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/receive_dpo.h>
52 #include <vnet/dpo/classify_dpo.h>
53 #include <vnet/classify/vnet_classify.h>
54 #include <vnet/pg/pg.h>
56 #ifndef CLIB_MARCH_VARIANT
57 #include <vppinfra/bihash_template.c>
59 #include <vnet/ip/ip6_forward.h>
60 #include <vnet/interface_output.h>
62 /* Flag used by IOAM code. Classifier sets it pop-hop-by-hop checks it */
63 #define OI_DECAP 0x80000000
66 ip6_add_interface_prefix_routes (ip6_main_t * im,
69 ip6_address_t * address, u32 address_length)
71 ip_lookup_main_t *lm = &im->lookup_main;
72 ip_interface_prefix_t *if_prefix;
75 ip_interface_prefix_key_t key = {
77 .fp_len = address_length,
78 .fp_proto = FIB_PROTOCOL_IP6,
81 address->as_u64[0] & im->fib_masks[address_length].as_u64[0],
82 address->as_u64[1] & im->fib_masks[address_length].as_u64[1],
86 .sw_if_index = sw_if_index,
90 /* If prefix already set on interface, just increment ref count & return */
91 if_prefix = ip_get_interface_prefix (lm, &key);
94 if_prefix->ref_count += 1;
98 /* New prefix - allocate a pool entry, initialize it, add to the hash */
99 pool_get (lm->if_prefix_pool, if_prefix);
100 if_prefix->ref_count = 1;
101 clib_memcpy (&if_prefix->key, &key, sizeof (key));
102 mhash_set (&lm->prefix_to_if_prefix_index, &key,
103 if_prefix - lm->if_prefix_pool, 0 /* old value */ );
105 /* length < 128 - add glean */
106 if (address_length < 128)
108 /* set the glean route for the prefix */
109 fib_table_entry_update_one_path (fib_index, &key.prefix,
110 FIB_SOURCE_INTERFACE,
111 (FIB_ENTRY_FLAG_CONNECTED |
112 FIB_ENTRY_FLAG_ATTACHED),
114 /* No next-hop address */
116 /* invalid FIB index */
118 /* no out-label stack */
119 NULL, FIB_ROUTE_PATH_FLAG_NONE);
124 ip6_add_interface_routes (vnet_main_t * vnm, u32 sw_if_index,
125 ip6_main_t * im, u32 fib_index,
126 ip_interface_address_t * a)
128 ip_lookup_main_t *lm = &im->lookup_main;
129 ip6_address_t *address = ip_interface_address_get_address (lm, a);
131 .fp_len = a->address_length,
132 .fp_proto = FIB_PROTOCOL_IP6,
133 .fp_addr.ip6 = *address,
136 /* set special routes for the prefix if needed */
137 ip6_add_interface_prefix_routes (im, sw_if_index, fib_index,
138 address, a->address_length);
141 if (sw_if_index < vec_len (lm->classify_table_index_by_sw_if_index))
143 u32 classify_table_index =
144 lm->classify_table_index_by_sw_if_index[sw_if_index];
145 if (classify_table_index != (u32) ~ 0)
147 dpo_id_t dpo = DPO_INVALID;
152 classify_dpo_create (DPO_PROTO_IP6, classify_table_index));
154 fib_table_entry_special_dpo_add (fib_index,
157 FIB_ENTRY_FLAG_NONE, &dpo);
162 fib_table_entry_update_one_path (fib_index, &pfx,
163 FIB_SOURCE_INTERFACE,
164 (FIB_ENTRY_FLAG_CONNECTED |
165 FIB_ENTRY_FLAG_LOCAL),
169 1, NULL, FIB_ROUTE_PATH_FLAG_NONE);
173 ip6_del_interface_prefix_routes (ip6_main_t * im,
176 ip6_address_t * address, u32 address_length)
178 ip_lookup_main_t *lm = &im->lookup_main;
179 ip_interface_prefix_t *if_prefix;
182 ip_interface_prefix_key_t key = {
184 .fp_len = address_length,
185 .fp_proto = FIB_PROTOCOL_IP6,
188 address->as_u64[0] & im->fib_masks[address_length].as_u64[0],
189 address->as_u64[1] & im->fib_masks[address_length].as_u64[1],
193 .sw_if_index = sw_if_index,
197 if_prefix = ip_get_interface_prefix (lm, &key);
200 clib_warning ("Prefix not found while deleting %U",
201 format_ip4_address_and_length, address, address_length);
205 /* If not deleting last intf addr in prefix, decrement ref count & return */
206 if_prefix->ref_count -= 1;
207 if (if_prefix->ref_count > 0)
210 /* length <= 128, delete glean route */
211 if (address_length <= 128)
213 /* remove glean route for prefix */
214 fib_table_entry_delete (fib_index, &key.prefix, FIB_SOURCE_INTERFACE);
217 mhash_unset (&lm->prefix_to_if_prefix_index, &key, 0 /* old_value */ );
218 pool_put (lm->if_prefix_pool, if_prefix);
222 ip6_del_interface_routes (u32 sw_if_index, ip6_main_t * im,
224 ip6_address_t * address, u32 address_length)
228 .fp_proto = FIB_PROTOCOL_IP6,
229 .fp_addr.ip6 = *address,
232 /* delete special routes for the prefix if needed */
233 ip6_del_interface_prefix_routes (im, sw_if_index, fib_index,
234 address, address_length);
236 fib_table_entry_delete (fib_index, &pfx, FIB_SOURCE_INTERFACE);
239 #ifndef CLIB_MARCH_VARIANT
241 ip6_sw_interface_enable_disable (u32 sw_if_index, u32 is_enable)
243 ip6_main_t *im = &ip6_main;
244 vnet_main_t *vnm = vnet_get_main ();
245 vnet_hw_interface_t *hi = vnet_get_sup_hw_interface (vnm, sw_if_index);
247 vec_validate_init_empty (im->ip_enabled_by_sw_if_index, sw_if_index, 0);
250 * enable/disable only on the 1<->0 transition
254 if (1 != ++im->ip_enabled_by_sw_if_index[sw_if_index])
259 /* The ref count is 0 when an address is removed from an interface that has
260 * no address - this is not a ciritical error */
261 if (0 == im->ip_enabled_by_sw_if_index[sw_if_index] ||
262 0 != --im->ip_enabled_by_sw_if_index[sw_if_index])
266 vnet_feature_enable_disable ("ip6-unicast", "ip6-not-enabled", sw_if_index,
269 vnet_feature_enable_disable ("ip6-multicast", "ip6-not-enabled",
270 sw_if_index, !is_enable, 0, 0);
274 else if (hi->l3_if_count)
278 /* get first interface address */
280 ip6_interface_first_address (ip6_main_t * im, u32 sw_if_index)
282 ip_lookup_main_t *lm = &im->lookup_main;
283 ip_interface_address_t *ia = 0;
284 ip6_address_t *result = 0;
287 foreach_ip_interface_address (lm, ia, sw_if_index,
288 1 /* honor unnumbered */,
290 ip6_address_t * a = ip_interface_address_get_address (lm, ia);
299 ip6_add_del_interface_address (vlib_main_t * vm,
301 ip6_address_t * address,
302 u32 address_length, u32 is_del)
304 vnet_main_t *vnm = vnet_get_main ();
305 ip6_main_t *im = &ip6_main;
306 ip_lookup_main_t *lm = &im->lookup_main;
307 clib_error_t *error = NULL;
308 u32 if_address_index;
309 ip6_address_fib_t ip6_af, *addr_fib = 0;
310 const ip6_address_t *ll_addr;
312 error = vnet_sw_interface_supports_addressing (vnm, sw_if_index);
315 vnm->api_errno = VNET_API_ERROR_UNSUPPORTED;
319 if (ip6_address_is_link_local_unicast (address))
321 if (address_length != 128)
323 vnm->api_errno = VNET_API_ERROR_ADDRESS_LENGTH_MISMATCH;
326 ("prefix length of link-local address must be 128");
332 rv = ip6_link_set_local_address (sw_if_index, address);
337 return clib_error_create ("address not assignable");
342 ll_addr = ip6_get_link_local_address (sw_if_index);
343 if (ip6_address_is_equal (ll_addr, address))
345 vnm->api_errno = VNET_API_ERROR_ADDRESS_NOT_DELETABLE;
346 return clib_error_create ("address not deletable");
350 vnm->api_errno = VNET_API_ERROR_ADDRESS_NOT_FOUND_FOR_INTERFACE;
351 return clib_error_create ("address not found");
358 ip6_addr_fib_init (&ip6_af, address,
359 vec_elt (im->fib_index_by_sw_if_index, sw_if_index));
360 vec_add1 (addr_fib, ip6_af);
365 /* When adding an address check that it does not conflict
366 with an existing address on any interface in this table. */
367 ip_interface_address_t *ia;
368 vnet_sw_interface_t *sif;
370 pool_foreach (sif, vnm->interface_main.sw_interfaces)
372 if (im->fib_index_by_sw_if_index[sw_if_index] ==
373 im->fib_index_by_sw_if_index[sif->sw_if_index])
375 foreach_ip_interface_address
376 (&im->lookup_main, ia, sif->sw_if_index,
377 0 /* honor unnumbered */ ,
380 ip_interface_address_get_address
381 (&im->lookup_main, ia);
383 if (ip6_destination_matches_route
384 (im, address, x, ia->address_length) ||
385 ip6_destination_matches_route (im,
390 /* an intf may have >1 addr from the same prefix */
391 if ((sw_if_index == sif->sw_if_index) &&
392 (ia->address_length == address_length) &&
393 !ip6_address_is_equal (x, address))
396 if (ia->flags & IP_INTERFACE_ADDRESS_FLAG_STALE)
397 /* if the address we're comparing against is stale
398 * then the CP has not added this one back yet, maybe
399 * it never will, so we have to assume it won't and
400 * ignore it. if it does add it back, then it will fail
401 * because this one is now present */
404 /* error if the length or intf was different */
405 vnm->api_errno = VNET_API_ERROR_DUPLICATE_IF_ADDRESS;
406 error = clib_error_create
407 ("failed to add %U which conflicts with %U for interface %U",
408 format_ip6_address_and_length, address,
410 format_ip6_address_and_length, x,
412 format_vnet_sw_if_index_name, vnm,
422 if_address_index = ip_interface_address_find (lm, addr_fib, address_length);
426 if (~0 == if_address_index)
428 vnm->api_errno = VNET_API_ERROR_ADDRESS_NOT_FOUND_FOR_INTERFACE;
429 error = clib_error_create ("%U not found for interface %U",
430 lm->format_address_and_length,
431 addr_fib, address_length,
432 format_vnet_sw_if_index_name, vnm,
437 error = ip_interface_address_del (lm, vnm, if_address_index, addr_fib,
438 address_length, sw_if_index);
444 if (~0 != if_address_index)
446 ip_interface_address_t *ia;
448 ia = pool_elt_at_index (lm->if_address_pool, if_address_index);
450 if (ia->flags & IP_INTERFACE_ADDRESS_FLAG_STALE)
452 if (ia->sw_if_index == sw_if_index)
454 /* re-adding an address during the replace action.
455 * consdier this the update. clear the flag and
457 ia->flags &= ~IP_INTERFACE_ADDRESS_FLAG_STALE;
462 /* The prefix is moving from one interface to another.
