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_forward_next_trace (vlib_main_t * vm,
658 vlib_node_runtime_t * node,
659 vlib_frame_t * frame,
660 vlib_rx_or_tx_t which_adj_index);
663 ip6_lookup_inline (vlib_main_t * vm,
664 vlib_node_runtime_t * node,
665 vlib_frame_t * frame,
668 ip6_main_t * im = &ip6_main;
669 ip_lookup_main_t * lm = &im->lookup_main;
670 vlib_combined_counter_main_t * cm = &im->lookup_main.adjacency_counters;
671 u32 n_left_from, n_left_to_next, * from, * to_next;
672 ip_lookup_next_t next;
673 u32 cpu_index = os_get_cpu_number();
675 from = vlib_frame_vector_args (frame);
676 n_left_from = frame->n_vectors;
677 next = node->cached_next_index;
679 while (n_left_from > 0)
681 vlib_get_next_frame (vm, node, next,
682 to_next, n_left_to_next);
684 while (n_left_from >= 4 && n_left_to_next >= 2)
686 vlib_buffer_t * p0, * p1;
687 u32 pi0, pi1, adj_index0, adj_index1, wrong_next;
688 ip_lookup_next_t next0, next1;
689 ip6_header_t * ip0, * ip1;
690 ip_adjacency_t * adj0, * adj1;
691 ip6_address_t * dst_addr0, * dst_addr1;
692 u32 fib_index0, fib_index1;
693 u32 flow_hash_config0, flow_hash_config1;
695 /* Prefetch next iteration. */
697 vlib_buffer_t * p2, * p3;
699 p2 = vlib_get_buffer (vm, from[2]);
700 p3 = vlib_get_buffer (vm, from[3]);
702 vlib_prefetch_buffer_header (p2, LOAD);
703 vlib_prefetch_buffer_header (p3, LOAD);
704 CLIB_PREFETCH (p2->data, sizeof (ip0[0]), LOAD);
705 CLIB_PREFETCH (p3->data, sizeof (ip0[0]), LOAD);
708 pi0 = to_next[0] = from[0];
709 pi1 = to_next[1] = from[1];
711 p0 = vlib_get_buffer (vm, pi0);
712 p1 = vlib_get_buffer (vm, pi1);
714 ip0 = vlib_buffer_get_current (p0);
715 ip1 = vlib_buffer_get_current (p1);
719 ip_adjacency_t * iadj0, * iadj1;
720 iadj0 = ip_get_adjacency (lm, vnet_buffer(p0)->ip.adj_index[VLIB_TX]);
721 iadj1 = ip_get_adjacency (lm, vnet_buffer(p1)->ip.adj_index[VLIB_TX]);
722 dst_addr0 = &iadj0->indirect.next_hop.ip6;
723 dst_addr1 = &iadj1->indirect.next_hop.ip6;
727 dst_addr0 = &ip0->dst_address;
728 dst_addr1 = &ip1->dst_address;
731 fib_index0 = vec_elt (im->fib_index_by_sw_if_index, vnet_buffer (p0)->sw_if_index[VLIB_RX]);
732 fib_index1 = vec_elt (im->fib_index_by_sw_if_index, vnet_buffer (p1)->sw_if_index[VLIB_RX]);
734 fib_index0 = (vnet_buffer(p0)->sw_if_index[VLIB_TX] == (u32)~0) ?
735 fib_index0 : vnet_buffer(p0)->sw_if_index[VLIB_TX];
736 fib_index1 = (vnet_buffer(p1)->sw_if_index[VLIB_TX] == (u32)~0) ?
737 fib_index1 : vnet_buffer(p1)->sw_if_index[VLIB_TX];
739 adj_index0 = ip6_fib_lookup_with_table (im, fib_index0, dst_addr0);
740 adj_index1 = ip6_fib_lookup_with_table (im, fib_index1, dst_addr1);
742 adj0 = ip_get_adjacency (lm, adj_index0);
743 adj1 = ip_get_adjacency (lm, adj_index1);
745 if (PREDICT_FALSE (adj0->explicit_fib_index != ~0))
747 adj_index0 = ip6_fib_lookup_with_table
748 (im, adj0->explicit_fib_index, dst_addr0);
749 adj0 = ip_get_adjacency (lm, adj_index0);
751 if (PREDICT_FALSE (adj1->explicit_fib_index != ~0))
753 adj_index1 = ip6_fib_lookup_with_table
754 (im, adj1->explicit_fib_index, dst_addr1);
755 adj1 = ip_get_adjacency (lm, adj_index1);
758 next0 = adj0->lookup_next_index;
759 next1 = adj1->lookup_next_index;
761 /* Only process the HBH Option Header if explicitly configured to do so */
762 next0 = (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS) && im->hbh_enabled &&
763 adj_index0 ? IP_LOOKUP_NEXT_HOP_BY_HOP : adj0->lookup_next_index;
764 next1 = (ip1->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS) && im->hbh_enabled &&
765 adj_index1 ? IP_LOOKUP_NEXT_HOP_BY_HOP : adj1->lookup_next_index;
767 vnet_buffer (p0)->ip.flow_hash =
768 vnet_buffer(p1)->ip.flow_hash = 0;
770 if (PREDICT_FALSE(adj0->n_adj > 1))
773 vec_elt_at_index (im->fibs,fib_index0)->flow_hash_config;
774 vnet_buffer (p0)->ip.flow_hash =
775 ip6_compute_flow_hash (ip0, flow_hash_config0);
778 if (PREDICT_FALSE(adj1->n_adj > 1))
781 vec_elt_at_index (im->fibs,fib_index0)->flow_hash_config;
783 vnet_buffer (p1)->ip.flow_hash =
784 ip6_compute_flow_hash (ip1, flow_hash_config1);
787 ASSERT (adj0->n_adj > 0);
788 ASSERT (adj1->n_adj > 0);
789 ASSERT (is_pow2 (adj0->n_adj));
790 ASSERT (is_pow2 (adj1->n_adj));
791 adj_index0 += (vnet_buffer (p0)->ip.flow_hash & (adj0->n_adj - 1));
792 adj_index1 += (vnet_buffer (p1)->ip.flow_hash & (adj1->n_adj - 1));
794 vnet_buffer (p0)->ip.adj_index[VLIB_TX] = adj_index0;
795 vnet_buffer (p1)->ip.adj_index[VLIB_TX] = adj_index1;
797 vlib_increment_combined_counter
798 (cm, cpu_index, adj_index0, 1,
799 vlib_buffer_length_in_chain (vm, p0));
800 vlib_increment_combined_counter
801 (cm, cpu_index, adj_index1, 1,
802 vlib_buffer_length_in_chain (vm, p1));
809 wrong_next = (next0 != next) + 2*(next1 != next);
810 if (PREDICT_FALSE (wrong_next != 0))
819 vlib_set_next_frame_buffer (vm, node, next0, pi0);
826 vlib_set_next_frame_buffer (vm, node, next1, pi1);
833 vlib_set_next_frame_buffer (vm, node, next0, pi0);
834 vlib_set_next_frame_buffer (vm, node, next1, pi1);
838 vlib_put_next_frame (vm, node, next, n_left_to_next);
840 vlib_get_next_frame (vm, node, next, to_next, n_left_to_next);
846 while (n_left_from > 0 && n_left_to_next > 0)
851 ip_lookup_next_t next0;
852 ip_adjacency_t * adj0;
853 ip6_address_t * dst_addr0;
854 u32 fib_index0, flow_hash_config0;
859 p0 = vlib_get_buffer (vm, pi0);
861 ip0 = vlib_buffer_get_current (p0);
865 ip_adjacency_t * iadj0;
866 iadj0 = ip_get_adjacency (lm, vnet_buffer(p0)->ip.adj_index[VLIB_TX]);
867 dst_addr0 = &iadj0->indirect.next_hop.ip6;
871 dst_addr0 = &ip0->dst_address;
874 fib_index0 = vec_elt (im->fib_index_by_sw_if_index, vnet_buffer (p0)->sw_if_index[VLIB_RX]);
875 fib_index0 = (vnet_buffer(p0)->sw_if_index[VLIB_TX] == (u32)~0) ?
