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[nexus] migrate test_srp_ttl.py to nexus (openthread#12960)
This commit migrates the SRP TTL test from the thread-cert Python framework to the Nexus C++ framework. The new Nexus test `test_srp_ttl.cpp` covers all four TTL clamping cases originally implemented in `test_srp_ttl.py`: 1. CLIENT_TTL < TTL_MIN < LEASE_MAX => Clamped to TTL_MIN. 2. TTL_MIN < CLIENT_TTL < TTL_MAX < LEASE_MAX => Used CLIENT_TTL. 3. TTL_MAX < LEASE_MAX < CLIENT_TTL => Clamped to TTL_MAX. 4. LEASE_MAX < TTL_MAX < CLIENT_TTL => Clamped to LEASE_MAX. Nexus tests provide faster and more scalable network simulations within a single process, improving CI efficiency. The original Python script `tests/scripts/thread-cert/test_srp_ttl.py` is removed as its functionality is now fully covered by Nexus.
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‎tests/nexus/CMakeLists.txt‎

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@@ -414,6 +414,7 @@ ot_nexus_test(srp_many_services_mtu_check "core;nexus")
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ot_nexus_test(srp_register_services_diff_lease "core;nexus")
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ot_nexus_test(srp_scale "core;nexus")
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ot_nexus_test(srp_server_reboot_port "core;nexus")
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ot_nexus_test(srp_ttl "core;nexus")
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ot_nexus_test(zero_len_external_route "core;nexus")
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# Trel