463 * delete the stale and add the new */
464 ip6_add_del_interface_address (vm,
466 address, address_length, 1);
468 error = ip_interface_address_add (lm, sw_if_index,
469 addr_fib, address_length,
475 vnm->api_errno = VNET_API_ERROR_DUPLICATE_IF_ADDRESS;
476 error = clib_error_create
477 ("Prefix %U already found on interface %U",
478 lm->format_address_and_length, addr_fib, address_length,
479 format_vnet_sw_if_index_name, vnm, ia->sw_if_index);
483 error = ip_interface_address_add (lm, sw_if_index,
484 addr_fib, address_length,
491 ip6_sw_interface_enable_disable (sw_if_index, !is_del);
493 ip6_link_enable (sw_if_index, NULL);
495 /* intf addr routes are added/deleted on admin up/down */
496 if (vnet_sw_interface_is_admin_up (vnm, sw_if_index))
499 ip6_del_interface_routes (sw_if_index,
500 im, ip6_af.fib_index, address,
503 ip6_add_interface_routes (vnm, sw_if_index,
504 im, ip6_af.fib_index,
505 pool_elt_at_index (lm->if_address_pool,
509 ip6_add_del_interface_address_callback_t *cb;
510 vec_foreach (cb, im->add_del_interface_address_callbacks)
511 cb->function (im, cb->function_opaque, sw_if_index,
512 address, address_length, if_address_index, is_del);
515 ip6_link_disable (sw_if_index);
524 static clib_error_t *
525 ip6_sw_interface_admin_up_down (vnet_main_t * vnm, u32 sw_if_index, u32 flags)
527 ip6_main_t *im = &ip6_main;
528 ip_interface_address_t *ia;
530 u32 is_admin_up, fib_index;
532 vec_validate_init_empty (im->
533 lookup_main.if_address_pool_index_by_sw_if_index,
536 is_admin_up = (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) != 0;
538 fib_index = vec_elt (im->fib_index_by_sw_if_index, sw_if_index);
541 foreach_ip_interface_address (&im->lookup_main, ia, sw_if_index,
542 0 /* honor unnumbered */,
544 a = ip_interface_address_get_address (&im->lookup_main, ia);
546 ip6_add_interface_routes (vnm, sw_if_index,
550 ip6_del_interface_routes (sw_if_index, im, fib_index,
551 a, ia->address_length);
558 VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION (ip6_sw_interface_admin_up_down);
560 /* Built-in ip6 unicast rx feature path definition */
562 VNET_FEATURE_ARC_INIT (ip6_unicast, static) =
564 .arc_name = "ip6-unicast",
565 .start_nodes = VNET_FEATURES ("ip6-input"),
566 .last_in_arc = "ip6-lookup",
567 .arc_index_ptr = &ip6_main.lookup_main.ucast_feature_arc_index,
570 VNET_FEATURE_INIT (ip6_flow_classify, static) =
572 .arc_name = "ip6-unicast",
573 .node_name = "ip6-flow-classify",
574 .runs_before = VNET_FEATURES ("ip6-inacl"),
577 VNET_FEATURE_INIT (ip6_inacl, static) =
579 .arc_name = "ip6-unicast",
580 .node_name = "ip6-inacl",
581 .runs_before = VNET_FEATURES ("ip6-policer-classify"),
584 VNET_FEATURE_INIT (ip6_policer_classify, static) =
586 .arc_name = "ip6-unicast",
587 .node_name = "ip6-policer-classify",
588 .runs_before = VNET_FEATURES ("ipsec6-input-feature"),
591 VNET_FEATURE_INIT (ip6_ipsec, static) =
593 .arc_name = "ip6-unicast",
594 .node_name = "ipsec6-input-feature",
595 .runs_before = VNET_FEATURES ("l2tp-decap"),
598 VNET_FEATURE_INIT (ip6_l2tp, static) =
600 .arc_name = "ip6-unicast",
601 .node_name = "l2tp-decap",
602 .runs_before = VNET_FEATURES ("vpath-input-ip6"),
605 VNET_FEATURE_INIT (ip6_vpath, static) =
607 .arc_name = "ip6-unicast",
608 .node_name = "vpath-input-ip6",
609 .runs_before = VNET_FEATURES ("ip6-vxlan-bypass"),
612 VNET_FEATURE_INIT (ip6_vxlan_bypass, static) =
614 .arc_name = "ip6-unicast",
615 .node_name = "ip6-vxlan-bypass",
616 .runs_before = VNET_FEATURES ("ip6-lookup"),
619 VNET_FEATURE_INIT (ip6_not_enabled, static) =
621 .arc_name = "ip6-unicast",
622 .node_name = "ip6-not-enabled",
623 .runs_before = VNET_FEATURES ("ip6-lookup"),
626 VNET_FEATURE_INIT (ip6_lookup, static) =
628 .arc_name = "ip6-unicast",
629 .node_name = "ip6-lookup",
630 .runs_before = 0, /*last feature*/
633 /* Built-in ip6 multicast rx feature path definition (none now) */
634 VNET_FEATURE_ARC_INIT (ip6_multicast, static) =
636 .arc_name = "ip6-multicast",
637 .start_nodes = VNET_FEATURES ("ip6-input"),
638 .last_in_arc = "ip6-mfib-forward-lookup",
639 .arc_index_ptr = &ip6_main.lookup_main.mcast_feature_arc_index,
642 VNET_FEATURE_INIT (ip6_vpath_mc, static) = {
643 .arc_name = "ip6-multicast",
644 .node_name = "vpath-input-ip6",
645 .runs_before = VNET_FEATURES ("ip6-mfib-forward-lookup"),
648 VNET_FEATURE_INIT (ip6_not_enabled_mc, static) = {
649 .arc_name = "ip6-multicast",
650 .node_name = "ip6-not-enabled",
651 .runs_before = VNET_FEATURES ("ip6-mfib-forward-lookup"),
654 VNET_FEATURE_INIT (ip6_mc_lookup, static) = {
655 .arc_name = "ip6-multicast",
656 .node_name = "ip6-mfib-forward-lookup",
657 .runs_before = 0, /* last feature */
660 /* Built-in ip4 tx feature path definition */
661 VNET_FEATURE_ARC_INIT (ip6_output, static) =
663 .arc_name = "ip6-output",
664 .start_nodes = VNET_FEATURES ("ip6-rewrite", "ip6-midchain", "ip6-dvr-dpo"),
665 .last_in_arc = "interface-output",
666 .arc_index_ptr = &ip6_main.lookup_main.output_feature_arc_index,
669 VNET_FEATURE_INIT (ip6_outacl, static) = {
670 .arc_name = "ip6-output",
671 .node_name = "ip6-outacl",
672 .runs_before = VNET_FEATURES ("ipsec6-output-feature"),
675 VNET_FEATURE_INIT (ip6_ipsec_output, static) = {
676 .arc_name = "ip6-output",
677 .node_name = "ipsec6-output-feature",
678 .runs_before = VNET_FEATURES ("interface-output"),
681 VNET_FEATURE_INIT (ip6_interface_output, static) = {
682 .arc_name = "ip6-output",
683 .node_name = "interface-output",
684 .runs_before = 0, /* not before any other features */
688 static clib_error_t *
689 ip6_sw_interface_add_del (vnet_main_t * vnm, u32 sw_if_index, u32 is_add)
691 ip6_main_t *im = &ip6_main;
693 vec_validate_init_empty (im->fib_index_by_sw_if_index, sw_if_index, ~0);
694 vec_validate_init_empty (im->mfib_index_by_sw_if_index, sw_if_index, ~0);
698 /* Fill in lookup tables with default table (0). */
699 im->fib_index_by_sw_if_index[sw_if_index] = 0;
700 im->mfib_index_by_sw_if_index[sw_if_index] = 0;
704 /* Ensure that IPv6 is disabled */
705 ip6_main_t *im6 = &ip6_main;
706 ip_lookup_main_t *lm6 = &im6->lookup_main;
707 ip_interface_address_t *ia = 0;
708 ip6_address_t *address;
709 vlib_main_t *vm = vlib_get_main ();
711 vnet_sw_interface_update_unnumbered (sw_if_index, ~0, 0);
713 foreach_ip_interface_address (lm6, ia, sw_if_index, 0,
715 address = ip_interface_address_get_address (lm6, ia);
716 ip6_add_del_interface_address(vm, sw_if_index, address, ia->address_length, 1);
719 ip6_mfib_interface_enable_disable (sw_if_index, 0);
722 vnet_feature_enable_disable ("ip6-unicast", "ip6-not-enabled", sw_if_index,
725 vnet_feature_enable_disable ("ip6-multicast", "ip6-not-enabled",
726 sw_if_index, is_add, 0, 0);
728 return /* no error */ 0;
731 VNET_SW_INTERFACE_ADD_DEL_FUNCTION (ip6_sw_interface_add_del);
733 VLIB_NODE_FN (ip6_lookup_node) (vlib_main_t * vm,
734 vlib_node_runtime_t * node,
735 vlib_frame_t * frame)
737 return ip6_lookup_inline (vm, node, frame);
740 static u8 *format_ip6_lookup_trace (u8 * s, va_list * args);
743 VLIB_REGISTER_NODE (ip6_lookup_node) =
745 .name = "ip6-lookup",
746 .vector_size = sizeof (u32),
747 .format_trace = format_ip6_lookup_trace,
748 .n_next_nodes = IP6_LOOKUP_N_NEXT,
749 .next_nodes = IP6_LOOKUP_NEXT_NODES,
753 VLIB_NODE_FN (ip6_load_balance_node) (vlib_main_t * vm,
754 vlib_node_runtime_t * node,
755 vlib_frame_t * frame)
757 vlib_combined_counter_main_t *cm = &load_balance_main.lbm_via_counters;
759 u32 thread_index = vm->thread_index;
760 ip6_main_t *im = &ip6_main;
761 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs;
762 u16 nexts[VLIB_FRAME_SIZE], *next;
764 from = vlib_frame_vector_args (frame);
765 n_left = frame->n_vectors;
768 vlib_get_buffers (vm, from, bufs, n_left);
772 const load_balance_t *lb0, *lb1;
773 const ip6_header_t *ip0, *ip1;
774 u32 lbi0, hc0, lbi1, hc1;
775 const dpo_id_t *dpo0, *dpo1;
777 /* Prefetch next iteration. */
779 vlib_prefetch_buffer_header (b[2], STORE);
780 vlib_prefetch_buffer_header (b[3], STORE);
782 CLIB_PREFETCH (b[2]->data, sizeof (ip0[0]), STORE);
783 CLIB_PREFETCH (b[3]->data, sizeof (ip0[0]), STORE);
786 ip0 = vlib_buffer_get_current (b[0]);
787 ip1 = vlib_buffer_get_current (b[1]);
788 lbi0 = vnet_buffer (b[0])->ip.adj_index[VLIB_TX];
789 lbi1 = vnet_buffer (b[1])->ip.adj_index[VLIB_TX];
791 lb0 = load_balance_get (lbi0);
792 lb1 = load_balance_get (lbi1);
795 * this node is for via FIBs we can re-use the hash value from the
796 * to node if present.
797 * We don't want to use the same hash value at each level in the recursion
798 * graph as that would lead to polarisation
802 if (PREDICT_FALSE (lb0->lb_n_buckets > 1))
804 if (PREDICT_TRUE (vnet_buffer (b[0])->ip.flow_hash))
806 hc0 = vnet_buffer (b[0])->ip.flow_hash =
807 vnet_buffer (b[0])->ip.flow_hash >> 1;
811 hc0 = vnet_buffer (b[0])->ip.flow_hash =
812 ip6_compute_flow_hash (ip0, lb0->lb_hash_config);
814 dpo0 = load_balance_get_fwd_bucket
815 (lb0, (hc0 & (lb0->lb_n_buckets_minus_1)));
819 dpo0 = load_balance_get_bucket_i (lb0, 0);
821 if (PREDICT_FALSE (lb1->lb_n_buckets > 1))
823 if (PREDICT_TRUE (vnet_buffer (b[1])->ip.flow_hash))
825 hc1 = vnet_buffer (b[1])->ip.flow_hash =
826 vnet_buffer (b[1])->ip.flow_hash >> 1;
830 hc1 = vnet_buffer (b[1])->ip.flow_hash =
831 ip6_compute_flow_hash (ip1, lb1->lb_hash_config);
833 dpo1 = load_balance_get_fwd_bucket
834 (lb1, (hc1 & (lb1->lb_n_buckets_minus_1)));
838 dpo1 = load_balance_get_bucket_i (lb1, 0);
841 next[0] = dpo0->dpoi_next_node;
842 next[1] = dpo1->dpoi_next_node;
844 /* Only process the HBH Option Header if explicitly configured to do so */
845 if (PREDICT_FALSE (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
847 next[0] = (dpo_is_adj (dpo0) && im->hbh_enabled) ?
848 (ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next[0];
850 /* Only process the HBH Option Header if explicitly configured to do so */
851 if (PREDICT_FALSE (ip1->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
853 next[1] = (dpo_is_adj (dpo1) && im->hbh_enabled) ?
854 (ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next[1];
857 vnet_buffer (b[0])->ip.adj_index[VLIB_TX] = dpo0->dpoi_index;
858 vnet_buffer (b[1])->ip.adj_index[VLIB_TX] = dpo1->dpoi_index;
860 vlib_increment_combined_counter
861 (cm, thread_index, lbi0, 1, vlib_buffer_length_in_chain (vm, b[0]));
862 vlib_increment_combined_counter
863 (cm, thread_index, lbi1, 1, vlib_buffer_length_in_chain (vm, b[1]));
872 const load_balance_t *lb0;
873 const ip6_header_t *ip0;
874 const dpo_id_t *dpo0;
877 ip0 = vlib_buffer_get_current (b[0]);
878 lbi0 = vnet_buffer (b[0])->ip.adj_index[VLIB_TX];
880 lb0 = load_balance_get (lbi0);
883 if (PREDICT_FALSE (lb0->lb_n_buckets > 1))
885 if (PREDICT_TRUE (vnet_buffer (b[0])->ip.flow_hash))
887 hc0 = vnet_buffer (b[0])->ip.flow_hash =
888 vnet_buffer (b[0])->ip.flow_hash >> 1;
892 hc0 = vnet_buffer (b[0])->ip.flow_hash =
893 ip6_compute_flow_hash (ip0, lb0->lb_hash_config);
895 dpo0 = load_balance_get_fwd_bucket
896 (lb0, (hc0 & (lb0->lb_n_buckets_minus_1)));
900 dpo0 = load_balance_get_bucket_i (lb0, 0);
903 next[0] = dpo0->dpoi_next_node;
904 vnet_buffer (b[0])->ip.adj_index[VLIB_TX] = dpo0->dpoi_index;
906 /* Only process the HBH Option Header if explicitly configured to do so */
907 if (PREDICT_FALSE (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
909 next[0] = (dpo_is_adj (dpo0) && im->hbh_enabled) ?
