2 * Copyright (c) 2016 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
16 * ip/ip6_forward.c: IP v6 forwarding
18 * Copyright (c) 2008 Eliot Dresselhaus
20 * Permission is hereby granted, free of charge, to any person obtaining
21 * a copy of this software and associated documentation files (the
22 * "Software"), to deal in the Software without restriction, including
23 * without limitation the rights to use, copy, modify, merge, publish,
24 * distribute, sublicense, and/or sell copies of the Software, and to
25 * permit persons to whom the Software is furnished to do so, subject to
26 * the following conditions:
28 * The above copyright notice and this permission notice shall be
29 * included in all copies or substantial portions of the Software.
31 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
32 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
33 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
34 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
35 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
36 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
37 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
40 #include <vnet/vnet.h>
41 #include <vnet/ip/ip.h>
42 #include <vnet/ip/ip_frag.h>
43 #include <vnet/ip/ip6_link.h>
44 #include <vnet/ethernet/ethernet.h> /* for ethernet_header_t */
45 #include <vnet/srp/srp.h> /* for srp_hw_interface_class */
46 #include <vppinfra/cache.h>
47 #include <vnet/fib/fib_urpf_list.h> /* for FIB uRPF check */
48 #include <vnet/fib/ip6_fib.h>
49 #include <vnet/mfib/ip6_mfib.h>
50 #include <vnet/dpo/load_balance_map.h>
51 #include <vnet/dpo/classify_dpo.h>
52 #include <vnet/classify/vnet_classify.h>
54 #ifndef CLIB_MARCH_VARIANT
55 #include <vppinfra/bihash_template.c>
57 #include <vnet/ip/ip6_forward.h>
58 #include <vnet/interface_output.h>
60 /* Flag used by IOAM code. Classifier sets it pop-hop-by-hop checks it */
61 #define OI_DECAP 0x80000000
64 ip6_add_interface_prefix_routes (ip6_main_t * im,
67 ip6_address_t * address, u32 address_length)
69 ip_lookup_main_t *lm = &im->lookup_main;
70 ip_interface_prefix_t *if_prefix;
73 ip_interface_prefix_key_t key = {
75 .fp_len = address_length,
76 .fp_proto = FIB_PROTOCOL_IP6,
79 address->as_u64[0] & im->fib_masks[address_length].as_u64[0],
80 address->as_u64[1] & im->fib_masks[address_length].as_u64[1],
84 .sw_if_index = sw_if_index,
88 /* If prefix already set on interface, just increment ref count & return */
89 if_prefix = ip_get_interface_prefix (lm, &key);
92 if_prefix->ref_count += 1;
96 /* New prefix - allocate a pool entry, initialize it, add to the hash */
97 pool_get (lm->if_prefix_pool, if_prefix);
98 if_prefix->ref_count = 1;
99 clib_memcpy (&if_prefix->key, &key, sizeof (key));
100 mhash_set (&lm->prefix_to_if_prefix_index, &key,
101 if_prefix - lm->if_prefix_pool, 0 /* old value */ );
103 /* length < 128 - add glean */
104 if (address_length < 128)
106 /* set the glean route for the prefix */
107 fib_table_entry_update_one_path (fib_index, &key.prefix,
108 FIB_SOURCE_INTERFACE,
109 (FIB_ENTRY_FLAG_CONNECTED |
110 FIB_ENTRY_FLAG_ATTACHED),
112 /* No next-hop address */
114 /* invalid FIB index */
116 /* no out-label stack */
117 NULL, FIB_ROUTE_PATH_FLAG_NONE);
122 ip6_add_interface_routes (vnet_main_t * vnm, u32 sw_if_index,
123 ip6_main_t * im, u32 fib_index,
124 ip_interface_address_t * a)
126 ip_lookup_main_t *lm = &im->lookup_main;
127 ip6_address_t *address = ip_interface_address_get_address (lm, a);
129 .fp_len = a->address_length,
130 .fp_proto = FIB_PROTOCOL_IP6,
131 .fp_addr.ip6 = *address,
134 /* set special routes for the prefix if needed */
135 ip6_add_interface_prefix_routes (im, sw_if_index, fib_index,
136 address, a->address_length);
139 if (sw_if_index < vec_len (lm->classify_table_index_by_sw_if_index))
141 u32 classify_table_index =
142 lm->classify_table_index_by_sw_if_index[sw_if_index];
143 if (classify_table_index != (u32) ~ 0)
145 dpo_id_t dpo = DPO_INVALID;
150 classify_dpo_create (DPO_PROTO_IP6, classify_table_index));
152 fib_table_entry_special_dpo_add (fib_index,
155 FIB_ENTRY_FLAG_NONE, &dpo);
160 fib_table_entry_update_one_path (fib_index, &pfx,
161 FIB_SOURCE_INTERFACE,
162 (FIB_ENTRY_FLAG_CONNECTED |
163 FIB_ENTRY_FLAG_LOCAL),
167 1, NULL, FIB_ROUTE_PATH_FLAG_NONE);
171 ip6_del_interface_prefix_routes (ip6_main_t * im,
174 ip6_address_t * address, u32 address_length)
176 ip_lookup_main_t *lm = &im->lookup_main;
177 ip_interface_prefix_t *if_prefix;
180 ip_interface_prefix_key_t key = {
182 .fp_len = address_length,
183 .fp_proto = FIB_PROTOCOL_IP6,
186 address->as_u64[0] & im->fib_masks[address_length].as_u64[0],
187 address->as_u64[1] & im->fib_masks[address_length].as_u64[1],
191 .sw_if_index = sw_if_index,
195 if_prefix = ip_get_interface_prefix (lm, &key);
198 clib_warning ("Prefix not found while deleting %U",
199 format_ip4_address_and_length, address, address_length);
203 /* If not deleting last intf addr in prefix, decrement ref count & return */
204 if_prefix->ref_count -= 1;
205 if (if_prefix->ref_count > 0)
208 /* length <= 128, delete glean route */
209 if (address_length <= 128)
211 /* remove glean route for prefix */
212 fib_table_entry_delete (fib_index, &key.prefix, FIB_SOURCE_INTERFACE);
215 mhash_unset (&lm->prefix_to_if_prefix_index, &key, 0 /* old_value */ );
216 pool_put (lm->if_prefix_pool, if_prefix);
220 ip6_del_interface_routes (u32 sw_if_index, ip6_main_t * im,
222 ip6_address_t * address, u32 address_length)
226 .fp_proto = FIB_PROTOCOL_IP6,
227 .fp_addr.ip6 = *address,
230 /* delete special routes for the prefix if needed */
231 ip6_del_interface_prefix_routes (im, sw_if_index, fib_index,
232 address, address_length);
234 fib_table_entry_delete (fib_index, &pfx, FIB_SOURCE_INTERFACE);
237 #ifndef CLIB_MARCH_VARIANT
239 ip6_sw_interface_enable_disable (u32 sw_if_index, u32 is_enable)
241 ip6_main_t *im = &ip6_main;
243 vec_validate_init_empty (im->ip_enabled_by_sw_if_index, sw_if_index, 0);
246 * enable/disable only on the 1<->0 transition
250 if (1 != ++im->ip_enabled_by_sw_if_index[sw_if_index])
255 /* The ref count is 0 when an address is removed from an interface that has
256 * no address - this is not a ciritical error */
257 if (0 == im->ip_enabled_by_sw_if_index[sw_if_index] ||
258 0 != --im->ip_enabled_by_sw_if_index[sw_if_index])
262 vnet_feature_enable_disable ("ip6-unicast", "ip6-not-enabled", sw_if_index,
265 vnet_feature_enable_disable ("ip6-multicast", "ip6-not-enabled",
266 sw_if_index, !is_enable, 0, 0);
269 /* get first interface address */
271 ip6_interface_first_address (ip6_main_t * im, u32 sw_if_index)
273 ip_lookup_main_t *lm = &im->lookup_main;
274 ip_interface_address_t *ia = 0;
275 ip6_address_t *result = 0;
278 foreach_ip_interface_address (lm, ia, sw_if_index,
279 1 /* honor unnumbered */,
281 ip6_address_t * a = ip_interface_address_get_address (lm, ia);
290 ip6_add_del_interface_address (vlib_main_t * vm,
292 ip6_address_t * address,
293 u32 address_length, u32 is_del)
295 vnet_main_t *vnm = vnet_get_main ();
296 ip6_main_t *im = &ip6_main;
297 ip_lookup_main_t *lm = &im->lookup_main;
298 clib_error_t *error = NULL;
299 u32 if_address_index;
300 ip6_address_fib_t ip6_af, *addr_fib = 0;
301 const ip6_address_t *ll_addr;
303 /* local0 interface doesn't support IP addressing */
304 if (sw_if_index == 0)
307 clib_error_create ("local0 interface doesn't support IP addressing");
310 if (ip6_address_is_link_local_unicast (address))
312 if (address_length != 128)
314 vnm->api_errno = VNET_API_ERROR_ADDRESS_LENGTH_MISMATCH;
317 ("prefix length of link-local address must be 128");
323 rv = ip6_set_link_local_address (sw_if_index, address);
328 return clib_error_create ("address not assignable");
333 ll_addr = ip6_get_link_local_address (sw_if_index);
334 if (ip6_address_is_equal (ll_addr, address))
336 vnm->api_errno = VNET_API_ERROR_ADDRESS_NOT_DELETABLE;
337 return clib_error_create ("address not deletable");
341 vnm->api_errno = VNET_API_ERROR_ADDRESS_NOT_FOUND_FOR_INTERFACE;
342 return clib_error_create ("address not found");
347 vec_validate (im->fib_index_by_sw_if_index, sw_if_index);
348 vec_validate (im->mfib_index_by_sw_if_index, sw_if_index);
350 ip6_addr_fib_init (&ip6_af, address,
351 vec_elt (im->fib_index_by_sw_if_index, sw_if_index));
352 vec_add1 (addr_fib, ip6_af);
357 /* When adding an address check that it does not conflict
358 with an existing address on any interface in this table. */
359 ip_interface_address_t *ia;
360 vnet_sw_interface_t *sif;
362 pool_foreach(sif, vnm->interface_main.sw_interfaces,
364 if (im->fib_index_by_sw_if_index[sw_if_index] ==
365 im->fib_index_by_sw_if_index[sif->sw_if_index])
367 foreach_ip_interface_address
368 (&im->lookup_main, ia, sif->sw_if_index,
369 0 /* honor unnumbered */ ,
372 ip_interface_address_get_address
373 (&im->lookup_main, ia);
375 if (ip6_destination_matches_route
376 (im, address, x, ia->address_length) ||
377 ip6_destination_matches_route (im,
382 /* an intf may have >1 addr from the same prefix */
383 if ((sw_if_index == sif->sw_if_index) &&
384 (ia->address_length == address_length) &&
385 !ip6_address_is_equal (x, address))
388 if (ia->flags & IP_INTERFACE_ADDRESS_FLAG_STALE)
389 /* if the address we're comparing against is stale
390 * then the CP has not added this one back yet, maybe
391 * it never will, so we have to assume it won't and
392 * ignore it. if it does add it back, then it will fail
393 * because this one is now present */
396 /* error if the length or intf was different */
397 vnm->api_errno = VNET_API_ERROR_DUPLICATE_IF_ADDRESS;
398 error = clib_error_create
399 ("failed to add %U which conflicts with %U for interface %U",
400 format_ip6_address_and_length, address,
402 format_ip6_address_and_length, x,
404 format_vnet_sw_if_index_name, vnm,
414 if_address_index = ip_interface_address_find (lm, addr_fib, address_length);
418 if (~0 == if_address_index)
420 vnm->api_errno = VNET_API_ERROR_ADDRESS_NOT_FOUND_FOR_INTERFACE;
421 error = clib_error_create ("%U not found for interface %U",
422 lm->format_address_and_length,
423 addr_fib, address_length,
424 format_vnet_sw_if_index_name, vnm,
429 ip_interface_address_del (lm, if_address_index, addr_fib);
433 if (~0 != if_address_index)
435 ip_interface_address_t *ia;
437 ia = pool_elt_at_index (lm->if_address_pool, if_address_index);
439 if (ia->flags & IP_INTERFACE_ADDRESS_FLAG_STALE)
441 if (ia->sw_if_index == sw_if_index)
443 /* re-adding an address during the replace action.
444 * consdier this the update. clear the flag and
446 ia->flags &= ~IP_INTERFACE_ADDRESS_FLAG_STALE;
451 /* The prefix is moving from one interface to another.
