2 * Copyright (c) 2015 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/ethernet/ethernet.h> /* for ethernet_header_t */
43 #include <vnet/srp/srp.h> /* for srp_hw_interface_class */
44 #include <vppinfra/cache.h>
46 #include <vppinfra/bihash_template.c>
48 static void compute_prefix_lengths_in_search_order (ip6_main_t * im)
51 vec_reset_length (im->prefix_lengths_in_search_order);
52 /* Note: bitmap reversed so this is in fact a longest prefix match */
53 clib_bitmap_foreach (i, im->non_empty_dst_address_length_bitmap,
55 int dst_address_length = 128 - i;
56 vec_add1 (im->prefix_lengths_in_search_order, dst_address_length);
61 ip6_fib_lookup_with_table (ip6_main_t * im, u32 fib_index, ip6_address_t * dst)
63 ip_lookup_main_t * lm = &im->lookup_main;
66 BVT(clib_bihash_kv) kv, value;
69 len = vec_len (im->prefix_lengths_in_search_order);
71 kv.key[0] = dst->as_u64[0];
72 kv.key[1] = dst->as_u64[1];
73 fib = ((u64)((fib_index))<<32);
75 for (i = 0; i < len; i++)
77 int dst_address_length = im->prefix_lengths_in_search_order[i];
78 ip6_address_t * mask = &im->fib_masks[dst_address_length];
80 ASSERT(dst_address_length >= 0 && dst_address_length <= 128);
81 //As lengths are decreasing, masks are increasingly specific.
82 kv.key[0] &= mask->as_u64[0];
83 kv.key[1] &= mask->as_u64[1];
84 kv.key[2] = fib | dst_address_length;
86 rv = BV(clib_bihash_search_inline_2)(&im->ip6_lookup_table, &kv, &value);
91 return lm->miss_adj_index;
94 u32 ip6_fib_lookup (ip6_main_t * im, u32 sw_if_index, ip6_address_t * dst)
96 u32 fib_index = vec_elt (im->fib_index_by_sw_if_index, sw_if_index);
97 return ip6_fib_lookup_with_table (im, fib_index, dst);
101 vnet_ip6_fib_init (ip6_main_t * im, u32 fib_index)
103 ip_lookup_main_t * lm = &im->lookup_main;
104 ip6_add_del_route_args_t a;
105 ip_adjacency_t * adj;
107 memset(&a, 0x0, sizeof(ip6_add_del_route_args_t));
109 a.table_index_or_table_id = fib_index;
110 a.flags = (IP6_ROUTE_FLAG_ADD
111 | IP6_ROUTE_FLAG_FIB_INDEX
112 | IP6_ROUTE_FLAG_KEEP_OLD_ADJACENCY
113 | IP6_ROUTE_FLAG_NO_REDISTRIBUTE);
115 /* Add ff02::1:ff00:0/104 via local route for all tables.
116 This is required for neighbor discovery to work. */
117 adj = ip_add_adjacency (lm, /* template */ 0, /* block size */ 1,
119 adj->lookup_next_index = IP_LOOKUP_NEXT_LOCAL;
120 adj->if_address_index = ~0;
121 adj->rewrite_header.data_bytes = 0;
123 ip6_set_solicited_node_multicast_address (&a.dst_address, 0);
125 a.dst_address_length = 104;
126 ip6_add_del_route (im, &a);
128 /* Add all-routers multicast address via local route for all tables */
129 adj = ip_add_adjacency (lm, /* template */ 0, /* block size */ 1,
131 adj->lookup_next_index = IP_LOOKUP_NEXT_LOCAL;
132 adj->if_address_index = ~0;
133 adj->rewrite_header.data_bytes = 0;
135 ip6_set_reserved_multicast_address (&a.dst_address,
136 IP6_MULTICAST_SCOPE_link_local,
137 IP6_MULTICAST_GROUP_ID_all_routers);
139 a.dst_address_length = 128;
140 ip6_add_del_route (im, &a);
142 /* Add all-nodes multicast address via local route for all tables */
143 adj = ip_add_adjacency (lm, /* template */ 0, /* block size */ 1,
145 adj->lookup_next_index = IP_LOOKUP_NEXT_LOCAL;
146 adj->if_address_index = ~0;
147 adj->rewrite_header.data_bytes = 0;
149 ip6_set_reserved_multicast_address (&a.dst_address,
150 IP6_MULTICAST_SCOPE_link_local,
151 IP6_MULTICAST_GROUP_ID_all_hosts);
153 a.dst_address_length = 128;
154 ip6_add_del_route (im, &a);
156 /* Add all-mldv2 multicast address via local route for all tables */
157 adj = ip_add_adjacency (lm, /* template */ 0, /* block size */ 1,
159 adj->lookup_next_index = IP_LOOKUP_NEXT_LOCAL;
160 adj->if_address_index = ~0;
161 adj->rewrite_header.data_bytes = 0;
163 ip6_set_reserved_multicast_address (&a.dst_address,
164 IP6_MULTICAST_SCOPE_link_local,
165 IP6_MULTICAST_GROUP_ID_mldv2_routers);
167 a.dst_address_length = 128;
168 ip6_add_del_route (im, &a);
172 create_fib_with_table_id (ip6_main_t * im, u32 table_id)
175 hash_set (im->fib_index_by_table_id, table_id, vec_len (im->fibs));
176 vec_add2 (im->fibs, fib, 1);
177 fib->table_id = table_id;
178 fib->index = fib - im->fibs;
179 fib->flow_hash_config = IP_FLOW_HASH_DEFAULT;
180 vnet_ip6_fib_init (im, fib->index);
185 find_ip6_fib_by_table_index_or_id (ip6_main_t * im, u32 table_index_or_id, u32 flags)
187 uword * p, fib_index;
189 fib_index = table_index_or_id;
190 if (! (flags & IP6_ROUTE_FLAG_FIB_INDEX))
192 if (table_index_or_id == ~0) {
193 table_index_or_id = 0;
194 while (hash_get (im->fib_index_by_table_id, table_index_or_id)) {
197 return create_fib_with_table_id (im, table_index_or_id);
200 p = hash_get (im->fib_index_by_table_id, table_index_or_id);
202 return create_fib_with_table_id (im, table_index_or_id);
205 return vec_elt_at_index (im->fibs, fib_index);
208 void ip6_add_del_route (ip6_main_t * im, ip6_add_del_route_args_t * a)
210 ip_lookup_main_t * lm = &im->lookup_main;
212 ip6_address_t dst_address;
213 u32 dst_address_length, adj_index;
215 u32 old_adj_index = ~0;
216 BVT(clib_bihash_kv) kv, value;
218 vlib_smp_unsafe_warning();
220 is_del = (a->flags & IP6_ROUTE_FLAG_DEL) != 0;
222 /* Either create new adjacency or use given one depending on arguments. */
223 if (a->n_add_adj > 0)
225 ip_add_adjacency (lm, a->add_adj, a->n_add_adj, &adj_index);
226 ip_call_add_del_adjacency_callbacks (lm, adj_index, /* is_del */ 0);
229 adj_index = a->adj_index;
231 dst_address = a->dst_address;
232 dst_address_length = a->dst_address_length;
233 fib = find_ip6_fib_by_table_index_or_id (im, a->table_index_or_table_id,
236 ASSERT (dst_address_length < ARRAY_LEN (im->fib_masks));
237 ip6_address_mask (&dst_address, &im->fib_masks[dst_address_length]);
239 /* refcount accounting */
242 ASSERT (im->dst_address_length_refcounts[dst_address_length] > 0);
243 if (--im->dst_address_length_refcounts[dst_address_length] == 0)
245 im->non_empty_dst_address_length_bitmap =
246 clib_bitmap_set (im->non_empty_dst_address_length_bitmap,
247 128 - dst_address_length, 0);
248 compute_prefix_lengths_in_search_order (im);
253 im->dst_address_length_refcounts[dst_address_length]++;
255 im->non_empty_dst_address_length_bitmap =
256 clib_bitmap_set (im->non_empty_dst_address_length_bitmap,
257 128 - dst_address_length, 1);
258 compute_prefix_lengths_in_search_order (im);
261 kv.key[0] = dst_address.as_u64[0];
262 kv.key[1] = dst_address.as_u64[1];
263 kv.key[2] = ((u64)((fib - im->fibs))<<32) | dst_address_length;
265 if (BV(clib_bihash_search)(&im->ip6_lookup_table, &kv, &value) == 0)
266 old_adj_index = value.value;
269 BV(clib_bihash_add_del) (&im->ip6_lookup_table, &kv, 0 /* is_add */);
272 /* Make sure adj index is valid. */
274 (void) ip_get_adjacency (lm, adj_index);
276 kv.value = adj_index;
278 BV(clib_bihash_add_del) (&im->ip6_lookup_table, &kv, 1 /* is_add */);
281 /* Avoid spurious reference count increments */
282 if (old_adj_index == adj_index
284 && !(a->flags & IP6_ROUTE_FLAG_KEEP_OLD_ADJACENCY))
286 ip_adjacency_t * adj = ip_get_adjacency (lm, adj_index);
287 if (adj->share_count > 0)
291 /* Delete old adjacency index if present and changed. */
293 if (! (a->flags & IP6_ROUTE_FLAG_KEEP_OLD_ADJACENCY)
294 && old_adj_index != ~0
295 && old_adj_index != adj_index)
296 ip_del_adjacency (lm, old_adj_index);
301 ip6_add_del_route_next_hop (ip6_main_t * im,
303 ip6_address_t * dst_address,
304 u32 dst_address_length,
305 ip6_address_t * next_hop,
306 u32 next_hop_sw_if_index,
307 u32 next_hop_weight, u32 adj_index,
308 u32 explicit_fib_index)
310 vnet_main_t * vnm = vnet_get_main();
311 ip_lookup_main_t * lm = &im->lookup_main;
314 ip6_address_t masked_dst_address;
315 u32 old_mp_adj_index, new_mp_adj_index;
316 u32 dst_adj_index, nh_adj_index;
318 ip_adjacency_t * dst_adj;
319 ip_multipath_adjacency_t * old_mp, * new_mp;
320 int is_del = (flags & IP6_ROUTE_FLAG_DEL) != 0;
321 int is_interface_next_hop;
322 clib_error_t * error = 0;
324 BVT(clib_bihash_kv) kv, value;
326 vlib_smp_unsafe_warning();
328 if (explicit_fib_index == (u32)~0)
329 fib_index = vec_elt (im->fib_index_by_sw_if_index, next_hop_sw_if_index);
331 fib_index = explicit_fib_index;
333 fib = vec_elt_at_index (im->fibs, fib_index);
335 /* Lookup next hop to be added or deleted. */
336 is_interface_next_hop = ip6_address_is_zero (next_hop);
337 if (adj_index == (u32)~0)
339 if (is_interface_next_hop)
341 nh_result = hash_get (im->interface_route_adj_index_by_sw_if_index,
342 next_hop_sw_if_index);
344 nh_adj_index = *nh_result;
347 ip_adjacency_t * adj;
348 adj = ip_add_adjacency (lm, /* template */ 0, /* block size */ 1,
350 ip6_adjacency_set_interface_route (vnm, adj,
351 next_hop_sw_if_index, ~0);
352 ip_call_add_del_adjacency_callbacks
353 (lm, next_hop_sw_if_index, /* is_del */ 0);
354 hash_set (im->interface_route_adj_index_by_sw_if_index,
355 next_hop_sw_if_index, nh_adj_index);
360 /* Look for the interface /128 route */
361 kv.key[0] = next_hop->as_u64[0];
362 kv.key[1] = next_hop->as_u64[1];
363 kv.key[2] = ((u64)((fib - im->fibs))<<32) | 128;
365 if (BV(clib_bihash_search)(&im->ip6_lookup_table, &kv, &value) < 0)
