2 * Copyright (c) 2016 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
16 * ip/ip6_forward.c: IP v6 forwarding
18 * Copyright (c) 2008 Eliot Dresselhaus
20 * Permission is hereby granted, free of charge, to any person obtaining
21 * a copy of this software and associated documentation files (the
22 * "Software"), to deal in the Software without restriction, including
23 * without limitation the rights to use, copy, modify, merge, publish,
24 * distribute, sublicense, and/or sell copies of the Software, and to
25 * permit persons to whom the Software is furnished to do so, subject to
26 * the following conditions:
28 * The above copyright notice and this permission notice shall be
29 * included in all copies or substantial portions of the Software.
31 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
32 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
33 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
34 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
35 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
36 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
37 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
40 #include <vnet/vnet.h>
41 #include <vnet/ip/ip.h>
42 #include <vnet/ip/ip_frag.h>
43 #include <vnet/ip/ip6_link.h>
44 #include <vnet/ethernet/ethernet.h> /* for ethernet_header_t */
45 #include <vnet/srp/srp.h> /* for srp_hw_interface_class */
46 #include <vppinfra/cache.h>
47 #include <vnet/fib/fib_urpf_list.h> /* for FIB uRPF check */
48 #include <vnet/fib/ip6_fib.h>
49 #include <vnet/mfib/ip6_mfib.h>
50 #include <vnet/dpo/load_balance_map.h>
51 #include <vnet/dpo/classify_dpo.h>
52 #include <vnet/classify/vnet_classify.h>
54 #ifndef CLIB_MARCH_VARIANT
55 #include <vppinfra/bihash_template.c>
57 #include <vnet/ip/ip6_forward.h>
58 #include <vnet/interface_output.h>
60 /* Flag used by IOAM code. Classifier sets it pop-hop-by-hop checks it */
61 #define OI_DECAP 0x80000000
64 ip6_add_interface_prefix_routes (ip6_main_t * im,
67 ip6_address_t * address, u32 address_length)
69 ip_lookup_main_t *lm = &im->lookup_main;
70 ip_interface_prefix_t *if_prefix;
73 ip_interface_prefix_key_t key = {
75 .fp_len = address_length,
76 .fp_proto = FIB_PROTOCOL_IP6,
79 address->as_u64[0] & im->fib_masks[address_length].as_u64[0],
80 address->as_u64[1] & im->fib_masks[address_length].as_u64[1],
84 .sw_if_index = sw_if_index,
88 /* If prefix already set on interface, just increment ref count & return */
89 if_prefix = ip_get_interface_prefix (lm, &key);
92 if_prefix->ref_count += 1;
96 /* New prefix - allocate a pool entry, initialize it, add to the hash */
97 pool_get (lm->if_prefix_pool, if_prefix);
98 if_prefix->ref_count = 1;
99 clib_memcpy (&if_prefix->key, &key, sizeof (key));
100 mhash_set (&lm->prefix_to_if_prefix_index, &key,
101 if_prefix - lm->if_prefix_pool, 0 /* old value */ );
103 /* length < 128 - add glean */
104 if (address_length < 128)
106 /* set the glean route for the prefix */
107 fib_table_entry_update_one_path (fib_index, &key.prefix,
108 FIB_SOURCE_INTERFACE,
109 (FIB_ENTRY_FLAG_CONNECTED |
110 FIB_ENTRY_FLAG_ATTACHED),
112 /* No next-hop address */
114 /* invalid FIB index */
116 /* no out-label stack */
117 NULL, FIB_ROUTE_PATH_FLAG_NONE);
122 ip6_add_interface_routes (vnet_main_t * vnm, u32 sw_if_index,
123 ip6_main_t * im, u32 fib_index,
124 ip_interface_address_t * a)
126 ip_lookup_main_t *lm = &im->lookup_main;
127 ip6_address_t *address = ip_interface_address_get_address (lm, a);
129 .fp_len = a->address_length,
130 .fp_proto = FIB_PROTOCOL_IP6,
131 .fp_addr.ip6 = *address,
134 /* set special routes for the prefix if needed */
135 ip6_add_interface_prefix_routes (im, sw_if_index, fib_index,
136 address, a->address_length);
139 if (sw_if_index < vec_len (lm->classify_table_index_by_sw_if_index))
141 u32 classify_table_index =
142 lm->classify_table_index_by_sw_if_index[sw_if_index];
143 if (classify_table_index != (u32) ~ 0)
145 dpo_id_t dpo = DPO_INVALID;
150 classify_dpo_create (DPO_PROTO_IP6, classify_table_index));
152 fib_table_entry_special_dpo_add (fib_index,
155 FIB_ENTRY_FLAG_NONE, &dpo);
160 fib_table_entry_update_one_path (fib_index, &pfx,
161 FIB_SOURCE_INTERFACE,
162 (FIB_ENTRY_FLAG_CONNECTED |
163 FIB_ENTRY_FLAG_LOCAL),
167 1, NULL, FIB_ROUTE_PATH_FLAG_NONE);
171 ip6_del_interface_prefix_routes (ip6_main_t * im,
174 ip6_address_t * address, u32 address_length)
176 ip_lookup_main_t *lm = &im->lookup_main;
177 ip_interface_prefix_t *if_prefix;
180 ip_interface_prefix_key_t key = {
182 .fp_len = address_length,
183 .fp_proto = FIB_PROTOCOL_IP6,
186 address->as_u64[0] & im->fib_masks[address_length].as_u64[0],
187 address->as_u64[1] & im->fib_masks[address_length].as_u64[1],
191 .sw_if_index = sw_if_index,
195 if_prefix = ip_get_interface_prefix (lm, &key);
198 clib_warning ("Prefix not found while deleting %U",
199 format_ip4_address_and_length, address, address_length);
203 /* If not deleting last intf addr in prefix, decrement ref count & return */
204 if_prefix->ref_count -= 1;
205 if (if_prefix->ref_count > 0)
208 /* length <= 128, delete glean route */
209 if (address_length <= 128)
211 /* remove glean route for prefix */
212 fib_table_entry_delete (fib_index, &key.prefix, FIB_SOURCE_INTERFACE);
215 mhash_unset (&lm->prefix_to_if_prefix_index, &key, 0 /* old_value */ );
216 pool_put (lm->if_prefix_pool, if_prefix);
220 ip6_del_interface_routes (u32 sw_if_index, ip6_main_t * im,
222 ip6_address_t * address, u32 address_length)
226 .fp_proto = FIB_PROTOCOL_IP6,
227 .fp_addr.ip6 = *address,
230 /* delete special routes for the prefix if needed */
231 ip6_del_interface_prefix_routes (im, sw_if_index, fib_index,
232 address, address_length);
234 fib_table_entry_delete (fib_index, &pfx, FIB_SOURCE_INTERFACE);
237 #ifndef CLIB_MARCH_VARIANT
239 ip6_sw_interface_enable_disable (u32 sw_if_index, u32 is_enable)
241 ip6_main_t *im = &ip6_main;
242 vnet_main_t *vnm = vnet_get_main ();
243 vnet_hw_interface_t *hi = vnet_get_sup_hw_interface (vnm, sw_if_index);
245 vec_validate_init_empty (im->ip_enabled_by_sw_if_index, sw_if_index, 0);
248 * enable/disable only on the 1<->0 transition
252 if (1 != ++im->ip_enabled_by_sw_if_index[sw_if_index])
257 /* The ref count is 0 when an address is removed from an interface that has
258 * no address - this is not a ciritical error */
259 if (0 == im->ip_enabled_by_sw_if_index[sw_if_index] ||
260 0 != --im->ip_enabled_by_sw_if_index[sw_if_index])
264 vnet_feature_enable_disable ("ip6-unicast", "ip6-not-enabled", sw_if_index,
267 vnet_feature_enable_disable ("ip6-multicast", "ip6-not-enabled",
268 sw_if_index, !is_enable, 0, 0);
272 else if (hi->l3_if_count)
276 /* get first interface address */
278 ip6_interface_first_address (ip6_main_t * im, u32 sw_if_index)
280 ip_lookup_main_t *lm = &im->lookup_main;
281 ip_interface_address_t *ia = 0;
282 ip6_address_t *result = 0;
285 foreach_ip_interface_address (lm, ia, sw_if_index,
286 1 /* honor unnumbered */,
288 ip6_address_t * a = ip_interface_address_get_address (lm, ia);
297 ip6_add_del_interface_address (vlib_main_t * vm,
299 ip6_address_t * address,
300 u32 address_length, u32 is_del)
302 vnet_main_t *vnm = vnet_get_main ();
303 ip6_main_t *im = &ip6_main;
304 ip_lookup_main_t *lm = &im->lookup_main;
305 clib_error_t *error = NULL;
306 u32 if_address_index;
307 ip6_address_fib_t ip6_af, *addr_fib = 0;
308 const ip6_address_t *ll_addr;
310 /* local0 interface doesn't support IP addressing */
311 if (sw_if_index == 0)
314 clib_error_create ("local0 interface doesn't support IP addressing");
317 if (ip6_address_is_link_local_unicast (address))
319 if (address_length != 128)
321 vnm->api_errno = VNET_API_ERROR_ADDRESS_LENGTH_MISMATCH;
324 ("prefix length of link-local address must be 128");
330 rv = ip6_link_set_local_address (sw_if_index, address);
335 return clib_error_create ("address not assignable");
340 ll_addr = ip6_get_link_local_address (sw_if_index);
341 if (ip6_address_is_equal (ll_addr, address))
343 vnm->api_errno = VNET_API_ERROR_ADDRESS_NOT_DELETABLE;
344 return clib_error_create ("address not deletable");
348 vnm->api_errno = VNET_API_ERROR_ADDRESS_NOT_FOUND_FOR_INTERFACE;
349 return clib_error_create ("address not found");
356 vec_validate (im->fib_index_by_sw_if_index, sw_if_index);
357 vec_validate (im->mfib_index_by_sw_if_index, sw_if_index);
359 ip6_addr_fib_init (&ip6_af, address,
360 vec_elt (im->fib_index_by_sw_if_index, sw_if_index));
361 vec_add1 (addr_fib, ip6_af);
366 /* When adding an address check that it does not conflict
367 with an existing address on any interface in this table. */
368 ip_interface_address_t *ia;
369 vnet_sw_interface_t *sif;
371 pool_foreach (sif, vnm->interface_main.sw_interfaces)
373 if (im->fib_index_by_sw_if_index[sw_if_index] ==
374 im->fib_index_by_sw_if_index[sif->sw_if_index])
376 foreach_ip_interface_address
377 (&im->lookup_main, ia, sif->sw_if_index,
378 0 /* honor unnumbered */ ,
381 ip_interface_address_get_address
382 (&im->lookup_main, ia);
384 if (ip6_destination_matches_route
385 (im, address, x, ia->address_length) ||
386 ip6_destination_matches_route (im,
391 /* an intf may have >1 addr from the same prefix */
392 if ((sw_if_index == sif->sw_if_index) &&
393 (ia->address_length == address_length) &&
394 !ip6_address_is_equal (x, address))
397 if (ia->flags & IP_INTERFACE_ADDRESS_FLAG_STALE)
398 /* if the address we're comparing against is stale
399 * then the CP has not added this one back yet, maybe
400 * it never will, so we have to assume it won't and
401 * ignore it. if it does add it back, then it will fail
402 * because this one is now present */
405 /* error if the length or intf was different */
406 vnm->api_errno = VNET_API_ERROR_DUPLICATE_IF_ADDRESS;
407 error = clib_error_create
408 ("failed to add %U which conflicts with %U for interface %U",
409 format_ip6_address_and_length, address,
411 format_ip6_address_and_length, x,
413 format_vnet_sw_if_index_name, vnm,
423 if_address_index = ip_interface_address_find (lm, addr_fib, address_length);
427 if (~0 == if_address_index)
429 vnm->api_errno = VNET_API_ERROR_ADDRESS_NOT_FOUND_FOR_INTERFACE;
430 error = clib_error_create ("%U not found for interface %U",
431 lm->format_address_and_length,
432 addr_fib, address_length,
433 format_vnet_sw_if_index_name, vnm,
438 error = ip_interface_address_del (lm, vnm, if_address_index, addr_fib,
439 address_length, sw_if_index);
445 if (~0 != if_address_index)
447 ip_interface_address_t *ia;
449 ia = pool_elt_at_index (lm->if_address_pool, if_address_index);
451 if (ia->flags & IP_INTERFACE_ADDRESS_FLAG_STALE)
453 if (ia->sw_if_index == sw_if_index)
455 /* re-adding an address during the replace action.
456 * consdier this the update. clear the flag and
458 ia->flags &= ~IP_INTERFACE_ADDRESS_FLAG_STALE;
463 /* The prefix is moving from one interface to another.
