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);
721 if (0 != im6->fib_index_by_sw_if_index[sw_if_index])
722 fib_table_bind (FIB_PROTOCOL_IP6, sw_if_index, 0);
723 if (0 != im6->mfib_index_by_sw_if_index[sw_if_index])
724 mfib_table_bind (FIB_PROTOCOL_IP6, sw_if_index, 0);
726 /* Erase the lookup tables just in case */
727 im6->fib_index_by_sw_if_index[sw_if_index] = ~0;
728 im6->mfib_index_by_sw_if_index[sw_if_index] = ~0;
731 vnet_feature_enable_disable ("ip6-unicast", "ip6-not-enabled", sw_if_index,
734 vnet_feature_enable_disable ("ip6-multicast", "ip6-not-enabled",
735 sw_if_index, is_add, 0, 0);
737 return /* no error */ 0;
740 VNET_SW_INTERFACE_ADD_DEL_FUNCTION (ip6_sw_interface_add_del);
742 VLIB_NODE_FN (ip6_lookup_node) (vlib_main_t * vm,
743 vlib_node_runtime_t * node,
744 vlib_frame_t * frame)
746 return ip6_lookup_inline (vm, node, frame);
749 static u8 *format_ip6_lookup_trace (u8 * s, va_list * args);
752 VLIB_REGISTER_NODE (ip6_lookup_node) =
754 .name = "ip6-lookup",
755 .vector_size = sizeof (u32),
756 .format_trace = format_ip6_lookup_trace,
757 .n_next_nodes = IP6_LOOKUP_N_NEXT,
758 .next_nodes = IP6_LOOKUP_NEXT_NODES,
762 VLIB_NODE_FN (ip6_load_balance_node) (vlib_main_t * vm,
763 vlib_node_runtime_t * node,
764 vlib_frame_t * frame)
766 vlib_combined_counter_main_t *cm = &load_balance_main.lbm_via_counters;
768 u32 thread_index = vm->thread_index;
769 ip6_main_t *im = &ip6_main;
770 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs;
771 u16 nexts[VLIB_FRAME_SIZE], *next;
773 from = vlib_frame_vector_args (frame);
774 n_left = frame->n_vectors;
777 vlib_get_buffers (vm, from, bufs, n_left);
781 const load_balance_t *lb0, *lb1;
782 const ip6_header_t *ip0, *ip1;
783 u32 lbi0, hc0, lbi1, hc1;
784 const dpo_id_t *dpo0, *dpo1;
786 /* Prefetch next iteration. */
788 vlib_prefetch_buffer_header (b[2], STORE);
789 vlib_prefetch_buffer_header (b[3], STORE);
791 CLIB_PREFETCH (b[2]->data, sizeof (ip0[0]), STORE);
792 CLIB_PREFETCH (b[3]->data, sizeof (ip0[0]), STORE);
795 ip0 = vlib_buffer_get_current (b[0]);
796 ip1 = vlib_buffer_get_current (b[1]);
797 lbi0 = vnet_buffer (b[0])->ip.adj_index[VLIB_TX];
798 lbi1 = vnet_buffer (b[1])->ip.adj_index[VLIB_TX];
800 lb0 = load_balance_get (lbi0);
801 lb1 = load_balance_get (lbi1);
804 * this node is for via FIBs we can re-use the hash value from the
805 * to node if present.
806 * We don't want to use the same hash value at each level in the recursion
807 * graph as that would lead to polarisation
811 if (PREDICT_FALSE (lb0->lb_n_buckets > 1))
813 if (PREDICT_TRUE (vnet_buffer (b[0])->ip.flow_hash))
815 hc0 = vnet_buffer (b[0])->ip.flow_hash =
816 vnet_buffer (b[0])->ip.flow_hash >> 1;
820 hc0 = vnet_buffer (b[0])->ip.flow_hash =
821 ip6_compute_flow_hash (ip0, lb0->lb_hash_config);
823 dpo0 = load_balance_get_fwd_bucket
824 (lb0, (hc0 & (lb0->lb_n_buckets_minus_1)));
828 dpo0 = load_balance_get_bucket_i (lb0, 0);
830 if (PREDICT_FALSE (lb1->lb_n_buckets > 1))
832 if (PREDICT_TRUE (vnet_buffer (b[1])->ip.flow_hash))
834 hc1 = vnet_buffer (b[1])->ip.flow_hash =
835 vnet_buffer (b[1])->ip.flow_hash >> 1;
839 hc1 = vnet_buffer (b[1])->ip.flow_hash =
840 ip6_compute_flow_hash (ip1, lb1->lb_hash_config);
842 dpo1 = load_balance_get_fwd_bucket
843 (lb1, (hc1 & (lb1->lb_n_buckets_minus_1)));
847 dpo1 = load_balance_get_bucket_i (lb1, 0);
850 next[0] = dpo0->dpoi_next_node;
851 next[1] = dpo1->dpoi_next_node;
853 /* Only process the HBH Option Header if explicitly configured to do so */
854 if (PREDICT_FALSE (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
856 next[0] = (dpo_is_adj (dpo0) && im->hbh_enabled) ?
857 (ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next[0];
859 /* Only process the HBH Option Header if explicitly configured to do so */
860 if (PREDICT_FALSE (ip1->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
862 next[1] = (dpo_is_adj (dpo1) && im->hbh_enabled) ?
863 (ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next[1];
866 vnet_buffer (b[0])->ip.adj_index[VLIB_TX] = dpo0->dpoi_index;
867 vnet_buffer (b[1])->ip.adj_index[VLIB_TX] = dpo1->dpoi_index;
869 vlib_increment_combined_counter
870 (cm, thread_index, lbi0, 1, vlib_buffer_length_in_chain (vm, b[0]));
871 vlib_increment_combined_counter
872 (cm, thread_index, lbi1, 1, vlib_buffer_length_in_chain (vm, b[1]));
881 const load_balance_t *lb0;
882 const ip6_header_t *ip0;
883 const dpo_id_t *dpo0;
886 ip0 = vlib_buffer_get_current (b[0]);
887 lbi0 = vnet_buffer (b[0])->ip.adj_index[VLIB_TX];
889 lb0 = load_balance_get (lbi0);
892 if (PREDICT_FALSE (lb0->lb_n_buckets > 1))
894 if (PREDICT_TRUE (vnet_buffer (b[0])->ip.flow_hash))
896 hc0 = vnet_buffer (b[0])->ip.flow_hash =
897 vnet_buffer (b[0])->ip.flow_hash >> 1;
901 hc0 = vnet_buffer (b[0])->ip.flow_hash =
902 ip6_compute_flow_hash (ip0, lb0->lb_hash_config);
904 dpo0 = load_balance_get_fwd_bucket
905 (lb0, (hc0 & (lb0->lb_n_buckets_minus_1)));
909 dpo0 = load_balance_get_bucket_i (lb0, 0);
912 next[0] = dpo0->dpoi_next_node;
913 vnet_buffer (b[0])->ip.adj_index[VLIB_TX] = dpo0->dpoi_index;
915 /* Only process the HBH Option Header if explicitly configured to do so */
916 if (PREDICT_FALSE (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
918 next[0] = (dpo_is_adj (dpo0) && im->hbh_enabled) ?
919 (ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next[0];
922 vlib_increment_combined_counter
923 (cm, thread_index, lbi0, 1, vlib_buffer_length_in_chain (vm, b[0]));
930 vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors);
932 if (node->flags & VLIB_NODE_FLAG_TRACE)
933 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
935 return frame->n_vectors;
939 VLIB_REGISTER_NODE (ip6_load_balance_node) =
941 .name = "ip6-load-balance",
942 .vector_size = sizeof (u32),
943 .sibling_of = "ip6-lookup",
944 .format_trace = format_ip6_lookup_trace,
950 /* Adjacency taken. */
955 /* Packet data, possibly *after* rewrite. */
956 u8 packet_data[128 - 1 * sizeof (u32)];
958 ip6_forward_next_trace_t;
960 #ifndef CLIB_MARCH_VARIANT
962 format_ip6_forward_next_trace (u8 * s, va_list * args)
964 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
965 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
966 ip6_forward_next_trace_t *t = va_arg (*args, ip6_forward_next_trace_t *);
967 u32 indent = format_get_indent (s);
969 s = format (s, "%Ufib:%d adj:%d flow:%d",
970 format_white_space, indent,
971 t->fib_index, t->adj_index, t->flow_hash);
972 s = format (s, "\n%U%U",
973 format_white_space, indent,
974 format_ip6_header, t->packet_data, sizeof (t->packet_data));
980 format_ip6_lookup_trace (u8 * s, va_list * args)
982 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
983 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
984 ip6_forward_next_trace_t *t = va_arg (*args, ip6_forward_next_trace_t *);
985 u32 indent = format_get_indent (s);
987 s = format (s, "fib %d dpo-idx %d flow hash: 0x%08x",
988 t->fib_index, t->adj_index, t->flow_hash);
989 s = format (s, "\n%U%U",
990 format_white_space, indent,
991 format_ip6_header, t->packet_data, sizeof (t->packet_data));
997 format_ip6_rewrite_trace (u8 * s, va_list * args)
999 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
1000 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
1001 ip6_forward_next_trace_t *t = va_arg (*args, ip6_forward_next_trace_t *);
1002 u32 indent = format_get_indent (s);
