/* * 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 #include #include static char *icmp_error_strings[] = { #define _(f,s) s, foreach_icmp4_error #undef _ }; 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; } 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 { 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]; /* Verify speculative enqueue, maybe switch current next frame */ vlib_validate_buffer_enqueue_x1 (vm, node, next, to_next, n_left_to_next, bi0, next0); } vlib_put_next_frame (vm, node, next, n_left_to_next); } return frame->n_vectors; } /* *INDENT-OFF* */ VLIB_REGISTER_NODE (ip4_icmp_input_node) = { .function = ip4_icmp_input, .name = "ip4-icmp-i
# Copyright (c) 2016 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.

# Shared suffix rules
# Please do not set "SUFFIXES = .api.h .api" here

%.api.h: %.api