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/icmp6.c: ip6 icmp
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 <vlib/vlib.h>
41 #include <vnet/ip/ip.h>
42 #include <vnet/pg/pg.h>
45 format_ip6_icmp_type_and_code (u8 * s, va_list * args)
47 icmp6_type_t type = va_arg (*args, int);
48 u8 code = va_arg (*args, int);
51 #define _(n,f) case n: t = #f; break;
64 return format (s, "unknown 0x%x", type);
66 s = format (s, "%s", t);
69 switch ((type << 8) | code)
71 #define _(a,n,f) case (ICMP6_##a << 8) | (n): t = #f; break;
79 s = format (s, " %s", t);
85 format_icmp6_header (u8 * s, va_list * args)
87 icmp46_header_t *icmp = va_arg (*args, icmp46_header_t *);
88 u32 max_header_bytes = va_arg (*args, u32);
91 if (max_header_bytes < sizeof (icmp[0]))
92 return format (s, "ICMP header truncated");
94 s = format (s, "ICMP %U checksum 0x%x",
95 format_ip6_icmp_type_and_code, icmp->type, icmp->code,
96 clib_net_to_host_u16 (icmp->checksum));
98 if (max_header_bytes >=
99 sizeof (icmp6_neighbor_solicitation_or_advertisement_header_t) &&
100 (icmp->type == ICMP6_neighbor_solicitation ||
101 icmp->type == ICMP6_neighbor_advertisement))
103 icmp6_neighbor_solicitation_or_advertisement_header_t *icmp6_nd =
104 (icmp6_neighbor_solicitation_or_advertisement_header_t *) icmp;
105 s = format (s, "\n target address %U",
106 format_ip6_address, &icmp6_nd->target_address);
113 format_icmp6_input_trace (u8 * s, va_list * va)
115 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*va, vlib_main_t *);
116 CLIB_UNUSED (vlib_node_t * node) = va_arg (*va, vlib_node_t *);
117 icmp6_input_trace_t *t = va_arg (*va, icmp6_input_trace_t *);
120 format_ip6_header, t->packet_data, sizeof (t->packet_data));
125 static char *icmp_error_strings[] = {
133 ICMP_INPUT_NEXT_DROP,
139 uword *type_and_code_by_name;
143 /* Vector dispatch table indexed by [icmp type]. */
144 u8 input_next_index_by_type[256];
146 /* Max valid code indexed by icmp type. */
147 u8 max_valid_code_by_type[256];
149 /* hop_limit must be >= this value for this icmp type. */
150 u8 min_valid_hop_limit_by_type[256];
152 u8 min_valid_length_by_type[256];
155 icmp6_main_t icmp6_main;
158 ip6_icmp_input (vlib_main_t * vm,
159 vlib_node_runtime_t * node, vlib_frame_t * frame)
161 icmp6_main_t *im = &icmp6_main;
163 u32 n_left_from, n_left_to_next, next_index;
165 from = vlib_frame_vector_args (frame);
166 n_left_from = frame->n_vectors;
167 next_index = node->cached_next_index;
169 if (node->flags & VLIB_NODE_FLAG_TRACE)
170 vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors,
172 sizeof (icmp6_input_trace_t));
174 while (n_left_from > 0)
176 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
178 while (n_left_from > 0 && n_left_to_next > 0)
182 icmp46_header_t *icmp0;
184 u32 bi0, next0, error0, len0;
186 bi0 = to_next[0] = from[0];
193 b0 = vlib_get_buffer (vm, bi0);
194 ip0 = vlib_buffer_get_current (b0);
195 icmp0 = ip6_next_header (ip0);
198 error0 = ICMP6_ERROR_NONE;
200 next0 = im->input_next_index_by_type[type0];
202 next0 == ICMP_INPUT_NEXT_DROP ? ICMP6_ERROR_UNKNOWN_TYPE : error0;
204 /* Check code is valid for type. */
207 im->max_valid_code_by_type[type0] ?