1004 s = format (s, "tx_sw_if_index %d adj-idx %d : %U flow hash: 0x%08x",
1005 t->fib_index, t->adj_index, format_ip_adjacency,
1006 t->adj_index, FORMAT_IP_ADJACENCY_NONE, t->flow_hash);
1007 s = format (s, "\n%U%U",
1008 format_white_space, indent,
1009 format_ip_adjacency_packet_data,
1010 t->packet_data, sizeof (t->packet_data));
1014 /* Common trace function for all ip6-forward next nodes. */
1015 #ifndef CLIB_MARCH_VARIANT
1017 ip6_forward_next_trace (vlib_main_t * vm,
1018 vlib_node_runtime_t * node,
1019 vlib_frame_t * frame, vlib_rx_or_tx_t which_adj_index)
1022 ip6_main_t *im = &ip6_main;
1024 n_left = frame->n_vectors;
1025 from = vlib_frame_vector_args (frame);
1030 vlib_buffer_t *b0, *b1;
1031 ip6_forward_next_trace_t *t0, *t1;
1033 /* Prefetch next iteration. */
1034 vlib_prefetch_buffer_with_index (vm, from[2], LOAD);
1035 vlib_prefetch_buffer_with_index (vm, from[3], LOAD);
1040 b0 = vlib_get_buffer (vm, bi0);
1041 b1 = vlib_get_buffer (vm, bi1);
1043 if (b0->flags & VLIB_BUFFER_IS_TRACED)
1045 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
1046 t0->adj_index = vnet_buffer (b0)->ip.adj_index[which_adj_index];
1047 t0->flow_hash = vnet_buffer (b0)->ip.flow_hash;
1049 (vnet_buffer (b0)->sw_if_index[VLIB_TX] !=
1050 (u32) ~ 0) ? vnet_buffer (b0)->sw_if_index[VLIB_TX] :
1051 vec_elt (im->fib_index_by_sw_if_index,
1052 vnet_buffer (b0)->sw_if_index[VLIB_RX]);
1054 clib_memcpy_fast (t0->packet_data,
1055 vlib_buffer_get_current (b0),
1056 sizeof (t0->packet_data));
1058 if (b1->flags & VLIB_BUFFER_IS_TRACED)
1060 t1 = vlib_add_trace (vm, node, b1, sizeof (t1[0]));
1061 t1->adj_index = vnet_buffer (b1)->ip.adj_index[which_adj_index];
1062 t1->flow_hash = vnet_buffer (b1)->ip.flow_hash;
1064 (vnet_buffer (b1)->sw_if_index[VLIB_TX] !=
1065 (u32) ~ 0) ? vnet_buffer (b1)->sw_if_index[VLIB_TX] :
1066 vec_elt (im->fib_index_by_sw_if_index,
1067 vnet_buffer (b1)->sw_if_index[VLIB_RX]);
1069 clib_memcpy_fast (t1->packet_data,
1070 vlib_buffer_get_current (b1),
1071 sizeof (t1->packet_data));
1081 ip6_forward_next_trace_t *t0;
1085 b0 = vlib_get_buffer (vm, bi0);
1087 if (b0->flags & VLIB_BUFFER_IS_TRACED)
1089 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
1090 t0->adj_index = vnet_buffer (b0)->ip.adj_index[which_adj_index];
1091 t0->flow_hash = vnet_buffer (b0)->ip.flow_hash;
1093 (vnet_buffer (b0)->sw_if_index[VLIB_TX] !=
1094 (u32) ~ 0) ? vnet_buffer (b0)->sw_if_index[VLIB_TX] :
1095 vec_elt (im->fib_index_by_sw_if_index,
1096 vnet_buffer (b0)->sw_if_index[VLIB_RX]);
1098 clib_memcpy_fast (t0->packet_data,
1099 vlib_buffer_get_current (b0),
1100 sizeof (t0->packet_data));
1107 /* Compute TCP/UDP/ICMP6 checksum in software. */
1109 ip6_tcp_udp_icmp_compute_checksum (vlib_main_t * vm, vlib_buffer_t * p0,
1110 ip6_header_t * ip0, int *bogus_lengthp)
1113 u16 payload_length, payload_length_host_byte_order;
1115 u32 headers_size = sizeof (ip0[0]);
1116 u8 *data_this_buffer;
1117 u8 next_hdr = ip0->protocol;
1119 ASSERT (bogus_lengthp);
1122 payload_length_host_byte_order = clib_net_to_host_u16 (ip0->payload_length);
1123 data_this_buffer = (u8 *) (ip0 + 1);
1124 payload_length = ip0->payload_length;
1126 /* some icmp packets may come with a "router alert" hop-by-hop extension header (e.g., mldv2 packets)
1127 * or UDP-Ping packets */
1128 if (PREDICT_FALSE (next_hdr == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
1131 ip6_hop_by_hop_ext_t *ext_hdr =
1132 (ip6_hop_by_hop_ext_t *) data_this_buffer;
1134 /* validate really icmp6 next */
1135 ASSERT ((ext_hdr->next_hdr == IP_PROTOCOL_ICMP6)
1136 || (ext_hdr->next_hdr == IP_PROTOCOL_UDP));
1138 skip_bytes = 8 * (1 + ext_hdr->n_data_u64s);
1139 data_this_buffer = (void *) ((u8 *) data_this_buffer + skip_bytes);
1141 payload_length_host_byte_order -= skip_bytes;
1142 headers_size += skip_bytes;
1144 /* pseudo-header adjustments:
1145 * exclude ext header bytes from payload length
1146 * use payload IP proto rather than ext header IP proto
1148 payload_length = clib_host_to_net_u16 (payload_length_host_byte_order);
1149 next_hdr = ext_hdr->next_hdr;
1152 /* Initialize checksum with ip pseudo-header. */
1153 sum0 = payload_length + clib_host_to_net_u16 (next_hdr);
1155 for (i = 0; i < ARRAY_LEN (ip0->src_address.as_uword); i++)
1157 sum0 = ip_csum_with_carry
1158 (sum0, clib_mem_unaligned (&ip0->src_address.as_uword[i], uword));
1159 sum0 = ip_csum_with_carry
1160 (sum0, clib_mem_unaligned (&ip0->dst_address.as_uword[i], uword));
1164 return ip_calculate_l4_checksum (vm, p0, sum0,
1165 payload_length_host_byte_order,
1166 (u8 *) ip0, headers_size, NULL);
1168 return ip_calculate_l4_checksum (vm, 0, sum0,
1169 payload_length_host_byte_order, NULL, 0,
1174 ip6_tcp_udp_icmp_validate_checksum (vlib_main_t * vm, vlib_buffer_t * p0)
1176 ip6_header_t *ip0 = vlib_buffer_get_current (p0);
1181 /* some icmp packets may come with a "router alert" hop-by-hop extension header (e.g., mldv2 packets) */
1182 ASSERT (ip0->protocol == IP_PROTOCOL_TCP
1183 || ip0->protocol == IP_PROTOCOL_ICMP6
1184 || ip0->protocol == IP_PROTOCOL_UDP
1185 || ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS);
1187 udp0 = (void *) (ip0 + 1);
1188 if (ip0->protocol == IP_PROTOCOL_UDP && udp0->checksum == 0)
1190 p0->flags |= (VNET_BUFFER_F_L4_CHECKSUM_COMPUTED
1191 | VNET_BUFFER_F_L4_CHECKSUM_CORRECT);
1195 sum16 = ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip0, &bogus_length);
1197 p0->flags |= (VNET_BUFFER_F_L4_CHECKSUM_COMPUTED
1198 | ((sum16 == 0) << VNET_BUFFER_F_LOG2_L4_CHECKSUM_CORRECT));
1205 * @brief returns number of links on which src is reachable.
1208 ip6_urpf_loose_check (ip6_main_t * im, vlib_buffer_t * b, ip6_header_t * i)
1210 const load_balance_t *lb0;
1214 fib_index = vec_elt (im->fib_index_by_sw_if_index,
1215 vnet_buffer (b)->sw_if_index[VLIB_RX]);
1217 (vnet_buffer (b)->sw_if_index[VLIB_TX] == (u32) ~ 0) ?
1218 fib_index : vnet_buffer (b)->sw_if_index[VLIB_TX];
1220 lbi = ip6_fib_table_fwding_lookup (fib_index, &i->src_address);
1221 lb0 = load_balance_get (lbi);
1223 return (fib_urpf_check_size (lb0->lb_urpf));
1227 ip6_next_proto_is_tcp_udp (vlib_buffer_t * p0, ip6_header_t * ip0,
1230 int nh = ip6_locate_header (p0, ip0, -1, udp_offset0);
1232 if (nh == IP_PROTOCOL_UDP || nh == IP_PROTOCOL_TCP)
1238 VNET_FEATURE_ARC_INIT (ip6_local) = {
1239 .arc_name = "ip6-local",
1240 .start_nodes = VNET_FEATURES ("ip6-local", "ip6-receive"),
1244 static_always_inline u8
1245 ip6_tcp_udp_icmp_bad_length (vlib_main_t * vm, vlib_buffer_t * p0)
1248 u16 payload_length_host_byte_order;
1249 u32 n_this_buffer, n_bytes_left;
1250 ip6_header_t *ip0 = vlib_buffer_get_current (p0);
1251 u32 headers_size = sizeof (ip0[0]);
1252 u8 *data_this_buffer;
1255 data_this_buffer = (u8 *) (ip0 + 1);
1257 ip6_hop_by_hop_ext_t *ext_hdr = (ip6_hop_by_hop_ext_t *) data_this_buffer;
1259 /* validate really icmp6 next */
1261 if (!(ext_hdr->next_hdr == IP_PROTOCOL_ICMP6)
1262 || (ext_hdr->next_hdr == IP_PROTOCOL_UDP))
1266 payload_length_host_byte_order = clib_net_to_host_u16 (ip0->payload_length);
1267 n_bytes_left = n_this_buffer = payload_length_host_byte_order;
1270 u32 n_ip_bytes_this_buffer =
1271 p0->current_length - (((u8 *) ip0 - p0->data) - p0->current_data);
1272 if (n_this_buffer + headers_size > n_ip_bytes_this_buffer)
1274 n_this_buffer = p0->current_length > headers_size ?
