c-ares/test/ares-test-fuzz.c

/*
 * Copyright (C) The c-ares project
 *
 * Permission to use, copy, modify, and distribute this
 * software and its documentation for any purpose and without
 * fee is hereby granted, provided that the above copyright
 * notice appear in all copies and that both that copyright
 * notice and this permission notice appear in supporting
 * documentation, and that the name of M.I.T. not be used in
 * advertising or publicity pertaining to distribution of the
 * software without specific, written prior permission.
 * M.I.T. makes no representations about the suitability of
 * this software for any purpose.  It is provided "as is"
 * without express or implied warranty.
 *
 * SPDX-License-Identifier: MIT
 */
#include <stddef.h>

#include "ares.h"

int LLVMFuzzerTestOneInput(const unsigned char *data, unsigned long size);


// Entrypoint for Clang's libfuzzer
int LLVMFuzzerTestOneInput(const unsigned char *data, unsigned long size)
{
  // Feed the data into each of the ares_parse_*_reply functions.
  struct hostent *host = NULL;
  struct ares_addrttl info[5];
  struct ares_addr6ttl info6[5];
  unsigned char addrv4[4] = {0x10, 0x20, 0x30, 0x40};
  struct ares_srv_reply* srv = NULL;
  struct ares_mx_reply* mx = NULL;
  struct ares_txt_reply* txt = NULL;
  struct ares_soa_reply* soa = NULL;
  struct ares_naptr_reply* naptr = NULL;
  struct ares_caa_reply* caa = NULL;
  struct ares_uri_reply* uri = NULL;
  int count = 5;
  ares_parse_a_reply(data, (int)size, &host, info, &count);
  if (host) ares_free_hostent(host);

  host = NULL;
  count = 5;
  ares_parse_aaaa_reply(data, (int)size, &host, info6, &count);
  if (host) ares_free_hostent(host);

  host = NULL;
  ares_parse_ptr_reply(data, (int)size, addrv4, sizeof(addrv4), AF_INET, &host);
  if (host) ares_free_hostent(host);

  host = NULL;
  ares_parse_ns_reply(data, (int)size, &host);
  if (host) ares_free_hostent(host);

  ares_parse_srv_reply(data, (int)size, &srv);
  if (srv) ares_free_data(srv);

  ares_parse_mx_reply(data, (int)size, &mx);
  if (mx) ares_free_data(mx);

  ares_parse_txt_reply(data, (int)size, &txt);
  if (txt) ares_free_data(txt);

  ares_parse_soa_reply(data, (int)size, &soa);
  if (soa) ares_free_data(soa);

  ares_parse_naptr_reply(data, (int)size, &naptr);
  if (naptr) ares_free_data(naptr);

  ares_parse_caa_reply(data, (int)size, &caa);
  if (caa) ares_free_data(caa);

  ares_parse_uri_reply(data, (int)size, &uri);
  if (uri) ares_free_data(uri);

  return 0;
}