464 * delete the stale and add the new */
465 ip6_add_del_interface_address (vm,
467 address, address_length, 1);
469 error = ip_interface_address_add (lm, sw_if_index,
470 addr_fib, address_length,
476 vnm->api_errno = VNET_API_ERROR_DUPLICATE_IF_ADDRESS;
477 error = clib_error_create
478 ("Prefix %U already found on interface %U",
479 lm->format_address_and_length, addr_fib, address_length,
480 format_vnet_sw_if_index_name, vnm, ia->sw_if_index);
484 error = ip_interface_address_add (lm, sw_if_index,
485 addr_fib, address_length,
492 ip6_sw_interface_enable_disable (sw_if_index, !is_del);
494 ip6_link_enable (sw_if_index, NULL);
496 /* intf addr routes are added/deleted on admin up/down */
497 if (vnet_sw_interface_is_admin_up (vnm, sw_if_index))
500 ip6_del_interface_routes (sw_if_index,
501 im, ip6_af.fib_index, address,
504 ip6_add_interface_routes (vnm, sw_if_index,
505 im, ip6_af.fib_index,
506 pool_elt_at_index (lm->if_address_pool,
510 ip6_add_del_interface_address_callback_t *cb;
511 vec_foreach (cb, im->add_del_interface_address_callbacks)
512 cb->function (im, cb->function_opaque, sw_if_index,
513 address, address_length, if_address_index, is_del);
516 ip6_link_disable (sw_if_index);
525 static clib_error_t *
526 ip6_sw_interface_admin_up_down (vnet_main_t * vnm, u32 sw_if_index, u32 flags)
528 ip6_main_t *im = &ip6_main;
529 ip_interface_address_t *ia;
531 u32 is_admin_up, fib_index;
533 /* Fill in lookup tables with default table (0). */
534 vec_validate (im->fib_index_by_sw_if_index, sw_if_index);
536 vec_validate_init_empty (im->
537 lookup_main.if_address_pool_index_by_sw_if_index,
540 is_admin_up = (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) != 0;
542 fib_index = vec_elt (im->fib_index_by_sw_if_index, sw_if_index);
545 foreach_ip_interface_address (&im->lookup_main, ia, sw_if_index,
546 0 /* honor unnumbered */,
548 a = ip_interface_address_get_address (&im->lookup_main, ia);
550 ip6_add_interface_routes (vnm, sw_if_index,
554 ip6_del_interface_routes (sw_if_index, im, fib_index,
555 a, ia->address_length);
562 VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION (ip6_sw_interface_admin_up_down);
564 /* Built-in ip6 unicast rx feature path definition */
566 VNET_FEATURE_ARC_INIT (ip6_unicast, static) =
568 .arc_name = "ip6-unicast",
569 .start_nodes = VNET_FEATURES ("ip6-input"),
570 .last_in_arc = "ip6-lookup",
571 .arc_index_ptr = &ip6_main.lookup_main.ucast_feature_arc_index,
574 VNET_FEATURE_INIT (ip6_flow_classify, static) =
576 .arc_name = "ip6-unicast",
577 .node_name = "ip6-flow-classify",
578 .runs_before = VNET_FEATURES ("ip6-inacl"),
581 VNET_FEATURE_INIT (ip6_inacl, static) =
583 .arc_name = "ip6-unicast",
584 .node_name = "ip6-inacl",
585 .runs_before = VNET_FEATURES ("ip6-policer-classify"),
588 VNET_FEATURE_INIT (ip6_policer_classify, static) =
590 .arc_name = "ip6-unicast",
591 .node_name = "ip6-policer-classify",
592 .runs_before = VNET_FEATURES ("ipsec6-input-feature"),
595 VNET_FEATURE_INIT (ip6_ipsec, static) =
597 .arc_name = "ip6-unicast",
598 .node_name = "ipsec6-input-feature",
599 .runs_before = VNET_FEATURES ("l2tp-decap"),
602 VNET_FEATURE_INIT (ip6_l2tp, static) =
604 .arc_name = "ip6-unicast",
605 .node_name = "l2tp-decap",
606 .runs_before = VNET_FEATURES ("vpath-input-ip6"),
609 VNET_FEATURE_INIT (ip6_vpath, static) =
611 .arc_name = "ip6-unicast",
612 .node_name = "vpath-input-ip6",
613 .runs_before = VNET_FEATURES ("ip6-vxlan-bypass"),
616 VNET_FEATURE_INIT (ip6_vxlan_bypass, static) =
618 .arc_name = "ip6-unicast",
619 .node_name = "ip6-vxlan-bypass",
620 .runs_before = VNET_FEATURES ("ip6-lookup"),
623 VNET_FEATURE_INIT (ip6_not_enabled, static) =
625 .arc_name = "ip6-unicast",
626 .node_name = "ip6-not-enabled",
627 .runs_before = VNET_FEATURES ("ip6-lookup"),
630 VNET_FEATURE_INIT (ip6_lookup, static) =
632 .arc_name = "ip6-unicast",
633 .node_name = "ip6-lookup",
634 .runs_before = 0, /*last feature*/
637 /* Built-in ip6 multicast rx feature path definition (none now) */
638 VNET_FEATURE_ARC_INIT (ip6_multicast, static) =
640 .arc_name = "ip6-multicast",
641 .start_nodes = VNET_FEATURES ("ip6-input"),
642 .last_in_arc = "ip6-mfib-forward-lookup",
643 .arc_index_ptr = &ip6_main.lookup_main.mcast_feature_arc_index,
646 VNET_FEATURE_INIT (ip6_vpath_mc, static) = {
647 .arc_name = "ip6-multicast",
648 .node_name = "vpath-input-ip6",
649 .runs_before = VNET_FEATURES ("ip6-mfib-forward-lookup"),
652 VNET_FEATURE_INIT (ip6_not_enabled_mc, static) = {
653 .arc_name = "ip6-multicast",
654 .node_name = "ip6-not-enabled",
655 .runs_before = VNET_FEATURES ("ip6-mfib-forward-lookup"),
658 VNET_FEATURE_INIT (ip6_mc_lookup, static) = {
659 .arc_name = "ip6-multicast",
660 .node_name = "ip6-mfib-forward-lookup",
661 .runs_before = 0, /* last feature */
664 /* Built-in ip4 tx feature path definition */
665 VNET_FEATURE_ARC_INIT (ip6_output, static) =
667 .arc_name = "ip6-output",
668 .start_nodes = VNET_FEATURES ("ip6-rewrite", "ip6-midchain", "ip6-dvr-dpo"),
669 .last_in_arc = "interface-output",
670 .arc_index_ptr = &ip6_main.lookup_main.output_feature_arc_index,
673 VNET_FEATURE_INIT (ip6_outacl, static) = {
674 .arc_name = "ip6-output",
675 .node_name = "ip6-outacl",
676 .runs_before = VNET_FEATURES ("ipsec6-output-feature"),
679 VNET_FEATURE_INIT (ip6_ipsec_output, static) = {
680 .arc_name = "ip6-output",
681 .node_name = "ipsec6-output-feature",
682 .runs_before = VNET_FEATURES ("interface-output"),
685 VNET_FEATURE_INIT (ip6_interface_output, static) = {
686 .arc_name = "ip6-output",
687 .node_name = "interface-output",
688 .runs_before = 0, /* not before any other features */
692 static clib_error_t *
693 ip6_sw_interface_add_del (vnet_main_t * vnm, u32 sw_if_index, u32 is_add)
695 ip6_main_t *im = &ip6_main;
697 vec_validate (im->fib_index_by_sw_if_index, sw_if_index);
698 vec_validate (im->mfib_index_by_sw_if_index, sw_if_index);
702 /* Ensure that IPv6 is disabled */
703 ip6_main_t *im6 = &ip6_main;
704 ip_lookup_main_t *lm6 = &im6->lookup_main;
705 ip_interface_address_t *ia = 0;
706 ip6_address_t *address;
707 vlib_main_t *vm = vlib_get_main ();
709 vnet_sw_interface_update_unnumbered (sw_if_index, ~0, 0);
711 foreach_ip_interface_address (lm6, ia, sw_if_index, 0,
713 address = ip_interface_address_get_address (lm6, ia);
714 ip6_add_del_interface_address(vm, sw_if_index, address, ia->address_length, 1);
717 ip6_mfib_interface_enable_disable (sw_if_index, 0);
720 vnet_feature_enable_disable ("ip6-unicast", "ip6-not-enabled", sw_if_index,
723 vnet_feature_enable_disable ("ip6-multicast", "ip6-not-enabled",
724 sw_if_index, is_add, 0, 0);
726 return /* no error */ 0;
729 VNET_SW_INTERFACE_ADD_DEL_FUNCTION (ip6_sw_interface_add_del);
731 VLIB_NODE_FN (ip6_lookup_node) (vlib_main_t * vm,
732 vlib_node_runtime_t * node,
733 vlib_frame_t * frame)
735 return ip6_lookup_inline (vm, node, frame);
738 static u8 *format_ip6_lookup_trace (u8 * s, va_list * args);
741 VLIB_REGISTER_NODE (ip6_lookup_node) =
743 .name = "ip6-lookup",
744 .vector_size = sizeof (u32),
745 .format_trace = format_ip6_lookup_trace,
746 .n_next_nodes = IP6_LOOKUP_N_NEXT,
747 .next_nodes = IP6_LOOKUP_NEXT_NODES,
751 VLIB_NODE_FN (ip6_load_balance_node) (vlib_main_t * vm,
752 vlib_node_runtime_t * node,
753 vlib_frame_t * frame)
755 vlib_combined_counter_main_t *cm = &load_balance_main.lbm_via_counters;
757 u32 thread_index = vm->thread_index;
758 ip6_main_t *im = &ip6_main;
759 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs;
760 u16 nexts[VLIB_FRAME_SIZE], *next;
762 from = vlib_frame_vector_args (frame);
763 n_left = frame->n_vectors;
766 vlib_get_buffers (vm, from, bufs, n_left);
770 const load_balance_t *lb0, *lb1;
771 const ip6_header_t *ip0, *ip1;
772 u32 lbi0, hc0, lbi1, hc1;
773 const dpo_id_t *dpo0, *dpo1;
775 /* Prefetch next iteration. */
777 vlib_prefetch_buffer_header (b[2], STORE);
778 vlib_prefetch_buffer_header (b[3], STORE);
780 CLIB_PREFETCH (b[2]->data, sizeof (ip0[0]), STORE);
781 CLIB_PREFETCH (b[3]->data, sizeof (ip0[0]), STORE);
784 ip0 = vlib_buffer_get_current (b[0]);
785 ip1 = vlib_buffer_get_current (b[1]);
786 lbi0 = vnet_buffer (b[0])->ip.adj_index[VLIB_TX];
787 lbi1 = vnet_buffer (b[1])->ip.adj_index[VLIB_TX];
789 lb0 = load_balance_get (lbi0);
790 lb1 = load_balance_get (lbi1);
793 * this node is for via FIBs we can re-use the hash value from the
794 * to node if present.
795 * We don't want to use the same hash value at each level in the recursion
796 * graph as that would lead to polarisation
800 if (PREDICT_FALSE (lb0->lb_n_buckets > 1))
802 if (PREDICT_TRUE (vnet_buffer (b[0])->ip.flow_hash))
804 hc0 = vnet_buffer (b[0])->ip.flow_hash =
805 vnet_buffer (b[0])->ip.flow_hash >> 1;
809 hc0 = vnet_buffer (b[0])->ip.flow_hash =
810 ip6_compute_flow_hash (ip0, lb0->lb_hash_config);
812 dpo0 = load_balance_get_fwd_bucket
813 (lb0, (hc0 & (lb0->lb_n_buckets_minus_1)));
817 dpo0 = load_balance_get_bucket_i (lb0, 0);
819 if (PREDICT_FALSE (lb1->lb_n_buckets > 1))
821 if (PREDICT_TRUE (vnet_buffer (b[1])->ip.flow_hash))
823 hc1 = vnet_buffer (b[1])->ip.flow_hash =
824 vnet_buffer (b[1])->ip.flow_hash >> 1;
828 hc1 = vnet_buffer (b[1])->ip.flow_hash =
829 ip6_compute_flow_hash (ip1, lb1->lb_hash_config);
831 dpo1 = load_balance_get_fwd_bucket
832 (lb1, (hc1 & (lb1->lb_n_buckets_minus_1)));
836 dpo1 = load_balance_get_bucket_i (lb1, 0);
839 next[0] = dpo0->dpoi_next_node;
840 next[1] = dpo1->dpoi_next_node;
842 /* Only process the HBH Option Header if explicitly configured to do so */
843 if (PREDICT_FALSE (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
845 next[0] = (dpo_is_adj (dpo0) && im->hbh_enabled) ?