1275 n_ip_bytes_this_buffer - headers_size : 0;
1278 n_bytes_left -= n_this_buffer;
1279 n_bytes_left -= vlib_buffer_length_in_chain (vm, p0) - p0->current_length;
1281 if (n_bytes_left == 0)
1288 ip6_local_inline (vlib_main_t *vm, vlib_node_runtime_t *node,
1289 vlib_frame_t *frame, int head_of_feature_arc,
1292 ip6_main_t *im = &ip6_main;
1293 ip_lookup_main_t *lm = &im->lookup_main;
1294 u32 *from, n_left_from;
1295 vlib_node_runtime_t *error_node =
1296 vlib_node_get_runtime (vm, ip6_input_node.index);
1297 u8 arc_index = vnet_feat_arc_ip6_local.feature_arc_index;
1298 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
1299 u16 nexts[VLIB_FRAME_SIZE], *next;
1301 from = vlib_frame_vector_args (frame);
1302 n_left_from = frame->n_vectors;
1304 if (node->flags & VLIB_NODE_FLAG_TRACE)
1305 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
1307 vlib_get_buffers (vm, from, bufs, n_left_from);
1311 while (n_left_from > 2)
1313 /* Prefetch next iteration. */
1314 if (n_left_from >= 6)
1316 vlib_prefetch_buffer_header (b[4], STORE);
1317 vlib_prefetch_buffer_header (b[5], STORE);
1318 vlib_prefetch_buffer_data (b[2], LOAD);
1319 vlib_prefetch_buffer_data (b[3], LOAD);
1322 vl_counter_ip6_enum_t error[2];
1323 error[0] = IP6_ERROR_UNKNOWN_PROTOCOL;
1324 error[1] = IP6_ERROR_UNKNOWN_PROTOCOL;
1326 ip6_header_t *ip[2];
1327 ip[0] = vlib_buffer_get_current (b[0]);
1328 ip[1] = vlib_buffer_get_current (b[1]);
1330 if (head_of_feature_arc)
1332 vnet_buffer (b[0])->l3_hdr_offset = b[0]->current_data;
1333 vnet_buffer (b[1])->l3_hdr_offset = b[1]->current_data;
1336 type[0] = lm->builtin_protocol_by_ip_protocol[ip[0]->protocol];
1337 type[1] = lm->builtin_protocol_by_ip_protocol[ip[1]->protocol];
1340 flags[0] = b[0]->flags;
1341 flags[1] = b[1]->flags;
1343 vnet_buffer_oflags_t oflags[2];
1344 oflags[0] = vnet_buffer (b[0])->oflags;
1345 oflags[1] = vnet_buffer (b[1])->oflags;
1348 l4_offload[0] = (flags[0] & VNET_BUFFER_F_OFFLOAD) &&
1349 (oflags[0] & (VNET_BUFFER_OFFLOAD_F_TCP_CKSUM |
1350 VNET_BUFFER_OFFLOAD_F_UDP_CKSUM));
1351 l4_offload[1] = (flags[1] & VNET_BUFFER_F_OFFLOAD) &&
1352 (oflags[1] & (VNET_BUFFER_OFFLOAD_F_TCP_CKSUM |
1353 VNET_BUFFER_OFFLOAD_F_UDP_CKSUM));
1355 u32 good_l4_csum[2];
1357 (flags[0] & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) | l4_offload[0];
1359 (flags[1] & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) | l4_offload[1];
1361 u32 udp_offset[2] = { };
1364 ip6_next_proto_is_tcp_udp (b[0], ip[0], &udp_offset[0]);
1366 ip6_next_proto_is_tcp_udp (b[1], ip[1], &udp_offset[1]);
1367 i16 len_diff[2] = { 0 };
1368 if (PREDICT_TRUE (is_tcp_udp[0]))
1371 (udp_header_t *) ((u8 *) ip[0] + udp_offset[0]);
1372 good_l4_csum[0] |= type[0] == IP_BUILTIN_PROTOCOL_UDP
1373 && udp->checksum == 0;
1374 /* optimistically verify UDP length. */
1375 u16 ip_len, udp_len;
1376 ip_len = clib_net_to_host_u16 (ip[0]->payload_length);
1377 udp_len = clib_net_to_host_u16 (udp->length);
1378 len_diff[0] = ip_len - udp_len;
1380 if (PREDICT_TRUE (is_tcp_udp[1]))
1383 (udp_header_t *) ((u8 *) ip[1] + udp_offset[1]);
1384 good_l4_csum[1] |= type[1] == IP_BUILTIN_PROTOCOL_UDP
1385 && udp->checksum == 0;
1386 /* optimistically verify UDP length. */
1387 u16 ip_len, udp_len;
1388 ip_len = clib_net_to_host_u16 (ip[1]->payload_length);
1389 udp_len = clib_net_to_host_u16 (udp->length);
1390 len_diff[1] = ip_len - udp_len;
1393 good_l4_csum[0] |= type[0] == IP_BUILTIN_PROTOCOL_UNKNOWN;
1394 good_l4_csum[1] |= type[1] == IP_BUILTIN_PROTOCOL_UNKNOWN;
1396 len_diff[0] = type[0] == IP_BUILTIN_PROTOCOL_UDP ? len_diff[0] : 0;
1397 len_diff[1] = type[1] == IP_BUILTIN_PROTOCOL_UDP ? len_diff[1] : 0;
1400 need_csum[0] = type[0] != IP_BUILTIN_PROTOCOL_UNKNOWN
1402 && !(flags[0] & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED);
1403 need_csum[1] = type[1] != IP_BUILTIN_PROTOCOL_UNKNOWN
1405 && !(flags[1] & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED);
1406 if (PREDICT_FALSE (need_csum[0]))
1408 flags[0] = ip6_tcp_udp_icmp_validate_checksum (vm, b[0]);
1409 good_l4_csum[0] = flags[0] & VNET_BUFFER_F_L4_CHECKSUM_CORRECT;
1410 error[0] = IP6_ERROR_UNKNOWN_PROTOCOL;
1414 if (ip6_tcp_udp_icmp_bad_length (vm, b[0]))
1415 error[0] = IP6_ERROR_BAD_LENGTH;
1417 if (PREDICT_FALSE (need_csum[1]))
1419 flags[1] = ip6_tcp_udp_icmp_validate_checksum (vm, b[1]);
1420 good_l4_csum[1] = flags[1] & VNET_BUFFER_F_L4_CHECKSUM_CORRECT;
1421 error[1] = IP6_ERROR_UNKNOWN_PROTOCOL;
1425 if (ip6_tcp_udp_icmp_bad_length (vm, b[1]))
1426 error[1] = IP6_ERROR_BAD_LENGTH;
1430 error[0] = len_diff[0] < 0 ? IP6_ERROR_UDP_LENGTH : error[0];
1432 error[1] = len_diff[1] < 0 ? IP6_ERROR_UDP_LENGTH : error[1];
1434 STATIC_ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_UDP ==
1435 IP6_ERROR_UDP_CHECKSUM,
1436 "Wrong IP6 errors constants");
1437 STATIC_ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_ICMP ==
1438 IP6_ERROR_ICMP_CHECKSUM,
1439 "Wrong IP6 errors constants");
1442 !good_l4_csum[0] ? IP6_ERROR_UDP_CHECKSUM + type[0] : error[0];
1444 !good_l4_csum[1] ? IP6_ERROR_UDP_CHECKSUM + type[1] : error[1];
1446 /* Drop packets from unroutable hosts. */
1447 /* If this is a neighbor solicitation (ICMP), skip source RPF check */
1449 unroutable[0] = error[0] == IP6_ERROR_UNKNOWN_PROTOCOL
1450 && type[0] != IP_BUILTIN_PROTOCOL_ICMP
1451 && !ip6_address_is_link_local_unicast (&ip[0]->src_address);
1452 unroutable[1] = error[1] == IP6_ERROR_UNKNOWN_PROTOCOL
1453 && type[1] != IP_BUILTIN_PROTOCOL_ICMP
1454 && !ip6_address_is_link_local_unicast (&ip[1]->src_address);
1455 if (PREDICT_FALSE (unroutable[0]))
1458 !ip6_urpf_loose_check (im, b[0],
1459 ip[0]) ? IP6_ERROR_SRC_LOOKUP_MISS
1462 if (PREDICT_FALSE (unroutable[1]))
1465 !ip6_urpf_loose_check (im, b[1],
1466 ip[1]) ? IP6_ERROR_SRC_LOOKUP_MISS
1470 vnet_buffer (b[0])->ip.fib_index =
1471 vnet_buffer (b[0])->sw_if_index[VLIB_TX] != ~0 ?
1472 vnet_buffer (b[0])->sw_if_index[VLIB_TX] :
1473 vnet_buffer (b[0])->ip.fib_index;
1474 vnet_buffer (b[1])->ip.fib_index =
1475 vnet_buffer (b[1])->sw_if_index[VLIB_TX] != ~0 ?
1476 vnet_buffer (b[1])->sw_if_index[VLIB_TX] :
1477 vnet_buffer (b[1])->ip.fib_index;
1479 vnet_buffer (b[0])->ip.rx_sw_if_index =
1480 vnet_buffer (b[0])->sw_if_index[VLIB_RX];
1481 vnet_buffer (b[1])->ip.rx_sw_if_index =
1482 vnet_buffer (b[1])->sw_if_index[VLIB_RX];
1485 const receive_dpo_t *rd0, *rd1;
1487 receive_dpo_get (vnet_buffer (b[0])->ip.adj_index[VLIB_TX]);
1489 receive_dpo_get (vnet_buffer (b[1])->ip.adj_index[VLIB_TX]);
1490 if (rd0->rd_sw_if_index != ~0)
1491 vnet_buffer (b[0])->ip.rx_sw_if_index = rd0->rd_sw_if_index;
1492 if (rd1->rd_sw_if_index != ~0)
1493 vnet_buffer (b[1])->ip.rx_sw_if_index = rd1->rd_sw_if_index;
1495 } /* head_of_feature_arc */
1497 next[0] = lm->local_next_by_ip_protocol[ip[0]->protocol];
1499 error[0] != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next[0];
1500 next[1] = lm->local_next_by_ip_protocol[ip[1]->protocol];
1502 error[1] != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next[1];
1504 b[0]->error = error_node->errors[error[0]];
1505 b[1]->error = error_node->errors[error[1]];
1507 if (head_of_feature_arc)
1510 ip6_unknown[0] = error[0] == (u8) IP6_ERROR_UNKNOWN_PROTOCOL;
1511 ip6_unknown[1] = error[1] == (u8) IP6_ERROR_UNKNOWN_PROTOCOL;
1512 if (PREDICT_TRUE (ip6_unknown[0]))
1514 u32 next32 = next[0];
1515 vnet_feature_arc_start (arc_index,
1516 vnet_buffer (b[0])->ip.rx_sw_if_index,
1520 if (PREDICT_TRUE (ip6_unknown[1]))
1522 u32 next32 = next[1];
1523 vnet_feature_arc_start (arc_index,
1524 vnet_buffer (b[1])->ip.rx_sw_if_index,
1539 error = IP6_ERROR_UNKNOWN_PROTOCOL;
1542 ip = vlib_buffer_get_current (b[0]);
1544 if (head_of_feature_arc)
1546 vnet_buffer (b[0])->l3_hdr_offset = b[0]->current_data;
1547 u8 type = lm->builtin_protocol_by_ip_protocol[ip->protocol];
1549 u32 flags = b[0]->flags;
1551 vnet_buffer_oflags_t oflags = vnet_buffer (b[0])->oflags;
1553 u32 l4_offload = (flags & VNET_BUFFER_F_OFFLOAD) &&
1554 (oflags & (VNET_BUFFER_OFFLOAD_F_TCP_CKSUM |
1555 VNET_BUFFER_OFFLOAD_F_UDP_CKSUM));
1558 (flags & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) | l4_offload;
1561 u8 is_tcp_udp = ip6_next_proto_is_tcp_udp (b[0], ip, &udp_offset);
1562 if (PREDICT_TRUE (is_tcp_udp))
1564 udp_header_t *udp = (udp_header_t *) ((u8 *) ip + udp_offset);
1565 /* Don't verify UDP checksum for packets with explicit zero checksum. */
1566 good_l4_csum |= type == IP_BUILTIN_PROTOCOL_UDP
1567 && udp->checksum == 0;
1568 /* optimistically verify UDP length. */
1569 u16 ip_len, udp_len;
1570 ip_len = clib_net_to_host_u16 (ip->payload_length);
1571 udp_len = clib_net_to_host_u16 (udp->length);
1572 len_diff = ip_len - udp_len;
1575 good_l4_csum |= type == IP_BUILTIN_PROTOCOL_UNKNOWN;
1576 len_diff = type == IP_BUILTIN_PROTOCOL_UDP ? len_diff : 0;
1578 u8 need_csum = type != IP_BUILTIN_PROTOCOL_UNKNOWN &&
1580 !(flags & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED);
1581 if (PREDICT_FALSE (need_csum))
1583 flags = ip6_tcp_udp_icmp_validate_checksum (vm, b[0]);
1584 good_l4_csum = flags & VNET_BUFFER_F_L4_CHECKSUM_CORRECT;
1585 error = IP6_ERROR_UNKNOWN_PROTOCOL;
1589 if (ip6_tcp_udp_icmp_bad_length (vm, b[0]))
1590 error = IP6_ERROR_BAD_LENGTH;
1595 error = len_diff < 0 ? IP6_ERROR_UDP_LENGTH : error;
1596 STATIC_ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_UDP ==
1597 IP6_ERROR_UDP_CHECKSUM,
1598 "Wrong IP6 errors constants");
1599 STATIC_ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_ICMP ==
1600 IP6_ERROR_ICMP_CHECKSUM,
1601 "Wrong IP6 errors constants");
1603 error = !good_l4_csum ? IP6_ERROR_UDP_CHECKSUM + type : error;
1605 /* Drop packets from unroutable hosts. */
1606 /* If this is a neighbor solicitation (ICMP), skip source RPF check */
1607 u8 unroutable = error == IP6_ERROR_UNKNOWN_PROTOCOL
1608 && type != IP_BUILTIN_PROTOCOL_ICMP
1609 && !ip6_address_is_link_local_unicast (&ip->src_address);
1610 if (PREDICT_FALSE (unroutable))
1613 !ip6_urpf_loose_check (im, b[0],
1614 ip) ? IP6_ERROR_SRC_LOOKUP_MISS :
1618 vnet_buffer (b[0])->ip.fib_index =
1619 vnet_buffer (b[0])->sw_if_index[VLIB_TX] != ~0 ?