367 ip_adjacency_t * adj;
368 nh_adj_index = ip6_fib_lookup_with_table (im, fib_index, next_hop);
369 adj = ip_get_adjacency (lm, nh_adj_index);
370 /* if ND interface adjacencty is present, we need to
371 install ND adjaceny for specific next hop */
372 if (adj->lookup_next_index == IP_LOOKUP_NEXT_ARP &&
373 adj->arp.next_hop.ip6.as_u64[0] == 0 &&
374 adj->arp.next_hop.ip6.as_u64[1] == 0)
376 nh_adj_index = vnet_ip6_neighbor_glean_add(fib_index, next_hop);
380 ip_adjacency_t add_adj;
381 add_adj.lookup_next_index = IP_LOOKUP_NEXT_INDIRECT;
382 add_adj.indirect.next_hop.ip6.as_u64[0] = next_hop->as_u64[0];
383 add_adj.indirect.next_hop.ip6.as_u64[1] = next_hop->as_u64[1];
384 add_adj.explicit_fib_index = explicit_fib_index;
385 ip_add_adjacency (lm, &add_adj, 1, &nh_adj_index);
389 nh_adj_index = value.value;
395 /* Look for the interface /128 route */
396 kv.key[0] = next_hop->as_u64[0];
397 kv.key[1] = next_hop->as_u64[1];
398 kv.key[2] = ((u64)((fib - im->fibs))<<32) | 128;
400 if (BV(clib_bihash_search)(&im->ip6_lookup_table, &kv, &value) < 0)
402 vnm->api_errno = VNET_API_ERROR_UNKNOWN_DESTINATION;
403 error = clib_error_return (0, "next-hop %U/128 not in FIB",
404 format_ip6_address, next_hop);
408 nh_adj_index = value.value;
411 ASSERT (dst_address_length < ARRAY_LEN (im->fib_masks));
412 masked_dst_address = dst_address[0];
413 ip6_address_mask (&masked_dst_address, &im->fib_masks[dst_address_length]);
415 kv.key[0] = masked_dst_address.as_u64[0];
416 kv.key[1] = masked_dst_address.as_u64[1];
417 kv.key[2] = ((u64)((fib - im->fibs))<<32) | dst_address_length;
419 rv = BV(clib_bihash_search)(&im->ip6_lookup_table, &kv, &value);
423 dst_adj_index = value.value;
424 dst_adj = ip_get_adjacency (lm, dst_adj_index);
428 /* For deletes destination must be known. */
431 vnm->api_errno = VNET_API_ERROR_UNKNOWN_DESTINATION;
432 error = clib_error_return (0, "unknown destination %U/%d",
433 format_ip6_address, dst_address,
442 /* Ignore adds of X/128 with next hop of X. */
444 && dst_address_length == 128
445 && ip6_address_is_equal (dst_address, next_hop))
447 vnm->api_errno = VNET_API_ERROR_PREFIX_MATCHES_NEXT_HOP;
448 error = clib_error_return (0, "prefix matches next hop %U/%d",
449 format_ip6_address, dst_address,
454 /* Destination is not known and default weight is set so add route
455 to existing non-multipath adjacency */
456 if (dst_adj_index == ~0 && next_hop_weight == 1 && next_hop_sw_if_index == ~0)
458 /* create new adjacency */
459 ip6_add_del_route_args_t a;
460 a.table_index_or_table_id = fib_index;
461 a.flags = ((is_del ? IP6_ROUTE_FLAG_DEL : IP6_ROUTE_FLAG_ADD)
462 | IP6_ROUTE_FLAG_FIB_INDEX
463 | IP6_ROUTE_FLAG_KEEP_OLD_ADJACENCY
464 | (flags & (IP6_ROUTE_FLAG_NO_REDISTRIBUTE
465 | IP6_ROUTE_FLAG_NOT_LAST_IN_GROUP)));
466 a.dst_address = dst_address[0];
467 a.dst_address_length = dst_address_length;
468 a.adj_index = nh_adj_index;
472 ip6_add_del_route (im, &a);
476 old_mp_adj_index = dst_adj ? dst_adj->heap_handle : ~0;
478 if (! ip_multipath_adjacency_add_del_next_hop
480 dst_adj ? dst_adj->heap_handle : ~0,
485 vnm->api_errno = VNET_API_ERROR_NEXT_HOP_NOT_FOUND_MP;
486 error = clib_error_return
487 (0, "requested deleting next-hop %U not found in multi-path",
488 format_ip6_address, next_hop);
493 if (old_mp_adj_index != ~0)
494 old_mp = vec_elt_at_index (lm->multipath_adjacencies, old_mp_adj_index);
495 if (new_mp_adj_index != ~0)
496 new_mp = vec_elt_at_index (lm->multipath_adjacencies, new_mp_adj_index);
498 if (old_mp != new_mp)
500 ip6_add_del_route_args_t a;
501 a.table_index_or_table_id = fib_index;
502 a.flags = ((is_del ? IP6_ROUTE_FLAG_DEL : IP6_ROUTE_FLAG_ADD)
503 | IP6_ROUTE_FLAG_FIB_INDEX
504 | IP6_ROUTE_FLAG_KEEP_OLD_ADJACENCY
505 | (flags & IP6_ROUTE_FLAG_NO_REDISTRIBUTE));
506 a.dst_address = dst_address[0];
507 a.dst_address_length = dst_address_length;
508 a.adj_index = new_mp ? new_mp->adj_index : dst_adj_index;
512 ip6_add_del_route (im, &a);
517 clib_error_report (error);
521 ip6_get_route (ip6_main_t * im,
522 u32 table_index_or_table_id,
524 ip6_address_t * address,
527 ip6_fib_t * fib = find_ip6_fib_by_table_index_or_id (im, table_index_or_table_id, flags);
528 ip6_address_t masked_address;
529 BVT(clib_bihash_kv) kv, value;
531 ASSERT (address_length < ARRAY_LEN (im->fib_masks));
532 clib_memcpy (&masked_address, address, sizeof (masked_address));
533 ip6_address_mask (&masked_address, &im->fib_masks[address_length]);
535 kv.key[0] = masked_address.as_u64[0];
536 kv.key[1] = masked_address.as_u64[1];
537 kv.key[2] = ((u64)((fib - im->fibs))<<32) | address_length;
539 if (BV(clib_bihash_search)(&im->ip6_lookup_table, &kv, &value) == 0)
540 return (value.value);
545 ip6_foreach_matching_route (ip6_main_t * im,
546 u32 table_index_or_table_id,
548 ip6_address_t * dst_address,
550 ip6_address_t ** results,
551 u8 ** result_lengths)
554 find_ip6_fib_by_table_index_or_id (im, table_index_or_table_id, flags);
555 BVT(clib_bihash) * h = &im->ip6_lookup_table;
556 BVT(clib_bihash_value) * v;
557 clib_bihash_bucket_t * b;
561 _vec_len (*results) = 0;
563 _vec_len (*result_lengths) = 0;
565 /* Walk the table looking for routes which match the supplied address */
566 for (i = 0; i < h->nbuckets; i++)
572 v = BV(clib_bihash_get_value) (h, b->offset);
573 for (j = 0; j < (1<<b->log2_pages); j++)
575 for (k = 0; k < BIHASH_KVP_PER_PAGE; k++)
577 if (BV(clib_bihash_is_free)(&v->kvp[k]))
580 if ((v->kvp[k].key[2]
581 == (((u64)((fib - im->fibs))<<32) | address_length))
582 && ip6_destination_matches_route
583 (im, dst_address, (ip6_address_t *) &v->kvp[k],
588 a = (ip6_address_t *)(&v->kvp[k]);
590 vec_add1 (*results, a[0]);
591 vec_add1 (*result_lengths, address_length);
599 void ip6_maybe_remap_adjacencies (ip6_main_t * im,
600 u32 table_index_or_table_id,
605 = find_ip6_fib_by_table_index_or_id (im, table_index_or_table_id, flags);
607 ip_lookup_main_t * lm = &im->lookup_main;
609 if (lm->n_adjacency_remaps == 0)
612 clib_warning ("unimplemented, please report to vpp-dev@cisco.com");
614 /* All remaps have been performed. */
615 lm->n_adjacency_remaps = 0;
618 void ip6_delete_matching_routes (ip6_main_t * im,
619 u32 table_index_or_table_id,
621 ip6_address_t * address,
624 /* $$$$ static may be OK - this should happen only on thread 0 */
625 static ip6_address_t * matching_addresses;
626 static u8 * matching_address_lengths;
628 ip6_add_del_route_args_t a;
630 vlib_smp_unsafe_warning();
632 a.flags = IP6_ROUTE_FLAG_DEL | IP6_ROUTE_FLAG_NO_REDISTRIBUTE | flags;
633 a.table_index_or_table_id = table_index_or_table_id;
638 for (l = address_length + 1; l <= 128; l++)
640 ip6_foreach_matching_route (im, table_index_or_table_id, flags,
644 &matching_address_lengths);
645 for (i = 0; i < vec_len (matching_addresses); i++)
647 a.dst_address = matching_addresses[i];
648 a.dst_address_length = matching_address_lengths[i];
649 ip6_add_del_route (im, &a);
653 ip6_maybe_remap_adjacencies (im, table_index_or_table_id, flags);
657 ip6_lookup_inline (vlib_main_t * vm,
658 vlib_node_runtime_t * node,
659 vlib_frame_t * frame,
662 ip6_main_t * im = &ip6_main;
663 ip_lookup_main_t * lm = &im->lookup_main;
664 vlib_combined_counter_main_t * cm = &im->lookup_main.adjacency_counters;
665 u32 n_left_from, n_left_to_next, * from, * to_next;
666 ip_lookup_next_t next;
667 u32 cpu_index = os_get_cpu_number();
669 from = vlib_frame_vector_args (frame);
670 n_left_from = frame->n_vectors;
671 next = node->cached_next_index;
673 while (n_left_from > 0)
675 vlib_get_next_frame (vm, node, next,
676 to_next, n_left_to_next);
678 while (n_left_from >= 4 && n_left_to_next >= 2)
680 vlib_buffer_t * p0, * p1;
681 u32 pi0, pi1, adj_index0, adj_index1, wrong_next;
682 ip_lookup_next_t next0, next1;
683 ip6_header_t * ip0, * ip1;
684 ip_adjacency_t * adj0, * adj1;
685 ip6_address_t * dst_addr0, * dst_addr1;
686 u32 fib_index0, fib_index1;
687 u32 flow_hash_config0, flow_hash_config1;
689 /* Prefetch next iteration. */
691 vlib_buffer_t * p2, * p3;
693 p2 = vlib_get_buffer (vm, from[2]);
694 p3 = vlib_get_buffer (vm, from[3]);
696 vlib_prefetch_buffer_header (p2, LOAD);
697 vlib_prefetch_buffer_header (p3, LOAD);
698 CLIB_PREFETCH (p2->data, sizeof (ip0[0]), LOAD);
699 CLIB_PREFETCH (p3->data, sizeof (ip0[0]), LOAD);
702 pi0 = to_next[0] = from[0];
703 pi1 = to_next[1] = from[1];
705 p0 = vlib_get_buffer (vm, pi0);
706 p1 = vlib_get_buffer (vm, pi1);
708 ip0 = vlib_buffer_get_current (p0);
709 ip1 = vlib_buffer_get_current (p1);
713 ip_adjacency_t * iadj0, * iadj1;
714 iadj0 = ip_get_adjacency (lm, vnet_buffer(p0)->ip.adj_index[VLIB_TX]);
715 iadj1 = ip_get_adjacency (lm, vnet_buffer(p1)->ip.adj_index[VLIB_TX]);
716 dst_addr0 = &iadj0->indirect.next_hop.ip6;
717 dst_addr1 = &iadj1->indirect.next_hop.ip6;
721 dst_addr0 = &ip0->dst_address;
722 dst_addr1 = &ip1->dst_address;
725 fib_index0 = vec_elt (im->fib_index_by_sw_if_index, vnet_buffer (p0)->sw_if_index[VLIB_RX]);
726 fib_index1 = vec_elt (im->fib_index_by_sw_if_index, vnet_buffer (p1)->sw_if_index[VLIB_RX]);
728 fib_index0 = (vnet_buffer(p0)->sw_if_index[VLIB_TX] == (u32)~0) ?
