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// Copyright 2018 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef SERVICES_NETWORK_RESOLVE_HOST_REQUEST_H_
#define SERVICES_NETWORK_RESOLVE_HOST_REQUEST_H_
#include <memory>
#include <optional>
#include "mojo/public/cpp/bindings/pending_receiver.h"
#include "mojo/public/cpp/bindings/pending_remote.h"
#include "mojo/public/cpp/bindings/receiver.h"
#include "mojo/public/cpp/bindings/remote.h"
#include "net/base/completion_once_callback.h"
#include "net/dns/host_resolver.h"
#include "net/dns/public/host_resolver_results.h"
#include "net/dns/public/resolve_error_info.h"
#include "services/network/public/mojom/host_resolver.mojom.h"
namespace net {
class NetLog;
class NetworkAnonymizationKey;
} // namespace net
namespace network {
// Manager of a single Mojo request to NetworkContext::ResolveHost(). Binds
// itself as the implementation of the control handle, and manages request
// lifetime and cancellation.
class ResolveHostRequest : public mojom::ResolveHostHandle {
public:
ResolveHostRequest(
net::HostResolver* resolver,
mojom::HostResolverHostPtr host,
const net::NetworkAnonymizationKey& network_anonymization_key,
const std::optional<net::HostResolver::ResolveHostParameters>&
optional_parameters,
net::NetLog* net_log);
ResolveHostRequest(const ResolveHostRequest&) = delete;
ResolveHostRequest& operator=(const ResolveHostRequest&) = delete;
~ResolveHostRequest() override;
int Start(
mojo::PendingReceiver<mojom::ResolveHostHandle> control_handle_request,
mojo::PendingRemote<mojom::ResolveHostClient> pending_response_client,
net::CompletionOnceCallback callback);
// ResolveHostHandle overrides.
void Cancel(int error) override;
private:
void OnComplete(int error);
net::ResolveErrorInfo GetResolveErrorInfo() const;
net::AddressList GetAddressResults() const;
net::HostResolverEndpointResults GetAlternativeEndpoints() const;
void SignalNonAddressResults();
std::unique_ptr<net::HostResolver::ResolveHostRequest> internal_request_;
mojo::Receiver<mojom::ResolveHostHandle> control_handle_receiver_{this};
mojo::Remote<mojom::ResolveHostClient> response_client_;
net::CompletionOnceCallback callback_;
bool cancelled_ = false;
// Error info for a cancelled request.
net::ResolveErrorInfo resolve_error_info_;
};
} // namespace network
#endif // SERVICES_NETWORK_RESOLVE_HOST_REQUEST_H_
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