910 (ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next[0];
913 vlib_increment_combined_counter
914 (cm, thread_index, lbi0, 1, vlib_buffer_length_in_chain (vm, b[0]));
921 vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors);
923 if (node->flags & VLIB_NODE_FLAG_TRACE)
924 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
926 return frame->n_vectors;
930 VLIB_REGISTER_NODE (ip6_load_balance_node) =
932 .name = "ip6-load-balance",
933 .vector_size = sizeof (u32),
934 .sibling_of = "ip6-lookup",
935 .format_trace = format_ip6_lookup_trace,
941 /* Adjacency taken. */
946 /* Packet data, possibly *after* rewrite. */
947 u8 packet_data[128 - 1 * sizeof (u32)];
949 ip6_forward_next_trace_t;
951 #ifndef CLIB_MARCH_VARIANT
953 format_ip6_forward_next_trace (u8 * s, va_list * args)
955 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
956 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
957 ip6_forward_next_trace_t *t = va_arg (*args, ip6_forward_next_trace_t *);
958 u32 indent = format_get_indent (s);
960 s = format (s, "%Ufib:%d adj:%d flow:%d",
961 format_white_space, indent,
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_lookup_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, "fib %d dpo-idx %d flow hash: 0x%08x",
979 t->fib_index, t->adj_index, t->flow_hash);
980 s = format (s, "\n%U%U",
981 format_white_space, indent,
982 format_ip6_header, t->packet_data, sizeof (t->packet_data));
988 format_ip6_rewrite_trace (u8 * s, va_list * args)
990 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
991 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
992 ip6_forward_next_trace_t *t = va_arg (*args, ip6_forward_next_trace_t *);
993 u32 indent = format_get_indent (s);
995 s = format (s, "tx_sw_if_index %d adj-idx %d : %U flow hash: 0x%08x",
996 t->fib_index, t->adj_index, format_ip_adjacency,
997 t->adj_index, FORMAT_IP_ADJACENCY_NONE, t->flow_hash);
998 s = format (s, "\n%U%U",
999 format_white_space, indent,
1000 format_ip_adjacency_packet_data,
1001 t->packet_data, sizeof (t->packet_data));
1005 /* Common trace function for all ip6-forward next nodes. */
1006 #ifndef CLIB_MARCH_VARIANT
1008 ip6_forward_next_trace (vlib_main_t * vm,
1009 vlib_node_runtime_t * node,
1010 vlib_frame_t * frame, vlib_rx_or_tx_t which_adj_index)
1013 ip6_main_t *im = &ip6_main;
1015 n_left = frame->n_vectors;
1016 from = vlib_frame_vector_args (frame);
1021 vlib_buffer_t *b0, *b1;
1022 ip6_forward_next_trace_t *t0, *t1;
1024 /* Prefetch next iteration. */
1025 vlib_prefetch_buffer_with_index (vm, from[2], LOAD);
1026 vlib_prefetch_buffer_with_index (vm, from[3], LOAD);
1031 b0 = vlib_get_buffer (vm, bi0);
1032 b1 = vlib_get_buffer (vm, bi1);
1034 if (b0->flags & VLIB_BUFFER_IS_TRACED)
1036 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
1037 t0->adj_index = vnet_buffer (b0)->ip.adj_index[which_adj_index];
1038 t0->flow_hash = vnet_buffer (b0)->ip.flow_hash;
1040 (vnet_buffer (b0)->sw_if_index[VLIB_TX] !=
1041 (u32) ~ 0) ? vnet_buffer (b0)->sw_if_index[VLIB_TX] :
1042 vec_elt (im->fib_index_by_sw_if_index,
1043 vnet_buffer (b0)->sw_if_index[VLIB_RX]);
1045 clib_memcpy_fast (t0->packet_data,
1046 vlib_buffer_get_current (b0),
1047 sizeof (t0->packet_data));
1049 if (b1->flags & VLIB_BUFFER_IS_TRACED)
1051 t1 = vlib_add_trace (vm, node, b1, sizeof (t1[0]));
1052 t1->adj_index = vnet_buffer (b1)->ip.adj_index[which_adj_index];
1053 t1->flow_hash = vnet_buffer (b1)->ip.flow_hash;
1055 (vnet_buffer (b1)->sw_if_index[VLIB_TX] !=
1056 (u32) ~ 0) ? vnet_buffer (b1)->sw_if_index[VLIB_TX] :
1057 vec_elt (im->fib_index_by_sw_if_index,
1058 vnet_buffer (b1)->sw_if_index[VLIB_RX]);
1060 clib_memcpy_fast (t1->packet_data,
1061 vlib_buffer_get_current (b1),
1062 sizeof (t1->packet_data));
1072 ip6_forward_next_trace_t *t0;
1076 b0 = vlib_get_buffer (vm, bi0);
1078 if (b0->flags & VLIB_BUFFER_IS_TRACED)
1080 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
1081 t0->adj_index = vnet_buffer (b0)->ip.adj_index[which_adj_index];
1082 t0->flow_hash = vnet_buffer (b0)->ip.flow_hash;
1084 (vnet_buffer (b0)->sw_if_index[VLIB_TX] !=
1085 (u32) ~ 0) ? vnet_buffer (b0)->sw_if_index[VLIB_TX] :
1086 vec_elt (im->fib_index_by_sw_if_index,
1087 vnet_buffer (b0)->sw_if_index[VLIB_RX]);
1089 clib_memcpy_fast (t0->packet_data,
1090 vlib_buffer_get_current (b0),
1091 sizeof (t0->packet_data));
1098 /* Compute TCP/UDP/ICMP6 checksum in software. */
1100 ip6_tcp_udp_icmp_compute_checksum (vlib_main_t * vm, vlib_buffer_t * p0,
1101 ip6_header_t * ip0, int *bogus_lengthp)
1104 u16 payload_length, payload_length_host_byte_order;
1106 u32 headers_size = sizeof (ip0[0]);
1107 u8 *data_this_buffer;
1108 u8 next_hdr = ip0->protocol;
1110 ASSERT (bogus_lengthp);
1113 payload_length_host_byte_order = clib_net_to_host_u16 (ip0->payload_length);
1114 data_this_buffer = (u8 *) (ip0 + 1);
1115 payload_length = ip0->payload_length;
1117 /* some icmp packets may come with a "router alert" hop-by-hop extension header (e.g., mldv2 packets)
1118 * or UDP-Ping packets */
1119 if (PREDICT_FALSE (next_hdr == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
1122 ip6_hop_by_hop_ext_t *ext_hdr =
1123 (ip6_hop_by_hop_ext_t *) data_this_buffer;
1125 /* validate really icmp6 next */
1126 ASSERT ((ext_hdr->next_hdr == IP_PROTOCOL_ICMP6)
1127 || (ext_hdr->next_hdr == IP_PROTOCOL_UDP));
1129 skip_bytes = 8 * (1 + ext_hdr->n_data_u64s);
1130 data_this_buffer = (void *) ((u8 *) data_this_buffer + skip_bytes);
1132 payload_length_host_byte_order -= skip_bytes;
1133 headers_size += skip_bytes;
1135 /* pseudo-header adjustments:
1136 * exclude ext header bytes from payload length
1137 * use payload IP proto rather than ext header IP proto
1139 payload_length = clib_host_to_net_u16 (payload_length_host_byte_order);
1140 next_hdr = ext_hdr->next_hdr;
1143 /* Initialize checksum with ip pseudo-header. */
1144 sum0 = payload_length + clib_host_to_net_u16 (next_hdr);
1146 for (i = 0; i < ARRAY_LEN (ip0->src_address.as_uword); i++)
1148 sum0 = ip_csum_with_carry
1149 (sum0, clib_mem_unaligned (&ip0->src_address.as_uword[i], uword));
1150 sum0 = ip_csum_with_carry
1151 (sum0, clib_mem_unaligned (&ip0->dst_address.as_uword[i], uword));
1155 return ip_calculate_l4_checksum (vm, p0, sum0,
1156 payload_length_host_byte_order,
1157 (u8 *) ip0, headers_size, NULL);
1159 return ip_calculate_l4_checksum (vm, 0, sum0,
1160 payload_length_host_byte_order, NULL, 0,
1165 ip6_tcp_udp_icmp_validate_checksum (vlib_main_t * vm, vlib_buffer_t * p0)
1167 ip6_header_t *ip0 = vlib_buffer_get_current (p0);
1172 /* some icmp packets may come with a "router alert" hop-by-hop extension header (e.g., mldv2 packets) */
1173 ASSERT (ip0->protocol == IP_PROTOCOL_TCP
1174 || ip0->protocol == IP_PROTOCOL_ICMP6
1175 || ip0->protocol == IP_PROTOCOL_UDP
1176 || ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS);
1178 udp0 = (void *) (ip0 + 1);
1179 if (ip0->protocol == IP_PROTOCOL_UDP && udp0->checksum == 0)
1181 p0->flags |= (VNET_BUFFER_F_L4_CHECKSUM_COMPUTED
1182 | VNET_BUFFER_F_L4_CHECKSUM_CORRECT);
1186 sum16 = ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip0, &bogus_length);
1188 p0->flags |= (VNET_BUFFER_F_L4_CHECKSUM_COMPUTED
1189 | ((sum16 == 0) << VNET_BUFFER_F_LOG2_L4_CHECKSUM_CORRECT));
1196 * @brief returns number of links on which src is reachable.
1199 ip6_urpf_loose_check (ip6_main_t * im, vlib_buffer_t * b, ip6_header_t * i)
1201 const load_balance_t *lb0;
1205 fib_index = vec_elt (im->fib_index_by_sw_if_index,
1206 vnet_buffer (b)->sw_if_index[VLIB_RX]);
1208 (vnet_buffer (b)->sw_if_index[VLIB_TX] == (u32) ~ 0) ?
1209 fib_index : vnet_buffer (b)->sw_if_index[VLIB_TX];
1211 lbi = ip6_fib_table_fwding_lookup (fib_index, &i->src_address);
1212 lb0 = load_balance_get (lbi);
1214 return (fib_urpf_check_size (lb0->lb_urpf));
1218 ip6_next_proto_is_tcp_udp (vlib_buffer_t * p0, ip6_header_t * ip0,
1222 proto0 = ip6_locate_header (p0, ip0, IP_PROTOCOL_UDP, udp_offset0);
1223 if (proto0 != IP_PROTOCOL_UDP)
1225 proto0 = ip6_locate_header (p0, ip0, IP_PROTOCOL_TCP, udp_offset0);
1226 proto0 = (proto0 == IP_PROTOCOL_TCP) ? proto0 : 0;
1232 VNET_FEATURE_ARC_INIT (ip6_local) = {
1233 .arc_name = "ip6-local",
1234 .start_nodes = VNET_FEATURES ("ip6-local", "ip6-receive"),
1238 static_always_inline u8
1239 ip6_tcp_udp_icmp_bad_length (vlib_main_t * vm, vlib_buffer_t * p0)
1242 u16 payload_length_host_byte_order;
1243 u32 n_this_buffer, n_bytes_left;
1244 ip6_header_t *ip0 = vlib_buffer_get_current (p0);
1245 u32 headers_size = sizeof (ip0[0]);
1246 u8 *data_this_buffer;
1249 data_this_buffer = (u8 *) (ip0 + 1);
1251 ip6_hop_by_hop_ext_t *ext_hdr = (ip6_hop_by_hop_ext_t *) data_this_buffer;
1253 /* validate really icmp6 next */
1255 if (!(ext_hdr->next_hdr == IP_PROTOCOL_ICMP6)
1256 || (ext_hdr->next_hdr == IP_PROTOCOL_UDP))
1260 payload_length_host_byte_order = clib_net_to_host_u16 (ip0->payload_length);
1261 n_bytes_left = n_this_buffer = payload_length_host_byte_order;
1264 u32 n_ip_bytes_this_buffer =
1265 p0->current_length - (((u8 *) ip0 - p0->data) - p0->current_data);
1266 if (n_this_buffer + headers_size > n_ip_bytes_this_buffer)
1268 n_this_buffer = p0->current_length > headers_size ?
