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 #include <string>
   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(NetworkListManager* network_list_manager)
  39     : network_list_manager_(network_list_manager),
  40       start_count_(0),
  41       network_list_received_(false),
  42       weak_factory_(this) {
  43   network_list_manager_->AddNetworkListObserver(this);
  44 }
  45
  46 IpcNetworkManager::~IpcNetworkManager() {
  47   DCHECK(!start_count_);
  48   network_list_manager_->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   // rtc::Network uses these prefix_length to compare network
  75   // interfaces discovered.
  76   std::vector<rtc::Network*> networks;
  77   for (net::NetworkInterfaceList::const_iterator it = list.begin();
  78        it != list.end(); it++) {
  79     if (it->address.size() == net::kIPv4AddressSize) {
  80       uint32 address;
  81       memcpy(&address, &it->address[0], sizeof(uint32));
  82       address = rtc::NetworkToHost32(address);
  83       rtc::IPAddress prefix =
  84           rtc::TruncateIP(rtc::IPAddress(address), it->prefix_length);
  85       rtc::Network* network =
  86           new rtc::Network(it->name, it->name, prefix, it->prefix_length,
  87                            ConvertConnectionTypeToAdapterType(it->type));
  88       network->AddIP(rtc::IPAddress(address));
  89       networks.push_back(network);
  90     } else if (it->address.size() == net::kIPv6AddressSize) {
  91       in6_addr address;
  92       memcpy(&address, &it->address[0], sizeof(in6_addr));
  93       rtc::InterfaceAddress ip6_addr(address, it->ip_address_attributes);
  94
  95       // Only allow non-deprecated IPv6 addresses which don't contain MAC.
  96       if (rtc::IPIsMacBased(ip6_addr) ||
  97           (it->ip_address_attributes & net::IP_ADDRESS_ATTRIBUTE_DEPRECATED)) {
  98         continue;
  99       }
 100
 101       if (!rtc::IPIsPrivate(ip6_addr)) {
 102         rtc::IPAddress prefix =
 103             rtc::TruncateIP(rtc::IPAddress(ip6_addr), it->prefix_length);
 104         rtc::Network* network =
 105             new rtc::Network(it->name, it->name, prefix, it->prefix_length,
 106                              ConvertConnectionTypeToAdapterType(it->type));
 107         network->AddIP(ip6_addr);
 108         networks.push_back(network);
 109       }
 110     }
 111   }
 112
 113   if (base::CommandLine::ForCurrentProcess()->HasSwitch(
 114           switches::kAllowLoopbackInPeerConnection)) {
 115     std::string name_v4("loopback_ipv4");
 116     rtc::IPAddress ip_address_v4(INADDR_LOOPBACK);
 117     rtc::Network* network_v4 = new rtc::Network(
 118         name_v4, name_v4, ip_address_v4, 32, rtc::ADAPTER_TYPE_UNKNOWN);
 119     network_v4->AddIP(ip_address_v4);
 120     networks.push_back(network_v4);
 121
 122     std::string name_v6("loopback_ipv6");
 123     rtc::IPAddress ip_address_v6(in6addr_loopback);
 124     rtc::Network* network_v6 = new rtc::Network(
 125         name_v6, name_v6, ip_address_v6, 64, rtc::ADAPTER_TYPE_UNKNOWN);
 126     network_v6->AddIP(ip_address_v6);
 127     networks.push_back(network_v6);
 128   }
 129
 130   bool changed = false;
 131   NetworkManager::Stats stats;
 132   MergeNetworkList(networks, &changed, &stats);
 133   if (changed)
 134     SignalNetworksChanged();
 135
 136   // Send interface counts to UMA.
 137   UMA_HISTOGRAM_COUNTS_100("WebRTC.PeerConnection.IPv4Interfaces",
 138                            stats.ipv4_network_count);
 139   UMA_HISTOGRAM_COUNTS_100("WebRTC.PeerConnection.IPv6Interfaces",
 140                            stats.ipv6_network_count);
 141 }
 142
 143 void IpcNetworkManager::SendNetworksChangedSignal() {
 144   SignalNetworksChanged();
 145 }
 146
 147 }  // namespace content