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[nexus] add MATN-TC-09 test case for Primary BBR failure (#12696)
This commit implements the MATN-TC-09 test case in the Nexus simulation framework to verify that a Secondary BBR correctly takes over forwarding of outbound multicast transmissions when the Primary BBR fails. Key implementation details include: - Implementation of the MATN-TC-09 test scenario in C++ simulating a topology with two Border Routers (BR_1 as initial Primary, BR_2 as Secondary/DUT) and a Thread Router. - Verification that BR_2 takes over as the Primary BBR and Leader after BR_1 is stopped. - Addition of a Python verification script to validate that only the Primary BBR forwards outbound multicast packets to the backbone link. - Use of distinct ICMPv6 identifiers to reliably distinguish between multicast pings sent before and after the Primary BBR failure. - Inclusion of the full test specification as inline comments in both the C++ and Python files. - Registration of the new test case in tests/nexus/CMakeLists.txt and tests/nexus/run_nexus_tests.sh.
This commit is contained in:
Jonathan Hui
@@ -240,6 +240,7 @@ ot_nexus_test(1_2_MATN_TC_3 "cert;nexus")
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ot_nexus_test(1_2_MATN_TC_4 "cert;nexus")
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ot_nexus_test(1_2_MATN_TC_5 "cert;nexus")
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ot_nexus_test(1_2_MATN_TC_7 "cert;nexus")
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ot_nexus_test(1_2_MATN_TC_9 "cert;nexus")
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# Misc tests
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ot_nexus_test(border_admitter "core;nexus")
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@@ -175,6 +175,7 @@ DEFAULT_TESTS=(
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"1_2_MATN_TC_4"
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"1_2_MATN_TC_5"
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"1_2_MATN_TC_7"
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"1_2_MATN_TC_9"
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)
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# Use provided arguments or the default test list
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@@ -0,0 +1,264 @@
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/*
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* Copyright (c) 2026, 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
|
||||
* 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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#include <stdio.h>
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#include "platform/nexus_core.hpp"
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#include "platform/nexus_node.hpp"
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namespace ot {
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namespace Nexus {
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/**
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* Time to advance for a node to form a network and become leader, in milliseconds.
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*/
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static constexpr uint32_t kFormNetworkTime = 10 * 1000;
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/**
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* Time to advance for a node to join as a router, in milliseconds.
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*/
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static constexpr uint32_t kAttachToRouterTime = 200 * 1000;
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/**
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* Time to advance for the network to stabilize, in milliseconds.
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*/
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static constexpr uint32_t kStabilizationTime = 10 * 1000;
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/**
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* Time to advance for the BBR selection to complete, in milliseconds.
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*/
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static constexpr uint32_t kBbrSelectionTime = 10 * 1000;
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/**
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* ICMPv6 Echo Request identifier.
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*/
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static constexpr uint16_t kEchoIdentifier = 0x1234;
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/**
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* ICMPv6 Echo Request payload size.
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*/
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static constexpr uint16_t kEchoPayloadSize = 10;
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/**
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* Multicast address MA1 (admin-local).
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*/
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static const char kMA1[] = "ff04::1234:777a:1";
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void TestMatnTc9(void)
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{
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/**
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* 5.10.7 MATN-TC-09: Failure of Primary BBR – Outbound Multicast
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*
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* 5.10.7.1 Topology
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* - BR_1: Test bed BR device initially operating as the Primary BBR.
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* - BR_2 (DUT): BR Device initially operating as a Secondary BBR. BR_1 is disconnected during this test; the DUT
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* becomes the Primary BBR afterwards.
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* - Router: Test bed device operating as a Thread Router.
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*
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* 5.10.7.2 Purpose & Description
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* Verify that a Secondary BBR can take over forwarding of outbound multicast transmissions from the Thread Network
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* when the Primary BBR disconnects. The Secondary in that case becomes Primary.
