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;
1337 oflags[0] = vnet_buffer2 (b[0])->oflags;
1338 oflags[1] = vnet_buffer2 (b[1])->oflags;
1341 l4_offload[0] = (flags[0] & VNET_BUFFER_F_OFFLOAD) &&
1342 (oflags[0] & (VNET_BUFFER_OFFLOAD_F_TCP_CKSUM |
1343 VNET_BUFFER_OFFLOAD_F_UDP_CKSUM));
1344 l4_offload[1] = (flags[1] & VNET_BUFFER_F_OFFLOAD) &&
1345 (oflags[1] & (VNET_BUFFER_OFFLOAD_F_TCP_CKSUM |
1346 VNET_BUFFER_OFFLOAD_F_UDP_CKSUM));
1348 u32 good_l4_csum[2];
1350 (flags[0] & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) | l4_offload[0];
1352 (flags[1] & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) | l4_offload[1];
1354 u32 udp_offset[2] = { };
1357 ip6_next_proto_is_tcp_udp (b[0], ip[0], &udp_offset[0]);
1359 ip6_next_proto_is_tcp_udp (b[1], ip[1], &udp_offset[1]);
1360 i16 len_diff[2] = { 0 };
1361 if (PREDICT_TRUE (is_tcp_udp[0]))
1364 (udp_header_t *) ((u8 *) ip[0] + udp_offset[0]);
1365 good_l4_csum[0] |= type[0] == IP_BUILTIN_PROTOCOL_UDP
1366 && udp->checksum == 0;
1367 /* optimistically verify UDP length. */
1368 u16 ip_len, udp_len;
1369 ip_len = clib_net_to_host_u16 (ip[0]->payload_length);
1370 udp_len = clib_net_to_host_u16 (udp->length);
1371 len_diff[0] = ip_len - udp_len;
1373 if (PREDICT_TRUE (is_tcp_udp[1]))
1376 (udp_header_t *) ((u8 *) ip[1] + udp_offset[1]);
1377 good_l4_csum[1] |= type[1] == IP_BUILTIN_PROTOCOL_UDP
1378 && udp->checksum == 0;
1379 /* optimistically verify UDP length. */
1380 u16 ip_len, udp_len;
1381 ip_len = clib_net_to_host_u16 (ip[1]->payload_length);
1382 udp_len = clib_net_to_host_u16 (udp->length);
1383 len_diff[1] = ip_len - udp_len;
1386 good_l4_csum[0] |= type[0] == IP_BUILTIN_PROTOCOL_UNKNOWN;
1387 good_l4_csum[1] |= type[1] == IP_BUILTIN_PROTOCOL_UNKNOWN;
1389 len_diff[0] = type[0] == IP_BUILTIN_PROTOCOL_UDP ? len_diff[0] : 0;
1390 len_diff[1] = type[1] == IP_BUILTIN_PROTOCOL_UDP ? len_diff[1] : 0;
1393 need_csum[0] = type[0] != IP_BUILTIN_PROTOCOL_UNKNOWN
1395 && !(flags[0] & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED);
1396 need_csum[1] = type[1] != IP_BUILTIN_PROTOCOL_UNKNOWN
1398 && !(flags[1] & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED);
1399 if (PREDICT_FALSE (need_csum[0]))
1401 flags[0] = ip6_tcp_udp_icmp_validate_checksum (vm, b[0]);
1402 good_l4_csum[0] = flags[0] & VNET_BUFFER_F_L4_CHECKSUM_CORRECT;
1403 error[0] = IP6_ERROR_UNKNOWN_PROTOCOL;
1407 if (ip6_tcp_udp_icmp_bad_length (vm, b[0]))
1408 error[0] = IP6_ERROR_BAD_LENGTH;
1410 if (PREDICT_FALSE (need_csum[1]))
1412 flags[1] = ip6_tcp_udp_icmp_validate_checksum (vm, b[1]);
1413 good_l4_csum[1] = flags[1] & VNET_BUFFER_F_L4_CHECKSUM_CORRECT;
1414 error[1] = IP6_ERROR_UNKNOWN_PROTOCOL;
1418 if (ip6_tcp_udp_icmp_bad_length (vm, b[1]))
1419 error[1] = IP6_ERROR_BAD_LENGTH;
1423 error[0] = len_diff[0] < 0 ? IP6_ERROR_UDP_LENGTH : error[0];
1425 error[1] = len_diff[1] < 0 ? IP6_ERROR_UDP_LENGTH : error[1];
1427 STATIC_ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_UDP ==
1428 IP6_ERROR_UDP_CHECKSUM,
1429 "Wrong IP6 errors constants");
1430 STATIC_ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_ICMP ==
1431 IP6_ERROR_ICMP_CHECKSUM,
1432 "Wrong IP6 errors constants");
1435 !good_l4_csum[0] ? IP6_ERROR_UDP_CHECKSUM + type[0] : error[0];
1437 !good_l4_csum[1] ? IP6_ERROR_UDP_CHECKSUM + type[1] : error[1];
1439 /* Drop packets from unroutable hosts. */
1440 /* If this is a neighbor solicitation (ICMP), skip source RPF check */
1442 unroutable[0] = error[0] == IP6_ERROR_UNKNOWN_PROTOCOL
1443 && type[0] != IP_BUILTIN_PROTOCOL_ICMP
1444 && !ip6_address_is_link_local_unicast (&ip[0]->src_address);
1445 unroutable[1] = error[1] == IP6_ERROR_UNKNOWN_PROTOCOL
1446 && type[1] != IP_BUILTIN_PROTOCOL_ICMP
1447 && !ip6_address_is_link_local_unicast (&ip[1]->src_address);
1448 if (PREDICT_FALSE (unroutable[0]))
1451 !ip6_urpf_loose_check (im, b[0],
1452 ip[0]) ? IP6_ERROR_SRC_LOOKUP_MISS
1455 if (PREDICT_FALSE (unroutable[1]))
1458 !ip6_urpf_loose_check (im, b[1],
1459 ip[1]) ? IP6_ERROR_SRC_LOOKUP_MISS
1463 vnet_buffer (b[0])->ip.fib_index =
1464 vnet_buffer (b[0])->sw_if_index[VLIB_TX] != ~0 ?
1465 vnet_buffer (b[0])->sw_if_index[VLIB_TX] :
1466 vnet_buffer (b[0])->ip.fib_index;
1467 vnet_buffer (b[1])->ip.fib_index =
1468 vnet_buffer (b[1])->sw_if_index[VLIB_TX] != ~0 ?
