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[scripts] MATN-TC-15: Change of Primary BBR triggers a re-registration (#6504)
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#!/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 logging
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import unittest
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import pktverify
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from pktverify import packet_verifier, packet_filter, consts
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from pktverify.consts import MA1, MA2
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import config
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import thread_cert
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# Test description:
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# The purpose of this test case is to verify that a Thread End Device detects a
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# change of Primary BBR device and triggers a re-registration to its multicast
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# groups.
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#
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# Topology:
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#
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#
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# ----------------(eth)--------------------
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# |
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# BR_1 (Leader) -----BR_2
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# | |
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# | |
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# | |
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# Router_1-------------+
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# |
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# |
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# TD
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#
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BR_1 = 1
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BR_2 = 2
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ROUTER_1 = 3
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TD = 4
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REG_DELAY = 10
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NETWORK_ID_TIMEOUT = 120
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WAIT_TIME_ALLOWANCE = 30
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class MATN_15_ChangeOfPrimaryBBRTriggersRegistration(thread_cert.TestCase):
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USE_MESSAGE_FACTORY = False
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TOPOLOGY = {
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BR_1: {
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'name': 'BR_1',
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'is_otbr': True,
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'allowlist': [BR_2, ROUTER_1],
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'version': '1.2',
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'router_selection_jitter': 2,
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},
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BR_2: {
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'name': 'BR_2',
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'is_otbr': True,
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'allowlist': [BR_1, ROUTER_1],
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'version': '1.2',
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'router_selection_jitter': 2,
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},
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ROUTER_1: {
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'name': 'Router_1',
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'allowlist': [BR_1, BR_2, TD],
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'version': '1.2',
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'router_selection_jitter': 2,
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'partition_id': 1,
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},
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TD: {
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'name': 'TD',
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'allowlist': [ROUTER_1],
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'version': '1.2',
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'router_selection_jitter': 2,
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'partition_id': 1,
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},
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}
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def test(self):
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br1 = self.nodes[BR_1]
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br2 = self.nodes[BR_2]
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router1 = self.nodes[ROUTER_1]
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td = self.nodes[TD]
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br1.set_backbone_router(reg_delay=REG_DELAY, mlr_timeout=consts.MLR_TIMEOUT_MIN)
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br1.start()
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self.simulator.go(5)
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self.assertEqual('leader', br1.get_state())
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self.assertTrue(br1.is_primary_backbone_router)
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br2.set_backbone_router(reg_delay=REG_DELAY, mlr_timeout=consts.MLR_TIMEOUT_MIN)
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router1.start()
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self.simulator.go(5)
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self.assertEqual('router', router1.get_state())
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td.start()
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self.simulator.go(5)
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self.assertEqual('router', td.get_state())
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br2.start()
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self.simulator.go(5)
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self.assertEqual('router', br2.get_state())
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self.assertFalse(br2.is_primary_backbone_router)
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# TD registers for a multicast address, MA1.
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td.add_ipmaddr(MA1)
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self.simulator.go(20)
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# 1. Disable BR_1 such that BR_2 becomes the Primary BBR for the Thread
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# Network.
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br1.disable_backbone_router()
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br1.thread_stop()
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br1.interface_down()
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self.simulator.go(NETWORK_ID_TIMEOUT + WAIT_TIME_ALLOWANCE)
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# Make sure that BR_2 becomes the primary BBR
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self.assertEqual('disabled', br1.get_state())
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self.assertEqual('leader', br2.get_state())
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self.assertEqual('router', router1.get_state())
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self.assertFalse(br1.is_primary_backbone_router)
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self.assertTrue(br2.is_primary_backbone_router)
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self.collect_ipaddrs()
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self.collect_rloc16s()
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self.collect_rlocs()
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self.collect_extra_vars()
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def verify(self, pv: pktverify.packet_verifier.PacketVerifier):
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pkts = pv.pkts
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vars = pv.vars
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pv.summary.show()
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# Ensure the topology is formed correctly
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pv.verify_attached('Router_1', 'BR_1')
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# 2. TD automatically detects the Primary BBR change and registers for
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# multicast address, MA1, at BR_2.
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# TD unicasts an MLR.req CoAP request as follows:
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# coap://[<BR_2 RLOC or PBBR ALOC>]:MM/n/mr
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# Where the payload contains:
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# IPv6 Addresses TLV: MA1
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_pkt = pkts.filter_wpan_src64(vars['TD']) \
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.filter_ipv6_2dsts(vars['BR_2_RLOC'], consts.PBBR_ALOC) \
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.filter_coap_request('/n/mr') \
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.filter(lambda p: p.thread_meshcop.tlv.ipv6_addr == [MA1]) \
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.must_next()
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# 3. Router_1 forwards the registration request to BR_2.
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pkts.filter_wpan_src64(vars['Router_1']) \
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.filter_ipv6_2dsts(vars['BR_2_RLOC'], consts.PBBR_ALOC) \
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.filter_coap_request('/n/mr') \
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.filter(lambda
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p: p.thread_meshcop.tlv.ipv6_addr == [MA1] and
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p.coap.mid == _pkt.coap.mid) \
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.must_next()
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# 4. BR_2 unicasts an MLR.rsp CoAP response to TD as: 2.04 changed.
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# Where the payload contains:
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# Status TLV: ST_MLR_SUCCESS
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pkts.filter_wpan_src64(vars['BR_2']) \
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.filter_ipv6_dst(vars['TD_RLOC']) \
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.filter_coap_ack('/n/mr') \
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.filter(lambda
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p: p.coap.mid == _pkt.coap.mid and
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p.thread_nm.tlv.status == 0) \
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.must_next()
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# 5. Router_1 forwards the response to TD.
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pkts.filter_wpan_src64(vars['Router_1']) \
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.filter_ipv6_2dsts(vars['TD_RLOC'], vars['TD_LLA']) \
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.filter_coap_ack('/n/mr') \
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.filter(lambda
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p: p.coap.mid == _pkt.coap.mid and
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p.thread_nm.tlv.status == 0) \
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.must_next()
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if __name__ == '__main__':
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unittest.main()
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