diff options
Diffstat (limited to 'vnet/vnet/ip/icmp4.c')
| -rw-r--r-- | vnet/vnet/ip/icmp4.c | 734 |
1 files changed, 734 insertions, 0 deletions
diff --git a/vnet/vnet/ip/icmp4.c b/vnet/vnet/ip/icmp4.c new file mode 100644 index 00000000000..e21f3bf047b --- /dev/null +++ b/vnet/vnet/ip/icmp4.c @@ -0,0 +1,734 @@ +/* + * Copyright (c) 2015 Cisco and/or its affiliates. + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at: + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +/* + * ip/icmp4.c: ipv4 icmp + * + * Copyright (c) 2008 Eliot Dresselhaus + * + * Permission is hereby granted, free of charge, to any person obtaining + * a copy of this software and associated documentation files (the + * "Software"), to deal in the Software without restriction, including + * without limitation the rights to use, copy, modify, merge, publish, + * distribute, sublicense, and/or sell copies of the Software, and to + * permit persons to whom the Software is furnished to do so, subject to + * the following conditions: + * + * The above copyright notice and this permission notice shall be + * included in all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE + * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION + * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION + * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + */ + +#include <vlib/vlib.h> +#include <vnet/ip/ip.h> +#include <vnet/pg/pg.h> + +static u8 * format_ip4_icmp_type_and_code (u8 * s, va_list * args) +{ + icmp4_type_t type = va_arg (*args, int); + u8 code = va_arg (*args, int); + char * t = 0; + +#define _(n,f) case n: t = #f; break; + + switch (type) + { + foreach_icmp4_type; + + default: + break; + } + +#undef _ + + if (! t) + return format (s, "unknown 0x%x", type); + + s = format (s, "%s", t); + + t = 0; + switch ((type << 8) | code) + { +#define _(a,n,f) case (ICMP4_##a << 8) | (n): t = #f; break; + + foreach_icmp4_code; + +#undef _ + } + + if (t) + s = format (s, " %s", t); + + return s; +} + +static u8 * format_ip4_icmp_header (u8 * s, va_list * args) +{ + icmp46_header_t * icmp = va_arg (*args, icmp46_header_t *); + u32 max_header_bytes = va_arg (*args, u32); + + /* Nothing to do. */ + if (max_header_bytes < sizeof (icmp[0])) + return format (s, "ICMP header truncated"); + + s = format (s, "ICMP %U checksum 0x%x", + format_ip4_icmp_type_and_code, icmp->type, icmp->code, + clib_net_to_host_u16 (icmp->checksum)); + + return s; +} + +typedef struct { + u8 packet_data[64]; +} icmp_input_trace_t; + +static u8 * format_icmp_input_trace (u8 * s, va_list * va) +{ + CLIB_UNUSED (vlib_main_t * vm) = va_arg (*va, vlib_main_t *); + CLIB_UNUSED (vlib_node_t * node) = va_arg (*va, vlib_node_t *); + icmp_input_trace_t * t = va_arg (*va, icmp_input_trace_t *); + + s = format (s, "%U", + format_ip4_header, + t->packet_data, sizeof (t->packet_data)); + + return s; +} + +typedef enum { + ICMP4_ERROR_UNKNOWN_TYPE, + ICMP4_ERROR_ECHO_REPLIES_SENT, + ICMP4_ERROR_TTL_EXPIRE_RESP_SENT, + ICMP4_ERROR_TTL_EXPIRE_RESP_DROP, +} icmp_error_t; + +static char * icmp_error_strings[] = { + [ICMP4_ERROR_UNKNOWN_TYPE] = "unknown