blob: 9cdf4bc04a55a1c01676d36cded00eb9f93160e9 [file] [log] [blame]
// Copyright (c) 2012 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.
#ifndef NET_DNS_DNS_CONFIG_SERVICE_POSIX_H_
#define NET_DNS_DNS_CONFIG_SERVICE_POSIX_H_
#include <memory>
#if !defined(OS_ANDROID)
#include <sys/types.h>
#include <netinet/in.h>
#include <resolv.h>
#endif
#include "base/compiler_specific.h"
#include "base/gtest_prod_util.h"
#include "base/macros.h"
#include "base/optional.h"
#include "net/base/net_export.h"
#include "net/dns/dns_config_service.h"
namespace net {
struct DnsConfig;
// Use DnsConfigService::CreateSystemService to use it outside of tests.
namespace internal {
// Service for reading and watching POSIX system (except Android) DNS settings.
// This object is not thread-safe and methods may perform blocking I/O so
// methods must be called on a sequence that allows blocking (i.e.
// base::MayBlock). It may be constructed on a different sequence than which
// it's later called on. WatchConfig() must be called prior to ReadConfig().
class NET_EXPORT_PRIVATE DnsConfigServicePosix : public DnsConfigService {
public:
DnsConfigServicePosix();
~DnsConfigServicePosix() override;
void RefreshConfig() override;
protected:
// DnsConfigService:
void ReadConfigNow() override;
bool StartWatching() override;
// Create |config_reader_|.
void CreateReader();
private:
FRIEND_TEST_ALL_PREFIXES(DnsConfigServicePosixTest,
ChangeConfigMultipleTimes);
class Watcher;
class ConfigReader;
std::unique_ptr<Watcher> watcher_;
scoped_refptr<ConfigReader> config_reader_;
DISALLOW_COPY_AND_ASSIGN(DnsConfigServicePosix);
};
#if !defined(OS_ANDROID)
// Returns nullopt iff a valid config could not be determined.
base::Optional<DnsConfig> NET_EXPORT_PRIVATE
ConvertResStateToDnsConfig(const struct __res_state& res);
#endif
} // namespace internal
} // namespace net
#endif // NET_DNS_DNS_CONFIG_SERVICE_POSIX_H_