pdns/fuzz_packetcache.cc

   1 /*
   2  * This file is part of PowerDNS or dnsdist.
   3  * Copyright -- PowerDNS.COM B.V. and its contributors
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of version 2 of the GNU General Public License as
   7  * published by the Free Software Foundation.
   8  *
   9  * In addition, for the avoidance of any doubt, permission is granted to
  10  * link this program with OpenSSL and to (re)distribute the binaries
  11  * produced as the result of such linking.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  21  */
  22
  23 #include "packetcache.hh"
  24 #include "statbag.hh"
  25
  26 StatBag S;
  27
  28 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size);
  29
  30 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
  31 {
  32
  33   if (size > std::numeric_limits<uint16_t>::max() || size < sizeof(dnsheader)) {
  34     return 0;
  35   }
  36
  37   std::string input(reinterpret_cast<const char*>(data), size);
  38
  39   /* auth's version */
  40   try {
  41     static const std::unordered_set<uint16_t> optionsToIgnore{EDNSOptionCode::COOKIE};
  42
  43     PacketCache::canHashPacket(input, optionsToIgnore);
  44     DNSName qname(input.data(), input.size(), sizeof(dnsheader), false);
  45     PacketCache::queryMatches(input, input, qname, optionsToIgnore);
  46   }
  47   catch (const std::exception& e) {
  48   }
  49   catch (const PDNSException& e) {
  50   }
  51
  52   /* recursor's version */
  53   try {
  54     static const std::unordered_set<uint16_t> optionsToIgnore{EDNSOptionCode::COOKIE, EDNSOptionCode::ECS};
  55
  56     PacketCache::canHashPacket(input, optionsToIgnore);
  57     DNSName qname(input.data(), input.size(), sizeof(dnsheader), false);
  58     PacketCache::queryMatches(input, input, qname, optionsToIgnore);
  59   }
  60   catch (const std::exception& e) {
  61   }
  62   catch (const PDNSException& e) {
  63   }
  64
  65   return 0;
  66 }