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// Copyright (c) 2012 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 "content/renderer/p2p/ipc_network_manager.h"
#include <string>
#include "base/bind.h"
#include "base/command_line.h"
#include "base/metrics/histogram.h"
#include "base/sys_byteorder.h"
#include "content/public/common/content_switches.h"
#include "net/base/net_util.h"
namespace content {
namespace {
rtc::AdapterType ConvertConnectionTypeToAdapterType(
net::NetworkChangeNotifier::ConnectionType type) {
switch (type) {
case net::NetworkChangeNotifier::CONNECTION_UNKNOWN:
return rtc::ADAPTER_TYPE_UNKNOWN;
case net::NetworkChangeNotifier::CONNECTION_ETHERNET:
return rtc::ADAPTER_TYPE_ETHERNET;
case net::NetworkChangeNotifier::CONNECTION_WIFI:
return rtc::ADAPTER_TYPE_WIFI;
case net::NetworkChangeNotifier::CONNECTION_2G:
case net::NetworkChangeNotifier::CONNECTION_3G:
case net::NetworkChangeNotifier::CONNECTION_4G:
return rtc::ADAPTER_TYPE_CELLULAR;
default:
return rtc::ADAPTER_TYPE_UNKNOWN;
}
}
} // namespace
IpcNetworkManager::IpcNetworkManager(NetworkListManager* network_list_manager)
: network_list_manager_(network_list_manager),
start_count_(0),
network_list_received_(false),
weak_factory_(this) {
network_list_manager_->AddNetworkListObserver(this);
}
IpcNetworkManager::~IpcNetworkManager() {
DCHECK(!start_count_);
network_list_manager_->RemoveNetworkListObserver(this);
}
void IpcNetworkManager::StartUpdating() {
if (network_list_received_) {
// Post a task to avoid reentrancy.
base::MessageLoop::current()->PostTask(
FROM_HERE,
base::Bind(&IpcNetworkManager::SendNetworksChangedSignal,
weak_factory_.GetWeakPtr()));
}
++start_count_;
}
void IpcNetworkManager::StopUpdating() {
DCHECK_GT(start_count_, 0);
--start_count_;
}
void IpcNetworkManager::OnNetworkListChanged(
const net::NetworkInterfaceList& list) {
// Update flag if network list received for the first time.
if (!network_list_received_)
network_list_received_ = true;
// rtc::Network uses these prefix_length to compare network
// interfaces discovered.
std::vector<rtc::Network*> networks;
for (net::NetworkInterfaceList::const_iterator it = list.begin();
it != list.end(); it++) {
if (it->address.size() == net::kIPv4AddressSize) {
uint32 address;
memcpy(&address, &it->address[0], sizeof(uint32));
address = rtc::NetworkToHost32(address);
rtc::IPAddress prefix =
rtc::TruncateIP(rtc::IPAddress(address), it->prefix_length);
rtc::Network* network =
new rtc::Network(it->name, it->name, prefix, it->prefix_length,
ConvertConnectionTypeToAdapterType(it->type));
network->AddIP(rtc::IPAddress(address));
networks.push_back(network);
} else if (it->address.size() == net::kIPv6AddressSize) {
in6_addr address;
memcpy(&address, &it->address[0], sizeof(in6_addr));
rtc::InterfaceAddress ip6_addr(address, it->ip_address_attributes);
// Only allow non-deprecated IPv6 addresses which don't contain MAC.
if (rtc::IPIsMacBased(ip6_addr) ||
(it->ip_address_attributes & net::IP_ADDRESS_ATTRIBUTE_DEPRECATED)) {
continue;
}
if (!rtc::IPIsPrivate(ip6_addr)) {
rtc::IPAddress prefix =
rtc::TruncateIP(rtc::IPAddress(ip6_addr), it->prefix_length);
rtc::Network* network =
new rtc::Network(it->name, it->name, prefix, it->prefix_length,
ConvertConnectionTypeToAdapterType(it->type));
network->AddIP(ip6_addr);
networks.push_back(network);
}
}
}
if (base::CommandLine::ForCurrentProcess()->HasSwitch(
switches::kAllowLoopbackInPeerConnection)) {
std::string name_v4("loopback_ipv4");
rtc::IPAddress ip_address_v4(INADDR_LOOPBACK);
rtc::Network* network_v4 = new rtc::Network(
name_v4, name_v4, ip_address_v4, 32, rtc::ADAPTER_TYPE_UNKNOWN);
network_v4->AddIP(ip_address_v4);
networks.push_back(network_v4);
std::string name_v6("loopback_ipv6");
rtc::IPAddress ip_address_v6(in6addr_loopback);
rtc::Network* network_v6 = new rtc::Network(
name_v6, name_v6, ip_address_v6, 64, rtc::ADAPTER_TYPE_UNKNOWN);
network_v6->AddIP(ip_address_v6);
networks.push_back(network_v6);
}
bool changed = false;
NetworkManager::Stats stats;
MergeNetworkList(networks, &changed, &stats);
if (changed)
SignalNetworksChanged();
// Send interface counts to UMA.
UMA_HISTOGRAM_COUNTS_100("WebRTC.PeerConnection.IPv4Interfaces",
stats.ipv4_network_count);
UMA_HISTOGRAM_COUNTS_100("WebRTC.PeerConnection.IPv6Interfaces",
stats.ipv6_network_count);
}
void IpcNetworkManager::SendNetworksChangedSignal() {
SignalNetworksChanged();
}
} // namespace content
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