452 * delete the stale and add the new */
453 ip6_add_del_interface_address (vm,
455 address, address_length, 1);
457 error = ip_interface_address_add (lm, sw_if_index,
458 addr_fib, address_length,
464 vnm->api_errno = VNET_API_ERROR_DUPLICATE_IF_ADDRESS;
465 error = clib_error_create
466 ("Prefix %U already found on interface %U",
467 lm->format_address_and_length, addr_fib, address_length,
468 format_vnet_sw_if_index_name, vnm, ia->sw_if_index);
472 error = ip_interface_address_add (lm, sw_if_index,
473 addr_fib, address_length,
480 ip6_sw_interface_enable_disable (sw_if_index, !is_del);
482 ip6_link_enable (sw_if_index);
484 /* intf addr routes are added/deleted on admin up/down */
485 if (vnet_sw_interface_is_admin_up (vnm, sw_if_index))
488 ip6_del_interface_routes (sw_if_index,
489 im, ip6_af.fib_index, address,
492 ip6_add_interface_routes (vnm, sw_if_index,
493 im, ip6_af.fib_index,
494 pool_elt_at_index (lm->if_address_pool,
498 ip6_add_del_interface_address_callback_t *cb;
499 vec_foreach (cb, im->add_del_interface_address_callbacks)
500 cb->function (im, cb->function_opaque, sw_if_index,
501 address, address_length, if_address_index, is_del);
504 ip6_link_disable (sw_if_index);
513 static clib_error_t *
514 ip6_sw_interface_admin_up_down (vnet_main_t * vnm, u32 sw_if_index, u32 flags)
516 ip6_main_t *im = &ip6_main;
517 ip_interface_address_t *ia;
519 u32 is_admin_up, fib_index;
521 /* Fill in lookup tables with default table (0). */
522 vec_validate (im->fib_index_by_sw_if_index, sw_if_index);
524 vec_validate_init_empty (im->
525 lookup_main.if_address_pool_index_by_sw_if_index,
528 is_admin_up = (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) != 0;
530 fib_index = vec_elt (im->fib_index_by_sw_if_index, sw_if_index);
533 foreach_ip_interface_address (&im->lookup_main, ia, sw_if_index,
534 0 /* honor unnumbered */,
536 a = ip_interface_address_get_address (&im->lookup_main, ia);
538 ip6_add_interface_routes (vnm, sw_if_index,
542 ip6_del_interface_routes (sw_if_index, im, fib_index,
543 a, ia->address_length);
550 VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION (ip6_sw_interface_admin_up_down);
552 /* Built-in ip6 unicast rx feature path definition */
554 VNET_FEATURE_ARC_INIT (ip6_unicast, static) =
556 .arc_name = "ip6-unicast",
557 .start_nodes = VNET_FEATURES ("ip6-input"),
558 .last_in_arc = "ip6-lookup",
559 .arc_index_ptr = &ip6_main.lookup_main.ucast_feature_arc_index,
562 VNET_FEATURE_INIT (ip6_flow_classify, static) =
564 .arc_name = "ip6-unicast",
565 .node_name = "ip6-flow-classify",
566 .runs_before = VNET_FEATURES ("ip6-inacl"),
569 VNET_FEATURE_INIT (ip6_inacl, static) =
571 .arc_name = "ip6-unicast",
572 .node_name = "ip6-inacl",
573 .runs_before = VNET_FEATURES ("ip6-policer-classify"),
576 VNET_FEATURE_INIT (ip6_policer_classify, static) =
578 .arc_name = "ip6-unicast",
579 .node_name = "ip6-policer-classify",
580 .runs_before = VNET_FEATURES ("ipsec6-input-feature"),
583 VNET_FEATURE_INIT (ip6_ipsec, static) =
585 .arc_name = "ip6-unicast",
586 .node_name = "ipsec6-input-feature",
587 .runs_before = VNET_FEATURES ("l2tp-decap"),
590 VNET_FEATURE_INIT (ip6_l2tp, static) =
592 .arc_name = "ip6-unicast",
593 .node_name = "l2tp-decap",
594 .runs_before = VNET_FEATURES ("vpath-input-ip6"),
597 VNET_FEATURE_INIT (ip6_vpath, static) =
599 .arc_name = "ip6-unicast",
600 .node_name = "vpath-input-ip6",
601 .runs_before = VNET_FEATURES ("ip6-vxlan-bypass"),
604 VNET_FEATURE_INIT (ip6_vxlan_bypass, static) =
606 .arc_name = "ip6-unicast",
607 .node_name = "ip6-vxlan-bypass",
608 .runs_before = VNET_FEATURES ("ip6-lookup"),
611 VNET_FEATURE_INIT (ip6_not_enabled, static) =
613 .arc_name = "ip6-unicast",
614 .node_name = "ip6-not-enabled",
615 .runs_before = VNET_FEATURES ("ip6-lookup"),
618 VNET_FEATURE_INIT (ip6_lookup, static) =
620 .arc_name = "ip6-unicast",
621 .node_name = "ip6-lookup",
622 .runs_before = 0, /*last feature*/
625 /* Built-in ip6 multicast rx feature path definition (none now) */
626 VNET_FEATURE_ARC_INIT (ip6_multicast, static) =
628 .arc_name = "ip6-multicast",
629 .start_nodes = VNET_FEATURES ("ip6-input"),
630 .last_in_arc = "ip6-mfib-forward-lookup",
631 .arc_index_ptr = &ip6_main.lookup_main.mcast_feature_arc_index,
634 VNET_FEATURE_INIT (ip6_vpath_mc, static) = {
635 .arc_name = "ip6-multicast",
636 .node_name = "vpath-input-ip6",
637 .runs_before = VNET_FEATURES ("ip6-mfib-forward-lookup"),
640 VNET_FEATURE_INIT (ip6_not_enabled_mc, static) = {
641 .arc_name = "ip6-multicast",
642 .node_name = "ip6-not-enabled",
643 .runs_before = VNET_FEATURES ("ip6-mfib-forward-lookup"),
646 VNET_FEATURE_INIT (ip6_mc_lookup, static) = {
647 .arc_name = "ip6-multicast",
648 .node_name = "ip6-mfib-forward-lookup",
649 .runs_before = 0, /* last feature */
652 /* Built-in ip4 tx feature path definition */
653 VNET_FEATURE_ARC_INIT (ip6_output, static) =
655 .arc_name = "ip6-output",
656 .start_nodes = VNET_FEATURES ("ip6-rewrite", "ip6-midchain", "ip6-dvr-dpo"),
657 .last_in_arc = "interface-output",
658 .arc_index_ptr = &ip6_main.lookup_main.output_feature_arc_index,
661 VNET_FEATURE_INIT (ip6_outacl, static) = {
662 .arc_name = "ip6-output",
663 .node_name = "ip6-outacl",
664 .runs_before = VNET_FEATURES ("ipsec6-output-feature"),
667 VNET_FEATURE_INIT (ip6_ipsec_output, static) = {
668 .arc_name = "ip6-output",
669 .node_name = "ipsec6-output-feature",
670 .runs_before = VNET_FEATURES ("interface-output"),
673 VNET_FEATURE_INIT (ip6_interface_output, static) = {
674 .arc_name = "ip6-output",
675 .node_name = "interface-output",
676 .runs_before = 0, /* not before any other features */
680 static clib_error_t *
681 ip6_sw_interface_add_del (vnet_main_t * vnm, u32 sw_if_index, u32 is_add)
683 ip6_main_t *im = &ip6_main;
685 vec_validate (im->fib_index_by_sw_if_index, sw_if_index);
686 vec_validate (im->mfib_index_by_sw_if_index, sw_if_index);
690 /* Ensure that IPv6 is disabled */
691 ip6_main_t *im6 = &ip6_main;
692 ip_lookup_main_t *lm6 = &im6->lookup_main;
693 ip_interface_address_t *ia = 0;
694 ip6_address_t *address;
695 vlib_main_t *vm = vlib_get_main ();
697 vnet_sw_interface_update_unnumbered (sw_if_index, ~0, 0);
699 foreach_ip_interface_address (lm6, ia, sw_if_index, 0,
701 address = ip_interface_address_get_address (lm6, ia);
702 ip6_add_del_interface_address(vm, sw_if_index, address, ia->address_length, 1);
705 ip6_mfib_interface_enable_disable (sw_if_index, 0);
708 vnet_feature_enable_disable ("ip6-unicast", "ip6-not-enabled", sw_if_index,
711 vnet_feature_enable_disable ("ip6-multicast", "ip6-not-enabled",
712 sw_if_index, is_add, 0, 0);
714 return /* no error */ 0;
717 VNET_SW_INTERFACE_ADD_DEL_FUNCTION (ip6_sw_interface_add_del);
719 VLIB_NODE_FN (ip6_lookup_node) (vlib_main_t * vm,
720 vlib_node_runtime_t * node,
721 vlib_frame_t * frame)
723 return ip6_lookup_inline (vm, node, frame);
726 static u8 *format_ip6_lookup_trace (u8 * s, va_list * args);
729 VLIB_REGISTER_NODE (ip6_lookup_node) =
731 .name = "ip6-lookup",
732 .vector_size = sizeof (u32),
733 .format_trace = format_ip6_lookup_trace,
734 .n_next_nodes = IP6_LOOKUP_N_NEXT,
735 .next_nodes = IP6_LOOKUP_NEXT_NODES,
739 VLIB_NODE_FN (ip6_load_balance_node) (vlib_main_t * vm,
740 vlib_node_runtime_t * node,
741 vlib_frame_t * frame)
743 vlib_combined_counter_main_t *cm = &load_balance_main.lbm_via_counters;
745 u32 thread_index = vm->thread_index;
746 ip6_main_t *im = &ip6_main;
747 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs;
748 u16 nexts[VLIB_FRAME_SIZE], *next;
750 from = vlib_frame_vector_args (frame);
751 n_left = frame->n_vectors;
754 vlib_get_buffers (vm, from, bufs, n_left);
758 const load_balance_t *lb0, *lb1;
759 const ip6_header_t *ip0, *ip1;
760 u32 lbi0, hc0, lbi1, hc1;
761 const dpo_id_t *dpo0, *dpo1;
763 /* Prefetch next iteration. */
765 vlib_prefetch_buffer_header (b[2], STORE);
766 vlib_prefetch_buffer_header (b[3], STORE);
768 CLIB_PREFETCH (b[2]->data, sizeof (ip0[0]), STORE);
769 CLIB_PREFETCH (b[3]->data, sizeof (ip0[0]), STORE);
772 ip0 = vlib_buffer_get_current (b[0]);
773 ip1 = vlib_buffer_get_current (b[1]);
774 lbi0 = vnet_buffer (b[0])->ip.adj_index[VLIB_TX];
775 lbi1 = vnet_buffer (b[1])->ip.adj_index[VLIB_TX];
777 lb0 = load_balance_get (lbi0);
778 lb1 = load_balance_get (lbi1);
781 * this node is for via FIBs we can re-use the hash value from the
782 * to node if present.
783 * We don't want to use the same hash value at each level in the recursion
784 * graph as that would lead to polarisation
788 if (PREDICT_FALSE (lb0->lb_n_buckets > 1))
790 if (PREDICT_TRUE (vnet_buffer (b[0])->ip.flow_hash))
792 hc0 = vnet_buffer (b[0])->ip.flow_hash =
793 vnet_buffer (b[0])->ip.flow_hash >> 1;
797 hc0 = vnet_buffer (b[0])->ip.flow_hash =
798 ip6_compute_flow_hash (ip0, lb0->lb_hash_config);
800 dpo0 = load_balance_get_fwd_bucket
801 (lb0, (hc0 & (lb0->lb_n_buckets_minus_1)));
805 dpo0 = load_balance_get_bucket_i (lb0, 0);
807 if (PREDICT_FALSE (lb1->lb_n_buckets > 1))
809 if (PREDICT_TRUE (vnet_buffer (b[1])->ip.flow_hash))
811 hc1 = vnet_buffer (b[1])->ip.flow_hash =
812 vnet_buffer (b[1])->ip.flow_hash >> 1;
816 hc1 = vnet_buffer (b[1])->ip.flow_hash =
817 ip6_compute_flow_hash (ip1, lb1->lb_hash_config);
819 dpo1 = load_balance_get_fwd_bucket
820 (lb1, (hc1 & (lb1->lb_n_buckets_minus_1)));
824 dpo1 = load_balance_get_bucket_i (lb1, 0);
827 next[0] = dpo0->dpoi_next_node;
828 next[1] = dpo1->dpoi_next_node;
830 /* Only process the HBH Option Header if explicitly configured to do so */
831 if (PREDICT_FALSE (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
833 next[0] = (dpo_is_adj (dpo0) && im->hbh_enabled) ?
834 (ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next[0];
836 /* Only process the HBH Option Header if explicitly configured to do so */
837 if (PREDICT_FALSE (ip1->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
839 next[1] = (dpo_is_adj (dpo1) && im->hbh_enabled) ?
