1 // Copyright 2016 The Chromium Authors 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #include <stddef.h> 6 #include <stdint.h> 7 8 #include <functional> 9 #include <string_view> 10 11 #include "net/base/address_list.h" 12 #include "net/base/ip_address.h" 13 14 // Entry point for LibFuzzer. LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)15extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) { 16 const std::string_view hostname(reinterpret_cast<const char*>(data), size); 17 net::IPAddress address; 18 19 if (net::ParseURLHostnameToAddress(hostname, &address)) { 20 // To fuzz port number without spending raw bytes of data, use hash(data). 21 std::size_t data_hash = std::hash<std::string>()(std::string(hostname)); 22 uint16_t port = static_cast<uint16_t>(data_hash & 0xFFFF); 23 net::AddressList addresses = 24 net::AddressList::CreateFromIPAddress(address, port); 25 26 for (const auto& endpoint : addresses) { 27 endpoint.ToString(); 28 } 29 } 30 31 return 0; 32 } 33