876 fib_index0 : vnet_buffer(p0)->sw_if_index[VLIB_TX];
879 vec_elt_at_index (im->fibs,fib_index0)->flow_hash_config;
881 adj_index0 = ip6_fib_lookup_with_table (im, fib_index0, dst_addr0);
883 adj0 = ip_get_adjacency (lm, adj_index0);
885 if (PREDICT_FALSE (adj0->explicit_fib_index != ~0))
887 adj_index0 = ip6_fib_lookup_with_table
888 (im, adj0->explicit_fib_index, dst_addr0);
889 adj0 = ip_get_adjacency (lm, adj_index0);
892 /* Only process the HBH Option Header if explicitly configured to do so */
893 next0 = (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS) && im->hbh_enabled &&
894 adj_index0 ? IP_LOOKUP_NEXT_HOP_BY_HOP : adj0->lookup_next_index;
896 vnet_buffer (p0)->ip.flow_hash = 0;
898 if (PREDICT_FALSE(adj0->n_adj > 1))
901 vec_elt_at_index (im->fibs,fib_index0)->flow_hash_config;
902 vnet_buffer (p0)->ip.flow_hash =
903 ip6_compute_flow_hash (ip0, flow_hash_config0);
906 ASSERT (adj0->n_adj > 0);
907 ASSERT (is_pow2 (adj0->n_adj));
908 adj_index0 += (vnet_buffer (p0)->ip.flow_hash & (adj0->n_adj - 1));
910 vnet_buffer (p0)->ip.adj_index[VLIB_TX] = adj_index0;
912 vlib_increment_combined_counter
913 (cm, cpu_index, adj_index0, 1,
914 vlib_buffer_length_in_chain (vm, p0));
921 if (PREDICT_FALSE (next0 != next))
924 vlib_put_next_frame (vm, node, next, n_left_to_next);
926 vlib_get_next_frame (vm, node, next,
927 to_next, n_left_to_next);
934 vlib_put_next_frame (vm, node, next, n_left_to_next);
937 if (node->flags & VLIB_NODE_FLAG_TRACE)
938 ip6_forward_next_trace(vm, node, frame, VLIB_TX);
940 return frame->n_vectors;
943 void ip6_adjacency_set_interface_route (vnet_main_t * vnm,
944 ip_adjacency_t * adj,
946 u32 if_address_index)
948 vnet_hw_interface_t * hw = vnet_get_sup_hw_interface (vnm, sw_if_index);
952 if (hw->hw_class_index == ethernet_hw_interface_class.index
953 || hw->hw_class_index == srp_hw_interface_class.index)
955 n = IP_LOOKUP_NEXT_ARP;
956 node_index = ip6_discover_neighbor_node.index;
957 adj->if_address_index = if_address_index;
958 adj->arp.next_hop.ip6.as_u64[0] = 0;
959 adj->arp.next_hop.ip6.as_u64[1] = 0;
963 n = IP_LOOKUP_NEXT_REWRITE;
964 node_index = ip6_rewrite_node.index;
967 adj->lookup_next_index = n;
968 adj->explicit_fib_index = ~0;
970 vnet_rewrite_for_sw_interface
972 VNET_L3_PACKET_TYPE_IP6,
975 VNET_REWRITE_FOR_SW_INTERFACE_ADDRESS_BROADCAST,
976 &adj->rewrite_header,
977 sizeof (adj->rewrite_data));
981 ip6_add_interface_routes (vnet_main_t * vnm, u32 sw_if_index,
982 ip6_main_t * im, u32 fib_index,
983 ip_interface_address_t * a)
985 ip_lookup_main_t * lm = &im->lookup_main;
986 ip_adjacency_t * adj;
987 ip6_address_t * address = ip_interface_address_get_address (lm, a);
988 ip6_add_del_route_args_t x;
989 vnet_hw_interface_t * hw_if = vnet_get_sup_hw_interface (vnm, sw_if_index);
990 u32 classify_table_index;
992 /* Add e.g. 1.0.0.0/8 as interface route (arp for Ethernet). */
993 x.table_index_or_table_id = fib_index;
994 x.flags = (IP6_ROUTE_FLAG_ADD
995 | IP6_ROUTE_FLAG_FIB_INDEX
996 | IP6_ROUTE_FLAG_NO_REDISTRIBUTE);
997 x.dst_address = address[0];
998 x.dst_address_length = a->address_length;
1002 a->neighbor_probe_adj_index = ~0;
1003 if (a->address_length < 128)
1005 adj = ip_add_adjacency (lm, /* template */ 0, /* block size */ 1,
1007 ip6_adjacency_set_interface_route (vnm, adj, sw_if_index, a - lm->if_address_pool);
1008 ip_call_add_del_adjacency_callbacks (lm, x.adj_index, /* is_del */ 0);
1009 ip6_add_del_route (im, &x);
1010 a->neighbor_probe_adj_index = x.adj_index;
1013 /* Add e.g. ::1/128 as local to this host. */
1014 adj = ip_add_adjacency (lm, /* template */ 0, /* block size */ 1,
1017 classify_table_index = ~0;
1018 if (sw_if_index < vec_len (lm->classify_table_index_by_sw_if_index))
1019 classify_table_index = lm->classify_table_index_by_sw_if_index [sw_if_index];
1020 if (classify_table_index != (u32) ~0)
1022 adj->lookup_next_index = IP_LOOKUP_NEXT_CLASSIFY;
1023 adj->classify.table_index = classify_table_index;
1026 adj->lookup_next_index = IP_LOOKUP_NEXT_LOCAL;
1028 adj->if_address_index = a - lm->if_address_pool;
1029 adj->rewrite_header.sw_if_index = sw_if_index;
1030 adj->rewrite_header.max_l3_packet_bytes = hw_if->max_l3_packet_bytes[VLIB_RX];
1031 adj->rewrite_header.data_bytes = 0;
1032 ip_call_add_del_adjacency_callbacks (lm, x.adj_index, /* is_del */ 0);
1033 x.dst_address_length = 128;
1034 ip6_add_del_route (im, &x);
1038 ip6_del_interface_routes (ip6_main_t * im, u32 fib_index,
1039 ip6_address_t * address, u32 address_length)
1041 ip6_add_del_route_args_t x;
1043 /* Add e.g. 1.0.0.0/8 as interface route (arp for Ethernet). */
1044 x.table_index_or_table_id = fib_index;
1045 x.flags = (IP6_ROUTE_FLAG_DEL
1046 | IP6_ROUTE_FLAG_FIB_INDEX
1047 | IP6_ROUTE_FLAG_NO_REDISTRIBUTE);
1048 x.dst_address = address[0];
1049 x.dst_address_length = address_length;
1054 if (address_length < 128)
1056 /* Don't wipe out fe80::0/64 */
1057 if (address_length != 64 ||
1058 address[0].as_u64[0] != clib_net_to_host_u64(0xfe80000000000000ULL))
1059 ip6_add_del_route (im, &x);
1062 x.dst_address_length = 128;
1063 ip6_add_del_route (im, &x);
1065 ip6_delete_matching_routes (im,
1067 IP6_ROUTE_FLAG_FIB_INDEX,
1074 ip6_address_t address;
1076 } ip6_interface_address_t;
1078 static clib_error_t *
1079 ip6_add_del_interface_address_internal (vlib_main_t * vm,
1081 ip6_address_t * new_address,
1087 static clib_error_t *
1088 ip6_add_del_interface_address_internal (vlib_main_t * vm,
1090 ip6_address_t * address,
1096 vnet_main_t * vnm = vnet_get_main();
1097 ip6_main_t * im = &ip6_main;
1098 ip_lookup_main_t * lm = &im->lookup_main;
1099 clib_error_t * error;
1100 u32 if_address_index;
1101 ip6_address_fib_t ip6_af, * addr_fib = 0;
1103 vec_validate (im->fib_index_by_sw_if_index, sw_if_index);
1104 ip6_addr_fib_init (&ip6_af, address,
1105 vec_elt (im->fib_index_by_sw_if_index, sw_if_index));
1106 vec_add1 (addr_fib, ip6_af);
1109 uword elts_before = pool_elts (lm->if_address_pool);
1111 error = ip_interface_address_add_del
1121 /* Pool did not grow: add duplicate address. */
1122 if (elts_before == pool_elts (lm->if_address_pool))
1126 if (vnet_sw_interface_is_admin_up (vnm, sw_if_index) && insert_routes)
1129 ip6_del_interface_routes (im, ip6_af.fib_index, address,
1133 ip6_add_interface_routes (vnm, sw_if_index,
1134 im, ip6_af.fib_index,
1135 pool_elt_at_index (lm->if_address_pool, if_address_index));
1139 ip6_add_del_interface_address_callback_t * cb;
1140 vec_foreach (cb, im->add_del_interface_address_callbacks)
1141 cb->function (im, cb->function_opaque, sw_if_index,
1142 address, address_length,
1148 vec_free (addr_fib);
1153 ip6_add_del_interface_address (vlib_main_t * vm, u32 sw_if_index,
1154 ip6_address_t * address, u32 address_length,
1157 return ip6_add_del_interface_address_internal
1158 (vm, sw_if_index, address, address_length,
1159 /* redistribute */ 1,
1160 /* insert_routes */ 1,
1165 ip6_sw_interface_admin_up_down (vnet_main_t * vnm,
1169 ip6_main_t * im = &ip6_main;
1170 ip_interface_address_t * ia;
1172 u32 is_admin_up, fib_index;
1174 /* Fill in lookup tables with default table (0). */
1175 vec_validate (im->fib_index_by_sw_if_index, sw_if_index);
1177 vec_validate_init_empty (im->lookup_main.if_address_pool_index_by_sw_if_index, sw_if_index, ~0);
1179 is_admin_up = (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) != 0;
1181 fib_index = vec_elt (im->fib_index_by_sw_if_index, sw_if_index);
1183 foreach_ip_interface_address (&im->lookup_main, ia, sw_if_index,
1184 0 /* honor unnumbered */,
1186 a = ip_interface_address_get_address (&im->lookup_main, ia);
1188 ip6_add_interface_routes (vnm, sw_if_index,
1192 ip6_del_interface_routes (im, fib_index,
1193 a, ia->address_length);
1199 VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION (ip6_sw_interface_admin_up_down);
1202 ip6_sw_interface_add_del (vnet_main_t * vnm,
1206 vlib_main_t * vm = vnm->vlib_main;
1207 ip6_main_t * im = &ip6_main;
1208 ip_lookup_main_t * lm = &im->lookup_main;
1211 for (cast = 0; cast < VNET_N_CAST; cast++)
1213 ip_config_main_t * cm = &lm->rx_config_mains[cast];
1214 vnet_config_main_t * vcm = &cm->config_main;
1216 /* FIXME multicast. */
1217 if (! vcm->node_index_by_feature_index)
1219 char * start_nodes[] = { "ip6-input", };
1220 char * feature_nodes[] = {
1221 [IP6_RX_FEATURE_CHECK_ACCESS] = "ip6-inacl",
1222 [IP6_RX_FEATURE_IPSEC] = "ipsec-input-ip6",
1223 [IP6_RX_FEATURE_L2TPV3] = "l2tp-decap",
1224 [IP6_RX_FEATURE_VPATH] = "vpath-input-ip6",
1225 [IP6_RX_FEATURE_LOOKUP] = "ip6-lookup",
1227 vnet_config_init (vm, vcm,
1228 start_nodes, ARRAY_LEN (start_nodes),
1229 feature_nodes, ARRAY_LEN (feature_nodes));
1232 vec_validate_init_empty (cm->config_index_by_sw_if_index, sw_if_index, ~0);
1233 ci = cm->config_index_by_sw_if_index[sw_if_index];
1236 ci = vnet_config_add_feature (vm, vcm,
1238 IP6_RX_FEATURE_LOOKUP,
1239 /* config data */ 0,
1240 /* # bytes of config data */ 0);