type", + [ICMP4_ERROR_ECHO_REPLIES_SENT] = "echo replies sent", + [ICMP4_ERROR_TTL_EXPIRE_RESP_SENT] = "TTL time exceeded response sent", + [ICMP4_ERROR_TTL_EXPIRE_RESP_DROP] = "TTL time exceeded response dropped", +}; + +typedef enum { + ICMP_INPUT_NEXT_ERROR, + ICMP_INPUT_N_NEXT, +} icmp_input_next_t; + +typedef struct { + uword * type_and_code_by_name; + + uword * type_by_name; + + /* Vector dispatch table indexed by [icmp type]. */ + u8 ip4_input_next_index_by_type[256]; +} icmp4_main_t; + +icmp4_main_t icmp4_main; + +static uword +ip4_icmp_input (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * frame) +{ + icmp4_main_t * im = &icmp4_main; + uword n_packets = frame->n_vectors; + u32 * from, * to_next; + u32 n_left_from, n_left_to_next, next; + + from = vlib_frame_vector_args (frame); + n_left_from = n_packets; + next = node->cached_next_index; + + if (node->flags & VLIB_NODE_FLAG_TRACE) + vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors, + /* stride */ 1, + sizeof (icmp_input_trace_t)); + + while (n_left_from > 0) + { + vlib_get_next_frame (vm, node, next, to_next, n_left_to_next); + + while (n_left_from > 0 && n_left_to_next > 0) + { + vlib_buffer_t * p0; + ip4_header_t * ip0; + icmp46_header_t * icmp0; + icmp4_type_t type0; + u32 bi0, next0; + + if (PREDICT_TRUE (n_left_from > 2)) + { + vlib_prefetch_buffer_with_index (vm, from[2], LOAD); + p0 = vlib_get_buffer (vm, from[1]); + ip0 = vlib_buffer_get_current (p0); + CLIB_PREFETCH(ip0, CLIB_CACHE_LINE_BYTES, LOAD); + } + + bi0 = to_next[0] = from[0]; + + from += 1; + n_left_from -= 1; + to_next += 1; + n_left_to_next -= 1; + + p0 = vlib_get_buffer (vm, bi0); + ip0 = vlib_buffer_get_current (p0); + icmp0 = ip4_next_header (ip0); + type0 = icmp0->type; + next0 = im->ip4_input_next_index_by_type[type0]; + + p0->error = node->errors[ICMP4_ERROR_UNKNOWN_TYPE]; + if (PREDICT_FALSE (next0 != next)) + { + vlib_put_next_frame (vm, node, next, n_left_to_next + 1); + next = next0; + vlib_get_next_frame (vm, node, next, to_next, n_left_to_next); + to_next[0] = bi0; + to_next += 1; + n_left_to_next -= 1; + } + } + + vlib_put_next_frame (vm, node, next, n_left_to_next); + } + + return frame->n_vectors; +} + +VLIB_REGISTER_NODE (ip4_icmp_input_node,static) = { + .function = ip4_icmp_input, + .name = "ip4-icmp-input", + + .vector_size = sizeof (u32), + + .format_trace = format_icmp_input_trace, + + .n_errors = ARRAY_LEN (icmp_error_strings), + .error_strings = icmp_error_strings, + + .n_next_nodes = 1, + .next_nodes = { + [ICMP_INPUT_NEXT_ERROR] = "error-punt", + }, +}; + +static uword +ip4_icmp_echo_request (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * frame) +{ + uword n_packets = frame->n_vectors; + u32 * from, * to_next; + u32 n_left_from, n_left_to_next, next; + ip4_main_t * i4m = &ip4_main; + u16 * fragment_ids, * fid; + u8 host_config_ttl = i4m->host_config.ttl; + + from = vlib_frame_vector_args (frame); + n_left_from = n_packets; + next = node->cached_next_index; + + if (node->flags & VLIB_NODE_FLAG_TRACE) + vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors, + /* stride */ 1, + sizeof (icmp_input_trace_t)); + + /* Get random fragment