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[scripts] MATN-TC-16: Large number of multicast group subscriptions to BBR (#6507)
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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 MAS, 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 the Primary BBR can handle a
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# large number (75) of subscriptions to different multicast groups. Multicast
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# registrations are performed each time with 15 multicast addresses per
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# registration request.
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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) |
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# | Host
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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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#
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BR_1 = 1
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ROUTER_1 = 2
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HOST = 3
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REG_DELAY = 10
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class MATN_16_LargeNumberOfMulticastGroupSubscriptionsToBBR(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': [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],
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'version': '1.2',
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'router_selection_jitter': 2,
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},
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HOST: {
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'name': 'Host',
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'is_host': True,
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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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router1 = self.nodes[ROUTER_1]
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host = self.nodes[HOST]
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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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router1.start()
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self.simulator.go(5)
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self.assertEqual('router', router1.get_state())
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host.start(start_radvd=False)
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self.simulator.go(5)
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# Loop steps 1 to 4 with i := 1 to 5.
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for i in range(1, 6):
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# 1. Router_1 registers for 15 multicast addresses, MASi.
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self.assertEqual((0, []), router1.register_multicast_listener(*(MAS[i][1:]),
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timeout=consts.MLR_TIMEOUT_MIN))
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self.simulator.go(5)
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# Loop steps 5 to 6 with i := 1 to 5.
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for i in range(1, 6):
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# 5. Host sends a ping packet to the multicast address,
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# MASi[ 3 * i - 1], on the backbone link.
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self.assertFalse(
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host.ping(MAS[i][i * 3 - 1],
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backbone=True,
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ttl=64,
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interface=host.get_ip6_address(config.ADDRESS_TYPE.ONLINK_ULA)[0]))
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self.simulator.go(3)
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# 7. Host multicasts a packet to the multicast addresses, MA2.
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self.assertFalse(
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host.ping(MA2, backbone=True, ttl=64, interface=host.get_ip6_address(config.ADDRESS_TYPE.ONLINK_ULA)[0]))
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self.simulator.go(3)
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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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self.collect_leader_aloc(BR_1)
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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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# Loop steps 1 to 4 with i := 1 to 5.
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for i in range(1, 6):
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# 1. Router_1 registers for 15 multicast addresses, MASi.
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# [Automatic result:]
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# Unicasts an MLR.req CoAP request to BR_1 as follows:
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# coap://[<BR_1 RLOC> or <PBBR ALOC>]:MM/n/mr
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# Where the payload contains:
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# IPv6 Addresses TLV: MASi (15 addresses)
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_pkt = pkts.filter_wpan_src64(vars['Router_1']) \
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.filter_ipv6_2dsts(vars['BR_1_RLOC'], consts.PBBR_ALOC) \
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.filter_coap_request('/n/mr') \
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.filter(lambda p: set(p.thread_meshcop.tlv.ipv6_addr) == set(MAS[i][1:])) \
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.must_next()
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# 2. BR_1 Responds to the multicast registration.
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# BR_1 unicasts an MLR.rsp CoAP response to Router_1 as follows:
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# 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_1']) \
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.filter_ipv6_dst(_pkt.ipv6.src) \
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.filter_coap_ack('/n/mr') \
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.filter(lambda p: p.coap.mid == _pkt.coap.mid and p.thread_nm.tlv.status == 0) \
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.must_next()
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# 3. BR_1 informs other BBRs on the network of the multicast
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# registrations.
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# BR_1 multicasts a BMLR.ntf CoAP request to the Backbone Link,
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# as follows:
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# coap://[<All network BBRs multicast>]:BB/b/bmr
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# Where the payload contains:
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# IPv6 Addresses TLV: MASi (15 addresses)
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# Timeout TLV: default MLR timeout of BR_1
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pkts.filter_eth_src(vars['BR_1_ETH']) \
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.filter_ipv6_dst(config.ALL_NETWORK_BBRS_ADDRESS) \
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.filter_coap_request('/b/bmr') \
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.filter(
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lambda p: set(p.thread_meshcop.tlv.ipv6_addr) == set(MAS[i][1:]) and
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p.thread_bl.tlv.timeout == consts.MLR_TIMEOUT_MIN) \
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.must_next()
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# 4. BR_1 multicasts an MLDv2 message of type “Version 2
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# Multicast Listener Report” (see [RFC 3810] Section 5.2).
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# Where:
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# Nr of Mcast Address Records(M) >= 15
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# Multicast Address Record[j]:
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# Each of the j := 1 ... 15 Multicast Address Record containing an
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# address of the set MASi contains the following:
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# Record Type: 4 (CHANGE_TO_EXCLUDE_MODE)
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# Number of Sources (N): 0
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# Multicast Address: MASi[j]
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# Alternatively, the DUT may also send multiple of above messages
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# each with a portion of the 15 addresses MASi.
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# In this case the Nr of Mcast Address Records can be < 15
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# but the sum over all messages MUST be >= 15.
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# TODO
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# Loop steps 5 to 6 with i := 1 to 5.
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for i in range(1, 6):
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# 5. Host sends a ping packet to the multicast address,
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# MASi[ 3 * i - 1], on the backbone link.
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_pkt = pkts.filter_eth_src(vars['Host_ETH']) \
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.filter_ipv6_dst(MAS[i][3 * i - 1]) \
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.filter_ping_request() \
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.must_next()
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# 6. BR_1 forwards the ping packet of the previous step to its
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# Thread Network encapsulated in an MPL packet.
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pkts.copy().filter_wpan_src64(vars['BR_1']) \
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.filter_AMPLFMA(mpl_seed_id=vars['BR_1_RLOC']) \
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.filter_ping_request(identifier=_pkt.icmpv6.echo.identifier) \
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.must_next()
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# 7. Host multicasts a packet to the multicast addresses, MA2.
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_pkt = pkts.filter_eth_src(vars['Host_ETH']) \
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.filter_ipv6_dst(MA2) \
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.filter_ping_request() \
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.must_next()
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# 8. BR_1 does not forward the packet to its Thread Network.
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pkts.filter_wpan_src64(vars['BR_1']) \
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.filter_AMPLFMA() \
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.filter_ping_request(identifier=_pkt.icmpv6.echo.identifier) \
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.must_not_next()
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if __name__ == '__main__':
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unittest.main()
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@@ -52,6 +52,7 @@ MA6 = Ipv6Addr('ff02::1')
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MAe1 = Ipv6Addr('fd0e::1234:777a:1')
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MAe2 = Ipv6Addr('::')
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MAe3 = Ipv6Addr('cafe::e0ff')
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MAS = [[Ipv6Addr(f'ff0e::{j:x}:777a:{i:x}') for j in range(16)] for i in range(16)]
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ALL_MPL_FORWARDERS_MA = Ipv6Addr('ff03::fc')
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LINK_LOCAL_PREFIX = Bytes("fe80")
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