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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/location.h"
#include "base/metrics/histogram.h"
#include "base/single_thread_task_runner.h"
#include "base/sys_byteorder.h"
#include "base/thread_task_runner_handle.h"
#include "content/public/common/content_switches.h"
#include "jingle/glue/utils.h"
#include "net/base/ip_address_number.h"
#include "net/base/net_util.h"
#include "net/base/network_change_notifier.h"
#include "net/base/network_interfaces.h"
#include "third_party/webrtc/base/socketaddress.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::ThreadTaskRunnerHandle::Get()->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,
const net::IPAddressNumber& default_ipv4_local_address,
const net::IPAddressNumber& default_ipv6_local_address) {
// Update flag if network list received for the first time.
if (!network_list_received_)
network_list_received_ = true;
// Default addresses should be set only when they are in the filtered list of
// network addresses.
bool use_default_ipv4_address = false;
bool use_default_ipv6_address = false;
// 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++) {
rtc::IPAddress ip_address =
jingle_glue::IPAddressNumberToIPAddress(it->address);
DCHECK(!ip_address.IsNil());
rtc::IPAddress prefix = rtc::TruncateIP(ip_address, it->prefix_length);
scoped_ptr<rtc::Network> network(
new rtc::Network(it->name, it->name, prefix, it->prefix_length,
ConvertConnectionTypeToAdapterType(it->type)));
network->set_default_local_address_provider(this);
rtc::InterfaceAddress iface_addr;
if (it->address.size() == net::kIPv4AddressSize) {
use_default_ipv4_address |= (default_ipv4_local_address == it->address);
iface_addr = rtc::InterfaceAddress(ip_address);
} else {
DCHECK(it->address.size() == net::kIPv6AddressSize);
iface_addr = rtc::InterfaceAddress(ip_address, it->ip_address_attributes);
// Only allow non-private, non-deprecated IPv6 addresses which don't
// contain MAC.
if (rtc::IPIsMacBased(iface_addr) ||
(it->ip_address_attributes & net::IP_ADDRESS_ATTRIBUTE_DEPRECATED) ||
rtc::IPIsPrivate(iface_addr)) {
continue;
}
use_default_ipv6_address |= (default_ipv6_local_address == it->address);
}
network->AddIP(iface_addr);
networks.push_back(network.release());
}
// Update the default local addresses.
rtc::IPAddress ipv4_default;
rtc::IPAddress ipv6_defualt;
if (use_default_ipv4_address) {
ipv4_default =
jingle_glue::IPAddressNumberToIPAddress(default_ipv4_local_address);
}
if (use_default_ipv6_address) {
ipv6_defualt =
jingle_glue::IPAddressNumberToIPAddress(default_ipv6_local_address);
}
set_default_local_addresses(ipv4_default, ipv6_defualt);
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->set_default_local_address_provider(this);
network_v4->AddIP(ip_address_v4);
networks.push_back(network_v4);
rtc::IPAddress ipv6_default_address;
// Only add IPv6 loopback if we can get default local address for IPv6. If
// we can't, it means that we don't have IPv6 enabled on this machine and
// bind() to the IPv6 loopback address will fail.
if (GetDefaultLocalAddress(AF_INET6, &ipv6_default_address)) {
DCHECK(!ipv6_default_address.IsNil());
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->set_default_local_address_provider(this);
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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