Set IOS Wifi interface type based on the interface name.

webrtc/base/network.cc

 /*
  *  Copyright 2004 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 787 matching lines @@
     AdapterType type = network_monitor_->GetAdapterType(network_name);
     if (type != ADAPTER_TYPE_UNKNOWN) {
       return type;
     }
   }
 #if defined(WEBRTC_IOS)
   // Cell networks are pdp_ipN on iOS.
   if (strncmp(network_name, "pdp_ip", 6) == 0) {
     return ADAPTER_TYPE_CELLULAR;
   }
+  if (strncmp(network_name, "en", 2) == 0) {
+    // This may not be most accurate because sometimes Ethernet interface
+    // name also starts with "en" but it is better than showing it as
+    // "unknown" type.

[pthatcher1, 2016/05/26 21:44:14]

// TODO(honghaiz): Write a proper iOS NetworkManager

?

[honghaiz3, 2016/05/27 01:03:58]

Done.

+    return ADAPTER_TYPE_WIFI;
+  }
 #elif defined(WEBRTC_ANDROID)
   if (strncmp(network_name, "rmnet", 5) == 0 ||
       strncmp(network_name, "v4-rmnet", 8) == 0) {
     return ADAPTER_TYPE_CELLULAR;
   }
   if (strncmp(network_name, "wlan", 4) == 0) {
     return ADAPTER_TYPE_WIFI;
   }
 #endif
 
@@ skipping 151 matching lines @@
   std::stringstream ss;
   // Print out the first space-terminated token of the network desc, plus
   // the IP address.
   ss << "Net[" << description_.substr(0, description_.find(' '))
      << ":" << prefix_.ToSensitiveString() << "/" << prefix_length_
      << ":" << AdapterTypeToString(type_) << "]";
   return ss.str();
 }
 
 }  // namespace rtc