729 fib_index0 : vnet_buffer(p0)->sw_if_index[VLIB_TX];
730 fib_index1 = (vnet_buffer(p1)->sw_if_index[VLIB_TX] == (u32)~0) ?
731 fib_index1 : vnet_buffer(p1)->sw_if_index[VLIB_TX];
733 adj_index0 = ip6_fib_lookup_with_table (im, fib_index0, dst_addr0);
734 adj_index1 = ip6_fib_lookup_with_table (im, fib_index1, dst_addr1);
736 adj0 = ip_get_adjacency (lm, adj_index0);
737 adj1 = ip_get_adjacency (lm, adj_index1);
739 if (PREDICT_FALSE (adj0->explicit_fib_index != ~0))
741 adj_index0 = ip6_fib_lookup_with_table
742 (im, adj0->explicit_fib_index, dst_addr0);
743 adj0 = ip_get_adjacency (lm, adj_index0);
745 if (PREDICT_FALSE (adj1->explicit_fib_index != ~0))
747 adj_index1 = ip6_fib_lookup_with_table
748 (im, adj1->explicit_fib_index, dst_addr1);
749 adj1 = ip_get_adjacency (lm, adj_index1);
752 next0 = adj0->lookup_next_index;
753 next1 = adj1->lookup_next_index;
755 /* Process hop-by-hop options if present */
756 next0 = (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS) ?
757 IP_LOOKUP_NEXT_HOP_BY_HOP : next0;
758 next1 = (ip1->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS) ?
759 IP_LOOKUP_NEXT_HOP_BY_HOP : next1;
761 vnet_buffer (p0)->ip.flow_hash =
762 vnet_buffer(p1)->ip.flow_hash = 0;
764 if (PREDICT_FALSE(adj0->n_adj > 1))
767 vec_elt_at_index (im->fibs,fib_index0)->flow_hash_config;
768 vnet_buffer (p0)->ip.flow_hash =
769 ip6_compute_flow_hash (ip0, flow_hash_config0);
772 if (PREDICT_FALSE(adj1->n_adj > 1))
775 vec_elt_at_index (im->fibs,fib_index0)->flow_hash_config;
777 vnet_buffer (p1)->ip.flow_hash =
778 ip6_compute_flow_hash (ip1, flow_hash_config1);
781 ASSERT (adj0->n_adj > 0);
782 ASSERT (adj1->n_adj > 0);
783 ASSERT (is_pow2 (adj0->n_adj));
784 ASSERT (is_pow2 (adj1->n_adj));
785 adj_index0 += (vnet_buffer (p0)->ip.flow_hash & (adj0->n_adj - 1));
786 adj_index1 += (vnet_buffer (p1)->ip.flow_hash & (adj1->n_adj - 1));
788 vnet_buffer (p0)->ip.adj_index[VLIB_TX] = adj_index0;
789 vnet_buffer (p1)->ip.adj_index[VLIB_TX] = adj_index1;
791 vlib_increment_combined_counter
792 (cm, cpu_index, adj_index0, 1,
793 vlib_buffer_length_in_chain (vm, p0));
794 vlib_increment_combined_counter
795 (cm, cpu_index, adj_index1, 1,
796 vlib_buffer_length_in_chain (vm, p1));
803 wrong_next = (next0 != next) + 2*(next1 != next);
804 if (PREDICT_FALSE (wrong_next != 0))
813 vlib_set_next_frame_buffer (vm, node, next0, pi0);
820 vlib_set_next_frame_buffer (vm, node, next1, pi1);
827 vlib_set_next_frame_buffer (vm, node, next0, pi0);
828 vlib_set_next_frame_buffer (vm, node, next1, pi1);
832 vlib_put_next_frame (vm, node, next, n_left_to_next);
834 vlib_get_next_frame (vm, node, next, to_next, n_left_to_next);
840 while (n_left_from > 0 && n_left_to_next > 0)
845 ip_lookup_next_t next0;
846 ip_adjacency_t * adj0;
847 ip6_address_t * dst_addr0;
848 u32 fib_index0, flow_hash_config0;
853 p0 = vlib_get_buffer (vm, pi0);
855 ip0 = vlib_buffer_get_current (p0);
859 ip_adjacency_t * iadj0;
860 iadj0 = ip_get_adjacency (lm, vnet_buffer(p0)->ip.adj_index[VLIB_TX]);
861 dst_addr0 = &iadj0->indirect.next_hop.ip6;
865 dst_addr0 = &ip0->dst_address;
868 fib_index0 = vec_elt (im->fib_index_by_sw_if_index, vnet_buffer (p0)->sw_if_index[VLIB_RX]);
869 fib_index0 = (vnet_buffer(p0)->sw_if_index[VLIB_TX] == (u32)~0) ?
870 fib_index0 : vnet_buffer(p0)->sw_if_index[VLIB_TX];
873 vec_elt_at_index (im->fibs,fib_index0)->flow_hash_config;
875 adj_index0 = ip6_fib_lookup_with_table (im, fib_index0, dst_addr0);
877 adj0 = ip_get_adjacency (lm, adj_index0);
879 if (PREDICT_FALSE (adj0->explicit_fib_index != ~0))
881 adj_index0 = ip6_fib_lookup_with_table
882 (im, adj0->explicit_fib_index, dst_addr0);
883 adj0 = ip_get_adjacency (lm, adj_index0);
886 next0 = adj0->lookup_next_index;
887 next0 = (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS) ?
888 IP_LOOKUP_NEXT_HOP_BY_HOP : next0;
890 vnet_buffer (p0)->ip.flow_hash = 0;
892 if (PREDICT_FALSE(adj0->n_adj > 1))
895 vec_elt_at_index (im->fibs,fib_index0)->flow_hash_config;
896 vnet_buffer (p0)->ip.flow_hash =
897 ip6_compute_flow_hash (ip0, flow_hash_config0);
900 ASSERT (adj0->n_adj > 0);
901 ASSERT (is_pow2 (adj0->n_adj));
902 adj_index0 += (vnet_buffer (p0)->ip.flow_hash & (adj0->n_adj - 1));
904 vnet_buffer (p0)->ip.adj_index[VLIB_TX] = adj_index0;
906 vlib_increment_combined_counter
907 (cm, cpu_index, adj_index0, 1,
908 vlib_buffer_length_in_chain (vm, p0));
915 if (PREDICT_FALSE (next0 != next))
918 vlib_put_next_frame (vm, node, next, n_left_to_next);
920 vlib_get_next_frame (vm, node, next,
921 to_next, n_left_to_next);
928 vlib_put_next_frame (vm, node, next, n_left_to_next);
931 return frame->n_vectors;
934 void ip6_adjacency_set_interface_route (vnet_main_t * vnm,
935 ip_adjacency_t * adj,
937 u32 if_address_index)
939 vnet_hw_interface_t * hw = vnet_get_sup_hw_interface (vnm, sw_if_index);
943 if (hw->hw_class_index == ethernet_hw_interface_class.index
944 || hw->hw_class_index == srp_hw_interface_class.index)
946 n = IP_LOOKUP_NEXT_ARP;
947 node_index = ip6_discover_neighbor_node.index;
948 adj->if_address_index = if_address_index;
949 adj->arp.next_hop.ip6.as_u64[0] = 0;
950 adj->arp.next_hop.ip6.as_u64[1] = 0;
954 n = IP_LOOKUP_NEXT_REWRITE;
955 node_index = ip6_rewrite_node.index;
958 adj->lookup_next_index = n;
959 adj->explicit_fib_index = ~0;
961 vnet_rewrite_for_sw_interface
963 VNET_L3_PACKET_TYPE_IP6,
966 VNET_REWRITE_FOR_SW_INTERFACE_ADDRESS_BROADCAST,
967 &adj->rewrite_header,
968 sizeof (adj->rewrite_data));
972 ip6_add_interface_routes (vnet_main_t * vnm, u32 sw_if_index,
973 ip6_main_t * im, u32 fib_index,
974 ip_interface_address_t * a)
976 ip_lookup_main_t * lm = &im->lookup_main;
977 ip_adjacency_t * adj;
978 ip6_address_t * address = ip_interface_address_get_address (lm, a);
979 ip6_add_del_route_args_t x;
980 vnet_hw_interface_t * hw_if = vnet_get_sup_hw_interface (vnm, sw_if_index);
981 u32 classify_table_index;
983 /* Add e.g. 1.0.0.0/8 as interface route (arp for Ethernet). */
984 x.table_index_or_table_id = fib_index;
985 x.flags = (IP6_ROUTE_FLAG_ADD
986 | IP6_ROUTE_FLAG_FIB_INDEX
987 | IP6_ROUTE_FLAG_NO_REDISTRIBUTE);
988 x.dst_address = address[0];
989 x.dst_address_length = a->address_length;
993 a->neighbor_probe_adj_index = ~0;
994 if (a->address_length < 128)
996 adj = ip_add_adjacency (lm, /* template */ 0, /* block size */ 1,
998 ip6_adjacency_set_interface_route (vnm, adj, sw_if_index, a - lm->if_address_pool);
999 ip_call_add_del_adjacency_callbacks (lm, x.adj_index, /* is_del */ 0);
1000 ip6_add_del_route (im, &x);
1001 a->neighbor_probe_adj_index = x.adj_index;
1004 /* Add e.g. ::1/128 as local to this host. */
1005 adj = ip_add_adjacency (lm, /* template */ 0, /* block size */ 1,
1008 classify_table_index = ~0;
1009 if (sw_if_index < vec_len (lm->classify_table_index_by_sw_if_index))
1010 classify_table_index = lm->classify_table_index_by_sw_if_index [sw_if_index];
1011 if (classify_table_index != (u32) ~0)
1013 adj->lookup_next_index = IP_LOOKUP_NEXT_CLASSIFY;
1014 adj->classify.table_index = classify_table_index;
1017 adj->lookup_next_index = IP_LOOKUP_NEXT_LOCAL;
1019 adj->if_address_index = a - lm->if_address_pool;
1020 adj->rewrite_header.sw_if_index = sw_if_index;
1021 adj->rewrite_header.max_l3_packet_bytes = hw_if->max_l3_packet_bytes[VLIB_RX];
1022 adj->rewrite_header.data_bytes = 0;
1023 ip_call_add_del_adjacency_callbacks (lm, x.adj_index, /* is_del */ 0);
1024 x.dst_address_length = 128;
1025 ip6_add_del_route (im, &x);
1029 ip6_del_interface_routes (ip6_main_t * im, u32 fib_index,
1030 ip6_address_t * address, u32 address_length)
1032 ip6_add_del_route_args_t x;
1034 /* Add e.g. 1.0.0.0/8 as interface route (arp for Ethernet). */
1035 x.table_index_or_table_id = fib_index;
1036 x.flags = (IP6_ROUTE_FLAG_DEL
1037 | IP6_ROUTE_FLAG_FIB_INDEX
1038 | IP6_ROUTE_FLAG_NO_REDISTRIBUTE);
1039 x.dst_address = address[0];
1040 x.dst_address_length = address_length;
1045 if (address_length < 128)
1047 /* Don't wipe out fe80::0/64 */
1048 if (address_length != 64 ||
1049 address[0].as_u64[0] != clib_net_to_host_u64(0xfe80000000000000ULL))
1050 ip6_add_del_route (im, &x);
1053 x.dst_address_length = 128;
1054 ip6_add_del_route (im, &x);
1056 ip6_delete_matching_routes (im,
1058 IP6_ROUTE_FLAG_FIB_INDEX,
1065 ip6_address_t address;
1067 } ip6_interface_address_t;
1069 static clib_error_t *
1070 ip6_add_del_interface_address_internal (vlib_main_t * vm,
1072 ip6_address_t * new_address,
1078 static clib_error_t *
1079 ip6_add_del_interface_address_internal (vlib_main_t * vm,
1081 ip6_address_t * address,
1087 vnet_main_t * vnm = vnet_get_main();
1088 ip6_main_t * im = &ip6_main;
1089 ip_lookup_main_t * lm = &im->lookup_main;
1090 clib_error_t * error;
1091 u32 if_address_index;
1092 ip6_address_fib_t ip6_af, * addr_fib = 0;
1094 vec_validate (im->fib_index_by_sw_if_index, sw_if_index);
1095 ip6_addr_fib_init (&ip6_af, address,
1096 vec_elt (im->fib_index_by_sw_if_index, sw_if_index));
1097 vec_add1 (addr_fib, ip6_af);
1100 uword elts_before = pool_elts (lm->if_address_pool);
1102 error = ip_interface_address_add_del
1112 /* Pool did not grow: add duplicate address. */
1113 if (elts_before == pool_elts (lm->if_address_pool))
1117 if (vnet_sw_interface_is_admin_up (vnm, sw_if_index) && insert_routes)
1120 ip6_del_interface_routes (im, ip6_af.fib_index, address,
1124 ip6_add_interface_routes (vnm, sw_if_index,
1125 im, ip6_af.fib_index,
1126 pool_elt_at_index (lm->if_address_pool, if_address_index));
1130 ip6_add_del_interface_address_callback_t * cb;
1131 vec_foreach (cb, im->add_del_interface_address_callbacks)
1132 cb->function (im, cb->function_opaque, sw_if_index,
1133 address, address_length,
1139 vec_free (addr_fib);
1144 ip6_add_del_interface_address (vlib_main_t * vm, u32 sw_if_index,
1145 ip6_address_t * address, u32 address_length,
1148 return ip6_add_del_interface_address_internal
