114 lines
3.3 KiB
C++
114 lines
3.3 KiB
C++
// Copyright 2015 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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#include "net/tools/quic/synchronous_host_resolver.h"
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#include <memory>
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#include <utility>
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#include "base/at_exit.h"
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#include "base/functional/bind.h"
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#include "base/location.h"
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#include "base/memory/weak_ptr.h"
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#include "base/message_loop/message_pump_type.h"
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#include "base/run_loop.h"
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#include "base/task/single_thread_task_executor.h"
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#include "base/task/single_thread_task_runner.h"
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#include "base/threading/simple_thread.h"
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#include "net/base/host_port_pair.h"
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#include "net/base/net_errors.h"
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#include "net/base/network_isolation_key.h"
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#include "net/dns/host_resolver.h"
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#include "net/log/net_log.h"
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#include "net/log/net_log_with_source.h"
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#include "third_party/abseil-cpp/absl/types/optional.h"
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#include "url/scheme_host_port.h"
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namespace net {
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namespace {
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class ResolverThread : public base::SimpleThread {
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public:
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ResolverThread();
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ResolverThread(const ResolverThread&) = delete;
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ResolverThread& operator=(const ResolverThread&) = delete;
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~ResolverThread() override;
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// Called on the main thread.
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int Resolve(url::SchemeHostPort scheme_host_port, AddressList* addresses);
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// SimpleThread methods:
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void Run() override;
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private:
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void OnResolutionComplete(base::OnceClosure on_done, int rv);
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AddressList* addresses_;
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url::SchemeHostPort scheme_host_port_;
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int rv_ = ERR_UNEXPECTED;
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};
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ResolverThread::ResolverThread() : SimpleThread("resolver_thread") {}
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ResolverThread::~ResolverThread() = default;
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void ResolverThread::Run() {
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base::SingleThreadTaskExecutor io_task_executor(base::MessagePumpType::IO);
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net::HostResolver::ManagerOptions options;
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options.max_concurrent_resolves = 6;
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options.max_system_retry_attempts = 3u;
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std::unique_ptr<net::HostResolver> resolver =
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net::HostResolver::CreateStandaloneResolver(NetLog::Get(), options);
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// No need to use a NetworkAnonymizationKey here, since this is an external
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// tool not used by net/ consumers.
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std::unique_ptr<net::HostResolver::ResolveHostRequest> request =
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resolver->CreateRequest(scheme_host_port_, NetworkAnonymizationKey(),
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NetLogWithSource(), absl::nullopt);
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base::RunLoop run_loop;
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rv_ = request->Start(base::BindOnce(&ResolverThread::OnResolutionComplete,
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base::Unretained(this),
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run_loop.QuitClosure()));
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if (rv_ == ERR_IO_PENDING) {
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// Run the message loop until OnResolutionComplete quits it.
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run_loop.Run();
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}
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if (rv_ == OK) {
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*addresses_ = *request->GetAddressResults();
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}
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}
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int ResolverThread::Resolve(url::SchemeHostPort scheme_host_port,
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AddressList* addresses) {
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scheme_host_port_ = std::move(scheme_host_port);
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addresses_ = addresses;
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this->Start();
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this->Join();
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return rv_;
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}
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void ResolverThread::OnResolutionComplete(base::OnceClosure on_done, int rv) {
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rv_ = rv;
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std::move(on_done).Run();
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}
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} // namespace
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// static
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int SynchronousHostResolver::Resolve(url::SchemeHostPort scheme_host_port,
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AddressList* addresses) {
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ResolverThread resolver;
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return resolver.Resolve(std::move(scheme_host_port), addresses);
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}
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} // namespace net
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