1269 n_ip_bytes_this_buffer - headers_size : 0;
1272 n_bytes_left -= n_this_buffer;
1273 n_bytes_left -= p0->total_length_not_including_first_buffer;
1275 if (n_bytes_left == 0)
1282 ip6_local_inline (vlib_main_t *vm, vlib_node_runtime_t *node,
1283 vlib_frame_t *frame, int head_of_feature_arc,
1286 ip6_main_t *im = &ip6_main;
1287 ip_lookup_main_t *lm = &im->lookup_main;
1288 u32 *from, n_left_from;
1289 vlib_node_runtime_t *error_node =
1290 vlib_node_get_runtime (vm, ip6_input_node.index);
1291 u8 arc_index = vnet_feat_arc_ip6_local.feature_arc_index;
1292 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
1293 u16 nexts[VLIB_FRAME_SIZE], *next;
1295 from = vlib_frame_vector_args (frame);
1296 n_left_from = frame->n_vectors;
1298 if (node->flags & VLIB_NODE_FLAG_TRACE)
1299 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
1301 vlib_get_buffers (vm, from, bufs, n_left_from);
1305 while (n_left_from > 2)
1307 /* Prefetch next iteration. */
1308 if (n_left_from >= 6)
1310 vlib_prefetch_buffer_header (b[4], STORE);
1311 vlib_prefetch_buffer_header (b[5], STORE);
1312 vlib_prefetch_buffer_data (b[2], LOAD);
1313 vlib_prefetch_buffer_data (b[3], LOAD);
1316 ip6_error_t error[2];
1317 error[0] = IP6_ERROR_UNKNOWN_PROTOCOL;
1318 error[1] = IP6_ERROR_UNKNOWN_PROTOCOL;
1320 ip6_header_t *ip[2];
1321 ip[0] = vlib_buffer_get_current (b[0]);
1322 ip[1] = vlib_buffer_get_current (b[1]);
1324 if (head_of_feature_arc)
1326 vnet_buffer (b[0])->l3_hdr_offset = b[0]->current_data;
1327 vnet_buffer (b[1])->l3_hdr_offset = b[1]->current_data;
1330 type[0] = lm->builtin_protocol_by_ip_protocol[ip[0]->protocol];
1331 type[1] = lm->builtin_protocol_by_ip_protocol[ip[1]->protocol];
1334 flags[0] = b[0]->flags;
1335 flags[1] = b[1]->flags;
1337 vnet_buffer_oflags_t oflags[2];
1338 oflags[0] = vnet_buffer (b[0])->oflags;
1339 oflags[1] = vnet_buffer (b[1])->oflags;
1342 l4_offload[0] = (flags[0] & VNET_BUFFER_F_OFFLOAD) &&
1343 (oflags[0] & (VNET_BUFFER_OFFLOAD_F_TCP_CKSUM |
1344 VNET_BUFFER_OFFLOAD_F_UDP_CKSUM));
1345 l4_offload[1] = (flags[1] & VNET_BUFFER_F_OFFLOAD) &&
1346 (oflags[1] & (VNET_BUFFER_OFFLOAD_F_TCP_CKSUM |
1347 VNET_BUFFER_OFFLOAD_F_UDP_CKSUM));
1349 u32 good_l4_csum[2];
1351 (flags[0] & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) | l4_offload[0];
1353 (flags[1] & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) | l4_offload[1];
1355 u32 udp_offset[2] = { };
1358 ip6_next_proto_is_tcp_udp (b[0], ip[0], &udp_offset[0]);
1360 ip6_next_proto_is_tcp_udp (b[1], ip[1], &udp_offset[1]);
1361 i16 len_diff[2] = { 0 };
1362 if (PREDICT_TRUE (is_tcp_udp[0]))
1365 (udp_header_t *) ((u8 *) ip[0] + udp_offset[0]);
1366 good_l4_csum[0] |= type[0] == IP_BUILTIN_PROTOCOL_UDP
1367 && udp->checksum == 0;
1368 /* optimistically verify UDP length. */
1369 u16 ip_len, udp_len;
1370 ip_len = clib_net_to_host_u16 (ip[0]->payload_length);
1371 udp_len = clib_net_to_host_u16 (udp->length);
1372 len_diff[0] = ip_len - udp_len;
1374 if (PREDICT_TRUE (is_tcp_udp[1]))
1377 (udp_header_t *) ((u8 *) ip[1] + udp_offset[1]);
1378 good_l4_csum[1] |= type[1] == IP_BUILTIN_PROTOCOL_UDP
1379 && udp->checksum == 0;
1380 /* optimistically verify UDP length. */
1381 u16 ip_len, udp_len;
1382 ip_len = clib_net_to_host_u16 (ip[1]->payload_length);
1383 udp_len = clib_net_to_host_u16 (udp->length);
1384 len_diff[1] = ip_len - udp_len;
1387 good_l4_csum[0] |= type[0] == IP_BUILTIN_PROTOCOL_UNKNOWN;
1388 good_l4_csum[1] |= type[1] == IP_BUILTIN_PROTOCOL_UNKNOWN;
1390 len_diff[0] = type[0] == IP_BUILTIN_PROTOCOL_UDP ? len_diff[0] : 0;
1391 len_diff[1] = type[1] == IP_BUILTIN_PROTOCOL_UDP ? len_diff[1] : 0;
1394 need_csum[0] = type[0] != IP_BUILTIN_PROTOCOL_UNKNOWN
1396 && !(flags[0] & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED);
1397 need_csum[1] = type[1] != IP_BUILTIN_PROTOCOL_UNKNOWN
1399 && !(flags[1] & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED);
1400 if (PREDICT_FALSE (need_csum[0]))
1402 flags[0] = ip6_tcp_udp_icmp_validate_checksum (vm, b[0]);
1403 good_l4_csum[0] = flags[0] & VNET_BUFFER_F_L4_CHECKSUM_CORRECT;
1404 error[0] = IP6_ERROR_UNKNOWN_PROTOCOL;
1408 if (ip6_tcp_udp_icmp_bad_length (vm, b[0]))
1409 error[0] = IP6_ERROR_BAD_LENGTH;
1411 if (PREDICT_FALSE (need_csum[1]))
1413 flags[1] = ip6_tcp_udp_icmp_validate_checksum (vm, b[1]);
1414 good_l4_csum[1] = flags[1] & VNET_BUFFER_F_L4_CHECKSUM_CORRECT;
1415 error[1] = IP6_ERROR_UNKNOWN_PROTOCOL;
1419 if (ip6_tcp_udp_icmp_bad_length (vm, b[1]))
1420 error[1] = IP6_ERROR_BAD_LENGTH;
1424 error[0] = len_diff[0] < 0 ? IP6_ERROR_UDP_LENGTH : error[0];
1426 error[1] = len_diff[1] < 0 ? IP6_ERROR_UDP_LENGTH : error[1];
1428 STATIC_ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_UDP ==
1429 IP6_ERROR_UDP_CHECKSUM,
1430 "Wrong IP6 errors constants");
1431 STATIC_ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_ICMP ==
1432 IP6_ERROR_ICMP_CHECKSUM,
1433 "Wrong IP6 errors constants");
1436 !good_l4_csum[0] ? IP6_ERROR_UDP_CHECKSUM + type[0] : error[0];
1438 !good_l4_csum[1] ? IP6_ERROR_UDP_CHECKSUM + type[1] : error[1];
1440 /* Drop packets from unroutable hosts. */
1441 /* If this is a neighbor solicitation (ICMP), skip source RPF check */
1443 unroutable[0] = error[0] == IP6_ERROR_UNKNOWN_PROTOCOL
1444 && type[0] != IP_BUILTIN_PROTOCOL_ICMP
1445 && !ip6_address_is_link_local_unicast (&ip[0]->src_address);
1446 unroutable[1] = error[1] == IP6_ERROR_UNKNOWN_PROTOCOL
1447 && type[1] != IP_BUILTIN_PROTOCOL_ICMP
1448 && !ip6_address_is_link_local_unicast (&ip[1]->src_address);
1449 if (PREDICT_FALSE (unroutable[0]))
1452 !ip6_urpf_loose_check (im, b[0],
1453 ip[0]) ? IP6_ERROR_SRC_LOOKUP_MISS
1456 if (PREDICT_FALSE (unroutable[1]))
1459 !ip6_urpf_loose_check (im, b[1],
1460 ip[1]) ? IP6_ERROR_SRC_LOOKUP_MISS
1464 vnet_buffer (b[0])->ip.fib_index =
1465 vnet_buffer (b[0])->sw_if_index[VLIB_TX] != ~0 ?
1466 vnet_buffer (b[0])->sw_if_index[VLIB_TX] :
1467 vnet_buffer (b[0])->ip.fib_index;
1468 vnet_buffer (b[1])->ip.fib_index =
1469 vnet_buffer (b[1])->sw_if_index[VLIB_TX] != ~0 ?
1470 vnet_buffer (b[1])->sw_if_index[VLIB_TX] :
1471 vnet_buffer (b[1])->ip.fib_index;
1474 const receive_dpo_t *rd0, *rd1;
1476 receive_dpo_get (vnet_buffer (b[0])->ip.adj_index[VLIB_TX]);
1478 receive_dpo_get (vnet_buffer (b[1])->ip.adj_index[VLIB_TX]);
1479 vnet_buffer (b[0])->ip.rx_sw_if_index = rd0->rd_sw_if_index;
1480 vnet_buffer (b[1])->ip.rx_sw_if_index = rd1->rd_sw_if_index;
1484 vnet_buffer (b[0])->ip.rx_sw_if_index = ~0;
1485 vnet_buffer (b[1])->ip.rx_sw_if_index = ~0;
1487 } /* head_of_feature_arc */
1489 next[0] = lm->local_next_by_ip_protocol[ip[0]->protocol];
1491 error[0] != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next[0];
1492 next[1] = lm->local_next_by_ip_protocol[ip[1]->protocol];
1494 error[1] != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next[1];
1496 b[0]->error = error_node->errors[error[0]];
1497 b[1]->error = error_node->errors[error[1]];
1499 if (head_of_feature_arc)
1502 ip6_unknown[0] = error[0] == (u8) IP6_ERROR_UNKNOWN_PROTOCOL;
1503 ip6_unknown[1] = error[1] == (u8) IP6_ERROR_UNKNOWN_PROTOCOL;
1504 if (PREDICT_TRUE (ip6_unknown[0]))
1506 u32 next32 = next[0];
1507 vnet_feature_arc_start (arc_index,
1508 vnet_buffer (b[0])->sw_if_index
1509 [VLIB_RX], &next32, b[0]);
1512 if (PREDICT_TRUE (ip6_unknown[1]))
1514 u32 next32 = next[1];
1515 vnet_feature_arc_start (arc_index,
1516 vnet_buffer (b[1])->sw_if_index
1517 [VLIB_RX], &next32, b[1]);
1531 error = IP6_ERROR_UNKNOWN_PROTOCOL;
1534 ip = vlib_buffer_get_current (b[0]);
1536 if (head_of_feature_arc)
1538 vnet_buffer (b[0])->l3_hdr_offset = b[0]->current_data;
1539 u8 type = lm->builtin_protocol_by_ip_protocol[ip->protocol];
1541 u32 flags = b[0]->flags;
1543 vnet_buffer_oflags_t oflags = vnet_buffer (b[0])->oflags;
1545 u32 l4_offload = (flags & VNET_BUFFER_F_OFFLOAD) &&
1546 (oflags & (VNET_BUFFER_OFFLOAD_F_TCP_CKSUM |
1547 VNET_BUFFER_OFFLOAD_F_UDP_CKSUM));
1550 (flags & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) | l4_offload;
1553 u8 is_tcp_udp = ip6_next_proto_is_tcp_udp (b[0], ip, &udp_offset);
1554 if (PREDICT_TRUE (is_tcp_udp))
1556 udp_header_t *udp = (udp_header_t *) ((u8 *) ip + udp_offset);
1557 /* Don't verify UDP checksum for packets with explicit zero checksum. */
1558 good_l4_csum |= type == IP_BUILTIN_PROTOCOL_UDP
1559 && udp->checksum == 0;
1560 /* optimistically verify UDP length. */
1561 u16 ip_len, udp_len;
1562 ip_len = clib_net_to_host_u16 (ip->payload_length);
1563 udp_len = clib_net_to_host_u16 (udp->length);
1564 len_diff = ip_len - udp_len;
1567 good_l4_csum |= type == IP_BUILTIN_PROTOCOL_UNKNOWN;
1568 len_diff = type == IP_BUILTIN_PROTOCOL_UDP ? len_diff : 0;
1570 u8 need_csum = type != IP_BUILTIN_PROTOCOL_UNKNOWN &&
1572 !(flags & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED);
1573 if (PREDICT_FALSE (need_csum))
1575 flags = ip6_tcp_udp_icmp_validate_checksum (vm, b[0]);
1576 good_l4_csum = flags & VNET_BUFFER_F_L4_CHECKSUM_CORRECT;
1577 error = IP6_ERROR_UNKNOWN_PROTOCOL;
1581 if (ip6_tcp_udp_icmp_bad_length (vm, b[0]))
1582 error = IP6_ERROR_BAD_LENGTH;
1587 error = len_diff < 0 ? IP6_ERROR_UDP_LENGTH : error;
1588 STATIC_ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_UDP ==
1589 IP6_ERROR_UDP_CHECKSUM,
1590 "Wrong IP6 errors constants");
1591 STATIC_ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_ICMP ==
1592 IP6_ERROR_ICMP_CHECKSUM,
1593 "Wrong IP6 errors constants");
1595 error = !good_l4_csum ? IP6_ERROR_UDP_CHECKSUM + type : error;
1597 /* Drop packets from unroutable hosts. */
1598 /* If this is a neighbor solicitation (ICMP), skip source RPF check */
1599 u8 unroutable = error == IP6_ERROR_UNKNOWN_PROTOCOL
1600 && type != IP_BUILTIN_PROTOCOL_ICMP
1601 && !ip6_address_is_link_local_unicast (&ip->src_address);
1602 if (PREDICT_FALSE (unroutable))
1605 !ip6_urpf_loose_check (im, b[0],
1606 ip) ? IP6_ERROR_SRC_LOOKUP_MISS :
1610 vnet_buffer (b[0])->ip.fib_index =
1611 vnet_buffer (b[0])->sw_if_index[VLIB_TX] != ~0 ?