1620 vnet_buffer (b[0])->sw_if_index[VLIB_TX] :
1621 vnet_buffer (b[0])->ip.fib_index;
1623 vnet_buffer (b[0])->ip.rx_sw_if_index =
1624 vnet_buffer (b[0])->sw_if_index[VLIB_RX];
1628 rd = receive_dpo_get (vnet_buffer (b[0])->ip.adj_index[VLIB_TX]);
1629 if (rd->rd_sw_if_index != ~0)
1630 vnet_buffer (b[0])->ip.rx_sw_if_index = rd->rd_sw_if_index;
1632 } /* head_of_feature_arc */
1634 next[0] = lm->local_next_by_ip_protocol[ip->protocol];
1636 error != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next[0];
1638 b[0]->error = error_node->errors[error];
1640 if (head_of_feature_arc)
1642 if (PREDICT_TRUE (error == (u8) IP6_ERROR_UNKNOWN_PROTOCOL))
1644 u32 next32 = next[0];
1645 vnet_feature_arc_start (arc_index,
1646 vnet_buffer (b[0])->ip.rx_sw_if_index,
1658 vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors);
1659 return frame->n_vectors;
1662 VLIB_NODE_FN (ip6_local_node) (vlib_main_t * vm, vlib_node_runtime_t * node,
1663 vlib_frame_t * frame)
1665 return ip6_local_inline (vm, node, frame, 1 /* head of feature arc */,
1666 0 /* ip6_local_inline */);
1669 VLIB_REGISTER_NODE (ip6_local_node) =
1671 .name = "ip6-local",
1672 .vector_size = sizeof (u32),
1673 .format_trace = format_ip6_forward_next_trace,
1674 .n_errors = IP6_N_ERROR,
1675 .error_counters = ip6_error_counters,
1676 .n_next_nodes = IP_LOCAL_N_NEXT,
1679 [IP_LOCAL_NEXT_DROP] = "ip6-drop",
1680 [IP_LOCAL_NEXT_PUNT] = "ip6-punt",
1681 [IP_LOCAL_NEXT_UDP_LOOKUP] = "ip6-udp-lookup",
1682 [IP_LOCAL_NEXT_ICMP] = "ip6-icmp-input",
1683 [IP_LOCAL_NEXT_REASSEMBLY] = "ip6-local-full-reassembly",
1687 VLIB_NODE_FN (ip6_receive_local_node)
1688 (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
1690 return ip6_local_inline (vm, node, frame, 1 /* head of feature arc */,
1691 1 /* is_receive_dpo */);
1694 VLIB_REGISTER_NODE (ip6_receive_local_node) = {
1695 .name = "ip6-receive",
1696 .vector_size = sizeof (u32),
1697 .format_trace = format_ip6_forward_next_trace,
1698 .sibling_of = "ip6-local"
1701 VLIB_NODE_FN (ip6_local_end_of_arc_node) (vlib_main_t * vm,
1702 vlib_node_runtime_t * node,
1703 vlib_frame_t * frame)
1705 return ip6_local_inline (vm, node, frame, 0 /* head of feature arc */,
1706 0 /* ip6_local_inline */);
1709 VLIB_REGISTER_NODE (ip6_local_end_of_arc_node) = {
1710 .name = "ip6-local-end-of-arc",
1711 .vector_size = sizeof (u32),
1713 .format_trace = format_ip6_forward_next_trace,
1714 .sibling_of = "ip6-local",
1717 VNET_FEATURE_INIT (ip6_local_end_of_arc, static) = {
1718 .arc_name = "ip6-local",
1719 .node_name = "ip6-local-end-of-arc",
1720 .runs_before = 0, /* not before any other features */
1723 #ifdef CLIB_MARCH_VARIANT
1724 extern vlib_node_registration_t ip6_local_node;
1727 ip6_register_protocol (u32 protocol, u32 node_index)
1729 vlib_main_t *vm = vlib_get_main ();
1730 ip6_main_t *im = &ip6_main;
1731 ip_lookup_main_t *lm = &im->lookup_main;
1733 ASSERT (protocol < ARRAY_LEN (lm->local_next_by_ip_protocol));
1734 lm->local_next_by_ip_protocol[protocol] =
1735 vlib_node_add_next (vm, ip6_local_node.index, node_index);
1739 ip6_unregister_protocol (u32 protocol)
1741 ip6_main_t *im = &ip6_main;
1742 ip_lookup_main_t *lm = &im->lookup_main;
1744 ASSERT (protocol < ARRAY_LEN (lm->local_next_by_ip_protocol));
1745 lm->local_next_by_ip_protocol[protocol] = IP_LOCAL_NEXT_PUNT;
1751 IP6_REWRITE_NEXT_DROP,
1752 IP6_REWRITE_NEXT_ICMP_ERROR,
1753 IP6_REWRITE_NEXT_FRAGMENT,
1754 IP6_REWRITE_N_NEXT /* Last */
1755 } ip6_rewrite_next_t;
1758 * This bits of an IPv6 address to mask to construct a multicast
1761 #define IP6_MCAST_ADDR_MASK 0xffffffff
1764 ip6_mtu_check (vlib_buffer_t * b, u16 packet_bytes,
1765 u16 adj_packet_bytes, bool is_locally_generated,
1766 u32 * next, u8 is_midchain, u32 * error)
1768 if (adj_packet_bytes >= 1280 && packet_bytes > adj_packet_bytes)
1770 if (is_locally_generated)
1772 /* IP fragmentation */
1773 ip_frag_set_vnet_buffer (b, adj_packet_bytes,
1775 IP_FRAG_NEXT_IP_REWRITE_MIDCHAIN :
1776 IP_FRAG_NEXT_IP_REWRITE), 0);
1777 *next = IP6_REWRITE_NEXT_FRAGMENT;
1778 *error = IP6_ERROR_MTU_EXCEEDED;
1782 *error = IP6_ERROR_MTU_EXCEEDED;
1783 icmp6_error_set_vnet_buffer (b, ICMP6_packet_too_big, 0,
1785 *next = IP6_REWRITE_NEXT_ICMP_ERROR;
1791 ip6_rewrite_inline_with_gso (vlib_main_t * vm,
1792 vlib_node_runtime_t * node,
1793 vlib_frame_t * frame,
1794 int do_counters, int is_midchain, int is_mcast)
1796 ip_lookup_main_t *lm = &ip6_main.lookup_main;
1797 u32 *from = vlib_frame_vector_args (frame);
1798 u32 n_left_from, n_left_to_next, *to_next, next_index;
1799 vlib_node_runtime_t *error_node =
1800 vlib_node_get_runtime (vm, ip6_input_node.index);
1802 n_left_from = frame->n_vectors;
1803 next_index = node->cached_next_index;
1804 u32 thread_index = vm->thread_index;
1806 while (n_left_from > 0)
1808 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1810 while (n_left_from >= 4 && n_left_to_next >= 2)
1812 const ip_adjacency_t *adj0, *adj1;
1813 vlib_buffer_t *p0, *p1;
1814 ip6_header_t *ip0, *ip1;
1815 u32 pi0, rw_len0, next0, error0, adj_index0;
1816 u32 pi1, rw_len1, next1, error1, adj_index1;
1817 u32 tx_sw_if_index0, tx_sw_if_index1;
1818 bool is_locally_originated0, is_locally_originated1;
1820 /* Prefetch next iteration. */
1822 vlib_buffer_t *p2, *p3;
1824 p2 = vlib_get_buffer (vm, from[2]);
1825 p3 = vlib_get_buffer (vm, from[3]);
1827 vlib_prefetch_buffer_header (p2, LOAD);
1828 vlib_prefetch_buffer_header (p3, LOAD);
1830 clib_prefetch_store (p2->pre_data);
1831 clib_prefetch_store (p3->pre_data);
1833 CLIB_PREFETCH (p2->data, sizeof (ip0[0]), STORE);
1834 CLIB_PREFETCH (p3->data, sizeof (ip0[0]), STORE);
1837 pi0 = to_next[0] = from[0];
1838 pi1 = to_next[1] = from[1];
1843 n_left_to_next -= 2;
1845 p0 = vlib_get_buffer (vm, pi0);
1846 p1 = vlib_get_buffer (vm, pi1);
1848 adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
1849 adj_index1 = vnet_buffer (p1)->ip.adj_index[VLIB_TX];
1851 ip0 = vlib_buffer_get_current (p0);
1852 ip1 = vlib_buffer_get_current (p1);
1854 error0 = error1 = IP6_ERROR_NONE;
1855 next0 = next1 = IP6_REWRITE_NEXT_DROP;
1857 is_locally_originated0 =
1858 p0->flags & VNET_BUFFER_F_LOCALLY_ORIGINATED;
1859 if (PREDICT_TRUE (!is_locally_originated0))
1861 i32 hop_limit0 = ip0->hop_limit;
1863 /* Input node should have reject packets with hop limit 0. */
1864 ASSERT (ip0->hop_limit > 0);
1868 ip0->hop_limit = hop_limit0;
1871 * If the hop count drops below 1 when forwarding, generate
1874 if (PREDICT_FALSE (hop_limit0 <= 0))
1876 error0 = IP6_ERROR_TIME_EXPIRED;
1877 next0 = IP6_REWRITE_NEXT_ICMP_ERROR;
1878 vnet_buffer (p0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
1879 icmp6_error_set_vnet_buffer (p0, ICMP6_time_exceeded,
1880 ICMP6_time_exceeded_ttl_exceeded_in_transit,
1885 is_locally_originated1 =
1886 p1->flags & VNET_BUFFER_F_LOCALLY_ORIGINATED;
1887 if (PREDICT_TRUE (!is_locally_originated1))
1889 i32 hop_limit1 = ip1->hop_limit;
1891 /* Input node should have reject packets with hop limit 0. */
1892 ASSERT (ip1->hop_limit > 0);
1896 ip1->hop_limit = hop_limit1;
1899 * If the hop count drops below 1 when forwarding, generate
1902 if (PREDICT_FALSE (hop_limit1 <= 0))
1904 error1 = IP6_ERROR_TIME_EXPIRED;
1905 next1 = IP6_REWRITE_NEXT_ICMP_ERROR;
1906 vnet_buffer (p1)->sw_if_index[VLIB_TX] = (u32) ~ 0;
1907 icmp6_error_set_vnet_buffer (p1, ICMP6_time_exceeded,
1908 ICMP6_time_exceeded_ttl_exceeded_in_transit,
1913 adj0 = adj_get (adj_index0);
1914 adj1 = adj_get (adj_index1);
1916 rw_len0 = adj0[0].rewrite_header.data_bytes;
1917 rw_len1 = adj1[0].rewrite_header.data_bytes;
1918 vnet_buffer (p0)->ip.save_rewrite_length = rw_len0;
1919 vnet_buffer (p1)->ip.save_rewrite_length = rw_len1;
1923 vlib_increment_combined_counter
1924 (&adjacency_counters,
1925 thread_index, adj_index0, 1,
1926 vlib_buffer_length_in_chain (vm, p0) + rw_len0);
1927 vlib_increment_combined_counter
1928 (&adjacency_counters,
1929 thread_index, adj_index1, 1,
1930 vlib_buffer_length_in_chain (vm, p1) + rw_len1);