208 ICMP6_ERROR_INVALID_CODE_FOR_TYPE : error0;
210 /* Checksum is already validated by ip6_local node so we don't need to check that. */
212 /* Check that hop limit == 255 for certain types. */
215 im->min_valid_hop_limit_by_type[type0] ?
216 ICMP6_ERROR_INVALID_HOP_LIMIT_FOR_TYPE : error0;
218 len0 = clib_net_to_host_u16 (ip0->payload_length);
221 im->min_valid_length_by_type[type0] ?
222 ICMP6_ERROR_LENGTH_TOO_SMALL_FOR_TYPE : error0;
224 b0->error = node->errors[error0];
226 next0 = error0 != ICMP6_ERROR_NONE ? ICMP_INPUT_NEXT_DROP : next0;
228 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
229 to_next, n_left_to_next,
233 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
236 return frame->n_vectors;
240 VLIB_REGISTER_NODE (ip6_icmp_input_node) = {
241 .function = ip6_icmp_input,
242 .name = "ip6-icmp-input",
244 .vector_size = sizeof (u32),
246 .format_trace = format_icmp6_input_trace,
248 .n_errors = ARRAY_LEN (icmp_error_strings),
249 .error_strings = icmp_error_strings,
253 [ICMP_INPUT_NEXT_DROP] = "ip6-drop",
260 ICMP6_ECHO_REQUEST_NEXT_LOOKUP,
261 ICMP6_ECHO_REQUEST_NEXT_OUTPUT,
262 ICMP6_ECHO_REQUEST_N_NEXT,
263 } icmp6_echo_request_next_t;
266 ip6_icmp_echo_request (vlib_main_t * vm,
267 vlib_node_runtime_t * node, vlib_frame_t * frame)
270 u32 n_left_from, n_left_to_next, next_index;
271 ip6_main_t *im = &ip6_main;
273 from = vlib_frame_vector_args (frame);
274 n_left_from = frame->n_vectors;
275 next_index = node->cached_next_index;
277 if (node->flags & VLIB_NODE_FLAG_TRACE)
278 vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors,
280 sizeof (icmp6_input_trace_t));
282 while (n_left_from > 0)
284 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
286 while (n_left_from > 2 && n_left_to_next > 2)
288 vlib_buffer_t *p0, *p1;
289 ip6_header_t *ip0, *ip1;
290 icmp46_header_t *icmp0, *icmp1;
291 ip6_address_t tmp0, tmp1;
292 ip_csum_t sum0, sum1;
294 u32 fib_index0, fib_index1;
295 u32 next0 = ICMP6_ECHO_REQUEST_NEXT_LOOKUP;
296 u32 next1 = ICMP6_ECHO_REQUEST_NEXT_LOOKUP;
298 bi0 = to_next[0] = from[0];
299 bi1 = to_next[1] = from[1];
306 p0 = vlib_get_buffer (vm, bi0);
307 p1 = vlib_get_buffer (vm, bi1);
308 ip0 = vlib_buffer_get_current (p0);
309 ip1 = vlib_buffer_get_current (p1);
310 icmp0 = ip6_next_header (ip0);
311 icmp1 = ip6_next_header (ip1);
313 /* Check icmp type to echo reply and update icmp checksum. */
314 sum0 = icmp0->checksum;
315 sum1 = icmp1->checksum;
317 ASSERT (icmp0->type == ICMP6_echo_request);
318 ASSERT (icmp1->type == ICMP6_echo_request);
319 sum0 = ip_csum_update (sum0, ICMP6_echo_request, ICMP6_echo_reply,
320 icmp46_header_t, type);
321 sum1 = ip_csum_update (sum1, ICMP6_echo_request, ICMP6_echo_reply,
322 icmp46_header_t, type);
324 icmp0->checksum = ip_csum_fold (sum0);
325 icmp1->checksum = ip_csum_fold (sum1);
327 icmp0->type = ICMP6_echo_reply;
328 icmp1->type = ICMP6_echo_reply;
330 /* Swap source and destination address. */
331 tmp0 = ip0->src_address;
332 tmp1 = ip1->src_address;
334 ip0->src_address = ip0->dst_address;
