Clients can have multiple addresses

squinnondation/messages.py

@@ -222,7 +222,7 @@ class NeighbourTLV(TLV):
             self.port.to_bytes(2, sys.byteorder)
 
     def handle(self, squirrel: Any, sender: Any) -> None:
-        if squirrel.address == str(self.ip_address) and squirrel.port == self.port:
+        if (self.ip_address, self.port) in squirrel.addresses:
             # This case should never happen (and in our protocol it is not possible),
             # but we include this test as a security measure.
             return