| #!/usr/bin/env python3 |
| # |
| # Copyright (c) 2021, 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 behavior of the network when a zero length external route prefix "::/0" is added. |
| # |
| # Topology: |
| # |
| # leader --- router1 |
| # \ / |
| # \ / |
| # router2 |
| # |
| |
| LEADER = 1 |
| ROUTER1 = 2 |
| ROUTER2 = 3 |
| |
| |
| class ZeroLengthExternalRoute(thread_cert.TestCase): |
| USE_MESSAGE_FACTORY = False |
| SUPPORT_NCP = False |
| |
| TOPOLOGY = { |
| LEADER: { |
| 'name': 'LEADER', |
| 'mode': 'rdn', |
| }, |
| ROUTER1: { |
| 'name': 'ROUTER2', |
| 'mode': 'rdn', |
| }, |
| ROUTER2: { |
| 'name': 'ROUTER2', |
| 'mode': 'rdn', |
| }, |
| } |
| |
| def test(self): |
| leader = self.nodes[LEADER] |
| router1 = self.nodes[ROUTER1] |
| router2 = self.nodes[ROUTER2] |
| |
| # Start the nodes and form the network. |
| |
| leader.start() |
| self.simulator.go(5) |
| self.assertEqual(leader.get_state(), 'leader') |
| |
| router1.start() |
| router2.start() |
| self.simulator.go(5) |
| self.assertEqual(router1.get_state(), 'router') |
| self.assertEqual(router2.get_state(), 'router') |
| |
| # Add an on-mesh prefix with SLAAC on router2 (without default |
| # route flag). |
| |
| router2.add_prefix('fd00:1234::/64', 'paos') |
| router2.register_netdata() |
| |
| # Add a zero length external route on router1. Also add an IPv6 |
| # address on router1. |
| |
| router1.add_route('::/0', stable=True) |
| router1.add_ipaddr('fd00:abcd::1') |
| router1.register_netdata() |
| self.simulator.go(5) |
| |
| # Ping from leader the address added on router1. The zero |
| # length external route should ensure the message is routed |
| # to router1. |
| |
| self.assertTrue(leader.ping('fd00:abcd::1')) |
| |
| # Change the on-mesh prefix on router2 to now also have |
| # the default route flag. |
| |
| router2.remove_prefix('fd00:1234::/64') |
| router2.add_prefix('fd00:5678::/64', 'paros') |
| router2.register_netdata() |
| self.simulator.go(5) |
| |
| # Again ping from leader the same address. The explicit |
| # external route (even with zero length) on router1 should |
| # still be preferred over the default route flag of the |
| # on-mesh prefix from router2. |
| |
| self.assertTrue(leader.ping('fd00:abcd::1')) |
| |
| # Remove the external route on router1. |
| |
| router1.remove_route("::/0") |
| router1.register_netdata() |
| self.simulator.go(5) |
| |
| # Now the ping should fail since the message would be routed |
| # to router2 (due to its on-mesh prefix with default route |
| # flag). |
| |
| self.assertFalse(leader.ping('fd00:abcd::1')) |
| |
| # Remove the address from router1 and add it on router2 and |
| # ping it again from leader to verify that the message is |
| # being routed to router2. |
| |
| router1.del_ipaddr('fd00:abcd::1') |
| router2.add_ipaddr('fd00:abcd::1') |
| self.simulator.go(5) |
| self.assertTrue(leader.ping('fd00:abcd::1')) |
| |
| |
| if __name__ == '__main__': |
| unittest.main() |