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// Copyright 2013 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.
#include "chrome/browser/local_discovery/service_discovery_shared_client.h"
#include "content/public/browser/browser_thread.h"
#if defined(OS_WIN)
#include "base/files/file_path.h"
#include "base/metrics/histogram.h"
#include "base/path_service.h"
#include "base/timer/elapsed_timer.h"
#include "chrome/installer/util/browser_distribution.h"
#include "chrome/installer/util/firewall_manager_win.h"
#endif // OS_WIN
#if defined(OS_MACOSX)
#include "chrome/browser/local_discovery/service_discovery_client_mac_factory.h"
#endif
#if defined(ENABLE_MDNS)
#include "chrome/browser/local_discovery/service_discovery_client_mdns.h"
#include "chrome/browser/local_discovery/service_discovery_client_utility.h"
#endif // ENABLE_MDNS
namespace {
#if defined(OS_WIN)
bool g_is_firewall_ready = false;
bool g_is_firewall_state_reported = false;
void ReportFirewallStats() {
if (g_is_firewall_state_reported)
return;
g_is_firewall_state_reported = true;
base::FilePath exe_path;
if (!PathService::Get(base::FILE_EXE, &exe_path))
return;
base::ElapsedTimer timer;
scoped_ptr<installer::FirewallManager> manager =
installer::FirewallManager::Create(BrowserDistribution::GetDistribution(),
exe_path);
if (!manager)
return;
g_is_firewall_ready = manager->CanUseLocalPorts();
UMA_HISTOGRAM_TIMES("LocalDiscovery.FirewallAccessTime", timer.Elapsed());
UMA_HISTOGRAM_BOOLEAN("LocalDiscovery.IsFirewallReady", g_is_firewall_ready);
}
#endif // OS_WIN
} // namespace
namespace local_discovery {
using content::BrowserThread;
namespace {
ServiceDiscoverySharedClient* g_service_discovery_client = NULL;
} // namespace
ServiceDiscoverySharedClient::ServiceDiscoverySharedClient() {
DCHECK(!g_service_discovery_client);
g_service_discovery_client = this;
}
ServiceDiscoverySharedClient::~ServiceDiscoverySharedClient() {
DCHECK_EQ(g_service_discovery_client, this);
g_service_discovery_client = NULL;
}
#if defined(ENABLE_MDNS) || defined(OS_MACOSX)
scoped_refptr<ServiceDiscoverySharedClient>
ServiceDiscoverySharedClient::GetInstance() {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
if (g_service_discovery_client)
return g_service_discovery_client;
#if defined(OS_WIN)
if (!g_is_firewall_state_reported) {
BrowserThread::PostTask(BrowserThread::FILE, FROM_HERE,
base::Bind(&ReportFirewallStats));
}
#endif // OS_WIN
#if defined(OS_MACOSX)
return ServiceDiscoveryClientMacFactory::CreateInstance();
#else // OS_MACOSX
return new ServiceDiscoveryClientMdns();
#endif // OS_MACOSX
}
// static
void ServiceDiscoverySharedClient::GetInstanceWithoutAlert(
const GetInstanceCallback& callback) {
#if !defined(OS_WIN)
scoped_refptr<ServiceDiscoverySharedClient> result = GetInstance();
return callback.Run(result);
#else // OS_WIN
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
// TODO(vitalybuka): Switch to |ServiceDiscoveryClientMdns| after we find what
// to do with firewall for user-level installs. crbug.com/366408
scoped_refptr<ServiceDiscoverySharedClient> result =
g_service_discovery_client;
if (result.get())
return callback.Run(result);
if (!g_is_firewall_state_reported) {
BrowserThread::PostTaskAndReply(
BrowserThread::FILE,
FROM_HERE,
base::Bind(&ReportFirewallStats),
base::Bind(&ServiceDiscoverySharedClient::GetInstanceWithoutAlert,
callback));
return;
}
result =
g_is_firewall_ready ? GetInstance() : new ServiceDiscoveryClientUtility();
callback.Run(result);
#endif // OS_WIN
}
#else
scoped_refptr<ServiceDiscoverySharedClient>
ServiceDiscoverySharedClient::GetInstance() {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
NOTIMPLEMENTED();
return NULL;
}
#endif // ENABLE_MDNS
} // namespace local_discovery
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