From 46a359f691f6ec36cde4f59ca32abcbfd11ab2f3 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Nathana=C3=ABl=20L=C3=A9caud=C3=A9?=
 <natcl@users.noreply.github.com>
Date: Wed, 22 Nov 2017 09:56:50 -0500
Subject: [PATCH] Ensure service is stopped before being created

---
 io/mdns/README.md | 2 +-
 io/mdns/mdns.html | 4 ++--
 io/mdns/mdns.js   | 5 +++--
 3 files changed, 6 insertions(+), 5 deletions(-)

diff --git a/io/mdns/README.md b/io/mdns/README.md
index e494b886..c38cc8e8 100644
--- a/io/mdns/README.md
+++ b/io/mdns/README.md
@@ -32,7 +32,7 @@ service discovery capability.
 
 `msg.payload` contains the service object on both arrival and leaving.
 
-`msg.state` contains boolean true or false depending if the service has arrived (true) or gone away (false)..
+`msg.payload.state` contains boolean true or false depending if the service has arrived (true) or gone away (false)..
 
 Within the `msg.payload` object the most interesting things are:
 
diff --git a/io/mdns/mdns.html b/io/mdns/mdns.html
index bd1a32f1..1d0dab51 100644
--- a/io/mdns/mdns.html
+++ b/io/mdns/mdns.html
@@ -18,7 +18,7 @@
 <script type="text/x-red" data-help-name="discovery">
     <p>Provides a Bonjour / Avahi / Zeroconf discovery node.</p>
     <p><code>msg.payload</code> contains the service object on both arrival and leaving.</p>
-    <p><code>msg.state</code> contains boolean <i>true</i> or <i>false</i> depending
+    <p><code>msg.payload.state</code> contains boolean <i>true</i> or <i>false</i> depending
     if the service has arrived (<i>true</i>) or gone away (<i>false</i>).</p>
     <p>Within the msg.payload object the most interesting things are:
     <ul><li>msg.payload.name</li>
@@ -73,7 +73,7 @@
 
 <script type="text/x-red" data-help-name="announce">
     <p>Provides a Bonjour / Avahi / Zeroconf announcement node.</p>
-    <p>If <code>msg.payload</code> is 0 - the announcement is stopped. Any other value starts the announcement process.</p>
+    <p>If <code>msg.payload</code> is <code>false</code> - the announcement is stopped. Any other value starts the announcement process.</p>
     <p>The announcement can be customised by the msg if not configured in the edit panel.</p>
     <p><ul>
         <li><code>msg.service</code> - For a full list of official service types see <i><a href="http://www.dns-sd.org/ServiceTypes.html" target="_new">this list</a></i>.</li>
diff --git a/io/mdns/mdns.js b/io/mdns/mdns.js
index 74296edf..b9853878 100644
--- a/io/mdns/mdns.js
+++ b/io/mdns/mdns.js
@@ -65,8 +65,8 @@ module.exports = function(RED) {
         var node = this;
 
         this.on("input", function(msg) {
-            if ((msg.payload === 0) || (msg.payload === "0")) {
-                node.ad.stop();
+            if (msg.payload == false) {
+                if (node.ad) { node.ad.stop(); }
             }
             else {
                 var service = node.service || msg.service;
@@ -76,6 +76,7 @@ module.exports = function(RED) {
                     options.name = (node.name || msg.name).replace(/\%h/g, os.hostname());
                 }
                 if (node.txt || msg.txtRecord) { options.txtRecord = node.txt || msg.txtRecord }
+                if (node.ad) { node.ad.stop(); }
                 node.ad = mdns.createAdvertisement(service, port, options);
                 node.ad.start();
             }