846 (ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next[0];
848 /* Only process the HBH Option Header if explicitly configured to do so */
849 if (PREDICT_FALSE (ip1->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
851 next[1] = (dpo_is_adj (dpo1) && im->hbh_enabled) ?
852 (ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next[1];
855 vnet_buffer (b[0])->ip.adj_index[VLIB_TX] = dpo0->dpoi_index;
856 vnet_buffer (b[1])->ip.adj_index[VLIB_TX] = dpo1->dpoi_index;
858 vlib_increment_combined_counter
859 (cm, thread_index, lbi0, 1, vlib_buffer_length_in_chain (vm, b[0]));
860 vlib_increment_combined_counter
861 (cm, thread_index, lbi1, 1, vlib_buffer_length_in_chain (vm, b[1]));
870 const load_balance_t *lb0;
871 const ip6_header_t *ip0;
872 const dpo_id_t *dpo0;
875 ip0 = vlib_buffer_get_current (b[0]);
876 lbi0 = vnet_buffer (b[0])->ip.adj_index[VLIB_TX];
878 lb0 = load_balance_get (lbi0);
881 if (PREDICT_FALSE (lb0->lb_n_buckets > 1))
883 if (PREDICT_TRUE (vnet_buffer (b[0])->ip.flow_hash))
885 hc0 = vnet_buffer (b[0])->ip.flow_hash =
886 vnet_buffer (b[0])->ip.flow_hash >> 1;
890 hc0 = vnet_buffer (b[0])->ip.flow_hash =
891 ip6_compute_flow_hash (ip0, lb0->lb_hash_config);
893 dpo0 = load_balance_get_fwd_bucket
894 (lb0, (hc0 & (lb0->lb_n_buckets_minus_1)));
898 dpo0 = load_balance_get_bucket_i (lb0, 0);
901 next[0] = dpo0->dpoi_next_node;
902 vnet_buffer (b[0])->ip.adj_index[VLIB_TX] = dpo0->dpoi_index;
904 /* Only process the HBH Option Header if explicitly configured to do so */
905 if (PREDICT_FALSE (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
907 next[0] = (dpo_is_adj (dpo0) && im->hbh_enabled) ?
908 (ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next[0];
911 vlib_increment_combined_counter
912 (cm, thread_index, lbi0, 1, vlib_buffer_length_in_chain (vm, b[0]));
919 vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors);
921 if (node->flags & VLIB_NODE_FLAG_TRACE)
922 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
924 return frame->n_vectors;
928 VLIB_REGISTER_NODE (ip6_load_balance_node) =
930 .name = "ip6-load-balance",
931 .vector_size = sizeof (u32),
932 .sibling_of = "ip6-lookup",
933 .format_trace = format_ip6_lookup_trace,
939 /* Adjacency taken. */
944 /* Packet data, possibly *after* rewrite. */
945 u8 packet_data[128 - 1 * sizeof (u32)];
947 ip6_forward_next_trace_t;
949 #ifndef CLIB_MARCH_VARIANT
951 format_ip6_forward_next_trace (u8 * s, va_list * args)
953 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
954 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
955 ip6_forward_next_trace_t *t = va_arg (*args, ip6_forward_next_trace_t *);
956 u32 indent = format_get_indent (s);
958 s = format (s, "%Ufib:%d adj:%d flow:%d",
959 format_white_space, indent,
960 t->fib_index, t->adj_index, t->flow_hash);
961 s = format (s, "\n%U%U",
962 format_white_space, indent,
963 format_ip6_header, t->packet_data, sizeof (t->packet_data));
969 format_ip6_lookup_trace (u8 * s, va_list * args)
971 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
972 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
973 ip6_forward_next_trace_t *t = va_arg (*args, ip6_forward_next_trace_t *);
974 u32 indent = format_get_indent (s);
976 s = format (s, "fib %d dpo-idx %d flow hash: 0x%08x",
977 t->fib_index, t->adj_index, t->flow_hash);
978 s = format (s, "\n%U%U",
979 format_white_space, indent,
980 format_ip6_header, t->packet_data, sizeof (t->packet_data));
986 format_ip6_rewrite_trace (u8 * s, va_list * args)
988 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
989 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
990 ip6_forward_next_trace_t *t = va_arg (*args, ip6_forward_next_trace_t *);
991 u32 indent = format_get_indent (s);
993 s = format (s, "tx_sw_if_index %d adj-idx %d : %U flow hash: 0x%08x",
994 t->fib_index, t->adj_index, format_ip_adjacency,
995 t->adj_index, FORMAT_IP_ADJACENCY_NONE, t->flow_hash);
996 s = format (s, "\n%U%U",
997 format_white_space, indent,
998 format_ip_adjacency_packet_data,
999 t->packet_data, sizeof (t->packet_data));
1003 /* Common trace function for all ip6-forward next nodes. */
1004 #ifndef CLIB_MARCH_VARIANT
1006 ip6_forward_next_trace (vlib_main_t * vm,
1007 vlib_node_runtime_t * node,
1008 vlib_frame_t * frame, vlib_rx_or_tx_t which_adj_index)
1011 ip6_main_t *im = &ip6_main;
1013 n_left = frame->n_vectors;
1014 from = vlib_frame_vector_args (frame);
1019 vlib_buffer_t *b0, *b1;
1020 ip6_forward_next_trace_t *t0, *t1;
1022 /* Prefetch next iteration. */
1023 vlib_prefetch_buffer_with_index (vm, from[2], LOAD);
1024 vlib_prefetch_buffer_with_index (vm, from[3], LOAD);
1029 b0 = vlib_get_buffer (vm, bi0);
1030 b1 = vlib_get_buffer (vm, bi1);
1032 if (b0->flags & VLIB_BUFFER_IS_TRACED)
1034 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
1035 t0->adj_index = vnet_buffer (b0)->ip.adj_index[which_adj_index];
1036 t0->flow_hash = vnet_buffer (b0)->ip.flow_hash;
1038 (vnet_buffer (b0)->sw_if_index[VLIB_TX] !=
1039 (u32) ~ 0) ? vnet_buffer (b0)->sw_if_index[VLIB_TX] :
1040 vec_elt (im->fib_index_by_sw_if_index,
1041 vnet_buffer (b0)->sw_if_index[VLIB_RX]);
1043 clib_memcpy_fast (t0->packet_data,
1044 vlib_buffer_get_current (b0),
1045 sizeof (t0->packet_data));
1047 if (b1->flags & VLIB_BUFFER_IS_TRACED)
1049 t1 = vlib_add_trace (vm, node, b1, sizeof (t1[0]));
1050 t1->adj_index = vnet_buffer (b1)->ip.adj_index[which_adj_index];
1051 t1->flow_hash = vnet_buffer (b1)->ip.flow_hash;
1053 (vnet_buffer (b1)->sw_if_index[VLIB_TX] !=
1054 (u32) ~ 0) ? vnet_buffer (b1)->sw_if_index[VLIB_TX] :
1055 vec_elt (im->fib_index_by_sw_if_index,
1056 vnet_buffer (b1)->sw_if_index[VLIB_RX]);
1058 clib_memcpy_fast (t1->packet_data,
1059 vlib_buffer_get_current (b1),
1060 sizeof (t1->packet_data));
1070 ip6_forward_next_trace_t *t0;
1074 b0 = vlib_get_buffer (vm, bi0);
1076 if (b0->flags & VLIB_BUFFER_IS_TRACED)
1078 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
1079 t0->adj_index = vnet_buffer (b0)->ip.adj_index[which_adj_index];
1080 t0->flow_hash = vnet_buffer (b0)->ip.flow_hash;
1082 (vnet_buffer (b0)->sw_if_index[VLIB_TX] !=
1083 (u32) ~ 0) ? vnet_buffer (b0)->sw_if_index[VLIB_TX] :
1084 vec_elt (im->fib_index_by_sw_if_index,
1085 vnet_buffer (b0)->sw_if_index[VLIB_RX]);
1087 clib_memcpy_fast (t0->packet_data,
1088 vlib_buffer_get_current (b0),
1089 sizeof (t0->packet_data));
1096 /* Compute TCP/UDP/ICMP6 checksum in software. */
1098 ip6_tcp_udp_icmp_compute_checksum (vlib_main_t * vm, vlib_buffer_t * p0,
1099 ip6_header_t * ip0, int *bogus_lengthp)
1102 u16 payload_length, payload_length_host_byte_order;
1104 u32 headers_size = sizeof (ip0[0]);
1105 u8 *data_this_buffer;
1106 u8 next_hdr = ip0->protocol;
1108 ASSERT (bogus_lengthp);
1111 payload_length_host_byte_order = clib_net_to_host_u16 (ip0->payload_length);
1112 data_this_buffer = (u8 *) (ip0 + 1);
1113 payload_length = ip0->payload_length;
1115 /* some icmp packets may come with a "router alert" hop-by-hop extension header (e.g., mldv2 packets)
1116 * or UDP-Ping packets */
1117 if (PREDICT_FALSE (next_hdr == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
1120 ip6_hop_by_hop_ext_t *ext_hdr =
1121 (ip6_hop_by_hop_ext_t *) data_this_buffer;
1123 /* validate really icmp6 next */
1124 ASSERT ((ext_hdr->next_hdr == IP_PROTOCOL_ICMP6)
1125 || (ext_hdr->next_hdr == IP_PROTOCOL_UDP));
1127 skip_bytes = 8 * (1 + ext_hdr->n_data_u64s);
1128 data_this_buffer = (void *) ((u8 *) data_this_buffer + skip_bytes);
1130 payload_length_host_byte_order -= skip_bytes;
1131 headers_size += skip_bytes;
1133 /* pseudo-header adjustments:
1134 * exclude ext header bytes from payload length
1135 * use payload IP proto rather than ext header IP proto
1137 payload_length = clib_host_to_net_u16 (payload_length_host_byte_order);
1138 next_hdr = ext_hdr->next_hdr;
1141 /* Initialize checksum with ip pseudo-header. */
1142 sum0 = payload_length + clib_host_to_net_u16 (next_hdr);
1144 for (i = 0; i < ARRAY_LEN (ip0->src_address.as_uword); i++)
1146 sum0 = ip_csum_with_carry
1147 (sum0, clib_mem_unaligned (&ip0->src_address.as_uword[i], uword));
1148 sum0 = ip_csum_with_carry
1149 (sum0, clib_mem_unaligned (&ip0->dst_address.as_uword[i], uword));
1153 return ip_calculate_l4_checksum (vm, p0, sum0,
1154 payload_length_host_byte_order,
1155 (u8 *) ip0, headers_size, NULL);
1157 return ip_calculate_l4_checksum (vm, 0, sum0,
1158 payload_length_host_byte_order, NULL, 0,
1163 ip6_tcp_udp_icmp_validate_checksum (vlib_main_t * vm, vlib_buffer_t * p0)
1165 ip6_header_t *ip0 = vlib_buffer_get_current (p0);
1170 /* some icmp packets may come with a "router alert" hop-by-hop extension header (e.g., mldv2 packets) */
1171 ASSERT (ip0->protocol == IP_PROTOCOL_TCP
1172 || ip0->protocol == IP_PROTOCOL_ICMP6
1173 || ip0->protocol == IP_PROTOCOL_UDP
1174 || ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS);
1176 udp0 = (void *) (ip0 + 1);
1177 if (ip0->protocol == IP_PROTOCOL_UDP && udp0->checksum == 0)
1179 p0->flags |= (VNET_BUFFER_F_L4_CHECKSUM_COMPUTED
1180 | VNET_BUFFER_F_L4_CHECKSUM_CORRECT);
1184 sum16 = ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip0, &bogus_length);
1186 p0->flags |= (VNET_BUFFER_F_L4_CHECKSUM_COMPUTED
1187 | ((sum16 == 0) << VNET_BUFFER_F_LOG2_L4_CHECKSUM_CORRECT));
1194 * @brief returns number of links on which src is reachable.
1197 ip6_urpf_loose_check (ip6_main_t * im, vlib_buffer_t * b, ip6_header_t * i)
1199 const load_balance_t *lb0;
1203 fib_index = vec_elt (im->fib_index_by_sw_if_index,
1204 vnet_buffer (b)->sw_if_index[VLIB_RX]);
1206 (vnet_buffer (b)->sw_if_index[VLIB_TX] == (u32) ~ 0) ?