1242 ci = vnet_config_del_feature (vm, vcm,
1244 IP6_RX_FEATURE_LOOKUP,
1245 /* config data */ 0,
1246 /* # bytes of config data */ 0);
1248 cm->config_index_by_sw_if_index[sw_if_index] = ci;
1250 return /* no error */ 0;
1253 VNET_SW_INTERFACE_ADD_DEL_FUNCTION (ip6_sw_interface_add_del);
1256 ip6_lookup (vlib_main_t * vm,
1257 vlib_node_runtime_t * node,
1258 vlib_frame_t * frame)
1260 return ip6_lookup_inline (vm, node, frame, /* is_indirect */ 0);
1263 static u8 * format_ip6_lookup_trace (u8 * s, va_list * args);
1265 VLIB_REGISTER_NODE (ip6_lookup_node) = {
1266 .function = ip6_lookup,
1267 .name = "ip6-lookup",
1268 .vector_size = sizeof (u32),
1270 .format_trace = format_ip6_lookup_trace,
1272 .n_next_nodes = IP_LOOKUP_N_NEXT,
1273 .next_nodes = IP6_LOOKUP_NEXT_NODES,
1276 VLIB_NODE_FUNCTION_MULTIARCH (ip6_lookup_node, ip6_lookup)
1279 ip6_indirect (vlib_main_t * vm,
1280 vlib_node_runtime_t * node,
1281 vlib_frame_t * frame)
1283 return ip6_lookup_inline (vm, node, frame, /* is_indirect */ 1);
1287 VLIB_REGISTER_NODE (ip6_indirect_node) = {
1288 .function = ip6_indirect,
1289 .name = "ip6-indirect",
1290 .vector_size = sizeof (u32),
1292 .format_trace = format_ip6_lookup_trace,
1294 .n_next_nodes = IP_LOOKUP_N_NEXT,
1295 .next_nodes = IP6_LOOKUP_NEXT_NODES,
1298 VLIB_NODE_FUNCTION_MULTIARCH (ip6_indirect_node, ip6_indirect)
1301 /* Adjacency taken. */
1306 /* Packet data, possibly *after* rewrite. */
1307 u8 packet_data[128 - 1*sizeof(u32)];
1308 } ip6_forward_next_trace_t;
1310 static u8 * format_ip6_forward_next_trace (u8 * s, va_list * args)
1312 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
1313 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
1314 ip6_forward_next_trace_t * t = va_arg (*args, ip6_forward_next_trace_t *);
1315 uword indent = format_get_indent (s);
1317 s = format(s, "%U%U",
1318 format_white_space, indent,
1319 format_ip6_header, t->packet_data);
1323 static u8 * format_ip6_lookup_trace (u8 * s, va_list * args)
1325 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
1326 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
1327 ip6_forward_next_trace_t * t = va_arg (*args, ip6_forward_next_trace_t *);
1328 vnet_main_t * vnm = vnet_get_main();
1329 ip6_main_t * im = &ip6_main;
1330 uword indent = format_get_indent (s);
1332 s = format (s, "fib %d adj-idx %d : %U flow hash: 0x%08x",
1333 t->fib_index, t->adj_index, format_ip_adjacency,
1334 vnm, &im->lookup_main, t->adj_index, t->flow_hash);
1335 s = format(s, "\n%U%U",
1336 format_white_space, indent,
1337 format_ip6_header, t->packet_data);
1342 static u8 * format_ip6_rewrite_trace (u8 * s, va_list * args)
1344 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
1345 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
1346 ip6_forward_next_trace_t * t = va_arg (*args, ip6_forward_next_trace_t *);
1347 vnet_main_t * vnm = vnet_get_main();
1348 ip6_main_t * im = &ip6_main;
1349 uword indent = format_get_indent (s);
1351 s = format (s, "tx_sw_if_index %d adj-idx %d : %U flow hash: 0x%08x",
1352 t->fib_index, t->adj_index, format_ip_adjacency,
1353 vnm, &im->lookup_main, t->adj_index, t->flow_hash);
1354 s = format (s, "\n%U%U",
1355 format_white_space, indent,
1356 format_ip_adjacency_packet_data,
1357 vnm, &im->lookup_main, t->adj_index,
1358 t->packet_data, sizeof (t->packet_data));
1362 /* Common trace function for all ip6-forward next nodes. */
1364 ip6_forward_next_trace (vlib_main_t * vm,
1365 vlib_node_runtime_t * node,
1366 vlib_frame_t * frame,
1367 vlib_rx_or_tx_t which_adj_index)
1370 ip6_main_t * im = &ip6_main;
1372 n_left = frame->n_vectors;
1373 from = vlib_frame_vector_args (frame);
1378 vlib_buffer_t * b0, * b1;
1379 ip6_forward_next_trace_t * t0, * t1;
1381 /* Prefetch next iteration. */
1382 vlib_prefetch_buffer_with_index (vm, from[2], LOAD);
1383 vlib_prefetch_buffer_with_index (vm, from[3], LOAD);
1388 b0 = vlib_get_buffer (vm, bi0);
1389 b1 = vlib_get_buffer (vm, bi1);
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 = (vnet_buffer(b0)->sw_if_index[VLIB_TX] != (u32)~0) ?
1397 vnet_buffer(b0)->sw_if_index[VLIB_TX] :
1398 vec_elt (im->fib_index_by_sw_if_index,
1399 vnet_buffer(b0)->sw_if_index[VLIB_RX]);
1401 clib_memcpy (t0->packet_data,
1402 vlib_buffer_get_current (b0),
1403 sizeof (t0->packet_data));
1405 if (b1->flags & VLIB_BUFFER_IS_TRACED)
1407 t1 = vlib_add_trace (vm, node, b1, sizeof (t1[0]));
1408 t1->adj_index = vnet_buffer (b1)->ip.adj_index[which_adj_index];
1409 t1->flow_hash = vnet_buffer (b1)->ip.flow_hash;
1410 t1->fib_index = (vnet_buffer(b1)->sw_if_index[VLIB_TX] != (u32)~0) ?
1411 vnet_buffer(b1)->sw_if_index[VLIB_TX] :
1412 vec_elt (im->fib_index_by_sw_if_index,
1413 vnet_buffer(b1)->sw_if_index[VLIB_RX]);
1415 clib_memcpy (t1->packet_data,
1416 vlib_buffer_get_current (b1),
1417 sizeof (t1->packet_data));
1427 ip6_forward_next_trace_t * t0;
1431 b0 = vlib_get_buffer (vm, bi0);
1433 if (b0->flags & VLIB_BUFFER_IS_TRACED)
1435 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
1436 t0->adj_index = vnet_buffer (b0)->ip.adj_index[which_adj_index];
1437 t0->flow_hash = vnet_buffer (b0)->ip.flow_hash;
1438 t0->fib_index = (vnet_buffer(b0)->sw_if_index[VLIB_TX] != (u32)~0) ?
1439 vnet_buffer(b0)->sw_if_index[VLIB_TX] :
1440 vec_elt (im->fib_index_by_sw_if_index,
1441 vnet_buffer(b0)->sw_if_index[VLIB_RX]);
1443 clib_memcpy (t0->packet_data,
1444 vlib_buffer_get_current (b0),
1445 sizeof (t0->packet_data));
1453 ip6_drop_or_punt (vlib_main_t * vm,
1454 vlib_node_runtime_t * node,
1455 vlib_frame_t * frame,
1456 ip6_error_t error_code)
1458 u32 * buffers = vlib_frame_vector_args (frame);
1459 uword n_packets = frame->n_vectors;
1461 vlib_error_drop_buffers (vm, node,
1466 ip6_input_node.index,
1469 if (node->flags & VLIB_NODE_FLAG_TRACE)
1470 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
1476 ip6_drop (vlib_main_t * vm,
1477 vlib_node_runtime_t * node,
1478 vlib_frame_t * frame)
1479 { return ip6_drop_or_punt (vm, node, frame, IP6_ERROR_ADJACENCY_DROP); }
1482 ip6_punt (vlib_main_t * vm,
1483 vlib_node_runtime_t * node,
1484 vlib_frame_t * frame)
1485 { return ip6_drop_or_punt (vm, node, frame, IP6_ERROR_ADJACENCY_PUNT); }
1488 ip6_miss (vlib_main_t * vm,
1489 vlib_node_runtime_t * node,
1490 vlib_frame_t * frame)
1491 { return ip6_drop_or_punt (vm, node, frame, IP6_ERROR_DST_LOOKUP_MISS); }
1493 VLIB_REGISTER_NODE (ip6_drop_node,static) = {
1494 .function = ip6_drop,
1496 .vector_size = sizeof (u32),
1498 .format_trace = format_ip6_forward_next_trace,
1506 VLIB_NODE_FUNCTION_MULTIARCH (ip6_drop_node, ip6_drop)
1508 VLIB_REGISTER_NODE (ip6_punt_node,static) = {
1509 .function = ip6_punt,
1511 .vector_size = sizeof (u32),
1513 .format_trace = format_ip6_forward_next_trace,
1521 VLIB_NODE_FUNCTION_MULTIARCH (ip6_punt_node, ip6_punt)
1523 VLIB_REGISTER_NODE (ip6_miss_node,static) = {
1524 .function = ip6_miss,
1526 .vector_size = sizeof (u32),
1528 .format_trace = format_ip6_forward_next_trace,
1536 VLIB_NODE_FUNCTION_MULTIARCH (ip6_miss_node, ip6_miss)
1538 VLIB_REGISTER_NODE (ip6_multicast_node,static) = {
1539 .function = ip6_drop,
1540 .name = "ip6-multicast",
1541 .vector_size = sizeof (u32),
1543 .format_trace = format_ip6_forward_next_trace,
1551 /* Compute TCP/UDP/ICMP6 checksum in software. */
1552 u16 ip6_tcp_udp_icmp_compute_checksum (vlib_main_t * vm, vlib_buffer_t * p0, ip6_header_t * ip0, int *bogus_lengthp)
1555 u16 sum16, payload_length_host_byte_order;
1556 u32 i, n_this_buffer, n_bytes_left;
1557 u32 headers_size = sizeof(ip0[0]);
1558 void * data_this_buffer;
1560 ASSERT(bogus_lengthp);
1563 /* Initialize checksum with ip header. */
1564 sum0 = ip0->payload_length + clib_host_to_net_u16 (ip0->protocol);
1565 payload_length_host_byte_order = clib_net_to_host_u16 (ip0->payload_length);
1566 data_this_buffer = (void *) (ip0 + 1);
1568 for (i = 0; i < ARRAY_LEN (ip0->src_address.as_uword); i++)
1570 sum0 = ip_csum_with_carry (sum0,
1571 clib_mem_unaligned (&ip0->src_address.as_uword[i], uword));
1572 sum0 = ip_csum_with_carry (sum0,
1573 clib_mem_unaligned (&ip0->dst_address.as_uword[i], uword));
1576 /* some icmp packets may come with a "router alert" hop-by-hop extension header (e.g., mldv2 packets) */
1577 if (PREDICT_FALSE (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
1580 ip6_hop_by_hop_ext_t *ext_hdr = (ip6_hop_by_hop_ext_t *)data_this_buffer;
1582 /* validate really icmp6 next */
1583 ASSERT(ext_hdr->next_hdr == IP_PROTOCOL_ICMP6);
1585 skip_bytes = 8* (1 + ext_hdr->n_data_u64s);
1586 data_this_buffer = (void *)((u8 *)data_this_buffer + skip_bytes);
1588 payload_length_host_byte_order -= skip_bytes;
1589 headers_size += skip_bytes;
1592 n_bytes_left = n_this_buffer = payload_length_host_byte_order;
1594 if (p0 && n_this_buffer + headers_size > p0->current_length)
1596 struct rte_mbuf *mb = rte_mbuf_from_vlib_buffer(p0);
1597 u8 nb_segs = mb->nb_segs;
1599 n_this_buffer = (p0->current_length > headers_size ?
