/* MIT License * * Copyright (c) The c-ares project and its contributors * * 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 (including the next * paragraph) 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. * * SPDX-License-Identifier: MIT */ #include #include #include #include "ares.h" /* Include ares internal file for DNS protocol constants */ #include "ares_nameser.h" int LLVMFuzzerTestOneInput(const unsigned char *data, unsigned long size); /* Fuzzing on a query name isn't very useful as its already fuzzed as part * of the normal fuzzing operations. So we'll disable this by default and * instead use this same fuzzer to validate our URI scheme parsers accessed * via ares_set_servers_csv() */ #ifdef USE_LEGACY_FUZZERS /* Entrypoint for Clang's libfuzzer, exercising query creation. */ int LLVMFuzzerTestOneInput(const unsigned char *data, unsigned long size) { /* Null terminate the data. */ char *name = malloc(size + 1); unsigned char *buf = NULL; int buflen = 0; name[size] = '\0'; memcpy(name, data, size); ares_create_query(name, C_IN, T_AAAA, 1234, 0, &buf, &buflen, 1024); free(buf); free(name); return 0; } #else int LLVMFuzzerTestOneInput(const unsigned char *data, unsigned long size) { ares_channel_t *channel = NULL; char *csv; ares_library_init(ARES_LIB_INIT_ALL); ares_init(&channel); /* Need to null-term data */ csv = malloc(size + 1); memcpy(csv, data, size); csv[size] = '\0'; ares_set_servers_csv(channel, csv); free(csv); ares_destroy(channel); ares_library_cleanup(); return 0; } #endif