Simple L2 Switch Implementation

jswitch.js

var switchport = function(vlan){
	this.vlan = vlan;
	this.attach = function(device){
		this.device = device.mac;
	}
}

var vlan = function(vlanid, ipaddress){
	this.vlanid = vlanid;
	this.ipaddress = ipaddress || null;
}

var jswitch = function(name, portcount){
	this.name = name;
	this.portcount = portcount;
	this.ports = [];
	this.addPort = function(switchport){
		if(this.ports.length == portcount){
			throw "Port Count Exceeded";
		} else {
			this.ports.push(switchport);
			return 1;
		}
	}
	this.showMacTable = function(port){
		if(port){
			return this.ports[port].device;
		}
		var maclist = [];
		for(var p in this.ports){
			if(this.ports[p].device){
				maclist.push({'port':p, 'mac':this.ports[p].device});
			}
		}
		return maclist;
	}
}

var device = function(name, mac){
	return {'name':name, 'mac':mac};
}

var js = new jswitch('test', 4);

js.addPort(new switchport(new vlan(32)));
js.addPort(new switchport(new vlan(1)));
js.addPort(new switchport(new vlan(34)));
js.addPort(new switchport(new vlan(1)));
console.log(js.name, ' has ', js.ports.length, ' of ', js.portcount, ' ports inserted');

var d = new device('mitch', '1234');

js.ports[0].attach(d);
js.ports[2].attach(new device('ash', '4567'));

console.log(js.showMacTable());