840 (ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next[1];
843 vnet_buffer (b[0])->ip.adj_index[VLIB_TX] = dpo0->dpoi_index;
844 vnet_buffer (b[1])->ip.adj_index[VLIB_TX] = dpo1->dpoi_index;
846 vlib_increment_combined_counter
847 (cm, thread_index, lbi0, 1, vlib_buffer_length_in_chain (vm, b[0]));
848 vlib_increment_combined_counter
849 (cm, thread_index, lbi1, 1, vlib_buffer_length_in_chain (vm, b[1]));
858 const load_balance_t *lb0;
859 const ip6_header_t *ip0;
860 const dpo_id_t *dpo0;
863 ip0 = vlib_buffer_get_current (b[0]);
864 lbi0 = vnet_buffer (b[0])->ip.adj_index[VLIB_TX];
866 lb0 = load_balance_get (lbi0);
869 if (PREDICT_FALSE (lb0->lb_n_buckets > 1))
871 if (PREDICT_TRUE (vnet_buffer (b[0])->ip.flow_hash))
873 hc0 = vnet_buffer (b[0])->ip.flow_hash =
874 vnet_buffer (b[0])->ip.flow_hash >> 1;
878 hc0 = vnet_buffer (b[0])->ip.flow_hash =
879 ip6_compute_flow_hash (ip0, lb0->lb_hash_config);
881 dpo0 = load_balance_get_fwd_bucket
882 (lb0, (hc0 & (lb0->lb_n_buckets_minus_1)));
886 dpo0 = load_balance_get_bucket_i (lb0, 0);
889 next[0] = dpo0->dpoi_next_node;
890 vnet_buffer (b[0])->ip.adj_index[VLIB_TX] = dpo0->dpoi_index;
892 /* Only process the HBH Option Header if explicitly configured to do so */
893 if (PREDICT_FALSE (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
895 next[0] = (dpo_is_adj (dpo0) && im->hbh_enabled) ?
896 (ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next[0];
899 vlib_increment_combined_counter
900 (cm, thread_index, lbi0, 1, vlib_buffer_length_in_chain (vm, b[0]));
907 vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors);
909 if (node->flags & VLIB_NODE_FLAG_TRACE)
910 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
912 return frame->n_vectors;
916 VLIB_REGISTER_NODE (ip6_load_balance_node) =
918 .name = "ip6-load-balance",
919 .vector_size = sizeof (u32),
920 .sibling_of = "ip6-lookup",
921 .format_trace = format_ip6_lookup_trace,
927 /* Adjacency taken. */
932 /* Packet data, possibly *after* rewrite. */
933 u8 packet_data[128 - 1 * sizeof (u32)];
935 ip6_forward_next_trace_t;
937 #ifndef CLIB_MARCH_VARIANT
939 format_ip6_forward_next_trace (u8 * s, va_list * args)
941 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
942 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
943 ip6_forward_next_trace_t *t = va_arg (*args, ip6_forward_next_trace_t *);
944 u32 indent = format_get_indent (s);
946 s = format (s, "%U%U",
947 format_white_space, indent,
948 format_ip6_header, t->packet_data, sizeof (t->packet_data));
954 format_ip6_lookup_trace (u8 * s, va_list * args)
956 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
957 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
958 ip6_forward_next_trace_t *t = va_arg (*args, ip6_forward_next_trace_t *);
959 u32 indent = format_get_indent (s);
961 s = format (s, "fib %d dpo-idx %d flow hash: 0x%08x",
962 t->fib_index, t->adj_index, t->flow_hash);
963 s = format (s, "\n%U%U",
964 format_white_space, indent,
965 format_ip6_header, t->packet_data, sizeof (t->packet_data));
971 format_ip6_rewrite_trace (u8 * s, va_list * args)
973 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
974 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
975 ip6_forward_next_trace_t *t = va_arg (*args, ip6_forward_next_trace_t *);
976 u32 indent = format_get_indent (s);
978 s = format (s, "tx_sw_if_index %d adj-idx %d : %U flow hash: 0x%08x",
979 t->fib_index, t->adj_index, format_ip_adjacency,
980 t->adj_index, FORMAT_IP_ADJACENCY_NONE, t->flow_hash);
981 s = format (s, "\n%U%U",
982 format_white_space, indent,
983 format_ip_adjacency_packet_data,
984 t->packet_data, sizeof (t->packet_data));
988 /* Common trace function for all ip6-forward next nodes. */
989 #ifndef CLIB_MARCH_VARIANT
991 ip6_forward_next_trace (vlib_main_t * vm,
992 vlib_node_runtime_t * node,
993 vlib_frame_t * frame, vlib_rx_or_tx_t which_adj_index)
996 ip6_main_t *im = &ip6_main;
998 n_left = frame->n_vectors;
999 from = vlib_frame_vector_args (frame);
1004 vlib_buffer_t *b0, *b1;
1005 ip6_forward_next_trace_t *t0, *t1;
1007 /* Prefetch next iteration. */
1008 vlib_prefetch_buffer_with_index (vm, from[2], LOAD);
1009 vlib_prefetch_buffer_with_index (vm, from[3], LOAD);
1014 b0 = vlib_get_buffer (vm, bi0);
1015 b1 = vlib_get_buffer (vm, bi1);
1017 if (b0->flags & VLIB_BUFFER_IS_TRACED)
1019 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
1020 t0->adj_index = vnet_buffer (b0)->ip.adj_index[which_adj_index];
1021 t0->flow_hash = vnet_buffer (b0)->ip.flow_hash;
1023 (vnet_buffer (b0)->sw_if_index[VLIB_TX] !=
1024 (u32) ~ 0) ? vnet_buffer (b0)->sw_if_index[VLIB_TX] :
1025 vec_elt (im->fib_index_by_sw_if_index,
1026 vnet_buffer (b0)->sw_if_index[VLIB_RX]);
1028 clib_memcpy_fast (t0->packet_data,
1029 vlib_buffer_get_current (b0),
1030 sizeof (t0->packet_data));
1032 if (b1->flags & VLIB_BUFFER_IS_TRACED)
1034 t1 = vlib_add_trace (vm, node, b1, sizeof (t1[0]));
1035 t1->adj_index = vnet_buffer (b1)->ip.adj_index[which_adj_index];
1036 t1->flow_hash = vnet_buffer (b1)->ip.flow_hash;
1038 (vnet_buffer (b1)->sw_if_index[VLIB_TX] !=
1039 (u32) ~ 0) ? vnet_buffer (b1)->sw_if_index[VLIB_TX] :
1040 vec_elt (im->fib_index_by_sw_if_index,
1041 vnet_buffer (b1)->sw_if_index[VLIB_RX]);
1043 clib_memcpy_fast (t1->packet_data,
1044 vlib_buffer_get_current (b1),
1045 sizeof (t1->packet_data));
1055 ip6_forward_next_trace_t *t0;
1059 b0 = vlib_get_buffer (vm, bi0);
1061 if (b0->flags & VLIB_BUFFER_IS_TRACED)
1063 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
1064 t0->adj_index = vnet_buffer (b0)->ip.adj_index[which_adj_index];
1065 t0->flow_hash = vnet_buffer (b0)->ip.flow_hash;
1067 (vnet_buffer (b0)->sw_if_index[VLIB_TX] !=
1068 (u32) ~ 0) ? vnet_buffer (b0)->sw_if_index[VLIB_TX] :
1069 vec_elt (im->fib_index_by_sw_if_index,
1070 vnet_buffer (b0)->sw_if_index[VLIB_RX]);
1072 clib_memcpy_fast (t0->packet_data,
1073 vlib_buffer_get_current (b0),
1074 sizeof (t0->packet_data));
1081 /* Compute TCP/UDP/ICMP6 checksum in software. */
1083 ip6_tcp_udp_icmp_compute_checksum (vlib_main_t * vm, vlib_buffer_t * p0,
1084 ip6_header_t * ip0, int *bogus_lengthp)
1087 u16 payload_length, payload_length_host_byte_order;
1089 u32 headers_size = sizeof (ip0[0]);
1090 u8 *data_this_buffer;
1091 u8 next_hdr = ip0->protocol;
1093 ASSERT (bogus_lengthp);
1096 payload_length_host_byte_order = clib_net_to_host_u16 (ip0->payload_length);
1097 data_this_buffer = (u8 *) (ip0 + 1);
1098 payload_length = ip0->payload_length;
1100 /* some icmp packets may come with a "router alert" hop-by-hop extension header (e.g., mldv2 packets)
1101 * or UDP-Ping packets */
1102 if (PREDICT_FALSE (next_hdr == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
1105 ip6_hop_by_hop_ext_t *ext_hdr =
1106 (ip6_hop_by_hop_ext_t *) data_this_buffer;
1108 /* validate really icmp6 next */
1109 ASSERT ((ext_hdr->next_hdr == IP_PROTOCOL_ICMP6)
1110 || (ext_hdr->next_hdr == IP_PROTOCOL_UDP));
1112 skip_bytes = 8 * (1 + ext_hdr->n_data_u64s);
1113 data_this_buffer = (void *) ((u8 *) data_this_buffer + skip_bytes);
1115 payload_length_host_byte_order -= skip_bytes;
1116 headers_size += skip_bytes;
1118 /* pseudo-header adjustments:
1119 * exclude ext header bytes from payload length
1120 * use payload IP proto rather than ext header IP proto
1122 payload_length = clib_host_to_net_u16 (payload_length_host_byte_order);
1123 next_hdr = ext_hdr->next_hdr;
1126 /* Initialize checksum with ip pseudo-header. */
1127 sum0 = payload_length + clib_host_to_net_u16 (next_hdr);
1129 for (i = 0; i < ARRAY_LEN (ip0->src_address.as_uword); i++)
1131 sum0 = ip_csum_with_carry
1132 (sum0, clib_mem_unaligned (&ip0->src_address.as_uword[i], uword));
1133 sum0 = ip_csum_with_carry
1134 (sum0, clib_mem_unaligned (&ip0->dst_address.as_uword[i], uword));
1138 return ip_calculate_l4_checksum (vm, p0, sum0,
1139 payload_length_host_byte_order,
1140 (u8 *) ip0, headers_size, NULL);
1142 return ip_calculate_l4_checksum (vm, 0, sum0,
1143 payload_length_host_byte_order, NULL, 0,
1148 ip6_tcp_udp_icmp_validate_checksum (vlib_main_t * vm, vlib_buffer_t * p0)
1150 ip6_header_t *ip0 = vlib_buffer_get_current (p0);
1155 /* some icmp packets may come with a "router alert" hop-by-hop extension header (e.g., mldv2 packets) */
1156 ASSERT (ip0->protocol == IP_PROTOCOL_TCP
1157 || ip0->protocol == IP_PROTOCOL_ICMP6
1158 || ip0->protocol == IP_PROTOCOL_UDP
1159 || ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS);
1161 udp0 = (void *) (ip0 + 1);
1162 if (ip0->protocol == IP_PROTOCOL_UDP && udp0->checksum == 0)
1164 p0->flags |= (VNET_BUFFER_F_L4_CHECKSUM_COMPUTED
1165 | VNET_BUFFER_F_L4_CHECKSUM_CORRECT);
1169 sum16 = ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip0, &bogus_length);
1171 p0->flags |= (VNET_BUFFER_F_L4_CHECKSUM_COMPUTED
1172 | ((sum16 == 0) << VNET_BUFFER_F_LOG2_L4_CHECKSUM_CORRECT));
1179 * @brief returns number of links on which src is reachable.
1182 ip6_urpf_loose_check (ip6_main_t * im, vlib_buffer_t * b, ip6_header_t * i)
1184 const load_balance_t *lb0;
1188 fib_index = vec_elt (im->fib_index_by_sw_if_index,
1189 vnet_buffer (b)->sw_if_index[VLIB_RX]);
1191 (vnet_buffer (b)->sw_if_index[VLIB_TX] == (u32) ~ 0) ?
1192 fib_index : vnet_buffer (b)->sw_if_index[VLIB_TX];
1194 lbi = ip6_fib_table_fwding_lookup (fib_index, &i->src_address);
1195 lb0 = load_balance_get (lbi);
1197 return (fib_urpf_check_size (lb0->lb_urpf));
1201 ip6_next_proto_is_tcp_udp (vlib_buffer_t * p0, ip6_header_t * ip0,
1205 proto0 = ip6_locate_header (p0, ip0, IP_PROTOCOL_UDP, udp_offset0);
1206 if (proto0 != IP_PROTOCOL_UDP)
1208 proto0 = ip6_locate_header (p0, ip0, IP_PROTOCOL_TCP, udp_offset0);
1209 proto0 = (proto0 == IP_PROTOCOL_TCP) ? proto0 : 0;
1215 VNET_FEATURE_ARC_INIT (ip6_local) =
1217 .arc_name = "ip6-local",
1218 .start_nodes = VNET_FEATURES ("ip6-local"),
1222 static_always_inline u8
1223 ip6_tcp_udp_icmp_bad_length (vlib_main_t * vm, vlib_buffer_t * p0)
1226 u16 payload_length_host_byte_order;
1227 u32 n_this_buffer, n_bytes_left;
1228 ip6_header_t *ip0 = vlib_buffer_get_current (p0);
1229 u32 headers_size = sizeof (ip0[0]);
1230 u8 *data_this_buffer;
1233 data_this_buffer = (u8 *) (ip0 + 1);
1235 ip6_hop_by_hop_ext_t *ext_hdr = (ip6_hop_by_hop_ext_t *) data_this_buffer;
1237 /* validate really icmp6 next */
1239 if (!(ext_hdr->next_hdr == IP_PROTOCOL_ICMP6)
1240 || (ext_hdr->next_hdr == IP_PROTOCOL_UDP))
1244 payload_length_host_byte_order = clib_net_to_host_u16 (ip0->payload_length);
1245 n_bytes_left = n_this_buffer = payload_length_host_byte_order;
1248 u32 n_ip_bytes_this_buffer =
1249 p0->current_length - (((u8 *) ip0 - p0->data) - p0->current_data);
1250 if (n_this_buffer + headers_size > n_ip_bytes_this_buffer)
1252 n_this_buffer = p0->current_length > headers_size ?