1469 vnet_buffer (b[1])->sw_if_index[VLIB_TX] :
1470 vnet_buffer (b[1])->ip.fib_index;
1471 } /* head_of_feature_arc */
1473 next[0] = lm->local_next_by_ip_protocol[ip[0]->protocol];
1475 error[0] != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next[0];
1476 next[1] = lm->local_next_by_ip_protocol[ip[1]->protocol];
1478 error[1] != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next[1];
1480 b[0]->error = error_node->errors[error[0]];
1481 b[1]->error = error_node->errors[error[1]];
1483 if (head_of_feature_arc)
1486 ip6_unknown[0] = error[0] == (u8) IP6_ERROR_UNKNOWN_PROTOCOL;
1487 ip6_unknown[1] = error[1] == (u8) IP6_ERROR_UNKNOWN_PROTOCOL;
1488 if (PREDICT_TRUE (ip6_unknown[0]))
1490 u32 next32 = next[0];
1491 vnet_feature_arc_start (arc_index,
1492 vnet_buffer (b[0])->sw_if_index
1493 [VLIB_RX], &next32, b[0]);
1496 if (PREDICT_TRUE (ip6_unknown[1]))
1498 u32 next32 = next[1];
1499 vnet_feature_arc_start (arc_index,
1500 vnet_buffer (b[1])->sw_if_index
1501 [VLIB_RX], &next32, b[1]);
1515 error = IP6_ERROR_UNKNOWN_PROTOCOL;
1518 ip = vlib_buffer_get_current (b[0]);
1520 if (head_of_feature_arc)
1522 vnet_buffer (b[0])->l3_hdr_offset = b[0]->current_data;
1523 u8 type = lm->builtin_protocol_by_ip_protocol[ip->protocol];
1525 u32 flags = b[0]->flags;
1527 u32 oflags = vnet_buffer2 (b[0])->oflags;
1529 u32 l4_offload = (flags & VNET_BUFFER_F_OFFLOAD) &&
1530 (oflags & (VNET_BUFFER_OFFLOAD_F_TCP_CKSUM |
1531 VNET_BUFFER_OFFLOAD_F_UDP_CKSUM));
1534 (flags & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) | l4_offload;
1537 u8 is_tcp_udp = ip6_next_proto_is_tcp_udp (b[0], ip, &udp_offset);
1538 if (PREDICT_TRUE (is_tcp_udp))
1540 udp_header_t *udp = (udp_header_t *) ((u8 *) ip + udp_offset);
1541 /* Don't verify UDP checksum for packets with explicit zero checksum. */
1542 good_l4_csum |= type == IP_BUILTIN_PROTOCOL_UDP
1543 && udp->checksum == 0;
1544 /* optimistically verify UDP length. */
1545 u16 ip_len, udp_len;
1546 ip_len = clib_net_to_host_u16 (ip->payload_length);
1547 udp_len = clib_net_to_host_u16 (udp->length);
1548 len_diff = ip_len - udp_len;
1551 good_l4_csum |= type == IP_BUILTIN_PROTOCOL_UNKNOWN;
1552 len_diff = type == IP_BUILTIN_PROTOCOL_UDP ? len_diff : 0;
1554 u8 need_csum = type != IP_BUILTIN_PROTOCOL_UNKNOWN &&
1556 !(flags & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED);
1557 if (PREDICT_FALSE (need_csum))
1559 flags = ip6_tcp_udp_icmp_validate_checksum (vm, b[0]);
1560 good_l4_csum = flags & VNET_BUFFER_F_L4_CHECKSUM_CORRECT;
1561 error = IP6_ERROR_UNKNOWN_PROTOCOL;
1565 if (ip6_tcp_udp_icmp_bad_length (vm, b[0]))
1566 error = IP6_ERROR_BAD_LENGTH;
1571 error = len_diff < 0 ? IP6_ERROR_UDP_LENGTH : error;
1572 STATIC_ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_UDP ==
1573 IP6_ERROR_UDP_CHECKSUM,
1574 "Wrong IP6 errors constants");
1575 STATIC_ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_ICMP ==
1576 IP6_ERROR_ICMP_CHECKSUM,
1577 "Wrong IP6 errors constants");
1579 error = !good_l4_csum ? IP6_ERROR_UDP_CHECKSUM + type : error;
1581 /* Drop packets from unroutable hosts. */
1582 /* If this is a neighbor solicitation (ICMP), skip source RPF check */
1583 u8 unroutable = error == IP6_ERROR_UNKNOWN_PROTOCOL
1584 && type != IP_BUILTIN_PROTOCOL_ICMP
1585 && !ip6_address_is_link_local_unicast (&ip->src_address);
1586 if (PREDICT_FALSE (unroutable))
1589 !ip6_urpf_loose_check (im, b[0],
1590 ip) ? IP6_ERROR_SRC_LOOKUP_MISS :
1594 vnet_buffer (b[0])->ip.fib_index =
1595 vnet_buffer (b[0])->sw_if_index[VLIB_TX] != ~0 ?
1596 vnet_buffer (b[0])->sw_if_index[VLIB_TX] :
1597 vnet_buffer (b[0])->ip.fib_index;
1598 } /* head_of_feature_arc */
1600 next[0] = lm->local_next_by_ip_protocol[ip->protocol];
1602 error != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next[0];
1604 b[0]->error = error_node->errors[error];
1606 if (head_of_feature_arc)
1608 if (PREDICT_TRUE (error == (u8) IP6_ERROR_UNKNOWN_PROTOCOL))
1610 u32 next32 = next[0];
1611 vnet_feature_arc_start (arc_index,
1612 vnet_buffer (b[0])->sw_if_index
1613 [VLIB_RX], &next32, b[0]);
1624 vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors);
1625 return frame->n_vectors;
1628 VLIB_NODE_FN (ip6_local_node) (vlib_main_t * vm, vlib_node_runtime_t * node,
1629 vlib_frame_t * frame)
1631 return ip6_local_inline (vm, node, frame, 1 /* head of feature arc */ );
1635 VLIB_REGISTER_NODE (ip6_local_node) =
1637 .name = "ip6-local",
1638 .vector_size = sizeof (u32),
1639 .format_trace = format_ip6_forward_next_trace,
1640 .n_next_nodes = IP_LOCAL_N_NEXT,
1643 [IP_LOCAL_NEXT_DROP] = "ip6-drop",
1644 [IP_LOCAL_NEXT_PUNT] = "ip6-punt",
1645 [IP_LOCAL_NEXT_UDP_LOOKUP] = "ip6-udp-lookup",
1646 [IP_LOCAL_NEXT_ICMP] = "ip6-icmp-input",
1647 [IP_LOCAL_NEXT_REASSEMBLY] = "ip6-full-reassembly",
1652 VLIB_NODE_FN (ip6_local_end_of_arc_node) (vlib_main_t * vm,
1653 vlib_node_runtime_t * node,
1654 vlib_frame_t * frame)
1656 return ip6_local_inline (vm, node, frame, 0 /* head of feature arc */ );
1660 VLIB_REGISTER_NODE (ip6_local_end_of_arc_node) = {
1661 .name = "ip6-local-end-of-arc",
1662 .vector_size = sizeof (u32),
1664 .format_trace = format_ip6_forward_next_trace,
1665 .sibling_of = "ip6-local",
1668 VNET_FEATURE_INIT (ip6_local_end_of_arc, static) = {
1669 .arc_name = "ip6-local",
1670 .node_name = "ip6-local-end-of-arc",
1671 .runs_before = 0, /* not before any other features */
1675 #ifdef CLIB_MARCH_VARIANT
1676 extern vlib_node_registration_t ip6_local_node;
1679 ip6_register_protocol (u32 protocol, u32 node_index)
1681 vlib_main_t *vm = vlib_get_main ();
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] =
1687 vlib_node_add_next (vm, ip6_local_node.index, node_index);
1691 ip6_unregister_protocol (u32 protocol)
1693 ip6_main_t *im = &ip6_main;
1694 ip_lookup_main_t *lm = &im->lookup_main;
