Listen for Wifi-Direct networks and include them in the network list

webrtc/sdk/android/src/jni/androidnetworkmonitor_jni.cc

 /*
  *  Copyright 2015 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 211 matching lines @@
   network_info_by_handle_.clear();
 }
 
 // The implementation is largely taken from UDPSocketPosix::BindToNetwork in
 // https://cs.chromium.org/chromium/src/net/udp/udp_socket_posix.cc
 rtc::NetworkBindingResult AndroidNetworkMonitor::BindSocketToNetwork(
     int socket_fd,
     const rtc::IPAddress& address) {
   RTC_CHECK(thread_checker_.CalledOnValidThread());
 
+  if (socket_fd == 0 /* NETWORK_UNSPECIFIED */) {
+    return rtc::NetworkBindingResult::NOT_IMPLEMENTED;
+  }
+
   jmethodID network_binding_supported_id = GetMethodID(
       jni(), *j_network_monitor_class_, "networkBindingSupported", "()Z");
   // Android prior to Lollipop didn't have support for binding sockets to
   // networks. This may also occur if there is no connectivity manager service.
   bool network_binding_supported = jni()->CallBooleanMethod(
       *j_network_monitor_, network_binding_supported_id);
   CHECK_EXCEPTION(jni())
       << "Error during NetworkMonitor.networkBindingSupported";
   if (!network_binding_supported) {
     LOG(LS_WARNING) << "BindSocketToNetwork is not supported on this platform "
@@ skipping 178 matching lines @@
 JOW(void, NetworkMonitor_nativeNotifyOfNetworkDisconnect)(
     JNIEnv* jni, jobject j_monitor, jlong j_native_monitor,
     jlong network_handle) {
   AndroidNetworkMonitor* network_monitor =
       reinterpret_cast<AndroidNetworkMonitor*>(j_native_monitor);
   network_monitor->OnNetworkDisconnected(
       static_cast<NetworkHandle>(network_handle));
 }
 
 }  // namespace webrtc_jni