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>
44 static u8 * format_ip6_icmp_type_and_code (u8 * s, va_list * args)
46 icmp6_type_t type = va_arg (*args, int);
47 u8 code = va_arg (*args, int);
50 #define _(n,f) case n: t = #f; break;
63 return format (s, "unknown 0x%x", type);
65 s = format (s, "%s", t);
68 switch ((type << 8) | code)
70 #define _(a,n,f) case (ICMP6_##a << 8) | (n): t = #f; break;
78 s = format (s, " %s", t);
83 static u8 * format_icmp6_header (u8 * s, va_list * args)
85 icmp46_header_t * icmp = va_arg (*args, icmp46_header_t *);
86 u32 max_header_bytes = va_arg (*args, u32);
89 if (max_header_bytes < sizeof (icmp[0]))
90 return format (s, "ICMP header truncated");
92 s = format (s, "ICMP %U checksum 0x%x",
93 format_ip6_icmp_type_and_code, icmp->type, icmp->code,
94 clib_net_to_host_u16 (icmp->checksum));
96 if (max_header_bytes >=
97 sizeof(icmp6_neighbor_solicitation_or_advertisement_header_t) &&
98 (icmp->type == ICMP6_neighbor_solicitation ||
99 icmp->type == ICMP6_neighbor_advertisement))
101 icmp6_neighbor_solicitation_or_advertisement_header_t *icmp6_nd =
102 (icmp6_neighbor_solicitation_or_advertisement_header_t *) icmp;
103 s = format (s, "\n target address %U",
104 format_ip6_address, &icmp6_nd->target_address);
110 u8 * format_icmp6_input_trace (u8 * s, va_list * va)
112 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*va, vlib_main_t *);
113 CLIB_UNUSED (vlib_node_t * node) = va_arg (*va, vlib_node_t *);
114 icmp6_input_trace_t * t = va_arg (*va, icmp6_input_trace_t *);
118 t->packet_data, sizeof (t->packet_data));
123 static char * icmp_error_strings[] = {
130 ICMP_INPUT_NEXT_DROP,
135 uword * type_and_code_by_name;
137 uword * type_by_name;
139 /* Vector dispatch table indexed by [icmp type]. */
140 u8 input_next_index_by_type[256];
142 /* Max valid code indexed by icmp type. */
143 u8 max_valid_code_by_type[256];
145 /* hop_limit must be >= this value for this icmp type. */
146 u8 min_valid_hop_limit_by_type[256];
148 u8 min_valid_length_by_type[256];
151 icmp6_main_t icmp6_main;
154 ip6_icmp_input (vlib_main_t * vm,
155 vlib_node_runtime_t * node,
156 vlib_frame_t * frame)
158 icmp6_main_t * im = &icmp6_main;
159 u32 * from, * to_next;
160 u32 n_left_from, n_left_to_next, next_index;
162 from = vlib_frame_vector_args (frame);
163 n_left_from = frame->n_vectors;
164 next_index = node->cached_next_index;
166 if (node->flags & VLIB_NODE_FLAG_TRACE)
167 vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors,
169 sizeof (icmp6_input_trace_t));
171 while (n_left_from > 0)
173 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
175 while (n_left_from > 0 && n_left_to_next > 0)
179 icmp46_header_t * icmp0;
181 u32 bi0, next0, error0, len0;
183 bi0 = to_next[0] = from[0];
190 b0 = vlib_get_buffer (vm, bi0);
191 ip0 = vlib_buffer_get_current (b0);
192 icmp0 = ip6_next_header (ip0);
195 error0 = ICMP6_ERROR_NONE;
197 next0 = im->input_next_index_by_type[type0];
198 error0 = next0 == ICMP_INPUT_NEXT_DROP ? ICMP6_ERROR_UNKNOWN_TYPE : error0;
200 /* Check code is valid for type. */
201 error0 = icmp0->code > im->max_valid_code_by_type[type0] ? ICMP6_ERROR_INVALID_CODE_FOR_TYPE : error0;
203 /* Checksum is already validated by ip6_local node so we don't need to check that. */
205 /* Check that hop limit == 255 for certain types. */