1600 p0->current_length - headers_size : 0);
1601 while (n_bytes_left)
1603 sum0 = ip_incremental_checksum (sum0, data_this_buffer, n_this_buffer);
1604 n_bytes_left -= n_this_buffer;
1608 if ((nb_segs == 0) || (mb == 0))
1611 data_this_buffer = rte_ctrlmbuf_data(mb);
1612 n_this_buffer = mb->data_len;
1614 if (n_bytes_left || nb_segs)
1620 else sum0 = ip_incremental_checksum (sum0, data_this_buffer, n_this_buffer);
1622 if (p0 && n_this_buffer + headers_size > p0->current_length)
1623 n_this_buffer = p0->current_length > headers_size ? p0->current_length - headers_size : 0;
1626 sum0 = ip_incremental_checksum (sum0, data_this_buffer, n_this_buffer);
1627 n_bytes_left -= n_this_buffer;
1628 if (n_bytes_left == 0)
1631 if (!(p0->flags & VLIB_BUFFER_NEXT_PRESENT))
1636 p0 = vlib_get_buffer (vm, p0->next_buffer);
1637 data_this_buffer = vlib_buffer_get_current (p0);
1638 n_this_buffer = p0->current_length;
1642 sum16 = ~ ip_csum_fold (sum0);
1647 u32 ip6_tcp_udp_icmp_validate_checksum (vlib_main_t * vm, vlib_buffer_t * p0)
1649 ip6_header_t * ip0 = vlib_buffer_get_current (p0);
1650 udp_header_t * udp0;
1654 /* some icmp packets may come with a "router alert" hop-by-hop extension header (e.g., mldv2 packets) */
1655 ASSERT (ip0->protocol == IP_PROTOCOL_TCP
1656 || ip0->protocol == IP_PROTOCOL_ICMP6
1657 || ip0->protocol == IP_PROTOCOL_UDP
1658 || ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS);
1660 udp0 = (void *) (ip0 + 1);
1661 if (ip0->protocol == IP_PROTOCOL_UDP && udp0->checksum == 0)
1663 p0->flags |= (IP_BUFFER_L4_CHECKSUM_COMPUTED
1664 | IP_BUFFER_L4_CHECKSUM_CORRECT);
1668 sum16 = ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip0, &bogus_length);
1670 p0->flags |= (IP_BUFFER_L4_CHECKSUM_COMPUTED
1671 | ((sum16 == 0) << LOG2_IP_BUFFER_L4_CHECKSUM_CORRECT));
1677 ip6_local (vlib_main_t * vm,
1678 vlib_node_runtime_t * node,
1679 vlib_frame_t * frame)
1681 ip6_main_t * im = &ip6_main;
1682 ip_lookup_main_t * lm = &im->lookup_main;
1683 ip_local_next_t next_index;
1684 u32 * from, * to_next, n_left_from, n_left_to_next;
1685 vlib_node_runtime_t * error_node = vlib_node_get_runtime (vm, ip6_input_node.index);
1687 from = vlib_frame_vector_args (frame);
1688 n_left_from = frame->n_vectors;
1689 next_index = node->cached_next_index;
1691 if (node->flags & VLIB_NODE_FLAG_TRACE)
1692 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
1694 while (n_left_from > 0)
1696 vlib_get_next_frame (vm, node, next_index,
1697 to_next, n_left_to_next);
1699 while (n_left_from >= 4 && n_left_to_next >= 2)
1701 vlib_buffer_t * p0, * p1;
1702 ip6_header_t * ip0, * ip1;
1703 udp_header_t * udp0, * udp1;
1704 u32 pi0, ip_len0, udp_len0, flags0, next0;
1705 u32 pi1, ip_len1, udp_len1, flags1, next1;
1706 i32 len_diff0, len_diff1;
1707 u8 error0, type0, good_l4_checksum0;
1708 u8 error1, type1, good_l4_checksum1;
1710 pi0 = to_next[0] = from[0];
1711 pi1 = to_next[1] = from[1];
1715 n_left_to_next -= 2;
1717 p0 = vlib_get_buffer (vm, pi0);
1718 p1 = vlib_get_buffer (vm, pi1);
1720 ip0 = vlib_buffer_get_current (p0);
1721 ip1 = vlib_buffer_get_current (p1);
1723 type0 = lm->builtin_protocol_by_ip_protocol[ip0->protocol];
1724 type1 = lm->builtin_protocol_by_ip_protocol[ip1->protocol];
1726 next0 = lm->local_next_by_ip_protocol[ip0->protocol];
1727 next1 = lm->local_next_by_ip_protocol[ip1->protocol];
1732 good_l4_checksum0 = (flags0 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0;
1733 good_l4_checksum1 = (flags1 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0;
1735 udp0 = ip6_next_header (ip0);
1736 udp1 = ip6_next_header (ip1);
1738 /* Don't verify UDP checksum for packets with explicit zero checksum. */
1739 good_l4_checksum0 |= type0 == IP_BUILTIN_PROTOCOL_UDP && udp0->checksum == 0;
1740 good_l4_checksum1 |= type1 == IP_BUILTIN_PROTOCOL_UDP && udp1->checksum == 0;
1742 good_l4_checksum0 |= type0 == IP_BUILTIN_PROTOCOL_UNKNOWN;
1743 good_l4_checksum1 |= type1 == IP_BUILTIN_PROTOCOL_UNKNOWN;
1745 /* Verify UDP length. */
1746 ip_len0 = clib_net_to_host_u16 (ip0->payload_length);
1747 ip_len1 = clib_net_to_host_u16 (ip1->payload_length);
1748 udp_len0 = clib_net_to_host_u16 (udp0->length);
1749 udp_len1 = clib_net_to_host_u16 (udp1->length);
1751 len_diff0 = ip_len0 - udp_len0;
1752 len_diff1 = ip_len1 - udp_len1;
1754 len_diff0 = type0 == IP_BUILTIN_PROTOCOL_UDP ? len_diff0 : 0;
1755 len_diff1 = type1 == IP_BUILTIN_PROTOCOL_UDP ? len_diff1 : 0;
1757 if (PREDICT_FALSE (type0 != IP_BUILTIN_PROTOCOL_UNKNOWN
1758 && ! good_l4_checksum0
1759 && ! (flags0 & IP_BUFFER_L4_CHECKSUM_COMPUTED)))
1761 flags0 = ip6_tcp_udp_icmp_validate_checksum (vm, p0);
1763 (flags0 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0;
1765 if (PREDICT_FALSE (type1 != IP_BUILTIN_PROTOCOL_UNKNOWN
1766 && ! good_l4_checksum1
1767 && ! (flags1 & IP_BUFFER_L4_CHECKSUM_COMPUTED)))
1769 flags1 = ip6_tcp_udp_icmp_validate_checksum (vm, p1);
1771 (flags1 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0;
1774 error0 = error1 = IP6_ERROR_UNKNOWN_PROTOCOL;
1776 error0 = len_diff0 < 0 ? IP6_ERROR_UDP_LENGTH : error0;
1777 error1 = len_diff1 < 0 ? IP6_ERROR_UDP_LENGTH : error1;
1779 ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_UDP == IP6_ERROR_UDP_CHECKSUM);
1780 ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_ICMP == IP6_ERROR_ICMP_CHECKSUM);
1781 error0 = (! good_l4_checksum0
1782 ? IP6_ERROR_UDP_CHECKSUM + type0
1784 error1 = (! good_l4_checksum1
1785 ? IP6_ERROR_UDP_CHECKSUM + type1
1788 /* Drop packets from unroutable hosts. */
1789 /* If this is a neighbor solicitation (ICMP), skip source RPF check */
1790 if (error0 == IP6_ERROR_UNKNOWN_PROTOCOL && type0 != IP_BUILTIN_PROTOCOL_ICMP)
1792 u32 src_adj_index0 = ip6_src_lookup_for_packet (im, p0, ip0);
1793 error0 = (lm->miss_adj_index == src_adj_index0
1794 ? IP6_ERROR_SRC_LOOKUP_MISS
1797 if (error1 == IP6_ERROR_UNKNOWN_PROTOCOL && type1 != IP_BUILTIN_PROTOCOL_ICMP)
1799 u32 src_adj_index1 = ip6_src_lookup_for_packet (im, p1, ip1);
1800 error1 = (lm->miss_adj_index == src_adj_index1
1801 ? IP6_ERROR_SRC_LOOKUP_MISS
1805 next0 = error0 != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next0;
1806 next1 = error1 != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next1;
1808 p0->error = error_node->errors[error0];
1809 p1->error = error_node->errors[error1];
1811 vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
1812 to_next, n_left_to_next,
1813 pi0, pi1, next0, next1);
1816 while (n_left_from > 0 && n_left_to_next > 0)
1820 udp_header_t * udp0;
1821 u32 pi0, ip_len0, udp_len0, flags0, next0;
1823 u8 error0, type0, good_l4_checksum0;
1825 pi0 = to_next[0] = from[0];
1829 n_left_to_next -= 1;
1831 p0 = vlib_get_buffer (vm, pi0);
1833 ip0 = vlib_buffer_get_current (p0);
1835 type0 = lm->builtin_protocol_by_ip_protocol[ip0->protocol];
1836 next0 = lm->local_next_by_ip_protocol[ip0->protocol];
1840 good_l4_checksum0 = (flags0 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0;
1842 udp0 = ip6_next_header (ip0);
1844 /* Don't verify UDP checksum for packets with explicit zero checksum. */
1845 good_l4_checksum0 |= type0 == IP_BUILTIN_PROTOCOL_UDP && udp0->checksum == 0;
1847 good_l4_checksum0 |= type0 == IP_BUILTIN_PROTOCOL_UNKNOWN;
1849 /* Verify UDP length. */
1850 ip_len0 = clib_net_to_host_u16 (ip0->payload_length);
1851 udp_len0 = clib_net_to_host_u16 (udp0->length);
1853 len_diff0 = ip_len0 - udp_len0;
1855 len_diff0 = type0 == IP_BUILTIN_PROTOCOL_UDP ? len_diff0 : 0;
1857 if (PREDICT_FALSE (type0 != IP_BUILTIN_PROTOCOL_UNKNOWN
1858 && ! good_l4_checksum0
1859 && ! (flags0 & IP_BUFFER_L4_CHECKSUM_COMPUTED)))
1861 flags0 = ip6_tcp_udp_icmp_validate_checksum (vm, p0);
1863 (flags0 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0;