1207 fib_index : vnet_buffer (b)->sw_if_index[VLIB_TX];
1209 lbi = ip6_fib_table_fwding_lookup (fib_index, &i->src_address);
1210 lb0 = load_balance_get (lbi);
1212 return (fib_urpf_check_size (lb0->lb_urpf));
1216 ip6_next_proto_is_tcp_udp (vlib_buffer_t * p0, ip6_header_t * ip0,
1220 proto0 = ip6_locate_header (p0, ip0, IP_PROTOCOL_UDP, udp_offset0);
1221 if (proto0 != IP_PROTOCOL_UDP)
1223 proto0 = ip6_locate_header (p0, ip0, IP_PROTOCOL_TCP, udp_offset0);
1224 proto0 = (proto0 == IP_PROTOCOL_TCP) ? proto0 : 0;
1230 VNET_FEATURE_ARC_INIT (ip6_local) =
1232 .arc_name = "ip6-local",
1233 .start_nodes = VNET_FEATURES ("ip6-local"),
1237 static_always_inline u8
1238 ip6_tcp_udp_icmp_bad_length (vlib_main_t * vm, vlib_buffer_t * p0)
1241 u16 payload_length_host_byte_order;
1242 u32 n_this_buffer, n_bytes_left;
1243 ip6_header_t *ip0 = vlib_buffer_get_current (p0);
1244 u32 headers_size = sizeof (ip0[0]);
1245 u8 *data_this_buffer;
1248 data_this_buffer = (u8 *) (ip0 + 1);
1250 ip6_hop_by_hop_ext_t *ext_hdr = (ip6_hop_by_hop_ext_t *) data_this_buffer;
1252 /* validate really icmp6 next */
1254 if (!(ext_hdr->next_hdr == IP_PROTOCOL_ICMP6)
1255 || (ext_hdr->next_hdr == IP_PROTOCOL_UDP))
1259 payload_length_host_byte_order = clib_net_to_host_u16 (ip0->payload_length);
1260 n_bytes_left = n_this_buffer = payload_length_host_byte_order;
1263 u32 n_ip_bytes_this_buffer =
1264 p0->current_length - (((u8 *) ip0 - p0->data) - p0->current_data);
1265 if (n_this_buffer + headers_size > n_ip_bytes_this_buffer)
1267 n_this_buffer = p0->current_length > headers_size ?
1268 n_ip_bytes_this_buffer - headers_size : 0;
1271 n_bytes_left -= n_this_buffer;
1272 n_bytes_left -= p0->total_length_not_including_first_buffer;
1274 if (n_bytes_left == 0)
1282 ip6_local_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
1283 vlib_frame_t * frame, int head_of_feature_arc)
1285 ip6_main_t *im = &ip6_main;
1286 ip_lookup_main_t *lm = &im->lookup_main;
1287 u32 *from, n_left_from;
1288 vlib_node_runtime_t *error_node =
1289 vlib_node_get_runtime (vm, ip6_input_node.index);
1290 u8 arc_index = vnet_feat_arc_ip6_local.feature_arc_index;
1291 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
1292 u16 nexts[VLIB_FRAME_SIZE], *next;
1294 from = vlib_frame_vector_args (frame);
1295 n_left_from = frame->n_vectors;
1297 if (node->flags & VLIB_NODE_FLAG_TRACE)
1298 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
1300 vlib_get_buffers (vm, from, bufs, n_left_from);
1304 while (n_left_from > 2)
1306 /* Prefetch next iteration. */
1307 if (n_left_from >= 6)
1309 vlib_prefetch_buffer_header (b[4], STORE);
1310 vlib_prefetch_buffer_header (b[5], STORE);
1311 vlib_prefetch_buffer_data (b[2], LOAD);
1312 vlib_prefetch_buffer_data (b[3], LOAD);
1315 ip6_error_t error[2];
1316 error[0] = IP6_ERROR_UNKNOWN_PROTOCOL;
1317 error[1] = IP6_ERROR_UNKNOWN_PROTOCOL;
1319 ip6_header_t *ip[2];
1320 ip[0] = vlib_buffer_get_current (b[0]);
1321 ip[1] = vlib_buffer_get_current (b[1]);
1323 if (head_of_feature_arc)
1325 vnet_buffer (b[0])->l3_hdr_offset = b[0]->current_data;
1326 vnet_buffer (b[1])->l3_hdr_offset = b[1]->current_data;
1329 type[0] = lm->builtin_protocol_by_ip_protocol[ip[0]->protocol];
1330 type[1] = lm->builtin_protocol_by_ip_protocol[ip[1]->protocol];
1333 flags[0] = b[0]->flags;
1334 flags[1] = b[1]->flags;
1336 u32 good_l4_csum[2];
1338 flags[0] & (VNET_BUFFER_F_L4_CHECKSUM_CORRECT |
1339 VNET_BUFFER_F_OFFLOAD_TCP_CKSUM |
1340 VNET_BUFFER_F_OFFLOAD_UDP_CKSUM);
1342 flags[1] & (VNET_BUFFER_F_L4_CHECKSUM_CORRECT |
1343 VNET_BUFFER_F_OFFLOAD_TCP_CKSUM |
1344 VNET_BUFFER_F_OFFLOAD_UDP_CKSUM);
1346 u32 udp_offset[2] = { };
1349 ip6_next_proto_is_tcp_udp (b[0], ip[0], &udp_offset[0]);
1351 ip6_next_proto_is_tcp_udp (b[1], ip[1], &udp_offset[1]);
1352 i16 len_diff[2] = { 0 };
1353 if (PREDICT_TRUE (is_tcp_udp[0]))
1356 (udp_header_t *) ((u8 *) ip[0] + udp_offset[0]);
1357 good_l4_csum[0] |= type[0] == IP_BUILTIN_PROTOCOL_UDP
1358 && udp->checksum == 0;
1359 /* optimistically verify UDP length. */
1360 u16 ip_len, udp_len;
1361 ip_len = clib_net_to_host_u16 (ip[0]->payload_length);
1362 udp_len = clib_net_to_host_u16 (udp->length);
1363 len_diff[0] = ip_len - udp_len;
1365 if (PREDICT_TRUE (is_tcp_udp[1]))
1368 (udp_header_t *) ((u8 *) ip[1] + udp_offset[1]);
1369 good_l4_csum[1] |= type[1] == IP_BUILTIN_PROTOCOL_UDP
1370 && udp->checksum == 0;
1371 /* optimistically verify UDP length. */
1372 u16 ip_len, udp_len;
1373 ip_len = clib_net_to_host_u16 (ip[1]->payload_length);
1374 udp_len = clib_net_to_host_u16 (udp->length);
1375 len_diff[1] = ip_len - udp_len;
1378 good_l4_csum[0] |= type[0] == IP_BUILTIN_PROTOCOL_UNKNOWN;
1379 good_l4_csum[1] |= type[1] == IP_BUILTIN_PROTOCOL_UNKNOWN;
1381 len_diff[0] = type[0] == IP_BUILTIN_PROTOCOL_UDP ? len_diff[0] : 0;
1382 len_diff[1] = type[1] == IP_BUILTIN_PROTOCOL_UDP ? len_diff[1] : 0;
1385 need_csum[0] = type[0] != IP_BUILTIN_PROTOCOL_UNKNOWN
1387 && !(flags[0] & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED);
1388 need_csum[1] = type[1] != IP_BUILTIN_PROTOCOL_UNKNOWN
1390 && !(flags[1] & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED);
1391 if (PREDICT_FALSE (need_csum[0]))
1393 flags[0] = ip6_tcp_udp_icmp_validate_checksum (vm, b[0]);
1394 good_l4_csum[0] = flags[0] & VNET_BUFFER_F_L4_CHECKSUM_CORRECT;
1395 error[0] = IP6_ERROR_UNKNOWN_PROTOCOL;
1399 if (ip6_tcp_udp_icmp_bad_length (vm, b[0]))
1400 error[0] = IP6_ERROR_BAD_LENGTH;
1402 if (PREDICT_FALSE (need_csum[1]))
1404 flags[1] = ip6_tcp_udp_icmp_validate_checksum (vm, b[1]);
1405 good_l4_csum[1] = flags[1] & VNET_BUFFER_F_L4_CHECKSUM_CORRECT;
1406 error[1] = IP6_ERROR_UNKNOWN_PROTOCOL;
1410 if (ip6_tcp_udp_icmp_bad_length (vm, b[1]))
1411 error[1] = IP6_ERROR_BAD_LENGTH;
1415 error[0] = len_diff[0] < 0 ? IP6_ERROR_UDP_LENGTH : error[0];
1417 error[1] = len_diff[1] < 0 ? IP6_ERROR_UDP_LENGTH : error[1];
1419 STATIC_ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_UDP ==
1420 IP6_ERROR_UDP_CHECKSUM,
1421 "Wrong IP6 errors constants");
1422 STATIC_ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_ICMP ==
1423 IP6_ERROR_ICMP_CHECKSUM,
1424 "Wrong IP6 errors constants");
1427 !good_l4_csum[0] ? IP6_ERROR_UDP_CHECKSUM + type[0] : error[0];
1429 !good_l4_csum[1] ? IP6_ERROR_UDP_CHECKSUM + type[1] : error[1];
1431 /* Drop packets from unroutable hosts. */
1432 /* If this is a neighbor solicitation (ICMP), skip source RPF check */
1434 unroutable[0] = error[0] == IP6_ERROR_UNKNOWN_PROTOCOL
1435 && type[0] != IP_BUILTIN_PROTOCOL_ICMP
1436 && !ip6_address_is_link_local_unicast (&ip[0]->src_address);
1437 unroutable[1] = error[1] == IP6_ERROR_UNKNOWN_PROTOCOL
1438 && type[1] != IP_BUILTIN_PROTOCOL_ICMP
1439 && !ip6_address_is_link_local_unicast (&ip[1]->src_address);
1440 if (PREDICT_FALSE (unroutable[0]))
1443 !ip6_urpf_loose_check (im, b[0],
1444 ip[0]) ? IP6_ERROR_SRC_LOOKUP_MISS
1447 if (PREDICT_FALSE (unroutable[1]))
1450 !ip6_urpf_loose_check (im, b[1],
1451 ip[1]) ? IP6_ERROR_SRC_LOOKUP_MISS
1455 vnet_buffer (b[0])->ip.fib_index =
1456 vnet_buffer (b[0])->sw_if_index[VLIB_TX] != ~0 ?
1457 vnet_buffer (b[0])->sw_if_index[VLIB_TX] :
1458 vnet_buffer (b[0])->ip.fib_index;
1459 vnet_buffer (b[1])->ip.fib_index =
1460 vnet_buffer (b[1])->sw_if_index[VLIB_TX] != ~0 ?