206 error0 = ip0->hop_limit < im->min_valid_hop_limit_by_type[type0] ? ICMP6_ERROR_INVALID_HOP_LIMIT_FOR_TYPE : error0;
208 len0 = clib_net_to_host_u16 (ip0->payload_length);
209 error0 = len0 < im->min_valid_length_by_type[type0] ? ICMP6_ERROR_LENGTH_TOO_SMALL_FOR_TYPE : error0;
211 b0->error = node->errors[error0];
213 next0 = error0 != ICMP6_ERROR_NONE ? ICMP_INPUT_NEXT_DROP : next0;
215 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
216 to_next, n_left_to_next,
220 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
223 return frame->n_vectors;
226 VLIB_REGISTER_NODE (ip6_icmp_input_node) = {
227 .function = ip6_icmp_input,
228 .name = "ip6-icmp-input",
230 .vector_size = sizeof (u32),
232 .format_trace = format_icmp6_input_trace,
234 .n_errors = ARRAY_LEN (icmp_error_strings),
235 .error_strings = icmp_error_strings,
239 [ICMP_INPUT_NEXT_DROP] = "error-drop",
244 ICMP6_ECHO_REQUEST_NEXT_LOOKUP,
245 ICMP6_ECHO_REQUEST_NEXT_OUTPUT,
246 ICMP6_ECHO_REQUEST_N_NEXT,
247 } icmp6_echo_request_next_t;
250 ip6_icmp_echo_request (vlib_main_t * vm,
251 vlib_node_runtime_t * node,
252 vlib_frame_t * frame)
254 u32 * from, * to_next;
255 u32 n_left_from, n_left_to_next, next_index;
256 ip6_main_t * im = &ip6_main;
258 from = vlib_frame_vector_args (frame);
259 n_left_from = frame->n_vectors;
260 next_index = node->cached_next_index;
262 if (node->flags & VLIB_NODE_FLAG_TRACE)
263 vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors,
265 sizeof (icmp6_input_trace_t));
267 while (n_left_from > 0)
269 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
271 while (n_left_from > 2 && n_left_to_next > 2)
273 vlib_buffer_t * p0, * p1;
274 ip6_header_t * ip0, * ip1;
275 icmp46_header_t * icmp0, * icmp1;
276 ip6_address_t tmp0, tmp1;
277 ip_csum_t sum0, sum1;
279 u32 fib_index0, fib_index1;
280 u32 next0 = ICMP6_ECHO_REQUEST_NEXT_LOOKUP;
281 u32 next1 = ICMP6_ECHO_REQUEST_NEXT_LOOKUP;
283 bi0 = to_next[0] = from[0];
284 bi1 = to_next[1] = from[1];
291 p0 = vlib_get_buffer (vm, bi0);
292 p1 = vlib_get_buffer (vm, bi1);
293 ip0 = vlib_buffer_get_current (p0);
294 ip1 = vlib_buffer_get_current (p1);
295 icmp0 = ip6_next_header (ip0);
296 icmp1 = ip6_next_header (ip1);
298 /* Check icmp type to echo reply and update icmp checksum. */
299 sum0 = icmp0->checksum;
300 sum1 = icmp1->checksum;
302 ASSERT (icmp0->type == ICMP6_echo_request);
303 ASSERT (icmp1->type == ICMP6_echo_request);
304 sum0 = ip_csum_update (sum0, ICMP6_echo_request, ICMP6_echo_reply,
305 icmp46_header_t, type);
306 sum1 = ip_csum_update (sum1, ICMP6_echo_request, ICMP6_echo_reply,
307 icmp46_header_t, type);
309 icmp0->checksum = ip_csum_fold (sum0);
310 icmp1->checksum = ip_csum_fold (sum1);
312 icmp0->type = ICMP6_echo_reply;
313 icmp1->type = ICMP6_echo_reply;
315 /* Swap source and destination address. */
316 tmp0 = ip0->src_address;
317 tmp1 = ip1->src_address;
319 ip0->src_address = ip0->dst_address;
320 ip1->src_address = ip1->dst_address;
322 ip0->dst_address = tmp0;
323 ip1->dst_address = tmp1;
326 ip0->hop_limit = im->host_config.ttl;
327 ip1->hop_limit = im->host_config.ttl;
329 if (ip6_address_is_link_local_unicast (&ip0->dst_address))
331 ethernet_header_t *eth0;
333 /* For link local, reuse current MAC header by sawpping
334 * SMAC to DMAC instead of IP6 lookup since link local
335 * is not in the IP6 FIB */