1866 error0 = IP6_ERROR_UNKNOWN_PROTOCOL;
1868 error0 = len_diff0 < 0 ? IP6_ERROR_UDP_LENGTH : error0;
1870 ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_UDP == IP6_ERROR_UDP_CHECKSUM);
1871 ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_ICMP == IP6_ERROR_ICMP_CHECKSUM);
1872 error0 = (! good_l4_checksum0
1873 ? IP6_ERROR_UDP_CHECKSUM + type0
1876 /* If this is a neighbor solicitation (ICMP), skip source RPF check */
1877 if (error0 == IP6_ERROR_UNKNOWN_PROTOCOL && type0 != IP_BUILTIN_PROTOCOL_ICMP)
1879 u32 src_adj_index0 = ip6_src_lookup_for_packet (im, p0, ip0);
1880 error0 = (lm->miss_adj_index == src_adj_index0
1881 ? IP6_ERROR_SRC_LOOKUP_MISS
1885 next0 = error0 != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next0;
1887 p0->error = error_node->errors[error0];
1889 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1890 to_next, n_left_to_next,
1894 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1897 return frame->n_vectors;
1900 VLIB_REGISTER_NODE (ip6_local_node,static) = {
1901 .function = ip6_local,
1902 .name = "ip6-local",
1903 .vector_size = sizeof (u32),
1905 .format_trace = format_ip6_forward_next_trace,
1907 .n_next_nodes = IP_LOCAL_N_NEXT,
1909 [IP_LOCAL_NEXT_DROP] = "error-drop",
1910 [IP_LOCAL_NEXT_PUNT] = "error-punt",
1911 [IP_LOCAL_NEXT_UDP_LOOKUP] = "ip6-udp-lookup",
1912 [IP_LOCAL_NEXT_ICMP] = "ip6-icmp-input",
1916 VLIB_NODE_FUNCTION_MULTIARCH (ip6_local_node, ip6_local)
1918 void ip6_register_protocol (u32 protocol, u32 node_index)
1920 vlib_main_t * vm = vlib_get_main();
1921 ip6_main_t * im = &ip6_main;
1922 ip_lookup_main_t * lm = &im->lookup_main;
1924 ASSERT (protocol < ARRAY_LEN (lm->local_next_by_ip_protocol));
1925 lm->local_next_by_ip_protocol[protocol] = vlib_node_add_next (vm, ip6_local_node.index, node_index);
1929 IP6_DISCOVER_NEIGHBOR_NEXT_DROP,
1930 IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX,
1931 IP6_DISCOVER_NEIGHBOR_N_NEXT,
1932 } ip6_discover_neighbor_next_t;
1935 IP6_DISCOVER_NEIGHBOR_ERROR_DROP,
1936 IP6_DISCOVER_NEIGHBOR_ERROR_REQUEST_SENT,
1937 } ip6_discover_neighbor_error_t;
1940 ip6_discover_neighbor (vlib_main_t * vm,
1941 vlib_node_runtime_t * node,
1942 vlib_frame_t * frame)
1944 vnet_main_t * vnm = vnet_get_main();
1945 ip6_main_t * im = &ip6_main;
1946 ip_lookup_main_t * lm = &im->lookup_main;
1947 u32 * from, * to_next_drop;
1948 uword n_left_from, n_left_to_next_drop;
1949 static f64 time_last_seed_change = -1e100;
1950 static u32 hash_seeds[3];
1951 static uword hash_bitmap[256 / BITS (uword)];
1955 if (node->flags & VLIB_NODE_FLAG_TRACE)
1956 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
1958 time_now = vlib_time_now (vm);
1959 if (time_now - time_last_seed_change > 1e-3)
1962 u32 * r = clib_random_buffer_get_data (&vm->random_buffer,
1963 sizeof (hash_seeds));
1964 for (i = 0; i < ARRAY_LEN (hash_seeds); i++)
1965 hash_seeds[i] = r[i];
1967 /* Mark all hash keys as been not-seen before. */
1968 for (i = 0; i < ARRAY_LEN (hash_bitmap); i++)
1971 time_last_seed_change = time_now;
1974 from = vlib_frame_vector_args (frame);
1975 n_left_from = frame->n_vectors;
1977 while (n_left_from > 0)
1979 vlib_get_next_frame (vm, node, IP6_DISCOVER_NEIGHBOR_NEXT_DROP,
1980 to_next_drop, n_left_to_next_drop);
1982 while (n_left_from > 0 && n_left_to_next_drop > 0)
1986 u32 pi0, adj_index0, a0, b0, c0, m0, sw_if_index0, drop0;
1988 ip_adjacency_t * adj0;
1989 vnet_hw_interface_t * hw_if0;
1994 p0 = vlib_get_buffer (vm, pi0);
1996 adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
1998 ip0 = vlib_buffer_get_current (p0);
2000 adj0 = ip_get_adjacency (lm, adj_index0);
2002 if (adj0->arp.next_hop.ip6.as_u64[0] ||
2003 adj0->arp.next_hop.ip6.as_u64[1]) {
2004 ip0->dst_address.as_u64[0] = adj0->arp.next_hop.ip6.as_u64[0];
2005 ip0->dst_address.as_u64[1] = adj0->arp.next_hop.ip6.as_u64[1];
2012 sw_if_index0 = adj0->rewrite_header.sw_if_index;
2013 vnet_buffer (p0)->sw_if_index[VLIB_TX] = sw_if_index0;
2016 b0 ^= ip0->dst_address.as_u32[0];
2017 c0 ^= ip0->dst_address.as_u32[1];
2019 hash_v3_mix32 (a0, b0, c0);
2021 b0 ^= ip0->dst_address.as_u32[2];
2022 c0 ^= ip0->dst_address.as_u32[3];
2024 hash_v3_finalize32 (a0, b0, c0);
2026 c0 &= BITS (hash_bitmap) - 1;
2027 c0 = c0 / BITS (uword);
2028 m0 = (uword) 1 << (c0 % BITS (uword));
2030 bm0 = hash_bitmap[c0];
2031 drop0 = (bm0 & m0) != 0;
2033 /* Mark it as seen. */
2034 hash_bitmap[c0] = bm0 | m0;
2038 to_next_drop[0] = pi0;
2040 n_left_to_next_drop -= 1;
2042 hw_if0 = vnet_get_sup_hw_interface (vnm, sw_if_index0);
2044 /* If the interface is link-down, drop the pkt */
2045 if (!(hw_if0->flags & VNET_HW_INTERFACE_FLAG_LINK_UP))
2049 node->errors[drop0 ? IP6_DISCOVER_NEIGHBOR_ERROR_DROP
2050 : IP6_DISCOVER_NEIGHBOR_ERROR_REQUEST_SENT];
2056 icmp6_neighbor_solicitation_header_t * h0;
2059 h0 = vlib_packet_template_get_packet
2060 (vm, &im->discover_neighbor_packet_template, &bi0);
2063 * Build ethernet header.
2064 * Choose source address based on destination lookup
2067 ip6_src_address_for_packet (im, p0, &h0->ip.src_address,
2071 * Destination address is a solicited node multicast address.
2072 * We need to fill in
2073 * the low 24 bits with low 24 bits of target's address.
2075 h0->ip.dst_address.as_u8[13] = ip0->dst_address.as_u8[13];
2076 h0->ip.dst_address.as_u8[14] = ip0->dst_address.as_u8[14];
2077 h0->ip.dst_address.as_u8[15] = ip0->dst_address.as_u8[15];
2079 h0->neighbor.target_address = ip0->dst_address;
2081 clib_memcpy (h0->link_layer_option.ethernet_address,
2082 hw_if0->hw_address, vec_len (hw_if0->hw_address));
2084 /* $$$$ appears we need this; why is the checksum non-zero? */
2085 h0->neighbor.icmp.checksum = 0;
2086 h0->neighbor.icmp.checksum =
2087 ip6_tcp_udp_icmp_compute_checksum (vm, 0, &h0->ip,
2090 ASSERT (bogus_length == 0);
2092 vlib_buffer_copy_trace_flag (vm, p0, bi0);
2093 b0 = vlib_get_buffer (vm, bi0);
2094 vnet_buffer (b0)->sw_if_index[VLIB_TX]
2095 = vnet_buffer (p0)->sw_if_index[VLIB_TX];
2097 /* Add rewrite/encap string. */
2098 vnet_rewrite_one_header (adj0[0], h0,
2099 sizeof (ethernet_header_t));
2100 vlib_buffer_advance (b0, -adj0->rewrite_header.data_bytes);
2102 next0 = IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX;
2104 vlib_set_next_frame_buffer (vm, node, next0, bi0);
2108 vlib_put_next_frame (vm, node, IP6_DISCOVER_NEIGHBOR_NEXT_DROP,
2109 n_left_to_next_drop);
2112 return frame->n_vectors;
2115 static char * ip6_discover_neighbor_error_strings[] = {
2116 [IP6_DISCOVER_NEIGHBOR_ERROR_DROP] = "address overflow drops",
2117 [IP6_DISCOVER_NEIGHBOR_ERROR_REQUEST_SENT]
2118 = "neighbor solicitations sent",
2121 VLIB_REGISTER_NODE (ip6_discover_neighbor_node) = {
2122 .function = ip6_discover_neighbor,
2123 .name = "ip6-discover-neighbor",
2124 .vector_size = sizeof (u32),
2126 .format_trace = format_ip6_forward_next_trace,
2128 .n_errors = ARRAY_LEN (ip6_discover_neighbor_error_strings),
2129 .error_strings = ip6_discover_neighbor_error_strings,
2131 .n_next_nodes = IP6_DISCOVER_NEIGHBOR_N_NEXT,
2133 [IP6_DISCOVER_NEIGHBOR_NEXT_DROP] = "error-drop",
2134 [IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX] = "interface-output",
2139 ip6_probe_neighbor (vlib_main_t * vm, ip6_address_t * dst, u32 sw_if_index)
2141 vnet_main_t * vnm = vnet_get_main();
2142 ip6_main_t * im = &ip6_main;
2143 icmp6_neighbor_solicitation_header_t * h;
2144 ip6_address_t * src;
2145 ip_interface_address_t * ia;
2146 ip_adjacency_t * adj;
2147 vnet_hw_interface_t * hi;
2148 vnet_sw_interface_t * si;
2153 si = vnet_get_sw_interface (vnm, sw_if_index);
2155 if (!(si->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP))
2157 return clib_error_return (0, "%U: interface %U down",
2158 format_ip6_address, dst,