‎tests/nexus/test_srp_ttl.cpp‎

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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
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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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#include <stdio.h>
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#include <string.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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static void CheckTtl(Core &aNexus, Node &aServer, uint32_t aExpectedTtl)
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{
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const Srp::Server::Host *host = nullptr;
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// We advance time enough to trigger a refresh from the client.
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// The lease interval is at most 240 seconds in our test cases.
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aNexus.AdvanceTime(300 * Time::kOneSecondInMsec);
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while ((host = aServer.Get<Srp::Server>().GetNextHost(host)) != nullptr)
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{
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if (StringMatch(host->GetFullName(), "my-host.default.service.arpa.", kStringCaseInsensitiveMatch))
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{
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break;
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}
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}
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VerifyOrQuit(host != nullptr);
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const Srp::Server::Service *serverService = host->GetNextService(nullptr);
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VerifyOrQuit(serverService != nullptr);
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Log("Expected TTL: %u, Actual TTL: %u", aExpectedTtl, serverService->GetTtl());
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VerifyOrQuit(serverService->GetTtl() == aExpectedTtl);
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}
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void TestSrpTtl(void)
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{
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Core nexus;
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Node &server = nexus.CreateNode();
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Node &client = nexus.CreateNode();
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Log("----------------------------------------------------------------------------------------------------------");
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Log("Testing SRP TTL");
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server.Form();
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nexus.AdvanceTime(10 * Time::kOneSecondInMsec);
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VerifyOrQuit(server.Get<Mle::Mle>().IsLeader());
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server.Get<Srp::Server>().SetEnabled(true);
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nexus.AdvanceTime(1 * Time::kOneSecondInMsec);
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client.Join(server, Node::kAsFed);
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nexus.AdvanceTime(10 * Time::kOneSecondInMsec);
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VerifyOrQuit(client.Get<Mle::Mle>().IsChild());
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client.Get<Srp::Client>().EnableAutoStartMode(nullptr, nullptr);
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nexus.AdvanceTime(1 * Time::kOneSecondInMsec);
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SuccessOrQuit(client.Get<Srp::Client>().SetHostName("my-host"));
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Ip6::Address address;
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SuccessOrQuit(address.FromString("2001::1"));
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SuccessOrQuit(client.Get<Srp::Client>().SetHostAddresses(&address, 1));
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Srp::Client::Service service;
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ClearAllBytes(service);
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service.mName = "_ipps._tcp";
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service.mInstanceName = "my-service";
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service.mPort = 12345;
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SuccessOrQuit(client.Get<Srp::Client>().AddService(service));
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// Case 1: CLIENT_TTL < TTL_MIN < LEASE_MAX ==> TTL_MIN
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Log("Case 1: CLIENT_TTL < TTL_MIN < LEASE_MAX ==> TTL_MIN");
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{
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Srp::Server::TtlConfig ttlConfig;
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ttlConfig.mMinTtl = 120;
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ttlConfig.mMaxTtl = 240;
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SuccessOrQuit(server.Get<Srp::Server>().SetTtlConfig(ttlConfig));
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Srp::Server::LeaseConfig leaseConfig;
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leaseConfig.mMinLease = 120;
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leaseConfig.mMaxLease = 240;
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leaseConfig.mMinKeyLease = 240;
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leaseConfig.mMaxKeyLease = 240;
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SuccessOrQuit(server.Get<Srp::Server>().SetLeaseConfig(leaseConfig));
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client.Get<Srp::Client>().SetTtl(100);
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CheckTtl(nexus, server, 120);
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}
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// Case 2: TTL_MIN < CLIENT_TTL < TTL_MAX < LEASE_MAX ==> CLIENT_TTL
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Log("Case 2: TTL_MIN < CLIENT_TTL < TTL_MAX < LEASE_MAX ==> CLIENT_TTL");
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{
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Srp::Server::TtlConfig ttlConfig;
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ttlConfig.mMinTtl = 60;
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ttlConfig.mMaxTtl = 120;
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SuccessOrQuit(server.Get<Srp::Server>().SetTtlConfig(ttlConfig));
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Srp::Server::LeaseConfig leaseConfig;
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leaseConfig.mMinLease = 120;
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leaseConfig.mMaxLease = 240;
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leaseConfig.mMinKeyLease = 240;
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leaseConfig.mMaxKeyLease = 240;
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SuccessOrQuit(server.Get<Srp::Server>().SetLeaseConfig(leaseConfig));
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client.Get<Srp::Client>().SetTtl(100);
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CheckTtl(nexus, server, 100);
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}
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// Case 3: TTL_MAX < LEASE_MAX < CLIENT_TTL ==> TTL_MAX
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Log("Case 3: TTL_MAX < LEASE_MAX < CLIENT_TTL ==> TTL_MAX");
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{
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Srp::Server::TtlConfig ttlConfig;
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ttlConfig.mMinTtl = 60;
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ttlConfig.mMaxTtl = 120;
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SuccessOrQuit(server.Get<Srp::Server>().SetTtlConfig(ttlConfig));
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Srp::Server::LeaseConfig leaseConfig;
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leaseConfig.mMinLease = 120;
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leaseConfig.mMaxLease = 240;
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leaseConfig.mMinKeyLease = 240;
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leaseConfig.mMaxKeyLease = 240;
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SuccessOrQuit(server.Get<Srp::Server>().SetLeaseConfig(leaseConfig));
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client.Get<Srp::Client>().SetTtl(240);
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CheckTtl(nexus, server, 120);
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}
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// Case 4: LEASE_MAX < TTL_MAX < CLIENT_TTL ==> LEASE_MAX
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Log("Case 4: LEASE_MAX < TTL_MAX < CLIENT_TTL ==> LEASE_MAX");
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{
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Srp::Server::TtlConfig ttlConfig;
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ttlConfig.mMinTtl = 60;
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ttlConfig.mMaxTtl = 120;
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SuccessOrQuit(server.Get<Srp::Server>().SetTtlConfig(ttlConfig));
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Srp::Server::LeaseConfig leaseConfig;
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leaseConfig.mMinLease = 30;
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leaseConfig.mMaxLease = 60;
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leaseConfig.mMinKeyLease = 240;
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leaseConfig.mMaxKeyLease = 240;
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SuccessOrQuit(server.Get<Srp::Server>().SetLeaseConfig(leaseConfig));
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client.Get<Srp::Client>().SetTtl(240);
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CheckTtl(nexus, server, 60);
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}
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Log("Test passed successfully");
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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::TestSrpTtl();
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printf("All tests passed\n");
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return 0;
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}

‎tests/scripts/thread-cert/test_srp_ttl.py‎

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