Tunnel: Check other arguments

Author: marek22k

meshtastic/tunnel.py

@@ -49,6 +49,12 @@ def __init__(self, iface, subnet="10.115", netmask="255.255.0.0"):
         if not iface:
             raise Exception("Tunnel() must have a interface")
 
+        if not subnet:
+            raise Exception("Tunnel() must have a subnet")
+
+        if not netmask:
+            raise Exception("Tunnel() must have a netmask")
+
         self.iface = iface
         self.subnetPrefix = subnet