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- // Copyright 2021 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_ANDROID_H_
- #define NET_DNS_DNS_CONFIG_SERVICE_ANDROID_H_
- #include <memory>
- #include "base/time/time.h"
- #include "net/android/network_library.h"
- #include "net/base/net_export.h"
- #include "net/dns/dns_config_service.h"
- namespace net {
- // Use DnsConfigService::CreateSystemService to use it outside of tests.
- namespace internal {
- // Service for reading and watching Android system 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.
- class NET_EXPORT_PRIVATE DnsConfigServiceAndroid : public DnsConfigService {
- public:
- static constexpr base::TimeDelta kConfigChangeDelay = base::Milliseconds(50);
- DnsConfigServiceAndroid();
- ~DnsConfigServiceAndroid() override;
- DnsConfigServiceAndroid(const DnsConfigServiceAndroid&) = delete;
- DnsConfigServiceAndroid& operator=(const DnsConfigServiceAndroid&) = delete;
- // To be effective, must be called before the first config read. Also, may
- // outlive `this` and be run on other sequences.
- void set_dns_server_getter_for_testing(
- android::DnsServerGetter dns_server_getter) {
- dns_server_getter_ = std::move(dns_server_getter);
- }
- protected:
- // DnsConfigService:
- void ReadConfigNow() override;
- bool StartWatching() override;
- private:
- class Watcher;
- class ConfigReader;
- std::unique_ptr<Watcher> watcher_;
- std::unique_ptr<ConfigReader> config_reader_;
- android::DnsServerGetter dns_server_getter_;
- };
- } // namespace internal
- } // namespace net
- #endif // NET_DNS_DNS_CONFIG_SERVICE_ANDROID_H_
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