1253 n_ip_bytes_this_buffer - headers_size : 0;
1256 n_bytes_left -= n_this_buffer;
1257 n_bytes_left -= p0->total_length_not_including_first_buffer;
1259 if (n_bytes_left == 0)
1267 ip6_local_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
1268 vlib_frame_t * frame, int head_of_feature_arc)
1270 ip6_main_t *im = &ip6_main;
1271 ip_lookup_main_t *lm = &im->lookup_main;
1272 u32 *from, n_left_from;
1273 vlib_node_runtime_t *error_node =
1274 vlib_node_get_runtime (vm, ip6_input_node.index);
1275 u8 arc_index = vnet_feat_arc_ip6_local.feature_arc_index;
1276 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
1277 u16 nexts[VLIB_FRAME_SIZE], *next;
1279 from = vlib_frame_vector_args (frame);
1280 n_left_from = frame->n_vectors;
1282 if (node->flags & VLIB_NODE_FLAG_TRACE)
1283 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
1285 vlib_get_buffers (vm, from, bufs, n_left_from);
1289 while (n_left_from > 2)
1291 /* Prefetch next iteration. */
1292 if (n_left_from >= 6)
1294 vlib_prefetch_buffer_header (b[4], STORE);
1295 vlib_prefetch_buffer_header (b[5], STORE);
1296 vlib_prefetch_buffer_data (b[2], LOAD);
1297 vlib_prefetch_buffer_data (b[3], LOAD);
1301 error[0] = IP6_ERROR_UNKNOWN_PROTOCOL;
1302 error[1] = IP6_ERROR_UNKNOWN_PROTOCOL;
1304 ip6_header_t *ip[2];
1305 ip[0] = vlib_buffer_get_current (b[0]);
1306 ip[1] = vlib_buffer_get_current (b[1]);
1308 if (head_of_feature_arc)
1310 vnet_buffer (b[0])->l3_hdr_offset = b[0]->current_data;
1311 vnet_buffer (b[1])->l3_hdr_offset = b[1]->current_data;
1314 type[0] = lm->builtin_protocol_by_ip_protocol[ip[0]->protocol];
1315 type[1] = lm->builtin_protocol_by_ip_protocol[ip[1]->protocol];
1318 flags[0] = b[0]->flags;
1319 flags[1] = b[1]->flags;
1321 u32 good_l4_csum[2];
1323 flags[0] & (VNET_BUFFER_F_L4_CHECKSUM_CORRECT |
1324 VNET_BUFFER_F_OFFLOAD_TCP_CKSUM |
1325 VNET_BUFFER_F_OFFLOAD_UDP_CKSUM);
1327 flags[1] & (VNET_BUFFER_F_L4_CHECKSUM_CORRECT |
1328 VNET_BUFFER_F_OFFLOAD_TCP_CKSUM |
1329 VNET_BUFFER_F_OFFLOAD_UDP_CKSUM);
1331 u32 udp_offset[2] = { };
1334 ip6_next_proto_is_tcp_udp (b[0], ip[0], &udp_offset[0]);
1336 ip6_next_proto_is_tcp_udp (b[1], ip[1], &udp_offset[1]);
1337 i16 len_diff[2] = { 0 };
1338 if (PREDICT_TRUE (is_tcp_udp[0]))
1341 (udp_header_t *) ((u8 *) ip[0] + udp_offset[0]);
1342 good_l4_csum[0] |= type[0] == IP_BUILTIN_PROTOCOL_UDP
1343 && udp->checksum == 0;
1344 /* optimistically verify UDP length. */
1345 u16 ip_len, udp_len;
1346 ip_len = clib_net_to_host_u16 (ip[0]->payload_length);
1347 udp_len = clib_net_to_host_u16 (udp->length);
1348 len_diff[0] = ip_len - udp_len;
1350 if (PREDICT_TRUE (is_tcp_udp[1]))
1353 (udp_header_t *) ((u8 *) ip[1] + udp_offset[1]);
1354 good_l4_csum[1] |= type[1] == IP_BUILTIN_PROTOCOL_UDP
1355 && udp->checksum == 0;
1356 /* optimistically verify UDP length. */
1357 u16 ip_len, udp_len;
1358 ip_len = clib_net_to_host_u16 (ip[1]->payload_length);
1359 udp_len = clib_net_to_host_u16 (udp->length);
1360 len_diff[1] = ip_len - udp_len;
1363 good_l4_csum[0] |= type[0] == IP_BUILTIN_PROTOCOL_UNKNOWN;
1364 good_l4_csum[1] |= type[1] == IP_BUILTIN_PROTOCOL_UNKNOWN;
1366 len_diff[0] = type[0] == IP_BUILTIN_PROTOCOL_UDP ? len_diff[0] : 0;
1367 len_diff[1] = type[1] == IP_BUILTIN_PROTOCOL_UDP ? len_diff[1] : 0;
1370 need_csum[0] = type[0] != IP_BUILTIN_PROTOCOL_UNKNOWN
1372 && !(flags[0] & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED);
1373 need_csum[1] = type[1] != IP_BUILTIN_PROTOCOL_UNKNOWN
1375 && !(flags[1] & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED);
1376 if (PREDICT_FALSE (need_csum[0]))
1378 flags[0] = ip6_tcp_udp_icmp_validate_checksum (vm, b[0]);
1379 good_l4_csum[0] = flags[0] & VNET_BUFFER_F_L4_CHECKSUM_CORRECT;
1380 error[0] = IP6_ERROR_UNKNOWN_PROTOCOL;
1384 if (ip6_tcp_udp_icmp_bad_length (vm, b[0]))
1385 error[0] = IP6_ERROR_BAD_LENGTH;
1387 if (PREDICT_FALSE (need_csum[1]))
1389 flags[1] = ip6_tcp_udp_icmp_validate_checksum (vm, b[1]);
1390 good_l4_csum[1] = flags[1] & VNET_BUFFER_F_L4_CHECKSUM_CORRECT;
1391 error[1] = IP6_ERROR_UNKNOWN_PROTOCOL;
1395 if (ip6_tcp_udp_icmp_bad_length (vm, b[1]))
1396 error[1] = IP6_ERROR_BAD_LENGTH;
1400 error[0] = len_diff[0] < 0 ? IP6_ERROR_UDP_LENGTH : error[0];
1402 error[1] = len_diff[1] < 0 ? IP6_ERROR_UDP_LENGTH : error[1];
1404 STATIC_ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_UDP ==
1405 IP6_ERROR_UDP_CHECKSUM,
1406 "Wrong IP6 errors constants");
1407 STATIC_ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_ICMP ==
1408 IP6_ERROR_ICMP_CHECKSUM,
1409 "Wrong IP6 errors constants");
1412 !good_l4_csum[0] ? IP6_ERROR_UDP_CHECKSUM + type[0] : error[0];
1414 !good_l4_csum[1] ? IP6_ERROR_UDP_CHECKSUM + type[1] : error[1];
1416 /* Drop packets from unroutable hosts. */
1417 /* If this is a neighbor solicitation (ICMP), skip source RPF check */
1419 unroutable[0] = error[0] == IP6_ERROR_UNKNOWN_PROTOCOL
1420 && type[0] != IP_BUILTIN_PROTOCOL_ICMP
1421 && !ip6_address_is_link_local_unicast (&ip[0]->src_address);
1422 unroutable[1] = error[1] == IP6_ERROR_UNKNOWN_PROTOCOL
1423 && type[1] != IP_BUILTIN_PROTOCOL_ICMP
1424 && !ip6_address_is_link_local_unicast (&ip[1]->src_address);
1425 if (PREDICT_FALSE (unroutable[0]))
1428 !ip6_urpf_loose_check (im, b[0],
1429 ip[0]) ? IP6_ERROR_SRC_LOOKUP_MISS
1432 if (PREDICT_FALSE (unroutable[1]))
1435 !ip6_urpf_loose_check (im, b[1],
1436 ip[1]) ? IP6_ERROR_SRC_LOOKUP_MISS
1440 vnet_buffer (b[0])->ip.fib_index =
1441 vnet_buffer (b[0])->sw_if_index[VLIB_TX] != ~0 ?
1442 vnet_buffer (b[0])->sw_if_index[VLIB_TX] :
1443 vnet_buffer (b[0])->ip.fib_index;
1444 vnet_buffer (b[1])->ip.fib_index =
1445 vnet_buffer (b[1])->sw_if_index[VLIB_TX] != ~0 ?
1446 vnet_buffer (b[1])->sw_if_index[VLIB_TX] :
1447 vnet_buffer (b[1])->ip.fib_index;
1448 } /* head_of_feature_arc */
1450 next[0] = lm->local_next_by_ip_protocol[ip[0]->protocol];
1452 error[0] != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next[0];
1453 next[1] = lm->local_next_by_ip_protocol[ip[1]->protocol];
1455 error[1] != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next[1];
1457 b[0]->error = error_node->errors[0];
1458 b[1]->error = error_node->errors[1];
1460 if (head_of_feature_arc)
1463 ip6_unknown[0] = error[0] == (u8) IP6_ERROR_UNKNOWN_PROTOCOL;
1464 ip6_unknown[1] = error[1] == (u8) IP6_ERROR_UNKNOWN_PROTOCOL;
1465 if (PREDICT_TRUE (ip6_unknown[0]))
1467 u32 next32 = next[0];
1468 vnet_feature_arc_start (arc_index,
1469 vnet_buffer (b[0])->sw_if_index
1470 [VLIB_RX], &next32, b[0]);
1473 if (PREDICT_TRUE (ip6_unknown[1]))
1475 u32 next32 = next[1];
1476 vnet_feature_arc_start (arc_index,
1477 vnet_buffer (b[1])->sw_if_index
1478 [VLIB_RX], &next32, b[1]);
1492 error = IP6_ERROR_UNKNOWN_PROTOCOL;
1495 ip = vlib_buffer_get_current (b[0]);
1497 if (head_of_feature_arc)
1499 vnet_buffer (b[0])->l3_hdr_offset = b[0]->current_data;
1500 u8 type = lm->builtin_protocol_by_ip_protocol[ip->protocol];
1502 u32 flags = b[0]->flags;
1504 flags & (VNET_BUFFER_F_L4_CHECKSUM_CORRECT |
1505 VNET_BUFFER_F_OFFLOAD_TCP_CKSUM |
1506 VNET_BUFFER_F_OFFLOAD_UDP_CKSUM);
1510 u8 is_tcp_udp = ip6_next_proto_is_tcp_udp (b[0], ip, &udp_offset);
1511 if (PREDICT_TRUE (is_tcp_udp))
1513 udp_header_t *udp = (udp_header_t *) ((u8 *) ip + udp_offset);
1514 /* Don't verify UDP checksum for packets with explicit zero checksum. */
1515 good_l4_csum |= type == IP_BUILTIN_PROTOCOL_UDP
1516 && udp->checksum == 0;
1517 /* optimistically verify UDP length. */
1518 u16 ip_len, udp_len;
1519 ip_len = clib_net_to_host_u16 (ip->payload_length);
1520 udp_len = clib_net_to_host_u16 (udp->length);
1521 len_diff = ip_len - udp_len;
1524 good_l4_csum |= type == IP_BUILTIN_PROTOCOL_UNKNOWN;
1525 len_diff = type == IP_BUILTIN_PROTOCOL_UDP ? len_diff : 0;
1527 u8 need_csum = type != IP_BUILTIN_PROTOCOL_UNKNOWN && !good_l4_csum
1528 && !(flags & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED);
1529 if (PREDICT_FALSE (need_csum))
1531 flags = ip6_tcp_udp_icmp_validate_checksum (vm, b[0]);
1532 good_l4_csum = flags & VNET_BUFFER_F_L4_CHECKSUM_CORRECT;
1533 error = IP6_ERROR_UNKNOWN_PROTOCOL;
1537 if (ip6_tcp_udp_icmp_bad_length (vm, b[0]))
1538 error = IP6_ERROR_BAD_LENGTH;
1543 error = len_diff < 0 ? IP6_ERROR_UDP_LENGTH : error;
1545 STATIC_ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_UDP ==
1546 IP6_ERROR_UDP_CHECKSUM,
1547 "Wrong IP6 errors constants");
1548 STATIC_ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_ICMP ==
1549 IP6_ERROR_ICMP_CHECKSUM,
1550 "Wrong IP6 errors constants");
1552 error = !good_l4_csum ? IP6_ERROR_UDP_CHECKSUM + type : error;
1554 /* Drop packets from unroutable hosts. */
1555 /* If this is a neighbor solicitation (ICMP), skip source RPF check */
1556 u8 unroutable = error == IP6_ERROR_UNKNOWN_PROTOCOL
1557 && type != IP_BUILTIN_PROTOCOL_ICMP
1558 && !ip6_address_is_link_local_unicast (&ip->src_address);
1559 if (PREDICT_FALSE (unroutable))
1562 !ip6_urpf_loose_check (im, b[0],
1563 ip) ? IP6_ERROR_SRC_LOOKUP_MISS :
1567 vnet_buffer (b[0])->ip.fib_index =
1568 vnet_buffer (b[0])->sw_if_index[VLIB_TX] != ~0 ?