1696 ASSERT (protocol < ARRAY_LEN (lm->local_next_by_ip_protocol));
1697 lm->local_next_by_ip_protocol[protocol] = IP_LOCAL_NEXT_PUNT;
1703 IP6_REWRITE_NEXT_DROP,
1704 IP6_REWRITE_NEXT_ICMP_ERROR,
1705 IP6_REWRITE_NEXT_FRAGMENT,
1706 IP6_REWRITE_N_NEXT /* Last */
1707 } ip6_rewrite_next_t;
1710 * This bits of an IPv6 address to mask to construct a multicast
1713 #define IP6_MCAST_ADDR_MASK 0xffffffff
1716 ip6_mtu_check (vlib_buffer_t * b, u16 packet_bytes,
1717 u16 adj_packet_bytes, bool is_locally_generated,
1718 u32 * next, u8 is_midchain, u32 * error)
1720 if (adj_packet_bytes >= 1280 && packet_bytes > adj_packet_bytes)
1722 if (is_locally_generated)
1724 /* IP fragmentation */
1725 ip_frag_set_vnet_buffer (b, adj_packet_bytes,
1727 IP_FRAG_NEXT_IP_REWRITE_MIDCHAIN :
1728 IP_FRAG_NEXT_IP_REWRITE), 0);
1729 *next = IP6_REWRITE_NEXT_FRAGMENT;
1730 *error = IP6_ERROR_MTU_EXCEEDED;
1734 *error = IP6_ERROR_MTU_EXCEEDED;
1735 icmp6_error_set_vnet_buffer (b, ICMP6_packet_too_big, 0,
1737 *next = IP6_REWRITE_NEXT_ICMP_ERROR;
1743 ip6_rewrite_inline_with_gso (vlib_main_t * vm,
1744 vlib_node_runtime_t * node,
1745 vlib_frame_t * frame,
1746 int do_counters, int is_midchain, int is_mcast)
1748 ip_lookup_main_t *lm = &ip6_main.lookup_main;
1749 u32 *from = vlib_frame_vector_args (frame);
1750 u32 n_left_from, n_left_to_next, *to_next, next_index;
1751 vlib_node_runtime_t *error_node =
1752 vlib_node_get_runtime (vm, ip6_input_node.index);
1754 n_left_from = frame->n_vectors;
1755 next_index = node->cached_next_index;
1756 u32 thread_index = vm->thread_index;
1758 while (n_left_from > 0)
1760 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1762 while (n_left_from >= 4 && n_left_to_next >= 2)
1764 const ip_adjacency_t *adj0, *adj1;
1765 vlib_buffer_t *p0, *p1;
1766 ip6_header_t *ip0, *ip1;
1767 u32 pi0, rw_len0, next0, error0, adj_index0;
1768 u32 pi1, rw_len1, next1, error1, adj_index1;
1769 u32 tx_sw_if_index0, tx_sw_if_index1;
1770 bool is_locally_originated0, is_locally_originated1;
1772 /* Prefetch next iteration. */
1774 vlib_buffer_t *p2, *p3;
1776 p2 = vlib_get_buffer (vm, from[2]);
1777 p3 = vlib_get_buffer (vm, from[3]);
1779 vlib_prefetch_buffer_header (p2, LOAD);
1780 vlib_prefetch_buffer_header (p3, LOAD);
1782 CLIB_PREFETCH (p2->pre_data, 32, STORE);
1783 CLIB_PREFETCH (p3->pre_data, 32, STORE);
1785 CLIB_PREFETCH (p2->data, sizeof (ip0[0]), STORE);
1786 CLIB_PREFETCH (p3->data, sizeof (ip0[0]), STORE);
1789 pi0 = to_next[0] = from[0];
1790 pi1 = to_next[1] = from[1];
1795 n_left_to_next -= 2;
1797 p0 = vlib_get_buffer (vm, pi0);
1798 p1 = vlib_get_buffer (vm, pi1);
1800 adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
1801 adj_index1 = vnet_buffer (p1)->ip.adj_index[VLIB_TX];
1803 ip0 = vlib_buffer_get_current (p0);
1804 ip1 = vlib_buffer_get_current (p1);
1806 error0 = error1 = IP6_ERROR_NONE;
1807 next0 = next1 = IP6_REWRITE_NEXT_DROP;
1809 is_locally_originated0 =
1810 p0->flags & VNET_BUFFER_F_LOCALLY_ORIGINATED;
1811 if (PREDICT_TRUE (!is_locally_originated0))
1813 i32 hop_limit0 = ip0->hop_limit;
1815 /* Input node should have reject packets with hop limit 0. */
1816 ASSERT (ip0->hop_limit > 0);
1820 ip0->hop_limit = hop_limit0;
1823 * If the hop count drops below 1 when forwarding, generate
1826 if (PREDICT_FALSE (hop_limit0 <= 0))
1828 error0 = IP6_ERROR_TIME_EXPIRED;
1829 next0 = IP6_REWRITE_NEXT_ICMP_ERROR;
1830 vnet_buffer (p0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
1831 icmp6_error_set_vnet_buffer (p0, ICMP6_time_exceeded,
1832 ICMP6_time_exceeded_ttl_exceeded_in_transit,
1837 is_locally_originated1 =
1838 p1->flags & VNET_BUFFER_F_LOCALLY_ORIGINATED;
1839 if (PREDICT_TRUE (!is_locally_originated1))
1841 i32 hop_limit1 = ip1->hop_limit;
1843 /* Input node should have reject packets with hop limit 0. */
1844 ASSERT (ip1->hop_limit > 0);
1848 ip1->hop_limit = hop_limit1;
1851 * If the hop count drops below 1 when forwarding, generate
1854 if (PREDICT_FALSE (hop_limit1 <= 0))
1856 error1 = IP6_ERROR_TIME_EXPIRED;
1857 next1 = IP6_REWRITE_NEXT_ICMP_ERROR;
1858 vnet_buffer (p1)->sw_if_index[VLIB_TX] = (u32) ~ 0;
1859 icmp6_error_set_vnet_buffer (p1, ICMP6_time_exceeded,
1860 ICMP6_time_exceeded_ttl_exceeded_in_transit,
1865 adj0 = adj_get (adj_index0);
1866 adj1 = adj_get (adj_index1);
1868 rw_len0 = adj0[0].rewrite_header.data_bytes;
1869 rw_len1 = adj1[0].rewrite_header.data_bytes;
1870 vnet_buffer (p0)->ip.save_rewrite_length = rw_len0;
1871 vnet_buffer (p1)->ip.save_rewrite_length = rw_len1;
1875 vlib_increment_combined_counter
1876 (&adjacency_counters,
1877 thread_index, adj_index0, 1,
1878 vlib_buffer_length_in_chain (vm, p0) + rw_len0);
1879 vlib_increment_combined_counter
1880 (&adjacency_counters,
1881 thread_index, adj_index1, 1,
1882 vlib_buffer_length_in_chain (vm, p1) + rw_len1);
1885 /* Check MTU of outgoing interface. */
1887 clib_net_to_host_u16 (ip0->payload_length) +
1888 sizeof (ip6_header_t);
1890 clib_net_to_host_u16 (ip1->payload_length) +
1891 sizeof (ip6_header_t);
1892 if (p0->flags & VNET_BUFFER_F_GSO)
1893 ip0_len = gso_mtu_sz (p0);
1894 if (p1->flags & VNET_BUFFER_F_GSO)
1895 ip1_len = gso_mtu_sz (p1);
1897 ip6_mtu_check (p0, ip0_len,
1898 adj0[0].rewrite_header.max_l3_packet_bytes,
1899 is_locally_originated0, &next0, is_midchain,
1901 ip6_mtu_check (p1, ip1_len,
1902 adj1[0].rewrite_header.max_l3_packet_bytes,
1903 is_locally_originated1, &next1, is_midchain,
1905 /* Don't adjust the buffer for hop count issue; icmp-error node
1906 * wants to see the IP header */
1907 if (PREDICT_TRUE (error0 == IP6_ERROR_NONE))
1909 p0->current_data -= rw_len0;
1910 p0->current_length += rw_len0;
1911 tx_sw_if_index0 = adj0[0].rewrite_header.sw_if_index;
1912 vnet_buffer (p0)->sw_if_index[VLIB_TX] = tx_sw_if_index0;
1913 next0 = adj0[0].rewrite_header.next_index;
1915 (adj0[0].rewrite_header.flags & VNET_REWRITE_HAS_FEATURES))