335 ip1->src_address = ip1->dst_address;
337 ip0->dst_address = tmp0;
338 ip1->dst_address = tmp1;
341 ip0->hop_limit = im->host_config.ttl;
342 ip1->hop_limit = im->host_config.ttl;
344 /* Determine the correct lookup fib indices... */
345 fib_index0 = vec_elt (im->fib_index_by_sw_if_index,
346 vnet_buffer (p0)->sw_if_index[VLIB_RX]);
347 vnet_buffer (p0)->sw_if_index[VLIB_TX] = fib_index0;
348 /* Determine the correct lookup fib indices... */
349 fib_index1 = vec_elt (im->fib_index_by_sw_if_index,
350 vnet_buffer (p1)->sw_if_index[VLIB_RX]);
351 vnet_buffer (p1)->sw_if_index[VLIB_TX] = fib_index1;
353 /* verify speculative enqueues, maybe switch current next frame */
354 /* if next0==next1==next_index then nothing special needs to be done */
355 vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
356 to_next, n_left_to_next,
357 bi0, bi1, next0, next1);
360 while (n_left_from > 0 && n_left_to_next > 0)
364 icmp46_header_t *icmp0;
369 u32 next0 = ICMP6_ECHO_REQUEST_NEXT_LOOKUP;
371 bi0 = to_next[0] = from[0];
378 p0 = vlib_get_buffer (vm, bi0);
379 ip0 = vlib_buffer_get_current (p0);
380 icmp0 = ip6_next_header (ip0);
382 /* Check icmp type to echo reply and update icmp checksum. */
383 sum0 = icmp0->checksum;
385 ASSERT (icmp0->type == ICMP6_echo_request);
386 sum0 = ip_csum_update (sum0, ICMP6_echo_request, ICMP6_echo_reply,
387 icmp46_header_t, type);
389 icmp0->checksum = ip_csum_fold (sum0);
391 icmp0->type = ICMP6_echo_reply;
393 /* Swap source and destination address. */
394 tmp0 = ip0->src_address;
395 ip0->src_address = ip0->dst_address;
396 ip0->dst_address = tmp0;
398 ip0->hop_limit = im->host_config.ttl;
400 /* if the packet is link local, we'll bounce through the link-local
401 * table with the RX interface correctly set */
402 fib_index0 = vec_elt (im->fib_index_by_sw_if_index,
403 vnet_buffer (p0)->sw_if_index[VLIB_RX]);
404 vnet_buffer (p0)->sw_if_index[VLIB_TX] = fib_index0;
406 /* Verify speculative enqueue, maybe switch current next frame */
407 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
408 to_next, n_left_to_next,
412 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
415 vlib_error_count (vm, ip6_icmp_input_node.index,
416 ICMP6_ERROR_ECHO_REPLIES_SENT, frame->n_vectors);
418 return frame->n_vectors;
422 VLIB_REGISTER_NODE (ip6_icmp_echo_request_node,static) = {
423 .function = ip6_icmp_echo_request,
424 .name = "ip6-icmp-echo-request",
426 .vector_size = sizeof (u32),
428 .format_trace = format_icmp6_input_trace,
430 .n_next_nodes = ICMP6_ECHO_REQUEST_N_NEXT,
432 [ICMP6_ECHO_REQUEST_NEXT_LOOKUP] = "ip6-lookup",
433 [ICMP6_ECHO_REQUEST_NEXT_OUTPUT] = "interface-output",
440 IP6_ICMP_ERROR_NEXT_DROP,
441 IP6_ICMP_ERROR_NEXT_LOOKUP,
442 IP6_ICMP_ERROR_N_NEXT,
443 } ip6_icmp_error_next_t;
446 icmp6_error_set_vnet_buffer (vlib_buffer_t * b, u8 type, u8 code, u32 data)
448 vnet_buffer (b)->ip.icmp.type = type;
449 vnet_buffer (b)->ip.icmp.code = code;
450 vnet_buffer (b)->ip.icmp.data = data;
454 icmp6_icmp_type_to_error (u8 type)