1612 vnet_buffer (b[0])->sw_if_index[VLIB_TX] :
1613 vnet_buffer (b[0])->ip.fib_index;
1617 rd = receive_dpo_get (vnet_buffer (b[0])->ip.adj_index[VLIB_TX]);
1618 vnet_buffer (b[0])->ip.rx_sw_if_index = rd->rd_sw_if_index;
1621 vnet_buffer (b[0])->ip.rx_sw_if_index = ~0;
1622 } /* head_of_feature_arc */
1624 next[0] = lm->local_next_by_ip_protocol[ip->protocol];
1626 error != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next[0];
1628 b[0]->error = error_node->errors[error];
1630 if (head_of_feature_arc)
1632 if (PREDICT_TRUE (error == (u8) IP6_ERROR_UNKNOWN_PROTOCOL))
1634 u32 next32 = next[0];
1635 vnet_feature_arc_start (arc_index,
1636 vnet_buffer (b[0])->sw_if_index
1637 [VLIB_RX], &next32, b[0]);
1648 vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors);
1649 return frame->n_vectors;
1652 VLIB_NODE_FN (ip6_local_node) (vlib_main_t * vm, vlib_node_runtime_t * node,
1653 vlib_frame_t * frame)
1655 return ip6_local_inline (vm, node, frame, 1 /* head of feature arc */,
1656 0 /* ip6_local_inline */);
1659 VLIB_REGISTER_NODE (ip6_local_node) =
1661 .name = "ip6-local",
1662 .vector_size = sizeof (u32),
1663 .format_trace = format_ip6_forward_next_trace,
1664 .n_next_nodes = IP_LOCAL_N_NEXT,
1667 [IP_LOCAL_NEXT_DROP] = "ip6-drop",
1668 [IP_LOCAL_NEXT_PUNT] = "ip6-punt",
1669 [IP_LOCAL_NEXT_UDP_LOOKUP] = "ip6-udp-lookup",
1670 [IP_LOCAL_NEXT_ICMP] = "ip6-icmp-input",
1671 [IP_LOCAL_NEXT_REASSEMBLY] = "ip6-full-reassembly",
1675 VLIB_NODE_FN (ip6_receive_local_node)
1676 (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
1678 return ip6_local_inline (vm, node, frame, 1 /* head of feature arc */,
1679 1 /* is_receive_dpo */);
1682 VLIB_REGISTER_NODE (ip6_receive_local_node) = {
1683 .name = "ip6-receive",
1684 .vector_size = sizeof (u32),
1685 .format_trace = format_ip6_forward_next_trace,
1686 .sibling_of = "ip6-local"
1689 VLIB_NODE_FN (ip6_local_end_of_arc_node) (vlib_main_t * vm,
1690 vlib_node_runtime_t * node,
1691 vlib_frame_t * frame)
1693 return ip6_local_inline (vm, node, frame, 0 /* head of feature arc */,
1694 0 /* ip6_local_inline */);
1697 VLIB_REGISTER_NODE (ip6_local_end_of_arc_node) = {
1698 .name = "ip6-local-end-of-arc",
1699 .vector_size = sizeof (u32),
1701 .format_trace = format_ip6_forward_next_trace,
1702 .sibling_of = "ip6-local",
1705 VNET_FEATURE_INIT (ip6_local_end_of_arc, static) = {
1706 .arc_name = "ip6-local",
1707 .node_name = "ip6-local-end-of-arc",
1708 .runs_before = 0, /* not before any other features */
1711 #ifdef CLIB_MARCH_VARIANT
1712 extern vlib_node_registration_t ip6_local_node;
1715 ip6_register_protocol (u32 protocol, u32 node_index)
1717 vlib_main_t *vm = vlib_get_main ();
1718 ip6_main_t *im = &ip6_main;
1719 ip_lookup_main_t *lm = &im->lookup_main;
1721 ASSERT (protocol < ARRAY_LEN (lm->local_next_by_ip_protocol));
1722 lm->local_next_by_ip_protocol[protocol] =
1723 vlib_node_add_next (vm, ip6_local_node.index, node_index);
1727 ip6_unregister_protocol (u32 protocol)
1729 ip6_main_t *im = &ip6_main;
1730 ip_lookup_main_t *lm = &im->lookup_main;
1732 ASSERT (protocol < ARRAY_LEN (lm->local_next_by_ip_protocol));
1733 lm->local_next_by_ip_protocol[protocol] = IP_LOCAL_NEXT_PUNT;
1739 IP6_REWRITE_NEXT_DROP,
1740 IP6_REWRITE_NEXT_ICMP_ERROR,
1741 IP6_REWRITE_NEXT_FRAGMENT,
1742 IP6_REWRITE_N_NEXT /* Last */
1743 } ip6_rewrite_next_t;
1746 * This bits of an IPv6 address to mask to construct a multicast
1749 #define IP6_MCAST_ADDR_MASK 0xffffffff
1752 ip6_mtu_check (vlib_buffer_t * b, u16 packet_bytes,
1753 u16 adj_packet_bytes, bool is_locally_generated,
1754 u32 * next, u8 is_midchain, u32 * error)
1756 if (adj_packet_bytes >= 1280 && packet_bytes > adj_packet_bytes)
1758 if (is_locally_generated)
1760 /* IP fragmentation */
1761 ip_frag_set_vnet_buffer (b, adj_packet_bytes,
1763 IP_FRAG_NEXT_IP_REWRITE_MIDCHAIN :
1764 IP_FRAG_NEXT_IP_REWRITE), 0);
1765 *next = IP6_REWRITE_NEXT_FRAGMENT;
1766 *error = IP6_ERROR_MTU_EXCEEDED;
1770 *error = IP6_ERROR_MTU_EXCEEDED;
1771 icmp6_error_set_vnet_buffer (b, ICMP6_packet_too_big, 0,
1773 *next = IP6_REWRITE_NEXT_ICMP_ERROR;
1779 ip6_rewrite_inline_with_gso (vlib_main_t * vm,
1780 vlib_node_runtime_t * node,
1781 vlib_frame_t * frame,
1782 int do_counters, int is_midchain, int is_mcast)
1784 ip_lookup_main_t *lm = &ip6_main.lookup_main;
1785 u32 *from = vlib_frame_vector_args (frame);
1786 u32 n_left_from, n_left_to_next, *to_next, next_index;
1787 vlib_node_runtime_t *error_node =
1788 vlib_node_get_runtime (vm, ip6_input_node.index);
1790 n_left_from = frame->n_vectors;
1791 next_index = node->cached_next_index;
1792 u32 thread_index = vm->thread_index;
1794 while (n_left_from > 0)
1796 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1798 while (n_left_from >= 4 && n_left_to_next >= 2)
1800 const ip_adjacency_t *adj0, *adj1;
1801 vlib_buffer_t *p0, *p1;
1802 ip6_header_t *ip0, *ip1;
1803 u32 pi0, rw_len0, next0, error0, adj_index0;
1804 u32 pi1, rw_len1, next1, error1, adj_index1;
1805 u32 tx_sw_if_index0, tx_sw_if_index1;
1806 bool is_locally_originated0, is_locally_originated1;
1808 /* Prefetch next iteration. */
1810 vlib_buffer_t *p2, *p3;
1812 p2 = vlib_get_buffer (vm, from[2]);
1813 p3 = vlib_get_buffer (vm, from[3]);
1815 vlib_prefetch_buffer_header (p2, LOAD);
1816 vlib_prefetch_buffer_header (p3, LOAD);
1818 clib_prefetch_store (p2->pre_data);
1819 clib_prefetch_store (p3->pre_data);
1821 CLIB_PREFETCH (p2->data, sizeof (ip0[0]), STORE);
1822 CLIB_PREFETCH (p3->data, sizeof (ip0[0]), STORE);
1825 pi0 = to_next[0] = from[0];
1826 pi1 = to_next[1] = from[1];
1831 n_left_to_next -= 2;
1833 p0 = vlib_get_buffer (vm, pi0);
1834 p1 = vlib_get_buffer (vm, pi1);
1836 adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
1837 adj_index1 = vnet_buffer (p1)->ip.adj_index[VLIB_TX];
1839 ip0 = vlib_buffer_get_current (p0);
1840 ip1 = vlib_buffer_get_current (p1);
1842 error0 = error1 = IP6_ERROR_NONE;
1843 next0 = next1 = IP6_REWRITE_NEXT_DROP;
1845 is_locally_originated0 =
1846 p0->flags & VNET_BUFFER_F_LOCALLY_ORIGINATED;
1847 if (PREDICT_TRUE (!is_locally_originated0))
1849 i32 hop_limit0 = ip0->hop_limit;
1851 /* Input node should have reject packets with hop limit 0. */
1852 ASSERT (ip0->hop_limit > 0);
1856 ip0->hop_limit = hop_limit0;
1859 * If the hop count drops below 1 when forwarding, generate
1862 if (PREDICT_FALSE (hop_limit0 <= 0))
1864 error0 = IP6_ERROR_TIME_EXPIRED;
1865 next0 = IP6_REWRITE_NEXT_ICMP_ERROR;
1866 vnet_buffer (p0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
1867 icmp6_error_set_vnet_buffer (p0, ICMP6_time_exceeded,
1868 ICMP6_time_exceeded_ttl_exceeded_in_transit,
1873 is_locally_originated1 =
1874 p1->flags & VNET_BUFFER_F_LOCALLY_ORIGINATED;
1875 if (PREDICT_TRUE (!is_locally_originated1))
1877 i32 hop_limit1 = ip1->hop_limit;
1879 /* Input node should have reject packets with hop limit 0. */
1880 ASSERT (ip1->hop_limit > 0);
1884 ip1->hop_limit = hop_limit1;
1887 * If the hop count drops below 1 when forwarding, generate
1890 if (PREDICT_FALSE (hop_limit1 <= 0))
1892 error1 = IP6_ERROR_TIME_EXPIRED;
1893 next1 = IP6_REWRITE_NEXT_ICMP_ERROR;
1894 vnet_buffer (p1)->sw_if_index[VLIB_TX] = (u32) ~ 0;
1895 icmp6_error_set_vnet_buffer (p1, ICMP6_time_exceeded,
1896 ICMP6_time_exceeded_ttl_exceeded_in_transit,
1901 adj0 = adj_get (adj_index0);
1902 adj1 = adj_get (adj_index1);
1904 rw_len0 = adj0[0].rewrite_header.data_bytes;
1905 rw_len1 = adj1[0].rewrite_header.data_bytes;
1906 vnet_buffer (p0)->ip.save_rewrite_length = rw_len0;
1907 vnet_buffer (p1)->ip.save_rewrite_length = rw_len1;
1911 vlib_increment_combined_counter
1912 (&adjacency_counters,
1913 thread_index, adj_index0, 1,
1914 vlib_buffer_length_in_chain (vm, p0) + rw_len0);
1915 vlib_increment_combined_counter
1916 (&adjacency_counters,
1917 thread_index, adj_index1, 1,
1918 vlib_buffer_length_in_chain (vm, p1) + rw_len1);
1921 /* Check MTU of outgoing interface. */
1923 clib_net_to_host_u16 (ip0->payload_length) +
1924 sizeof (ip6_header_t);
1926 clib_net_to_host_u16 (ip1->payload_length) +
1927 sizeof (ip6_header_t);
1928 if (p0->flags & VNET_BUFFER_F_GSO)
1929 ip0_len = gso_mtu_sz (p0);
1930 if (p1->flags & VNET_BUFFER_F_GSO)
1931 ip1_len = gso_mtu_sz (p1);
1933 ip6_mtu_check (p0, ip0_len,
1934 adj0[0].rewrite_header.max_l3_packet_bytes,
1935 is_locally_originated0, &next0, is_midchain,
1937 ip6_mtu_check (p1, ip1_len,
1938 adj1[0].rewrite_header.max_l3_packet_bytes,
1939 is_locally_originated1, &next1, is_midchain,
1941 /* Don't adjust the buffer for hop count issue; icmp-error node
1942 * wants to see the IP header */
1943 if (PREDICT_TRUE (error0 == IP6_ERROR_NONE))
1945 p0->current_data -= rw_len0;
1946 p0->current_length += rw_len0;
1947 tx_sw_if_index0 = adj0[0].rewrite_header.sw_if_index;
1948 vnet_buffer (p0)->sw_if_index[VLIB_TX] = tx_sw_if_index0;
