net/base/parse_url_hostname_to_address_fuzzer.cc

// Copyright 2016 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include <stddef.h>
#include <stdint.h>

#include <functional>

#include "net/base/address_list.h"
#include "net/base/ip_address.h"

// Entry point for LibFuzzer.
extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
  const base::StringPiece hostname(reinterpret_cast<const char*>(data), size);
  net::IPAddress address;

  if (net::ParseURLHostnameToAddress(hostname, &address)) {
    // To fuzz port number without spending raw bytes of data, use hash(data).
    std::size_t data_hash = std::hash<std::string>()(hostname.as_string());
    uint16_t port = static_cast<uint16_t>(data_hash & 0xFFFF);
    net::AddressList addresses =
        net::AddressList::CreateFromIPAddress(address, port);

    for (const auto& endpoint : addresses) {
      endpoint.ToString();
    }
  }

  return 0;
}