1916 vnet_feature_arc_start_w_cfg_index
1917 (lm->output_feature_arc_index, tx_sw_if_index0, &next0, p0,
1918 adj0->ia_cfg_index);
1922 p0->error = error_node->errors[error0];
1924 if (PREDICT_TRUE (error1 == IP6_ERROR_NONE))
1926 p1->current_data -= rw_len1;
1927 p1->current_length += rw_len1;
1929 tx_sw_if_index1 = adj1[0].rewrite_header.sw_if_index;
1930 vnet_buffer (p1)->sw_if_index[VLIB_TX] = tx_sw_if_index1;
1931 next1 = adj1[0].rewrite_header.next_index;
1934 (adj1[0].rewrite_header.flags & VNET_REWRITE_HAS_FEATURES))
1935 vnet_feature_arc_start_w_cfg_index
1936 (lm->output_feature_arc_index, tx_sw_if_index1, &next1, p1,
1937 adj1->ia_cfg_index);
1941 p1->error = error_node->errors[error1];
1946 /* before we paint on the next header, update the L4
1947 * checksums if required, since there's no offload on a tunnel */
1948 vnet_calc_checksums_inline (vm, p0, 0 /* is_ip4 */ ,
1950 vnet_calc_checksums_inline (vm, p1, 0 /* is_ip4 */ ,
1953 /* Guess we are only writing on ipv6 header. */
1954 vnet_rewrite_two_headers (adj0[0], adj1[0],
1955 ip0, ip1, sizeof (ip6_header_t));
1958 /* Guess we are only writing on simple Ethernet header. */
1959 vnet_rewrite_two_headers (adj0[0], adj1[0],
1960 ip0, ip1, sizeof (ethernet_header_t));
1964 if (adj0->sub_type.midchain.fixup_func)
1965 adj0->sub_type.midchain.fixup_func
1966 (vm, adj0, p0, adj0->sub_type.midchain.fixup_data);
1967 if (adj1->sub_type.midchain.fixup_func)
1968 adj1->sub_type.midchain.fixup_func
1969 (vm, adj1, p1, adj1->sub_type.midchain.fixup_data);
1974 * copy bytes from the IP address into the MAC rewrite
1976 vnet_ip_mcast_fixup_header (IP6_MCAST_ADDR_MASK,
1978 rewrite_header.dst_mcast_offset,
1979 &ip0->dst_address.as_u32[3],
1981 vnet_ip_mcast_fixup_header (IP6_MCAST_ADDR_MASK,
1983 rewrite_header.dst_mcast_offset,
1984 &ip1->dst_address.as_u32[3],
1988 vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
1989 to_next, n_left_to_next,
1990 pi0, pi1, next0, next1);
1993 while (n_left_from > 0 && n_left_to_next > 0)
1995 ip_adjacency_t *adj0;
1999 u32 adj_index0, next0, error0;
2000 u32 tx_sw_if_index0;
2001 bool is_locally_originated0;
2003 pi0 = to_next[0] = from[0];
2005 p0 = vlib_get_buffer (vm, pi0);
2007 adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
2009 adj0 = adj_get (adj_index0);
2011 ip0 = vlib_buffer_get_current (p0);
2013 error0 = IP6_ERROR_NONE;
2014 next0 = IP6_REWRITE_NEXT_DROP;
2016 /* Check hop limit */
2017 is_locally_originated0 =
2018 p0->flags & VNET_BUFFER_F_LOCALLY_ORIGINATED;
2019 if (PREDICT_TRUE (!is_locally_originated0))
2021 i32 hop_limit0 = ip0->hop_limit;
2023 ASSERT (ip0->hop_limit > 0);
2027 ip0->hop_limit = hop_limit0;
2029 if (PREDICT_FALSE (hop_limit0 <= 0))
2032 * If the hop count drops below 1 when forwarding, generate
2035 error0 = IP6_ERROR_TIME_EXPIRED;
2036 next0 = IP6_REWRITE_NEXT_ICMP_ERROR;
2037 vnet_buffer (p0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
2038 icmp6_error_set_vnet_buffer (p0, ICMP6_time_exceeded,
2039 ICMP6_time_exceeded_ttl_exceeded_in_transit,
2046 vnet_calc_checksums_inline (vm, p0, 0 /* is_ip4 */ ,
2049 /* Guess we are only writing on ip6 header. */
2050 vnet_rewrite_one_header (adj0[0], ip0, sizeof (ip6_header_t));
2053 /* Guess we are only writing on simple Ethernet header. */
2054 vnet_rewrite_one_header (adj0[0], ip0,
2055 sizeof (ethernet_header_t));
2057 /* Update packet buffer attributes/set output interface. */
2058 rw_len0 = adj0[0].rewrite_header.data_bytes;
2059 vnet_buffer (p0)->ip.save_rewrite_length = rw_len0;
2063 vlib_increment_combined_counter
2064 (&adjacency_counters,
2065 thread_index, adj_index0, 1,
2066 vlib_buffer_length_in_chain (vm, p0) + rw_len0);
2069 /* Check MTU of outgoing interface. */
2071 clib_net_to_host_u16 (ip0->payload_length) +
2072 sizeof (ip6_header_t);
2073 if (p0->flags & VNET_BUFFER_F_GSO)
2074 ip0_len = gso_mtu_sz (p0);
2076 ip6_mtu_check (p0, ip0_len,
2077 adj0[0].rewrite_header.max_l3_packet_bytes,
2078 is_locally_originated0, &next0, is_midchain,
2080 /* Don't adjust the buffer for hop count issue; icmp-error node
2081 * wants to see the IP header */
2082 if (PREDICT_TRUE (error0 == IP6_ERROR_NONE))
2084 p0->current_data -= rw_len0;
2085 p0->current_length += rw_len0;
2087 tx_sw_if_index0 = adj0[0].rewrite_header.sw_if_index;
2089 vnet_buffer (p0)->sw_if_index[VLIB_TX] = tx_sw_if_index0;
2090 next0 = adj0[0].rewrite_header.next_index;
2093 (adj0[0].rewrite_header.flags & VNET_REWRITE_HAS_FEATURES))
2094 vnet_feature_arc_start_w_cfg_index
2095 (lm->output_feature_arc_index, tx_sw_if_index0, &next0, p0,
2096 adj0->ia_cfg_index);
2100 p0->error = error_node->errors[error0];
2105 if (adj0->sub_type.midchain.fixup_func)
2106 adj0->sub_type.midchain.fixup_func
2107 (vm, adj0, p0, adj0->sub_type.midchain.fixup_data);
2111 vnet_ip_mcast_fixup_header (IP6_MCAST_ADDR_MASK,
2113 rewrite_header.dst_mcast_offset,
2114 &ip0->dst_address.as_u32[3],
2121 n_left_to_next -= 1;
2123 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
2124 to_next, n_left_to_next,
2128 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2131 /* Need to do trace after rewrites to pick up new packet data. */
2132 if (node->flags & VLIB_NODE_FLAG_TRACE)
2133 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
2135 return frame->n_vectors;
2139 ip6_rewrite_inline (vlib_main_t * vm,
2140 vlib_node_runtime_t * node,
2141 vlib_frame_t * frame,
2142 int do_counters, int is_midchain, int is_mcast)
2144 return ip6_rewrite_inline_with_gso (vm, node, frame, do_counters,
2145 is_midchain, is_mcast);
2148 VLIB_NODE_FN (ip6_rewrite_node) (vlib_main_t * vm,
2149 vlib_node_runtime_t * node,
2150 vlib_frame_t * frame)
2152 if (adj_are_counters_enabled ())
2153 return ip6_rewrite_inline (vm, node, frame, 1, 0, 0);
2155 return ip6_rewrite_inline (vm, node, frame, 0, 0, 0);
