content/renderer/p2p/ipc_network_manager.cc

   1 // Copyright (c) 2012 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 "content/renderer/p2p/ipc_network_manager.h"
   6
   7 #include <string>
   8 #include "base/bind.h"
   9 #include "base/command_line.h"
  10 #include "base/location.h"
  11 #include "base/metrics/histogram.h"
  12 #include "base/single_thread_task_runner.h"
  13 #include "base/sys_byteorder.h"
  14 #include "base/thread_task_runner_handle.h"
  15 #include "content/public/common/content_switches.h"
  16 #include "net/base/ip_address_number.h"
  17 #include "net/base/net_util.h"
  18 #include "net/base/network_change_notifier.h"
  19
  20 namespace content {
  21
  22 namespace {
  23
  24 rtc::AdapterType ConvertConnectionTypeToAdapterType(
  25     net::NetworkChangeNotifier::ConnectionType type) {
  26   switch (type) {
  27     case net::NetworkChangeNotifier::CONNECTION_UNKNOWN:
  28         return rtc::ADAPTER_TYPE_UNKNOWN;
  29     case net::NetworkChangeNotifier::CONNECTION_ETHERNET:
  30         return rtc::ADAPTER_TYPE_ETHERNET;
  31     case net::NetworkChangeNotifier::CONNECTION_WIFI:
  32         return rtc::ADAPTER_TYPE_WIFI;
  33     case net::NetworkChangeNotifier::CONNECTION_2G:
  34     case net::NetworkChangeNotifier::CONNECTION_3G:
  35     case net::NetworkChangeNotifier::CONNECTION_4G:
  36         return rtc::ADAPTER_TYPE_CELLULAR;
  37     default:
  38         return rtc::ADAPTER_TYPE_UNKNOWN;
  39   }
  40 }
  41
  42 }  // namespace
  43
  44 IpcNetworkManager::IpcNetworkManager(NetworkListManager* network_list_manager)
  45     : network_list_manager_(network_list_manager),
  46       start_count_(0),
  47       network_list_received_(false),
  48       weak_factory_(this) {
  49   network_list_manager_->AddNetworkListObserver(this);
  50 }
  51
  52 IpcNetworkManager::~IpcNetworkManager() {
  53   DCHECK(!start_count_);
  54   network_list_manager_->RemoveNetworkListObserver(this);
  55 }
  56
  57 void IpcNetworkManager::StartUpdating() {
  58   if (network_list_received_) {
  59     // Post a task to avoid reentrancy.
  60     base::ThreadTaskRunnerHandle::Get()->PostTask(
  61         FROM_HERE, base::Bind(&IpcNetworkManager::SendNetworksChangedSignal,
  62                               weak_factory_.GetWeakPtr()));
  63   }
  64   ++start_count_;
  65 }
  66
  67 void IpcNetworkManager::StopUpdating() {
  68   DCHECK_GT(start_count_, 0);
  69   --start_count_;
  70 }
  71
  72 void IpcNetworkManager::OnNetworkListChanged(
  73     const net::NetworkInterfaceList& list) {
  74
  75   // Update flag if network list received for the first time.
  76   if (!network_list_received_)
  77     network_list_received_ = true;
  78
  79   // rtc::Network uses these prefix_length to compare network
  80   // interfaces discovered.
  81   std::vector<rtc::Network*> networks;
  82   for (net::NetworkInterfaceList::const_iterator it = list.begin();
  83        it != list.end(); it++) {
  84     if (it->address.size() == net::kIPv4AddressSize) {
  85       uint32 address;
  86       memcpy(&address, &it->address[0], sizeof(uint32));
  87       address = rtc::NetworkToHost32(address);
  88       rtc::IPAddress prefix =
  89           rtc::TruncateIP(rtc::IPAddress(address), it->prefix_length);
  90       rtc::Network* network =
  91           new rtc::Network(it->name, it->name, prefix, it->prefix_length,
  92                            ConvertConnectionTypeToAdapterType(it->type));
  93       network->AddIP(rtc::IPAddress(address));
  94       networks.push_back(network);
  95     } else if (it->address.size() == net::kIPv6AddressSize) {
  96       in6_addr address;
  97       memcpy(&address, &it->address[0], sizeof(in6_addr));
  98       rtc::InterfaceAddress ip6_addr(address, it->ip_address_attributes);
  99
 100       // Only allow non-deprecated IPv6 addresses which don't contain MAC.
 101       if (rtc::IPIsMacBased(ip6_addr) ||
 102           (it->ip_address_attributes & net::IP_ADDRESS_ATTRIBUTE_DEPRECATED)) {
 103         continue;
 104       }
 105
 106       if (!rtc::IPIsPrivate(ip6_addr)) {
 107         rtc::IPAddress prefix =
 108             rtc::TruncateIP(rtc::IPAddress(ip6_addr), it->prefix_length);
 109         rtc::Network* network =
 110             new rtc::Network(it->name, it->name, prefix, it->prefix_length,
 111                              ConvertConnectionTypeToAdapterType(it->type));
 112         network->AddIP(ip6_addr);
 113         networks.push_back(network);
 114       }
 115     }
 116   }
 117
 118   if (base::CommandLine::ForCurrentProcess()->HasSwitch(
 119           switches::kAllowLoopbackInPeerConnection)) {
 120     std::string name_v4("loopback_ipv4");
 121     rtc::IPAddress ip_address_v4(INADDR_LOOPBACK);
 122     rtc::Network* network_v4 = new rtc::Network(
 123         name_v4, name_v4, ip_address_v4, 32, rtc::ADAPTER_TYPE_UNKNOWN);
 124     network_v4->AddIP(ip_address_v4);
 125     networks.push_back(network_v4);
 126
 127     std::string name_v6("loopback_ipv6");
 128     rtc::IPAddress ip_address_v6(in6addr_loopback);
 129     rtc::Network* network_v6 = new rtc::Network(
 130         name_v6, name_v6, ip_address_v6, 64, rtc::ADAPTER_TYPE_UNKNOWN);
 131     network_v6->AddIP(ip_address_v6);
 132     networks.push_back(network_v6);
 133   }
 134
 135   bool changed = false;
 136   NetworkManager::Stats stats;
 137   MergeNetworkList(networks, &changed, &stats);
 138   if (changed)
 139     SignalNetworksChanged();
 140
 141   // Send interface counts to UMA.
 142   UMA_HISTOGRAM_COUNTS_100("WebRTC.PeerConnection.IPv4Interfaces",
 143                            stats.ipv4_network_count);
 144   UMA_HISTOGRAM_COUNTS_100("WebRTC.PeerConnection.IPv6Interfaces",
 145                            stats.ipv6_network_count);
 146 }
 147
 148 void IpcNetworkManager::SendNetworksChangedSignal() {
 149   SignalNetworksChanged();
 150 }
 151
 152 }  // namespace content