Don't supply host names for the fixed internet addresses

runtime/bin/socket_patch.dart

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 patch class RawServerSocket {
   /* patch */ static Future<RawServerSocket> bind(address,
                                                   int port,
                                                   {int backlog: 0,
                                                    bool v6Only: false}) {
     return _RawServerSocket.bind(address, port, backlog, v6Only);
@@ skipping 55 matching lines @@
       new _InternetAddress.fixed(_ADDRESS_LOOPBACK_IP_V4);
   static _InternetAddress LOOPBACK_IP_V6 =
       new _InternetAddress.fixed(_ADDRESS_LOOPBACK_IP_V6);
   static _InternetAddress ANY_IP_V4 =
       new _InternetAddress.fixed(_ADDRESS_ANY_IP_V4);
   static _InternetAddress ANY_IP_V6 =
       new _InternetAddress.fixed(_ADDRESS_ANY_IP_V6);
 
   final InternetAddressType type;
   final String address;
-  final String host;
+  final String _host;
   final Uint8List _sockaddr_storage;
 
+  String get host => _host != null ? _host : address;
+
   bool get isLoopback {
     switch (type) {
       case InternetAddressType.IP_V4:
         return _sockaddr_storage[_IPV4_ADDR_OFFSET] == 127;
 
       case InternetAddressType.IP_V6:
         for (int i = 0; i < _IPV6_ADDR_LENGTH - 1; i++) {
           if (_sockaddr_storage[_IPV6_ADDR_OFFSET + i] != 0) return false;
         }
         int lastByteIndex = _IPV6_ADDR_OFFSET + _IPV6_ADDR_LENGTH - 1;
@@ skipping 12 matching lines @@
         // Checking for fe80::/10.
         return _sockaddr_storage[_IPV6_ADDR_OFFSET] == 0xFE &&
             (_sockaddr_storage[_IPV6_ADDR_OFFSET + 1] & 0xB0) == 0x80;
     }
   }
 
   Future<InternetAddress> reverse() => _NativeSocket.reverseLookup(this);
 
   _InternetAddress(InternetAddressType this.type,
                    String this.address,
-                   String this.host,
+                   String this._host,
                    List<int> this._sockaddr_storage);
 
   factory _InternetAddress.fixed(int id) {
     var sockaddr = _fixed(id);
     switch (id) {
       case _ADDRESS_LOOPBACK_IP_V4:
         return new _InternetAddress(
-            InternetAddressType.IP_V4, "127.0.0.1", "localhost", sockaddr);
+            InternetAddressType.IP_V4, "127.0.0.1", null, sockaddr);
       case _ADDRESS_LOOPBACK_IP_V6:
         return new _InternetAddress(
-            InternetAddressType.IP_V6, "::1", "ip6-localhost", sockaddr);
+            InternetAddressType.IP_V6, "::1", null, sockaddr);
       case _ADDRESS_ANY_IP_V4:
         return new _InternetAddress(
             InternetAddressType.IP_V4, "0.0.0.0", "0.0.0.0", sockaddr);
       case _ADDRESS_ANY_IP_V6:
         return new _InternetAddress(
             InternetAddressType.IP_V6, "::", "::", sockaddr);
       default:
         assert(false);
         throw new ArgumentError();
     }
@@ skipping 303 matching lines @@
     return localPort = nativeGetPort();
   }
 
   int get remotePort {
     return nativeGetRemotePeer()[1];
   }
 
   InternetAddress get remoteAddress {
     var result = nativeGetRemotePeer()[0];
     var type = new InternetAddressType._from(result[0]);
-    return new _InternetAddress(type, result[1], "", result[2]);
+    return new _InternetAddress(type, result[1], null, result[2]);
   }
 
   // Multiplexes socket events to the socket handlers.
   void multiplex(int events) {
     canActivateEvents = false;
     for (int i = FIRST_EVENT; i <= LAST_EVENT; i++) {
       if (((events & (1 << i)) != 0)) {
         if (i == CLOSED_EVENT &&
             typeFlags != TYPE_LISTENING_SOCKET &&
             !isClosing &&
@@ skipping 761 matching lines @@
     if (_detachReady != null) {
       _detachReady.complete(null);
     } else {
       if (_raw != null) {
         _raw.shutdown(SocketDirection.SEND);
         _disableWriteEvent();
       }
     }
   }
 }