1949 next0 = adj0[0].rewrite_header.next_index;
1951 (adj0[0].rewrite_header.flags & VNET_REWRITE_HAS_FEATURES))
1952 vnet_feature_arc_start_w_cfg_index
1953 (lm->output_feature_arc_index, tx_sw_if_index0, &next0, p0,
1954 adj0->ia_cfg_index);
1958 p0->error = error_node->errors[error0];
1960 if (PREDICT_TRUE (error1 == IP6_ERROR_NONE))
1962 p1->current_data -= rw_len1;
1963 p1->current_length += rw_len1;
1965 tx_sw_if_index1 = adj1[0].rewrite_header.sw_if_index;
1966 vnet_buffer (p1)->sw_if_index[VLIB_TX] = tx_sw_if_index1;
1967 next1 = adj1[0].rewrite_header.next_index;
1970 (adj1[0].rewrite_header.flags & VNET_REWRITE_HAS_FEATURES))
1971 vnet_feature_arc_start_w_cfg_index
1972 (lm->output_feature_arc_index, tx_sw_if_index1, &next1, p1,
1973 adj1->ia_cfg_index);
1977 p1->error = error_node->errors[error1];
1982 /* before we paint on the next header, update the L4
1983 * checksums if required, since there's no offload on a tunnel */
1984 vnet_calc_checksums_inline (vm, p0, 0 /* is_ip4 */ ,
1986 vnet_calc_checksums_inline (vm, p1, 0 /* is_ip4 */ ,
1989 /* Guess we are only writing on ipv6 header. */
1990 vnet_rewrite_two_headers (adj0[0], adj1[0],
1991 ip0, ip1, sizeof (ip6_header_t));
1994 /* Guess we are only writing on simple Ethernet header. */
1995 vnet_rewrite_two_headers (adj0[0], adj1[0],
1996 ip0, ip1, sizeof (ethernet_header_t));
2000 if (adj0->sub_type.midchain.fixup_func)
2001 adj0->sub_type.midchain.fixup_func
2002 (vm, adj0, p0, adj0->sub_type.midchain.fixup_data);
2003 if (adj1->sub_type.midchain.fixup_func)
2004 adj1->sub_type.midchain.fixup_func
2005 (vm, adj1, p1, adj1->sub_type.midchain.fixup_data);
2010 * copy bytes from the IP address into the MAC rewrite
2012 vnet_ip_mcast_fixup_header (IP6_MCAST_ADDR_MASK,
2014 rewrite_header.dst_mcast_offset,
2015 &ip0->dst_address.as_u32[3],
2017 vnet_ip_mcast_fixup_header (IP6_MCAST_ADDR_MASK,
2019 rewrite_header.dst_mcast_offset,
2020 &ip1->dst_address.as_u32[3],
2024 vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
2025 to_next, n_left_to_next,
2026 pi0, pi1, next0, next1);
2029 while (n_left_from > 0 && n_left_to_next > 0)
2031 ip_adjacency_t *adj0;
2035 u32 adj_index0, next0, error0;
2036 u32 tx_sw_if_index0;
2037 bool is_locally_originated0;
2039 pi0 = to_next[0] = from[0];
2041 p0 = vlib_get_buffer (vm, pi0);
2043 adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
2045 adj0 = adj_get (adj_index0);
2047 ip0 = vlib_buffer_get_current (p0);
2049 error0 = IP6_ERROR_NONE;
2050 next0 = IP6_REWRITE_NEXT_DROP;
2052 /* Check hop limit */
2053 is_locally_originated0 =
2054 p0->flags & VNET_BUFFER_F_LOCALLY_ORIGINATED;
2055 if (PREDICT_TRUE (!is_locally_originated0))
2057 i32 hop_limit0 = ip0->hop_limit;
2059 ASSERT (ip0->hop_limit > 0);
2063 ip0->hop_limit = hop_limit0;
2065 if (PREDICT_FALSE (hop_limit0 <= 0))
2068 * If the hop count drops below 1 when forwarding, generate
2071 error0 = IP6_ERROR_TIME_EXPIRED;
2072 next0 = IP6_REWRITE_NEXT_ICMP_ERROR;
2073 vnet_buffer (p0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
2074 icmp6_error_set_vnet_buffer (p0, ICMP6_time_exceeded,
2075 ICMP6_time_exceeded_ttl_exceeded_in_transit,
2082 vnet_calc_checksums_inline (vm, p0, 0 /* is_ip4 */ ,
2085 /* Guess we are only writing on ip6 header. */
2086 vnet_rewrite_one_header (adj0[0], ip0, sizeof (ip6_header_t));
2089 /* Guess we are only writing on simple Ethernet header. */
2090 vnet_rewrite_one_header (adj0[0], ip0,
2091 sizeof (ethernet_header_t));
2093 /* Update packet buffer attributes/set output interface. */
2094 rw_len0 = adj0[0].rewrite_header.data_bytes;
2095 vnet_buffer (p0)->ip.save_rewrite_length = rw_len0;
2099 vlib_increment_combined_counter
2100 (&adjacency_counters,
2101 thread_index, adj_index0, 1,
2102 vlib_buffer_length_in_chain (vm, p0) + rw_len0);
2105 /* Check MTU of outgoing interface. */
2107 clib_net_to_host_u16 (ip0->payload_length) +
2108 sizeof (ip6_header_t);
2109 if (p0->flags & VNET_BUFFER_F_GSO)
2110 ip0_len = gso_mtu_sz (p0);
2112 ip6_mtu_check (p0, ip0_len,
2113 adj0[0].rewrite_header.max_l3_packet_bytes,
2114 is_locally_originated0, &next0, is_midchain,
2116 /* Don't adjust the buffer for hop count issue; icmp-error node
2117 * wants to see the IP header */
2118 if (PREDICT_TRUE (error0 == IP6_ERROR_NONE))
2120 p0->current_data -= rw_len0;
2121 p0->current_length += rw_len0;
2123 tx_sw_if_index0 = adj0[0].rewrite_header.sw_if_index;
2125 vnet_buffer (p0)->sw_if_index[VLIB_TX] = tx_sw_if_index0;
2126 next0 = adj0[0].rewrite_header.next_index;
2129 (adj0[0].rewrite_header.flags & VNET_REWRITE_HAS_FEATURES))
2130 vnet_feature_arc_start_w_cfg_index
2131 (lm->output_feature_arc_index, tx_sw_if_index0, &next0, p0,
2132 adj0->ia_cfg_index);
2136 p0->error = error_node->errors[error0];
2141 if (adj0->sub_type.midchain.fixup_func)
2142 adj0->sub_type.midchain.fixup_func
2143 (vm, adj0, p0, adj0->sub_type.midchain.fixup_data);
2147 vnet_ip_mcast_fixup_header (IP6_MCAST_ADDR_MASK,
2149 rewrite_header.dst_mcast_offset,
2150 &ip0->dst_address.as_u32[3],
2157 n_left_to_next -= 1;
2159 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
2160 to_next, n_left_to_next,
2164 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2167 /* Need to do trace after rewrites to pick up new packet data. */
2168 if (node->flags & VLIB_NODE_FLAG_TRACE)
2169 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
2171 return frame->n_vectors;
2175 ip6_rewrite_inline (vlib_main_t * vm,
2176 vlib_node_runtime_t * node,
2177 vlib_frame_t * frame,
2178 int do_counters, int is_midchain, int is_mcast)
2180 return ip6_rewrite_inline_with_gso (vm, node, frame, do_counters,
2181 is_midchain, is_mcast);
2184 VLIB_NODE_FN (ip6_rewrite_node) (vlib_main_t * vm,
2185 vlib_node_runtime_t * node,
2186 vlib_frame_t * frame)
2188 if (adj_are_counters_enabled ())
2189 return ip6_rewrite_inline (vm, node, frame, 1, 0, 0);
2191 return ip6_rewrite_inline (vm, node, frame, 0, 0, 0);
2194 VLIB_NODE_FN (ip6_rewrite_bcast_node) (vlib_main_t * vm,
2195 vlib_node_runtime_t * node,
2196 vlib_frame_t * frame)
2198 if (adj_are_counters_enabled ())
2199 return ip6_rewrite_inline (vm, node, frame, 1, 0, 0);
2201 return ip6_rewrite_inline (vm, node, frame, 0, 0, 0);
2204 VLIB_NODE_FN (ip6_rewrite_mcast_node) (vlib_main_t * vm,
2205 vlib_node_runtime_t * node,
2206 vlib_frame_t * frame)
2208 if (adj_are_counters_enabled ())
2209 return ip6_rewrite_inline (vm, node, frame, 1, 0, 1);
2211 return ip6_rewrite_inline (vm, node, frame, 0, 0, 1);
2214 VLIB_NODE_FN (ip6_midchain_node) (vlib_main_t * vm,
2215 vlib_node_runtime_t * node,
2216 vlib_frame_t * frame)
2218 if (adj_are_counters_enabled ())
2219 return ip6_rewrite_inline (vm, node, frame, 1, 1, 0);
2221 return ip6_rewrite_inline (vm, node, frame, 0, 1, 0);
2224 VLIB_NODE_FN (ip6_mcast_midchain_node) (vlib_main_t * vm,
2225 vlib_node_runtime_t * node,
2226 vlib_frame_t * frame)
2228 if (adj_are_counters_enabled ())
2229 return ip6_rewrite_inline (vm, node, frame, 1, 1, 1);
2231 return ip6_rewrite_inline (vm, node, frame, 0, 1, 1);
2235 VLIB_REGISTER_NODE (ip6_midchain_node) =
2237 .name = "ip6-midchain",
2238 .vector_size = sizeof (u32),
2239 .format_trace = format_ip6_forward_next_trace,
2240 .sibling_of = "ip6-rewrite",
2243 VLIB_REGISTER_NODE (ip6_rewrite_node) =
2245 .name = "ip6-rewrite",
2246 .vector_size = sizeof (u32),
2247 .format_trace = format_ip6_rewrite_trace,
2248 .n_next_nodes = IP6_REWRITE_N_NEXT,
2251 [IP6_REWRITE_NEXT_DROP] = "ip6-drop",
2252 [IP6_REWRITE_NEXT_ICMP_ERROR] = "ip6-icmp-error",
2253 [IP6_REWRITE_NEXT_FRAGMENT] = "ip6-frag",
2257 VLIB_REGISTER_NODE (ip6_rewrite_bcast_node) = {
2258 .name = "ip6-rewrite-bcast",
2259 .vector_size = sizeof (u32),
2261 .format_trace = format_ip6_rewrite_trace,
2262 .sibling_of = "ip6-rewrite",
2265 VLIB_REGISTER_NODE (ip6_rewrite_mcast_node) =
2267 .name = "ip6-rewrite-mcast",
2268 .vector_size = sizeof (u32),
2269 .format_trace = format_ip6_rewrite_trace,
2270 .sibling_of = "ip6-rewrite",
2274 VLIB_REGISTER_NODE (ip6_mcast_midchain_node) =
2276 .name = "ip6-mcast-midchain",
2277 .vector_size = sizeof (u32),
2278 .format_trace = format_ip6_rewrite_trace,
2279 .sibling_of = "ip6-rewrite",
2285 * Hop-by-Hop handling
2287 #ifndef CLIB_MARCH_VARIANT
2288 ip6_hop_by_hop_main_t ip6_hop_by_hop_main;
2289 #endif /* CLIB_MARCH_VARIANT */
2291 #define foreach_ip6_hop_by_hop_error \
2292 _(PROCESSED, "pkts with ip6 hop-by-hop options") \
2293 _(FORMAT, "incorrectly formatted hop-by-hop options") \
2294 _(UNKNOWN_OPTION, "unknown ip6 hop-by-hop options")
2299 #define _(sym,str) IP6_HOP_BY_HOP_ERROR_##sym,
2300 foreach_ip6_hop_by_hop_error
2302 IP6_HOP_BY_HOP_N_ERROR,
2303 } ip6_hop_by_hop_error_t;
2307 * Primary h-b-h handler trace support
2308 * We work pretty hard on the problem for obvious reasons