1569 vnet_buffer (b[0])->sw_if_index[VLIB_TX] :
1570 vnet_buffer (b[0])->ip.fib_index;
1571 } /* head_of_feature_arc */
1573 next[0] = lm->local_next_by_ip_protocol[ip->protocol];
1575 error != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next[0];
1577 b[0]->error = error_node->errors[0];
1579 if (head_of_feature_arc)
1581 if (PREDICT_TRUE (error == (u8) IP6_ERROR_UNKNOWN_PROTOCOL))
1583 u32 next32 = next[0];
1584 vnet_feature_arc_start (arc_index,
1585 vnet_buffer (b[0])->sw_if_index
1586 [VLIB_RX], &next32, b[0]);
1597 vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors);
1598 return frame->n_vectors;
1601 VLIB_NODE_FN (ip6_local_node) (vlib_main_t * vm, vlib_node_runtime_t * node,
1602 vlib_frame_t * frame)
1604 return ip6_local_inline (vm, node, frame, 1 /* head of feature arc */ );
1608 VLIB_REGISTER_NODE (ip6_local_node) =
1610 .name = "ip6-local",
1611 .vector_size = sizeof (u32),
1612 .format_trace = format_ip6_forward_next_trace,
1613 .n_next_nodes = IP_LOCAL_N_NEXT,
1616 [IP_LOCAL_NEXT_DROP] = "ip6-drop",
1617 [IP_LOCAL_NEXT_PUNT] = "ip6-punt",
1618 [IP_LOCAL_NEXT_UDP_LOOKUP] = "ip6-udp-lookup",
1619 [IP_LOCAL_NEXT_ICMP] = "ip6-icmp-input",
1620 [IP_LOCAL_NEXT_REASSEMBLY] = "ip6-full-reassembly",
1625 VLIB_NODE_FN (ip6_local_end_of_arc_node) (vlib_main_t * vm,
1626 vlib_node_runtime_t * node,
1627 vlib_frame_t * frame)
1629 return ip6_local_inline (vm, node, frame, 0 /* head of feature arc */ );
1633 VLIB_REGISTER_NODE (ip6_local_end_of_arc_node) = {
1634 .name = "ip6-local-end-of-arc",
1635 .vector_size = sizeof (u32),
1637 .format_trace = format_ip6_forward_next_trace,
1638 .sibling_of = "ip6-local",
1641 VNET_FEATURE_INIT (ip6_local_end_of_arc, static) = {
1642 .arc_name = "ip6-local",
1643 .node_name = "ip6-local-end-of-arc",
1644 .runs_before = 0, /* not before any other features */
1648 #ifdef CLIB_MARCH_VARIANT
1649 extern vlib_node_registration_t ip6_local_node;
1652 ip6_register_protocol (u32 protocol, u32 node_index)
1654 vlib_main_t *vm = vlib_get_main ();
1655 ip6_main_t *im = &ip6_main;
1656 ip_lookup_main_t *lm = &im->lookup_main;
1658 ASSERT (protocol < ARRAY_LEN (lm->local_next_by_ip_protocol));
1659 lm->local_next_by_ip_protocol[protocol] =
1660 vlib_node_add_next (vm, ip6_local_node.index, node_index);
1664 ip6_unregister_protocol (u32 protocol)
1666 ip6_main_t *im = &ip6_main;
1667 ip_lookup_main_t *lm = &im->lookup_main;
1669 ASSERT (protocol < ARRAY_LEN (lm->local_next_by_ip_protocol));
1670 lm->local_next_by_ip_protocol[protocol] = IP_LOCAL_NEXT_PUNT;
1676 IP6_REWRITE_NEXT_DROP,
1677 IP6_REWRITE_NEXT_ICMP_ERROR,
1678 IP6_REWRITE_NEXT_FRAGMENT,
1679 IP6_REWRITE_N_NEXT /* Last */
1680 } ip6_rewrite_next_t;
1683 * This bits of an IPv6 address to mask to construct a multicast
1686 #define IP6_MCAST_ADDR_MASK 0xffffffff
1689 ip6_mtu_check (vlib_buffer_t * b, u16 packet_bytes,
1690 u16 adj_packet_bytes, bool is_locally_generated,
1691 u32 * next, u8 is_midchain, u32 * error)
1693 if (adj_packet_bytes >= 1280 && packet_bytes > adj_packet_bytes)
1695 if (is_locally_generated)
1697 /* IP fragmentation */
1698 ip_frag_set_vnet_buffer (b, adj_packet_bytes,
1700 IP_FRAG_NEXT_IP_REWRITE_MIDCHAIN :
1701 IP_FRAG_NEXT_IP_REWRITE), 0);
1702 *next = IP6_REWRITE_NEXT_FRAGMENT;
1703 *error = IP6_ERROR_MTU_EXCEEDED;
1707 *error = IP6_ERROR_MTU_EXCEEDED;
1708 icmp6_error_set_vnet_buffer (b, ICMP6_packet_too_big, 0,
1710 *next = IP6_REWRITE_NEXT_ICMP_ERROR;
1716 ip6_rewrite_inline_with_gso (vlib_main_t * vm,
1717 vlib_node_runtime_t * node,
1718 vlib_frame_t * frame,
1719 int do_counters, int is_midchain, int is_mcast)
1721 ip_lookup_main_t *lm = &ip6_main.lookup_main;
1722 u32 *from = vlib_frame_vector_args (frame);
1723 u32 n_left_from, n_left_to_next, *to_next, next_index;
1724 vlib_node_runtime_t *error_node =
1725 vlib_node_get_runtime (vm, ip6_input_node.index);
1727 n_left_from = frame->n_vectors;
1728 next_index = node->cached_next_index;
1729 u32 thread_index = vm->thread_index;
1731 while (n_left_from > 0)
1733 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1735 while (n_left_from >= 4 && n_left_to_next >= 2)
1737 const ip_adjacency_t *adj0, *adj1;
1738 vlib_buffer_t *p0, *p1;
1739 ip6_header_t *ip0, *ip1;
1740 u32 pi0, rw_len0, next0, error0, adj_index0;
1741 u32 pi1, rw_len1, next1, error1, adj_index1;
1742 u32 tx_sw_if_index0, tx_sw_if_index1;
1743 bool is_locally_originated0, is_locally_originated1;
1745 /* Prefetch next iteration. */
1747 vlib_buffer_t *p2, *p3;
1749 p2 = vlib_get_buffer (vm, from[2]);
1750 p3 = vlib_get_buffer (vm, from[3]);
1752 vlib_prefetch_buffer_header (p2, LOAD);
1753 vlib_prefetch_buffer_header (p3, LOAD);
1755 CLIB_PREFETCH (p2->pre_data, 32, STORE);
1756 CLIB_PREFETCH (p3->pre_data, 32, STORE);
1758 CLIB_PREFETCH (p2->data, sizeof (ip0[0]), STORE);
1759 CLIB_PREFETCH (p3->data, sizeof (ip0[0]), STORE);
1762 pi0 = to_next[0] = from[0];
1763 pi1 = to_next[1] = from[1];
1768 n_left_to_next -= 2;
1770 p0 = vlib_get_buffer (vm, pi0);
1771 p1 = vlib_get_buffer (vm, pi1);
1773 adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
1774 adj_index1 = vnet_buffer (p1)->ip.adj_index[VLIB_TX];
1776 ip0 = vlib_buffer_get_current (p0);
1777 ip1 = vlib_buffer_get_current (p1);
1779 error0 = error1 = IP6_ERROR_NONE;
1780 next0 = next1 = IP6_REWRITE_NEXT_DROP;
1782 is_locally_originated0 =
1783 p0->flags & VNET_BUFFER_F_LOCALLY_ORIGINATED;
1784 if (PREDICT_TRUE (!is_locally_originated0))
1786 i32 hop_limit0 = ip0->hop_limit;
1788 /* Input node should have reject packets with hop limit 0. */
1789 ASSERT (ip0->hop_limit > 0);
1793 ip0->hop_limit = hop_limit0;
1796 * If the hop count drops below 1 when forwarding, generate
1799 if (PREDICT_FALSE (hop_limit0 <= 0))
1801 error0 = IP6_ERROR_TIME_EXPIRED;
1802 next0 = IP6_REWRITE_NEXT_ICMP_ERROR;
1803 vnet_buffer (p0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
1804 icmp6_error_set_vnet_buffer (p0, ICMP6_time_exceeded,
1805 ICMP6_time_exceeded_ttl_exceeded_in_transit,
1810 is_locally_originated1 =
1811 p1->flags & VNET_BUFFER_F_LOCALLY_ORIGINATED;
1812 if (PREDICT_TRUE (!is_locally_originated1))
1814 i32 hop_limit1 = ip1->hop_limit;
1816 /* Input node should have reject packets with hop limit 0. */
1817 ASSERT (ip1->hop_limit > 0);
1821 ip1->hop_limit = hop_limit1;
1824 * If the hop count drops below 1 when forwarding, generate
1827 if (PREDICT_FALSE (hop_limit1 <= 0))
1829 error1 = IP6_ERROR_TIME_EXPIRED;
1830 next1 = IP6_REWRITE_NEXT_ICMP_ERROR;
1831 vnet_buffer (p1)->sw_if_index[VLIB_TX] = (u32) ~ 0;
1832 icmp6_error_set_vnet_buffer (p1, ICMP6_time_exceeded,
1833 ICMP6_time_exceeded_ttl_exceeded_in_transit,
1838 adj0 = adj_get (adj_index0);
1839 adj1 = adj_get (adj_index1);
1841 rw_len0 = adj0[0].rewrite_header.data_bytes;
1842 rw_len1 = adj1[0].rewrite_header.data_bytes;
1843 vnet_buffer (p0)->ip.save_rewrite_length = rw_len0;
1844 vnet_buffer (p1)->ip.save_rewrite_length = rw_len1;
1848 vlib_increment_combined_counter
1849 (&adjacency_counters,
1850 thread_index, adj_index0, 1,
1851 vlib_buffer_length_in_chain (vm, p0) + rw_len0);
1852 vlib_increment_combined_counter
1853 (&adjacency_counters,
1854 thread_index, adj_index1, 1,
1855 vlib_buffer_length_in_chain (vm, p1) + rw_len1);
1858 /* Check MTU of outgoing interface. */
1860 clib_net_to_host_u16 (ip0->payload_length) +
1861 sizeof (ip6_header_t);
1863 clib_net_to_host_u16 (ip1->payload_length) +
1864 sizeof (ip6_header_t);
1865 if (p0->flags & VNET_BUFFER_F_GSO)
1866 ip0_len = gso_mtu_sz (p0);
1867 if (p1->flags & VNET_BUFFER_F_GSO)
1868 ip1_len = gso_mtu_sz (p1);
1872 ip6_mtu_check (p0, ip0_len,
1873 adj0[0].rewrite_header.max_l3_packet_bytes,
1874 is_locally_originated0, &next0, is_midchain,
1876 ip6_mtu_check (p1, ip1_len,
1877 adj1[0].rewrite_header.max_l3_packet_bytes,
1878 is_locally_originated1, &next1, is_midchain,
1881 /* Don't adjust the buffer for hop count issue; icmp-error node
1882 * wants to see the IP header */
1883 if (PREDICT_TRUE (error0 == IP6_ERROR_NONE))
1885 p0->current_data -= rw_len0;
1886 p0->current_length += rw_len0;
1888 tx_sw_if_index0 = adj0[0].rewrite_header.sw_if_index;
1889 vnet_buffer (p0)->sw_if_index[VLIB_TX] = tx_sw_if_index0;
1890 next0 = adj0[0].rewrite_header.next_index;
1893 (adj0[0].rewrite_header.flags & VNET_REWRITE_HAS_FEATURES))
1894 vnet_feature_arc_start (lm->output_feature_arc_index,
1895 tx_sw_if_index0, &next0, p0);
1899 p0->error = error_node->errors[error0];
1901 if (PREDICT_TRUE (error1 == IP6_ERROR_NONE))