2158 VLIB_NODE_FN (ip6_rewrite_bcast_node) (vlib_main_t * vm,
2159 vlib_node_runtime_t * node,
2160 vlib_frame_t * frame)
2162 if (adj_are_counters_enabled ())
2163 return ip6_rewrite_inline (vm, node, frame, 1, 0, 0);
2165 return ip6_rewrite_inline (vm, node, frame, 0, 0, 0);
2168 VLIB_NODE_FN (ip6_rewrite_mcast_node) (vlib_main_t * vm,
2169 vlib_node_runtime_t * node,
2170 vlib_frame_t * frame)
2172 if (adj_are_counters_enabled ())
2173 return ip6_rewrite_inline (vm, node, frame, 1, 0, 1);
2175 return ip6_rewrite_inline (vm, node, frame, 0, 0, 1);
2178 VLIB_NODE_FN (ip6_midchain_node) (vlib_main_t * vm,
2179 vlib_node_runtime_t * node,
2180 vlib_frame_t * frame)
2182 if (adj_are_counters_enabled ())
2183 return ip6_rewrite_inline (vm, node, frame, 1, 1, 0);
2185 return ip6_rewrite_inline (vm, node, frame, 0, 1, 0);
2188 VLIB_NODE_FN (ip6_mcast_midchain_node) (vlib_main_t * vm,
2189 vlib_node_runtime_t * node,
2190 vlib_frame_t * frame)
2192 if (adj_are_counters_enabled ())
2193 return ip6_rewrite_inline (vm, node, frame, 1, 1, 1);
2195 return ip6_rewrite_inline (vm, node, frame, 0, 1, 1);
2199 VLIB_REGISTER_NODE (ip6_midchain_node) =
2201 .name = "ip6-midchain",
2202 .vector_size = sizeof (u32),
2203 .format_trace = format_ip6_forward_next_trace,
2204 .sibling_of = "ip6-rewrite",
2207 VLIB_REGISTER_NODE (ip6_rewrite_node) =
2209 .name = "ip6-rewrite",
2210 .vector_size = sizeof (u32),
2211 .format_trace = format_ip6_rewrite_trace,
2212 .n_next_nodes = IP6_REWRITE_N_NEXT,
2215 [IP6_REWRITE_NEXT_DROP] = "ip6-drop",
2216 [IP6_REWRITE_NEXT_ICMP_ERROR] = "ip6-icmp-error",
2217 [IP6_REWRITE_NEXT_FRAGMENT] = "ip6-frag",
2221 VLIB_REGISTER_NODE (ip6_rewrite_bcast_node) = {
2222 .name = "ip6-rewrite-bcast",
2223 .vector_size = sizeof (u32),
2225 .format_trace = format_ip6_rewrite_trace,
2226 .sibling_of = "ip6-rewrite",
2229 VLIB_REGISTER_NODE (ip6_rewrite_mcast_node) =
2231 .name = "ip6-rewrite-mcast",
2232 .vector_size = sizeof (u32),
2233 .format_trace = format_ip6_rewrite_trace,
2234 .sibling_of = "ip6-rewrite",
2238 VLIB_REGISTER_NODE (ip6_mcast_midchain_node) =
2240 .name = "ip6-mcast-midchain",
2241 .vector_size = sizeof (u32),
2242 .format_trace = format_ip6_rewrite_trace,
2243 .sibling_of = "ip6-rewrite",
2249 * Hop-by-Hop handling
2251 #ifndef CLIB_MARCH_VARIANT
2252 ip6_hop_by_hop_main_t ip6_hop_by_hop_main;
2253 #endif /* CLIB_MARCH_VARIANT */
2255 #define foreach_ip6_hop_by_hop_error \
2256 _(PROCESSED, "pkts with ip6 hop-by-hop options") \
2257 _(FORMAT, "incorrectly formatted hop-by-hop options") \
2258 _(UNKNOWN_OPTION, "unknown ip6 hop-by-hop options")
2263 #define _(sym,str) IP6_HOP_BY_HOP_ERROR_##sym,
2264 foreach_ip6_hop_by_hop_error
2266 IP6_HOP_BY_HOP_N_ERROR,
2267 } ip6_hop_by_hop_error_t;
2271 * Primary h-b-h handler trace support
2272 * We work pretty hard on the problem for obvious reasons
2278 u8 option_data[256];
2279 } ip6_hop_by_hop_trace_t;
2281 extern vlib_node_registration_t ip6_hop_by_hop_node;
2283 static char *ip6_hop_by_hop_error_strings[] = {
2284 #define _(sym,string) string,
2285 foreach_ip6_hop_by_hop_error
2289 #ifndef CLIB_MARCH_VARIANT
2291 format_ip6_hop_by_hop_ext_hdr (u8 * s, va_list * args)
2293 ip6_hop_by_hop_header_t *hbh0 = va_arg (*args, ip6_hop_by_hop_header_t *);
2294 int total_len = va_arg (*args, int);
2295 ip6_hop_by_hop_option_t *opt0, *limit0;
2296 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2298 s = format (s, "IP6_HOP_BY_HOP: next protocol %d len %d total %d",
2299 hbh0->protocol, (hbh0->length + 1) << 3, total_len);
2301 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2302 limit0 = (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 + total_len);
2304 while (opt0 < limit0)
2309 case 0: /* Pad, just stop */
2310 opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0 + 1);
2314 if (hm->trace[type0])
2316 s = (*hm->trace[type0]) (s, opt0);
2320 s = format (s, "\n unrecognized option %d length %d", type0,
2324 (ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length +
2325 sizeof (ip6_hop_by_hop_option_t));
2334 format_ip6_hop_by_hop_trace (u8 * s, va_list * args)
2336 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
2337 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
2338 ip6_hop_by_hop_trace_t *t = va_arg (*args, ip6_hop_by_hop_trace_t *);
2339 ip6_hop_by_hop_header_t *hbh0;
2340 ip6_hop_by_hop_option_t *opt0, *limit0;
2341 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2345 hbh0 = (ip6_hop_by_hop_header_t *) t->option_data;
2347 s = format (s, "IP6_HOP_BY_HOP: next index %d len %d traced %d",
2348 t->next_index, (hbh0->length + 1) << 3, t->trace_len);
2350 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2351 limit0 = (ip6_hop_by_hop_option_t *) ((u8 *) hbh0) + t->trace_len;
2353 while (opt0 < limit0)
2358 case 0: /* Pad, just stop */
2359 opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0) + 1;
2363 if (hm->trace[type0])
2365 s = (*hm->trace[type0]) (s, opt0);
2369 s = format (s, "\n unrecognized option %d length %d", type0,
2373 (ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length +
2374 sizeof (ip6_hop_by_hop_option_t));
2382 ip6_scan_hbh_options (vlib_buffer_t * b0,
2384 ip6_hop_by_hop_header_t * hbh0,
2385 ip6_hop_by_hop_option_t * opt0,
2386 ip6_hop_by_hop_option_t * limit0, u32 * next0)
2388 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2392 while (opt0 < limit0)
2398 opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0) + 1;
2403 if (hm->options[type0])
2405 if ((*hm->options[type0]) (b0, ip0, opt0) < 0)
2407 error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2413 /* Unrecognized mandatory option, check the two high order bits */
2414 switch (opt0->type & HBH_OPTION_TYPE_HIGH_ORDER_BITS)
2416 case HBH_OPTION_TYPE_SKIP_UNKNOWN:
2418 case HBH_OPTION_TYPE_DISCARD_UNKNOWN:
2419 error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2420 *next0 = IP_LOOKUP_NEXT_DROP;
2422 case HBH_OPTION_TYPE_DISCARD_UNKNOWN_ICMP:
2423 error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2424 *next0 = IP_LOOKUP_NEXT_ICMP_ERROR;
2425 icmp6_error_set_vnet_buffer (b0, ICMP6_parameter_problem,
2426 ICMP6_parameter_problem_unrecognized_option,
2427 (u8 *) opt0 - (u8 *) ip0);
2429 case HBH_OPTION_TYPE_DISCARD_UNKNOWN_ICMP_NOT_MCAST:
2430 error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2431 if (!ip6_address_is_multicast (&ip0->dst_address))
2433 *next0 = IP_LOOKUP_NEXT_ICMP_ERROR;
2434 icmp6_error_set_vnet_buffer (b0,
2435 ICMP6_parameter_problem,
2436 ICMP6_parameter_problem_unrecognized_option,
2437 (u8 *) opt0 - (u8 *) ip0);
2441 *next0 = IP_LOOKUP_NEXT_DROP;
2449 (ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length +
2450 sizeof (ip6_hop_by_hop_option_t));
2456 * Process the Hop-by-Hop Options header
2458 VLIB_NODE_FN (ip6_hop_by_hop_node) (vlib_main_t * vm,
2459 vlib_node_runtime_t * node,
2460 vlib_frame_t * frame)
2462 vlib_node_runtime_t *error_node =
2463 vlib_node_get_runtime (vm, ip6_hop_by_hop_node.index);
2464 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2465 u32 n_left_from, *from, *to_next;
2466 ip_lookup_next_t next_index;
2468 from = vlib_frame_vector_args (frame);
2469 n_left_from = frame->n_vectors;
2470 next_index = node->cached_next_index;
2472 while (n_left_from > 0)
2476 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
2478 while (n_left_from >= 4 && n_left_to_next >= 2)
2481 vlib_buffer_t *b0, *b1;
2483 ip6_header_t *ip0, *ip1;
2484 ip6_hop_by_hop_header_t *hbh0, *hbh1;
2485 ip6_hop_by_hop_option_t *opt0, *limit0, *opt1, *limit1;
2486 u8 error0 = 0, error1 = 0;
2488 /* Prefetch next iteration. */
2490 vlib_buffer_t *p2, *p3;
2492 p2 = vlib_get_buffer (vm, from[2]);
2493 p3 = vlib_get_buffer (vm, from[3]);
2495 vlib_prefetch_buffer_header (p2, LOAD);
2496 vlib_prefetch_buffer_header (p3, LOAD);
2498 CLIB_PREFETCH (p2->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
2499 CLIB_PREFETCH (p3->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
2502 /* Speculatively enqueue b0, b1 to the current next frame */
2503 to_next[0] = bi0 = from[0];
2504 to_next[1] = bi1 = from[1];
2508 n_left_to_next -= 2;
2510 b0 = vlib_get_buffer (vm, bi0);
2511 b1 = vlib_get_buffer (vm, bi1);
2513 /* Default use the next_index from the adjacency. A HBH option rarely redirects to a different node */
2514 u32 adj_index0 = vnet_buffer (b0)->ip.adj_index[VLIB_TX];
2515 ip_adjacency_t *adj0 = adj_get (adj_index0);
2516 u32 adj_index1 = vnet_buffer (b1)->ip.adj_index[VLIB_TX];
2517 ip_adjacency_t *adj1 = adj_get (adj_index1);
2519 /* Default use the next_index from the adjacency. A HBH option rarely redirects to a different node */
2520 next0 = adj0->lookup_next_index;
2521 next1 = adj1->lookup_next_index;
2523 ip0 = vlib_buffer_get_current (b0);
2524 ip1 = vlib_buffer_get_current (b1);
2525 hbh0 = (ip6_hop_by_hop_header_t *) (ip0 + 1);
2526 hbh1 = (ip6_hop_by_hop_header_t *) (ip1 + 1);
2527 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2528 opt1 = (ip6_hop_by_hop_option_t *) (hbh1 + 1);
2530 (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 +
2531 ((hbh0->length + 1) << 3));
2533 (ip6_hop_by_hop_option_t *) ((u8 *) hbh1 +
2534 ((hbh1->length + 1) << 3));
2537 * Basic validity checks
2539 if ((hbh0->length + 1) << 3 >
2540 clib_net_to_host_u16 (ip0->payload_length))
2542 error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2543 next0 = IP_LOOKUP_NEXT_DROP;
2546 /* Scan the set of h-b-h options, process ones that we understand */
2547 error0 = ip6_scan_hbh_options (b0, ip0, hbh0, opt0, limit0, &next0);
2549 if ((hbh1->length + 1) << 3 >
2550 clib_net_to_host_u16 (ip1->payload_length))
2552 error1 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2553 next1 = IP_LOOKUP_NEXT_DROP;
2556 /* Scan the set of h-b-h options, process ones that we understand */
2557 error1 = ip6_scan_hbh_options (b1, ip1, hbh1, opt1, limit1, &next1);
2560 /* Has the classifier flagged this buffer for special treatment? */
2563 && (vnet_buffer (b0)->l2_classify.opaque_index & OI_DECAP)))
2564 next0 = hm->next_override;
2566 /* Has the classifier flagged this buffer for special treatment? */
2569 && (vnet_buffer (b1)->l2_classify.opaque_index & OI_DECAP)))
2570 next1 = hm->next_override;
2572 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)))
2574 if (b0->flags & VLIB_BUFFER_IS_TRACED)
2576 ip6_hop_by_hop_trace_t *t =
2577 vlib_add_trace (vm, node, b0, sizeof (*t));
2578 u32 trace_len = (hbh0->length + 1) << 3;
2579 t->next_index = next0;
2580 /* Capture the h-b-h option verbatim */
2583 ARRAY_LEN (t->option_data) ? trace_len :
2584 ARRAY_LEN (t->option_data);
2585 t->trace_len = trace_len;
2586 clib_memcpy_fast (t->option_data, hbh0, trace_len);
2588 if (b1->flags & VLIB_BUFFER_IS_TRACED)
2590 ip6_hop_by_hop_trace_t *t =
2591 vlib_add_trace (vm, node, b1, sizeof (*t));
2592 u32 trace_len = (hbh1->length + 1) << 3;
2593 t->next_index = next1;
2594 /* Capture the h-b-h option verbatim */
2597 ARRAY_LEN (t->option_data) ? trace_len :
2598 ARRAY_LEN (t->option_data);
2599 t->trace_len = trace_len;
2600 clib_memcpy_fast (t->option_data, hbh1, trace_len);
2605 b0->error = error_node->errors[error0];
2606 b1->error = error_node->errors[error1];
2608 /* verify speculative enqueue, maybe switch current next frame */
2609 vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
2610 n_left_to_next, bi0, bi1, next0,
2614 while (n_left_from > 0 && n_left_to_next > 0)
2620 ip6_hop_by_hop_header_t *hbh0;
2621 ip6_hop_by_hop_option_t *opt0, *limit0;
2624 /* Speculatively enqueue b0 to the current next frame */
2630 n_left_to_next -= 1;
2632 b0 = vlib_get_buffer (vm, bi0);
2634 * Default use the next_index from the adjacency.