1149 (vm, sw_if_index, address, address_length,
1150 /* redistribute */ 1,
1151 /* insert_routes */ 1,
1156 ip6_sw_interface_admin_up_down (vnet_main_t * vnm,
1160 ip6_main_t * im = &ip6_main;
1161 ip_interface_address_t * ia;
1163 u32 is_admin_up, fib_index;
1165 /* Fill in lookup tables with default table (0). */
1166 vec_validate (im->fib_index_by_sw_if_index, sw_if_index);
1168 vec_validate_init_empty (im->lookup_main.if_address_pool_index_by_sw_if_index, sw_if_index, ~0);
1170 is_admin_up = (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) != 0;
1172 fib_index = vec_elt (im->fib_index_by_sw_if_index, sw_if_index);
1174 foreach_ip_interface_address (&im->lookup_main, ia, sw_if_index,
1175 0 /* honor unnumbered */,
1177 a = ip_interface_address_get_address (&im->lookup_main, ia);
1179 ip6_add_interface_routes (vnm, sw_if_index,
1183 ip6_del_interface_routes (im, fib_index,
1184 a, ia->address_length);
1190 VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION (ip6_sw_interface_admin_up_down);
1193 ip6_sw_interface_add_del (vnet_main_t * vnm,
1197 vlib_main_t * vm = vnm->vlib_main;
1198 ip6_main_t * im = &ip6_main;
1199 ip_lookup_main_t * lm = &im->lookup_main;
1202 for (cast = 0; cast < VNET_N_CAST; cast++)
1204 ip_config_main_t * cm = &lm->rx_config_mains[cast];
1205 vnet_config_main_t * vcm = &cm->config_main;
1207 /* FIXME multicast. */
1208 if (! vcm->node_index_by_feature_index)
1210 char * start_nodes[] = { "ip6-input", };
1211 char * feature_nodes[] = {
1212 [IP6_RX_FEATURE_CHECK_ACCESS] = "ip6-inacl",
1213 [IP6_RX_FEATURE_IPSEC] = "ipsec-input-ip6",
1214 [IP6_RX_FEATURE_L2TPV3] = "l2tp-decap",
1215 [IP6_RX_FEATURE_VPATH] = "vpath-input-ip6",
1216 [IP6_RX_FEATURE_LOOKUP] = "ip6-lookup",
1218 vnet_config_init (vm, vcm,
1219 start_nodes, ARRAY_LEN (start_nodes),
1220 feature_nodes, ARRAY_LEN (feature_nodes));
1223 vec_validate_init_empty (cm->config_index_by_sw_if_index, sw_if_index, ~0);
1224 ci = cm->config_index_by_sw_if_index[sw_if_index];
1227 ci = vnet_config_add_feature (vm, vcm,
1229 IP6_RX_FEATURE_LOOKUP,
1230 /* config data */ 0,
1231 /* # bytes of config data */ 0);
1233 ci = vnet_config_del_feature (vm, vcm,
1235 IP6_RX_FEATURE_LOOKUP,
1236 /* config data */ 0,
1237 /* # bytes of config data */ 0);
1239 cm->config_index_by_sw_if_index[sw_if_index] = ci;
1241 return /* no error */ 0;
1244 VNET_SW_INTERFACE_ADD_DEL_FUNCTION (ip6_sw_interface_add_del);
1247 ip6_lookup (vlib_main_t * vm,
1248 vlib_node_runtime_t * node,
1249 vlib_frame_t * frame)
1251 return ip6_lookup_inline (vm, node, frame, /* is_indirect */ 0);
1254 VLIB_REGISTER_NODE (ip6_lookup_node) = {
1255 .function = ip6_lookup,
1256 .name = "ip6-lookup",
1257 .vector_size = sizeof (u32),
1259 .n_next_nodes = IP_LOOKUP_N_NEXT,
1260 .next_nodes = IP6_LOOKUP_NEXT_NODES,
1263 VLIB_NODE_FUNCTION_MULTIARCH (ip6_lookup_node, ip6_lookup)
1266 ip6_indirect (vlib_main_t * vm,
1267 vlib_node_runtime_t * node,
1268 vlib_frame_t * frame)
1270 return ip6_lookup_inline (vm, node, frame, /* is_indirect */ 1);
1274 VLIB_REGISTER_NODE (ip6_indirect_node) = {
1275 .function = ip6_indirect,
1276 .name = "ip6-indirect",
1277 .vector_size = sizeof (u32),
1279 .n_next_nodes = IP_LOOKUP_N_NEXT,
1280 .next_nodes = IP6_LOOKUP_NEXT_NODES,
1283 VLIB_NODE_FUNCTION_MULTIARCH (ip6_indirect_node, ip6_indirect)
1286 /* Adjacency taken. */
1291 /* Packet data, possibly *after* rewrite. */
1292 u8 packet_data[128 - 1*sizeof(u32)];
1293 } ip6_forward_next_trace_t;
1295 static u8 * format_ip6_forward_next_trace (u8 * s, va_list * args)
1297 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
1298 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
1299 ip6_forward_next_trace_t * t = va_arg (*args, ip6_forward_next_trace_t *);
1300 vnet_main_t * vnm = vnet_get_main();
1301 ip6_main_t * im = &ip6_main;
1302 ip_adjacency_t * adj;
1303 uword indent = format_get_indent (s);
1305 adj = ip_get_adjacency (&im->lookup_main, t->adj_index);
1306 s = format (s, "fib %d adj-idx %d : %U flow hash: 0x%08x",
1307 t->fib_index, t->adj_index, format_ip_adjacency,
1308 vnm, &im->lookup_main, t->adj_index, t->flow_hash);
1309 switch (adj->lookup_next_index)
1311 case IP_LOOKUP_NEXT_REWRITE:
1312 s = format (s, "\n%U%U",
1313 format_white_space, indent,
1314 format_ip_adjacency_packet_data,
1315 vnm, &im->lookup_main, t->adj_index,
1316 t->packet_data, sizeof (t->packet_data));
1326 /* Common trace function for all ip6-forward next nodes. */
1328 ip6_forward_next_trace (vlib_main_t * vm,
1329 vlib_node_runtime_t * node,
1330 vlib_frame_t * frame,
1331 vlib_rx_or_tx_t which_adj_index)
1334 ip6_main_t * im = &ip6_main;
1336 n_left = frame->n_vectors;
1337 from = vlib_frame_vector_args (frame);
1342 vlib_buffer_t * b0, * b1;
1343 ip6_forward_next_trace_t * t0, * t1;
1345 /* Prefetch next iteration. */
1346 vlib_prefetch_buffer_with_index (vm, from[2], LOAD);
1347 vlib_prefetch_buffer_with_index (vm, from[3], LOAD);
1352 b0 = vlib_get_buffer (vm, bi0);
1353 b1 = vlib_get_buffer (vm, bi1);
1355 if (b0->flags & VLIB_BUFFER_IS_TRACED)
1357 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
1358 t0->adj_index = vnet_buffer (b0)->ip.adj_index[which_adj_index];
1359 t0->flow_hash = vnet_buffer (b0)->ip.flow_hash;
1360 t0->fib_index = vec_elt (im->fib_index_by_sw_if_index,
1361 vnet_buffer(b0)->sw_if_index[VLIB_RX]);
1362 clib_memcpy (t0->packet_data,
1363 vlib_buffer_get_current (b0),
1364 sizeof (t0->packet_data));
1366 if (b1->flags & VLIB_BUFFER_IS_TRACED)
1368 t1 = vlib_add_trace (vm, node, b1, sizeof (t1[0]));
1369 t1->adj_index = vnet_buffer (b1)->ip.adj_index[which_adj_index];
1370 t1->flow_hash = vnet_buffer (b1)->ip.flow_hash;
1371 t1->fib_index = vec_elt (im->fib_index_by_sw_if_index,
1372 vnet_buffer(b1)->sw_if_index[VLIB_RX]);
1373 clib_memcpy (t1->packet_data,
1374 vlib_buffer_get_current (b1),
1375 sizeof (t1->packet_data));
1385 ip6_forward_next_trace_t * t0;
1389 b0 = vlib_get_buffer (vm, bi0);
1391 if (b0->flags & VLIB_BUFFER_IS_TRACED)
1393 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
1394 t0->adj_index = vnet_buffer (b0)->ip.adj_index[which_adj_index];
1395 t0->flow_hash = vnet_buffer (b0)->ip.flow_hash;
1396 t0->fib_index = vec_elt (im->fib_index_by_sw_if_index,
1397 vnet_buffer(b0)->sw_if_index[VLIB_RX]);
1398 clib_memcpy (t0->packet_data,
1399 vlib_buffer_get_current (b0),
1400 sizeof (t0->packet_data));
1408 ip6_drop_or_punt (vlib_main_t * vm,
1409 vlib_node_runtime_t * node,
1410 vlib_frame_t * frame,
1411 ip6_error_t error_code)
1413 u32 * buffers = vlib_frame_vector_args (frame);
1414 uword n_packets = frame->n_vectors;
1416 vlib_error_drop_buffers (vm, node,
1421 ip6_input_node.index,
1424 if (node->flags & VLIB_NODE_FLAG_TRACE)
1425 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
1431 ip6_drop (vlib_main_t * vm,
1432 vlib_node_runtime_t * node,
1433 vlib_frame_t * frame)
1434 { return ip6_drop_or_punt (vm, node, frame, IP6_ERROR_ADJACENCY_DROP); }
1437 ip6_punt (vlib_main_t * vm,
1438 vlib_node_runtime_t * node,
1439 vlib_frame_t * frame)
1440 { return ip6_drop_or_punt (vm, node, frame, IP6_ERROR_ADJACENCY_PUNT); }
1443 ip6_miss (vlib_main_t * vm,
1444 vlib_node_runtime_t * node,
1445 vlib_frame_t * frame)
1446 { return ip6_drop_or_punt (vm, node, frame, IP6_ERROR_DST_LOOKUP_MISS); }
1448 VLIB_REGISTER_NODE (ip6_drop_node,static) = {
1449 .function = ip6_drop,
1451 .vector_size = sizeof (u32),
1453 .format_trace = format_ip6_forward_next_trace,
1461 VLIB_NODE_FUNCTION_MULTIARCH (ip6_drop_node, ip6_drop)
1463 VLIB_REGISTER_NODE (ip6_punt_node,static) = {
1464 .function = ip6_punt,
1466 .vector_size = sizeof (u32),
1468 .format_trace = format_ip6_forward_next_trace,
1476 VLIB_NODE_FUNCTION_MULTIARCH (ip6_punt_node, ip6_punt)
1478 VLIB_REGISTER_NODE (ip6_miss_node,static) = {
1479 .function = ip6_miss,
1481 .vector_size = sizeof (u32),
1483 .format_trace = format_ip6_forward_next_trace,
1491 VLIB_NODE_FUNCTION_MULTIARCH (ip6_miss_node, ip6_miss)
1493 VLIB_REGISTER_NODE (ip6_multicast_node,static) = {
1494 .function = ip6_drop,
1495 .name = "ip6-multicast",
1496 .vector_size = sizeof (u32),
1498 .format_trace = format_ip6_forward_next_trace,
1506 /* Compute TCP/UDP/ICMP6 checksum in software. */
1507 u16 ip6_tcp_udp_icmp_compute_checksum (vlib_main_t * vm, vlib_buffer_t * p0, ip6_header_t * ip0, int *bogus_lengthp)
1510 u16 sum16, payload_length_host_byte_order;
1511 u32 i, n_this_buffer, n_bytes_left;
1512 u32 headers_size = sizeof(ip0[0]);
1513 void * data_this_buffer;
1515 ASSERT(bogus_lengthp);
1518 /* Initialize checksum with ip header. */
1519 sum0 = ip0->payload_length + clib_host_to_net_u16 (ip0->protocol);
1520 payload_length_host_byte_order = clib_net_to_host_u16 (ip0->payload_length);
1521 data_this_buffer = (void *) (ip0 + 1);
1523 for (i = 0; i < ARRAY_LEN (ip0->src_address.as_uword); i++)
1525 sum0 = ip_csum_with_carry (sum0,
1526 clib_mem_unaligned (&ip0->src_address.as_uword[i], uword));
1527 sum0 = ip_csum_with_carry (sum0,
1528 clib_mem_unaligned (&ip0->dst_address.as_uword[i], uword));
1531 /* some icmp packets may come with a "router alert" hop-by-hop extension header (e.g., mldv2 packets) */
1532 if (PREDICT_FALSE (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
1535 ip6_hop_by_hop_ext_t *ext_hdr = (ip6_hop_by_hop_ext_t *)data_this_buffer;
1537 /* validate really icmp6 next */
1538 ASSERT(ext_hdr->next_hdr == IP_PROTOCOL_ICMP6);
1540 skip_bytes = 8* (1 + ext_hdr->n_data_u64s);
1541 data_this_buffer = (void *)((u8 *)data_this_buffer + skip_bytes);
1543 payload_length_host_byte_order -= skip_bytes;
1544 headers_size += skip_bytes;
1547 n_bytes_left = n_this_buffer = payload_length_host_byte_order;
1549 if (p0 && n_this_buffer + headers_size > p0->current_length)
1551 struct rte_mbuf *mb = rte_mbuf_from_vlib_buffer(p0);
1552 u8 nb_segs = mb->nb_segs;
1554 n_this_buffer = (p0->current_length > headers_size ?
