isValidMACAddr() now checks and does stuff instead just true all the time.

components/options.php

@@ -2,6 +2,7 @@
 
 // e-mail, password validation functions
 require_once("../lib/validation.php");
+require_once("Net/MAC.php");
 include_once("../lib/date.php");
 
 
@@ -98,8 +99,11 @@ function changeGuestnetDetails($wiredMAC) {
 
 // Checks whether the given string mac address is valid
 function isValidMACAddr($mac) {
-	// Put code here if needed
-	return TRUE;
+    if (Net_MAC::check($mac)) {
+        return TRUE;
+    }else{
+        return FALSE;
+    }
 }
 
 // Returns the users GuestNet MAC Address if they have one and false otherwise