1 files changed, 61 insertions, 0 deletions
diff --git a/fuzz_dnsdistcache.cc b/fuzz_dnsdistcache.cc
new file mode 100644
index 0000000..6c10920
--- /dev/null
+++ b/fuzz_dnsdistcache.cc
@@ -0,0 +1,61 @@
+/*
+ * This file is part of PowerDNS or dnsdist.
+ * Copyright -- PowerDNS.COM B.V. and its contributors
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * In addition, for the avoidance of any doubt, permission is granted to
+ * link this program with OpenSSL and to (re)distribute the binaries
+ * produced as the result of such linking.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "dnsdist-cache.hh"
+
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size);
+
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
+{
+
+  if (size > std::numeric_limits<uint16_t>::max()) {
+    return 0;
+  }
+
+  /* dnsdist's version */
+  DNSDistPacketCache pcSkipCookies(10000);
+  // By default, cookies are not hashed
+  pcSkipCookies.setECSParsingEnabled(true);
+
+  DNSDistPacketCache pcHashCookies(10000);
+  pcHashCookies.setECSParsingEnabled(true);
+  // Do not skip cookies
+  pcHashCookies.setSkippedOptions({});
+
+  try {
+    uint16_t qtype;
+    uint16_t qclass;
+    unsigned int consumed;
+    PacketBuffer vect(data, data + size);
+    const DNSName qname(reinterpret_cast<const char*>(data), size, sizeof(dnsheader), false, &qtype, &qclass, &consumed);
+    pcSkipCookies.getKey(qname.getStorage(), consumed, vect, false);
+    pcHashCookies.getKey(qname.getStorage(), consumed, vect, false);
+    boost::optional<Netmask> subnet;
+    DNSDistPacketCache::getClientSubnet(vect, consumed, subnet);
+  }
+  catch (const std::exception& e) {
+  }
+  catch (const PDNSException& e) {
+  }
+
+  return 0;
+}