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// Copyright 2014 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROME_BROWSER_LOCAL_DISCOVERY_SERVICE_DISCOVERY_CLIENT_MDNS_H_
#define CHROME_BROWSER_LOCAL_DISCOVERY_SERVICE_DISCOVERY_CLIENT_MDNS_H_
#include <memory>
#include <string>
#include "base/observer_list.h"
#include "base/task/sequenced_task_runner.h"
#include "chrome/browser/local_discovery/service_discovery_client.h"
#include "chrome/browser/local_discovery/service_discovery_shared_client.h"
#include "net/dns/mdns_client.h"
#include "services/network/public/cpp/network_connection_tracker.h"
namespace local_discovery {
// Implementation of ServiceDiscoverySharedClient with the front-end on the
// UI thread and the networking code on the IO thread.
class ServiceDiscoveryClientMdns
: public ServiceDiscoverySharedClient,
public network::NetworkConnectionTracker::NetworkConnectionObserver {
public:
class Proxy;
ServiceDiscoveryClientMdns();
ServiceDiscoveryClientMdns(const ServiceDiscoveryClientMdns&) = delete;
ServiceDiscoveryClientMdns& operator=(const ServiceDiscoveryClientMdns&) =
delete;
// ServiceDiscoveryClient:
std::unique_ptr<ServiceWatcher> CreateServiceWatcher(
const std::string& service_type,
ServiceWatcher::UpdatedCallback callback) override;
std::unique_ptr<ServiceResolver> CreateServiceResolver(
const std::string& service_name,
ServiceResolver::ResolveCompleteCallback callback) override;
std::unique_ptr<LocalDomainResolver> CreateLocalDomainResolver(
const std::string& domain,
net::AddressFamily address_family,
LocalDomainResolver::IPAddressCallback callback) override;
// network::NetworkConnectionTracker::NetworkConnectionObserver:
void OnConnectionChanged(network::mojom::ConnectionType type) override;
private:
~ServiceDiscoveryClientMdns() override;
void ScheduleStartNewClient();
void StartNewClient();
void OnInterfaceListReady(const net::InterfaceIndexFamilyList& interfaces);
void OnMdnsInitialized(int net_error);
void InvalidateWeakPtrs();
void OnBeforeMdnsDestroy();
void DestroyMdns();
base::ObserverList<Proxy, true>::Unchecked proxies_;
scoped_refptr<base::SequencedTaskRunner> mdns_runner_;
// Access only on |mdns_runner_| thread.
std::unique_ptr<net::MDnsClient> mdns_;
// Access only on |mdns_runner_| thread.
std::unique_ptr<ServiceDiscoveryClient> client_;
// Counter of restart attempts we have made after network change.
int restart_attempts_ = 0;
// If false, delay tasks until initialization is posted to |mdns_runner_|.
bool need_delay_mdns_tasks_ = true;
base::WeakPtrFactory<ServiceDiscoveryClientMdns> weak_ptr_factory_{this};
};
} // namespace local_discovery
#endif // CHROME_BROWSER_LOCAL_DISCOVERY_SERVICE_DISCOVERY_CLIENT_MDNS_H_
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