| #!/usr/bin/env python3 |
| # |
| # Copyright (c) 2022, The OpenThread Authors. |
| # All rights reserved. |
| # |
| # Redistribution and use in source and binary forms, with or without |
| # modification, are permitted provided that the following conditions are met: |
| # 1. Redistributions of source code must retain the above copyright |
| # notice, this list of conditions and the following disclaimer. |
| # 2. Redistributions in binary form must reproduce the above copyright |
| # notice, this list of conditions and the following disclaimer in the |
| # documentation and/or other materials provided with the distribution. |
| # 3. Neither the name of the copyright holder nor the |
| # names of its contributors may be used to endorse or promote products |
| # derived from this software without specific prior written permission. |
| # |
| # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 'AS IS' |
| # AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| # ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE |
| # LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| # CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| # SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| # INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| # CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| # ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| # POSSIBILITY OF SUCH DAMAGE. |
| # |
| import unittest |
| |
| import thread_cert |
| |
| # Test description: |
| # This test verifies the advertisement of NAT64 prefix in Thread network. |
| # |
| # TODO: add checks for outbound connectivity from Thread device to IPv4 host |
| # after OTBR change is ready. |
| # |
| # Topology: |
| # ----------------(eth)-------------------- |
| # | | |
| # BR (Leader) HOST |
| # | |
| # ROUTER |
| # |
| |
| BR = 1 |
| ROUTER = 2 |
| HOST = 3 |
| |
| # The prefix is set small enough that a random-generated NAT64 prefix is very |
| # likely greater than it. So that the BR will remove the random-generated one. |
| SMALL_NAT64_PREFIX = "fd00:00:00:01:00:00::/96" |
| |
| |
| class Nat64SingleBorderRouter(thread_cert.TestCase): |
| USE_MESSAGE_FACTORY = False |
| |
| TOPOLOGY = { |
| BR: { |
| 'name': 'BR', |
| 'allowlist': [ROUTER], |
| 'is_otbr': True, |
| 'version': '1.2', |
| }, |
| ROUTER: { |
| 'name': 'Router', |
| 'allowlist': [BR], |
| 'version': '1.2', |
| }, |
| HOST: { |
| 'name': 'Host', |
| 'is_host': True |
| }, |
| } |
| |
| def test(self): |
| br = self.nodes[BR] |
| router = self.nodes[ROUTER] |
| host = self.nodes[HOST] |
| |
| host.start(start_radvd=False) |
| self.simulator.go(5) |
| |
| br.start() |
| self.simulator.go(5) |
| self.assertEqual('leader', br.get_state()) |
| |
| router.start() |
| self.simulator.go(5) |
| self.assertEqual('router', router.get_state()) |
| |
| # |
| # Case 1. Border router advertises its local NAT64 prefix. |
| # |
| self.simulator.go(5) |
| local_nat64_prefix = br.get_br_nat64_prefix() |
| |
| self.assertEqual(len(br.get_netdata_nat64_prefix()), 1) |
| nat64_prefix = br.get_netdata_nat64_prefix()[0] |
| self.assertEqual(nat64_prefix, local_nat64_prefix) |
| |
| # |
| # Case 2. |
| # User adds a smaller NAT64 prefix and the local prefix is withdrawn. |
| # User removes the smaller NAT64 prefix and the local prefix is re-added. |
| # |
| br.add_route(SMALL_NAT64_PREFIX, stable=False, nat64=True) |
| br.register_netdata() |
| self.simulator.go(5) |
| |
| self.assertEqual(len(br.get_netdata_nat64_prefix()), 1) |
| self.assertNotEqual(local_nat64_prefix, br.get_netdata_nat64_prefix()[0]) |
| |
| br.remove_route(SMALL_NAT64_PREFIX) |
| br.register_netdata() |
| self.simulator.go(5) |
| |
| self.assertEqual(len(br.get_netdata_nat64_prefix()), 1) |
| self.assertEqual(local_nat64_prefix, br.get_netdata_nat64_prefix()[0]) |
| |
| # |
| # Case 3. Disable and re-enable border routing on the border router. |
| # |
| br.disable_br() |
| self.simulator.go(5) |
| |
| # NAT64 prefix is withdrawn from Network Data. |
| self.assertEqual(len(br.get_netdata_nat64_prefix()), 0) |
| |
| br.enable_br() |
| self.simulator.go(5) |
| |
| # Same NAT64 prefix is advertised to Network Data. |
| self.assertEqual(len(br.get_netdata_nat64_prefix()), 1) |
| self.assertEqual(nat64_prefix, br.get_netdata_nat64_prefix()[0]) |
| |
| # |
| # Case 4. Disable and re-enable ethernet on the border router. |
| # |
| br.disable_ether() |
| self.simulator.go(5) |
| |
| # NAT64 prefix is withdrawn from Network Data. |
| self.assertEqual(len(br.get_netdata_nat64_prefix()), 0) |
| |
| br.enable_ether() |
| self.simulator.go(80) |
| |
| # Same NAT64 prefix is advertised to Network Data. |
| self.assertEqual(len(br.get_netdata_nat64_prefix()), 1) |
| self.assertEqual(nat64_prefix, br.get_netdata_nat64_prefix()[0]) |
| |
| |
| if __name__ == '__main__': |
| unittest.main() |