59 lines
1.8 KiB
C++
59 lines
1.8 KiB
C++
// Copyright 2021 The Chromium Authors
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef NET_DNS_DNS_CONFIG_SERVICE_ANDROID_H_
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#define NET_DNS_DNS_CONFIG_SERVICE_ANDROID_H_
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#include <memory>
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#include "base/time/time.h"
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#include "net/android/network_library.h"
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#include "net/base/net_export.h"
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#include "net/dns/dns_config_service.h"
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namespace net {
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// Use DnsConfigService::CreateSystemService to use it outside of tests.
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namespace internal {
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// Service for reading and watching Android system DNS settings. This object is
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// not thread-safe and methods may perform blocking I/O so methods must be
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// called on a sequence that allows blocking (i.e. base::MayBlock). It may be
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// constructed on a different sequence than which it's later called on.
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class NET_EXPORT_PRIVATE DnsConfigServiceAndroid : public DnsConfigService {
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public:
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static constexpr base::TimeDelta kConfigChangeDelay = base::Milliseconds(50);
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DnsConfigServiceAndroid();
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~DnsConfigServiceAndroid() override;
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DnsConfigServiceAndroid(const DnsConfigServiceAndroid&) = delete;
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DnsConfigServiceAndroid& operator=(const DnsConfigServiceAndroid&) = delete;
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// To be effective, must be called before the first config read. Also, may
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// outlive `this` and be run on other sequences.
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void set_dns_server_getter_for_testing(
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android::DnsServerGetter dns_server_getter) {
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dns_server_getter_ = std::move(dns_server_getter);
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}
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protected:
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// DnsConfigService:
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void ReadConfigNow() override;
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bool StartWatching() override;
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private:
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class Watcher;
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class ConfigReader;
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std::unique_ptr<Watcher> watcher_;
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std::unique_ptr<ConfigReader> config_reader_;
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android::DnsServerGetter dns_server_getter_;
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};
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} // namespace internal
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} // namespace net
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#endif // NET_DNS_DNS_CONFIG_SERVICE_ANDROID_H_
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