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*
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* Spec Reference | V1.2 Section
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* ---------------|-------------
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* Multicast | 5.10.1
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*/
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Core nexus;
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Node &br1 = nexus.CreateNode();
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Node &br2 = nexus.CreateNode();
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Node &router = nexus.CreateNode();
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Ip6::Address ma1;
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br1.SetName("BR_1");
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br2.SetName("BR_2");
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router.SetName("Router");
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SuccessOrQuit(ma1.FromString(kMA1));
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nexus.AdvanceTime(0);
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Instance::SetLogLevel(kLogLevelNote);
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Log("---------------------------------------------------------------------------------------");
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Log("Step 0: Topology formation – BR_1, Router, BR_2 (DUT)");
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/**
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* Step 0
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* - Device: N/A
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* - Description: Topology formation – BR_1, Router, BR_2 (DUT)
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* - Pass Criteria:
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* - N/A
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*/
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br1.AllowList(router);
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br1.AllowList(br2);
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router.AllowList(br1);
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router.AllowList(br2);
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br2.AllowList(br1);
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br2.AllowList(router);
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br1.Form();
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nexus.AdvanceTime(kFormNetworkTime);
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VerifyOrQuit(br1.Get<Mle::Mle>().IsLeader());
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br1.Get<BorderRouter::InfraIf>().Init(1, true);
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br1.Get<BorderRouter::RoutingManager>().Init();
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SuccessOrQuit(br1.Get<BorderRouter::RoutingManager>().SetEnabled(true));
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br1.Get<BackboneRouter::Local>().SetEnabled(true);
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router.Join(br1, Node::kAsFtd);
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nexus.AdvanceTime(kAttachToRouterTime);
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VerifyOrQuit(router.Get<Mle::Mle>().IsRouter());
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/**
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* P1: Router is configured such that it cannot become Leader when BR_1 disconnects during the test.
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*/
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router.Get<Mle::Mle>().SetLeaderWeight(0);
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br2.Join(br1, Node::kAsFtd);
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nexus.AdvanceTime(kAttachToRouterTime);
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VerifyOrQuit(br2.Get<Mle::Mle>().IsRouter());
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/**
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* Set BR_2 leader weight high to ensure it becomes leader.
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*/
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br2.Get<Mle::Mle>().SetLeaderWeight(255);
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br2.Get<BorderRouter::InfraIf>().Init(1, true);
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br2.Get<BorderRouter::RoutingManager>().Init();
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SuccessOrQuit(br2.Get<BorderRouter::RoutingManager>().SetEnabled(true));
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br2.Get<BackboneRouter::Local>().SetEnabled(true);
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nexus.AdvanceTime(kBbrSelectionTime);
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nexus.AdvanceTime(kStabilizationTime);
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nexus.AddTestVar("MA1", kMA1);
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Log("---------------------------------------------------------------------------------------");
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Log("Step 1: Router sends ICMPv6 Echo Request to MA1");
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/**
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* Step 1
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* - Device: Router
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* - Description: Harness instructs the device to send a ICMPv6 Echo (ping) Request packet to the multicast address,
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* MA1, encapsulated in an MPL packet
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* - Pass Criteria:
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* - N/A
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*/
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router.SendEchoRequest(ma1, kEchoIdentifier, kEchoPayloadSize);
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nexus.AdvanceTime(kStabilizationTime);
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Log("---------------------------------------------------------------------------------------");
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Log("Step 2: BR_1 forwards to LAN");
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/**
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* Step 2
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* - Device: BR_1
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* - Description: Automatically forwards the multicast ping request packet with multicast address, MA1, to the LAN.
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* - Pass Criteria:
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* - N/A
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*/
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Log("---------------------------------------------------------------------------------------");
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Log("Step 3: BR_2 (DUT) does not forward to LAN");
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/**
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* Step 3
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* - Device: BR_2 (DUT)
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* - Description: Does not forward the multicast ping request packet to the LAN.
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* - Pass Criteria:
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* - The DUT MUST NOT forward the multicast ICMPv6 Echo (ping) Request packet with multicast address, MA1, to the
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* LAN.
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*/
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Log("---------------------------------------------------------------------------------------");
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Log("Step 4a: BR_1 powers down");
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/**
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* Step 4a
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* - Device: BR_1
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* - Description: Harness instructs the device to power-down
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* - Pass Criteria:
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* - N/A
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*/
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br1.Get<Mle::Mle>().Stop();
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nexus.AdvanceTime(kAttachToRouterTime);
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Log("---------------------------------------------------------------------------------------");
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Log("Step 4b: BR_2 (DUT) becomes Leader/PBBR");
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/**
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* Step 4b
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* - Device: BR_2 (DUT)
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* - Description: Detects the missing Primary BBR and automatically becomes the Leader/PBBR of the Thread Network,
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* distributing its BBR dataset.
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* - Pass Criteria:
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* - The DUT MUST become the Leader of the Thread Network by checking the Leader data.
