fix: multiple Advertisements without network

advertisements_without_network.js

@@ -0,0 +1,20 @@
+// docker run --init -it --network none -v $(pwd):/tmp --rm node bash -c "node /tmp/advertisements_without_network.js"
+
+const dnssd = require('./')
+
+const interfaces = require('os').networkInterfaces()
+Object.entries(interfaces).forEach(([name, addresses]) => {
+  console.log(name)
+  console.log(addresses)
+  if (addresses.filter(addressRecord => addressRecord.family === 'IPv4').length) {
+    const ad = new dnssd.Advertisement(dnssd.tcp('http'), 9999, {
+      interface: name
+    })
+    ad.on('error', err => {
+      console.log(err)
+    })
+    ad.start()
+  }
+})
+
+// setInterval(() => console.log('yay'), 1000)

lib/NetworkInterface.js

@@ -434,8 +434,10 @@ NetworkInterface.prototype.stop = function () {
 NetworkInterface.prototype._onError = function (err) {
   debug(this._id + ' had an error: ' + err + '\n' + err.stack);
 
+  if (this._usingMe > 0) {
+    this.emit('error', err);
+  }
   this.stop();
-  this.emit('error', err);
 };
 
 module.exports = NetworkInterface;

src/NetworkInterface.js

@@ -425,11 +425,13 @@ NetworkInterface.prototype.stop = function() {
 };
 
 
-NetworkInterface.prototype._onError = function(err) {
+NetworkInterface.prototype._onError = function (err) {
   debug(`${this._id} had an error: ${err}\n${err.stack}`);
 
+  if (this._usingMe > 0) {
+    this.emit('error', err);
+  }
   this.stop();
-  this.emit('error', err);
 };