src/chrome/browser/local_discovery/service_discovery_shared_client.cc

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "chrome/browser/local_discovery/service_discovery_shared_client.h"
   6
   7 #include "content/public/browser/browser_thread.h"
   8
   9 #if defined(OS_WIN)
  10 #include "base/files/file_path.h"
  11 #include "base/metrics/histogram.h"
  12 #include "base/path_service.h"
  13 #include "base/timer/elapsed_timer.h"
  14 #include "chrome/installer/util/browser_distribution.h"
  15 #include "chrome/installer/util/firewall_manager_win.h"
  16 #endif  // OS_WIN
  17
  18 #if defined(OS_MACOSX)
  19 #include "chrome/browser/local_discovery/service_discovery_client_mac_factory.h"
  20 #endif
  21
  22 #if defined(ENABLE_MDNS)
  23 #include "chrome/browser/local_discovery/service_discovery_client_mdns.h"
  24 #include "chrome/browser/local_discovery/service_discovery_client_utility.h"
  25 #endif  // ENABLE_MDNS
  26
  27 namespace {
  28
  29 #if defined(OS_WIN)
  30
  31 bool g_is_firewall_ready = false;
  32 bool g_is_firewall_state_reported = false;
  33
  34 void ReportFirewallStats() {
  35   if (g_is_firewall_state_reported)
  36     return;
  37   g_is_firewall_state_reported = true;
  38   base::FilePath exe_path;
  39   if (!PathService::Get(base::FILE_EXE, &exe_path))
  40     return;
  41   base::ElapsedTimer timer;
  42   scoped_ptr<installer::FirewallManager> manager =
  43       installer::FirewallManager::Create(BrowserDistribution::GetDistribution(),
  44                                          exe_path);
  45   if (!manager)
  46     return;
  47   g_is_firewall_ready = manager->CanUseLocalPorts();
  48   UMA_HISTOGRAM_TIMES("LocalDiscovery.FirewallAccessTime", timer.Elapsed());
  49   UMA_HISTOGRAM_BOOLEAN("LocalDiscovery.IsFirewallReady", g_is_firewall_ready);
  50 }
  51 #endif  // OS_WIN
  52
  53 }  // namespace
  54
  55
  56 namespace local_discovery {
  57
  58 using content::BrowserThread;
  59
  60 namespace {
  61 ServiceDiscoverySharedClient* g_service_discovery_client = NULL;
  62 }  // namespace
  63
  64 ServiceDiscoverySharedClient::ServiceDiscoverySharedClient() {
  65   DCHECK(!g_service_discovery_client);
  66   g_service_discovery_client = this;
  67 }
  68
  69 ServiceDiscoverySharedClient::~ServiceDiscoverySharedClient() {
  70   DCHECK_EQ(g_service_discovery_client, this);
  71   g_service_discovery_client = NULL;
  72 }
  73
  74 #if defined(ENABLE_MDNS) || defined(OS_MACOSX)
  75
  76 scoped_refptr<ServiceDiscoverySharedClient>
  77     ServiceDiscoverySharedClient::GetInstance() {
  78   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
  79
  80   if (g_service_discovery_client)
  81     return g_service_discovery_client;
  82
  83 #if defined(OS_MACOSX)
  84   return ServiceDiscoveryClientMacFactory::CreateInstance();
  85 #else  // OS_MACOSX
  86
  87   return new ServiceDiscoveryClientMdns();
  88 #endif  // OS_MACOSX
  89 }
  90
  91 // static
  92 void ServiceDiscoverySharedClient::GetInstanceWithoutAlert(
  93     const GetInstanceCallback& callback) {
  94 #if !defined(OS_WIN)
  95
  96   scoped_refptr<ServiceDiscoverySharedClient> result = GetInstance();
  97   return callback.Run(result);
  98
  99 #else   // OS_WIN
 100   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 101   // TODO(vitalybuka): Switch to |ServiceDiscoveryClientMdns| after we find what
 102   // to do with firewall for user-level installs. crbug.com/366408
 103   scoped_refptr<ServiceDiscoverySharedClient> result =
 104       g_service_discovery_client;
 105   if (result)
 106     return callback.Run(result);
 107
 108   if (!g_is_firewall_state_reported) {
 109     BrowserThread::PostTaskAndReply(
 110         BrowserThread::FILE,
 111         FROM_HERE,
 112         base::Bind(&ReportFirewallStats),
 113         base::Bind(&ServiceDiscoverySharedClient::GetInstanceWithoutAlert,
 114                    callback));
 115     return;
 116   }
 117
 118   result =
 119       g_is_firewall_ready ? GetInstance() : new ServiceDiscoveryClientUtility();
 120   callback.Run(result);
 121 #endif  // OS_WIN
 122 }
 123
 124 #else
 125
 126 scoped_refptr<ServiceDiscoverySharedClient>
 127     ServiceDiscoverySharedClient::GetInstance() {
 128   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 129   NOTIMPLEMENTED();
 130   return NULL;
 131 }
 132
 133 #endif  // ENABLE_MDNS
 134
 135 }  // namespace local_discovery