458 case ICMP6_destination_unreachable:
459 return ICMP6_ERROR_DEST_UNREACH_SENT;
460 case ICMP6_packet_too_big:
461 return ICMP6_ERROR_PACKET_TOO_BIG_SENT;
462 case ICMP6_time_exceeded:
463 return ICMP6_ERROR_TTL_EXPIRE_SENT;
464 case ICMP6_parameter_problem:
465 return ICMP6_ERROR_PARAM_PROBLEM_SENT;
467 return ICMP6_ERROR_DROP;
472 ip6_icmp_error (vlib_main_t * vm,
473 vlib_node_runtime_t * node, vlib_frame_t * frame)
476 uword n_left_from, n_left_to_next;
477 ip6_icmp_error_next_t next_index;
478 ip6_main_t *im = &ip6_main;
479 ip_lookup_main_t *lm = &im->lookup_main;
481 from = vlib_frame_vector_args (frame);
482 n_left_from = frame->n_vectors;
483 next_index = node->cached_next_index;
485 if (node->flags & VLIB_NODE_FLAG_TRACE)
486 vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors,
488 sizeof (icmp6_input_trace_t));
490 while (n_left_from > 0)
492 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
494 while (n_left_from > 0 && n_left_to_next > 0)
497 * Duplicate first buffer and free the original chain. Keep
498 * as much of the original packet as possible, within the
499 * minimum MTU. We chat "a little" here by keeping whatever
500 * is available in the first buffer.
504 u32 org_pi0 = from[0];
505 u32 next0 = IP6_ICMP_ERROR_NEXT_LOOKUP;
506 u8 error0 = ICMP6_ERROR_NONE;
507 vlib_buffer_t *p0, *org_p0;
508 ip6_header_t *ip0, *out_ip0;
509 icmp46_header_t *icmp0;
510 u32 sw_if_index0, if_add_index0;
513 org_p0 = vlib_get_buffer (vm, org_pi0);
514 p0 = vlib_buffer_copy_no_chain (vm, org_p0, &pi0);
515 if (!p0 || pi0 == ~0) /* Out of buffers */
518 /* Speculatively enqueue p0 to the current next frame */
525 ip0 = vlib_buffer_get_current (p0);
526 sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
528 /* Add IP header and ICMPv6 header including a 4 byte data field */
529 vlib_buffer_advance (p0,
530 -(sizeof (ip6_header_t) +
531 sizeof (icmp46_header_t) + 4));
533 vnet_buffer (p0)->sw_if_index[VLIB_TX] = ~0;
534 p0->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
536 p0->current_length > 1280 ? 1280 : p0->current_length;
538 out_ip0 = vlib_buffer_get_current (p0);
539 icmp0 = (icmp46_header_t *) & out_ip0[1];
541 /* Fill ip header fields */
542 out_ip0->ip_version_traffic_class_and_flow_label =
543 clib_host_to_net_u32 (0x6 << 28);
545 out_ip0->payload_length =
546 clib_host_to_net_u16 (p0->current_length - sizeof (ip6_header_t));
547 out_ip0->protocol = IP_PROTOCOL_ICMP6;
548 out_ip0->hop_limit = 0xff;
549 out_ip0->dst_address = ip0->src_address;
551 lm->if_address_pool_index_by_sw_if_index[sw_if_index0];
552 if (PREDICT_TRUE (if_add_index0 != ~0))
554 ip_interface_address_t *if_add =
555 pool_elt_at_index (lm->if_address_pool, if_add_index0);
556 ip6_address_t *if_ip =
557 ip_interface_address_get_address (lm, if_add);
558 out_ip0->src_address = *if_ip;
560 else /* interface has no IP6 address - should not happen */
562 next0 = IP6_ICMP_ERROR_NEXT_DROP;
563 error0 = ICMP6_ERROR_DROP;
566 /* Fill icmp header fields */
567 icmp0->type = vnet_buffer (p0)->ip.icmp.type;
