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Revert "Fix problem with ipv4 over ipv6 on Android"

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This reverts commit da2fd2a2b25ee4bd7b383424cb26d51fb6cc7716,
as well as follow-up b7227a5a10f233cec04642f15a0233e7355bd340,
"Fix handling of partial match for GetVpnUnderlyingAdapterType".

Reason for revert: Breaks downstream test.

First change's description:
> Fix problem with ipv4 over ipv6 on Android
>
> This patch fixes a problem with using ipv4 over ipv6
> addresses on Android. These addresses are discovered
> using 'getifaddr' with interfaces called 'v4-wlan0' or
> 'v4-rmnet' but the Android API does not report them.
>
> This leads to failure when BasicPortAllocator tries
> to bind a socket to the ip-address, making the ipv4
> address unusable.
>
> This solution does the following
> 1) Insert BasicNetworkManager as NetworkBinderInterface
> rather than AndroidNetworkManager.
>
> 2) When SocketServer calls BindSocketToNetwork,
> BasicNetworkManager first lookup the interface name,
> and then calls AndroidNetworkManager.
>
> 3) AndroidNetworkManager will then first try to bind
> using the known ip-addresses, and if it can't find the network
> it will instead match the interface names.
>
> The patch has been tested on real android devices, and works fine.
> And everything is disabled by default, and is enabled by field trial.
>
> My plan is to rollout the feature, checking that it does not introduce
> any problems, and if so, enabled for all.
>
> Bug: webrtc:10707
> Change-Id: I7081ba43d4ce17077acfa5fbab44eda127ac3971
> Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/211003
> Commit-Queue: Jonas Oreland <jonaso@webrtc.org>
> Reviewed-by: Harald Alvestrand <hta@webrtc.org>
> Cr-Commit-Position: refs/heads/master@{#33422}

Second change's description:
> Fix handling of partial match for GetVpnUnderlyingAdapterType
>
> This is a followup to https://webrtc-review.googlesource.com/c/src/+/211003
> and fixes the problem pointed out by deadbeef@, thanks!
>
> Bug: webrtc:10707
> Change-Id: I8dea842b25ba15416353ce4002356183087873c7
> Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/211344
> Commit-Queue: Jonas Oreland <jonaso@webrtc.org>
> Reviewed-by: Harald Alvestrand <hta@webrtc.org>
> Cr-Commit-Position: refs/heads/master@{#33436}

TBR=hta@webrtc.org,jonaso@webrtc.org
NOTRY=True

Bug: webrtc:10707
Change-Id: Ib13127fbf087c7f34ca0ccc6ce1805706f01d19d
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/211740
Reviewed-by: Taylor <deadbeef@webrtc.org>
Commit-Queue: Taylor <deadbeef@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#33453}
This commit is contained in:
Taylor Brandstetter
2021-03-12 13:51:45 -08:00
committed by Commit Bot
parent bc1c93dc6e
commit 1e60490ddb
7 changed files with 31 additions and 269 deletions
Download Patch File Download Diff File Expand all files Collapse all files

