From 0e35d1261517b380a4f576943aafd7fc079b89a5 Mon Sep 17 00:00:00 2001
From: David Vultur <david1989mail@yahoo.com>
Date: Wed, 17 Jun 2020 17:18:33 +0300
Subject: [PATCH] Fixed upd4/udp6 socket type

---
 lib/server.js | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/lib/server.js b/lib/server.js
index fd59f52..987e608 100644
--- a/lib/server.js
+++ b/lib/server.js
@@ -1,5 +1,6 @@
 var assert = require('assert');
 var dgram = require('dgram');
+var net = require('net');
 var EventEmitter = require('events').EventEmitter;
 var util = require('util');
 
@@ -47,10 +48,17 @@ Server.prototype.listen = function listen(port, address, callback) {
                 callback = address;
                 address = '0.0.0.0';
         }
+        
+        var address_type = net.isIP(address);
+        
+        if(!address_type)
+                throw new TypeError('ip address is invalid');
+        
+        var socket_type = address_type == 4 ? 'udp4' : 'udp6'
 
         var self = this;
 
-        this._socket = dgram.createSocket('udp6');
+        this._socket = dgram.createSocket(socket_type);
         this._socket.once('listening', function () {
                 self.emit('listening');
                 if (typeof (callback) === 'function')
@@ -71,7 +79,7 @@ Server.prototype.listen = function listen(port, address, callback) {
                 };
 
                 var src = {
-                        family: 'udp6',
+                        family: socket_type,
                         address: rinfo.address,
                         port: rinfo.port
                 };