mirror of
https://github.com/espressif/openthread.git
synced 2026-07-09 13:50:28 +00:00
Abtin Keshavarzian
9f084ac7bb
This commit allows a zero-len prefix `::/0` to be added as an external route in Network Data. Such a prefix can act as a default route. This commit also adds `test_zero_len_external_route.py` testcase to verify the network's behavior using a zero-len external route.
146 lines
4.6 KiB
Python
Executable File
146 lines
4.6 KiB
Python
Executable File
#!/usr/bin/env python3
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#
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# Copyright (c) 2021, The OpenThread Authors.
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions are met:
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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# 3. Neither the name of the copyright holder nor the
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# names of its contributors may be used to endorse or promote products
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# derived from this software without specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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# POSSIBILITY OF SUCH DAMAGE.
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#
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import unittest
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import thread_cert
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# Test description:
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#
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# This test verifies the behavior of the network when a zero length external route prefix "::/0" is added.
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#
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# Topology:
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#
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# leader --- router1
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# \ /
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# \ /
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# router2
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#
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LEADER = 1
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ROUTER1 = 2
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ROUTER2 = 3
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class ZeroLengthExternalRoute(thread_cert.TestCase):
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USE_MESSAGE_FACTORY = False
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SUPPORT_NCP = False
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TOPOLOGY = {
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LEADER: {
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'name': 'LEADER',
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'mode': 'rdn',
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},
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ROUTER1: {
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'name': 'ROUTER2',
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'mode': 'rdn',
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},
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ROUTER2: {
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'name': 'ROUTER2',
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'mode': 'rdn',
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},
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}
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def test(self):
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leader = self.nodes[LEADER]
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router1 = self.nodes[ROUTER1]
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router2 = self.nodes[ROUTER2]
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# Start the nodes and form the network.
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leader.start()
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self.simulator.go(5)
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self.assertEqual(leader.get_state(), 'leader')
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router1.start()
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router2.start()
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self.simulator.go(5)
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self.assertEqual(router1.get_state(), 'router')
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self.assertEqual(router2.get_state(), 'router')
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# Add an on-mesh prefix with SLAAC on router2 (without default
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# route flag).
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router2.add_prefix('fd00:1234::/64', 'paos')
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router2.register_netdata()
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# Add a zero length external route on router1. Also add an IPv6
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# address on router1.
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router1.add_route('::/0', stable=True)
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router1.add_ipaddr('fd00:abcd::1')
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router1.register_netdata()
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self.simulator.go(5)
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# Ping from leader the address added on router1. The zero
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# length external route should ensure the message is routed
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# to router1.
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self.assertTrue(leader.ping('fd00:abcd::1'))
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# Change the on-mesh prefix on router2 to now also have
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# the default route flag.
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router2.remove_prefix('fd00:1234::/64')
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router2.add_prefix('fd00:5678::/64', 'paros')
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router2.register_netdata()
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self.simulator.go(5)
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# Again ping from leader the same address. The explicit
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# external route (even with zero length) on router1 should
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# still be preferred over the default route flag of the
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# on-mesh prefix from router2.
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self.assertTrue(leader.ping('fd00:abcd::1'))
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# Remove the external route on router1.
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router1.remove_route("::/0")
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router1.register_netdata()
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self.simulator.go(5)
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# Now the ping should fail since the message would be routed
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# to router2 (due to its on-mesh prefix with default route
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# flag).
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self.assertFalse(leader.ping('fd00:abcd::1'))
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# Remove the address from router1 and add it on router2 and
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# ping it again from leader to verify that the message is
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# being routed to router2.
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router1.del_ipaddr('fd00:abcd::1')
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router2.add_ipaddr('fd00:abcd::1')
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self.simulator.go(5)
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self.assertTrue(leader.ping('fd00:abcd::1'))
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if __name__ == '__main__':
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unittest.main()
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