1461 vnet_buffer (b[1])->sw_if_index[VLIB_TX] :
1462 vnet_buffer (b[1])->ip.fib_index;
1463 } /* head_of_feature_arc */
1465 next[0] = lm->local_next_by_ip_protocol[ip[0]->protocol];
1467 error[0] != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next[0];
1468 next[1] = lm->local_next_by_ip_protocol[ip[1]->protocol];
1470 error[1] != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next[1];
1472 b[0]->error = error_node->errors[error[0]];
1473 b[1]->error = error_node->errors[error[1]];
1475 if (head_of_feature_arc)
1478 ip6_unknown[0] = error[0] == (u8) IP6_ERROR_UNKNOWN_PROTOCOL;
1479 ip6_unknown[1] = error[1] == (u8) IP6_ERROR_UNKNOWN_PROTOCOL;
1480 if (PREDICT_TRUE (ip6_unknown[0]))
1482 u32 next32 = next[0];
1483 vnet_feature_arc_start (arc_index,
1484 vnet_buffer (b[0])->sw_if_index
1485 [VLIB_RX], &next32, b[0]);
1488 if (PREDICT_TRUE (ip6_unknown[1]))
1490 u32 next32 = next[1];
1491 vnet_feature_arc_start (arc_index,
1492 vnet_buffer (b[1])->sw_if_index
1493 [VLIB_RX], &next32, b[1]);
1507 error = IP6_ERROR_UNKNOWN_PROTOCOL;
1510 ip = vlib_buffer_get_current (b[0]);
1512 if (head_of_feature_arc)
1514 vnet_buffer (b[0])->l3_hdr_offset = b[0]->current_data;
1515 u8 type = lm->builtin_protocol_by_ip_protocol[ip->protocol];
1517 u32 flags = b[0]->flags;
1519 flags & (VNET_BUFFER_F_L4_CHECKSUM_CORRECT |
1520 VNET_BUFFER_F_OFFLOAD_TCP_CKSUM |
1521 VNET_BUFFER_F_OFFLOAD_UDP_CKSUM);
1525 u8 is_tcp_udp = ip6_next_proto_is_tcp_udp (b[0], ip, &udp_offset);
1526 if (PREDICT_TRUE (is_tcp_udp))
1528 udp_header_t *udp = (udp_header_t *) ((u8 *) ip + udp_offset);
1529 /* Don't verify UDP checksum for packets with explicit zero checksum. */
1530 good_l4_csum |= type == IP_BUILTIN_PROTOCOL_UDP
1531 && udp->checksum == 0;
1532 /* optimistically verify UDP length. */
1533 u16 ip_len, udp_len;
1534 ip_len = clib_net_to_host_u16 (ip->payload_length);
1535 udp_len = clib_net_to_host_u16 (udp->length);
1536 len_diff = ip_len - udp_len;
1539 good_l4_csum |= type == IP_BUILTIN_PROTOCOL_UNKNOWN;
1540 len_diff = type == IP_BUILTIN_PROTOCOL_UDP ? len_diff : 0;
1542 u8 need_csum = type != IP_BUILTIN_PROTOCOL_UNKNOWN && !good_l4_csum
1543 && !(flags & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED);
1544 if (PREDICT_FALSE (need_csum))
1546 flags = ip6_tcp_udp_icmp_validate_checksum (vm, b[0]);
1547 good_l4_csum = flags & VNET_BUFFER_F_L4_CHECKSUM_CORRECT;
1548 error = IP6_ERROR_UNKNOWN_PROTOCOL;
1552 if (ip6_tcp_udp_icmp_bad_length (vm, b[0]))
1553 error = IP6_ERROR_BAD_LENGTH;
1558 error = len_diff < 0 ? IP6_ERROR_UDP_LENGTH : error;
1560 STATIC_ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_UDP ==
1561 IP6_ERROR_UDP_CHECKSUM,
1562 "Wrong IP6 errors constants");
1563 STATIC_ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_ICMP ==
1564 IP6_ERROR_ICMP_CHECKSUM,
1565 "Wrong IP6 errors constants");
1567 error = !good_l4_csum ? IP6_ERROR_UDP_CHECKSUM + type : error;
1569 /* Drop packets from unroutable hosts. */
1570 /* If this is a neighbor solicitation (ICMP), skip source RPF check */
1571 u8 unroutable = error == IP6_ERROR_UNKNOWN_PROTOCOL
1572 && type != IP_BUILTIN_PROTOCOL_ICMP
1573 && !ip6_address_is_link_local_unicast (&ip->src_address);
1574 if (PREDICT_FALSE (unroutable))
1577 !ip6_urpf_loose_check (im, b[0],
1578 ip) ? IP6_ERROR_SRC_LOOKUP_MISS :
1582 vnet_buffer (b[0])->ip.fib_index =
1583 vnet_buffer (b[0])->sw_if_index[VLIB_TX] != ~0 ?
1584 vnet_buffer (b[0])->sw_if_index[VLIB_TX] :
1585 vnet_buffer (b[0])->ip.fib_index;
1586 } /* head_of_feature_arc */
1588 next[0] = lm->local_next_by_ip_protocol[ip->protocol];
1590 error != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next[0];
1592 b[0]->error = error_node->errors[error];
1594 if (head_of_feature_arc)
1596 if (PREDICT_TRUE (error == (u8) IP6_ERROR_UNKNOWN_PROTOCOL))
1598 u32 next32 = next[0];
1599 vnet_feature_arc_start (arc_index,
1600 vnet_buffer (b[0])->sw_if_index
1601 [VLIB_RX], &next32, b[0]);
1612 vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors);
1613 return frame->n_vectors;
1616 VLIB_NODE_FN (ip6_local_node) (vlib_main_t * vm, vlib_node_runtime_t * node,
1617 vlib_frame_t * frame)
1619 return ip6_local_inline (vm, node, frame, 1 /* head of feature arc */ );
1623 VLIB_REGISTER_NODE (ip6_local_node) =
1625 .name = "ip6-local",
1626 .vector_size = sizeof (u32),
1627 .format_trace = format_ip6_forward_next_trace,
1628 .n_next_nodes = IP_LOCAL_N_NEXT,
1631 [IP_LOCAL_NEXT_DROP] = "ip6-drop",
1632 [IP_LOCAL_NEXT_PUNT] = "ip6-punt",
1633 [IP_LOCAL_NEXT_UDP_LOOKUP] = "ip6-udp-lookup",
1634 [IP_LOCAL_NEXT_ICMP] = "ip6-icmp-input",
1635 [IP_LOCAL_NEXT_REASSEMBLY] = "ip6-full-reassembly",
1640 VLIB_NODE_FN (ip6_local_end_of_arc_node) (vlib_main_t * vm,
1641 vlib_node_runtime_t * node,
1642 vlib_frame_t * frame)
1644 return ip6_local_inline (vm, node, frame, 0 /* head of feature arc */ );
1648 VLIB_REGISTER_NODE (ip6_local_end_of_arc_node) = {
1649 .name = "ip6-local-end-of-arc",
1650 .vector_size = sizeof (u32),
1652 .format_trace = format_ip6_forward_next_trace,
1653 .sibling_of = "ip6-local",
1656 VNET_FEATURE_INIT (ip6_local_end_of_arc, static) = {
1657 .arc_name = "ip6-local",
1658 .node_name = "ip6-local-end-of-arc",
1659 .runs_before = 0, /* not before any other features */
1663 #ifdef CLIB_MARCH_VARIANT
1664 extern vlib_node_registration_t ip6_local_node;
1667 ip6_register_protocol (u32 protocol, u32 node_index)
1669 vlib_main_t *vm = vlib_get_main ();
1670 ip6_main_t *im = &ip6_main;
1671 ip_lookup_main_t *lm = &im->lookup_main;
1673 ASSERT (protocol < ARRAY_LEN (lm->local_next_by_ip_protocol));
1674 lm->local_next_by_ip_protocol[protocol] =
1675 vlib_node_add_next (vm, ip6_local_node.index, node_index);
1679 ip6_unregister_protocol (u32 protocol)
1681 ip6_main_t *im = &ip6_main;
1682 ip_lookup_main_t *lm = &im->lookup_main;
1684 ASSERT (protocol < ARRAY_LEN (lm->local_next_by_ip_protocol));
1685 lm->local_next_by_ip_protocol[protocol] = IP_LOCAL_NEXT_PUNT;
1691 IP6_REWRITE_NEXT_DROP,
1692 IP6_REWRITE_NEXT_ICMP_ERROR,
1693 IP6_REWRITE_NEXT_FRAGMENT,
1694 IP6_REWRITE_N_NEXT /* Last */
1695 } ip6_rewrite_next_t;
1698 * This bits of an IPv6 address to mask to construct a multicast
1701 #define IP6_MCAST_ADDR_MASK 0xffffffff
1704 ip6_mtu_check (vlib_buffer_t * b, u16 packet_bytes,
1705 u16 adj_packet_bytes, bool is_locally_generated,
1706 u32 * next, u8 is_midchain, u32 * error)
1708 if (adj_packet_bytes >= 1280 && packet_bytes > adj_packet_bytes)
1710 if (is_locally_generated)
1712 /* IP fragmentation */
1713 ip_frag_set_vnet_buffer (b, adj_packet_bytes,
1715 IP_FRAG_NEXT_IP_REWRITE_MIDCHAIN :
1716 IP_FRAG_NEXT_IP_REWRITE), 0);
1717 *next = IP6_REWRITE_NEXT_FRAGMENT;
1718 *error = IP6_ERROR_MTU_EXCEEDED;
1722 *error = IP6_ERROR_MTU_EXCEEDED;
1723 icmp6_error_set_vnet_buffer (b, ICMP6_packet_too_big, 0,
1725 *next = IP6_REWRITE_NEXT_ICMP_ERROR;
1731 ip6_rewrite_inline_with_gso (vlib_main_t * vm,
1732 vlib_node_runtime_t * node,
1733 vlib_frame_t * frame,
1734 int do_counters, int is_midchain, int is_mcast)
1736 ip_lookup_main_t *lm = &ip6_main.lookup_main;
1737 u32 *from = vlib_frame_vector_args (frame);
1738 u32 n_left_from, n_left_to_next, *to_next, next_index;
1739 vlib_node_runtime_t *error_node =
1740 vlib_node_get_runtime (vm, ip6_input_node.index);
1742 n_left_from = frame->n_vectors;
1743 next_index = node->cached_next_index;
1744 u32 thread_index = vm->thread_index;
1746 while (n_left_from > 0)
1748 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1750 while (n_left_from >= 4 && n_left_to_next >= 2)
1752 const ip_adjacency_t *adj0, *adj1;
1753 vlib_buffer_t *p0, *p1;
1754 ip6_header_t *ip0, *ip1;
1755 u32 pi0, rw_len0, next0, error0, adj_index0;
1756 u32 pi1, rw_len1, next1, error1, adj_index1;
1757 u32 tx_sw_if_index0, tx_sw_if_index1;
1758 bool is_locally_originated0, is_locally_originated1;
1760 /* Prefetch next iteration. */
1762 vlib_buffer_t *p2, *p3;
1764 p2 = vlib_get_buffer (vm, from[2]);
1765 p3 = vlib_get_buffer (vm, from[3]);
1767 vlib_prefetch_buffer_header (p2, LOAD);
1768 vlib_prefetch_buffer_header (p3, LOAD);
1770 CLIB_PREFETCH (p2->pre_data, 32, STORE);
1771 CLIB_PREFETCH (p3->pre_data, 32, STORE);
1773 CLIB_PREFETCH (p2->data, sizeof (ip0[0]), STORE);
1774 CLIB_PREFETCH (p3->data, sizeof (ip0[0]), STORE);
1777 pi0 = to_next[0] = from[0];
1778 pi1 = to_next[1] = from[1];
1783 n_left_to_next -= 2;
1785 p0 = vlib_get_buffer (vm, pi0);
1786 p1 = vlib_get_buffer (vm, pi1);
1788 adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
1789 adj_index1 = vnet_buffer (p1)->ip.adj_index[VLIB_TX];
1791 ip0 = vlib_buffer_get_current (p0);
1792 ip1 = vlib_buffer_get_current (p1);
1794 error0 = error1 = IP6_ERROR_NONE;
1795 next0 = next1 = IP6_REWRITE_NEXT_DROP;
1797 is_locally_originated0 =
1798 p0->flags & VNET_BUFFER_F_LOCALLY_ORIGINATED;
1799 if (PREDICT_TRUE (!is_locally_originated0))
1801 i32 hop_limit0 = ip0->hop_limit;
1803 /* Input node should have reject packets with hop limit 0. */
1804 ASSERT (ip0->hop_limit > 0);
1808 ip0->hop_limit = hop_limit0;
1811 * If the hop count drops below 1 when forwarding, generate
1814 if (PREDICT_FALSE (hop_limit0 <= 0))
1816 error0 = IP6_ERROR_TIME_EXPIRED;
1817 next0 = IP6_REWRITE_NEXT_ICMP_ERROR;
1818 vnet_buffer (p0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
1819 icmp6_error_set_vnet_buffer (p0, ICMP6_time_exceeded,
1820 ICMP6_time_exceeded_ttl_exceeded_in_transit,
1825 is_locally_originated1 =
1826 p1->flags & VNET_BUFFER_F_LOCALLY_ORIGINATED;
1827 if (PREDICT_TRUE (!is_locally_originated1))
1829 i32 hop_limit1 = ip1->hop_limit;
1831 /* Input node should have reject packets with hop limit 0. */
1832 ASSERT (ip1->hop_limit > 0);
1836 ip1->hop_limit = hop_limit1;