2159 format_vnet_sw_if_index_name, vnm,
2163 src = ip6_interface_address_matching_destination (im, dst, sw_if_index, &ia);
2166 vnm->api_errno = VNET_API_ERROR_NO_MATCHING_INTERFACE;
2167 return clib_error_return
2168 (0, "no matching interface address for destination %U (interface %U)",
2169 format_ip6_address, dst,
2170 format_vnet_sw_if_index_name, vnm, sw_if_index);
2173 h = vlib_packet_template_get_packet (vm, &im->discover_neighbor_packet_template, &bi);
2175 hi = vnet_get_sup_hw_interface (vnm, sw_if_index);
2177 /* Destination address is a solicited node multicast address. We need to fill in
2178 the low 24 bits with low 24 bits of target's address. */
2179 h->ip.dst_address.as_u8[13] = dst->as_u8[13];
2180 h->ip.dst_address.as_u8[14] = dst->as_u8[14];
2181 h->ip.dst_address.as_u8[15] = dst->as_u8[15];
2183 h->ip.src_address = src[0];
2184 h->neighbor.target_address = dst[0];
2186 clib_memcpy (h->link_layer_option.ethernet_address, hi->hw_address, vec_len (hi->hw_address));
2188 h->neighbor.icmp.checksum =
2189 ip6_tcp_udp_icmp_compute_checksum (vm, 0, &h->ip, &bogus_length);
2190 ASSERT(bogus_length == 0);
2192 b = vlib_get_buffer (vm, bi);
2193 vnet_buffer (b)->sw_if_index[VLIB_RX] = vnet_buffer (b)->sw_if_index[VLIB_TX] = sw_if_index;
2195 /* Add encapsulation string for software interface (e.g. ethernet header). */
2196 adj = ip_get_adjacency (&im->lookup_main, ia->neighbor_probe_adj_index);
2197 vnet_rewrite_one_header (adj[0], h, sizeof (ethernet_header_t));
2198 vlib_buffer_advance (b, -adj->rewrite_header.data_bytes);
2201 vlib_frame_t * f = vlib_get_frame_to_node (vm, hi->output_node_index);
2202 u32 * to_next = vlib_frame_vector_args (f);
2205 vlib_put_frame_to_node (vm, hi->output_node_index, f);
2208 return /* no error */ 0;
2212 IP6_REWRITE_NEXT_DROP,
2213 } ip6_rewrite_next_t;
2216 ip6_rewrite_inline (vlib_main_t * vm,
2217 vlib_node_runtime_t * node,
2218 vlib_frame_t * frame,
2219 int rewrite_for_locally_received_packets)
2221 ip_lookup_main_t * lm = &ip6_main.lookup_main;
2222 u32 * from = vlib_frame_vector_args (frame);
2223 u32 n_left_from, n_left_to_next, * to_next, next_index;
2224 vlib_node_runtime_t * error_node = vlib_node_get_runtime (vm, ip6_input_node.index);
2225 vlib_rx_or_tx_t adj_rx_tx = rewrite_for_locally_received_packets ? VLIB_RX : VLIB_TX;
2227 n_left_from = frame->n_vectors;
2228 next_index = node->cached_next_index;
2229 u32 cpu_index = os_get_cpu_number();
2231 while (n_left_from > 0)
2233 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
2235 while (n_left_from >= 4 && n_left_to_next >= 2)
2237 ip_adjacency_t * adj0, * adj1;
2238 vlib_buffer_t * p0, * p1;
2239 ip6_header_t * ip0, * ip1;
2240 u32 pi0, rw_len0, next0, error0, adj_index0;
2241 u32 pi1, rw_len1, next1, error1, adj_index1;
2243 /* Prefetch next iteration. */
2245 vlib_buffer_t * p2, * p3;
2247 p2 = vlib_get_buffer (vm, from[2]);
2248 p3 = vlib_get_buffer (vm, from[3]);
2250 vlib_prefetch_buffer_header (p2, LOAD);
2251 vlib_prefetch_buffer_header (p3, LOAD);
2253 CLIB_PREFETCH (p2->pre_data, 32, STORE);
2254 CLIB_PREFETCH (p3->pre_data, 32, STORE);
2256 CLIB_PREFETCH (p2->data, sizeof (ip0[0]), STORE);
2257 CLIB_PREFETCH (p3->data, sizeof (ip0[0]), STORE);
2260 pi0 = to_next[0] = from[0];
2261 pi1 = to_next[1] = from[1];
2266 n_left_to_next -= 2;
2268 p0 = vlib_get_buffer (vm, pi0);
2269 p1 = vlib_get_buffer (vm, pi1);
2271 adj_index0 = vnet_buffer (p0)->ip.adj_index[adj_rx_tx];
2272 adj_index1 = vnet_buffer (p1)->ip.adj_index[adj_rx_tx];
2274 /* We should never rewrite a pkt using the MISS adjacency */
2275 ASSERT(adj_index0 && adj_index1);
2277 ip0 = vlib_buffer_get_current (p0);
2278 ip1 = vlib_buffer_get_current (p1);
2280 error0 = error1 = IP6_ERROR_NONE;
2282 if (! rewrite_for_locally_received_packets)
2284 i32 hop_limit0 = ip0->hop_limit, hop_limit1 = ip1->hop_limit;
2286 /* Input node should have reject packets with hop limit 0. */
2287 ASSERT (ip0->hop_limit > 0);
2288 ASSERT (ip1->hop_limit > 0);
2293 ip0->hop_limit = hop_limit0;
2294 ip1->hop_limit = hop_limit1;
2296 error0 = hop_limit0 <= 0 ? IP6_ERROR_TIME_EXPIRED : error0;
2297 error1 = hop_limit1 <= 0 ? IP6_ERROR_TIME_EXPIRED : error1;
2300 adj0 = ip_get_adjacency (lm, adj_index0);
2301 adj1 = ip_get_adjacency (lm, adj_index1);
2303 if (rewrite_for_locally_received_packets)
2306 * If someone sends e.g. an icmp6 w/ src = dst = interface addr,
2307 * we end up here with a local adjacency in hand
2309 if (PREDICT_FALSE(adj0->lookup_next_index
2310 == IP_LOOKUP_NEXT_LOCAL))
2311 error0 = IP6_ERROR_SPOOFED_LOCAL_PACKETS;
2312 if (PREDICT_FALSE(adj1->lookup_next_index
2313 == IP_LOOKUP_NEXT_LOCAL))
2314 error1 = IP6_ERROR_SPOOFED_LOCAL_PACKETS;
2317 rw_len0 = adj0[0].rewrite_header.data_bytes;
2318 rw_len1 = adj1[0].rewrite_header.data_bytes;
2320 vlib_increment_combined_counter (&lm->adjacency_counters,
2323 /* packet increment */ 0,
2324 /* byte increment */ rw_len0);
2325 vlib_increment_combined_counter (&lm->adjacency_counters,
2328 /* packet increment */ 0,
2329 /* byte increment */ rw_len1);
2331 /* Check MTU of outgoing interface. */
2332 error0 = (vlib_buffer_length_in_chain (vm, p0) > adj0[0].rewrite_header.max_l3_packet_bytes
2333 ? IP6_ERROR_MTU_EXCEEDED
2335 error1 = (vlib_buffer_length_in_chain (vm, p1) > adj1[0].rewrite_header.max_l3_packet_bytes
2336 ? IP6_ERROR_MTU_EXCEEDED
2339 p0->current_data -= rw_len0;
2340 p1->current_data -= rw_len1;
2342 p0->current_length += rw_len0;
2343 p1->current_length += rw_len1;
2345 vnet_buffer (p0)->sw_if_index[VLIB_TX] = adj0[0].rewrite_header.sw_if_index;
2346 vnet_buffer (p1)->sw_if_index[VLIB_TX] = adj1[0].rewrite_header.sw_if_index;
2348 next0 = (error0 == IP6_ERROR_NONE) ?
2349 adj0[0].rewrite_header.next_index : IP6_REWRITE_NEXT_DROP;
2350 next1 = (error1 == IP6_ERROR_NONE) ?
2351 adj1[0].rewrite_header.next_index : IP6_REWRITE_NEXT_DROP;
2353 /* Guess we are only writing on simple Ethernet header. */
2354 vnet_rewrite_two_headers (adj0[0], adj1[0],
2356 sizeof (ethernet_header_t));
2358 vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
2359 to_next, n_left_to_next,
2360 pi0, pi1, next0, next1);
2363 while (n_left_from > 0 && n_left_to_next > 0)
2365 ip_adjacency_t * adj0;
2369 u32 adj_index0, next0, error0;
2371 pi0 = to_next[0] = from[0];
2373 p0 = vlib_get_buffer (vm, pi0);
2375 adj_index0 = vnet_buffer (p0)->ip.adj_index[adj_rx_tx];
2377 /* We should never rewrite a pkt using the MISS adjacency */
2380 adj0 = ip_get_adjacency (lm, adj_index0);
2382 ip0 = vlib_buffer_get_current (p0);
2384 error0 = IP6_ERROR_NONE;
2386 /* Check hop limit */
2387 if (! rewrite_for_locally_received_packets)
2389 i32 hop_limit0 = ip0->hop_limit;
2391 ASSERT (ip0->hop_limit > 0);
2395 ip0->hop_limit = hop_limit0;
2397 error0 = hop_limit0 <= 0 ? IP6_ERROR_TIME_EXPIRED : error0;
2400 if (rewrite_for_locally_received_packets)
2402 if (PREDICT_FALSE(adj0->lookup_next_index
2403 == IP_LOOKUP_NEXT_LOCAL))
2404 error0 = IP6_ERROR_SPOOFED_LOCAL_PACKETS;
2407 /* Guess we are only writing on simple Ethernet header. */
2408 vnet_rewrite_one_header (adj0[0], ip0, sizeof (ethernet_header_t));
2410 /* Update packet buffer attributes/set output interface. */
2411 rw_len0 = adj0[0].rewrite_header.data_bytes;
2413 vlib_increment_combined_counter (&lm->adjacency_counters,
2416 /* packet increment */ 0,
2417 /* byte increment */ rw_len0);
2419 /* Check MTU of outgoing interface. */
2420 error0 = (vlib_buffer_length_in_chain (vm, p0) > adj0[0].rewrite_header.max_l3_packet_bytes
2421 ? IP6_ERROR_MTU_EXCEEDED
2424 p0->current_data -= rw_len0;
2425 p0->current_length += rw_len0;
2426 vnet_buffer (p0)->sw_if_index[VLIB_TX] = adj0[0].rewrite_header.sw_if_index;
2428 next0 = (error0 == IP6_ERROR_NONE) ?