1903 p1->current_data -= rw_len1;
1904 p1->current_length += rw_len1;
1906 tx_sw_if_index1 = adj1[0].rewrite_header.sw_if_index;
1907 vnet_buffer (p1)->sw_if_index[VLIB_TX] = tx_sw_if_index1;
1908 next1 = adj1[0].rewrite_header.next_index;
1911 (adj1[0].rewrite_header.flags & VNET_REWRITE_HAS_FEATURES))
1912 vnet_feature_arc_start (lm->output_feature_arc_index,
1913 tx_sw_if_index1, &next1, p1);
1917 p1->error = error_node->errors[error1];
1922 /* before we paint on the next header, update the L4
1923 * checksums if required, since there's no offload on a tunnel */
1924 vnet_calc_checksums_inline (vm, p0, 0 /* is_ip4 */ ,
1927 vnet_calc_checksums_inline (vm, p1, 0 /* is_ip4 */ ,
1932 /* Guess we are only writing on simple Ethernet header. */
1933 vnet_rewrite_two_headers (adj0[0], adj1[0],
1934 ip0, ip1, sizeof (ethernet_header_t));
1938 if (adj0->sub_type.midchain.fixup_func)
1939 adj0->sub_type.midchain.fixup_func
1940 (vm, adj0, p0, adj0->sub_type.midchain.fixup_data);
1941 if (adj1->sub_type.midchain.fixup_func)
1942 adj1->sub_type.midchain.fixup_func
1943 (vm, adj1, p1, adj1->sub_type.midchain.fixup_data);
1948 * copy bytes from the IP address into the MAC rewrite
1950 vnet_ip_mcast_fixup_header (IP6_MCAST_ADDR_MASK,
1952 rewrite_header.dst_mcast_offset,
1953 &ip0->dst_address.as_u32[3],
1955 vnet_ip_mcast_fixup_header (IP6_MCAST_ADDR_MASK,
1957 rewrite_header.dst_mcast_offset,
1958 &ip1->dst_address.as_u32[3],
1962 vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
1963 to_next, n_left_to_next,
1964 pi0, pi1, next0, next1);
1967 while (n_left_from > 0 && n_left_to_next > 0)
1969 ip_adjacency_t *adj0;
1973 u32 adj_index0, next0, error0;
1974 u32 tx_sw_if_index0;
1975 bool is_locally_originated0;
1977 pi0 = to_next[0] = from[0];
1979 p0 = vlib_get_buffer (vm, pi0);
1981 adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
1983 adj0 = adj_get (adj_index0);
1985 ip0 = vlib_buffer_get_current (p0);
1987 error0 = IP6_ERROR_NONE;
1988 next0 = IP6_REWRITE_NEXT_DROP;
1990 /* Check hop limit */
1991 is_locally_originated0 =
1992 p0->flags & VNET_BUFFER_F_LOCALLY_ORIGINATED;
1993 if (PREDICT_TRUE (!is_locally_originated0))
1995 i32 hop_limit0 = ip0->hop_limit;
1997 ASSERT (ip0->hop_limit > 0);
2001 ip0->hop_limit = hop_limit0;
2003 if (PREDICT_FALSE (hop_limit0 <= 0))
2006 * If the hop count drops below 1 when forwarding, generate
2009 error0 = IP6_ERROR_TIME_EXPIRED;
2010 next0 = IP6_REWRITE_NEXT_ICMP_ERROR;
2011 vnet_buffer (p0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
2012 icmp6_error_set_vnet_buffer (p0, ICMP6_time_exceeded,
2013 ICMP6_time_exceeded_ttl_exceeded_in_transit,
2020 vnet_calc_checksums_inline (vm, p0, 0 /* is_ip4 */ ,
2025 /* Guess we are only writing on simple Ethernet header. */
2026 vnet_rewrite_one_header (adj0[0], ip0, sizeof (ethernet_header_t));
2028 /* Update packet buffer attributes/set output interface. */
2029 rw_len0 = adj0[0].rewrite_header.data_bytes;
2030 vnet_buffer (p0)->ip.save_rewrite_length = rw_len0;
2034 vlib_increment_combined_counter
2035 (&adjacency_counters,
2036 thread_index, adj_index0, 1,
2037 vlib_buffer_length_in_chain (vm, p0) + rw_len0);
2040 /* Check MTU of outgoing interface. */
2042 clib_net_to_host_u16 (ip0->payload_length) +
2043 sizeof (ip6_header_t);
2044 if (p0->flags & VNET_BUFFER_F_GSO)
2045 ip0_len = gso_mtu_sz (p0);
2047 ip6_mtu_check (p0, ip0_len,
2048 adj0[0].rewrite_header.max_l3_packet_bytes,
2049 is_locally_originated0, &next0, is_midchain,
2052 /* Don't adjust the buffer for hop count issue; icmp-error node
2053 * wants to see the IP header */
2054 if (PREDICT_TRUE (error0 == IP6_ERROR_NONE))
2056 p0->current_data -= rw_len0;
2057 p0->current_length += rw_len0;
2059 tx_sw_if_index0 = adj0[0].rewrite_header.sw_if_index;
2061 vnet_buffer (p0)->sw_if_index[VLIB_TX] = tx_sw_if_index0;
2062 next0 = adj0[0].rewrite_header.next_index;
2065 (adj0[0].rewrite_header.flags & VNET_REWRITE_HAS_FEATURES))
2066 vnet_feature_arc_start (lm->output_feature_arc_index,
2067 tx_sw_if_index0, &next0, p0);
2071 p0->error = error_node->errors[error0];
2076 if (adj0->sub_type.midchain.fixup_func)
2077 adj0->sub_type.midchain.fixup_func
2078 (vm, adj0, p0, adj0->sub_type.midchain.fixup_data);
2082 vnet_ip_mcast_fixup_header (IP6_MCAST_ADDR_MASK,
2084 rewrite_header.dst_mcast_offset,
2085 &ip0->dst_address.as_u32[3],
2092 n_left_to_next -= 1;
2094 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
2095 to_next, n_left_to_next,
2099 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2102 /* Need to do trace after rewrites to pick up new packet data. */
2103 if (node->flags & VLIB_NODE_FLAG_TRACE)
2104 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
2106 return frame->n_vectors;
2110 ip6_rewrite_inline (vlib_main_t * vm,
2111 vlib_node_runtime_t * node,
2112 vlib_frame_t * frame,
2113 int do_counters, int is_midchain, int is_mcast)
2115 return ip6_rewrite_inline_with_gso (vm, node, frame, do_counters,
2116 is_midchain, is_mcast);
2119 VLIB_NODE_FN (ip6_rewrite_node) (vlib_main_t * vm,
2120 vlib_node_runtime_t * node,
2121 vlib_frame_t * frame)
2123 if (adj_are_counters_enabled ())
2124 return ip6_rewrite_inline (vm, node, frame, 1, 0, 0);
2126 return ip6_rewrite_inline (vm, node, frame, 0, 0, 0);
2129 VLIB_NODE_FN (ip6_rewrite_bcast_node) (vlib_main_t * vm,
2130 vlib_node_runtime_t * node,
2131 vlib_frame_t * frame)
2133 if (adj_are_counters_enabled ())
2134 return ip6_rewrite_inline (vm, node, frame, 1, 0, 0);
2136 return ip6_rewrite_inline (vm, node, frame, 0, 0, 0);
2139 VLIB_NODE_FN (ip6_rewrite_mcast_node) (vlib_main_t * vm,
2140 vlib_node_runtime_t * node,
2141 vlib_frame_t * frame)
2143 if (adj_are_counters_enabled ())
2144 return ip6_rewrite_inline (vm, node, frame, 1, 0, 1);
2146 return ip6_rewrite_inline (vm, node, frame, 0, 0, 1);
2149 VLIB_NODE_FN (ip6_midchain_node) (vlib_main_t * vm,
2150 vlib_node_runtime_t * node,
2151 vlib_frame_t * frame)
2153 if (adj_are_counters_enabled ())
2154 return ip6_rewrite_inline (vm, node, frame, 1, 1, 0);
2156 return ip6_rewrite_inline (vm, node, frame, 0, 1, 0);
2159 VLIB_NODE_FN (ip6_mcast_midchain_node) (vlib_main_t * vm,
2160 vlib_node_runtime_t * node,
2161 vlib_frame_t * frame)
2163 if (adj_are_counters_enabled ())
2164 return ip6_rewrite_inline (vm, node, frame, 1, 1, 1);
2166 return ip6_rewrite_inline (vm, node, frame, 0, 1, 1);
2170 VLIB_REGISTER_NODE (ip6_midchain_node) =
2172 .name = "ip6-midchain",
2173 .vector_size = sizeof (u32),
2174 .format_trace = format_ip6_forward_next_trace,
2175 .sibling_of = "ip6-rewrite",
2178 VLIB_REGISTER_NODE (ip6_rewrite_node) =
2180 .name = "ip6-rewrite",
2181 .vector_size = sizeof (u32),
2182 .format_trace = format_ip6_rewrite_trace,
2183 .n_next_nodes = IP6_REWRITE_N_NEXT,
2186 [IP6_REWRITE_NEXT_DROP] = "ip6-drop",
2187 [IP6_REWRITE_NEXT_ICMP_ERROR] = "ip6-icmp-error",
2188 [IP6_REWRITE_NEXT_FRAGMENT] = "ip6-frag",
2192 VLIB_REGISTER_NODE (ip6_rewrite_bcast_node) = {
2193 .name = "ip6-rewrite-bcast",
2194 .vector_size = sizeof (u32),
2196 .format_trace = format_ip6_rewrite_trace,
2197 .sibling_of = "ip6-rewrite",
2200 VLIB_REGISTER_NODE (ip6_rewrite_mcast_node) =
2202 .name = "ip6-rewrite-mcast",
2203 .vector_size = sizeof (u32),
2204 .format_trace = format_ip6_rewrite_trace,
2205 .sibling_of = "ip6-rewrite",
2209 VLIB_REGISTER_NODE (ip6_mcast_midchain_node) =
2211 .name = "ip6-mcast-midchain",
2212 .vector_size = sizeof (u32),
2213 .format_trace = format_ip6_rewrite_trace,
2214 .sibling_of = "ip6-rewrite",
2220 * Hop-by-Hop handling
2222 #ifndef CLIB_MARCH_VARIANT
2223 ip6_hop_by_hop_main_t ip6_hop_by_hop_main;
2224 #endif /* CLIB_MARCH_VARIANT */
2226 #define foreach_ip6_hop_by_hop_error \
2227 _(PROCESSED, "pkts with ip6 hop-by-hop options") \
2228 _(FORMAT, "incorrectly formatted hop-by-hop options") \
2229 _(UNKNOWN_OPTION, "unknown ip6 hop-by-hop options")
2234 #define _(sym,str) IP6_HOP_BY_HOP_ERROR_##sym,
2235 foreach_ip6_hop_by_hop_error
2237 IP6_HOP_BY_HOP_N_ERROR,
2238 } ip6_hop_by_hop_error_t;
2242 * Primary h-b-h handler trace support
2243 * We work pretty hard on the problem for obvious reasons
2249 u8 option_data[256];
2250 } ip6_hop_by_hop_trace_t;
2252 extern vlib_node_registration_t ip6_hop_by_hop_node;
2254 static char *ip6_hop_by_hop_error_strings[] = {
2255 #define _(sym,string) string,
2256 foreach_ip6_hop_by_hop_error
2260 #ifndef CLIB_MARCH_VARIANT
2262 format_ip6_hop_by_hop_ext_hdr (u8 * s, va_list * args)