1839 * If the hop count drops below 1 when forwarding, generate
1842 if (PREDICT_FALSE (hop_limit1 <= 0))
1844 error1 = IP6_ERROR_TIME_EXPIRED;
1845 next1 = IP6_REWRITE_NEXT_ICMP_ERROR;
1846 vnet_buffer (p1)->sw_if_index[VLIB_TX] = (u32) ~ 0;
1847 icmp6_error_set_vnet_buffer (p1, ICMP6_time_exceeded,
1848 ICMP6_time_exceeded_ttl_exceeded_in_transit,
1853 adj0 = adj_get (adj_index0);
1854 adj1 = adj_get (adj_index1);
1856 rw_len0 = adj0[0].rewrite_header.data_bytes;
1857 rw_len1 = adj1[0].rewrite_header.data_bytes;
1858 vnet_buffer (p0)->ip.save_rewrite_length = rw_len0;
1859 vnet_buffer (p1)->ip.save_rewrite_length = rw_len1;
1863 vlib_increment_combined_counter
1864 (&adjacency_counters,
1865 thread_index, adj_index0, 1,
1866 vlib_buffer_length_in_chain (vm, p0) + rw_len0);
1867 vlib_increment_combined_counter
1868 (&adjacency_counters,
1869 thread_index, adj_index1, 1,
1870 vlib_buffer_length_in_chain (vm, p1) + rw_len1);
1873 /* Check MTU of outgoing interface. */
1875 clib_net_to_host_u16 (ip0->payload_length) +
1876 sizeof (ip6_header_t);
1878 clib_net_to_host_u16 (ip1->payload_length) +
1879 sizeof (ip6_header_t);
1880 if (p0->flags & VNET_BUFFER_F_GSO)
1881 ip0_len = gso_mtu_sz (p0);
1882 if (p1->flags & VNET_BUFFER_F_GSO)
1883 ip1_len = gso_mtu_sz (p1);
1887 ip6_mtu_check (p0, ip0_len,
1888 adj0[0].rewrite_header.max_l3_packet_bytes,
1889 is_locally_originated0, &next0, is_midchain,
1891 ip6_mtu_check (p1, ip1_len,
1892 adj1[0].rewrite_header.max_l3_packet_bytes,
1893 is_locally_originated1, &next1, is_midchain,
1896 /* Don't adjust the buffer for hop count issue; icmp-error node
1897 * wants to see the IP header */
1898 if (PREDICT_TRUE (error0 == IP6_ERROR_NONE))
1900 p0->current_data -= rw_len0;
1901 p0->current_length += rw_len0;
1903 tx_sw_if_index0 = adj0[0].rewrite_header.sw_if_index;
1904 vnet_buffer (p0)->sw_if_index[VLIB_TX] = tx_sw_if_index0;
1905 next0 = adj0[0].rewrite_header.next_index;
1908 (adj0[0].rewrite_header.flags & VNET_REWRITE_HAS_FEATURES))
1909 vnet_feature_arc_start_w_cfg_index
1910 (lm->output_feature_arc_index, tx_sw_if_index0, &next0, p0,
1911 adj0->ia_cfg_index);
1915 p0->error = error_node->errors[error0];
1917 if (PREDICT_TRUE (error1 == IP6_ERROR_NONE))
1919 p1->current_data -= rw_len1;
1920 p1->current_length += rw_len1;
1922 tx_sw_if_index1 = adj1[0].rewrite_header.sw_if_index;
1923 vnet_buffer (p1)->sw_if_index[VLIB_TX] = tx_sw_if_index1;
1924 next1 = adj1[0].rewrite_header.next_index;
1927 (adj1[0].rewrite_header.flags & VNET_REWRITE_HAS_FEATURES))
1928 vnet_feature_arc_start_w_cfg_index
1929 (lm->output_feature_arc_index, tx_sw_if_index1, &next1, p1,
1930 adj1->ia_cfg_index);
1934 p1->error = error_node->errors[error1];
1939 /* before we paint on the next header, update the L4
1940 * checksums if required, since there's no offload on a tunnel */
1941 vnet_calc_checksums_inline (vm, p0, 0 /* is_ip4 */ ,
1943 vnet_calc_checksums_inline (vm, p1, 0 /* is_ip4 */ ,
1946 /* Guess we are only writing on ipv6 header. */
1947 vnet_rewrite_two_headers (adj0[0], adj1[0],
1948 ip0, ip1, sizeof (ip6_header_t));
1951 /* Guess we are only writing on simple Ethernet header. */
1952 vnet_rewrite_two_headers (adj0[0], adj1[0],
1953 ip0, ip1, sizeof (ethernet_header_t));
1957 if (adj0->sub_type.midchain.fixup_func)
1958 adj0->sub_type.midchain.fixup_func
1959 (vm, adj0, p0, adj0->sub_type.midchain.fixup_data);
1960 if (adj1->sub_type.midchain.fixup_func)
1961 adj1->sub_type.midchain.fixup_func
1962 (vm, adj1, p1, adj1->sub_type.midchain.fixup_data);
1967 * copy bytes from the IP address into the MAC rewrite
1969 vnet_ip_mcast_fixup_header (IP6_MCAST_ADDR_MASK,
1971 rewrite_header.dst_mcast_offset,
1972 &ip0->dst_address.as_u32[3],
1974 vnet_ip_mcast_fixup_header (IP6_MCAST_ADDR_MASK,
1976 rewrite_header.dst_mcast_offset,
1977 &ip1->dst_address.as_u32[3],
1981 vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
1982 to_next, n_left_to_next,
1983 pi0, pi1, next0, next1);
1986 while (n_left_from > 0 && n_left_to_next > 0)
1988 ip_adjacency_t *adj0;
1992 u32 adj_index0, next0, error0;
1993 u32 tx_sw_if_index0;
1994 bool is_locally_originated0;
1996 pi0 = to_next[0] = from[0];
1998 p0 = vlib_get_buffer (vm, pi0);
2000 adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
2002 adj0 = adj_get (adj_index0);
2004 ip0 = vlib_buffer_get_current (p0);
2006 error0 = IP6_ERROR_NONE;
2007 next0 = IP6_REWRITE_NEXT_DROP;
2009 /* Check hop limit */
2010 is_locally_originated0 =
2011 p0->flags & VNET_BUFFER_F_LOCALLY_ORIGINATED;
2012 if (PREDICT_TRUE (!is_locally_originated0))
2014 i32 hop_limit0 = ip0->hop_limit;
2016 ASSERT (ip0->hop_limit > 0);
2020 ip0->hop_limit = hop_limit0;
2022 if (PREDICT_FALSE (hop_limit0 <= 0))
2025 * If the hop count drops below 1 when forwarding, generate
2028 error0 = IP6_ERROR_TIME_EXPIRED;
2029 next0 = IP6_REWRITE_NEXT_ICMP_ERROR;
2030 vnet_buffer (p0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
2031 icmp6_error_set_vnet_buffer (p0, ICMP6_time_exceeded,
2032 ICMP6_time_exceeded_ttl_exceeded_in_transit,
2039 vnet_calc_checksums_inline (vm, p0, 0 /* is_ip4 */ ,
2042 /* Guess we are only writing on ip6 header. */
2043 vnet_rewrite_one_header (adj0[0], ip0, sizeof (ip6_header_t));
2046 /* Guess we are only writing on simple Ethernet header. */
2047 vnet_rewrite_one_header (adj0[0], ip0,
2048 sizeof (ethernet_header_t));
2050 /* Update packet buffer attributes/set output interface. */
2051 rw_len0 = adj0[0].rewrite_header.data_bytes;
2052 vnet_buffer (p0)->ip.save_rewrite_length = rw_len0;
2056 vlib_increment_combined_counter
2057 (&adjacency_counters,
2058 thread_index, adj_index0, 1,
2059 vlib_buffer_length_in_chain (vm, p0) + rw_len0);
2062 /* Check MTU of outgoing interface. */
2064 clib_net_to_host_u16 (ip0->payload_length) +
2065 sizeof (ip6_header_t);
2066 if (p0->flags & VNET_BUFFER_F_GSO)
2067 ip0_len = gso_mtu_sz (p0);
2069 ip6_mtu_check (p0, ip0_len,
2070 adj0[0].rewrite_header.max_l3_packet_bytes,
2071 is_locally_originated0, &next0, is_midchain,
2074 /* Don't adjust the buffer for hop count issue; icmp-error node
2075 * wants to see the IP header */
2076 if (PREDICT_TRUE (error0 == IP6_ERROR_NONE))
2078 p0->current_data -= rw_len0;
2079 p0->current_length += rw_len0;
2081 tx_sw_if_index0 = adj0[0].rewrite_header.sw_if_index;
2083 vnet_buffer (p0)->sw_if_index[VLIB_TX] = tx_sw_if_index0;
2084 next0 = adj0[0].rewrite_header.next_index;
2087 (adj0[0].rewrite_header.flags & VNET_REWRITE_HAS_FEATURES))
2088 vnet_feature_arc_start_w_cfg_index
2089 (lm->output_feature_arc_index, tx_sw_if_index0, &next0, p0,
2090 adj0->ia_cfg_index);
2094 p0->error = error_node->errors[error0];
2099 if (adj0->sub_type.midchain.fixup_func)
2100 adj0->sub_type.midchain.fixup_func
2101 (vm, adj0, p0, adj0->sub_type.midchain.fixup_data);
2105 vnet_ip_mcast_fixup_header (IP6_MCAST_ADDR_MASK,
2107 rewrite_header.dst_mcast_offset,
2108 &ip0->dst_address.as_u32[3],
2115 n_left_to_next -= 1;
2117 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
2118 to_next, n_left_to_next,
2122 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2125 /* Need to do trace after rewrites to pick up new packet data. */
2126 if (node->flags & VLIB_NODE_FLAG_TRACE)
2127 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
2129 return frame->n_vectors;
2133 ip6_rewrite_inline (vlib_main_t * vm,
2134 vlib_node_runtime_t * node,
2135 vlib_frame_t * frame,
2136 int do_counters, int is_midchain, int is_mcast)
2138 return ip6_rewrite_inline_with_gso (vm, node, frame, do_counters,
2139 is_midchain, is_mcast);
2142 VLIB_NODE_FN (ip6_rewrite_node) (vlib_main_t * vm,
2143 vlib_node_runtime_t * node,
2144 vlib_frame_t * frame)
2146 if (adj_are_counters_enabled ())
2147 return ip6_rewrite_inline (vm, node, frame, 1, 0, 0);
2149 return ip6_rewrite_inline (vm, node, frame, 0, 0, 0);
2152 VLIB_NODE_FN (ip6_rewrite_bcast_node) (vlib_main_t * vm,
2153 vlib_node_runtime_t * node,
2154 vlib_frame_t * frame)
2156 if (adj_are_counters_enabled ())
2157 return ip6_rewrite_inline (vm, node, frame, 1, 0, 0);
2159 return ip6_rewrite_inline (vm, node, frame, 0, 0, 0);
2162 VLIB_NODE_FN (ip6_rewrite_mcast_node) (vlib_main_t * vm,
2163 vlib_node_runtime_t * node,
2164 vlib_frame_t * frame)
2166 if (adj_are_counters_enabled ())
2167 return ip6_rewrite_inline (vm, node, frame, 1, 0, 1);
2169 return ip6_rewrite_inline (vm, node, frame, 0, 0, 1);
2172 VLIB_NODE_FN (ip6_midchain_node) (vlib_main_t * vm,
2173 vlib_node_runtime_t * node,
2174 vlib_frame_t * frame)
2176 if (adj_are_counters_enabled ())
2177 return ip6_rewrite_inline (vm, node, frame, 1, 1, 0);
2179 return ip6_rewrite_inline (vm, node, frame, 0, 1, 0);
2182 VLIB_NODE_FN (ip6_mcast_midchain_node) (vlib_main_t * vm,
2183 vlib_node_runtime_t * node,
2184 vlib_frame_t * frame)
2186 if (adj_are_counters_enabled ())
2187 return ip6_rewrite_inline (vm, node, frame, 1, 1, 1);
2189 return ip6_rewrite_inline (vm, node, frame, 0, 1, 1);
2193 VLIB_REGISTER_NODE (ip6_midchain_node) =
2195 .name = "ip6-midchain",
2196 .vector_size = sizeof (u32),
2197 .format_trace = format_ip6_forward_next_trace,
2198 .sibling_of = "ip6-rewrite",
2201 VLIB_REGISTER_NODE (ip6_rewrite_node) =
2203 .name = "ip6-rewrite",
2204 .vector_size = sizeof (u32),
2205 .format_trace = format_ip6_rewrite_trace,
2206 .n_next_nodes = IP6_REWRITE_N_NEXT,
2209 [IP6_REWRITE_NEXT_DROP] = "ip6-drop",
2210 [IP6_REWRITE_NEXT_ICMP_ERROR] = "ip6-icmp-error",
2211 [IP6_REWRITE_NEXT_FRAGMENT] = "ip6-frag",
2215 VLIB_REGISTER_NODE (ip6_rewrite_bcast_node) = {
2216 .name = "ip6-rewrite-bcast",
2217 .vector_size = sizeof (u32),
2219 .format_trace = format_ip6_rewrite_trace,
2220 .sibling_of = "ip6-rewrite",
2223 VLIB_REGISTER_NODE (ip6_rewrite_mcast_node) =
2225 .name = "ip6-rewrite-mcast",
