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[routing-manager] stop PD if there is another prefix with higher pref…
…erence in netdata (openthread#10289) This commit adds a new IDLE state to PdPrefixManager. PdPrefixManager enters idle state when PD is enabled and there is already a BR requesting PD prefix. When there are multiple BRs publishing PD prefix at the same time, the one with lexcial smaller prefix wins.
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124 changes: 124 additions & 0 deletions
124
tests/scripts/thread-cert/border_router/test_dhcp6pd.py
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| #!/usr/bin/env python3 | ||
| # | ||
| # Copyright (c) 2024, 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 ipaddress | ||
| import typing | ||
| import unittest | ||
|
|
||
| import config | ||
| import thread_cert | ||
|
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| # Test description: | ||
| # | ||
| # This test verifies DHCP6 PD pauses requesting PD prefix when there is another BR advertising PD prefix. | ||
| # | ||
|
|
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| LEADER = 1 | ||
| ROUTER = 2 | ||
|
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|
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| class TestDhcp6Pd(thread_cert.TestCase): | ||
| SUPPORT_NCP = False | ||
| USE_MESSAGE_FACTORY = False | ||
|
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| TOPOLOGY = { | ||
| LEADER: { | ||
| 'name': 'Leader', | ||
| 'allowlist': [ROUTER], | ||
| 'is_otbr': True, | ||
| 'mode': 'rdn', | ||
| }, | ||
| ROUTER: { | ||
| 'name': 'Router', | ||
| 'allowlist': [LEADER], | ||
| 'is_otbr': True, | ||
| 'mode': 'rdn', | ||
| }, | ||
| } | ||
|
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| def test(self): | ||
| leader = self.nodes[LEADER] | ||
| router = self.nodes[ROUTER] | ||
|
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| #--------------------------------------------------------------- | ||
| # Start the server & client devices. | ||
|
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| # Case 1: Only 1 BR receives PD prefix | ||
|
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| leader.start() | ||
| self.simulator.go(config.LEADER_STARTUP_DELAY) | ||
| self.assertEqual(leader.get_state(), 'leader') | ||
| leader.pd_set_enabled(True) | ||
|
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| router.start() | ||
| self.simulator.go(config.ROUTER_STARTUP_DELAY) | ||
| self.assertEqual(router.get_state(), 'router') | ||
| router.pd_set_enabled(True) | ||
|
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| leader.start_pd_radvd_service("2001:db8:abcd:1234::/64") | ||
| self.simulator.go(30) | ||
|
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| self.assertSetEqual({leader.pd_state, router.pd_state}, {"running", "idle"}) | ||
|
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| self.assertEqual(leader.pd_get_prefix(), "2001:db8:abcd:1234::/64") | ||
|
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| # Case 2: More than one BR receives PD prefix | ||
| # The BR with "smaller" PD prefix wins | ||
|
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| # Clean up and ensure no prefix is currently published. | ||
| leader.pd_set_enabled(False) | ||
| router.pd_set_enabled(False) | ||
| self.simulator.go(30) | ||
|
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| leader.start_pd_radvd_service("2001:db8:abcd:1234::/64") | ||
| router.start_pd_radvd_service("2001:db8:1234:abcd::/64") | ||
| leader.pd_set_enabled(True) | ||
| router.pd_set_enabled(True) | ||
| self.simulator.go(30) | ||
|
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| self.assertSetEqual({leader.pd_state, router.pd_state}, {"running", "idle"}) | ||
|
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| # Case 3: When the other BR lost PD prefix, the remaining BR should try to request one. | ||
|
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| if leader.pd_state == 'running': | ||
| br_to_stop = leader | ||
| br_to_continue = router | ||
| expected_prefix = "2001:db8:1234:abcd::/64" | ||
| else: | ||
| br_to_stop = router | ||
| br_to_continue = leader | ||
| expected_prefix = "2001:db8:abcd:1234::/64" | ||
| br_to_stop.pd_set_enabled(False) | ||
| self.simulator.go(30) | ||
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| self.assertEqual(br_to_continue.pd_state, "running") | ||
| self.assertEqual(br_to_continue.pd_get_prefix(), expected_prefix) | ||
|
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| if __name__ == '__main__': | ||
| unittest.main() |
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