2429 adj0[0].rewrite_header.next_index : IP6_REWRITE_NEXT_DROP;
2431 p0->error = error_node->errors[error0];
2436 n_left_to_next -= 1;
2438 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
2439 to_next, n_left_to_next,
2443 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2446 /* Need to do trace after rewrites to pick up new packet data. */
2447 if (node->flags & VLIB_NODE_FLAG_TRACE)
2448 ip6_forward_next_trace (vm, node, frame, adj_rx_tx);
2450 return frame->n_vectors;
2454 ip6_rewrite_transit (vlib_main_t * vm,
2455 vlib_node_runtime_t * node,
2456 vlib_frame_t * frame)
2458 return ip6_rewrite_inline (vm, node, frame,
2459 /* rewrite_for_locally_received_packets */ 0);
2463 ip6_rewrite_local (vlib_main_t * vm,
2464 vlib_node_runtime_t * node,
2465 vlib_frame_t * frame)
2467 return ip6_rewrite_inline (vm, node, frame,
2468 /* rewrite_for_locally_received_packets */ 1);
2471 VLIB_REGISTER_NODE (ip6_rewrite_node) = {
2472 .function = ip6_rewrite_transit,
2473 .name = "ip6-rewrite",
2474 .vector_size = sizeof (u32),
2476 .format_trace = format_ip6_rewrite_trace,
2480 [IP6_REWRITE_NEXT_DROP] = "error-drop",
2484 VLIB_NODE_FUNCTION_MULTIARCH (ip6_rewrite_node, ip6_rewrite_transit)
2486 VLIB_REGISTER_NODE (ip6_rewrite_local_node) = {
2487 .function = ip6_rewrite_local,
2488 .name = "ip6-rewrite-local",
2489 .vector_size = sizeof (u32),
2491 .sibling_of = "ip6-rewrite",
2493 .format_trace = format_ip6_rewrite_trace,
2497 [IP6_REWRITE_NEXT_DROP] = "error-drop",
2501 VLIB_NODE_FUNCTION_MULTIARCH (ip6_rewrite_local_node, ip6_rewrite_local)
2504 * Hop-by-Hop handling
2507 ip6_hop_by_hop_main_t ip6_hop_by_hop_main;
2509 #define foreach_ip6_hop_by_hop_error \
2510 _(PROCESSED, "pkts with ip6 hop-by-hop options") \
2511 _(FORMAT, "incorrectly formatted hop-by-hop options") \
2512 _(UNKNOWN_OPTION, "unknown ip6 hop-by-hop options")
2515 #define _(sym,str) IP6_HOP_BY_HOP_ERROR_##sym,
2516 foreach_ip6_hop_by_hop_error
2518 IP6_HOP_BY_HOP_N_ERROR,
2519 } ip6_hop_by_hop_error_t;
2522 * Primary h-b-h handler trace support
2523 * We work pretty hard on the problem for obvious reasons
2528 u8 option_data[256];
2529 } ip6_hop_by_hop_trace_t;
2531 vlib_node_registration_t ip6_hop_by_hop_node;
2533 static char * ip6_hop_by_hop_error_strings[] = {
2534 #define _(sym,string) string,
2535 foreach_ip6_hop_by_hop_error
2540 format_ip6_hop_by_hop_trace (u8 * s, va_list * args)
2542 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
2543 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
2544 ip6_hop_by_hop_trace_t * t = va_arg (*args, ip6_hop_by_hop_trace_t *);
2545 ip6_hop_by_hop_header_t *hbh0;
2546 ip6_hop_by_hop_option_t *opt0, *limit0;
2547 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2551 hbh0 = (ip6_hop_by_hop_header_t *)t->option_data;
2553 s = format (s, "IP6_HOP_BY_HOP: next index %d len %d traced %d",
2554 t->next_index, (hbh0->length+1)<<3, t->trace_len);
2556 opt0 = (ip6_hop_by_hop_option_t *) (hbh0+1);
2557 limit0 = (ip6_hop_by_hop_option_t *) ((u8 *)hbh0) + t->trace_len;
2559 while (opt0 < limit0) {
2562 case 0: /* Pad, just stop */
2563 opt0 = (ip6_hop_by_hop_option_t *) ((u8 *)opt0) + 1;
2567 if (hm->trace[type0]) {
2568 s = (*hm->trace[type0])(s, opt0);
2570 s = format (s, "\n unrecognized option %d length %d", type0, opt0->length);
2572 opt0 = (ip6_hop_by_hop_option_t *) (((u8 *)opt0) + opt0->length + sizeof (ip6_hop_by_hop_option_t));
2580 * Process the Hop-by-Hop Options header
2583 ip6_hop_by_hop (vlib_main_t * vm,
2584 vlib_node_runtime_t * node,
2585 vlib_frame_t * frame)
2587 vlib_node_runtime_t *error_node = vlib_node_get_runtime(vm, ip6_hop_by_hop_node.index);
2588 ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
2589 u32 n_left_from, *from, *to_next;
2590 ip_lookup_next_t next_index;
2591 ip6_main_t * im = &ip6_main;
2592 ip_lookup_main_t *lm = &im->lookup_main;
2594 from = vlib_frame_vector_args (frame);
2595 n_left_from = frame->n_vectors;
2596 next_index = node->cached_next_index;
2598 while (n_left_from > 0) {
2601 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
2603 while (n_left_from > 0 && n_left_to_next > 0) {
2608 ip6_hop_by_hop_header_t *hbh0;
2609 ip6_hop_by_hop_option_t *opt0, *limit0;
2613 /* Speculatively enqueue b0 to the current next frame */
2619 n_left_to_next -= 1;
2621 b0 = vlib_get_buffer (vm, bi0);
2622 u32 adj_index0 = vnet_buffer(b0)->ip.adj_index[VLIB_TX];
2623 ip_adjacency_t *adj0 = ip_get_adjacency(lm, adj_index0);
2624 /* Default use the next_index from the adjacency. A HBH option rarely redirects to a different node */
2625 next0 = adj0->lookup_next_index;
2627 ip0 = vlib_buffer_get_current (b0);
2628 hbh0 = (ip6_hop_by_hop_header_t *)(ip0+1);
2629 opt0 = (ip6_hop_by_hop_option_t *)(hbh0+1);
2630 limit0 = (ip6_hop_by_hop_option_t *)((u8 *)hbh0 + ((hbh0->length + 1) << 3));
2633 * Basic validity checks
2635 if ((hbh0->length + 1) << 3 > clib_net_to_host_u16(ip0->payload_length)) {
2636 error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2637 next0 = IP_LOOKUP_NEXT_DROP;
2641 /* Scan the set of h-b-h options, process ones that we understand */
2642 while (opt0 < limit0) {
2646 opt0 = (ip6_hop_by_hop_option_t *) ((u8 *)opt0) + 1;
2651 if (hm->options[type0]) {
2652 if ((*hm->options[type0])(b0, ip0, opt0) < 0) {
2653 error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
2657 /* Unrecognized mandatory option, check the two high order bits */
2658 switch (opt0->type & HBH_OPTION_TYPE_HIGH_ORDER_BITS) {
2659 case HBH_OPTION_TYPE_SKIP_UNKNOWN:
2661 case HBH_OPTION_TYPE_DISCARD_UNKNOWN:
2662 next0 = IP_LOOKUP_NEXT_DROP;
2664 case HBH_OPTION_TYPE_DISCARD_UNKNOWN_ICMP:
2665 next0 = IP_LOOKUP_NEXT_ICMP_ERROR;
2666 icmp6_error_set_vnet_buffer(b0, ICMP6_parameter_problem,
2667 ICMP6_parameter_problem_unrecognized_option, (u8 *)opt0 - (u8 *)ip0);
2669 case HBH_OPTION_TYPE_DISCARD_UNKNOWN_ICMP_NOT_MCAST:
2670 if (!ip6_address_is_multicast(&ip0->dst_address)) {
2671 next0 = IP_LOOKUP_NEXT_ICMP_ERROR;
2672 icmp6_error_set_vnet_buffer(b0, ICMP6_parameter_problem,
2673 ICMP6_parameter_problem_unrecognized_option, (u8 *)opt0 - (u8 *)ip0);
2675 next0 = IP_LOOKUP_NEXT_DROP;
2679 error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
2683 opt0 = (ip6_hop_by_hop_option_t *) (((u8 *)opt0) + opt0->length + sizeof (ip6_hop_by_hop_option_t));
2687 /* Has the classifier flagged this buffer for special treatment? */
2688 if ((error0 == 0) && (vnet_buffer(b0)->l2_classify.opaque_index == OI_DECAP))
2689 next0 = IP_LOOKUP_NEXT_POP_HOP_BY_HOP;
2691 if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED)) {
2692 ip6_hop_by_hop_trace_t *t = vlib_add_trace(vm, node, b0, sizeof (*t));
2693 u32 trace_len = (hbh0->length + 1) << 3;
2694 t->next_index = next0;
2695 /* Capture the h-b-h option verbatim */
2696 trace_len = trace_len < ARRAY_LEN(t->option_data) ? trace_len : ARRAY_LEN(t->option_data);
2697 t->trace_len = trace_len;
2698 clib_memcpy(t->option_data, hbh0, trace_len);
2701 b0->error = error_node->errors[error0];
2703 /* verify speculative enqueue, maybe switch current next frame */
2704 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next, n_left_to_next, bi0, next0);
2706 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2708 return frame->n_vectors;
2711 VLIB_REGISTER_NODE (ip6_hop_by_hop_node) = {
2712 .function = ip6_hop_by_hop,
2713 .name = "ip6-hop-by-hop",
2714 .vector_size = sizeof (u32),
2715 .format_trace = format_ip6_hop_by_hop_trace,
2716 .type = VLIB_NODE_TYPE_INTERNAL,
2717 .n_errors = ARRAY_LEN(ip6_hop_by_hop_error_strings),
2718 .error_strings = ip6_hop_by_hop_error_strings,
2719 .n_next_nodes = IP_LOOKUP_N_NEXT,
2720 .next_nodes = IP6_LOOKUP_NEXT_NODES,
2723 VLIB_NODE_FUNCTION_MULTIARCH (ip6_hop_by_hop_node, ip6_hop_by_hop)
2725 static clib_error_t *
2726 ip6_hop_by_hop_init (vlib_main_t * vm)
2728 ip6_hop_by_hop_main_t * hm = &ip6_hop_by_hop_main;
2729 memset(hm->options, 0, sizeof(hm->options));
2730 memset(hm->trace, 0, sizeof(hm->trace));
2735 VLIB_INIT_FUNCTION (ip6_hop_by_hop_init);
2738 ip6_hbh_register_option (u8 option,
2739 int options(vlib_buffer_t *b, ip6_header_t *ip, ip6_hop_by_hop_option_t *opt),
2740 u8 *trace(u8 *s, ip6_hop_by_hop_option_t *opt))
2742 ip6_main_t * im = &ip6_main;
2743 ip6_hop_by_hop_main_t * hm = &ip6_hop_by_hop_main;
2745 ASSERT (option < ARRAY_LEN (hm->options));
2747 /* Already registered */
2748 if (hm->options[option])
2751 hm->options[option] = options;
2752 hm->trace[option] = trace;
2754 /* Set global variable */
2755 im->hbh_enabled = 1;
2761 ip6_hbh_unregister_option (u8 option)
2763 ip6_main_t * im = &ip6_main;
2764 ip6_hop_by_hop_main_t * hm = &ip6_hop_by_hop_main;
2766 ASSERT (option < ARRAY_LEN (hm->options));
2768 /* Not registered */
2769 if (!hm->options[option])
2772 hm->options[option] = NULL;
2773 hm->trace[option] = NULL;
2775 /* Disable global knob if this was the last option configured */
2778 for (i = 0; i < 256; i++) {
2779 if (hm->options[option]) {