336 vlib_buffer_reset (p0);
337 eth0 = vlib_buffer_get_current (p0);
338 memcpy (tmp_mac, eth0->dst_address, 6);
339 memcpy (eth0->dst_address, eth0->src_address, 6);
340 memcpy (eth0->src_address, tmp_mac, 6);
341 vnet_buffer(p0)->sw_if_index[VLIB_TX] =
342 vnet_buffer (p0)->sw_if_index[VLIB_RX];
343 next0 = ICMP6_ECHO_REQUEST_NEXT_OUTPUT;
347 /* Determine the correct lookup fib indices... */
348 fib_index0 = vec_elt (im->fib_index_by_sw_if_index,
349 vnet_buffer (p0)->sw_if_index[VLIB_RX]);
350 vnet_buffer (p0)->sw_if_index[VLIB_TX] = fib_index0;
353 if (ip6_address_is_link_local_unicast (&ip1->dst_address))
355 ethernet_header_t *eth1;
357 /* For link local, reuse current MAC header by sawpping
358 * SMAC to DMAC instead of IP6 lookup since link local
359 * is not in the IP6 FIB */
360 vlib_buffer_reset (p1);
361 eth1 = vlib_buffer_get_current (p1);
362 memcpy (tmp_mac, eth1->dst_address, 6);
363 memcpy (eth1->dst_address, eth1->src_address, 6);
364 memcpy (eth1->src_address, tmp_mac, 6);
365 vnet_buffer(p1)->sw_if_index[VLIB_TX] =
366 vnet_buffer (p1)->sw_if_index[VLIB_RX];
367 next1 = ICMP6_ECHO_REQUEST_NEXT_OUTPUT;
371 /* Determine the correct lookup fib indices... */
372 fib_index1 = vec_elt (im->fib_index_by_sw_if_index,
373 vnet_buffer (p1)->sw_if_index[VLIB_RX]);
374 vnet_buffer (p1)->sw_if_index[VLIB_TX] = fib_index1;
377 vnet_buffer (p0)->sw_if_index[VLIB_RX]
378 = vnet_main.local_interface_sw_if_index;
379 vnet_buffer (p1)->sw_if_index[VLIB_RX]
380 = vnet_main.local_interface_sw_if_index;
382 /* verify speculative enqueues, maybe switch current next frame */
383 /* if next0==next1==next_index then nothing special needs to be done */
384 vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
385 to_next, n_left_to_next,
386 bi0, bi1, next0, next1);
389 while (n_left_from > 0 && n_left_to_next > 0)
393 icmp46_header_t * icmp0;
398 u32 next0 = ICMP6_ECHO_REQUEST_NEXT_LOOKUP;
400 bi0 = to_next[0] = from[0];
407 p0 = vlib_get_buffer (vm, bi0);
408 ip0 = vlib_buffer_get_current (p0);
409 icmp0 = ip6_next_header (ip0);
411 /* Check icmp type to echo reply and update icmp checksum. */
412 sum0 = icmp0->checksum;
414 ASSERT (icmp0->type == ICMP6_echo_request);
415 sum0 = ip_csum_update (sum0, ICMP6_echo_request, ICMP6_echo_reply,
416 icmp46_header_t, type);
418 icmp0->checksum = ip_csum_fold (sum0);
420 icmp0->type = ICMP6_echo_reply;
422 /* Swap source and destination address. */
423 tmp0 = ip0->src_address;
424 ip0->src_address = ip0->dst_address;
425 ip0->dst_address = tmp0;
427 ip0->hop_limit = im->host_config.ttl;
429 if (ip6_address_is_link_local_unicast (&ip0->dst_address))
431 ethernet_header_t *eth0;
433 /* For link local, reuse current MAC header by sawpping
434 * SMAC to DMAC instead of IP6 lookup since link local
435 * is not in the IP6 FIB */
436 vlib_buffer_reset (p0);
437 eth0 = vlib_buffer_get_current (p0);
438 memcpy (tmp_mac, eth0->dst_address, 6);
439 memcpy (eth0->dst_address, eth0->src_address, 6);
440 memcpy (eth0->src_address, tmp_mac, 6);
441 vnet_buffer(p0)->sw_if_index[VLIB_TX] =
442 vnet_buffer (p0)->sw_if_index[VLIB_RX];
443 next0 = ICMP6_ECHO_REQUEST_NEXT_OUTPUT;
447 fib_index0 = vec_elt (im->fib_index_by_sw_if_index,
448 vnet_buffer (p0)->sw_if_index[VLIB_RX]);
449 vnet_buffer (p0)->sw_if_index[VLIB_TX] = fib_index0;