2314 u8 option_data[256];
2315 } ip6_hop_by_hop_trace_t;
2317 extern vlib_node_registration_t ip6_hop_by_hop_node;
2319 static char *ip6_hop_by_hop_error_strings[] = {
2320 #define _(sym,string) string,
2321 foreach_ip6_hop_by_hop_error
2325 #ifndef CLIB_MARCH_VARIANT
2327 format_ip6_hop_by_hop_ext_hdr (u8 * s, va_list * args)
2329 ip6_hop_by_hop_header_t *hbh0 = va_arg (*args, ip6_hop_by_hop_header_t *);
2330 int total_len = va_arg (*args, int);
2331 ip6_hop_by_hop_option_t *opt0, *limit0;
2332 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2334 s = format (s, "IP6_HOP_BY_HOP: next protocol %d len %d total %d",
2335 hbh0->protocol, (hbh0->length + 1) << 3, total_len);
2337 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2338 limit0 = (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 + total_len);
2340 while (opt0 < limit0)
2345 case 0: /* Pad, just stop */
2346 opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0 + 1);
2350 if (hm->trace[type0])
2352 s = (*hm->trace[type0]) (s, opt0);
2356 s = format (s, "\n unrecognized option %d length %d", type0,
2360 (ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length +
2361 sizeof (ip6_hop_by_hop_option_t));
2370 format_ip6_hop_by_hop_trace (u8 * s, va_list * args)
2372 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
2373 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
2374 ip6_hop_by_hop_trace_t *t = va_arg (*args, ip6_hop_by_hop_trace_t *);
2375 ip6_hop_by_hop_header_t *hbh0;
2376 ip6_hop_by_hop_option_t *opt0, *limit0;
2377 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2381 hbh0 = (ip6_hop_by_hop_header_t *) t->option_data;
2383 s = format (s, "IP6_HOP_BY_HOP: next index %d len %d traced %d",
2384 t->next_index, (hbh0->length + 1) << 3, t->trace_len);
2386 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2387 limit0 = (ip6_hop_by_hop_option_t *) ((u8 *) hbh0) + t->trace_len;
2389 while (opt0 < limit0)
2394 case 0: /* Pad, just stop */
2395 opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0) + 1;
2399 if (hm->trace[type0])
2401 s = (*hm->trace[type0]) (s, opt0);
2405 s = format (s, "\n unrecognized option %d length %d", type0,
2409 (ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length +
2410 sizeof (ip6_hop_by_hop_option_t));
2418 ip6_scan_hbh_options (vlib_buffer_t * b0,
2420 ip6_hop_by_hop_header_t * hbh0,
2421 ip6_hop_by_hop_option_t * opt0,
2422 ip6_hop_by_hop_option_t * limit0, u32 * next0)
2424 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2428 while (opt0 < limit0)
2434 opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0) + 1;
2439 if (hm->options[type0])
2441 if ((*hm->options[type0]) (b0, ip0, opt0) < 0)
2443 error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2449 /* Unrecognized mandatory option, check the two high order bits */
2450 switch (opt0->type & HBH_OPTION_TYPE_HIGH_ORDER_BITS)
2452 case HBH_OPTION_TYPE_SKIP_UNKNOWN:
2454 case HBH_OPTION_TYPE_DISCARD_UNKNOWN:
2455 error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2456 *next0 = IP_LOOKUP_NEXT_DROP;
2458 case HBH_OPTION_TYPE_DISCARD_UNKNOWN_ICMP:
2459 error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2460 *next0 = IP_LOOKUP_NEXT_ICMP_ERROR;
2461 icmp6_error_set_vnet_buffer (b0, ICMP6_parameter_problem,
2462 ICMP6_parameter_problem_unrecognized_option,
2463 (u8 *) opt0 - (u8 *) ip0);
2465 case HBH_OPTION_TYPE_DISCARD_UNKNOWN_ICMP_NOT_MCAST:
2466 error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2467 if (!ip6_address_is_multicast (&ip0->dst_address))
2469 *next0 = IP_LOOKUP_NEXT_ICMP_ERROR;
2470 icmp6_error_set_vnet_buffer (b0,
2471 ICMP6_parameter_problem,
2472 ICMP6_parameter_problem_unrecognized_option,
2473 (u8 *) opt0 - (u8 *) ip0);
2477 *next0 = IP_LOOKUP_NEXT_DROP;
2485 (ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length +
2486 sizeof (ip6_hop_by_hop_option_t));
2492 * Process the Hop-by-Hop Options header
2494 VLIB_NODE_FN (ip6_hop_by_hop_node) (vlib_main_t * vm,
2495 vlib_node_runtime_t * node,
2496 vlib_frame_t * frame)
2498 vlib_node_runtime_t *error_node =
2499 vlib_node_get_runtime (vm, ip6_hop_by_hop_node.index);
2500 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2501 u32 n_left_from, *from, *to_next;
2502 ip_lookup_next_t next_index;
2504 from = vlib_frame_vector_args (frame);
2505 n_left_from = frame->n_vectors;
2506 next_index = node->cached_next_index;
2508 while (n_left_from > 0)
2512 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
2514 while (n_left_from >= 4 && n_left_to_next >= 2)
2517 vlib_buffer_t *b0, *b1;
2519 ip6_header_t *ip0, *ip1;
2520 ip6_hop_by_hop_header_t *hbh0, *hbh1;
2521 ip6_hop_by_hop_option_t *opt0, *limit0, *opt1, *limit1;
2522 u8 error0 = 0, error1 = 0;
2524 /* Prefetch next iteration. */
2526 vlib_buffer_t *p2, *p3;
2528 p2 = vlib_get_buffer (vm, from[2]);
2529 p3 = vlib_get_buffer (vm, from[3]);
2531 vlib_prefetch_buffer_header (p2, LOAD);
2532 vlib_prefetch_buffer_header (p3, LOAD);
2534 CLIB_PREFETCH (p2->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
2535 CLIB_PREFETCH (p3->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
2538 /* Speculatively enqueue b0, b1 to the current next frame */
2539 to_next[0] = bi0 = from[0];
2540 to_next[1] = bi1 = from[1];
2544 n_left_to_next -= 2;
2546 b0 = vlib_get_buffer (vm, bi0);
2547 b1 = vlib_get_buffer (vm, bi1);
2549 /* Default use the next_index from the adjacency. A HBH option rarely redirects to a different node */
2550 u32 adj_index0 = vnet_buffer (b0)->ip.adj_index[VLIB_TX];
2551 ip_adjacency_t *adj0 = adj_get (adj_index0);
2552 u32 adj_index1 = vnet_buffer (b1)->ip.adj_index[VLIB_TX];
2553 ip_adjacency_t *adj1 = adj_get (adj_index1);
2555 /* Default use the next_index from the adjacency. A HBH option rarely redirects to a different node */
2556 next0 = adj0->lookup_next_index;
2557 next1 = adj1->lookup_next_index;
2559 ip0 = vlib_buffer_get_current (b0);
2560 ip1 = vlib_buffer_get_current (b1);
2561 hbh0 = (ip6_hop_by_hop_header_t *) (ip0 + 1);
2562 hbh1 = (ip6_hop_by_hop_header_t *) (ip1 + 1);
2563 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2564 opt1 = (ip6_hop_by_hop_option_t *) (hbh1 + 1);
2566 (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 +
2567 ((hbh0->length + 1) << 3));
2569 (ip6_hop_by_hop_option_t *) ((u8 *) hbh1 +
2570 ((hbh1->length + 1) << 3));
2573 * Basic validity checks
2575 if ((hbh0->length + 1) << 3 >
2576 clib_net_to_host_u16 (ip0->payload_length))
2578 error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2579 next0 = IP_LOOKUP_NEXT_DROP;
2582 /* Scan the set of h-b-h options, process ones that we understand */
2583 error0 = ip6_scan_hbh_options (b0, ip0, hbh0, opt0, limit0, &next0);
2585 if ((hbh1->length + 1) << 3 >
2586 clib_net_to_host_u16 (ip1->payload_length))
2588 error1 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2589 next1 = IP_LOOKUP_NEXT_DROP;
2592 /* Scan the set of h-b-h options, process ones that we understand */
2593 error1 = ip6_scan_hbh_options (b1, ip1, hbh1, opt1, limit1, &next1);
2596 /* Has the classifier flagged this buffer for special treatment? */
2599 && (vnet_buffer (b0)->l2_classify.opaque_index & OI_DECAP)))
2600 next0 = hm->next_override;
2602 /* Has the classifier flagged this buffer for special treatment? */
2605 && (vnet_buffer (b1)->l2_classify.opaque_index & OI_DECAP)))
2606 next1 = hm->next_override;
2608 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)))
2610 if (b0->flags & VLIB_BUFFER_IS_TRACED)
2612 ip6_hop_by_hop_trace_t *t =
2613 vlib_add_trace (vm, node, b0, sizeof (*t));
2614 u32 trace_len = (hbh0->length + 1) << 3;
2615 t->next_index = next0;
2616 /* Capture the h-b-h option verbatim */
2619 ARRAY_LEN (t->option_data) ? trace_len :
2620 ARRAY_LEN (t->option_data);
2621 t->trace_len = trace_len;
2622 clib_memcpy_fast (t->option_data, hbh0, trace_len);
2624 if (b1->flags & VLIB_BUFFER_IS_TRACED)
2626 ip6_hop_by_hop_trace_t *t =
2627 vlib_add_trace (vm, node, b1, sizeof (*t));
2628 u32 trace_len = (hbh1->length + 1) << 3;
2629 t->next_index = next1;
2630 /* Capture the h-b-h option verbatim */
2633 ARRAY_LEN (t->option_data) ? trace_len :
2634 ARRAY_LEN (t->option_data);
2635 t->trace_len = trace_len;
2636 clib_memcpy_fast (t->option_data, hbh1, trace_len);
2641 b0->error = error_node->errors[error0];
2642 b1->error = error_node->errors[error1];
2644 /* verify speculative enqueue, maybe switch current next frame */
2645 vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
2646 n_left_to_next, bi0, bi1, next0,
2650 while (n_left_from > 0 && n_left_to_next > 0)
2656 ip6_hop_by_hop_header_t *hbh0;
2657 ip6_hop_by_hop_option_t *opt0, *limit0;
2660 /* Speculatively enqueue b0 to the current next frame */
2666 n_left_to_next -= 1;
2668 b0 = vlib_get_buffer (vm, bi0);
2670 * Default use the next_index from the adjacency.