IDs for replies. */ + fid = fragment_ids = clib_random_buffer_get_data (&vm->random_buffer, + n_packets * sizeof (fragment_ids[0])); + + while (n_left_from > 0) + { + vlib_get_next_frame (vm, node, next, to_next, n_left_to_next); + + while (n_left_from > 2 && n_left_to_next > 2) + { + vlib_buffer_t * p0, * p1; + ip4_header_t * ip0, * ip1; + icmp46_header_t * icmp0, * icmp1; + u32 bi0, src0, dst0; + u32 bi1, src1, dst1; + ip_csum_t sum0, sum1; + + bi0 = to_next[0] = from[0]; + bi1 = to_next[1] = from[1]; + + from += 2; + n_left_from -= 2; + to_next += 2; + n_left_to_next -= 2; + + p0 = vlib_get_buffer (vm, bi0); + p1 = vlib_get_buffer (vm, bi1); + ip0 = vlib_buffer_get_current (p0); + ip1 = vlib_buffer_get_current (p1); + icmp0 = ip4_next_header (ip0); + icmp1 = ip4_next_header (ip1); + + vnet_buffer (p0)->sw_if_index[VLIB_RX] = vnet_main.local_interface_sw_if_index; + vnet_buffer (p1)->sw_if_index[VLIB_RX] = vnet_main.local_interface_sw_if_index; + + /* Update ICMP checksum. */ + sum0 = icmp0->checksum; + sum1 = icmp1->checksum; + + ASSERT (icmp0->type == ICMP4_echo_request); + ASSERT (icmp1->type == ICMP4_echo_request); + sum0 = ip_csum_update (sum0, ICMP4_echo_request, ICMP4_echo_reply, + icmp46_header_t, type); + sum1 = ip_csum_update (sum1, ICMP4_echo_request, ICMP4_echo_reply, + icmp46_header_t, type); + icmp0->type = ICMP4_echo_reply; + icmp1->type = ICMP4_echo_reply; + + icmp0->checksum = ip_csum_fold (sum0); + icmp1->checksum = ip_csum_fold (sum1); + + src0 = ip0->src_address.data_u32; + src1 = ip1->src_address.data_u32; + dst0 = ip0->dst_address.data_u32; + dst1 = ip1->dst_address.data_u32; + + /* Swap source and destination address. + Does not change checksum. */ + ip0->src_address.data_u32 = dst0; + ip1->src_address.data_u32 = dst1; + ip0->dst_address.data_u32 = src0; + ip1->dst_address.data_u32 = src1; + + /* Update IP checksum. */ + sum0 = ip0->checksum; + sum1 = ip1->checksum; + + sum0 = ip_csum_update (sum0, ip0->ttl, host_config_ttl, + ip4_header_t, ttl); + sum1 = ip_csum_update (sum1, ip1->ttl, host_config_ttl, + ip4_header_t, ttl); + ip0->ttl = host_config_ttl; + ip1->ttl = host_config_ttl; + + /* New fragment id. */ + sum0 = ip_csum_update (sum0, ip0->fragment_id, fid[0], + ip4_header_t, fragment_id); + sum1 = ip_csum_update (sum1, ip1->fragment_id, fid[1], + ip4_header_t, fragment_id); + ip0->fragment_id = fid[0]; + ip1->fragment_id = fid[1]; + fid += 2; + + ip0->checksum = ip_csum_fold (sum0); + ip1->checksum = ip_csum_fold (sum1); + + ASSERT (ip0->checksum == ip4_header_checksum (ip0)); + ASSERT (ip1->checksum == ip4_header_checksum (ip1)); + } + + while (n_left_from > 0 && n_left_to_next > 0) + { + vlib_buffer_t * p0; + ip4_header_t * ip0; + icmp46_header_t * icmp0; + u32 bi0, src0, dst0; + ip_csum_t sum0; + + bi0 = to_next[0] = from[0]; + + from += 1; + n_left_from -= 1; + to_next += 1; + n_left_to_next -= 1; + + p0 = vlib_get_buffer (vm, bi0); + ip0 = vlib_buffer_get_current (p0); + icmp0 = ip4_next_header (ip0); + + vnet_buffer (p0)->sw_if_index[VLIB_RX] = vnet_main.local_interface_sw_if_index; + + /* Update ICMP checksum. */ + sum0 = icmp0->checksum; + + ASSERT (icmp0->type == ICMP4_echo_request); + sum0 = ip_csum_update (sum0, ICMP4_echo_request, ICMP4_echo_reply, + icmp46_header_t, type); + icmp0->type = ICMP4_echo_reply; + icmp0->checksum = ip_csum_fold (sum0); + + src0 = ip0->src_address.data_u32; + dst0 = ip0->dst_address.data_u32; + ip0->src_address.data_u32 = dst0; + ip0->dst_address.data_u32 = src0; + + /* Update IP checksum. */ + sum0 = ip0->checksum; + + sum0 = ip_csum_update (sum0, ip0->ttl, host_config_ttl, + ip4_header_t, ttl); + ip0->ttl = host_config_ttl; + + sum0 = ip_csum_update (sum0, ip0->fragment_id, fid[0], + ip4_header_t, fragment_id); + ip0->fragment_id = fid[0]; + fid += 1; + + ip0->checksum = ip_csum_fold (sum0); + + ASSERT (ip0->checksum == ip4_header_checksum (ip0)); + } + + vlib_put_next_frame (vm, node, next, n_left_to_next); + } + + vlib_error_count (vm, ip4_icmp_input_node.index, + ICMP4_ERROR_ECHO_REPLIES_SENT, + frame->n_vectors); + + return frame->n_vectors; +} + +VLIB_REGISTER_NODE (ip4_icmp_echo_request_node,static) = { + .function = ip4_icmp_echo_request, + .name = "ip4-icmp-echo-request", + + .vector_size = sizeof (u32), + + .format_trace = format_icmp_input_trace, + + .n_next_nodes = 1, + .next_nodes = { + [0] = "ip4-rewrite-local", + }, +}; + +typedef enum { + ICMP4_TTL_EXPIRE_NEXT_DROP, + ICMP4_TTL_EXPIRE_NEXT_LOOKUP, + ICMP4_TTL_EXPIRE_N_NEXT, +} icmp_ttl_expire_next_t; + +static uword +ip4_icmp_ttl_expire (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * frame) +{ + u32 * from, * to_next; + uword n_left_from, n_left_to_next; + icmp_ttl_expire_next_t next_index; + ip4_main_t *im = &ip4_main; + ip_lookup_main_t * lm = &im->lookup_main; + + from = vlib_frame_vector_args(frame); + n_left_from = frame->n_vectors; + next_index = node->cached_next_index; + + if (node->flags & VLIB_NODE_FLAG_TRACE) + vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors, + /* stride */ 1, sizeof (icmp_input_trace_t)); + + while (n_left_from > 0) + { + vlib_get_next_frame(vm, node, next_index, to_next, n_left_to_next); + + while (n_left_from > 0 && n_left_to_next > 0) + { + u32 pi0 = from[0]; + u32 next0 = ICMP4_TTL_EXPIRE_NEXT_LOOKUP; + u8 error0 = ICMP4_ERROR_TTL_EXPIRE_RESP_SENT; + u32 len0, new_len0; + vlib_buffer_t * p0; + ip4_header_t * ip0, * out_ip0; + icmp46_header_t * icmp0; + ip_csum_t sum; + u32 sw_if_index0, if_add_index0; + + /* Speculatively enqueue p0 to the current next frame */ + to_next[0] = pi0; + from += 1; + to_next += 1; + n_left_from -= 1; + n_left_to_next -= 1; + + p0 = vlib_get_buffer(vm, pi0); + ip0 = vlib_buffer_get_current(p0); + len0 = vlib_buffer_length_in_chain (vm, p0); + sw_if_index0 = vnet_buffer(p0)->sw_if_index[VLIB_RX]; + + /* Cut payload to just IP header plus first 8 bytes */ + new_len0 = (ip0->ip_version_and_header_length &0xf)*4 + 8; + if (len0 > new_len0) + { + p0->current_length = new_len0; /* should fit in 1st buffer */ + if (PREDICT_FALSE(p0->total_length_not_including_first_buffer)) + { /* clear current_length of all other buffers in chain */ + vlib_buffer_t *b = p0; + p0->total_length_not_including_first_buffer = 0; + while (b->flags & VLIB_BUFFER_NEXT_PRESENT) + { + b = vlib_get_buffer (vm, b->next_buffer); + b->current_length = 0; + } + } + } + + /* Add IP header and ICMP header including a 4 byte unused field */ + vlib_buffer_advance(p0, + -sizeof(ip4_header_t)-sizeof(icmp46_header_t)-4); + out_ip0 = vlib_buffer_get_current(p0); + icmp0 = (icmp46_header_t *) &out_ip0[1]; + + /* Fill ip header fields */ + out_ip0->ip_version_and_header_length = 0x45; + out_ip0->tos = 0; + out_ip0->length = clib_host_to_net_u16(p0->current_length); + out_ip0->fragment_id = 0; + out_ip0->ttl = 0xff; + out_ip0->protocol = IP_PROTOCOL_ICMP; + out_ip0->dst_address = ip0->src_address; + if_add_index0 = + lm->if_address_pool_index_by_sw_if_index[sw_if_index0]; + if (PREDICT_TRUE(if_add_index0 != ~0)) + { + ip_interface_address_t *if_add = + pool_elt_at_index(lm->if_address_pool, if_add_index0); + ip4_address_t *if_ip = + ip_interface_address_get_address(lm, if_add); + out_ip0->src_address = *if_ip; + vlib_error_count (vm, node->node_index, error0, 1); + } + else /* interface has no IP4 address - should not happen */ + { + next0 = ICMP4_TTL_EXPIRE_NEXT_DROP; + error0 = ICMP4_ERROR_TTL_EXPIRE_RESP_DROP; + } + out_ip0->checksum = ip4_header_checksum(out_ip0); + + /* Fill icmp header fields */ + icmp0->type = ICMP4_time_exceeded; + icmp0->code = ICMP4_time_exceeded_ttl_exceeded_in_transit; + icmp0->checksum = 0; + sum = ip_incremental_checksum( + 0, icmp0, p0->current_length - sizeof(ip4_header_t)); + icmp0->checksum = ~ip_csum_fold(sum); + + /* Update error status */ + p0->error = node->errors[error0]; + + /* Verify speculative enqueue, maybe switch current next frame */ + vlib_validate_buffer_enqueue_x1(vm, node, next_index, + to_next, n_left_to_next, + pi0, next0); + } + vlib_put_next_frame(vm, node, next_index, n_left_to_next); + } + + return frame->n_vectors; +} + +VLIB_REGISTER_NODE (ip4_icmp_ttl_expire_node) = { + .function = ip4_icmp_ttl_expire, + .name = "ip4-icmp-ttl-expire", + .vector_size = sizeof (u32), + + .n_errors = ARRAY_LEN (icmp_error_strings), + .error_strings = icmp_error_strings, + + .n_next_nodes = ICMP4_TTL_EXPIRE_N_NEXT, + .next_nodes = { + [ICMP4_TTL_EXPIRE_NEXT_DROP] = "error-drop", + [ICMP4_TTL_EXPIRE_NEXT_LOOKUP] = "ip4-lookup", + }, + + .format_trace = format_icmp_input_trace, +}; + + +static uword unformat_icmp_type_and_code (unformat_input_t * input, va_list * args) +{ + icmp46_header_t * h = va_arg (*args, icmp46_header_t *); + icmp4_main_t * cm = &icmp4_main; + u32 i; + + if (unformat_user (input, unformat_vlib_number_by_name, + cm->type_and_code_by_name, &i)) + { + h->type = (i >> 8) & 0xff; + h->code = (i >> 0) & 0xff; + } + else if (unformat_user (input, unformat_vlib_number_by_name, + cm->type_by_name, &i)) + { + h->type = i; + h->code = 0; + } + else + return 0; + + return 1; +} + +static void +icmp4_pg_edit_function (pg_main_t * pg, + pg_stream_t * s, + pg_edit_group_t * g, + u32 * packets, + u32 n_packets) +{ + vlib_main_t * vm = pg->vlib_main; + u32 ip_offset, icmp_offset; + + icmp_offset = g->start_byte_offset; + ip_offset = (g-1)->start_byte_offset; + + while (n_packets >= 1) + { + vlib_buffer_t * p0; + ip4_header_t * ip0; + icmp46_header_t * icmp0; + u32 