1933 /* Check MTU of outgoing interface. */
1935 clib_net_to_host_u16 (ip0->payload_length) +
1936 sizeof (ip6_header_t);
1938 clib_net_to_host_u16 (ip1->payload_length) +
1939 sizeof (ip6_header_t);
1940 if (p0->flags & VNET_BUFFER_F_GSO)
1941 ip0_len = gso_mtu_sz (p0);
1942 if (p1->flags & VNET_BUFFER_F_GSO)
1943 ip1_len = gso_mtu_sz (p1);
1945 ip6_mtu_check (p0, ip0_len,
1946 adj0[0].rewrite_header.max_l3_packet_bytes,
1947 is_locally_originated0, &next0, is_midchain,
1949 ip6_mtu_check (p1, ip1_len,
1950 adj1[0].rewrite_header.max_l3_packet_bytes,
1951 is_locally_originated1, &next1, is_midchain,
1953 /* Don't adjust the buffer for hop count issue; icmp-error node
1954 * wants to see the IP header */
1955 if (PREDICT_TRUE (error0 == IP6_ERROR_NONE))
1957 p0->current_data -= rw_len0;
1958 p0->current_length += rw_len0;
1959 tx_sw_if_index0 = adj0[0].rewrite_header.sw_if_index;
1960 vnet_buffer (p0)->sw_if_index[VLIB_TX] = tx_sw_if_index0;
1961 next0 = adj0[0].rewrite_header.next_index;
1963 (adj0[0].rewrite_header.flags & VNET_REWRITE_HAS_FEATURES))
1964 vnet_feature_arc_start_w_cfg_index
1965 (lm->output_feature_arc_index, tx_sw_if_index0, &next0, p0,
1966 adj0->ia_cfg_index);
1970 p0->error = error_node->errors[error0];
1972 if (PREDICT_TRUE (error1 == IP6_ERROR_NONE))
1974 p1->current_data -= rw_len1;
1975 p1->current_length += rw_len1;
1977 tx_sw_if_index1 = adj1[0].rewrite_header.sw_if_index;
1978 vnet_buffer (p1)->sw_if_index[VLIB_TX] = tx_sw_if_index1;
1979 next1 = adj1[0].rewrite_header.next_index;
1982 (adj1[0].rewrite_header.flags & VNET_REWRITE_HAS_FEATURES))
1983 vnet_feature_arc_start_w_cfg_index
1984 (lm->output_feature_arc_index, tx_sw_if_index1, &next1, p1,
1985 adj1->ia_cfg_index);
1989 p1->error = error_node->errors[error1];
1994 /* before we paint on the next header, update the L4
1995 * checksums if required, since there's no offload on a tunnel */
1996 vnet_calc_checksums_inline (vm, p0, 0 /* is_ip4 */ ,
1998 vnet_calc_checksums_inline (vm, p1, 0 /* is_ip4 */ ,
2001 /* Guess we are only writing on ipv6 header. */
2002 vnet_rewrite_two_headers (adj0[0], adj1[0],
2003 ip0, ip1, sizeof (ip6_header_t));
2006 /* Guess we are only writing on simple Ethernet header. */
2007 vnet_rewrite_two_headers (adj0[0], adj1[0],
2008 ip0, ip1, sizeof (ethernet_header_t));
2012 if (adj0->sub_type.midchain.fixup_func)
2013 adj0->sub_type.midchain.fixup_func
2014 (vm, adj0, p0, adj0->sub_type.midchain.fixup_data);
2015 if (adj1->sub_type.midchain.fixup_func)
2016 adj1->sub_type.midchain.fixup_func
2017 (vm, adj1, p1, adj1->sub_type.midchain.fixup_data);
2022 * copy bytes from the IP address into the MAC rewrite
2024 vnet_ip_mcast_fixup_header (IP6_MCAST_ADDR_MASK,
2026 rewrite_header.dst_mcast_offset,
2027 &ip0->dst_address.as_u32[3],
2029 vnet_ip_mcast_fixup_header (IP6_MCAST_ADDR_MASK,
2031 rewrite_header.dst_mcast_offset,
2032 &ip1->dst_address.as_u32[3],
2036 vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
2037 to_next, n_left_to_next,
2038 pi0, pi1, next0, next1);
2041 while (n_left_from > 0 && n_left_to_next > 0)
2043 ip_adjacency_t *adj0;
2047 u32 adj_index0, next0, error0;
2048 u32 tx_sw_if_index0;
2049 bool is_locally_originated0;
2051 pi0 = to_next[0] = from[0];
2053 p0 = vlib_get_buffer (vm, pi0);
2055 adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
2057 adj0 = adj_get (adj_index0);
2059 ip0 = vlib_buffer_get_current (p0);
2061 error0 = IP6_ERROR_NONE;
2062 next0 = IP6_REWRITE_NEXT_DROP;
2064 /* Check hop limit */
2065 is_locally_originated0 =
2066 p0->flags & VNET_BUFFER_F_LOCALLY_ORIGINATED;
2067 if (PREDICT_TRUE (!is_locally_originated0))
2069 i32 hop_limit0 = ip0->hop_limit;
2071 ASSERT (ip0->hop_limit > 0);
2075 ip0->hop_limit = hop_limit0;
2077 if (PREDICT_FALSE (hop_limit0 <= 0))
2080 * If the hop count drops below 1 when forwarding, generate
2083 error0 = IP6_ERROR_TIME_EXPIRED;
2084 next0 = IP6_REWRITE_NEXT_ICMP_ERROR;
2085 vnet_buffer (p0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
2086 icmp6_error_set_vnet_buffer (p0, ICMP6_time_exceeded,
2087 ICMP6_time_exceeded_ttl_exceeded_in_transit,
2094 vnet_calc_checksums_inline (vm, p0, 0 /* is_ip4 */ ,
2097 /* Guess we are only writing on ip6 header. */
2098 vnet_rewrite_one_header (adj0[0], ip0, sizeof (ip6_header_t));
2101 /* Guess we are only writing on simple Ethernet header. */
2102 vnet_rewrite_one_header (adj0[0], ip0,
2103 sizeof (ethernet_header_t));
2105 /* Update packet buffer attributes/set output interface. */
2106 rw_len0 = adj0[0].rewrite_header.data_bytes;
2107 vnet_buffer (p0)->ip.save_rewrite_length = rw_len0;
2111 vlib_increment_combined_counter
2112 (&adjacency_counters,
2113 thread_index, adj_index0, 1,
2114 vlib_buffer_length_in_chain (vm, p0) + rw_len0);
2117 /* Check MTU of outgoing interface. */
2119 clib_net_to_host_u16 (ip0->payload_length) +
2120 sizeof (ip6_header_t);
2121 if (p0->flags & VNET_BUFFER_F_GSO)
2122 ip0_len = gso_mtu_sz (p0);
2124 ip6_mtu_check (p0, ip0_len,
2125 adj0[0].rewrite_header.max_l3_packet_bytes,
2126 is_locally_originated0, &next0, is_midchain,
2128 /* Don't adjust the buffer for hop count issue; icmp-error node
2129 * wants to see the IP header */
2130 if (PREDICT_TRUE (error0 == IP6_ERROR_NONE))
2132 p0->current_data -= rw_len0;
2133 p0->current_length += rw_len0;
2135 tx_sw_if_index0 = adj0[0].rewrite_header.sw_if_index;
2137 vnet_buffer (p0)->sw_if_index[VLIB_TX] = tx_sw_if_index0;
2138 next0 = adj0[0].rewrite_header.next_index;
2141 (adj0[0].rewrite_header.flags & VNET_REWRITE_HAS_FEATURES))
2142 vnet_feature_arc_start_w_cfg_index
2143 (lm->output_feature_arc_index, tx_sw_if_index0, &next0, p0,
2144 adj0->ia_cfg_index);
2148 p0->error = error_node->errors[error0];
2153 if (adj0->sub_type.midchain.fixup_func)
2154 adj0->sub_type.midchain.fixup_func
2155 (vm, adj0, p0, adj0->sub_type.midchain.fixup_data);
2159 vnet_ip_mcast_fixup_header (IP6_MCAST_ADDR_MASK,
2161 rewrite_header.dst_mcast_offset,
2162 &ip0->dst_address.as_u32[3],
2169 n_left_to_next -= 1;
2171 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
2172 to_next, n_left_to_next,
2176 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2179 /* Need to do trace after rewrites to pick up new packet data. */
2180 if (node->flags & VLIB_NODE_FLAG_TRACE)
2181 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
2183 return frame->n_vectors;
2187 ip6_rewrite_inline (vlib_main_t * vm,
2188 vlib_node_runtime_t * node,
2189 vlib_frame_t * frame,
2190 int do_counters, int is_midchain, int is_mcast)
2192 return ip6_rewrite_inline_with_gso (vm, node, frame, do_counters,
2193 is_midchain, is_mcast);
2196 VLIB_NODE_FN (ip6_rewrite_node) (vlib_main_t * vm,
2197 vlib_node_runtime_t * node,
2198 vlib_frame_t * frame)
2200 if (adj_are_counters_enabled ())
2201 return ip6_rewrite_inline (vm, node, frame, 1, 0, 0);
2203 return ip6_rewrite_inline (vm, node, frame, 0, 0, 0);
2206 VLIB_NODE_FN (ip6_rewrite_bcast_node) (vlib_main_t * vm,
2207 vlib_node_runtime_t * node,
2208 vlib_frame_t * frame)
2210 if (adj_are_counters_enabled ())
2211 return ip6_rewrite_inline (vm, node, frame, 1, 0, 0);
2213 return ip6_rewrite_inline (vm, node, frame, 0, 0, 0);
2216 VLIB_NODE_FN (ip6_rewrite_mcast_node) (vlib_main_t * vm,
2217 vlib_node_runtime_t * node,
2218 vlib_frame_t * frame)
2220 if (adj_are_counters_enabled ())
2221 return ip6_rewrite_inline (vm, node, frame, 1, 0, 1);
2223 return ip6_rewrite_inline (vm, node, frame, 0, 0, 1);
2226 VLIB_NODE_FN (ip6_midchain_node) (vlib_main_t * vm,
2227 vlib_node_runtime_t * node,
2228 vlib_frame_t * frame)
2230 if (adj_are_counters_enabled ())
2231 return ip6_rewrite_inline (vm, node, frame, 1, 1, 0);
2233 return ip6_rewrite_inline (vm, node, frame, 0, 1, 0);
2236 VLIB_NODE_FN (ip6_mcast_midchain_node) (vlib_main_t * vm,
2237 vlib_node_runtime_t * node,
2238 vlib_frame_t * frame)
2240 if (adj_are_counters_enabled ())
2241 return ip6_rewrite_inline (vm, node, frame, 1, 1, 1);
2243 return ip6_rewrite_inline (vm, node, frame, 0, 1, 1);