451 vnet_buffer (p0)->sw_if_index[VLIB_RX]
452 = vnet_main.local_interface_sw_if_index;
454 /* Verify speculative enqueue, maybe switch current next frame */
455 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
456 to_next, n_left_to_next,
460 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
463 vlib_error_count (vm, ip6_icmp_input_node.index,
464 ICMP6_ERROR_ECHO_REPLIES_SENT,
467 return frame->n_vectors;
470 VLIB_REGISTER_NODE (ip6_icmp_echo_request_node,static) = {
471 .function = ip6_icmp_echo_request,
472 .name = "ip6-icmp-echo-request",
474 .vector_size = sizeof (u32),
476 .format_trace = format_icmp6_input_trace,
478 .n_next_nodes = ICMP6_ECHO_REQUEST_N_NEXT,
480 [ICMP6_ECHO_REQUEST_NEXT_LOOKUP] = "ip6-lookup",
481 [ICMP6_ECHO_REQUEST_NEXT_OUTPUT] = "interface-output",
486 IP6_ICMP_ERROR_NEXT_DROP,
487 IP6_ICMP_ERROR_NEXT_LOOKUP,
488 IP6_ICMP_ERROR_N_NEXT,
489 } ip6_icmp_error_next_t;
492 icmp6_error_set_vnet_buffer (vlib_buffer_t *b, u8 type, u8 code, u32 data)
494 vnet_buffer(b)->ip.icmp.type = type;
495 vnet_buffer(b)->ip.icmp.code = code;
496 vnet_buffer(b)->ip.icmp.data = data;
500 icmp6_icmp_type_to_error (u8 type)
503 case ICMP6_destination_unreachable:
504 return ICMP6_ERROR_DEST_UNREACH_SENT;
505 case ICMP6_packet_too_big:
506 return ICMP6_ERROR_PACKET_TOO_BIG_SENT;
507 case ICMP6_time_exceeded:
508 return ICMP6_ERROR_TTL_EXPIRE_SENT;
509 case ICMP6_parameter_problem:
510 return ICMP6_ERROR_PARAM_PROBLEM_SENT;
512 return ICMP6_ERROR_DROP;
517 ip6_icmp_error (vlib_main_t * vm,
518 vlib_node_runtime_t * node,
519 vlib_frame_t * frame)
521 u32 * from, * to_next;
522 uword n_left_from, n_left_to_next;
523 ip6_icmp_error_next_t next_index;
524 ip6_main_t *im = &ip6_main;
525 ip_lookup_main_t * lm = &im->lookup_main;
527 from = vlib_frame_vector_args(frame);
528 n_left_from = frame->n_vectors;
529 next_index = node->cached_next_index;
531 if (node->flags & VLIB_NODE_FLAG_TRACE)
532 vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors,
533 /* stride */ 1, sizeof (icmp6_input_trace_t));
535 while (n_left_from > 0)
537 vlib_get_next_frame(vm, node, next_index, to_next, n_left_to_next);
539 while (n_left_from > 0 && n_left_to_next > 0)
542 u32 next0 = IP6_ICMP_ERROR_NEXT_LOOKUP;
543 u8 error0 = ICMP6_ERROR_NONE;
545 ip6_header_t * ip0, * out_ip0;
546 icmp46_header_t * icmp0;
547 u32 sw_if_index0, if_add_index0;
550 /* Speculatively enqueue p0 to the current next frame */
557 p0 = vlib_get_buffer(vm, pi0);
558 ip0 = vlib_buffer_get_current(p0);
559 sw_if_index0 = vnet_buffer(p0)->sw_if_index[VLIB_RX];
561 /* RFC4443 says to keep as much of the original packet as possible
562 * within the minimum MTU. We cheat "a little" here by keeping whatever fits
563 * in the first buffer, to be more efficient */
564 if (PREDICT_FALSE(p0->total_length_not_including_first_buffer))
565 { /* clear current_length of all other buffers in chain */
566 vlib_buffer_t *b = p0;
567 p0->total_length_not_including_first_buffer = 0;
568 while (b->flags & VLIB_BUFFER_NEXT_PRESENT)
570 b = vlib_get_buffer (vm, b->next_buffer);
571 b->current_length = 0;
574 p0->current_length = p0->current_length > 1280 ? 1280 : p0->current_length;
576 /* Add IP header and ICMPv6 header including a 4 byte data field */
577 vlib_buffer_advance(p0,
578 -sizeof(ip6_header_t)-sizeof(icmp46_header_t)-4);
579 out_ip0 = vlib_buffer_get_current(p0);
