, static) =
2974 .path = "set ip6 flow-hash",
2976 "set ip6 flow-hash table <table-id> [src] [dst] [sport] [dport] [proto] [reverse]",
2977 .function = set_ip6_flow_hash_command_fn,
2981 static clib_error_t *
2982 show_ip6_local_command_fn (vlib_main_t * vm,
2983 unformat_input_t * input, vlib_cli_command_t * cmd)
2985 ip6_main_t *im = &ip6_main;
2986 ip_lookup_main_t *lm = &im->lookup_main;
2989 vlib_cli_output (vm, "Protocols handled by ip6_local");
2990 for (i = 0; i < ARRAY_LEN (lm->local_next_by_ip_protocol); i++)
2992 if (lm->local_next_by_ip_protocol[i] != IP_LOCAL_NEXT_PUNT)
2995 u32 node_index = vlib_get_node (vm,
2996 ip6_local_node.index)->
2997 next_nodes[lm->local_next_by_ip_protocol[i]];
2998 vlib_cli_output (vm, "%d: %U", i, format_vlib_node_name, vm,
3008 * Display the set of protocols handled by the local IPv6 stack.
3011 * Example of how to display local protocol table:
3012 * @cliexstart{show ip6 local}
3013 * Protocols handled by ip6_local
3021 VLIB_CLI_COMMAND (show_ip6_local, static) =
3023 .path = "show ip6 local",
3024 .function = show_ip6_local_command_fn,
3025 .short_help = "show ip6 local",
3029 #ifndef CLIB_MARCH_VARIANT
3031 vnet_set_ip6_classify_intfc (vlib_main_t * vm, u32 sw_if_index,
3034 vnet_main_t *vnm = vnet_get_main ();
3035 vnet_interface_main_t *im = &vnm->interface_main;
3036 ip6_main_t *ipm = &ip6_main;
3037 ip_lookup_main_t *lm = &ipm->lookup_main;
3038 vnet_classify_main_t *cm = &vnet_classify_main;
3039 ip6_address_t *if_addr;
3041 if (pool_is_free_index (im->sw_interfaces, sw_if_index))
3042 return VNET_API_ERROR_NO_MATCHING_INTERFACE;
3044 if (table_index != ~0 && pool_is_free_index (cm->tables, table_index))
3045 return VNET_API_ERROR_NO_SUCH_ENTRY;
3047 vec_validate (lm->classify_table_index_by_sw_if_index, sw_if_index);
3048 lm->classify_table_index_by_sw_if_index[sw_if_index] = table_index;
3050 if_addr = ip6_interface_first_address (ipm, sw_if_index);
3052 if (NULL != if_addr)
3054 fib_prefix_t pfx = {
3056 .fp_proto = FIB_PROTOCOL_IP6,
3057 .fp_addr.ip6 = *if_addr,
3061 fib_index = fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4,
3065 if (table_index != (u32) ~ 0)
3067 dpo_id_t dpo = DPO_INVALID;
3072 classify_dpo_create (DPO_PROTO_IP6, table_index));
3074 fib_table_entry_special_dpo_add (fib_index,
3076 FIB_SOURCE_CLASSIFY,
3077 FIB_ENTRY_FLAG_NONE, &dpo);
3082 fib_table_entry_special_remove (fib_index,
3083 &pfx, FIB_SOURCE_CLASSIFY);
3091 static clib_error_t *
3092 set_ip6_classify_command_fn (vlib_main_t * vm,
3093 unformat_input_t * input,
3094 vlib_cli_command_t * cmd)
3096 u32 table_index = ~0;
3097 int table_index_set = 0;
3098 u32 sw_if_index = ~0;
3101 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
3103 if (unformat (input, "table-index %d", &table_index))
3104 table_index_set = 1;
3105 else if (unformat (input, "intfc %U", unformat_vnet_sw_interface,
3106 vnet_get_main (), &sw_if_index))
3112 if (table_index_set == 0)
3113 return clib_error_return (0, "classify table-index must be specified");
3115 if (sw_if_index == ~0)
3116 return clib_error_return (0, "interface / subif must be specified");
3118 rv = vnet_set_ip6_classify_intfc (vm, sw_if_index, table_index);
3125 case VNET_API_ERROR_NO_MATCHING_INTERFACE:
3126 return clib_error_return (0, "No such interface");
3128 case VNET_API_ERROR_NO_SUCH_ENTRY:
3129 return clib_error_return (0, "No such classifier table");
3135 * Assign a classification table to an interface. The classification
3136 * table is created using the '<em>classify table</em>' and '<em>classify session</em>'
3137 * commands. Once the table is create, use this command to filter packets
3141 * Example of how to assign a classification table to an interface:
3142 * @cliexcmd{set ip6 classify intfc GigabitEthernet2/0/0 table-index 1}
3145 VLIB_CLI_COMMAND (set_ip6_classify_command, static) =
3147 .path = "set ip6 classify",
3149 "set ip6 classify intfc <interface> table-index <classify-idx>",
3150 .function = set_ip6_classify_command_fn,
3155 * fd.io coding-style-patch-verification: ON
3158 * eval: (c-set-style "gnu")