568 icmp0->code = vnet_buffer (p0)->ip.icmp.code;
569 *((u32 *) (icmp0 + 1)) =
570 clib_host_to_net_u32 (vnet_buffer (p0)->ip.icmp.data);
573 ip6_tcp_udp_icmp_compute_checksum (vm, p0, out_ip0,
576 /* Update error status */
577 if (error0 == ICMP6_ERROR_NONE)
578 error0 = icmp6_icmp_type_to_error (icmp0->type);
580 vlib_error_count (vm, node->node_index, error0, 1);
582 /* Verify speculative enqueue, maybe switch current next frame */
583 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
584 to_next, n_left_to_next,
587 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
591 * push the original buffers to error-drop, so that
592 * they can get the error counters handled, then freed
594 vlib_buffer_enqueue_to_single_next (vm, node,
595 vlib_frame_vector_args (frame),
596 IP6_ICMP_ERROR_NEXT_DROP,
599 return frame->n_vectors;
603 VLIB_REGISTER_NODE (ip6_icmp_error_node) = {
604 .function = ip6_icmp_error,
605 .name = "ip6-icmp-error",
606 .vector_size = sizeof (u32),
608 .n_errors = ARRAY_LEN (icmp_error_strings),
609 .error_strings = icmp_error_strings,
611 .n_next_nodes = IP6_ICMP_ERROR_N_NEXT,
613 [IP6_ICMP_ERROR_NEXT_DROP] = "error-drop",
614 [IP6_ICMP_ERROR_NEXT_LOOKUP] = "ip6-lookup",
617 .format_trace = format_icmp6_input_trace,
623 unformat_icmp_type_and_code (unformat_input_t * input, va_list * args)
625 icmp46_header_t *h = va_arg (*args, icmp46_header_t *);
626 icmp6_main_t *cm = &icmp6_main;
629 if (unformat_user (input, unformat_vlib_number_by_name,
630 cm->type_and_code_by_name, &i))
632 h->type = (i >> 8) & 0xff;
633 h->code = (i >> 0) & 0xff;
635 else if (unformat_user (input, unformat_vlib_number_by_name,
636 cm->type_by_name, &i))
648 icmp6_pg_edit_function (pg_main_t * pg,
650 pg_edit_group_t * g, u32 * packets, u32 n_packets)
652 vlib_main_t *vm = vlib_get_main ();
653 u32 ip_offset, icmp_offset;
656 icmp_offset = g->start_byte_offset;
657 ip_offset = (g - 1)->start_byte_offset;
659 while (n_packets >= 1)
663 icmp46_header_t *icmp0;
665 p0 = vlib_get_buffer (vm, packets[0]);
669 ASSERT (p0->current_data == 0);
670 ip0 = (void *) (p0->data + ip_offset);
671 icmp0 = (void *) (p0->data + icmp_offset);
673 icmp0->checksum = ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip0,
675 ASSERT (bogus_length == 0);
681 pg_edit_t type, code;
683 } pg_icmp46_header_t;
686 pg_icmp_header_init (pg_icmp46_header_t * p)
688 /* Initialize fields that are not bit fields in the IP header. */
689 #define _(f) pg_edit_init (&p->f, icmp46_header_t, f);
697 unformat_pg_icmp_header (unformat_input_t * input, va_list * args)
699 pg_stream_t *s = va_arg (*args, pg_stream_t *);
700 pg_icmp46_header_t *p;
703 p = pg_create_edit_group (s, sizeof (p[0]), sizeof (icmp46_header_t),
705 pg_icmp_header_init (p);
707 p->checksum.type = PG_EDIT_UNSPECIFIED;
712 if (!unformat (input, "ICMP %U", unformat_icmp_type_and_code, &tmp))
715 pg_edit_set_fixed (&p->type, tmp.type);
716 pg_edit_set_fixed (&p->code, tmp.code);
722 if (unformat (input, "checksum %U",
723 unformat_pg_edit, unformat_pg_number, &p->checksum))