41
rtc_base/network.cc
View File

@ -212,8 +212,7 @@ AdapterType GetAdapterTypeFromName(const char* network_name) {
return ADAPTER_TYPE_ETHERNET;
}
if (MatchTypeNameWithIndexPattern(network_name, "wlan") ||
MatchTypeNameWithIndexPattern(network_name, "v4-wlan")) {
if (MatchTypeNameWithIndexPattern(network_name, "wlan")) {
return ADAPTER_TYPE_WIFI;
}
@ -479,15 +478,15 @@ Network* NetworkManagerBase::GetNetworkFromAddress(
return nullptr;
}
BasicNetworkManager::BasicNetworkManager() : BasicNetworkManager(nullptr) {}
BasicNetworkManager::BasicNetworkManager()
: allow_mac_based_ipv6_(
webrtc::field_trial::IsEnabled("WebRTC-AllowMACBasedIPv6")) {}
BasicNetworkManager::BasicNetworkManager(
NetworkMonitorFactory* network_monitor_factory)
: network_monitor_factory_(network_monitor_factory),
allow_mac_based_ipv6_(
webrtc::field_trial::IsEnabled("WebRTC-AllowMACBasedIPv6")),
bind_using_ifname_(
webrtc::field_trial::IsEnabled("WebRTC-BindUsingInterfaceName")) {}
webrtc::field_trial::IsEnabled("WebRTC-AllowMACBasedIPv6")) {}
BasicNetworkManager::~BasicNetworkManager() {}
@ -866,15 +865,6 @@ void BasicNetworkManager::StartNetworkMonitor() {
network_monitor_->SignalNetworksChanged.connect(
this, &BasicNetworkManager::OnNetworksChanged);
}
if (network_monitor_->SupportsBindSocketToNetwork()) {
// Set NetworkBinder on SocketServer so that
// PhysicalSocket::Bind will call
// BasicNetworkManager::BindSocketToNetwork(), (that will lookup interface
// name and then call network_monitor_->BindSocketToNetwork()).
thread_->socketserver()->set_network_binder(this);
}
network_monitor_->Start();
}
@ -883,13 +873,6 @@ void BasicNetworkManager::StopNetworkMonitor() {
return;
}
network_monitor_->Stop();
if (network_monitor_->SupportsBindSocketToNetwork()) {
// Reset NetworkBinder on SocketServer.
if (thread_->socketserver()->network_binder() == this) {
thread_->socketserver()->set_network_binder(nullptr);
}
}
}
void BasicNetworkManager::OnMessage(Message* msg) {
@ -971,20 +954,6 @@ void BasicNetworkManager::DumpNetworks() {
}
}
NetworkBindingResult BasicNetworkManager::BindSocketToNetwork(
int socket_fd,
const IPAddress& address) {
RTC_DCHECK_RUN_ON(thread_);
std::string if_name;
if (bind_using_ifname_) {
Network* net = GetNetworkFromAddress(address);
if (net != nullptr) {
if_name = net->name();
}
}
return network_monitor_->BindSocketToNetwork(socket_fd, address, if_name);
}
Network::Network(const std::string& name,
const std::string& desc,
const IPAddress& prefix,

17
rtc_base/network.h
View File

@ -194,11 +194,11 @@ class RTC_EXPORT NetworkManagerBase : public NetworkManager {
void set_default_local_addresses(const IPAddress& ipv4,
const IPAddress& ipv6);
Network* GetNetworkFromAddress(const rtc::IPAddress& ip) const;
private:
friend class NetworkTest;
Network* GetNetworkFromAddress(const rtc::IPAddress& ip) const;
EnumerationPermission enumeration_permission_;
NetworkList networks_;
@ -225,7 +225,6 @@ class RTC_EXPORT NetworkManagerBase : public NetworkManager {
// of networks using OS APIs.
class RTC_EXPORT BasicNetworkManager : public NetworkManagerBase,
public MessageHandlerAutoCleanup,
public NetworkBinderInterface,
public sigslot::has_slots<> {
public:
BasicNetworkManager();
@ -249,15 +248,6 @@ class RTC_EXPORT BasicNetworkManager : public NetworkManagerBase,
network_ignore_list_ = list;
}
// Bind a socket to interface that ip address belong to.
// Implementation look up interface name and calls
// BindSocketToNetwork on NetworkMonitor.
// The interface name is needed as e.g ipv4 over ipv6 addresses
// are not exposed using Android functions, but it is possible
// bind an ipv4 address to the interface.
NetworkBindingResult BindSocketToNetwork(int socket_fd,
const IPAddress& address) override;
protected:
#if defined(WEBRTC_POSIX)
// Separated from CreateNetworks for tests.
@ -303,8 +293,7 @@ class RTC_EXPORT BasicNetworkManager : public NetworkManagerBase,
nullptr;
std::unique_ptr<NetworkMonitorInterface> network_monitor_
RTC_GUARDED_BY(thread_);
bool allow_mac_based_ipv6_ RTC_GUARDED_BY(thread_) = false;
bool bind_using_ifname_ RTC_GUARDED_BY(thread_) = false;
bool allow_mac_based_ipv6_ = false;
};
// Represents a Unix-type network interface, with a name and single address.

