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// Copyright 2014 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 CHROME_BROWSER_LOCAL_DISCOVERY_SERVICE_DISCOVERY_CLIENT_MDNS_H_
#define CHROME_BROWSER_LOCAL_DISCOVERY_SERVICE_DISCOVERY_CLIENT_MDNS_H_
#include <set>
#include <string>
#include "base/cancelable_callback.h"
#include "base/observer_list.h"
#include "chrome/browser/local_discovery/service_discovery_shared_client.h"
#include "chrome/common/local_discovery/service_discovery_client.h"
#include "net/base/network_change_notifier.h"
#include "net/dns/mdns_client.h"
namespace local_discovery {
// Implementation of ServiceDiscoverySharedClient with front-end of UI thread
// and networking code on IO thread.
class ServiceDiscoveryClientMdns
: public ServiceDiscoverySharedClient,
public net::NetworkChangeNotifier::NetworkChangeObserver {
public:
class Proxy;
ServiceDiscoveryClientMdns();
// ServiceDiscoveryClient implementation.
virtual scoped_ptr<ServiceWatcher> CreateServiceWatcher(
const std::string& service_type,
const ServiceWatcher::UpdatedCallback& callback) OVERRIDE;
virtual scoped_ptr<ServiceResolver> CreateServiceResolver(
const std::string& service_name,
const ServiceResolver::ResolveCompleteCallback& callback) OVERRIDE;
virtual scoped_ptr<LocalDomainResolver> CreateLocalDomainResolver(
const std::string& domain,
net::AddressFamily address_family,
const LocalDomainResolver::IPAddressCallback& callback) OVERRIDE;
// net::NetworkChangeNotifier::NetworkChangeObserver implementation.
virtual void OnNetworkChanged(
net::NetworkChangeNotifier::ConnectionType type) OVERRIDE;
private:
virtual ~ServiceDiscoveryClientMdns();
void ScheduleStartNewClient();
void StartNewClient();
void OnInterfaceListReady(const net::InterfaceIndexFamilyList& interfaces);
void OnMdnsInitialized(bool success);
void ReportSuccess();
void InvalidateWeakPtrs();
void OnBeforeMdnsDestroy();
void DestroyMdns();
bool PostToMdnsThread(const base::Closure& task);
ObserverList<Proxy, true> proxies_;
scoped_refptr<base::SequencedTaskRunner> mdns_runner_;
// Access only on |mdns_runner_| thread.
scoped_ptr<net::MDnsClient> mdns_;
// Access only on |mdns_runner_| thread.
scoped_ptr<ServiceDiscoveryClient> client_;
// Counter of restart attempts we have made after network change.
int restart_attempts_;
// If false delay tasks until initialization is posted to |mdns_runner_|
// thread.
bool need_dalay_mdns_tasks_;
// Delayed |mdns_runner_| tasks.
std::vector<base::Closure> delayed_tasks_;
base::WeakPtrFactory<ServiceDiscoveryClientMdns> weak_ptr_factory_;
DISALLOW_COPY_AND_ASSIGN(ServiceDiscoveryClientMdns);
};
} // namespace local_discovery
#endif // CHROME_BROWSER_LOCAL_DISCOVERY_SERVICE_DISCOVERY_CLIENT_MDNS_H_
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