2635 * A HBH option rarely redirects to a different node
2637 u32 adj_index0 = vnet_buffer (b0)->ip.adj_index[VLIB_TX];
2638 ip_adjacency_t *adj0 = adj_get (adj_index0);
2639 next0 = adj0->lookup_next_index;
2641 ip0 = vlib_buffer_get_current (b0);
2642 hbh0 = (ip6_hop_by_hop_header_t *) (ip0 + 1);
2643 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2645 (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 +
2646 ((hbh0->length + 1) << 3));
2649 * Basic validity checks
2651 if ((hbh0->length + 1) << 3 >
2652 clib_net_to_host_u16 (ip0->payload_length))
2654 error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2655 next0 = IP_LOOKUP_NEXT_DROP;
2659 /* Scan the set of h-b-h options, process ones that we understand */
2660 error0 = ip6_scan_hbh_options (b0, ip0, hbh0, opt0, limit0, &next0);
2663 /* Has the classifier flagged this buffer for special treatment? */
2666 && (vnet_buffer (b0)->l2_classify.opaque_index & OI_DECAP)))
2667 next0 = hm->next_override;
2669 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
2671 ip6_hop_by_hop_trace_t *t =
2672 vlib_add_trace (vm, node, b0, sizeof (*t));
2673 u32 trace_len = (hbh0->length + 1) << 3;
2674 t->next_index = next0;
2675 /* Capture the h-b-h option verbatim */
2678 ARRAY_LEN (t->option_data) ? trace_len :
2679 ARRAY_LEN (t->option_data);
2680 t->trace_len = trace_len;
2681 clib_memcpy_fast (t->option_data, hbh0, trace_len);
2684 b0->error = error_node->errors[error0];
2686 /* verify speculative enqueue, maybe switch current next frame */
2687 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
2688 n_left_to_next, bi0, next0);
2690 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2692 return frame->n_vectors;
2696 VLIB_REGISTER_NODE (ip6_hop_by_hop_node) =
2698 .name = "ip6-hop-by-hop",
2699 .sibling_of = "ip6-lookup",
2700 .vector_size = sizeof (u32),
2701 .format_trace = format_ip6_hop_by_hop_trace,
2702 .type = VLIB_NODE_TYPE_INTERNAL,
2703 .n_errors = ARRAY_LEN (ip6_hop_by_hop_error_strings),
2704 .error_strings = ip6_hop_by_hop_error_strings,
2709 static clib_error_t *
2710 ip6_hop_by_hop_init (vlib_main_t * vm)
2712 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2713 clib_memset (hm->options, 0, sizeof (hm->options));
2714 clib_memset (hm->trace, 0, sizeof (hm->trace));
2715 hm->next_override = IP6_LOOKUP_NEXT_POP_HOP_BY_HOP;
2719 VLIB_INIT_FUNCTION (ip6_hop_by_hop_init);
2721 #ifndef CLIB_MARCH_VARIANT
2723 ip6_hbh_set_next_override (uword next)
2725 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2727 hm->next_override = next;
2731 ip6_hbh_register_option (u8 option,
2732 int options (vlib_buffer_t * b, ip6_header_t * ip,
2733 ip6_hop_by_hop_option_t * opt),
2734 u8 * trace (u8 * s, ip6_hop_by_hop_option_t * opt))
2736 ip6_main_t *im = &ip6_main;
2737 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2739 ASSERT ((u32) option < ARRAY_LEN (hm->options));
2741 /* Already registered */
2742 if (hm->options[option])
2745 hm->options[option] = options;
2746 hm->trace[option] = trace;
2748 /* Set global variable */
2749 im->hbh_enabled = 1;
2755 ip6_hbh_unregister_option (u8 option)
2757 ip6_main_t *im = &ip6_main;
2758 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2760 ASSERT ((u32) option < ARRAY_LEN (hm->options));
2762 /* Not registered */
2763 if (!hm->options[option])
2766 hm->options[option] = NULL;
2767 hm->trace[option] = NULL;
2769 /* Disable global knob if this was the last option configured */
2772 for (i = 0; i < 256; i++)
2774 if (hm->options[option])
2781 im->hbh_enabled = 0;
2786 /* Global IP6 main. */
2787 ip6_main_t ip6_main;
2790 static clib_error_t *
2791 ip6_lookup_init (vlib_main_t * vm)
2793 ip6_main_t *im = &ip6_main;
2794 clib_error_t *error;
2797 if ((error = vlib_call_init_function (vm, vnet_feature_init)))
2800 for (i = 0; i < ARRAY_LEN (im->fib_masks); i++)
2807 for (j = 0; j < i0; j++)
2808 im->fib_masks[i].as_u32[j] = ~0;
2811 im->fib_masks[i].as_u32[i0] =
2812 clib_host_to_net_u32 (pow2_mask (i1) << (32 - i1));
2815 ip_lookup_init (&im->lookup_main, /* is_ip6 */ 1);
2817 /* Create FIB with index 0 and table id of 0. */
2818 fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6, 0,
2819 FIB_SOURCE_DEFAULT_ROUTE);
2820 mfib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6, 0,
2821 MFIB_SOURCE_DEFAULT_ROUTE);
2825 pn = pg_get_node (ip6_lookup_node.index);
2826 pn->unformat_edit = unformat_pg_ip6_header;
2829 /* Unless explicitly configured, don't process HBH options */
2830 im->hbh_enabled = 0;
2835 VLIB_INIT_FUNCTION (ip6_lookup_init);
2837 static clib_error_t *
2838 set_ip6_flow_hash_command_fn (vlib_main_t * vm,
2839 unformat_input_t * input,
2840 vlib_cli_command_t * cmd)
2844 u32 flow_hash_config = 0;
2847 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
2849 if (unformat (input, "table %d", &table_id))
2851 #define _(a, b, v) \
2852 else if (unformat (input, #a)) \
2854 flow_hash_config |= v; \
2857 foreach_flow_hash_bit
2864 return clib_error_return (0, "unknown input `%U'",
2865 format_unformat_error, input);
2867 rv = ip_flow_hash_set (AF_IP6, table_id, flow_hash_config);
2874 return clib_error_return (0, "no such FIB table %d", table_id);
2877 clib_warning ("BUG: illegal flow hash config 0x%x", flow_hash_config);
2885 * Configure the set of IPv6 fields used by the flow hash.