15
rtc_base/network_monitor.h
View File

@ -36,8 +36,6 @@ enum class NetworkPreference {
const char* NetworkPreferenceToString(NetworkPreference preference);
// This interface is set onto a socket server,
// where only the ip address is known at the time of binding.
class NetworkBinderInterface {
public:
// Binds a socket to the network that is attached to |address| so that all
@ -85,19 +83,6 @@ class NetworkMonitorInterface {
virtual NetworkPreference GetNetworkPreference(
const std::string& interface_name) = 0;
// Does |this| NetworkMonitorInterface implement BindSocketToNetwork?
// Only Android returns true.
virtual bool SupportsBindSocketToNetwork() const { return false; }
// Bind a socket to an interface specified by ip address and/or interface
// name. Only implemented on Android.
virtual NetworkBindingResult BindSocketToNetwork(
int socket_fd,
const IPAddress& address,
const std::string& interface_name) {
return NetworkBindingResult::NOT_IMPLEMENTED;
}
// Is this interface available to use? WebRTC shouldn't attempt to use it if
// this returns false.
//

70
rtc_base/network_unittest.cc
View File

@ -76,35 +76,9 @@ class FakeNetworkMonitor : public NetworkMonitorInterface {
unavailable_adapters_ = unavailable_adapters;
}
bool SupportsBindSocketToNetwork() const override { return true; }
NetworkBindingResult BindSocketToNetwork(
int socket_fd,
const IPAddress& address,
const std::string& if_name) override {
if (absl::c_count(addresses_, address) > 0) {
return NetworkBindingResult::SUCCESS;
}
for (auto const& iter : adapters_) {
if (if_name.find(iter) != std::string::npos) {
return NetworkBindingResult::SUCCESS;
}
}
return NetworkBindingResult::ADDRESS_NOT_FOUND;
}
void set_ip_addresses(std::vector<IPAddress> addresses) {
addresses_ = addresses;
}
void set_adapters(std::vector<std::string> adapters) { adapters_ = adapters; }
private:
bool started_ = false;
std::vector<std::string> adapters_;
std::vector<std::string> unavailable_adapters_;
std::vector<IPAddress> addresses_;
};
class FakeNetworkMonitorFactory : public NetworkMonitorFactory {
@ -1305,48 +1279,4 @@ TEST_F(NetworkTest, WebRTC_AllowMACBasedIPv6Address) {
}
#endif
#if defined(WEBRTC_POSIX)
TEST_F(NetworkTest, WebRTC_BindUsingInterfaceName) {
webrtc::test::ScopedFieldTrials field_trials(
"WebRTC-BindUsingInterfaceName/Enabled/");
char if_name1[20] = "wlan0";
char if_name2[20] = "v4-wlan0";
ifaddrs* list = nullptr;
list = AddIpv6Address(list, if_name1, "1000:2000:3000:4000:0:0:0:1",
"FFFF:FFFF:FFFF:FFFF::", 0);
list = AddIpv4Address(list, if_name2, "192.168.0.2", "255.255.255.255");
NetworkManager::NetworkList result;
// Sanity check that both interfaces are included by default.
FakeNetworkMonitorFactory factory;
BasicNetworkManager manager(&factory);
manager.StartUpdating();
CallConvertIfAddrs(manager, list, /*include_ignored=*/false, &result);
EXPECT_EQ(2u, result.size());
ReleaseIfAddrs(list);
bool changed;
// This ensures we release the objects created in CallConvertIfAddrs.
MergeNetworkList(manager, result, &changed);
result.clear();
FakeNetworkMonitor* network_monitor = GetNetworkMonitor(manager);
IPAddress ipv6;
EXPECT_TRUE(IPFromString("1000:2000:3000:4000:0:0:0:1", &ipv6));
IPAddress ipv4;
EXPECT_TRUE(IPFromString("192.168.0.2", &ipv4));
// The network monitor only knwos about the ipv6 address, interface.
network_monitor->set_adapters({"wlan0"});
network_monitor->set_ip_addresses({ipv6});
EXPECT_EQ(manager.BindSocketToNetwork(/* fd */ 77, ipv6),
NetworkBindingResult::SUCCESS);
// But it will bind anyway using string matching...
EXPECT_EQ(manager.BindSocketToNetwork(/* fd */ 77, ipv4),
NetworkBindingResult::SUCCESS);
}
#endif
} // namespace rtc