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* - Router MUST receive the new BBR Dataset from BR_2, where:
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* - • RLOC16 in Server TLV == The RLOC16 of BR_2
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* - All fields in the BBR Dataset Service TLV MUST contain valid values.
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*/
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VerifyOrQuit(br2.Get<Mle::Mle>().IsLeader());
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Log("---------------------------------------------------------------------------------------");
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Log("Step 5: Router sends ICMPv6 Echo Request to MA1");
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/**
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* Step 5
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* - Device: Router
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* - Description: Harness instructs the device to send a ICMPv6 Echo (ping) Request packet to the multicast address,
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* MA1, encapsulated in an MPL packet.
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* - Pass Criteria:
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* - N/A
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*/
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router.SendEchoRequest(ma1, kEchoIdentifier + 1, kEchoPayloadSize);
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nexus.AdvanceTime(kStabilizationTime);
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Log("---------------------------------------------------------------------------------------");
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Log("Step 6: BR_2 (DUT) forwards to LAN");
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/**
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* Step 6
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* - Device: BR_2 (DUT)
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* - Description: Automatically forwards the multicast ping request packet to the LAN.
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* - Pass Criteria:
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* - The DUT MUST forward the multicast ICMPv6 Echo (ping) Request packet with multicast address, MA1, to the LAN.
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*/
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nexus.SaveTestInfo("test_1_2_MATN_TC_9.json");
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}
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} // namespace Nexus
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} // namespace ot
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int main(void)
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{
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ot::Nexus::TestMatnTc9();
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printf("All tests passed\n");
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return 0;
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}
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@@ -0,0 +1,166 @@
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#!/usr/bin/env python3
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#
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# Copyright (c) 2026, 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:
|
||||
# 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
|
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# POSSIBILITY OF SUCH DAMAGE.
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#
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import sys
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import os
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# Add the current directory to sys.path to find verify_utils
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CUR_DIR = os.path.dirname(os.path.abspath(__file__))
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sys.path.append(CUR_DIR)
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import verify_utils
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from pktverify import consts
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from pktverify.addrs import Ipv6Addr
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def verify(pv):
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# 5.10.7 MATN-TC-09: Failure of Primary BBR – Outbound Multicast
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#
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# 5.10.7.1 Topology
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# - BR_1
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# - BR_2 (DUT)
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# - Router
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#
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# 5.10.7.2 Purpose & Description
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# Verify that a Secondary BBR can take over forwarding of outbound multicast transmissions from the Thread Network
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# when the Primary BBR disconnects. The Secondary in that case becomes Primary.
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#
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# Spec Reference | V1.2 Section
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# ---------------|-------------
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# Multicast | 5.10.1
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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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ECHO_ID1 = 0x1234
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ECHO_ID2 = 0x1235
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# Step 0
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# - Device: N/A
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# - Description: Topology formation – BR_1, Router, BR_2 (DUT)
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# - Pass Criteria:
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# - N/A
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print("Step 0: Topology formation – BR_1, Router, BR_2 (DUT)")
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# Step 1
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# - Device: Router
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# - Description: Harness instructs the device to send a ICMPv6 Echo (ping) Request packet to the multicast address,
|
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# MA1, encapsulated in an MPL packet
|
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# - Pass Criteria:
|
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# - N/A
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print("Step 1: Router sends ICMPv6 Echo (ping) Request packet to MA1")
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pkts.filter_ping_request(identifier=ECHO_ID1).\
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filter_wpan().\
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filter(lambda p: p.ipv6.dst == Ipv6Addr(vars['MA1']) or\
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p.ipv6.dst == 'ff03::fc').\
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must_next()
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# Step 2
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# - Device: BR_1
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# - Description: Automatically forwards the multicast ping request packet with multicast address, MA1, to the LAN.
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# - Pass Criteria:
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# - N/A
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print("Step 2: BR_1 forwards the multicast ping request packet to the LAN")
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pkts.filter_ping_request(identifier=ECHO_ID1).\
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filter(lambda p: not p.wpan).\
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filter(lambda p: p.eth.src == vars['BR_1_ETH']).\
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filter(lambda p: p.ipv6.dst == Ipv6Addr(vars['MA1'])).\
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must_next()
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# Step 3
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# - Device: BR_2 (DUT)
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# - Description: Does not forward the multicast ping request packet to the LAN.
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# - Pass Criteria:
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# - The DUT MUST NOT forward the multicast ICMPv6 Echo (ping) Request packet with multicast address, MA1, to the
|
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# LAN.
