pdns/dnsdistdist/fuzz_dnsdistcache.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 "dnsdist-cache.hh"
  24
  25 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size);
  26
  27 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
  28 {
  29
  30   if (size > std::numeric_limits<uint16_t>::max()) {
  31     return 0;
  32   }
  33
  34   /* dnsdist's version */
  35   DNSDistPacketCache pcSkipCookies(10000);
  36   // By default, cookies are not hashed
  37   pcSkipCookies.setECSParsingEnabled(true);
  38
  39   DNSDistPacketCache pcHashCookies(10000);
  40   pcHashCookies.setECSParsingEnabled(true);
  41   // Do not skip cookies
  42   pcHashCookies.setSkippedOptions({});
  43
  44   try {
  45     uint16_t qtype;
  46     uint16_t qclass;
  47     unsigned int consumed;
  48     PacketBuffer vect(data, data + size);
  49     const DNSName qname(reinterpret_cast<const char*>(data), size, sizeof(dnsheader), false, &qtype, &qclass, &consumed);
  50     pcSkipCookies.getKey(qname.getStorage(), consumed, vect, false);
  51     pcHashCookies.getKey(qname.getStorage(), consumed, vect, false);
  52     boost::optional<Netmask> subnet;
  53     DNSDistPacketCache::getClientSubnet(vect, consumed, subnet);
  54   }
  55   catch (const std::exception& e) {
  56   }
  57   catch (const PDNSException& e) {
  58   }
  59
  60   return 0;
  61 }