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 "base/bind.h"
   8 #include "base/command_line.h"
   9 #include "base/metrics/histogram.h"
  10 #include "base/sys_byteorder.h"
  11 #include "content/public/common/content_switches.h"
  12 #include "net/base/net_util.h"
  13
  14 namespace content {
  15
  16 namespace {
  17
  18 rtc::AdapterType ConvertConnectionTypeToAdapterType(
  19     net::NetworkChangeNotifier::ConnectionType type) {
  20   switch (type) {
  21     case net::NetworkChangeNotifier::CONNECTION_UNKNOWN:
  22         return rtc::ADAPTER_TYPE_UNKNOWN;
  23     case net::NetworkChangeNotifier::CONNECTION_ETHERNET:
  24         return rtc::ADAPTER_TYPE_ETHERNET;
  25     case net::NetworkChangeNotifier::CONNECTION_WIFI:
  26         return rtc::ADAPTER_TYPE_WIFI;
  27     case net::NetworkChangeNotifier::CONNECTION_2G:
  28     case net::NetworkChangeNotifier::CONNECTION_3G:
  29     case net::NetworkChangeNotifier::CONNECTION_4G:
  30         return rtc::ADAPTER_TYPE_CELLULAR;
  31     default:
  32         return rtc::ADAPTER_TYPE_UNKNOWN;
  33   }
  34 }
  35
  36 }  // namespace
  37
  38 IpcNetworkManager::IpcNetworkManager(P2PSocketDispatcher* socket_dispatcher)
  39     : socket_dispatcher_(socket_dispatcher),
  40       start_count_(0),
  41       network_list_received_(false),
  42       weak_factory_(this) {
  43   socket_dispatcher_->AddNetworkListObserver(this);
  44 }
  45
  46 IpcNetworkManager::~IpcNetworkManager() {
  47   DCHECK(!start_count_);
  48   socket_dispatcher_->RemoveNetworkListObserver(this);
  49 }
  50
  51 void IpcNetworkManager::StartUpdating() {
  52   if (network_list_received_) {
  53     // Post a task to avoid reentrancy.
  54     base::MessageLoop::current()->PostTask(
  55         FROM_HERE,
  56         base::Bind(&IpcNetworkManager::SendNetworksChangedSignal,
  57                    weak_factory_.GetWeakPtr()));
  58   }
  59   ++start_count_;
  60 }
  61
  62 void IpcNetworkManager::StopUpdating() {
  63   DCHECK_GT(start_count_, 0);
  64   --start_count_;
  65 }
  66
  67 void IpcNetworkManager::OnNetworkListChanged(
  68     const net::NetworkInterfaceList& list) {
  69
  70   // Update flag if network list received for the first time.
  71   if (!network_list_received_)
  72     network_list_received_ = true;
  73
  74   // Note: 32 and 64 are the arbitrary(kind of) prefix length used to
  75   // differentiate IPv4 and IPv6 addresses.
  76   // rtc::Network uses these prefix_length to compare network
  77   // interfaces discovered.
  78   std::vector<rtc::Network*> networks;
  79   int ipv4_interfaces = 0;
  80   int ipv6_interfaces = 0;
  81   for (net::NetworkInterfaceList::const_iterator it = list.begin();
  82        it != list.end(); it++) {
  83     if (it->address.size() == net::kIPv4AddressSize) {
  84       uint32 address;
  85       memcpy(&address, &it->address[0], sizeof(uint32));
  86       address = rtc::NetworkToHost32(address);
  87       rtc::Network* network = new rtc::Network(
  88           it->name, it->name, rtc::IPAddress(address), 32,
  89           ConvertConnectionTypeToAdapterType(it->type));
  90       network->AddIP(rtc::IPAddress(address));
  91       networks.push_back(network);
  92       ++ipv4_interfaces;
  93     } else if (it->address.size() == net::kIPv6AddressSize) {
  94       in6_addr address;
  95       memcpy(&address, &it->address[0], sizeof(in6_addr));
  96       rtc::IPAddress ip6_addr(address);
  97       if (!rtc::IPIsPrivate(ip6_addr)) {
  98         rtc::Network* network = new rtc::Network(
  99             it->name, it->name, ip6_addr, 64,
 100             ConvertConnectionTypeToAdapterType(it->type));
 101         network->AddIP(ip6_addr);
 102         networks.push_back(network);
 103         ++ipv6_interfaces;
 104       }
 105     }
 106   }
 107
 108
 109   // Send interface counts to UMA.
 110   UMA_HISTOGRAM_COUNTS_100("WebRTC.PeerConnection.IPv4Interfaces",
 111                            ipv4_interfaces);
 112   UMA_HISTOGRAM_COUNTS_100("WebRTC.PeerConnection.IPv6Interfaces",
 113                            ipv6_interfaces);
 114
 115   if (CommandLine::ForCurrentProcess()->HasSwitch(
 116       switches::kAllowLoopbackInPeerConnection)) {
 117     std::string name_v4("loopback_ipv4");
 118     rtc::IPAddress ip_address_v4(INADDR_LOOPBACK);
 119     rtc::Network* network_v4 = new rtc::Network(
 120         name_v4, name_v4, ip_address_v4, 32, rtc::ADAPTER_TYPE_UNKNOWN);
 121     network_v4->AddIP(ip_address_v4);
 122     networks.push_back(network_v4);
 123
 124     std::string name_v6("loopback_ipv6");
 125     rtc::IPAddress ip_address_v6(in6addr_loopback);
 126     rtc::Network* network_v6 = new rtc::Network(
 127         name_v6, name_v6, ip_address_v6, 64, rtc::ADAPTER_TYPE_UNKNOWN);
 128     network_v6->AddIP(ip_address_v6);
 129     networks.push_back(network_v6);
 130   }
 131
 132   bool changed = false;
 133   MergeNetworkList(networks, &changed);
 134   if (changed)
 135     SignalNetworksChanged();
 136 }
 137
 138 void IpcNetworkManager::SendNetworksChangedSignal() {
 139   SignalNetworksChanged();
 140 }
 141
 142 }  // namespace content