Add InternetAddress:rawAddress, to return the raw address as a list of bytes.

sdk/lib/io/socket.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.
 
 part of dart.io;
 
 
 /**
  * [InternetAddressType] is the type an [InternetAddress]. Currently,
  * IP version 4 (IPv4) and IP version 6 (IPv6) are supported.
@@ skipping 72 matching lines @@
    */
   String get address;
 
   /**
    * The host used to lookup the address. If there is no host
    * associated with the address this returns the numeric address.
    */
   String get host;
 
   /**
+   * Get the raw address of this [InternetAddress]. The result is either a
+   * 4 or 16 byte long list. The returned list is a copy, making it possible
+   * to change the list without modifying the [InternetAddress].
+   */
+  List<int> get rawAddress;
+
+  /**
    * Returns true if the [InternetAddress] is a loopback address.
    */
   bool get isLoopback;
 
   /**
    * Returns true if the [InternetAddress]s scope is a link-local.
    */
   bool get isLinkLocal;
 
   /**
@@ skipping 561 matching lines @@
     }
     if (address != null) {
       sb.write(", address = ${address.host}");
     }
     if (port != null) {
       sb.write(", port = $port");
     }
     return sb.toString();
   }
 }