52
sdk/android/native_unittests/android_network_monitor_unittest.cc
View File

@ -74,7 +74,7 @@ TEST_F(AndroidNetworkMonitorTest, TestFindNetworkHandleUsingIpv4Address) {
network_monitor_->SetNetworkInfos(net_infos);
auto network_handle =
network_monitor_->FindNetworkHandleFromAddressOrName(ipv4_address, "");
network_monitor_->FindNetworkHandleFromAddress(ipv4_address);
ASSERT_TRUE(network_handle.has_value());
EXPECT_EQ(ipv4_handle, *network_handle);
@ -91,9 +91,9 @@ TEST_F(AndroidNetworkMonitorTest, TestFindNetworkHandleUsingFullIpv6Address) {
network_monitor_->SetNetworkInfos(net_infos);
auto network_handle1 =
network_monitor_->FindNetworkHandleFromAddressOrName(ipv6_address1, "");
network_monitor_->FindNetworkHandleFromAddress(ipv6_address1);
auto network_handle2 =
network_monitor_->FindNetworkHandleFromAddressOrName(ipv6_address2, "");
network_monitor_->FindNetworkHandleFromAddress(ipv6_address2);
ASSERT_TRUE(network_handle1.has_value());
EXPECT_EQ(ipv6_handle, *network_handle1);
@ -116,9 +116,9 @@ TEST_F(AndroidNetworkMonitorTest,
network_monitor_->SetNetworkInfos(net_infos);
auto network_handle1 =
network_monitor_->FindNetworkHandleFromAddressOrName(ipv6_address1, "");
network_monitor_->FindNetworkHandleFromAddress(ipv6_address1);
auto network_handle2 =
network_monitor_->FindNetworkHandleFromAddressOrName(ipv6_address2, "");
network_monitor_->FindNetworkHandleFromAddress(ipv6_address2);
ASSERT_TRUE(network_handle1.has_value());
EXPECT_EQ(ipv6_handle, *network_handle1);
@ -126,47 +126,5 @@ TEST_F(AndroidNetworkMonitorTest,
EXPECT_EQ(ipv6_handle, *network_handle2);
}
TEST_F(AndroidNetworkMonitorTest, TestFindNetworkHandleUsingIfName) {
ScopedFieldTrials field_trials("WebRTC-BindUsingInterfaceName/Enabled/");
// Start() updates the states introduced by the field trial.
network_monitor_->Start();
jni::NetworkHandle ipv6_handle = 200;
rtc::IPAddress ipv6_address1 = GetIpAddressFromIpv6String(kTestIpv6Address1);
// Set up an IPv6 network.
jni::NetworkInformation net_info =
CreateNetworkInformation("wlan0", ipv6_handle, ipv6_address1);
std::vector<jni::NetworkInformation> net_infos(1, net_info);
network_monitor_->SetNetworkInfos(net_infos);
rtc::IPAddress ipv4_address(kTestIpv4Address);
// Search using ip address only...
auto network_handle1 =
network_monitor_->FindNetworkHandleFromAddressOrName(ipv4_address, "");
// Search using ip address AND if_name (for typical ipv4 over ipv6 tunnel).
auto network_handle2 = network_monitor_->FindNetworkHandleFromAddressOrName(
ipv4_address, "v4-wlan0");
ASSERT_FALSE(network_handle1.has_value());
ASSERT_TRUE(network_handle2.has_value());
EXPECT_EQ(ipv6_handle, *network_handle2);
}
TEST_F(AndroidNetworkMonitorTest, TestUnderlyingVpnType) {
ScopedFieldTrials field_trials("WebRTC-BindUsingInterfaceName/Enabled/");
jni::NetworkHandle ipv4_handle = 100;
rtc::IPAddress ipv4_address(kTestIpv4Address);
jni::NetworkInformation net_info =
CreateNetworkInformation("wlan0", ipv4_handle, ipv4_address);
net_info.type = jni::NETWORK_VPN;
net_info.underlying_type_for_vpn = jni::NETWORK_WIFI;
network_monitor_->SetNetworkInfos({net_info});
EXPECT_EQ(rtc::ADAPTER_TYPE_WIFI,
network_monitor_->GetVpnUnderlyingAdapterType("v4-wlan0"));
}
} // namespace test
} // namespace webrtc