2226 .vector_size = sizeof (u32),
2227 .format_trace = format_ip6_rewrite_trace,
2228 .sibling_of = "ip6-rewrite",
2232 VLIB_REGISTER_NODE (ip6_mcast_midchain_node) =
2234 .name = "ip6-mcast-midchain",
2235 .vector_size = sizeof (u32),
2236 .format_trace = format_ip6_rewrite_trace,
2237 .sibling_of = "ip6-rewrite",
2243 * Hop-by-Hop handling
2245 #ifndef CLIB_MARCH_VARIANT
2246 ip6_hop_by_hop_main_t ip6_hop_by_hop_main;
2247 #endif /* CLIB_MARCH_VARIANT */
2249 #define foreach_ip6_hop_by_hop_error \
2250 _(PROCESSED, "pkts with ip6 hop-by-hop options") \
2251 _(FORMAT, "incorrectly formatted hop-by-hop options") \
2252 _(UNKNOWN_OPTION, "unknown ip6 hop-by-hop options")
2257 #define _(sym,str) IP6_HOP_BY_HOP_ERROR_##sym,
2258 foreach_ip6_hop_by_hop_error
2260 IP6_HOP_BY_HOP_N_ERROR,
2261 } ip6_hop_by_hop_error_t;
2265 * Primary h-b-h handler trace support
2266 * We work pretty hard on the problem for obvious reasons
2272 u8 option_data[256];
2273 } ip6_hop_by_hop_trace_t;
2275 extern vlib_node_registration_t ip6_hop_by_hop_node;
2277 static char *ip6_hop_by_hop_error_strings[] = {
2278 #define _(sym,string) string,
2279 foreach_ip6_hop_by_hop_error
2283 #ifndef CLIB_MARCH_VARIANT
2285 format_ip6_hop_by_hop_ext_hdr (u8 * s, va_list * args)
2287 ip6_hop_by_hop_header_t *hbh0 = va_arg (*args, ip6_hop_by_hop_header_t *);
2288 int total_len = va_arg (*args, int);
2289 ip6_hop_by_hop_option_t *opt0, *limit0;
2290 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2293 s = format (s, "IP6_HOP_BY_HOP: next protocol %d len %d total %d",
2294 hbh0->protocol, (hbh0->length + 1) << 3, total_len);
2296 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2297 limit0 = (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 + total_len);
2299 while (opt0 < limit0)
2304 case 0: /* Pad, just stop */
2305 opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0 + 1);
2309 if (hm->trace[type0])
2311 s = (*hm->trace[type0]) (s, opt0);
2316 format (s, "\n unrecognized option %d length %d", type0,
2320 (ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length +
2321 sizeof (ip6_hop_by_hop_option_t));
2330 format_ip6_hop_by_hop_trace (u8 * s, va_list * args)
2332 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
2333 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
2334 ip6_hop_by_hop_trace_t *t = va_arg (*args, ip6_hop_by_hop_trace_t *);
2335 ip6_hop_by_hop_header_t *hbh0;
2336 ip6_hop_by_hop_option_t *opt0, *limit0;
2337 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2341 hbh0 = (ip6_hop_by_hop_header_t *) t->option_data;
2343 s = format (s, "IP6_HOP_BY_HOP: next index %d len %d traced %d",
2344 t->next_index, (hbh0->length + 1) << 3, t->trace_len);
2346 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2347 limit0 = (ip6_hop_by_hop_option_t *) ((u8 *) hbh0) + t->trace_len;
2349 while (opt0 < limit0)
2354 case 0: /* Pad, just stop */
2355 opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0) + 1;
2359 if (hm->trace[type0])
2361 s = (*hm->trace[type0]) (s, opt0);
2366 format (s, "\n unrecognized option %d length %d", type0,
2370 (ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length +
2371 sizeof (ip6_hop_by_hop_option_t));
2379 ip6_scan_hbh_options (vlib_buffer_t * b0,
2381 ip6_hop_by_hop_header_t * hbh0,
2382 ip6_hop_by_hop_option_t * opt0,
2383 ip6_hop_by_hop_option_t * limit0, u32 * next0)
2385 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2389 while (opt0 < limit0)
2395 opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0) + 1;
2400 if (hm->options[type0])
2402 if ((*hm->options[type0]) (b0, ip0, opt0) < 0)
2404 error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2410 /* Unrecognized mandatory option, check the two high order bits */
2411 switch (opt0->type & HBH_OPTION_TYPE_HIGH_ORDER_BITS)
2413 case HBH_OPTION_TYPE_SKIP_UNKNOWN:
2415 case HBH_OPTION_TYPE_DISCARD_UNKNOWN:
2416 error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2417 *next0 = IP_LOOKUP_NEXT_DROP;
2419 case HBH_OPTION_TYPE_DISCARD_UNKNOWN_ICMP:
2420 error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2421 *next0 = IP_LOOKUP_NEXT_ICMP_ERROR;
2422 icmp6_error_set_vnet_buffer (b0, ICMP6_parameter_problem,
2423 ICMP6_parameter_problem_unrecognized_option,
2424 (u8 *) opt0 - (u8 *) ip0);
2426 case HBH_OPTION_TYPE_DISCARD_UNKNOWN_ICMP_NOT_MCAST:
2427 error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2428 if (!ip6_address_is_multicast (&ip0->dst_address))
2430 *next0 = IP_LOOKUP_NEXT_ICMP_ERROR;
2431 icmp6_error_set_vnet_buffer (b0,
2432 ICMP6_parameter_problem,
2433 ICMP6_parameter_problem_unrecognized_option,
2434 (u8 *) opt0 - (u8 *) ip0);
2438 *next0 = IP_LOOKUP_NEXT_DROP;
2446 (ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length +
2447 sizeof (ip6_hop_by_hop_option_t));
2453 * Process the Hop-by-Hop Options header
2455 VLIB_NODE_FN (ip6_hop_by_hop_node) (vlib_main_t * vm,
2456 vlib_node_runtime_t * node,
2457 vlib_frame_t * frame)
2459 vlib_node_runtime_t *error_node =
2460 vlib_node_get_runtime (vm, ip6_hop_by_hop_node.index);
2461 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2462 u32 n_left_from, *from, *to_next;
2463 ip_lookup_next_t next_index;
2465 from = vlib_frame_vector_args (frame);
2466 n_left_from = frame->n_vectors;
2467 next_index = node->cached_next_index;
2469 while (n_left_from > 0)
2473 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
2475 while (n_left_from >= 4 && n_left_to_next >= 2)
2478 vlib_buffer_t *b0, *b1;
2480 ip6_header_t *ip0, *ip1;
2481 ip6_hop_by_hop_header_t *hbh0, *hbh1;
2482 ip6_hop_by_hop_option_t *opt0, *limit0, *opt1, *limit1;
2483 u8 error0 = 0, error1 = 0;
2485 /* Prefetch next iteration. */
2487 vlib_buffer_t *p2, *p3;
2489 p2 = vlib_get_buffer (vm, from[2]);
2490 p3 = vlib_get_buffer (vm, from[3]);
2492 vlib_prefetch_buffer_header (p2, LOAD);
2493 vlib_prefetch_buffer_header (p3, LOAD);
2495 CLIB_PREFETCH (p2->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
2496 CLIB_PREFETCH (p3->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
2499 /* Speculatively enqueue b0, b1 to the current next frame */
2500 to_next[0] = bi0 = from[0];
2501 to_next[1] = bi1 = from[1];
2505 n_left_to_next -= 2;
2507 b0 = vlib_get_buffer (vm, bi0);
2508 b1 = vlib_get_buffer (vm, bi1);
2510 /* Default use the next_index from the adjacency. A HBH option rarely redirects to a different node */
2511 u32 adj_index0 = vnet_buffer (b0)->ip.adj_index[VLIB_TX];
2512 ip_adjacency_t *adj0 = adj_get (adj_index0);
2513 u32 adj_index1 = vnet_buffer (b1)->ip.adj_index[VLIB_TX];
2514 ip_adjacency_t *adj1 = adj_get (adj_index1);
2516 /* Default use the next_index from the adjacency. A HBH option rarely redirects to a different node */
2517 next0 = adj0->lookup_next_index;
2518 next1 = adj1->lookup_next_index;
2520 ip0 = vlib_buffer_get_current (b0);
2521 ip1 = vlib_buffer_get_current (b1);
2522 hbh0 = (ip6_hop_by_hop_header_t *) (ip0 + 1);
2523 hbh1 = (ip6_hop_by_hop_header_t *) (ip1 + 1);
2524 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2525 opt1 = (ip6_hop_by_hop_option_t *) (hbh1 + 1);
2527 (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 +
2528 ((hbh0->length + 1) << 3));
2530 (ip6_hop_by_hop_option_t *) ((u8 *) hbh1 +
2531 ((hbh1->length + 1) << 3));
2534 * Basic validity checks
2536 if ((hbh0->length + 1) << 3 >
2537 clib_net_to_host_u16 (ip0->payload_length))
2539 error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2540 next0 = IP_LOOKUP_NEXT_DROP;
2543 /* Scan the set of h-b-h options, process ones that we understand */
2544 error0 = ip6_scan_hbh_options (b0, ip0, hbh0, opt0, limit0, &next0);
2546 if ((hbh1->length + 1) << 3 >
2547 clib_net_to_host_u16 (ip1->payload_length))
2549 error1 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2550 next1 = IP_LOOKUP_NEXT_DROP;
2553 /* Scan the set of h-b-h options, process ones that we understand */
2554 error1 = ip6_scan_hbh_options (b1, ip1, hbh1, opt1, limit1, &next1);
2557 /* Has the classifier flagged this buffer for special treatment? */
2560 && (vnet_buffer (b0)->l2_classify.opaque_index & OI_DECAP)))
2561 next0 = hm->next_override;
2563 /* Has the classifier flagged this buffer for special treatment? */
2566 && (vnet_buffer (b1)->l2_classify.opaque_index & OI_DECAP)))
2567 next1 = hm->next_override;
2569 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)))
2571 if (b0->flags & VLIB_BUFFER_IS_TRACED)
2573 ip6_hop_by_hop_trace_t *t =
2574 vlib_add_trace (vm, node, b0, sizeof (*t));
2575 u32 trace_len = (hbh0->length + 1) << 3;
2576 t->next_index = next0;
2577 /* Capture the h-b-h option verbatim */
2580 ARRAY_LEN (t->option_data) ? trace_len :
2581 ARRAY_LEN (t->option_data);
2582 t->trace_len = trace_len;
2583 clib_memcpy_fast (t->option_data, hbh0, trace_len);
2585 if (b1->flags & VLIB_BUFFER_IS_TRACED)
2587 ip6_hop_by_hop_trace_t *t =
2588 vlib_add_trace (vm, node, b1, sizeof (*t));
2589 u32 trace_len = (hbh1->length + 1) << 3;
2590 t->next_index = next1;
2591 /* Capture the h-b-h option verbatim */
2594 ARRAY_LEN (t->option_data) ? trace_len :
2595 ARRAY_LEN (t->option_data);
2596 t->trace_len = trace_len;
2597 clib_memcpy_fast (t->option_data, hbh1, trace_len);
2602 b0->error = error_node->errors[error0];
2603 b1->error = error_node->errors[error1];
2605 /* verify speculative enqueue, maybe switch current next frame */
2606 vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
2607 n_left_to_next, bi0, bi1, next0,
2611 while (n_left_from > 0 && n_left_to_next > 0)
2617 ip6_hop_by_hop_header_t *hbh0;
2618 ip6_hop_by_hop_option_t *opt0, *limit0;
2621 /* Speculatively enqueue b0 to the current next frame */
2627 n_left_to_next -= 1;
2629 b0 = vlib_get_buffer (vm, bi0);
2631 * Default use the next_index from the adjacency.