2889 * Example of how to set the flow hash on a given table:
2890 * @cliexcmd{set ip6 flow-hash table 8 dst sport dport proto}
2892 * Example of display the configured flow hash:
2893 * @cliexstart{show ip6 fib}
2894 * ipv6-VRF:0, fib_index 0, flow hash: src dst sport dport proto
2897 * [@0]: dpo-load-balance: [index:5 buckets:1 uRPF:5 to:[0:0]]
2898 * [0] [@0]: dpo-drop ip6
2901 * [@0]: dpo-load-balance: [index:10 buckets:1 uRPF:10 to:[0:0]]
2902 * [0] [@2]: dpo-receive
2905 * [@0]: dpo-load-balance: [index:8 buckets:1 uRPF:8 to:[0:0]]
2906 * [0] [@2]: dpo-receive
2909 * [@0]: dpo-load-balance: [index:7 buckets:1 uRPF:7 to:[0:0]]
2910 * [0] [@2]: dpo-receive
2913 * [@0]: dpo-load-balance: [index:9 buckets:1 uRPF:9 to:[0:0]]
2914 * [0] [@2]: dpo-receive
2915 * ff02::1:ff00:0/104
2917 * [@0]: dpo-load-balance: [index:6 buckets:1 uRPF:6 to:[0:0]]
2918 * [0] [@2]: dpo-receive
2919 * ipv6-VRF:8, fib_index 1, flow hash: dst sport dport proto
2922 * [@0]: dpo-load-balance: [index:21 buckets:1 uRPF:20 to:[0:0]]
2923 * [0] [@0]: dpo-drop ip6
2926 * [@0]: dpo-load-balance: [index:27 buckets:1 uRPF:26 to:[0:0]]
2927 * [0] [@4]: ipv6-glean: af_packet0
2930 * [@0]: dpo-load-balance: [index:28 buckets:1 uRPF:27 to:[0:0]]
2931 * [0] [@2]: dpo-receive: @::a:1:1:0:7 on af_packet0
2934 * [@0]: dpo-load-balance: [index:26 buckets:1 uRPF:25 to:[0:0]]
2935 * [0] [@2]: dpo-receive
2936 * fe80::fe:3eff:fe3e:9222/128
2938 * [@0]: dpo-load-balance: [index:29 buckets:1 uRPF:28 to:[0:0]]
2939 * [0] [@2]: dpo-receive: fe80::fe:3eff:fe3e:9222 on af_packet0
2942 * [@0]: dpo-load-balance: [index:24 buckets:1 uRPF:23 to:[0:0]]
2943 * [0] [@2]: dpo-receive
2946 * [@0]: dpo-load-balance: [index:23 buckets:1 uRPF:22 to:[0:0]]
2947 * [0] [@2]: dpo-receive
2950 * [@0]: dpo-load-balance: [index:25 buckets:1 uRPF:24 to:[0:0]]
2951 * [0] [@2]: dpo-receive
2952 * ff02::1:ff00:0/104
2954 * [@0]: dpo-load-balance: [index:22 buckets:1 uRPF:21 to:[0:0]]
2955 * [0] [@2]: dpo-receive
2960 VLIB_CLI_COMMAND (set_ip6_flow_hash_command, static) = {
2961 .path = "set ip6 flow-hash",
2962 .short_help = "set ip6 flow-hash table <table-id> [src] [dst] [sport] "
2963 "[dport] [proto] [reverse] [flowlabel]",
2964 .function = set_ip6_flow_hash_command_fn,
2968 static clib_error_t *
2969 show_ip6_local_command_fn (vlib_main_t * vm,
2970 unformat_input_t * input, vlib_cli_command_t * cmd)
2972 ip6_main_t *im = &ip6_main;
2973 ip_lookup_main_t *lm = &im->lookup_main;
2976 vlib_cli_output (vm, "Protocols handled by ip6_local");
2977 for (i = 0; i < ARRAY_LEN (lm->local_next_by_ip_protocol); i++)
2979 if (lm->local_next_by_ip_protocol[i] != IP_LOCAL_NEXT_PUNT)
2982 u32 node_index = vlib_get_node (vm,
2983 ip6_local_node.index)->
2984 next_nodes[lm->local_next_by_ip_protocol[i]];
2985 vlib_cli_output (vm, "%d: %U", i, format_vlib_node_name, vm,
2995 * Display the set of protocols handled by the local IPv6 stack.
2998 * Example of how to display local protocol table:
2999 * @cliexstart{show ip6 local}
3000 * Protocols handled by ip6_local
3008 VLIB_CLI_COMMAND (show_ip6_local, static) =
3010 .path = "show ip6 local",
3011 .function = show_ip6_local_command_fn,
3012 .short_help = "show ip6 local",
3016 #ifndef CLIB_MARCH_VARIANT
3018 vnet_set_ip6_classify_intfc (vlib_main_t *vm, u32 sw_if_index, u32 table_index)
3020 vnet_main_t *vnm = vnet_get_main ();
3021 vnet_interface_main_t *im = &vnm->interface_main;
3022 ip6_main_t *ipm = &ip6_main;
3023 ip_lookup_main_t *lm = &ipm->lookup_main;
3024 vnet_classify_main_t *cm = &vnet_classify_main;
3025 ip6_address_t *if_addr;
3027 if (pool_is_free_index (im->sw_interfaces, sw_if_index))
3028 return VNET_API_ERROR_NO_MATCHING_INTERFACE;
3030 if (table_index != ~0 && pool_is_free_index (cm->tables, table_index))
3031 return VNET_API_ERROR_NO_SUCH_ENTRY;
3033 vec_validate (lm->classify_table_index_by_sw_if_index, sw_if_index);
3034 lm->classify_table_index_by_sw_if_index[sw_if_index] = table_index;
3036 if_addr = ip6_interface_first_address (ipm, sw_if_index);
3038 if (NULL != if_addr)
3040 fib_prefix_t pfx = {
3042 .fp_proto = FIB_PROTOCOL_IP6,
3043 .fp_addr.ip6 = *if_addr,
3047 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;
3055 classify_dpo_create (DPO_PROTO_IP6, table_index));
3056 fib_table_entry_special_dpo_add (fib_index,
3058 FIB_SOURCE_CLASSIFY,
3059 FIB_ENTRY_FLAG_NONE, &dpo);
3064 fib_table_entry_special_remove (fib_index,
3065 &pfx, FIB_SOURCE_CLASSIFY);
3073 static clib_error_t *
3074 set_ip6_classify_command_fn (vlib_main_t * vm,
3075 unformat_input_t * input,
3076 vlib_cli_command_t * cmd)
3078 u32 table_index = ~0;
3079 int table_index_set = 0;
3080 u32 sw_if_index = ~0;
3083 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
3085 if (unformat (input, "table-index %d", &table_index))
3086 table_index_set = 1;
3087 else if (unformat (input, "intfc %U", unformat_vnet_sw_interface,
3088 vnet_get_main (), &sw_if_index))
3094 if (table_index_set == 0)
3095 return clib_error_return (0, "classify table-index must be specified");
3097 if (sw_if_index == ~0)
3098 return clib_error_return (0, "interface / subif must be specified");
3100 rv = vnet_set_ip6_classify_intfc (vm, sw_if_index, table_index);
3107 case VNET_API_ERROR_NO_MATCHING_INTERFACE:
3108 return clib_error_return (0, "No such interface");
3110 case VNET_API_ERROR_NO_SUCH_ENTRY:
3111 return clib_error_return (0, "No such classifier table");
3117 * Assign a classification table to an interface. The classification
3118 * table is created using the '<em>classify table</em>' and '<em>classify session</em>'
3119 * commands. Once the table is create, use this command to filter packets
3123 * Example of how to assign a classification table to an interface:
3124 * @cliexcmd{set ip6 classify intfc GigabitEthernet2/0/0 table-index 1}
3127 VLIB_CLI_COMMAND (set_ip6_classify_command, static) =
3129 .path = "set ip6 classify",
3131 "set ip6 classify intfc <interface> table-index <classify-idx>",
3132 .function = set_ip6_classify_command_fn,
3137 * fd.io coding-style-patch-verification: ON
3140 * eval: (c-set-style "gnu")