79
sdk/android/src/jni/android_network_monitor.cc
View File

@ -247,8 +247,11 @@ void AndroidNetworkMonitor::Start() {
find_network_handle_without_ipv6_temporary_part_ =
webrtc::field_trial::IsEnabled(
"WebRTC-FindNetworkHandleWithoutIpv6TemporaryPart");
bind_using_ifname_ =
webrtc::field_trial::IsEnabled("WebRTC-BindUsingInterfaceName");
// This is kind of magic behavior, but doing this allows the SocketServer to
// use this as a NetworkBinder to bind sockets on a particular network when
// it creates sockets.
network_thread_->socketserver()->set_network_binder(this);
// Needed for restart after Stop().
safety_flag_->SetAlive();
@ -282,8 +285,7 @@ void AndroidNetworkMonitor::Stop() {
// https://cs.chromium.org/chromium/src/net/udp/udp_socket_posix.cc
rtc::NetworkBindingResult AndroidNetworkMonitor::BindSocketToNetwork(
int socket_fd,
const rtc::IPAddress& address,
const std::string& if_name) {
const rtc::IPAddress& address) {
RTC_DCHECK_RUN_ON(network_thread_);
// Android prior to Lollipop didn't have support for binding sockets to
@ -301,18 +303,12 @@ rtc::NetworkBindingResult AndroidNetworkMonitor::BindSocketToNetwork(
}
absl::optional<NetworkHandle> network_handle =
FindNetworkHandleFromAddressOrName(address, if_name);
FindNetworkHandleFromAddress(address);
if (!network_handle) {
RTC_LOG(LS_WARNING)
<< "BindSocketToNetwork unable to find network handle for"
<< " addr: " << address.ToSensitiveString() << " ifname: " << if_name;
return rtc::NetworkBindingResult::ADDRESS_NOT_FOUND;
}
if (*network_handle == 0 /* NETWORK_UNSPECIFIED */) {
RTC_LOG(LS_WARNING) << "BindSocketToNetwork 0 network handle for"
<< " addr: " << address.ToSensitiveString()
<< " ifname: " << if_name;
return rtc::NetworkBindingResult::NOT_IMPLEMENTED;
}
@ -379,19 +375,11 @@ rtc::NetworkBindingResult AndroidNetworkMonitor::BindSocketToNetwork(
// ERR_NETWORK_CHANGED, rather than MapSystemError(ENONET) which gives back
// the less descriptive ERR_FAILED.
if (rv == 0) {
RTC_LOG(LS_VERBOSE) << "BindSocketToNetwork bound network handle for"
<< " addr: " << address.ToSensitiveString()
<< " ifname: " << if_name;
return rtc::NetworkBindingResult::SUCCESS;
}
RTC_LOG(LS_WARNING) << "BindSocketToNetwork got error: " << rv
<< " addr: " << address.ToSensitiveString()
<< " ifname: " << if_name;
if (rv == ENONET) {
return rtc::NetworkBindingResult::NETWORK_CHANGED;
}
return rtc::NetworkBindingResult::FAILURE;
}
@ -414,9 +402,8 @@ void AndroidNetworkMonitor::OnNetworkConnected_n(
}
absl::optional<NetworkHandle>
AndroidNetworkMonitor::FindNetworkHandleFromAddressOrName(
const rtc::IPAddress& ip_address,
const std::string& if_name) const {
AndroidNetworkMonitor::FindNetworkHandleFromAddress(
const rtc::IPAddress& ip_address) const {
RTC_DCHECK_RUN_ON(network_thread_);
RTC_LOG(LS_INFO) << "Find network handle.";
if (find_network_handle_without_ipv6_temporary_part_) {
@ -430,31 +417,14 @@ AndroidNetworkMonitor::FindNetworkHandleFromAddressOrName(
return absl::make_optional(iter.first);
}
}
return absl::nullopt;
} else {
auto iter = network_handle_by_address_.find(ip_address);
if (iter != network_handle_by_address_.end()) {
if (iter == network_handle_by_address_.end()) {
return absl::nullopt;
}
return absl::make_optional(iter->second);
}
}
return FindNetworkHandleFromIfname(if_name);
}
absl::optional<NetworkHandle>
AndroidNetworkMonitor::FindNetworkHandleFromIfname(
const std::string& if_name) const {
RTC_DCHECK_RUN_ON(network_thread_);
if (bind_using_ifname_) {
for (auto const& iter : network_info_by_handle_) {
if (if_name.find(iter.second.interface_name) != std::string::npos) {
// Use partial match so that e.g if_name="v4-wlan0" is matched
// agains iter.first="wlan0"
return absl::make_optional(iter.first);
}
}
}
return absl::nullopt;
}
void AndroidNetworkMonitor::OnNetworkDisconnected_n(NetworkHandle handle) {
@ -500,18 +470,6 @@ rtc::AdapterType AndroidNetworkMonitor::GetAdapterType(
rtc::AdapterType type = (iter == adapter_type_by_name_.end())
? rtc::ADAPTER_TYPE_UNKNOWN
: iter->second;
if (type == rtc::ADAPTER_TYPE_UNKNOWN && bind_using_ifname_) {
for (auto const& iter : adapter_type_by_name_) {
// Use partial match so that e.g if_name="v4-wlan0" is matched
// agains iter.first="wlan0"
if (if_name.find(iter.first) != std::string::npos) {
type = iter.second;
break;
}
}
}
if (type == rtc::ADAPTER_TYPE_UNKNOWN) {
RTC_LOG(LS_WARNING) << "Get an unknown type for the interface " << if_name;
}
@ -525,17 +483,6 @@ rtc::AdapterType AndroidNetworkMonitor::GetVpnUnderlyingAdapterType(
rtc::AdapterType type = (iter == vpn_underlying_adapter_type_by_name_.end())
? rtc::ADAPTER_TYPE_UNKNOWN
: iter->second;
if (type == rtc::ADAPTER_TYPE_UNKNOWN && bind_using_ifname_) {
// Use partial match so that e.g if_name="v4-wlan0" is matched
// agains iter.first="wlan0"
for (auto const& iter : vpn_underlying_adapter_type_by_name_) {
if (if_name.find(iter.first) != std::string::npos) {
type = iter.second;
break;
}
}
}
return type;
}

