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[scripts] MATN-TC-09: Failure of Primary BBR – Outbound Multicast (#6463)
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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
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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 Secondary BBR can take over
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# forwarding of outbound multicast transmissions from the Thread Network when
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# the Primary BBR disconnects. The Secondary in that case becomes Primary.
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#
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# Topology:
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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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# ROUTER_1 -----------+
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#
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from pktverify.null_field import nullField
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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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class MATN_09_FailureOfPrimaryBBROutboundMulticast(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],
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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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'network_id_timeout': 150,
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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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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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router1.start()
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self.simulator.go(10)
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self.assertEqual('router', router1.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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# 1. Router sends a ping packet to the multicast address, MA1,
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# encapsulated in an MPL packet
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self.assertFalse(router1.ping(MA1))
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self.simulator.go(5)
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# 4a. Switch off BR_1
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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(180)
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# 4b. BR_2 detects the missing Primary BBR and becomes the the Leader of
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# the Thread Network.
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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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# 5. Router_1 sends a ping packet to the multicast address, MA1,
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# encapsulated in an MPL packet.
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self.assertFalse(router1.ping(MA1))
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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_leader_aloc(BR_2)
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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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logging.info(f'vars = {vars}')
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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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pv.verify_attached('BR_2')
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# 1. Router_1 sends a ping packet to the multicast address, MA1,
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# encapsulated in an MPL packet.
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_pkt = pkts.filter_wpan_src64(vars['Router_1']) \
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.filter_AMPLFMA(mpl_seed_id=vars['Router_1_RLOC']) \
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.filter_ping_request() \
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.must_next()
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# 2. BR_1 forwards the multicast ping packet with multicast address,
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# MA1, to the LAN.
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pkts.filter_eth_src(vars['BR_1_ETH']) \
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.filter_ipv6_dst(MA1) \
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.filter_ping_request(identifier=_pkt.icmpv6.echo.identifier) \
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.must_next()
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with pkts.save_index():
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pv.verify_attached('Router_1', 'BR_2')
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# 4b. BR_2 detects the missing Primary BBR and becomes the Leader of the
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# Thread Network, distributing its BBR dataset.
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# Verify that Router_1 has received the new BBR Dataset from BR_2,
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# where:
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# • RLOC16 in Server TLV == The RLOC16 of BR_2
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# All fields in the Service TLV contain valid values.
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pkts.filter_wpan_src64(vars['BR_2']) \
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.filter_mle() \
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.filter(
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lambda p: p.thread_nwd.tlv.server_16 is not nullField and
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vars['BR_2_RLOC16'] in p.thread_nwd.tlv.server_16) \
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.must_next()
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# 5.Router_1 sends a ping packet to the multicast address, MA1,
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# encapsulated in an MPL packet.
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_pkt = pkts.filter_wpan_src64(vars['Router_1']) \
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.filter_AMPLFMA(mpl_seed_id=vars['Router_1_RLOC']) \
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.filter_ping_request() \
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.must_next()
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# 6. BR_2 forwards the multicast ping packet with multicast address,
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# MA1, to the LAN.
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pkts.filter_eth_src(vars['BR_2_ETH']) \
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.filter_ipv6_dst(MA1) \
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.filter_ping_request(identifier=_pkt.icmpv6.echo.identifier) \
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.must_next()
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if __name__ == '__main__':
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unittest.main()
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@@ -616,7 +616,7 @@ _LAYER_FIELDS = {
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'thread_nwd.tlv.service.s_data.seqno': _auto,
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'thread_nwd.tlv.service.s_data.rrdelay': _auto,
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'thread_nwd.tlv.service.s_data.mlrtimeout': _auto,
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'thread_nwd.tlv.server_16': _auto,
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'thread_nwd.tlv.server_16': _list(_auto),
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'thread_nwd.tlv.border_router_16': _list(_auto),
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'thread_nwd.tlv.sub_tlvs': _list(_str),
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# TODO: support thread_nwd.tlv.prefix.length and thread_nwd.tlv.prefix.domain_id
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