def enable_subscription(self, ipaddress, macaddress, expiry=None):
rule_masquerade = Rule(source=ipaddress, jump="MASQUERADE")
rule_restrict = Rule(source=ipaddress, matches=[Match("mac", "--mac-source " + macaddress)], jump="ACCEPT")
table = Table("nat")
table.prepend_rule("POSTROUTING", rule_masquerade)
table.prepend_rule("PREROUTING", rule_restrict)
table.commit()
sys.stderr.write("Enabling " + ipaddress + ", Mac " + macaddress)
time.sleep(3) # Pause
if expiry is not None:
self.call_at(expiry, ipaddress, macaddress)
return True