1555 p0->current_length - headers_size : 0);
1556 while (n_bytes_left)
1558 sum0 = ip_incremental_checksum (sum0, data_this_buffer, n_this_buffer);
1559 n_bytes_left -= n_this_buffer;
1563 if ((nb_segs == 0) || (mb == 0))
1566 data_this_buffer = rte_ctrlmbuf_data(mb);
1567 n_this_buffer = mb->data_len;
1569 if (n_bytes_left || nb_segs)
1575 else sum0 = ip_incremental_checksum (sum0, data_this_buffer, n_this_buffer);
1577 if (p0 && n_this_buffer + headers_size > p0->current_length)
1578 n_this_buffer = p0->current_length > headers_size ? p0->current_length - headers_size : 0;
1581 sum0 = ip_incremental_checksum (sum0, data_this_buffer, n_this_buffer);
1582 n_bytes_left -= n_this_buffer;
1583 if (n_bytes_left == 0)
1586 if (!(p0->flags & VLIB_BUFFER_NEXT_PRESENT))
1591 p0 = vlib_get_buffer (vm, p0->next_buffer);
1592 data_this_buffer = vlib_buffer_get_current (p0);
1593 n_this_buffer = p0->current_length;
1597 sum16 = ~ ip_csum_fold (sum0);
1602 u32 ip6_tcp_udp_icmp_validate_checksum (vlib_main_t * vm, vlib_buffer_t * p0)
1604 ip6_header_t * ip0 = vlib_buffer_get_current (p0);
1605 udp_header_t * udp0;
1609 /* some icmp packets may come with a "router alert" hop-by-hop extension header (e.g., mldv2 packets) */
1610 ASSERT (ip0->protocol == IP_PROTOCOL_TCP
1611 || ip0->protocol == IP_PROTOCOL_ICMP6
1612 || ip0->protocol == IP_PROTOCOL_UDP
1613 || ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS);
1615 udp0 = (void *) (ip0 + 1);
1616 if (ip0->protocol == IP_PROTOCOL_UDP && udp0->checksum == 0)
1618 p0->flags |= (IP_BUFFER_L4_CHECKSUM_COMPUTED
1619 | IP_BUFFER_L4_CHECKSUM_CORRECT);
1623 sum16 = ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip0, &bogus_length);
1625 p0->flags |= (IP_BUFFER_L4_CHECKSUM_COMPUTED
1626 | ((sum16 == 0) << LOG2_IP_BUFFER_L4_CHECKSUM_CORRECT));
1632 ip6_local (vlib_main_t * vm,
1633 vlib_node_runtime_t * node,
1634 vlib_frame_t * frame)
1636 ip6_main_t * im = &ip6_main;
1637 ip_lookup_main_t * lm = &im->lookup_main;
1638 ip_local_next_t next_index;
1639 u32 * from, * to_next, n_left_from, n_left_to_next;
1640 vlib_node_runtime_t * error_node = vlib_node_get_runtime (vm, ip6_input_node.index);
1642 from = vlib_frame_vector_args (frame);
1643 n_left_from = frame->n_vectors;
1644 next_index = node->cached_next_index;
1646 if (node->flags & VLIB_NODE_FLAG_TRACE)
1647 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
1649 while (n_left_from > 0)
1651 vlib_get_next_frame (vm, node, next_index,
1652 to_next, n_left_to_next);
1654 while (n_left_from >= 4 && n_left_to_next >= 2)
1656 vlib_buffer_t * p0, * p1;
1657 ip6_header_t * ip0, * ip1;
1658 udp_header_t * udp0, * udp1;
1659 u32 pi0, ip_len0, udp_len0, flags0, next0;
1660 u32 pi1, ip_len1, udp_len1, flags1, next1;
1661 i32 len_diff0, len_diff1;
1662 u8 error0, type0, good_l4_checksum0;
1663 u8 error1, type1, good_l4_checksum1;
1665 pi0 = to_next[0] = from[0];
1666 pi1 = to_next[1] = from[1];
1670 n_left_to_next -= 2;
1672 p0 = vlib_get_buffer (vm, pi0);
1673 p1 = vlib_get_buffer (vm, pi1);
1675 ip0 = vlib_buffer_get_current (p0);
1676 ip1 = vlib_buffer_get_current (p1);
1678 type0 = lm->builtin_protocol_by_ip_protocol[ip0->protocol];
1679 type1 = lm->builtin_protocol_by_ip_protocol[ip1->protocol];
1681 next0 = lm->local_next_by_ip_protocol[ip0->protocol];
1682 next1 = lm->local_next_by_ip_protocol[ip1->protocol];
1687 good_l4_checksum0 = (flags0 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0;
1688 good_l4_checksum1 = (flags1 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0;
1690 udp0 = ip6_next_header (ip0);
1691 udp1 = ip6_next_header (ip1);
1693 /* Don't verify UDP checksum for packets with explicit zero checksum. */
1694 good_l4_checksum0 |= type0 == IP_BUILTIN_PROTOCOL_UDP && udp0->checksum == 0;
1695 good_l4_checksum1 |= type1 == IP_BUILTIN_PROTOCOL_UDP && udp1->checksum == 0;
1697 good_l4_checksum0 |= type0 == IP_BUILTIN_PROTOCOL_UNKNOWN;
1698 good_l4_checksum1 |= type1 == IP_BUILTIN_PROTOCOL_UNKNOWN;
1700 /* Verify UDP length. */
1701 ip_len0 = clib_net_to_host_u16 (ip0->payload_length);
1702 ip_len1 = clib_net_to_host_u16 (ip1->payload_length);
1703 udp_len0 = clib_net_to_host_u16 (udp0->length);
1704 udp_len1 = clib_net_to_host_u16 (udp1->length);
1706 len_diff0 = ip_len0 - udp_len0;
1707 len_diff1 = ip_len1 - udp_len1;
1709 len_diff0 = type0 == IP_BUILTIN_PROTOCOL_UDP ? len_diff0 : 0;
1710 len_diff1 = type1 == IP_BUILTIN_PROTOCOL_UDP ? len_diff1 : 0;
1712 if (PREDICT_FALSE (type0 != IP_BUILTIN_PROTOCOL_UNKNOWN
1713 && ! good_l4_checksum0
1714 && ! (flags0 & IP_BUFFER_L4_CHECKSUM_COMPUTED)))
1716 flags0 = ip6_tcp_udp_icmp_validate_checksum (vm, p0);
1718 (flags0 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0;
1720 if (PREDICT_FALSE (type1 != IP_BUILTIN_PROTOCOL_UNKNOWN
1721 && ! good_l4_checksum1
1722 && ! (flags1 & IP_BUFFER_L4_CHECKSUM_COMPUTED)))
1724 flags1 = ip6_tcp_udp_icmp_validate_checksum (vm, p1);
1726 (flags1 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0;
1729 error0 = error1 = IP6_ERROR_UNKNOWN_PROTOCOL;
1731 error0 = len_diff0 < 0 ? IP6_ERROR_UDP_LENGTH : error0;
1732 error1 = len_diff1 < 0 ? IP6_ERROR_UDP_LENGTH : error1;
1734 ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_UDP == IP6_ERROR_UDP_CHECKSUM);
1735 ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_ICMP == IP6_ERROR_ICMP_CHECKSUM);
1736 error0 = (! good_l4_checksum0
1737 ? IP6_ERROR_UDP_CHECKSUM + type0
1739 error1 = (! good_l4_checksum1
1740 ? IP6_ERROR_UDP_CHECKSUM + type1
1743 /* Drop packets from unroutable hosts. */
1744 /* If this is a neighbor solicitation (ICMP), skip source RPF check */
1745 if (error0 == IP6_ERROR_UNKNOWN_PROTOCOL && type0 != IP_BUILTIN_PROTOCOL_ICMP)
1747 u32 src_adj_index0 = ip6_src_lookup_for_packet (im, p0, ip0);
1748 error0 = (lm->miss_adj_index == src_adj_index0
1749 ? IP6_ERROR_SRC_LOOKUP_MISS
1752 if (error1 == IP6_ERROR_UNKNOWN_PROTOCOL && type1 != IP_BUILTIN_PROTOCOL_ICMP)
1754 u32 src_adj_index1 = ip6_src_lookup_for_packet (im, p1, ip1);
1755 error1 = (lm->miss_adj_index == src_adj_index1
1756 ? IP6_ERROR_SRC_LOOKUP_MISS
1760 next0 = error0 != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next0;
1761 next1 = error1 != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next1;
1763 p0->error = error_node->errors[error0];
1764 p1->error = error_node->errors[error1];
1766 vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
1767 to_next, n_left_to_next,
1768 pi0, pi1, next0, next1);
1771 while (n_left_from > 0 && n_left_to_next > 0)
