ares-test-fuzz.c

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#include <stddef.h>
 
#include "ares.h"
 
// 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];
  int count = 5;
  ares_parse_a_reply(data, size, &host, info, &count);
  if (host) ares_free_hostent(host);
 
  host = NULL;
  struct ares_addr6ttl info6[5];
  count = 5;
  ares_parse_aaaa_reply(data, size, &host, info6, &count);
  if (host) ares_free_hostent(host);
 
  host = NULL;
  unsigned char addrv4[4] = {0x10, 0x20, 0x30, 0x40};
  ares_parse_ptr_reply(data, size, addrv4, sizeof(addrv4), AF_INET, &host);
  if (host) ares_free_hostent(host);
 
  host = NULL;
  ares_parse_ns_reply(data, size, &host);
  if (host) ares_free_hostent(host);
 
  struct ares_srv_reply* srv = NULL;
  ares_parse_srv_reply(data, size, &srv);
  if (srv) ares_free_data(srv);
 
  struct ares_mx_reply* mx = NULL;
  ares_parse_mx_reply(data, size, &mx);
  if (mx) ares_free_data(mx);
 
  struct ares_txt_reply* txt = NULL;
  ares_parse_txt_reply(data, size, &txt);
  if (txt) ares_free_data(txt);
 
  struct ares_soa_reply* soa = NULL;
  ares_parse_soa_reply(data, size, &soa);
  if (soa) ares_free_data(soa);
 
  struct ares_naptr_reply* naptr = NULL;
  ares_parse_naptr_reply(data, size, &naptr);
  if (naptr) ares_free_data(naptr);
 
  struct ares_caa_reply* caa = NULL;
  ares_parse_caa_reply(data, size, &caa);
  if (caa) ares_free_data(caa);
 
  return 0;
}