2264 ip6_hop_by_hop_header_t *hbh0 = va_arg (*args, ip6_hop_by_hop_header_t *);
2265 int total_len = va_arg (*args, int);
2266 ip6_hop_by_hop_option_t *opt0, *limit0;
2267 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2270 s = format (s, "IP6_HOP_BY_HOP: next protocol %d len %d total %d",
2271 hbh0->protocol, (hbh0->length + 1) << 3, total_len);
2273 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2274 limit0 = (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 + total_len);
2276 while (opt0 < limit0)
2281 case 0: /* Pad, just stop */
2282 opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0 + 1);
2286 if (hm->trace[type0])
2288 s = (*hm->trace[type0]) (s, opt0);
2293 format (s, "\n unrecognized option %d length %d", type0,
2297 (ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length +
2298 sizeof (ip6_hop_by_hop_option_t));
2307 format_ip6_hop_by_hop_trace (u8 * s, va_list * args)
2309 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
2310 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
2311 ip6_hop_by_hop_trace_t *t = va_arg (*args, ip6_hop_by_hop_trace_t *);
2312 ip6_hop_by_hop_header_t *hbh0;
2313 ip6_hop_by_hop_option_t *opt0, *limit0;
2314 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2318 hbh0 = (ip6_hop_by_hop_header_t *) t->option_data;
2320 s = format (s, "IP6_HOP_BY_HOP: next index %d len %d traced %d",
2321 t->next_index, (hbh0->length + 1) << 3, t->trace_len);
2323 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2324 limit0 = (ip6_hop_by_hop_option_t *) ((u8 *) hbh0) + t->trace_len;
2326 while (opt0 < limit0)
2331 case 0: /* Pad, just stop */
2332 opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0) + 1;
2336 if (hm->trace[type0])
2338 s = (*hm->trace[type0]) (s, opt0);
2343 format (s, "\n unrecognized option %d length %d", type0,
2347 (ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length +
2348 sizeof (ip6_hop_by_hop_option_t));
2356 ip6_scan_hbh_options (vlib_buffer_t * b0,
2358 ip6_hop_by_hop_header_t * hbh0,
2359 ip6_hop_by_hop_option_t * opt0,
2360 ip6_hop_by_hop_option_t * limit0, u32 * next0)
2362 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2366 while (opt0 < limit0)
2372 opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0) + 1;
2377 if (hm->options[type0])
2379 if ((*hm->options[type0]) (b0, ip0, opt0) < 0)
2381 error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2387 /* Unrecognized mandatory option, check the two high order bits */
2388 switch (opt0->type & HBH_OPTION_TYPE_HIGH_ORDER_BITS)
2390 case HBH_OPTION_TYPE_SKIP_UNKNOWN:
2392 case HBH_OPTION_TYPE_DISCARD_UNKNOWN:
2393 error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2394 *next0 = IP_LOOKUP_NEXT_DROP;
2396 case HBH_OPTION_TYPE_DISCARD_UNKNOWN_ICMP:
2397 error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2398 *next0 = IP_LOOKUP_NEXT_ICMP_ERROR;
2399 icmp6_error_set_vnet_buffer (b0, ICMP6_parameter_problem,
2400 ICMP6_parameter_problem_unrecognized_option,
2401 (u8 *) opt0 - (u8 *) ip0);
2403 case HBH_OPTION_TYPE_DISCARD_UNKNOWN_ICMP_NOT_MCAST:
2404 error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2405 if (!ip6_address_is_multicast (&ip0->dst_address))
2407 *next0 = IP_LOOKUP_NEXT_ICMP_ERROR;
2408 icmp6_error_set_vnet_buffer (b0,
2409 ICMP6_parameter_problem,
2410 ICMP6_parameter_problem_unrecognized_option,
2411 (u8 *) opt0 - (u8 *) ip0);
2415 *next0 = IP_LOOKUP_NEXT_DROP;
2423 (ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length +
2424 sizeof (ip6_hop_by_hop_option_t));
2430 * Process the Hop-by-Hop Options header
2432 VLIB_NODE_FN (ip6_hop_by_hop_node) (vlib_main_t * vm,
2433 vlib_node_runtime_t * node,
2434 vlib_frame_t * frame)
2436 vlib_node_runtime_t *error_node =
2437 vlib_node_get_runtime (vm, ip6_hop_by_hop_node.index);
2438 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2439 u32 n_left_from, *from, *to_next;
2440 ip_lookup_next_t next_index;
2442 from = vlib_frame_vector_args (frame);
2443 n_left_from = frame->n_vectors;
2444 next_index = node->cached_next_index;
2446 while (n_left_from > 0)
2450 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
2452 while (n_left_from >= 4 && n_left_to_next >= 2)
2455 vlib_buffer_t *b0, *b1;
2457 ip6_header_t *ip0, *ip1;
2458 ip6_hop_by_hop_header_t *hbh0, *hbh1;
2459 ip6_hop_by_hop_option_t *opt0, *limit0, *opt1, *limit1;
2460 u8 error0 = 0, error1 = 0;
2462 /* Prefetch next iteration. */
2464 vlib_buffer_t *p2, *p3;
2466 p2 = vlib_get_buffer (vm, from[2]);
2467 p3 = vlib_get_buffer (vm, from[3]);
2469 vlib_prefetch_buffer_header (p2, LOAD);
2470 vlib_prefetch_buffer_header (p3, LOAD);
2472 CLIB_PREFETCH (p2->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
2473 CLIB_PREFETCH (p3->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
2476 /* Speculatively enqueue b0, b1 to the current next frame */
2477 to_next[0] = bi0 = from[0];
2478 to_next[1] = bi1 = from[1];
2482 n_left_to_next -= 2;
2484 b0 = vlib_get_buffer (vm, bi0);
2485 b1 = vlib_get_buffer (vm, bi1);
2487 /* Default use the next_index from the adjacency. A HBH option rarely redirects to a different node */
2488 u32 adj_index0 = vnet_buffer (b0)->ip.adj_index[VLIB_TX];
2489 ip_adjacency_t *adj0 = adj_get (adj_index0);
2490 u32 adj_index1 = vnet_buffer (b1)->ip.adj_index[VLIB_TX];
2491 ip_adjacency_t *adj1 = adj_get (adj_index1);
2493 /* Default use the next_index from the adjacency. A HBH option rarely redirects to a different node */
2494 next0 = adj0->lookup_next_index;
2495 next1 = adj1->lookup_next_index;
2497 ip0 = vlib_buffer_get_current (b0);
2498 ip1 = vlib_buffer_get_current (b1);
2499 hbh0 = (ip6_hop_by_hop_header_t *) (ip0 + 1);
2500 hbh1 = (ip6_hop_by_hop_header_t *) (ip1 + 1);
2501 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2502 opt1 = (ip6_hop_by_hop_option_t *) (hbh1 + 1);
2504 (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 +
2505 ((hbh0->length + 1) << 3));
2507 (ip6_hop_by_hop_option_t *) ((u8 *) hbh1 +
2508 ((hbh1->length + 1) << 3));
2511 * Basic validity checks
2513 if ((hbh0->length + 1) << 3 >
2514 clib_net_to_host_u16 (ip0->payload_length))
2516 error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2517 next0 = IP_LOOKUP_NEXT_DROP;
2520 /* Scan the set of h-b-h options, process ones that we understand */
2521 error0 = ip6_scan_hbh_options (b0, ip0, hbh0, opt0, limit0, &next0);
2523 if ((hbh1->length + 1) << 3 >
2524 clib_net_to_host_u16 (ip1->payload_length))
2526 error1 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2527 next1 = IP_LOOKUP_NEXT_DROP;
2530 /* Scan the set of h-b-h options, process ones that we understand */
2531 error1 = ip6_scan_hbh_options (b1, ip1, hbh1, opt1, limit1, &next1);
2534 /* Has the classifier flagged this buffer for special treatment? */
2537 && (vnet_buffer (b0)->l2_classify.opaque_index & OI_DECAP)))
2538 next0 = hm->next_override;
2540 /* Has the classifier flagged this buffer for special treatment? */
2543 && (vnet_buffer (b1)->l2_classify.opaque_index & OI_DECAP)))
2544 next1 = hm->next_override;
2546 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)))
2548 if (b0->flags & VLIB_BUFFER_IS_TRACED)
2550 ip6_hop_by_hop_trace_t *t =
2551 vlib_add_trace (vm, node, b0, sizeof (*t));
2552 u32 trace_len = (hbh0->length + 1) << 3;
2553 t->next_index = next0;
2554 /* Capture the h-b-h option verbatim */
2557 ARRAY_LEN (t->option_data) ? trace_len :
2558 ARRAY_LEN (t->option_data);
2559 t->trace_len = trace_len;
2560 clib_memcpy_fast (t->option_data, hbh0, trace_len);
2562 if (b1->flags & VLIB_BUFFER_IS_TRACED)
2564 ip6_hop_by_hop_trace_t *t =
2565 vlib_add_trace (vm, node, b1, sizeof (*t));
2566 u32 trace_len = (hbh1->length + 1) << 3;
2567 t->next_index = next1;
2568 /* Capture the h-b-h option verbatim */
2571 ARRAY_LEN (t->option_data) ? trace_len :
2572 ARRAY_LEN (t->option_data);
2573 t->trace_len = trace_len;
2574 clib_memcpy_fast (t->option_data, hbh1, trace_len);
2579 b0->error = error_node->errors[error0];
2580 b1->error = error_node->errors[error1];
2582 /* verify speculative enqueue, maybe switch current next frame */
2583 vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
2584 n_left_to_next, bi0, bi1, next0,
2588 while (n_left_from > 0 && n_left_to_next > 0)
2594 ip6_hop_by_hop_header_t *hbh0;
2595 ip6_hop_by_hop_option_t *opt0, *limit0;
2598 /* Speculatively enqueue b0 to the current next frame */
2604 n_left_to_next -= 1;
2606 b0 = vlib_get_buffer (vm, bi0);
2608 * Default use the next_index from the adjacency.