1775 udp_header_t * udp0;
1776 u32 pi0, ip_len0, udp_len0, flags0, next0;
1778 u8 error0, type0, good_l4_checksum0;
1780 pi0 = to_next[0] = from[0];
1784 n_left_to_next -= 1;
1786 p0 = vlib_get_buffer (vm, pi0);
1788 ip0 = vlib_buffer_get_current (p0);
1790 type0 = lm->builtin_protocol_by_ip_protocol[ip0->protocol];
1791 next0 = lm->local_next_by_ip_protocol[ip0->protocol];
1795 good_l4_checksum0 = (flags0 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0;
1797 udp0 = ip6_next_header (ip0);
1799 /* Don't verify UDP checksum for packets with explicit zero checksum. */
1800 good_l4_checksum0 |= type0 == IP_BUILTIN_PROTOCOL_UDP && udp0->checksum == 0;
1802 good_l4_checksum0 |= type0 == IP_BUILTIN_PROTOCOL_UNKNOWN;
1804 /* Verify UDP length. */
1805 ip_len0 = clib_net_to_host_u16 (ip0->payload_length);
1806 udp_len0 = clib_net_to_host_u16 (udp0->length);
1808 len_diff0 = ip_len0 - udp_len0;
1810 len_diff0 = type0 == IP_BUILTIN_PROTOCOL_UDP ? len_diff0 : 0;
1812 if (PREDICT_FALSE (type0 != IP_BUILTIN_PROTOCOL_UNKNOWN
1813 && ! good_l4_checksum0
1814 && ! (flags0 & IP_BUFFER_L4_CHECKSUM_COMPUTED)))
1816 flags0 = ip6_tcp_udp_icmp_validate_checksum (vm, p0);
1818 (flags0 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0;
1821 error0 = IP6_ERROR_UNKNOWN_PROTOCOL;
1823 error0 = len_diff0 < 0 ? IP6_ERROR_UDP_LENGTH : error0;
1825 ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_UDP == IP6_ERROR_UDP_CHECKSUM);
1826 ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_ICMP == IP6_ERROR_ICMP_CHECKSUM);
1827 error0 = (! good_l4_checksum0
1828 ? IP6_ERROR_UDP_CHECKSUM + type0
1831 /* If this is a neighbor solicitation (ICMP), skip source RPF check */
1832 if (error0 == IP6_ERROR_UNKNOWN_PROTOCOL && type0 != IP_BUILTIN_PROTOCOL_ICMP)
1834 u32 src_adj_index0 = ip6_src_lookup_for_packet (im, p0, ip0);
1835 error0 = (lm->miss_adj_index == src_adj_index0
1836 ? IP6_ERROR_SRC_LOOKUP_MISS
1840 next0 = error0 != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next0;
1842 p0->error = error_node->errors[error0];
1844 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1845 to_next, n_left_to_next,
1849 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1852 return frame->n_vectors;
1855 VLIB_REGISTER_NODE (ip6_local_node,static) = {
1856 .function = ip6_local,
1857 .name = "ip6-local",
1858 .vector_size = sizeof (u32),
1860 .format_trace = format_ip6_forward_next_trace,
1862 .n_next_nodes = IP_LOCAL_N_NEXT,
1864 [IP_LOCAL_NEXT_DROP] = "error-drop",
1865 [IP_LOCAL_NEXT_PUNT] = "error-punt",
1866 [IP_LOCAL_NEXT_UDP_LOOKUP] = "ip6-udp-lookup",
1867 [IP_LOCAL_NEXT_ICMP] = "ip6-icmp-input",
1871 VLIB_NODE_FUNCTION_MULTIARCH (ip6_local_node, ip6_local)
1873 void ip6_register_protocol (u32 protocol, u32 node_index)
1875 vlib_main_t * vm = vlib_get_main();
1876 ip6_main_t * im = &ip6_main;
1877 ip_lookup_main_t * lm = &im->lookup_main;
1879 ASSERT (protocol < ARRAY_LEN (lm->local_next_by_ip_protocol));
1880 lm->local_next_by_ip_protocol[protocol] = vlib_node_add_next (vm, ip6_local_node.index, node_index);
1884 IP6_DISCOVER_NEIGHBOR_NEXT_DROP,
1885 IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX,
1886 IP6_DISCOVER_NEIGHBOR_N_NEXT,
1887 } ip6_discover_neighbor_next_t;
1890 IP6_DISCOVER_NEIGHBOR_ERROR_DROP,
1891 IP6_DISCOVER_NEIGHBOR_ERROR_REQUEST_SENT,
1892 } ip6_discover_neighbor_error_t;
1895 ip6_discover_neighbor (vlib_main_t * vm,
1896 vlib_node_runtime_t * node,
1897 vlib_frame_t * frame)
1899 vnet_main_t * vnm = vnet_get_main();
1900 ip6_main_t * im = &ip6_main;
1901 ip_lookup_main_t * lm = &im->lookup_main;
1902 u32 * from, * to_next_drop;
1903 uword n_left_from, n_left_to_next_drop;
1904 static f64 time_last_seed_change = -1e100;
1905 static u32 hash_seeds[3];
1906 static uword hash_bitmap[256 / BITS (uword)];
1910 if (node->flags & VLIB_NODE_FLAG_TRACE)
1911 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
1913 time_now = vlib_time_now (vm);
1914 if (time_now - time_last_seed_change > 1e-3)
1917 u32 * r = clib_random_buffer_get_data (&vm->random_buffer,
1918 sizeof (hash_seeds));
1919 for (i = 0; i < ARRAY_LEN (hash_seeds); i++)
1920 hash_seeds[i] = r[i];
1922 /* Mark all hash keys as been not-seen before. */
1923 for (i = 0; i < ARRAY_LEN (hash_bitmap); i++)
1926 time_last_seed_change = time_now;
1929 from = vlib_frame_vector_args (frame);
1930 n_left_from = frame->n_vectors;
1932 while (n_left_from > 0)
1934 vlib_get_next_frame (vm, node, IP6_DISCOVER_NEIGHBOR_NEXT_DROP,
1935 to_next_drop, n_left_to_next_drop);
1937 while (n_left_from > 0 && n_left_to_next_drop > 0)
1941 u32 pi0, adj_index0, a0, b0, c0, m0, sw_if_index0, drop0;
1943 ip_adjacency_t * adj0;
1944 vnet_hw_interface_t * hw_if0;
1949 p0 = vlib_get_buffer (vm, pi0);
1951 adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
1953 ip0 = vlib_buffer_get_current (p0);
1955 adj0 = ip_get_adjacency (lm, adj_index0);
1957 if (adj0->arp.next_hop.ip6.as_u64[0] ||
1958 adj0->arp.next_hop.ip6.as_u64[1]) {
1959 ip0->dst_address.as_u64[0] = adj0->arp.next_hop.ip6.as_u64[0];
1960 ip0->dst_address.as_u64[1] = adj0->arp.next_hop.ip6.as_u64[1];
1967 sw_if_index0 = adj0->rewrite_header.sw_if_index;
1968 vnet_buffer (p0)->sw_if_index[VLIB_TX] = sw_if_index0;
1971 b0 ^= ip0->dst_address.as_u32[0];
1972 c0 ^= ip0->dst_address.as_u32[1];
1974 hash_v3_mix32 (a0, b0, c0);
1976 b0 ^= ip0->dst_address.as_u32[2];
1977 c0 ^= ip0->dst_address.as_u32[3];
1979 hash_v3_finalize32 (a0, b0, c0);
1981 c0 &= BITS (hash_bitmap) - 1;
1982 c0 = c0 / BITS (uword);
1983 m0 = (uword) 1 << (c0 % BITS (uword));
1985 bm0 = hash_bitmap[c0];
1986 drop0 = (bm0 & m0) != 0;
1988 /* Mark it as seen. */
1989 hash_bitmap[c0] = bm0 | m0;
1993 to_next_drop[0] = pi0;
1995 n_left_to_next_drop -= 1;
1997 hw_if0 = vnet_get_sup_hw_interface (vnm, sw_if_index0);
1999 /* If the interface is link-down, drop the pkt */
2000 if (!(hw_if0->flags & VNET_HW_INTERFACE_FLAG_LINK_UP))
2004 node->errors[drop0 ? IP6_DISCOVER_NEIGHBOR_ERROR_DROP
2005 : IP6_DISCOVER_NEIGHBOR_ERROR_REQUEST_SENT];
2011 icmp6_neighbor_solicitation_header_t * h0;
2014 h0 = vlib_packet_template_get_packet
2015 (vm, &im->discover_neighbor_packet_template, &bi0);
2018 * Build ethernet header.
2019 * Choose source address based on destination lookup
2022 ip6_src_address_for_packet (im, p0, &h0->ip.src_address,
2026 * Destination address is a solicited node multicast address.
2027 * We need to fill in
2028 * the low 24 bits with low 24 bits of target's address.
