dgram: add getters/setters for private APIs

This commit makes all previously private APIs available via
getters, setters, and wrapper functions.
PR-URL: #21923
Reviewed-By: Anatoli Papirovski <apapirovski@mac.com>
Reviewed-By: Wyatt Preul <wpreul@gmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>

Author: cjihrig

lib/dgram.js

@@ -684,7 +684,69 @@ Socket.prototype.getSendBufferSize = function() {
 };
 
 
+// Legacy private APIs to be deprecated in the future.
+Object.defineProperty(Socket.prototype,'_handle',{
+get(){
+returnthis[kStateSymbol].handle;
+},
+set(val){
+this[kStateSymbol].handle=val;
+}
+});
+
+
+Object.defineProperty(Socket.prototype,'_receiving',{
+get(){
+returnthis[kStateSymbol].receiving;
+},
+set(val){
+this[kStateSymbol].receiving=val;
+}
+});
+
+
+Object.defineProperty(Socket.prototype,'_bindState',{
+get(){
+returnthis[kStateSymbol].bindState;
+},
+set(val){
+this[kStateSymbol].bindState=val;
+}
+});
+
+
+Object.defineProperty(Socket.prototype,'_queue',{
+get(){
+returnthis[kStateSymbol].queue;
+},
+set(val){
+this[kStateSymbol].queue=val;
+}
+});
+
+
+Object.defineProperty(Socket.prototype,'_reuseAddr',{
+get(){
+returnthis[kStateSymbol].reuseAddr;
+},
+set(val){
+this[kStateSymbol].reuseAddr=val;
+}
+});
+
+
+Socket.prototype._healthCheck=function(){
+healthCheck(this);
+};
+
+
+Socket.prototype._stopReceiving=function(){
+stopReceiving(this);
+};
+
+
 module.exports={
+ _createSocketHandle,
  createSocket,
  Socket
 };