| # Copyright (c) 2013 The Chromium OS Authors. All rights reserved. |
| # Use of this source code is governed by a BSD-style license that can be |
| # found in the LICENSE file. |
| |
| import unittest |
| |
| from lansim import tuntap |
| |
| |
| class TunTapTest(unittest.TestCase): |
| """Unit tests for the TunTap class.""" |
| |
| def testCreateTapDevice(self): |
| """Tests creation of a TAP device and its attributes.""" |
| tap = tuntap.TunTap(tuntap.IFF_TAP, name="faketap%d") |
| |
| self.assertEqual(tap.mode, tuntap.IFF_TAP) |
| |
| # Interface name respects the provided format. |
| self.assertTrue(hasattr(tap, 'name')) |
| self.assertTrue(tap.name.startswith('faketap')) |
| |
| # MTU is set for the interface. |
| self.assertTrue(hasattr(tap, 'mtu')) |
| self.assertTrue(tap.mtu) |
| |
| |
| def testCreateTunDevice(self): |
| """Tests creation of a TAP device and its attributes.""" |
| tun = tuntap.TunTap(tuntap.IFF_TUN, name="faketun%d") |
| self.assertEqual(tun.mode, tuntap.IFF_TUN) |
| |
| |
| def testTapDeviceHWAddr(self): |
| """Tests that we can get and set the HW address of a TAP device.""" |
| tap = tuntap.TunTap(tuntap.IFF_TAP, name="faketap%d") |
| family, addr = tap.get_hwaddr() |
| self.assertEqual(family, 1) # Ethernet address |
| |
| # Select a different hwaddr. |
| addr = addr[:-2] + ('11' if addr[-2:] != '11' else '22') |
| |
| new_family, new_addr = tap.set_hwaddr(addr) |
| self.assertEqual(new_family, 1) |
| self.assertEqual(new_addr, addr) |
| |
| new_family, new_addr = tap.get_hwaddr() |
| self.assertEqual(new_family, 1) |
| self.assertEqual(new_addr, addr) |
| |
| |
| def testTapDeviceUpDown(self): |
| """Tests if it is possible to bring up and down the interface.""" |
| tap = tuntap.TunTap(tuntap.IFF_TAP, name="faketap%d") |
| # Set the IP address to a safe value: |
| tap.set_addr('169.254.10.1') |
| self.assertEqual(tap.addr, '169.254.10.1') |
| tap.set_addr('0.0.0.0') |
| |
| self.assertFalse(tap.is_up()) |
| tap.up() |
| self.assertTrue(tap.is_up()) |
| # Checks that calling up() twice is harmless. |
| tap.up() |
| self.assertTrue(tap.is_up()) |
| tap.down() |
| self.assertFalse(tap.is_up()) |
| |
| |
| if __name__ == '__main__': |
| unittest.main() |
| |