2632 * A HBH option rarely redirects to a different node
2634 u32 adj_index0 = vnet_buffer (b0)->ip.adj_index[VLIB_TX];
2635 ip_adjacency_t *adj0 = adj_get (adj_index0);
2636 next0 = adj0->lookup_next_index;
2638 ip0 = vlib_buffer_get_current (b0);
2639 hbh0 = (ip6_hop_by_hop_header_t *) (ip0 + 1);
2640 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2642 (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 +
2643 ((hbh0->length + 1) << 3));
2646 * Basic validity checks
2648 if ((hbh0->length + 1) << 3 >
2649 clib_net_to_host_u16 (ip0->payload_length))
2651 error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2652 next0 = IP_LOOKUP_NEXT_DROP;
2656 /* Scan the set of h-b-h options, process ones that we understand */
2657 error0 = ip6_scan_hbh_options (b0, ip0, hbh0, opt0, limit0, &next0);
2660 /* Has the classifier flagged this buffer for special treatment? */
2663 && (vnet_buffer (b0)->l2_classify.opaque_index & OI_DECAP)))
2664 next0 = hm->next_override;
2666 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
2668 ip6_hop_by_hop_trace_t *t =
2669 vlib_add_trace (vm, node, b0, sizeof (*t));
2670 u32 trace_len = (hbh0->length + 1) << 3;
2671 t->next_index = next0;
2672 /* Capture the h-b-h option verbatim */
2675 ARRAY_LEN (t->option_data) ? trace_len :
2676 ARRAY_LEN (t->option_data);
2677 t->trace_len = trace_len;
2678 clib_memcpy_fast (t->option_data, hbh0, trace_len);
2681 b0->error = error_node->errors[error0];
2683 /* verify speculative enqueue, maybe switch current next frame */
2684 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
2685 n_left_to_next, bi0, next0);
2687 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2689 return frame->n_vectors;
2693 VLIB_REGISTER_NODE (ip6_hop_by_hop_node) =
2695 .name = "ip6-hop-by-hop",
2696 .sibling_of = "ip6-lookup",
2697 .vector_size = sizeof (u32),
2698 .format_trace = format_ip6_hop_by_hop_trace,
2699 .type = VLIB_NODE_TYPE_INTERNAL,
2700 .n_errors = ARRAY_LEN (ip6_hop_by_hop_error_strings),
2701 .error_strings = ip6_hop_by_hop_error_strings,
2706 static clib_error_t *
2707 ip6_hop_by_hop_init (vlib_main_t * vm)
2709 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2710 clib_memset (hm->options, 0, sizeof (hm->options));
2711 clib_memset (hm->trace, 0, sizeof (hm->trace));
2712 hm->next_override = IP6_LOOKUP_NEXT_POP_HOP_BY_HOP;
2716 VLIB_INIT_FUNCTION (ip6_hop_by_hop_init);
2718 #ifndef CLIB_MARCH_VARIANT
2720 ip6_hbh_set_next_override (uword next)
2722 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2724 hm->next_override = next;
2728 ip6_hbh_register_option (u8 option,
2729 int options (vlib_buffer_t * b, ip6_header_t * ip,
2730 ip6_hop_by_hop_option_t * opt),
2731 u8 * trace (u8 * s, ip6_hop_by_hop_option_t * opt))
2733 ip6_main_t *im = &ip6_main;
2734 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2736 ASSERT ((u32) option < ARRAY_LEN (hm->options));
2738 /* Already registered */
2739 if (hm->options[option])
2742 hm->options[option] = options;
2743 hm->trace[option] = trace;
2745 /* Set global variable */
2746 im->hbh_enabled = 1;
2752 ip6_hbh_unregister_option (u8 option)
2754 ip6_main_t *im = &ip6_main;
2755 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2757 ASSERT ((u32) option < ARRAY_LEN (hm->options));
2759 /* Not registered */
2760 if (!hm->options[option])
2763 hm->options[option] = NULL;
2764 hm->trace[option] = NULL;
2766 /* Disable global knob if this was the last option configured */
2769 for (i = 0; i < 256; i++)
2771 if (hm->options[option])
2778 im->hbh_enabled = 0;
2783 /* Global IP6 main. */
2784 ip6_main_t ip6_main;
2787 static clib_error_t *
2788 ip6_lookup_init (vlib_main_t * vm)
2790 ip6_main_t *im = &ip6_main;
2791 clib_error_t *error;
2794 if ((error = vlib_call_init_function (vm, vnet_feature_init)))
2797 for (i = 0; i < ARRAY_LEN (im->fib_masks); i++)
2804 for (j = 0; j < i0; j++)
2805 im->fib_masks[i].as_u32[j] = ~0;
2808 im->fib_masks[i].as_u32[i0] =
2809 clib_host_to_net_u32 (pow2_mask (i1) << (32 - i1));
2812 ip_lookup_init (&im->lookup_main, /* is_ip6 */ 1);
2814 /* Create FIB with index 0 and table id of 0. */
2815 fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6, 0,
2816 FIB_SOURCE_DEFAULT_ROUTE);
2817 mfib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6, 0,
2818 MFIB_SOURCE_DEFAULT_ROUTE);
2822 pn = pg_get_node (ip6_lookup_node.index);
2823 pn->unformat_edit = unformat_pg_ip6_header;
2826 /* Unless explicitly configured, don't process HBH options */
2827 im->hbh_enabled = 0;
2832 VLIB_INIT_FUNCTION (ip6_lookup_init);
2834 static clib_error_t *
2835 set_ip6_flow_hash_command_fn (vlib_main_t * vm,
2836 unformat_input_t * input,
2837 vlib_cli_command_t * cmd)
2841 u32 flow_hash_config = 0;
2844 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
2846 if (unformat (input, "table %d", &table_id))
2848 #define _(a, b, v) \
2849 else if (unformat (input, #a)) \
2851 flow_hash_config |= v; \
2854 foreach_flow_hash_bit
2861 return clib_error_return (0, "unknown input `%U'",
2862 format_unformat_error, input);
2864 rv = ip_flow_hash_set (AF_IP6, table_id, flow_hash_config);
2871 return clib_error_return (0, "no such FIB table %d", table_id);
2874 clib_warning ("BUG: illegal flow hash config 0x%x", flow_hash_config);
2882 * Configure the set of IPv6 fields used by the flow hash.
2886 * Example of how to set the flow hash on a given table:
2887 * @cliexcmd{set ip6 flow-hash table 8 dst sport dport proto}
2889 * Example of display the configured flow hash:
2890 * @cliexstart{show ip6 fib}
2891 * ipv6-VRF:0, fib_index 0, flow hash: src dst sport dport proto
2894 * [@0]: dpo-load-balance: [index:5 buckets:1 uRPF:5 to:[0:0]]
2895 * [0] [@0]: dpo-drop ip6
2898 * [@0]: dpo-load-balance: [index:10 buckets:1 uRPF:10 to:[0:0]]
2899 * [0] [@2]: dpo-receive
2902 * [@0]: dpo-load-balance: [index:8 buckets:1 uRPF:8 to:[0:0]]
2903 * [0] [@2]: dpo-receive
2906 * [@0]: dpo-load-balance: [index:7 buckets:1 uRPF:7 to:[0:0]]
2907 * [0] [@2]: dpo-receive
2910 * [@0]: dpo-load-balance: [index:9 buckets:1 uRPF:9 to:[0:0]]
2911 * [0] [@2]: dpo-receive
2912 * ff02::1:ff00:0/104
2914 * [@0]: dpo-load-balance: [index:6 buckets:1 uRPF:6 to:[0:0]]
2915 * [0] [@2]: dpo-receive
2916 * ipv6-VRF:8, fib_index 1, flow hash: dst sport dport proto
2919 * [@0]: dpo-load-balance: [index:21 buckets:1 uRPF:20 to:[0:0]]
2920 * [0] [@0]: dpo-drop ip6
2923 * [@0]: dpo-load-balance: [index:27 buckets:1 uRPF:26 to:[0:0]]
2924 * [0] [@4]: ipv6-glean: af_packet0
2927 * [@0]: dpo-load-balance: [index:28 buckets:1 uRPF:27 to:[0:0]]
2928 * [0] [@2]: dpo-receive: @::a:1:1:0:7 on af_packet0
2931 * [@0]: dpo-load-balance: [index:26 buckets:1 uRPF:25 to:[0:0]]
2932 * [0] [@2]: dpo-receive
2933 * fe80::fe:3eff:fe3e:9222/128
2935 * [@0]: dpo-load-balance: [index:29 buckets:1 uRPF:28 to:[0:0]]
2936 * [0] [@2]: dpo-receive: fe80::fe:3eff:fe3e:9222 on af_packet0
2939 * [@0]: dpo-load-balance: [index:24 buckets:1 uRPF:23 to:[0:0]]
2940 * [0] [@2]: dpo-receive
2943 * [@0]: dpo-load-balance: [index:23 buckets:1 uRPF:22 to:[0:0]]
2944 * [0] [@2]: dpo-receive
2947 * [@0]: dpo-load-balance: [index:25 buckets:1 uRPF:24 to:[0:0]]
2948 * [0] [@2]: dpo-receive
2949 * ff02::1:ff00:0/104
2951 * [@0]: dpo-load-balance: [index:22 buckets:1 uRPF:21 to:[0:0]]
2952 * [0] [@2]: dpo-receive
2957 VLIB_CLI_COMMAND (set_ip6_flow_hash_command, static) = {
2958 .path = "set ip6 flow-hash",
2959 .short_help = "set ip6 flow-hash table <table-id> [src] [dst] [sport] "
2960 "[dport] [proto] [reverse] [flowlabel]",
2961 .function = set_ip6_flow_hash_command_fn,
2965 static clib_error_t *
2966 show_ip6_local_command_fn (vlib_main_t * vm,
2967 unformat_input_t * input, vlib_cli_command_t * cmd)
2969 ip6_main_t *im = &ip6_main;
2970 ip_lookup_main_t *lm = &im->lookup_main;
2973 vlib_cli_output (vm, "Protocols handled by ip6_local");
2974 for (i = 0; i < ARRAY_LEN (lm->local_next_by_ip_protocol); i++)
2976 if (lm->local_next_by_ip_protocol[i] != IP_LOCAL_NEXT_PUNT)
2979 u32 node_index = vlib_get_node (vm,
2980 ip6_local_node.index)->
2981 next_nodes[lm->local_next_by_ip_protocol[i]];
2982 vlib_cli_output (vm, "%d: %U", i, format_vlib_node_name, vm,
2992 * Display the set of protocols handled by the local IPv6 stack.
2995 * Example of how to display local protocol table:
2996 * @cliexstart{show ip6 local}
2997 * Protocols handled by ip6_local
3005 VLIB_CLI_COMMAND (show_ip6_local, static) =
3007 .path = "show ip6 local",
3008 .function = show_ip6_local_command_fn,
3009 .short_help = "show ip6 local",
3013 #ifndef CLIB_MARCH_VARIANT
3015 vnet_set_ip6_classify_intfc (vlib_main_t * vm, u32 sw_if_index,
3018 vnet_main_t *vnm = vnet_get_main ();
3019 vnet_interface_main_t *im = &vnm->interface_main;
3020 ip6_main_t *ipm = &ip6_main;
3021 ip_lookup_main_t *lm = &ipm->lookup_main;
3022 vnet_classify_main_t *cm = &vnet_classify_main;
3023 ip6_address_t *if_addr;
3025 if (pool_is_free_index (im->sw_interfaces, sw_if_index))
3026 return VNET_API_ERROR_NO_MATCHING_INTERFACE;
3028 if (table_index != ~0 && pool_is_free_index (cm->tables, table_index))
3029 return VNET_API_ERROR_NO_SUCH_ENTRY;
3031 vec_validate (lm->classify_table_index_by_sw_if_index, sw_if_index);
3032 lm->classify_table_index_by_sw_if_index[sw_if_index] = table_index;
3034 if_addr = ip6_interface_first_address (ipm, sw_if_index);
3036 if (NULL != if_addr)
3038 fib_prefix_t pfx = {
3040 .fp_proto = FIB_PROTOCOL_IP6,
3041 .fp_addr.ip6 = *if_addr,
3045 fib_index = fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4,
3049 if (table_index != (u32) ~ 0)
3051 dpo_id_t dpo = DPO_INVALID;
3056 classify_dpo_create (DPO_PROTO_IP6, table_index));
3058 fib_table_entry_special_dpo_add (fib_index,
3060 FIB_SOURCE_CLASSIFY,
3061 FIB_ENTRY_FLAG_NONE, &dpo);
3066 fib_table_entry_special_remove (fib_index,
3067 &pfx, FIB_SOURCE_CLASSIFY);
3075 static clib_error_t *
3076 set_ip6_classify_command_fn (vlib_main_t * vm,
3077 unformat_input_t * input,
3078 vlib_cli_command_t * cmd)
3080 u32 table_index = ~0;
3081 int table_index_set = 0;
3082 u32 sw_if_index = ~0;
3085 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
3087 if (unformat (input, "table-index %d", &table_index))
3088 table_index_set = 1;
3089 else if (unformat (input, "intfc %U", unformat_vnet_sw_interface,
3090 vnet_get_main (), &sw_if_index))
3096 if (table_index_set == 0)
3097 return clib_error_return (0, "classify table-index must be specified");
3099 if (sw_if_index == ~0)
3100 return clib_error_return (0, "interface / subif must be specified");
3102 rv = vnet_set_ip6_classify_intfc (vm, sw_if_index, table_index);
3109 case VNET_API_ERROR_NO_MATCHING_INTERFACE:
3110 return clib_error_return (0, "No such interface");
3112 case VNET_API_ERROR_NO_SUCH_ENTRY:
3113 return clib_error_return (0, "No such classifier table");
3119 * Assign a classification table to an interface. The classification
3120 * table is created using the '<em>classify table</em>' and '<em>classify session</em>'
3121 * commands. Once the table is create, use this command to filter packets
3125 * Example of how to assign a classification table to an interface:
3126 * @cliexcmd{set ip6 classify intfc GigabitEthernet2/0/0 table-index 1}
3129 VLIB_CLI_COMMAND (set_ip6_classify_command, static) =
3131 .path = "set ip6 classify",
3133 "set ip6 classify intfc <interface> table-index <classify-idx>",
3134 .function = set_ip6_classify_command_fn,
3139 * fd.io coding-style-patch-verification: ON
3142 * eval: (c-set-style "gnu")