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[nexus] migrate test_srp_auto_start_mode to Nexus (#12944)
This commit migrates the SRP auto-start test from the Python-based thread-cert test suite to the Nexus C++ test framework. The new Nexus test replicates the logic of the original Python test: - Forms a network with four router nodes. - Verifies SRP client auto-start upon server discovery in netdata. - Tests selection priority between multiple unicast and anycast SRP servers. - Verifies selection based on anycast sequence numbers. - Tests selection of specific unicast addresses published in Service Data. - Confirms automatic failover and client stop/restart. The original Python test file is removed as it is now covered by the Nexus test suite.
This commit is contained in:
Jonathan Hui
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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 ipaddress
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import unittest
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import command
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import config
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import thread_cert
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# Test description:
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# This test verifies SRP client auto-start functionality that SRP client can
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# correctly discovers and connects to SRP server.
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#
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# Topology:
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#
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# Four routers, one acting as SRP client, others as SRP server.
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#
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CLIENT = 1
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SERVER1 = 2
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SERVER2 = 3
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SERVER3 = 4
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class SrpAutoStartMode(thread_cert.TestCase):
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USE_MESSAGE_FACTORY = False
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SUPPORT_NCP = False
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TOPOLOGY = {
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CLIENT: {
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'name': 'SRP_CLIENT',
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'mode': 'rdn',
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},
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SERVER1: {
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'name': 'SRP_SERVER1',
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'mode': 'rdn',
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},
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SERVER2: {
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'name': 'SRP_SERVER2',
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'mode': 'rdn',
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},
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SERVER3: {
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'name': 'SRP_SERVER3',
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'mode': 'rdn',
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},
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}
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def test(self):
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client = self.nodes[CLIENT]
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server1 = self.nodes[SERVER1]
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server2 = self.nodes[SERVER2]
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server3 = self.nodes[SERVER3]
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#-------------------------------------------------------------------
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# Form the network.
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client.srp_server_set_enabled(False)
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client.start()
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self.simulator.go(config.LEADER_STARTUP_DELAY)
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self.assertEqual(client.get_state(), 'leader')
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server1.start()
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server2.start()
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server3.start()
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self.simulator.go(config.ROUTER_STARTUP_DELAY)
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self.assertEqual(server1.get_state(), 'router')
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self.assertEqual(server2.get_state(), 'router')
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self.assertEqual(server3.get_state(), 'router')
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server1_mleid = server1.get_mleid()
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server2_mleid = server2.get_mleid()
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server3_mleid = server3.get_mleid()
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anycast_port = 53
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#-------------------------------------------------------------------
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# Enable server1 with unicast address mode
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server1.srp_server_set_addr_mode('unicast')
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server1.srp_server_set_enabled(True)
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self.simulator.go(5)
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#-------------------------------------------------------------------
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# Check auto start mode on client and check that server1 is selected
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self.assertEqual(client.srp_client_get_auto_start_mode(), 'Enabled')
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self.simulator.go(2)
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self.assertEqual(client.srp_client_get_state(), 'Enabled')
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self.assertEqual(client.srp_client_get_server_address(), server1_mleid)
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#-------------------------------------------------------------------
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# Disable server1 and check client is stopped/disabled.
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server1.srp_server_set_enabled(False)
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self.simulator.go(5)
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self.assertEqual(client.srp_client_get_state(), 'Disabled')
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#-------------------------------------------------------------------
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# Enable server2 with unicast address mode and check client starts
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# again.
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server1.srp_server_set_addr_mode('unicast')
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server2.srp_server_set_enabled(True)
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self.simulator.go(5)
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self.assertEqual(client.srp_client_get_state(), 'Enabled')
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self.assertEqual(client.srp_client_get_server_address(), server2_mleid)
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#-------------------------------------------------------------------
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# Enable server1 and check that client stays with server2
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server1.srp_server_set_enabled(True)
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self.simulator.go(5)
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self.assertEqual(client.srp_client_get_state(), 'Enabled')
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self.assertEqual(client.srp_client_get_server_address(), server2_mleid)
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#-------------------------------------------------------------------
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# Disable server2 and check client switches to server1.
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server2.srp_server_set_enabled(False)
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self.simulator.go(5)
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self.assertEqual(client.srp_client_get_state(), 'Enabled')
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self.assertEqual(client.srp_client_get_server_address(), server1_mleid)
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#-------------------------------------------------------------------
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# Enable server2 with anycast mode seq-num 1, and check that client
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# switched to it.
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server2.srp_server_set_addr_mode('anycast')
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server2.srp_server_set_anycast_seq_num(1)
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server2.srp_server_set_enabled(True)
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self.simulator.go(5)
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server2_alocs = server2.get_ip6_address(config.ADDRESS_TYPE.ALOC)
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self.assertEqual(server2.srp_server_get_anycast_seq_num(), 1)
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self.assertEqual(client.srp_client_get_state(), 'Enabled')
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self.assertIn(client.srp_client_get_server_address(), server2_alocs)
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self.assertEqual(client.srp_client_get_server_port(), anycast_port)
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#-------------------------------------------------------------------
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# Enable server3 with anycast mode seq-num 2, and check that client
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# switched to it since seq number is higher.
