1 files changed, 76 insertions, 0 deletions
diff --git a/fuzz/fuzz.cc b/fuzz/fuzz.cc
new file mode 100644
index 0000000000..f77354f44e
--- /dev/null
+++ b/fuzz/fuzz.cc
@@ -0,0 +1,76 @@
+// Copyright (C) 2024 Internet Systems Consortium, Inc. ("ISC")
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+#include <config.h>
+
+#include <fuzz.h>
+
+#include <log/logger_support.h>
+#include <process/daemon.h>
+#include <util/filesystem.h>
+#include <util/encode/encode.h>
+
+#include <cassert>
+#include <string>
+
+using namespace isc::process;
+using namespace isc::util::encode;
+using namespace isc::util::file;
+using namespace std;
+
+extern "C" {
+
+string KEA_LFC = isFile(KEA_LFC_INSTALLATION) ? KEA_LFC_INSTALLATION : KEA_LFC_SOURCES;
+// string KEA_FUZZ_DIR = isFile(KEA_FUZZ_DIR_INSTALLATION) ? KEA_FUZZ_DIR_INSTALLATION : KEA_FUZZ_DIR_SOURCES;
+TemporaryDirectory TEMP_DIR = TemporaryDirectory();
+string KEA_FUZZ_DIR = TEMP_DIR.dirName();
+
+bool
+DoInitialization() {
+    LLVMFuzzerTearDown();
+
+    // Spoof the logger just enough to not get LoggingNotInitialized thrown.
+    // We explicitly don't want any logging during fuzzing for performance reasons.
+    setenv("KEA_LOCKFILE_DIR", KEA_FUZZ_DIR.c_str(), 0);
+    setenv("KEA_LFC_EXECUTABLE", "/bin/true", 0);
+    if (!getenv("DEBUG")) {
+        setenv("KEA_LOGGER_DESTINATION", "/dev/null", 0);
+    }
+    setenv("KEA_PIDFILE_DIR", KEA_FUZZ_DIR.c_str(), 0);
+    if (!isc::log::isLoggingInitialized()) {
+        isc::log::initLogger("fuzzer");
+        Daemon::loggerInit("fuzzer", /* verbose = */ false);
+        Daemon::setDefaultLoggerName("fuzzer");
+    }
+
+    return true;
+}
+
+void writeToFile(string const& file, string const& content) {
+    // Create the config file.
+    ofstream out(file, ios::out | ios::trunc);
+    assert(out.is_open());
+    out << content;
+    out.close();
+    assert(!out.is_open());
+}
+
+bool byteStreamToPacketData(uint8_t const* data, size_t size, vector<uint8_t>& byte_stream) {
+    string str(data, data + size);
+    if (!str.empty() && str.at(str.size() - 1) == '\n') {
+        str = str.substr(0, str.size() - 1);
+    }
+    if (str.find_first_not_of("0123456789abcdefABCDEF") != string::npos) {
+        return false;
+    }
+    if (str.size() % 2) {
+        return false;
+    }
+    decodeHex(str, byte_stream);
+    return true;
+}
+
+}  // extern "C"