726 /* Can't parse input: try next protocol level. */
731 if (!unformat_user (input, unformat_pg_payload, s))
734 if (p->checksum.type == PG_EDIT_UNSPECIFIED)
736 pg_edit_group_t *g = pg_stream_get_group (s, group_index);
737 g->edit_function = icmp6_pg_edit_function;
738 g->edit_function_opaque = 0;
744 /* Free up any edits we may have added. */
745 pg_free_edit_group (s);
750 icmp6_register_type (vlib_main_t * vm, icmp6_type_t type, u32 node_index)
752 icmp6_main_t *im = &icmp6_main;
754 ASSERT ((int) type < ARRAY_LEN (im->input_next_index_by_type));
755 im->input_next_index_by_type[type]
756 = vlib_node_add_next (vm, ip6_icmp_input_node.index, node_index);
759 static clib_error_t *
760 icmp6_init (vlib_main_t * vm)
762 ip_main_t *im = &ip_main;
763 ip_protocol_info_t *pi;
764 icmp6_main_t *cm = &icmp6_main;
767 error = vlib_call_init_function (vm, ip_main_init);
772 pi = ip_get_protocol_info (im, IP_PROTOCOL_ICMP6);
773 pi->format_header = format_icmp6_header;
774 pi->unformat_pg_edit = unformat_pg_icmp_header;
776 cm->type_by_name = hash_create_string (0, sizeof (uword));
777 #define _(n,t) hash_set_mem (cm->type_by_name, #t, (n));
781 cm->type_and_code_by_name = hash_create_string (0, sizeof (uword));
782 #define _(a,n,t) hash_set_mem (cm->type_by_name, #t, (n) | (ICMP6_##a << 8));
786 clib_memset (cm->input_next_index_by_type,
787 ICMP_INPUT_NEXT_DROP, sizeof (cm->input_next_index_by_type));
788 clib_memset (cm->max_valid_code_by_type, 0,
789 sizeof (cm->max_valid_code_by_type));
791 #define _(a,n,t) cm->max_valid_code_by_type[ICMP6_##a] = clib_max (cm->max_valid_code_by_type[ICMP6_##a], n);
795 clib_memset (cm->min_valid_hop_limit_by_type, 0,
796 sizeof (cm->min_valid_hop_limit_by_type));
797 cm->min_valid_hop_limit_by_type[ICMP6_router_solicitation] = 255;
798 cm->min_valid_hop_limit_by_type[ICMP6_router_advertisement] = 255;
799 cm->min_valid_hop_limit_by_type[ICMP6_neighbor_solicitation] = 255;
800 cm->min_valid_hop_limit_by_type[ICMP6_neighbor_advertisement] = 255;
801 cm->min_valid_hop_limit_by_type[ICMP6_redirect] = 255;
803 clib_memset (cm->min_valid_length_by_type, sizeof (icmp46_header_t),
804 sizeof (cm->min_valid_length_by_type));
805 cm->min_valid_length_by_type[ICMP6_router_solicitation] =
806 sizeof (icmp6_neighbor_discovery_header_t);
807 cm->min_valid_length_by_type[ICMP6_router_advertisement] =
808 sizeof (icmp6_router_advertisement_header_t);
809 cm->min_valid_length_by_type[ICMP6_neighbor_solicitation] =
810 sizeof (icmp6_neighbor_solicitation_or_advertisement_header_t);
811 cm->min_valid_length_by_type[ICMP6_neighbor_advertisement] =
812 sizeof (icmp6_neighbor_solicitation_or_advertisement_header_t);
813 cm->min_valid_length_by_type[ICMP6_redirect] =
814 sizeof (icmp6_redirect_header_t);
816 icmp6_register_type (vm, ICMP6_echo_request,
817 ip6_icmp_echo_request_node.index);
819 return vlib_call_init_function (vm, ip6_neighbor_init);
822 VLIB_INIT_FUNCTION (icmp6_init);
825 * fd.io coding-style-patch-verification: ON
828 * eval: (c-set-style "gnu")