2247 VLIB_REGISTER_NODE (ip6_midchain_node) = {
2248 .name = "ip6-midchain",
2249 .vector_size = sizeof (u32),
2250 .format_trace = format_ip6_forward_next_trace,
2251 .sibling_of = "ip6-rewrite",
2254 VLIB_REGISTER_NODE (ip6_rewrite_node) =
2256 .name = "ip6-rewrite",
2257 .vector_size = sizeof (u32),
2258 .format_trace = format_ip6_rewrite_trace,
2259 .n_errors = IP6_N_ERROR,
2260 .error_counters = ip6_error_counters,
2261 .n_next_nodes = IP6_REWRITE_N_NEXT,
2264 [IP6_REWRITE_NEXT_DROP] = "ip6-drop",
2265 [IP6_REWRITE_NEXT_ICMP_ERROR] = "ip6-icmp-error",
2266 [IP6_REWRITE_NEXT_FRAGMENT] = "ip6-frag",
2270 VLIB_REGISTER_NODE (ip6_rewrite_bcast_node) = {
2271 .name = "ip6-rewrite-bcast",
2272 .vector_size = sizeof (u32),
2274 .format_trace = format_ip6_rewrite_trace,
2275 .sibling_of = "ip6-rewrite",
2278 VLIB_REGISTER_NODE (ip6_rewrite_mcast_node) =
2280 .name = "ip6-rewrite-mcast",
2281 .vector_size = sizeof (u32),
2282 .format_trace = format_ip6_rewrite_trace,
2283 .sibling_of = "ip6-rewrite",
2287 VLIB_REGISTER_NODE (ip6_mcast_midchain_node) =
2289 .name = "ip6-mcast-midchain",
2290 .vector_size = sizeof (u32),
2291 .format_trace = format_ip6_rewrite_trace,
2292 .sibling_of = "ip6-rewrite",
2298 * Hop-by-Hop handling
2300 #ifndef CLIB_MARCH_VARIANT
2301 ip6_hop_by_hop_main_t ip6_hop_by_hop_main;
2302 #endif /* CLIB_MARCH_VARIANT */
2304 #define foreach_ip6_hop_by_hop_error \
2305 _(PROCESSED, "pkts with ip6 hop-by-hop options") \
2306 _(FORMAT, "incorrectly formatted hop-by-hop options") \
2307 _(UNKNOWN_OPTION, "unknown ip6 hop-by-hop options")
2312 #define _(sym,str) IP6_HOP_BY_HOP_ERROR_##sym,
2313 foreach_ip6_hop_by_hop_error
2315 IP6_HOP_BY_HOP_N_ERROR,
2316 } ip6_hop_by_hop_error_t;
2320 * Primary h-b-h handler trace support
2321 * We work pretty hard on the problem for obvious reasons
2327 u8 option_data[256];
2328 } ip6_hop_by_hop_trace_t;
2330 extern vlib_node_registration_t ip6_hop_by_hop_node;
2332 static char *ip6_hop_by_hop_error_strings[] = {
2333 #define _(sym,string) string,
2334 foreach_ip6_hop_by_hop_error
2338 #ifndef CLIB_MARCH_VARIANT
2340 format_ip6_hop_by_hop_ext_hdr (u8 * s, va_list * args)
2342 ip6_hop_by_hop_header_t *hbh0 = va_arg (*args, ip6_hop_by_hop_header_t *);
2343 int total_len = va_arg (*args, int);
2344 ip6_hop_by_hop_option_t *opt0, *limit0;
2345 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2347 s = format (s, "IP6_HOP_BY_HOP: next protocol %d len %d total %d",
2348 hbh0->protocol, (hbh0->length + 1) << 3, total_len);
2350 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2351 limit0 = (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 + total_len);
2353 while (opt0 < limit0)
2358 case 0: /* Pad, just stop */
2359 opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0 + 1);
2363 if (hm->trace[type0])
2365 s = (*hm->trace[type0]) (s, opt0);
2369 s = format (s, "\n unrecognized option %d length %d", type0,
2373 (ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length +
2374 sizeof (ip6_hop_by_hop_option_t));
2383 format_ip6_hop_by_hop_trace (u8 * s, va_list * args)
2385 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
2386 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
2387 ip6_hop_by_hop_trace_t *t = va_arg (*args, ip6_hop_by_hop_trace_t *);
2388 ip6_hop_by_hop_header_t *hbh0;
2389 ip6_hop_by_hop_option_t *opt0, *limit0;
2390 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2394 hbh0 = (ip6_hop_by_hop_header_t *) t->option_data;
2396 s = format (s, "IP6_HOP_BY_HOP: next index %d len %d traced %d",
2397 t->next_index, (hbh0->length + 1) << 3, t->trace_len);
2399 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2400 limit0 = (ip6_hop_by_hop_option_t *) ((u8 *) hbh0) + t->trace_len;
2402 while (opt0 < limit0)
2407 case 0: /* Pad, just stop */
2408 opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0) + 1;
2412 if (hm->trace[type0])
2414 s = (*hm->trace[type0]) (s, opt0);
2418 s = format (s, "\n unrecognized option %d length %d", type0,
2422 (ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length +
2423 sizeof (ip6_hop_by_hop_option_t));
2431 ip6_scan_hbh_options (vlib_buffer_t * b0,
2433 ip6_hop_by_hop_header_t * hbh0,
2434 ip6_hop_by_hop_option_t * opt0,
2435 ip6_hop_by_hop_option_t * limit0, u32 * next0)
2437 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2441 while (opt0 < limit0)
2447 opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0) + 1;
2452 if (hm->options[type0])
2454 if ((*hm->options[type0]) (b0, ip0, opt0) < 0)
2456 error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2462 /* Unrecognized mandatory option, check the two high order bits */
2463 switch (opt0->type & HBH_OPTION_TYPE_HIGH_ORDER_BITS)
2465 case HBH_OPTION_TYPE_SKIP_UNKNOWN:
2467 case HBH_OPTION_TYPE_DISCARD_UNKNOWN:
2468 error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2469 *next0 = IP_LOOKUP_NEXT_DROP;
2471 case HBH_OPTION_TYPE_DISCARD_UNKNOWN_ICMP:
2472 error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2473 *next0 = IP_LOOKUP_NEXT_ICMP_ERROR;
2474 icmp6_error_set_vnet_buffer (b0, ICMP6_parameter_problem,
2475 ICMP6_parameter_problem_unrecognized_option,
2476 (u8 *) opt0 - (u8 *) ip0);
2478 case HBH_OPTION_TYPE_DISCARD_UNKNOWN_ICMP_NOT_MCAST:
2479 error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2480 if (!ip6_address_is_multicast (&ip0->dst_address))
2482 *next0 = IP_LOOKUP_NEXT_ICMP_ERROR;
2483 icmp6_error_set_vnet_buffer (b0,
2484 ICMP6_parameter_problem,
2485 ICMP6_parameter_problem_unrecognized_option,
2486 (u8 *) opt0 - (u8 *) ip0);
2490 *next0 = IP_LOOKUP_NEXT_DROP;
2498 (ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length +
2499 sizeof (ip6_hop_by_hop_option_t));
2505 * Process the Hop-by-Hop Options header
2507 VLIB_NODE_FN (ip6_hop_by_hop_node) (vlib_main_t * vm,
2508 vlib_node_runtime_t * node,
2509 vlib_frame_t * frame)
2511 vlib_node_runtime_t *error_node =
2512 vlib_node_get_runtime (vm, ip6_hop_by_hop_node.index);
2513 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2514 u32 n_left_from, *from, *to_next;
2515 ip_lookup_next_t next_index;
2517 from = vlib_frame_vector_args (frame);
2518 n_left_from = frame->n_vectors;
2519 next_index = node->cached_next_index;
2521 while (n_left_from > 0)
2525 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
2527 while (n_left_from >= 4 && n_left_to_next >= 2)
2530 vlib_buffer_t *b0, *b1;
2532 ip6_header_t *ip0, *ip1;
2533 ip6_hop_by_hop_header_t *hbh0, *hbh1;
2534 ip6_hop_by_hop_option_t *opt0, *limit0, *opt1, *limit1;
2535 u8 error0 = 0, error1 = 0;
2537 /* Prefetch next iteration. */
2539 vlib_buffer_t *p2, *p3;
2541 p2 = vlib_get_buffer (vm, from[2]);
2542 p3 = vlib_get_buffer (vm, from[3]);
2544 vlib_prefetch_buffer_header (p2, LOAD);
2545 vlib_prefetch_buffer_header (p3, LOAD);
2547 CLIB_PREFETCH (p2->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
2548 CLIB_PREFETCH (p3->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
2551 /* Speculatively enqueue b0, b1 to the current next frame */
2552 to_next[0] = bi0 = from[0];
2553 to_next[1] = bi1 = from[1];
2557 n_left_to_next -= 2;
2559 b0 = vlib_get_buffer (vm, bi0);
2560 b1 = vlib_get_buffer (vm, bi1);
2562 /* Default use the next_index from the adjacency. A HBH option rarely redirects to a different node */
2563 u32 adj_index0 = vnet_buffer (b0)->ip.adj_index[VLIB_TX];
2564 ip_adjacency_t *adj0 = adj_get (adj_index0);
2565 u32 adj_index1 = vnet_buffer (b1)->ip.adj_index[VLIB_TX];
2566 ip_adjacency_t *adj1 = adj_get (adj_index1);
2568 /* Default use the next_index from the adjacency. A HBH option rarely redirects to a different node */
2569 next0 = adj0->lookup_next_index;
2570 next1 = adj1->lookup_next_index;
2572 ip0 = vlib_buffer_get_current (b0);
2573 ip1 = vlib_buffer_get_current (b1);
2574 hbh0 = (ip6_hop_by_hop_header_t *) (ip0 + 1);
2575 hbh1 = (ip6_hop_by_hop_header_t *) (ip1 + 1);
2576 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2577 opt1 = (ip6_hop_by_hop_option_t *) (hbh1 + 1);