580 icmp0 = (icmp46_header_t *) &out_ip0[1];
582 /* Fill ip header fields */
583 out_ip0->ip_version_traffic_class_and_flow_label =
584 clib_host_to_net_u32(0x6<<28);
586 out_ip0->payload_length = clib_host_to_net_u16(p0->current_length - sizeof(ip6_header_t));
587 out_ip0->protocol = IP_PROTOCOL_ICMP6;
588 out_ip0->hop_limit = 0xff;
589 out_ip0->dst_address = ip0->src_address;
591 lm->if_address_pool_index_by_sw_if_index[sw_if_index0];
592 if (PREDICT_TRUE(if_add_index0 != ~0))
594 ip_interface_address_t *if_add =
595 pool_elt_at_index(lm->if_address_pool, if_add_index0);
596 ip6_address_t *if_ip =
597 ip_interface_address_get_address(lm, if_add);
598 out_ip0->src_address = *if_ip;
600 else /* interface has no IP6 address - should not happen */
602 next0 = IP6_ICMP_ERROR_NEXT_DROP;
603 error0 = ICMP6_ERROR_DROP;
606 /* Fill icmp header fields */
607 icmp0->type = vnet_buffer(p0)->ip.icmp.type;
608 icmp0->code = vnet_buffer(p0)->ip.icmp.code;
609 *((u32 *)(icmp0 + 1)) = clib_host_to_net_u32(vnet_buffer(p0)->ip.icmp.data);
611 icmp0->checksum = ip6_tcp_udp_icmp_compute_checksum(
612 vm, p0, out_ip0, &bogus_length);
616 /* Update error status */
617 if (error0 == ICMP6_ERROR_NONE)
618 error0 = icmp6_icmp_type_to_error(icmp0->type);
619 vlib_error_count(vm, node->node_index, error0, 1);
621 /* Verify speculative enqueue, maybe switch current next frame */
622 vlib_validate_buffer_enqueue_x1(vm, node, next_index,
623 to_next, n_left_to_next,
626 vlib_put_next_frame(vm, node, next_index, n_left_to_next);
629 return frame->n_vectors;
632 VLIB_REGISTER_NODE (ip6_icmp_error_node) = {
633 .function = ip6_icmp_error,
634 .name = "ip6-icmp-error",
635 .vector_size = sizeof (u32),
637 .n_errors = ARRAY_LEN (icmp_error_strings),
638 .error_strings = icmp_error_strings,
640 .n_next_nodes = IP6_ICMP_ERROR_N_NEXT,
642 [IP6_ICMP_ERROR_NEXT_DROP] = "error-drop",
643 [IP6_ICMP_ERROR_NEXT_LOOKUP] = "ip6-lookup",
646 .format_trace = format_icmp6_input_trace,
650 static uword unformat_icmp_type_and_code (unformat_input_t * input, va_list * args)
652 icmp46_header_t * h = va_arg (*args, icmp46_header_t *);
653 icmp6_main_t * cm = &icmp6_main;
656 if (unformat_user (input, unformat_vlib_number_by_name,
657 cm->type_and_code_by_name, &i))
659 h->type = (i >> 8) & 0xff;
660 h->code = (i >> 0) & 0xff;
662 else if (unformat_user (input, unformat_vlib_number_by_name,
663 cm->type_by_name, &i))
675 icmp6_pg_edit_function (pg_main_t * pg,
681 vlib_main_t * vm = pg->vlib_main;
682 u32 ip_offset, icmp_offset;
685 icmp_offset = g->start_byte_offset;
686 ip_offset = (g-1)->start_byte_offset;
688 while (n_packets >= 1)
692 icmp46_header_t * icmp0;
694 p0 = vlib_get_buffer (vm, packets[0]);
698 ASSERT (p0->current_data == 0);
699 ip0 = (void *) (p0->data + ip_offset);
700 icmp0 = (void *) (p0->data + icmp_offset);
702 icmp0->checksum = ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip0,
704 ASSERT (bogus_length == 0);
709 pg_edit_t type, code;
711 } pg_icmp46_header_t;
714 pg_icmp_header_init (pg_icmp46_header_t * p)
716 /* Initialize fields that are not bit fields in the IP header. */
717 #define _(f) pg_edit_init (&p->f, icmp46_header_t, f);
725 unformat_pg_icmp_header (unformat_input_t * input, va_list * args)
727 pg_stream_t * s = va_arg (*args, pg_stream_t *);
728 pg_icmp46_header_t * p;
