fix(transport): Correctly handle messages from non-standard BACnet po…

…rt numbers

lib/transport.js

@@ -3,12 +3,14 @@
 const createSocket      = require('dgram').createSocket;
 const EventEmitter      = require('events').EventEmitter;
 
+const DefaultBACnetPort = 47808;
+
 class Transport extends EventEmitter {
   constructor(settings) {
     super();
     this._settings = settings;
     this._server = createSocket({type: 'udp4', reuseAddr: true});
-    this._server.on('message', (msg, rinfo) => this.emit('message', msg, rinfo.address));
+    this._server.on('message', (msg, rinfo) => this.emit('message', msg, rinfo.address + (rinfo.port === DefaultBACnetPort ? '' : ':' + rinfo.port)));
     this._server.on('error', (err) => this.emit('message', err));
   }
 
@@ -21,7 +23,8 @@ class Transport extends EventEmitter {
   }
 
   send(buffer, offset, receiver) {
-    this._server.send(buffer, 0, offset, this._settings.port, receiver);
+    const [address, port] = receiver.split(':');
+    this._server.send(buffer, 0, offset, port || DefaultBACnetPort, address);
   }
 
   open() {