From 810d0a8e906735f1710747eadd41177d005eb0a6 Mon Sep 17 00:00:00 2001
From: tigerbot <seth.gibelyou@daplie.com>
Date: Tue, 30 May 2017 12:35:29 -0600
Subject: [PATCH] mDNS responder now sometimes responds directly

---
 lib/mdns.js | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/lib/mdns.js b/lib/mdns.js
index cc08ccd..5447f92 100644
--- a/lib/mdns.js
+++ b/lib/mdns.js
@@ -104,6 +104,7 @@ function createResponse(name, packet, ttl) {
 module.exports.start = function (deps, config) {
   var socket = require('dgram').createSocket({ type: 'udp4', reuseAddr: true });
   var dns = require('dns-suite');
+  var nextBroadcast = -1;
 
   socket.on('message', function (message, rinfo) {
     // console.log('Received %d bytes from %s:%d', message.length, rinfo.address, rinfo.port);
@@ -130,7 +131,13 @@ module.exports.start = function (deps, config) {
 
     randomId.get().then(function (name) {
       var resp = createResponse(name, packet, config.mdns.ttl);
-      socket.send(resp, config.mdns.port, config.mdns.broadcast);
+      var now = Date.now();
+      if (now > nextBroadcast) {
+        socket.send(resp, config.mdns.port, config.mdns.broadcast);
+        nextBroadcast = now + config.mdns.ttl * 1000;
+      } else {
+        socket.send(resp, rinfo.port, rinfo.address);
+      }
     });
   });