2579 (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 +
2580 ((hbh0->length + 1) << 3));
2582 (ip6_hop_by_hop_option_t *) ((u8 *) hbh1 +
2583 ((hbh1->length + 1) << 3));
2586 * Basic validity checks
2588 if ((hbh0->length + 1) << 3 >
2589 clib_net_to_host_u16 (ip0->payload_length))
2591 error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2592 next0 = IP_LOOKUP_NEXT_DROP;
2595 /* Scan the set of h-b-h options, process ones that we understand */
2596 error0 = ip6_scan_hbh_options (b0, ip0, hbh0, opt0, limit0, &next0);
2598 if ((hbh1->length + 1) << 3 >
2599 clib_net_to_host_u16 (ip1->payload_length))
2601 error1 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2602 next1 = IP_LOOKUP_NEXT_DROP;
2605 /* Scan the set of h-b-h options, process ones that we understand */
2606 error1 = ip6_scan_hbh_options (b1, ip1, hbh1, opt1, limit1, &next1);
2609 /* Has the classifier flagged this buffer for special treatment? */
2612 && (vnet_buffer (b0)->l2_classify.opaque_index & OI_DECAP)))
2613 next0 = hm->next_override;
2615 /* Has the classifier flagged this buffer for special treatment? */
2618 && (vnet_buffer (b1)->l2_classify.opaque_index & OI_DECAP)))
2619 next1 = hm->next_override;
2621 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)))
2623 if (b0->flags & VLIB_BUFFER_IS_TRACED)
2625 ip6_hop_by_hop_trace_t *t =
2626 vlib_add_trace (vm, node, b0, sizeof (*t));
2627 u32 trace_len = (hbh0->length + 1) << 3;
2628 t->next_index = next0;
2629 /* Capture the h-b-h option verbatim */
2632 ARRAY_LEN (t->option_data) ? trace_len :
2633 ARRAY_LEN (t->option_data);
2634 t->trace_len = trace_len;
2635 clib_memcpy_fast (t->option_data, hbh0, trace_len);
2637 if (b1->flags & VLIB_BUFFER_IS_TRACED)
2639 ip6_hop_by_hop_trace_t *t =
2640 vlib_add_trace (vm, node, b1, sizeof (*t));
2641 u32 trace_len = (hbh1->length + 1) << 3;
2642 t->next_index = next1;
2643 /* Capture the h-b-h option verbatim */
2646 ARRAY_LEN (t->option_data) ? trace_len :
2647 ARRAY_LEN (t->option_data);
2648 t->trace_len = trace_len;
2649 clib_memcpy_fast (t->option_data, hbh1, trace_len);
2654 b0->error = error_node->errors[error0];
2655 b1->error = error_node->errors[error1];
2657 /* verify speculative enqueue, maybe switch current next frame */
2658 vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
2659 n_left_to_next, bi0, bi1, next0,
2663 while (n_left_from > 0 && n_left_to_next > 0)
2669 ip6_hop_by_hop_header_t *hbh0;
2670 ip6_hop_by_hop_option_t *opt0, *limit0;
2673 /* Speculatively enqueue b0 to the current next frame */
2679 n_left_to_next -= 1;
2681 b0 = vlib_get_buffer (vm, bi0);
2683 * Default use the next_index from the adjacency.
2684 * A HBH option rarely redirects to a different node
2686 u32 adj_index0 = vnet_buffer (b0)->ip.adj_index[VLIB_TX];
2687 ip_adjacency_t *adj0 = adj_get (adj_index0);
2688 next0 = adj0->lookup_next_index;
2690 ip0 = vlib_buffer_get_current (b0);
2691 hbh0 = (ip6_hop_by_hop_header_t *) (ip0 + 1);
2692 opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
2694 (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 +
2695 ((hbh0->length + 1) << 3));
2698 * Basic validity checks
2700 if ((hbh0->length + 1) << 3 >
2701 clib_net_to_host_u16 (ip0->payload_length))
2703 error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2704 next0 = IP_LOOKUP_NEXT_DROP;
2708 /* Scan the set of h-b-h options, process ones that we understand */
2709 error0 = ip6_scan_hbh_options (b0, ip0, hbh0, opt0, limit0, &next0);
2712 /* Has the classifier flagged this buffer for special treatment? */
2715 && (vnet_buffer (b0)->l2_classify.opaque_index & OI_DECAP)))
2716 next0 = hm->next_override;
2718 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
2720 ip6_hop_by_hop_trace_t *t =
2721 vlib_add_trace (vm, node, b0, sizeof (*t));
2722 u32 trace_len = (hbh0->length + 1) << 3;
2723 t->next_index = next0;
2724 /* Capture the h-b-h option verbatim */
2727 ARRAY_LEN (t->option_data) ? trace_len :
2728 ARRAY_LEN (t->option_data);
2729 t->trace_len = trace_len;
2730 clib_memcpy_fast (t->option_data, hbh0, trace_len);
2733 b0->error = error_node->errors[error0];
2735 /* verify speculative enqueue, maybe switch current next frame */
2736 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
2737 n_left_to_next, bi0, next0);
2739 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2741 return frame->n_vectors;
2745 VLIB_REGISTER_NODE (ip6_hop_by_hop_node) =
2747 .name = "ip6-hop-by-hop",
2748 .sibling_of = "ip6-lookup",
2749 .vector_size = sizeof (u32),
2750 .format_trace = format_ip6_hop_by_hop_trace,
2751 .type = VLIB_NODE_TYPE_INTERNAL,
2752 .n_errors = ARRAY_LEN (ip6_hop_by_hop_error_strings),
2753 .error_strings = ip6_hop_by_hop_error_strings,
2758 static clib_error_t *
2759 ip6_hop_by_hop_init (vlib_main_t * vm)
2761 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2762 clib_memset (hm->options, 0, sizeof (hm->options));
2763 clib_memset (hm->trace, 0, sizeof (hm->trace));
2764 hm->next_override = IP6_LOOKUP_NEXT_POP_HOP_BY_HOP;
2768 VLIB_INIT_FUNCTION (ip6_hop_by_hop_init);
2770 #ifndef CLIB_MARCH_VARIANT
2772 ip6_hbh_set_next_override (uword next)
2774 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2776 hm->next_override = next;
2780 ip6_hbh_register_option (u8 option,
2781 int options (vlib_buffer_t * b, ip6_header_t * ip,
2782 ip6_hop_by_hop_option_t * opt),
2783 u8 * trace (u8 * s, ip6_hop_by_hop_option_t * opt))
2785 ip6_main_t *im = &ip6_main;
2786 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2788 ASSERT ((u32) option < ARRAY_LEN (hm->options));
2790 /* Already registered */
2791 if (hm->options[option])
2794 hm->options[option] = options;
2795 hm->trace[option] = trace;
2797 /* Set global variable */
2798 im->hbh_enabled = 1;
2804 ip6_hbh_unregister_option (u8 option)
2806 ip6_main_t *im = &ip6_main;
2807 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2809 ASSERT ((u32) option < ARRAY_LEN (hm->options));
2811 /* Not registered */
2812 if (!hm->options[option])
2815 hm->options[option] = NULL;
2816 hm->trace[option] = NULL;
2818 /* Disable global knob if this was the last option configured */
2821 for (i = 0; i < 256; i++)
2823 if (hm->options[option])
2830 im->hbh_enabled = 0;
2835 /* Global IP6 main. */
2836 ip6_main_t ip6_main;
2839 static clib_error_t *
2840 ip6_lookup_init (vlib_main_t * vm)
2842 ip6_main_t *im = &ip6_main;
2843 clib_error_t *error;
2846 if ((error = vlib_call_init_function (vm, vnet_feature_init)))
2849 for (i = 0; i < ARRAY_LEN (im->fib_masks); i++)
2856 for (j = 0; j < i0; j++)
2857 im->fib_masks[i].as_u32[j] = ~0;
2860 im->fib_masks[i].as_u32[i0] =
2861 clib_host_to_net_u32 (pow2_mask (i1) << (32 - i1));
2864 ip_lookup_init (&im->lookup_main, /* is_ip6 */ 1);
2866 /* Create FIB with index 0 and table id of 0. */
2867 fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6, 0,
2868 FIB_SOURCE_DEFAULT_ROUTE);
2869 mfib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6, 0,
2870 MFIB_SOURCE_DEFAULT_ROUTE);
2874 pn = pg_get_node (ip6_lookup_node.index);
2875 pn->unformat_edit = unformat_pg_ip6_header;
2878 /* Unless explicitly configured, don't process HBH options */
2879 im->hbh_enabled = 0;
2884 VLIB_INIT_FUNCTION (ip6_lookup_init);
2886 static clib_error_t *
2887 set_ip6_flow_hash_command_fn (vlib_main_t * vm,
2888 unformat_input_t * input,
2889 vlib_cli_command_t * cmd)
2893 u32 flow_hash_config = 0;
2896 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
2898 if (unformat (input, "table %d", &table_id))
2900 #define _(a, b, v) \
2901 else if (unformat (input, #a)) \
2903 flow_hash_config |= v; \
2906 foreach_flow_hash_bit
2913 return clib_error_return (0, "unknown input `%U'",
2914 format_unformat_error, input);
2916 rv = ip_flow_hash_set (AF_IP6, table_id, flow_hash_config);
2923 return clib_error_return (0, "no such FIB table %d", table_id);
2926 clib_warning ("BUG: illegal flow hash config 0x%x", flow_hash_config);
2934 * Configure the set of IPv6 fields used by the flow hash.