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server3.srp_server_set_addr_mode('anycast')
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server3.srp_server_set_anycast_seq_num(2)
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server3.srp_server_set_enabled(True)
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self.simulator.go(5)
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server3_alocs = server3.get_ip6_address(config.ADDRESS_TYPE.ALOC)
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self.assertEqual(server3.srp_server_get_anycast_seq_num(), 2)
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self.assertEqual(client.srp_client_get_state(), 'Enabled')
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self.assertIn(client.srp_client_get_server_address(), server3_alocs)
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self.assertEqual(client.srp_client_get_server_port(), anycast_port)
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#-------------------------------------------------------------------
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# Disable server3 and check that client goes back to server2.
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server3.srp_server_set_enabled(False)
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self.simulator.go(5)
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self.assertEqual(client.srp_client_get_state(), 'Enabled')
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self.assertIn(client.srp_client_get_server_address(), server2_alocs)
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self.assertEqual(client.srp_client_get_server_port(), anycast_port)
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#-------------------------------------------------------------------
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# Enable server3 with anycast mode seq-num 0 (which is smaller than
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# server2 seq-num 1) and check that client stays with server2.
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server3.srp_server_set_anycast_seq_num(0)
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server3.srp_server_set_enabled(True)
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self.simulator.go(5)
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self.assertEqual(server3.srp_server_get_anycast_seq_num(), 0)
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self.assertEqual(client.srp_client_get_state(), 'Enabled')
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self.assertIn(client.srp_client_get_server_address(), server2_alocs)
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self.assertEqual(client.srp_client_get_server_port(), anycast_port)
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#-------------------------------------------------------------------
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# Disable server2 and check that client goes back to server3.
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server2.srp_server_set_enabled(False)
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self.simulator.go(5)
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self.assertEqual(client.srp_client_get_state(), 'Enabled')
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server3_alocs = server3.get_ip6_address(config.ADDRESS_TYPE.ALOC)
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self.assertIn(client.srp_client_get_server_address(), server3_alocs)
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self.assertEqual(client.srp_client_get_server_port(), anycast_port)
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#-------------------------------------------------------------------
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# Disable server3 and check that client goes back to server1 with
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# unicast address.
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server3.srp_server_set_enabled(False)
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self.simulator.go(5)
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self.assertEqual(client.srp_client_get_state(), 'Enabled')
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self.assertEqual(client.srp_client_get_server_address(), server1_mleid)
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#-------------------------------------------------------------------
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# Enable server2 with anycast mode seq-num 5, and check that client
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# switched to it.
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server2.srp_server_set_addr_mode('anycast')
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server2.srp_server_set_anycast_seq_num(5)
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server2.srp_server_set_enabled(True)
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self.simulator.go(5)
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server2_alocs = server2.get_ip6_address(config.ADDRESS_TYPE.ALOC)
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self.assertEqual(server2.srp_server_get_anycast_seq_num(), 5)
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self.assertEqual(client.srp_client_get_state(), 'Enabled')
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self.assertIn(client.srp_client_get_server_address(), server2_alocs)
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self.assertEqual(client.srp_client_get_server_port(), anycast_port)
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#-------------------------------------------------------------------
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# Publish an entry on server3 with specific unicast address
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# This entry should be now preferred over anycast of server2.
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unicast_addr3 = 'fd00:0:0:0:0:3333:beef:cafe'
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unicast_port3 = 1234
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server3.netdata_publish_dnssrp_unicast(unicast_addr3, unicast_port3)
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self.simulator.go(65)
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self.assertEqual(client.srp_client_get_state(), 'Enabled')
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self.assertEqual(client.srp_client_get_server_address(), unicast_addr3)
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self.assertEqual(client.srp_client_get_server_port(), unicast_port3)
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#-------------------------------------------------------------------
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# Publish an entry on server1 with specific unicast address
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# Client should still stay with server3 which it originally selected.
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unicast_addr1 = 'fd00:0:0:0:0:2222:beef:cafe'
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unicast_port1 = 10203
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server1.srp_server_set_enabled(False)
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server1.netdata_publish_dnssrp_unicast(unicast_addr1, unicast_port1)
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self.simulator.go(65)
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self.assertEqual(client.srp_client_get_state(), 'Enabled')
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self.assertEqual(client.srp_client_get_server_address(), unicast_addr3)
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self.assertEqual(client.srp_client_get_server_port(), unicast_port3)
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#-------------------------------------------------------------------
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# Unpublish the entry on server3. Now client should switch to entry
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# from server1.
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server3.netdata_unpublish_dnssrp()
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self.simulator.go(65)
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self.assertEqual(client.srp_client_get_state(), 'Enabled')
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self.assertEqual(client.srp_client_get_server_address(), unicast_addr1)
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self.assertEqual(client.srp_client_get_server_port(), unicast_port1)
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#-------------------------------------------------------------------
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# Unpublish the entry on server1 and check client goes back to anycast
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# entry from server2.
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server1.netdata_unpublish_dnssrp()
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self.simulator.go(65)
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self.assertEqual(client.srp_client_get_state(), 'Enabled')
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self.assertIn(client.srp_client_get_server_address(), server2_alocs)
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self.assertEqual(client.srp_client_get_server_port(), anycast_port)
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#-------------------------------------------------------------------
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# Finally disable server2, and check that client is disabled.
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server2.srp_server_set_enabled(False)
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self.simulator.go(5)
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self.assertEqual(client.srp_client_get_state(), 'Disabled')
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if __name__ == '__main__':
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unittest.main()
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