2671 * A HBH option rarely redirects to a different node
2673 u32 adj_index0 = vnet_buffer (b0)->ip.adj_index[VLIB_TX];
2674 ip_adjacency_t *adj0 = adj_get (adj_index0);
2675 next0 = adj0->lookup_next_index;
2677 ip0 = vlib_buffer_get_current (b0);
2678 hbh0 = (ip6_hop_by_hop_header_t *) (ip0 + 1);
2679 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2681 (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 +
2682 ((hbh0->length + 1) << 3));
2685 * Basic validity checks
2687 if ((hbh0->length + 1) << 3 >
2688 clib_net_to_host_u16 (ip0->payload_length))
2690 error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2691 next0 = IP_LOOKUP_NEXT_DROP;
2695 /* Scan the set of h-b-h options, process ones that we understand */
2696 error0 = ip6_scan_hbh_options (b0, ip0, hbh0, opt0, limit0, &next0);
2699 /* Has the classifier flagged this buffer for special treatment? */
2702 && (vnet_buffer (b0)->l2_classify.opaque_index & OI_DECAP)))
2703 next0 = hm->next_override;
2705 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
2707 ip6_hop_by_hop_trace_t *t =
2708 vlib_add_trace (vm, node, b0, sizeof (*t));
2709 u32 trace_len = (hbh0->length + 1) << 3;
2710 t->next_index = next0;
2711 /* Capture the h-b-h option verbatim */
2714 ARRAY_LEN (t->option_data) ? trace_len :
2715 ARRAY_LEN (t->option_data);
2716 t->trace_len = trace_len;
2717 clib_memcpy_fast (t->option_data, hbh0, trace_len);
2720 b0->error = error_node->errors[error0];
2722 /* verify speculative enqueue, maybe switch current next frame */
2723 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
2724 n_left_to_next, bi0, next0);
2726 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2728 return frame->n_vectors;
2732 VLIB_REGISTER_NODE (ip6_hop_by_hop_node) =
2734 .name = "ip6-hop-by-hop",
2735 .sibling_of = "ip6-lookup",
2736 .vector_size = sizeof (u32),
2737 .format_trace = format_ip6_hop_by_hop_trace,
2738 .type = VLIB_NODE_TYPE_INTERNAL,
2739 .n_errors = ARRAY_LEN (ip6_hop_by_hop_error_strings),
2740 .error_strings = ip6_hop_by_hop_error_strings,
2745 static clib_error_t *
2746 ip6_hop_by_hop_init (vlib_main_t * vm)
2748 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2749 clib_memset (hm->options, 0, sizeof (hm->options));
2750 clib_memset (hm->trace, 0, sizeof (hm->trace));
2751 hm->next_override = IP6_LOOKUP_NEXT_POP_HOP_BY_HOP;
2755 VLIB_INIT_FUNCTION (ip6_hop_by_hop_init);
2757 #ifndef CLIB_MARCH_VARIANT
2759 ip6_hbh_set_next_override (uword next)
2761 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2763 hm->next_override = next;
2767 ip6_hbh_register_option (u8 option,
2768 int options (vlib_buffer_t * b, ip6_header_t * ip,
2769 ip6_hop_by_hop_option_t * opt),
2770 u8 * trace (u8 * s, ip6_hop_by_hop_option_t * opt))
2772 ip6_main_t *im = &ip6_main;
2773 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2775 ASSERT ((u32) option < ARRAY_LEN (hm->options));
2777 /* Already registered */
2778 if (hm->options[option])
2781 hm->options[option] = options;
2782 hm->trace[option] = trace;
2784 /* Set global variable */
2785 im->hbh_enabled = 1;
2791 ip6_hbh_unregister_option (u8 option)
2793 ip6_main_t *im = &ip6_main;
2794 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2796 ASSERT ((u32) option < ARRAY_LEN (hm->options));
2798 /* Not registered */
2799 if (!hm->options[option])
2802 hm->options[option] = NULL;
2803 hm->trace[option] = NULL;
2805 /* Disable global knob if this was the last option configured */
2808 for (i = 0; i < 256; i++)
2810 if (hm->options[option])
2817 im->hbh_enabled = 0;
2822 /* Global IP6 main. */
2823 ip6_main_t ip6_main;
2826 static clib_error_t *
2827 ip6_lookup_init (vlib_main_t * vm)
2829 ip6_main_t *im = &ip6_main;
2830 clib_error_t *error;
2833 if ((error = vlib_call_init_function (vm, vnet_feature_init)))
2836 for (i = 0; i < ARRAY_LEN (im->fib_masks); i++)
2843 for (j = 0; j < i0; j++)
2844 im->fib_masks[i].as_u32[j] = ~0;
2847 im->fib_masks[i].as_u32[i0] =
2848 clib_host_to_net_u32 (pow2_mask (i1) << (32 - i1));
2851 ip_lookup_init (&im->lookup_main, /* is_ip6 */ 1);
2853 /* Create FIB with index 0 and table id of 0. */
2854 fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6, 0,
2855 FIB_SOURCE_DEFAULT_ROUTE);
2856 mfib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6, 0,
2857 MFIB_SOURCE_DEFAULT_ROUTE);
2861 pn = pg_get_node (ip6_lookup_node.index);
2862 pn->unformat_edit = unformat_pg_ip6_header;
2865 /* Unless explicitly configured, don't process HBH options */
2866 im->hbh_enabled = 0;
2871 VLIB_INIT_FUNCTION (ip6_lookup_init);
2873 static clib_error_t *
2874 set_ip6_flow_hash_command_fn (vlib_main_t * vm,
2875 unformat_input_t * input,
2876 vlib_cli_command_t * cmd)
2880 u32 flow_hash_config = 0;
2883 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
2885 if (unformat (input, "table %d", &table_id))
2887 #define _(a, b, v) \
2888 else if (unformat (input, #a)) \
2890 flow_hash_config |= v; \
2893 foreach_flow_hash_bit
2900 return clib_error_return (0, "unknown input `%U'",
2901 format_unformat_error, input);
2903 rv = ip_flow_hash_set (AF_IP6, table_id, flow_hash_config);
2910 return clib_error_return (0, "no such FIB table %d", table_id);
2913 clib_warning ("BUG: illegal flow hash config 0x%x", flow_hash_config);
2921 * Configure the set of IPv6 fields used by the flow hash.
2925 * Example of how to set the flow hash on a given table:
2926 * @cliexcmd{set ip6 flow-hash table 8 dst sport dport proto}
2928 * Example of display the configured flow hash:
2929 * @cliexstart{show ip6 fib}
2930 * ipv6-VRF:0, fib_index 0, flow hash: src dst sport dport proto
2933 * [@0]: dpo-load-balance: [index:5 buckets:1 uRPF:5 to:[0:0]]
2934 * [0] [@0]: dpo-drop ip6
2937 * [@0]: dpo-load-balance: [index:10 buckets:1 uRPF:10 to:[0:0]]
2938 * [0] [@2]: dpo-receive
2941 * [@0]: dpo-load-balance: [index:8 buckets:1 uRPF:8 to:[0:0]]
2942 * [0] [@2]: dpo-receive
2945 * [@0]: dpo-load-balance: [index:7 buckets:1 uRPF:7 to:[0:0]]
2946 * [0] [@2]: dpo-receive
2949 * [@0]: dpo-load-balance: [index:9 buckets:1 uRPF:9 to:[0:0]]
2950 * [0] [@2]: dpo-receive
2951 * ff02::1:ff00:0/104
2953 * [@0]: dpo-load-balance: [index:6 buckets:1 uRPF:6 to:[0:0]]
2954 * [0] [@2]: dpo-receive
2955 * ipv6-VRF:8, fib_index 1, flow hash: dst sport dport proto
2958 * [@0]: dpo-load-balance: [index:21 buckets:1 uRPF:20 to:[0:0]]
2959 * [0] [@0]: dpo-drop ip6
2962 * [@0]: dpo-load-balance: [index:27 buckets:1 uRPF:26 to:[0:0]]
2963 * [0] [@4]: ipv6-glean: af_packet0
2966 * [@0]: dpo-load-balance: [index:28 buckets:1 uRPF:27 to:[0:0]]
2967 * [0] [@2]: dpo-receive: @::a:1:1:0:7 on af_packet0
2970 * [@0]: dpo-load-balance: [index:26 buckets:1 uRPF:25 to:[0:0]]
2971 * [0] [@2]: dpo-receive
2972 * fe80::fe:3eff:fe3e:9222/128
2974 * [@0]: dpo-load-balance: [index:29 buckets:1 uRPF:28 to:[0:0]]
2975 * [0] [@2]: dpo-receive: fe80::fe:3eff:fe3e:9222 on af_packet0
2978 * [@0]: dpo-load-balance: [index:24 buckets:1 uRPF:23 to:[0:0]]
2979 * [0] [@2]: dpo-receive
2982 * [@0]: dpo-load-balance: [index:23 buckets:1 uRPF:22 to:[0:0]]
2983 * [0] [@2]: dpo-receive
2986 * [@0]: dpo-load-balance: [index:25 buckets:1 uRPF:24 to:[0:0]]
2987 * [0] [@2]: dpo-receive
2988 * ff02::1:ff00:0/104
2990 * [@0]: dpo-load-balance: [index:22 buckets:1 uRPF:21 to:[0:0]]
2991 * [0] [@2]: dpo-receive
2996 VLIB_CLI_COMMAND (set_ip6_flow_hash_command, static) = {
2997 .path = "set ip6 flow-hash",
2998 .short_help = "set ip6 flow-hash table <table-id> [src] [dst] [sport] "
2999 "[dport] [proto] [reverse] [flowlabel]",
3000 .function = set_ip6_flow_hash_command_fn,
3004 static clib_error_t *
3005 show_ip6_local_command_fn (vlib_main_t * vm,
3006 unformat_input_t * input, vlib_cli_command_t * cmd)
3008 ip6_main_t *im = &ip6_main;
3009 ip_lookup_main_t *lm = &im->lookup_main;
3012 vlib_cli_output (vm, "Protocols handled by ip6_local");
3013 for (i = 0; i < ARRAY_LEN (lm->local_next_by_ip_protocol); i++)
3015 if (lm->local_next_by_ip_protocol[i] != IP_LOCAL_NEXT_PUNT)
3018 u32 node_index = vlib_get_node (vm,
3019 ip6_local_node.index)->
3020 next_nodes[lm->local_next_by_ip_protocol[i]];
3021 vlib_cli_output (vm, "%d: %U", i, format_vlib_node_name, vm,
3031 * Display the set of protocols handled by the local IPv6 stack.
3034 * Example of how to display local protocol table:
3035 * @cliexstart{show ip6 local}
3036 * Protocols handled by ip6_local
3044 VLIB_CLI_COMMAND (show_ip6_local, static) =
3046 .path = "show ip6 local",
3047 .function = show_ip6_local_command_fn,
3048 .short_help = "show ip6 local",
3052 #ifndef CLIB_MARCH_VARIANT
3054 vnet_set_ip6_classify_intfc (vlib_main_t *vm, u32 sw_if_index, u32 table_index)
3056 vnet_main_t *vnm = vnet_get_main ();
3057 vnet_interface_main_t *im = &vnm->interface_main;
3058 ip6_main_t *ipm = &ip6_main;
3059 ip_lookup_main_t *lm = &ipm->lookup_main;
3060 vnet_classify_main_t *cm = &vnet_classify_main;
3061 ip6_address_t *if_addr;
3063 if (pool_is_free_index (im->sw_interfaces, sw_if_index))
3064 return VNET_API_ERROR_NO_MATCHING_INTERFACE;
3066 if (table_index != ~0 && pool_is_free_index (cm->tables, table_index))
3067 return VNET_API_ERROR_NO_SUCH_ENTRY;
3069 vec_validate (lm->classify_table_index_by_sw_if_index, sw_if_index);
3070 lm->classify_table_index_by_sw_if_index[sw_if_index] = table_index;
3072 if_addr = ip6_interface_first_address (ipm, sw_if_index);
3074 if (NULL != if_addr)
3076 fib_prefix_t pfx = {
3078 .fp_proto = FIB_PROTOCOL_IP6,
3079 .fp_addr.ip6 = *if_addr,
3083 fib_index = fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4,
3085 if (table_index != (u32) ~ 0)
3087 dpo_id_t dpo = DPO_INVALID;
3091 classify_dpo_create (DPO_PROTO_IP6, table_index));
3092 fib_table_entry_special_dpo_add (fib_index,
3094 FIB_SOURCE_CLASSIFY,
3095 FIB_ENTRY_FLAG_NONE, &dpo);
3100 fib_table_entry_special_remove (fib_index,
3101 &pfx, FIB_SOURCE_CLASSIFY);
3109 static clib_error_t *
3110 set_ip6_classify_command_fn (vlib_main_t * vm,
3111 unformat_input_t * input,
3112 vlib_cli_command_t * cmd)
3114 u32 table_index = ~0;
3115 int table_index_set = 0;
3116 u32 sw_if_index = ~0;
3119 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
3121 if (unformat (input, "table-index %d", &table_index))
3122 table_index_set = 1;
3123 else if (unformat (input, "intfc %U", unformat_vnet_sw_interface,
3124 vnet_get_main (), &sw_if_index))
3130 if (table_index_set == 0)
3131 return clib_error_return (0, "classify table-index must be specified");
3133 if (sw_if_index == ~0)
3134 return clib_error_return (0, "interface / subif must be specified");
3136 rv = vnet_set_ip6_classify_intfc (vm, sw_if_index, table_index);
3143 case VNET_API_ERROR_NO_MATCHING_INTERFACE:
3144 return clib_error_return (0, "No such interface");
3146 case VNET_API_ERROR_NO_SUCH_ENTRY:
3147 return clib_error_return (0, "No such classifier table");
3153 * Assign a classification table to an interface. The classification
3154 * table is created using the '<em>classify table</em>' and '<em>classify session</em>'
3155 * commands. Once the table is create, use this command to filter packets
3159 * Example of how to assign a classification table to an interface:
3160 * @cliexcmd{set ip6 classify intfc GigabitEthernet2/0/0 table-index 1}
3163 VLIB_CLI_COMMAND (set_ip6_classify_command, static) =
3165 .path = "set ip6 classify",
3167 "set ip6 classify intfc <interface> table-index <classify-idx>",
3168 .function = set_ip6_classify_command_fn,
3173 * fd.io coding-style-patch-verification: ON
3176 * eval: (c-set-style "gnu")