2938 * Example of how to set the flow hash on a given table:
2939 * @cliexcmd{set ip6 flow-hash table 8 dst sport dport proto}
2941 * Example of display the configured flow hash:
2942 * @cliexstart{show ip6 fib}
2943 * ipv6-VRF:0, fib_index 0, flow hash: src dst sport dport proto
2946 * [@0]: dpo-load-balance: [index:5 buckets:1 uRPF:5 to:[0:0]]
2947 * [0] [@0]: dpo-drop ip6
2950 * [@0]: dpo-load-balance: [index:10 buckets:1 uRPF:10 to:[0:0]]
2951 * [0] [@2]: dpo-receive
2954 * [@0]: dpo-load-balance: [index:8 buckets:1 uRPF:8 to:[0:0]]
2955 * [0] [@2]: dpo-receive
2958 * [@0]: dpo-load-balance: [index:7 buckets:1 uRPF:7 to:[0:0]]
2959 * [0] [@2]: dpo-receive
2962 * [@0]: dpo-load-balance: [index:9 buckets:1 uRPF:9 to:[0:0]]
2963 * [0] [@2]: dpo-receive
2964 * ff02::1:ff00:0/104
2966 * [@0]: dpo-load-balance: [index:6 buckets:1 uRPF:6 to:[0:0]]
2967 * [0] [@2]: dpo-receive
2968 * ipv6-VRF:8, fib_index 1, flow hash: dst sport dport proto
2971 * [@0]: dpo-load-balance: [index:21 buckets:1 uRPF:20 to:[0:0]]
2972 * [0] [@0]: dpo-drop ip6
2975 * [@0]: dpo-load-balance: [index:27 buckets:1 uRPF:26 to:[0:0]]
2976 * [0] [@4]: ipv6-glean: af_packet0
2979 * [@0]: dpo-load-balance: [index:28 buckets:1 uRPF:27 to:[0:0]]
2980 * [0] [@2]: dpo-receive: @::a:1:1:0:7 on af_packet0
2983 * [@0]: dpo-load-balance: [index:26 buckets:1 uRPF:25 to:[0:0]]
2984 * [0] [@2]: dpo-receive
2985 * fe80::fe:3eff:fe3e:9222/128
2987 * [@0]: dpo-load-balance: [index:29 buckets:1 uRPF:28 to:[0:0]]
2988 * [0] [@2]: dpo-receive: fe80::fe:3eff:fe3e:9222 on af_packet0
2991 * [@0]: dpo-load-balance: [index:24 buckets:1 uRPF:23 to:[0:0]]
2992 * [0] [@2]: dpo-receive
2995 * [@0]: dpo-load-balance: [index:23 buckets:1 uRPF:22 to:[0:0]]
2996 * [0] [@2]: dpo-receive
2999 * [@0]: dpo-load-balance: [index:25 buckets:1 uRPF:24 to:[0:0]]
3000 * [0] [@2]: dpo-receive
3001 * ff02::1:ff00:0/104
3003 * [@0]: dpo-load-balance: [index:22 buckets:1 uRPF:21 to:[0:0]]
3004 * [0] [@2]: dpo-receive
3009 VLIB_CLI_COMMAND (set_ip6_flow_hash_command, static) = {
3010 .path = "set ip6 flow-hash",
3011 .short_help = "set ip6 flow-hash table <table-id> [src] [dst] [sport] "
3012 "[dport] [proto] [reverse] [flowlabel]",
3013 .function = set_ip6_flow_hash_command_fn,
3017 static clib_error_t *
3018 show_ip6_local_command_fn (vlib_main_t * vm,
3019 unformat_input_t * input, vlib_cli_command_t * cmd)
3021 ip6_main_t *im = &ip6_main;
3022 ip_lookup_main_t *lm = &im->lookup_main;
3025 vlib_cli_output (vm, "Protocols handled by ip6_local");
3026 for (i = 0; i < ARRAY_LEN (lm->local_next_by_ip_protocol); i++)
3028 if (lm->local_next_by_ip_protocol[i] != IP_LOCAL_NEXT_PUNT)
3031 u32 node_index = vlib_get_node (vm,
3032 ip6_local_node.index)->
3033 next_nodes[lm->local_next_by_ip_protocol[i]];
3034 vlib_cli_output (vm, "%d: %U", i, format_vlib_node_name, vm,
3044 * Display the set of protocols handled by the local IPv6 stack.
3047 * Example of how to display local protocol table:
3048 * @cliexstart{show ip6 local}
3049 * Protocols handled by ip6_local
3057 VLIB_CLI_COMMAND (show_ip6_local, static) =
3059 .path = "show ip6 local",
3060 .function = show_ip6_local_command_fn,
3061 .short_help = "show ip6 local",
3065 #ifndef CLIB_MARCH_VARIANT
3067 vnet_set_ip6_classify_intfc (vlib_main_t *vm, u32 sw_if_index, u32 table_index)
3069 vnet_main_t *vnm = vnet_get_main ();
3070 vnet_interface_main_t *im = &vnm->interface_main;
3071 ip6_main_t *ipm = &ip6_main;
3072 ip_lookup_main_t *lm = &ipm->lookup_main;
3073 vnet_classify_main_t *cm = &vnet_classify_main;
3074 ip6_address_t *if_addr;
3076 if (pool_is_free_index (im->sw_interfaces, sw_if_index))
3077 return VNET_API_ERROR_NO_MATCHING_INTERFACE;
3079 if (table_index != ~0 && pool_is_free_index (cm->tables, table_index))
3080 return VNET_API_ERROR_NO_SUCH_ENTRY;
3082 vec_validate (lm->classify_table_index_by_sw_if_index, sw_if_index);
3083 lm->classify_table_index_by_sw_if_index[sw_if_index] = table_index;
3085 if_addr = ip6_interface_first_address (ipm, sw_if_index);
3087 if (NULL != if_addr)
3089 fib_prefix_t pfx = {
3091 .fp_proto = FIB_PROTOCOL_IP6,
3092 .fp_addr.ip6 = *if_addr,
3096 fib_index = fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4,
3098 if (table_index != (u32) ~ 0)
3100 dpo_id_t dpo = DPO_INVALID;
3104 classify_dpo_create (DPO_PROTO_IP6, table_index));
3105 fib_table_entry_special_dpo_add (fib_index,
3107 FIB_SOURCE_CLASSIFY,
3108 FIB_ENTRY_FLAG_NONE, &dpo);
3113 fib_table_entry_special_remove (fib_index,
3114 &pfx, FIB_SOURCE_CLASSIFY);
3122 static clib_error_t *
3123 set_ip6_classify_command_fn (vlib_main_t * vm,
3124 unformat_input_t * input,
3125 vlib_cli_command_t * cmd)
3127 u32 table_index = ~0;
3128 int table_index_set = 0;
3129 u32 sw_if_index = ~0;
3132 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
3134 if (unformat (input, "table-index %d", &table_index))
3135 table_index_set = 1;
3136 else if (unformat (input, "intfc %U", unformat_vnet_sw_interface,
3137 vnet_get_main (), &sw_if_index))
3143 if (table_index_set == 0)
3144 return clib_error_return (0, "classify table-index must be specified");
3146 if (sw_if_index == ~0)
3147 return clib_error_return (0, "interface / subif must be specified");
3149 rv = vnet_set_ip6_classify_intfc (vm, sw_if_index, table_index);
3156 case VNET_API_ERROR_NO_MATCHING_INTERFACE:
3157 return clib_error_return (0, "No such interface");
3159 case VNET_API_ERROR_NO_SUCH_ENTRY:
3160 return clib_error_return (0, "No such classifier table");
3166 * Assign a classification table to an interface. The classification
3167 * table is created using the '<em>classify table</em>' and '<em>classify session</em>'
3168 * commands. Once the table is create, use this command to filter packets
3172 * Example of how to assign a classification table to an interface:
3173 * @cliexcmd{set ip6 classify intfc GigabitEthernet2/0/0 table-index 1}
3176 VLIB_CLI_COMMAND (set_ip6_classify_command, static) =
3178 .path = "set ip6 classify",
3180 "set ip6 classify intfc <interface> table-index <classify-idx>",
3181 .function = set_ip6_classify_command_fn,
3186 * fd.io coding-style-patch-verification: ON
3189 * eval: (c-set-style "gnu")