len0; + + p0 = vlib_get_buffer (vm, packets[0]); + n_packets -= 1; + packets += 1; + + ASSERT (p0->current_data == 0); + ip0 = (void *) (p0->data + ip_offset); + icmp0 = (void *) (p0->data + icmp_offset); + len0 = clib_net_to_host_u16 (ip0->length) - ip4_header_bytes (ip0); + icmp0->checksum = ~ ip_csum_fold (ip_incremental_checksum (0, icmp0, len0)); + } +} + +typedef struct { + pg_edit_t type, code; + pg_edit_t checksum; +} pg_icmp46_header_t; + +always_inline void +pg_icmp_header_init (pg_icmp46_header_t * p) +{ + /* Initialize fields that are not bit fields in the IP header. */ +#define _(f) pg_edit_init (&p->f, icmp46_header_t, f); + _ (type); + _ (code); + _ (checksum); +#undef _ +} + +static uword +unformat_pg_icmp_header (unformat_input_t * input, va_list * args) +{ + pg_stream_t * s = va_arg (*args, pg_stream_t *); + pg_icmp46_header_t * p; + u32 group_index; + + p = pg_create_edit_group (s, sizeof (p[0]), sizeof (icmp46_header_t), + &group_index); + pg_icmp_header_init (p); + + p->checksum.type = PG_EDIT_UNSPECIFIED; + + { + icmp46_header_t tmp; + + if (! unformat (input, "ICMP %U", unformat_icmp_type_and_code, &tmp)) + goto error; + + pg_edit_set_fixed (&p->type, tmp.type); + pg_edit_set_fixed (&p->code, tmp.code); + } + + /* Parse options. */ + while (1) + { + if (unformat (input, "checksum %U", + unformat_pg_edit, + unformat_pg_number, &p->checksum)) + ; + + /* Can't parse input: try next protocol level. */ + else + break; + } + + if (! unformat_user (input, unformat_pg_payload, s)) + goto error; + + if (p->checksum.type == PG_EDIT_UNSPECIFIED) + { + pg_edit_group_t * g = pg_stream_get_group (s, group_index); + g->edit_function = icmp4_pg_edit_function; + g->edit_function_opaque = 0; + } + + return 1; + + error: + /* Free up any edits we may have added. */ + pg_free_edit_group (s); + return 0; +} + +void ip4_icmp_register_type (vlib_main_t * vm, icmp4_type_t type, + u32 node_index) +{ + icmp4_main_t * im = &icmp4_main; + + ASSERT (type < ARRAY_LEN (im->ip4_input_next_index_by_type)); + im->ip4_input_next_index_by_type[type] + = vlib_node_add_next (vm, ip4_icmp_input_node.index, node_index); +} + +static clib_error_t * +icmp4_init (vlib_main_t * vm) +{ + ip_main_t * im = &ip_main; + ip_protocol_info_t * pi; + icmp4_main_t * cm = &icmp4_main; + clib_error_t * error; + + error = vlib_call_init_function (vm, ip_main_init); + + if (error) + return error; + + pi = ip_get_protocol_info (im, IP_PROTOCOL_ICMP); + pi->format_header = format_ip4_icmp_header; + pi->unformat_pg_edit = unformat_pg_icmp_header; + + cm->type_by_name = hash_create_string (0, sizeof (uword)); +#define _(n,t) hash_set_mem (cm->type_by_name, #t, (n)); + foreach_icmp4_type; +#undef _ + + cm->type_and_code_by_name = hash_create_string (0, sizeof (uword)); +#define _(a,n,t) hash_set_mem (cm->type_by_name, #t, (n) | (ICMP4_##a << 8)); + foreach_icmp4_code; +#undef _ + + memset (cm->ip4_input_next_index_by_type, + ICMP_INPUT_NEXT_ERROR, + sizeof (cm->ip4_input_next_index_by_type)); + + ip4_icmp_register_type (vm, ICMP4_echo_request, ip4_icmp_echo_request_node.index); + + return 0; +} + +VLIB_INIT_FUNCTION (icmp4_init); |