2030 h0->ip.dst_address.as_u8[13] = ip0->dst_address.as_u8[13];
2031 h0->ip.dst_address.as_u8[14] = ip0->dst_address.as_u8[14];
2032 h0->ip.dst_address.as_u8[15] = ip0->dst_address.as_u8[15];
2034 h0->neighbor.target_address = ip0->dst_address;
2036 clib_memcpy (h0->link_layer_option.ethernet_address,
2037 hw_if0->hw_address, vec_len (hw_if0->hw_address));
2039 /* $$$$ appears we need this; why is the checksum non-zero? */
2040 h0->neighbor.icmp.checksum = 0;
2041 h0->neighbor.icmp.checksum =
2042 ip6_tcp_udp_icmp_compute_checksum (vm, 0, &h0->ip,
2045 ASSERT (bogus_length == 0);
2047 vlib_buffer_copy_trace_flag (vm, p0, bi0);
2048 b0 = vlib_get_buffer (vm, bi0);
2049 vnet_buffer (b0)->sw_if_index[VLIB_TX]
2050 = vnet_buffer (p0)->sw_if_index[VLIB_TX];
2052 /* Add rewrite/encap string. */
2053 vnet_rewrite_one_header (adj0[0], h0,
2054 sizeof (ethernet_header_t));
2055 vlib_buffer_advance (b0, -adj0->rewrite_header.data_bytes);
2057 next0 = IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX;
2059 vlib_set_next_frame_buffer (vm, node, next0, bi0);
2063 vlib_put_next_frame (vm, node, IP6_DISCOVER_NEIGHBOR_NEXT_DROP,
2064 n_left_to_next_drop);
2067 return frame->n_vectors;
2070 static char * ip6_discover_neighbor_error_strings[] = {
2071 [IP6_DISCOVER_NEIGHBOR_ERROR_DROP] = "address overflow drops",
2072 [IP6_DISCOVER_NEIGHBOR_ERROR_REQUEST_SENT]
2073 = "neighbor solicitations sent",
2076 VLIB_REGISTER_NODE (ip6_discover_neighbor_node) = {
2077 .function = ip6_discover_neighbor,
2078 .name = "ip6-discover-neighbor",
2079 .vector_size = sizeof (u32),
2081 .format_trace = format_ip6_forward_next_trace,
2083 .n_errors = ARRAY_LEN (ip6_discover_neighbor_error_strings),
2084 .error_strings = ip6_discover_neighbor_error_strings,
2086 .n_next_nodes = IP6_DISCOVER_NEIGHBOR_N_NEXT,
2088 [IP6_DISCOVER_NEIGHBOR_NEXT_DROP] = "error-drop",
2089 [IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX] = "interface-output",
2094 ip6_probe_neighbor (vlib_main_t * vm, ip6_address_t * dst, u32 sw_if_index)
2096 vnet_main_t * vnm = vnet_get_main();
2097 ip6_main_t * im = &ip6_main;
2098 icmp6_neighbor_solicitation_header_t * h;
2099 ip6_address_t * src;
2100 ip_interface_address_t * ia;
2101 ip_adjacency_t * adj;
2102 vnet_hw_interface_t * hi;
2103 vnet_sw_interface_t * si;
2108 si = vnet_get_sw_interface (vnm, sw_if_index);
2110 if (!(si->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP))
2112 return clib_error_return (0, "%U: interface %U down",
2113 format_ip6_address, dst,
2114 format_vnet_sw_if_index_name, vnm,
2118 src = ip6_interface_address_matching_destination (im, dst, sw_if_index, &ia);
2121 vnm->api_errno = VNET_API_ERROR_NO_MATCHING_INTERFACE;
2122 return clib_error_return
2123 (0, "no matching interface address for destination %U (interface %U)",
2124 format_ip6_address, dst,
2125 format_vnet_sw_if_index_name, vnm, sw_if_index);
2128 h = vlib_packet_template_get_packet (vm, &im->discover_neighbor_packet_template, &bi);
2130 hi = vnet_get_sup_hw_interface (vnm, sw_if_index);
2132 /* Destination address is a solicited node multicast address. We need to fill in
2133 the low 24 bits with low 24 bits of target's address. */
2134 h->ip.dst_address.as_u8[13] = dst->as_u8[13];
2135 h->ip.dst_address.as_u8[14] = dst->as_u8[14];
2136 h->ip.dst_address.as_u8[15] = dst->as_u8[15];
2138 h->ip.src_address = src[0];
2139 h->neighbor.target_address = dst[0];
2141 clib_memcpy (h->link_layer_option.ethernet_address, hi->hw_address, vec_len (hi->hw_address));
2143 h->neighbor.icmp.checksum =
2144 ip6_tcp_udp_icmp_compute_checksum (vm, 0, &h->ip, &bogus_length);
2145 ASSERT(bogus_length == 0);
2147 b = vlib_get_buffer (vm, bi);
2148 vnet_buffer (b)->sw_if_index[VLIB_RX] = vnet_buffer (b)->sw_if_index[VLIB_TX] = sw_if_index;
2150 /* Add encapsulation string for software interface (e.g. ethernet header). */
2151 adj = ip_get_adjacency (&im->lookup_main, ia->neighbor_probe_adj_index);
2152 vnet_rewrite_one_header (adj[0], h, sizeof (ethernet_header_t));
2153 vlib_buffer_advance (b, -adj->rewrite_header.data_bytes);
2156 vlib_frame_t * f = vlib_get_frame_to_node (vm, hi->output_node_index);
2157 u32 * to_next = vlib_frame_vector_args (f);
2160 vlib_put_frame_to_node (vm, hi->output_node_index, f);
2163 return /* no error */ 0;
2167 IP6_REWRITE_NEXT_DROP,
2168 } ip6_rewrite_next_t;
2171 ip6_rewrite_inline (vlib_main_t * vm,
2172 vlib_node_runtime_t * node,
2173 vlib_frame_t * frame,
2174 int rewrite_for_locally_received_packets)
2176 ip_lookup_main_t * lm = &ip6_main.lookup_main;
2177 u32 * from = vlib_frame_vector_args (frame);
2178 u32 n_left_from, n_left_to_next, * to_next, next_index;
2179 vlib_node_runtime_t * error_node = vlib_node_get_runtime (vm, ip6_input_node.index);
2180 vlib_rx_or_tx_t adj_rx_tx = rewrite_for_locally_received_packets ? VLIB_RX : VLIB_TX;
2182 n_left_from = frame->n_vectors;
2183 next_index = node->cached_next_index;
2184 u32 cpu_index = os_get_cpu_number();
2186 while (n_left_from > 0)
2188 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
2190 while (n_left_from >= 4 && n_left_to_next >= 2)
2192 ip_adjacency_t * adj0, * adj1;
2193 vlib_buffer_t * p0, * p1;
2194 ip6_header_t * ip0, * ip1;
2195 u32 pi0, rw_len0, next0, error0, adj_index0;
2196 u32 pi1, rw_len1, next1, error1, adj_index1;
2198 /* Prefetch next iteration. */
2200 vlib_buffer_t * p2, * p3;
2202 p2 = vlib_get_buffer (vm, from[2]);
2203 p3 = vlib_get_buffer (vm, from[3]);
2205 vlib_prefetch_buffer_header (p2, LOAD);
2206 vlib_prefetch_buffer_header (p3, LOAD);
2208 CLIB_PREFETCH (p2->pre_data, 32, STORE);
2209 CLIB_PREFETCH (p3->pre_data, 32, STORE);
2211 CLIB_PREFETCH (p2->data, sizeof (ip0[0]), STORE);
2212 CLIB_PREFETCH (p3->data, sizeof (ip0[0]), STORE);
2215 pi0 = to_next[0] = from[0];
2216 pi1 = to_next[1] = from[1];
2221 n_left_to_next -= 2;
2223 p0 = vlib_get_buffer (vm, pi0);
2224 p1 = vlib_get_buffer (vm, pi1);
2226 adj_index0 = vnet_buffer (p0)->ip.adj_index[adj_rx_tx];
2227 adj_index1 = vnet_buffer (p1)->ip.adj_index[adj_rx_tx];
2229 /* We should never rewrite a pkt using the MISS adjacency */
2230 ASSERT(adj_index0 && adj_index1);
2232 ip0 = vlib_buffer_get_current (p0);
2233 ip1 = vlib_buffer_get_current (p1);
2235 error0 = error1 = IP6_ERROR_NONE;
2237 if (! rewrite_for_locally_received_packets)
2239 i32 hop_limit0 = ip0->hop_limit, hop_limit1 = ip1->hop_limit;
2241 /* Input node should have reject packets with hop limit 0. */
2242 ASSERT (ip0->hop_limit > 0);
2243 ASSERT (ip1->hop_limit > 0);
2248 ip0->hop_limit = hop_limit0;
2249 ip1->hop_limit = hop_limit1;
2251 error0 = hop_limit0 <= 0 ? IP6_ERROR_TIME_EXPIRED : error0;
2252 error1 = hop_limit1 <= 0 ? IP6_ERROR_TIME_EXPIRED : error1;
2255 adj0 = ip_get_adjacency (lm, adj_index0);
2256 adj1 = ip_get_adjacency (lm, adj_index1);
2258 if (rewrite_for_locally_received_packets)
2261 * If someone sends e.g. an icmp6 w/ src = dst = interface addr,
2262 * we end up here with a local adjacency in hand
2264 if (PREDICT_FALSE(adj0->lookup_next_index
2265 == IP_LOOKUP_NEXT_LOCAL))
2266 error0 = IP6_ERROR_SPOOFED_LOCAL_PACKETS;
2267 if (PREDICT_FALSE(adj1->lookup_next_index
2268 == IP_LOOKUP_NEXT_LOCAL))
2269 error1 = IP6_ERROR_SPOOFED_LOCAL_PACKETS;
2272 rw_len0 = adj0[0].rewrite_header.data_bytes;
2273 rw_len1 = adj1[0].rewrite_header.data_bytes;
2275 vlib_increment_combined_counter (&lm->adjacency_counters,
2278 /* packet increment */ 0,
2279 /* byte increment */ rw_len0);
2280 vlib_increment_combined_counter (&lm->adjacency_counters,
2283 /* packet increment */ 0,
2284 /* byte increment */ rw_len1);
2286 /* Check MTU of outgoing interface. */
2287 error0 = (vlib_buffer_length_in_chain (vm, p0) > adj0[0].rewrite_header.max_l3_packet_bytes
2288 ? IP6_ERROR_MTU_EXCEEDED
2290 error1 = (vlib_buffer_length_in_chain (vm, p1) > adj1[0].rewrite_header.max_l3_packet_bytes
2291 ? IP6_ERROR_MTU_EXCEEDED
2294 p0->current_data -= rw_len0;
2295 p1->current_data -= rw_len1;
2297 p0->current_length += rw_len0;
2298 p1->current_length += rw_len1;
2300 vnet_buffer (p0)->sw_if_index[VLIB_TX] = adj0[0].rewrite_header.sw_if_index;
2301 vnet_buffer (p1)->sw_if_index[VLIB_TX] = adj1[0].rewrite_header.sw_if_index;
2303 next0 = (error0 == IP6_ERROR_NONE) ?
2304 adj0[0].rewrite_header.next_index : IP6_REWRITE_NEXT_DROP;
2305 next1 = (error1 == IP6_ERROR_NONE) ?
2306 adj1[0].rewrite_header.next_index : IP6_REWRITE_NEXT_DROP;
2308 /* Guess we are only writing on simple Ethernet header. */
2309 vnet_rewrite_two_headers (adj0[0], adj1[0],
2311 sizeof (ethernet_header_t));
2313 vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
2314 to_next, n_left_to_next,
2315 pi0, pi1, next0, next1);
2318 while (n_left_from > 0 && n_left_to_next > 0)
2320 ip_adjacency_t * adj0;
2324 u32 adj_index0, next0, error0;
2326 pi0 = to_next[0] = from[0];
2328 p0 = vlib_get_buffer (vm, pi0);
2330 adj_index0 = vnet_buffer (p0)->ip.adj_index[adj_rx_tx];
2332 /* We should never rewrite a pkt using the MISS adjacency */
2335 adj0 = ip_get_adjacency (lm, adj_index0);
2337 ip0 = vlib_buffer_get_current (p0);
2339 error0 = IP6_ERROR_NONE;
2341 /* Check hop limit */
2342 if (! rewrite_for_locally_received_packets)
2344 i32 hop_limit0 = ip0->hop_limit;
2346 ASSERT (ip0->hop_limit > 0);
2350 ip0->hop_limit = hop_limit0;
2352 error0 = hop_limit0 <= 0 ? IP6_ERROR_TIME_EXPIRED : error0;
2355 if (rewrite_for_locally_received_packets)
2357 if (PREDICT_FALSE(adj0->lookup_next_index
2358 == IP_LOOKUP_NEXT_LOCAL))
2359 error0 = IP6_ERROR_SPOOFED_LOCAL_PACKETS;
2362 /* Guess we are only writing on simple Ethernet header. */
2363 vnet_rewrite_one_header (adj0[0], ip0, sizeof (ethernet_header_t));
2365 /* Update packet buffer attributes/set output interface. */
2366 rw_len0 = adj0[0].rewrite_header.data_bytes;
2368 vlib_increment_combined_counter (&lm->adjacency_counters,
2371 /* packet increment */ 0,
2372 /* byte increment */ rw_len0);
2374 /* Check MTU of outgoing interface. */
2375 error0 = (vlib_buffer_length_in_chain (vm, p0) > adj0[0].rewrite_header.max_l3_packet_bytes
2376 ? IP6_ERROR_MTU_EXCEEDED
2379 p0->current_data -= rw_len0;
2380 p0->current_length += rw_len0;
2381 vnet_buffer (p0)->sw_if_index[VLIB_TX] = adj0[0].rewrite_header.sw_if_index;
2383 next0 = (error0 == IP6_ERROR_NONE) ?