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print("Step 3: BR_2 (DUT) does not forward the multicast ping request packet to the LAN")
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pkts.copy().\
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filter_ping_request(identifier=ECHO_ID1).\
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filter(lambda p: not p.wpan).\
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filter(lambda p: p.eth.src == vars['BR_2_ETH']).\
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filter(lambda p: p.ipv6.dst == Ipv6Addr(vars['MA1'])).\
|
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must_not_next()
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# Step 4a
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# - Device: BR_1
|
||||
# - Description: Harness instructs the device to power-down
|
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# - Pass Criteria:
|
||||
# - N/A
|
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print("Step 4a: BR_1 powers down")
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# Step 4b: BR_2 (DUT) becomes Leader/PBBR
|
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# - Device: BR_2 (DUT)
|
||||
# - Description: Detects the missing Primary BBR and automatically becomes the Leader/PBBR of the Thread Network,
|
||||
# distributing its BBR dataset.
|
||||
# - Pass Criteria:
|
||||
# - The DUT MUST become the Leader of the Thread Network by checking the Leader data.
|
||||
# - Router MUST receive the new BBR Dataset from BR_2, where:
|
||||
# - • RLOC16 in Server TLV == The RLOC16 of BR_2
|
||||
# - All fields in the BBR Dataset Service TLV MUST contain valid values.
|
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print("Step 4b: BR_2 (DUT) becomes Leader/PBBR")
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pkts.filter_wpan_src64(vars['BR_2']).\
|
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filter_mle_cmd(consts.MLE_ADVERTISEMENT).\
|
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filter(lambda p: p.mle.tlv.leader_data.router_id == vars['BR_2_RLOC16'] >> 10).\
|
||||
must_next()
|
||||
|
||||
pkts.filter_wpan_src64(vars['BR_2']).\
|
||||
filter_mle_cmd(consts.MLE_DATA_RESPONSE).\
|
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filter_has_bbr_dataset().\
|
||||
filter(lambda p: vars['BR_2_RLOC16'] in p.thread_nwd.tlv.server_16).\
|
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must_next()
|
||||
|
||||
# Step 5
|
||||
# - Device: Router
|
||||
# - Description: Harness instructs the device to send a ICMPv6 Echo (ping) Request packet to the multicast address,
|
||||
# MA1, encapsulated in an MPL packet.
|
||||
# - Pass Criteria:
|
||||
# - N/A
|
||||
print("Step 5: Router sends ICMPv6 Echo (ping) Request packet to MA1")
|
||||
pkts.filter_ping_request(identifier=ECHO_ID2).\
|
||||
filter_wpan().\
|
||||
filter(lambda p: p.ipv6.dst == Ipv6Addr(vars['MA1']) or\
|
||||
p.ipv6.dst == 'ff03::fc').\
|
||||
must_next()
|
||||
|
||||
# Step 6
|
||||
# - Device: BR_2 (DUT)
|
||||
# - Description: Automatically forwards the multicast ping request packet to the LAN.
|
||||
# - Pass Criteria:
|
||||
# - The DUT MUST forward the multicast ICMPv6 Echo (ping) Request packet with multicast address, MA1, to the LAN.
|
||||
print("Step 6: BR_2 (DUT) forwards the multicast ping request packet to the LAN")
|
||||
pkts.filter_ping_request(identifier=ECHO_ID2).\
|
||||
filter(lambda p: not p.wpan).\
|
||||
filter(lambda p: p.eth.src == vars['BR_2_ETH']).\
|
||||
filter(lambda p: p.ipv6.dst == Ipv6Addr(vars['MA1'])).\
|
||||
must_next()
|
||||
|
||||
|
||||
if __name__ == '__main__':
|
||||
verify_utils.run_main(verify)
|
||||
@@ -629,7 +629,7 @@ class PacketFilter(object):
|
||||
|
||||
def filter_has_bbr_dataset(self):
|
||||
return self.filter("""
|
||||
thread_nwd.tlv.server.has('16')
|
||||
thread_nwd.tlv.server_16 is not null
|
||||
and thread_nwd.tlv.service.s_data.seqno is not null
|
||||
and thread_nwd.tlv.service.s_data.rrdelay is not null
|
||||
and thread_nwd.tlv.service.s_data.mlrtimeout is not null
|
||||
|
||||
Reference in New Issue
Block a user