731 p = pg_create_edit_group (s, sizeof (p[0]), sizeof (icmp46_header_t),
733 pg_icmp_header_init (p);
735 p->checksum.type = PG_EDIT_UNSPECIFIED;
740 if (! unformat (input, "ICMP %U", unformat_icmp_type_and_code, &tmp))
743 pg_edit_set_fixed (&p->type, tmp.type);
744 pg_edit_set_fixed (&p->code, tmp.code);
750 if (unformat (input, "checksum %U",
752 unformat_pg_number, &p->checksum))
755 /* Can't parse input: try next protocol level. */
760 if (! unformat_user (input, unformat_pg_payload, s))
763 if (p->checksum.type == PG_EDIT_UNSPECIFIED)
765 pg_edit_group_t * g = pg_stream_get_group (s, group_index);
766 g->edit_function = icmp6_pg_edit_function;
767 g->edit_function_opaque = 0;
773 /* Free up any edits we may have added. */
774 pg_free_edit_group (s);
778 void icmp6_register_type (vlib_main_t * vm, icmp6_type_t type, u32 node_index)
780 icmp6_main_t * im = &icmp6_main;
782 ASSERT ((int) type < ARRAY_LEN (im->input_next_index_by_type));
783 im->input_next_index_by_type[type]
784 = vlib_node_add_next (vm, ip6_icmp_input_node.index, node_index);
787 static clib_error_t *
788 icmp6_init (vlib_main_t * vm)
790 ip_main_t * im = &ip_main;
791 ip_protocol_info_t * pi;
792 icmp6_main_t * cm = &icmp6_main;
793 clib_error_t * error;
795 error = vlib_call_init_function (vm, ip_main_init);
800 pi = ip_get_protocol_info (im, IP_PROTOCOL_ICMP6);
801 pi->format_header = format_icmp6_header;
802 pi->unformat_pg_edit = unformat_pg_icmp_header;
804 cm->type_by_name = hash_create_string (0, sizeof (uword));
805 #define _(n,t) hash_set_mem (cm->type_by_name, #t, (n));
809 cm->type_and_code_by_name = hash_create_string (0, sizeof (uword));
810 #define _(a,n,t) hash_set_mem (cm->type_by_name, #t, (n) | (ICMP6_##a << 8));
814 memset (cm->input_next_index_by_type,
815 ICMP_INPUT_NEXT_DROP,
816 sizeof (cm->input_next_index_by_type));
817 memset (cm->max_valid_code_by_type, 0, sizeof (cm->max_valid_code_by_type));
819 #define _(a,n,t) cm->max_valid_code_by_type[ICMP6_##a] = clib_max (cm->max_valid_code_by_type[ICMP6_##a], n);
823 memset (cm->min_valid_hop_limit_by_type, 0, sizeof (cm->min_valid_hop_limit_by_type));
824 cm->min_valid_hop_limit_by_type[ICMP6_router_solicitation] = 255;
825 cm->min_valid_hop_limit_by_type[ICMP6_router_advertisement] = 255;
826 cm->min_valid_hop_limit_by_type[ICMP6_neighbor_solicitation] = 255;
827 cm->min_valid_hop_limit_by_type[ICMP6_neighbor_advertisement] = 255;
828 cm->min_valid_hop_limit_by_type[ICMP6_redirect] = 255;
830 memset (cm->min_valid_length_by_type, sizeof (icmp46_header_t), sizeof (cm->min_valid_length_by_type));
831 cm->min_valid_length_by_type[ICMP6_router_solicitation] = sizeof (icmp6_neighbor_discovery_header_t);
832 cm->min_valid_length_by_type[ICMP6_router_advertisement] = sizeof (icmp6_router_advertisement_header_t);
833 cm->min_valid_length_by_type[ICMP6_neighbor_solicitation]
834 = sizeof (icmp6_neighbor_solicitation_or_advertisement_header_t);
835 cm->min_valid_length_by_type[ICMP6_neighbor_advertisement]
836 = sizeof (icmp6_neighbor_solicitation_or_advertisement_header_t);
837 cm->min_valid_length_by_type[ICMP6_redirect] = sizeof (icmp6_redirect_header_t);
839 icmp6_register_type (vm, ICMP6_echo_request, ip6_icmp_echo_request_node.index);
841 return vlib_call_init_function (vm, ip6_neighbor_init);
844 VLIB_INIT_FUNCTION (icmp6_init);