2384 adj0[0].rewrite_header.next_index : IP6_REWRITE_NEXT_DROP;
2386 p0->error = error_node->errors[error0];
2391 n_left_to_next -= 1;
2393 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
2394 to_next, n_left_to_next,
2398 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2401 /* Need to do trace after rewrites to pick up new packet data. */
2402 if (node->flags & VLIB_NODE_FLAG_TRACE)
2403 ip6_forward_next_trace (vm, node, frame, adj_rx_tx);
2405 return frame->n_vectors;
2409 ip6_rewrite_transit (vlib_main_t * vm,
2410 vlib_node_runtime_t * node,
2411 vlib_frame_t * frame)
2413 return ip6_rewrite_inline (vm, node, frame,
2414 /* rewrite_for_locally_received_packets */ 0);
2418 ip6_rewrite_local (vlib_main_t * vm,
2419 vlib_node_runtime_t * node,
2420 vlib_frame_t * frame)
2422 return ip6_rewrite_inline (vm, node, frame,
2423 /* rewrite_for_locally_received_packets */ 1);
2426 VLIB_REGISTER_NODE (ip6_rewrite_node) = {
2427 .function = ip6_rewrite_transit,
2428 .name = "ip6-rewrite",
2429 .vector_size = sizeof (u32),
2431 .format_trace = format_ip6_forward_next_trace,
2435 [IP6_REWRITE_NEXT_DROP] = "error-drop",
2439 VLIB_NODE_FUNCTION_MULTIARCH (ip6_rewrite_node, ip6_rewrite_transit)
2441 VLIB_REGISTER_NODE (ip6_rewrite_local_node,static) = {
2442 .function = ip6_rewrite_local,
2443 .name = "ip6-rewrite-local",
2444 .vector_size = sizeof (u32),
2446 .sibling_of = "ip6-rewrite",
2448 .format_trace = format_ip6_forward_next_trace,
2452 [IP6_REWRITE_NEXT_DROP] = "error-drop",
2456 VLIB_NODE_FUNCTION_MULTIARCH (ip6_rewrite_local_node, ip6_rewrite_local)
2458 /* Global IP6 main. */
2459 ip6_main_t ip6_main;
2461 static clib_error_t *
2462 ip6_lookup_init (vlib_main_t * vm)
2464 ip6_main_t * im = &ip6_main;
2467 for (i = 0; i < ARRAY_LEN (im->fib_masks); i++)
2474 for (j = 0; j < i0; j++)
2475 im->fib_masks[i].as_u32[j] = ~0;
2478 im->fib_masks[i].as_u32[i0] = clib_host_to_net_u32 (pow2_mask (i1) << (32 - i1));
2481 ip_lookup_init (&im->lookup_main, /* is_ip6 */ 1);
2483 if (im->lookup_table_nbuckets == 0)
2484 im->lookup_table_nbuckets = IP6_FIB_DEFAULT_HASH_NUM_BUCKETS;
2486 im->lookup_table_nbuckets = 1<< max_log2 (im->lookup_table_nbuckets);
2488 if (im->lookup_table_size == 0)
2489 im->lookup_table_size = IP6_FIB_DEFAULT_HASH_MEMORY_SIZE;
2491 BV(clib_bihash_init) (&im->ip6_lookup_table, "ip6 lookup table",
2492 im->lookup_table_nbuckets,
2493 im->lookup_table_size);
2495 /* Create FIB with index 0 and table id of 0. */
2496 find_ip6_fib_by_table_index_or_id (im, /* table id */ 0, IP6_ROUTE_FLAG_TABLE_ID);
2500 pn = pg_get_node (ip6_lookup_node.index);
2501 pn->unformat_edit = unformat_pg_ip6_header;
2505 icmp6_neighbor_solicitation_header_t p;
2507 memset (&p, 0, sizeof (p));
2509 p.ip.ip_version_traffic_class_and_flow_label = clib_host_to_net_u32 (0x6 << 28);
2510 p.ip.payload_length = clib_host_to_net_u16 (sizeof (p)
2511 - STRUCT_OFFSET_OF (icmp6_neighbor_solicitation_header_t, neighbor));
2512 p.ip.protocol = IP_PROTOCOL_ICMP6;
2513 p.ip.hop_limit = 255;
2514 ip6_set_solicited_node_multicast_address (&p.ip.dst_address, 0);
2516 p.neighbor.icmp.type = ICMP6_neighbor_solicitation;
2518 p.link_layer_option.header.type = ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address;
2519 p.link_layer_option.header.n_data_u64s = sizeof (p.link_layer_option) / sizeof (u64);
2521 vlib_packet_template_init (vm,
2522 &im->discover_neighbor_packet_template,
2524 /* alloc chunk size */ 8,
2525 "ip6 neighbor discovery");
2531 VLIB_INIT_FUNCTION (ip6_lookup_init);
2533 static clib_error_t *
2534 add_del_ip6_interface_table (vlib_main_t * vm,
2535 unformat_input_t * input,
2536 vlib_cli_command_t * cmd)
2538 vnet_main_t * vnm = vnet_get_main();
2539 clib_error_t * error = 0;
2540 u32 sw_if_index, table_id;
2544 if (! unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
2546 error = clib_error_return (0, "unknown interface `%U'",
2547 format_unformat_error, input);
2551 if (unformat (input, "%d", &table_id))
2555 error = clib_error_return (0, "expected table id `%U'",
2556 format_unformat_error, input);
2561 ip6_main_t * im = &ip6_main;
2563 find_ip6_fib_by_table_index_or_id (im, table_id, IP6_ROUTE_FLAG_TABLE_ID);
2567 vec_validate (im->fib_index_by_sw_if_index, sw_if_index);
2568 im->fib_index_by_sw_if_index[sw_if_index] = fib->index;
2576 VLIB_CLI_COMMAND (set_interface_ip_table_command, static) = {
2577 .path = "set interface ip6 table",
2578 .function = add_del_ip6_interface_table,
2579 .short_help = "set interface ip6 table <intfc> <table-id>"
2583 ip6_link_local_address_from_ethernet_mac_address (ip6_address_t *ip,
2586 ip->as_u64[0] = clib_host_to_net_u64 (0xFE80000000000000ULL);
2587 /* Invert the "u" bit */
2588 ip->as_u8 [8] = mac[0] ^ (1<<1);
2589 ip->as_u8 [9] = mac[1];
2590 ip->as_u8 [10] = mac[2];
2591 ip->as_u8 [11] = 0xFF;
2592 ip->as_u8 [12] = 0xFE;
2593 ip->as_u8 [13] = mac[3];
2594 ip->as_u8 [14] = mac[4];
2595 ip->as_u8 [15] = mac[5];
2599 ip6_ethernet_mac_address_from_link_local_address (u8 *mac,
2602 /* Invert the previously inverted "u" bit */
2603 mac[0] = ip->as_u8 [8] ^ (1<<1);
2604 mac[1] = ip->as_u8 [9];
2605 mac[2] = ip->as_u8 [10];
2606 mac[3] = ip->as_u8 [13];
2607 mac[4] = ip->as_u8 [14];
2608 mac[5] = ip->as_u8 [15];
2611 static clib_error_t *
2612 test_ip6_link_command_fn (vlib_main_t * vm,
2613 unformat_input_t * input,
2614 vlib_cli_command_t * cmd)
2617 ip6_address_t _a, *a = &_a;
2619 if (unformat (input, "%U", unformat_ethernet_address, mac))
2621 ip6_link_local_address_from_ethernet_mac_address (a, mac);
2622 vlib_cli_output (vm, "Link local address: %U",
2623 format_ip6_address, a);
2624 ip6_ethernet_mac_address_from_link_local_address (mac, a);
2625 vlib_cli_output (vm, "Original MAC address: %U",
2626 format_ethernet_address, mac);
2632 VLIB_CLI_COMMAND (test_link_command, static) = {
2633 .path = "test ip6 link",
2634 .function = test_ip6_link_command_fn,
2635 .short_help = "test ip6 link <mac-address>",
2638 int vnet_set_ip6_flow_hash (u32 table_id, u32 flow_hash_config)
2640 ip6_main_t * im6 = &ip6_main;
2642 uword * p = hash_get (im6->fib_index_by_table_id, table_id);
2647 fib = vec_elt_at_index (im6->fibs, p[0]);
2649 fib->flow_hash_config = flow_hash_config;
2653 static clib_error_t *
2654 set_ip6_flow_hash_command_fn (vlib_main_t * vm,
2655 unformat_input_t * input,
2656 vlib_cli_command_t * cmd)
2660 u32 flow_hash_config = 0;
2663 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) {
2664 if (unformat (input, "table %d", &table_id))
2667 else if (unformat (input, #a)) { flow_hash_config |= v; matched=1;}
2668 foreach_flow_hash_bit
2674 return clib_error_return (0, "unknown input `%U'",
2675 format_unformat_error, input);
2677 rv = vnet_set_ip6_flow_hash (table_id, flow_hash_config);
2684 return clib_error_return (0, "no such FIB table %d", table_id);
2687 clib_warning ("BUG: illegal flow hash config 0x%x", flow_hash_config);
2694 VLIB_CLI_COMMAND (set_ip6_flow_hash_command, static) = {
2695 .path = "set ip6 flow-hash",
2697 "set ip table flow-hash table <fib-id> src dst sport dport proto reverse",
2698 .function = set_ip6_flow_hash_command_fn,
2701 static clib_error_t *
2702 show_ip6_local_command_fn (vlib_main_t * vm,
2703 unformat_input_t * input,
2704 vlib_cli_command_t * cmd)
2706 ip6_main_t * im = &ip6_main;
2707 ip_lookup_main_t * lm = &im->lookup_main;
2710 vlib_cli_output (vm, "Protocols handled by ip6_local");
2711 for (i = 0; i < ARRAY_LEN(lm->local_next_by_ip_protocol); i++)
2713 if (lm->local_next_by_ip_protocol[i] != IP_LOCAL_NEXT_PUNT)
2714 vlib_cli_output (vm, "%d", i);
2721 VLIB_CLI_COMMAND (show_ip_local, static) = {
2722 .path = "show ip6 local",
2723 .function = show_ip6_local_command_fn,
2724 .short_help = "Show ip6 local protocol table",
2727 int vnet_set_ip6_classify_intfc (vlib_main_t * vm, u32 sw_if_index,
2730 vnet_main_t * vnm = vnet_get_main();
2731 vnet_interface_main_t * im = &vnm->interface_main;
2732 ip6_main_t * ipm = &ip6_main;
2733 ip_lookup_main_t * lm = &ipm->lookup_main;
2734 vnet_classify_main_t * cm = &vnet_classify_main;
2736 if (pool_is_free_index (im->sw_interfaces, sw_if_index))
2737 return VNET_API_ERROR_NO_MATCHING_INTERFACE;
2739 if (table_index != ~0 && pool_is_free_index (cm->tables, table_index))
2740 return VNET_API_ERROR_NO_SUCH_ENTRY;
2742 vec_validate (lm->classify_table_index_by_sw_if_index, sw_if_index);
2743 lm->classify_table_index_by_sw_if_index [sw_if_index] = table_index;
2748 static clib_error_t *
2749 set_ip6_classify_command_fn (vlib_main_t * vm,
2750 unformat_input_t * input,
2751 vlib_cli_command_t * cmd)
2753 u32 table_index = ~0;
2754 int table_index_set = 0;
2755 u32 sw_if_index = ~0;
2758 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) {
2759 if (unformat (input, "table-index %d", &table_index))
2760 table_index_set = 1;
2761 else if (unformat (input, "intfc %U", unformat_vnet_sw_interface,
2762 vnet_get_main(), &sw_if_index))
2768 if (table_index_set == 0)
2769 return clib_error_return (0, "classify table-index must be specified");
2771 if (sw_if_index == ~0)
2772 return clib_error_return (0, "interface / subif must be specified");
2774 rv = vnet_set_ip6_classify_intfc (vm, sw_if_index, table_index);
2781 case VNET_API_ERROR_NO_MATCHING_INTERFACE:
2782 return clib_error_return (0, "No such interface");
2784 case VNET_API_ERROR_NO_SUCH_ENTRY:
2785 return clib_error_return (0, "No such classifier table");
2790 VLIB_CLI_COMMAND (set_ip6_classify_command, static) = {
2791 .path = "set ip6 classify",
2793 "set ip6 classify intfc <int> table-index <index>",
2794 .function = set_ip6_classify_command_fn,
2797 static clib_error_t *
2798 ip6_config (vlib_main_t * vm, unformat_input_t * input)
2800 ip6_main_t * im = &ip6_main;
2805 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) {
2806 if (unformat (input, "hash-buckets %d", &tmp))
2808 else if (unformat (input, "heap-size %dm", &tmp))
2809 heapsize = ((u64)tmp) << 20;
2810 else if (unformat (input, "heap-size %dM", &tmp))
2811 heapsize = ((u64)tmp) << 20;
2812 else if (unformat (input, "heap-size %dg", &tmp))
2813 heapsize = ((u64)tmp) << 30;
2814 else if (unformat (input, "heap-size %dG", &tmp))
2815 heapsize = ((u64)tmp) << 30;
2817 return clib_error_return (0, "unknown input '%U'",
2818 format_unformat_error, input);
2821 im->lookup_table_nbuckets = nbuckets;
2822 im->lookup_table_size = heapsize;
2827 VLIB_EARLY_CONFIG_FUNCTION (ip6_config, "ip6");