2785 im->hbh_enabled = 0;
2790 /* Global IP6 main. */
2791 ip6_main_t ip6_main;
2793 static clib_error_t *
2794 ip6_lookup_init (vlib_main_t * vm)
2796 ip6_main_t * im = &ip6_main;
2799 for (i = 0; i < ARRAY_LEN (im->fib_masks); i++)
2806 for (j = 0; j < i0; j++)
2807 im->fib_masks[i].as_u32[j] = ~0;
2810 im->fib_masks[i].as_u32[i0] = clib_host_to_net_u32 (pow2_mask (i1) << (32 - i1));
2813 ip_lookup_init (&im->lookup_main, /* is_ip6 */ 1);
2815 if (im->lookup_table_nbuckets == 0)
2816 im->lookup_table_nbuckets = IP6_FIB_DEFAULT_HASH_NUM_BUCKETS;
2818 im->lookup_table_nbuckets = 1<< max_log2 (im->lookup_table_nbuckets);
2820 if (im->lookup_table_size == 0)
2821 im->lookup_table_size = IP6_FIB_DEFAULT_HASH_MEMORY_SIZE;
2823 BV(clib_bihash_init) (&im->ip6_lookup_table, "ip6 lookup table",
2824 im->lookup_table_nbuckets,
2825 im->lookup_table_size);
2827 /* Create FIB with index 0 and table id of 0. */
2828 find_ip6_fib_by_table_index_or_id (im, /* table id */ 0, IP6_ROUTE_FLAG_TABLE_ID);
2832 pn = pg_get_node (ip6_lookup_node.index);
2833 pn->unformat_edit = unformat_pg_ip6_header;
2836 /* Unless explicitly configured, don't process HBH options */
2837 im->hbh_enabled = 0;
2840 icmp6_neighbor_solicitation_header_t p;
2842 memset (&p, 0, sizeof (p));
2844 p.ip.ip_version_traffic_class_and_flow_label = clib_host_to_net_u32 (0x6 << 28);
2845 p.ip.payload_length = clib_host_to_net_u16 (sizeof (p)
2846 - STRUCT_OFFSET_OF (icmp6_neighbor_solicitation_header_t, neighbor));
2847 p.ip.protocol = IP_PROTOCOL_ICMP6;
2848 p.ip.hop_limit = 255;
2849 ip6_set_solicited_node_multicast_address (&p.ip.dst_address, 0);
2851 p.neighbor.icmp.type = ICMP6_neighbor_solicitation;
2853 p.link_layer_option.header.type = ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address;
2854 p.link_layer_option.header.n_data_u64s = sizeof (p.link_layer_option) / sizeof (u64);
2856 vlib_packet_template_init (vm,
2857 &im->discover_neighbor_packet_template,
2859 /* alloc chunk size */ 8,
2860 "ip6 neighbor discovery");
2866 VLIB_INIT_FUNCTION (ip6_lookup_init);
2868 static clib_error_t *
2869 add_del_ip6_interface_table (vlib_main_t * vm,
2870 unformat_input_t * input,
2871 vlib_cli_command_t * cmd)
2873 vnet_main_t * vnm = vnet_get_main();
2874 clib_error_t * error = 0;
2875 u32 sw_if_index, table_id;
2879 if (! unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
2881 error = clib_error_return (0, "unknown interface `%U'",
2882 format_unformat_error, input);
2886 if (unformat (input, "%d", &table_id))
2890 error = clib_error_return (0, "expected table id `%U'",
2891 format_unformat_error, input);
2896 ip6_main_t * im = &ip6_main;
2898 find_ip6_fib_by_table_index_or_id (im, table_id, IP6_ROUTE_FLAG_TABLE_ID);
2902 vec_validate (im->fib_index_by_sw_if_index, sw_if_index);
2903 im->fib_index_by_sw_if_index[sw_if_index] = fib->index;
2911 VLIB_CLI_COMMAND (set_interface_ip_table_command, static) = {
2912 .path = "set interface ip6 table",
2913 .function = add_del_ip6_interface_table,
2914 .short_help = "set interface ip6 table <intfc> <table-id>"
2918 ip6_link_local_address_from_ethernet_mac_address (ip6_address_t *ip,
2921 ip->as_u64[0] = clib_host_to_net_u64 (0xFE80000000000000ULL);
2922 /* Invert the "u" bit */
2923 ip->as_u8 [8] = mac[0] ^ (1<<1);
2924 ip->as_u8 [9] = mac[1];
2925 ip->as_u8 [10] = mac[2];
2926 ip->as_u8 [11] = 0xFF;
2927 ip->as_u8 [12] = 0xFE;
2928 ip->as_u8 [13] = mac[3];
2929 ip->as_u8 [14] = mac[4];
2930 ip->as_u8 [15] = mac[5];
2934 ip6_ethernet_mac_address_from_link_local_address (u8 *mac,
2937 /* Invert the previously inverted "u" bit */
2938 mac[0] = ip->as_u8 [8] ^ (1<<1);
2939 mac[1] = ip->as_u8 [9];
2940 mac[2] = ip->as_u8 [10];
2941 mac[3] = ip->as_u8 [13];
2942 mac[4] = ip->as_u8 [14];
2943 mac[5] = ip->as_u8 [15];
2946 static clib_error_t *
2947 test_ip6_link_command_fn (vlib_main_t * vm,
2948 unformat_input_t * input,
2949 vlib_cli_command_t * cmd)
2952 ip6_address_t _a, *a = &_a;
2954 if (unformat (input, "%U", unformat_ethernet_address, mac))
2956 ip6_link_local_address_from_ethernet_mac_address (a, mac);
2957 vlib_cli_output (vm, "Link local address: %U",
2958 format_ip6_address, a);
2959 ip6_ethernet_mac_address_from_link_local_address (mac, a);
2960 vlib_cli_output (vm, "Original MAC address: %U",
2961 format_ethernet_address, mac);
2967 VLIB_CLI_COMMAND (test_link_command, static) = {
2968 .path = "test ip6 link",
2969 .function = test_ip6_link_command_fn,
2970 .short_help = "test ip6 link <mac-address>",
2973 int vnet_set_ip6_flow_hash (u32 table_id, u32 flow_hash_config)
2975 ip6_main_t * im6 = &ip6_main;
2977 uword * p = hash_get (im6->fib_index_by_table_id, table_id);
2982 fib = vec_elt_at_index (im6->fibs, p[0]);
2984 fib->flow_hash_config = flow_hash_config;
2988 static clib_error_t *
2989 set_ip6_flow_hash_command_fn (vlib_main_t * vm,
2990 unformat_input_t * input,
2991 vlib_cli_command_t * cmd)
2995 u32 flow_hash_config = 0;
2998 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) {
2999 if (unformat (input, "table %d", &table_id))
3002 else if (unformat (input, #a)) { flow_hash_config |= v; matched=1;}
3003 foreach_flow_hash_bit
3009 return clib_error_return (0, "unknown input `%U'",
3010 format_unformat_error, input);
3012 rv = vnet_set_ip6_flow_hash (table_id, flow_hash_config);
3019 return clib_error_return (0, "no such FIB table %d", table_id);
3022 clib_warning ("BUG: illegal flow hash config 0x%x", flow_hash_config);
3029 VLIB_CLI_COMMAND (set_ip6_flow_hash_command, static) = {
3030 .path = "set ip6 flow-hash",
3032 "set ip table flow-hash table <fib-id> src dst sport dport proto reverse",
3033 .function = set_ip6_flow_hash_command_fn,
3036 static clib_error_t *
3037 show_ip6_local_command_fn (vlib_main_t * vm,
3038 unformat_input_t * input,
3039 vlib_cli_command_t * cmd)
3041 ip6_main_t * im = &ip6_main;
3042 ip_lookup_main_t * lm = &im->lookup_main;
3045 vlib_cli_output (vm, "Protocols handled by ip6_local");
3046 for (i = 0; i < ARRAY_LEN(lm->local_next_by_ip_protocol); i++)
3048 if (lm->local_next_by_ip_protocol[i] != IP_LOCAL_NEXT_PUNT)
3049 vlib_cli_output (vm, "%d", i);
3056 VLIB_CLI_COMMAND (show_ip_local, static) = {
3057 .path = "show ip6 local",
3058 .function = show_ip6_local_command_fn,
3059 .short_help = "Show ip6 local protocol table",
3062 int vnet_set_ip6_classify_intfc (vlib_main_t * vm, u32 sw_if_index,
3065 vnet_main_t * vnm = vnet_get_main();
3066 vnet_interface_main_t * im = &vnm->interface_main;
3067 ip6_main_t * ipm = &ip6_main;
3068 ip_lookup_main_t * lm = &ipm->lookup_main;
3069 vnet_classify_main_t * cm = &vnet_classify_main;
3071 if (pool_is_free_index (im->sw_interfaces, sw_if_index))
3072 return VNET_API_ERROR_NO_MATCHING_INTERFACE;
3074 if (table_index != ~0 && pool_is_free_index (cm->tables, table_index))
3075 return VNET_API_ERROR_NO_SUCH_ENTRY;
3077 vec_validate (lm->classify_table_index_by_sw_if_index, sw_if_index);
3078 lm->classify_table_index_by_sw_if_index [sw_if_index] = table_index;
3083 static clib_error_t *
3084 set_ip6_classify_command_fn (vlib_main_t * vm,
3085 unformat_input_t * input,
3086 vlib_cli_command_t * cmd)
3088 u32 table_index = ~0;
3089 int table_index_set = 0;
3090 u32 sw_if_index = ~0;
3093 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) {
3094 if (unformat (input, "table-index %d", &table_index))
3095 table_index_set = 1;
3096 else if (unformat (input, "intfc %U", unformat_vnet_sw_interface,
3097 vnet_get_main(), &sw_if_index))
3103 if (table_index_set == 0)
3104 return clib_error_return (0, "classify table-index must be specified");
3106 if (sw_if_index == ~0)
3107 return clib_error_return (0, "interface / subif must be specified");
3109 rv = vnet_set_ip6_classify_intfc (vm, sw_if_index, table_index);
3116 case VNET_API_ERROR_NO_MATCHING_INTERFACE:
3117 return clib_error_return (0, "No such interface");
3119 case VNET_API_ERROR_NO_SUCH_ENTRY:
3120 return clib_error_return (0, "No such classifier table");
3125 VLIB_CLI_COMMAND (set_ip6_classify_command, static) = {
3126 .path = "set ip6 classify",
3128 "set ip6 classify intfc <int> table-index <index>",
3129 .function = set_ip6_classify_command_fn,
3132 static clib_error_t *
3133 ip6_config (vlib_main_t * vm, unformat_input_t * input)
3135 ip6_main_t * im = &ip6_main;
3140 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) {
3141 if (unformat (input, "hash-buckets %d", &tmp))
3143 else if (unformat (input, "heap-size %dm", &tmp))
3144 heapsize = ((u64)tmp) << 20;
3145 else if (unformat (input, "heap-size %dM", &tmp))
3146 heapsize = ((u64)tmp) << 20;
3147 else if (unformat (input, "heap-size %dg", &tmp))
3148 heapsize = ((u64)tmp) << 30;
3149 else if (unformat (input, "heap-size %dG", &tmp))
3150 heapsize = ((u64)tmp) << 30;
3152 return clib_error_return (0, "unknown input '%U'",
3153 format_unformat_error, input);
3156 im->lookup_table_nbuckets = nbuckets;
3157 im->lookup_table_size = heapsize;
3162 VLIB_EARLY_CONFIG_FUNCTION (ip6_config, "ip6");