26
sdk/android/src/jni/android_network_monitor.h
View File

@ -64,7 +64,8 @@ struct NetworkInformation {
std::string ToString() const;
};
class AndroidNetworkMonitor : public rtc::NetworkMonitorInterface {
class AndroidNetworkMonitor : public rtc::NetworkMonitorInterface,
public rtc::NetworkBinderInterface {
public:
AndroidNetworkMonitor(JNIEnv* env,
const JavaRef<jobject>& j_application_context);
@ -76,14 +77,9 @@ class AndroidNetworkMonitor : public rtc::NetworkMonitorInterface {
void Start() override;
void Stop() override;
// Does |this| NetworkMonitorInterface implement BindSocketToNetwork?
// Only Android returns true.
virtual bool SupportsBindSocketToNetwork() const override { return true; }
rtc::NetworkBindingResult BindSocketToNetwork(
int socket_fd,
const rtc::IPAddress& address,
const std::string& if_name) override;
const rtc::IPAddress& address) override;
rtc::AdapterType GetAdapterType(const std::string& if_name) override;
rtc::AdapterType GetVpnUnderlyingAdapterType(
const std::string& if_name) override;
@ -110,9 +106,8 @@ class AndroidNetworkMonitor : public rtc::NetworkMonitorInterface {
jint preference);
// Visible for testing.
absl::optional<NetworkHandle> FindNetworkHandleFromAddressOrName(
const rtc::IPAddress& address,
const std::string& ifname) const;
absl::optional<NetworkHandle> FindNetworkHandleFromAddress(
const rtc::IPAddress& address) const;
private:
void OnNetworkConnected_n(const NetworkInformation& network_info);
@ -120,9 +115,6 @@ class AndroidNetworkMonitor : public rtc::NetworkMonitorInterface {
void OnNetworkPreference_n(NetworkType type,
rtc::NetworkPreference preference);
absl::optional<NetworkHandle> FindNetworkHandleFromIfname(
const std::string& ifname) const;
const int android_sdk_int_;
ScopedJavaGlobalRef<jobject> j_application_context_;
ScopedJavaGlobalRef<jobject> j_network_monitor_;
@ -141,14 +133,6 @@ class AndroidNetworkMonitor : public rtc::NetworkMonitorInterface {
bool find_network_handle_without_ipv6_temporary_part_
RTC_GUARDED_BY(network_thread_) = false;
bool surface_cellular_types_ RTC_GUARDED_BY(network_thread_) = false;
// NOTE: if bind_using_ifname_ is TRUE
// then the adapter name is used with substring matching as follows:
// An adapater name repored by android as 'wlan0'
// will be matched with 'v4-wlan0' ("v4-wlan0".find("wlan0") != npos).
// This applies to adapter_type_by_name_, vpn_underlying_adapter_type_by_name_
// and FindNetworkHandleFromIfname.
bool bind_using_ifname_ RTC_GUARDED_BY(network_thread_) = true;
const rtc::scoped_refptr<PendingTaskSafetyFlag> safety_flag_
RTC_PT_GUARDED_BY(network_thread_);
};