2609 * A HBH option rarely redirects to a different node
2611 u32 adj_index0 = vnet_buffer (b0)->ip.adj_index[VLIB_TX];
2612 ip_adjacency_t *adj0 = adj_get (adj_index0);
2613 next0 = adj0->lookup_next_index;
2615 ip0 = vlib_buffer_get_current (b0);
2616 hbh0 = (ip6_hop_by_hop_header_t *) (ip0 + 1);
2617 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2619 (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 +
2620 ((hbh0->length + 1) << 3));
2623 * Basic validity checks
2625 if ((hbh0->length + 1) << 3 >
2626 clib_net_to_host_u16 (ip0->payload_length))
2628 error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2629 next0 = IP_LOOKUP_NEXT_DROP;
2633 /* Scan the set of h-b-h options, process ones that we understand */
2634 error0 = ip6_scan_hbh_options (b0, ip0, hbh0, opt0, limit0, &next0);
2637 /* Has the classifier flagged this buffer for special treatment? */
2640 && (vnet_buffer (b0)->l2_classify.opaque_index & OI_DECAP)))
2641 next0 = hm->next_override;
2643 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
2645 ip6_hop_by_hop_trace_t *t =
2646 vlib_add_trace (vm, node, b0, sizeof (*t));
2647 u32 trace_len = (hbh0->length + 1) << 3;
2648 t->next_index = next0;
2649 /* Capture the h-b-h option verbatim */
2652 ARRAY_LEN (t->option_data) ? trace_len :
2653 ARRAY_LEN (t->option_data);
2654 t->trace_len = trace_len;
2655 clib_memcpy_fast (t->option_data, hbh0, trace_len);
2658 b0->error = error_node->errors[error0];
2660 /* verify speculative enqueue, maybe switch current next frame */
2661 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
2662 n_left_to_next, bi0, next0);
2664 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2666 return frame->n_vectors;
2670 VLIB_REGISTER_NODE (ip6_hop_by_hop_node) =
2672 .name = "ip6-hop-by-hop",
2673 .sibling_of = "ip6-lookup",
2674 .vector_size = sizeof (u32),
2675 .format_trace = format_ip6_hop_by_hop_trace,
2676 .type = VLIB_NODE_TYPE_INTERNAL,
2677 .n_errors = ARRAY_LEN (ip6_hop_by_hop_error_strings),
2678 .error_strings = ip6_hop_by_hop_error_strings,
2683 static clib_error_t *
2684 ip6_hop_by_hop_init (vlib_main_t * vm)
2686 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2687 clib_memset (hm->options, 0, sizeof (hm->options));
2688 clib_memset (hm->trace, 0, sizeof (hm->trace));
2689 hm->next_override = IP6_LOOKUP_NEXT_POP_HOP_BY_HOP;
2693 VLIB_INIT_FUNCTION (ip6_hop_by_hop_init);
2695 #ifndef CLIB_MARCH_VARIANT
2697 ip6_hbh_set_next_override (uword next)
2699 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2701 hm->next_override = next;
2705 ip6_hbh_register_option (u8 option,
2706 int options (vlib_buffer_t * b, ip6_header_t * ip,
2707 ip6_hop_by_hop_option_t * opt),
2708 u8 * trace (u8 * s, ip6_hop_by_hop_option_t * opt))
2710 ip6_main_t *im = &ip6_main;
2711 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2713 ASSERT ((u32) option < ARRAY_LEN (hm->options));
2715 /* Already registered */
2716 if (hm->options[option])
2719 hm->options[option] = options;
2720 hm->trace[option] = trace;
2722 /* Set global variable */
2723 im->hbh_enabled = 1;
2729 ip6_hbh_unregister_option (u8 option)
2731 ip6_main_t *im = &ip6_main;
2732 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2734 ASSERT ((u32) option < ARRAY_LEN (hm->options));
2736 /* Not registered */
2737 if (!hm->options[option])
2740 hm->options[option] = NULL;
2741 hm->trace[option] = NULL;
2743 /* Disable global knob if this was the last option configured */
2746 for (i = 0; i < 256; i++)
2748 if (hm->options[option])
2755 im->hbh_enabled = 0;
2760 /* Global IP6 main. */
2761 ip6_main_t ip6_main;
2764 static clib_error_t *
2765 ip6_lookup_init (vlib_main_t * vm)
2767 ip6_main_t *im = &ip6_main;
2768 clib_error_t *error;
2771 if ((error = vlib_call_init_function (vm, vnet_feature_init)))
2774 for (i = 0; i < ARRAY_LEN (im->fib_masks); i++)
2781 for (j = 0; j < i0; j++)
2782 im->fib_masks[i].as_u32[j] = ~0;
2785 im->fib_masks[i].as_u32[i0] =
2786 clib_host_to_net_u32 (pow2_mask (i1) << (32 - i1));
2789 ip_lookup_init (&im->lookup_main, /* is_ip6 */ 1);
2791 if (im->lookup_table_nbuckets == 0)
2792 im->lookup_table_nbuckets = IP6_FIB_DEFAULT_HASH_NUM_BUCKETS;
2794 im->lookup_table_nbuckets = 1 << max_log2 (im->lookup_table_nbuckets);
2796 if (im->lookup_table_size == 0)
2797 im->lookup_table_size = IP6_FIB_DEFAULT_HASH_MEMORY_SIZE;
2799 clib_bihash_init_24_8 (&(im->ip6_table[IP6_FIB_TABLE_FWDING].ip6_hash),
2800 "ip6 FIB fwding table",
2801 im->lookup_table_nbuckets, im->lookup_table_size);
2802 clib_bihash_init_24_8 (&im->ip6_table[IP6_FIB_TABLE_NON_FWDING].ip6_hash,
2803 "ip6 FIB non-fwding table",
2804 im->lookup_table_nbuckets, im->lookup_table_size);
2805 clib_bihash_init_40_8 (&im->ip6_mtable.ip6_mhash,
2807 im->lookup_table_nbuckets, im->lookup_table_size);
2809 /* Create FIB with index 0 and table id of 0. */
2810 fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6, 0,
2811 FIB_SOURCE_DEFAULT_ROUTE);
2812 mfib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6, 0,
2813 MFIB_SOURCE_DEFAULT_ROUTE);
2817 pn = pg_get_node (ip6_lookup_node.index);
2818 pn->unformat_edit = unformat_pg_ip6_header;
2821 /* Unless explicitly configured, don't process HBH options */
2822 im->hbh_enabled = 0;
2827 VLIB_INIT_FUNCTION (ip6_lookup_init);
2829 #ifndef CLIB_MARCH_VARIANT
2831 vnet_set_ip6_flow_hash (u32 table_id, u32 flow_hash_config)
2835 fib_index = fib_table_find (FIB_PROTOCOL_IP6, table_id);
2837 if (~0 == fib_index)
2838 return VNET_API_ERROR_NO_SUCH_FIB;
2840 fib_table_set_flow_hash_config (fib_index, FIB_PROTOCOL_IP6,
2847 static clib_error_t *
2848 set_ip6_flow_hash_command_fn (vlib_main_t * vm,
2849 unformat_input_t * input,
2850 vlib_cli_command_t * cmd)
2854 u32 flow_hash_config = 0;
2857 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
2859 if (unformat (input, "table %d", &table_id))
2862 else if (unformat (input, #a)) { flow_hash_config |= v; matched=1;}
2863 foreach_flow_hash_bit
2870 return clib_error_return (0, "unknown input `%U'",
2871 format_unformat_error, input);
2873 rv = vnet_set_ip6_flow_hash (table_id, flow_hash_config);
2880 return clib_error_return (0, "no such FIB table %d", table_id);
2883 clib_warning ("BUG: illegal flow hash config 0x%x", flow_hash_config);
2891 * Configure the set of IPv6 fields used by the flow hash.
2895 * Example of how to set the flow hash on a given table:
2896 * @cliexcmd{set ip6 flow-hash table 8 dst sport dport proto}
2898 * Example of display the configured flow hash:
2899 * @cliexstart{show ip6 fib}
2900 * ipv6-VRF:0, fib_index 0, flow hash: src dst sport dport proto
2903 * [@0]: dpo-load-balance: [index:5 buckets:1 uRPF:5 to:[0:0]]
2904 * [0] [@0]: dpo-drop ip6
2907 * [@0]: dpo-load-balance: [index:10 buckets:1 uRPF:10 to:[0:0]]
2908 * [0] [@2]: dpo-receive
2911 * [@0]: dpo-load-balance: [index:8 buckets:1 uRPF:8 to:[0:0]]
2912 * [0] [@2]: dpo-receive
2915 * [@0]: dpo-load-balance: [index:7 buckets:1 uRPF:7 to:[0:0]]
2916 * [0] [@2]: dpo-receive
2919 * [@0]: dpo-load-balance: [index:9 buckets:1 uRPF:9 to:[0:0]]
2920 * [0] [@2]: dpo-receive
2921 * ff02::1:ff00:0/104
2923 * [@0]: dpo-load-balance: [index:6 buckets:1 uRPF:6 to:[0:0]]
2924 * [0] [@2]: dpo-receive
2925 * ipv6-VRF:8, fib_index 1, flow hash: dst sport dport proto
2928 * [@0]: dpo-load-balance: [index:21 buckets:1 uRPF:20 to:[0:0]]
2929 * [0] [@0]: dpo-drop ip6
2932 * [@0]: dpo-load-balance: [index:27 buckets:1 uRPF:26 to:[0:0]]
2933 * [0] [@4]: ipv6-glean: af_packet0
2936 * [@0]: dpo-load-balance: [index:28 buckets:1 uRPF:27 to:[0:0]]
2937 * [0] [@2]: dpo-receive: @::a:1:1:0:7 on af_packet0
2940 * [@0]: dpo-load-balance: [index:26 buckets:1 uRPF:25 to:[0:0]]
2941 * [0] [@2]: dpo-receive
2942 * fe80::fe:3eff:fe3e:9222/128
2944 * [@0]: dpo-load-balance: [index:29 buckets:1 uRPF:28 to:[0:0]]
2945 * [0] [@2]: dpo-receive: fe80::fe:3eff:fe3e:9222 on af_packet0
2948 * [@0]: dpo-load-balance: [index:24 buckets:1 uRPF:23 to:[0:0]]
2949 * [0] [@2]: dpo-receive
2952 * [@0]: dpo-load-balance: [index:23 buckets:1 uRPF:22 to:[0:0]]
2953 * [0] [@2]: dpo-receive
2956 * [@0]: dpo-load-balance: [index:25 buckets:1 uRPF:24 to:[0:0]]
2957 * [0] [@2]: dpo-receive
2958 * ff02::1:ff00:0/104
2960 * [@0]: dpo-load-balance: [index:22 buckets:1 uRPF:21 to:[0:0]]
2961 * [0] [@2]: dpo-receive
2966 VLIB_CLI_COMMAND (set_ip6_flow_hash_command, static) =
2968 .path = "set ip6 flow-hash",
2970 "set ip6 flow-hash table <table-id> [src] [dst] [sport] [dport] [proto] [reverse]",
2971 .function = set_ip6_flow_hash_command_fn,
2975 static clib_error_t *
2976 show_ip6_local_command_fn (vlib_main_t * vm,
2977 unformat_input_t * input, vlib_cli_command_t * cmd)
2979 ip6_main_t *im = &ip6_main;
2980 ip_lookup_main_t *lm = &im->lookup_main;
2983 vlib_cli_output (vm, "Protocols handled by ip6_local");
2984 for (i = 0; i < ARRAY_LEN (lm->local_next_by_ip_protocol); i++)
2986 if (lm->local_next_by_ip_protocol[i] != IP_LOCAL_NEXT_PUNT)
2989 u32 node_index = vlib_get_node (vm,
2990 ip6_local_node.index)->
2991 next_nodes[lm->local_next_by_ip_protocol[i]];
2992 vlib_cli_output (vm, "%d: %U", i, format_vlib_node_name, vm,
3002 * Display the set of protocols handled by the local IPv6 stack.
3005 * Example of how to display local protocol table:
3006 * @cliexstart{show ip6 local}
3007 * Protocols handled by ip6_local
3015 VLIB_CLI_COMMAND (show_ip6_local, static) =
3017 .path = "show ip6 local",
3018 .function = show_ip6_local_command_fn,
3019 .short_help = "show ip6 local",
3023 #ifndef CLIB_MARCH_VARIANT
3025 vnet_set_ip6_classify_intfc (vlib_main_t * vm, u32 sw_if_index,
3028 vnet_main_t *vnm = vnet_get_main ();
3029 vnet_interface_main_t *im = &vnm->interface_main;
3030 ip6_main_t *ipm = &ip6_main;
3031 ip_lookup_main_t *lm = &ipm->lookup_main;
3032 vnet_classify_main_t *cm = &vnet_classify_main;
3033 ip6_address_t *if_addr;
3035 if (pool_is_free_index (im->sw_interfaces, sw_if_index))
3036 return VNET_API_ERROR_NO_MATCHING_INTERFACE;
3038 if (table_index != ~0 && pool_is_free_index (cm->tables, table_index))
3039 return VNET_API_ERROR_NO_SUCH_ENTRY;
3041 vec_validate (lm->classify_table_index_by_sw_if_index, sw_if_index);
3042 lm->classify_table_index_by_sw_if_index[sw_if_index] = table_index;
3044 if_addr = ip6_interface_first_address (ipm, sw_if_index);
3046 if (NULL != if_addr)
3048 fib_prefix_t pfx = {
3050 .fp_proto = FIB_PROTOCOL_IP6,
3051 .fp_addr.ip6 = *if_addr,
3055 fib_index = fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4,
3059 if (table_index != (u32) ~ 0)
3061 dpo_id_t dpo = DPO_INVALID;
3066 classify_dpo_create (DPO_PROTO_IP6, table_index));
3068 fib_table_entry_special_dpo_add (fib_index,
3070 FIB_SOURCE_CLASSIFY,
3071 FIB_ENTRY_FLAG_NONE, &dpo);
3076 fib_table_entry_special_remove (fib_index,
3077 &pfx, FIB_SOURCE_CLASSIFY);
3085 static clib_error_t *
3086 set_ip6_classify_command_fn (vlib_main_t * vm,
3087 unformat_input_t * input,
3088 vlib_cli_command_t * cmd)
3090 u32 table_index = ~0;
3091 int table_index_set = 0;
3092 u32 sw_if_index = ~0;
3095 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
3097 if (unformat (input, "table-index %d", &table_index))
3098 table_index_set = 1;
3099 else if (unformat (input, "intfc %U", unformat_vnet_sw_interface,
3100 vnet_get_main (), &sw_if_index))
3106 if (table_index_set == 0)
3107 return clib_error_return (0, "classify table-index must be specified");
3109 if (sw_if_index == ~0)
3110 return clib_error_return (0, "interface / subif must be specified");
3112 rv = vnet_set_ip6_classify_intfc (vm, sw_if_index, table_index);
3119 case VNET_API_ERROR_NO_MATCHING_INTERFACE:
3120 return clib_error_return (0, "No such interface");
3122 case VNET_API_ERROR_NO_SUCH_ENTRY:
3123 return clib_error_return (0, "No such classifier table");
3129 * Assign a classification table to an interface. The classification
3130 * table is created using the '<em>classify table</em>' and '<em>classify session</em>'
3131 * commands. Once the table is create, use this command to filter packets
3135 * Example of how to assign a classification table to an interface:
3136 * @cliexcmd{set ip6 classify intfc GigabitEthernet2/0/0 table-index 1}
3139 VLIB_CLI_COMMAND (set_ip6_classify_command, static) =
3141 .path = "set ip6 classify",
3143 "set ip6 classify intfc <interface> table-index <classify-idx>",
3144 .function = set_ip6_classify_command_fn,
3148 static clib_error_t *
3149 ip6_config (vlib_main_t * vm, unformat_input_t * input)
3151 ip6_main_t *im = &ip6_main;
3156 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
3158 if (unformat (input, "hash-buckets %d", &tmp))
3160 else if (unformat (input, "heap-size %U",
3161 unformat_memory_size, &heapsize))
3164 return clib_error_return (0, "unknown input '%U'",
3165 format_unformat_error, input);
3168 im->lookup_table_nbuckets = nbuckets;
3169 im->lookup_table_size = heapsize;
3174 VLIB_EARLY_CONFIG_FUNCTION (ip6_config, "ip6");
3177 * fd.io coding-style-patch-verification: ON
3180 * eval: (c-set-style "gnu")